2019Ⓒ 2020 The Institute for Solid State Physics, The University of Tokyo

Activity Report2019

Preface					

1Research Highlights		

2 - 39

Joint Research Highlights

40 - 51

Progress of Facilities		

52 - 59

Conferences and Workshops

60 - 65

Subjects of Joint Research

66 - 163

Publications

164 - 200

Preface

We would like to offer the readers the scientific activity report of theInstitute for Solid State Physics (ISSP) for the Japanese FY 2019.
ISSP was established in 1957 as a joint-use/research institute attachedto the University of Tokyo. In every era, we aim to lead the frontier of“condensed matter physics and materials science” and contribute to scienceand technology from the view of basic research. We have promoted activities
focused on research, education, and joint-use/joint-research.
The first part of the reports Research Highlights /Joint ResearchHighlights exhibits experimental and theoretical achievements in condensed
matter physics and materials science. In 2019, the number of granted jointresearch proposals is 1,421 and the total number of participants is 6,951.
The second part includes the reports on progress of facilities in 2019 as follows. (1) In International MegaGauss
Science Laboratory, the pulse magnets can generate up to 87 Tesla (T) by non-destructive manner, and from 100 T up
to 1200 T, the world strongest as an in-door record, by destructive methods to promote materials science under highmagnetic field. (2) In the Supercomputer Center (SCC), the replacement of the System B is scheduled in Autumn
2020, which will be much more powerful than the current System. In Center of Computational Materials Science,
the website "MateriApps" for information on application software in computational science has been constructedto support community members. The activity on deploying the MateriApps is awarded as the commendation for
Science and Technology by the Minister of Education, Culture, Sports, Science and Technology (MEXT) in 2019.
(3) In Neutron Science Laboratory, the technical progress of High Resolution Chopper (HRC) spectrometer has
been proceeded under high pressure and low temperature environment in cooperation with KEK. (4) The Laser andSynchrotron Research (LASOR) center has 10 groups in 2019, where ISSP has integrated the two streams, namely
the extreme lasers and synchrotron radiations, into the common platform. In Synchrotron Radiation Laboratory,
operand spectroscopy is available by using lasers at Harima branch.
In the following parts, nine reports of international and domestic conferences and workshops, subjects of joint
research, and list of publications have been presented.
In order to develop the international scientific network as scientific hub, new programs including the short time
(up to 3 months) international collaboration, international visiting researchers, and graduate students study abroad, as
well as foreign visiting professor and international workshop programs, have been conducted since 2017.
All these facts confirm that ISSP continues to develop successfully and dynamically as the global center of excellence of condensed matter physics and materials science. We appreciate continuous support and cooperation ofcommunities for our activities.
July, 2020

Hatsumi MORI
Director
Institute for Solid State Physics,
The University of Tokyo

ISSP Activity Report 20191

Research Highlights
Field-Induced Switching of
Ferro-Quadrupole Order Parameterin PrTi2Al20
Takigawa, Sakakibara, and Nakatsuji Groups
The series of Pr-based cubic compounds PrT2X20 (T =Ir, Rh, X = Zn; T = V, Ti, X = Al) has been actively studied
recently to explore novel phenomena caused by multipolesof 4f electrons because the non-Kramers Γ3 doublet groundstates in the crystalline electric field (CEF) has active−
quadrupole (OZ = 3z2-r2 and OX = √3 (x2-y2)) and an octupole(TXYZ = xyz) moments but no magnetic dipole moment [1].
Among this series, PrTi2Al20 shows the highest transition
temperature of 2 K into a simple ferro-ordered state of OZ
quadrupole moment.
We have performed 27Ai-NMR and magnetization
measurements on high quality single crystals of PrTi2Al20
and unexpectedly observed discontinuous switching of
quadrupole order parameter by applying small magnetic
fields B of a few tesla along [001] and [110] but not along[111] directions [2]. The symmetry of order parameters
for different field directions were determined as shown in
Fig. 1. For B along [111], there is a single ordered phaseof OZ type below TQ = 2.2 K, which is independent of
B. Here we expect coexistence of three domains, where
the symmetry axis Z of the quadrupole moment points
along three equivalent <001> directions. The quadrupole order parameter can be conveniently represented as a
two-dimensional vector with OZ and OX chosen to be thebasis (rightmost panel of Fig. 1) [3]. For example, orderparameters of the three domains for B ∥ [111] is given by−−
OZ = 3x2– r2 = –OZ / 2 + √3 OX / 2 and 3y2– r2 = –OZ / 2 + √3−
OX / 2, corresponding to the polar angle of 0 and ±2π /√3 .
For B along [001], however, discontinuous jump of the
NMR frequency occurs near 2 tesla with a finite range offield where two lines coexist, indicating a first order phasetransition (Fig. 2a). From the analysis of NMR spectra andFig. 1. The temperature vs. magnetic field phase diagram of the ferroquadrupole order in PrTi2Al20 for B ∥ [111], [001], and [110]. The
order parameters are indicated by graphical symbols corresponding
to specific values of θ in the order parameter space shown in therightmost panel. The phase boundaries are determined by the peak ofd(C/T)/dt, C being the specific heat, splitting of the NMR lines, or kinkin the Knight shift. The dashed lines for B ∥ [001] and [110] indicate
the region of coexistence of high- and low-field phases. For B ∥ [001]and [110], there is no phase transition but only a crossover as a functionof temperature in high fields.

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ISSP Activity Report 2019

Fig. 2. (a) Magnetic-field dependence of the NMR spectrum (plotted asa function of shift from the nuclear Zeeman frequency) for B ∥ [001] at
1.5 K. ( b) The temperature dependences of the Knight shift at low (1T)and high (6.6T) magnetic field along [001] are compared with those of
the magnetic susceptibility.

magnetic susceptibility, we conclude that while the high field
phase has ferro-order of OZ with Z ∥ B, the order parameterof the low field phase is closer to OX type (θ ~ ±π/2). For B
along [110], the order parameter changes from OZ with Z ∥B in low fields to Z ~ –B in high fields. The field-induced
transition was also confirmed by measurements of heat
capacity and magnetocaloric effect [4].
We have developed a Landau theory to identify symmetry
allowed interactions between quadrupole and magnetic field,
which can account for the experimentally observed switchingof the order parameter [2]. Frist, the magnetic field induces
mixing between Γ3 ground doublet and excited CEF levels,
leading to the van-Vleck paramagnetism. This anisotropic
Zeeman interaction, which is quadratic in B, turns out tostabilize the order parameters observed in the high field
phases both for B ∥ [001] and B ∥ [110], leaving only a crossover as a function of temperature. On the other hand, we
found that symmetry allows interaction between quadrupoles
on neighboring Pr sites, which is responsible for the ferroquadrupole order, to depend also quadratically on B for small
B. This anisotropic interaction competes against the Zeeman
interaction and can stabilize the order parameter of the low
field phases. Therefore, the observed switching of the orderparameter can be explained if the anisotropy of the quadrupole-quadrupole interaction wins the Zeeman interaction at
low fields but becomes suppressed at high fields comparedwith the Zeeman interaction. We have indeed succeeded in
reproducing the experimental phase diagram by assuming a
non-monotonic field dependence of the anisotropic quadrupole interaction.
Although the mechanism for such a non-trivial fielddependence of the quadrupole interaction is not understoodyet, anomalous behavior of the NMR Knight shift in thequadrupole ordered states provides an important insight.
As shown in Fig. 2(b), the Knight shift at Al sites, whichprobes the polarization of conduction electron spin, shows
the identical temperature dependence to the magnetic susceptibility at a high field (6.6T). At a low field (1T), however,they show remarkable separation below the orderingtemperature, indicating that the hybridization between 4f andconduction electrons (c-f hybridization) is strongly influenced by the quadrupole order. Since the quadrupole-quadrupole interaction is mediated by the c-f hybridization, thismeans that the quadrupole order modifies the quadrupolequadrupole interaction via redistribution of 4f charge density,
which in turn should affect the order itself. We suspect thatsuch a feedback mechanism may be the key to understand thefield-induced discontinuous transition.
References[1] T. Onimaru and H. Kusunose, J. Phys. Soc. Jpn. 85, 082002 (2016).
[2] T. Taniguchi et al., J. Phys. Soc. Jpn. 88, 084707 (2019).
[3] K. Hattori and H. Tsunetsugu, J. Phys. Soc. Jpn. 83, 034709 (2014).

[4] S. Kittaka et al., J. Phys. Soc. Jpn. 89, 043701 (2020).

Authors
T. Taniguchi, K. Hattoria, M. Yoshida, H. Takeda, S. Nakamura,T. Sakakibara, M. Tsujimoto, A. Sakai, Y. Matsumoto, S. Nakatsuji, and
M. Takigawa
aTokyo Metropolitan University

Fluctuation-Induced First-Order
Transition and Tricritical Pointin a Cubic Chiral Magnet EuPtSi
Sakakibara GroupThe cubic chiral compound EuPtSi (space group P213)
helimagneitcally orders at TN=4.0 K with the propagation
vector q1*=(0.2,0.3,0.04). There has been growing interestin this compound because a skyrmion lattice phase with atriple-q structure emerges in a magnetic field applied along
the [111] direction [1,2]. One of the intriguing features of thiscompound is that the transition at TN is of first order [1-3].
We studied the helimagnetic transition on a single crystal of
EuPtSi by means of high-precision magnetization measurements, and found that the transition, which is of first order at
low fields, becomes of second order at high fields, and there
exists a tricritical point (TCP) in the phase diagram [4].
Figure 1 shows the temperature derivative of the magnetization, dM/dT, in magnetic fields H applied along the [110]direction. At H = 1.8 kOe, the first-order transition (FOT)
is characterized by a sharp peak in dM/dT at T = 4.0 K. By
increasing H, TN(H) defined by the peak position in dM/dTmoves to the lower temperature side with a decrease in thepeak amplitude. Above H = 8.8 kOe, the shape of dM/dT

Fig. 2. Phase boundary between the paramagnetic and the single-q
helical (conical) states of EuPtSi, constructed by colour contour
mapping of the dM/dT data with H||[110]. The bright line in low fields
indicates the first-order boundary, whereas the dashed line shows thesecond-order one. TCP denotes the position of the tricritical point.

dramatically changes and excibits a step function like jumpat TN(H), implying that the transition becomes of second
order above 8.8 kOe.
In order to construct the phase boundary between theparamagnetic and the ordered states, we show in Fig. 2
the color contour mapping of the dM/dT data for H||[110].
The bright line in the low-field region indicates the FOTboundary, and the dashed line in the high-field region
denotes the second-order one. In between there is a TCP as
indicated in the figure. A similar crossover of the transition
has also been observed for [111] and [100] directions [4].
In systems described by order parameters with n>4components, a usual second-order phase transition is
avoided due to interactions among critical fluctuations of
the order parameters [5]. FOT then takes place when thecorrelation length exceeds a certain limit, where a discontinuous phase transition occurs to a state energeticallyfavorable. This fluctuation-induced FOT takes place evenfor systems in which the mean-field theory predicts secondorder phase transitions, and the actual transition temperature
is suppressed much below the mean-field transition temperature. In EuPtSi, the lattice-symmetry operations on q1*
yields 12 distinct propagation vectors, which is large enoughin number to drive the transition to be first order. Applying amagnetic field reduces the symmetry of the system, and thenumber of components of the order parameter is effectively
decreased, leading to a second-order phase transition. The
presence of TCP in the phase diagram in Fig. 2 supports this
scenario of a fluctuation-induced FOT in EuPtSi. This situation is favorable for the occurrence of multi-q orders such as
the skyrmion lattice phase, since they need to be stabilizedagainst a single-q helical (or a conical) phase.
References[1] M. Kakihana et al., J. Phys. Soc. Jpn. 87, 023701 (2018).
[2] K. Kaneko et al., J. Phys. Soc. Jpn. 88, 013702 (2019).
[3] D.G. Franco et al., Phys. Rev. B 96, 014401, (2017).
[4] T. Sakakibara et al., J. Phys. Soc. Jpn. 88, 093701 (2019).
[5] P. Bak, S. Krinsky and D. Mukamel, Phys. Rev. Lett. 36, 52 (1976).

Fig. 1. Temperature derivative of the magnetization dM/dT of EuPtSi infields applied along the [110] direction.

Authors
T. Sakakibara, S. Nakamura, S. Kittaka
M. Kakihanaa, M. Hedoa, T. Nakamaa, and Y. Onukia
aUniversity of Ryukyus

ISSP Activity Report 20193

Effects of Molecular Dynamics on the
Anhydrous Proton Conductivity of
Imidazolium Hydrogen Dicarboxylates
Mori Group
Hydrogen (H) is a ubiquitous element, which plays
important role in a wide range of fields from the deep underground to the interstellar space, and from inorganic oxides
to biosystems. Proton (H+) migration in solids is one of suchextensively studied research topics. Recently, anhydrous
organic proton conductors, which can show proton conductivity at above 100 °C without humidification, have attracted
scientific interests owing not only to their wide applicability as solid-state electrolytes for fuel cells, but also totheir peculiar proton conduction mechanism mediated notby water molecules. However, there have been only a few
reports about anhydrous organic proton conductors.
Previously, we investigated the “intrinsic” proton conductivities of imidazolium succinate (= Im-Suc; Fig. 1a) andglutarate (= Im-Glu; Fig. 1b), by single-crystal measurements, and successfully disclosed two key factors for realization of anhydrous proton conductivity: (1) the hydrogenbond (H-bond) network structures, and (2) difference of the
proton donating/accepting abilities between acid and basemolecules, i.e., ΔpKa [1]. In this study, we newly preparedhigh-quality single crystals of another salt, imidazolium
fumarate (Im-Fum; Fig. 1c), in addition to Im-Suc and
Im-Glu, and investigated the effect of molecular “dynamics”
on the anhydrous proton conductivities of these three salts[2].
Im-Fum has similar 2D H-bond network structure as
Im-Suc and Im-Glu (Fig. 1), and showed the anisotropic
proton conductivity consistent with the previously disclosed“static” key factors (1) and (2). Interestingly, Im-Fum
exhibits linear dependence on the reciprocal temperature incontrast to non-linear dependence in Im-Suc and Im-Glu.
We speculated that it is contributed by the imidazolium
cation in the 2D H-bond network because the Ea showed
quite high values in Im-Suc and Im-Glu similar to the otherimidazolium-based salts, and that the molecular orientationof imidazolium cation is different between Im-Fum and theother two. Thus, we investigated the dynamic property ofimidazolium cations in these salts by high-temperature X-ray
structure analyses and solid-state 2H NMR.
In Im-Suc, a structural transition was observed in X-ray
structural analysis at ca. 80 °C, accompanied with thein-plane orientational disorder of imidazolium molecules in
one out of two layers. Consistently, the proton conductivity
showed abrupt increase at ca. 80 °C, which indicates that theimidazolium libration motion promotes proton conduction
in Im-Suc (Fig. 2 upper). On the other hand, no significant

Fig. 1. (upper) Chemical structures and (lower) H-bond network structures of (a) Im-Suc, (b) Im-Glu, and (c) Im-Fum. Red and black dashedlines denote N–H…O and O–H…O H-bonds, respectively.

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ISSP Activity Report 2019

Fig. 2. (upper) The single-crystal proton conductivity (σ) and (lower)
libration angle θlib vs. 1000/T plots for Im-Suc (orange and dark orange
circles), Im-Glu (green diamonds), and Im-Fum (pink squares). In
upper graph, the lines denote the Arrhenius fitting, and the inset figures
show ordered/disordered imidazolium cation in Im-Suc below/above
the transition temperature, ca. 80 °C. In bottom graph, filled circles,
diamonds, and squares denote libration angles of Im-Suc (orange)[3],Im-Glu (green), and Im-Fum (pink) in the proton-conducting temperatures, and open markers denote those below proton-conducting temperatures. Inset shows the model for the libration motion of imidazolium
cations.

changes were observed for Im-Glu and Im-Fum in X-ray
analyses.
Then, in order to investigate the local dynamics ofimidazolium cations, we performed the solid-state 2H NMR
experiments for Im-Glu and Im-Fum using imidazoled3 molecules (Fig. 2 lower inset). By spectral simulations
assuming the two-site jump model describing the libration motion of imidazolium molecules, we estimated thelibrational rates klib and angles θlib. Comparing the libration angles θlib and proton conductivities σ of Im-Glu and
Im-Fum together with the reported values of Im-Suc [3],magnitude of θlib is Im-Glu > Im-Suc > Im-Fum, in consistent with the same relationship of σ. This result clearly
indicates that the libration motion of the imidazolium cations
promotes proton conduction in these salts.
We consider that this “dynamic” factor synergistically contributes to anhydrous proton conductivity withthe already mentioned the “static” factors. Imidazolium
molecules lie within the 2D H-bond network in Im-Suc and
Im-Glu whereas imidazolium sticks out from the networkin Im-Fum (Fig. 1). In former case, directions of librationand proton conduction matches, and the libration can makeadditional H-bonds or short contacts to promote the protontransfer in the H-bond network, leading to the nonlinear
dependence of σ in the Arrhenius plot, whereas it is not for
the latter case.

In conclusion, in addition to previously disclosed “static”
key factors, (1) H-bond network structures and (2) ΔpKa
between acid and base molecules, we revealed that (3) the
molecular “dynamics” is another key factor for realization ofanhydrous proton conductivity. These “static” and “dynamic”
factors synergistically play important roles, which is thought
as peculiar nature of Grotthuss-type conduction in anhydrous
solids.
References[1] Y. Sunairi, A. Ueda, J. Yoshida, K. Suzuki, and H. Mori, J. Phys.
Chem. C 122, 11623 (2018).
[2] Y. Sunairi, S. Dekura, A. Ueda, T. Ida, M. Mizuno, and H. Mori,
J. Phys. Soc. Jpn. 89, 051008 (2020).
[3] T. Umiyama, R. Ohashi, T. Ida, and M. Mizuno, Chem. Lett. 42,1323 (2013).
Authors
Y. Sunairi, S. Dekura, A. Uedaa, T. Idab, M. Mizunob, and H. MoriaKumamoto University
bKanazawa University

Topological Properties ofτ-Type Organic Conductors
Osada Group
It is desirable that topological phases can be realized inorganic molecular crystals with high designability. However,the search for topological states in organic crystals has met
with some challenges. Generally, organic molecular crystals
have too poor symmetry to protect topological states. The
width of their tight-binding band is too narrow to cause theband inversion. Moreover, organic molecules consist of lightelements with correspondingly small spin–orbit coupling(SOC). So far, only a few molecular crystals, such as a

Fig. 1. (a) Schematics of a conducting layer of τ-type organic conductors. A and B indicate donor molecule sites, and X indicates anion
sites. (b) Bulk band dispersion of τ-type conductors with finite spinorbit coupling (SOC). A gap opens at the quadratic band contact point
at M. (c) Energy dispersion of the system with finite width. Helicaledge states along AA and BB edges appear in the gap. (d) Hofstadterbutterfly (energy spectra as a function of magnetic field) of τ-typeconductors. Blue and Red patterns correspond to up-spin and downspin, respectively. The value of SOC is enlarged to see its effect easily.

two-dimensional (2D) Dirac semimetal α-(BEDT-TTF)2I3
and a 3D nodal-line Dirac semimetal Pd(dddt)2, have beenstudied as topological materials in the field of organic
conductors.
Here, we demonstrate that the conducting layer of τ-typeorganic layered conductor, τ-(EDO-S,S-DMEDT-TTF)2X1+yand τ-(P-S,S-DMEDT-TTF)2X1+y (X=AuBr2, I3, IBr2), is a
2D electron system with unique topological properties [1].
On each layer, donor molecules (EDO-S,S-DMEDT-TTF
or P-S,S-DMEDT-TTF) form a square lattice, and anion
molecules (X) are arranged on it with a checkerboard pattern
as shown in Fig. 1(a). This lattice structure is a modification of Mielke's lattice, which is a typical flat band system,so that topological natures of Mielke's lattice are inherited.
In addition, rather strong spin-orbit coupling (SOC) can be
expected in τ-type conductors, although SOC is generally
weak in organic materials. It results from the strong in-planepotential modulation generated by the inorganic anion X.
Using a Kane-Mele type model, we discuss possible topological properties of the τ-type organic conductors.
In the absence of SOC, the conduction and valence bands
with four-fold rotational symmetry show quadratic band
touching. Since the Fermi level is located in the conduction
band, the actual τ-type organic conductors (y = 0.75~0.875)
have is a star-shaped electron Fermi surface. Under thein-plane uniaxial strain breaking the four-fold symmetry, theband contact point splits into a pair of Dirac cones. This is akind of Lifshitz transition from a 2D Luttinger semimetal toa 2D Dirac semimetal.
Once the SOC becomes finite, a small gap opens at theband contact point as seen in Fig. 1(b). The product of thevalence band parity values at symmetric point (time-reversal
invariant momentums) is -1. This fact indicates that the
gapped state is a topologically nontrivial insulator with bandinversion. In fact, there exists a helical edge state characteristic to the quantum spin Hall insulator (Z2-topologicalinsulator) along each edge as shown in Fig. 1(c). Therefore,
the actual τ-type conductors could be regarded as heavilydoped topological insulators. Since they have finite spindependent Berry curvature at the Fermi level, finite spin Hall
effect could appear although its experimental detection needs
microfabrication of samples.
Because of finite spin-dependent orbital magnetic
moment due to SOC, the Landau levels (LLs) have additional
spin splitting to the Zeeman effect. Figure 1(d) shows the
Hofstadter butterfly of the LLs for each spin subband. Since
the Zeeman effect is not included in this figure, the difference of both spin levels indicates the orbital contribution to
the spin splitting due to SOC. At the zero-field limit, we cansee the Chern number below the SOC gap takes finite valuesof -1 or +1 depending on the spin. As actual τ-type conductors are doped up to 10% of the conduction band, the orbital
contribution to the spin splitting is about several % of the
Zeeman splitting, which is possible to detect experimentallyin the Shubnikov-de Haas oscillations at low temperature andhigh magnetic fields.
Reference[1] T. Osada, J. Phys. Soc. Jpn. 88, 114707 (2019).
Authors
T. Osada, T. Taen, K. Uchida, M. Sato, and A. Kiswandhi

ISSP Activity Report 20195

Nonequilibrium Dynamics in Strongly
Correlated Electrons in One Dimension
and Clogged Charge Current
Tsunetsugu Group
Understanding nonequilibrium dynamics in strongly
correlated systems is an important issue and a big challenge
for both theorists and experimentalists. Recently proposed
generalized hydrodynamic (GHD) theory [1] succeeds indescribing nonequilibrium dynamics in one-dimensionalmodels that are exactly solvable through the Bethe ansatz(BA) equations. Its fundamental degrees of freedom are
local distribution function of multiple types of “quasiparticles” corresponding to real roots and complex roots (strings)
in the BA equations. These distribution functions evolve inspace and time following continuity equations, and theseequations include effective velocities that need to be determined self-consistently from the local distribution functions.
We have applied the GHD theory to the one-dimensional Hubbard model and studied quench dynamics witha partitioning protocol [2]. The system is initially divided
at the origin x = 0 to two semi-infinite parts. The left partis equilibrated at a fixed temperature with half-fillingelectron density, while the right part is set empty and has
no electrons. At time t = 0, the two parts are connected
and start to evolve. In this case, local physical quantities
depend only on the ray ξ = x/t, and vary continuously in thetransient region VL < ξ < VR. We have calculated charge andenergy densities, n(ξ), e(ξ), and their currents, jn(ξ), je(ξ), andexamined the proportionality relation between jn(ξ) and je(ξ).
An interesting finding is a phenomenon we named clogging.
Inside the transition region, there appears at high temperatures a region that has zero charge current although nonzero
energy current flows. This clogged region locates next to theleft part with half-filling electron density. A similar behavior
was found for spin current in quantum spin systems [3]. We
proved its presence in the infinite temperature limit, and also
confirmed by numerical calculations a finite region size,
which shrinks with decreasing temperature. In the clogged
region, one type of quasiparticles have the same charge
as electron and they flow towards the empty side as one
expects. This charge current is cancelled by the counterflow
carried by other types of quasiparticles that are bound statesof multiple electrons. All the types of quasiparticles carrynegative energy towards the empty part, thus leading to anonzero energy current in the clogged region.
The clogging of charge current is an interestingFig. 1. Profile of charge and energy currents at reciprocal temperature
β = 0.5 and 1.0. Coulomb repulsion is U = 8, and energy units are theelectron transfer energy. Charge current jn is normalized by the electron
charge –|e|.

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ISSP Activity Report 2019

Fig. 2. Change of clogged region with reciprocal temperature β at U=8.

unexpected behavior in nonequilibrium dynamics of strongly
correlated electrons in one dimension, and it is worth trying
to observe it in experiments.
References[1] O.A. Castro-Alvaredo, et al., Phys. Rev. X 6, 041065 (2016); B.
Bertini et al., Phys. Rev. Lett. 117, 207201 (2016).
[2] Y. Nozawa and H. Tsunetsugu, Phys. Rev. B 101, 035121 (2020).
[3] L. Piroli et al., Phys. Rev. B 96, 115124 (2017).
Authors
H. Tsunetsugu and Y. Nozawa

High-Harmonic Generation in Solids
Kato Group
Recently, high-harmonic generation (HHG) in solids
has been experimentally observed. In contrast to that of thegaseous media, solids have the vastly diverse nature such as
in their band structures, energy gaps, crystalline anisotropy,
magnetism, and so on. Thus, HHG shows various properties depending on the materials, and clarifying the universal
properties of HHG in solids should be needed to progress thehigh-intensity optical technology.
Based on this motivation, we have theoretically investigated HHG mechanism in solids. In Ref. [1] and [2], we haveshown that the HHG mechanism can be classified into three
regimes depending on the field intensity: (i) the multiphoton
absorption regime, (ii) ac Zener regime, and (iii) semimetal
regime. This consideration enables us to predict that HHG
in graphene would show unique properties in its ellipticity
dependence, and this was identified in the experiment [3]. In
this consideration, a concept of the field-induced dynamic
band structure is essential to gaining a full understanding of
extreme nonlinear optics in solids. Although fundamental
mechanisms of HHG in solids have already been revealed[3], the connection between HHG and other high-field
phenomena, such as the dynamical Franz-Keldysh effect,
above-threshold ionization, and dynamical localization has

Fig. 1. NIR frequency dependence of 2nd HSG for Eg = 21ωTHz in thecase of (a) ΩTHz = 0.5ωTHz, (b) ΩTHz = ωTHz, and (c) ΩTHz = 2ωTHz. The
blue and red lines indicate positive and negative 2nd HSG, respectively.

not been clarified yet. It appears that HHG and these opticalphenomena are different aspects of the same electron interaction with the strong light field. We tried to clarify the relation
between HHG and these phenomena, by supposing thepump-probe spectroscopy where weak near infrared (NIR)
and strong terahertz (THz) light are simultaneously imposed.
The weak NIR and strong THz lights induce the highorder sideband generation (HSG), which changes dependingon the THz intensity and NIR frequency. These changes are
considered as a probe of the modified states of solids understrong THz light irradiation. Figures 1 (a)-(c) show theintensities of 2nd positive and negative HSG as a function of
NIR frequency (ωNIR) for different THz intensities (ΩTHz).
These figures indicate that with increasing the THz intensities, more peaks at different frequencies of ωTHz become
visible, which reflects the modified state of the system has
new energy levels around the band-gap energy. By an analytical consideration, we have shown that these energy levels(subbands) are derived from a concept of the field-induced
dynamic band structure, as shown in Fig. 2(a). We have also
shown that kth Bessel function, ΩTHz Jk(ΩTHz/ωTHz), effectively describes mixing matrix elements between the kth
subband and the valence band, which can be used for a roughestimate of the transition amplitude. This presumption could
be identified by numerical calculation, as shown in Fig. 2(b),where the positive 2nd HSG resonates to subbands with theirenergy levels Eg = 20ωTHz, Eg = 19ωTHz, and Eg = 18ωTHz,

respectively (see Fig. 2(a)). These non-monotonic properties are generally confirmed in other high-field phenomena
such as the dynamical Franz-Keldysh effect and dynamical
localization. Thus, we could clarify the relationship between
HHG and other high-field phenomena and suggest a newexperiment for identifying oscillatory behavior that would beobserved in field-intensity dependence of HHG in solids [5].

Fig. 2. (a) Schematic diagram of the subband picture originating from
temporally changing band structure. (b) Numerical results of positive
2nd HSG as a function of ΩTHz/ωTHz. Here, the red, blue, and green
dots indicate (A) ωNIR = 18ωTHz, (B) ωNIR = 17ωTHz, and (C) ωNIR =16ωTHz, respectively, whose processes are illustrated in (a). Inset figure:
Analytic results of 2nd HSG as a function of ΩTHz/ωTHz. The red, blue,and green lines show |xJ-1(x)|2, |xJ-2(x)|2, and |xJ-3(x)|2, respectively,
where x = ΩTHz/ωTHz.

Fig. 1. (a) Schematic diagram of unitary operation on an electron spin
flying qubit. An FQ is injected to channel-1 and some portion of the
wave packet tunnels into channel-2 with down spin (gaining of zenith
angle.) During the travel, the FQ gains azimuth angle via the differencein the kinetic phase. The spin state is detected as the overall transmission amplitude. (b) Optical micrograph of metallic gates (regions withorange color) configuration fabricated on a 2DES. Edge conduction
channels and measurement circuits are illustrated and superposed.

References[1] T. Tamaya et al., Phys. Rev. Lett. 116, 016601 (2016).
[2] T. Tamaya et al., Phys. Rev. B 94, 241107(R) (2016).
[3] N. Yoshikawa, T. Tamaya, and K. Tanaka, Science 356, 736 (2017).
[4] T. Tamaya and T. Kato, Phys. Rev. B 100, 081203(R) (2019).
[5] P. Xia*, T. Tamaya*, C. Kim, F. Lu, T. Kanai, N. Ishii, J. Itatani,
H. Akiyama, and T. Kato: arXiv:2004.04492. (*equally contributed)
Authors
T. Tamaya and T. Kato

Electric Control of Flying Qubit on
Quantum Hall Edge Channels
Katsumoto GroupFor composing a quantum circuit with electron spins,“flying qubits” (FQs) are used for transferring quantum
information between qubit clusters. A simple realization of
FQ is an electron wave packet, which brings 1 qubit information as its spin. In a flight process, quantum decoherence,
i.e. loss of information should be avoided, and also a unitary
operation on the FQ is desirable. In the quantum Hall effectone-dimensional channels are formed at the sample edges(quantum Hall edge channel, QHEC) and the quantum
coherence of electronic states on them are robust against
disturbances from the environment. Also when the magnetic

ISSP Activity Report 20197

Reference[1] T. Nakajima, K. T. Lin, and S. Komiyama, AIP Conf. Proc. 1566,
301 (2013).
Authors
T. Shimizu, Y. Hashimoto, A. Endo, T. Nakamura, and S. Katsumoto

Spin Excitations Propagation Dynamics
along Skyrmion Strings
Otani Group
Fig. 2. Current distribution ratio to drain L, which is equal to the overall
transmission coefficient of channel-1 in Fig.1(b) as a function of centergate voltage.

field is strong enough, the electronic states of QHECs are
spin-polarized due to the Zeeman energy and the exchange
effect (quantum Hall ferromagnet). Hence in a spin up anddown pair of QHEC, the spin and orbital degrees of freedom
are quantum mechanically entangled. If one can separate
an electron wave packet into two QHECs in such a pair,
operations on the orbitals readily change the spin states.
For example, spin precession can be realized through the
Aharonov-Bohm (AB) interference. Here we report unitary
operation of FQs on QHECs by using non-adiabatic interedge channel tunneling.
Figure 1(a) shows the scheme of the unitary operation. From the right end, an electron wave packet with up
spin is injected into QHEC-1 and experiences partial interedge tunneling to QHEC-2, which corresponds to a gainof zenith angle in electron. During the travel to the left
crossing, a phase difference is given, which corresponds
to an azimuth angle rotation. The partition rate to QHEC-1
reflects both zenith and azimuth angles. We realized such
quantum interference circuits on semiconductor (AlGaAs/
GaAs) two-dimensional system (2DES) and micro-fabricated
Schottky gates on it. In Fig.1(b), we illustrate the channels
for FQs, the terminals and measurement circuits superposedon an optical micrograph of the sample gate configuration on
a 2DES. The first crossing point is realized by Gate SR as a
sharp corner, where inter edge tunneling is caused by spinorbit interaction. The phase difference between QHEC-1
and 2 is developed during the travel along the down edges ofGate SR, C and SL. This process corresponds to the precession of the spin around the zenith axis (z-axis). At the left
end of the device, the two QHEC are intermixed again andthe total transmission rate to the electrode L reflects bothzenith and azimuth angles.
In Fig. 2, we plot the current partition ratio (distribution
ratio, D) to drain L as a function of the gate voltage applied
to gate C (VC). The parameter is the gate voltage applied togate SR (VSR). A large oscillation versus VC is visible andthe amplitude strongly depends on VSR. The oscillation is aconsequence of interference in kinetic phases of QHEC-1
and 2, or equivalently precession of electron spin (azimuth
angle rotation) [1]. Here VC is changing the distance between
the two channels. The amplitude depends on the zenith
angle of the spin, and should be largest making the visibility
100%, when the spin is in xy-plane. Hence from the amplitude we can deduce the zenith angle, e.g. 14 degree for VSR=
-0.549 V.
From the above, we conclude that unitary operation onelectron spin FQ can be done electrically by using spinpolarized QHEC.

8ISSP Activity Report 2019

Magnetic skyrmions, topological solitons characterized
by a two-dimensional swirling spin texture, have recently
attracted attention as stable particle-like objects. In threedimensional systems, the skyrmion can form a string structure by extending in the third dimension, which consists of
the uniform stacking of two-dimensional skyrmions along
the string direction. Skyrmion strings can be considered as
an analog of the vortex line in a superfluid, type-II superconductors, and trapped dilute-gas Bose-Einstein condensates orthe cosmic string in the universe. They are all flexible, andsome of these strings are proposed to host a resonant oscillation mode propagating through the string path. This implies
the possible coherent signal transfer along skyrmion strings,
whereas the propagation character of their excitations has
rarely been investigated before.
Experimentally, such skyrmion strings appear in aseries of bulk magnets with chiral cubic atomic lattice.
The examples are metallic B20 or β-Mn-type Co-Zn-Mn
alloys and insulating Cu2OSeO3, the latter of which is thetarget of this work. In these materials, the Dzyaloshinskii–
Moriya (DM) interaction is the key to the skyrmion formation. For a limited temperature range, these compounds
host a hexagonal lattice of skyrmion strings aligned along
the static magnetic field (H) direction. This skyrmion
crystal (SkX) phase is predicted to host three distinctive
magnetic resonance modes (Fig. 1a–c), i.e., the counterclockwise (CCW) and clockwise (CW) rotational modes
both excited by an oscillating magnetic field Hν⊥H, as wellas the breathing (B) mode excited by Hν⁄⁄H, which have

Fig. 1. a-c Schematic illustration of CCW, breathing, and CW excitation modes on skyrmion strings. The central part represents the local
oscillation manner of skyrmion at the z = 0 plane. The upper andlower parts are the snapshot images describing how the spin excitation launched at z = 0 propagates on the skyrmion strings, along the ±z
direction parallel and antiparallel to H, respectively. The cross-sectional
images describing the size and position of skyrmion at selected z-planes(shown by red layers) are also indicated. d The direction of the local
magnetic moment at the core and edge position of skyrmion in each z
layer. Black rounded arrows denote the sense of local moment precession in the time domain, and ± symbols indicate the sign of local
Dzyaloshinskii-Moriya interaction energy gain DM.

recently been identified by magnetic resonance experiments. However, these previous works mostly focused on thecharacter of non-propagating uniform excitations with wave
number kSW = 0. To understand their propagation character,the employment of a different experimental approach sensitive to the kSW ≠ 0 regime, as well as the theoretical identification of their dispersion relation, is essential.
In the present study, we experimentally demonstrate thecoherent propagation of spin excitations along skyrmion
strings for the chiral-lattice magnet Cu2OSeO3. We findthat the counter-propagating spin excitations show different
propagation behavior, and the degree of non-reciprocity,
as well as the associated group velocity and decay length,
are strongly dependent on the character of the excitation
modes. Our theoretically calculated dispersion relations well
reproduce these experimental features. The observed decay
lengths exceed 50 μm, reflecting the excellent long-rangeorder of the skyrmion-string structure. The present results
revealed the peculiar propagation dynamics of skyrmionstring excitations and suggest that skyrmion string can be
an excellent medium for magnon transport with uniquefunctionalities. Our combined experimental and theoreticalanalyses offer a comprehensive account of the propagation
dynamics of skyrmion-string excitations and suggest thepossibility of unidirectional information transfer along such
topologically protected strings.
Reference[1] S. Seki, M. Garst, J. Waizner, R. Takagi, N. D. Khanh, Y. Okamura,
K. Kondou, F. Kagawa, Y. Otani, and Y. Tokura, Nat. Commun. 11, 256(2020).
Authors
S. Sekia,b,c, M. Garstd, J. Waiznere, R. Takagia,b, N. D. Khanhb, Y.
Okamuraa, K. Kondoub, F. Kagawaa,b, Y. Otani and Y. Tokuraa,baThe University of Tokyo
bRIKEN Center for Emergent Matter Science (CEMS)
cPRESTO, Japan Science and Technology Agency (JST)dInstitut für Theoretische Festkörperphysik, Karlsruher Institut fürTechnologie
eInstitut für Theoretische Physik, Universität zu Köln

Creation of Magnetic Skyrmionsby Surface Acoustic Waves
Otani Group
Non-collinear and non-coplanar spin textures, such as
chiral domain walls and helical or triangular spin structures,bring about diverse functionalities. Among them, magnetic
skyrmions, particle-like non-coplanar topological spin
structures characterized by a non-zero integer topologicalcharge called the skyrmion number (Nsk), have great potential for various spintronic applications, such as energysaving, non-volatile memory, and non-von Neumanndevices. Current pulses can nucleate skyrmion in thin-film
samples but require relatively large current densities, which
probably causes Joule heating. Moreover, skyrmion creation
is localized at a specific position in the film, dependingon the sample design. Here, we experimentally demonstrate an approach to skyrmion creation employing surface
acoustic waves (SAWs); in asymmetric multilayers of Pt/
Co/Ir, propagating SAWs induce skyrmions in a wide areaof the magnetic film (Fig. 1a,b). We use multilayer filmsof Pt/Co/Ir in which the formation of thermodynamicallystable skyrmions has already been well-studied in previous

Fig. 1. a, Schematic spin configuration of Néel skyrmion. b, Schematic
illustration of the device structure. Pt/Co/Ir films are deposited on
LiNbO3 substrates, and interdigital transducers (IDTs) are fabricated on both sides of a rectangular-shaped Pt/Co/Ir film. Surface
acoustic waves (SAWs) are excited by applying radio-frequency (RF)voltage to IDTs. c-e, Polar Kerr images before (a), during (b), andafter (c) exciting a propagating surface acoustic wave (SAW) with thewavelength (λSAW) of 16 μm by applying radio-frequency (RF) voltage
with the power (P) of 251 mW. The white dashed lines represent theboundaries between Pt/Co/Ir film and LiNbO3 substrate. The orange
arrow represents the propagation direction of SAW.

research. All measurements were performed at room temperature, and the magnetic field (H) was applied perpendicular
to the film plane. Firstly, we determined, from magnetic
images taken before and after the application of SAWs
at various H, the magnetic field Hsk at which skyrmions
begin to appear in the ferromagnetic state without SAWs.
The magnetic field evolution of polar Kerr images in a Pt/
Co/Ir film with the nominal Co thickness of dCo = 0.55 nm
shows that maze domains firstly appear at μ0H = 0.01 mT
and transforms to thermodynamically stable skyrmions 3 μm
in diameter at 0.21 mT. A further increase in H makes theskyrmions annihilate and leads to the ferromagnetic state at
μ0H = 0.31 mT. Here, we note that the size of the observed
skyrmions is relatively large, indicating that the dipole-dipole
interaction plays an essential role in their stabilization, in
addition to the interfacial DMI, and these types of skyrmion
are sometimes called a ‘skyrmion bubble’.
Figures 1c–e represent the magnetic images before andduring excitation by the propagating SAWs. Before exciting
with SAWs, we observe no magnetic contrast (Fig. 1c),which indicates that the sample is in the single-domain
ferromagnetic state. When the SAW is continuously excited,skyrmions appear (Fig. 1d); skyrmions are nucleated overalmost the whole region of a rectangular-shaped Pt/Co/
Ir film of width 100 μm and length 400 μm because of thelong propagation length of the SAWs. Even after turning
off the SAW, most of the skyrmions survive, indicating the
emergence of metastable skyrmions (Fig. 1e). The density(nsk) of the nucleated skyrmions in the ferromagnetic state
gradually increases with RF power above the threshold of P
= 100 mW (Fig. 2a). When H is close to Hsk, the number ofskyrmions dramatically increases after exciting with SAWs.
Besides, when the skyrmions coexist with the ferromagnetic
state before exciting with SAWs, that is, H < Hsk, skyrmions

ISSP Activity Report 20199

Fig. 2. a, Density of skyrmions (nsk) as a function of the power of the
RF signal that excites the SAWs. b, Magnetic field dependence of nsk
before and after exciting a SAW with λSAW = 16 μm and P = 251 mW.

are also created. The value of nsk after exciting with SAWs ismuch larger than that before exciting with SAWs (Fig. 2b).
In contrast, skyrmions cannot be created in the high fieldregion. This is probably because, in the high field region, theenergetically stable ferromagnetic state cannot accommodate
skyrmions due to the gain in Zeeman energy, even when
SAWs are excited.
Micromagnetic simulations reveal that inhomogeneous
torque arising from both SAWs and thermal fluctuations
creates magnetic textures, with pair structures consistingof a Néel skyrmion like and an antiskyrmion-like structure.
Subsequently, such pairs transform into a Néel skyrmion
due to the instability of the antiskyrmion-like structure ina system with interfacial Dzyaloshinskii–Moriya interaction. Our findings provide a tool for efficient manipulationof topological spin objects without heat dissipation and overlarge areas, given that the propagation length of SAWs is of
the order of millimeters.
Reference[1] T. Yokouchi, S. Sugimoto, B. Rana, S. Seki, N. Ogawa, S.
Kasai, and Y. Otani, Nat. Nanotechnol. 15, 361 (2020).
Authors
T. Yokouchia, S. Sugimotob, B. Ranaa, S. Sekia,c,d, N. Ogawaa,c, S.
Kasaiab,c and Y. Otani
aRIKEN Center for Emergent Matter Science (CEMS)
bNational Institute for Materials Science (NIMS)
cPRESTO, Japan Science and Technology Agency (JST)dThe University of Tokyo

Fig. 1. (a) Schematic model of an FeN/Ni/Fe/Ni film formation process
on Cu(001) by surfactant epitaxy using N atoms. First, monolayerc(2x2) Ni2N is formed on Cu(001) surface as shown in (b) by N adsorption and Ni deposition. Then, 1-ML Fe is deposited below 150 K. Afterannealing above 300 K, N atoms segregate to the Fe surface and Fe2N
monolayer is formed. Next, on top of this surface, 1-ML Ni is deposited
below 150 K. By repeating deposition and annealing, the L10 FeNi film
is prepared. (b) STM image of a Ni2N atomic layer on Cu(001) (left)
and its ball model (right). The 0.5-ML N form c(2x2) structure with
1x1 Ni atoms [1].

dicular to the film has not been realized because the in-plane
film shape anisotropy is larger than the magnetocrystalline
anisotropy. The limitation in the epitaxial films has been
attributed to the imperfect atomic layer-by-layer mode in thealternative deposition process of Fe and Ni atoms and theintermixing of the two elements at the interface.
We have demonstrated significant improvement of
the uniaxial magnetic anisotropy of an L10 FeNi epitaxial
film prepared by surfactant epitaxy of Fe and Ni atomic
layers using nitrogen (N) atoms and the deposition on acooled Cu(001) substrate [1]. The N-surfactant epitaxy,
that is, successive and selected segregation of the N atoms
to the surface during the alternate Fe and Ni monolayer

Large Magnetic Anisotropy of
L10 Ultrathin Film Grown by
Nitrogen-surfactant Epitaxy
Komori GroupFor the development of useful magnetic materials, important are uniaxial magnetic anisotropy with high magnetic
moment, coercivity, and transition temperature. Moreover,for their wide use, rare-element free materials are strongly
required. One of the excellent candidates of such magnetic
materials is L10 FeNi with large uniaxial anisotropy energy,
Ku, up to 1.3 MJm-3. While its single crystal cannot be
prepared by conventional macroscopic crystal growth,
the single-crystal films have been fabricated by layer-bylayer epitaxial growth on Cu(001) and other substrates in a
vacuum. The Ku values of the films are, however, lower than
the above ideal one. Thus, the magnetic anisotropy perpen-

10

ISSP Activity Report 2019

Fig. 2. (a) Fe L-edge XAS (upper) and XMCD (lower) spectra of
the NiN/Fe/Ni trilayer for the NI and GI geometries. In the NI (GI)geometry, the magnetic field direction is 0° (55°) off from the surface
normal to the [100] direction of the Cu(001) substrate. The XAS intensity was measured with the photon helicity parallel (I+) and antiparallel(I−) to the external magnetic field of 5 T at 8 K. (b) Narrow- (upper)
and wide- (lower) range Fe magnetization (M) curves of the NiN/Fe/Ni
trilayer [1].

(ML) deposition in the present case, suppresses the mixing
between Fe and Ni atoms during the deposition andannealing. The schema is given in Fig. 1(a). It was previously shown on the N-adsorbed Cu(001) substrate that N
atoms segregate to the surface during the Fe and Co deposition without mixing between the deposited metal and thesubstrate Cu atoms [2]. This is quite in contrast to the mixing
during the deposition of magnetic transition metals on thesame substrate [3]. Sharp interface between the atomic layersof Fe and Ni in the film is ensured by the present method.
A monatomic layer is grown on the cooled substrate whilebilayer islands are formed at room temperature. Satisfactory growth of the L10 FeNi films up to four monolayers
was confirmed after post-annealing process at 430 K byin-situ X-ray photoelectron spectroscopy, scanning tunnelingmicroscopy and low energy electron diffraction. Magnetic
properties were studied using element-specific soft-X-ray
magnetic circular dichroism (XMCD). The value of Fe L2,3
XMCD is an order of magnitude larger than that of Ni L2,3
XMCD, and thus the Fe monolayer dominates the magnetismof the film. The results of the NiN/Fe/Ni trilayer are shownin Fig. 2. The Fe hysteresis curve measured at 8 K indicatesthe out-of-plane magnetocrystalline anisotropy is large
enough for overcoming the in-plane film shape anisotropy.
According to the XMCD sum rule analyses, both Fe and Ni
magnetic moments increase with increasing the thickness ofthe FeNi film.
References[1] K. Kawaguchi et al., Phys. Rev. Material 4, 054403 (2020).
[2] D. Sekiba et al., Surf. Sci. 590, 138 (2005).
[3] H. L. Meyerheim et al., Phys. Rev. B 71, 035409 (2005).
Authors
K. Kawaguchi,T. Miyamachi, T. Iimori, Y. Takahashi, T. Hattori,
T. Yokoyamaa, M. Kotsugib, and F. Komori
aInstitute for Molecular SciencebTokyo University of Science

Enhanced Critical Magnetic Field
for Mono-Layer Superconductor
by Step Confinement
Hasegawa GroupIn a usual superconductor, electrons that have opposite
momentum are bound to form a Cooper pair. Under magnetic
fields, the pairs lose their stability as the field exerts forcesthat unbalance the electrons’ momenta. Since breaking thepairs costs an energy, however, superconductivity survives up
to a certain magnetic field. Enhancing the robustness against
magnetic field is technically important, e.g. for generatinghigh magnetic fields. In the case of thin films, superconductivity is naturally robust against the in-plane magnetic field
because the above-mentioned orbital breaking mechanism issuppressed due to the geometrical limitation. It would therefore be an impact if one finds approaches that make themrobust against magnetic fields in other directions. We report
here that for a single atomic layer superconductor narrowing
terraces by steps improves the tolerance against the out-ofplane magnetic field.
Here as a monolayer (ML) superconductor, we used a−−Pb-induced reconstructed structure, √ 3 × √ 43 Pb/Si(111),
whose nominal Pb coverage is 1.23 ML. An STM image
and a tunneling spectrum taken on the structure at 0.4 K

Fig. 1. (a) Atomically −resolved− image and (b) tunneling conductancespectrum taken on the √ 3 × √ 43 Pb/Si(111) structure at 0.4 K.

are presented in Fig. 1. From a fitting of the spectrum with
the Dynes function, whose curve is drawn with a red line in
Fig. 1(b), we found the gap is 0.28 meV. Figures 2(a) show
an STM image taken in a wider area (1μm×1μm). The whole− −surface is covered with the √ 3 × √ 43 phase including the area
close to the step edges. In the same area as Fig. 2(a), we havetaken spatial mappings of tunneling conductance at zero bias
voltage (ZBC: zero bias conductance), which corresponds
to the minimum conductance in the superconducting gap,
under various out-of-plane magnetic fields. The amount of
the magnetic field ranges from 0 to 400 mT, as shown in
Figs. 2(b-h). The ZBC mapping taken under zero field(Fig. 2(b)) demonstrates almost uniform distribution of the
deep gaps (low ZBC value) over the entire surface, indicting
uniform superconductivity including the area of steps. The
steps do not locally break the superconductivity of the ML
Pb structure.
When the out-of-plane magnetic fields of 30-100 mT(Figs. 2(c-f)) are applied, several round protrusions ofhigh-ZBC (light green) area are observed. The size of the
protrusion is mostly uniform and the diameter is ~100 nm.

− −Fig. 2. (a) STM image of √ 3 × √ 43 Pb/Si(111). (b-h) zero bias conductance mappings in the same field of view with (a) taken under theout-of-plane magnetic field of 0, 30 mT, 50 mT, 80 mT, 100 mT,
150 mT, and 400 mT, respectively.

ISSP Activity Report 201911

The number of the protrusions increases with the magnetic
field, and the ZBC value at the center of the protrusions isalmost same as the saturated ZBC measured at high magnetic
fields (e.g. 400 mT of Fig. 2(h)). These features lead us to
identify these protrusions as a vortex. We noticed in the
mapping of 80 and 100 mT (Figs. 2(e, f)) that the vortices
are formed only around the middle of wide terraces, apparently repelled from the step edges. In a narrow terrace thatis observed vertically around the center of the images, novortices are found. The apparent repelling of vortices by
step edges can be explained with the presence of Josephson
vortices at the step edges [1]. A Josephson vortex, formed
at a Josephson junction, has an extended core along thejunction with suppressed breaking of superconductivity,
and therefore appeared dark (blue) along the junction, that
is, along the step edges in our case. Since all the vortices
including Josephson’s exhibit repulsive interaction with eachother, the conventional vortices seem repelled from the stepedges.
In parallel with the vortex formation, the amount of ZBC
behind the vortices gradually increases with the appliedmagnetic field. At 150 mT (Fig. 2(g)), the vortices almost
lose their contrast with the background, which signals saturation of ZBC. Strikingly, in the narrow terrace, ZBC is still
low, clearly demonstrating suppression of the superconductivity breaking there. In order to break the superconductivityof the narrow terrace, further increase in the magnetic field
was required up to 400 mT (Fig. 2(h)), where all the area
reached the saturated ZBC value. The spatially resolved ZBC
evolution presented in Fig. 2 clearly demonstrates that thefield that makes ZBC saturated, which corresponds to thecritical magnetic field, is larger in the narrow terrace than thewide terraces.
From the ZBC evolutions we then investigated how thecritical field (Hc2) depends on the terrace width w. For thequantitative analysis we first estimated Hc2 at various sites bymeasuring the amount of the out-of-plane magnetic field thatsaturates ZBC, and then dependence of the estimated Hc2 onterrace width w was investigated. Our analysis indicated aclear crossover around w = 200 nm; for w > 200 nm Hc2 isconstant whereas for w < 200 nm Hc2 increases steeply withthe reduction in w.
According to the Ginzburg-Landau (GL) equation,
H c2 of low dimensional superconductors whose cross−section is narrower than 2√ 2 ξ is given by a formula of Hc2 =2
4 0/πw , where w is the width (the length of short side) of
the cross-section and 0 is magnetic flux quantum. We thus
expected our Hc2 measured on narrow terraces (< 200 nm)
are also explained with the formula. However, Hc2 of our
step-confined terraces was found markedly larger than theformula. In order to explain our results, we had to introduce a width-reduction factor w0 in the formula as Hc2 =4 0/π(w-w0)2, and found good agreements with w0 = 37 nm.
The effective reduction in terrace width is probably due tothe presence of Josephson vortices; their presence effectively
reduces the terrace width through the modification of theboundary condition at the edges. Based on our experimental
results we thus conclude that the step confinement makes thesuperconductor tolerant against the out-of-plane magnetic
field more effectively than the geometrical confinement. It
should be noted here that since the steps work as a Josephson
junction, the superconductivity is not totally disconnected;
coherent supercurrent flows across the steps, which is an
important aspect for practical applications.

12

ISSP Activity Report 2019

Reference[1] S. Yoshizawa et al., Phys. Rev. Lett. 113, 247004 (2014).
Authors
F. Oguro, Y. Sato, K. Asakawa, M. Haze, and Y. Hasegawa

Carrier Transport in Gradient-Doped
Photoelectrochemical Electrodes
Lippmaa GroupThe interest in developing electrode materials for photoelectrochemical water splitting cells stems from a visionof a sustainable and pollution-free hydrogen-based energy
cycle. In essence, the technique is reliant on the development of wide-gap semiconductor materials that are electrochemically and structurally stable over an extended time
period, measured in years, in a hydrogen or oxygen evolution
reaction under sunlight illumination. Perovskite titanates
such as SrTiO3 provide the prerequisite stability in water, butsuffer from a variety of intrinsic factors that rate-limit thesolar-to-chemical energy conversion process. The primaryrate-limiting issues are the non-optimal band gap of 3.2
eV and a short, sub nanosecond photocarrier lifetime. Theband gap can be brought down closer to the optimal value ofaround 2 eV by doping, but adding dopants to the crystal also
tends to further shorten the carrier lifetime to picosecond
range, negating any possibility of high-efficiency diffusive
photocarrier transport from the bulk of the semiconductor to
the water interface to drive the water splitting reaction.
We have recently attempted to determine the role ofTi-site dopants on the energy conversion efficiency underultraviolet band-gap excitation using non-doped andNb-doped SrTiO3 single crystals (A-D) shown in Fig. 1.

Fig. 1. (A to D) Nb:SrTiO3 single-crystal electrode materials, withdoping levels of A:0%, B:1%, C:0.1%, D:0.04%. (A-D) photoelectrochemical cell configuration. Electrode crystal shown in violet, surface
depletion layer in yellow. (E,F) Cell configuration for thin film samples
consisting of a SrTiO3 film (yellow) on a metallic Nb:SrTiO3 substrate(violet).

Fig. 2. Illustration of energy conversion efficiency, which is proportional to the cyclic voltammetry current for crystals A to F. The atomic
force microscope images for films E and F illustrate the difference insurface morphology related to lower (E) and higher (F) point defectdensities in the films.

The corresponding cyclic voltammetry curves are shownin Fig. 2, where the current density is directly proportional
to the efficiency of the energy conversion process, i.e., thenumber of generated gas molecules. The photoresponse ofa non-doped 0.5-mm-thick SrTiO3 crystal (A) is zero due tothe large resistance of the insulating crystal, which preventscurrent flow in an electrochemical cell (PEC) illustrated inFig. 1(A-D). Photoinduced holes in the surface depletion
layer of the substrate crystal, marked with a yellow gradientin the PEC diagram in Fig. 1, drive the oxygen evolution
reaction but the short lifetime of photocarriers prevents
diffusive photoelectron transport through the bulk part of thecrystal, stopping the water splitting reaction.
Electron transport becomes possible when bulk conductivity is induced by slight Nb doping of SrTiO3 at the Ti site.
As shown in Fig. 2, the efficiency gradually increases as thedoping level is reduced from 1% to 0.04% (B to D). Further
doping reduction will lead to reduced efficiency due toincreasing internal resistance of the substrate crystals.
Improvement of the PEC efficiency can be achieved witha bilayer heterostructure design that combines a non-doped
defect-free SrTiO3 crystal in the ~100 nm thick surface
depletion region of the electrode with a slightly-doped
Nb:SrTiO3 substrate, illustrated in Fig. 1(E,F). Photocarrier recombination losses are minimized and extraction
efficiency maximized in the depletion region where thehigh internal field associated with the surface band bending
drives fast carrier transport, whereas bulk doping is used topromote electron transport in the bulk diffusive region of theelectrode. Ideally, a continuously varying doping gradientcould be used to match the bulk doping level to the width of
the surface depletion layer by growing a crystal with a depthdirection gradient of the doping level.
As a simplified demonstration of this concept, we grewa high-crystallinity film with a minimal point defect density
and an atomically flat surface morphology (Fig. 2, E) on ahighly-doped Nb:SrTiO3 substrate [1]. The importance of
defect density control can be seen in a comparison electrode,which was grown at a low temperature and thus contained ahigh density of point defects (Fig. 2, F). The energy conversion performance of the defect-rich film was, as expected,
nearly zero.
This work demonstrates the importance of point defectdensity control in PEC electrode materials and shows that
depth-graded doping control can be a viable strategy fordesigning efficient hydrogen generation photoelectrochemical electrodes.

The Roles of Step-Site and Zinc in
Surface Chemistry of Formic Acid on
Clean and Zn-mModified Cu(111)and Cu(997) Surfaces
Yoshinobu Group
Methanol is of great interest as a source of futurehydrogen energy systems, because it is a useful chemicalthat can produce hydrogen. On the other hand, the synthesisof methanol from CO2 and H2 (CO2 + 3H2 → CH3OH +H2O) is one of the effective use of CO2, where the Cu/ZnO
catalyst has been used for this reaction. However, the detailsof reaction mechanism including intermediate species havenot been fully elucidated yet. The chemistry of formic acid(HCOOH) on Cu surfaces is important, because the formate
species (HCOO) is one of the stable intermediate species inmethanol synthesis.
In this study, we systematically investigated the adsorption, desorption and decomposition of formic acid (HCOOH)
on Cu(111), Cu(997), Zn-Cu(111) and Zn-Cu(997)using high-resolution X-ray photoelectron spectroscopy(HR-XPS), temperature programmed desorption (TPD) andinfrared reflection absorption spectroscopy (IRAS) [1]. On
the clean Cu(111) surface, 13% of formic acid molecules
adsorbed at 83 K were dissociated to form bidentate formate
species by heating at 300 K (Fig. 1a); however, on the
Zn-Cu(111) surface, only 4% or less of adsorbed HCOOH
were dissociated into the bidentate formate species (Fig. 1b).
On the other hand, 13% of adsorbed HCOOH were alreadydissociated into monodentate formate species on Cu(997)

Reference[1] S. Kawasaki, R. Takahashi, and M. Lippmaa, J. Phys. Chem. C,
123, 15551 (2019).
Authors
S. Kawasakia, R. Takahashi, and M. Lippmaa
aNIMS

Fig. 1. C 1s XPS spectra of formic acid and formate species as afunction of temperature on (a) Cu(111), (b) Zn-Cu(111), (c) Cu(997)
and (d) Zn-Cu(997)

ISSP Activity Report 201913

even at 83 K and 17% of adsorbed formic acid molecules
were transformed to bidentate formate species by heating(Fig.1c). Thus, the stepped Cu surface has higher reactivity
for HCOOH dissociation at low temperature. On the
Zn-Cu(997) surface, 20% of formic acid became bidentate
formate species in contrast to the case with Zn-Cu(111) (Fig.
1d); the Zn deposited Cu step surface shows special activity
for adsorption and dissociation of formic acid.
The desorption peak maxima of the formate decomposition products (CO2 and H2) on Zn-Cu(997) were shifted tohigher temperature than those on Cu(997) in TPD results.
Thus, the Zn on Cu surfaces plays an important role in thestabilization of formate species, which probably leads to thedecrease in the activation barrier for hydrogenation on the
Zn-Cu surface. The bidentate formate species at the Zn-Cu
sites can remain after heating at 472 K on Zn-Cu(997); we
found that the formate species at Zn-Cu step sites are further
stabilized. Therefore, in the real Zn-Cu catalysts that have
many step sites, we think that the synergy by the Zn and Cu
step site can play a vital role in methanol synthesis.
Reference[1] Y. Shiozawa, T. Koitaya, K. Mukai, S. Yoshimoto, and J. Yoshinobu,
J. Chem. Phys. 152, 044703 (2020).
AuthorJ. Yoshinobu

The Structural Study on Microbial
Rhodopsins and the Characterizationof New Microbial Rhodopsin Families
Inoue Group
Rhodopsin is photo-receptive heptahelical transmembrane protein in which a retinal chromophore is covalently
bound to a conserved lysine residue in the seventh transmembrane helix (TM7), and animal and microbial rhodopsin
families are known so far. Animal rhodopsins are present
in animal retina to transfer visual signal to brain and arealso related to non-visual light sensing in various tissues.
Microbial rhodopsins show diverse functions: light-driven
ion pump, light-gated ion channel, phototactic sensor, lightdependent regulation of gene expression and enzyme, andso on. Both types of rhodopsins are being widely used in
optogenetics to control various cellular events, such as neuralactivity, gene expression, dynamic protein localization, andso on, by light.

Fig. 1. The x-ray crystallographic structure of HeR

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ISSP Activity Report 2019

Recently, we discovered the third class of rhodopsin,
heliorhodopsin (HeR), which is evolutionally distinct fromboth of microbial and animal rhodopsins. In 2019, we
reported the three-dimensional structure of HeR at atomic
level by the x-ray crystallographic analysis (Fig. 1) [1].
It revealed that HeR forms dimers and a fenestration ispresent near the β-ionone ring of the retinal chromophore.
The biochemical experiment suggested that this fenestration is used for the uptake of the retinal chromophore fromthe environment. This molecular character unique for HeR
is considered to be physiologically important for microorganisms having HeR without retinal synthetic genes.
Also, the bioinformatic analysis suggested that, while HeR
is widely distributed in many gram-positive bacteria, nogram-negative bacteria do not have HeR in their genomes.
Because many typical microbial rhodopsins are used bymany gram-negative bacteria, the absence of HeR in themis a highly unexpected fact suggesting that the physiological
function of HeR would be related to the structure of thecellular membrane of gram-positive bacteria without outermembranes. The study on the ultrafast photoisomerization
process of the retinal chromophore in HeR revealed that its
isomerization process is similar to those of typical microbial rhodopsins despite of considerably different amino acidresidues surrounding the chromophore. A convergent evolution may have occurred in typical microbial rhodopsins and
HeR to achieve efficient retinal isomerization with highquantum yields.
The three-dimensional atomic structure of Gloeobacterrhodopsin (GR) was solved by the x-ray crystallographic
analysis. The electron microscopic observation revealed that
GR exists as a pentamer, and the structural detail obtained inour study will provide new insights to understand the mechanism of oligomerization of membrane protein.
A new type of rhodopsin showing unique isomerization
process and microbial rhodopsin without retinal binding
lysine (Rh-noK) were also identified from bacteria [2]. The
former has a new type of amino acid residues in the TM3
consisting of threonine, alanine and threonine called the“TAT motif” at the position where typical proton pumping
rhodopsin has the DTD (aspartic acid-threonine-asparticacid) or DTE (aspartic acid-threonine-glutamic acid) motifs.
In the study of Rh-noK, we revealed that ca. 10% of 5,558

Fig. 2. The phylogenetic tree of microbial rhodopsins. The Rh-noK
sub-family is shown in cyan.

microbial rhodopsins do not have the lysine residue in TM7
which typically is used to bind the retinal chromophore bymaking a covalent Schiff base linkage (Fig. 2). A colored
protein was formed by introducing a lysine residue at thisposition, and, interestingly, additional introduction of an
aspartate functioning as a counterion to the protonatedretinal Schiff-base recovered the light-driven outward proton
pumping function. This suggests that the Rh-noK protein
was recently evolved from natural outward proton pumping
rhodopsin, and most of structural elements important for thepump function has been retained even after the lack of theretinal binding lysine and counterion aspartate. The physiological roles of TAT rhodopsin and Rh-noK have not been
revealed yet, and they will be investigated in the near future.
References[1] W. Shihoya, K. Inoue et al., Nature 574, 132 (2019).
[2] C. Kataoka, K. Inoue et al., J. Phys. Chem. Lett. 10, 5117 (2019).
Authors
K. Inoue, T. Nagata, and H. Yawo

Electrical Manipulation of a Topological
Antiferromagnetic State
Nakatsuji, Otani, and Miwa Groups
Recently, materials with nontrivial band topology haveattracted considerable attention due to their novel physicalproperties. One such example is a Weyl semimetal, in which
two non-degenerate bands linearly touch in momentum
space, forming gapless Weyl fermions with different
chiralities in a time-reversal-symmetry (TRS) or inversionsymmetry breaking state. These touching points or Weylnodes act as topologically protected, unit-strength monopoles
or antimonopoles of underlying Berry curvature such as alarge anomalous Hall effect (AHE) and chiral anomaly. The
electrical manipulation of these novel properties becomes
an important topic for developing new technologies utilizing
novel topological state. For this purpose, TRS-breaking or

Fig. 1. (a) Mn3Sn crystal structure and inverse triangular spin (ITS)
structure. The large blue and red spheres (small gray and black spheres)
represent Mn atoms (Sn atoms) at z = 0 and 1/2, respectively. The Mn
magnetic moments (light blue and pink cylindrical arrows) lie within
the kagome-layer with the AB-AB stacking sequence and form the
ITS structure at room temperature. The spin structure on the kagome
bilayers can be viewed as a ferroic ordering of a cluster magnetic
octupole. (b) Left: cluster magnetic octupole (orange cylindrical arrow)consisting of the six spins on the kagome bilayer. Right: schematic
distribution of the Weyl points near the Fermi energy in the momentum
space (kx-ky plane at kz = 0) for the magnetic structure shown in theleft-side figure. Red and blue spheres correspond to Weyl nodes, which
respectively act as sources (+) and drains (-) of the Berry curvature(green arrows). Inset: three-dimensional schematic picture of a pair of
Weyl nodes.

magnetic Weyl semimetals would be suitable owing to theirmagnetic texture. Moreover, given the prospects of antiferromagnetic (AF) spintronics for realizing high-density devices
with ultrafast operation [1], electrical manipulation of an AF
Weyl metal is ideal, but have not yet been reported. In thisstudy, we demonstrate the electrical switching of a topological AF state and its detection by AHE at room temperature
in a Weyl antiferromagnet Mn3Sn by using spin-orbit torque(SOT) switching method.
Mn3Sn has a hexagonal D019 structure with the ABABstacking sequence of a (0001)-kagome layer of Mn, andthe geometrical frustration leads to a three-sublattice
non-collinear AF ordering of Mn spins below the Néel
temperature TN ~ 430 K (Fig. 1(a)) [2]. The magnetic
octupole’s polarization direction determines the locationof Weyl nodes and the associated distribution of the Berrycurvature in the momentum space (Fig. 1(b) right). To
induce possible SOT switching in Mn3Sn, we prepared the
Mn 3Sn/nonmagnetic metal (NM = Pt, W, Cu) bilayer
devices. Figure 2(a) shows the schematic image of the
SOT switching in Mn3Sn/Pt bilayer devices. When an
electrical current flows into the Pt layer, a spin polarized current generated by the spin Hall effect of Pt
induces the SOT on the Mn 3Sn layer and causes theswitching of the polarization direction of the magnetic
octupole. The measurement configuration and optical
micrograph of the fabricated bilayer Hall bar devices
are shown in Fig. 2(b). In our study, we first perform themagnetic field switching of the Hall voltage VH by using
an out-of-plane magnetic field Hz with a read current of
0.2 mA. A clear hysteresis of V H with the zero-fieldchange of ΔVHfield (= VH(+Hz→0) − VH(−Hz→0)) is observed(Fig. 2(c)). To examine the possible SOT switching ofFig. 2. (a) Schematic image for the spin-orbit torque switching. The
spin-polarized current (green cylindrical arrows on yellow spheres)
generated in Pt exerts a spin-orbit torque, causing the switching of thepolarization axis of the cluster magnetic octupole (orange cylindricalarrow) in the polycrystalline Mn3Sn under a write current and a bias
field along the x-direction. (b) Measurement configuration and optical
micrograph of the fabricated Mn3Sn-nonmagnet bilayer Hall bar
devices. (c) Hall voltage VH vs. magnetic field along the z-direction Hz
for the Mn3Sn/Pt 7.2 nm device at room temperature. Inset: Schematic
figures illustrating the direction of the cluster magnetic octupole. (d)Hall voltage VH vs. write current Iwrite for the Pt 7.2 nm, Cu 5 nm, andW 7.2 nm devices at room temperature. The Hall voltage is normalized
by the zero-field Hall voltage |ΔVHfield| in the magnetic field dependence for each sample.

ISSP Activity Report 201915

Mn3Sn, we pass a 100 ms write-pulse current Iwrite along thex-direction; then, we wait for 600 ms after the pulse current
and measure VH with a 0.2 mA read current. Fig. 2(d) shows
VH as a function of Iwrite in Pt, W, and Cu devices. For the
NM = Pt (spin Hall angle θSH > 0), a clear negative (positive)
jump appeared in the Hall voltage under a positive (negative)
current larger than a critical threshold write-current Ic witha bias field Hx along the current direction x. The magnitudeof the jump reaches ~30 % of the total Hall voltage change|ΔVHfield | in the field sweep measurements. To confirm that
this switching of VH is related to the SOT from the spin
Hall effect in the NM layer, we prepared NM = W (θSH < 0)and Cu (θSH ~ 0) instead of Pt. For NM = W, the switchingpolarity is opposite to the Pt one, while for NM = Cu, there
is almost no hysteresis with the electrical current cycle. The
difference in switching polarity between Pt and W devices
and the absence of switching in Cu devices cannot be
accounted for by the Oersted field generated by the electricalcurrent but agree well with the sign of θSH of the NM layer.
These results demonstrate that SOT from the NM layer
induces the perpendicular switching of the AF domain andthus manipulates the direction of Weyl nodes.
In recent years, utilizing antiferromagnets in spintronics
devices have attracted significant attention as its vanishingsmall stray fields and much faster spin dynamics than ferromagnets [1]. Our electrical switching measurement of AF
Weyl metals is made by using the same protocol as the oneused for ferromagnetic metals [3,4]. Moreover, the switchingor critical write current density Jc in the NM layer is foundreasonably small. It is estimated to be 2 × 1011 A/m2 for
7.2 nm thick Pt and 5 × 1010 A/m2 for 7.2 nm thick W
devices, which are smaller than the original values reported
for the first observations of the electrical switching in
the NM/FM devices (Jc ~ 1012 A/m2) [3,4]. These results
indicate that topological antiferromagnets may replace ferromagnets in spintronics devices.
In summary, we demonstrated the electrical switchingof Weyl antiferromagnets Mn 3Sn by using Mn 3Sn/NM
bilayer devices. Our findings indicate that SOT switching isa useful tool for electrically manipulating the distribution of
Weyl points and Berry curvature in momentum space. Theseobservations may lead to further scientific and technologicaladvances in topological magnetism and antiferromagnetic
spintronics [5].
References[1] T. Jungwirth et al., Nat. Nanotechnol. 11, 231 (2016).
[2] S. Nakatsuji, N. Kiyohara, and T. Higo. Nature 527, 212 (2015).
[3] I. M. Miron et al., Nature 476, 189 (2011).
[4] L. Liu et al., Science 336, 555 (2012).
[5] H. Tsai, T. Higo, K. Kondou, T. Nomoto, A. Sakai, A. Kobayashi,
T. Nakano, K. Yakushiji, R. Arita, S. Miwa, Y. Otani, and S. Nakatsuji,
Nature 580, 608 (2020).

Large Transverse Thermoelectric Effect inIron-Based Binary Ferromagnets
Nakatsuji and Miwa Groups
Thermoelectricity, conversion of heat current into
electric energy, provides key technology for versatile energy
harvesting and heat current sensors. To date, the technology
has relied on the longitudinal thermoelectric response known
as the Seebeck effect. Its transverse counterpart in ferromagnets, the anomalous Nernst effect (ANE), has gained
significant attention, as it has a number of potential benefits[1,2]. For example, the transverse geometry of the Nernst
effect enables the efficient, large area and flexible coverageof a curved heat source (Fig. 1(a)). Moreover, the transverse
geometry is hypothetically better suited for thermoelectric conversion, as the Ettingshausen heat current should
support the Nernst voltage while the Peltier heat current may
suppress the Seebeck voltage [3]. However, the anomalous
Nernst effect is too small compared to the Seebeck effect forany thermoelectric application. Thus, it is essential to design
a new class of materials that exhibit a large ANE at zeromagnetic field.
To find candidate compounds efficiently, we carried out
a high-throughput calculation to screen materials without
synthesizing them first. Here we found two iron-based cubic
compounds Fe3X (where X is Ga or Al) as materials suitablefor designing such low-cost, flexible thermoelectric devices,reaching about 6 μVK-1 and 4 μVK-1 at room temperature,
respectively, close to the highest value reported so far. Our
successful fabrication of epitaxial Fe3Ga and Fe3Al thinfilms enables us to obtain a large ANE of about 4 μVK-1 and
2 μVK-1 at room temperature using an in-plane temperature gradient. Moreover, these Fe3Ga and Fe3Al films
have in-plane magnetization with a coercivity BC of about
40 Oe and 20 Oe, respectively, and exhibit a spontaneous
ANE at zero field (Fig. 1(b)) for the out-of-plane temperature gradient. These features enable us to design a much
simpler thermoelectric device than the conventional Seebeck
analogues.
The comparison between experiment and theory indicatesthat the Fermi energy tuning to the nodal web is the key
for the substantial enhancement in the transverse thermoelectric coefficient, reaching a value of about 5 AK-1m-1
with logarithmic temperature dependence. Figure 2(a)shows a schematic of the nodal web, a flat band structure
made of interconnected nodal lines. The Berry curvature

Authors

H. Tsai, T. Higo, K. Kondoua, T. Nomotob, A. Sakai, A. Kobayashi,
T. Nakanoc, K. Yakushijic, R. Aritaa, S. Miwa, Y. Otani, and S. Nakatsuji
aRIKEN CEMS
bUniversity of Tokyo
cAIST

Fig. 1. (a) Thermopiles based on the ANE. V, M, and ∆T is the voltage,
magnetization, and temperature difference, respectively. (b) Magnetic
field dependence of the Nernst voltage −Vyx for the thin films of
Fe3Ga, Fe3Al and α-Fe. The temperature gradient in the sample (MgO
substrate/Fe3Ga, Fe3Al, or α-Fe /MgO), ∇Tall, is monitored to be
3.0 Kmm-1. The temperature gradient in the Fe3Ga (Fe3Al) layer isestimated to be ∇T ≈ 0.86 K mm-1 (1.0 K mm-1).

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ISSP Activity Report 2019

Fig. 2. (a) Energy dispersion of the conduction band (red) and thevalence band (blue) around the L point on the BZ boundary for Fe3Ga.
The nodal web is made of nodal lines, shown by the yellow lines (thesame as in Fig. 2(b)), along which the flat portions of the conduction
and the valence bands touch around the L point. (b) Contour plot of the
Berry curvature Ωn,z of the lower-energy band n around the L point andnodal lines. The z direction is along [001] parallel to the magnetization.

is particularly enhanced at the momenta connecting theedge of the nodal web around the L point on the Brillouinzone boundary, extending over a quasi-2D area spanned by
the web (Fig. 2(b)). These results suggest that the strongly
enhanced Berry curvature occurs near the momenta originally belonging to the flat nodal web, such as the one aroundthe L point.
Our discovery of the significant spontaneous transverse thermoelectric effects indicates that two iron-based
compounds, Fe 3Ga and Fe 3Al, should be suitable fordesigning low-cost, flexible thermos electric generator byusing their thin-film form. It is vital to enhance the coercivity
further to achieve stable performance in daily use. Finally,
it would be an interesting future direction to look for anenhanced output by combining the ANE with the spin
Seebeck effect, both of which occur in the same transverse
geometry [4].
References[1] A. Sakai et al., Nat. Phys. 14, 1119 (2018).
[2] M. Ikhlas, T. Tomita et al., Nat. Phys. 13, 1085 (2017).
[3] M. Mizuguchi and S. Nakatsuji, Sci. Technol. Adv. Mater. 20, 262(2019).
[4] A. Sakai et al., Nature 581, 53 (2020).

curvature inherent to the linearly dispersing crossing points
between two electronic bands (i.e., the Weyl points) allows
for the emergence of surprisingly large anomalous transporteffects even in antiferromagnets or spin-liquid candidates.
While the WSM is earlier identified experimentally innonmagnetic materials with breaking inversion symmetry[1,2], the search for magnetic WSM states in strongly correlated systems remains challenging yet of great importance,
due to their excellent tunability and appealing potential for
innovative technological applications.
The earliest predicted magnetic WSM is the family of
pyrochlore iridates R2Ir2O7 (where R is a lanthanoid or
yttrium) [3], a 5d electron system featuring noncoplanar
spin configurations in both 5d and 4f electron sectors. The
5d series provides an ideal ground for realizing exotic
topological phases, owing to the comparable strength of
the spin-orbit interaction relative to the Coulomb repulsion, allowing the correlation physics to play a critical role.
Indeed, recent experiments identified Pr2Ir2O7, the metallic
end-member of the R2Ir2O7 family, as a Luttinger semimetal
comprising quadratic band touching of doubly degenerate valence and conduction bands at the Brillouin zone
center Γ near the Fermi level EF (Fig. 1a) [4]. Lattice strain
or magnetic field tuning of the Luttinger semimetal may
engender a rich topological phase diagram, and is considered
a promising route towards realization of a magnetic WSM[5,6].
Recent studies on Pr2Ir2O7 have focused on its bulk
properties, yet the difficulties of applying uniaxial strain on
bulk single crystals leave the magnetic WSM shrouded inmystery. In contrast, thin films allow for control over the
crystal growth orientation and lattice deformation via
compressive or tensile strain imposed by epitaxial latticemismatch with a substrate. Here, we report the transport
properties of our epitaxial Pr2Ir2O7 thin films, which provide
firm evidence for a magnetic WSM state induced by thetensile strain along the surface normal [111] direction [7].

Authors

A. Sakai, S. Minamia, T. Koretsuneb, T. Chen, T. Higo, Y. Wang,
T. Nomotoc, M. Hirayamad, S. Miwa, D. Nishio-Hamane, F. Ishiia,
R. Aritac,d, and S. Nakatsuji
aKanazawa University
bTohoku University
cThe University of Tokyo
dRIKEN CEMS

Strain-Induced Magnetic Weyl
Semimetal in an Epitaxial Thin
Film of a Luttinger Semimetal
Nakatsuji, Lippmaa, Katsumoto,and Kindo Groups
Strong electronic correlations serve as a central threadof highly unusual behaviors in quantum materials, ranging
from metal-insulator transitions to unconventional superconductivity. The interplay of correlated electron physics withrecently discovered novel topological phases establishes a
new, fascinating research direction that awaits a full exploration. A vital example of this kind is the magnetic Weyl
semimetal (WSM), in which the strongly enhanced BerryFig. 1. (a) Band structure of a Luttinger semimetal consisting of
quadratic band touching of 5d electrons at the Γ point near EF (b)Schematic for experimental configurations of magnetotransportmeasurements. (c) Temperature dependence of the spontaneous Hall
resistivity. (d) Magnetoresistance curves as a function of the magnetic
field B measured at 2 K for B || I and B ⊥ I configurations. The solidand dotted lines are up and down sweeps of B, respectively. The
difference between the two curves arises from the chiral anomaly andindicates that the film is in the Weyl semimetal state.

ISSP Activity Report 201917

Fig. 2. (a) Schematic for the experimental configuration of the planar
Hall effect measurements. (b) and (c) Angle dependence of longitudinaland planar Hall resistivities, respectively, obtained at 70K and 9T

Using strained Pr2Ir2O7 thin films, we observed a zerofield Hall effect persisting up to about 50K without detectable spontaneous magnetization (Fig.1c). This onset temperature of the spontaneous Hall effect is much higher than thevalue (~ 1.5K) observed in bulk single crystals and is nearly
two orders of magnitude higher than the exchange coupling(J ~ 0.7K) of Pr 4f moments [8], indicating the breaking oftime-reversal symmetry induced by the magnetic order of
Ir 5d electrons. Thus, the condition for realizing a magnetic
WSM state is fulfilled in the strained thin film. Moreover, we
identified a negative contribution to the magnetoresistancespecific to the chiral anomaly (Fig. 1 b and d) and the planar
Hall effect (Fig. 2); both phenomena are considered thefingerprints of Weyl points lying close to EF [9, 10, 11].
In summary, we succeeded in synthesizing epitaxial thinfilms of Pr2Ir2O7 and revealed key transport signatures of the
WSM under strain tuning. The discovery of strain-induced
magnetic Weyl semimetal state in pyrochlore iridates thinfilms paves a new avenue to explore topological phases instrongly correlated materials.
References[1] B. Q. Lv et al., Phys. Rev. X 5, 031013 (2015).
[2] S.-Y. Xu et al., Science 349, 613 (2015).
[3] X. Wan et al., Phys. Rev. B 83, 205101 (2011).
[4] B. Cheng, T. Ohtsuki et al., Nat. Commun. 8, 2097 (2017).
[5] E.-G. Moon et al., Phys. Rev. Lett. 111, 206401 (2013).
[6] T. Kondo et al., Nat. Commun. 6, 10042 (2015).
[7] T. Ohtsuki et al., Proc. Natl. Acad. Sci. U.S.A. 116, 8803 (2019).
[8] Y. Machida et al., Nature 463, 210 (2010).
[9] D. T. Son and B. Z. Spivak, Phys. Rev. B 88, 104412 (2013).
[10] A. A. Burkov, Phys. Rev. B 96, 041110(R) (2017).
[11] S. Nandy et al., Phys. Rev. Lett. 119, 176804 (2017).

Fig. 1. (a) Temperature dependence of the electric resistivity (left axis)
and 4f-electron contribution (right axis) of PrV2Al20 under various
magnetic fields along [110]. (b) Temperature dependence of the longitudinal magnetoresistance MR of PrV2Al20.

result of the competing interplay between the magnetic
Kondo effect and the Ruderman-Kittle-Kasuya-Yosida(RKKY) interaction among local dipolar moments. Such
NFL often appears at the boundary of magnetic instability
and is attributed to quantum criticality.
Heavy fermion metals hosting multipolar local
moments entail a new route to exotic spin-orbital entangled
quantum phases. In the case of quadrupolar systems, theconventional Kondo effect is replaced by a two-channel
Kondo mechanism, known as the quadrupolar Kondo effect.
Here Kondo entanglement takes place between the quadrupolar moments of f-electrons and the orbital fluctuationsof the conduction electrons, while the conduction electron
spins offer two separated scattering channels. This effectis considered a key mechanism behind the orbital-driven
NFL behavior and quantum critical phenomena. The heavy
fermion superconductor PrV2Al20 possesses a nonmagnetic
ground-state doublet, featuring both electric quadrupoles

Authors
T. Ohtsuki, Z. Tian, A. Endo, M. Halim, S. Katsumoto, Y. Kohama,
K. Kindo, M. Lippmaa, and S. Nakatsuji

Evidence for the Quadrupolar Kondo
Effect in the Heavy Fermion
Superconductor PrV2Al20
Nakatsuji GroupThe non-Fermi liquid (NFL) phase holds abiding fascination owing to its prime connections with unconventional
superconductivity and other intriguing emergent quantum
states in itinerant electron systems. Magnetic heavy-fermion
metals offer some prototypical examples of the NFL as a

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ISSP Activity Report 2019

Fig. 2. Universal scaling behavior of (a) the 4f-electron contribution to
the resistivity and of (b) the magnetic susceptibility measured under a[110] magnetic field.

and magnetic octupoles. It exhibits novel NFL behavior
above the antiferroquadrupolar ordering transition at ambient−−pressure, with ~ √ T dependent resistivity and ~ −√ T magnetic
susceptibility. The relation of this NFL phase with thequadrupolar Kondo effect is yet to be explored.
We report a comprehensive study of the NFL phenomena
in PrV2Al20 single crystals based on magnetoresistance (MR),magnetic susceptibility, and specific heat measurements
obtained under a [110] magnetic field. Upon entering the
NFL regime, we observed a universal scaling behavior
expected for the quadrupolar Kondo lattice, which reveals
the vital role of the quadrupolar Kondo effect in shaping the
NFL phase of PrV2Al20. Deviations from this scaling relation
occur below about 8 K, accompanied by a negative MR anda power-law divergent specific heat. Such behavior signifies
the emergence of an anomalous low-temperature state,
which is likely driven by heavy-fermion coherence in thequadrupolar Kondo lattice or critical quantum fluctuations ofmultipolar moments.
References[1] P. Gegenwart, Q. Si, and F. Steglich, Nat. Phys. 4, 186 (2008).
[2] D. L. Cox and A. Zawadowski, Adv. Phys. 47, 599 (1998).
[3] A. Sakai and S. Nakatsuji, J. Phys. Soc. Jpn. 80, 063701 (2011).
[4] M. Fu et al., J. Phys. Soc. Jpn. 89, 013704 (2020).
Authors
M. Fu, A. Sakai, N. Sogabe, M. Tsujimoto, Y. Matsumotoa, and
S. Nakatsuji
aMax Planck Institute for Solid State Research

Orbital-Driven Giant Anisotropic
Magnetoresistance in the Quadrupolar
Heavy Fermion Superconductor PrV2Al20
Nakatsuji and Sakakibara Groups
The quest for a mechanism that realizes significant
transport anomalies in non-ferromagnetic materials may
spark a breakthrough in developing ultrafast and energyefficient memory devices [1,2]. An example of such transport
anomaly is anisotropic magnetoresistance (AMR), definedas the difference between the resistance with current applied
parallel and perpendicular to the ordered spin direction.
To date, however, the AMR effect found in antiferromagnetic materials is limited to a small value of 1% - 2% [3,4].
Rearrangement of electron orbitals may hold the key tofurther enhancing the AMR in non-ferromagnetic systems, as
it should generate anisotropy in the electronic band structure,
thereby inducing dramatic effects on the transport properties.
A promising discovery along this line is the strongly aniso-

tropic magnetoresistance appearing within the nematic orderphase in iron-based superconductors.
Here, we focus on a cubic heavy fermion compound
PrV2Al20. A unique feature of this material is its nonmagnetic Γ3 ground-state doublet, in which the magnetic dipole
moment is absent, whereas the quadrupole and octupole
moments are active [5], offering an ideal stage for investigating transport phenomena driven solely by electron
orbitals. The strong hybridization of these multipolar
moments with conduction electrons leads to a rich phase
diagram involving a two-stage multipolar order below
0.6–0.7K, non-Fermi-liquid behavior driven by multipolar Kondo effect, and heavy-fermion superconductivity
below about 0.05K at ambient pressure [6]. Under a [100]magnetic field, earlier magnetization measurements revealed
a high-field phase lying between ~11 – 24T below about
1K [7] (Fig. 1a). This high-field phase is likely the result of
rearrangement of the quadrupole moments and therefore is apromising place to explore anisotropic transport properties.
We carried out magnetoresistance measurements underhigh magnetic fields up to 31.4T at the National High
Magnetic Field Laboratory, Tallahassee, USA [8]. Under a[100] magnetic field, we found that, on entering the highfield phase at about 12 T, the rearrangement of quadrupolar
moments yields a sharp jump in the magnetoresistance(ΔMR~100%), with a substantial AMR effect of about 30%(Fig. 1b). This feature signifies a Fermi surface reconstruction within the high-field quadrupolar ordered phase, owing
to the strong hybridization between the local quadrupolar
moment and the conduction electrons. This giant anisotropic
magnetoresistance induced by quadrupole rearrangement
may form the basis of conceptually new memories and information storage using multipolar states.
References[1] S. Nakatsuji, N. Kiyohara, and T. Higo, Nature 527, 212 (2015).
[2] T. Jungwirth et al., Nat. Nanotechnol. 11, 231 (2016).
[3] D. Kriegner et al., Nat. Commun. 7, 11623 (2016).
[4] X. Marti et al., Nat. Mater. 13, 367 (2014).
[5] A. Sakai and S. Nakatsuji, J. Phys. Soc. Jpn. 80, 063701 (2011).
[6] M. Tsujimoto et al., Phys. Rev. Lett. 113, 267001 (2014).
[7] Y. Shimura et al., J. Phys. Soc. Jpn. 82, 043705 (2013).
[8] Y. Shimura et al., Phys. Rev. Lett. 122, 256601 (2019).
Authors
Y. Shimuraa, Q. Zhangb, B. Zengb, D. Rhodesb, R. Schönemannb,
M. Tsujimoto, Y. Matsumotoc, A. Sakai, T. Sakakibara, K. Arakid,
W. Zhengb, Q. Zhoub, L. Balicasb, and S. Nakatsuji
aHiroshima University
bNational High Magnetic Field Laboratory
cMax Planck Institute for Solid State ResearchdNational Defense Academy

Magnetic Field Induced Quantum Phases ina Tensor Network Study of Kitaev Magnets
Kawashima Group

Fig. 1. (a) Temperature-magnetic field (T-B) phase diagram for a [100]magnetic field obtained from the magnetoresistance data. (b) The anisotropic magnetoresistance ratio as a function of magnetic field measured
at 0.45K and 1.6K

Tensor network (TN) is a useful concept in various fields,
not only in the condensed matter theory, but also in data
science and machine learning. Even in the condensed mattertheory alone, the application of the TN concept is multi-fold.
In variational principles calculation, the TN is used as a new
type of variational wave function. In the real-space renormalization group (RG) theory, it serves as a natural representation of a renormalized system. In the pure mathematicalphysics, it is used as a new language for discussing the

ISSP Activity Report 201919

topological nature of the quantum states.
In our previous study [Lee, Kaneko, Okubo andKawashima: Phys. Rev. Lett. 123, 087203 (2019)], we
studied the Kitaev model by the TN representation. We
proposed a new wave function that is extremely simple in the
TN representation but still shares many essential properties
with the ground state of the Kitaev model, such as the quasilong-range correlation, the short-range magnetic correlation, the flux-free property, the Z2 gauge structure, and the
2D Ising universality. We call this state the "loop gas state"because of its mathematical equivalence to the loop gas
model, one of the standard and solvable statistical physicalmodels. We showed that the loop gas state is adiabaticallyconnected to the ground state of the Kitaev model, indicating
a similar role to the AKLT state for the S = 1 AFH chain.
We then extended our method to several other models:S = 1 Kitaev model, and Kitaev-Gamma model. In this study,
we studied field-induced quantum phases in the theoreticalmodel of a real candidate material of Kitaev magnets, i.e.,
α-RuCl3. For this compound, there was an experimental
discovery of the half quantized thermal Hall conductivity,
which initiated a series of theoretical investigations aiming
at finding a concrete connection between the observed
quantum phenomena and the theoretical developments of
the Kitaev spin liquid. Our TN calculation suggested that afield-induced phase appears between the low field zig-zag
magnetic order and the high field polarized state. We foundthat the chiral Kitaev spin liquid occupies an area in thephase diagram, smaller than predicted by other groups.
Specifically, we studied the K-Γ-Γ' model on the honeycomb lattice represented by the following Hamiltonian,αij

H = ∑ H ij

may imply the importance of the thermodynamic limit. The
tensor network method provides us results for infinite system
in contrast to the methods used in the previous ones. At zero
field, there is a transition from KSL to a FM
_ _ (ferromagnetic) phase where spins are aligned in the [111] direction.
However, with a very weak magnetic field (h = 0.005), theFM phase disappears, and a direct phase transition from KSL
to ZZ (zigzag magnetic ordered) occurs. With increasing themagnetic field, the transition from KSL to the P (polarized)
phase occurs at a finite h, where spins start aligning in the[111]-direction.
Apart from the KSL phase, we discovered two
non-magnetic states, NP1 and NP2. These phases arecharacterized by spontaneously-broken 120-degree-latticerotational symmetry. When the magnetic field is tilted sothat the lattice-rotational symmetry is broken by the Hamiltonian, we found that the phase transition between the KSL
and NP2 is continuous in spite that both phases have thesame symmetry. This may indicate the non-trivial topologicalnature of the NP2 phase, which should be clarified in the
future study.
Reference[1] H.-Y. Lee, R. Kaneko, L. E. Chern, T. Okubo, Y. Yamaji,
N. Kawashima, and Y. B. Kim, Nature Communications 11, 1639
(2020)
Authors
H.-Y. Lee a, R. Kaneko b, L. E. Chern c, T. Okubo d, Y. Yamaji d,N. Kawashima, and Y. B. Kimce
aISSP and Korea University
bISSP and Kindai University
cUniversity of Toronto
dThe University of Tokyo
ePerimeter Institute

ij

α h
T α
H ij = −∙(S
i + Sj) + S i G Sj
3

where αij = x,y,z depending on the direction of the bond (ij).
The magnetic field is along the [111] direction. The matrix
Gα characterizes the two-body anisotropic interaction, e.g,
for α = z,
⎛ 0 Γ Γʹ ⎞Gz ≡ ⎜ Γ 0 Γʹ ⎜⎝ Γʹ Γʹ K ⎠The matrices for other directions are defined similarly.
In Fig. 1, the obtained phase diagram is presented. The
KSL ground state survives only in a small corner of thephase diagram. It disagrees with the previous results obtainedby 24-site exact diagonalization and DMRG studies, whichsuggested a largely extended KSL phase. The discrepancy

Fig. 1. (a) The magnetization and (b) the flux expectation value of theK-Γ-Γ' model at Γ'= - 0.03. Here "KSL" stands for the chiral Kitaev
spin liquid, "P" for a spin-polarized phase, and "NP1" and "NP2" fornematic paramagnet phase. The red solid line at h = 0 denotes a ferromagnetic phase.

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ISSP Activity Report 2019

Quantum Criticality of Valence
Transition for the Antiferromagnetic
Compound EuCu2Ge2 under Pressure
Uwatoko Group
Most Eu compounds order magnetically because of adivalent electronic state Eu2+. And, valence instability often
occurs in Eu compounds, from the divalent electronic stateof Eu2+ at high temperatures to the nearly nonmagnetic
electronic state Eu3+ at low temperatures, upon changing themagnetic field and pressure. These compounds can be used
to construct a conventional pressure phase diagram with very
similar to the Doniach phase diagram for the Ce compounds.
Recently, chemical- and high-pressure measurements havebeen carried out on single crystals of EuCu2(SixGe1-x)2 with
the ThCr2Si2-type tetragonal structure, which undergoes two
successive transitions at TN ~ 15 K and T'N ~ 9 K on x = 0,
and no magnetic orderings on x = 1, at ambient pressure. TN
slightly increases with increasing x and starts decreasing at
x = 0.5. and TN disappears around x ~ 0.7, revealing a mixedvalence or valence-fluctuating state.
In this report, we present the results of electrical resistivity measurements under pressure that revealed a new
aspect of the quantum criticality on Eu valence transition[1].
Figure 1 shows the temperature dependence of theelectrical resistivity ρ of EuCu2Ge2 under several pressures.
With increasing pressure, the resistivity at room temperature
increases because the c - f hybridization between conduction electrons and 4f electrons is enhanced. TN substantiallythe generalized Kadowaki-Woods plot, was about 510 mJ/(mol K2), suggesting that the effective mass of the quasiparticles is highly enhanced around Pc. From the analysisof the pressure effect on the exponent n of the power law
dependence of the resistivity: ρmag = ρmag0 + BTn, the fit of
the power law to the resistivity data provides valuable information on the pressure dependences of the exponent n of
EuCu2Ge2. It is predicted that n reaches 1.5 for the AF-QCP,
while it reaches 1 for the QCP of the valence transition. Inset
of Fig. 2 shows the pressure dependence of exponent n.
In the magnetic region n is larger than the Fermi liquidvalue n = 2, probably due to electron-magnon scattering.
Approaching Pc, the exponent n decreases as a functionof pressure and approaches n = 1. It suggests that the casecan be explained as QCP of the valence transition while thescenario based on critical AF-QCP cannot be applied to thepresent case [1]. This is the first observation of this phenomenon among the Eu compounds.
Reference

ˉ nuki,[1] J. Gouchi, K. Miyake, W. Iha, M. Hedo, T. Nakama, Y. O
and Y. Uwatoko, J. Phys. Soc. Jpn. 89, 053703 (2020).
Fig. 1. Temperature dependence of electrical resistivity in EuCu2Ge2
under several pressures together with the data for YCu2Si2 as a reference of the phonon parts of EuCu2Ge2. The inset shows the tetragonal
crystal structure of EuCu2Ge2.

increases from 15 K and becomes maximum at about 27
K at 6.2 GPa and then it is unclear in a wide temperature region. These results suggest that the valence of Eu
increases continuously from nearly divalent to trivalent withincreasing pressure. The resistivity at 6.5 GPa indicates noclear magnetic ordering and is typical for a moderate heavyfermion state. Tmax remains up to 6.5 GPa and shifts tohigher temperatures with further increasing pressure.
Figure 2 shows the P vs Néel temperature TN phase
diagram of EuCu2Ge2. With increasing pressure, TN substantially increases from 15 K and becomes maximum at about
27 K at 6.2 GPa. The resistivity at 6.5 GPa indicates noclear magnetic ordering. Note that T'N disappears rapidly
under pressure. In the present case, the Neel temperature
became zero abruptly at around 6.5 GPa. This suggeststhat the valence of Eu increased continuously up to 6.2
GPa, and then the quantum critical point(QCP) of thevalence transition arises abruptly at around Pc = 6.5 GPa.
The electronic specific heat coefficient, estimated from

Fig. 2. Pressure-Néel temperature phase diagram in EuCu2Ge2. The
inset shows pressure dependence of exponent n of the power law ρmag =ρmag0 + BTn of the magnetic resistivity at 0.05 K.

Authors
ˉ nukib, and
J. Gouchi, K. Miyakea, W. Ihab, M. Hedob, T. Nakamab, Y. O
Y. Uwatoko
aOsaka University
bUniversity of the Ryukyus

Kármán-Vortex Cavitation behind
Circular-Cylinder Arrays
Noguchi Group
Cavitation is a phenomenon in which bubbles are generated by local pressure changes in a liquid flow. Since cavitation has adverse effects on fluid machinery such as performance degradation, vibration and noise, and erosion, theelucidation of its mechanism is of great engineering importance. Numerically, cavitation has been mainly studied bysimulations based on the Navier–Stokes equation. However,it requires a bubble seed to simulate a vapor phase so thatit cannot treat the cavitation inception. Here, we directly
simulated the cavitation using molecular dynamics (MD) that

Fig. 1. Snapshots of density (left panels) and vorticity (right panels)
fields. The black circles in the figure represent cylinders. At the hightemperature, T = 2, Kármán vortex is formed without bubble generation. At the lower temperatures, cavitation occurs. A gas phase (thelow-density region in blue color) appears behind the cylinders.

ISSP Activity Report 201921

does not require the assumption of a phase transition modelor an equation of state for the bubble generation.
We employed Lennard-Jones fluids around periodicallyaligned side-by-side cylindrical objects at Reynolds number
Re~100. As shown in the top panels in Fig. 1, a Newtonian
fluid exhibits a Kármán vortex, in which vortexes are periodically generated behind the objects. The neighboring Kármán
vortex is synchronized in the antiphase. This synchronization
amplifies the vibrations acting on the cylinder. We decrease
the temperature to observe the cavitation. At the temperatures
T = 1.3 and 1.25, bubbles are generated in conjunction withthe shedding cycle of the Kármán vortex (the middle panels
in Fig. 1). The Kármán vortex remains synchronized in theanti-phase as in the non-cavitating flow. As the temperature
is further reduced to T = 1.2, the gas-phase region behindthe cylinder is further expanded, and the upper and lower
Kármán vortices become asymmetric (the bottom panels
in Fig. 1). This asymmetric structure is switched by a long
period of time. A similar dynamics is seen at more closely
packed cylindrical arrays in a Newtonian fluid. Thus, thebubbles give an effective increase in the cylindrical diameter.
The change in the vortex structure alters the vibrations
excited by the vortex. Because the generated bubbles inhibit
the propagation of the vibration associated with the ejectionof the vortex, the vibration amplitude decreases and eventually disappears as the cavitation develops.
In summary, the molecular-scale analysis reveals thatbubbles generated near the cylinder significantly change theproperties of the lift and flow fields.
Reference[1] Y. Asano, H. Watanabe, and H. Noguchi, J. Chem. Phys. 152,
034501 (2020).
Authors
Y. Asano, H. Watanabea, and H. Noguchi
aKeio University

Highly Homogeneous Gel without
Spatial Heterogeneity
Shibayama Group
Fabrication of ordered nanostructure is a crucial stepin a wide range of fields, although the typical size of theseobjects is still limited to a scale of µm3 even with current
technologies. Polymer gels are a familiar soft material
consisting of a nanoporous three-dimensional network thatis readily prepared in a large scale, in principle unlimited.
However, application of gels as a nanostructured object isobstructed by the fact that gel networks inevitably have asignificant level of defects including dangling ends, loops,
entanglements, and nonuniform pore sizes, as a result of
the fully stochastic gelation reaction. Numerous attempts
have been made to remove these defects from polymer gels,
including by synthesizing them from monodisperse polymer
chains, by using a relatively uniform cross-linking process
such as a photoreaction, by limiting unfavorable intramolecular reactions via the A-B type cross-coupling of starpolymers, and even by cross-linking polymer chains withmovable cross-linkers. Nevertheless, discernible signs ofspatial defects have been persistently observed in gels. Gels
have been believed to be inherently dis-ordered as a result of
the stochastic reaction.

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ISSP Activity Report 2019

Fig. 1. Illustration of synthesis scheme of highly homogeneous gel via
bond percolation. Four-armed star polymer units were dissolved in agood solvent at a concentration much higher than the chain overlapping limit of the polymers. Small crosslinkers were added into thepolymer solution. The crosslinkers gradually connect the star polymers
and eventually percolate the system. Because there is almost no spatial
defect in this polymer gel, the transparency of this material is extremelyhigh.

In this study, we broke this preconception: we present a
simple but yet universal scheme to fabricate polymer gelswith a highly ordered network. Our strategy is to bring ageometric constraint into the pregel solution so that the
space is always uniformly filled with the starting polymer
units throughout the gelation reaction (Fig. 1). This gelation
framework is known as “bond-percolation” in the classicalpercolation theory. The spatial and temporal heterogeneityof the synthesized gel network is investigated in the Fourier
space by using scattering techniques. Our gel did not show
any signatures of heterogeneity: no static laser speckles(Fig. 2), no anomalous small angle scattering, and fully
ergodic concentration fluctuations (Fig. 3) and ideal rubber
elasticity were observed. These results are completely
different from the widely accepted picture of gels. Because
both the spatial and temporal correlations of polymer chainsin our gels are identical to those of non-crosslinked pre-gel
solutions, we cannot even determine the physical state (sol orgel) of our sample by scattering techniques.
Gels have often been discussed in analogy with glass
because both gels and glass have a highly disordered structure. However, our results suggest that the bond percolation
gel is more like a crystal than glass because almost identicalstar polymers are closely packed in the space and no spatial
defects were detected. The Bragg peaks of the neighboring
polymer units were not observed in this gel because thepolymer chains can fluctuate much more than atoms in the
crystals. This fluctuation of the polymer chains would leadto substantial blurring of the observable correlation between
chains.
The simplicity of our gel preparation scheme will enable
us to synthesize homogeneous gels with highly ordered
network from a variety of polymers with different chemical
structures and functionalities (e.g. polydimethylsiloxane,
poly(acrylic acid), and poly(N-isopropylacrylamide)), which
will open the door to a wide range of new applications.

Fig. 2. Static laser speckle test to visualize the spatial defects in thegels synthesized via the bond percolation and conventional scheme. A
coherent laser beam was directed to the gel samples and the scattered
light was collected using an EMCCD camera. Each image was accumulated for 30 sec to obtain a time-averaged intensity. The bright spots(static laser speckles) in the images denote the static interference fromthe heterogeneous structures in the gels.

Fig. 3. Intensity time correlation function of the highly homogeneous
gel measured with dynamic light scattering at 100 randomly chosen
sample positions. All the intensity correlation functions well overlap,
indicating the high temporal homogeneity in this gel. The calculatedensemble-averaged intensity correlation function were in perfectconsistence with the individual local correlation function, suggesting
the ergodic concentration fluctuations of polymer chains in the highly
homogeneous gel.
Reference[1] X. Li, S. Nakagawa, Y. Tsuji, N. Watanabe, and M. Shibayama,

Science Advances. 5, eaax8647 (2019).
Authors
X. Li and M. Shibayama

Low-energy Excitations ofGlassy Carbon Tetrachloride
Yamamuro Group
There remain many unsolved problems in physicalproperties of glasses. One of the most important problems is
the low-energy excitations (LEE) characteristic to glasses.
A broad excitation peak appears around 2-5 meV in mostof Raman and inelastic neutron scattering (INS) spectra ofglasses. This peak is usually called “boson peak” since thetemperature dependence of the peak intensity is scaled wellby Bose factors. This peak is basically due to a local excitation since the peak position does not depends on momentum
transfer Q. Another interesting phenomenon is the phonon
dispersion which has been observed in network glasses [1].
It seems strange that the glasses have phonon dispersion
relations since they do not have periodicity. Nevertheless,broad dispersion-like excitations actually exist on dynamic
structure factor S(Q,E) planes of glasses. The origins of
the above phenomena should be associated with disordered(non-periodic) but locally-ordered structures of glasses.
However, their microscopic mechanisms are still unknown.
An essential approach to the LEE problems is the INS
study of molecular glasses with simple structures. The study
enables us to make direct comparison with the results ofvarious theoretical and computer simulation studies. Vitrification of simple molecules is not easy owing to their prompt
crystallization on cooling. Hence we utilize the vapor-deposition (VD) technique whose cooling rate is estimated to be
more than 107 Ks-1.
We have measured the INS spectra of VD carbon tetrachloride (CCl4) glass on AMATERAS, J-PARC. Fig. 1(a)Fig. 1. (a) Inelastic neutron scattering spectra of two glassy and one
crystalline states of CCl4 at 6 K. (b) Q dependence of the boson peakintensity integrated over E = 1.5–3.5 meV. Structure factor S(Q) of
glassy CCl4 is also plotted.

shows the S(Q,E) data in the boson peak energy region. A
clear boson peak appeared at around 2.5 meV in the glassy
state while a sharper peak, which corresponds to the Debye
cut-off of the acoustic phonon, at 4.5 meV in the crystalline
state. The annealing at 50 K slightly reduced the intensityof the boson peak in the lower-energy side as observed in
VD molecular glasses [2]. Fig. 1(b) gives the Q dependenceof the boson peak intensity. The intensity has a clear humpat 2.3 Å-1 and 3.4 Å-1 which coincides with the second andthird peak positions in S(Q). This is a similar Q dependence

Fig. 2. S(Q,E)/Q2 color contour map of the glassy CCl4 data at 6 Kfrom which normal phonon contribution proportional to Q2 has been
subtracted in advance.

ISSP Activity Report 201923

to that of the boson peak of SiO2 glass [3]. The phenomenon
is roughly explained by a coupled rotation model of the SiO4
tetrahedral unit. Fig. 3 shows the S(Q,E)/Q2 color contour
map of the data in which normal phonon contribution
proportional to Q2 has been subtracted. It is of interest that,as shown by red curves, the phonon excitation has a clear
dispersion relation starting at Q = 2.3 Å-1 where the boson
peak intensity has a maximum and S(Q) exhibits the second
peak. This is the first observation of the dispersion-like
excitation in molecular glasses. We are now trying a normal
mode analysis based on the local structure determined by thereverse Monte Carlo analysis on the X-ray diffraction data
which was obtained in SPring-8.
References[1] M. Arai, Y. Inamura, T. Otomo, N. Kitamura, S. M. Bennington, and
A. C. Hannon, Physica B 263, 268 (1999).
[2] O. Yamamuro, I. Tsukushi, T. Matsuo, K. Takeda, T. Kanaya, and
K. Kaji, J. Chem. Phys. 106, 2997 (1997).
[3] U. Buchenau, M. Prager, N. Nücker. A. J. Dianoux, N. Ahmad, andW. A. Phillips, Phys. Rev. B 34, 5665 (1986).
Authors
X. Wu, M. Kofua, Y. Mizuno, H. Akiba, T. Kikuchia, S. Kawamuraa,
K. Nakajimaa, and O. Yamamuro
aJ-PARC, JAEA

Novel Excitations near Quantum
Criticality in Geometrically Frustrated
Antiferromagnet CsFeCl3
Masuda GroupFor understanding condensed matter, the investigation of
the collective excitation in low energy range is indispensable.
According to the quantum field theory, the excitation in thesystem with spontaneously symmetry broking is characterized by phase and amplitude fluctuations of order parameters. The former is known as the Nambu-Goldstone (NG)mode, and the latter is called as the amplitude mode. Even
though these modes are usually separated, they are hybridized under some conditions, and interesting phenomena are
induced; for example in a crystal lattice system, acoustic
phonon (NG mode) and optical phonon (amplitude mode)
are hybridized through anharmonic terms in a thermoelectricmaterial PbTe, which renormalizes the phonon spectrum andleads to low thermal conductivity and high figure of meritin thermoelectric property [1]. Such a hybridization effectcould exist in other types of elementary excitations, however,no research has been reported to our knowledge partiallybecause longitudinal mode itself is not trivial.
Spin S = 1 easy-plane antiferromagnet is one of theFig. 1. Schematic diagram of the S = 1 easy-plane antiferromagnet.

In the ordered state, the doublet excited states |±1> splits into |L>and |T>. Here, the former and latter have longitudinal and transverse fluctuations, respectively.

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ISSP Activity Report 2019

Fig. 2. Inelastic neutron scattering spectra. The spectra obtained at achopper spectrometer under (A) 0.0 GPa at 6 K, (B) 0.3 GPa at 2.7 K
and (C) 1.4 GPa at 0.9 K sliced by the energy transfer - wave vector(ħω – q) plane for q = (-k, 2k, 0). The yellow circles, squares, and red
diamonds are the peak positions of the excitations obtained from theconstant-q scans using a triple-axis spectrometer. The solid yellow
curves are the dispersions calculated by ESW. Calculated neutron crosssection by the ESW under (D) 1.4 GPa at 0 K. Calculated neutron
cross-section in the absence of the off-diagonal elements under (E) 1.4
GPa at 0 K. The black and red solid curves in (D) and (E) are gaplessand gapped modes, respectively.

prototypical quantum spin systems that allows to explore thequantum phase transition (QPT) [2]. When the anisotropy
D is large, the ground state is a quantum disordered (QD)
singlet as shown in Fig. 1 left panel. When D is small andthe exchange interaction is large, the ground state is magnetically long-range ordered state. A remarkable feature in therenormalized energy scheme in Fig. 1 right panel is that thesecond excited state can be excited only by the longitudinalcomponent of spin operator S||, meaning that the longitudinalmode is allowed in the system. Because the geometricalfrustration in magnets could induce the hybridization of thetransverse (T) and longitudinal (L) modes, spin S = 1 easyplane antiferromagnet having geometrically frustrated latticeis the best playground for the research of hybridized modes
in magnetic material.
CsFeCl3 is the S = 1 easy-plane triangular antiferromagnet. The inelastic neutron scattering (INS) study atambient pressure revealed that the ferromagnetic chains
along the crystallographic c axis are antiferromagneticallycoupled in the ab plane [3]. The ground state is the QD statebecause of large single-ion anisotropy. The magnetic susceptibility measurement under pressures exhibited a pressureinduced magnetic order above a critical pressure of about
0.9 GPa [4]. Owing to the strong easy-plane anisotropy,
the ordered moment aligns in the ab plane; the neutron
diffraction evidenced the noncollinear 120° structure in the
LRO phase [5]. CsFeCl3 is, thus, a promising host for thepressure-induced QPT in the geometrically frustrated lattice.
In 2019 our group reported a new hybridization of the phaseand amplitude fluctuations of the order parameter near QCP
in CsFeCl3 [6].
The INS spectrum measured at 0.0 GPa by using chopper
spectrometer in Fig. 2A exhibits a single dispersive excitation with the energy gap of 0.6 meV at the wave vectors
q = (-k, 2k, 0) for k = 1/3 and 2/3. The energy gap at 0.3 GPain Fig. 2B becomes softened when approaching the orderedstate. A qualitatively different spectrum is observed in theordered state at 1.4 GP in Fig. 2C. A well-defined gaplessexcitation emerges at k = 1/3 and 2/3 and another dispersive excitation are observed in the higher energy range.
The INS spectra were collected also by using a triple-axis
spectrometer in order to cover wide ħω – q range, and theextracted peak energies are overplotted by open symbols in
Figs 2A-2C. At 1.4 GPa, the spectral lineshape at k = 5/6
was reproduced by double Lorentzians with broad widths
which is reflected by large errorbars. The dispersion relations
calculated by the extended spin-wave theory (ESW) [7]
are indicated by the solid yellow curves. The calculationis consistent with the experiment both in the QD and LRO
phases.
In ESW calculation one can notice that noncollinearityof the magnetic structure makes off-diagonal elements in the
Hamiltonian nonzero, leading to the hybridization of L and
T modes in one-magnon process. To understand the effectsof LT-hybridization, we demonstrate the INS spectra after
dropping the off-diagonal element. The results are shownin Figs. 2E, where the black-gapless (red-gapped) modes
are pure transverse (longitudinal) modes in this case. The
result is inconsistent with the experiment in Fig. 2C. When
LT-hybridization is taken into account, the off-diagonal
elements lead to anticross of the modes at k~ 5/6 in Fig. 2D,
and novel magnetic excitations are formed; both gaplessand gapped modes are accompanied by strong longitudinal
and transverse fluctuations. The result is consistent with theexperiment, and, thus, the LT-hybridization plays an important role in magnon dynamics in noncollinear magnet near
QCP.
Since the newly found excitation exists in a noncollinear
spin structure, the search of the excitation in different typesof noncollinear structures such as cycloidal structure, all-inall-out structure, and skyrmion lattice would be interesting
topics. The search of the hybridized mode in other systems
including charge density wave, spin density wave, and ultracold atoms would be important. Finally, the effect of hybridization to the lifetime of the magnon and other elementary
excitations would be also interesting.
References[1] O. Delaire, J. Ma, K. Marty, A. F. May, M. A. McGuire, M. H. Du,
D. J. Singh, A. Podlesnyak, G. Ehlers, M. D. Lumsden, and B. C. Sales,Nat. Mat. 10, 614 (2011).
[2] M. Matsumoto and M. Koga, J. Phys. Soc. Jpn. 76, 073709 (2007).
[3] H. Yoshizawa,W. Kozukue, and K. Hirakawa, J. Phys. Soc. Jpn. 49,
144 (1980).
[4] N. Kurita and H. Tanaka, Phys. Rev. B 94, 104409 (2016).
[5] S. Hayashida, O. Zaharko, N. Kurita, H. Tanaka, M. Hagihala,
M. Soda, S. Itoh, Y. Uwatoko, and T. Masuda, Phys. Rev. B 97, 140405(2018).
[6] S. Hayashida, M. Matsumoto, M. Hagihala, N. Kurita, H. Tanaka,
S. Itoh, T. Hong, M. Soda, Y. Uwatoko, and T. Masuda, Sci. Adv. 5,
eaaw5639 (2019).

[7] R. Shiina, H. Shiba, P. Thalmeier, A. Takahashi, and O. Sakai,
J. Phys. Soc. Jpn. 72, 1216 (2003).
Authors

S. Hayashida, M. Matsumotoa, M. Hagihala, N. Kuritab, H.
Tanakab, S. Itohc, T. Hongd, M. Soda, Y. Uwatoko and T. Masuda
aShizuoka University
bTokyo Institute of Technology
cKEK
dOak Ridge National Laboratory

Magnetic Structure and Excitationof Quasi One-Dimensional
Antiferromagnet Ba2CoSi2O7
Masuda GroupThe relationship between magnetism and dielectricity
has been extensively studied. In the multiferroics, the ferroelectrics with the cycloidal and proper-screw magnetic
structures are explained by the spin-current mechanism andthe spin-dependent d–p hybridization mechanism, respectively [1,2]. On the other hand, the multiferroic property
has been reported even on a collinear antiferromagnet. Oneof the maultiferroics with the collinear magnetic structure
is an antiferromagnet Ba2CoGe2O7. Ba2CoGe2O7 with theCo-square lattice shows multiferroic properties, and the
local electric polarization of CoO4 tetrahedra is explainedby the spin-dependent d-p hybridization mechanism [3,4].
In contrast, the anomaly of the dielectric constant in similarmaterial Ba2CoSi2O7 is not observed at the antiferromagnetic transition temperature TN =6 K [5]. Ba2CoSi2O7 has
a distorted crystal structure formed by CoO4 and SiO4
networks, as shown in Fig. 1(a), and two kinds of Co-Co
bonds exist within the b-plane. In order to clarify themagnetic model of Ba2CoSi2O7, the magnetization andneutron scattering measurements have been performed.
In the neutron powder diffraction measurement using thehigh-resolution powder diffractometer ECHIDNA installed at
OPAL, ANSTO, Australia, the magnetic reflections indexedby the propagation vector (1/2, 1/2, 1/2) was observed below
TN = 6 K. By analyzing the powder neutron profile, we
found that a collinear antiferromagnetic structure shown in
Fig. 1(b) was realized below TN = 6 K. The magnetic
moments with the easy axis along the [10-1] form an antiferromagnetic arrangement along [101] and a ferromagnetic
arrangement along [10-1]. In the spin-dependent d-p hybridization mechanism, the local electric polarization of the
CoO4 tetrahedron is almost zero with the magnetic moment
along [10-1]. This is consistent with the dielectric property
where the temperature dependence of the dielectric constant
has no anomaly at TN = 6 K.
We have also measured the Q-dependencies of themagnetic excitations along the b * , [10-1], and [101]directions at 1.5 K to clarify the magnetic correlation of
Ba2CoSi2O7 by using a cold-neutron triple-axis spectrometer(CTAX) installed at HFIR, ORNL, USA. Figure 2(a) shows
the constant-Q scan profiles measured at (h, 1/2, h). Figure2(b) shows the h-dependence of integrated intensities andpeak energies obtained by Gaussian fitting of the constantQ profiles at (h, 1/2, h), which corresponds to the Q-dependence along the [101] direction. The excitation observed at
ħw = 2.9 meV is almost dispersionless, but the integrated

Fig. 1. (a) Crystal structure of Ba2CoSi2O7. (b) Schematic magnetic
structure of Ba2CoSi2O7.

ISSP Activity Report 201925

Authors
M. Sodaa, T. Hongb, M. Avdeevc, H. Yoshizawaa, T. Masuda, and
H. Kawano-Furukawaa,daRIKENbORNL
cANSTOdOchanomizu University

High-Field Ultrasonic Study of
Quadrupole Ordering and Crystal
Symmetry Breaking in CeRhIn5
Tokunaga Group

Fig. 2. (a) Constant-Q scans at (h, 1/2, h) measured at 1.5 K. Data
are shifted by vertical offsets. (b) Integrated intensities and the peakenergies at (h, 1/2, h). Solid lines are the calculated values with theclassical spin-wave theory.

intensity exhibits a clear modulation along the [101] direction. In the measurements along the b* and [10-1] directions,on the other hand, both the neutron intensity and peak energy
show less change. (not shown)
We analyzed the magnetic excitation by using the spin
Hamiltonian in order to clarify the magnetic model including
the magnetic interaction in Ba2CoSi2O7. To explain theobserved magnetic excitation, we consider the one-dimensional antiferromagnet in which the antiferromagnetic chain
is along the [101] direction. We performed the calculations of
the neutron intensity and the dispersion energy for both theeasy-axis and Ising-like antiferromagnet models; two models
cannot be distinguished in the classical spin-wave theory.
The magnetic dispersion relation shown in Fig. 2(b) is reproduced by the one-dimensional antiferromagnet model, as
shown by solid curves.
Our results of the neutron scattering suggest that the
Ba2CoSi2O7 is the one-dimensional antiferromagnet withthe easy-axis spin anisotropy or the Ising-like spin. On theother hand, Ba2CoGe2O7 with the tetragonal structure is
two-dimensional easy-plane antiferromagnet. The neutron
results suggest that the crystal structure affects both themagnetic interaction dimensionality and anisotropy inåkermanite-type materials.
References[1] T. Kimura, T. Goto, H. Shintani, K. Ishizaka, T. Arima, andY. Tokura. Nature 426, 55 (2003).
[2] S. Seki, Y. Onose, and Y. Tokura. Phys. Rev. Lett. 101 067204(2008).
[3] H. Murakawa, Y. Onose, S. Miyahara, N. Furukawa, and Y. Tokura.
Phys. Rev. Lett. 105, 137202 (2010).
[4] M. Soda, M. Matsumoto, M. Månsson, S. Ohira-Kawamura, K.
Nakajima, R. Shiina, and T. Masuda, Phys. Rev. Lett. 112, 127205(2014).
[5] M. Akaki, J. Tozawa, D. Akahoshi, and H. Kuwahara, J. Phys.:Conf. Ser. 150, 042001 (2009).

26

ISSP Activity Report 2019In a number of strongly correlated electron systems, theelectronic nematic (EN) state characterized by the lackingof the C4±-rotational operations has been focused because
the EN contribution to superconductivity and other exotic
phenomena have been proposed. Recently, the field-induced
EN phase above 30 T has been proposed in the D4h1 tetragonal compound of CeRhIn5 [1,2], which was well known as apressure-induced heavy-fermion superconductor.
To investigate the active representation and the orderparameter of the field-induced EN phase, we performed anultrasonic measurement for CeRhIn5 in pulsed magnetic
fields up to 56 T [3]. The ultrasound technique is a powerfultool to determine the active representation of a phase transition related to the crystal symmetry breaking because soundwaves can induce the symmetry strain belonging to theirreducible representation (IR) of the space group. Furthermore, we can propose the electric quadrupole as an orderparameter of the crystal symmetry breaking and the EN state
in terms of the electric quadrupole-strain interaction, which
is based on the selection rule of group theory.
To identify the active representation of the symmetry
breaking at the EN state, we measured all the elastic
constants of CeRhIn5 that can be detected in the tetragonal
system. As shown in Fig. 1, the transverse elastic constantCT = (C11 − C12)/2 with the B1g IR of D4h shows the anomaly
at BIM = 28.5 T at 1.4 K and 2.1 K. This BIM is consistent
with the previous studies [1, 2]. While CT shows an anomaly,
other elastic constants, which can identify the symmetry
breaking of B2g and Eg IR, do not exhibit anomaly at BIM.
Therefore, our ultrasonic measurements demonstrate theB 1g-type crystal symmetry breaking. Furthermore, theFig. 1. Magnetic field dependence of the transverse elastic constant
ΔCT/CT at several temperatures for B//[001].u(d)The vertical arrows
indicate the metamagnetic transition field Bm
for field up(down)
sweep, the EN transition field B*, and the critical field Bc. The right andleft arrows show hysteresis direction. The propagation direction q andpolarization direction of ultrasound are indicated.

Fig. 2. Schematic view of the B1g-type quadrupole ordering and crystal
symmetry breaking. (a) Crystal structure in the xy plane of CeRhIn5 in
the normal phase. (b) High-field symmetry breaking state of CeRhIn5.
The red arrows indicate the deformation direction of the crystal lattice
due to the strain εx2 - y2 = εxx - εyy.

electronic degree of freedom with the B1g IR, namely theelectric quadrupole Ox2 − y2 ∝ (x2 − y2) /r2, can be the orderparameter of the EN state. This symmetry breaking is attributed by the electric quadrupole-strain coupling written as
HQS = −gx2 − y2 Ox2 − y2 εx2 − y2.
We show the schematic view of the B1g-type ferroic
electric quadrupole ordering and crystal symmetry breaking
in Fig. 2. The square lattice of CeRhIn5 with the tetragonal
crystal structure of D4h1 is drawn in Fig. 2(a). In the fieldinduced EN state, the electric quadrupole Ox2 − y2 appearson the Ce site. The lattice changes from the square of thetetragonal structure to the rectangle of orthorhombic one dueto the quadrupole-strain coupling HQS accompanying thelattice distortion εx2 − y2 = εxx − εyy. A maximal nonisomorphic orthogonal subgroup D2h1 is an appropriate space-groupfor this symmetry lowering from D4h1.
Furthermore, we found the acoustic de Haas-van Alphen(AdHvA) oscillation in CT with the frequency 690 T, which
has not been observed experimentally. On the other hand, thetheoretical study treating 4f electrons as itinerant has shown ahole Fermi surface with the frequency ~ 690 T [4]. Thus, we
proposed the origin of the AdHvA oscillation in terms of thequadrupole-strain coupling in the k-space based on the deformation potential theory [5].
We also discussed the quantum state possessing theelectric quadrupole. The delocalization of 4f electrons andthe in-plane type p-f hybridization are candidate interactions
constructing the quantum state in high fields.

both experimentally and theoretically. One of the intriguing
phenomena in UTe2 recognized in the very early stage is
its large superconducting critical fields. For the magnetic
fields applied along the hard magnetization b-axis, thesuperconducting transition can survive well above the Pauliparamagnetic limit [1,2]. This fact suggests the realization of the long-sought spin-triplet superconductivity. Suchunconventional superconductivity is believed to realize in the
ferromagnetic superconductors (FMSCs), such as URhGeand UCoGe. In the case of UTe2, however, the ground stateis paramagnetic. Here, we introduce our observation ofmetamagnetic transition in UTe2 and discuss the relation
between metamagnetism and superconductivity by comparedto FMSCs [3].
The high-field magnetization was measured by using
the pulse magnets installed in the International MegaGauss
Science Laboratory. Figure 1(b) shows the magnetization curve for the field along the b axis at 1.4 K. At μ0Hm
~ 35 T, magnetization suddenly increases with a large stepof ~0.6 μB. Because of the hysteric behavior against themagnetic field, this metamagnetic transition is of first-order.
From the magnetization curves at various temperatures, wesummarized a magnetic phase diagram of UTe2 in Fig. 1(a).
The field hysteresis disappears above 11 K, indicating theexistence of the critical end point (CEP), and the transitionchanges to crossover. As known in many paramagnets, theenergy scale of metamagnetic transition, μ0Hm, corresponds
to Tχmax, where the temperature dependence of magnetic
susceptibility shows a broad maximum. This relation isfurther supported by the fact that μ0Hm(T) connects toTχmax(μ0H). At almost the same time, the high-field magnetoresistance measurements independently revealed a similarphase diagram [4]. A sharp step-like increase in the resistance across the Hm may reflect the modification of the
Fermi surface, although it is not clear yet. More interestingly,
the superconducting (SC) phase shows a reentrant behavior
above 16 T and is suddenly suppressed above μ0Hm [5] [seeReferences[1] P. J. Moll et al., Nat. Commun. 6, 6663 (2015).
[2] F. Ronning et al., Nature (London) 548, 313 (2017).
[3] R. Kurihara et al., Phys. Rev. B 101, 115125 (2020).
[4] D. Hall et al., Phys. Rev. B 64, 064506 (2001).
[5] M. Kataoka and T. Goto, J. Phys. Soc. Jpn. 62, 4352 (1993).
Authors
R. Kurihara, A. Miyake, M. Tokunaga, Y. Hirosea, and R. Settaia
aNiigata University

Discovery of Metamagnetic
Transition in New Unconventional
Superconductor UTe2
Tokunaga GroupNews of the discovery of unconventional superconductivity in a paramagnetic heavy-fermion system UTe2 at theend of 2018 has excited strongly the researchers working on
the condensed matter physics. Within a few years since thefirst report in arXiv, many new aspects have been unveiled

Fig. 1. (a) Magnetic phase diagram of UTe2 for H // b determined by
Hm and Tcmax. CEP denoted by a diamond is critical end point. (b)Magnetization curve for H // b at 1.4 K. (c) Magnetic field dependenceof the electronic specific heat derived from magnetization curves by theMaxwell relation.

ISSP Activity Report 201927

Fig. 1(a)]. This unusual Tc enhancement can be explained
qualitatively by a simple mass-enhancement model asfollows. Figure 1(c) represents the magnetic-field evolutionof the electronic specific heat g, derived by the thermodynamic Maxwell relation using the temperature dependencies of magnetization at constant fields [3]. With increasing
fields, the γ increases and shows a maximum at Hm. Thisenhancement is also confirmed by the direct specificheat measurement using a pulse magnet in ISSP [6]. Thisenhancement on going to metamagnetic transition indicatesthat the development of the fluctuation evolves around Hm.
This fluctuation may stabilize the SC phase even at highmagnetic fields as has been adapted to explain the reentrant
superconductivity in URhGe. Using a simplified McMillantype formula, the field-enhancement of the superconducting
transition temperature can be reproduced qualitatively [seeRefs. 3 and 6 for more detail and references therein].
Now, it is no doubt that the high-field studies make animportant role to reveal the superconductivity on UTe2. Soon
after our work [4], more exciting phenomena in high fields
were reported [7]: Surprisingly, another SC phase appears at
Hm when the field is applied intermediate angles between thea and c axis. This is in stark contrast to the fact of suppression of SC at Hm for the b axis. Our struggles continue.
References[1] S. Ran, C. Eckberg, Q.-P. Ding, Y. Furukawa, T. Metz, S. R. Saha,
I.-L. Liu, M. Zic, H. Kim, J. Paglione, and N. P. Butch, Science 365,684 (2019).
[2] D. Aoki, A. Nakamura, F. Honda, D. X. Li, Y. Homma, Y.
Shimizu, Y. J. Sato, G. Knebel, J.-P. Brison, A. Pourret, D. Braithwaite,
G. Lapertot, Q. Niu, M. Vališka, H. Harima, and J. Flouquet, J. Phys.
Soc. Jpn. 88, 043702 (2019).
[3] A. Miyake, Y. Shimizu, Y. J. Sato, D. Li, A. Nakamura,Y. Homma, F. Honda, J. Flouquet, M. Tokunaga, and D. Aoki, J. Phys.
Soc. Jpn. 88, 063706 (2019).
[4] W. Knafo, M. Vališka, D. Braithwaite, G. Lapertot, G. Knebel, A.
Pourret, J.-P. Brison, J. Flouquet, and D. Aoki, J. Phys. Soc. Jpn. 88,
063705 (2019).
[5] G. Knebel, W. Knafo, A. Pourret, Q. Niu, M. Vališka, D. Braithwaite, G. Lapertot, M. Nardone, A. Zitouni, S. Mishra, I. Sheikin, G.
Seyfarth, J.-P. Brison, D. Aoki, and J. Flouquet, J. Phys. Soc. Jpn. 88,
063707 (2019).
[6] S. Imajo, Y. Kohama, A. Miyake, C. Dong, J. Flouquet, K. Kindo,
and D. Aoki, J. Phys. Soc. Jpn. 88, 083705 (2019).
[7] S. Ran, I.-L. Liu, Y. S. Eo, D. J. Campbell, P. Neves, W. T.
Fuhrman, S. R. Saha, C. Eckberg, H. Kim, J. Paglione, D. Graf, J.
Singleton, and N. P. Butch, Nat. Phys. 15, 1250 (2019).
Authors
A. Miyake, Y. Shimizua, Y. J. Satoa, D. Lia, A. Nakamuraa, Y. Hommaa,
F. Hondaa, J. Flouquetb, M. Tokunaga, and D. Aokia, baTohoku University
bCEA-Grenoble

Fig. 1. High-magnetic-field X-ray diffraction profiles of the α-phase ofsolid oxygen at 10 K. Vertical dashed lines indicate the positions thatare expected from the previous report [2]. (a) 001 reflection peaks areshown. (b) -111 and -201 peaks are shown. Peaks with * are considered
to be due to impurities on the window of the sample cell.

meaning that the successive phase transitions are not merely
magnetic phase transitions but structural phase transitions.
The γ-phase, β-phase, and α-phase have a cubic, rhombohedral, and monoclinic crystal structure, respectively. The
lowest temperature phase, the α-phase is an antiferromagnet
at a low temperature below 24 K, while the β-phase only
exhibits a short-range antiferromagnetic correlation and the
γ-phase is paramagnetic. We have been sharing the idea thatmagnetic energy between oxygen molecules should play
an important role for having different crystal structure for along time. However, no direct experimental evidence of thestrong spin-lattice coupling had ever been obtained before
the discovery of the novel magnetic-field-induced θ-phase at
120 T [1]. It has been proved that controlling spins induces anovel oxygen crystal.
Microscopic investigation of the crystal lattice of solid
oxygen in magnetic fields is important. Actually, there
was a report of the high magnetic field x-ray diffraction of
the solid oxygen using a synchrotron x-rays up to 8 T andsignificantly large magnetostriction was likely to occur
in the α-phase of solid oxygen [2]. The volume striction
ΔV/V was found to reach around 10-2. In the present study,
we have extended the magnetic field range to 25 T for the
x-ray diffraction experiment.
The high-field XRD experiments have been performedat the Institute for Materials Research of Tohoku University
with a DC magnet up to 5 T, and at BL22XU in SPring- 8
up to 25 T using a pulsed magnet. Pure oxygen gas (purity> 99.99995%) was liquified by cooling into a sample cell
designed for each experiment. For the 5 T DC-magnet
experiment, a CuKα (1.54 Å) characteristic emission line

High-Magnetic-Field X-Ray
Diffraction Study in Solid Oxygen
Y. Matsuda Group
Molecular oxygen is a unique homonuclear diatomic
molecule because it possesses a spin quantum number S = 1.
After M. Faraday had noticed that gaseous oxygen exhibits
magnetism, condensed phases, namely liquid and solid
phases have been extensively studied as intriguing magnetic
materials. Solid oxygen undergoes successive phase transitions with lowering temperature, and three distinct phases,
γ-phase, β-phase, and α-phase appear at 54, 44, and 24 K,
respectively. One of the most intriguing findings on thesethree phases is that they have different crystal symmetries,

28

ISSP Activity Report 2019

Fig. 2. The relative changes of the diffraction plane spacing at 5 T are
shown at different reciprocal vectors.

was used as the x-ray source. The measurement temperature
was controlled to be 10 K. In the 25 T pulse-magnet experiments, the photon energy (wavelength) of the synchrotron
x-ray used is 15 keV (0.8266 Å). The time interval of thesuccessive pulsed magnetic field measurements is 10–20
min, which is necessary for cooling the magnet after heating
due to the discharge for field generation. The variation of themagnetic field ΔB/B during the measurement time (100 μs) isaround 2% [3].
The measured XRD profiles in pulsed magnetic fields
at 10 and 25 T are shown in Fig. 1 along with the zerofield profile. The XRD at 0 T is measured with an exposure
time of 10 ms. The profiles at 10 and 25 T are obtained byaverages of six times and five times the repetition of themeasurements, respectively. The obtained XRD profiles atdifferent magnetic fields seem to be identical at first glance.
In order to confirm the unexpectedly small magnetic
field effect, we have also analyzed the steady field XRD datathat have higher precision in terms of the longer accumulation time. And also, we need to exclude a possibility thatthe dynamics of the crustal lattice is slower than the pulsed
magnetic field of which duration time is 1 ms in this study.
Figure 2 shows the obtained linear magnetostriction
Δd/d at 5 T. The Δd/d of several diffraction plane spacing isfound to be as small as 10-4 which is more than one order ofmagnitude smaller than the values reported previously [2].
The reason for the contradiction between our results
and the previous study is not very clear. One of the possible
causes for the contradiction is that there had been somemechanical influence on the experimental configuration by
applying DC magnetic fields. Small mechanical movementsof measurement apparatuses can cause a change in theobserved XRD peak positions [3].
The high-field XRD experiments on α oxygen at 10 K
has revealed that the linear magnetostriction Δd/d is smaller
than 10−4 T−1 in magnetic fields of up to 25 T [3]. The
absence of the giant magnetostriction in α oxygen is also inagreement with the experimental fact that the magnetic field
induced α-θ transition is first order [1]. The deformation of
the crystal lattice in a magnetic field is not significant below
the critical magnetic field around 100 T. It is likely that adrastic symmetry change in the crystal lattice takes place
discontinuously at the phase transition.

Observation of Quantum Spin-Nematic
Phase in Volborthite
Kohama, Kindo and Hiroi Groups
For a long time, it was believed that matter could exist in
only three different forms, solid, liquid and gas. However, inthe second half of the nineteenth century, it became clear that
not all substances could be described as solid, liquid or gas.
Liquid crystals came of age in the twentieth century, as botha subject of fundamental research and the basis for modern
display technology. Since we know examples of quantum
gases, liquids and solids, it is natural to ask, are there
quantum liquid crystals, too? For a long time, this question
remained a mathematical curiosity. However, in recent years,
potential quantum analogues of a liquid crystal state havebeen discussed in real material, which is called a quantum
spin-nematic state. Its experimental observation has proved
much more challenging, since the order parameter of the spin
nematic state, spin quadrupole moment, is hard to detect withconventional magnetic probes.
In this research, with an exotic frustrated magnet,
volborthite, we provided the possible evidence of quantum
analogue of the nematic crystal, and resolved a long-standing
mystery about the magnetism of volborthite [1]. Here weapplied thermodynamic measurement techniques, the magnetocaloric effect (MCE) and specific heat(C) measurements,
which measure entropy and sensitive to any phase transition
irrespective of the type of the order parameter. The state-ofart experimental capability in IMGSL; high-field calorimetry
in magnetic fields up to 60 T and low temperatures down to
0.5 K, enabled observation of quantum spin-nematic state involborthite.
First, we show the MCE curves obtained in the adiabatic
condition, T(H), in Fig. 1(a). The adiabat T(H) initiallydecreases with increasing fields, before passing a broad
minimum at ~25 T and then increases at higher fields. Below
1.7 K, a notable change occurs as seen in the enlarged
plot (Fig. 1(b)). The broad minimum in T(H) acquires
small dips, indicative of phase transitions at 22.5, 25.5 and27.5 T. Each of these three critical fields has also been foundin measurements of MCE under nearly isothermal conditions

References[1] T. Nomura, Y. H. Matsuda, S. Takeyama, A. Matsuo, K. Kindo, J. L.
Her, and T. C. Kobayashi, Phys. Rev. Lett. 112, 247201 (2014).
[2] K. Katsumata, S. Kimura, U. Staub, Y. Narumi, Y. Tanaka, S.
Shimomura, T. Nakamura, S. W. Lovesey, T. Ishikawa, and H.
Kitamura, J. Phys.: Condens. Matter 17, L235 (2005).
[3] Y. H. Matsuda, A. Shimizu, A. Ikeda, T. Nomura, T. Yajima, T.
Inami, K. Takahashi, T. C. Kobayashi, Phys. Rev. B 100, 214105(2019).
Authors
Y. H. Matsuda, A. Shimizu, A. Ikeda, T. Nomura, T. Yajima, T. Inamia,
K. Takahashib, and T. C. Kobayashic
aNational Institutes for Quantum and Radiological Science andTechnology
bTohoku University
cOkayama University

Fig. 1. Magnetocaloric effect and magnetic phase diagram of volborthite. (a) Experimental data of the MCE in volborthite. (b) Enlarged
plot of MCE curve. The phase boundaries deduced from the MCE andC(T) measurements were plotted by solid symbols and open circles.

ISSP Activity Report 201929

Magnetization Process of the Breathing
Pyrochlore Magnet CuInCr4S8 in
Ultrahigh Magnetic Fields up to 150 T
Kohama Group

Fig. 2. Specific heat in volborthite. (a) Experimental results for specificheat C(T) for magnetic fields spanning the low-field phase I, phase II(SDW), and phase N1. (b) Specific heat within the hidden-order phaseN2 and the plateau state P.

as shown in Fig. 1(b) as black and green curves. In Fig. 1(b),we also plot the phase boundary deduced from MCE andC(T) measurements.
We have further investigated the temperature-dependenceof C in magnetic fields up to 30.2 T as seen in Fig. 2. In
the absence of magnetic field, C(T) exhibits small peaks
as reported previously (See Fig. 2(a)). The onset of SDWorder (Phase II) is also revealed as a broad shoulder inC(T). Different behavior is observed above 22.5T where
the transition is marked by a substantial λ-shaped anomaly.
An extremely sharp peak (Fig. 2(b)) is developed above
25.5 T, consistent with the phase boundary identified in
MCE. Above the crossover field to the plateau state (P) at
27.5T, no anomaly is observed in C(T). These observations
provide unequivocal evidence that there are two different
magnetic states between SDW and plateau states, i.e., Phases
N1 and N2 as seen in Fig. 1(b). It is important to note that theearlier NMR results [2], however, failed to resolve the phase
N2. Since the spin quadrupole moment cannot be detectedby conventional magnetic probes such as NMR, it is reasonable to consider the phase N2 between 25.5 and 27.5 T is
the ordered state of the quadruple moment that is so-called aquantum spin nematic state.

Breathing pyrochlore magnets with an alternating arrayof small and large tetrahedra have recently attracted attention because of their potential realization of exotic magnetic
states. One promising candidate is the S = 3/2 chromium
spinel oxide, LiInCr4O8, characterized by the small breathing
factor J’/J~0.1, where J and J’ are the exchange interactions
on the small and large tetrahedra, respectively (inset of Fig.
1) [1]. In this system, the spin-lattice coupling (SLC) as wellas the breathing factor govern its magnetic properties, as
represented by a tetramer-singlet formation [1] and a fieldinduced transition to a 1/2-magnetization plateau phase [2].
Another intriguing system is the sulfide, CuInCr4S8, where
the antiferromagnetic (AFM) J and the ferromagnetic (FM)J’ coexist [3]. As shown in Fig. 1, the previously reported
M-H curves at 1.4 K (orange and cyan lines for up anddown sweeps, respectively) show a metamagnetic behavior
with a large hysteresis loop at around Hc1=20~40 T, while
M reaches only 45 % of the saturation magnetization of~3.06 μB/Cr at 73 T [3].
In this work, we performed magnetization measurements
on a polycrystalline powder sample of CuInCr4S8 by using
a single-turn coil system. The observed M-H curve and its
derivative dM/dH at 5 K up to 150 T are shown in Fig. 1 (redand blue lines for up and down sweeps, respectively) [4].
Remarkably, a wide 1/2-plateau emerges from Hc2 ~ 65 T

References[1] Y. Kohama, H. Ishikawa, A. Matsuo, K. Kindo, N. Shannon, and
Z. Hiroi, PNAS 116(22) 10686 (2019).
[2] H. Ishikawa, M. Yoshida, K. Nawa, M. Jeong, S. Kramer, M.
Horvatic, C. Berthier, . Takigawa, M. Akaki, A. Miyake, M. Tokunaga,
K. Kindo, J. Yamaura, Y. Okamoto, and Z. Hiroi, Phys. Rev. Lett. 114,
227202 (2015).
[3] O. Janson, S. Furukawa, T. Momoi, P. Sindzingre, J. Richter, and
K. Held, Phys. Rev. Lett. 117, 037206 (2016).
Authors
Y. Kohama, H. Ishikawa, A. Matsuo, K. Kindo N.Shannona, and Z.
Hiroi
aOkinawa Institute of Science and Technology Graduate University

30

ISSP Activity Report 2019

Fig. 1. M-H curves of CuInCr4S8 measured at ~5 K in a single-turncoil megagauss generator up to 150 T (red and blue curves for up anddown sweeps, respectively). Derivatives dM/dH are shown in the upper
panel. The previously reported M-H curve measured at 1.4 K up to 73
T are also shown (orange and cyan curves for up and down sweeps,
respectively) [3]. Transition fields are denoted by brackets or arrows in
the upper panel, and drawn by the shaded areas (first order) or dashedlines (second order) in the lower panel. Inset shows the schematic of thebreathing pyrochlore lattice.

[4] M. Gen, Y. Okamoto, M. Mori, K. Takenaka, and Y. Kohama, Phys.
Rev. B 101, 054434 (2020).
[5] K. Aoyama and H. Kawamura, Phys. Rev. B 99, 144406 (2019).
Authors
M. Gen, Y. Okamotoa, M. Moria, K. Takenakaa, and Y. Kohama
aNagoya University

Femtosecond Laser Pulse Generation
with 20-GHz Repetition Rate
Kobayashi Group

Fig. 2. Calculated magnetization curves as a function of magnetic field
h for b/(1 + JFN/J) = 0 to 0.25 in steps of 0.05. The spin structures
corresponding to the curve for b/(1 + JFN/J) = 0.10 (thick green line)
are shown in the upper part of the figure.

to Hc3 ~ 112 T as in Cr spinel oxides. Besides, two inherent
features are observed: A slight change in the slope of theM-H curve at Hc2’ ~ 85 T and a shoulder like shape at Hc4~ 135 T. Both are accompanied by a hysteresis, suggesting
first-order transitions. The saturation is estimated to Hsat ~180 T under the assumption that M increases linearly above
150 T, where M already reaches ~2.7 μB/Cr.
For interpreting the observed magnetization process, weconstructed an effective spin model mapped onto the fcc
lattice, which is derived from the microscopic spin model on
the breathing pyrochlore lattice with the SLC as proposed inRef. [5]. Figure 2 summarizes the calculated M-H curves forgiven values of the SLC parameter b and the corresponding
spin structures. In spite of the simplification in our model,
the calculation well reproduces the main feature of the M-Hcurve of CuInCr4S8, including a relatively wide intermediate(canted 2:1:1) phase as well as the 1/2-plateau phase withcollinear 3:1 spin configuration.
It is noteworthy that the M-H curves of LiGaCr4S8 and
LiInCr4S8, where the FM interaction J’ is expected to bestrong, do not exhibit the 1/2-plateau [3]. Bearing this inmind, the exotic magnetic behaviors on CuInCr 4S8 canbe attributed to the relatively dominant AFM interactions
J+JFN compared to the FM J’, which is achieved only by
the moderate breathing distortion in the Cr spinel sulfide.
On the other hand, the origins of the hysteretic behaviors on
CuInCr4S8 at Hc2’ and Hc4 remain unsolved at the moment.
They might originate from the interplay between the SLC
and the further neighbor interactions JFN, or the thermal andquantum effects, which are not considered in the present
theory. The macroscopic spin structures beyond four sites
within small tetrahedra should also be clarified, which is
crucial to prove the novelty of the magnetic properties in
CuInCr4S8. Further experimental investigations such as
magnetostriction, ESR, and magnetocaloric effect measurements in high magnetic fields are ongoing to elucidate theessence of the successive phase transitions.
References[1] Y. Okamoto, G. J. Nilsen, J. P. Attfield, and Z. Hiroi, Phys. Rev.
Lett. 110, 097203 (2013).
[2] M. Gen, D. Nakamura, Y. Okamoto, and S. Takeyama, J. Magn.
Magn. Mater. 473, 387 (2019).
[3] Y. Okamoto, M. Mori, N. Katayama, A. Miyake, M. Tokunaga, A.
Matsuo, K. Kindo, and K. Takenaka, J. Phys. Soc. Jpn. 87, 034709(2018).

Femtosecond laser pulses have widely used in thefield of spectroscopy, metrology and material processing.
Especially, material processing using the femtosecond laser
has played an important role in the manufacturing because
it does not induce thermal damages around the processingarea, resulting in the high-quality micro-processing. One
important laser parameter for these applications is a pulse
repetition rate, which is typically in the range of 1 kHz to
100 MHz. Recent progress of the laser technologies has
succeeded to generate femtosecond laser pulses with thegigahertz repetition rate. These high repetition rate pulses
have performed efficient material processing compared withthe low repetition rate laser pulses. Although the high repetition rate pulses are one candidate of the next-generation laser
processing, mechanisms of the efficient material removal
have not understood ever before. One reason is a lack of themulti-GHz femtosecond laser sources. Especially, material
removal via laser pulses with the repetition rate above
10-GHz have not examined due to the difficulty of generating the multi-GHz laser pulses. We are interested in thegeneration of such kind of laser pulses.
Several methods have been used to generate multi-GHz
repetition rate pulses. We focused on the Kerr-lens mode
locked laser (KML), which provides the shortest pulse
duration in the femtosecond lasers. The repetition rate of the
KML is determined by the cavity length, with the relationof f = c/L, where f denotes the pulse repetition rate, c isthe speed of the light and L is the cavity length. Therefore,
the higher repetition rate is achieved with a shorter cavity
length. To date, KML has realized up to 15 GHz repetition
frequencies with a pulse duration of 150 fs. This repetition
frequency corresponds to a cavity length of 20 mm. To
increase the repetition rate above, the cavity length must be
shorter than 20 mm. However, the cavity length is limited by
the size of the optical element. In addition, typical KML isconfigured with 5 to 7 optical component, resulting in a large
cavity.
In this work [1], we developed the KML with the repletion rate above 20 GHz only using three optical components. This was achieved by designing new cavity geometry,
which includes a triangle-cut laser gain medium and multi-

Fig. 1. The cavity geometry

ISSP Activity Report 201931

Fig. 2. A part of the output spectrum

functional dielectric coating. The detail cavity configuration
is described in Figure 1. We use a gain medium of Yb:Y2O3
ceramic because an output light can be easily amplified byusing a Yb-doped fiber amplifier. The pump source wasan wavelength-stabilized laser diode coupled to a single
mode fiber. One side of the gain medium was coated witha dichroic chirped mirror, while the other side was wedgedat the Brewster angle. The concave mirror was dichroiccoated and its angle compensated an astigmatism that was
introduced by the Brewster-cut gain medium. The plane
mirror was high-reflection coated and was used as the output
coupler.
Femtosecond pulse generation was achieved with thecavity length of 15 mm, which determines the pulse repetition rate as 20 GHz. A pulse duration was measured as
120 fs. The pulse repetition rate corresponds to the spacingof longitudinal cavity mode, which can be identified fromthe optical spectrum. Figure 2 shows a part of the optical
spectrum. Each longitudinal mode is clearly observed
because the mode spacing is wider than a spectrometer
resolution of 4 GHz. To the best of our knowledge, therepetition rate of 20 GHz is the highest frequency in KMLs.
Our results will enable the investigation of the material
processing above the 10-GHz repetition rate.
Reference[1] S. Kimura, S. Tani, and Y. Kobayashi, Optica 6, 532 (2019).
Authors
S. Kimura S. Tani, and Y. Kobayashi

Geometrical Frustration of B-H Bonds
in Layered Hydrogen Borides
Accessible by Soft Chemistry
I. Matsuda GroupElectrically conducting materials have been essential elements for devices and also for redox reactions onelectrodes to sustain our electronic and information society.
Miniaturizations in nanotechnology have demanded toreduce the material size down to the atomic limit, however,there are only a few conducting atomic layers, such asgraphene, up to now. A search of a novel atomic layer issignificant to produce new physical/chemical properties
and also to promote various functionalities by combining
different types of layers.
In 2017, atomic sheets of hydrogen boride (HB) or
borophene are synthesized by the ion-exchange process[1]. The HB sheet has been theoretically predicted to be
conducting. However, preliminary experiments of the trans-

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ISSP Activity Report 2019

Fig. 1. (a) An image of scanning electron microscope of the hydrogen
boride sheet. (b) Current‐voltage curves acquired at various temperatures of the sheet [2].

Fig. 2. Atomic structure model of the special local structure in thehydrogen boride sheet [2].

port measurement have resulted in insulating properties.
This fact has lead experimentalists to take great efforts ofimproving the purity of the samples to develop the conductivity. Eventually, in the present research [2], high-purity HBsheets were successfully synthesized, as shown in Fig. 1(a),and achieved the highest conductivity in hydrogen borides(0.13 S/cm). Moreover, suppression of the conductivity inprevious samples were found to be due to adsorption ofresidual organic molecules on the sheet. Interestingly, the HB
sheet becomes insulating at 30 °C when there are residual
molecules and, reversely, returns to have high conductivity
below the temperature, as shown in Fig. 1(b).
To reveal the intriguing phenomena in terms of theatomic structure, an X-ray scattering experiment was carriedout at the synchrotron radiation facility, SPring-8. By
analyzing the experimental pair distribution function with theBayesian optimization, it became clear that there are locallyspecial arrangements of hydrogen atoms in the sheet thatallow adsorptions of the residual organic molecules. Figure 2
shows the atomic model. The structure consists of threecenter, two-electron (3c-2e) B-H-B bridging bonds as wellas ordinary two-center, two-electron (2c-2e) B-H terminal
bonds. The present research revealed that conductivity ofatomic sheets of hydrogen boride can be regulated by thetiny number of molecules, indicating promising functionalities in sensors or in catalysts.
References[1] H. Nishino, T. Fujita, N. T. Cuong, S. Tominaka, M. Miyauchi, S.
Iimura, A. Hirata, N. Umezawa, S. Okada, E. Nishibori, A. Fujino, T.
Fujimori, S. Ito, J. Nakamura, H. Hosono, and T. Kondo, J Am Chem
Soc. 139, 13761 (2017).
[2] S. Tominaka, R. Ishibiki, A. Fujino, K. Kawakami, K. Ohara, I.
Matsuda, H. Hosono, and T. Kondo, Chem 6, 406 (2020).
Authors
S. Tominakaa,b, I. Matsuda, and T. Kondoc,daInternational Center for Materials Nanoarchitectonics (MANA),
National Institute for Materials Science (NIMS)
bJapan Synchrotron Radiation Research InstitutecTokyo Institute of Technology
dUniversity of Tsukuba

Ultrafast Unbalanced Electron
Distributions in Quasicrystalline
30° Twisted Bilayer Graphene
I. Matsuda, Okazai, and Komori Groups
Layers of twisted bilayer graphene exhibit varieties
of exotic quantum phenomena and the twist angle Θ has
become an important degree of freedom for exploring novel
states of matters. At Θ = 1.1°, the two-dimensional superconductivity was observed, while, at Θ = 30°, a two-dimensional
quasicrystal is synthesized. For the quasi-crystalline twisted
bilayer graphene (QCTBG), the interlayer interaction is
the minimum due to the 30° twisted angle and the massless
Dirac Fermions remain in the two layers. The electronic state
results in the twelve-fold (dodecagonal) structure and it iscomposed of upper- and lower-layer Dirac cones, ULDs and
LLDs, as shown in Fig. 1.
We explored this electronic structure by focusing on

Fig. 1. Crystal and electronic structure of a twisted bilayer graphene
quasicrystal on the SiC substrate. The upper- and lower-layer
graphene sheets are twisted by 30 degrees with respect to each other.
In the momentum space, electronic structure of a TBG quasicrystal
is composed of the upper-layer Dirac (ULD) and lower-layer Dirac(LLD) bands. The inner-red and blue Dirac cones represent the replica
bands of ULD and LLD bands by the umklapp scattering induced by
the incommensurate interlayer stacking of the quasi-crystallinity. The
quasi-crystalline twisted bilayer graphene was n-type: Dirac point andequilibrium chemical potential are denoted as DP and μeq, respectively.

Fig. 2. Calculated band structures for the ULD and LLD bands in
QCTBG and for non-twisted bilayer graphene (NTBG) band, respectively. Dashed lines indicate the μeq level. d–f, Equilibrium angleresolved photoemission spectra for ULD, LLD, and NTBG bands. DP
is indicated by an arrow. g–i, Difference images of TARPES for the
ULD, LLD, and NBLG bands. Red and blue points represent increasing
and decreasing photoemission intensity, respectively.

Fig. 3. Chemical-potential shift as a function of pump-probe delay timefor LLD and ULD bands for QCTBG. For comparison, the result for
NTBLG is also shown.

the ultrafast dynamics through time- and angle-resolved
photoemission spectroscopy (TARPES), which allows us todirectly observe the temporal evolution of fermions in the
Dirac cones [1]. The measurement used the pump-probe
approach with an infrared pulse with hv = 1.55 eV serving
as pump and an extreme-ultraviolet pulse with hv = 21.7 eVserving as a probe to cover the entire two-dimensional Brillouin zone. Figure 2 shows a summary of the TARPES band
diagrams taken at selected delay time for the ULD and LLD
bands in a TBG quasicrystal. The results of the periodic
non-twisted bilayer graphene (NTBG) are also shown forcomparisons. After the pump pulse (intensity ~0.7 mJ/cm2),
the TARPES band diagram of individual bands of bilayers
evolves on the femtosecond time scale. To enhance thetemporal variations, the band diagrams are shown as thedifference between the spectra before and after photoexcitation. The spectral weights for all bands decrease immediately
below μeq and increase above μeq at Δt= 0.05 ps. This reflects
the excitation of electrons from the occupied bands to theunoccupied bands. At Δt= 0.16 and 0.32 ps, the difference
intensity decreases with delay time, which corresponds to therelaxation of photoexcited carriers.
To evaluate the occupation of Dirac cones by nonequilibrium carriers, we made energy distribution curves of
the Dirac bands by integrating over momentum space andsummarized the chemical-potential shift or the photoinduced potential as Fig. 3. As shown in the figure, thedifferent time evolution for potential indicates that the ULD
and LLD bands have the opposite behavior after Δt = 0.2 ps(i.e. the ULD undergoes a negative shift whereas the LLD
undergoes a positive shift). Interestingly, the photo-induced
potential for the NTBG band remains constant at essentiallyzero over the same time delay. The striking difference among
the three types of the Dirac cones provides clear evidenceof a carrier imbalance between the ULD and LLD bands of
the QCTBG on the ultrafast time scale. Through the kinetic
analysis, the key mechanism was found to involve the carriertransport between layers and the transient doping from thesubstrate interface. Our TARPES measurements on replicasof the ULD and LLD bands, shown in Fig.1, revealed thatthe ultrafast dynamics scheme continues after the Umklapp
scattering. The dynamics in the atomic layer opens the possibility of new applications and creates interdisciplinary links
in the optoelectronics of van der Waals crystals.

ISSP Activity Report 201933

Reference[1] T. Suzuki, T. Iimori, S. J. Ahn, Z. Yuhao, M. Watanabe, J. Xu,
M. Fujisawa, T. Kanai, N. Ishii, J. Itatani, K. Suwa, H. Fukidome, S.
Tanaka, J. R. Ahn, K. Okazaki, S. Shin, F. Komori, and I. Matsuda,
ACS Nano 13, 11981 (2019).
Authors
I. Matsuda, T. Suzuki, K. Okazaki, and F. Komori

Photoinduced Hydrogen Releasefrom Hydrogen Boride Sheets
I. Matsuda Group
Materials consisting of one atomic layer, such asgraphene, are one of the two-dimensional materials that haveshown various physical and chemical properties that are
different from ordinary ones. Recently, novel atomic layersof boron, so-called “borophene”, were reported and thematerials were found to surpass the performance of grapheneby theoretical works. However, the growth requires special
conditions such as appropriate metal substrates, high temperature and ultra-high vacuum.
Under these circumstances, we have succeeded in synthesizing a hydrogen boride (HB) sheet (Fig. 1(a)), which ishydrogenated borophene or borophane, under the ambientcondition. Since the HB sheet is composed only of the lightelements, boron and hydrogen, the mass hydrogen density
is as high as 8.5%, and it was expected to be applied asa safe and lightweight material for the hydrogen carrierthat replaces the conventional high-pressure hydrogen gas
cylinder with a risk of explosion. However, it has required toconsider a procedure to extract hydrogen atoms/moleculesfrom the sheet before the actual use. In the present research,
we designed and verified the hydrogen release by the lightirradiation [1].
According to the first-principles calculation of thehydrogen boride sheet, the optical transition (α → β) occurs
from the bonding orbital of boron to the antibonding
orbital, as shown in Fig. 1(b). On the other hand, there isalso an optical transition (α → γ) to the antibonding orbitalof hydrogen. Since this transition energy corresponds to a
photon energy of ultraviolet (UV) ray, it is hypothesized thathydrogen could be released from a hydrogen boride sheet
only by the UV irradiation even under the ambient condition.
The experimental verification was made by analyzing thegas molecules emitted from the hydrogen boride sheets withusing two types of light sources. One type of the sources
irradiates visible light that can cause the optical transition (α → γ), while the other type irradiates ultraviolet lightthat can induce the optical transition (α → β). As shown in
Fig. 2, it was confirmed that the hydrogen gas was generated
by exposure of the ultraviolet ray. By quantifying the amountFig. 1. (a) Top and side views of the atomic structure of the HB sheet.
The unit cell is indicated by the dashed lines. (b) Projected band structures of B- and H-originated orbitals [1].

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ISSP Activity Report 2019

Fig. 2. A amount of H2 production by the light irradiation with two
different light sources [1].

of the hydrogen production, it was found that 8% of the massof the hydrogen boride sheet was consumed for the hydrogen
release. For conventional hydrogen storage alloys, the masshydrogen density is up to 2%. Even a promising hydrogen
carrier of the organic hydrides reaches mass hydrogendensity of 6.2% with heating above 300 °C. Thus, thehydrogen boride sheet can be a safe, lightweight and simple
portable hydrogen carrier with a simple light operation of theextremely high hydrogen release.
Reference[1] R. Kawamura, N. T. Cuong, T. Fujita, R. Ishibiki, T. Hirabayashi, A.
Yamaguchi, I. Matsuda, S. Okada, T. Kondo, and M. Miyauchi, Nature
Commun. 10, 4880 (2019).
Authors
I. Matsuda, T. Kondoa,b, and M. Miyauchic
aTokyo Institute of Technology,
bUniversity of Tsukuba
cTokyo Institute of Technology

Surface-State Coulomb Repulsion
Accelerates a Metal-Insulator Transitionin Topological Semimetal Nanofilms
I. Matsuda, Sugino, and Komori Groups
By reducing the size of materials in the microscopic
scale, the electronic states are governed by the rules ofquantum mechanics and the various quantities, such asenergy levels, take discrete values (the quantum size effect,
QSE). Thus, there can be a case that gapless metal films
become insulating at the nanoscale. Such a QSE-induced
transition into an insulating phase in semimetallic nanofilms
was predicted more than half a century ago on bismuth (Bi)films [1]. Despite the researches of spectroscopy and transport experiments, the previous results have remained contradictions, indicating an interesting mechanism behind.
In the present research, we revealed an unexpectedmechanism of the transition in Bi by combining of highresolution measurements of angle-resolved photoemission
spectroscopy (ARPES) on high-quality films and the densityfunctional theory (DFT) calculations [2]. Figure 1 (a) shows
peak-enhanced ARPES images resolving all quantizedbulk bands and surface bands. One can see that the top
quantized levels are clearly shifting below the Fermi levelwith decreasing thickness. This is the first direct observationof the QSE-induced transition into an insulating phase in Bi
films.

Fig. 2. (a) Schematic of a self-consistent cycle for a total charge density
and an effective confinement potential. (b) Comparison of experimental
thickness dependence of quantized levels (markers) and a numericalsimulation (solid lines). The inset depicts wave function charactersobtained in the simulation. (c) Schematics of the new class of size
effects driven by increased Coulomb repulsion from surface states.

Fig. 1. (a) Peak-enhanced ARPES images measured on atomically thin
Bi films. 1 bilayer (BL) of Bi corresponds to 3.9 Å. (b) Schematic of
unusual band connections. The number indicates degeneracy of eachband. (c) DFT band structures calculated on a 14 BL Bi slab withenergy shifts manually induced. (d) Wave function characters calculated
for n = 1, 2, 3 quantized states.

The high-resolution ARPES observation reveals an
unusual signature: both of two surface bands connect to the
top quantized bulk band. Because of the presence of surface
states at the top and bottom of a film, these surface bands aredoubly degenerate. Thus, this band connection readily meansthat the top quantized level must be quadruply degenerate.
Although this breakup of conventional quantization rule wastotally unexpected, our first-principles calculations reproduced the behavior. In Fig. 1(c) shows band structures thatare intentionally shifted via modulation of lattice parameters.
In the leftmost panel, quantized energy levels are regularly
ordered, and n = 1, 2, 3 states possess wave function characters expected for ones confined in an ideal quantum well.
From the leftmost to the rightmost panels, the separation
between n = 1 and 2 levels is gradually reduced, and thewave function characters divert from the ideal cases and get
localized near surfaces.
What is the essential mechanism for the unexpectedlevel degeneracy and the bulk-to-surface transformation ofquantized wave functions? In the DFT framework, an effective one-body potential and a total charge density are determined by a self-consistent cycle reflecting Coulomb interaction. From left to right in Fig. 1(c), the occupation of thesurface bands increases and their relative contributions to thetotal charge density increase.
This tendency makes Coulomb repulsion among
electrons compress the total charge density toward the film
center. In the one-body picture of the DFT framework, apotential barrier around the film center is induced by thiscompressed total charge, which creates a double-well potential, as illustrated in Fig. 2(a). Such a double-well potential
supports degenerate ground states whose wave functions are
localized in both wells with opposite parity, which explainsobservations above. Furthermore, experimental thickness
dependence of quantized levels was excellently reproduced
by a numerical simulation using a single-well potential
which gradually deforms into a double well (Fig. 2(b)).
This unprecedented picture naturally reconciles thestrange contradiction observed in previous studies: even if
the top quantized levels can cross the Fermi level, the stateseffectively behave as surface-conducting states, and the film
interior is insulating as observed in transport experiments, as
shown in Fig.2(c). Thus, we established the complete pictureof the half-century problem in Bi, which demonstrates a newclass of size effects driven by increased Coulomb repulsion
from surface states.
References[1] V. B. Sandomirskii, Quantum size effect in a semimetal film. Soviet
Physics JETP 25, 101 (1967).
[2] S. Ito, M. Arita, J. Haruyama, B. Feng, W.-C. Chen, H. Namatame,
M. Taniguchi, C.-M. Cheng, G. Bian, S.-J. Tang, T.-C. Chiang, O.
Sugino, F. Komori, and I. Matsuda, Science Advances 6, eaaz5015(2020).
Authors
S. Ito, O. Sugino, F. Komori, and I. Matsuda

Real-Time Observation of Electronic,
Vibrational, and Rotational Dynamics
in Nitric Oxide with Attosecond SoftX-Ray Pulses at 400 eV
Itatani Group
Attosecond science has made tremendous progress inthe past two decades along with the advance of Ti:sapphirebased ultrafast laser technologies. Intense ultrashort pulses
in visible and near infrared regions are now routinely
produced, which allow to produce attosecond pulses in theextreme ultraviolet (EUV, photon energy <200 eV) by using
the physics of high harmonic generation (HHG). Since the

ISSP Activity Report 201935

maximum photon energy (or the high harmonic cut off) is
scaled by the ponderomotive potential that is proportional
to the square of laser wavelength, intense ultrashort-pulse
IR sources are required to extend the spectral range ofattosecond pulses towards the soft X-ray (SX) range. Suchspectral extension of high harmonics paves a way to elementspecific ultrafast spectroscopy using atomic absorption
edges. The features of atomic selectivity, photon-in/photonout methodology, and the preservation of temporal resolution on the attosecond time scale are attractive to constructattosecond transient spectroscopy that can generally be applicable to atoms, molecules, and condensed matters even in thepresence of strong external fields.
Since 2008, Our group developed a carrier-envelope
phase-stable ultrashort-pulse IR source that used BiB3O6(BiBO) crystals as an optical parametric chirped-pulse
amplification (OPCPA) medium. Because of the extremely
broadband gain of BiBO-OPCPA in 1.2-2.2 μm, we successfully produced CEP-stable sub-two-cycle IR pulses (1.5 mJ,
10 fs) at a repetition rate of 1 kHz [1]. The high pressure
gas cell that is filled with Ne or He gases allow to generate
attosecond continua that cover nearly all of the water
window.
Using the BiBO-OPCPA and a high-pressure He target(2.4 bar), we demonstrated attosecond SX spectroscopyof NO molecules that were exposed to intense IR fields
as shown in Fig. 1 [2]. The output from BiBO-OPCPA(1.6 µm, 10 fs, 1.5 mJ, 1 kHz, CEP stable) was split to pumpand probe pulses. The pump pulses induced field ionization,
followed by multi-scale coherent dynamics in NO molecules.
The probe pulses produced attosecond SX pulses thatmonitored the unoccupied energy levels by inner shell excitation. The transmitted SX spectra were then recorded with agrating-based spectrometer with a back-illuminated x-ray
CCD camera.
Figure 2(a) shows the measured transient differential
absorbance of NO (pump intensity: ~1×1014 W/cm2). The
static absorbance of NO without the pump pulses is shownin Fig. 2(b). The main feature in Fig. 2(a) is the appearanceof upshifted absorbance of the 1s-2π peak at 402.5 eV whenthe IR pulse precedes the SX pulse. This upshift comes fromNO+ generated by tunnel ionization. Figure 2(c) shows thedifferential absorbance at 403.1 eV around the time origin(pump intensity: ~2×1014 W/cm2). A step-like absorbanceincrease with a period of 2.7 fs (half cycle of the pumpIR pulse) was observed. These steps are characteristic oftunnel ionization. Figure 2(d) shows the oscillation of thecentral energy of the NO+ 1s-2π peak with a period of 14.5 ±0.1 fs. Figure 2(e) shows the differential absorbance of theNO 1s-2π peak (pump intensity: ~1×1014 W/cm2). The peakstructure around 100 fs can be explained by laser-induced
molecular alignment. As far as we know, this attosecond

Fig. 2. (a) Time-resolved absorption spectra of NO. (b) Static absorbance of NO without the pump pulses measured in our experiment(blue circles) and a synchrotron (red curve). (c) Absorbance changeof the NO+ 1s-2π peak at 403.1 eV (red circles) and its 3-point rolling
average (red curve). (d) Central energy of the NO+ 1s-2π peak (redcircles) and the fitting by a cosine and Gaussian function (red curve).
(d) Absorbance change of the NO 1s-2π peak (398.7 to 400.6 eV) withparallel (red circles) and perpendicular (blue circles) IR and SX polarizations. The solid curves are calculation results considering molecularalignment. The pump intensity is ~1×1014 W/cm2 for (a, b, d, e) and~2×1014 W/cm2 for (c). The polarizations of the IR and SX are parallelfor (a, c, d).

transient spectroscopy is at the highest photon energy, andthe first experiment to measure the field-induced alignmentof molecular ions.
Attosecond transient spectroscopy of NO molecules
reveals that the absorption spectra near the nitrogen K-edge(~400 eV) allow to capture full quantum dynamics (i. e.,electronic, vibrational, and rotational dynamics) with a single
spectrogram. These results show that attosecond soft-x-ray
absorption spectroscopy is a powerful technique to trace themolecular dynamics of various freedoms in a different timeand energy scales.
References[1] N. Ishii, K. Kaneshima, T. Kanai, S. Watanabe, and J. Itatani,
J. Opt. 20, 014003 (2018).
[2] N. Saito, H. Sannohe, N. Ishii, T. Kanai, N. Kosugi, Y. Wu,
A. Chew, S. Han, Z. Chang, and J. Itatani, Optica 6, 1542 (2019).
Authors
N. Ishii, K. Kaneshima, T. Kanai, S. Watanabea, N. Saito, H. Sannohe,
N. Kosugib, Y. Wuc, A. Chewc, S. Hanc, Z. Changc, and J. Itatani
aTokyo University of SciencebInstitute of Materials Structure Science, High Energy Accelerator
Research OrganizationcUniversity of Central Florida

Efficient Terahertz Harmonic Generation
with Coherent Acceleration of Electrons
in the Dirac Semimetal Cd3As2
Matsunaga, Tsunetsugu, and Itatani Groups

Fig. 1. (a) Schematic of the experimental setup. (b) Typical SX
spectrum obtained by HHG in Helium.

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ISSP Activity Report 2019

Intense waveform-controlled light field has revealed
highly-intriguing nonlinear and nonperturbative light-matterinteractions such as high-order harmonic generation (HHG).
Recently, HHG in solids with mid-infrared (IR) excitation
has been reported, opening a new route toward laser-based
stable and compact extreme ultraviolet (EUV) sources.
Meanwhile, in the long wavelength limit, efficient third
harmonic generation (THG) in the terahertz (THz) frequency
regime has also been reported in a superconducting film[1]. Realization of such extreme nonlinear photonics in theTHz region at room temperature is highly desired for highspeed THz electronics and for nonlinear frequency mixing insensitive detection of cosmic microwave background. Fromthese perspectives, graphene has attracted tremendous attention as a candidate for efficient THz frequency multiplication using massless Dirac electrons because the current flow
across the Dirac node in the momentum space is expected to
exhibit remarkably large nonlinearity [2], as schematicallyshown in Fig. 1(a). Very recently, HHG in the THz frequency
range in graphene was clearly demonstrated by using a very
intense light source that is based on a large-scale electron
accelerator [3]. In their experiment, the nonlinear coefficients in graphene were found to be much larger than typicalmaterials, whereas the conversion efficiency is still limited
by its monolayer nature.
In our work [4], we investigated THz nonlinear spectroscopy for thin films (thickness of 240 nm) of the three-dimensional Dirac semimetal Cd3As2 at room temperature using alaboratory-scale laser source. We have observed intense THz
pulse generation using this laser-based setup and performed
nonlinear transmission spectroscopy of quasi-monochromatic
intense THz pulse with the center frequency of 0.8 THz [4].
Figure 1(b) shows the results of the spectral amplitude fortransmitted pulses. A sharp peak of THG is clearly observed
at 2.4 THz, which demonstrates the efficient nonlinear
frequency conversion of the THz light. For comparison, we
examined monolayer graphene with the same excitation
condition, and also observed the THG signal. The nonlinear
coefficient for graphene was estimated as ~10-9 m2V-2, whichis consistent with the previous literature, and several ordersof magnitude larger than typical materials. Compared tographene, the conversion efficiency in Cd3As2 is much larger
due to the film thickness, and the observed THG field amplitude is ~100 V/cm under the pump field of 6.5 kV/cm inside
the film. In the next step, we can reduce the Fresnel reflection loss at the sample surface by using an antireflection
coating on the film or directly applying the field via contact
electrodes, which will allow to generate further stronger
harmonics for realistic applications in ultrafast electronics.
To understand the efficient HHG mechanism in Cd3As2
in a microscopic picture, we also performed THz pump-THz
probe spectroscopy. In the case of graphene, the origin of
the THz HHG was successfully explained by a thermodynamic model where electrons were assumed to be in quasiequilibrium with repeating heating and cooling processes
very rapidly within the THz timescale [3]. However, sucha picture of incoherent electron dynamics is essentiallydifferent from the originally proposed scheme to induce
large nonlinearity in massless Dirac systems [2]. Our timeresolved THz spectroscopy in this work has revealed thatthe relaxation rate of the carriers in Cd3As2 is ~8 ps, which

Fig. 2. (a) Pump THz field waveform (upper). THz pump-THz probe
signal as a function of the pump-probe delay time with different polarization configurations. (b) Calculated THG amplitude in the intraband
acceleration model as a function of the scattering time.

is much longer than one optical cycle of the pump field(1.25 ps) in contrast to the rapid cooling in graphene (<< 1ps). We performed the thermodynamic-model calculationand confirmed that this model cannot reproduce the efficient
THG with realistic parameters.
In addition, we experimentally investigated the electron
dynamics during the THz wave irradiation and found that thenonlinear response manifests itself almost only for the pumppolarization direction, as shown in Fig. 2(a). The result canbe well explained by the intraband current model [2]. Whenelectrons are accelerated by the pump field, the electron
distribution function in the momentum space moves rapidly
back and forth along with the pump polarization direction,
but it appears as if “nothing happens” in other probe polarization directions, which was observed as the anisotropic
nonlinearity. We also calculated the nonlinear current byconsidering the intraband acceleration in a simple linear
dispersion model and confirmed that the intraband acceleration model can reproduce the value of the THG amplitude
and its saturating behavior which we observed.
Our results show that, even though the scattering time of~145 fs in Cd3As2 is still shorter than the pump field cycleof 1.25 ps, the nonlinear response is well described by the
intraband current by coherent acceleration of electrons. It
can be explained by the fact that asymmetric non-thermal
electron population distribution in momentum space canbe developed as rapidly as in ~85 fs. Figure 2(b) shows thecalculated result of the THG amplitude as a function of thescattering time. If the scattering time is as long as 100 fs, theTHG amplitude strongly saturates. Therefore, the scattering
time of 145 fs in this material is “long enough” for nonperturbative intraband acceleration driven by the optical field of
a few-kV/cm.
In future, even longer scattering times might be achievedin other topological semimetals with massless dispersion,
which will allow us more efficient frequency conversion,
perhaps at sub-kV/cm field strength. Our results will open a
new pathway towards a novel frequency convertor in the THz
frequency based on Dirac semimetals.
References[1] R. Matsunaga et al., Science 345, 1145 (2014).
[2] S. A. Mikhailov, Europhys. Lett. (EPL) 79, 27002 (2007).
[3] H. A. Hafez et al., Nature 561, 507 (2018).
[4] B. Cheng†, N. Kanda†, T. N. Ikeda, T. Matsuda, P. Xia, T.
Schumann, S. Stemmer, J. Itatani, N. P. Armitage, and R. Matsunaga,
Phys. Rev. Lett. 124, 117402 (2020). (†: equal contribution)

Fig. 1. (a) A schematic of high harmonic generation due to the coherent
acceleration of Dirac electrons. (b) Amplitude spectra of the transmitted
intense THz pulse with appearance of the THz THG in Cd3As2 thin
film.

Authors
B. Chenga,†, N. Kanda†, T. N. Ikeda, T. Matsuda, P. Xia, T. Schumannb,
S. Stemmerb, J. Itatani, N. P. Armitagea, and R. Matsunaga (†: equal
contribution)aThe Johns Hopkins University
bUniversity of California

ISSP Activity Report 201937

Observation of Terahertz Anomalous
Hall Effect in Weyl Antiferromagnet
Mn3Sn Thin Films
Matsunaga and Nakatsuji Groups
Control of magnetism has been a key issue for modern
data processing and recording in spintronic devices. Fromthe viewpoint of manipulation speed, antiferromagnets arepromising materials because spin precession motion occurs
typically at terahertz (THz = 1012 per second) frequencies, a
few orders of magnitude higher than ferromagnets. Readoutof the magnetization information in antiferromagnets is,however, still very difficult since they are generally not sensitive to the external field because of the much smaller net
magnetization than in ferromagnets, which has made theirpractical application challenging. In 2015, Nakatsuji groupin ISSP has discovered large anomalous Hall effect (AHE) inan antiferromagnet Mn3Sn at room temperature comparable
to ferromagnets in spite of the vanishingly-small net magnetization [1]. The exceptionally-large response originatesfrom an inverse-triangular spin structure where the spins
form a 120-degree order with negative vector chirality in theab plane. Such noncollinear antiferromagnetic spin orderin the Kagome bilayer is characterized by cluster magnetic
octupole moments, which macroscopically breaks timereversal symmetry. Deep understanding of the dynamical
properties of Mn3Sn in the THz frequency range is highly
desired for ultrafast readout of the antiferromagnetic spinorder to develop novel functional devices.
In another point of view, Mn3Sn has also been interested
as a possible candidate for Weyl semimetals with broken
time-reversal symmetry, or “Weyl (antiferro)magnets”, whichhost massless electron dispersions with opposite chirality
in the vicinity of the Fermi energy [2]. Since the ac anomalous Hall effect is directly related to the interband excitation
across the Weyl nodes, a number of theoretical efforts havebeen recently devoted to investigating the ac anomalous Hall
conductivity in σxy(ω) Weyl semimetals. Investigating σxy(ω)

Fig. 1. (a) A schematic of THz wave polarization rotation in Mn3Sn
thin films depending on the antiferromagnetic spin order. (b)The experimental results of the polarization rotation spectra with different antiferromagnetic spin orders.

Fig. 2. (a) Frequency dependence of real- and imaginary-part anomalous Hall conductivity, indicating non-dissipative and dissipative part,respectively. (b) Temperature dependence of the real-part anomalous
Hall conductivity.

38

ISSP Activity Report 2019

experimentally is therefore important for understanding
novel electromagnetic responses related with the Berrycurvature in Weyl semimetals.
Frequency dependence of the AHE can be observed in
an optical method by measuring the polarization rotation oftransmitted light. It is based on the relation between σxy(ω)
and the polarization rotation angle θ(ω):σxy(ω)Z0dθ (ω) + iη(ω) = ⎯⎯⎯⎯⎯⎯⎯⎯
1 + ns + σxy(ω)Z0d
where η(ω) an ellipticity angle, d the film thickness, Z0 thevacuum impedance, ns the substrate refractive index, and σxx
the longitudinal conductivity. In the present work, we developed polarization-resolved THz time-domain spectroscopy
setups with precise polarization resolution up to 0.05 mradin 0.5-2.0 THz frequency window for 20-min accumulation
time [3]. Figure 1(a) shows a schematic of our measurement.
Using Mn3Sn thin films with 50-200 nm thicknesses [4],we clearly observed the polarization rotation of transmitted
THz wave at room temperature and zero magnetic field asshown in Fig. 1(b), depending on the direction of the cluster
magnetic octupole moments. The result quantitatively agrees
with the large AHE previously reported in the DC resistivity
measurement.
We also performed the polarization-resolved THz
spectroscopy with broad band frequency range up to 6 THz(25 meV) [3]. Figure 2(a) shows the result of real- andimaginary-part σxy(ω), corresponding to the non-dissipativeand dissipative Hall current, respectively. The results demonstrate small dissipation in the AHE up to THz frequencies,
which is consistent with an intrinsic origin of it. Figure 2(b)shows the temperature dependence of σxy(ω). The strong
suppression of σxy(ω) below 250 K is consistent with thespin-reorientation phase transition from the inverse-triangular structure to a helical spin ordering along the c-axis.
The development of the helical spin ordering along the c-axis
recovers the macroscopic time-reversal symmetry, which
results in the disappearance of the AHE.
The observation of the THz AHE at room temperaturedemonstrates the ultrafast readout for the antiferromagnetic
spintronics using Mn3Sn. Our all-optical approach in anoncontact way with picosecond time resolution also opens
a new avenue for studying nonequilibrium dynamics in Weyl
antiferromagnets.
References[1] S. Nakatsuji, N. Kiyohara, and T. Higo, Nature 527, 212 (2015).
[2] K. Kuroda et al., Nature Mater. 16, 1090 (2017).
[3] T. Matsuda, N. Kanda, T. Higo, N. P. Armitage, S. Nakatsuji, and R.
Matsunaga, Nature Commun. 11, 909 (2020).
[4] T. Higo, D. Qu, Y. Li, C. L. Chien, Y. Otani, and S. Nakatsuji, Appl.
Phys. Lett. 113, 202402 (2018).
Authors
T. Matsuda, N. Kanda, T. Higoa, N. P. Armitageb, S. Nakatsuji, and R.
Matsunaga
aCREST, Japan Science and Technology Agency
bThe Johns Hopkins University

Photoinduced Possible Superconducting
State with Long-Lived Disproportionate
Band Filling in FeSe
Okazaki Group
Photoexcitation is a very powerful way to instantaneously
drive a material into a novel quantum state without any fabrication, and variable ultrafast techniques have been developed to observe how electron, lattice, and spin degrees of
freedom change. One of the most spectacular phenomena is
photoinduced superconductivity, and it has been suggested incuprates that the transition temperature Tc can be enhanced
from the original Tc with significant lattice modulations.
Here, we demonstrate the possibility for another photoinduced high-Tc superconducting state in the iron-based
superconductor FeSe using time- and angle-resolved photoemission spectroscopy (TARPES) [1]. We find that a photoinduced superconducting gap appears as a result of significant lattice modulation. Our demonstration of how we canchange electron- as well as lattice-structure in FeSe by strong
photo-excitation provides important insight into the nextgeneration devices using photo-induced superconductors,
e.g. ultrafast switches or quantum engineering.
Figures 1a and 1b show the time-dependent oscillatory components of the photoemission intensity integrated
above the Fermi level (EF) after photo-excitation for the holeand electron Fermi surfaces (FSs), respectively. The fits bysinusoidal functions are shown as black solid lines. The clear
appearance of single cosine-like signature is noticed both forthe hole and electron FSs. The frequency of this oscillationis 5.3 THz, which corresponds to the A1g coherent phononmode shown in Fig. 1c. Moreover, the amplitude of theoscillation significantly increases with the increase of pumpfluence shown in Fig. 1d. These signatures indicate that theobserved coherent phonons is explained by the displacive
excitation mechanism, in which coherent phonons are generated as a result of the photo-induced modulation of the lattice
structure.
In order to study the photo-induced electronic state inmore detail, we further conducted long time-scale measure-Fig. 2. a, b. Shifts of the leading-edge midpoints (LEM) as a functionof time and pump fluence for the hole and electron FSs. In Fig. 2b, theaveraged superconducting gap, <∆> is shown as black solid lines andmarkers. c. Illustration of photoinduced LEM shifts for the hole (Г) andelectron (M) bands. |G> and |E> represent the ground and photoexcitedstates, respectively.

ments. Figures 2a and 2b show the photo-induced leadingedge midpoint (LEM) shifts for the electron and holes FSs as
a function of time and pump fluence, respectively. One cannotice that the LEM shift at the hole FS is negative, while theLEM shift at the electron FS is negligibly small. This unbalanced shift is due to disproportionate band filling schematically shown in Fig. 2c. It is of note that the disproportionate
band filling lasts for a quite long time of ~1ns owing to theindirect semimetallic band structure, where the electron-hole
recombination must accompany the assistance of phonons
with a large momentum.
The origin of the disproportionate band filling is most
likely ascribed to the emergence of photo-induced superconducting gap because FeSe has no other competing orders
such as the anti-ferromagnetic order in the equilibrium state.
To further investigate the photo-induced superconducting
gap, we extract the superconducting gap and performed
photo-intensity dependent measurements, as shown in
Fig. 2b. We find that with increasing photo intensity, thesuperconducting gap also increases, which suggests that theenhancement of superconducting order is enabled by tuning
light intensity.
In summary, our finding of the possible photo-induced
superconducting state for FeSe can provide another platformof photo-induced superconductivity. The significant property
in this system is the longevity of the photo-induced state,
which is also called metastable. According to the report inphoto-induced superconducting state in cuprates, the carrier
lifetime of FeSe is more than two orders of magnitude longer
than that of cuprates. In terms of device applications, thissignature is quite powerful because one can perform multiple
and complicated processes during this metastable state.
Reference[1] T. Suzuki, T. Someya, T. Hashimoto, S. Michimae, M. Watanabe,
M. Fujiwara, T. Kanai, N. Ishii, J. Itatani, S. Kasahara, Y. Matsuda,
T. Shibauchi, K. Okazaki, and S. Shin, Communications Physics, 2,
115 (2019).

Fig. 1. a, b. Oscillatory components for the time-dependent photoemission intensities integrated above Fermi Energy for the hole and electron
Fermi surfaces. c. Illustration of lattice modulation by photoexcitation,corresponding to A1g phonon mode. d. Fast Fourier transform (FFT)
amplitude at 5.3 THz for the hole and electron FSs as a function of thepump fluence.

Authors
T. Suzuki, T. Someya, T. Hashimoto, S. Michimae, M. Watanabe,
M. Fujiwara, T. Kanai, N. Ishii, J. Itatani, S. Kasaharaa, Y. Matsudaa,
T. Shibauchib, K. Okazaki, and S. ShinaKyoto University
bThe University of Tokyo

ISSP Activity Report 201939

Joint Research Highlights
Heavy Fermion State of YbNi2Si3
without Local Inversion Symmetry
S. Nakamura, T. Sakakibara, and M. Yamashita
Various fascinating phenomena often appear in thematerials without the global inversion symmetry. It istheoretically suggested that both global and local inversionsymmetry-breaking host an exotic superconductivity. This
study focuses on the materials in which only the local inversion symmetry is broken. There are not much examples
showing superconductivity in the materials without the local
inversion symmetry, but the local inversion symmetry is
broken in high temperature superconductors such as ironbased and copper-oxide superconductors.
We discover a new heavy-fermion compound YbNi2Si3
in which the local inversion symmetry at ytterbium site is
broken (Fig. 1(a) and (b)), whereas the global inversion
symmetry is retained. The space group of this material is I4/
mmm, and the site symmetry at Yb-ion is 4mm. This crystal
structure is partially similar to tetragonal ThCr2Si2-type
crystal structure; CeCu2Si2 and URu2Si2 are well known as
heavy-fermion superconductors. Rare-earth metal, transition
metal, and silicone atoms form a square lattice on the c planeboth in these two crystal structures.
The electrical resistivity, the magnetization, the magnetic
torque and the heat capacity measurements have been
performed in YbNi2Si3, and we check if there is a superconducting state without the local inversion symmetry. We

Fig. 2. (a) The temperature dependence of the heat capacity of YbNi2Si3
at zero magnetic field. (b) The magnetic field dependence of themagnetic torque of YbNi2Si3 at 208 and 2 mK.

determine the H–T phase diagram of YbNi2Si3 by the magnetization and the heat capacity measurements (Fig. 1(c)). We
find an antiferromagnetic state appears below 0.35 K at zeromagnetic field, and it is suppressed by applying a magnetic
field of 0.7 T. The temperature dependence of the electricalresistivity shows a typical heavy-fermion behavior with the
Kondo temperature of ~ 2 K. Remarkably, a large electronic
specific heat coefficient of γ = 5 J/mol K2 is found to remain
down to 0.08 K in the antiferromagnetic state (Fig. 2(a)),
demonstrating a heavy-fermion state in YbNi2Si3. Such large
entropy is often released by a superconducting transition ata lower temperature. To this end, we have carried out themagnetic torque measurements down to ultralow temperatures. However, no discernible change is observed down to
2 mK (Fig. 2(b)), showing the persistence of the heavyfermion state. We further check the valence state of the Yb
ions via hard X-ray photoemission spectroscopy, and findthat almost all the Yb-ions are in the Yb3+ state, showing theabsence of the valence fluctuation between Yb2+ and Yb3+.
This absence would suggest that the origin of the heavyfermion state is a magnetic fluctuation rather than a valencefluctuation, which often expected in Yb compounds. It
remains as a important future issue to reveal the origin of theheavy-fermion state in YbNi2Si3 by microscopic measurements such as NMR.
Reference[1] S. Nakamura, K. Hyodo, Y. Matsumoto, Y. Haga, H. Sato, S. Ueda,
K. Mimura, K. Saiki, K. Iso, M. Yamashita, S. Kittaka, T. Sakakibara,
and S. Ohara, J. Phys. Soc. Jpn. 89, 024705 (2020).
Authors
S. Nakamuraa, T. Sakakibara, and M. YamashitaaNagoya Institute of Technology

Fig. 1. (a) The crystal structure of YbNi2Si3 in which the local inversion
symmetry around the Yb ions is broken as shown in (b). (c) The H-T
phase diagram, where TN and Tmax denote the Néel temperature and acrossover line between paramagnetic and forced ferromagnetic regions,
respectively.

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ISSP Activity Report 2019

Patterning of TopologicalInsulator on Thin Film
H. Mine, J. Haruyama and T. Nakamura
Because topological insulators (TIs) have theirconducting channels at the sample edges, shapes of themplay crucial roles in device applications. Hence it can be avery convenient tool if we can “draw” spatial patterns of TI
just like drawing a picture. Members of two-dimensional(2D) transition metal dichalcogenides (TMDCs) have been
predicted and experimentally confirmed as a new class of
2D TI materials though the edge conduction is fragile inmost cases. Here, we realize the controlled patterning of a TI
phase embedded in an insulating phase of thin molybdenumdisulfide (MoS2) by laser beam irradiation.
MoS2 is known to have various metastable lattice structures according to the freedom in the stacking angle of thechalcogen layer. In so called H-phase, the chalcogens form
triangle poles or trigonal prism. In single crystal, two-layers
form a unit and called 2H phase. This is semiconducting.
In so called T-phase, the two-triangles are in the twisted
relation. The stacking unit is single and called 1T phase. Thisis metallic. These two are the representative phases but there
are many other metastable phases.
An interesting is the one called 1T’ phase, which issomewhat intermediate between these two. In this 1T’ phase,for example this upper chalcogen atoms shift in this way andstop at some intermediate position. Some theories predict
this 1T’ phase should be a topological phase. So if we cancause local phase transition between these three, we canmake up desired circuits with semiconductors, metals andtopological insulators. We showed that 1T’ phase can be
actually created in 2H MoS2 and also it works as a TI [1].
In order to obtain 1T’, we used the excitation by Ar laser
beam of energy 2.5 eV and simply drew some patterns on
2H MoS2. From an atomic force microscope topography, it

Fig. 2. Resistance of laser irradiated pattern on MoS2 as a functionof back gate voltage. In the inset we illustrate the setup of resistancemeasurement.

turned out that the irradiated region is a bit thinner than thesurrounding region. This is probably due to some evaporation of atoms and the phase transition is not due to the directenergy transfer from photon to lattice but some heating
effect causes the transition. The appearance of 1T’ phase wasconfirmed in the Raman and the XPS spectra as shown in
Fig. 1 (a) and (b).
The pattern of 1T’ phase we used for the measurement ofedge channel conduction is a simple H-shape as illustrated in
the inset of Fig. 2. The size is about 2 μm, which is comparatively large compared with ordinary reported coherence
length of edge conductions in TIs. The flake of MoS2 wasplaced on a metallic doped Si substrate covered with SiO2,
hence we can tune the position of Fermi energy in MoS2
wtih the back gate voltage. Figure 2 shows the resistance ofH-shaped sample in the measurement geometry drawn in
the inset, as a function of the back gate voltage. The resistance R took a peak structure around at R = Rq / 2 = h / 2e2 =12.6 kΩ. This is the value calculated for ideal helical edge
states and clearly tells that the patterned 1T’ was working asa TI. The resistance quantization persisted surprisingly up to
room temperature manifesting an opening of large spin-orbit
energy gap. The gap closing around the sample edges was
also confirmed with a scanning tunneling spectroscopy.
Reference[1] H. Mine, A. Kobayashi, T. Nakamura, T. Inoue, S. Pakdel,
D. Marian, E. Gonzalez-Marin, S. Maruyama, S. Katsumoto, A.
Fortunelli, J. J. Palacios, and J. Haruyama, Phys. Rev. Lett. 123,
146803 (2019).
Authors
H. Minea, J. Haruyamaa, T. Nakamura, and S. Katsumoto
aAoyama Gakuin University

Electronic Structures of 4º-Twisted Bilayer
Graphene Fabricated in a Vacuum
S. Tanaka and F. Komori

Fig. 1. (a) X-ray photoelectron spectroscopy taken at a laser-irradiatedregion (black line). Red and blue lines are those expected for 1T’and 2H phases respectively.(b) Raman shift spectra. Blue: 2H phase
before laser irradiation. Red: mixture of 1T’ phase and 2H phase after
irradiation.

Twisted bilayer graphene (TBG) is a stacked twographene sheets with mutually in-plane rotation, and exhibits
electronic states different from those observed in a typicalbilayer graphene with Bernal stacking. Its Fermi velocity inthe vicinity of the Dirac point strongly depends on the twistangle θ below 10º [1], and vanishes around a magic angle ofθ ~ 1.1º [2]. At this magic angle, a flat band with extremely
sharp density of states is thus realized, and its electronic

ISSP Activity Report 201941

Fig. 1. (a) LEED pattern at the area with TBG. Bright 12 spots are
identified as two sets of 6-fold symmetric graphene diffraction spots
from the lower (gCVD) and upper (gtr ) layers. Inset shows the magnified
image of the graphene diffraction including satellite spots (circles) due
to the moiré structure. (b) STM image taken at the TBG area, showing
graphene atomic image and moiré lattices. Moiré unit cell of the lattice
is indicated by arrows. The image was taken at the sample bias voltage
0.8 V and tunneling current 0.5 nA at 80 K [3].

properties have attracted much attention. TBG is usually
prepared by stacking mechanically-exfoliated graphenesheets in air, and thus it is difficult to prepare a millimeterscale samples with clean interface between the sheets forusing standard surface analysis techniques such as various
diffraction methods and high-resolution photoemission
spectroscopy. To prepare wide TBG’s with clean interface,
we have developed a new method of directly bonding clean
graphene sheets in a vacuum without any chemical adhesion
and transmission media. For this purpose, we use monolayer
graphene that can be easily exfoliated from the SiC substrate[3]. The band structure observed by angle resolved photoemission spectroscopy (ARPES) exhibits changes of theelectronic states due to the interlayer interaction [1].
Graphene sheets are made on a 4H-SiC (0001) substrateby chemical vapor deposition (CVD) using ethylene. A
buffer layer with a 3 × 3 periodicity is formed at the interface between the graphene and substrate, and allows us to
exfoliate the graphene layer easily. It is noted that graphene−−on the thermally decomposed 6√3 × 6√3 -R30º buffer layer(6R3) coexists. The TBG samples are prepared at 200 ºC
in a vacuum by pressing together for 1 hour and detachedat the same temperature. The samples were then evaluatedby optical microscope, μ-Raman spectroscopy, low energy
electron diffraction (LEED), scanning tunneling microscopy(STM) and ARPES. Sub-millimeter areas with TBG wereconfirmed on the substrate.
Observed LEED and STM images of a 4º-rotated TBG
are shown in Fig. 1. Two sets of 6-fold bright graphene spots
with surrounding satellite spots are seen in Fig. 1(a), andcorrespond to lower-layer (gCVD) and upper-layer transferred (gtr) graphene. In the STM image, a moiré pattern
due to the twisted layers is observed with the graphenelattice. The twist angle θ is estimated from the satellite-spot
periodicity and the moiré image. Graphene band structures
measured by ARPES at 300 K using 52 eV synchrotron light(KEK-PF, BL13) are shown in Fig. 2. Two graphene Diraccones appear at Fermi energy (EF) as in Fig. 2(a). The band
structure shown in Fig. 2(b) indicates the both graphene
layers are p-doped. The cone at negative ky originates fromthe transferred graphene on the 3 × 3 substrate. In addition,an n-doped Dirac band is seen in Fig. 2(b), which originatesfrom the transferred graphene on the 6R3 substrate. Energy
gap of the bands due to the interlayer interaction is found at
ky = 0 in the same figure. The Dirac band shown in Fig. 2(b,right) has a kind structure at 0.2 eV.
References[1] J. M. B. Lopes dos Santos et al., Phys. Rev. Lett. 99, 256802(2007).
[2] R. Bistritzer, and A.H. MacDonald, Proc. Natl. Acad. Sci. U. S. A.
108, 12233 (2011).
[3] H. Imamura et al., Appl. Phys. Express 13, 075004 (2020).
Authors
H. Imamuraa, A. Visikovskiya, R. Uotania, T. Kajiwaraa, H. Andoa, T.
Iimori, K. Iwata, T. Miyamachi, K. Nakatsujib, K. Masec, T. Shirasawad, S. Tanakaa, F. Komori
aKyushu University
bTokyo Institute of Technology
cKEK & SOKENDAIdAIST

Pulsed Laser Deposition with
Rapid Target Switching
Y. Matsumoto and M. Lippmaa

Fig. 2. ARPES constant energy and band dispersion maps. The kx axis
is on the line between the middle of the two K points of the graphene
layers (KCVD, Ktr) and Γ point. (a) Constant energy maps at EF without(left) and with (right) image enhancement. Replica bands are seen at
this energy as in left. (b) Band dispersions along ky axis at kx = 1.695
Å-1 (left) and along kx axis at ky = - 0.069 Å-1 (right). Here, the ARPES
intensity is normalized by the Fermi-Dirac distribution function at 300
K. Two Dirac bands of the transferred graphene are seen at negative ky
in the left figure [3].

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ISSP Activity Report 2019

Pulsed laser deposition (PLD) is one of the most common
techniques for growing complex oxide thin films. The
biggest merit of PLD is the near-stoichiometric transfer ofmaterial from a polycrystalline ceramic target to a singlecrystalline thin film, which means that it is usually notnecessary to tune individual cation ratios during the crystal
growth process. Indeed, PLD became the method of choicefor developing high-temperature superconductor thin films
and devices due to the simplicity of phase and stoichiometry
control.
The PLD process is based on the use of a high-intensity
pulsed laser that momentarily heats the surface of a ceramicsource material pellet, forming a rapidly expanding plasma
cloud in vacuum or in a low-pressure reactive gas ambient.

Due to the pulsed nature of the process, the surface of a
growing film reaches a high level of supersaturation when
the plasma plume arrives, but this very high instantaneousdeposition rate is followed by a long relaxation period of up
to about a second. The dynamic aspect of the crystal growthis therefore also important in determining the growth modeand crystallinity of a film.
In recent years, there is increasing interest in materials
property mapping and the use of combined computationaland experimental materials data to feed machine learningmodels for aiding materials discovery and optimization.
In thin film property mapping experiments, it is necessary
to grow large numbers of thin film samples with slightly
different compositions. In a traditional PLD process, thiswould require the synthesis of a large number of bulk
compositions for use as PLD ablation targets, which istechnically difficult. Multi-target PLD has been used to
avoid this problem by using just two ablation targets to growmixed-composition phases. For example, by alternating
ablation from SrTiO3 and BaTiO3 targets, it is possible togrow any intermediate composition in the Ba 1-xSrxTiO3
phase space. Since each unit cell layer usually requires up toa hundred ablation pulses to grow, it is easy to adjust compositions on a percent scale. However, switching between twotargets generally requires mechanical motion of the target
stage, which is a slower process than the normal ablation
pulse period. Since adatom surface migration during theinterpulse period affects the film microstructure, the longer
time delay of target exchange may lead to a nanoscale multiphase film of, e.g., SrTiO3 and BaTiO3 domains instead of amixed Ba1-xSrxTiO3 crystal.
In this project, supported by the Joint Use program,a rapid beam deflection system was developed to switch
ablation between two target materials on a millisecond scale.
[1] The experimental setup is illustrated in Figs. 1(a,b). A
galvanometer mirror is used to direct ablation laser pulses on
one of two targets without having to move the target stage.
The mirror motion is fast enough to interleave depositions

from two targets in a 1:1 pulse sequence at laser pulse rates
of up to 200 Hz.
Various film synthesis experiments were used to test thebenefits of rapid sequential deposition of various mixedcomposition oxide films. The experiments clearly showed thebenefit of rapid target switching in synthesizing (Ba,Sr)TiO3,(Bi,Sm)FeO3, (Mg,Zn)O, Ni-Ge, and Ni-Si films. A particularly interesting capability of this new rapid target switching
PLD system is depth direction grading of film composition for tuning the lattice parameter, doping level, crystal
symmetry, or other properties without sacrificing the deposition rate or risking phase segregation when slower mechanical target stage motion is used for multi-target deposition.
An example of a depth-graded Ba1-xSrxTiO3 film composition is shown in Fig. 1(c). The Ba content was adjusted
over the 100 nm thickness of the film from 0 to 30% asshown by the design plot (blue) and verified by Secondary
Ion Mass Spectrometry (SIMS) as shown in red. The continuous change of the lattice parameter can be seen in the x-ray
diffraction pattern for a gradient film grown on a SrRuO3electrode layer on a SrTiO3 substrate. The spread of the(Ba,Sr)TiO3 film peak corresponds to the continuous composition gradient in the film. This type of gradient films can beused in novel types of photoelectrochemical electrodes andfor constructing polar films with an internal electric field
gradient related to the depth-variable polarization of thelattice.
References[1] S. Maruyama, N. Sannodo, R. Harada, Y. Anada, R. Takahashi,
M. Lippmaa, and Y. Matsumoto, Rev. Sci. Instrum. 90, 093901 (2019).
Authors
S. Maruyamaa, N. Sannodoa, R. Haradaa, Y. Anadaa, R. Takahashi,
M. Lippmaa, and Y. Matsumotoa
aTohoku University

Density Functional Theory
with Machine Learned Functional
R. Nagai, R. Akashi, and O. Sugino

Fig. 1. (a) Photograph of the ablation target stage, showing the ablation
spot on the lower target. (b) Schematic diagram of the rapid galvanometer beam switching between two targets. (c) Design (blue) andmeasured (red) composition of a (Ba,Sr)TiO3 film. The x-ray diffraction pattern in (d) shows that the film lattice parameter varied continuously in the film.

Modern electronic structure theory of materials is mostfrequently based on the Kohn-Sham density functional
theory (KS-DFT), where the accuracy depends on thequality of the density-to-energy mapping called exchangecorrelation (xc) functional. The mapping has extremely
large degrees of freedom that are too complex to determine
manually. In this context, we have proposed a machinelearning approach [1]. We have prepared the atomizationenergy (Ea) and electron density n(r) of reference molecules
using a quantum chemical simulation and let neural network(NN) learn the data. In the learning, the energy Ea and thedensity n(r) are related via a functional of the density called
the xc potential εxc[n](r), and the parameters characterizing the functional are optimized to best reproduce theinput data. The mapping thus established depends on theform of the functional, such as the point-to-point mapping
called local density approximation (LDA) and the mapping
reinforced using the density gradient called generalized
gradient approximation (GGA) or meta-GGA. Quality of
the functionals was tested for a ten dozen of unreferenced
molecules and was found superior to existing ones foreach form, suggesting possibility to systematically develop
accurate functionals.

ISSP Activity Report 201943

Fig. 1. Machine learning scheme for developing exchange correlation (xc) functional. Referring to electron density n(r) and atomizationenergy Ea of a few molecules, the xc energy was related to the density
as a functional εxc[n](r). With this machine learned functional, n(r) and
Ea of unrefernced materials were found to be predicted more accurately
than with conventional functionals.

In our study, we have used three molecules, H2O, NH3,
and NO, that contain different bonding property and spinpolarization, as the reference. The NN successfully determined the parameters without overtraining owing large
number of data contained in the density, which amounts
to 100,000. We further tried to include nonlocality into thefunctional beyond the gradient approximations by considering the electron density averaged in the vicinity of anelectron. The resulting functional form, called near region
approximation (NRA), improves the accuracy equivalent tothat achieved using the nonlocal exchange, allowing thereby
significantly to reduce the computational complexity.
In view of the ability of artificial intelligence to recognize a picture, it is likely to be possible to learn the chemicalbonds without explicitly indicating a descriptor. Suchadvance in the method will enable a researcher to develop ahigh-quality functional dedicated to the target materials ofinterest with an effect of speed-up of material design. Impact
of systematic functional development is thus expected to belarge in the computational materials science.

ture. So far, first-principles calculations based on density
functional theory (DFT) have been performed extensively for
identifying (meta-)stable structures at T = 0 K. On the other
hand, predicting finite-temperature structures based on DFT
is still challenging because it requires a proper treatment ofentropic effects of phonons and magnons. In particular, thevibrational entropy plays a central role in realizing structural phase transitions of nonmagnetic materials, including
perovskite oxides such as BaTiO3. However, the conventional phonon calculation method based on the harmonic
approximation (HA) often yields unstable phonon modes forhigh-temperature phases of phase change materials, whichhinders an estimation of vibrational entropy.
To overcome the limitation of the conventional phonon
calculation method, we have recently developed a new
approach that is applicable to high-temperature phases [1].
Our method is based on the self-consistent phonon (SCP)
theory, which incorporates the anharmonic renormalizationof phonons at the mean-field level. We have so far employed
the developed SCP scheme to compute finite-temperaturephonons of cubic SrTiO3 [1], thermoelectric clathrate [2],and ScF3 [3], where we have obtained an excellent agreementwith the experimental data. Also, it can be used to computethe vibrational free energy of solid whose structure is dynamically unstable within the HA, as has been demonstrated for
ScF3 [3] and hydrogen-rich superconductors [4].
To further test and improve the prediction accuracy of
our approach, we have recently applied the SCP method toan all-inorganic halide perovskite CsPbBr3, which has been
actively studied in recent years as an efficient photovoltaic material. CsPbBr3 shows a successive structural phasetransition with cooling from cubic α phase (Pm3̄m) to thetetragonal β phase (P4/mbm) at 403 K and then to the orthorhombic γ phase (Pnma) at 361 K. When the HA was used,
we obtained unstable phonon modes for the high-temperaturephases as shown in Fig. 1. These phonon modes involve a
distortive motion of the bromine octahedra; therefore, thesesoft modes, particularly those at the M (1/2,1/2,0) point of
the α phase and the Z (0,0,1/2) point of the β phase, may
act as the soft modes of the structural phase transition. After
including the effect of finite-temperature renormalization by
the SCP theory, all phonon modes were stabilized, as shownby solid lines in Fig.1. After that, we calculated the vibra-

Reference[1] R. Nagai, R. Akashi, and O. Sugino, npj Compt. Mater. 6, 43(2020).
Authors
R. Nagai, R. Akashia and O. Sugino
aThe University of Tokyo

Predicting and Understanding Structural
Phase Transition of Solids fromFinite-Temperature Phonon Calculations
T. Tadano and W. A. Saidi
The study of structural phase transition has been an active
research subject in condensed matter physics and materials
science because a variety of materials’ properties, including
but not limited to transport, optical, and superconducting
properties, often changes sensitively with the crystal struc-

44

ISSP Activity Report 2019

Fig. 1. (Top) Crystal structures of α, β, and γ phases of halide
perovskite CsPbBr3. (Bottom) Phonon dispersion curves of threedifferent phases of CsPbBr3 calculated within the harmonic approximation (dotted lines) and self-consistent phonon method at 500 K (solidlines). The unstable phonon modes in the high-temperature phases(β, γ) are stabilized by anharmonic renormalization at finite temperature.

tional free energies with including the effect of the quartic
anharmonicity [3] and predicted the phase transition temperature (Tc) based on the calculated Helmholtz free energies.
When we used the PBEsol exchange-correlational functional,
the Tc values of the cubic-to-tetragonal and tetragonal-toorthorhombic phase transitions were predicted as Tc ~ 280
K and Tc ~ 180 K, respectively, both of which underestimate
the experimental results. To improve the prediction accuracy,
we have further considered the higher-order correction to thevibrational free energy that originates from the cubic anharmonicity. Then, the Tc value of the cubic-to-tetragonal phasetransition changed as Tc ~ 400 K, which shows better agreement with the experimental value.
We are also interested in how the structural phase transition affects thermal transport properties. To investigate thispoint quantitatively, we have calculated the lattice thermal
conductivity of CsPbBr3 for the three different phases. To
this end, we calculated the phonon lifetimes by considering the three-phonon scattering process on top of the SCP
calculations. After that, the lattice thermal conductivity
was estimated, where both of the particle-like transport andcoherent transport terms were calculated following Ref. [5].
For all phases, the thermal conductivity values were smaller
than 1 W/mK, indicating the strong lattice anharmonicity of
CsPbBr3. We found that the lattice thermal conductivity of
the high-temperature α phase was larger than those of the
low-temperature phases due to the longer phonon lifetimes in
the highly symmetric α phase, which can be attributed to thesmaller scattering phase space of the three-phonon process.
Interestingly, unlike the conventional semiconductors wheremost of the thermal transport is accounted for by the highly
dispersive acoustic phonons, more than ~60% of the total
thermal conductivity was carried by optical phonons above
30 cm-1 in CsPbBr3.
The computational results on CsPbBr3 again highlightthe versatility and efficiency of the SCP theory for studying
lattice dynamics in solids. While it is tempting to state that
the SCP-based approaches are already reliable enough tomake a quantitative prediction of structural phase transitions, many effects are yet to be investigated, including
thermal expansion and choice of the exchange-correlation
functionals. Investigating these effects on a Tc value would
be an important future direction for our forthcoming studies.

Neutron Spin Resonance andHorizontal Line Nodes in Sr2RuO4
K. Iida, K. Suzuki, and T. Masuda
Sr2RuO4 with Tc = 1.5 K has attracted a great deal ofinterest as the prime candidate for the chiral p-wave superconductor. Recently, however, experimental and theoreticalstudies under an application of uniaxial pressure along<100> reported a factor of 2.3 enhancement of Tc, raising
the possibility of an even-parity spin-singlet order parameterin Sr2RuO4 [1]. More recently, new NMR results demonstrated that the spin susceptibility substantially drops below
Tc, ruling out the chiral-p spin-triplet superconductivity [2].
As such, these recent works turn the research on Sr2RuO4
towards a fascinating new era. So far, various experimental
techniques reported that the superconducting gaps of
Sr2RuO4 have line nodes, but the details of the line nodes,
e.g. of the vertical or horizontal nature, are not uncovered
yet. Since the complete information of the superconducting
gaps can shed light on the symmetry of the pairing, exclusive
determination of the direction of the line nodes in Sr2RuO4 ishighly desirable. To investigate in detail the superconducting
gap, we performed the high-resolution inelastic neutron
scattering (INS) measurements and random phase approximation (RPA) calculations.
Three single crystals were co-aligned with the (HHL)
plane been horizontal to the scattering plane using the highenergy x-ray Laue diffractometer installed at ISSP. We
performed INS measurements at 0.3 and 1.8 K using the disk
chopper time-of-flight neutron spectrometer AMATERAS
installed at J-PARC.
The most pronounced magnetic signal in the normal
state of Sr2RuO4 is nearly two-dimensional incommensurate (IC) magnetic fluctuations at QIC = (0.3, 0.3, L) owing
to the Fermi surface nesting between (or within) the quasione-dimensional α and β sheets [3]. We focused on the

References[1] T. Tadano and S. Tsuneyuki, Phys. Rev. B 92, 054301 (2015);
J. Phys. Soc. Jpn. 87, 041015 (2018); J. Ceram. Soc. Jpn. 127, 404(2019).
[2] T. Tadano and S. Tsuneyuki, Phys. Rev. Lett. 120, 105901 (2018).
[3] Y. Oba, T. Tadano, R. Akashi, and S. Tsuneyuki, Phys. Rev.
Materials 3, 033601 (2019).
[4] I. Errea, F. Belli, L. Monacelli, A. Sanna, T. Koretsune, T. Tadano,
R. Bianco, M. Calandra, R. Arita, F. Mauri, and J. A. Flores-Livas,
Nature 578, 66-69 (2020).
[5] M. Simoncelli, N. Marzari, and F. Mauri, Nature Phys. 8, 809-813(2019).
Authors
T. Tadanoa, W. A. Saidib
aNational Institute for Materials SciencebUniversity of Pittsburgh

Fig. 1. (a) Low-energy INS intensity maps regarding the IC magnetic
fluctuations in Sr2RuO4 along (H, H, 0.5). (b) I(ћω) cuts at Q = (0.3,
0.3, 0.5) below and above Tc. (c) I(Q) cuts along Q = (H, H, 0.5) at 0.3
and 1.8 K with the energy window of 0.56 meV. (d) I(Q) cut along Q =(0.3, 0.3, L) at 0.3 K with the energy window of 0.56 meV.

ISSP Activity Report 201945

Large Enhancement of Thermoelectric
Efficiency Due to Pressure-Induced
Lifshitz Transition in SnSe
H. Sakai, M. Tokunaga, and Y. Uwatoko

Fig. 2. Calculated density maps of the dynamical spin susceptibility
assuming the horizontal line nodes in Sr2RuO4 for energy ћω = 2Δ0.

low-energy IC magnetic fluctuations in Sr2RuO4 below
and above Tc to search a spin resonance as the feedback
effect from the superconducting gaps. We observed a spinresonance with energy of ћωres = 0.56 meV centered ata characteristic wavevector Qres = (0.3, 0.3, 0.5) (Figs.
1(a)–1(c)). The resonance energy corresponds well to thesuperconducting gap 2Δ = 0.56 meV estimated by thetunneling spectroscopy. In addition, the spin resonanceshows the L modulation with a maximum at around L = 0.5(Fig. 1(d)), indicating the three-dimensional gap structure.
To theoretically elucidate the origin of the L modulated
intensity of the spin resonance in Sr2RuO4, RPA calculations
assuming the horizontal line nodes at the superconducting
gaps were also performed. Figure 2 illustrates the calculated dynamical spin susceptibilities for energy ћω = 2Δ0.
The dynamical spin susceptibility shows the maximum at
Q = (1/3, 1/3, 0.5) and (2/3, 2/3, 0.5). The superconducting
gaps with the horizontal line nodes give such the feature
along L, which is indeed observed in our INS measurements(Fig. 1(d)).
The L modulation of the spin resonance and our RPA
calculations indicate that the superconducting gaps regarding
the quasi-one-dimensional α and β sheets at the Fermi
surfaces have the horizontal line nodes [4]. These results may
set a strong constraint on the pairing symmetry of Sr2RuO4.
References[1] A. Steppke et al., Science 355, eaaf9398 (2017).
[2] A. Pustogow et al., Nature (London) 574, 72 (2019).
[3] K. Iida et al., Phys. Rev. B 84, 060402(R) (2011).
[4] K. Iida et al., J. Phys. Soc. Jpn. 89, 053702 (2020).

Control of the number of Fermi pockets, i.e., electronic
valleys, in conductive materials has recently attracted agreat deal of attention in terms of the emerging electronics
utilizing valley degrees of freedom. An important physicalaspect of the valley engineering is that the emergence andannihilation of the valleys are described by a topologicalelectronic transition known as Lifshitz transition. The
Lifshitz transition is totally different from the conventional
Landau-type phase transition, because it is not accompanied
by any symmetry breaking. Despite many predictions of its
important roles on various quantum phenomena, the experimental verification has remained challenging.
In this study [1], we have revealed a marked influenceof the pressure-induced Lifshitz transition on thermoelectric
efficiency in SnSe (Fig. 1(a)), which has recently become
the focus of attention for its high thermoelectric performance[2]. Thermopower, which is proportional to the energy derivative of density of states, is anticipated to be an ideal probe
for the Lifshitz transition. However, it has been overlookedso far owing to the lack of a model thermoelectric material,
where the valley state is controllable. Here we have discovered that the band structure as well as thermoelectric performance for SnSe is highly sensitive to the external pressure
by measuring the quantum oscillation of magneto-resistivity
concurrently with the thermopower in a piston cylinder typehigh pressure cell (Fig. 2).
The obtained pressure dependence of the quantum oscillation frequencies clearly indicates that the number of thevalleys increases from two to four at ~1 GPa with increasingpressure (Fig. 1(b) upper panel), as is semi-quantitatively
reproduced by the first-principles calculations. At around 1.6
GPa, the four valleys are almost equivalent in size, where
the thermoelectric power factor is more than 100% higher
than that at ambient pressure over a wide temperature range(10–300 K) (Fig. 1(b) lower panel).
The present result demonstrates the multi-valley state isof great importance for achieving high thermoelectric performance, providing a guide for band engineering for the SnSebased thermoelectric materials. Furthermore, since atomically thin SnSe films have recently attracted much attention

Authors
K. Iidaa,b, M. Kofua,c, K. Suzukid, N. Muraic, S. Ohira-Kawamurac,
R. Kajimotoc, Y. Inamurac, M. Ishikadob, S. Hasegawa, T. Masuda, Y.
Yoshidae, K. Kakuraib, K. Machidad, and S.-H LeeaaUniversity of Virginia
bCROSS
cJ-PARC CenterdRitsumeikan University
eAIST

Fig. 1. (a) Schematic of the layered crystal structure of SnSe. (b) (upper
panel) A schematic illustration of the pressure variation in the valley
topology for SnSe. (lower panel) Pressure dependence of the thermoelectric power factor at 150 and 300 K for SnSe.

46

ISSP Activity Report 2019

Fig. 2. Setup of the thermopower and resistivity measurements underpressure.

as a new 2D material, the controllability of valley structure
presented here may help for exploring their novel functionsin the future electronics.
References[1] T. Nishimura, H. Sakai, H. Mori, K. Akiba, H. Usui, M. Ochi,
K. Kuroki, A. Miyake, M. Tokunaga, Y. Uwatoko, K. Katayama, H.
Murakawa, and N. Hanasaki, Phys. Rev. Lett. 122, 226601 (2019).
[2] L.-D. Zhao, S.-H. Lo, Y. Zhang, H. Sun, G. Tan, C. Uher, C.
Wolverton, V. P. Dravid, and M. G. Kanatzidis, Nature (London) 508,
373 (2014).
Authors
T. Nishimuraa, H. Sakaia,b, H. Moria, K. Akiba, H. Usuia, M. Ochia,
K. Kurokia, A. Miyake, M. Tokunaga, Y. Uwatoko, K. Katayamaa, H.
Murakawaa, and N. Hanasakia
aOsaka University
bPRESTO, JSTcoil (STC) at the ISSP for magnetic field generation and an
infrared CO2 gas laser as the light source. The wavelengths
used were 9.22, 10.48, and 10.6 μm. The laser light shines
the sample and the transmitted light intensity was measured
as a function of time during a pulse of a magnetic field (B)generated by the STC. A high speed HgCdTe PIN photo
diode was used for detection of the light signal. The samples
were grown on a semi-insulating InP (100) substrate, using
a molecular beam epitaxy system. The InxAl1−xAs buffer isgrown at low temperature to help mitigate formation of dislocations originating from the lattice mismatch between the
InP substrate and higher levels of the heterostructure [2]. The
indium content of InxAl1−xAs is step-graded from x = 0.52
to 0.81. Next, a delta-doped Si layer of ~ 7.5 × 1011 cm−2
density is placed here followed by 6 nm of In0.81Al0.19As.
The quantum well is grown next, consisting of a 4 nm thicklayer of In0.81Ga0.19As layer, a 4 nm thick layer of InAs, andfinally a 10 nm thick top layer of In0.81Ga0.19As.
Figure 1 shows the CR spectra at 300 and 20 K. In theupper panel, the CR peaks around 40 T indicated by solid
allows are interpreted as the spin-split resonances : They are
the inter-Landau level transitions between n = 0 and n = 1
with different spin polarization, where n is the Landau levelindex. Another CR peak at around 55 T is, on the other hand,due to the transition between n =1 and n = 2 levels. Whenthe temperature is lowered to 20 K, only one of the spin-split
CR peaks is observed, which can be explained in terms of the
population of carriers. They populate only in the lowest levelat a low temperature. Remaining 55-T CR peak confirm that
this resonance is due to non-equilibrium distributed carriers.
The effective mass of electrons (m*) is directly deduced
from the peak position Bc. The left-panel of Fig. 2 shows themagnetic field dependence of m*. It is found that they are
considerably larger than the band-edge effective mass of abulk InAs 0.023m0, where m0 is the mass of a free electron.
The large effective mass is due to the quantum confinement

Cyclotron Resonance in Near Surfaceof InAs Quantum Well
G. A. Khodaparast, B. A. Magill,
and Y. H. Matsuda
Electronic states of semiconductor nanostructure nearsurface has been attracting much attention in terms ofcontrolling quantum effects that can emerge through correlation with a superconductor. Josephson junctions made from
Al-InAs have been used to create tunable superconducting
qubits [1]. The key feature of the superconductor (Al) andsemiconductor (InAs) nanostructure is that the two-dimensional gas (2DEG) is confined near the surface, in close
proximity to the superconductor.
Although the electronic state of a bulk InAs is wellunderstood, it is expected that the quantum confinement
effect modifies the electronic state. Moreover, a narrowgap semiconductor exhibits small effective mass and large
g factor, and the non-parabolicity of the band due to theconfinement affects these fundamental parameters. Investigation of the electronic state of the 2DEG in InAs quantum
well is essential for development of the novel semiconductorsuperconductor device. In the present study, the cyclotron resonance (CR) of an InAs quantum well has been
investigated. Clear spin-split cyclotron resonance has been
observed and the effective mass and the g factor are deduced
as a function of magnetic field.
The CR experiment was performed with the single-turnFig. 1. Cyclotron resonance (CR) in the InAs quantum well. The upper
panel shows the resonance spectrum at 300 K. The two solid arrows
suggest the spin-split CR. The broad CR indicated by the dashed arrowis due to the inter-Landau level transition between n = 1 and n = 2. The
lower panel shows the CR at 20 K. Observation of only single peaknear 40 T indicates effect of the thermal population of carriers. Since
the CR around 55 T is considered to be due to the non-equilibrium ofelectrons, it remains at a low temperature.

ISSP Activity Report 201947

Fig. 2. Left-side panel: The obtained effective mass of electrons. The
rather large field variation indicates the strong non-parabolicity ofthe energy band. The right-side panel: The g-factor deduced fromthe experiment and numerical analysis. It is clear that g-factor is also
affected by the non-parabolicity.

effect and the cyclotron energy. The enhancement of m*with increasing magnetic field is interpreted as a result of
the non-parabolicity of the band due to the cyclotron energy.
The g factor can also be obtained by comparison between
the CR peak position and the calculated inter-Landau level
energies. It has been found that the g factor becomes small
with increasing cyclotron energy. The g factor of a bulk InAs
is known to be -14.
The magnetic field dependences of the m* and g leads us
to the values at zero magnetic fields and they are found tobe 0.027m0 and -12, respectively [3]. Determination of thesequantum parameters will significantly contribute development of the novel Josephson-junction devices.
References[1] T. W. Larsen, K. D. Petersson, F. Kuemmeth, T. S. Jespersen,
P. Krogstrup, J. Nygard, and C. M. Marcus, Phys. Rev. Lett. 115,
127001 (2015).
[2] J. Shabani, S. Das Sarma, and C. J. Palmstrøm, Phys. Rev. B 90,
161303 (2014).
[3] J. Yuana, M. Hatefipoura, B. A. Magillb, W. Mayera, M. C.
Dartiailha, K. Sardashtia, K. S. Wickramasinghea, G. A. Khodaparastb,
Y. H. Matsuda, Y. Kohama, Z. Yang, S. Thapac, C. J. Stantonc, andJ. Shabania, Phys, Rev. B 101, 205310 (2020).

These criteria were found to be realized in the spin-1/2
Heisenberg-Ising chain antiferromagnetic material
BaCo2V2O8. Our recent work has revealed a unique quantum
critical behaviors under a strong transverse magnetic field(B⊥c) of 40 T [1], which is characteristic for the transversefield Ising quantum critical point. In contrast, in an applied
longitudinal field (B//c), the phase diagram of the Heisenberg-Ising antiferromagnetic chain is completely different.
Two phase transitions can be induced, and the different
phases are characterized by different quantum spin excitations. In this work, we performed high-resolution terahertz
spectroscopy and magnetocaloric-effect (MCE) measurements in BaCo2V2O8 as a function of temperature andapplied longitudinal magnetic field [2]. We found characteristic features revealing the field-induced quantum phasetransitions, and observed the characteristic spin dynamics forthe various phases. In particular, many-body string excitations as well as low-energy fractional excitations [3] wereidentified in the field-induced gapless phase, by comparing
to the Bethe-Ansatz calculations [2]. Moreover, approaching
the field-induced quantum phase transition from higher field,
we observed a dominant contribution of the higher-energy
string states than the lower-lying fractional excitations, incontrast to the conventional belief.
Figure 1(a) shows the MCE data, T(B), measured at
different initial temperatures. The T(B) starting from 1.7
K at zero field reaches a minimum at the critical field (Bc)of 3.8 T, following by a slight increase towards higher
fields. Before the temperature jump above the saturation
fields of 22.9 T, the MCE detect a weak minimum at about
19.5 T. The weak minimum corresponds to the half-saturated
magnetization as seen in Figure 1(b) and possibly reflects
commensurate fluctuations. In down-sweeping data, theT(B) curve matches with the up-sweeping curve, except
for a (irreversible) heating effect at the phase boundary.
At higher temperatures, the anomalies at the critical andthe half-saturated fields broaden and smear out, whereas
the minimum at saturation fields remains and becomes thedominant feature. These observations qualitatively agree withthe calculated phase diagram for the 1D Heisenberg-Ising

Authors
J. Yuana, M. Hatefipoura, B. A. Magillb, W. Mayera, M. C. Dartiailha,
K. Sardashtia, K. S. Wickramasinghea, G. A. Khodaparastb, Y. H.
Matsuda, Y. Kohama, Z. Yang, S. Thapac, C. J. Stantonc, and J.
Shabania
aNew York UniversitybVirginia TechcUniversity of Florida

Many-Body String Excitations in the
Antiferromagnetic Ising Spin Chain
Compound BaCo2V2O8
Z. Wang, Y. Kohama, and K. Kindo
The one-dimensional (1D) spin-1/2 Heisenberg-Isingmodel is the paradigmatic model for the study of quantum
phase transitions and spin dynamics. However, the realization of this spin model in a solid-state material and its study
are quite challenging. Several criteria must be fulfilled simultaneously: 1. the intrachain coupling should be dominant
over the interchain coupling. 2. A significant Ising-likeanisotropy should be present. 3. The required experimental
conditions, such as high magnetic fields, should be available.

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ISSP Activity Report 2019

Fig. 1. (a) Magnetocaloric effect T(B), (b) magnetization of BaCo2V2O8
measured in the longitudinal configuration (B//c). The solid red line in(b) is calculated from the Bethe ansatz solution of the Heisenberg-Isingmodel with a paramagnetic background.

model, confirming that the BaCo2V2O8 is a suitable system
for investigating the string and the additional fractional
magnetic excitations. This conclusion is also checked by themagnetization data, which shows quantitatively agreementwith the 1D Heisenberg-Ising model (Red curve in Fig.1(b)).
We investigated the dynamical properties with THz transmission spectra in the applied longitudinal magnetic field.
These data are available in Ref. [2] which tracked the fielddependence of exotic spin excitations, i.e., many-body string
and fractional excitations. We have revealed their selection
rule in the vicinity of a field induced QCP in the Ising-likespin-½ chain compound. While the gapped fractional excitations are dominant in the 3D ordered state, we found thatthe high-energy string excitations plays an important role inquantum critical dynamics, which is consistent with BetheAnsatz calculations [2].
References[1] Zhe Wang et al., Phys. Rev. Lett. 120, 207205 (2018).
[2] Zhe Wang et al., Phys. Rev. Lett. 123, 067202 (2019).
[3] Zhe Wang et al., Nature 554, 219 (2018).
AuthorsZhe Wanga,b,c, A. Loidla, Y. Kohama and K. Kindo
aUniversity of Augsburg
bHelmholtz-Zentrum Dresden-Rossendorf
cUniversity of Cologne

Operando Soft X-ray Emission Spectrosopy
of Fe2O3 Anode for Li-Ion Battery
D. Asakura, E. Hosono, J. Miyawaki,
and Y. Harada
Improving the energy and power density of electrodematerials for Li-ion batteries (LIBs) is highly importantto further develop electric vehicles. For the improvementsof battery performance, understanding the charge(Li-extraction) and discharge (Li-insertion) mechanisms
from the viewpoint of the electronic structure isindispensable. Here, we demonstrate operando Fe L3-edge
resonant XES for Fe2O3 which is an anode material of LIB[1]. It is known that the discharge/charge mechanism isbased on conversion reaction denoted as Fe2O3 + 6Li+ + 6e⇔ 3Li2O + 2Fe [2,3]. To confirm the conversion reaction
and further investigate the electronic-structure charge, we
analyzed the operando XES spectra using full-multiplet
calculation [4,5].
The operando cell consists of Fe2O3 poly-crystalline
thin film (~100 nm), a Li-metal counter electrode, andan electrolyte solution [1,6]. The operando XES experiments were carried out with the HORNET XES spectrometer at BL07LSU of SPring-8 [7]. The electrochemical
discharge/charge was performed by cyclic voltammetry.
The operando XES measurements were at an open-circuit
voltage (OCV), discharged state and charged state on thesecond discharge-charge cycle.
Figure 1 shows the XES results [1]. The XES spectrum
for the initial state is attributed to Fe3+ state because the XESline shape is almost the same as that for Fe2O3 in previous
reports [8]. On the other hand, the valence of Fe at the
OCV before the second cycle was not Fe3+, but Fe2+ witha weak p-d hybridization, suggesting considerable irreversibility on the first discharge-charge cycle and a weakened
Fe-O bond after the first cycle. Moreover, we revealed that

Fig. 1. Operando Fe L3-edge resonant XES spectra for the Fe2O3 on thesecond cycle taken with the excitation energy Ein = 708.2 eV [1]. The
Fe L3-edge XES spectrum for the initial state is also displayed. All the
spectra are plotted as a function of energy loss (Eloss).

the Fe 3d electronic-structure change during the second
cycle was to some extent reversible as Fe2+ (2.7 V vs.
Li/Li+: OCV) → Fe0 (0.1 V vs. Li/Li+: discharged) → Fe(2+d)+(3.0 V vs. Li/Li+: charged). This operando Fe L3-edge
resonant XES in combination with the full-multiplet calculation provides detailed information for redox chemistryduring a discharge-charge operation that cannot be obtainedby other methods such as crystal-structure and morphology
analyses. XES is thus very powerful to investigate the origin
and limitation of the lithiation function of anodes involving
conversion reaction.
References[1] D. Asakura et al., Phys. Chem. Chem. Phys. 21, 26351 (2019).
[2] S. Morzilli et al., Electrochem. Acta 30, 1271 (1985).
[3] J. Chen et al., Adv. Mater. 17, 582 (2005).
[4] D. Asakura et al., J. Phys. Chem. Lett 5, 4008 (2014).
[5] D. Asakura et al., Phys. Chem. Chem. Phys. 21, 18363 (2019).
[6] D. Asakura et al., Electrochem. Commun. 50, 93 (2015).
[7] Y. Harada et al., Rev. Sci. Instrum. 83, 013116 (2012).
[8] J. Miyawaki et al., Phys. Rev. B 96, 214420 (2017).
Authors
D. Asakuraa, Y. Nanbaa, M. Okuboa, H. Niwa, H. Kiuchib, J. Miyawaki,
M. Oshimab, E. Hosonoa, and Y. HaradaaNational Institute of Advanced Industrial Science and Technology(AIST)
bThe University of Tokyo

Mass Transport in the PdCu Phase Structuresduring Hydrogen Adsorption andAbsorption Studied by Ambient-Pressure
XPS under Hydrogen Atmosphere
J. Tang, I. Matsuda, and J. Yoshinobu
Pd-based alloys have been the attractive materials forthe hydrogen permeation process, because they possess
higher hydrogen permeability and suppress the hydrogen
embrittlement compared to pure Pd bulk. It was reported
that the PdCu alloy, especially so-called “PdCu40 alloy”,
has a relatively higher hydrogen diffusivity than the other
Pd-alloys (PdAg, PdAu, PdRh, etc.). Industrial usages of

ISSP Activity Report 201949

the PdCu40 alloys with the high Cu content also improvethe economic perspectives because of the lower Cu cost.
Although there are advantages of PdCu alloys in the application fields, it requires further improvements in microscopic
aspects. For example, hydrogen solubility of the facecentered cubic (fcc) structure of a PdCu alloy is approximately one order of magnitude higher than that of bodycentered cubic (bcc) structure.
In the present research, we traced Pd and Cu atoms
during hydrogen adsorption and absorption processes atthe elemental steps, dissociative adsorption of H atoms on
the surface and dissolution of H atoms into the bulk, by theindividual core-level photoelectron spectroscopies under thehydrogen atmosphere [1]. The absorption process is investigated by the Ambient Pressure (AP)-XPS measurements
at the soft X-ray undulator beamline BL07LSU at SPring-8.
The PdCu40 sample, provided from Tanaka Kikinzoku Kogyo
K.K., was annealed at 673 K to form the B2 phase structure.
Then, the B2/fcc phase structure was prepared by subsequent annealing at 1000 K. Figures 1(a) and (b) show theFig. 1. XRD patterns of (a) B2 and (b) fcc/B2 mixed-phase PdCu
alloys.

XRD patterns of the B2- and fcc/bcc- phased PdCu alloys,
respectively. Figures 2 and 3 show the temperature dependence of hydrogen absorption reactions on the B2 and fcc/
bcc phases, observed by measuring the Pd 3d5/2 and Cu
2p3/2 XPS spectra during the hydrogen exposure at 1.5 Torr
at 300-573 K. The temperature-dependent data show thata number of the Pd-H bond increased accompanied withthe decrease of the Cu-H bond with temperature. The Pd
hydride formation in the B2 and fcc/bcc structures show thesame behavior at 300-373 K, however, more Pd hydride wasformed in the B2 structure than in the fcc/bcc structure at473-573 K. The decrease rate of Cu-H component is higher
in the B2 phase than fcc/bcc phase. These results indicatethat the interstitial hydrogen occupied the different sites in
the PdCu alloy bulk at different temperature and confirms thedifference in absorption between the two phases. Comparing
with the previous calculation [2], the significant enhancement of the hydride formation at 473 K can consistently bedescribed in terms of variation of the hydrogen diffusion
paths from the Cu-rich octahedral site to the energeticallyfavorable Pd-rich octahedral site. Furthermore, the activationenergy of the hydrogen diffusion is found to be lower in theB2 phase than that in the fcc/B2 phase. Our elucidation ofhydrogen diffusion mechanisms on the different phase structures gives a new understanding of the hydrogen absorption
process, which could be the critical point for the rate-limiting
process in the hydrogen permeation through the PdCu alloy.
Similar investigation on hydrogen permeation process
was carried out for the PdAg alloy[3]. The measurements of
AP-XPS revealed that Pd atoms were also found to reactive
sites during hydrogen absorption. On the other hand, theprocess is likely promoted by the Pb segregation. It is ofinterest to make systematic investigations of individual
Pd-alloys to capture the whole picture.
References[1] J. Tang, S. Yamamoto, T. Koitaya, A. Yoshigoe, T. Tokunaga, K.
Mukai, I. Matsuda, and J. Yoshinobu, Appl. Surf. Sci. 480, 419 (2019).
[2] L. C. Liu, J. W. Wang, Y. H. He, and H. R. Gong, J. Membr. Sci.
542 , 24 (2017).
[3] J. Tang, S. Yamamoto, T. Koitaya, Y. Yoshikura, K. Mukai, S. Yoshimoto, I. Matsuda, and J. Yoshinobu, Appl. Surf. Sci. 463, 1161 (2019) .
Authors
J. Tanga, I. Matsuda, and J. Yoshinobu
aUniversity of Hyogo

Sub-Cycle Spectroscopy of Proton
Transfer in Ferroelectric Cocrystals
Driven by Intense THz and MIR Fields
T. Umanodan, Y. Okimoto, and J. ItataniFig. 2. Pd 3d5/2 spectra measured on (a) clean surface, and under H2
exposure at 1.5 Torr at (b) 300 K, (c) 373 K, (d) 473 K, (e) 573 K withphoton energy of 680 eV on PdCu(B2) alloy. Pd 3d5/2 spectra measuredon (f) clean surface, and under H2 exposure at 1.5 Torr at (g) 300 K, (h)373 K, (i) 473 K, (j) 573 K with photon energy of 680 eV on PdCu(fcc/
B2) alloy. Surface Pd component, bulk Pd component, CO adsorption
component and Pd-H component are presented with green, blue, purple,
and yellow solid lines, respectively.

50

ISSP Activity Report 2019

Ferroelectricity in organic materials is one of the mostimportant topics in condensed matter physics. It has a wide
range of practical applications because organic systems
possess advantages such as mechanical flexibility, printability, disposability, and cost-effectiveness. Very recently,
proton-mediated co-crystals have been developed as novel
organic ferroelectric materials [1]. In these co-crystals,
proton ordering along the hydrogen bonds between the
proton-donor and -acceptor molecules leads to the emergenceof ferroelectricity, leading to the lack of inversion symmetry.
We focused on a proton-mediated co-crystal [H-dppz][Hca](dppz = 2,3-di(2-pyridinyl)pyrazine, Hca = chloranilate) that

Fig. 1. (a) Crystal structure of Hdppz-Hca cocrystal. (b, c) Schematic
illustrations of the (b) ferroelectric and (c) paraelectric phases.

shows ferroelectricity at room temperature (Tc = 402 K).
Figure 1 shows the crystal structure (a), the ferroelectric andparaelectric origins due to the position of protons (b, c), andthe imaginary part of dielectric constant at room temperature(d).
In this study [2], we investigated the ultrafast dielectric
response of [H-dppz][Hca] by sub-cycle spectroscopy where
carrier-envelope phase-stable intense optical pulses at 1 or
40 THz drove the ferroelectricity, then sub-cycle visible
pulses probes the field-driven dynamics.
First, we irradiated the co-crystal with a single-cycle
THz pulse at a center frequency around 1 THz with amaximum electric field of ~1 MV/cm, and measured thesecond harmonic (SH) of 100-fs laser pulses at 800 nm as afunction of the relative delay between the THz and 800-nm
pulses. The modulation of SH intensity exactly followed the
waveform of the applied THz electric field, and the magnitude of the relative SH change reached up to 10%. This result
indicates that the ultrafast change of the ferroelectricity was
directly driven by the THz electric field.
Second, we irradiated the crystal with an intense
mid-infrared (MIR) pulse (center frequency ~40 THz,maximum electric field ~30 MV/cm), and found that theinduced SH change occurred very differently. The time
profile of observed change of SH intensity was not scaled by
the field profile of the 40 THz pulse as shown in Fig. 2(b).
The SH change contained a component proportional to thesquare of the applied electric field in addition to the linear
component that is proportional to the field as observed in
the 1-THz case. These results suggest that the change of thepolarity of the co-crystal cannot follow the oscillation of theelectric field at 40 THz.
To understand these field effects, we analyzed thefollowing nonlinear equation of motion that contains the
C-O- stretching mode,

Fig. 2. (a-d) Calculated amplitudes of C-O- stretching mode for various
anharmonic parameter a. The black circles in (c) denote the observed
time profile of the SH intensity. (e, f) Schematic illustrations of the
proton motion in the binding potential of the cocrystal when a THz
or MIR pulse is applied. X0, X' denote the equilibrium position and ametastable position with excitation pulses, respectively.

equation, and found that the observed signal ΔISH /ISH were
well reproduced when a ≈ −18 Å-1fs-2, γ ≈ 0.75 eV, and k ≈26 Å−1 as shown by the solid line in Fig. 2. This result
reveals the importance of phonon excitation in our observation of unconventional positive shift of ΔISH /ISH.
Figures 2(e, f) summarize the origins of the observed SHchanges for THz and MIR excitation. In the presence of astrong MIR field that resonantly excites the C-O- stretchingmode, dynamical repositioning of protons occurs, whichleads to the asymmetric polarization. These results can beviewed as an example of ultrafast control of organic ferroelectric cocrystals using intense ultrafast laser pulses at room
temperature.
References[1] S. Horiuchi, F. Ishii, R. Kumai, Y. Okimoto, H. Tachibana, N.
Nagaosa, and Y. Tokura, Nat. Mater. 4, 163 (2005).
[2] T. Umanodan, K. Kaneshima, K. Takeuchi, N. Ishii, J. Itatani, H.
Hirori, Y. Sanari, K. Tanaka, Y. Kanemitsu, T. Ishikawa, S. Koshihara,S.
Horiuchi, and Y. Okimoto, J. Phys. Soc. Jpn. 88, 013705 (2019).
Authors
T. Umanodana, K. Kaneshima, K. Takeuchi, N. Ishii, J. Itatani, H.
Hirorib, Y. Sanarib, K. Tanakab, Y. Kanemitsub, T. Ishikawaa, S. Koshiharaa, S. Horiuchic, and Y. Okimotoa
aTokyo Institute of Technology
bKyoto University
cNational Institute of Advanced Industrial Science and Technology(AIST)d X(t) + μΩ2
d 2X(t) + μγ ⎯⎯−μ ⎯⎯⎯X(t) + aμX2(t) = aEMIR(t),dtdt2
where χ(t) is the change in amplitude of the normal mode,
which can be viewed as an index of the displacement of
the atoms including the protons caused by the intense MIR
electric field EMIR(t). We used the experimental data forEMIR(t) that was obtained by EO sampling with 6-fs visible
pulses. The values μ, Ω, q, are the reduced mass, frequency,
and effective charges of the C-O- mode derived from a
DFT calculation and reflectivity data. We fit the observed
time profile of ΔISH /ISH by numerically solving the above

ISSP Activity Report 201951

Progress of Facilities
Supercomputer Center
The Supercomputer Center (SCC) is a part of theMaterials Design and Characterization Laboratory (MDCL)of ISSP. Its mission is to serve the whole community ofcomputational condensed-matter physics of Japan, providing
it with high performance computing environment. In particular, the SCC selectively promotes and supports large-scalecomputations. For this purpose, the SCC invites proposals forsupercomputer-aided research projects and hosts the Steering
Committee, as mentioned below, that evaluates the proposals.
The ISSP supercomputer system consists of two subsystems: System B is intended for larger total computational
power and has more nodes with relatively loose connections
whereas System C is intended for higher communication
speed among nodes. System B is SGI ICE XA / UV hybrid
system that consists of FAT nodes with large memory,
CPU nodes based on Intel Xeon, and ACC node enhanced
by GPGPU accelerator. Its theoretical performance is 2.6
PFLOPS. System C is HPE SGI 8600 with 0.77 PFLOPS.
Replacement of the System B is scheduled in Autumn 2020.
The new machine will be much more powerful (more than by
the factor of 2) than the current System B in its peak performance.
In addition to the hardware administration, the SCC
puts increasing effort on the software support. Since 2015,
the SCC has been conducting “Project for advancementof software usability in materials science (PASUMS)”. In
this project, for enhancing the usability of the ISSP supercomputer system, we perform some software-advancement
activity such as developing new application software thatruns efficiently on the ISSP supercomputer system, adding
new functions to existing codes, helping in releasing private
codes for public use, and writing/improving manuals for
public codes. Two target programs were selected in fiscal
year 2019 and developed software were released as abICSClass

Max Points

Application

System B

System C

A

100

100

any time

B

1k

500

C

10k

D
E

(proposal made by S. Kasamatsu (Yamagata U.)) and TeNeS(proposal made by N. Kawashima (ISSP)).
All staff members of university faculties or publicresearch institutes in Japan are invited to propose research
projects (called User Program). The proposals are evaluatedby the Steering Committee of SCC. Pre-reviewing is doneby the Supercomputer Project Advisory Committee. In fiscal
year 2019, totally 276 projects were approved. The total
points applied and approved are listed on Table. 1 below.
Additionally, we supported post-K and other computationalmaterials-science projects through Supercomputing Consortium for Computational Materials Science (SCCMS).
The research projects are roughly classified into thefollowing three (the number of projects approved):
First-Principles Calculation of Materials Properties (145)
Strongly Correlated Quantum Systems (36)
Cooperative Phenomena in Complex, Macroscopic
Systems (128)
In all the three categories, most proposals involve bothmethodology and applications. The results of the projects arereported in 'Activity Report 2019' of the SCC. Every year 3-4
projects are selected for “invited papers” and published at
the beginning of the Activity Report. In the Activity Report
2019, the following three invited papers are included:
1. "Development of Open-Source Parallelized Tensor
Network Softwares: mptensor and TeNeS", Satoshi
MORITA (ISSP) and Naoki KAWASHIMA (ISSP)
2. "Disorder-Free Glass Transitions of Spins and Orbitals
in a Frustrated Pyrochlore Magnet", Kota Mitsumoto(Osaka U.), Chisa Hotta (U. Tokyo), and Hajime Yoshino(Osaka U.)
3. "First-principles calculation of thermophysical properties of solids with strong phonon anharmonicity",
Terumasa TADANO (NIMS)
Numberof
Projects

Total Points
AppliedApproved

System B

System C

System B

System C

17

1.7k

0.9k

1.7k

0.9k

twice a year

88

82.8k

4.7k

58.3k

4.1k

2.5k

twice a year

183

1446.2k

91.2k

612.0k

63.7k

10k

2.5k

any time

5

26.9k

2.0k

26.9k

2.0k

30k

2.5k

twice a year16

445.0k

41.0k

249k

34.7k

0

0

0

0

0

SCCMS

S

twice a year32

218.9k

103.5k

218.9k

103.5kTotal

276

2058.3k

312.3k

1180.7k

267.8kTable 1. Research projects approved in 2019
The maximum points allotted to the project of each class are the sum of the points for the two systems; Computation of one node for 24 hours corresponds to one point for the CPU nodes of System B and System C. The
FAT and ACC nodes require four and two points for a 1-node 24-hours use, respectively.

52

ISSP Activity Report 2019

Neutron Science Laboratory
The Neutron Science Laboratory (NSL) has been playing
a central role in neutron scattering activities in Japan since
1961 by performing its own research programs as well as
providing a strong General User Program for the universityowned various neutron scattering spectrometers installedat the JRR-3 (20 MW) operated by Japan Atomic Energy
Agency (JAEA) in Tokai, Ibaraki (Fig. 1). In 2003, theNeutron Scattering Laboratory was reorganized as the
Neutron Science Labora­tory to further promote the neutronscience with use of the instruments in JRR-3. Under the
General User Program supported by NSL, 12 universitygroup-owned spectrom­eters in the JRR-3 reactor are available for a wide scope of researches on material science. The
submitted proposals were about 300 and the visiting users
reached over 6000 person-day in FY2010. In 2009, NSL and
Neutron Science Division (KENS), High Energy Accelerator
Research Organization (KEK) built a chopper spectrometer,
High Resolution Chopper Spectrometer, HRC, at the beamline BL12 of MLF/J-PARC (Materials and Life Science
Experimental Facility, J-PARC) (Fig. 2). HRC covers wide
energy transfer (100 μeV < ħω < 0.5 eV and 0.03 Å-1 < Q <30 Å-1) ranges, and therefore becomes comple­mentary to theexisting inelastic spectrometers at JRR-3. HRC has accepted
general users through the J-PARC proposal system since
FY2011.
Triple axis spectrometers, HRC, a four-circle diffractometer, and a high resolu­tion powder diffractometer are
utilized for a conventional solid state physics and a varietyof research fields on hard-condensed matter, while in thefield of soft-condensed matter science, researches aremostly carried out by using a small angle neutron scattering(SANS-U) and/or neutron spin echo (iNSE) instruments.
The upgraded time-of-flight (TOF) inelastic scattering
spectrometer, AGNES, is available both for hard- and softmatter science. Our General User Program has produced
2064 publications and 284 dissertations until Jan. 29, 2020.
Their lists for the last 10 years is given in Activity Report on
Neutron Scattering Research which is available in ISSP and
NSL web pages.
Since the Great East Japan Earthquake on March 11,
2011, JRR-3 has been closed mainly from safety issues.
Hence, our domestic activity is only on HRC. To take recent
research examples, well-defined spin wave was successfully measured in the pressure-induced magneticphase in
CsFeCl3, and novel excitations near quantum criticality was
identified [1]. Another progress on HRC was that usageof superconducting magnet up to 5 T became available.

Fig. 2. Schematic view of HRC.

Field dependence of spin-wave spectra in 2D antiferromagnet Ba2MnGe2O7 was measured. Since 2012, NSL havemanaged User-Program Supports for Overseas Experiments.
Until March 30, 2020, 398 people (for 297 proposals) have
performed their experiments in various foreign facilities andpublished 106 papers. The lists for User-Program Supports
for Overseas Experiments are also available in Activity
Report on Neutron Scattering Research mentioned above.
As for international cooperative programs, NSL operates
the U.S.-Japan Coopera­tive Program on neutron scattering,
providing further research opportunities to material scientists
who utilize the neutron scattering technique for their researchinterests. In 2010, relocation of the U.S.-Japan triple-axis
spectrom­eter, CTAX, was completed, and it is now open tousers. NSL has another agreement with Australian Centre
for Neutron Scattering (ANSTO), which is the main foreign
facility for the User-Program Supports for Overseas Experiments.
JRR-3 will restart in February 2021 after long shutdown.
During the shutdown period, we have been concentrating
our efforts on upgrading the instruments and neutron beam
circumstances. Specific actions taken include: the installationof focusing collimation systems, such as focusing monochromator and focusing analyzer, and material lens; and the introduction of polarization optics together with the installation of
non-magnetization neutron shield. The neutron guides in the
Guide Hall have also been upgraded by replacing the existingones with super-mirror guides. These upgrades should resultin increase in neutron beam flux several times. The sample
environments such as cryostat and pressure cells have also
been upgraded. Of course, the normal General User Program
will also restart from FY2021. We are eagerly waiting forthat.
[1] S. Hayashida et al., Phys. Rev. B 97, 140405(R) (2018).

International MegaGauss
Science Laboratory

Fig. 1. Reactor hall of JRR-3. Three triple axis spectrometers are shownin the photo.

The objective of this laboratory (Fig. 1) is to study thephysical properties of solid-state materials (such as semiconductors, magnetic materials, metals, insulators, superconducting materials) under ultra-high magnetic field conditions.
Such a high magnetic field is also used for controlling the
new material phase and functions. Our pulse magnets, atmoment, can generate up to 87 Tesla (T) by non-destructive
manner, and from 100 T up to 1200 T (the world strongest
as an in-door record) by destructive methods. The laboratory

ISSP Activity Report 201953

is opened for scientists both from Japan and from overseas,
especially from Asian countries, and many fruitful results are
expected to come out not only from collaborative research
but also from our in-house activities. One of our ultimate
goals is to provide the scientific users as our joint researchwith magnets capable of a 100 T, millisecond long pulses ina non-destructive mode, and to offer versatile physical precision measurements. The available measuring techniques now
involve magneto-optical measurements, cyclotron resonance,
spin resonance, magnetization, and transport measurements.
Recently, specific heat and calorimetric measurements arealso possible to carry out with sufficiently high accuracy.
Our interests cover the study on quantum phase transitions (QPT) induced by high magnetic fields. Field-induced
QPT has been explored in various materials such as quantum
spin systems, strongly correlated electron systems and otherFig. 2. The building for the flywheel generator (left hand side) and along pulse magnet station (right hand side). The flywheel giant DC
generator is 350 ton in weight and 5 m high (bottom). The generator,
capable of a 51 MW output power with the 210 MJ energy storage, isplanned to energize the long pulse magnet generating 100 T without
destruction.

Fig. 1. Signboard at the entrance of the IMGSL.

Building C
Room
101-113

Alias

Type

Bmax

Pulse width
BorePower source

Applications

OthersElectro- Magnetic
Flux Compression

destructive

1200 Tμs
10 mm

5 MJ, 50 kV
2 MJ, 50 kV

Magneto-Optical
Magnetization

5K–
Room temperature

Horizontal
Single-Turn Coildestructive

300 T
200 T

μs
5 mm
10 mm

0.2 MJ, 50 kV

Magneto-Optical measurements
Magnetization

5 K – 400 K

VerticalSingle-Turn Coildestructive

300 T
200 T

μs
5 mm
10 mm

0.2 MJ, 40 kV

Magneto-Optical
Magnetization

2K–
Room temperature

0.9 MJ, 10 kV

Magneto-Optical measurements
Magnetization
Magneto-Transport
Hall resistance
Polarization
Magneto-Striction
Magneto-Imaging
TorqueMagneto- Calorimetry
Heat Capacity

60 T
Building C
Room
114-120

Building C
Room 121

magnetic materials. Non-destructive strong pulse magnets
are expected to provide us with reliable and precise solidstate physics measurements. The number of collaborative
groups for the research is almost 50 in the FT of 2019.
A 210 MJ flywheel generator (Fig. 2), which is the world
largest DC power supply (recorded in the Guinness Book ofWorld Records) has been installed in the DC flywheel gener-

40 ms
18 mm

Mid-Pulse Magnet Non-destructive
70 T

40 ms
10 mm

PPMS

Steady State

14 T

ResistanceHeat Capacity

MPMS

Steady State

7T

Magnetization

87 T(2-stage pulse)

5 ms
10 mm

Short-Pulse Magnet Non-destructive
85 T

Building K
Long-Pulse Magnet Non-destructive

43.5 T

ISSP Activity Report 2019

Down to 0.3 K

Magnetization
Magneto-Transport

2K–
Room temperature

210 MJ, 2.7 kVResistance
Magneto-Calorimetry

2K–
Room temperature

Table 1. Available Pulse Magnets, Specifications

54

Lowest temperature
0.1 K

0.5 MJ, 20 kV
5 ms
18 mm
1s
30 mm

Independent
Experiment in 5 siteaccess to the megagauss science and technology, we havethe single-turn coil (STC) system capable of generating
the fields of up to 300 T by a fast-capacitor of 200 kJ. We
have two STC systems, one is a horizontal type (H-type,Fig. 4) and the other is a vertical type (V-type). Various kindsof laser spectroscopy experiments such as the cyclotron
resonance and the Faraday rotation are possible using theH-type STC.

Fig. 3. (Build. C) A view of the electro-magnetic flux compression
1000 T-class megagauss generator set in side of an anti-explosive house.
1000 T project started since 2010, and finally condenser banks of 9 MJ
(5 MJ + 2 MJ +2 MJ) as a main system with the 2 MJ sub bank system
for the seed field have been installed, and settled in the year of 2014.

ator station at our laboratory, and used as an energy sourceof super-long pulse magnets. The magnet technologies areintensively devoted to the quasi-steady long pulse magnet (anorder of 1-10 sec) energized by the giant DC power supply.
The giant DC power source will also be used for the giant
outer-magnet coil to realize a 100 T nondestructive magnet
by inserting a conventional pulse magnet coil in its center
bore.
Magnetic fields exceeding 100 T can only be obtainedwith destruction of a magnet coil, where ultra-high magnetic
fields are obtained in a microsecond time scale. The project,financed by the ministry of education, culture, sports,science and technology aiming to generate 1000 T withthe electromagnetic flux compression (EMFC) system(Fig. 3), has been proceeded. Our experimental techniques
using the destructive magnetic fields have intensively beendeveloped. The system which is unique to ISSP in theworld scale is comprised of a power source of 5 MJ maincondenser bank and 2 MJ condenser bank. Two magnet
stations are constructed and both are energized from eachpower source. Both systems are fed with another 2 MJ
condenser bank used for a seed-field coil, of which magnetic
flux is to be compressed. The 2 MJ EMFC system iscurrently under the process for optimizing several mechanical and electrical parameters such as dimensions of coils
and liners. And so far, generation of 450 T was successfully done using 1.6 MJ energy. The 5 MJ EMFC system
is under conditioning the main gap switches by finely
tuning control parameters. And so far, generation of 1200 T
was successfully done using 3.2 MJ energy. As an easy

Fig. 4. Schematic picture of the H-type single-turn coil equipped with
50 kV, 200 kJ fast operating pulse power system, capable of generating
300 T within 3 mm bore coil.

Center of Computational
Materials Science
The goal of the computational materials science is tounderstand and predict properties of complicated physicalsystems with a vast number of degrees of freedom and todesign new useful materials before actual experiments. Sincesuch problems cannot be solved with bare hands, it is quite
natural to use computers in computational materials science.
In fact, computer-aided science has been providing answers
to many problems ranging from the most fundamental ones
to the ones with direct industrial applications. In the recent
trends of the hardware developments, however, the growth ofcomputer power is mainly due to the growth in the number ofthe units. This fact poses a very challenging problem in frontof us --- how can we parallelize computing tasks? In orderto solve this problem in an organized way, we coordinate theuse of the computational resources available to our community, and support community members through various
activities such as administrating the website "MateriApps"
for information on application software in computational
science. These activities are supported by funds for various
governmental projects in which CCMS is involved. In
particular, we acted as the headquarters of Priority Area 7 of
MEXT FLAGSHIP2020 Project (so-called "post-K computer
project") in the last project year of 2019. In addition to this,CCMS was involved in Priority Area 5 and Pioneering Area
(CBSM2) of FLAGSHIP2020 project, Element Strategy
Initiative, and Professional Development Consortium for
Computational Materials Scientists (PCoMS).
The following is the selected list of meetings organized
by CCMS in FY2019:• 4/2-4/3 Joint Research Meeting of ISSP Supercomputer
Joint Use and CCMS Annual Activity Report 2019,
ISSP, Kashiwa• 5/17 PCoMS Matching Workshop for industries &
graduate students/postdocs The University of Tokyo,
ISSP, Kashiwa• 7/16-8/8 Computational Approaches to Quantum Manybody Problems 2019 (CAQMP 2019), ISSP, Kashiwa

Fig. 1. Members of CCMS.

ISSP Activity Report 201955

• 8/9 Post-K Project Priority Issue 7, The 5th Annual
Meeting, Ito-Hall, Hongo, Tokyo• 10/8-10/10 The 3rd Innovation Camp for Computational
Materials Science (3rd ICCMS) The Hohoemi-no-Yado,
Yamagata• 12/6 TIA-Kakehashi Poster Workshop 2019, The
University of Tokyo, Kashiwa Campus Station Satellite,
Kashiwa• 2/17-2/18 The 9th Materials Simulation Workshop,
Akihabara• 2/25 PCoMS Skill improvement training for graduate
students & postdocs ISSP, Kashiwa

Laser and Synchrotron Research Center(LASOR Center)
Laser and synchrotron research center (LASOR Center)
was established in October 2012 to push the frontiers of
the photon and materials science. LASOR has 10 groups
in 2019, which is the biggest division in ISSP. Most of theresearch activities on the development of new lasers with anextreme performance and the application to materials science
are studied in specially designed buildings D and E withlarge clean rooms and the isolated floor from the vibrationsin Kashiwa Campus. On the other hand, the experiments
utilizing the synchrotron radiation are performed at beamline
BL07LSU in SPring-8 (Hyogo).
The development of novel laser-based light sourcesin the vacuum-ultraviolet to soft-X-ray regions innovatedmaterials investigations as represented by the highest-energyresolution photoemission, ultrafast time-domain, and ultrafast non-linear spectroscopies. Materials science research
powered by lasers thus has entered a new era. The ultra-shortand high-power lasers are more and more attractive lightsource for both basic science and industry. The state-of-theart laser source and spectroscopy are intensively explored.
Another stream pursued at ISSP is the synchrotron-based
research. The drastic advance in brilliance of the synchrotron
radiation has also opened a new field of its own in photon
science. The soft-X-ray beam-line in SPring-8 (BL07LSU)
was implemented with the longest undulator in the world:
The end stations illuminated by the brilliant soft-X-rays
are used to output innovative achievements based on highresolution spectroscopy data. In 2018, Japanese government
has made a statement to construct a new synchrotron facilityin Tohoku. LASOR has decided to subjectively contribute tothis facility from the design to the operation.

Fig. 1. Optical frequency comb

56

ISSP Activity Report 2019

Fig. 2. Close look of a high-peak-power ultrashort-pulse laser

Lasers and synchrotrons have developed independently;
now both light sources cover a wide photon-energy range
with an overlap in the vacuum-ultraviolet to soft-X-ray
regions. Foreseeing their common interests in research fields
and technologies, ISSP integrated the two streams, namely
the extreme lasers and synchrotron radiations, into thecommon platform. Through the mutual interactions between
the forefronts of lasers and synchrotrons, LASOR will be
the center of innovations in light and materials science, withthe aid of world-wide joint research and close collaborations
with other divisions in ISSP such as New Materials Science,
Nanoscale Science, and Condensed Matter Theory.
The mission of LASOR is to cultivate and propel thefollowing three scientific fields:
1. Laser Science,
2. Synchrotron radiation Science,
3. Extreme Spectroscopy,• Laser science group
We were committed to continuing to developed various
state-of-the-art laser systems such as high-power solid-stateor gas lasers, high-intensity lasers, ultra-short pulse lasers
down to attosecond time scale (Peta Hz linewidth), ultrastable lasers with 1-Hz linewidth, optical frequency combs,
mid-infrared lasers, THz light source, and semiconductor
lasers.
High-power and ultrashort pulse laser technology has
progressed for this 10 years. It opened two directions ofFig. 3. Design of E building for extreme VUV- and SX-lasers and newspectroscopy.

Fig. 6. Pump-probed photoemission system using 60-eV laser
Fig. 4. Phase-dependence of high harmonic spectra in soft X rays.

research. One is a coherent extreme ultraviolet light source
realized by a high-harmonic generation (HHG) scheme. The
average power of HHG became high enough to use it for a
photoemission spectroscopy. The photon energies of 7 eV
to 60 eV are now available. They can be either very narrow
band width or ultrashort pulse. The other is an industrial
science such as a laser processing. Pulse duration variable,
100-W average power, femtosecond laser is now available in
LASOR for any collaborative research including companies.
We also aim to develop novel laser spectroscopy andcoherent non-linear optical physics, enabled via emerging
lasers and optical science/technology, and extensively study
basic light-matter physics, optical materials science, andapplied photonics. Such researches include ultrafast spectroscopy for excited state dynamics, terahertz magnetic-field
spectroscopy for spin dynamics, quantitative micro-spectroscopy on semiconductor lasers and nano-structure photonics
devices, such as quantum wire lasers, gain-switch semiconductor laser, multi-junction solar cells, and bio-luminescentsystems.
• Synchrotron radiation science group
By inheriting and developing the synchrotron techniques
cultivated for more than 20 years, we continuously develop
world cutting-edge spectroscopies such as time-resolved
photoemission /diffraction, ultrahigh resolution soft X-ray
emission, 3D (depth + 2D microscopy) nano ESCA and
X-ray magneto-optical effect and provide these techniques
both for basic material science and for applied science,
which contributes to the device applications in collaboration

Fig. 5. 10-MHz high harmonic generation in an enhancement cavity.

with outside researchers. In order to pioneer new spectroscopies for the next-generation light sources, we upgrade
fast polarization switching of the undulator light source incooperation with SPring-8. In addition, we promote frontier
works on the use of X-ray free electron lasers, SACLA withhigh spatial and temporal coherence comparable to opticallasers in collaboration with scientists of laser light sources
and spectroscopies.
• Extreme spectroscopy group
The advent of laser-based light sources in the softX-ray region is opening a new stage in the field that has
been cultivated by the synchrotron radiations. One of themilestones is to develop a laser-based light source of ~7 eV
for the sub-meV-resolution photoemission spectroscopy. In
this five years, available photon energy became 11 eV withhelp of Yb-fiber laser technology. It has high photon flux
(1014 photons/sec) with sub picosecond time resolution.
Laser-based spin-resolved ARPES is realizing in LASOR.
This technology would open brand-new spectroscopy. Highharmonic generation based photoemission spectroscopy
in the 20-60 eV region is another direction to be pursued.
Time-domain spectroscopy in the femtosecond region wasachieved. Combined with the picosecond time-domain
spectroscopy utilizing the pulsed light delivered fromsynchrotrons, we investigate the electronic structures anddynamics of matter in bulk, on surface, and into the nanoscale. The ultimate objective is to expand the soft-X-ray
operando methodologies by lasers. Diffractions, magnetooptical effects, and inelastic scatterings now done at synchro-Fig. 7. Photonics devices under study: (left panel) semiconductor
quantum wires and (right panel) firefly-bioluminescence system
consisting of light emitter (oxyluciferin) and enzyme (luciferase)

ISSP Activity Report 201957

trons will be performed by lasers, to access the real-time
dynamics of chemical reactions and phase transitions down
to the femtoseconds.
State-of-the-art laser based organism spectroscopy is
new direction in LASOR. ISSP research area is shifting from
simple material and science to complex one including living
body and functional material with excited state physics.

Synchrotron Radiation Laboratory
The Synchrotron Radiation Laboratory (SRL) was established in 1975 as a research division dedicated to solid statephysics using synchrotron radiation (SR). Currently, SRL is
composed of two research sites, the Harima branch and theE-building of the Institute for Solid State Physics.
• Brilliant soft X-ray beamline at Harima branch
In 2006, the SRL staffs have joined the Materials
Research Division of the Synchrotron Radiation Research
Organization (SRRO) of the University of Tokyo and they
have played an essential role in constructing a new highbrilliant soft X-ray beamline, BL07LSU, in SPring-8. The
light source is the polarization-controlled 25-m long soft
X-ray undulator with electromagnetic phase shifters thatallow fast switching of the circularly (left, right) and linearly(vertical, horizontal) polarized photons.
The monochromator is equipped with a varied linespacing plain grating, which covers the photon energy range
from 250 eV to 2 keV. At the downstream of the beamline,
a lot of experimental stations have been developed forfrontier spectroscopy researches: five endstations, i.e. timeresolved soft X-ray spectroscopy (TR-SX) equipped witha two-dimensional angle-resolved time-of-flight (ARTOF)
analyzer (Fig. 1), three-dimensional (3D) nano-ESCA
station equipped with the Scienta R-3000 analyzer (Fig. 2),high resolution soft X-ray emission spectroscopy (XES)
stations (Fig. 3) are regularly maintained by the SRL staffs
and open for public use, and at free-port station many novel
spectroscopic tools have been developed and installed
such as ambient pressure photoemission (Fig. 4) and soft
X-ray diffraction (Fig. 5) which are also open for public
use from 2018, and soft X-ray resonant magneto-optical
Kerr effect (MOKE) and so on. The beamline construction

Fig. 1. TR-SX station

58

Fig. 2. 3D-nano ESCA station

ISSP Activity Report 2019

Fig. 3. Soft X-ray emission station

was completed in 2009 and SRL established the Harimabranch laboratory in SPring-8. At SPring-8 BL07LSU, each
end-station has achieved high performance: the TR-SX
station have established the laser-pump and SR-probe
method with the time-resolution of 50 ps which corresponds
to the SR pulse-width; the 3D nano-ESCA station reaches
the spatial resolution of 70 nm; the XES station provides
spectra with the energy resolution around 70 meV at 400 eVand enabled real ambient pressure experiments. Soft X-ray
resonant MOKE station has been developed to make novel
magneto-optical experiment using fast-switching of thepolarization-controlled 25-m long soft X-ray undulator. The
soft X-ray diffraction station has been fully constructed andthe time-resolved measurement is available by using lasers
at the TR-SX station. In 2019, 240 researchers made theirexperiments during the SPring-8 operation time of 4584
hours.
• High-resolution Laser SARPES at E-building
Spin- and angle-resolved photoelectron spectroscopy(SARPES) is a powerful technique to investigate the spindependent electronic states in solids. In FY 2014, LASOR
and SRL staffs constructed a new SARPES apparatus(Fig. 6), which was designed to provide high-energy and-angular resolutions and high efficiency of spin detection
using a laser light at E-building. The achieved energy resolution of 1.7 meV in SARPES spectra is the highest in theworld at present. From FY 2015, the new SARPES system
has been opened to outside users.

Fig. 4. Ambient pressure photoemis- Fig. 5. Soft X-ray diffraction
sion
stationFig. 6. Laser-SARPES system at E-building

The Laser-SARPES system consists of an analysis
chamber, a carousel chamber connected to a load-lockchamber, and a molecular beam epitaxy chamber, which
are kept ultra-high vacuum (UHV) environment and areconnected each other via UHV gate valves. The electrons are
excited with 6.994-eV photons, yielded by 6th harmonic of a
Nd:YVO4 quasi-continuous wave laser with repetition rate of
120 MHz and 10.7 eV photons, driven by the third harmonic
radiation at 347 nm of an Yb:fiber chirped pulse amplifierlaser, which was developed by Kobayashi's lab in LASOR.
The hemispherical electron analyzer is a custom-made ScientaOmicron DA30-L, modified for installing the spin detectors. The spectrometer is equipped with two high-efficient
spin detectors associating very low energy electron diffraction are orthogonally placed each other, which allows us toanalyze the three-dimensional spin polarization of electrons.
At the exit of the hemispherical analyzer, a multi-channel
plate and a CCD camera are also installed, which enables us
to perform the angle-resolved photoelectron spectroscopy
with two-dimensional (energy-momentum) detection. The
laser-SARPES machine can provide both high-resolution
spin-integrated and spin-resolved photoemission spectra invarious types of solids, such as spin-orbit coupled materials
and ferromagnetic materials.

ISSP Activity Report 201959

Conferences and Workshops
Spectroscopies in Novel Superconductors (SNS2019)
June 16-21, 2019
K. Okazaki and H. Wadati
SNS 2019 follows a successful series of international conferences in Argonne (1991), Sendai (1992), Santa Fe (1993);
Stanford (1995), Cape Cod (1997), Chicago (2001), Sitges (2004), Sendai (2007), Shanghai (2010), Berkeley (2013), andStuttgart (2016). Leading experts in spectroscopy, transport, materials, and theory meet to address current issues in the frontierof superconductivity research. Highlights to be discussed include the pairing mechanisms of cuprates, ruthenates, iridates,
iron compounds, heavy-fermion systems, organic compounds, and low-dimensional materials; interplay between superconductivity and competing orders; topological superconductivity; superconductivity in 2D materials, at surfaces, and interfaces;
non-equilibrium superconductivity and its dynamical control; experiments under extreme conditions; new experimental
methods; and the design and discovery of novel superconductors with higher transition temperatures. This conference was heldat Ito international research center, the University of Tokyo, and organized by the international steering committee, of whichchair is Professor Arun Bansil (Northeastern University, USA), the program committee, of which chair is Professor Takami
Tohyama, and the organizing committee, of which chairs are Professor Atsushi Fujimori and Professor Shik Shin, and advised
from the international advisory committee. There are 208 participants from 21 countries mainly from Japan, China, and USA.
As main topics, the recent progress in charge ordering and physical properties under uniaxial pressure of cuprate high-Tc superconductors, nematic electronic states of cuprates and iron-based superconductors, non-equilibrium superconductivity, superconductivity in magic-angle bilayer graphene, topological superconductivity, and Higgs mode in superconductors were presented.
The programs proceeded in a single track without parallel sessions, and there were 193 presentations including 75 oral presentations (47 invited presentations) and 118 poster presentations. During the conference, discussions were actively conducted
every day. In the closing session, it was announced that the next conference will be held at Bangalore in India, and 6 young
researchers were awarded the young researcher’s prize.

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ISSP Activity Report 2019

Computational Approaches to Quantum Many-body Problems (CAQMP2019)
July 16 - Aug. 8, 2019
K. Harada, K. Ido, R. Kaneko, N. Kawashima, Y. Kuramashi, T. Misawa, S. Morita, Y. Motoyama,
T. Nishino, T. Okubo, T. Sakurai, T. Suzuki, K. Tamai, S. Todo, and K. Yoshimi
This event is one of the series of long-term annual international workshops started in 2006, in which a theoretical staff
member serves as the principal organizer. A relatively small number of researchers stay in one place for a longer period thanordinary meetings, focusing on the subjects of remarkable recent progress. The 2019 workshop (CAQMP2019) was the 13th in
the series. The theme of CAQMP2019 was the tensor network and its application. The 2016 workshop (TNQMP2016) was also
dedicated to this subject. Between two workshops, there have been many advances in the methodology and application. Also,
researchers recently became aware of connection between the tensor network and information science. Reflecting them, in thefirst week of the workshop, we discussed new numerical calculation methods, in the second week, the tensor network method,and in the third week, we focused on the connection with information science. The 4th week was dedicated to the comparison
between calculations and experiments. We used the same format as in TNQMP2016, i.e., on Mondays, we have symposia, eachconsisting of 30-minute talks, and from Tuesday to Friday, there was a lecture in the morning and a seminar in the afternoon.
The list of the participants included: Anders Sandvik (Boston), Tao Xiang (CAS, Beijing), Laurence Vanderstraeten (Ghent),
Yoshinobu Kuramasu (Univ. Of Tsukuba), Guangming Zhang (Tsinghua), Qibin Zhao (RIKEN), Hyun-Yong Lee (ISSP), Lei
Wang (CAS, Beijing) and Cristian Batista (Tennessee). The total number of participants, including lectures and symposia,
was 538 (of which 380 were lectures and 158 were symposia). Many lectures held this time were all recorded and uploaded toYouTube.

ISSP Activity Report 201961

New Perspective in Spin Conversion Science (NPSCS2020)
February 3-4, 2020
Y. Otani, E. Saitoh, M. Shiraishi, S. Murakami, and A. Oiwa
Spin conversion is a generic term for the phenomena associated with the interconversion between different physical entities
such as electricity, light, sound, vibration, and heat that are mediated by spins. Most spin-conversion phenomena take place atthe nanoscale in the regions near the interface of two diverse varieties of materials, such as magnets, non-magnets, semiconductors, and insulators. The fundamental understanding of the spin conversion phenomena will thus allow us to develop novel
functionalities applicable to practical energy-efficient spintronics as well as thermoelectric devices.
Therefore, we set the purpose of this workshop is for the international spintronics research community, especially for theworld-leading foreign and domestic researchers working on the spin conversion phenomena, to exchange the most recent experimental and theoretical achievements on the spin conversion science. This workshop was also held as a concluding meeting of
the Grant in Aid for Scientific Research in Innovative Areas, "Nano-Spin Conversion Science" conducted from 2014 to 2020.

The workshop was a great success. The 21 invited talks covered a variety of research topics such as spin-chargeinterconversion at the topological surface and Rashba interface states, the magnon-phonon coupling, antiferromagnet
spintronics, superconducting spintronics, and also neuromorphic computing using spin conversion phenomena. Youngresearchers and graduate course students gave 53 poster presentations and participated in animated discussions at theworkshop. The total number of participants was 183. Lastly, we much appreciate everyone's generous support, including
the organizers, judges, directors, secretaries, and student part-timers. Without any help from the members, this could nothave been accomplished.

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ISSP Activity Report 2019

Computational Materials Science —New Perspectives—

April 2-3, 2019
T. Ozaki, N. Kawashima, O. Sugino, H. Noguchi, Y. Higuchi, S. Morita, H. Watanabe,
H. Kawamura, J. Haruyama, T. Hoshi, T. Tohyama, and H. Okuyama

This workshop was organized for the computational condensed matter research community, especially for the users of the ISSP supercomputers, to exchange the most recent research progress and related information on the computational condensed matter research and on
the high-performance computation of related research areas. This was held as a series of annual workshop of ISSP supercomputer that has
been held every year. The selected topics include the target of the post-K supercomputer project, the progress made in the elements strategy
projects, the emergent data-driven material
research, and “the Project for advancement ofsoftware usability in materials science” thatin 2019 developed abICS, which is a software
framework for performing configurational
sampling in disordered systems, with a specificemphasis on multi-component solid state systems
such as metal and oxide alloys, and TeNes, which
is a solver for 2D quantum lattice system basedon a PEPS wave function and the CTM method.
In addition to 16 invited talks and 30 poster
presentations, two special lectures were given
by Prof. Miyashita and Prof. Fujii for quantum
states of photons and quantum computing,respectively.

Joint Workshop of Novel Material Development and Measuring Technique by Using
High-Pressure

July 5-6, 2019

F. Iga, Y. Uwatoko, and C. Sekine
Much novel and interesting physical properties such as superconductivity, metal-insulator transition and multipole transition
induced under high-pressure condition have been found in recent years. Furthermore, much novel interesting materials by using
high pressure synthesis have been also developed recently. High-pressure technology in Japan is historically on the top classin the world, but it becomes severe in international competition in recent years. Researchers of condensed matter physics andgeophysics fields have carried development of high-pressure synthetic technology together, while sometimes influencing somedegree independence each other, up to date. This joint workshop at ISSP has been organized for the high-pressure community
to discuss the recent interesting physics and exchange the most recent information on each measurement technique.
In the workshop, 19 of oral and 25 poster presentations in total have been held for 2 days, and the participants had fruitful
discussion, especially including a topic of room
temperature superconductivity. The 1st day participants were 75 people (47 people from outside
ISSP and 28 from the campus) and the number ofthe participants of the 2nd day were 49 (36 fromoutside and 28 from the ISSP). It can be said that
this workshop has succeeded in accomplishing
purposes as expected.

ISSP Activity Report 201963

Physics and Chemistry of Light-induced Functions of Retinylidene Proteins
September 5-6, 2019
K. Inoue
Retinal proteins (rhodopsins) are photoreceptive membrane proteins that exist in an extremely wide range of biological
species, from bacteria to animal, and giant viruses. When the retinal protein absorbs light, the retinal chromophore is isomerized and various physiological functions such as ion transport, enzymatic reaction and intracellular signal transduction
are expressed. To achieve common understanding of the current situation of the study on retinal proteins, we held an ISSP
workshop presenting cutting-edge researches by representative retinal protein researchers in Japan. This workshop was also
positioned as a satellite symposium of the International Conference on Retinal Proteins, which is held in Ise-Shima in 2020.
Totally, 111 people participated, and one keynote speech, 22 invited speeches, and 24 poster presentations from the generalpublic were given. They presented recent studies on non-equilibrium processes in expression of the biological functions using
advanced laser spectroscopy, structural studies by synchrotron x-ray radiation and free electron laser, and NMR, large-scalecomputational study, and so on. Throughout the workshop, many opinions on the current situation in the discipline and new
problems to be solved were actively exchanged.

Helium Crisis: Present and Future

November 6, 2019
S. Ohara, H. Kawamura, H. Mori, S. Katsumoto, K. Kindo, T. Kondo, H. Tsuchiya, R. Sagiyama, and M. Yamashita

Shortage of helium supply directly hits researchers and is threatening sustainability of current academic studies all over theworld. Helium is indispensable not only for condensed-matter scientists, but also for those in various research fields including
elementary-particle physics, astronomy, and chemistry. Moreover, helium is unsubstitutable gas for many industrial uses, suchas medical MRI examinations, productions of semiconductors and optical fibers, etc. Helium supply in Japan totally depends onimports from unstable suppliers in limited production areas, resulting “Helium Crisis” frequently. The present Helium Crisis is
more serious than ever before because the demands from developing countries increase rapidly despite the decrease of supplies
from United States.
In this workshop, we assembled academic scientists from different research area and participants from relevant companies
to discuss the present status and possible future perspectives. We first discussed the current situations happening in research
institutions. A review regarding the situation of gas supplying companies was also given by Y. Koizumi, president of Gas
Review. Discussions about the restrictions
applied to liquid helium and subjects to form
the urgent proposals were also given.
One of the focus topics of this workshop
was a helium-recycle framework by utilizing
helium liquefying facilities of academic
places. Recycling helium from vaporized
helium gas is limited in research institutions
equipped with expensive helium-liquefaction
facility. Therefore, sharing a liquefaction
facility with neighboring sites can considerably save the cost for recycling helium.
Successful cases were reported from thecollaborations between OIST and Universityof the Ryukyus and those between JAXA andOsaka University. It was also pointed out as
an important future issue to build stockpilesof helium gas for preparing shortage. We
hope that this workshop will be taken as anopportunity to enhance helium recycle inJapan.

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ISSP Activity Report 2019

New Development of High Magnetic Field Science by HMF Collaboratory—Associated with Optical Science—

December 3-5, 2019
M. Hagiwara, K. Kindo, M. Tokunaga, Y. H. Matsuda, H. Nojiri, T. Sasaki, S. Tajima, N. Hanasaki, and Y. Narumi

This workshop was organized by high magnetic field (HMF) forum, the members of which are HMF users and providers, toexchange the most recent information on the development of measurement techniques and scientific research in high magnetic
fields, and to aim at the association with optical science. This was held for the first time outside ISSP, namely Osaka University where the Joint-usage program of HMF research is conducted by the Center for Advanced High Magnetic Field Science
with International MegaGauss Science Laboratory at ISSP as a new network-type Joint Usage/Research Center. A variety ofscientific topics including optical science (magnetic alloy, multiferroics, heavy fermions, frustrated magnets, quantum magnets,
topological materials, magnetic semiconductors, measurement techniques, theory and so on.) were presented at this workshop.
In addition to 20 talks and 57 poster presentations, 6 invited talks by optical scientists were given. The number of registeredparticipants was 112. During the workshop, present status and future plan of HMF facilities in Japan and a western Japan HMF
network named KOFUC network were also provided.

Innovations to the Next-Generation Synchrotron Radiation

February 14, 2020
I. Matsuda, T. Arima, F. Komori, Y. Harada, H. Mimura, and T. Kondo

A plan for the next-generation synchrotron radiation facility was launched in Japan and the user-experiments are expectedfrom 2023. Ten beamlines are planned by the Photon Science Innovation Center (PhoSIC) and the National Institutes for
Quantum and Radiological Science and Technology (QST). There have been vigorous discussions on experimental methods
for the individual beamlines that are expected to innovate our science and technology, including novel X-ray optics, advanced
measurements, informatics analyses and automatic controls by AI robots.
To promote our project toward the new synchrotron radiation facility, we organized this workshop at the ISSP lectureroom with broadcast live at SPring-8. It has successfully brought together 91 participants with fruitful discussion on these newtechnologies and foresights of the coming science. The program started with invite talks by Dr. Tetsuya Nakamura (PhoSIC)
and Dr. Masamitsu Takahashi (QST), introducing their beamlines. In the following, there were invited talks by leading young
researchers who made presentations on technical innovations for synchrotron radiation. We had a poster session by graduate
students and postdocs who shared their new results and actively discussed with each other. Participants were confident to findthat our next-generation synchrotron radiation facility would be developed by our next generations.

ISSP Activity Report 2019

65

66

Subjects of Joint Research

ISSP Activity Report 2019

令和元年度 共同利用課題一覧（前期）/ Joint Research List (2019 First Term)
嘱託研究員 / Commission Researcher
No.

課題名

担当所員：森
1

氏名

所属

Name

Organization

初果

水素結合型分子性無水プロトン伝導体におけるダイナミクスの研究担当所員：長谷川

水野

元博

金沢大学

大学院自然科学 Dynamics study of moleclar anhydrous proton conductors with
Motohiro Mizunohydrogen bonds
研究科

理工学域

極低温走査トンネル顕微鏡を用いた鉄カルコゲ
ナイド超伝導体 FeSeTe の研究

吉田 靖雄

金沢大学

3

走査トンネル顕微鏡による局所強磁性共鳴法の開発

安担当所員：川島東秀

Lo ｗ -temperature STM study on iron-chalcogenide
superconductor FeSeTe

Yasuo Yoshida

Kanazawa University

北陸先端科学技 先端科学技術研 Development of local ferromagnetic resonance in scanningtunneling microscopy
術大学院大学
究科

Toshu AnnJapan Advanced
Institute of Scienceand Technology

Hiroshi Watanabe

Keiyo University

直輝

スーパーコンピュータの調達に関する意見交換

担当所員：上床Kanazawa University

幸雄

2

4

Title

渡辺

宙志

慶應義塾大学

理工学部

Procurement of Supercomputer System美也

5

希土類 122 化合物における圧力効果

繁岡

透

山口大学

大学院理工学研
Pressure effect of rare earth 122 compounds
究科

Toru Shigeoka

Yamaguchi University

6

低温用マルチアンビル装置の開発

辺土

正人

琉球大学

理学部

Development of multi-anvil apparatus for low temperature

Masato Hedo

University of the
Ryukyus7

ターンバックル式小型 DAC を利用した多重環境
狩野
下電気抵抗測定みか

日本工業大学

共通教育群

Electrical resistivity measurements under multi-extreme
conditions by using a micro-turnbuckle DAC

Mika Kano

Nippon Institute ofTechnology

No.

課題名

氏名

所属

Title

Name

Organization

Takeshi Kanomata

Tohoku Gakuin
University

Miho Itoi

Nihon University

ISSP Activity Report 20198

3d 遷移化合物に関する圧力効果

鹿又武

東北学院大学

工学総合研究所 Effect of pressure on the 3d transition compounds

9

擬一次元有機物質の圧力下物性研究

糸井

充穂

日本大学

医学部

10

高圧下 X 線回折法の開発

江藤 徹二郎

久留米工業大学 工学部

Development of High Pressure X-ray diffraction measurements Tetsujiro Eto

Kurume Institute ofTechnology

11

多重極限関連圧力装置の調整

高橋

博樹

日本大学

Adjustment of Cubic Anvil apparatus

Hiroki Takahashi

Nihon University

12磁性体の圧力効果

巨海

玄道

久留米工業大学 工学部

Effect of pressure on the Magnetic Materials

Gendo Oomi

Kurume Institute ofTechnology

13

希釈冷凍機温度で使用可能な 10GPa 級超高圧発
松林生装置の開発和幸

電気通信大学

大学院情報理工 Development of 10 GPa class high pressure apparatus for low
temperature
学研究科

KazuyukiMatsubayashi

The University
of ElectroCommunications

14

高圧下量子振動観測システムの開発

摂待

力生

新潟大学

理学部

Rikio Settai

Niigata University15

酸化物試料の作製と高圧下物性測定

川中 浩史

産業技術総合研 電子光技術研究
Sample preparation and high pressure experiments
究所部門

Hirofumi Kawanaka

National Institute ofAdvanced Industrial
Science and Technology

16

カンチレバーを用いたトルク測定法の開発

鳥塚 潔

日本工業大学

共通教育群

Kiyoshi Torizuka

Nippon Institute ofTechnology

17

圧力下 NMR 測定法に関する開発

藤原

京都大学

大学院人間・環 Development of NMR measurement method under highpressure
境学研究科

Naoki Fujiwara

Kyoto University18

有機伝導体の圧力効果

村田 惠三

大阪経済法科大 ２１世紀社会総
Effect of pressure on the organic conductor
学
合研究センター

Keizo Murata

Osaka University

直樹

文理学部

Study on pressure induced superconductivity of quasi organic
conductor

Development of quantum oscillation under high pressure

Development of torque measurement method

担当：中性子科学研究施設

67

19

4G における共同利用推進

佐藤

卓

東北大学

多元物質科学研
Research and Support of General-Use at 4G
究所

Taku Sato

Tohoku University

20

〃

奥山

大輔

東北大学

多元物質科学研究所〃

Daisuke Okuyama

Tohoku University

21

〃

那波

和宏

東北大学

多元物質科学研究所〃

Kazuhiro Nawa

Tohoku University

22

6G における共同利用推進

富安

啓輔

東北大学

大学院理学研究
Research and Support of General-Use at 6G科

Keisuke Tomiyasu

Tohoku University

23

6G、T1-1 における共同利用推進

岩佐

和晃

茨城大学

フロンティア応
用原子科学研究 Research and Support of General-Use at 6G, T1-1
センター

Kazuaki Iwasa

Ibaraki University

68

No.

課題名

氏名

所属

Title

Name

Organization

ISSP Activity Report 201924

T1-1、T1-3 における共同利用推進

大山

研司

茨城大学

大学院理工学研
Research and Support of General-Use at T1-1, T1-3
究科

Kenji Ohyama

Ibaraki University25

T1-1 における共同利用推進

桑原

慶太郎

茨城大学

大学院理工学研
Research and Support of General-Use at T1-1
究科

Keitaro Kuwahara

Ibaraki University

26

〃

横山

淳

茨城大学

理学部

〃

Makoto Yokoyama

Ibaraki University

27

〃

伊賀

文俊

茨城大学

大学院理工学研
究科〃

Fumitoshi

Ibaraki University

Iga

28

T1-2、T1-3 における共同利用推進

藤田

全基

東北大学

金属材料研究所 Research and Support of General-Use at T1-2, T1-3

Masaki Fujita

Tohoku University29

T1-2、T1-3、６G における共同利用推進

南部

雄亮

東北大学

金属材料研究所 Research and Support of General-Use at T1-2, T1-3, 6G

Yusuke Nambu

Tohoku University

池田

陽一

東北大学

金属材料研究所

Yoichi Ikeda

Tohoku University

木村

宏之

東北大学

多元物質科学研
Research and Support of General-Use at T2-2, T1-3
究所

Hiroyuki Kimura

Tohoku University

坂倉

輝俊

東北大学

多元物質科学研究所

Terutoshi Sakakura

Tohoku University

30
31
32

〃
T2-2、T1-3 における共同利用推進
〃

〃

〃

33

T2-2、T1-3 における共同利用推進

山本

孟

東北大学

多元物質科学研
Research and Support of General-Use at T2-2, T1-3
究所

Hajime Yamamoto

Tohoku University34

C1-2 における共同利用推進

杉山

正明

京都大学

複合原子力科学
Research and Support of General-Use at C1-2
研究所

Masaaki Sugiyama

Kyoto University

35

C1-2、C2-3-1 における共同利用推進

井上

倫太郎

京都大学

複合原子力科学
Research and Support of General-Use at C1-2, C2-3-1
研究所

Rintaro Inoue

Kyoto University36

C2-3-1 における共同利用推進

守島

健

京都大学

複合原子力科学
Research and Support of General-Use at C2-3-1
研究所

Ken Morishima

Kyoto University37

C3-1-2、C2-3-1 における共同利用推進

日野

正裕

京都大学

複合原子力科学
Research and Support of General-Use at C3-1-2, C2-3-1
研究所

Masahiro Hino

Kyoto University38

C3-1-2 における共同利用推進

田崎

誠司

京都大学

大学院工学研究
Research and Support of General-Use at C3-1-2科

Seiji Tasaki

Kyoto University

39

〃

小田

達郎

京都大学

複合原子力科学研究所〃

Tatsuro Oda

Kyoto University

40

〃

北口

雅暁

名古屋大学

現象解析研究センター〃

Masaaki Kitaguchi

Nagoya University

No.

課題名

担当所員：原田

氏名

所属

Title

Name

Organization

慈久

ISSP Activity Report 201941

時間分解光電子顕微分光実験の技術開発

木下 豊彦

高輝度光科学研 利用研究推進部 Technical development of time-resolved photoemission
microscopy measurement究センター
門Toyohiko Kinoshita

JASRI

42

有機化合物の光電子分光

金井要

東京理科大学

理工学部

Kaname Kanai

Tokyo University of
Science43

トポロジカル絶縁体の電子状態の解明

木村

昭夫

広島大学

大学院理学研究
Electronic-structure study of topological insulators
科

Akio Kimura

Hiroshima University44

Si(111）上単層タリウムの高次高調波を用いた時
坂本
間分解光電子分光一之

大阪大学

大学院工学研究 Time-resolved ARPES investigation of monolayer Thallium on
Si(111)科

Kazuyuki Sakamoto

Chiba University

45

液中プラズマ印加水の軟 X 線吸収 / 発光分光技
術開発

寺嶋

和夫

東京大学

大学院新領域創 Technical development of soft X-ray absorption/emission
spectroscopy for water processed by in-liquid plasma
成科学研究科Kazuo Terashima

The University of
Tokyo

46

液中プラズマ印加によるナノ粒子分散特性評価と軟 X 線分光

伊藤

剛仁

東京大学

大学院新領域創 Characterization of nano-particle distribution in water
processed by in-liquid plasma and soft X-ray spectroscopy
成科学研究科Tsuyohito Ito

The University of
Tokyo

47

軟 X 線発光・共鳴非弾性散乱分光の磁気円・線二色性測定システムの構築

菅

大阪大学

産業科学研究所

Shigemasa Suga

Osaka University48

軟 X 線吸収／発光分光法によるリチウムイオン
電池電極材料の電子物性研究

細野英司

産業技術総合研 省エネルギー研 Study on the electronic property of electrode materials for Liion batteries by soft X-ray absorption/emission spectroscopy
究所
究部門

Eiji Hosono

National Institute ofAdvanced Industrial
Science and Technology

49

〃

朝倉

大輔

産業技術総合研 エネルギー技術
究所
研究部門

Daisuke Asakura

National Institute ofAdvanced Industrial
Science and Technology

50

高分解能光電子分光による酸化バナジウムの研
究

藤原

秀紀

大阪大学

大学院基礎工学
Study on vanadium oxides by high resolution Photoemission
研究科

Hidenori Fujiwara

Osaka University

51

省エネ・創エネ・蓄電デバイスのオペランド分
光

尾嶋

正治

東京大学

大学院工学系研 Operando nano-spectroscopy for energy efficient, power
generation and energy storage devices
究科

Masaharu Oshima

The University of
Tokyo

52

原子レベルで制御されたモデル有機分子表面上の界面水の電子状態観測

林

東京工業大学

総合理工学研究 Analysis of the electronic structure of interfacial water formed
Tomohiro Hayashi
on model organic surfaces
科

Tokyo Institute ofTechnology

53

三次元 nanoESCA による実デバイスのオペラン
永村
ド電子状態解析担当所員：松田滋正

智広
直佳

Photoemission study on organic compounds

Construction of a noble system for circular and linear
dichroism in soft X-ray emission and RIXS spectroscopy〃

物質・材料研究 先端材料解析研 Operando analysis of the electronic structure of actual devices
Naoka Nagamura
by 3DnanoESCA
機構
究拠点

National Institute forMaterials Science

巌

69

54

スピン分解光電子分光の測定技術開発

木村 真一

大阪大学

大学院生命機能 Technical development of spin-resolved photoemission
spectroscopy measurement研究科

55

時間分解磁気光学実験の技術開発

小嗣

東京理科大学基礎工学部

真人

Technical development of time-resolved magneto-opticalexperiment

Shin-ichi Kimura

Osaka University

Masato Kotsugi

Tokyo University of
Science

70

No.

課題名

氏名

所属

Title

Name

Organization

ISSP Activity Report 2019東京大学

大学院工学系研
Regulation of magnetic wave functions by
究科

Masaki Kobayashi

The University ofTokyo

時間分解吸収分光による EuNi2（Si1-xGex)2 の価
三村 功次郎数転移ダイナミクスの解明

大阪府立大学

大学院工学研究 Dynamics of valence transition in EuNi2（Si1-xGex)2 revealedby time-resolved XAS
科

Kojiro Mimura

Osaka Prefecture
University

58

コヒーレント共鳴軟 X 線散乱による磁気ドメイン構造の観測山崎裕一

統合型材料開Observation of magnetic domain structure for ferromagnetic
物質・材料研究
発・情報基盤部
thin films by means of resonant scatterin
機構
門

Yuichi Yamasaki

National Institute forMaterials Science59

遷移金属化合物の時間分解 X 線分光と回析

和達大樹

兵庫県立大学56

超高速磁化応答による磁性波動関数の制御

57

担当所員：近藤小林

正起

Time-resolved x-ray spectroscopy and diffraction of transitionHiroki Wadati
metal-compounds

University of Hyogo

猛60

トポロジカル超伝導体の探索

坂野 昌人

東京大学

大学院工学系研Search for topological insulators
究科

Masato Sakano

The University of
Tokyo

61

高分解能光電子分光による強相関物質の研究

横谷

岡山大学

異分野基礎科学
ultra-high resolution study on strongly correlated materials
研究所

Takayoshi Yokoya

Okayama University

62

レーザー励起光電子顕微鏡を使った抵抗変化メ
モリ材料の研究木下 健太郎

東京理科大学

理学部

Study on Materials for Resistive Switching Memories using
laser-PEEM

Kentaro Kinoshita

Tokyo University of
Science63

60-eV レーザーを用いた時間分解光電子分光の
開発

石坂

香子

東京大学

大学院工学系研 The development of time-resolved photoemission using
60eV laser
究科

Kyoko Ishizaka

The University of
Tokyo

64

収差補正型光電子顕微鏡の建設と利用研究

小嗣真人

東京理科大学

基礎工学部

Masato Kotsugi

Tokyo University of
Science65

鉄系超伝導体のレーザー光電子分光

下志万

理化学研究所

創発物性科学研
Laser-ARPES on Fe superconductor
究センター

Takahiro Shimojima

RIKEN

66

光電子分光法を用いた各種分子性結晶の電子状態の研究及び装置の低温化

木須

孝幸

大阪大学

大学院基礎工学 Research on electron state of molecular crystals using
photoemission spectroscopy
研究科

Takayuki Kisu

Osaka University

担当所員：岡﨑尚睦

貴博

Construction and utilization research of aberration correction
photoelectron emission microscopy

浩三

67

時間分解光電子分光や超高分解能光電子分光を用いた超伝導体や強相関物質の研究

吉田 鉄平

京都大学

大学院人間・環 Laser ARPES study on superconductors and strongly-correlated
Teppei Yoshidamaterials
境学研究科

Kyoto University

68

固体中のマヨラナ粒子の研究

松田 祐司

京都大学

大学院理学研究 Study of Majorana Fermion in Solids by Laser Photoemission
Spectroscopy
科

Yuji Matsuda

Kyoto University

Masatoshi Sato

Kyoto University

Masatoshi Sato

Kyoto University

69

〃

佐藤 昌利

京都大学

基礎物理学研究所

70

FeSe 超伝導体における BCS-BES クロスオーバ
ーの研究

紺谷 浩

名古屋大学

大学院理学研究
Study of BCS-BES crossover in FeSe superconductors
科

〃

No.

課題名

氏名

71

時間分解光電子分光を用いた強相関物質の研究

溝川72

超高分解能レーザー光電子分光による高温超伝
導体の研究

チャン
イル

貴司
ウェ

所属

Title
Time-resolved photoemmission study on strongly-correlatedmaterials

早稲田大学

理工学術院

上智大学

機能創造理工学 Study of high - Tc superconductors by high-resolution laser
ARPES
科

Name

Organization

Takashi Mizokawa

Waseda University

Zhang Weilu

Sopia University

一般研究員 / General Researcher
No.

課題名

担当所員：瀧川

氏名

所属

Title

Name

Organization

仁1

有機三角スピン系の核磁気共鳴による磁気誘電
現象の解明

細越

裕子

大阪府立大学

大学院理学系研 NMR study on the magnetodielectric properties of organic
triangular spin system
究科

Yuko Hosokoshi

Osaka Prefecture
University

2

〃

三好

克典

大阪府立大学

大学院理学系研
究科〃

Katsunori Miyoshi

Osaka Prefecture
University

3

〃

瀬戸川

大阪府立大学

大学院理学系研
究科〃

Hiroki Setogawa

Osaka Prefecture
University

Osamu Nakamura

Okayama University of
Science4

YbH2+x の磁性と伝導担当所員：榊原大喜中村修

岡山理科大学研究 ･ 社会連携
Magnetic and transport properties in YbH2+x
センター

俊郎

ISSP Activity Report 201971

5重い電子系超伝導体の対称性の決定

町田

一成

立命館大学

理工学部

Determination of the pairing symmetry of heavy Fermion
superconductors

Kazushige Machida

Ritsumeikan
University

6重い電子系化合物が示す非従来型超伝導と磁性
の相関

横山

淳

茨城大学

理学部

Interplay between unconventional superconductivity andmagnetism in heavy-fermion compounds

Makoto Yokoyama

Ibaraki University

7

〃

ラフマント

茨城大学

理学部

Rahmanto

Ibaraki University8

特異な強磁性転移を示す Yb2Ti2O7 の誘電特性

安井

明治大学

理工学部

Dielectric properties of Yb2Ti2O7 with anomalous
ferromagnetic transition

Yukio Yasui

Meiji University

9

トポロジカル超伝導のネマチック相研究孫

青山学院大学

理工学部

Study of the nematic phase of topological superconductors

Yue SunAoyama Gakuin
University

10

フラストレート系有機磁性体の低温物性測定山口博則

大阪府立大学

大学院理学系研 Low temperature physical properties of frustrated organic
radical compounds
究科

Hironori Yamaguchi

Osaka Prefecture
University

沖田

大輝

大阪府立大学

大学院理学系研
究科

Taiki Okita

Osaka Prefecture
University

11

〃

幸夫

悦

〃

〃

72
ISSP Activity Report 2019

No.

課題名

氏名

所属

12

SmPt2Cd20 の低温磁化測定

広瀬

雄介

新潟大学

理学部

13

Ba2+-Fe3+-Ti4+ 酸化物磁性体の磁場中誘電特性

神島

謙二

埼玉大学

14

〃

安田

直生

15

〃

神

16

〃

17
18

Name

Organization

Hirose Yusuke

Niigata University

大学院理工学研 Dielectric properties of Ba2+-Fe3+-Ti4+ magnetic oxides undermagnetic field
究科

Kenji Kamishima

Saitama University

埼玉大学

大学院理工学研
究科〃

Naoki Yasuda

Saitama University

治樹

埼玉大学

大学院理工学研
究科〃

Haruki Kan

Saitama University

高橋 久由

埼玉大学

大学院理工学研
究科〃

Hisayoshi Takahashi Saitama University

純良単結晶を用いた新規遷移金属超伝導体の精
密比熱測定

加瀬

直樹

東京理科大学

理学部

フラストレート系有機磁性体の低温物性測定河野洋平

大阪府立大学

大学院理学系研 Low temperature physical properties of frustrated organic
radical compounds
究科担当所員：山下Title
Low temperature magnetization measurements of SmPt2Cd20

Superconducting state of the transition-metal based
compounds elucidated through specific heat measurements

Kase Naoki

Tokyo University of
ScienceYohei Kono

Osaka prefecture
University穣

19

三角格子反強磁性体の低温比熱測定

柄木

良友

琉球大学

教育学部

Low temperature specific heat measurements of triangularantiferromagnets.

Yoshitomo Karaki

University oy The
Ryukyus20

重い電子系超伝導体 CeCoIn5 の超低温における宍戸
dHvA 効果の角度依存性

寛明

大阪府立大学

大学院工学研究 Angular dependence of the dHvA effect at ultra-low
temperatures in a heavy fermion superconductor CeCoIn5科

Hiroaki Shishido

Osaka Prefecture
University21

磁場角度分解熱輸送測定による新規超伝導の研
究

水上

雄太

東京大学

大学院新領域創 Studies on novel superconductors by field-angle-resolved
thermal transport measurements
成科学研究科Yuta Mizukami

The University of
Tokyo

22

重い電子系化合物 YbNi2Si3 の超低温磁気トルク
大原
測定

繁男

名古屋工業大学 物理工学科

中村翔太

名古屋工業大学 物理工学科

米谷

玲皇

東京大学

裕信

23

〃

担当所員：勝本
24

Magnetic torque meansurements of heavy fermion YbNi2Si3 at
Shideo Ohara
ultra low temperature

Nagoya Institute ofTechnology

Shota Nakamura

Nagoya Institute ofTechnology

大学院新領域創
Development of nanosensing device
成科学研究科

Reo Kometani

The University of
Tokyo

東京大学

大学院新領域創成科学研究科〃

Nishida Hironobu

The University of
Tokyo

東京大学

大学院新領域創成科学研究科〃

Penekwong Khemnat

The University of
Tokyo

〃

信吾

ナノセンシングデバイスの開発

25

〃

西田

26

〃

ペンエークウォン ケーマ
ナット

No.

課題名

27

〃

氏名
ゴ

チャウ

所属
東京大学

大学院新領域創成科学研究科

Title

〃

Name

Organization

Gu Chao

The University of
Tokyo

28

遷移金属ダイカルコゲナイド層状物質半導体 / 金
石黒
属界面状態の電気輸送特性による研究

亮輔

日本女子大学

理学部

Sutudy of electrical transport property in transition metal
dichalcogenide layered material semiconductor /metalinterface state

Ryosuke Ishiguro

Japan Women's
University29

量子ホール効果測定のための高移動度半導体試
料作成

福田

昭

兵庫医科大学

物理学教室

Development of the hogh mobility semiconductor sample forthe measurements in the meansurements in the quantum Hall

Akira Fukuda

Hyogo College ofMedicine

Motoi Kimata

Tohoku university

担当所員：大谷義近

30

5d 電子系酸化物薄膜におけるスピンホール効果

木俣

基

東北大学

金属材料研究所 Spin Hall effect in 5d oxide thin films

31

空間反転対称性の破れた結晶構造に発現する電流誘起磁化の電気的検出

木俣

基

東北大学

金属材料研究所

Electrical detection of current induced magnetization in noncentrosymmetric crystal structure

Motoi Kimata

Tohoku university

32

希土類金属間化合物の強磁場低温物性研究

海老原

孝雄

静岡大学

学術院理学領域

Physical properties in rare earth intermetallic compounds athigh magnetic fields in low temperature

Takao Ebihara

Shizuoka University

ジュマエダ・
ジャトミカ

静岡大学

大学院自然科学
教育部〃

Jumaeda Jatmika

Shizuoka University

育三

東京学芸大学

自然科学系

Positron-annihilation studies of Al-Pd-Ru quasicrystal and its
approximant crystals

Ikuzo Kanazawa

Tokyo Gakugei
University

高橋潤

東京学芸大学

大学院教育学研
究科〃

Jun Takahashi

Tokyo Gakugei
University

大野真也

横浜国立大学

大学院工学研究
Analysis of electronic states of monolayer graphene
院

Shinya Ohno

Yokohama National
University

青柳 良英

横浜国立大学

大学院理工学府〃

Yoshihide Aoyagi

Yokohama National
University

寛東京工業大学

物質理工学院

Electronic structure of Bi-In surface alloy grown on Si(111)4 ×
1-In substrates

Kan Nakatsuji

Tokyo Institute ofTechnology

金野達

東京工業大学

物質理工学院〃

Tatsu Konno

Tokyo Institute ofTechnology

40

酸素サーファクタントを用いた Fe 薄膜の成長過中辻程と電子状態寛東京工業大学

物質理工学院

Oxygen surfactant assisted growth of Fe thin-films and theirelectronic states

Kan Nakatsuji

Tokyo Institute ofTechnology

41

レアメタルフリー磁性材料 L10-FeCo の磁気特
性の解析

真人

東京理科大学

基礎工学部

Analysis of magnetic properties of rare-metal-free supermagnetKotsugi Masato

Tokyo University of
Science33〃

担当所員：小森
34

ISSP Activity Report 2019

35
36
37
38
39

文夫

Al-Pd-Ru 準結晶・近似結晶における空孔濃度の金沢
研究〃
単層グラフェンの電子状態の解析〃

Si(111)4 × 1-In 基板上における Bi-In 表面合金の
中辻
電子状態
〃

73

小嗣

74
ISSP Activity Report 2019

No.

課題名

氏名

所属

42

〃

高橋

優樹

東京理科大学

基礎工学部

43

金属／半導体表面上への超薄膜およびナノ構造
薄膜の形成とその磁化ダイナミックスの観測河村紀一

放送技術研究所

新機能デバイス Study on magnetic dynamics of ultra-thin films and nanostructures on metal / semiconductor surfaces
研究部

NHK Science andNorikazu Kawamura Technology ResearchLaboratories

44

STM を用いた L10-FeNi 表面における N サーフ
小嗣ァクタント効果の解析

真人

東京理科大学

基礎工学部

Masato Kotsugi

Tokyo University of
ScienceYuuki Takahashi

Tokyo University of
Science

Title〃

Study of N surfactant effect on L10-FeNi by using STM

Yuuki Takahashi

Organization
Tokyo University of
Science

45

〃

高橋

優樹

東京理科大学

基礎工学部

46

面内圧縮された Cu(001) 表面における局所構造
緩和 (2)

山田

正理

中央大学

理工学部

Local structural rearrangement on a compressed Cu(001)surface (2)Masamichi Yamada

Chuo University

47

真空転写法により形成した積層グラフェンの電
子状態評価

田中

悟

九州大学

大学院
工学研究院

Evalution of electronic structures of stacked graphenefabricated by vacuum transfer technique.

Satoru Tanaka

Kyushu University

48

〃

今村

均

九州大学

大学院
工学研究院

Hitoshi Imamura

Kyushu University

彰博

東京工業大学

物質理工学院Akihiro Kimura

Tokyo Institute ofTechnology

由起子

北陸先端科学技 マテリアルサイ STM investigation of epitaxial silicene, germanene, and theirheterostructures
術大学院大学
エンス系

Yukiko Takamura

JAIST

49

酸素サーファクタントを用いた Fe 薄膜の成長過木村
程と電子状態担当所員：長谷川50

エピタキシャルシリセン、ゲルマネン及びそのヘテロ構造の低温走査トンネル顕微鏡観察

52

高村

大久保

勇男

物質・材料研究 機能性材料研究 Development of an efficient thin film growth thechnique using
Isao Ohkubo
a mechine learning approach機構
拠点

National Institute forMaterials Science

淳

IRAS による環状分子膜の構造評価担当所員：秋山

Oxygen surfactant assisted growth of Fe thin-films and theirelectronic states

ミック

機械学習を用いた高効率薄膜作成手法の開発

担当所員：吉信〃幸雄

担当所員：リップマー
51

〃

Name

川井

茂樹

物質・材料
研究機構

国際ナノアーキ
テクト二クス研 Structual analysis of cyclic moneculay layer by IRAS
究拠点

Shigeki Kawai

Natuinal Institute forMaterials Science

Miyabi Hiyama

Gunma University

Ryohei Ono

Gunma University

英文53

オキナワマドホタルルシフェラーゼを用いた生物発光における pH 依存性の定量的評価

樋山

みやび

群馬大学

大学院理工学府

54

〃

小野

稜平

群馬大学

理工学部

Quantitative evaluation of pH dependence in Pyrocoeliamatsumurai-firefly bioluminescence

〃

No.

課題名

55

北米産ホタルを用いた生物発光スペクトルにおける重金属の影響調査

樋山

みやび

群馬大学

大学院理工学府

56

〃

手塚

大輔

群馬大学

理工学部

57

多波長励起フォトルミネッセンス測定によるGaPN 混晶のアップコンバージョン発光に関する 矢口
研究

裕之

埼玉大学

大学院理工学研 Multiple wavelength excited photoluminescence measurements
Hiroyuki Yaguchi
of up-conversion luminescence of GaPN alloys
究科

Saitama University

58

多波長励起による GaPN 混晶のアップコンバー
ジョン発光に関する研究

古田

和

埼玉大学

大学院理工学研 Multiple wavelength excited photoluminescence measurements
Kazu Furuta
of up-conversion luminescence of GaPN alloys
究科

Saitama University

59

〃

高宮

健吾

埼玉大学

総合技術支援センター

60

希薄磁性半導体超格子 GaGdAs:Si/GaAs におけるバースタイン・モスシフトの測定によるフェルミ面位置とキャリア誘起強磁性の関係解明

宮川

勇人

香川大学

創造工学部

61

〃

高藤

誠

香川大学

大学院工学研究
科

勇人

香川大学

創造工学部

62

氏名

希薄磁性半導体 GaGdAs を用いたスピン LED に宮川
おける円偏光度制御の検証

所属

Title
Effects on heavy metals in Photinus pyralis fireflybioluminescence spectra

〃

Name

Organization

Miyabi Hiyama

Gunma University

Daisuke Tezuka

Gunma University〃

Kengo Takamiya

Saitama University

Relationship between Fermi surface position and carrier
induced ferromagnetism by measuring Burstein-Moss Shift indiluted magnetic semiconductor superlattice GaGdAs:Si/GaAs

Hayato Miyagawa

Kagawa University〃

Makoto Takafuji

Kagawa University

Hayato Miyagawa

Kagawa University

Akihiro Funabiki

Kagawa University

Control of circular polarization light of spin-polarized lightemitting diodes using diluted magnetic semiconductor

ISSP Activity Report 2019

63

〃

船曳

晃弘

香川大学

大学院工学研究科

64

宇宙線望遠鏡の焦点面ライトガイドの反射率測
定

吉田

龍生

茨城大学

理学部

65

超伝導転移端センサ用金属薄膜の光学測定

遠藤

護

東京大学

大学院工学系研 Optical property measurement of metal membrene forsuperconducting transition edge sensor
究科

Mmoru Endo

The University of
Tokyo

〃

松山

幹尚

東京大学

大学院工学系研
究科

Mikihisa Matsuyama

The University of
Tokyo

67

層状構造を有する金属間化合物のディインター
カレーションと低温物性

山田

高広

東北大学

多元物質科学研 Ground-state phase diagram and magnetic excitations of
theKitaev-J- Γ model on a honeycomb lattice
究所

Takafumi Suzuki

University of Hyogo68

物性における数値繰り込み群法の応用

原田

健自

京都大学

大学院情報学研 Application of numerical renormalization group method in
condensed-matter physics
究科

Kenji Harada

Kyoto University

蜂の巣格子 Kitaev-J- Γ模型の基底状態相図と磁
鈴木
気励起

隆史

兵庫県立大学

大学院工学研究 Characterization of electric and magnetic properties ofintermetallic compounds with layered structures
科

Takahiro Yamada

Tohoku University

66
担当所員：川島担当所員：廣井75

69〃

Reflectance measurement of focal plane light concentrators for
Tatsuo Yoshidacosmic-ray telescopes〃

Ibaraki University

直輝

善二

76

No.
70

課題名

氏名

ISSP Activity Report 2019

基板上に成膜した CoPt 規則化強磁性体の磁化測
山浦
定

所属

Title

Name

Organization

淳一

東京工業大学

元素戦略研究セ Magnetization measurement of CoPt ordered ferromagnet
fabricated on substrate
ンター

Junichi Yamaura

Tokyo Institute ofTechnology

71

〃

真島

豊

東京工業大学

科学技術創成研究院・フロンテ
ィア材料研究所〃

Yutaka Majima

Tokyo Institute ofTechnology

72

〃

遠山

諒

東京工業大学

物理工学院〃

Ryo Toyama

Tokyo Institute ofTechnology

73

希土類 4 ｆ電子数制御による新規アクチュエー
タ材料の創製

竹中

康司

名古屋大学

大学院工学研究 Development of novel volume-change-driven actuatormaterials by control of rare earth 4f electron number
科

Koshi Takenaka

Nagoya University

74

〃

横山

泰範

名古屋大学

大学院工学研究
科〃

Yasunori Yokoyama

Nagoya University

75

〃

水野

陽介

名古屋大学

大学院工学研究科〃

Yosuke Mizuno

Nagoya University

76

〃

長谷川

名古屋大学

大学院工学研究科〃

Haruka Hasegawa

Nagoya University

77

新規ハイパーハニカム格子磁性体β -ZnIrO3 の
磁化測定

原口

祐哉

東京農工大学

物理システム工学科

Magnetization measurement of the novel hyperhoneycomb
lattice magnet β -ZnIrO3

Yuya Haraguchi

University ofAgriculture anf
Technology

キュービックアンビルセルを用いた NMR 測定開
藤原
発

直樹

京都大学

大学院人間・環 Development of NMR measurements under pressure using a
cubic-anvil cell
境学研究科

Naoki Fujiwara

Kyoto University

Takanori Kuwayama Kyoto University

担当所員：上床
78

遥加

美也

79

〃

桑山

昂典

京都大学

大学院人間・環境学研究科

80

FeSe1-xTex の単結晶試料における高圧下物性研
究

松浦

康平

東京大学

大学院新領域創The high pressure study on single-crystallineFeSe1-xTex
成科学研究科Kouhei Matsuura

The University of
Tokyo

81

三角格子反強磁性体の低温磁性

柄木

良友

琉球大学

教育学部

Low temperature magnetism of triangular antiferromagnets

Yoshitomo Karaki

University oy The
Ryukyus82

重い電子系希土類化合物の dHvA 効果

摂待

力生

新潟大学

理学部

de Haas-van Alphen effect in heavy fermion cerium
compounds

Rikio Settai

Niigata University

Sumika Sano

Niigata University

Toru Shigeoka

Yamaguchi University

Kiyoharu Uchima

Okinawa Christian
Junior College

〃

83

〃

佐野

純佳

新潟大学

理学部

〃

84

多形化合物 RIr2Si2(R= 希土類）の結晶育成と物
質評価 6

繁岡

透

山口大学

大学院創成科学 Crystal growth and characterization of polymorphic
compounds RIr2Si2 (R=rera earth) 6
研究科

85

〃

内間

清晴

沖縄キリスト教
総合教育系
短期大学

〃

No.
86
87
88
89
90
91

課題名

氏名

擬三元化合物 Ce1-xMxNiC2(M = Y, La) の結晶育繁岡成と物質評価 2〃多形化合物 RIr2Si2(R= 希土類）磁気特性 4〃
高圧下における Eu 化合物の価数転移の探索
〃

透

所属
山口大学

Title

大学院創成科学 Crystal growth and characterization of pseudo-ternarycompounds Ce1-xMxNiC2(M = Y, La) 2
研究科

Shunnsuke
Yamada

沖縄キリスト教
総合教育系
短期大学

繁岡

透

山口大学

内間

清晴

沖縄キリスト教
総合教育系
短期大学

大貫

惇睦

琉球大学

理学部

本多

史憲

東北大学

金属材料研究所〃

大学院創成科学 Magnetic characteristics of polymorphic compounds
RIr2Si2(R=rare earth) 4研究科〃
Investigation of valence transition on Eu compounds underhigh pressure

〃

Name

Organization

Toru Shigeoka

Yamaguchi University

Kiyoharu Uchima

Okinawa Christian
Junior College

Toru Shigeoka

Yamaguchi University

Kiyoharu Uchima

Okinawa Christian
Junior College

Yoshichika Onuki

University of the
Ryukyus

Fuminori Honda

Tohoku University

Fuminori Honda

Tohoku University

92

ウラン化合物の磁性の圧力効果

本多

史憲

東北大学

金属材料研究所 Effect of Pressure on the magnetism of uranium compounds

93

Ce2MgGe2 の高圧力下電気抵抗測定

広瀬

雄介

新潟大学

理学部

山田

峻輔

新潟大学

理学部

〃

Shunnsuke Yamada

Niigata University

95

カミオカイト型酸化物 (Fe1-xZnx)2Mo3O8 の高圧
赤星
下における物性

大介

東邦大学

理学部

Physical properties of (Fe1-xZnx)2Mo3O8 under high pressure

Daisuke Akahoshi

Toho University

96

六方晶 Hf1-xTaxFe2 の磁気特性

松本

圭介

愛媛大学

大学院理工学研
Magnetic properties of hexagonal Hf1-xTaxFe2
究科

Keisuke Matsumoto

Ehime University

石原

憲

愛媛大学

大学院理工学研
究科

Ken Ishihara

Ehime University

達也

九州大学

大学院工学研究
Development of 3He insert for SQUID magnetometer
院

Tatsuya Kawae

Kyushu University

司

文

九州大学

大学院工学府Si WenKyushu University

100 直方晶 Co1-xNixMnSi の磁気熱量効果

松本

圭介

愛媛大学

大学院理工学研
Magnetocaloric properties of orthorhombic Co1-xNixMnSi
究科

Keisuke Matsumoto

Ehime University

101

〃

今田

敦士

愛媛大学

工学部

〃

Atsushi Imada

Ehime university

102

〃

高畦

恋

愛媛大学

工学部

〃

Ren Takaaze

Ehime University

94

ISSP Activity Report 2019

97
98
99

〃

〃

SQUID 磁束計用 3He インサートの開発および低
河江
温磁化測定
〃

Electrical resistivity measurement under pressure of Ce2MgGe2 Yusuke Hirose〃〃

Niigata University

77

78

No.

課題名

氏名

103 CeCoSi の圧力下電気抵抗測定

所属

Title

Name

Organization

ISSP Activity Report 2019川村幸裕

室蘭工業大学

大学院工学研究
Measurement of electrical resistivity under pressure of CeCoSi Yukihiro Kawamura
科

Muroran Institute ofTechnology

Iduru Shigeta

Kagoshima University

Masanobu Shiga

Kyushu University104

ハーフメタルホイスラー合金の磁気体積効果に
関する研究

重田

出

鹿児島大学

大学院理工学研 Study on the magneto-volume effect of half-metallic Heusler
alloys究科

105

重い電子系物質における 3He 温度領域での磁化
測定

志賀

雅亘

九州大学

大学院工学府(2) 藤原哲也

山口大学

大学院創成科学 Single crystal growth of Co substituted HoRh2-xCoxSi2
compounds II研究科

Tetsuya Fujiwara

Yamaguchi University

山本

嵩

山口大学

大学院創成科学研究科

Shu Yamamoto

Yamaguchi University

108 Ho1-xLaxRh2Si2 単結晶の磁場中比熱測定

藤原

哲也

山口大学

大学院創成科学 Specific heat measurement under magnetic field of
Ho1-xLaxRh2Si2 single crystal
研究科

Tetsuya Fujiwara

Yamaguchi University

109

山本

嵩

山口大学

大学院創成科学研究科

Shu Yamamoto

Yamaguchi University

110 EuMn2Ge2 単結晶の磁場中比熱測定

藤原

哲也

山口大学

大学院創成科学 Specific heat measurement under magnetic field of
EuMn2Ge2 single crystal
研究科

Tetsuya Fujiwara

Yamaguchi University

111

山本 嵩

山口大学

大学院創成科学研究科

Shu Yamamoto

Yamaguchi Univ

112 混晶系 HoRh2-xCo2Si2 の磁化測定

藤原

哲也

山口大学

大学院創成科学 Magnetization measurements of pseudo-ternary system
HoRh2-xCo2Si2研究科

Tetsuya Fujiwara

Yamaguchi University

113

〃

山本

嵩

山口大学

大学院創成科学研究科

Shu Yamamoto

Yamaguchi University

114

希土類強相関物質における新奇揺らぎの探索と
圧力効果

中野

智仁

新潟大学

大学院自然科学 Investigation novel fluctuation in rare earth strongly correlated
Tomohito Nakano
electron system
研究科

Niigata University

115

〃

名坂

直紀

新潟大学

工学部

Naoki Nasaka

Niigata University

阿曽

尚文

琉球大学

理学部

Evaluation of fundamental physical properties in
YbYb(Co1-xIrx)2Zn20 IV

Naofumi Aso

University of the
Ryukyusde Haas-van Alphen effect under pressure in transition metal
chalcogenide

Rikio Settai

Niigata University〃

Kenta Muto

Niigata University

106 HoRh2Si2 の Co 置換系化合物の単結晶育成
107

〃

〃

〃

116 Yb(Co1-xIrx)2Zn20 の 基本物性評価 IV

Magnetization measurements in 3He temperature region forheavy fermion systems

〃

〃

〃

〃

〃

117

遷移金属カルコゲナイドの圧力下 dHvA 効果の
研究

摂待

力生

新潟大学

理学部

118

〃

武藤

研太

新潟大学

大学院自然科学
研究科

久田

旭彦

徳島大学

大学院社会産業
Synthesis and pressure-effect study of iron-selenide compound Akihiko Hisada
理工学研究部

119 鉄セレン系化合物の合成および圧力効果

Tokushima University

No.

課題名

氏名

所属

Title

徹二郎

久留米工業大学

建築・設備工学
Study of magnetic properties in MnCo1-xGe alloys
科

美帆

信州大学

理学部

矢口

達志

信州大学

大学院総合理工学研究科

123 遷移金属化合物の高圧力下の輸送特性

仲間

隆男

琉球大学

理学部

124

太田

譲二

琉球大学

大学院理工学研
究科

10 GPa を超えた圧力領域まで拡張した有機導体
村田の圧力下物性の探索

惠三

大阪経済法科大 ２１世紀社会総 Pressure Effect of Organic Conductors in the pressure region
学
合研究センター beyond 10 GPa.

120 MnCo1-xGe 合金の磁気特性に関する研究
121
122

125

江藤

高圧下電気抵抗による CeT2X8(T: 遷移金属元素，
中島
X:Al,Ga) の磁性研究
〃

〃

Name

Organization

Tetsujiro Eto

Kurume Institute ofTechnology

Magnetism of CeT2X8 ( T: transition metal element, X: Al, Ga)
by electrical resistivity under high pressure.

Miho Nakashima

Shinshu University〃

Tatsushi Yaguchi

Graduate School
Shinshu University

Takao Nakama

University of the
Ryukyus

Jouji Ota

University of the
Ryukyus

Keizo Murata

Osaka University of
Economics and Law

Pressure effect on transport properties of transition metalcompounds〃

ISSP Activity Report 201979126 磁場で合成した Sm2Fe17N3 の磁気特性

小山

佳一

鹿児島大学

大学院理工学研 Magnetic properties of Sm2Fe17N3 prepared under magnetic
fields究科

Keiichi Koyama

Kagoshima University

127

尾上

昌平

鹿児島大学

研究推進機構研
究支援センター

Masahira Onoue

Kagoshima University

128 Mn2Sb 基化合物のスピン再配列

三井

好古

鹿児島大学

大学院理工学研
Spin-reorientation in Mn2Sb-based compounds
究科

Yoshifuru Mitsui

Kagoshima University

129

〃

野口

滉平

鹿児島大学

大学院理工学研
究科

Kohei Noguchi

Kagosima University

130

強相関電子系化合物における圧力および磁場誘起量子相転移の探索

大橋

政司

金沢大学

理工研究域

Masashi Ohashi

Kanazawa University

131

〃

稲森

庸介

金沢大学

大学院自然科学研究科

Yosuke Inamori

Kanazawa University

132

Fe 置換 Ni2MnGa ホイスラー合金の磁化および相転移温度の高圧効果

安達

義也

山形大学

大学院理工学研 Pressure effect of the magnetization and phase transition
temperature for the Fe-substituted Ni2MnGa Heusler alloys
究科

Yoshiya Adachi

Yamagata University

133

〃

吉田

圭吾

山形大学

工学部

Keigo Yoshida

Yamagata University

134

層状硫化ビスマス超伝導体 LaOBiS2 の圧力誘起超伝導の検証加瀬直樹

東京理科大学

理学部

Pressure-induced superconductivity of the BiS2-based
superconductors

Naoki Kase

Tokyo University of
Science

135 圧力誘起価数転移の探索と高圧下輸送特性

辺土

正人

琉球大学

理学部

Searching of pressure-induced valence transition and transport
Masato Hedo
properties under high pressure

136

仲井間

琉球大学

大学院理工学研
究科

〃

〃

憲李

〃

〃
Pressure and field induced quantum phase transition instrongly correlated electron systems

〃

〃

〃

Kenri Nakaima

University of the
Ryukyus
University of the
Ryukyus

80

No.

課題名

氏名

所属

Title

ISSP Activity Report 2019

Name

Organization

Searching for pressure-induced Kondo state on Eu compounds Masato Hedo

University of the
Ryukyus137 Eu 化合物の圧力誘起近藤状態の探索

辺土

正人

琉球大学

理学部

138

〃

伊覇

航

琉球大学

大学院理工学研
究科〃

Wataru Iha

University of the
Ryukyus

139

〃

松田

進弥

琉球大学

大学院理工学研
究科〃

Shinya Matsuda

University of the
Ryukyus140

スピングラスを持つ Mn1-xCoxNiGe 系化合物の高圧化磁化測定

伊藤

昌和

鹿児島大学

総合科学域

Magnetization of Mn1-xCoxNiGe with spin glass system underhigh pressure

Masakazu Ito

Kagoshima University

141

〃

白濱

透

鹿児島大学

大学院理工学研
究科〃

Toru Shirahama

Kagoshima University

芳賀芳範

日本原子力研究 先端基礎研究セ
Pressure effect on actinide ferromagnetic compounds
開発機構
ンター

Yoshinori Haga

Japan Atomic Energy
Agencyλ-(BEST)2GaCl4 の超高圧下電気抵抗測定による
小林
λ型塩における分子置換効果の研究

拓矢

埼玉大学

Study of molecular substitution effect on λ-type organic
大学院理工学研
conductor in λ-(BEST)2GaCl4 by electric resistivity
究科
measurements under ultra-high pressures

Takuya Kobayashi

Saitama University

142 アクチノイド強磁性化合物の圧力効果
143
144

〃

谷口

弘三

埼玉大学

大学院理工学研
究科〃

Hiromi Taniguchi

Saitama University

145

〃

綱川

仁志

埼玉大学

大学院理工学研
究科〃

Hitoshi Tsunakawa

Saitama University

146

〃

生沼

浩介

埼玉大学

大学院理工学研
究科〃

Kohsuke Oinuma

Saitama University

147

〃

小澤

宏彬

埼玉大学

大学院理工学研
究科〃

Hiroaki Ozawa

Saitama University

148

〃

伊藤

有咲

埼玉大学

理学部

〃

Arisa Ito

Saitama University

ターンバックル式小型 DAC を用いた多重極限下
狩野
電気抵抗測定みか

日本工業大学

共通教育学群・ Electrical resistivity measurements under multi-extreme
conditions by using a micro-turnbuckle DAC
物理

Mika Kano

Nippon Institute ofTechnology
Shimane University

149

150 RE3TiBi5(RE = 希土類元素 ) の圧力下比熱測定

本山

岳

島根大学

大学院自然科学 Specific heat measurements of RE3TiBi5 (RE = rare earth )ternary compounds under pressure
研究科

Gaku Motoyama

151

坪内

将紘

島根大学

大学院自然科学研究科〃

Masahiro Tsubouchi Shimane University

キュービックアンビルセルを用いた NMR 測定開
中川
発

悟志

京都大学

大学院人間
環境学研究科

Development of NMR measurements under pressure using a
cubic-anvil cell152〃

担当所員：尾崎泰助

Satoshi Nakagawa

Kyoto University

No.

課題名

氏名

153

実験と計算の協奏による二次元材料の構造・電子状態解析及び制御

アントワーヌフロランス

Analysis and control of crystal and electronic structures of 2D
北陸先端科学技 マテリアルサイ
materials through concerted collaboration of experiment andAntoine Fleurence
術大学院大学
エンス系
theory

JAIST

154

〃

新田

寛和

北陸先端科学技 大学院先端科学
術大学院大学
技術研究科

JAIST

155

高分解能チョッパー分光器による物質のダイナ
ミクスの研究伊藤晋一

高エネルギー加 物質構造科学研 Studies on Dynamics in Condensed Matters by using the High
Resolution Chopper Spectrometer
速器研究機構究所

Shinichi Itoh

156

〃

横尾

哲也

高エネルギー加 物質構造科学研
速器研究機構究所〃

Tetsuya Yokoo

157

〃

羽合

孝文

高エネルギー加 物質構造科学研
速器研究機構究所〃

Takafumi Hawai

158

〃

齋藤

開

高エネルギー加 物質構造科学研
速器研究機構究所〃

Hiraku Saito

阿曽

尚文

琉球大学

160 空間反転対称性の破れた超伝導体の結晶性評価

古川

はづき

お茶の水女子大
基幹研究院
学

161

〃

左右田

162

フラストレーションの強い量子反強磁性体の結
晶方位決定

163

サイト選択アニオンドーピングによるCe(Te,Se)3 の比熱測定担当所員：益田

所属

Title

〃

Name

Hirokazu Nitta

隆嗣

159 (Yb1-xLux)Co2Zn20 の極低温比熱測定

Ⅲ

理学部

High Energy
Accelerator Research
Organization
High Energy
Accelerator Research
Organization
High Energy
Accelerator Reserach
Organization
High Energy
Accelerator Research
Organization

Specific heat measurement at very low temperature on(Yb1-xLux)Co2Zn20 III

Naofumi Aso

University of the
Ryukyus

Evaluation of single crystal quality of non-centrosymmetricsuperconductors

Hazuki Furukawa

Ochanomizu
University

Minoru Soda

RIKEN

ISSP Activity Report 201981

稔

理化学研究所

創発物性科学研
究センター

田中

秀数

東京工業大学

理学院

植田

大地

沖縄科学技術大 量子物質科学ユ Specific heat meansurement of site selective anion doping
Ce(Te,Se)3
学院大学
ニット

イットリウム積層化合物 Y4TGe8(T: 遷移164 金属 ) 及びインターカレーション化合物
MxTaS2(M:Ni,Co) の強磁場磁化測定

道岡

千城

京都大学

大学院理学研究 High-field magnetization measurements of Y4TGe8(T:transition
Chishiro Michioka
metal) and MxTaS2(M:Ni,Co)
科

165

〃

山中

俊介

京都大学

大学院理学研究
科

166

幾何学的フラストレート磁性体の強磁場磁化測
定

菊池

彦光

福井大学

学術研究院工学
Magnetization measurements of the frustrated magnets
系部門

167

1/2 量子磁化プラトーを示す Ni2V2O7 の強磁場
磁化測定

長谷

正司

物質・材料研究 先端材料解析研 High-field magnetization measurements on 1/2 quantum
magnetization plateau compound Ni2V2O7
機構
究拠点

担当所員：金道

Organization〃

Determination of the crystal orientations for strongly frustrated
Hidekazu Tanaka
quantum magnets
Daichi Ueta

School of Science
Okinawa Institute of
Science and Technology
Granduate University

浩一〃

Kyoto University

Shunsuke Yamanaka Kyoto University
Hikomitsu Kikuchi

University of Fukui

Masashi Hase

National Institute forMaterials Science

82
ISSP Activity Report 2019

No.

課題名

168

BiS2 系超伝導体で実現する巨大上部臨界磁場の
検証

加瀬

直樹

東京理科大学

理学部

Upper critical field of the BiS2-based superconductors

Naoki Kase

Tokyo University of
Science169

topological Kondo insulator SmB6,YbB12 の磁化特性と比熱

伊賀

文俊

茨城大学

理学部

Magnetic and thermal properties of topological Kondo
insulator SmB6 and YbB12

Fumitoshi Iga

Ibaraki University

170

〃

松浦

航

茨城大学

大学院理工学研
究科

Wataru Matsuura

Ibaraki university

文俊

茨城大学

理学部

中山

裕之

茨城大学

大学院理工学研究科

高圧合成による Y ベース Pr 置換 B12 の強磁場中
伊賀の磁性と比熱，伝導

文俊

茨城大学

理学部

171

高圧合成新規希土類 Ce12 ホウ化物の強磁場中の
伊賀
磁化と比熱

172
173

氏名

〃

所属

Title

〃

Name

Magnetic and thermal properties in high magnetic fields of rareearth hexa- and dodeca-borides produced by high pressure
Fumitoshi Iga
synthesis〃

Organization

Ibaraki University

Hiroyuki Nakayama

Ibaraki university

Fumitoshi Iga

Ibaraki University

Takahiro Yamada

ibaraki university

Magnetic strain of MnNiGe-CoNiGe with spin-glass system inhigh magnetic field

Masakazu Ito

Kagoshima University〃

Toru Shirahama

Kagoshima University

Magnetic, transport and thermal properties in high magnetic
fields of Y1-xPrxB12 produced by high pressure synthesis

174

〃

山田

貴大

茨城大学

大学院理工学研
究科

175

スピングラスを持つ MnNiGe-CoNiGe 系化合物の高磁場磁歪測定

伊藤

昌和

鹿児島大学

総合科学域

176

〃

白濱

透

鹿児島大学

大学院理工学研
究科

177 金属ナノ結晶集合体の磁化特性

稲田

貢

関西大学

システム理工学
Magnetic properties of metal nanocrystal assemblies
部

Mitsuru Inada

Kansai University

178

〃

米澤

諒

関西大学

大学院理工学部

Ryo Yonezawa

Kansai University
Graduate School

179

フラストレーションの強い量子反強磁性体の強磁場磁化測定田中

秀数

東京工業大学

理学院

Magnetization measurements on highly frustrated quantum
magnets

Hidekazu Tanaka

School of Science

静岡大学

学術院理学領域

Electronic states at high magnetic fields in Heavy Fermion
systems

Takao Ebihara

Shizuoka University

Hiroshi Maruyama

Shizuoka University

担当所員：徳永〃〃将史

180 重い電子系における強磁場中の電子状態研究

海老原

181

〃

丸山

博史

静岡大学

大学院総合科学技術研究科

182

磁気光学顕微鏡による超伝導体中の量子渦の実空間非平衡ダイナミクス観測手法の確立

黒川

穂高

東京大学

大学院総合文化 Observing the real-space nonequilibrium dynamics of vortices
in superconductor with a magneto-optical microscope
研究科

Hodaka Kurokawa

The University of
Tokyo

広瀬

雄介

新潟大学

理学部

Yusuke Hirose

Niigata University

183 PrT2Cd20(T=Ni,Pd) の強磁場磁化測定

孝雄〃

High-field magnetization of PrT2Cd20(T=Ni,Pd) (T=Ni and Pd)

No.

課題名

氏名

所属

184

〃

高山

昂己

新潟大学

理学部

185

フラストレーションを有する磁性体の強磁場下での振る舞い香取

浩子

東京農工大学

186

〃

羽鳥

滋

187 逆スピネル化合物の強磁場磁化過程

香取

188

〃

189

Title

〃

Name

Organization

Koki Takayama

Niigata University

大学院工学研究 Magnetic properties of frustrated materials in high magnetic
fields院

Hiroko Katori

Tokyo Universityof Agriculture andTechnology

東京農工大学

大学院工学府Shigeru Hatori

浩子

東京農工大学

大学院工学研究
High-field magnetization process of inverse spinel materials
院

Hiroko Katori

太田

寛人

東京農工大学

大学院工学研究院〃

Hiroto Ohta

〃

徳永

柊介

東京農工大学

大学院工学府〃Shusuke Tokunaga

190

正四角台塔反強磁性体の強磁場中電気磁気特性
の測定

木村

健太

東京大学

大学院新領域創 High-field magnetoelectric properties square-cupola-based
antiferromagnets
成科学研究科

Kenta Kimura

The University of
Tokyo

191

多層ディラック電子系 AMnX2 (A=Sr,Ba. X=Sb,酒井Bi) における量子ホール効果の研究

英明

大阪大学

大学院理学研究 Study of the quantum Hall effect in multilayered Dirac fermion
Hideaki Sakai
systems AMnX2 (A=Ba,Sr. X=Sb, Bi)科

Osaka University〃

Tokyou Universityof Agriculture andTechnology
Tokyo Universityof Agriculture andTechnology
Tokyo Universityof Agriculture andTechnology
Tokyo Universityof Agriculture andTechnology

ISSP Activity Report 2019

192

〃

近藤

雅起

大阪大学

大学院理学研究科〃

Masaki Kondo

Graduate Schoolof Science Osaka
University

193

〃

中川

賢人

大阪大学

大学院理学研究
科〃

Nakagawa Kento

Osaka University

194

ランタノイド Kitaev 型量子スピン液体の探索のための強磁場磁化過程測定

北川

健太郎

東京大学

大学院学院理学 High-Field magnetization meansurement for Lanthanoid
Kitaev-type quantum spin liquid
系研究科

Kentaro Kitagawa

The University of
Tokyo

195

水素終端ダイヤモンド表面の伝導キャリアの強磁場量子振動山口尚秀

国際ナノアーキ
High-field quantum oscillations in hydrogen-terminated
物質・材料研究
テクト二クス研
diamond機構
究拠点

Takahide Yamaguchi

National Institute forMaterials Science

196

トーラス型フェルミ面を持つラシュバ型半導体の量子極限伝導性の研究

村川

寛

大阪大学

大学院理学研究 High field studay for quantum limit transport properties of
torus Fermi surface in Rashba semiconductor科

Hiroshi Murakawa

Osaka university

197

3d-4 ｆ金属間化合物 Er2Fe17 における磁気熱量
効果の直接測定

木原

工

東北大学

金属材料研究所

Direct magnetocaloric effect measurement for 3d-4f
intermetallic compound Er2Fe17

Takumi Kihara

Tohoku University

198 新奇トポロジカル磁性体の開拓

高橋

英史

大阪大学

大学院基礎
工学研究科

Exploring of new topological magnet

Hidefumi Takahashi

Osaka University

199

小野瀬

東京大学

大学院工学系研
究科

Masaho Onoue

The University of
Tokyo

83

担当所員：松田

〃
康弘

雅穂

〃

84

No.
200

課題名

氏名

ISSP Activity Report 2019

近藤半導体 (Yb,R)B12、ほか新規高圧合成物質の伊賀
ワンターンコイル 120T 強磁場磁化と伝導

所属

Title

文俊

茨城大学

理学部

Magnetization and transport properties by using one-turn coilin a 120 T pulse magnet of Kondo insulator (Yb,R)B12 andnovel rare-earth borides producted by high-pressure synthesis

〃

Name

Organization

Fumitoshi Iga

Ibaraki University

Hyouma Takemoriibaraki university

201

〃

竹森

氷馬

茨城大学

理学部

202

遍歴電子強磁性体 Ln2Co12P7 の強磁場磁化過程
の研究

太田

寛人

東京農工大学

大学院工学研究 Magnetic study under high magnetic field on itinerant
ferromagnet Ln2Co12P7
院

Hiroto Ohta

Tokyo Universityof Agriculture andTechnology

担当所員：小濱芳允

203

Bi 系銅酸化物高温超伝導体における量子振動の
観測

渡辺

孝夫

弘前大学

大学院理工学研 Observation of the quantum oscillation in Bi-based high-Tc
superconductors
究科

Takao Watanabe

Hirosaki University

204

〃

藤井

武則

東京大学

低温センター〃Takenori Fujii

University of Tokyo

205

〃

山口

隼平

弘前大学

大学院理工学研
究科〃

Shunpei Yamaguchi

Hirosaki

206

正四角台塔反強磁性体 Pb(TiO)Cu4(PO4)4 におけ木村
る強磁場中での電気磁気光学効果の研究

健太

東京大学

大学院新領域創 Optical magnetoelectric effect of the square-cupola-based
antiferromagnet Pb(TiO)Cu4(PO4)4 in a high magnetic field
成科学研究科

Kenta Kimura

The University of
Tokyo

207

パルス強磁場を用いた強磁場 NMR 測定による量井原
子磁性体の磁場誘起相の研究

慶彦

北海道大学

大学院理学研究 Pulsed field NMR study for field induced magnetic state inquantum magnets
院

Yoshihiko Ihara

Hokkaido university

Koki Arashima

Hokkaido university

208

〃

荒島

洸樹

北海道大学

大学院理学院209

トポロジカル超伝導候補物質における強磁場下
物性測定

芝内

孝禎

東京大学

大学院新領域創 Physical property measurements of topological superconductor
Takasada Shibauchi
candidates under high magnetic field
成科学研究科The University of
Tokyo

210

〃

水上

雄太

東京大学

大学院新領域創成科学研究科〃Yuta Mizukami

The University of
Tokyo

211

〃

竹中

崇了

東京大学

大学院新領域創成科学研究科〃

Takaaki Takenaka

The University of
Tokyo

212

〃

石原

滉大

東京大学

大学院新領域創成科学研究科〃

Kota Ishihara

The University of
Tokyo

213

六方晶近藤格子系 EuSn2As2 単結晶における位
相幾何学的電子相の研究

神原陽一

慶應義塾大学

理工学部

Yoichi Kamihara

Keio University

吉富

大

産業技術総合研 電子光技術研究 Basic research on next generation laser systems and laser
machining technology
究所
部門

Dai Yoshitomi

National Institute ofAdvanced Industrial
Science and Technology

担当所員：小林〃

University

Research on topological electronic phases in a hexagonal
Kondo-lattice, single crystalline EuSn2As2

洋平

214 次世代レーザーとレーザー加工の基礎技術研究

No.

課題名

ISSP Activity Report 2019

氏名

所属

Title

215

〃

高田

英行

産業技術総合研 電子光技術研究
究所
部門

〃

Hideyuki Takada

National Institute ofAdvanced Industrial
Science and Technology

216

〃

佐藤

大輔

産業技術総合研 分析計測標準研
究所
究部門

〃

Daisuke Satoh

National Institute ofAdvanced Industrial
Science and Technology

217

〃

澁谷

達則

産業技術総合研 分析計測標準研
究所
究部門

〃

Tatsunori Shibuya

National Institute ofAdvanced Industrial
Science and Technology

218

次世代レーザーとレーサー加工の基礎技術的研
究

盛合

靖章

産業技術総合研究所

Yasuaki Moriai

National Institute ofAdvanced Industrial
Science and Technology

219

〃

黒田

隆之助

産業技術総合研究所〃

Ryunosuke Kuroda

National Institute ofAdvanced Industrial
Science and Technology

220

〃

鳥塚

健二

産業技術総合研 電子光技術研究
究所
部門

〃

Kenji Torizuka

National Institute ofAdvanced Industrial
Science and Technology

221

青色半導体レーザー用ファイバ型光コンバイナ
の開発

藤本

靖

千葉工業大学

工学部

Development on fiber power combiner for GaN semiconductor
Yasushi Fujimoto
lasersChiba Institute ofTechnology (CIT)

222 短波長パルスレーザーによる炭素繊維の改質

森山

匡洋

東京大学

大学院理学系研究科付属フォトンサ
イエンス研究機構

Laser modification of carbon fiber by short wavelength pusledlaser

Masahiro Moriyama

The University ofTokyo

223 ファイバーレーザーの安定化

大間知

関西学院大学

理工学部

Stabilization of fiber laser

Junko Omachi

Kwansei Gakuin
University

224

〃

松井

芳樹

関西学院大学

理工学部〃

Yoshiki Matsui

Kwansei Gakuin
University

225

〃

美世

将虎

関西学院大学

理工学部〃

Masatora Mise

Kwansei Gakuin
University

226

〃

藤田

滉平

関西学院大学

理工学部〃

Kohei Fujita

Kwansei Gakuin
University

末元

徹

豊田理化学研究
所

Tohru Suemoto

Toyota Physical andChemical ResearchInstitute

227 超高速発光による金属表面の研究
担当所員：原田潤子

先端オペランド計測
技術オープンイノベ
ーションラボラトリ

Basic research on next generation laser systems and laser
machining technology

先端オペランド計測
技術オープンイノベ
ーションラボラトリ

Study on metal surfaces by ultrafast luminescence
spectroscopy

Name

Organization

慈久

85

228

半導体基板上の金属的擬一次元表面状態におけるフェルミ準位近傍のスピン偏極構造

大坪

嘉之

大阪大学

大学院生命機能 Spin texture of the metallic quasi-1D surface states aroundFermi level fabricated on semiconductor substrates
研究科

Yoshiyuki Ohtsubo

Osaka University

229

〃

中村

拓人

大阪大学

大学院理学研究
科〃

Takuto Nakamura

Osaka university

230

〃

徳舛

直樹

大阪大学

大学院理学研究科〃

Tokumasu Naoki

Osaka university

86
ISSP Activity Report 2019

No.

課題名

氏名

231

スピン分解角度分解光電子分光による V2AlC のスピン偏極状態の研究

伊藤

孝寛

232

〃

鍋平

233

トポロジカル絶縁体を用いたスピン軌道トルク
磁気メモリの表面状態解明

所属

Name

Organization

名古屋大学

シンクロトロン Spin- and angle-resolved photoemission study of Spin-polarized
Takahiro Ito
光研究センター electronic structure of V2AlC

Nagoya University

直輝

名古屋大学

大学院工学研究
科

Naoki Nabehira

Nagoya University

小林

正起

東京大学

大学院工学系研 Unveiling the surface state of spin-orbital torque magnetic
memory using topological insulator
究科

Masaki Kobayashi

University of Tokyo

時間分解非線形分光法を用いた希土類酸化物の234 コヒーレントフォノンにおけるソリトン成分の
観測

牧野

哲征

福井大学

学術研究院工学 Soliton contribution in coherent phonons of rare-earth oxides
studied by time-resolved nonlinear spectroscopy
系部門

Takayuki Makino

University of Fukui

235

〃

山出

拓史

福井大学

大学院工学研究
科〃

Takuji Yamade

University of Fukui

236

〃

竹内

智哉

福井大学

大学院工学研究
科〃

Tomoya Takeuchi

University of Fukui

237

〃

浅井

郁帆

福井大学

大学院工学研究
科〃

Takaho Asai

University of Fukui

238

励起子絶縁体 Ta2NiSe5 における光誘起絶縁体 金属転移の研究

久保田Investigation of the photo-induced insulator-to-metal transition
Yuya Kubota
in an exitonic insulatorTa2NiSe5

Japan Synchrotron
Radiation ResearchInstitute (JASRI)

239

T’ 構造をもつ銅酸化物高温超伝導体の角度分解
光電子分光による研究

チャン ウェイ
上智大学
ル

240

時間分解 ARPES による Si(111) 基板上 Cu2Si の高山
電子状態の研究担当所員：板谷

担当所員：岡﨑

Title

〃

治郎

浩三
雄也

あかり

高輝度光科学研 XFEL 利用研究
究センター
推進室

早稲田大学

機能創造理工学 Photoemission spectroscopy of electron-doped T'-cuprate
superconductors
科
先進理工学部Electronic state of Cu2Si on Si(111) studied by time-resolved
ARPES

Zhang Weilu

Sopia University

Akari Tkayama

Waseda University

一般研究員・大阪大学 先端強磁場科学研究センター / General Researcher・Center for Advanced High Magnetic Field Science Osaka University
No.

課題名

担当：萩原

氏名

所属

Title

Name

Organization

政幸（大阪大学）

1

パルス強磁場を用いた強相関電子系物質の強磁場物性の研究

竹内

徹也

大阪大学

低温センター

2

〃

大貫

惇睦

琉球大学

理学部

Magnetic properties of strongly correlated electron systems
under a pulsed high magnetic field〃

Tetsuya Takeuchi

Osaka University

Yoshichika Onuki

University of the
Ryukyus

No.

課題名

氏名

所属

3

クロミック化合物における強磁場磁化過程の粒
径依存性

浅野

貴行

福井大学

学術研究院

4

〃

西首

時夫

福井大学

工学部

5

パルス強磁場によるマルテンサイト変態の時間依存性に関する研究

福田

隆

大阪大学

大学院工学研究 Study on time dependence of martensitic transformation using
Takashi Fukuda
pulsed high magnetic field科

Osaka University

6

CaBa(Ca1-xFex)4O7(x=0,1/2,3/4,1) 単結晶試料の強磁場下での磁化・電気分極・ESR 測定

桑原

英樹

上智大学

理工学部

Magnetization, electric polarization, and ESR measurements
for CaBa(Ca1-xFex)4O7(x=0,1/2,3/4,1) single crystals in pulsed
high magnetic fields

Hideki Kuwahara

Sophia University

7

〃

遠藤

颯

上智大学

理工学部

〃

Hayate Endo

Sophia University

Title

Name

Particle size dependence of high-field magnetization process in
Takayuki Asano
chromic compound〃

Tokio Nishikubi

Organization
University of Fukui
University of Fukui

8

パルス強磁場高圧下 ESR 装置の開発と応用

櫻井

敬博

神戸大学

研究基盤センタ Development of pulsed high magnetic field high pressure ESR
system and its applicationーTakahiro Sakurai

Kobe University

9

フェルダジル系電荷移動塩の強磁場磁性山口博則

大阪府立大学

大学院理学系研 High-field magnetic properties of new verdazyl-based chargetransfer salts
究科

Hironori Yamaguchi

Osaka Prefecture
University

Yoshiki Iwasaki

Osaka Prefecture
University

ISSP Activity Report 2019

10

〃

岩崎

義己

大阪府立大学

大学院理学系研
究科

11

フタロシアニン分子系伝導体で観測される巨大磁気抵抗に対する遷移金属置換の効果

花咲

徳亮

大阪大学

大学院理学研究 Transition-metal-substitution Effect on Giant Magnetoresistance
Noriaki Hanasakiin Phthalocyanine-molecular Conductors
科

Osaka University

12

〃

清水

智可

大阪大学

大学院理学研究
科

Tomoka Shimizu

Osaka University

13

第二種ワイル半金属の強磁場中量子輸送特性の
研究

村川

寛

大阪大学

大学院理学研究 High magnetic fied study on transport properties of type II
Weyl semimetals
科

Hiroshi Murakawa

Osaka university

14

〃

駒田 盛是

大阪大学

大学院理学研究
科〃

Komada Moriyoshi

Osaka university

15

〃

横井

滉平

大阪大学

大学院理学研究
科〃

Yokoi Kohei

Osaka university

16

〃

中岡

優大

大阪大学

大学院理学研究
科〃

Yudai Nakaoka

Osaka university

木村 健太

東京大学

大学院新領域創 High-field ESR measurements of square-cupola-based
antiferromagnets
成科学研究科

Kenta Kimura

The University of
Tokyo

〃

〃

87

17

正四角台塔反強磁性体の強磁場中 ESR 測定

18

Ni2MnGa 系及び Pd2MnSn 系の新規ホイスラー
左近合金の超磁歪の高速磁場応答性の研究

拓男

龍谷大学

理工学部

19

HFESR を用いた配位子場分裂したｆ電子副準位
福田
構造の決定

貴光

大阪大学

大学院理学研究 Determination of f-electronic sublevels arising from ligand fieldTakamitsu Fukuda
splittings by means of HFESR
科

Research on time dependences of magnetstriction of Ni2MnGa
Takuo Sakon
type and Pd2MnSn type Heusler alloys

Ryukoku University
Osaka University

88
ISSP Activity Report 2019

No.

課題名

氏名

20

多孔構造スクアリン酸錯体の合成、構造及び磁性に関する研究21

ディラック電子系磁性体 BaMnX2 (X=Sb, Bi) の酒井
キャント反強磁性における元素置換効果

本多

所属

Title

Name

Organization

善太郎

埼玉大学

大学院理工学研 Synthesis, structure, and magnetic properties of porous metal
squarate complexes
究科

Zentaro Honda

Saitama University

英明

大阪大学

Impact of chemical substitution on the canted
大学院理学研究
antiferromagnetic states for magnetic Dirac materials
科
BaMnX2 (X=Sb, Bi)

Hideaki Sakai

Osaka University

22

〃

近藤

雅起

大阪大学

大学院理学研究科〃

Masaki Kondo

Graduate Schoolof Science Osaka
University

23

〃

中川

賢人

大阪大学

大学院理学研究
科〃

Nakagawa Kento

Osaka University

24

SmB6/SrB6 人工超格子の強磁場中輸送係数測定

宍戸寛明

大阪府立大学

大学院工学研究 Transport measurements for SmB6/SrB6 superlattices underhigh magnetic field科

Hiroaki Shishido

Osaka Prefecture
University

25

タイプ II ラインノード半金属候補物質 Mg3Bi2
及び CaMg2Bi2 の強磁場輸送特性解明

浦田

隆広

名古屋大学

大学院工学研究 High-field magnetotransport properties of type-II nodal-line
semimetal candidates Mg3Bi2 and CaMg2Bi2
科

Takahiro Urata

Nagoya University26

強磁場電子スピン共鳴による有機磁性体の磁場
誘起量子相の解明

細越裕子

大阪府立大学

大学院理学系研 High-field ESR study on the field-induced quantum phases oforganic radical crystals
究科

Yuko Hosokoshi

Osaka Prefecture
University

27

〃

三好

克典

大阪府立大学

大学院理学系研
究科〃

Katsunori Miyoshi

Osaka Prefecture
University

28

〃

瀬戸川

大阪府立大学

大学院理学系研
究科〃

Hiroki Setogawa

Osaka Prefecture
University

東北大学

金属材料研究所 Electric dipole spin resonance of quantum spin systems

Shojiro Kimura

Tohoku University

大阪大谷大学

薬学部

Effect of protein crystallization by the application of horizontal
Syou Maki
magnetic force

Osaka Ohtani
University

High-field ESR and high-field magnetization of two-dimensional
Hirohiko Sato
triangular-lattice antiferromagnet Mn(OH)2

Chuo University

大喜

29

量子スピン系の電場励起 ESR

木村30

水平磁場印加によるタンパク質結晶の磁場効果

牧

31

2 次元三角格子反強磁性体 Mn(OH)2 の強磁場
ESR および強磁場磁化

佐藤

博彦

中央大学

理工学部

32

〃

大寺

翔也

中央大学

大学院理工学研
究科

光田

暁弘

九州大学

33

新しい Eu 化合物の強磁場磁化過程

尚次郎
祥

〃

Shoya Ohtera

Chuo University

大学院理学研究 Magnetization in pulsed magnetic fields of new Eu-based
compounds
院

Akihiro Mitsuda

Kyushu University

Kohei Oyama

Kyushu University

34

〃

大山

耕平

九州大学

理学府

〃

35

三角格子反強磁性体 CsCuCl3 の圧力下強磁場磁
化測定

櫻井

敬博

神戸大学

研究基盤センタ High pressure and high magnetic field magnetization
measurement of triangular antiferromagnet CsCuCl3
ーTakahiro Sakurai

Kobe University36

キラル反強磁性体の強磁場磁化測定

井上

克也

広島大学

大学院理学研究High field magnetic measurements on Chiral Antiferromagnet
科

Katsuya Inoue

Hiroshima University

No.

課題名

氏名

所属

Title

Name

Organization

Title

Name

Organization

物質合成・評価設備 P クラス / Materials Synthesis and Characterization P Class Researcher
No.

課題名

氏名

所属

1

レアメタルフリー磁性材料 L10-FeCo の磁気特
性の解析

小嗣

真人

東京理科大学基礎工学部

2

Bi 系 misfit 単結晶の構造観察

小林

夏野

岡山大学

異分野基礎科学
Observation of local structure on Bi-based misfit single crystal
研究所

Analysis of magnetic properties of rare-metal-free supermagnetKotsugi Masato

Tokyo University of
Science

Kobayashi Kaya

Okayama University

物質合成・評価設備 G クラス / Materials Synthesis and Characterization G Class Researcher
No.

課題名

氏名

所属

1

単結晶 CaMn1-xSbxO3 の熱物性の研究

谷口

晴香

岩手大学

理工学部

2

光ファイバーセンシング技術を利用した泥岩中の化学的浸透現象に伴う岩石の局所的変形の計
測

廣田

翔伍

東京大学

3

新しい希土類金属間化合物の結晶構造の決定

中村

翔太

矢田

達也

ISSP Activity Report 2019

4

〃

5

ナノ構造制御材料を用いた省エネルギーデバイ
ス開発

6

Title
Study of thermophysical properties of single crystalline
CaMn1-xSbxO3

NameOrganization

Haruka Taniguchi

Iwate University

大学院新領域創 Measurement of local deformation of mudstones caused bychemical osmosise with optical ber sensing technique
成科学研究科

Shogo Hirota

The University ofTokyo

名古屋工業大学

大学院物理工学 Decision of crystal structure of new rare-earth intermetallic
compounds科

Nakamura Shota

Nagoya Institute ofTechnology

名古屋工業大学

大学院工学研究科

Yada Tatsuya

Nagoya Institute ofTechnology

〃

89

細野 英司

産業技術総合研 省エネルギー研 Development of devices for energy conservation by using
nanostructure controlled materials
究所
究部門

Eiji Hosono

National Institute ofAdvanced Industrial
Science and Technology〃

太田

産業技術総合研 省エネルギー研
究所
究部門

〃

Michihiro Ohta

National Institute ofAdvanced Industrial
Science and Technology

7

〃

ジュド
ヤンカ

産業技術総合研 省エネルギー研
究所
究部門

〃

Jood Priyanka

National Institute ofAdvanced Industrial
Science and Technology

8

新しい希土類磁石の探求

齋藤Tetsuji Saito

Chiba Institute ofTechnology

9

マイクロミキサを用いた機能性無機ナノ粒子の連続合成

陶Kiwamu Sue

National Institute ofAdvanced Industrial
Science and Technology

10

Nd1-xSrxFeO3 (0.1 ≦ x ≦ 0.9) の高温における磁性と熱電特性に関する研究

中津川

11

準結晶・近似結晶の磁性に関する研究 II

12

層状ロジウム酸化物の磁気相図

道広
プリ

哲治

千葉工業大学

工学部

Research of new rare-earth magnets

産業技術総合研 化学プロセス研 Continuous synthesis of functional inorganic nanoparticles
using a micromxer
究所
究部門

究
博

横浜国立大学

大学院工学研究 Magnetism and thermoelectric properties at high temperature
in Nd1-xSrxFeO3 (0.1 ≦ x ≦ 0.9)
院

Hiroshi Nakatsugawa

Yokohama National
University

鈴木

慎太郎

東京理科大学

基礎工学部

Magnetism of quasicrystal and approximants II

Shintaro Suzuki

Tokyo University of
Science岡崎竜二

東京理科大学

理工学部

Magnetic phase diagram of the layered rhodium oxides

Ryuji Okazaki

Tokyo University of
Science90
ISSP Activity Report 2019

No.

課題名

13

〃

栗田

寛士

東京理科大学

大学院理工学研
究科〃

Kanji Kurita

Tokyo university ofscience

14

〃

石井

まゆ

東京理科大学

大学院理工学研
究科〃

Mayu Ishii

Tokyo University Of
Science

15

〃

坂林

北斗

東京理科大学

大学院理工学研
究科〃

Hokuto Sakabayashi

Tokyo University of
Science香取浩子

東京農工大学

大学院工学研究 Magnetization measurements of polymorphism
M2GeO5(M=V,Cr,Fe)
院

Hiroko Katori

Tokyo Universityof Agriculture andTechnology

16

多形物質 M2GeO5(M=V,Cr,Fe) の磁化測定

氏名

所属

Title

Name

17

〃

柿本

和勇

東京農工大学

大学院工学府〃Kazuo Kakimoto

18

〃

大木

祐明

東京農工大学

大学院工学府〃

Yoshiaki Ohki

スピネル酸化物 GeFe2O4 におけるスピングラス
香取
出現機構の解明浩子

東京農工大学

大学院工学研究 Clarification of the appearance mechanism of spin glass inspinel oxide GeFe2O4
院

Hiroko Katori

寛人

東京農工大学

大学院工学研究院〃

Hiroto Ohta

東京農工大学

工学部〃

Yutaka Kobiki

19

Organization

Tokyo Universityof Agriculture andTechnology
Tokyo Universityof Agriculture andTechnology
Tokyo Universityof Agriculture andTechnology
Tokyo Universityof Agriculture andTechnology
Tokyo Universityof Agliculture andTechnology

20

〃

太田

21

〃

小日置

22

ハーフメタルホイスラー合金の遍歴電子磁性体のスピンゆらぎ理論による解析に関する研究

重田

出

鹿児島大学

大学院理工学研 Study on analysis of half-metallic Heusler alloys by the spin
fluctuation theory for itinerant electron magnetism
究科

Shigeta Iduru

Kagoshima University

23

ホイスラー化合物での反強磁性の研究

廣井

政彦

鹿児島大学

大学院理工学研
Study on antiferromagnetism in Heusler compounds
究科

Masahiko Hiroi

Kagoshima University

Tomohito Nonoyama Kagoshima University

24

〃

隆

野々山

智仁

鹿児島大学

大学院理工学研
究科

岳彦

東京大学

大学院新領域創 in situ measurement of Raman scattering for heterogeneous
catalytic reactions
成科学研究科〃

Takehiko Sasaki

The University ofTokyo

Reflectance measurement of focal plane light concentrators for
Tatsuo Yoshidacosmic-ray telescopes

Ibaragi Univrsity

25

触媒反応の insitu ラマン散乱測定

佐々木

26

宇宙線望遠鏡の焦点面ライトガイドの反射率測
定

吉田

龍生

茨城大学

理学部

27

酸水素化物 SmHO における圧力誘起秩序無秩序
山本
相転移

隆文

東京工業大学

フロンティア材
Pressure-induced order/disorder transition in SmHO
用研究所

Takafumi Yamamoto Kyoto University

28

ピストンシリンダーを用いた高温高圧下における有機化合物の重合反応の解明

篠崎

彩子

北海道大学

大学院理学研究 Effect on pressure and temperature on the oligomerization
organic compounds
院

Ayako Shiozaki

Hokkaido University

29

複数種の元素を充填した新規スクッテルダイト型熱電材料の高圧合成

関根

ちひろ

室蘭工業大学

大学院工学研究 High-pressure synthesis of new multifilled skutterudite-type
thermoelectric materials
科

Chihiro Sekine

Muroran Institute ofTechnology

No.

課題名

氏名

所属

30

〃

佐藤

雄也

室蘭工業大学

大学院工学研究科31

高温高圧下における下部マントル鉱物への窒素の取り込みに関する研究

福山

鴻

東京大学

32

高圧下におけるアミノ酸のペプチド化反応の観
察

藤本

千賀子

33

超高圧における窒素源前駆体の分解反応を利用した遷移金属窒化物の合成

丹羽

34

〃

35

Title

Name

Organization

ISSP Activity Report 2019

Yuya Sato

Muroran Institute ofTechnology

大学院理学系研 The study on nitrogen incorporation into the lower-mantle
minerals under high pressure and high temperature
究科

Ko Fukuyama

The University of
Tokyo

東京大学

大学院理学系研
Pressure-induced reaction of amino acids under high pressure
究科

Chikako Fujimoto

The University of
Tokyo

健

名古屋大学

大学院工学研究 High pressure synthesis of transition metal nitrides via
decomposition of nitrogen source precursor
科

Ken Niwa

Nagoya University

生駒

鷹秀

名古屋大学

大学院工学研究
科

Takahide Ikoma

Nagoya University

層状酸化物の超高圧合成と結晶化学および物性

丹羽

健

名古屋大学

大学院工学研究 High pressure synthesis, crystal chemistry and physicalproperties of layered oxides
科

Ken Niwa

Nagoya University

36

〃

高野

航一

名古屋大学

工学部

Koichi Takano

Nagoya University

37

超高圧力合成法を用いた高窒素分圧下での窒化物蛍光体の合成

佐々木

名古屋大学

大学院工学研究 High-pressure synthesis of nitride phosphors under highnitrogen partial pressure
科

Takuya Sasaki

Nagoya University

38

〃

近藤

名古屋大学

工学部

Shinsuke Kondo

Nagoya University

39

超高圧力合成法を用いたジルコニウム含有水素
化物の創成

佐々木

名古屋大学

大学院工学研究 High-pressure synthesis and crystal structure of novel
zirconium-containing hydrides
科

Takuya Sasaki

Nagoya University

40

〃

市川

名古屋大学

大学院工学研究
科

Masanari Ichikawa

Nagoya University

拓也
信介
拓也
将成

〃

〃

〃

〃

〃

41

尿素経路を用いた新規金属窒化物の高圧合成

ニコ アレキサ名古屋大学
ンダー ガイダベンチャー・ビHigh-pressure synthesis of novel transition metal nitrides using Nico Alexander
ジネス・ラボラ
the urea approach
Gaida
トリー

Nagoya University

42

ぺロブスカイト関連化合物の高圧合成

稲熊

宜之

学習院大学

理学部

Yoshiyuki Inaguma

Gakushuin University

紘一郎

学習院大学

理学部

〃

Koichiro Ueda

Gakushuin University

学習院大学

大学院自然科学研究科〃

Hiromu Mori

Gakushuin University

High-pressure synthesis of perovskite-related compounds

91

43

〃

植田

44

〃

森

45

異相接合界面のバンド構造の解明と SOFC セル
への応用

大友

順一郎

東京大学

大学院新領域創 Elucidation of band diagram of hetero junction and application
Junichiro Otomo
to SOFCs
成科学研究科The University of
Tokyo

46

〃

那須

雄太

東京大学

大学院新領域創成科学研究科The University of
Tokyo

紘夢

〃

Yuta Nasu

92
ISSP Activity Report 2019

No.

課題名

氏名

所属

47

エネルギー貯蔵型燃料電池の電極活物質の開発

大友

順一郎

東京大学

大学院新領域創 Development of electrode materials of energy storage type ‐fuel cells
成科学研究科

Junichiro Otomo

The University of
Tokyo

48

〃

中西

泰介

東京大学

大学院新領域創成科学研究科

Taisuke Nakanishi

The University of
Tokyo

49

カルシウムルーピング法における二酸化炭素利用技術の開発

大友

順一郎

東京大学

大学院新領域創
Development of CO2 utilization with calcium looping method
成科学研究科

Junichiro Otomo

The University of
Tokyo

50

〃

七瀬

浩希

東京大学

大学院新領域創成科学研究科

Nanase Koki

The University of
Tokyo

51

アンモニア電解合成における選択性向上の検討

大友

順一郎

東京大学

大学院新領域創Study on promotion of selectivity in ammonia electrosynthesis Junichiro Otomo
成科学研究科The University of
Tokyo

52

〃

山本

和範

東京大学

大学院新領域創成科学研究科Kazunori Yamamoto

The University of
Tokyo

53

熱化学サイクル型水素生成システムにおける高活性酸素キャリア複合粒子の開発

大友

順一郎

東京大学

大学院新領域創 Development of carrier materials and system design forchemical looping hydrogen production systems
成科学研究科

Junichiro Otomo

The University of
Tokyo

54

〃

甚野

幸一

東京大学

工学部

Koichi Jinno

The University of
Tokyo

55

プロトン伝導性固体電解質薄膜を用いた低温作
動燃料電池・電解合成セルの開発

大友

順一郎

東京大学

Development of low-temperature solid oxide fuel cells and
大学院新領域創electrolysis cells using proton-conducting solid electrolyte thin Junichiro Otomo
成科学研究科films

The University of
Tokyo

56

〃

松尾

拓紀

東京大学

大学院新領域創成科学研究科The University of
Tokyo

57

輸送現象の解明と燃料電池性能向上に向けたプ
ロトン導電性固体電解質の合成

大友

順一郎

東京大学

58

〃

オルティスコ
ラレスフリアンアンドレス

Preparation of proton-conducting solid electrolytes for
大学院新領域創determination of charged-defect transport and improvement of Junichiro Otomo
成科学研究科
solid oxide fuel cells.

東京大学

大学院新領域創成科学研究科59

ケミカルループ法を用いた合成ガス製造システ
ムの設計およびキャリア開発

大友

順一郎

東京大学

大学院新領域創 Development of carrier materials and system design forchemical looping syngas production systems
成科学研究科

Junichiro Otomo

The University of
Tokyo

60

〃

引間

脩

東京大学

大学院新領域創成科学研究科Shu Hikima

The University of
Tokyo

61

イオンー電子混合伝導体の異相界面の作製と輸送現象の解明

大友

順一郎

東京大学

大学院新領域創 Formation of heterojunction of mixed ionic electronic
conductors and clarification of its transport phenomena
成科学研究科

Junichiro Otomo

The University of
Tokyo

62

〃

福田

一峻

東京大学

工学部

Fukuda Kazutaka

The university of
Tokyo

63

プロトン伝導型固体酸化物燃料電池用新規メタ
ルサポートセルデザインの開発

大友

順一郎

東京大学

大学院新領域創
Development of new metal supported cell design for PCFCs
成科学研究科

Junichiro Otomo

The University of
Tokyo

Title

〃

〃

〃

〃

〃

〃

〃

〃

Name

Hiroki Matsuo

Organization

The University ofTokyo

Ortiz Corrales Julian The University ofAndres
Tokyo

No.

課題名

氏名

64

〃

阪田

一真

東京大学

大学院新領域創成科学研究科65

プロトン伝導性固体酸化物を用いたアンモニア
電解合成機構の解明

大友

順一郎

東京大学

66

〃

李

67

カルシウムループ法による合成ガスプロセスの
開発

大友

68

〃

李

建毅
順一郎
智漢

所属

Title

Name

Organization

Kazuma Sakata

The University ofTokyo

大学院新領域創 The Mechanisms of Ammonia Electrosynthesis using protonconducting solid oxide fuel cell
成科学研究科

Junichiro Otomo

The University of
Tokyo

東京大学

大学院新領域創成科学研究科

Chien-I Li

The University of
Tokyo

東京大学

大学院新領域創
Development of Ca looping process for production of syngas
成科学研究科

Junichiro Otomo

The University of
Tokyo

東京大学

大学院新領域創成科学研究科

Jihan LeeThe University of
Tokyo

東京大学

大学院新領域創 Characterization of metal catalysts loaded on mesoporous
materials and graphene oxide
成科学研究科

Takehiko Sasaki

The University of
Tokyo

東京大学

環境安全研究セ Study on supercritical water synthesis of Ni-Fe composite
oxide nanoparticles
ンター

Teppei Nunoura

The University of
Tokyo

東京大学

大学院新領域創成科学研究科

Zhou Xiaoyun

The University of
Tokyo

〃

〃

〃

ISSP Activity Report 201969

メソポーラスマテリアル・グラフェンオキサイド佐々木に担持した金属触媒のキャラクタリゼーション

70

超臨界水中でのニッケル鉄複合酸化物ナノ粒子
合成に関する研究

布浦

71

〃

周

72

バリウムフェライトの磁気異方性と元素置換効
果

植田

浩明

京都大学

大学院理学研究
Magnetic anisotropy and substitution effect of barium ferrites
科

Hiroaki Ueda

Kyoto university

73

〃

奥津

陽太

京都大学

理学部

Yota Okutsu

Kyoto University74

超臨界メタノール条件下でのエステル交換反応に固体触媒が与える影響

秋月

信

東京大学

大学院新領域創 The effect of solid catalysts on the ester exchange reaction insupercritical methanol
成科学研究科

Makoto Akizuki

The University of
Tokyo

75

〃

張

瑞子

東京大学

大学院新領域創成科学研究科

Zhang Ruizi

The University of
Tokyo

信

東京大学

大学院新領域創 Investigation of the effect of hot compressed methanol-water
mixed solvent on solid catalyzed reactions
成科学研究科

Makoto Akizuki

The University of
Tokyo

76

岳彦
鉄兵

高温高圧条件下の水 - メタノール溶媒が固体触媒
秋月反応に及ぼす影響

暁雲

〃

〃

〃

93

77

〃

島田

綾子

東京大学

工学部

Ayako Shimada

The University of
Tokyo

78

高温高圧水―アルコール混合溶媒が金属酸化物
ナノ粒子の合成に与える影響の解明

大島

義人

東京大学

大学院新領域創 Research on the effect of water-alcohol mixture on metal oxide
Yoshito Oshima
nanoparticle synthesis
成科学研究科The University of
Tokyo

79

〃

劉

東京大学

大学院新領域創成科学研究科Yuan Liu

The University of
Tokyo

80

高温高圧水中でのバイオマス変換に使用するマイクロポーラス材料

大島

東京大学

大学院新領域創 Microporous material for biomass upgrading in sub- andsupercritical water
成科学研究科Yoshito Oshima

The University of
Tokyo

源
義人

〃

〃

94
ISSP Activity Report 2019

No.

課題名

氏名

81

〃

アピバンボリラク チャンウィット

82

超臨界水を利用した ZnO ナノ粒子の合成とその
大島
形態制御

所属

Title

Name

Organization〃

Apibanboriak
Chanwit

The University of
Tokyo

東京大学

大学院新領域創成科学研究科義人

東京大学

大学院新領域創 Synthesis and morphology control of zinc oxide nanoparticles
using supercritical water
成科学研究科Yoshito Oshima

The University ofTokyo

Yasuhiko Orita

The University of
Tokyo

83

〃

織田

耕彦

東京大学

大学院新領域創成科学研究科84

ブリージングパイロクロア磁性体の熱膨張と磁
歪

岡本

佳比古

名古屋大学

大学院工学研究 Thermal expansion and magnetostriction of breathing
pyrochlore magnets
科

Yoshihiko Okamoto

Nagoya University

85

高温高圧下で多軽元素が鉄ー含水ケイ酸塩系に及ぼす影響の解明

飯塚

理子

東京大学

大学院理学系研 Behavior of multi light elements in iron-silicate-water system
under high pressure and high temperature
究科

Riko Iizuka

The University of
Tokyo

86

高圧下での MoSi2 型構造の FeAl2 結晶の作製

木村

薫

東京大学

大学院新領域創 High pressure synthesis of MoSi2 type iron aluminide,
FeAl2 crystal
成科学研究科

Kaoru Kimjura

The University ofTokyo

Kazuki Tobita

The University of
Tokyo

〃

87

〃

飛田

一樹

東京大学

大学院新領域創成科学研究科88

希土類オルソフェライト単結晶成長とテラヘル
ツスピン分光

中嶋

誠

大阪大学

レーザー科学研 Single crystal growth for rare-earth orthoferrite and terahertz
spin spectroscopy
究所

Makoto Nakajima

Osaka University

89

〃

加藤

康作

大阪大学

レーザー科学研究所〃

Kosaku Kato

Osaka University

90

〃

木本

翔大

大阪大学

レーザー科学研究所〃

Shodai Kimoto

Osaka University

91

〃

上田

誠一郎

大阪大学

レーザー科学研究所〃

Seiichiro Ueda

Osaka University

92

〃

小池

遥平

大阪大学

レーザー科学研究所〃

Yohei Koike

Osaka University

93

マルチフェロイック物質における非自明な電子物性の探求に関する研究

木村

剛

東京大学

大学院新領域創 Exploration of nontrivial electronic properties in multiferroic
materials
成科学研究科Tsuyoshi Kimjura

The University of
Tokyo

94

〃

木村

健太

東京大学

大学院新領域創成科学研究科〃

Kenta Kimura

The University of
Tokyo

95

〃

三澤

龍介

東京大学

大学院新領域創成科学研究科〃

Ryusuke Misawa

The University of
Tokyo

96

〃

勝吉

司

東京大学

大学院新領域創成科学研究科〃

Tsukasa Katsuyoshi

The University of
Tokyo

97

〃

林田

健志

東京大学

大学院新領域創成科学研究科〃

Takeshi Hayashida

The University of
Tokyo

〃

No.

課題名

98

〃

99

新奇超伝導体の物質合成と物性評価

氏名

所属

八木

直輝

東京大学

大学院新領域創成科学研究科

水上

雄太

東京大学

Title

Name

Organization

Naoki Yagi

The University ofTokyo

大学院新領域創 Synthesis and physical property measurements of novel
superconductors
成科学研究科Yuta Mizukami

The University of
Tokyo

〃

ISSP Activity Report 2019

95

100

〃

竹中

崇了

東京大学

大学院新領域創成科学研究科〃

Takaaki Takenaka

The University of
Tokyo

101

〃

石田

浩祐

東京大学

大学院新領域創成科学研究科〃

Kousuke Ishida

The University of
Tokyo

102

〃

田中

桜平

東京大学

大学院新領域創成科学研究科〃

Ohei Tanaka

The University of
Tokyo

103

〃

辻井

優哉

東京大学

大学院新領域創成科学研究科〃

Masaya Tsujii

The University of
Tokyo

104

〃

石原

滉大

東京大学

大学院新領域創成科学研究科〃

Kota Ishihara

The University ofTokyo

105 空間反転対称性を持たない新規磁性体の開発

有馬

孝尚

東京大学

大学院新領域創
Exploration of new noncentrosymmetric magnets
成科学研究科Taka-hisa Arima

The University of
Tokyo

106

〃

徳永

祐介

東京大学

大学院新領域創成科学研究科〃

Yusuke Tokunaga

The University of
Tokyo

107

〃

阿部

伸行

東京大学

大学院新領域創成科学研究科〃Nobuyuki Abe

The University of
Tokyo

108

〃

鷲見 浩樹

東京大学

大学院新領域創成科学研究科〃

Hiroki Sumi

The University of
Tokyo

109

〃

藤間

友理

東京大学

大学院新領域創成科学研究科〃Yuri Fujima

The University of
Tokyo

110

〃

近江

毅志

東京大学

大学院新領域創成科学研究科〃Tsuyoshi Omi

The University of
Tokyo

111

〃

荒木

勇介

東京大学

大学院新領域創成科学研究科〃

Yusuke Araki

The University of
Tokyo

112

〃

蘇

東京大学

大学院新領域創成科学研究科〃Dan SuThe University of
Tokyo

113

〃

渡辺

義人

東京大学

大学院新領域創成科学研究科〃Yoshito Watanabe

The University of
Tokyo

114

〃

尾亦

恭輔

東京大学

大学院新領域創成科学研究科〃Kyosuke Omata

The University of
Tokyo

丹

96
ISSP Activity Report 2019

No.

課題名

115

〃

西

116

〃

山本

117

バナジウムカルコゲナイドにおける Valence
Bond 短距離秩序状態の研究

氏名

所属

Title

Name

Organization

東京大学

大学院新領域創成科学研究科〃

Kenta Nishi

The University of
Tokyo

圭祐

東京大学

大学院新領域創成科学研究科〃

Keisuke Yamamoto

The University of
Tokyo

片山

尚幸

名古屋大学

大学院工学研究 Study of Short-Ranged Valence Bond formation in vanadiumchalcogenides
科

Naoyuki Katayama

Nagoya University

Keita Kojima

Nagoya University

健太

118

〃

小島

慶太

名古屋大学

工学部

119

バナジウムカルコゲナイドにおけるスピン軌道
複合秩序状態

片山

尚幸

名古屋大学

大学院工学研究 Spin-Orbital entangled ordered state in vanadiumchalcogenides
科

Naoyuki Katayama

Nagoya University

120

〃

前田

秦

名古屋大学

大学院工学研究科

Shin Maeda

Nagoya University〃〃

物質合成・評価設備 U クラス / Materials Synthesis and Characterization U Class Researcher
No.

課題名

氏名

1

プラズマ風洞による宇宙往還機熱防護システムの動的酸化に関する研究

桃沢愛

東京都市大学

工学部医用工学 Investigation on dynamic oxidation of thermal protection
system using plasma wind tunnel
科

Ai Momozawa

Tokyo City University

2

〃

田中

聖也

東京大学

大学院工学系研
究科〃

Seiya Tanaka

The University of
Tokyo

3

〃

山田

慎

東京大学

大学院工学系研
究科〃

Shin Yamada

The University of
Tokyo

4

オレイン酸の超臨界水ガス化工程におけるニッ
ケル触媒の非活性化メカニズムの解明

布浦

鉄兵

東京大学

環境安全センタ Nickel catalyst deactivation in supercritical water gasificationof oleic acidー

Teppei Nunoura

The University of
Tokyo

5

〃

東京大学

大学院新領域創成科学研究科

Diane Gubatanga

The University of
Tokyo

6

積層型燃料電池の輸送特性制御と電解合成への
応用

大友

順一郎

東京大学

Development of new electrochemical catalyst for ammonia
大学院新領域創electrolysis and evaluation of reaction mechanism at
成科学研究科intermediate temperature

Junichi Otomo

The University of
Tokyo

7

〃

田島

星也

東京大学

大学院新領域創成科学研究科

Seiya Tajima

The University of
Tokyo

8

中温域でのアンモニア電解合成における新規電極触媒開発及び反応機構解明

大友

順一郎

東京大学

大学院新領域創 Control of transport properties of stracked fuel cells and its
application to electrochemical synthesis
成科学研究科

Junichi Otomo

The University of
Tokyo

9

〃

今田

佳那

東京大学

大学院新領域創成科学研究科

Kana Imata

The University of
Tokyo

ダイアン
バタンガ

所属

グ

Title

〃

〃

〃

Name

Organization

No.

課題名

氏名

所属

10

静電浮遊法を用いた過冷却液体急冷法によるボロン系準結晶の探索

木村

薫

東京大学

11

〃

高橋

昂広

東京大学

12

特異な形態を有するセラミック膜の加工と界面
構造解析

小松

啓志

長岡技術科学大 物質材料工学専 Microfabricated TEM sections of oxide film with uniquemorphology
学
攻

Title

Name

Organization

大学院新領域創 Search for quasicrystalline boron using rapid quenching fromsuper-cooled liquid by levitation technique
成科学研究科

Kaoru Kimura

The University ofTokyo

大学院新領域創成科学研究科Takahiro Takahashi

The University ofTokyo

Keiji Komatsu

Nagaoka University ofTechnology〃

長期留学研究員 / Long Term Young Researcher
No.

課題名

氏名

所属

1

有機半導体の分子吸着に伴って生じるトポロジ
カル表面状態の変化

北澤辰也

東京理科大学

大学院理工学研 Modification of Topological surface states upon adsorption oforganic semiconductors
究科

2

PdPc の表面吸着によって生じる Cu(111) ショッ
下澤
クレー状態の変化

皐介

東京理科大学

理工学部

Title

Name
Tatsuya Kitazawa

Modification of Cu(111)Shockley stateupon adsorption of PdPc Kosuke Shimozawa

Organization
Tokyo University of
ScienceTokyo University of
Science

ISSP Activity Report 2019

97

98

令和元年度 共同利用課題一覧（後期）/ Joint Research List (2019 Latter Term)

ISSP Activity Report 2019

嘱託研究員 / Commission Researcher
No.

課題名

担当所員：長谷川

氏名所属

Organization

東北大学

大学院理学研究 Development of low-temperature scanning tunnelingpotentiometry科

Toyoaki Eguchi

Tohoku University

博文

東北大学

材料科学高等研 Development of fabrication and treatment methods for spinpolarized tips
究所

Hirofumi Oka

Tohoku University

東秀

北陸先端科学技 先端科学技術研 Development of local ferromagnetic resonance in scanningtunneling microscopy
術大学院大学
究科

Toshu AnJapan Advanced
Institute of Scienceand Technology

Low-temperature STM study on iron-chalcogenide super
conductor FeSeTe

Yasuo Yoshida

Kanazawa University

Development of Film Deposition Systems for High-throughput
Material Exploration

Ryota Takahashi

Nihon University

低温走査トンネルポテンショメトリーの開発

江口

2

スピン偏極探針の作製・処理方法の開発

岡3

走査トンネル顕微鏡による局所強磁性共鳴法の
開発

安

4

極低温走査トンネル顕微鏡を用いた鉄カルコゲ
ナイド超伝導体 FeSeTe の研究

吉田

靖雄

金沢大学

理工学域

Materials Foundry のための材料開発システム構
高橋
築に向けた薄膜合成装置の開発

竜太

日本大学

工学部

担当所員：リップマー

担当所員：上床

Name

幸雄

1

5

Title

豊明

ミック

美也

6

磁性体の圧力効果

巨海

玄道

久留米工業大学

Effect of pressure on the Magnetic Materials

Oomi Gendo

Kurume Institute ofTechnology

7

高圧下 X 線回折法の開発

江藤

徹二郎

久留米工業大学

Development of High Pressure X-ray diffraction measurements Tetsujiro Eto

Kurume Institute ofTechnology

8

多重極限関連圧力装置の調整

高橋

博樹

日本大学

文理学部

Adjustment of Cubic Anvil apparatus

Hiroki Takahashi

Nihon University

9

3 ｄ遷移化合物に関する圧力効果

鹿又武

東北学院大学

工学総合研究所 Effect of pressure on the 3d transition compounds

Takahashi Kanomata

Tohoku Gakuin
University10

酸化物試料の作製と高圧下物性測定

川中浩史

産業技術総合研 電子光技術研究
Sample preparetion and high pressure experiments
究所部門

Hirofumi Kawanaka

National Institute ofAdvanced Industorial
Scuence and Technorogy

11

有機伝導体の圧力効果

村田惠三

大阪経済法科大学

Effect of pressure on the organic conductor

Keizo Murata

Osaka University of
economice and low

12

希土類 122 化合物における圧力効果

繁岡

透

山口大学

大学院理工学研
Pressure effect of rare earth 122compounds
究科

Toru Shigeoka

Yamaguchi University

No.

課題名

氏名

所属

Title

Name

Organization

13

低温用マルチアンビル装置の開発

辺土

正人

琉球大学

理学部

Development of multi-anvil apparatus for low temperature

Masato Hedo

University of Ryukyu

14

カンチレバーを用いたトルク測定法の開発

鳥塚潔

日本工業大学

共通教育学群

Development of torque measurement method

Kiyoshi Torizuka

Nippon Institute oftechnology

15高圧下量子振動観測システムの開発

摂待

力生

新潟大学

理学部

Development of quantum oscillation under high pressure

Rikio Settai

Niigata University

16

希釈冷凍機温度で使用可能な 10GPa 級超高圧発
松林生装置の開発和幸

電気通信大学

Development of 10GPa class high pressure apparatus for low
temperature

KazuyukiMatsubayashi

The University
of ElectroCommunications

17

DAC を用いた物性測定方法の開発

狩野みか

日本工業大学

Development of physical property measurement method using
Mika Kano
DAC

Nippon Institute oftechnology

18

擬一次元有機物質の圧力下物性研究

糸井

充穂

日本大学

医学部

Study on pressure induced superconductivity of quasi organic
conductor

Miho Itoi

Nihon University

19

圧力下 NMR 測定法に関する開発

藤原

直樹

京都大学

大学院人間・環 Development of NMR measurement method under highpressure
境学研究科

Naoki Fujiwarra

Kyoto University

大阪大学

産業科学研究所

Construction of a noble system for circularr and linear
dichroism in soft X-ray emission and RIXS spectroscopy

Shigemasa Suga

Osaka University

担当所員：原田慈久

ISSP Activity Report 201920

軟 X 線発光・共鳴非弾性散乱分光の磁気円・線二色性測定システムの構築

菅21

軟 X 線吸収 / 発光分光法によるリチウムイオン
電池電極材料の電子物性研究

細野英司

産業技術総合研 省エネルギー研 Study on the electronic property of electrode materials for Liion batteries by soft X-ray absorption /emission spectroscopy
究所
究部門

Eiji Hosono

AIST

22

〃

朝倉

大輔

産業技術総合研 省エネルギー研
究所
究部門

Disuke Asakura

AIST

23

高分解能光電子分光による酸化バナジウムの研
究

藤原

秀紀

大阪大学

大学院基礎工学
Study on vanadium oxides by high resolution Photoemission
研究科

Hidenori Fujiwara

Osaka University

24

省エネ・創エネ・蓄電デバイスのオペランド分
光

尾嶋

正治

東京大学

大学院工学系研 Operando nano-spectroscopy for energy efficient,power,generation and energy storage devices
究科

Masaharu Oshima

The University of
Tokyo

25

原子レベルで制御されたモデル有機分子表面上の界面水の電子状態観測

林

東京工業大学

大学院総合理工 Analysis of the electronic structure of interfacial water formed
Tomohiro Hayashi
on model organic surfaces
学研究科

Tokyo Institute ofTechnology

26

三次元 nanoESCA による実デバイスのオペラン
永村
ド電子状態解析直佳

物質・材料研究機構

Operando analysis of the electronic structure of actual devices
Naoka Nagamura
by 3Dnano ESCA

National Institute ofMaterial Science27

時間分解光電子顕微分光実験の技術開発

豊彦

高輝度光科学研究センター

Technical development of time-resolved photoemission
microscopy measurement

Japan Advanced
Institute of Scienceand Technology

99

担当所員：松田

巌

滋正

木下

智広

〃

Toyohiko Kinoshita

100

No.

課題名

氏名

所属

Title

Name

Organization

ISSP Activity Report 201928

スピン分解光電子分光の測定技術開発

木村

真一

大阪大学

大学院生命機能 Technical development of spin-resolved photoemmision
spectroscopy measurement
研究科

Shinichi Kimura

Osaka University29

時間分解磁気光学実験の技術開発

小嗣真人

東京理科大学

基礎工学部

Technical development of time-resolved magneto-opticalexperiment

Masato Kotsugi

Tokyo University of
Science30

超高速磁化応答による磁性波動関数の制御

小林

正起

東京大学

大学院工学系研 Regulation of magnetic wave functions by ultrafast
magnetization response
究科

Masaki Kobayashi

The University of
Tokyo

31

コヒーレント共鳴軟 X 線散乱による磁気ドメイン構造の観測山崎裕一

統合型材料開Observation of magnetic domain structure for ferromagnetic
物質・材料研究
発・情報基盤部
thin films by means of resonant soft x-ray scattering
機構
門

Yuichi Yamasaki

National Institute forMaterials Science32

遷移金属化合物の時間分解 X 線分光と回析

和達大樹

兵庫県立大学

大学院物質理学 Time-resolved x-ray spectroscopy and diffraction of transitionHiroki Wadachi
metal-compounds
研究科

University of Hyogo

担当所員：近藤猛

33

光電子分光法を用いた各種分子性結晶の電子状態の研究及び装置の低温化

木須

孝幸

大阪大学

大学院基礎工学 Research on electron state of molecular crystals using
photoemission spectroscopy
研究科

Takayuki Kisu

Osaka University

34

高分解能光電子分光による強相関物質の研究

横谷

尚睦

岡山大学

異分野基礎科学
Ultra-high resolution study on strongly correlated materials
研究所

Takayoshi Yokoya

Okayama University

35

60-eV
開発

石坂

香子

東京大学

大学院工学系研 The development of time -resolved photoemission using 60eV
laser
究科

Kyoko Ishizaka

The University of
Tokyo

36

トポロジカル超伝導体の探索

坂野

昌人

東京大学

大学院工学系研Search for topological insulators
究科

Masato Sakano

The University of
Tokyo

37

有機化合物の光電子分光

金井要

東京理科大学

理工学部

Kaname Kanai

Tokyo University of
Science38

トポロジカル絶縁体の電子状態の解明

木村

昭夫

広島大学

大学院理学研究
Electronic-structure study of topological insulators
科

Akio Kimura

Hiroshima University39

Si(111) 上単層タリウムの高次高調波を用いた時
坂本
間分解光電子分光一之

大阪大学

大学院工学研究 Time-resolved ARPES investigation of monolayer Thallium on
Si(111)科

Kazuyuki Sakamoto

Osaka University

レーザーを用いた時間分解光電子分光の担当所員：岡﨑

Photoemission study on organic compounds

浩三

40

レーザー励起光電子顕微鏡を使った抵抗変化メ
モリ材料の研究木下健太郎

東京理科大学

理学部

Study on Materials for Resistive Switching Memories using
laser-PEEM

Kentaro Kinoshita

Tokyo University of
Science41

収差補正型光電子顕微鏡の建設と利用研究

小嗣真人

東京理科大学

基礎工学部

Construction and utilization research of aberration correction
photoelectron emission microscopy

Masato Kotsugi

Tokyo University of
Science42

時間分解光電子分光を用いた強相関物質の研究

溝川

貴司

早稲田大学

理工学術院

Time-resolved photoemission study on strongly-correlatedmaterials

Takashi Mizokawa

Waseda University

No.

課題名

43

固体中のマヨラナ粒子の研究

氏名

所属

Title

Name

Organization

松田

祐司

京都大学

大学院理学研究 Study of Majorana Femion in Solids by Laser Photoemission
Spectroscopy
科

Yuji Matsuda

Kyoto University

Masatoshi Sato

Kyoto University

44

〃

佐藤

昌利

京都大学

基礎物理学研究所

45

FeSe 超伝導体における BCS-BES クロスオーバ
ーの研究

紺谷

浩

名古屋大学

大学院理学研究
Study of BCE-BES crossover in FeSe superconductors
科

Hiroshi Kontani

Nagoya University

46

時間分解光電子分光や超高分解能光電子分光を用いた超伝導体や強相関物質の研究

吉田

鉄平

京都大学

総合人間学部

Laser ARPPES study on superconductors and stronglycorrelated materials

Teppei Yoshida

Kyoto University

47

超高分解能レーザー光電子分光による高温超伝
導体の研究

チャン
イル

ウェ

上智大学

機能創造理工学 Study of high-Tc superconductors by high-resolution laser
ARPES
科

Weilu Zhang

Sophia University

48

鉄系超伝導体のレーザー光電子顕微鏡

下志万

貴博

理化学研究所

創発物性科学研
Laser-PEEM on iron-based superconductor
究センター

Takahiro Shimojima

RIKEN

〃

一般研究員 / General Researcher
No.

課題名

担当所員：瀧川
1

所属

Title

Name

Organization

仁

三角スピン系有機ラジカルの核磁気共鳴による磁気誘電現象の解明

ISSP Activity Report 2019

担当所員：榊原

氏名

細越

裕子

大阪府立大学

大学院理学系研 NMR study on the magnetodielectric properties of organic
triangular spin model compound
究科

Yuko Hosokoshi

Osaka Prefecture
University

Kazushige Machida

Ritsumeikan
University

俊郎

2

重い電子系超伝導体の対称性の決定

町田

一成

立命館大学

理工学部

Determination of pairing symmetry for heavy Fermion
superconductors

3

量子スピンアイス物質における量子モノポールの実験的検出

町田

洋

学習院大学

理学部

Experimental detection of quantum monopole in quantum spin
Yo Machida
ice systems

4重い電子系化合物における量子臨界現象

横山

淳

茨城大学

大学院理工学研
Quantum critical behavior in heavy-fermion compounds
究科

Makoto Yokoyama

Ibaraki University

ラフマント

茨城大学

大学院理工学研
究科

Rahmanto

Ibaraki University

Gakushuin University

101

5

〃

6

有機ラジカルから成る新規量子スピン系の低温
物性測定

山口

博則

大阪府立大学

大学院理学系研 Low temperature physical properties of quantum spin systems
composed of organic radical
究科

Hironori Yamaguchi

Osaka Prefecture
University

7

〃

上本

菜央

大阪府立大学

大学院理学系研
究科

Nao Uemoto

Osaka Prefecture
University

〃

〃

102
ISSP Activity Report 2019

No.

課題名

氏名

8

無機―有機ハイブリッド磁性体により実現する
低次元量子スピン系の極低温物性測定河野洋平

大阪府立大学

大学院理学系研 Low temperature physical properties of low-dimensional
quantum spin systems in metal--verdazyl complexes
究科

Yohei Kono

Osaka Prefecture
University

9

Ba2+-Fe3+-Ti4+-Me2+ 酸化物磁性体の磁場中誘電
神島
特性

謙二

埼玉大学

大学院理工学研 Dielectric properties of Ba2+-Fe3+-Ti4+-Me2+ magnetic oxides
under magnetic field
究科

Kenji Kamishima

Saitama University

直生

埼玉大学

大学院理工学研
究科〃

Naoki Yasuda

Saitama University

埼玉大学

大学院理工学研
究科〃

Haruki Kan

Saitama University

埼玉大学

大学院理工学研
究科〃

Hisayoshi Takahashi Saitama University

青山学院大学

理工学部

10

〃

安田

11

〃

神

12

〃

高橋

13

トポロジカル超伝導のネマチック相研究

14

〃

治樹

孫

久由
悦

所属

宮沢

貴麿

青山学院大学

理工学部

Title

Study of the nematic phase of topological superconductors〃

Name

Organization

Yue SunAoyama Gakuin
University

Miyazawa Takahiro

Aoyama Gakuin
University

15

遍歴電子反強磁性体の磁化・比熱測定

加瀬直樹

東京理科大学

理学部応用物理 Magnetization and specific heat measurements of the itinerant
Kase Naoki
electron materials
学科

Tokyo University of
Science16

新奇ウラン系奇パリティ超伝導における磁化・比清水
熱・熱膨張測定悠晴

東北大学

Novel odd-parity uranium superconductors studied by
金属材料研究所 magnetization, heat-capacity, and thermalexpansion
meansurements

Yusei Shimizu

Tohoku University

上田

顕

熊本大学

Elucidation of magnetic and electrical properties of novel
大学院先端科学
molecular crystals based on highly symmetric organic
研究部
molecules

Akira Ueda

Kumamoto University

担当所員：森
17

初果

高対称性有機分子からなる新規分子性結晶の磁気的・電気的性質の解明

担当所員：山下穣

18

三角格子反強磁性体の低温比熱測定

柄木

良友

琉球大学

教育学部

Low temperature specific heat measurements of triangularantiferromagnets

Yoshimoto Karaki

University of the
Ryukyus19

Yb 化合物の超低温における dHvA 効果測定

宍戸寛明

大阪府立大学

大学院工学研究 dHvA effect measurements on Yb compounds at ultra-low
temperatures
科

Hiroaki Shishido

Osaka Prefecture
University20

磁場角度分解熱輸送測定によるトポロジカル超
伝導の研究

水上

雄太

東京大学

大学院新領域創 Studies on topological superconductors by field-angle-resolved
Yuta Mizukami
thermal transport measurements
成科学研究科The University of
Tokyo

福田

昭

兵庫医科大学

物理学教室

Development of the high mobility semiconductor sample forthe measurements in the quantum Hall

Hyogo College ofMedicine

担当所員：勝本21

信吾

量子ホール効果測定のための高移動度半導体試
料作成

Akira Fukuda

No.
22

課題名
二次元銅酸化物のホール測定と MPMS による磁
神戸
化の測定

23
24

氏名

〃
ナノセンシングデバイスの研究開発

所属

Title

Name

Organization

士郎

山形大学

大学院理工学研 Hall coefficient measurement of 2D curates and measurementof magnetic property by MPMS
究科

Shiro Kanbe

Yamagata University

三政

拓也

山形大学

大学院理工学研
究科

Takuya Mimasa

Yamagata University

米谷

玲皇

東京大学

大学院新領域創Research and development of nanosensing device
成科学研究科

Reo Kometani

The University of
Tokyo

〃

ISSP Activity Report 2019

25

〃

黎

学思

東京大学

大学院新領域創成科学研究科〃Xuesi LiThe University of
Tokyo

26

〃

ペンエークウォン ケーマナット

東京大学

大学院新領域創成科学研究科〃

Penekwong Kehmnat

The University of
Tokyo

27

〃

西田

裕信

東京大学

大学院新領域創成科学研究科〃

Hironobu Nishida

The University of
Tokyo

28

〃

齊藤

正樹

東京大学

大学院新領域創成科学研究科〃

Masaki Saito

The University of
Tokyo

29

〃

橋本

将

東京大学

大学院新領域創成科学研究科〃Sho Hashimoto

The University of
Tokyo

30

〃

田中

駿太郎

東京大学

大学院新領域創成科学研究科〃Shuntaro Tanaka

The University of
Tokyo

31

微細素子化した強相関酸化物における直流電流誘起された電子相の開拓

成田

秀樹

京都大学

大学院理学研究 Investigation of electric current induced electronic phase in a
microfabricated strongly correlated oxides
科

Hideki Narita

Kyoto University

Kan Nakatsuji

Tokyo Institute of
Thecnnology

Tatsu Konno

Tokyo Institute of
Thecnnology

Kan Nakatsuji

Tokyo Institute of
Thecnnology

Akihiro Kimura

Tokyo Institute of
Thecnnology

担当所員：小森文夫

32

Si(111)4×1-In 基板上における Bi-In 表面合金の
電子状態

中辻

寛

東京工業大学

物質理工学院

33

〃

金野

達

東京工業大学

物質理工学院

酸素サーファクタントを用いた Fe 薄膜の成長過中辻程と電子状態寛東京工業大学

物質理工学院

34

Electronic structure of Bi-In surface alloy grown on
Si(111)4×1-In substrates〃
Oxygen surfactant assisted growth of Fe thin-films and theirelectronic states

103

35

〃

木村

彰博

東京工業大学

物質理工学院

36

窒素を飽和吸着させた Cu(001) 面における構造
緩和

山田

正理

中央大学

理工学部

Structural relaxation on a Cu(001) surface saturated withadsorbed nitrogen

Masamichi Yamada

Chuo University

37

Al-Pd-Ru 準結晶・近似結晶における空孔濃度の
金沢
研究

育三

東京学芸大学

自然科学系

Positron-annihilation studies of Al-Pd-Ru quasicrystal and its
approximant crystals

Ikuzo Kanazawa

Tokyo Gakugei
University〃

104
ISSP Activity Report 2019

No.

課題名

38

〃

高橋

39

特異なスピン状態を持つ希土類化合物表面及び吸着磁性原子電子状態のスピン状態の STS 解析

菅40

レアメタルフリー磁性材料 L10-FeCo の磁気特
性の解析

小嗣

41

〃

42

所属

Title

Name

Organization〃

Jun Takahashi

Gakugei University

東京学芸大学

大学院教育学研
究科

大阪大学

産業科学研究所

Scanning Tunneling Spectroscopy of surfaces of exotic rareearth materials and adsorbed magnetic atoms

Shigemasa Suga

Osaka University

真人

東京理科大学

基礎工学部

Analysis of magnetic properties of rare-metal-free supermagnetMasato Kotsugi

Tokyo University of
Science高橋優樹

東京理科大学

基礎工学部

Yuuki Takahashi

Tokyo University of
Science

STM を用いた L10-FeNi 表面における N サーフ
小嗣ァクタント効果の解析

真人

東京理科大学

基礎工学部

Masato Kotsugi

Tokyo University of
Science優樹

東京理科大学

基礎工学部

Yuuki Takahashi

Tokyo University of
Science

悟

九州大学

大学院工学研究 Electronic structure of graphene transferred on SiC periodic
nanosurfaces
院

Satoru Tanaka

Kyushu University

43
44

氏名

〃

潤
滋正

高橋

SiC ナノ周期表面上に転写したグラフェンの電子
田中
状態の観察

〃
Study of N surfactant effect on L10-FeNi by using STM
〃

45

〃

ビシコフスキー アントン

九州大学

大学院工学研究院〃

Visikovskiy Anton

Kyushu University

46

〃

魚谷

亮介

九州大学

大学院工学府〃

Ryosuke Uotani

Kyushu University

47

真空転写法により形成したツイストグラフェンの電子状態評価

田中

悟

九州大学

大学院工学研究 Evaluation of electronic structures of twisted graphenefabricated by vacuum transfer technique
院

Satoru Tanaka

Kyushu University

48〃

ビシコフスキー アントン

九州大学

大学院工学研究院〃

Visikovskiy Anton

Kyushu University

49

〃

今村

均

九州大学

大学院工学府〃

Hitoshi Imamura

Kyushu University

IV 族二次元材料及びそのヘテロ構造の低温走査トンネル顕微鏡観察高村由起子

北陸先端科学技 マテリアルサイ STM investigation of group IV 2D materials and theirheterostructures
術大学院大学
エンス系

Yukiko Takamura

JAIST

物質・材料研究 機能性材料研究 An efficient thin film growth combined with a machinelearning approach機構
拠点Isao Ohkubo

National Institute forMaterials Science

担当所員：長谷川50

幸雄

担当所員：リップマー
51

ミック

機械学習を導入した薄膜作製実験の高効率化

担当所員：吉信

淳

大久保

勇男

No.
52

課題名

所属

Title

塚原

規志

群馬工業高等専 電子メディア工 Building up the interface between a metal-organic framework
film and a superconductor
門学校
学科

顕微フォトルミネッセンス測定によるエルビウ
ムドープ GaAs のスペクトル微細構造に関する研 矢口
究

裕之

埼玉大学

有機金属構造体薄膜 - 超伝導体界面の構築

担当所員：秋山
53

氏名

Name

Organization

Noriyuki Tsukahara

Gunma College

大学院理工学研 Micro-photoluminescence study on the fine structure ofspectral lines in Er doped GaAs
究科

Hiroyuki Yaguchi

Saitama University

英文ISSP Activity Report 2019

54

〃

高宮

健吾

埼玉大学

総合技術支援センター〃

Kengo Takamiya

Saitama University

55

〃

清水

椋平

埼玉大学

大学院理工学研
究科〃

Ryohei Shimizu

Saitama University

56

北米産ホタルを用いた生物発光スペクトルにおける有害物質の濃度依存性調査

樋山

みやび

群馬大学

大学院理工学府

Concentration dependence of harmful substances in Photinus
pyralis firefly bioluminescence spectra

Miyabi Hiyama

Gunma University

57

〃

手塚

大輔

群馬大学

大学院理工学府〃

Daisuke Tezuka

Gunma University

58

合成ルシフェラーゼと結晶化ルシフェラーゼの
絶対発光量比較

樋山

みやび

群馬大学

大学院理工学府

Miyabi Hiyama

Gunma University

59

〃

小野

稜平

群馬大学

大学院理工学府

Ryohei Ono

Gunma University

60

宇宙線望遠鏡の焦点面ライトガイドの反射率測
定

吉田

龍生

茨城大学

理学部

Reflectance measurement of focal plane light concentrators for
Tetsuo Yoshidacosmic-ray telescopes

Ibaraki University

孝雄

静岡大学

学術院理学領域

Physical properties in rare earth intermetallic compounds athigh magnetic fields in low temperature

Takao Ebihara

Shizuoka University

ジュマエダ・
ジャトミカ

静岡大学

大学院自然科学
教育部〃

Jumaeda Jatmika

Shizuoka University

成田

秀樹

京都大学

大学院理学研究 Investigation of electric current induced electronic phase in a
microfabricated strongly correlated oxides 2科

Hideki Narita

Kyoto University

希土類 4f 電子数制御による新規アクチュエータ
竹中
材料の創製

康司

名古屋大学

大学院工学研究 Development of novel volume-change-driven actuatormaterials by control of rare earth 4f electron number
科

Koshi Takenaka

Nagoya University

泰範

名古屋大学

大学院工学研究
科

Yasunori Yokoyama

Nagoya University

担当所員：大谷
61
62

〃

63

微細素子化した強相関酸化物における直電流誘起された電子相の開拓 2

64

105

65

〃

義近

希土類金属間化合物の強磁場低温物性研究担当所員：廣井Comparative study of absolute bioluminescence between
synthetic luciferase and crystallized luciferase

海老原

善二

〃

横山

〃

106
ISSP Activity Report 2019

No.

課題名

66

〃

水野

67

〃

長谷川

68

氏名

基板上に成膜した CoPt 規則化強磁性体の磁化測
山浦
定

所属

Title

Name

Organization

名古屋大学

大学院工学研究科〃

Yosuke Mizuno

Nagoya University

名古屋大学

大学院工学研究科〃

Haruka Hasegawa

Nagoya University

淳一

東京工業大学

元素戦略研究セ Magnetization measurement of CoPt ordered ferromagnet
fabricated on substrate
ンター

Junichi Yamaura

Tokyo Institute of
Thecnnology

陽介
遥加

69

〃

真島

豊

東京工業大学

科学技術創成研究院〃

Yutaka Majima

Tokyo Institute of
Thecnnology

70

〃

遠山

諒

東京工業大学

物質理工学院〃

Ryo Toyama

Tokyo Institute of
Thecnnology

71

ラットリング原子を内包した金属間化合物の結晶構造と低温物性

山田

高広

東北大学

多元物質科学研 Characterization of crystal structures and magnetic properties
of intermetallic compounds containing rattling atoms
究所

Takahiro Yamada

Tohoku University

担当所員：川島直輝

72テンソル繰り込み群法の改良

原田

健自

京都大学

大学院情報学研
Improvement of tensor network renormalization group method Kenji Harada
究科

Kyoto University

73

蜂の巣格子拡張 Kitaev- Γ模型の基底状態相図

鈴木隆史

兵庫県立大学

大学院工学研究 Ground-state phase diagram of the extended Kitaev- Γ model
on a honeycomb lattice
科

Takafumi Suzuki

University of Hyogo

大貫

惇睦

琉球大学

理学部

Yoshichika Onuki

University of the
Ryukyus

本多

史憲

東北大学

金属材料研究所

Fuminori Honda

Tohoku University

担当所員：上床74
75

美也

高圧下における Eu 化合物の価数転移の探索〃

Investigation of valence transition on Eu compounds underhigh pressure〃

76

ウラン化合物の磁性の圧力効果

本多

史憲

東北大学

金属材料研究所 Effect of Pressure on the magnetism of uranium compounds

Fuminori Honda

Tohoku University

77

多形化合物 RIr2Si2(R= 希土類）の結晶育成と物
質評価 7

繁岡

透

山口大学

大学院創成科学 Crystal growth and characterization of polymorphic
compounds RIr2Si2 (R=rera earth) 7
研究科

Toru Shigeoka

Yamaguchi University

78

〃

内間

清晴

沖縄キリスト教
総合教育系
短期大学

Kiyoharu Uchima

Okinawa Christian
Junior College

透

山口大学

Toru Shigeoka

Yamaguchi University

清晴

沖縄キリスト教
総合教育系
短期大学

Kiyoharu Uchima

Okinawa Christian
Junior College

7980

擬三元化合物 Ce1-xMxNiC2(M = Y, La) の結晶育繁岡成と物質評価 3〃

内間〃

大学院創成科学 Crystal growth and characterization of pseudo-ternarycompounds Ce1-xMxNiC2(M = Y, La) 2
研究科
〃

No.
81

課題名
三角格子反強磁性体の低温磁性

82
83

〃
多型化合物 RIr2Si2(R= 希土類）磁気特性５

84

〃

氏名

所属

Title

柄木

良友

琉球大学

教育学部

阿曽

尚文

琉球大学

理学部

内間

清晴

沖縄キリスト教
総合教育系
短期大学

繁岡

透

山口大学

大学院創成科学研究科

研究社会連携セ
Magnetic and transport properties in YbH2+x
ンター

Low temperature magnetism of triangular antiferromagnets.
〃
Magnetic characteristics of polymorphic compounds
RIr2Si2(R=rare earth）5〃

Name

Organization

Yoshitomo Karaki

University of the
Ryukyus

Naofumi Aso

University of the
RyukyusKiyoharu Uchima

Okinawa Christian
Junior College

Toru Shigeoka

Yamaguchi University

Osamu Nakamura

Okayama University

85

YbH2+x の磁性と伝導中村修

岡山理科大学86

MnCo1-xGe 合金の磁気特性に関する研究 (2)

江藤

徹二郎

久留米工業大学 共通教育科

Study of magnetic properties in MnCo1-xGe alloys(2)Tetsujiro Eto

Kurume Institute ofTechnology

87

遷移金属化合物の高圧力下の輸送特性

仲間

隆男

琉球大学

理学部

Pressure effect on transport properties of transition metalcompounds

Takao Nakama

University of the
Ryukyus

譲二

琉球大学

大学院理工学研
究科

Jouji Ota

University of the
Ryukyus

Iduru Shigeta

Kagoshima University

ISSP Activity Report 2019

88

〃

太田

89

ハーフメタルホイスラー合金の磁気体積効果に
関する研究

重田 出

鹿児島大学

大学院理工学研 Study on the magneto-volume effect of half-metallic Heusler
alloys
究科

90

圧力誘起価数転移の探索と高圧下輸送特性

辺土

琉球大学

理学部

琉球大学

大学院理工学研
究科

91
92

〃
Eu 化合物の圧力誘起近藤状態の探索

正人

仲井間

憲李

辺土

正人

琉球大学

理学部

〃

Searching of pressure-induced valence transition and transport
Masato Hedo
properties under high pressure〃

Kenri Nakaima

Searching for pressure-induced Kondo state on Eu compounds Masato Hedo

University of the
Ryukyus
University of the
Ryukyus
University of the
Ryukyus

93

〃

伊覇

航

琉球大学

大学院理工学研
究科〃

Wataru Iha

University of the
Ryukyus

94

〃

松田

進弥

琉球大学

大学院理工学研
究科〃

Shinya Matsuda

University of the
Ryukyus

藤原

哲也

山口大学

大学院創成科学
Resistivity measurements of Ho1-xLaxRh2Si2 single crystal II
研究科

Tetsuya Fujiwara

Yamaguchi University

山本

嵩

山口大学

大学院創成科学研究科

Shu Yamamoto

Yamaguchi University

哲也

山口大学

大学院創成科学 Evidence for the magnetic ordering of Yb momentaccompanied by the valence transition
研究科

Tetsuya Fujiwara

Yamaguchi University

95
96

107

97

単結晶 Ho1-xLaxRh2Si2 の電気抵抗測定 (2)〃圧力誘起価数転移によって発生する Yb モーメン
藤原トの磁気秩序についての検証〃

108
ISSP Activity Report 2019

No.

課題名

氏名

所属

98

〃

西崎

裕哉

山口大学

大学院創成科学研究科

99

HoRh2-xCoxSi2 の比熱測定

藤原

哲也

山口大学

100

〃

山本

嵩

101 TmRh2Si2 化合物の単結晶育成

藤原

102

Title

Name

〃

Yuya Nishizaki

Yamaguchi University

大学院創成科学
Specific heat measurement of HoRh2-xCoxSi2
研究科

Tetsuya Fujiwara

Yamaguchi University

山口大学

大学院創成科学研究科

Shu Yamamoto

Yamaguchi University

哲也

山口大学

大学院創成科学
Single crystal growth of TmRh2Si2 compound
研究科

Tetsuya Fujiwara

Yamaguchi University

西崎

裕哉

山口大学

大学院創成科学研究科

Yuya Nishizaki

Yamaguchi University

103 高圧物性研究における圧力容器と媒体の影響

村田惠三

大阪経済法科大 ２１世紀社会総 Effect of Pressure Cell and Pressure Medium in High Pressure
学合研究センター Study

Keizo Murata

Osaka University of
Economics and Low

104 Fe を置換した Mn2Sb 化合物のスピン再配列

三井

好古

鹿児島大学

大学院理工学研
Spin-reorientation in Fe-modified Mn2Sb compounds
究科

Yoshifuru Mitsui

Kagoshima University

105

野口

滉平

鹿児島大学

大学院理工学研
究科

Kohei Noguchi

Kagoshima University

106 磁場で制御した Sm2Fe17N3 の磁気特性

小山

佳一

鹿児島大学

大学院理工学研 Magnetic properties of Sm2Fe17N3 prepared under magnetic
fields究科

Keiichi Koyama

Kagoshima University

107

尾上

昌平

鹿児島大学

研究推進機構研
究支援センターmasahira Onoue

Kagoshima University

108 磁場で制御された Mn-Ga 合金の磁気特性

小山

佳一

鹿児島大学

大学院理工学研 Magnetic properties of Mn-Ga alloys prepared under magnetic
Keiichi Koyama
fields
究科

Kagoshima University

109

〃

渡邊

有美

鹿児島大学

大学院理工学研
究科

Yumi Watanabe

Kagoshima University

110

銅オキシカルコゲナイドの高圧力下電気抵抗率
測定

今井

良宗

東北大学

大学院理学研究 Measurement of electrical resistivity in copper
oxychalcogenides under high pressure
科

Yoshinori Imai

Tohoku University

111

〃

木村

遼太

東北大学

大学院理学研究
科

Ryota Kimura

Tohoku University

112 磁場中熱処理した Cu-Mn-Al の磁気特性

三井

好古

鹿児島大学

大学院理工学研 Magnetic properties of Cu-Mn-Al prepared by in-fieldannealing
究科

Yoshifuru Mitsui

Kagoshima University

113

〃

中川

駿

鹿児島大学

大学院理工学研
究科

Shun Nakagawa

Kagoshima University

114

低次元化合物のクロスオーバー現象における超
伝導

久田

旭彦

徳島大学

大学院社会産業 Superconductivity on a crossover phenomenon of lowdimensional compounds
理工学研究部Akihiko Hisada

Tokushima University

〃

〃

〃

〃

〃

〃

〃

〃

〃

〃

Organization

No.
115

課題名

氏名

鉄系超伝導体 Ba1-xRbxFe2As2 の高圧下電気抵抗
芝内
率測定

所属

Title

Name

Organization

孝禎

東京大学

大学院新領域創 Measurements of the electrical resistivity in
Ba1-xRbxFe2As2 under high pressure
成科学研究科Takasada Shibauchi

The University of
Tokyo

116

〃

橋本

顕一郎

東京大学

大学院新領域創成科学研究科〃

Kenichiro Hashimoto

The University of
Tokyo

117

〃

松浦

康平

東京大学

大学院新領域創成科学研究科〃Kouhei Matsuura

The University of
Tokyo

118

〃

向笠

清隆

東京大学

大学院新領域創成科学研究科〃Kiyotaka Mukasa

The University of
Tokyo

119

〃

邱明瑋

東京大学

大学院新領域創成科学研究科〃

Mingwei Qiu

The University ofTokyo

Daisuke Akahoshi

Toho University120

高圧下における (Fe1-xZnx)2Mo3O8 の電気磁気特
赤星
性

大介

東邦大学

理学部

121

構造相転移を持つ BaCo1-xNixS2-y 系化合物の圧力下磁化率測定

伊藤

昌和

鹿児島大学

総合科学域総合 Magnetic susceptibility on BaCo1-xNixS2-y with the structuraltransition under pressure
教育学系

Masakazu Ito

Kagoshima University

122

〃

今村

有助

鹿児島大学

大学院理工学研
究科〃

Yusuke Imamura

Kagoshima University

123

〃

鹿島

頌太

鹿児島大学

大学院理工学研
究科〃

Shota Kashima

Kagoshima University

小林

拓矢

埼玉大学

Search for superconductivity in organic antiferromagnetic
大学院理工学研
insulator λ-(ET)2GaCl4 by further application of ultra-high究科pressures

Takuya Kobayashi

Saitama University

124

更なる超高圧印加による有機反強磁性絶縁体
λ-(ET)2GaCl4 の超伝導探索

Magnetoelectric properties of (Fe1-xZnx)2Mo3O8 under highpressures

ISSP Activity Report 2019

125

〃

綱川

仁志

埼玉大学

大学院理工学研
究科〃

Hotoshi Tsunakawa

Saitama University

126

〃

生沼

浩介

埼玉大学

大学院理工学研
究科〃

Kohsuke Oinuma

Saitama University

127

〃

小澤

宏彬

埼玉大学

大学院理工学研
究科〃

Hiroaki Ozawa

Saitama University

128

〃

伊藤 有咲

埼玉大学

大学院理工学研
究科〃

Arisa Ito

Saitama University

東京理科大学

理学部

Naoki Kase

Tokyo University of
Science東北大学

金属材料研究所 High pressure studies on URhSn

Maurya Arvind

Tohoku University

山形大学

大学院理工学研 Pressure effect of the magnetization for the ferromagnetic
Heusler alloys Ni2MnZ (Z= In, Sn, Sb)
究科

Yoshiya Adachi

Yamagata University

129

HfTe3 の高圧力印加による CDW の消失と新規超加瀬
伝導相の発現

130 URhSn の圧力下物性研究

109

131

Ni2MnZ (Z= In, Sn, Sb) 強磁性ホイスラー合金の磁化の圧力効果

直樹

モーリヤ
ルビン
安達

義也

ア

Suppression of CDW and the emergence of new
superconducting phase of HfTe3

110
ISSP Activity Report 2019

No.

課題名

氏名

所属

132

〃

吉田

圭吾

山形大学

大学院理工学研究科

133

反強磁性ホイスラー合金 Ru2MnZ (Z= Ge, Sn,Sb) のネール温度の圧力効果

安達

義也

134

〃

渡辺

135 RE3TiBi5 の圧力下電気抵抗測定
136

Title

Name

〃

Keigo Yoshida

Yamagata University

山形大学

大学院理工学研 Pressure effect of the Nel temperature for the antiferromagnetic
Yoshiya Adachi
Heusler alloys Ru2MnZ (Z= Ge, Sn, Sb)
究科

Yamagata University

健

山形大学

大学院理工学研
究科

Yamagata University

本山

岳

島根大学

大学院自然科学 Electrical resistivity measurements of RE3TiBi5 (RE=rare earth)Gaku Motoyama
under pressure
研究科

坪内

将紘

島根大学

大学院自然科学研究科

137 強磁性ウラン化合物 URh6Si4 の高圧物性

芳賀芳範

日本原子力研究 先端基礎研究セ High-pressure physical properties of ferromagnetic uranium
compound URh6Si4
開発機構
ンター

138 PrPt2Cd20 の高圧力下電気抵抗測定

広瀬

雄介

新潟大学

理学部

139

〃

高山

昂己

新潟大学

大学院自然科学研究科

140

遷移金属カルコゲナイドの圧力下 dHvA 効果の
研究

摂待

力生

新潟大学

理学部

141

〃

武藤

研太

新潟大学

大学院自然科学研究科

142 重い電子系希土類化合物の dHvA 効果

摂待

力生

新潟大学

理学部

143

佐野

純佳

新潟大学

大学院自然科学研究科

キュービックアンビルセルを用いた NMR 測定開
藤原
発

直樹

京都大学

中川

悟志

146 新しい Eu 化合物の圧力効果

光田

147

144
145

〃

〃

〃

〃

148 六方晶 Hf1-xTaxFe2+x の磁気熱量効果〃〃

Ken Watanabe

Shimane University

Masahiro Tsubouchi Shimane University
Yoshinori Haga

Electrical resistivity measurement under pressure of PrPt2Cd20 Yusuke Hirose〃

Organization

Japan Atomic Energy
AgencyNiigata University

Koki Takayama

Niigata University

de Haas-van Alphen effect under pressure in transition metal
chalcogenide

Rikio Settai

Niigata University〃

Kenta Muto

Niigata University

Rikio Settai

Niigata University

Sumika Sano

Niigata University

大学院人間・環 Development of NMR meansurements under pressure using a
cubic-anvil cell
境学研究科

Naoki Fujiwara

Kyoto University

京都大学

大学院人間・環境学研究科

Satoshi Nakagawa

Kyoto University

暁弘

九州大学

大学院理学研究
Pressure effect on new Eu-based compounds
院

Akihiro Mitsuda

Kyushu University

大山

耕平

九州大学

大学院理学府Oyama Kohei

Kyushu University

松本

圭介

愛媛大学

大学院理工学研
Magnetocaloric effect in Hf1-xTaxFe2+x
究科

Keisuke Matsumoto

Ehime University

de Haas-van Alphen effect in heavy fermion cerium
compounds
〃

〃

〃

No.

課題名

149

〃

氏名

所属

Title

Name

Organization〃

Ren Takaaze

Ehime University

高畦

恋

愛媛大学

大学院理工学研究科

150 直方晶 GdNiX1-x(X=Si,Ge) の比熱

松本

圭介

愛媛大学

大学院理工学研
Specific heat study of GdNiX1-x(X=Si,Ge)
究科

Keisuke Matsumoto

Ehime University

151

小林

将己

愛媛大学

大学院理工学研
究科

Masaki Kobayashi

Ehime University

152

キュービックアンビルセルを用いた NMR 測定開
桑山
発

昴典

京都大学

大学院人間・環 Development of NMR meansurements under pressure using a
cubic-anvil cell
境学研究科

153

スピン三重項超伝導体 UTe2 の磁性と超伝導の圧
本多
力効果

史憲

東北大学

金属材料研究所〃

担当所員：尾崎〃Effect of Pressure on the magnetism and superconductivity ofa spin triplet superconductor UTe2

Takanori Kuwayama Kyoto University
Fuminori Honda

Tohoku University

泰助
アントワーヌフロランス

Analysis and control of crystal and electronic structures of 2D
北陸先端科学技 マテリアルサイ
materials through concerted collaboration of experiment andAntoine Fleurence
術大学院大学
エンス系
theory

JAIST

〃

新田

寛和

北陸先端科学技 先端科学技術研
術大学院大学
究科

JAIST

156

透過型ラウエ法による鉄マンガン基恒弾性合金の単結晶試料の評価

池田

陽一

東北大学

157

サイト選択アニオンドーピングによるCe(Te1-xSex)3 の磁気抵抗測定

植田大地

沖縄科学技術大 量子物質科学ユ Magnetoresistance measurement of site selective anion doping
Daichi Ueta
Ce(Te1-xSex)3
学院大学
ニット

Okinawa Institute of
Science and Technology
Graduate University

大熊

隆太郎

沖縄科学技術大
岡田ユニット学院大学

Okinawa Institute of
Science and Technology
Graduate University

理気

琉球大学

理学部

岡部

孝俊

琉球大学

大学院理工学研
究科

161 (Ce1-xLax)5Ga2Ge 単結晶試料の極低温比熱測定

小林

理気

琉球大学

理学部

162

岡部

孝俊

琉球大学

大学院理工学研
究科

154

実験と計算の協奏による二次元材料の構造・電子状態解析及び制御

155
担当所員：益田

ISSP Activity Report 2019〃

Ce(Te1-xSex)3 単結晶試料の高エネルギー X 線ラ小林
ウエ装置による結晶方位同定

160

111

担当所員：金道Hirokazu Nitta

隆嗣

158
159

〃

〃

〃
浩一

金属材料研究所

Transmission Laue diffraction measurements for
Yoichi Ikeda
characterization of single crystalline FeMn-based elinvar alloys〃

Ryutaro Okuma

Alignment of Ce(Te1-xSex)3 single crystals by high-energy X-ray
Riki Kobayashi
Laue diffraction〃
Specific heat measurement at very low temperature on(Ce1-xLax)5Ga2Ge systems〃

Tohoku University

University of the
Ryukyus

Takatoshi Okabe

University of the
Ryukyus

Riki Kobayashi

University of the
Ryukyus

Takatoshi Okabe

University of the
Ryukyus

112
ISSP Activity Report 2019

No.

課題名

163

幾何学的フラストレート磁性体の強磁場磁化測
定

菊池

彦光

福井大学

学術研究院工学
Magnetization measurements of the frustrated magnets
系部門

Hikomitsu Kikuchi

University of Fukui

164

重い電子系化合物が示す非従来型超伝導と磁性
の相関

横山

淳

茨城大学

大学院理工学研 Interplay between unconventional superconductivity andmagnetism in heavy-fermion compounds
究科

Makoto Yokoyama

Ibaraki University

165

〃

ラフマント

茨城大学

大学院理工学研
究科

Rahmanto

Ibaraki University

166

新しいイルメナイト型キタエフ物質における新奇磁場誘起相の探索

原口祐哉

東京農工大学

大学院工学研究 Search for novel magnetic field induced phase in new ilmeniteYuya Haraguchi
type Kitaev compounds
院

167

〃

吉田

悠澄

東京農工大学

大学院工学研究院〃

Yuto Yoshida

168

〃

小日置

東京農工大学

大学院工学研究院〃

Yutaka Kobiki

169

積層化合物 MxTX2(M:3d 遷移金属，T:Nb, Ta,
X:S, Se)，Fe5-δ-xNixGeTe2 の強磁場磁化測定

道岡

千城

京都大学

High-field magnetization measurement of layered compounds
大学院理学研究
MxTX2(M:3d transition metal，T:Nb, Ta, X:S, Se) and科
Fe5-δ-xNixGeTe2

Tokyo Universityof Agriculture andTechnology

Chishiro Michioka

Kyoto University

170

〃

山中

俊介

京都大学

大学院理学研究
科

Shunsuke Yamanaka Kyoto University171

構造相転移を持つ BaCo1-xNixS2-y 系化合物の高磁場磁歪測定

伊藤

昌和

鹿児島大学

総合科学域総合 Magnetic strain on BaCo1-xNixS2-y system with the structuraltransition in high magnetic field
教育学系

Masakazu Ito

Kagoshima University

172

〃

鹿島

頌太

鹿児島大学

大学院理工学研
究科

Shota Kashima

Kagoshima University

173 金属ナノ結晶集合体の磁化特性

稲田

貢

関西大学

システム理工学
Magnetic properties of metal nanocrystal assemblies
部

Mitsuru Inada

Kansai University

174

〃

米澤

諒

関西大学

大学院理工学部

Ryo Yonezawa

Kansai University

175

topological Kondo insulator SmB6,YbB12 の磁化特性と比熱

伊賀

文俊

茨城大学

理学部

Fumitoshi Iga

Ibaraki University

176

〃

松浦

航

茨城大学

大学院理工学研
究科

Wataru Matsuura

Ibaraki University

文俊

茨城大学

理学部

中山

裕之

茨城大学

大学院理工学研究科

高圧合成による Zr ベース R 置換 B12 の強磁場中
伊賀の磁性と比熱，伝導

文俊

茨城大学

理学部

177
178
179

氏名

高圧合成新規希土類 Ce12 ホウ化物の強磁場中の
伊賀
磁化と比熱
〃

隆

所属

Title

〃

〃

〃

〃
Magnetic and thermal properties of topological Kondo
insulator SmB6 and YbB12〃

Name

Magnetic and thermal properties in high magnetic fields of rareearth hexa- and dodeca-borides produced by high pressure
Fumitoshi Iga
synthesis〃
Magnetic, transport and thermal properties in high magnetic
fields of Zr1-xRxB12 produced by high pressure synthesis

Organization

Tokyo Universityof Agriculture andTechnology
Tokyo Universityof Agriculture andTechnology

Ibaraki University

Hiroyuki Nakayama

Ibaraki University

Fumitoshi Iga

Ibaraki University

No.

課題名

180

〃

山田

貴大

茨城大学

大学院理工学研究科

181

異常に大きな BiS2 型層状化合物超伝導体の上部
臨界磁場

加瀬

直樹

東京理科大学

理学部

182 オーバードープ Bi-2223 単結晶の磁気輸送特性

渡辺

孝夫

弘前大学

183

〃

山口

隼平

184

ウラン系重い電子系化合物におけるその強磁場物性測定とスピン三重項超伝導の探索清水黒川

担当所員：徳永

氏名

所属

Title
〃

Name
Takahiro Yamada

Ibaraki University

Naoki Kase

Tokyo University of
Science

大学院理工学研 Magnetotransport properties of overdoped Bi-2223 single
crystals
究科

Takao Watanabe

Hirosaki University

弘前大学

大学院理工学研
究科

Shunpei Yamaguchi

Hirosaki University

悠晴

東北大学

金属材料研究所

Yusei Shimizu

Tohoku University

穂高

東京大学

大学院総合文化 Observation of the dynamics of vortices in a superconductor
by magneto-optical microscopy
研究科

Hodaka Kurokawa

The University of
Tokyo

東北大学

大学院工学研究 The crystal orientation dependence of metamagnetictransitions in Pd2MnGa alloys
科

Xiao Xu

Tohoku University

Tatsuya Ito

Tohoku University
Tokyo Universityof Agriculture andTechnology

Upper critical field of the BiS2-based superconductor〃
High-field experiments and exploration of odd-parity
superconductors in uranium heavy-fermion systems

将史

185

磁気光学法を用いた超伝導体中の磁束量子ダイ
ナミクス観測186

Pd2MnGa 合金におけるメタ磁性転移の結晶方位
許
依存性

皛

伊東

達矢

東北大学

大学院 工学研
究科

188 スピネル化合物の強磁場磁化過程

香取浩子

東京農工大学

大学院工学研究
High-field magnetization process of spinel materials
院

Hiroko Katori

189

〃

徳永

柊介

東京農工大学

大学院工学府〃

Shunsuke Tokunaga

190

〃

羽鳥

滋

東京農工大学

大学院工学府〃Shigeru Hatori

静岡大学

学術院理学領域

187

Organization〃

ISSP Activity Report 2019

Electronic states at high magnetic fields in Heavy Fermion
systems

Tokyo Universityof Agriculture andTechnology
Tokyo Universityof Agriculture andTechnology

113

191 重い電子系における強磁場中の電子状態研究

海老原

192

〃

丸山

博史

静岡大学

大学院総合科学技術研究科

193

トーラス型フェルミ面を持つラシュバ型半導体の量子極限伝導特性の研究

村川

寛

大阪大学

大学院理学研究 High field study for quantum limit transport properties of torus
Hiroshi Murakawa
Fermi surface in Rashba semiconductor
科

Osaka University

194

キャリア濃度制御した多層ディラック電子系
BaMnX2 (X=Sb, Bi) の量子伝導の研究

酒井

英明

大阪大学

大学院理学研究 Study of quantum transport phenomena in BaMnX2 (X=Sb, Bi)
Hideaki Sakai
hosting controlled quasi-2D Dirac-like carriers科

Osaka University

近藤

雅起

大阪大学

大学院理学研究科

Osaka University

195

〃

孝雄

〃

〃

〃

Takao Ebihara

Shizuoka University

Hiroshi Maruyama

Shizuoka University

Masaki Kondo

114
ISSP Activity Report 2019

No.

課題名

196

〃

中川

賢人

大阪大学

大学院理学研究
科

197

ランタノイド Kitaev 型量子スピン液体の探索のための強磁場磁化過程測定

北川

健太郎

東京大学

198 新規超伝導体 UTe2 の電子状態の圧力効果の研究 本多

史憲

東北大学

金属材料研究所

199

正四角台塔反強磁性体の強磁場電気磁気特性の
測定

健太

東京大学

200

遍歴強磁性体 UNi4P2 の強磁場磁化測定による基 モーリヤ
底状態の解明ルビン

東北大学

201 強磁性ウラン化合物の強磁場物性
202

木村

芳賀

所属

ア

芳範

超強磁場下測定による磁性半金属 EuP3 のフェル メイヨー
ミ面解析
レックス

203

〃

204 重い電子系における強磁場中の電子状態研究担当所員：松田
205

氏名

高橋

ア
浩

Title
〃

Name

Organization

Kento Nakagawa

Osaka University

大学院理学系研 High-field magnetization measurement for Lanthanoid Kitaevtype quantum spin liquid
究科

Kentaro Kitagawa

The University ofTokyo

Study of exotic electronic properties of a new superconductor
UTe2 under high pressure

Fuminori Honda

Tohoku University

大学院新領域創 High-field magnetoelectric properties in square-cupola-based
antiferromagnets
成科学研究科

Kenta Kimura

The University ofTokyo

金属材料研究所 High filed magnetization in itinerant ferromagnet UNi4P2

Maurya Arvind

Tohoku University

日本原子力研究 先端基礎研究セ High-field physical properties of ferromagnetic uranium
compounds
開発機構
ンター

Yoshinori Haga

Japan Atomic Energy
Agency東京大学

大学院工学系研 Fermi surface analysis of magnetic semimetal EuP3 measured
under high magnetic field
究科

Alex Hiro Mayo

The University of
Tokyo

大阪大学

大学院基礎工学研究科

Hidefumi Takahashi

Osaka University

静岡大学

大学院自然科学 Electronic states at high magnetic fields in Heavy Fermion
systems
教育部

Jumaeda Jatmika

Shizuoka University

文俊

茨城大学

理学部

Fumitoshi Iga

Ibaraki University

Hyouma Takemori

Ibaraki University

英史

ジュマエダ・
ジャトミカ

〃

康弘

近藤半導体 (Yb,R)B12、ほか新規高圧合成物質の伊賀
ワンターンコイル 120T 強磁場磁化と伝導

Magnetization and transport properties by using one-turn coilin a 120 T pulse magnet of Kondo insulator (Yb,R)B12 andnovel rare-earth borides producted by high-pressure synthesis

〃

竹森

氷馬

茨城大学

大学院理工学研
究科

207

ハーフホイスラー超伝導体における強磁場下量
子振動測定

芝内

孝禎

東京大学

大学院新領域創 Quantum oscillation measurements of half-Heusler
superconductors under high magnetic field
成科学研究科Takasada Shibauchi

The University of
Tokyo

208

〃

橋本

顕一郎

東京大学

大学院新領域創成科学研究科〃

Kenichiro Hashimoto

The University of
Tokyo

209

〃

水上

雄太

東京大学

大学院新領域創成科学研究科〃Yuta Mizukami

The University of
Tokyo

210

〃

石原

滉大

東京大学

大学院新領域創成科学研究科〃

Kota Ishihara

The University of
Tokyo

206
担当所員：小濱

〃

芳允

No.

課題名

氏名

所属

Title

Name

Organization

211

正四角台塔反強磁性体 Pb(TiO)Cu4(PO4)4 におけ木村
る強磁場中での電気磁気光学効果の研究

健太

東京大学

大学院新領域創 Optical magnetoelectric effect of the square-cupola-based
antiferromagnet Pb(TiO)Cu4(PO4)4 in a high magnetic field
成科学研究科

Kenta Kimura

The University of
Tokyo

212

パルス強磁場を用いた強磁場 NMR 測定による量井原
子磁性体の磁場誘起相の研究

慶彦

北海道大学

大学院理学研究 Pulsed field NMR study for field induced magnetic state inquantum magnets
院

Yoshihiko Ihara

Hokkaido University

大学院理学院

Koki Arashima

Hokkaido University

213

〃

荒島

洸樹

北海道大学

214

水素ドープ SmFeAsO エピタキシャル薄膜の超高磁場下における上部臨界磁場測定平松秀典

東京工業大学215

超強磁場電気抵抗測定による多電子ドープ La
１１１１-H の上部臨界磁場の研究

河智史朗

東京工業大学216 次世代レーザーとレーザー加工の基礎技術研究

吉富

大

産業技術総合研 電子光技術研究 Basic research on next generation laser systems and laser
machining technology
究所
部門

Dai Yoshitomi

National Institute ofAdvanced Industrial
Science and Technology

217

〃

鳥塚

健二

産業技術総合研 電子光技術研究
究所
部門

〃

Kenji Torizuka

National Institute ofAdvanced Industrial
Science and Technology

218

〃

高田

英行

産業技術総合研 電子光技術研究
究所
部門

〃

Hideyuki Takada

National Institute ofAdvanced Industrial
Science and Technology

219

〃

奈良崎

産業技術総合研 電子光技術研究
究所
部門

〃

Aiko Narazaki

National Institute ofAdvanced Industrial
Science and Technology

220

〃

小川

博嗣

産業技術総合研 分析計測標準研
究所
究部門

〃

Hiroshi Ogawa

National Institute ofAdvanced Industrial
Science and Technology

221

〃

佐藤

大輔

産業技術総合研 分析計測標準研
究所
究部門

〃

Daisuke Satoh

National Institute ofAdvanced Industrial
Science and Technology

222

〃

澁谷

達則

産業技術総合研 分析計測標準研
究所
究部門

〃

Tatsunori Shibuya

National Institute ofAdvanced Industrial
Science and Technology

223

〃

馬場

大輔

産業技術総合研 分析計測標準研
究所
究部門

〃

Daisuke Baba

National Institute ofAdvanced Industrial
Science and Technology

224

〃

盛合

靖章

産業技術総合研究所〃

Yasuaki Moriai

National Institute ofAdvanced Industrial
Science and Technology

225

〃

黒田

隆之助

産業技術総合研究所〃

Ryunosuke Kuroda

National Institute ofAdvanced Industrial
Science and Technology

226

〃

寺澤

英知

産業技術総合研究所〃

Eichi Terasawa

National Institute ofAdvanced Industrial
Science and Technology

担当所員：小林

〃

Upper critical magnetic fields measurements under extremely
科学技術創成研high magnetic fields of hydrogen-doped SmFeAsO epitaxial
Hidenori Hiramatsu
究院
films
Study of upper critical field in high doped La1111-H with using
元素戦略研究セ
magnetoresistance measurement under ultra-high magnetic
Shiro Kawachi
ンター
fieldsTokyo Institute ofTechnology
Tokyo Institute ofTechnology

洋平

愛子

ISSP Activity Report 2019

先端オペランド計測
技術オープンイノベ
ーションラボラトリ
先端オペランド計測
技術オープンイノベ
ーションラボラトリ

115

先端オペランド計測
技術オー プンイノベ
ーションラボラトリ

116
ISSP Activity Report 2019

No.

課題名

227

青色半導体レーザー用ファイバ型光コンバイナ
の開発

藤本

靖

千葉工業大学

228

レーザー加工された金属表面の超高速発光によ
る研究

末元

徹

豊田理化学研究所

229 レーザー加工状態の分光測定に関する研究 II

富田

卓朗

徳島大学

大学院社会産業 Study on laser modification by using optical spectroscopic
measurement II
理工学研究部

Takuro Tomita

Tokushima University

230

〃

山口

誠

秋田大学

大学院理工学研
究科

Makoto Yamaguchi

Akira University

231

パルスレーザーを用いた分光測定のための光源開発

大間知

関西学院大学

理工学部

Junko Omachi

Kansai Gakuin
University

232

和周波発生による新たな赤外分光に資するファ
イバーレーザーシステムの開発

田中

耕一郎

京都大学

大学院理学研究 Development of fiber laser systems for up-conversation
infrared spectroscopy
科

Koichiro Tanaka

Kyoto University

233

〃

内田

健人

京都大学

大学院理学研究科〃

Kento Uchida

Kyoto University

234

〃

北条

真之

京都大学

大学院理学研究科〃

Masayuki Hojo

Kyoto University

森山

匡洋

東京大学

大学院理学系研
CFRP processing with short wavelength pulsed laser
究科

Masahiro Moriyama

The University ofTokyo

時間分解非線形分光法によるコヒーレントフォ
ノン測定系における磁気光学ユニットの構築

牧野

哲征

福井大学

学術研究院工学 Magnetooptical effect of coherent phonons of by time-resolved
Takayuki Makino
nonlinear spectroscopy
系部門

University of Fukui

時間分解非線形分光法を用いた希土類酸化物の237 コヒーレントフォノンにおける外部磁場効果の
観測

山出

拓史

福井大学

大学院工学研究 Magnetooptical effect of coherent phonons of rare-earth oxides
Takuji Yamadestudied by time-resolved nonlinear spectroscopy
科

University of Fukui

238

〃

浅井

郁帆

福井大学

大学院工学研究
科〃

Takaho Asai

University of Fukui

239

〃

竹内 智哉

福井大学

大学院工学研究
科〃

Tomoya Takeuchi

University of Fukui

名古屋大学

シンクロトロン Spin- and angle-resolved photoemission study of spin-polarized
Takahiro Ito
光研究センター electronic structure of nanolamellar MAX phase compounds

Nagoya University

名古屋大学

大学院工学研究
科

Nagoya University

235 短波長パルスレーザーによる CFRP 加工
担当所員：板谷236

担当所員：近藤
240
241

氏名

潤子

所属
工学部

Title

Name

Organization

Development on fiber power combiner for GaN semiconductor
Yasushi Fujimoto
lasersChiba Institute ofTechnology

Study on laser ablated metal surfaces by ultrafast luminescence
Tohru Suemoto
spectroscopy

Toyota Physical andChemical ResearchInstitute〃Light source development for spectroscopy using pulse laser

治郎

猛

スピン分解角度分解光電子分光による層状 MAX
伊藤
層化合物のスピン偏極状態の研究
〃

林

孝寛
直輝

〃

Naoki Hayashi

No.

課題名

242

〃

243
244
245

氏名

所属

Title

鍋平

直輝

名古屋大学大学 大学院工学研究
院科〃

Naoki Nabehira

Nagoya University

〃

古田

貫志

名古屋大学

大学院工学研究
科〃

Kanji Furuta

Nagoya University

〃

細谷

知輝

名古屋大学

大学院工学研究
科〃

Tomoki Hosoya

Nagoya University

小林

正起

東京大学

Observation of Dirac cone state at the interface between
大学院工学系研
topological insulator Bi1-xSbx and perpendicular magnet MnGa Masaki Kobayashi
究科
layers植田大地

沖縄科学技術大 量子物質科学ユ Observation of electric state in a van der Waals compound
Ce(Te,Se)3 by ARPES
学院大学
ニット

Daichi Ueta

Okinawa Institute of
Science and Technology
Graduate University

大熊

隆太郎

沖縄科学技術大
岡田ユニット学院大学

Ryutaro Okuma

OIST

Zhang Weilu

Sophia University

トポロジカル絶縁体 Bi1-xSbx と垂直磁化膜
MnGa 界面におけるディラックコーンの観測

ファンデルワールス結合を有する金属間化合物
246 Ce(Te,Se)3 の光電子分光法による電子状態の観測
ファンデルワールス結合を有する金属間化合物
247 Ce(Te,Se)3 の光電子分光法による電子状態の観測担当所員：岡﨑
248

Observation of electric state in a van der Waals compound
Ce(Te,Se)3 by ARPES

Name

Organization

The University of
Tokyo

浩三

T’ 構造をもつ銅酸化物高温超伝導体の角度分解
光電子分光による研究

チャン
イル

ウェ

上智大学

機能創造理工学 Photoemission spectroscopy of electron-doped T'-cuprate
superconductors
科

249 励起子絶縁体と関連物質の時間分解光電子分光

溝川

貴司

早稲田大学

理工学術院
進理工学部

250

密岡

拓心

早稲田大学

理工学術院

〃

ISSP Activity Report 2019

励起子絶縁体 Ta2NiSe5 及びモット絶縁体
251 Ca2RuO4 における光誘起絶縁体 - 金属転移の研究
高分解能レーザー励起光電子顕微鏡を用いた鉄252 系超伝導体の電子ネマティック状態の実空間観
察

久保田

雄也

先 Time-resolved photoemission study of excitonic insulators andTakashi Mizokawa
related materials

高輝度光科学研 XFEL 利用研究
究センター
推進室

〃

Takumi Mitsuoka

Investigation of the photo-induced insulator-to-metal transition
Yuya Kubota
in an exitonic insulator Ta2NiSe5 and a Mott insulator Ca2RuO4

Waseda University
Waseda University
JASRI

橋本

顕一郎

東京大学

Real-space observation of electronic nematicity in iron大学院新領域創based superconductors by using a high-resolution laser
成科学研究科
photoemission electron microscope

Kenichiro Hashimoto

The University of
Tokyo

253

〃

水上

雄太

東京大学

大学院新領域創成科学研究科〃Yuta Mizukami

The University of
Tokyo

254

〃

石田

浩祐

東京大学

大学院新領域創成科学研究科〃

Kousuke Ishida

The University of
Tokyo

255

〃

辻井

優哉

東京大学

大学院新領域創成科学研究科〃

Masaya Tsujii

The University of
Tokyo

あかり

早稲田大学

先進理工学部

Akari Takayama

Waseda University

実可子

早稲田大学

先進理工学研究科

Mikako Sakamoto

Waseda University

256

117

257

時間分解 ARPES を用いたノーダルライン半金属
高山
単層銅シリサイドの電子緩和過程の観測〃

坂本

Observation of electronic relaxation process of nodal-line
semimetal monolayer-Cu2Si by time-resolved ARPES〃

118
ISSP Activity Report 2019

No.

課題名

氏名

所属

258

レーザー励起光電子顕微鏡を用いた抵抗変化メ
モリ材料のナノ物性計測

木下

健太郎

東京理科大学

理学部

259

〃

奥田

裕司

東京理科大学

理学部

260

〃

福本

紳智

東京理科大学

理学部

Title
Nano physical property measurement of resistance change
memory material using laser excited photo-emission
microscope

Name

Organization

Kentaro Kinoshita

Tokyo University of
Science〃

Yuji Okuda

Tokyo University of
Science〃

Shinji Fukumoto

Tokyo University of
Science

一般研究員・大阪大学 先端強磁場科学研究センター / General Researcher・Center for Advanced High Magnetic Field Science Osaka University
No.

課題名

担当所員：萩原

氏名

所属

Title

Name

Organization

政幸（大阪大学）

1

Fe-Ni-Cr 合金におけるマルテンサイト変態の時
間依存性

福田

隆

大阪大学

大学院工学研究 Time dependence of martensitic transformation in Fe-Ni-Cr
alloys科

2

パルス強磁場を用いた強相関電子系物質の強磁場物性の研究

竹内

徹也

大阪大学

低温センター

3

〃

大貫

惇睦

琉球大学

理学部

4

Ni2MnX(X = In, Al, Sn, Sb) 系及び Pd2MnSn 系の新規ホイスラー合金の超磁歪の高速磁場応答 左近
性の研究

拓男

龍谷大学

理工学部

Research on time dependences of magnetstriction of Ni2MnX(X
Takuo Sakon= In, Al, Sn, Sb) type and Pd2MnSn type Heusler alloys

Ryukoku University5

水平磁場印加によるタンパク質結晶の磁場効果の研究（前期の研究の継続）

大阪大谷大学

薬学部

Effect of protein crystallization by the application of horizontal
Syou Maki
magnetic force.(Continuation of the research)

Osaka Ohtani
University

6

HFESR を用いた配位子場分裂したｆ電子副準位
福田
構造の決定

貴光

大阪大学

大学院理学研究 Determination of f-electronic sublevels arising from ligand fieldTakamitsu Fukuda
splittings by means of HFESR
科Osaka University

Atsuhiro Harada

Osaka University

牧祥Magnetic properties of strongly correlated electron systems
under pulsed high magnetic fields〃

Takashi Fukuda

Osaka University

Tetsuya Takeuchi

Osaka University

Yoshichika Onuki

University of the
Ryukyus

7

〃

原田

篤大

大阪大学

大学院理学研究科

8

一次元交替ボンド反強磁性体の単結晶磁化過程

浅野

貴行

福井大学

学術研究院工学 Magnetization process of one-dimensional bond-alternating
antiferromagnet
系部門

Takayuki Asano

University of Fukui

9

〃

西首

時夫

福井大学

大学院工学研究科

Tokio Nishikubi

University of Fukui

野口悟

大阪府立大学

大学院理学系研
Development of the cryostat for pulsed high magnetic field
究科

Satoru Noguchi

Osaka Prefecture
University

中川豪

大阪府立大学

大学院理学系研
究科

Takeshi Nakagawa

Osaka Prefecture
University

1011パルス強磁場用極低温実験装置の開発
〃

〃

〃

〃

No.

課題名

氏名

所属

Title

Name

Organization

12

1 次元構造を有するカルボン酸架橋錯体の構造と本多
磁性に関する研究

善太郎

埼玉大学

大学院理工学研 Structure and magnetic properties of carboxylate-bridged oneZentaro Honda
dimensional metal complexes
究科

Saitama University13

高温超伝導体のパルス強磁場下電流電圧特性

掛谷

一弘

京都大学

大学院工学研究 Current-voltage characteristics in high-Tc superconductors
under pulsed high magnetic elds
科

Itsuhiro Kakeya

Kyoto Univeristy14三角格子反強磁性体の強磁場磁化過程

南部

雄亮

東北大学

金属材料研究所 High field magnetization on a triangular lattice

Yusuke Nambu

Tohoku University

15

新規量子スピン系の強磁場磁性山口博則

大阪府立大学

大学院理学系研
High-field magnetic properties of new quantum spin systems
究科

Hironori Yamaguchi

Osaka Prefecture
University

Yoshiki Iwasaki

Osaka Prefecture
University

ISSP Activity Report 2019

119

16

〃

岩崎

義己

大阪府立大学

大学院理学系研
究科

17

新しいパルス強磁場高圧下 ESR 装置の開発と応
用

櫻井

敬博

神戸大学

研究基盤センタ Development and application of new pulsed high magnetic
field high pressure ESR system
ー

Takahiro Sakurai

Kobe University18

三角格子反強磁性体 CsCuCl3 のパルス強磁場下における圧力下磁化測定

櫻井

敬博

神戸大学

研究基盤センタ High pressure magnetization measurement of triangularantiferromagnet CsCuCl3 under pulsed high magnetic fieldーTakahiro Sakurai

Kobe University

19

ワイル半金属のランダウ準位の磁場方位依存性
の研究

村川

寛

大阪大学

大学院理学研究
Angular dependent Landau level in Weyl semimetal科

Hiroshi Murakawa

Osaka university

20

〃

駒田

盛是

大阪大学

大学院理学研究
科

Komada Moriyoshi

Osaka University

21

第二種ワイル半金属の強磁場中量子輸送特性の
研究

村川

寛

大阪大学

大学院理学研究 High magnetic fied study on transport properties of type II
Weyl semimetals
科

Hiroshi Murakawa

Osaka university

22

〃

中岡

優大

大阪大学

大学院理学研究
科

Yudai Nakaoka

osaka university

23

強いスピン - 軌道相互作用を活かした酸化物スピ
松野
ントロニクス丈夫

大阪大学

大学院理学研究
Oxide spintronics utilizing strong spin-orbit coupling科

Matsuno Jobu

Osaka University24

層状反強磁性体 EuMnBi2 における Eu サイトの元素置換効果の解明

酒井

英明

大阪大学

大学院理学研究 Study of the variation in antiferromagnetic order induced bychemical substations in EuMnBi2
科

Hideaki Sakai

Osaka University

25

〃

中川

賢人

大阪大学

大学院理学研究
科〃

Nakagawa Kento

Osaka University

26

〃

近藤

雅起

大阪大学

大学院理学研究科〃

Masaki Kondo

Graduate Schoolof Science Osaka
University27

SmB6/SrB6/CaB6 人工超格子の強磁場中輸送係
数測定

宍戸

寛明

大阪府立大学

大学院工学研究 Transport measurements for SmB6/SrB6/CaB6 superlattices
under high magnetic field科

Hiroaki Shishido

Osaka Prefecture
University28

CaBa(Co1-xFex)4O7(x=0,1/4,1/2,3/4,1) 単結晶
試料の強磁場下での磁化・電気分極・ESR 測定

桑原

英樹

上智大学

理工学部

Hideki Kuwahara

Sophia University

〃

〃

〃

Magnetization, electric polarization, and ESR measurements
for CaBa(Co1-xFex)4O7 (x=0,1/4,1/2,3/4,1) single crystals in
pulsed high magnetic fields

120

No.

課題名

29

〃

氏名

所属

遠藤

颯

上智大学

大学院理工学研
究科

Title

Name

Organization〃

Hayate Endo

Sophia University

ISSP Activity Report 201930

正四角台塔反強磁性体の強磁場中 ESR

木村

健太

東京大学

大学院新領域創 High-field ESR measurements of square-cupola-based
antiferromagnets
成科学研究科

Kenta Kimura

The University of
Tokyo

31

秩序型アニオン構造を持った酸水素化物
EuVO2H の強磁場磁化測定

高津

浩

京都大学

大学院工学研究 High-field magnetization study of EuVO2H with an anion
ordered structure科

Hiroshi Takatsu

Kyoto Univeristy

32

ナノ構造を導入した希土類系高温超伝導薄膜における強磁場中臨界電流密度に関する研究

土屋

雄司

名古屋大学

工学部

Study on the critical current density in high-magnetic field in
RE-based cuprate superconductors with nano-structure

Yuji Tsuchiya

Nagoya University

33

2 次元三角格子反強磁性体 Mn(OH)2 の強磁場
ESR の異方性

佐藤

博彦

中央大学

理工学部

Anisotropic measurement of high-field ESR of two-dimensional
Hirohiko Sato
triangular-lattice antiferromagnet Mn(OH)2

34

〃

大寺

翔也

中央大学

大学院理工学研
究科

掛谷

一弘

京都大学

35

REFe2O4 の磁化測定（RE=Tm,Lu）〃

Chuo University

Ohtera Shoya

Chuo University

大学院工学研究
Magnetization measurement in REFe2O4(RE=Tm,Lu)
科

Itsuhiro Kakeya

Kyoto University

36

〃

田中

勝久

京都大学

大学院工学研究
科〃

Katsuhisa Tanaka

Kyoto University

37

〃

キム

ユジン

京都大学

大学院工学研究
科〃

YouJin Kim

Kyoto University

物質合成・評価設備 G クラス / Materials Synthesis and Characterization G Class Researcher
No.

課題名

氏名

所属

1

フラストレートした 1 次元鎖三角格子系イリジ
ウム酸化物の新奇磁性の研究

松平和之

九州工業大学

大学院工学研究 Study on novel magnetic property in frustrated iridates with
1D chains structure on the triangular lattice
院

Kazuyuki Matsuhira

Kyushu Institute ofTechnology

2

〃

花手

洋樹

九州工業大学

大学院工学研究院

Hiroki Hanate

Kyushu Institute ofTechnology

Daichi Ueta

Okinawa Institute of
Science and Technology
Graduate University

Title

〃

Name

Organization3

空間反転対称性の破れた CeTSi3(T = Rh, Ir, Pd,
植田 大地Pt) の多結晶試料の作成

沖縄科学技術大 量子物質科学ユ Sample growth of a non-centrosymmetric heavy-electron
CeTSi3 (T = Rh, Ir, Pd, Pt)
学院大学
ニット

4

貫入型遍歴電子遷移金属炭化物・窒化物の磁気
体積効果

和氣

剛

京都大学

大学院工学研究 Magneto-volume effect on itinerant electron interstitial
科材料工学専攻 transition metal carbides and nitrides

Takeshi Waki

Kyoto University5

超臨界メタノール条件下でのエステル交換反応に固体触媒が与える影響

秋月

信

東京大学

大学院新領域創 The effect of solid catalysts on the ester exchange reaction insupercritical methanol
成科学研究科

Makoto Akizuki

The University of
Tokyo

6

〃

張

瑞子

東京大学

大学院新領域創成科学研究科Zhang

The University of
Tokyo

〃

Ruizi

No.
7

課題名

氏名

高温高圧条件下の水 - メタノール溶媒が固体触媒
秋月反応に及ぼす影響の検討

所属

Title

Name

Organization

信

東京大学

大学院新領域創 Investigation of the effect of hot compressed methanol-water
mixed solvent on solid catalyzed reactions
成科学研究科

Makoto Akizuki

The University ofTokyo

Shimada Ayako

The University of
Tokyo

ISSP Activity Report 2019

121

8

〃

島田

綾子

東京大学

大学院新領域創成科学研究科9

単結晶 CaMn1-xSbxO3 の誘電特性および磁気特
性の研究

谷口

晴香

岩手大学

理工学部

10

数値計算を用いた泥岩中の化学的浸透現象に伴う歪についての検討

廣田

翔伍

東京大学

大学院新領域創 Numerical investigation of rock deformation caused bychemical osmosis in mudstones
成科学研究科11

ナノ構造制御材料を用いたクリーンエネルギー
デバイス開発

細野

英司

12

〃

太田

道広

13

〃

ジュド
ヤンカ

14

プラズマ風洞による宇宙往還機熱防護システムの動的酸化に関する研究

桃沢愛

東京都市大学

15

〃

田中

聖也

16

〃

山田

17

新しい希土類磁石の探求齋藤

18

マイクロミキサを用いた機能性無機ナノ粒子の
連続合成

陶

19

天然鉱物の微細組織と化学組成変化の関係

永嶌

真理子

山口大学

大学院創成科学
Effect of chemical variety on micro-texture in natural minerals Mariko Nagashima
研究科

Yamaguchi University20

超臨界二酸化炭素、塩水、岩石間の相互作用が起きる場の基礎的理解

秋月

信

東京大学

大学院新領域創 Research on fundamentals of interaction between supercritical
Makoto Akizuki
carbon dioxide, brine and rock
成科学研究科The University of
Tokyo

21

〃

外野

圭太

東京大学

大学院新領域創成科学研究科

Hokano Keita

The University of
Tokyo

22

靜電浮遊法を用いた過冷却液体急冷法によるボロン系準結晶の探索

木村

薫

東京大学

大学院新領域創 Search for quasicrystalline boron using rapid quenching fromsuper-cooled liquid by levitation technique
成科学研究科

Kaoru Kimura

The University of
Tokyo

23

〃

高橋

昂宏

東京大学

大学院新領域創成科学研究科Takahiro Takahashi

The University of
Tokyo

〃

Study of dielectric and magnetic properties of single crystalline
Haruka Taniguchi
CaMn1-xSbxO3

Iwate University

Shogo Hirota

The University ofTokyo

産業技術総合研 省エネルギー研 Development of devices for clean energy by using
nanostructure controlled materials
究所
究部門

Michihiro Ohta

National Institute ofAdvanced Industrial
Science and Technology

産業技術総合研 省エネルギー研
究所
究部門

〃

Eiji Hosono

National Institute ofAdvanced Industrial
Science and Technology

産業技術総合研 省エネルギー研
究所
究部門

〃

Priyanka Jood

National Institute ofAdvanced Industrial
Science and Technology

工学部医用工学 Investigation on dynamic oxidation of thermal protection
system using plasma wind tunnel
科

Ai Momozawa

Tokyo City University

東京大学

大学院工学系研
究科〃

Seiya Tanaka

The University of
Tokyo

慎

東京大学

大学院工学系研
究科〃

Shin Yamada

The University of
Tokyo

哲治

千葉工業大学

工学部

Tetsuji Saito

National Institute ofAdvanced Industrial
Science and Technology

Kiwamu Sue

National Institute ofAdvanced Industrial
Science and Technology

プリ

Research of new rare-earth magnets

産業技術総合研 化学プロセス研 Continuous synthesis of functional inorganic nanoparticles
using a micromxer
究所
究部門

究

〃

〃

122
ISSP Activity Report 2019

No.

課題名

氏名

24

カーボンナノチューブおよびグラフェンの媒分
散処理方法探索及び、分散液を使用した高機能
材料の作製

熊代

25

Sm1-xSrxFeO3 (0.1 ≦ x ≦ 0.9) の高温における磁性と熱電特性に関する研究

中津川

26

準結晶・近似結晶の磁性に関する研究 III

27

所属

Title

Name

Organization

東京大学

Search for establishing the method to disperse carbon
大学院工学系研
nanotubes and graphene, and making the hybrid materials
究科with the dispersion

Tsuguo Kumashiro

The University of
Tokyo

博

横浜国立大学

大学院工学研究 Magnetism and thermoelectric properties at high temperature
in Sm1-xSrxFeO3(0.1 ≦ x ≦ 0.9)
院

Hiroshi Nakatsugawa

Yokohama National
University

鈴木

慎太郎

東京理科大学

基礎工学部

Shintaro Suzuki

Tokyo University of
Science

多形物質 M2GeO5(M=V,Cr,Fe,Al,Ga) の磁化測
定

香取

浩子

東京農工大学

大学院工学研究 Magnetization measurements of polymorphism
M2GeO5(M=V,Cr,Fe,Al,Ga)
院

Hiroko Katori

Tokyo Universityof Agriculture andTechnology

28

〃

柿本

和勇

東京農工大学工学府〃

Kazuo Kakimoto

29

〃

大木

祐明

東京農工大学

大学院工学研究院〃

Yoshiaki Ohki

30

新規イルメナイト型ハニカム格子磁性体の物性
解明

原口

祐哉

東京農工大学

大学院工学研究 Physical properties of novel ilmenite-type honeycomb latticemagnets
院

Yuya Haraguchi

31

〃

有海

大樹

東京農工大学工学府

Hiroki Arikai

岡崎竜二

東京理科大学

理工学部

32

層状ロジウム酸化物 KxRhO2 の磁気相図

嗣生

Magnetism of quasicrystal and approximants III〃
Magnetic phase diagram of the layered rhodium oxides
KxRhO2

Tokyo Universityof Agriculture andTechnology
Tokyo Universityof Agriculture andTechnology
Tokyo Universityof Agriculture andTechnology
Tokyo Universityof Agriculture andTechnology

Ryuji Okazaki

Tokyo University of
Science

33

〃

栗田

寛士

東京理科大学

大学院理工学研
究科〃

Kanji Kurita

Tokyo university ofscience

34

〃

坂林

北斗

東京理科大学

大学院理工学研
究科〃

Hokuto Sakabayashi

Tokyo University of
Science

35

〃

石井

まゆ

東京理科大学

大学院理工学研
究科〃

Ishii Mayu

Tokyo University Of
Science36

ハーフメタルホイスラー合金の遍歴電子強磁性体のスピンゆらぎ理論による解析に関する研究

重田

出

鹿児島大学

大学院理工学研 Study on analysis of half-metallic Heusler alloys by the spin
fluctuation theory of itinerant electron ferromagnets
究科

Iduru Shigeta

Kagoshima University

37

ホイスラー化合物での反強磁性の研究

廣井

政彦

鹿児島大学

大学院理工学研
Study on antiferromagnetism in Heusler compounds
究科

Masahiko Hiroi

Kagoshima University

鹿児島大学

大学院理工学研
究科

Tomohito Nonoyama Kagoshima University

38

〃

野々山

智仁

39

レアメタルフリー磁性材料 L10-FeCo の磁気特
性の解析

小嗣

真人

東京理科大学

基礎工学部材料 Analysis of magnetic properties of rare-metal-free supermagnet “L10-FeCo”
工学科

Masato Kotsugi

Tokyo University of
Science

40

〃

高橋

優樹

東京理科大学

基礎工学部材料工学科

Takahashi Yuuki

Tokyo University of
Science〃〃ISSP Activity Report 2019

No.

課題名

41

宇宙線望遠鏡の焦点面ライトガイドの反射率測
定

吉田

龍生

茨城大学

理学部

42

高温高圧下における下部マントル鉱物への窒素の取り込みに関する研究

福山

鴻

東京大学

大学院理学系研 The study on nitrogen incorporation into the lower-mantle
minerals under high pressure and high temperature
究科

Ko Fukuyama

The University of
Tokyo

43

層状マンガン酸水素化物における圧力効果山本隆文

東京工業大学

フロンティア材
Pressure Effect on Layered Manganese Oxyhydride
料研究所

Takafumi Yamamoto

Tokyo Institute ofTechnology

44

高圧中性子実験における発生可能な温度圧力拡大を目指した高圧セル開発

柿澤

翔

東京大学

地殻化学実験施 Technical development of high pressure cell for high pressure
neutron diffraction experiment設

Sho Kakizawa

The University of
Tokyo

45

新規遷移金属スクッテルダイト化合物の高圧合
成と物性

丹羽

健

名古屋大学

大学院工学研究 High-pressure synthesis and physical properties of noveltransition metal skutterudite compounds
科

Ken Niwa

Nagoya University

46

〃

市川

将成

名古屋大学

大学院工学研究
科

Masanari Ichikawa

Nagoya University47

塩化アンモニウムを用いた遷移金属窒化物の高
圧合成

丹羽

健

名古屋大学

大学院工学研究 High-pressure synthesis of transition metal nitrides using
ammonium chloride as nitrogen source科

Ken Niwa

Nagoya University

48

〃

生駒

鷹秀

名古屋大学

大学院工学研究
科

Takahide Ikoma

Nagoya University49

高温高圧下における新規酸窒化物蛍光体の合成と発光特性評価

佐々木

名古屋大学

大学院工学研究 Synthesis and characterization of oxynitride phosphors underhigh pressure and high temperature科

Takuya Sasaki

Nagoya University

50

〃

近藤

名古屋大学

大学院工学研究
科

Shinsuke Kondo

Nagoya University

名古屋大学

大学院工学研究 High-pressure synthesis and crystal structure of novel ternarytransition metal–metalloid intermetallic compounds
科

Takuya Sasaki

Nagoya University

Koichi Takano

Nagoya University

51
52
53

氏名

拓也

超高圧力合成法を用いた 3 元系遷移金属 - メタロ
佐々木
イド金属間化合物の創成

信介〃
遷移金属ハライドの高圧合成

拓也

所属

Title

Name

Reflectance measurement of focal plane light concentrators for
Tatsuo Yoshidacosmic-ray telescopes

〃

〃

〃

Organization
Ibaraki University

高野

航一

名古屋大学

大学院工学研究
科

今井

良宗

東北大学

大学院理学研究High pressure synthesis of transition metal halides
科

Yoshinori Imai

Tohoku University

Katsuya Konno

Tohoku University

〃

123

54

〃

今野

克哉

東北大学

大学院理学研究科55

ピストンシリンダー実験による高温高圧下での有機化合物の化学反応の解明

篠崎

彩子

北海道大学

大学院理学研究 High-pressure and high-temperature experiments on chemical
reaction of organic compounds.
院

Ayako Shiozaki

Hokkaido University

56

フラストレート系層状希土類化合物の高圧合成と磁気的性質関根

ちひろ

室蘭工業大学

大学院工学研究 High-pressure synthesis and magnetic properties of frustrated
layered rare-earth compounds
科

Chihiro Sekine

Muroran Institute ofTechnology

57

〃

佐藤

雄也

室蘭工業大学

大学院工学研究
科

Yuya Sato

Muroran Institute ofTechnology

〃

〃

124
ISSP Activity Report 2019

No.

課題名

58

廃プラスチックの炭化による二酸化炭素回収お
よび貯留

59

〃

60

オレイン酸の超臨界水ガス化工程におけるニッ
ケル触媒の不活性化メカニズムの解明

61

〃

62

氏名

所属

Title

Name

Organization

東京大学

環境安全研究セ
Carbon capture through carbonization of plastic waste
ンター

Teppei Nunoura

The University ofTokyo

ジェニファーチャー ウ
ィー ファン

東京大学

大学院新領域創成科学研究科Jennifer Chia Wee
Fern

The University of
Tokyo

布浦

鉄兵

東京大学

環境安全研究セ Nickel catalyst deactivation in supercritical water gasificationof oleic acid
ンター

Teppei Nunoura

The University of
Tokyo

ダイアング
バタンガ

東京大学

大学院新領域創成科学研究科

Diane Gubatanga

The University ofTokyo

エネルギー貯蔵型空気電池の電極活物質の開発

大友

順一郎

東京大学

大学院新領域創 Development of electrode materials of energy storage type ‐fuel cells
成科学研究科

Junichiro Otomo

The University of
Tokyo

63

〃

中西

泰介

東京大学

大学院新領域創成科学研究科Nakanishi Taisuke

The University of
Tokyo

64

炭酸塩ルーピングにおける二酸化炭素利用法の
開発

大友

順一郎

東京大学

大学院新領域創
Development of CO2 utilization in carbonate looping
成科学研究科

Junichiro Otomo

The University of
Tokyo

65

〃

七瀬

浩希

東京大学

大学院新領域創成科学研究科Koki Nanase

The University of
Tokyo

66

化学ループ法を用いた合成ガス製造システムの設計およびキャリア開発

大友

順一郎

東京大学

大学院新領域創 Development of carrier materials and system design forchemical looping syngas production systems
成科学研究科

Junichiro Otomo

The University of
Tokyo

67

〃

引間

脩

東京大学

大学院新領域創成科学研究科Shu Hikima

The University of
Tokyo

68

プロトン伝導型固体酸化物燃料電池の電解質積
層セルの開発及び界面挙動の研究

大友

順一郎

東京大学

大学院新領域創 Development of solid oxide fuel cells with bi-layer protonconducting electrolyte thin films
成科学研究科

Junichiro Otomo

The University of
Tokyo

69

〃

阪田

一真

東京大学

大学院新領域創成科学研究科

Kazuma Sakata

The University of
Tokyo

大友

順一郎

東京大学

大学院新領域創 Development of microscale-measurement of hetero interface ofJunichiro Otomo
SOFCs
成科学研究科The University ofTokyo

Yuta Nasu

The University of
Tokyo

70

燃料電池材料界面の局所測定手法の開発

布浦

鉄兵

〃

〃

〃

〃

〃

〃

71

〃

那須

雄太

東京大学

大学院新領域創成科学研究科72

高温高圧水中でのバイオマス変換に使用するマイクロポーラス材料の安定性向上

大島

義人

東京大学

大学院新領域創 Improving stability of microporous material for biomass
upgrading in sub- and supercritical water
成科学研究科Yoshito Oshima

The University of
Tokyo

73

〃

アピバンボリラク チャンウィット

東京大学

大学院新領域創成科学研究科Apibanboriak
Chanwit

The University of
Tokyo

74

カルシウムループ法によるメタン生成プロセス
の開発

大友

東京大学

大学院新領域創
Development of Ca looping process for production of methane Junichiro Otomo
成科学研究科順一郎〃〃

The University of
Tokyo

No.

課題名

氏名

75

〃

李

76

プロトン伝導性固体電解質薄膜を用いた低温作
動燃料電池・電解合成セルの開発

大友

77

〃

78

所属

Title

Name

Organization

ISSP Activity Report 2019東京大学

大学院新領域創成科学研究科順一郎

東京大学

Development of low-temperature solid oxide fuel cells and
大学院新領域創electrolysis cells using proton-conducting solid electrolyte thin Junichiro Otomo
成科学研究科films

The University of
Tokyo

松尾

拓紀

東京大学

大学院新領域創成科学研究科

Hiroki Matsuo

The University ofTokyo

ケミカルループ燃焼法における酸素キャリアの反応モデリング

大友

順一郎

東京大学

大学院新領域創 Reaction modeling in chemical looping systems with new
oxygen carrier materials
成科学研究科

Junichiro Otomo

The University of
Tokyo

79

〃

山村

泰平

東京大学

大学院新領域創成科学研究科

Taihei Yamamura

The University of
Tokyo

80

中温域でのアンモニア電解合成における新規電極触媒開発及び反応機構解明 (1)

大友

順一郎

東京大学

Development of new electrochemical catalyst for ammonia
大学院新領域創electrolysis and evaluation of reaction mechanism at
成科学研究科intermediate temperature

Junichiro Otomo

The University of
Tokyo

81

〃

今田

佳那

東京大学

大学院新領域創成科学研究科

Kana Imata

The University of
Tokyo

82

イオン及び電子伝導特性の制御による SOFC 性
能の改善

大友

順一郎

東京大学

大学院新領域創 Improvement of solid-oxide electrolysis cells performance bycontrolling ionic and electronic transport properties.
成科学研究科

Junichiro Otomo

The University of
Tokyo

83

〃

オルティスコ
ラレスフリアンアンドレス

東京大学

大学院新領域創成科学研究科Ortiz Corrales Julian The University ofAndresTokyo

84

イオンー電子混合伝導体の異相界面の作製と輸送現象の解明

大友

順一郎

東京大学

大学院新領域創 Formation of heterojunction of mixed ionic electronic
conductors and clarification of its transport phenomena
成科学研究科

Junichiro Otomo

The University of
Tokyo

85

〃

甚野

幸一

東京大学

大学院新領域創成科学研究科

Koichi Jinno

The University of
Tokyo

大友

順一郎

東京大学

大学院新領域創
Reactor design for ammonia electrosynthesis
成科学研究科

Junichiro Otomo

The University ofTokyo

Kazutaka Fukuda

The University of
Tokyo

86

アンモニア電解合成の反応器設計

智漢

〃

〃

〃

〃

〃

〃

Jihan LeeThe University of
Tokyo

125

87

〃

福田

一峻

東京大学

大学院新領域創成科学研究科88

スピンコート法による高 La/W 比のタングステ
ン酸ランタン薄膜の低温合成およびセル性能評
価

大友

順一郎

東京大学

Low temperature synthesis of high La/W ratio lanthanum
大学院新領域創
tungstate thin film by spin coating and cell performance
成科学研究科
evaluation

Junichiro Otomo

The University of
Tokyo

89

〃

戸田

亮輔

東京大学

大学院新領域創成科学研究科

Ryousuke Toda

The University of
Tokyo

90

中温域でのアンモニア電解合成における新規電極触媒開発及び反応機構解明 (2)

大友

順一郎

東京大学

Development of new electrochemical catalyst for ammonia
大学院新領域創electrolysis and evaluation of reaction mechanism at
成科学研究科intermediate temperature

Junichiro Otomo

The University of
Tokyo

91

〃

秋山

大樹

東京大学

大学院新領域創成科学研究科Daki Akiyama

The University of
Tokyo

〃

〃

〃

126
ISSP Activity Report 2019

No.

課題名

92

積層型燃料電池の輸送特性制御と電解合成への
応用

大友

順一郎

東京大学

大学院新領域創 Control of transport properties of stacked fuel cells and its
application to electrochemical synthesis
成科学研究科

Junichiro Otomo

The University of
Tokyo

93

〃

田島

星也

東京大学

大学院新領域創成科学研究科

Seiya Tajima

The University of
Tokyo

94

プロトン伝導固体酸化物を用いた鉄のアンモニ
ア電解合成機構の解明

大友

順一郎

東京大学

大学院新領域創 Mechanism of Ammonia Electrosynthesis using Fe-based
Catalysts with Proton-Conducting Solid Electrolyte
成科学研究科

Junichiro Otomo

The University of
Tokyo

95

〃

李

東京大学

大学院新領域創成科学研究科Chen-I Li

The University of
Tokyo

96

アンモニア電解合成における選択性向上の検討

大友

順一郎

東京大学

大学院新領域創Study on promotion of selectivity in ammonia electrosynthesis Junichiro Otomo
成科学研究科The University of
Tokyo

97

〃

山本

和範

東京大学

大学院新領域創成科学研究科The University of
Tokyo

98

高温高圧水―アルコール混合溶媒が金属酸化物
ナノ粒子の合成に与える影響の解明

大島

義人

東京大学

大学院新領域創 Research on the effect of water-alcohol mixture on metal oxide
Yoshito Oshima
nanoparticle synthesis
成科学研究科The University of
Tokyo

99

〃

劉

東京大学

大学院新領域創成科学研究科Yuan Liu

The University of
Tokyo

東京大学

大学院新領域創 Characterization of metal catalysts supported on mesoporous
materials and graphene oxide
成科学研究科

Takehiko Sasaki

The University ofTokyo

Takuya Kinoshita

The University of
Tokyo

100
101
102

氏名

建毅

源

メソポーラスマテリアル・グラフェンオキサイド佐々木に担持した金属触媒のキャラクタリゼーション

岳彦

所属

Title

〃

〃

〃

〃

Name

Kazunori Yamamoto

Organization

木下

拓哉

東京大学

大学院新領域創成科学研究科

超臨界水中での NiFe2O4/ 還元型酸化グラフェン
布浦
粒子合成に関する研究

鉄兵

東京大学

環境安全研究セ Study on supercritical water synthesis of NiFe2O4/reduced
graphene oxide composite
ンター

Teppei Nunoura

The University of
Tokyo

東京大学

大学院新領域創成科学研究科Xiaoyun Zhou

The University of
Tokyo

〃

暁雲

〃

103

〃

周

104

超臨界水を利用した金属酸化物ナノ粒子の合成とその形態制御

大島

義人

東京大学

大学院新領域創 Synthesis and morphology control of metal oxide nanoparticles
Yoshito Oshimausing supercritical water
成科学研究科The University of
Tokyo

105

〃

織田

耕彦

東京大学

大学院新領域創成科学研究科Yasuhiko Orita

The University of
Tokyo

106

チタン置換六方晶フェライトの化学組成と磁気
異方性

植田

浩明

京都大学

大学院理学研究 chemical composition and magnetic anisotropy of Tisubstituted hexaferrites
科

Hiroaki Ueda

Kyoto university

107

〃

奥津

陽太

京都大学

大学院理学研究
科

Yota Okutsu

Kyoto University

108

キャリアドープされたノーダルリング半金属における超伝導体探索

岡本

佳比古

名古屋大学

大学院工学研究Superconductivity in carrier-doped nodal-ring semimetal
科

Yoshihiko Okamoto

Nagoya University

〃

〃

〃

No.

課題名

109

高温高圧下で多軽元素が鉄ー含水ケイ酸塩系に及ぼす影響の解明

飯塚

理子

東京大学

大学院理学系研 Behavior of light elements in iron-silicate-water system underhigh pressure and high temperature
究科

Riko Iizuka-Oku

The University ofTokyo

110 高圧下での MoSi2 型構造の FeAl2 結晶の作製

木村

薫

東京大学

大学院新領域創 High pressure synthesis of MoSi2 type iron aluminide,
FeAl2 crystal
成科学研究科

Kaoru Kimura

The University of
Tokyo

111

〃

飛田

一樹

東京大学

大学院新領域創成科学研究科

Kazuki Tobita

The University of
Tokyo

112

希土類オルソフェライト単結晶成長とテラヘル
ツスピン制御

中嶋

誠

大阪大学

レーザー科学研 Single crystal growth for rare-earth orthoferrite and ultrafast
terahertz spin control
究所

Makoto Nakajima

Osaka University

113

〃

木本

翔大

大阪大学

レーザー科学研究所〃

Shodai Kimoto

Osaka University

114

〃

小池

遥平

大阪大学

レーザー科学研究所〃

Yohei Koike

Osaka University

剛

東京大学

大学院新領域創 Exploration of nontrivial electronic and structural properties inTsuyoshi Kimura
multiferroic-related materials
成科学研究科The University of
Tokyo

115

氏名

マルチフェロイック関連物質における新規電子・木村
構造物性の探求に関する研究

所属

Title

〃

Name

Organization

ISSP Activity Report 2019

127

116

〃

木村

健太

東京大学

大学院新領域創成科学研究科〃

Kenta Kimura

The University of
Tokyo

117

〃

勝吉

司

東京大学

大学院新領域創成科学研究科〃

Tsukasa Kazuyoshi

The University of
Tokyo

118

〃

三澤

龍介

東京大学

大学院新領域創成科学研究科〃

Ryusuke Misawa

The University of
Tokyo

119

〃

林田

健志

東京大学

大学院新領域創成科学研究科〃

Takeshi Hayashida

The University of
Tokyo

120

〃

八木

直輝

東京大学

大学院新領域創成科学研究科〃

Naoki Yagi

The University of
Tokyo

121

強相関物質における回転対称性の破れとトポロ
ジカル超伝導状態に関する研究

水上

雄太

東京大学

大学院新領域創 Studies on rotational symmetry breaking and topologicalsuperconductivity in strongly correlated electron systems
成科学研究科Yuta Mizukami

The University of
Tokyo

122

〃

石田

浩祐

東京大学

大学院新領域創成科学研究科〃

Kousuke Ishida

The University of
Tokyo

123

〃

田中

桜平

東京大学

大学院新領域創成科学研究科〃

Ohei Tanaka

The University of
Tokyo

124

〃

石原

滉大

東京大学

大学院新領域創成科学研究科〃

Kota Ishihara

The University of
Tokyo

125

〃

辻井

優哉

東京大学

大学院新領域創成科学研究科〃

Masaya Tsujii

The University of
Tokyo

128

No.

課題名

126

〃

氏名

所属

Title

Name

Organization〃

Mikihiko Saito

The University of
Tokyo

ISSP Activity Report 2019

斎藤

三樹彦

東京大学

大学院新領域創成科学研究科127 外場制御可能な磁気超構造を有する物質の開発

有馬

孝尚

東京大学

大学院新領域創 Exploration of materials hosting controllable magnetic
superstructure
成科学研究科Taka-hisa Arima

The University of
Tokyo

128

〃

徳永

祐介

東京大学

大学院新領域創成科学研究科〃

Yusuke Tokunaga

The University of
Tokyo

129

〃

阿部

伸行

東京大学

大学院新領域創成科学研究科〃Nobuyuki Abe

The University of
Tokyo

130

〃

藤間

友理

東京大学

大学院新領域創成科学研究科〃Yuri Fujima

The University of
Tokyo

131

〃

近江

毅志

東京大学

大学院新領域創成科学研究科〃Tsuyoshi Omi

The University of
Tokyo

132

〃

荒木 勇介

東京大学

大学院新領域創成科学研究科〃Araki Yusuke

The University of
Tokyo

133

〃

佐藤

樹

東京大学

大学院新領域創成科学研究科〃Tatsuki SatoThe University of
Tokyo

134

〃

山本

圭祐

東京大学

大学院新領域創成科学研究科〃

Keisuke Yamamoto

The University of
Tokyo

135

〃

渡辺

義人

東京大学

大学院新領域創成科学研究科〃Yoshito Watanabe

The University of
Tokyo

136

〃

西

東京大学

大学院新領域創成科学研究〃

Kenta Nishi

The University of
Tokyo

137

〃

柳内

晃

東京大学

大学院新領域創成科学研究科〃

Hikaru Yagiuchi

The University of
Tokyo

138

〃

尾亦

恭輔

東京大学

大学院新領域創成科学研究科〃Kyosuke Omata

The University of
Tokyo

139

〃

磯貝

レオナ

東京大学

大学院新領域創成科学研究科〃Leona Isogai

The University of
Tokyo

140

〃

吉田

健斗

東京大学

大学院新領域創成科学研究科〃

Kento Yoshida

The University of
Tokyo

141

バナジウムカルコゲナイドにおける動的短距離秩序状態の研究

片山

尚幸

名古屋大学

大学院工学研究 Study of dynamic Short-Range ordering state in vanadiumchalcogenides
科

Naoyuki Katayama

Nagoya University

142

〃

前田

秦

名古屋大学

大学院工学研究科

Shin Maeda

Nagoya University

健太

〃

No.

課題名

氏名

所属

143

バナジウム硫化物・セレン化物におけるスピン
軌道複合秩序状態

片山

尚幸

名古屋大学

大学院工学研究 Spin-Orbital entangled ordered state in vanadiumchalcogenides
科

Naoyuki Katayama

Nagoya University

144

〃

小島

慶太

名古屋大学

大学院応用物理学専攻

Keita Kojima

Nagoya University

145

高温高圧下で多軽元素が鉄ー含水ケイ酸塩系に及ぼす影響の解明

フー
ジン

シュウ

東京大学

大学院理学系研 Behavior of light elements in iron-silicate-water system underhigh pressure and high temperature
究科

He Xuejing

The University of
Tokyo

146

〃

市東

力

東京大学

大学院理学系研
究科

Chikara Shito

The University of
Tokyo

147

強相関物質における回転対称性の破れと超伝導に関する研究

竹中

崇了

東京大学

大学院新領域創 Studies on rotational symmetry breaking and superconductivity
Takaaki Tanaka
in strongly correlated electron system
成科学研究科

Title

〃

〃

Name

Organization

The University ofTokyo

物質合成・評価設備 U クラス / Materials Synthesis and Characterization U Class Researcher
No.
1

課題名
ペロブスカイト関連化合物の高圧合成

氏名

所属

Title

Name

Organization

Yoshiyuki Inaguma

Gakushuin University

ISSP Activity Report 2019

稲熊

宜之

学習院大学

理学部

紘一郎

学習院大学

理学部

〃

Koichiro Ueda

Gakushuin University

学習院大学

大学院自然科学研究科〃

Hiromu Mori

Gakushuin University〃

Kazunari Izumi

Gakushuin University

High-pressure synthesis of perovskite-related compounds

2

〃

植田

3

〃

森

4

〃

和泉

一成

学習院大学

大学院自然科学研究科

5

誘起モット系における絶縁相、金属相（超伝導相）
宮川
の磁化測定

和也

東京大学

大学院工学系研 Magnetism of Insulating Phase and Metallic(Superconductor)
Phase in Organic Mott systems.
究科

Kazuya Miyagawa

The University of
Tokyo

6

燃料電池の電解質・電極の異相界面の解析と燃料電池の性能向上

大友

順一郎

東京大学

大学院新領域創 Analysis if heterogeneous inteface of electrolyte and electrode,
Junichiro Otomo
and improvement of SOFC
成科学研究科The University of
Tokyo

7

〃

黄

東京大学

大学院新領域創成科学研究科Rui Huang

The University of
Tokyo

東京大学

大学院理学系研 Synthesis of calcite referance materials by a high-pressure
press
究科

Yusuke Miyajima

The University of
Tokyo

8

高圧プレスによるカルサイト標準物質の合成

宮嶋

紘夢

睿
佑典

〃

129

No.

課題名

130

氏名

所属

Title

Name

Organization

氏名

所属

Title

Name

Organization

長期留学研究員 / Long Term Young Researcher

ISSP Activity Report 2019

No.

課題名

1

有機半導体の分子吸着に伴って生じるトポロジ
カル表面状態の変化

北澤辰也

東京理科大学

大学院理工学研 Modification of Topological surface states upon adsorption oforganic semiconductors
究科

2

PdPc の表面吸着によって生じる Cu(111) ショッ
下澤皐介
クレー状態の変化

東京理科大学

理工学部

Tatsuya Kitazawa

Modification of Cu(111)Shockley stateupon adsorption of PdPc Kosuke Shimozawa

Tokyo University of
ScienceTokyo University of
Science

短期期留学研究員 / Short Term Young Researcher
No.

課題名

1

単結晶表面上のメタンの解離吸着に関する表面
科学研究

氏名
黄育杰

所属
大阪大学

Title

大学院工学研究 Surface science study on methane dissociation over single
crystal surfaces
科

Name

Organization

Wong Yee Jie

Osaka University令和元年度 中性子科学研究施設 共同利用課題一覧 / Joint Research List of Neutron Scattering Researcher 2019
No.

課題名

氏名

所属

Title

Name

Organization

・申請装置 4G: GPTASISSP Activity Report 2019

131

1

GPTAS（汎用 3 軸中性子分光器）IRT 課題

佐藤

卓

東北大学

多元物質科学研
IRT project of GPTAS
究所

Taku J Sato

Tohoku University2

磁性準結晶中の隠れた磁気秩序の探索

佐藤

卓

東北大学

多元物質科学研
Hidden magnetic order in magnetic quasicrystals
究所

Taku J Sato

Tohoku University

3

素励起に対する反転対称性の破れの影響

佐藤

卓

東北大学

多元物質科学研 Effect of non-centrosymmetricity to dispersions of elementary
excitations
究所

Taku J Sato

Tohoku University

4

歪んだ籠目格子遍歴磁性体 Yb3Ru4Al12 の磁気構
佐藤
造

卓

東北大学

多元物質科学研 Magnetic order in the 2D itinerant breathing kagome
compound Yb3Ru4Al12
究所

Taku J Sato

Tohoku University

5

六方晶フェライト Ba2Zn2Fe12O22 およびBaFe12O19 の超交換相互作用

内海重宜

公立諏訪東京理 工学部機械電気 Superexchange interaction of hexagonal ferrites
Ba2Zn2Fe12O22 and BaFe12O19
科大学
工学科

Shigenori Utsumi

Suwa University of
Science

6

Sr2RuO4 の非弾性散乱

古川

はづき

お茶の水女子大 基幹研究院 自学
然科学系

Inelastic neutron scattering experiments on Sr2RuO4

Hazuki Furukawa

Ochanomizu
University7

強磁性超伝導体における磁性と超伝導の研究

古川

はづき

お茶の水女子大 基幹研究院 自学
然科学系

A study of magnetic state in ferromagnetic superconductors

Hazuki Furukawa

Ochanomizu
University8

空間反転対称性の破れた超伝導体の非弾性散乱

古川

はづき

お茶の水女子大 基幹研究院 自学
然科学系

Inelastic neutron scattering experiments on noncentrosymmetric superconductors

Hazuki Furukawa

Ochanomizu
University

9

トポロジカル超伝導体の非弾性散乱

古川

はづき

お茶の水女子大 基幹研究院 自学
然科学系

Inelastic neutron scattering experiments on topologicalsuperconductors

Hazuki Furukawa

Ochanomizu
University10

二次元重い電子系化合物 Ce(Te1-xSex)3 の研究

小林

理気

琉球大学

理学部

Study of Two-Dimensional Heavy Fermion Compound Ce(Te1xSex)3

Riki Kobayashi

University of the
Ryukyus11

パイロクロア反強磁性体 Na3T(CO3)2Cl の磁気励
那波
起

和宏

東北大学

多元物質科学研 Spin excitations on the pyrochlore antiferromagnet
Na3T(CO3)2Cl究所

Kazuhiro Nawa

Tohoku University

12

量子スピン鎖におけるスピノンラシュバ分裂

那波

和宏

東北大学

多元物質科学研
Spinon Rashba splitting on the quantum spin chain
究所

Kazuhiro Nawa

Tohoku University13

反強磁性体 CeNiC2 の Pt 置換効果

郷地

順

東京大学

物性研究所

Effect of Pt-substitution on the Antiferromagnetic Compound
CeNiC2Jun Gouchi

The University of
Tokyo

14

強誘電体の相転移機構（変位型及び秩序−無秩序重松型）に関する統一的理解の確立

宏武

山口大学

教育学部

Establishment of the unified explanation about the phasetransition mechanism (displacive and orderdisorder type) in
Ferroelectrics

Hirotake Shigematsu Yamaguchi University

15

スピンアイスにおけるトポロジカル相転移広明

首都大学東京理工学研究科物
Topological phase transition in spin ice
理学専攻

門脇

Hiroaki Kadowaki

Tokyo Metoropolitan
University

132
ISSP Activity Report 2019

No.

課題名

氏名

16

電気磁気交差相関現象を示す重い電子系反強磁性体 Ce3TiBi5 の磁気構造

阿曽17

熱電材料 Mg3Sb2 のフォノンダイナミクス

李

尚文
哲虎

所属

Name

Organization

Magnetic structure in a heavy fermion antiferromagnet
理学部物質地球
Ce3TiBi5 exhibiting electromagnetic cross-correlation
科学科
phenomenon

Naofumi Aso

University of the
Ryukyus

産業技術総合研 省エネルギー研
Phonon dynamics on thermoelectric material of Mg3Sb2
究所
究部門

Chul-Ho Lee

National Institute ofAdvanced Industrial
Science and Technology

Takatsugu Masuda

The university of tokyo

琉球大学

Title

・申請装置 5G: PONTA
18

PONTA（高性能偏極中性子散乱装置）IRT 課題 益田

隆嗣

東京大学

物性研究所

IRT project of PONTA

19

マグネトプランバイト型コバルト酸化物
SrCo12O19 の磁場誘起磁気秩序

浅井

晋一郎

東京大学

物性研究所

Field-induced magnetic order for magnetoplumbite-type cobalt
Shinichiro Asaioxide SrCo12O19

The University of
Tokyo

20

メイプルリーフ格子物質 MgMn3O7・3D2O の粉
浅井
末中性子回折実験

晋一郎

東京大学

物性研究所

Neutron Diffraction study of Maple Leaf Compound
MgMn3O7・3D2O

Shinichiro Asai

The University of
Tokyo

21

メイプルリーフ格子物質 MgMn3O7・3D2O の中浅井
性子非弾性散乱

晋一郎

東京大学

物性研究所

Inelastic Neutron Scattering of Maple Leaf Compound
MgMn3O7・3D2O

Shinichiro Asai

The University of
Tokyo

22

Cu2(4-F-bza)4(2-mpyz) に吸着された酸素分子の
浅井
磁気励起

晋一郎

東京大学

物性研究所

Magnetic Excitation in Oxygen Molecule Adsorbed in
Nanoporous Metal Complex Cu2(4-F-bza)4(2-mpyz)

Shinichiro Asai

The University of
Tokyo

23

スピン状態クロスオーバーが起こるダブルペロ
ブスカイト型コバルト酸化物 Sr2CoNbO6 の中性 浅井子非弾性散乱研究

晋一郎

東京大学

物性研究所

Inelastic neutron scattering study for double perovskite cobalt
oxide Sr2CoNbO6

Shinichiro Asai

The University of
Tokyo

24

三角スピンチューブ CsCrF4 の圧力下中性子回折 益田

隆嗣

東京大学

物性研究所

Neutron diffraction experiment on triangular spin tube CsCrF4 Takatsugu Masuda

25

鉄系超伝導体のスピン揺動李26

磁場中の中性子回折を利用した Ni2V2O7 のスピ
ン系の決定

長谷

27

The University ofTokyo

産業技術総合研 省エネルギー研
Spin fluctuations of iron-based superconductors
究所
究部門

Chul-Ho Lee

National Institute ofAdvanced Industrial
Science and Technology

正司

物質・材料研究 中性子散乱グル Determination of the spin system in Ni2V2O7 using neutron
diffraction in magnetic fields
機構ープ

Masashi Hase

National Institute forMaterials Science

TOPAN（東北大理：３軸型偏極中性子分光器）
藤田
IRT 課題全基

東北大学

金属材料研究所 IRT project of TOPAN

Masaki Fujita

Tohoku University

28

近藤半金属におけるワイルフェルミオンの磁気
状態

岩佐

和晃

茨城大学

フロンティア応
用原子科学研究 Magnetic states of Weyl fermion in Kondo semimetals
センター

Kazuaki Iwasa

Ibaraki University

29

T' 構造銅酸化物 Pr2-xCaxCuO4 における磁気相関藤田と超伝導の研究全基

東北大学

金属材料研究所

Masaki Fujita

Tohoku University

30

PLCCO の格子振動にみられる超伝導対称性の観
池内
測

和彦

総合科学研究機 中性子科学セン
Phonons and superconducting gap in PLCCO
構
ター

Kazuhiko Ikeuchi

Comprehensive Research
Organization for Scienceand Society

哲虎

・申請装置 6G: TOPAN

Study of spin correlations and superconductivity inT'-structured cuprate oxide Pr2-xCaxCuO4

No.

課題名

氏名

所属

Title

Name

Organization

Takatsugu Masuda

The university of tokyo

・申請装置 C1-1: HER

ISSP Activity Report 2019

133

31

HER ( 高エネルギー分解能３軸型中性子分光器 )益田
IRT 課題

隆嗣

東京大学

物性研究所

32

a-Cu2V2O7 のマグノン電場効果

佐藤

卓

東北大学

多元物質科学研 Inelastic neutron scattering measurements on the
a-Cu2V2O7 under electric field
究所

Taku J Sato

Tohoku University

33

量子スカーミオン励起の探索

佐藤

卓

東北大学

多元物質科学研
Quantum magnetic-skyrmion excitation
究所

Taku J Sato

Tohoku University

34

素励起に対する反転対称性の破れの影響

佐藤

卓

東北大学

多元物質科学研 Effect of non-centrosymmetricity to dispersions of elementary
excitations
究所

Taku J Sato

Tohoku University

35

歪んだ籠目格子遍歴磁性体 Yb3Ru4Al12 の磁気構
佐藤
造

卓

東北大学

多元物質科学研 Magnetic order in the 2D itinerant breathing kagome
compound Yb3Ru4Al12
究所

Taku J Sato

Tohoku University

36

近藤半金属におけるワイルフェルミオンの磁気
状態

岩佐

和晃

茨城大学

フロンティア応
用原子科学研究 Magnetic states of Weyl fermion in Kondo semimetals
センター

Kazuaki Iwasa

Ibaraki University

37

T' 構造銅酸化物 Pr2-xCaxCuO4 における磁気相関藤田と超伝導の研究全基

東北大学

金属材料研究所

Study of spin correlations and superconductivity in T'structured cuprate oxide Pr2-xCaxCuO4

Masaki Fujita

Tohoku University38

量子スピン液体の研究

門脇広明

首都大学東京理工学研究科物
Quantum spin liquid
理学専攻

Hiroaki Kadowaki

Tokyo Metoropolitan
University

39

希土類元素を含むフラストレート系金属間化合物の中性子非弾性散乱実験による研究

植田大地

沖縄科学技術大 量子物質科学ユ Study of dimer structure in frustrated Kondo compounds
Ce5Si3 and Ce5Ga2Ge
学院大学
ニット

Daichi Ueta

Okinawa Institute of
Science and Technology
Graduate University

40

YIG におけるマグノンポーラロン誘起反交差ギ
ャップ

南部

雄亮

東北大学

金属材料研究所 Magnon polaron induced anticrossing gap in YIG

Yusuke Nambu

Tohoku University

41

SANS-U（二次元位置測定小角散乱装置）IRT 課
柴山
題

充弘

東京大学

物性研究所

Mitsuhiro Shibayama The university of tokyo

42

極めて均一な高分子ゲルの一軸伸張時の網目構
造の評価

Li

Xiang

東京大学

物性研究所中性 Investigation of network structure of extremely homogeneous
子科学研究施設 gel under uniaxial elongation

Xiang LiThe University of
Tokyo

43

一軸伸長下における重水素化ラベリングを用いた ゲル内の高分子鎖の挙動

Li

Xiang

東京大学

物性研究所中性 Deuterated polymer chain behavior in gel under uniaxial
子科学研究施設 deformation

Xiang LiThe University of
Tokyo

44

小角中性子散乱とセグメント重水素化によるマルチドメインタンパク質のドメイン運動の可視
化

井上

倫太郎

京都大学

Visualization of domain motion of multi-domain protein
複合原子力科学through segment deuteration and small-angle neutron研究所
scattering

Rintaro Inoue

Kyoto University45

磁性準結晶中の隠れた磁気秩序の探索

佐藤

卓

東北大学

多元物質科学研
Hidden magnetic order in magnetic quasicrystals
究所

Taku J Sato

Tohoku University

IRT project of HER

・申請装置 C1-2: SANS-U
IRT project of SANS-U

134
ISSP Activity Report 2019

No.

課題名

氏名

所属

46

中性子小角散乱実験による Sr2RuO4 の異常金属
状態の研究

古川

はづき

お茶の水女子大 基幹研究院 自学
然科学系

Anomalous vortex state in Sr2RuO4 studied by SANS
experiments

Hazuki Furukawa

Ochanomizu
University47

空間反転対称性の破れた超伝導体のヘリカル磁束格子の観測古川

はづき

お茶の水女子大 基幹研究院 自学
然科学系

Herical vortex phase on non-centrosymmetric superconductors Hazuki Furukawa

Ochanomizu
University

48

強磁性超伝導体における自発的磁束格子構造の
研究

古川

はづき

お茶の水女子大 基幹研究院 自学
然科学系

Spontaneous vortex phase in ferromagnetic superconductors

Hazuki Furukawa

Ochanomizu
University

49

トポロジカル超伝導体の磁束格子

古川

はづき

お茶の水女子大 基幹研究院 自学
然科学系

Vortex phase in topological superconductors

Hazuki Furukawa

Ochanomizu
University

50

生体適合性ポリオリゴエチレングリコールメタ
クリレートゲルの微細構造変化の調査

呉羽

拓真

東京大学

物性研究所

Investigation of Changes in the Microscopic Structure ofPoly(oligo ethylene glycol methacrylate)-based Hydrogels.

Takuma Kureha

The University of
Tokyo

51

Phase diagram of the moving magnetic
skyrmion lattice with plastic deformation in
MnSi under high electric current

奥山

大輔

東北大学

多元物質科学研 Phase diagram of the moving magnetic skyrmion lattice withplastic deformation in MnSi under high electric current
究所

Daisuke Okuyama

Tohoku University

52

完全に単分散な逆ミセルの構造可視化藤井翔太

北九州市立大学 環境技術研究所 Structural analysis of perfectly monodisperse reverse micelles

Shota Fujii

The University of
Kitakyushu

53

SANS 測定による分子透過性ベシクルのpoly(propylene oxide) 層中の水和量の決定

西村

智貴

京都大学

Elucidating the degree of hydration of the poly (propylene
工学研究科 高oxide) block in carbohydrate-b-poly(propylene oxide) block分子化学専攻
copolymer vesicle membranes by SANS measurements

Tomoki Nishimura

Kyoto University

54

界面不活性の働きをする界面活性剤

貞包

浩一朗

同志社大学

生命医科学部医Surfactant molecules behaving as a surface-inactive agent
情報学科

Koichiro Sadakane

Doshisha University

55

高圧条件下における 2 成分混合溶液の新奇な臨
界挙動

貞包

浩一朗

同志社大学

生命医科学部医 Novel critical behavior in a mixture of water / organic solvent
under high-pressure condition
情報学科

Koichiro Sadakane

Doshisha University

56

イミダゾリウム系イオン液体中におけるエタノールクラスターの形成

高椋

利幸

佐賀大学

理工学部

57

中性子小角散乱によるマルチドメイン蛋白質の溶液構造解析

中川洋

日本原子力研究 階層構造研究グ Analysisi of solution structure of multi-domain protein by
SANS
開発機構
ループ

Title

Formation of Ethanol Clusters in Imidazolium-based Ionic
Liquids

Name

Organization

Toshiyuki Takamuku Saga University
Hiroshi Nakagawa

Japan Atomic Energy
Agency・申請装置 C2-3-1: iNSE
東京大学

物性研究所中性
IRT project of iNSE
子科学研究施設

Xiang LiThe University of
Tokyo

正明

京都大学

複合原子力科学 Investigation on tri-ubiquitin dynamics associated withconfigurations of interaction interfaces研究所

Masaaki Sugiyama

Kyoto University

貞包

浩一朗

同志社大学

生命医科学部医Surfactant molecules behaving as a surface-inactive agent
情報学科

Koichiro Sadakane

Doshisha University

中川洋

日本原子力研究 階層構造研究グ Analysis of relationship between structural dynamics andfunction of multi-domain protein
開発機構
ループ

Hiroshi Nakagawa

Japan Atomic Energy
Agency58

iNSE（中性子スピンエコー分光器 )IRT 課題

Li

Xiang

59

相互作用面の配向に連動したトリユビキチンダ
イナミクスの研究

杉山

60

界面不活性の働きをする界面活性剤

61

マルチドメイン蛋白質の動的構造と機能発現との関係性の解析

No.

課題名

氏名

62

Mn1-xFexSi におけるスキルミオンのダイナミク
ス

左右田

稔

63

リン脂質膜の粘弾性に対するモデルスクランブ
ラーゼペプチドの影響

中尾

所属

Title

Name

Organization

理化学研究所

創発物性科学研
dynamics of skyrmion of Mn1-xFexSi
究センター

裕之

富山大学

大学院医学薬学 Effect of a model scramblase peptide on viscoelastic properties
Hiroyuki Nakao
of phspholipid bilayers
研究部

University of Toyama

Minoru Soda

RIKEN

・申請装置 C3-1-1: AGNES
64

AGNES（高分解能パルス冷中性子分光器）IRT
課題

山室

修

東京大学

物性研究所

IRT project of AGNES

Osamu Yamamuro

The University of
Tokyo

65

PdPt 合金ナノ粒子中の水素の速いダイナミクス

山室

修

東京大学

物性研究所

Fast dynamics of hydrogen atoms in PdPt alloy nanoparticles

Osamu Yamamuro

The University of
Tokyo

66

PdPt 合金ナノ粒子中の水素の遅いダイナミクス

山室

修

東京大学

物性研究所

Slow dynamics of hydrogen atoms in PdPt alloy nanoparticles

Osamu Yamamuro

The University of
Tokyo

67

高水素密度・高 Li 伝導物質 Li5MoH11 中の水素の速いダイナミクス

山室

修

東京大学

物性研究所

Fast dynamics of Li5MoH11 with high hydrogen-density andhigh lithium conductivity

Osamu Yamamuro

The University of
Tokyo

68

高水素密度・高 Li 伝導物質 Li5MoH11 中の水素の遅いダイナミクス

山室

修

東京大学

物性研究所

Slow dynamics of Li5MoH11 with high hydrogen-density andhigh lithium conductivity

Osamu Yamamuro

The University of
Tokyo

69

超高エントロピー液体・アルキル化パーフルオ
ロベンゼンの遅いダイナミクス

山室

修

東京大学

物性研究所

Slow dynamics of super-high entropy liquids alkylated
perfluorobenzenes

Osamu Yamamuro

The University ofTokyo・申請装置 C3-1-2: MINE1

ISSP Activity Report 201970

MINE1（京大複合研：多層膜中性子干渉計・反射率計）IRT 課題

日野

正裕

京都大学

複合原子力科学
MINE1 (Multilayer neutron interferometer and reflectmeter)研究所

Masahiro Hino

Kyoto University71

MINE2（京大複合研：多層膜中性子干渉計・反射率計）IRT 課題

日野

正裕

京都大学

複合原子力科学MINE2 (Multilayer neutron interferometer and reflectmeter)研究所

Masahiro Hino

Kyoto University72

高分子 / 水界面における生体分子の吸着状態の解
松野
析

寿生

九州大学

Analyses of adsorbed biomolecules at the polymer/waterinterface

Hisao Matsuno

Kyushu University

73

混合液体中における高分子薄膜の膨潤挙動

田中

敬二

九州大学

Swelling Behavior of Polymer Thin Films in Mixed Nonsolvents

Keiji Tanaka

Kyushu University

Ibaraki University

大学院工学研究
院 応用化学部門（機能）
大学院工学研究
院 応用化学部
門

・申請装置 T1-1: HQR

135

74

HQR( 高分解能中性子散乱装置 )IRT 課題

大山

研司

茨城大学

理工学研究科IRT project of HQR

Kenji Ohoyama

75

Rb2MoO4 における多形転移とソフトフォノン

重松

宏武

山口大学

教育学部

Polymorph Transition and Soft Phonon in Rb2MoO4

Hirotake Shigematsu Yamaguchi University

136

No.

課題名

氏名

所属

Title

Name

Organization

ISSP Activity Report 2019

Establishment of the unified explanation about the phasetransition mechanism (displacive and orderdisorder type) in
Ferroelectrics

Hirotake Shigematsu Yamaguchi University

Magnetic correlation at Wannier point in isosceles-triangularlattice Ising magnet CoNb2O6

Setsuo Mitsuda

Tokyo University of
Science

Masaki Fujita

Tohoku University

Masaki Fujita

Tohoku University

産業技術総合研 省エネルギー研
Spin fluctuations of iron-based superconductors
究所
究部門

Chul-Ho Lee

National Institute ofAdvanced Industrial
Science and Technology

雄亮

東北大学

金属材料研究所 IRT project of HERMES

Yusuke Nambu

Tohoku University76

強誘電体の相転移機構（変位型及び秩序−無秩序重松型）に関する統一的理解の確立

宏武

山口大学

教育学部

77

2 等辺三角格子 Ising 磁性体 CoNb2O6 のワニエ
点における磁気相関

満田節生

東京理科大学

理学部

物理・申請装置 T1-2: AKANE
78

AKANE（東北大金研：三軸型中性子分光器 ）IRT 課題

藤田

全基

東北大学

金属材料研究所 IRT project of AKANE

79

T' 構造銅酸化物 Pr2-xCaxCuO4 における磁気相関藤田と超伝導の研究全基

東北大学

金属材料研究所

80

鉄系超伝導体のスピン揺動李哲虎Study of spin correlations and superconductivity in T'structured cuprate oxide Pr2-xCaxCuO4・申請装置 T1-3 HERMES81

HERMES（東北大金研：中性子粉末回折装置）
IRT 課題82

歪んだ籠目格子遍歴磁性体 Yb3Ru4Al12 の磁気構
佐藤
造

卓

東北大学

多元物質科学研 Magnetic order in the 2D itinerant breathing kagome
compound Yb3Ru4Al12
究所

Taku J Sato

Tohoku University

83

Ga-Pd-Tb 2/1 近似結晶の磁気構造

佐藤

卓

東北大学

多元物質科学研 Neutron-diffraction study on antiferromagnetic structure in the
Taku J Sato
Ga-Pd-Tb 2/1 quasicrystalline appoximant
究所

Tohoku University84

反転対称性の破れた 1 次元反強磁性体
Cu2(MoO4)(SeO3) の磁気構造

佐藤

卓

東北大学

多元物質科学研 Magnetic structure of noncentrosymmetric 1D antiferromagnet
Taku J Sato
Cu2(MoO4)(SeO3)
究所

Tohoku University

85

Majumdar-Ghosh 物質の中性子粉末回折

南部

雄亮

東北大学

金属材料研究所

Neutron powder diffraction study on a Majumdar-GhoshsystemYusuke Nambu

Tohoku University

86

PdRuRh ナノ粒子の構造と触媒活性

山室

修

東京大学

物性研究所

Structure and catalytic activity of PdRuRh alloy nanoparticles

Osamu Yamamuro

University of Tokyo87

二重 K2NiF4 型 (La1/2Sr1/2)4MnCoO8 と(La1/2Sr1/2)4MnNiO8 における強磁性とカチオン 山本
オーダー

孟

東北大学

多元物質科学研 Ferromagnetism and cation-ordering in double-K2NiF4-type(La1/2Sr1/2)4MnCoO8 and (La1/2Sr1/2)4MnNiO8
究所

Hajime Yamamoto

Tohoku University

88

正方晶 Mn 化合物における過剰 Mn の結晶構造
特性と磁気特性岡田宏成

東北学院大学

工学部

89

近藤半金属におけるワイルフェルミオンの磁気
状態

岩佐

和晃

茨城大学

フロンティア応
用原子科学研究 Magnetic states of Weyl fermion in Kondo semimetals
センター

Kazuaki Iwasa

Ibaraki University

90

EuTGe3 (T=Rh, Ir) の磁気構造

松村

武

広島大学

大学院先端物質
Magnetic Structure of EuTGe3 (T=Rh, Ir)
科学研究科

Takeshi Matsumura

Hiroshima University

南部

Structural and Magnetic properties of excess Mn in Tetragonal
Hironari Okada
Mn CompoundTohoku Gakuin
University

No.

課題名

氏名

所属

91

新規酸化物イオン伝導体の結晶構造解析とイオ
ン伝導経路の解明

藤井孝太郎

東京工業大学

理学院化学系

Crystal Structure Analysis and Investigation of Ion Diffusion
Path of Novel Oxide-Ion Conductors

Kotaro Fujii

Tokyo Institute ofTechnology

92

T' 構造銅酸化物の超伝導発現と結晶構造の関係

藤田

全基

東北大学

金属材料研究所

Relation between superconducting mechanism and crystal
structure in T’ cuprate oxide

Masaki Fujita

Tohoku University

93

量子臨界点近傍にある YbCo2Zn20 の置換系試料
阿曽の結晶構造と磁気構造

尚文

琉球大学

理学部物質地球 Crystal and magnetic structures in doped systems of
YbCo2Zn20 in vicinity of a quantum critical point
科学科

Naofumi Aso

University of the
Ryukyus94

電気磁気交差相関現象を示す重い電子系反強磁性体 Ce3TiBi5 の磁気構造

阿曽

尚文

琉球大学

Magnetic structure in a heavy fermion antiferromagnet
理学部物質地球
Ce3TiBi5 exhibiting electromagnetic cross-correlation
科学科
phenomenon

Naofumi Aso

University of the
Ryukyus95

擬一次元梯子格子鉄系化合物の磁気構造解析

青山

拓也

東北大学

理学研究科物理 Magnetic structure analysis of quasi one-dimensional ladderlattice iron compound
学専攻

Takuya Aoyama

Tohoku University

96

新しい層状コバルト酸化物の磁気構造

山田幾也

大阪府立大学

大学院工学研究
Magnetic structures of novel layered cobalt oxides
科

Ikuya Yamada

Osaka Prefecture
University

Hiroyuki Kimura

Tohoku University

Title

Name

Organization

・申請装置 T2-2: FONDER

ISSP Activity Report 2019

97

FONDER( 中性子 4 軸回折装置 )IRT 課題

木村

宏之

東北大学

多元物質科学研
IRT proposal for FONDER (Neutron 4-circle diffractometer)
究所

98

量子スピンの三量体構造をもつ Na2Cu3Ge4O12の単結晶による磁気構造解析

安井

幸夫

明治大学

理工学部

Magnetic Structure analysis of S=1/2 linear trimer system
Na2Cu3Ge4O12 single-crystal

Yukio Yasui

Meiji University99

塑性歪みを加えた Pt3Fe 反強磁性体における強磁性の発現機構

小林

悟

岩手大学

理工学部

Mechanism of ferromagnetism in plastically deformed Pt3Fe
antiferromagnet

Satoru Kobayashi

Iwate University100

マルチフェロイック Tb0.5Gd0.5Mn2O5 における木村
磁気構造と強誘電性の研究

宏之

東北大学

多元物質科学研 Magnetic structure and its relevance to the ferroelectricity inmultiferroic Tb0.5Gd0.5Mn2O5
究所

Hiroyuki Kimura

Tohoku University

宏之

東北大学

多元物質科学研 Oxygen reduction effect on the crystal structure in the T’-structure of Pr2CuO4+y
究所

Hiroyuki Kimura

Tohoku University

美和子

筑波大学

数理物資系

Commensurate-Incommensurate Magnetic Phase Transition in
Miwako Takahashi
Type-III Anti-ferromagnet Pt-Mn

Tsukuba University

美也

東京大学

物性研究所

IRT project of Accessory

The University ofTokyo

101 T'-type Pr2CuO4 における結晶構造の還元効果
102

木村

typeIII 型反強磁性体 Pt-Mn における整合ー非整高橋
合磁気相転移・申請装置 Accessory
103 アクセサリー IRT 課題

上床

Yoshiya Uwatoko

137

138

令和元年度 軌道放射物性研究施設 共同利用課題一覧 / Joint Research List of Syncrotron Radiation Researcher 2019
播磨分室

BL07LSU / Harima Branch BL07LSU

ISSP Activity Report 2019

No.

課題名

氏名

所属

1

高エネルギー密度二次電池正極材料のオペラン
ド軟 X 線発光分光

朝倉大輔( 国 ) 産業技術総合研究所

省エネルギー研 Operando soft x-ray emission spectroscopy of rechargeablebattery cathode materials with high energy density
究部門

Daisuke Asakura

National Institute ofAdvanced Industrial
Science and Technology

2

全固体リチウムイオン電池を用いたオペランド
軟 X 線発光分光測定の開発

朝倉大輔( 国 ) 産業技術総合研究所

省エネルギー研 Development of operando soft X-ray emission spectroscopy by
Daisuke Asakura
use of all-solid-state Li-ion battery
究部門

National Institute ofAdvanced Industrial
Science and Technology

3

銅酸化物超伝導体 Pr1.4-xLa0.6CexCuO4 における
石井
２キャリア状態の検証

賢司

量子科学技術研 放射光科学研究 Verification of two-carrier state in the cuprate superconductors
Kenji Ishii
Pr1.4-xLa0.6CexCuO4
究開発機構
センター

4

磁場中共鳴非弾性軟 X 線散乱（SX-RIXS）による Co2FeSi および Mn2VAl ホイスラー合金単結晶のスピン偏極電子状態の研究

梅津

5

高分解能軟 X 線発光分光によるスピネル型正極
材料の酸素レドックス反応の解明

大久保

6

アルカリイオン脱挿入による遷移金属酸化物の機能制御と電子状態との関連性の解明

大久保

7

水素結合状態解析が導くレドックスフロー電池の溶媒和・脱溶媒和エネルギーの解明

大平8

PbS 量子ドット太陽電池における光励起キャリアの動的挙動に及ぼすサイズ効果と保護層の検
証

9
10

Title

Name

Organization

National Institute forQuantum and Radiological
Science and Technology

東北大学

Spin-polarized electronic state of single crystal Co2FeSi and
金属材料研究所 Mn2VAl Heusler alloys probed by resonant inelastic soft X-ray
scattering (SX-RIXS) in magnetic field

將史

東京大学

工学系研究科將史

東京大学

工学系研究科昭博( 国 ) 産業技術総合研究所

省エネルギー研 Study on the local hydrogen bond of water to resolve the freeenergy of solvation and desolvation in redox flow batteries
究部門

Akihiro Oohira

National Institute ofAdvanced Industrial
Science and Technology

小澤健一

東京工業大学

Effect of size and capping layers of PbS quantum dots
大学院理工学研
on photoexcited carrier dynamics in PbS quantum dot
究科
photovoltaic cell

Kenichi Ozawa

Tokyo Institute ofTechnology

硫化サマリウム SmS の光誘起価数転移の観測

木村

真一

大阪大学

大学院生命機能 Direct observation of photo-induced valence transition ofsamarium monosulfide SmS
研究科

Shinichi Kimura

Osaka University

イットリウムドープ硫化サマリウムの温度・光誘起価数転移の観測

木村

真一

大阪大学

大学院生命機能 Direct observation of thermal- and photo-induced valencetransition of yttrium-doped samarium monosulfide Sm1-xYxS
研究科

Shinichi Kimura

Osaka University

分子科学研究所

物質分子科学研 Low-temperature methane oxidative coupling on modified Pdmodel catalysts studied by operando AP-XPS
究領域

Takanori Koitaya

Institute for Molecular
Science

Masaki Kobayashi

The University ofTokyo

表面修飾パラジウムモデル触媒を用いた低温メ
11 タン酸化カップリング反応のオペランド雰囲気
光電子分光測定

理恵

小板谷

貴典

Rie Umetsu

Clarification of the oxygen redox reaction in spinel-type
cathode materials by high-energy-resolution soft x-ray emission Masashi Okubo
spectroscopy
Investigation of relationship between the electronic structureand functionality in transition-metal oxides controlled by
Masashi Okubo
alkali-ion insertion/extraction

Tohoku University
The University ofTokyo
The University ofTokyo

n 型鉄系強磁性半導体におけるスピン偏極電荷移
小林
動の検証

正起

東京大学

大学院工学系研 Configulation interaction in iron-based ferromagnetic
semiconductors
究科

X 線スペクトルイメージングによる p+-WSe2/
13 n-MoS2 ヘテロ接合 TFET デバイス構造における 永村
接合界面の電子状態解明

直佳（国）物質・材料研究機構

高エネルギー光 Investigation of local interface states in p+-WSe2/n-MoS2 hetero
Naoka Nagamura
junctions in TFET device structure
解析グループNational Institute forMaterials Science14

生体親和性高分子中の中間水の性質解明に向けた軟 X 線吸収・発光分光解析

西村

慎之介

九州大学

先導物質化学研 Soft X-ray absorption and emission spectroscopy of theintermediate water in biocompatible polymers
究所

Kyushu University

15

サイト選択・時分割光電子ホログラフィーの確
立とシリセン形成過程の観測

林

12

好一

名古屋工業大学 物理工学科

Shinnosuke
Nishimura

Development of site-selective and time-resolved photoelectron
holography and its application to the structural observation of Kouichi Hayashi
silicene formation

Nagoya Institute ofTechnology

No.

課題名

氏名

所属

Title

Name

Organization

サイト選択及び時間分解光電子ホログラフィー
16 によるシリセンの形成・相転移過程の原子レベ
ル構造観察

林

好一

名古屋工業大学 物理工学科

Atomic level structural observation of formation and phasetransition of silicence using site-selective and time-resolved
photoelectron holography17

原子レベルで制御されたモデル生体適合性有機分子表面上の界面水の電子状態観測林智広

東京工業大学

物理工学院

Analysis of the electronic structure of interfacial water formed
Tomohiro Hayashi
on model biocompatible organic surfaces

Tokyo Institute ofTechnology

18

高速偏光スイッチングを利用した金属 Fe の磁気
平田
光学定数の膜厚依存性の測定

靖透

東京大学

物性研究所

Measurement of the thickness dependence of the magnetoptical constants of metal Fe using fast polarization switching

Yasuyuki Hirata

The University of
Tokyo

19

高速偏光スイッチングを利用した磁気光学測定
による金属 Co の複素誘電率の決定

平田

靖透

東京大学

物性研究所

Determination of the complex permittivity of Co metal by
Yasuyuki Hirata
magneto-optical measurement using fast polarization switching

The University of
Tokyo

20

多次元オペランド X 線光電子分光の創出 (I)
官学連携モデル試料の選定

吹留

博一

東北大学

21

顕微共鳴光電子分光による全個体 Li イオン電池
正極材料のオペランド測定細野英司( 国 ) 産業技術
総合研究所

22

硫化物固体電解質を用いた単結晶 LiNixCoyAlzO2
細野の顕微光電子マッピング測定英司( 国 ) 産業技術総合研究所

省エネルギー研 Micro-XPS mapping measurement of single crystalline
LiNixCoyAlzO2/sulfide-based solid-state electrolyte
究部門

宮脇

淳

東京大学

物性研究所

24

マグノニクス物質の SX-RIXS と散乱 X 線の偏光
宮脇
解析

淳

東京大学

25

SX-RIXS と X 線偏光歳差分光によるマグノンのオペランド観測宮脇淳

26

時分割コヒーレント軟 X 線回折イメージングによる超高速磁気ダイナミクス研究山崎

27

軟 X 線発光分光による高容量正極材料のアニオ
ンレドックスの解明

産Creation of multi-dimensional operando photoelectron
電気通信研究所 spectroscopy (I) Selection of industry-government-academia
collaborative model sample
Operando measurement of cathode materials for all-solid省エネルギー研
state-lithium ion batteries by resonant X-ray photoemission
究部門
microspectroscopy

Kouichi Hayashi

Nagoya Institute ofTechnology

Hirokazu Fukidome

Tohoku University

Eiji Hosono

National Institute ofAdvanced Industrial
Science and Technology

Eiji Hosono

National Institute ofAdvanced Industrial
Science and Technology

Soft X-ray inelastic scattering and diffraction techniquesapplied for the study on the role of water and hydration in
biopolymers, polysaccharides and electrolytes

Jun Miyawaki

The University of
Tokyo

物性研究所

SX-RIXS and Polarization Analysis of Scattered X-ray of
Magnonic Materials

Jun Miyawaki

The University of
Tokyo

東京大学

物性研究所

Operando observation of magnon by SX-RIXS and X-ray
polarization precession spectroscopy

Jun Miyawaki

The University of
Tokyo

裕一

（国）物質・材料研究機構

統合型材料開Ultra-fast magnetic dynamics revealed by time-resolved
発・情報基盤部
coherent soft x-ray diffraction imaging
門

Yuichi Yamasaki

National Institute forMaterials Science藪内直明

横浜国立大学

大学院理工学府

Investigation of the anion redox chemistry in high-capacity
cathode materials by soft X-ray emission spectroscopy

Naoaki Yabuuchi

Yokohama National
University

生体親和性ポリマー中の中間水および Li 過剰系
28 正極の酸素レドックスにおける酸素の電子状態
解析

山添

康介

東京大学

物性研究所

Electronic State analysis of oxygen in intermediate waterin biocompatible polymers and positive electrode includingexcess lithium in Li ion battery by XAS and RIXS

Kosuke Yamazoe

The University ofTokyo

プラズモン増強サバティエ反応の時間分解オペ
ランド軟 X 線分光観測

山本

達

東京大学

物性研究所

Plasmon-enhanced Sabatier reaction studied by time-resolved
Operando soft X-ray spectroscopy

Susumu Yamamoto

The University ofTokyo

新規時間分解 X 線吸収分光法による光触媒材料
30 における非占有状態キャリアダイナミクスの解
明

山本

達

東京大学

物性研究所

Unoccupied states carrier dynamics in photocatalytic
materials revealed by a novel time-resolved X-ray absorption
spectroscopy

Susumu Yamamoto

The University of
Tokyo

31

ルテニウム酸化物の電場印加下軟 X 線吸収・発
光分光

吉田

鉄平

京都大学

大学院人間・環 Soft x-ray absorption and emission studies of Rutheniumoxides under electric field
境学研究科

Teppei Yoshida

Kyoto University

32

オペランド XPS による単原子合金 Pd-Cu モデル
吉信
触媒における CO2 水素化反応の研究

淳

東京大学

大学院新領域創 Operando XPS study of CO2 hydrogenation on a single-atomalloy Pd-Cu model catalyst
成科学研究科Jun Yoshinobu

The University ofTokyo

軟 X 線非弾性散乱、非弾性回折を用いた生体高
23 分子や多糖、電解液における水の役割と水和水の電子状態の研究

ISSP Activity Report 2019

29

139

140

No.

課題名

33

雰囲気 XPS によるナノ合金粒子および金属ヒド
リド錯体の電子状態の研究

氏名
吉信

淳

所属
東京大学

ISSP Activity Report 2019

Name

Organization

大学院新領域創 AP-XPS study of Electronic states of metal nano particles andmetal hydride complex
成科学研究科Jun Yoshinobu

The University ofTokyoTime resolved XAS study on the charge carrier dynamics on
photoelectrodes in nanoseconds regions

Frank de Groot

Utrecht University

Investigation of the Iron Doping Role in Cobalt Oxide Water
Oxidation Catalysts using Co 2p3d RIXS

Olaf Ruediger

Max Plank Institutefor Chemical Energy
Conversion

Investigation of Cobalt Oxide Electrodeposited Self-Repair
Thin Films for Water OxidationCatalysts using Co 2p3d RIXS

Olaf Ruediger

Time resolved XAS study on the chargeFrank deUtrecht
34 carrier dynamics on photoelectrodes in
Groot
University
nanoseconds regions
Max Plank Institute
Investigation of the Iron Doping Role in
35 Cobalt Oxide Water Oxidation Catalysts using Olaf Ruediger for Chemical Energy
Conversion
Co 2p3d RIXS
Max Plank Institute
Investigation of Cobalt Oxide Electrodeposited
36 Self-Repair Thin Films for Water
Olaf Ruediger for Chemical Energy
Conversion
OxidationCatalysts using Co 2p3d RIXS

Title

Max Plank Institutefor Chemical Energy
Conversion

柏キャンパス E 棟 / Laser and Synchrotron Research Laboratory in Kashiwa
No.

課題名

氏名

所属

1

スピン分解角度分解光電子分光による V2AlC のスピン偏極状態の研究

伊藤

孝寛

名古屋大学

2

スピン分解角度分解光電子分光による層状 MAX
伊藤
層化合物のスピン偏極状態の研究

孝寛

名古屋大学

3

半導体基板上の金属的擬一次元表面状態におけるフェルミ準位近傍のスピン偏極構造

大坪

嘉之

大阪大学

生命機能研究科4

有機半導体の分子吸着に伴って生じるトポロジ
カル表面状態の変化

金井要

東京理科大学5

トポロジカル絶縁体を用いたスピン軌道トルク
磁気メモリの表面状態解明

小林

正起

6

トポロジカル絶縁体 Bi1-xSbx と垂直磁化膜
MnGa 界面におけるディラックコーンの観測小林

7

Investigation of topological properties insuperconducting TaSe3

Name

Organization

Spin- and angle-resolved photoemission study of spin-polarized
Takahiro Itoelectronic structure of V2AlC

Nagoya University

Spin- and angle-resolved photoemission study of spin-polarized
Takahiro Itoelectronic structure of nanolamellar MAX phase compounds

Nagoya University

Spin texture of the metallic quasi-1D surface states aroundFermi level fabricated on semiconductor substrates

Yoshiyuki Ohtsubo

Osaka University

大学院理工学研 Modification of Topological surface states upon adsorption oforganic semiconductors
究科

Kaname Kanai

Tokyo University of
Science

東京大学

大学院工学系研 Unveiling the surface state of spin-orbital torque magnetic
memory using topological insulator
究科

Masaki Kobayashi

The University of
Tokyo

正起

東京大学

Obsevation of Dirac cone state at the interface between
大学院工学系研
topological insulator Bi1-xSbx and perpendicular magnet MnGa Masaki Kobayashi
究科
layersThe University of
Tokyo

近藤

猛

東京大学

物性研究所

Investigation of topological properties in superconducting
TaSe3

Takeshi Kondo

The University of
Tokyo

8

第二種 Weyl 半金属 WTe2 の角度とスピン分解光
近藤
電子分光による研究

猛

東京大学

物性研究所

The angle- and spin-resolved photoemission spectroscopy
research on type-II Weyl semimetal WTe2

Takeshi Kondo

The University of
Tokyo

9

2 次元ファンデルワールス強磁性体のスピン・角黒田
度分解電子分光による研究

健太

東京大学

物性研究所

Spin- and angle-resolved photoemission spectroscopy study of
two dimensional van der Waals ferromagnets

Kenta Kuroda

The University ofTokyo

Development of time-, spin- and angle-resolved photoemission
Kenta Kuroda
spectroscopy machine

The University ofTokyo

シンクロトロン
光科学研究センター
シンクロトロン
光科学研究センター

Title

10 時間・スピン・角度分解光電子分光装置の開発

黒田

健太

東京大学

物性研究所

11 トポロジカル超伝導体の探索

坂野

昌人

東京大学

大学院工学系研Search for topological insulators
究科

Masato Sakano

The University of
Tokyo

No.

課題名

氏名

所属

Title

Name

Organization

12 Study of the effect of excess Fe in Fe(Te,Se)

Peng Zhang

東京大学

物性研究所

Study of the effect of excess Fe in Fe(Te,Se)

Peng Zhang

The University ofTokyo

13 Study of topological states in ZrTe5

Peng Zhang

東京大学

物性研究所

Study of topological states in ZrTe5

Peng Zhang

The University of
Tokyo

東京大学

物性研究所

SARPES study of spin-polarized electronic states of a Pb
atomic laye

Koichiro Yaji

The University of
Tokyo

14

鉛単原子層のスピン偏極電子状態のスピン分解
光電子分光

矢治

15

High-resolution spin-resolved electronic
structure of 2D electron gas in SrTiO3

AndresSantander

Paris-Sud
University

High-resolution spin-resolved electronic structure of 2D
electron gas in SrTiO3

Andres Santander

Paris-Sud University

16

ドメイン制御された合金原子層のスピン構造研
究

Shu-Jung
Tang

Tsing Hua
Univ.

Study of spin structure in domain-regulated alloy of atomic
layer

Shu-Jung Tang

Tsing Hua University

Rolalnd
StaniaInstitute for
Basic Science

SARPES study of band structure at the interfaces between
bismuth and transition metal dichalcogenides

Rolalnd Stania

Institute for Basic
Science

福谷

Institute for
Basic Science

High-resolution spin- and angle-resolved photoemission
spectroscopy of doped magnetic topological insulators

Keisuke Fukutani

Institute for Basic
Science

SARPES study of band structure at the
17 interfaces between bismuth and transition
metal dichalcogenides
18

ドープされた磁性トポロジカル絶縁体における高分解能スピン・角度分解光電子分光

光一郎

圭祐

ISSP Activity Report 2019

141

142

令和元年度 スーパーコンピュータ共同利用課題一覧 / Joint Research List of Supercomputer System 2019
No.

課題名

氏名

所属

Title

Name

Organization

ISSP Activity Report 2019

1. 第一原理計算 / First‒Principles Calculation of Materials Properties1

量子論による半導体界面形成機構と電子物性の
解明

押山

淳

名古屋大学未来材料・システム研 Mechanisms of Semiconducotr Interface Formation and its
Electronic Properties based on Quantum Theory
究所

Atsushi Oshiyama

Nagoya University2

量子論による半導体界面形成機構と電子物性の
解明

押山

淳

名古屋大学未来材料・システム研 Mechanisms of Semiconducotr Interface Formation and its
Electronic Properties based on Quntum Theory
究所

Atsushi Oshiyama

Nagoya University

3

高機能スピントロニクス磁性材料の電子構造解
析および磁気的性質解析

小田竜樹

金沢大学理工研究域数物科学系

Analyses on electronic structure and magnetic property inhigh-performance spintronics and magnetic materials

Tatsuki Oda

Kanazawa University

4電極界面の物理杉野修

東京大学物性研究所

Physics of electrode interfaces

Osamu Sugino

The University of
Tokyo

5

最強希土類永久磁石化合物 (Nd, R)2(Fe,Co)14B
松本(R= 希土類 ) の第一原理磁気物性最適化

宗久

高エネルギー加速器研究機構 物質構造科学研究所

Ab initio optimization of the champion rare earth magnet
compound (Nd,R)2(Fe,Co)14B (R=rare earth)

Munehisa
MatsumotoKEK

6

高機能スピントロニクス磁性材料の電子構造解
析および磁気的性質解析

小田竜樹

金沢大学理工研究域数物科学系

Analyses on electronic structure and magnetic property inhigh-performance spintronics and magnetic materials

Tatsuki Oda

Kanazawa University

7

先端的第一原理シミュレーションによる物質開
拓

常行

真司

東京大学大学院理学系研究科

Material exploration by advanced first-principles simulation

Shinji Tsuneyuki

The University of
Tokyo

8

BaZrO3 系イオン伝導体のドーピングスキーム設
笠松
計

秀輔

山形大学学術研究院

Designing doping schemes for BaZrO3-based ion conductors

Shusuke Kasamatsu

Yamagata University

9

次世代二次電池界面・電解液に関する第一原理
サンプリング研究館山佳尚

物質・材料研究機構

DFT-MD sampling analysis of interfaces and electrolytes innovel batteries

Yoshitaka Tateyama

National Institute forMaterials Science10

超並列量子物質計算とデータ駆動科学の融合

星

鳥取大学大学院工学研究科

Unification of massively parallel quantum material simulationand data-driven science

Takeo Hoshi

Tottori University

11

パワー半導体における界面欠陥構造の特定とその低減法の提案 : 第一原理計 算からのアプロー
チ

松下

雄一郎

東京工業大学

Identification of interface-state defects in power
semiconductors: Approach from ab-initio calculations

Yu-Ichiro Matsushita

Tokyo Institute ofTechnology

12

有限温度フォノン計算に基づく構造相転移の理
解と予測

只野

央将

物質・材料研究機構

Predicting and understanding structural phase transition ofsolids from finite-temperature phonon calculations

Terumasa Tadano

National Institute forMaterials Science13

ファンデルワールス密度汎関数を用いた分子吸着金属表面の研究

濱田幾太郎

大阪大学工学研究科

van der Waals density functional study of molecules adsorbed
on metal surfaces

Ikutaro Hamada

Osaka University14

密度汎関数法と溶液理論を用いた電気化学反応
の解析

春山

潤

東京大学物性研究所

Electrochemical reaction analysis using density functional
calculation + implicit solvation modelJun Haruyama

The University of
Tokyo

15

表面、界面、欠陥における原子構造と原子ダイ
ナミクスの解析渡邉聡

東京大学大学院工学系研究科

Analyses of atomic structures and atom dynamics at surfaces,interfaces and defects

Satoshi Watanabe

The University of
Tokyo

健夫

GREEN

No.

課題名

氏名

16

パワー半導体における欠陥構造とその電子物性の相関関係：第一原理計算からのアプローチ

松下

17

量子転移の第一原理計算

18

所属

Title

Name

Organization

ISSP Activity Report 2019143

東京工業大学

Relation between defect structures and electronic properties inTokyo Institute ofYu-Ichiro Matsushita
power semiconductors: Approach from ab-initio calculations
Technology

レービガー
ハンネス

横浜国立大学大学院工学研究院

First principles calculation of quantum phase transitions

Hannes Raebiger

Yokohama National
University

次世代二次電池界面・電解液に関する第一原理
サンプリング研究館山佳尚

物質・材料研究機構

GREEN

DFT sampling analysis of interfaces and electrolytes in novel
batteries

Yoshitaka Tateyama

National Institute forMaterials Science19

表面、界面、欠陥における原子構造と原子ダイ
ナミクスの解析渡邉聡

東京大学大学院工学系研究科

Analyses of atomic structures and atom dynamics at surfaces,interfaces and defects

Satoshi Watanabe

The University of
Tokyo

20

第一原理計算による金属過水素化物の金属化および超伝導機構の研究明石遼介

東京大学大学院理学系研究科

Ab initio study on the metallization and superconductivity inmetallic superhydrides

Ryosuke Akashi

The University of
Tokyo

21

金属／半導体界面のギャップ状態制御の物理：第中山
一原理計算による研究

隆史

千葉大学理学部物理学科

First-principles study on physics of gap-state control at metal/
semiconductor interfaces

Takashi Nakayama

Chiba University

22

第一原理計算による二次電池用正極材料の解析

山田淳夫

東京大学工学系研究科

First-principles analyses on the cathode materials forrechargeable batteriesAtsuo Yamada

The University of
Tokyo

23

第一原理シミュレーションによる不均一触媒反応過程の研究森川良忠

大阪大学大学院工学研究科

First-principles Theoretical Study of Chemical Reactions in
Heterogeneous Catalysts

Yoshitada Morikawa

Nagoya University

24

第一原理電子状態・輸送特性計算コード RSPACE
小野の開発とデバイスシミュレーション

倫也

神戸大学大学院工学研究科

Development of first-principles electronic-structure andtransport calculation code RSPACE and simulations for device

Tomoya Ono

Kobe University

25

GaN 系パワーデバイス用ゲート絶縁膜の理論的
設計

白石

賢二

名古屋大学未来材料・システム研 Theoretical Design of Gate Dielectrics of Future GaN Power
Devices
究所

Kenji Shiraishi

Nagoya University

26

高ドープイオン伝導体の第一原理配置サンプリ
ング解析

笠松

秀輔

山形大学学術研究院

First-principles configurational sampling of highly-doped ionic
conductors

Shusuke Kasamatsu

Yamagata University

27

第一原理計算を用いたクラスレート化合物の熱
電特性解析

大西

正人

東京大学機械工学専攻

Analysis of Thermoelectric Properties of Clathrate Compounds
Masato Ohnishiwith Ab Initio Calculations

28

マルチフェロイク界面の第一原理計算

合田

義弘

東京工業大学物質理工学院材料系 First-principles calculations of multiferroic interfaces29

遷移金属磁性酸化物の第一原理電子状態計算

山内邦彦

大阪大学産業科学研究所

30

高圧力下における共有結合性液体・ガラスの構
造と電子状態の第一原理計算

下條

冬樹

31

有機溶媒中のイオン種の拡散プロセスの解明

赤木32

マルチスケ－ル MD シミュレ－ションによる生体触媒反応メカニズムの解析

舘野

雄一郎

The University ofTokyo

Yoshihiro Gohda

Tokyo Institute ofTechnology

First-principles density functional calculations of transitionmetal magnetic oxides

Kunihiko Yamauchi

Osaka University

熊本大学大学院自然科学研究科

First-Principles Molecular-Dynamics Study of Structural andElectronic Properties of Covalent Liquids and Glasses under
Pressure

Fuyuki Shimojo

Kumamoto University

和人

東北大学材料科学高等研究所

Elucidation of diffusion process of ionic species in organic
solvent

Kazuto Akagi

Tohoku University

賢

兵庫県立大学大学院生命理学研究 Multi-scale Hybrid Molecular Dynamics Simulations ofBiological Catalysis
科

Masaru Tateno

University of Hyogo

144

No.

課題名

ISSP Activity Report 2019

氏名

所属

達彦

大阪大学大学院基礎工学研究科

First-principles molecular dynamics simulation of electrondoped graphene/water interfaces

Tatsuhiko Ohto

Osaka University

東京大学工学部機械工学科

Energy Transport in Hybrid Organic-Inorganic Thermoelectric
Shenghong Ju
Materials

The University of
Tokyo

Title

Name

Organization33

電子ドープグラフェン / 水界面の第一原理分子動大戸
力学シミュレーション

34

有機 - 無機ハイブリッド熱電材料のエネルギー輸
鞠
送35

永久磁石界面の第一原理的研究

立津

慶幸

名桜大学

First-principles study on grain boundaries of permanent
magnets

Yasutomi Tatetsu

Meio University

36

新規リチウムイオン二次電池材料の電極特性解
析：第一原理計算籾田浩義

大阪大学産業科学研究所

Electrode properties of novel lithium-ion secondary battery
materials: First-principles calculations

Hiroyoshi Momida

Osaka University37

原子層エッチングプロセスにおける表面反応解
析

浜口

智志

大阪大学工学研究科

Analyses of Surface Reactions in Atomic Layer Etching
Processes

Satoshi Hamaguchi

Osaka University

38

ナノ構造の量子伝導の第一原理計算

小林伸彦

筑波大学 数理物質系物理工学域

First-principles study of quantum transport in nanostructures

Nobuhiko Kobayashi University of Tsukuba

39

ナノ構造の励起電子・陽電子・原子動力学と光・渡辺
熱電物性の第一原理計算

一之東京理科大学理学部

First-Principles Study of Excited Electron, Positron and Atom
Dynamics and Optical and Thermoelectric Properties ofNanostructures

Kazuyuki Watanabe

40

ハイブリッド汎関数を用いた水 / 空気界面の第一
大戸
原理分子動力学シミュレーション

達彦

大阪大学大学院基礎工学研究科

First-principles molecular dynamics simulation of the water/air
Tatsuhiko Ohto
interface using hybrid functionals

Osaka University

41

磁性絶縁体における電界効果の第一原理的研究

石井史之

金沢大学ナノマテリアル研究所

First-principles study of electric-field effect on magnetic
insulator

Fumiyuki Ishii

Kanazawa University42

ギ酸分解触媒及び酸素吸蔵材料の省貴金属化

國貞雄治

北海道大学大学院工学研究院 附
Reduction of Rare Metals in Formic Acid Decomposition
属エネルギー・マテリアル融合領
Catalysts and Oxygen Storage Materials
域研究センター

Yuji Kunisada

Hokkaido University

43

第一原理計算による有機強誘電体・圧電体の物
性予測

石橋

章司

産業技術総合研究所

Shoji Ishibashi

44

燃料電池電極触媒及び水素透過膜の省貴金属化

坂口紀史

北海道大学大学院工学研究院 附
Reduction of Rare Metals in Fuel Cell Catalysts and Hydrogen
属エネルギー・マテリアル融合領
Permeable Membrane
域研究センター

National Institute ofAdvanced Industrial
Science and Technology

Norihito Sakaguchi

Hokkaido University

45

電子フォノン相互作用の精密第一原理解析

南谷英美

分子科学研究所

Emi Minamitani

Institute for Molecular
Science46

第一原理計算によるナノ物質の構造・機能の解
明と予測

武次

徹也

北海道大学大学院理学研究院化学
Ab initio study on the structure and functions of nanomaterials Tetsuya Taketsugu
部門

Hokkaido University

47

GPP モデルを使用しない GW 法の開発

野口良史

静岡大学工学部

GW method without GPP model

Yoshifumi Noguchi

Shizuoka University

48

ナノ構造の励起電子・陽電子・原子動力学と光・渡辺
熱電物性の第一原理計算

一之東京理科大学理学部

First-Principles Study of Excited Electron, Positron and Atom
Dynamics and Optical and Thermoelectric Properties ofNanostructures

Kazuyuki Watanabe

Tokyo University of
Science49

絶縁体非線形光吸収の第一原理計算

康東京大学工学系研究科附属光量子 First-principles calculations for nonlinear light absorption of
insulators
科学研究センター

Yasushi Shinohara

The University of
Tokyo

篠原

生宏

Prediction of properties of organic ferroelectrics andpiezoelectrics by first-principles calculation

Ab-initio analysis of electron-phonon interaction

Tokyo University of
Science

No.

課題名

ISSP Activity Report 2019

氏名

所属

50

スピン偏極陽電子実験の可能性を広げるための第一原理的研究斎藤峯雄

金沢大学理工研究域数物科学系

First-principles study for widening the potential of spinpolarized positron experiments

Mineo Saito

Kanazawa University

51

第一原理計算による磁性熱電物質の結晶構造予
測

石井

史之

金沢大学ナノマテリアル研究所

First-Principles Crystal Structure Prediction of Magnetic
Thermoelectric Materials

Fumiyuki Ishii

Kanazawa University

52

イリジウム酸化物 Ca5Ir3O12 の第一原理フォノ
ン分散計算

中村

和磨

九州工業大学

Ab initio phonon calculation for Ca5Ir3O12

Kazuma Nakamura

Kyushu Institute ofTechnology

53

アモルファス磁性体および永久磁石内アモルフ
ァス相界面に対する第一原理計算および磁気結合定数と局所構造の関係の解析

寺澤麻子

東京工業大学First principles calculations and analysis on relationship between
exchange coupling constants and local structures for magnetic alloys
and amorphous grain boundary phases in permanent magnets

Asako Terasawa

Tokyo Institute ofTechnology

54

スピン偏極陽電子実験の可能性を広げるための第一原理的研究斎藤峯雄

金沢大学理工研究域数物科学系

First-principles study for widening the potential of spinpolarized positron experiments

Mineo Saito

Kanazawa University

55

粒界原子ダイナミクスの解析に向けた機械学習
駆動型分子シミュレーション

横井達矢

名古屋大学大学院工学研究科

Machine-learning-driven molecular simulations for grainboundary atomic dynamics

Tatsuya Yokoi

Nagoya University

56

ギ酸分解触媒及び酸素吸蔵材料の省貴金属化

國貞雄治

北海道大学大学院工学研究院 附
Reduction of Rare Metals in Formic Acid Decomposition
属エネルギー・マテリアル融合領
Catalysts and Oxygen Storage Materials
域研究センター

Yuji Kunisada

Hokkaido University

57

第一原理電子状態・輸送特性計算コード RSPACE
小野の開発とデバイスシ ミュレーション

倫也

神戸大学大学院工学研究科

Tomoya Ono

Kobe University

58

第一原理計算による高温水中の多価アルコールの反応過程の研究

佐々木Takehiko Sasaki

The University of
Tokyo

59

多成分系に対する分子動力学計算に用いるためのニューラルネットワーク力場の構築

島村

60

2 次元ヘテロ接合材料の面外熱伝導率の操作

胡

61

結晶構造探索アルゴリズムの開発

山下

62

高性能フッ素ポリマーエレクトレットの開発

63

岳彦

Title

Development of first-principles electronic-structure andtransport calculation code RSPACE and simulations for device

東京大学大学院新領域創成科学研 Reaction processes of polyalcohols in high temperature waterby First Principles Calculations
究科

Name

Organization145

熊本大学大学院先端科学研究部

Construction of neural network force field for molecular
dynamics simulation in multicomponent system

Kohei Shimamura

Kumamoto University

東京大学機械工学塩見研究室

manipulation of the cross-plane thermal conductivity on the
2D hetero-junction materials

Shiqian Hu

The University of
Tokyo

智樹

長岡技術科学大学

Development of algorithms in crystal structure prediction

Tomoki Yamashita

Nagaoka University ofTechnology

鈴木雄二

東京大学大学院工学系研究科機械
Development of High-performance Polymer Electret
工学専攻

Yuji Suzuki

The University ofTokyo

太陽光エネルギー変換における基礎過程の研究と材料設計指針獲得のための大規模第一原理計
算

山下

晃一

京都大学

Large scale ab initio calculations on the fundamental
processes of solar energy convergence devices and on
designing principles for new materials

Koichi Yamashita

Kyoto University

64

人工光合成触媒と燃料電池触媒への計算物理化
学からのアプローチ

西館

数芽

岩手大学理工学部

Computational physics and chemistry approach to develop the
Kazume Nishidate
artificial photosynthesis and fuel cell catalysts

IWATE University

65

第一原理による機能性酸化物の原子構造および電子状態の解明幾原雄一

東京大学大学院工学系研究科総合 Ab initio calculations of atomic and electronic structures forfunctional oxide materials
研究機構

Yuichi Ikuhara

The University of
Tokyo

66

熱力学状態図の第一原理計算

中村和磨

九州工業大学

Kazuma Nakamura

Kyushu Institute ofTechnology

孝平
世謙

Ab initio calculation for thermodynamic phase diagram

146
ISSP Activity Report 2019

No.

課題名

氏名

67

量子化学計算を用いた高性能フッ素ポリマーエ
レクトレットの開発鈴木雄二

東京大学大学院工学系研究科機械 Development of High-performance Polymer Electret Using
Quantum Chemical Analysis
工学専攻

Yuji Suzuki

The University of
Tokyo

68

電子フォノン相互作用の第一原理精密解析

南谷英美

分子科学研究所

Ab-initio analysis of electron-phonon interaction

Emi Minamitani

Institute for Molecular
Science69

第一原理計算によるモデルリアル触媒上の表面反応の探求 II水上渉大阪大学 先導的学際研究機構

Exploration of surface reactions on model real catalyst II

Wataru Mizukami

Osaka University

70

熱電材料のマルチスケール計算設計

邵東京大学機械工学塩見研究室

Multiscale computational design of thermoelectric materials

Cheng Shao

The University of
Tokyo

71

第一原理計算による CARE 加工におけるプロセ
スと触媒材料の設計

稲垣耕司

大阪大学大学院工学研究科

Analysis and Design of reaction process and catalyst material
for CARE machining

Kouji Inagaki

Osaka University

72

DFT 計算による非接触原子間力顕微鏡のエネル
ギー散逸チャンネルで捉えた原子変位機構の解
明

新井

豊子

金沢大学

DFT calculation of atomic displacement captured by energy
dissipation channel of noncontact atomic force microscope

Toyoko Arai

Kanazawa University

73

第一原理分子動力学法に基づく人口網膜分子の安定性に関する研究大村訓史

広島工業大学工学部

Ab initio molecular dynamics study of stability of artificial
retina molecule

Satoshi Ohmura

Hiroshima Institute ofTechnology

74

ナノ・分子構造の動的特性設計のための第一原理 / 機械学習連成計算

鶴田健二

岡山大学大学院自然科学研究科

Hybrid Ab-Initio/Machine-Learning Computation for Designing
Kenji Tsuruta
Dynamical Properties of Nano/Molecular Structures

75

燃料電池電極触媒及び水素透過膜の省貴金属化

坂口紀史

北海道大学大学院工学研究院 附
Reduction of Rare Metals in Fuel Cell Catalysts and Hydrogen
属エネルギー・マテリアル融合領
Permeable Membrane
域研究センター

Norihito Sakaguchi

Hokkaido University

76

有機半導体結晶の有限温度下の電子状態に向けたフォノン解析の実装

柳澤将

琉球大学理学部物質地球科学科物 Implementation of the phonon analysis for organic
semiconductor crystals
理系

Susumu Yanagisawa

University of the
Ryukyus77

有機分子膜での構造歪み・欠陥の電子構造への影響に関する理論的研究

柳澤将

琉球大学理学部物質地球科学科物 Structural distortion or defect in organic molecular thin film:
theoretical study
理系

Susumu Yanagisawa

University of the
Ryukyus78

ナノグラフェンの輸送と反応のシミュレーショ
ン

草部

浩一

大阪大学大学院基礎工学研究科

Transport and reaction properties of nanographene

Koichi Kusakabe

Osaka University

79

2 次元物質における電子状態および電子輸送特性
江上制御に関する第一原理研究

喜幸

北海道大学大学院工学研究院

First-principles study on controlling of electronic structuresand electron-transport properties of 2-D materials

Yoshiyuki Egami

Hokkaido University

80

van der Waals 密度汎関数法による有機 - 金属界
濱本
面の鏡像状態の理論的研究

雄治

大阪大学 大学院工学研究科 精密 van der Waals density functional study of image potential
states at organic-metal interfaces
科学・応用物理学専攻

Yuji Hamamoto

Osaka University

81

シリサイド薄膜系の原子構造と電子状態

服部賢

奈良先端科学技術大学院大学物質
Atomic structure and electronic states for silicide films
創成科学研究科

Ken Hattori

Nara InstituteofScience andTechnology

82

カーボンナノチューブ・グラフェンの電子物性の解明：第一原理計算

藤本義隆

東京工業大学大学院理工学研究科 First-principles investigation of electronic properties of carbon
Yoshitaka Fujimoto
nanotubes and graphene
物性物理学専攻

Tokyo Institute ofTechnology

83

イリジウム酸化物に対する第一原理有効模型導出および高精度解析中村和磨

九州工業大学

Kyushu Institute ofTechnology

成

所属

Title

Ab initio calculations for Sr2IrO4 and Ca5Ir3O12

Name

Kazuma Nakamura

Organization

Okayama University

ISSP Activity Report 2019

147

No.

課題名

氏名

所属

84

不純物半導体の転位に生じるリーク電流の第一
原理的研究

原嶋

庸介

名古屋大学未来材料・システム研 First principles study on leaking current at a dislocation in
doped semiconductors
究所

85

第一原理分子動力学法によるヘテロ界面原子構
造および電子状態の解明

幾原雄一

東京大学大学院工学系研究科総合 Study of atomic and electronic structure of hetero interface byYuichi Ikuhara
first-principles molecular dynamics simulations
研究機構

The University of
Tokyo

86

プロトン伝導性固体電解質中のイオン電導機構
解析とプロトン伝導体を用いた触媒表面反応へ
の応用

大友

順一郎

Analysis of ion conduction in materials of proton-conducting
東京大学大学院新領域創成科学研
solid electrolyte and application to catalytic surface reaction
究科環境システム学専攻
with proton conductors

Junichiro Otomo

The University of
Tokyo

87

第一原理計算における電界を印加された Pt 薄膜における強磁性発現に関する研究佐藤徹哉

慶應義塾大学理工学部

Study of appearance of ferromagnetism by electric field
application to Pt thin film

Tetsuya Sato

Keio University88

有機 - 無機ハイブリッド熱電材料のエネルギー輸
鞠送

東京大学工学部機械工学科

Energy Transport in Hybrid Organic-Inorganic Thermoelectric
Shenghong Ju
Materials

The University of
Tokyo

89

合金触媒の原子構造と電子構造に関する理論的
研究

野澤

和生

鹿児島大学理学部物理科学科

Atomic and electronic structures of intermetallic compound
catalysts

Kazuki Nozawa

Kagoshima University90

原子層状物質における電子状態および電子輸送特性制御に関する第一原理研究

江上喜幸

北海道大学大学院工学研究院

First-principles study on controlling of electronic structuresand electron-transport properties of atomic layered materials

Yoshiyuki Egami

Hokkaido University

91

希土類混晶磁石材料の磁気特性データ構築

赤井久純

東京大学物性研究所

Data accumulation of magnetic properties of rare earth mixed
crystal magnetic materials

Hisazumi Akai

The University of
Tokyo

92

第一原理分子動力学法に基づくガラスの静的構
造に関する研究高良明英

熊本大学学生支援部

First principles study on static structure of glass materials

Akihide Koura

Kumamoto University

93

照射損傷と格子間原子との相互作用の研究

大澤一人

九州大学応用力学研究所

Study of interaction between radiation damage and interstitial
atom

Kazuhito Ohsawa

Kyushu University

94

プロトン伝導性固体電解質中のイオン電導機構
解析とプロトン伝導体を用いた触媒表面反応へ
の応用

大友

順一郎

95

遷移金属の吸着に伴う量子井戸バンドの変調を用いた Pd(100) 超薄膜の磁性制御

櫻木

俊輔

96

磁性分子複合体・結晶・界面系の原子・磁気構造の解析と外部電場・磁場効果の調査

小幡

正雄

97

対称および非対称磁気抵抗接合に基づく二次元
物質

ハシュミ
ルカム

98

Sb 系テラヘルツトランジスタのための歪バンド
構造設計

藤代

99

エタノール水溶液中の水，エタノールの電子状態

100

第一原理分子動力学計算による van der Waals
相互作用の検証と振動スペクトル計算

生宏

ア

Title

Name
Yosuke Harashima

Analysis of ion conduction in materials of proton-conducting
東京大学大学院新領域創成科学研
solid electrolyte and application to catalytic surface reaction
Junichiro Otomo
究科環境システム学専攻
with proton conductors
Controlling of magnetism in Pd(100) ultrathin films by
modification of quantum-well states via adsorption of transition Shunsuke Sakuragi
東京大学物性研究所
metalsAnalysis on atomic and magnetic structure in magnetic
molecular complex, crystal and interface and investigation of Masao Obata
金沢大学理工研究域
external electric and magnetic field effectOrganization
Nagoya University

The University ofTokyo
The University ofTokyo
Kanazawa University

筑波大学計算科学研究センター

2D materials based symmetric and non-symmetricmagnetoresistive junctions

Arqum Hashmi

University of Tsukuba

博記

東京理科大学

Strained Band-Structure Engineering for Antimonide-BasedTerahertz Transistors

Hiroki Fujishiro

Tokyo University of
Science高橋修

広島大学大学院理学研究科

Electronic state of water and ethanol in aqueous solution

Osamu Takahashi

Hiroshima University

平塚

将起

工学院大学機械工学科

Effect of van der Waals interaction on vibrational spectra from
Masaki Hiratsuka
ab initio molecular dynamics simulation

Kogakuin University

148
ISSP Activity Report 2019

No.

課題名

氏名

所属

101

ハーフメタル材料の有限温度特性に関する第一
原理計算

三浦

良雄

物質・材料研究機構

A first-principles calculation on finite temperature effects ofhalf-metallic ferromagnets

Yoshio Miura

National Institute forMaterials Science102

磁性分子複合体・結晶・界面系の原子・磁気構造の解析と外部電場・磁場効果の調査

小幡正雄

金沢大学理工研究域

Analysis on atomic and magnetic structure in magnetic
molecular complex, crystal and interface and investigation of
external electric and magnetic field effectMasao Obata

Kanazawa University

103

物質表面における場の量子論に基づく局所物理
量解析

福田

将大

東京大学物性研究所

Local physical quantities analysis based on the quantum field
theory in material surface

Masahiro Fukuda

The University of
Tokyo

104

溶媒和を考慮した超臨界場における反応の理論
計算

横東北大学材料科学高等研究所

Theoretical calculation of solvation and reaction insupercritical fluids

Akira Yoko

Tohoku University

久純

東京大学物性研究所

Data accumulation of magnetic properties of rare earth mixed
crystalHisazumi Akai

The University ofTokyo

105 希土類混晶磁石材料の磁気特性データ構築

赤井

哲

Title

Name

Organization

The National Institutes for106

表面における電子 - 陽電子散乱の実時間発展シミ
萩原ュレーション

聡

国立研究開発法人量子科学技術研 Real-time propagated simulation for electron-positronscattering at the surface
究開発機構

107

第一原理バンド計算に基づく低エネルギーモデ
ルの構築方法の開発榊原寛史

鳥取大学大学院工学研究科

Developments of a derivation method of a low-energy models
in first-principles

Hirofumi Sakakibara Tottori University

108

有機分子の超高圧処理による新規固体生成過程の第一原理計算

島田

敏宏

北海道大学

First principle simulation on ultrahigh pressure synthesis of
new material from organic molecules

Toshihiro Shimada

109 高次フォノン - フォノン散乱強度の第一原理計算 出倉春彦

愛媛大学地球深部ダイナミクス研 First-principles calculation of the higher-order phonon-phonon
Haruhiko Dekura
scattering strength
究センター

有馬

健太

大阪大学 大学院 工学研究科

Simulation of STM images of graphene sheet after chemical
reduction

Kenta Arima

Osaka University

111 凝集誘起発光についての理論的研究

山本典史

千葉工業大学

Theoretical Study on the Aggregation-Induced Emission

Norifumi Yamamoto

Chiba Institute ofTechnology

112 超伝導密度汎関数理論の精度検証

河村

光晶

東京大学物性研究所

Benchmark of density functional theory for superconductors

Mitsuaki Kawamura

The University ofTokyo

113 様々な環境下における水の電子状態

高橋修

広島大学大学院理学研究科

Electronic state of water under various environments

Osamu Takahashi

Hiroshima University

押川正毅

東京大学物性研究所

A data-driven investigation of topological materials based onsymmetry

Masaki Oshikawa

The University of
Tokyo

福田

常男

大阪市立大学大学院工学研究科電 First Principles Calculation of 2-Dimensional Silicides Formedon Nickel Surfaces
子情報系専攻Tuneo Fukuda

Osaka City University

Tatsuya Joutsuka

Ibaraki University

Matsunaka Daisuke

Shinshu University

110

114

化学還元により形成したグラフェンシートのSTM 像シミュレーション

対称性に基づくデータ駆動的トポロジカル物質
探索

115 Ni 表面上２次元シリサイドの第一原理計算

大学院工学研究院

116

分子動力学シミュレーションと第一原理計算を用いた固体・液体界面における分子科学

城塚

達也

茨城大学

117

第一原理計算に基づくマグネシウム合金の欠陥
場の解析

松中

大介

信州大学工学部機械システム工学
First-principles Study of Defects of Magnesium Alloys
科

Molecular Science at Solid/Liquid Interfaces using Molecular
Dynamics Simulation and Ab Initio Calculation

Satoshi Hagiwara

Quantum and Radiological
Science and Technology

Hokkaido University
Ehime University

No.

課題名

氏名

所属

高圧下における液体 Fe-Si-O 混合系の構造と不混
118 和性に関する第一原理分子動力学シミュレーシ 大村ョン

訓史

広島工業大学119

固体表面・界面、微粒子の新規電子物性の探索
と実現

稲岡

毅

120

磁気トンネル接合における磁気抵抗比、磁気異方性の第一原理解析

増田121

水溶液中ケージド化合物の吸収スペクトルにつ
いての解析

122

Title

Name

Organization

ISSP Activity Report 2019

Ab initio molecular dynamics study of structural properties andSatoshi Ohmura
immiscibility in liquid Fe-Si-O mixtures under high pressure

Hiroshima Institute ofTechnology

琉球大学理学部

Search and realization of novel electronic properties of solid
surfaces and interfaces and of small particles

University of the
Ryukyus

啓介

物質・材料研究機構

First-principles study of magnetoresistance ratios and magnetic
Keisuke Masuda
anisotropy in magnetic tunnel junctions

National Institute forMaterials Science

樋山

みやび

群馬大学

Analysis of absorption spectra for caged compounds inaqueous solution

Miyabi Hiyama

Gunma University

機械学習を用いた半導体デバイス中の電流経路設計に関する研究村口正和

北海道科学大学

Study on carrier dynamics in nano scale semiconductor
devices with machine learning

Masakazu Muraguchi

Hokkaido Universityof Science

123

有機修飾金属酸化物ナノ粒子の構造および物性に関する理論研究横東北大学材料科学高等研究所

Theoretical study for structure and property of organic
modified metal oxide nanoparticles

Akira Yoko

Tohoku University

124

定常電場印加下での強相関酸化物の電子構造計
算

牧野

哲征

福井大学学術研究院工学系部門

Electronic structure calculation in strongly-correlated electronoxides under presence of static electric fieldTakayuki Makino

University of Fukui

125

触媒インフォマティクスに向けた複合酸化物の表面物性計算日沼洋陽

千葉大学先進科学センター

Calculation of multication oxide surface properties for catalyst
Yoyo Hinuma
informatics

126

ヨウ化銅を用いた低圧化学気相成長法によるルテニウム基板上銅膜の高速成長の第一原理計算

城塚

達也

茨城大学

127

磁気トンネル接合および巨大磁気抵抗素子における熱電性能の第一原理計算

山本薫

物質・材料研究機構

128

銅酸化物におけるフォノン状態密度分布の第一
原理計算

牧野

哲征

福井大学学術研究院工学系部門

首藤

健一

稲岡

129 PbS ナノ構造電子状態の不純物効果
130

固体表面・界面、微粒子の新規電子物性の探索と実現 II

131 半導体表面界面における構造的素励起の研究

哲

工学部

Ab Initio Calculation of High-Rate Deposition of Copper Filmby Low-Pressure Chemical Vapor Deposition with CuI on Ru
Substrate
First-principles calculation of thermoelectric properties formagnetic tunneling junctions and giant magneto-resistancedevices

Takeshi Inaoka

Chiba University

Tatsuya Joutsuka

Ibaraki University

Kaoru Yamamoto

National Institute forMaterials Science

Ab-initio calculation of phonon density-of-states spectra incuprous oxides

Takayuki Makino

University of Fukui

横浜国立大学・工学部

Impurity effects on electronic states of PbS nano-particles

Ken-Ichi Shudo

Yokohama National
University

毅

琉球大学理学部

Search and realization of novel electronic properties of solid
surfaces and interfaces and of small particles II

Takeshi Inaoka

University of the
Ryukyus影島博之

島根大学大学院自然科学研究科

Study on structural elementary excitations at semiconductor
surfaces and interfaces

Hiroyuki Kageshima

Shimane University

149

132

Sb 系テラヘルツトランジスタのための歪バンド
構造設計

藤代

博記

東京理科大学

Strained Band-Structure Engineering for Antimonide-BasedTerahertz Transistors

Hiroki Fujishiro

Tokyo University of
Science133

デラフォサイト銅酸化物における電子格子相互
作用の計算

牧野

哲征

福井大学学術研究院工学系部門

Calculation of electron-phonon interaction in delafossite-type
cuprates

Takayuki Makino

University of Fukui

134

新たなナノスケール表面界面の電子物性の理論
的研究

小林

功佳

お茶の水女子大学理学部物理学科

Theoretical study on electronic properties of new nanoscalesurfaces and interfaces

Katsuyoshi
Kobayashi

Ochanomizu
University

150

No.

課題名

135

線形応答理論の枠組みにおけるゼーベック係数の第一原理計算手法の開発

ISSP Activity Report 2019136 第一原理的計算手法の発展と適用

氏名
高

成柱

所属

Title

Name

Organization

東京工業大学物質理工学院

Development of First-principles calculations method ofSonju Kou
Seebeck coefficient in the framework of linear response theory

Tokyo Institute ofTechnology

池田浩章

立命館大学理工学部物理科学科

Development and application of the first-principles approach

Hiroaki Ikeda

Ritsumeikan
University

137

超高圧下におけるケイ酸塩物質の構造と電子状態に関する第一原理的研究

三澤賢明

岡山大学大学院自然科学研究科

First-principles study on the structures and electronic
properties of silicates under high pressure

Masaaki Misawa

Okayama University

138

超伝導基板への吸着を応用したランタノイド 4f
スピン検出に関する理論的研究

塚原規志

群馬工業高等専門学校

Theoretical study of spin detection in lanthanoid atoms andmolecules by adsorption on superconducting substrate

Noriyuki Tsukahara

Gunma College

139 クロムおよびマンガン合金の磁気特性の解析

小田洋平

福島工業高等専門学校

Analysis of magnetic properties in Cr and Mn alloys

Yohei Kota

Fukushima College

140 金属クロムの磁性に対するひずみ効果の解析

小田洋平

福島工業高等専門学校

Analysis of strain effect on magnetism in chromium metals

Yohei Kota

Fukushima College

141 様々な環境下における水の電子状態

高橋修

広島大学大学院理学研究科

Electronic state of water under various environments

Osamu Takahashi

Hiroshima University

142 強磁性薄膜のバンド計算秋山

了太

東京大学理学系研究科物理学専攻 Band calculation of ferromagnetic thin films

Ryota Akiyama

The University of
Tokyo

北川

健太郎

東京大学理学系研究科物理学専攻 Screening test for substrates on epitaxial growth of thin film

Kentaro Kitagawa

The University of
Tokyo

143

第一原理計算によるエピタキシャル成長薄膜合成基板のスクリーニング

144

トリディマイト多形の NMR スペクトル第一原理
神崎
計算

正美

岡山大学惑星物質研究所

NMR spectrum calculations of tridymite polytypes by firstprinciples calculation

Masami Kanzaki

Okayama University

145

π電子系有機分子／金属界面の電子状態と分子
間相互作用

有賀

哲也

京都大学理学研究科化学専攻

Electronic structure and interaction at the interface of pielectron organic molecules and metals

Aruga Tetsuya

Kyoto University

三澤貴宏

東京大学物性研究所

Numerical analysis of quantum transport phenomena in
topological materials

Takahiro Misawa

The University of
Tokyo

今田

正俊

早稲田大学理工学術院

Development of methodology for analysis of nonequilibrium
superconductivity in strongly correlated systems via integration Masatoshi Imadaof electronic state theory and time-resolved experimental data

Waseda University

今田正俊

早稲田大学理工学術院

Mechanism of quantum spin liquid and high-Tc superconductivity
studied by excitation spectra and nonequilibrium dynamics
calculation by variational Monte Carlo methods

Masatoshi Imada

Waseda University

Youhei Yamaji

The University ofTokyo

2. 強相関 / Strongly Correlated Quantum Systems
146 トポロジカル物質の量子輸送現象の数値解析
電子状態理論と時間分解実験データの統合によ147 る強相関系での非平衡高温超伝導の解析手法創出
変分モンテカルロ法による励起スペクトルと非148 平衡ダイナミックス計算による量子スピン液体と高温超伝導の機構解明への貢献
149

フラストレートした量子スピン系におけるエネ
ルギー流相関の数値的研究

山地洋平

東京大学大学院工学系研究科

Numerical studies on energy current correlations in frustrated
quantum spin systems

150

2 次元ウィグナー結晶の格子整合性に関する変分
加藤
モンテカルロ計算

岳生

東京大学物性研究所

Variational Monte Carlo calculation of two-dimensional Wigner
Takeo Kato
crystal under lattice commensurability

The University of
Tokyo

No.

課題名

151

異種アニオンから構成される梯子型電子状態における超伝導の可能性に関する研究

黒木

152

スピン軌道結合と電子相関による量子物性の理
論的研究

求

153

強いスピン軌道結合がもたらす新奇量子物性の
理論的研究

求

154 強相関系の磁性・トポロジーと輸送現象

氏名

所属

Title

Name

Organization

大阪大学

Study on the possibility of superconductivity in ladder-type
electronic structures constructed from multiple anions

幸年

東京大学大学院工学系研究科

Theoretical study of quantum properties induced by spin-orbit
Yukitoshi Motome
coupling and electron correlation

The University of
Tokyo

幸年

東京大学大学院工学系研究科

Theoretical study of novel quantum properties induced bystrong spin-orbit coupling

Yukitoshi Motome

The University of
Tokyo

和彦

Kazuhiko Kuroki

Osaka University

川上則雄

京都大学大学院理学研究科

Study of magnetism, topology and transport phenomena instrongly correlated quantum systems

Norio Kawakami

Kyoto University

155

第一原理計算と量子多体計算による多バンド系の電子状態と超伝導

大野

義章

新潟大学

First-principles and quantum many-body calculations forelectronic states and superconductivity in the multi-band
systems

Yoshiaki Ono

Niigata University156

点群対称性に基づいた新規スキルミオン結晶の
探索

速水

賢

北海道大学理学部物理学科

Search for new types of skyrmion crystals based on point
group symmetry

Satoru Hayami

Hokkaido University

157

軌道自由度をもつ相関電子系における非平衡ダ
イナミクスの数値解析古賀昌久

東京工業大学

Numerical analysis for nonequilibrium dynamics in correlated
electron systems with orbital degrees of freedom

Akihisa Koga

Tokyo Institute ofTechnology

石塚

淳

京都大学

Multipole and anisotropic superconductivity from firstprinciples

Jun Ishizuka

Kyoto University

158 多極子と異方的超伝導の第一原理的研究

ISSP Activity Report 2019159

熱力学極限で定式化された連続虚時間量子モン
テカルロ法の開発と応用

大越孝洋

東京大学大学院工学系研究科

Development and applications of continuous-time quantum
Monte Carlo method in the thermodynamic limit

Takahiro Ohgoe

The University of
Tokyo

160

強相関ダイナミクスが誘起する新奇トポロジカ
ル現象

吉田

恒也

筑波大学

Novel topological phenomena induced by strongly correlated
dynamics

Tsuneya Yoshida

University of Tsukuba

161

強相関系の磁性と超伝導 : 非平衡系の手法を含む
川上
アプローチによる解析

則雄

京都大学大学院理学研究科

Study of magnetism and superconductivity in strongly
correlated quantum systems using approaches including nonequilibrium methods

Norio Kawakami

Kyoto University

古賀昌久

東京工業大学

Magnetic and transport properties in double-exchange systems
Akihisa Koga
with quasiperiodicity

162 準周期構造をもつ二重交換系の磁性と伝導性

数理物質系

151

163

ニッケル酸化物における金属絶縁体転移の機構
解明

野村

悠祐

理化学研究所創発物性科学研究セStudy on metal-insulator transition in nickel oxides
ンター

164

複合アニオン化合物における電子相関と超伝導の可能性に関する研究

黒木

和彦

大阪大学

165

超ウラン系における 2 チャンネル近藤効果の研
究

堀田

貴嗣

166

Γ7 および Γ8 伝導バンドと混成する多軌道アンダ
堀田ーソンモデルにおける 2 チャンネル近藤効果

167

時間変動する磁場下でのキタエフスピン液体の
磁気状態

那須

Tokyo Institute ofTechnology

Yusuke Nomura

RIKEN

Study on electron correlation and possible superconductivity
in mixed-anion systems

Kazuhiko Kuroki

Osaka University

首都大学東京理学研究科

Research of Two-Channel Kondo Effect in Transuranium
Systems

Takashi Hotta

Tokyo Metropolitan
University

貴嗣

首都大学東京理学研究科

Two-Channel Kondo Effect Emerging in a Multiorbital
Anderson Model Hybridized with Γ7 and Γ8 Conduction Bands

Takashi Hotta

Tokyo Metropolitan
University

譲治

横浜国立大学

Magnetic state of Kitaev spin liquid under time-dependent field Joji Nasu

Yokohama National
University

152
ISSP Activity Report 2019

No.

課題名

氏名

所属

168

強相関系で発現する非エルミートトポロジカル
物性

吉田

恒也

筑波大学数理物質系

Non-Hermitian topological phenomena in strongly correlated
systems

Tsuneya Yoshida

University of Tsukuba

169

キタエフ量子スピン液体に対する磁場クエンチ
による時間発展那須譲治

横浜国立大学Time evolution by magnetic-field quench in Kitaev spin liquid

Joji Nasu

Yokohama National
University

170

有機ディラック電子系α -(BEDT-TTF)2I3 の電荷
小林
秩序相におけるスピン電荷分離晃人

名古屋大学大学院理学研究科

Spin-Charge Separation in Charge Order Phase of Organic
Dirac Electron System α-(BEDT-TTF)2I3

Akito Kobayashi

Nagoya University

171

動的平均場理論＋量子モンテカルロ法による多軌道強相関電子系の研究

星野

晋太郎

埼玉大学

Dynamical mean-field theory + quantum Monte Carloapproach to strongly correlated electron systems with multiorbitals

Shintaro Hoshino

Saitama University

石原純夫

東北大学大学院理学研究科

Photoinduced dynamics and high harmonic generation inmagnetism

Sumio Ishihara

Tohoku University

品岡寛

埼玉大学理学部物理学科

Exploring low-rank tensor representation of Matsubara Green's
Hiroshi Shinaoka
functions

Saitama University

172 磁性体の光誘起ダイナミクスと高次高調波

Title

Name

Organization

173

温度グリーン関数の低ランクテンソル表現の探索174

有機ディラック電子系α -(BEDT-TTF)2I3 の電荷
小林
秩序相におけるスピン電荷分離晃人

名古屋大学大学院理学研究科

Spin-Charge Separation in Charge Order Phase of Organic
Dirac Electron System α-(BEDT-TTF)2I3

Akito Kobayashi

Nagoya University

175

ハバードモデルにおける超伝導及び磁性状態の
研究

山田

篤志

千葉大学理学研究科

Superconductivity and magnetic properties of the Hubbard
model

Atsushi Yamada

Chiba University

176

最大エントロピー法やスパースモデリングを用いた状態密度の推定松田康弘

東京大学物性研究所

Estimation of the density of states using Maximum entropy
method and Sparse modeling

Yasuhiro Matsuda

The University of
Tokyo

177

変分モンテカルロ法による強相関電子系の基底状態・励起状態の計算

渡部洋

理化学研究所

Calculation for ground and excited states in strongly-correlated
Hiroshi Watanabe
electron systems by variational Monte Carlo method

178

最適化モンテカルロ法および第一原理計算による強相関電子系の研究柳沢孝

産業技術総合研究所

179

最適化モンテカルロ法および第一原理計算による強相関電子系の研究柳沢孝

産業技術総合研究所

180

希土類金属化合物における置換可能非磁性元素のスクリーニング

小林

理気

琉球大学

181

電荷秩序相における電子エネルギーのキャリア
密度依存性

酒井

正俊

千葉大学大学院工学研究院電気電 Excess Carrier Density Dependence of Electronic Energy in
Charge Order Phase子

Study of strongly correlated electron systems based on
optimization Monte Carlo method and first-principles
calculations
Study of strongly correlated electron systems based on
optimization Monte Carlo method and first-principles
calculations
Screening of substitutable non-magnetic element in rare-earth
inter-metallic compounds

RIKEN

Takashi Yanagisawa

National Institute ofAdvanced Industrial
Science andTechnology

Takashi Yanagisawa

National Institute ofAdvanced Industrial
Science andTechnology

Riki Kobayashi

University of the
Ryukyus

Masatoshi Sakai

Chiba University

3. 巨視系の協同現象 / Cooperative Phenomena in Complex, Macroscopic Systems
182

全原子・粗視化分子動力学シミュレーションによるソフトマターの分子論的解析

篠田

渉

名古屋大学大学院工学研究科

Molecular basis analysis of Soft Materials using All-Atom andCoarse-Grained Molecular Dynamics Simulations

Wataru Shinoda

Nagoya University

183

テンソルネットワーク表現に基づくキタエフ関連モデルの変分計算

川島直輝

東京大学物性研究所

Variational calculation of Kitaev and related models withtensor-network representation

Naoki Kawashima

The University of
Tokyo

No.

課題名

184

高次特異値分解を応用したテンソルのリング分
解とその応用185

複雑流体中のキャビテーション流れの分子動力学シミュレーション

186 複雑流体中のカルマン渦キャビテーション

氏名

所属

川島

直輝

東京大学物性研究所

Tensor-Ring Decomposition Based on HOSVD and Its
Appication

Naoki Kawashima

The University of
Tokyo

浅野

優太

東京大学物性研究所

Molecular Dynamics Simulation of Cavitating Flow in aComplex Fluid

Yuta Asano

The University of
Tokyo

浅野

優太

東京大学物性研究所

Karman-Vortex Cavitation in a Complex Fluid

Yuta Asano

The University of
Tokyo

Title

Name

187

パイロクロア格子上フラストレート模型におけるスピンと格子ひずみの同時ガラス転移

吉野

元

大阪大学サイバーメディアセンタ Simultaneous spin and Jahn-Teller glass transitions in a model
Hajime Yoshino
frustrated system on pyrochlore latticeー188

量子多体系におけるエンタングルメント・量子
相転移・量子ダイナミクス

藤堂眞治

東京大学大学院理学系研究科

189

分子動力学シミュレーションによる全長アミロ
イドベータペプチドの凝集過程の研究

奥村

久士

川村

190 フラストレート磁性体における新奇秩序
191

低次元系のスピンネマティック相の数値対角化による研究

192 生体膜の構造形成
193

機械学習の技術を用いたフラストレート磁性体の研究

ISSP Activity Report 2019

194 生体膜の構造形成

Osaka University

Synge Todo

The University ofTokyo

自然科学研究機構生命創成探究セ Aggregation process of full-length amyloid-beta peptides
studied by molecular dynamics simulations
ンター

Hisashi Okumura

Institute for Molecular
Science光

大阪大学理学研究科

Hikaru Kawamura

Osaka University

坂井徹

兵庫県立大学大学院物質理学研究 Numerical Diagonalization Study on Spin Nematic Phase of
Low-Dimensional Systems
科

Toru Sakai

University of Hyogo

野口博司

東京大学物性研究所

structure formation of biomembrane

Hiroshi Noguchi

The University of
Tokyo

野村

悠祐

理化学研究所
センター

Study on frustrated magnetism using machine learning

Yusuke Nomura

RIKEN

野口

博司

東京大学物性研究所

structure formation of biomembranes

Hiroshi Noguchi

The University ofTokyo

東京大学大学院理学系研究科

Novel phases and dynamics in frustrated spin systems

Tsuyoshi Okubo

The University ofTokyo
The University ofTokyo

創発物性科学研究

Entanglement, Quantum Phase Transition, and Quantum
Dynamics in Quantum Many-body Systems

Organization

Novel order in frustrated magnets

195

フラストレート磁性体の新規秩序とダイナミク
スの研究

大久保

196

大規模粗視化分子動力学法を用いた持続応力による結晶性高分子の破壊

樋口祐次

東京大学物性研究所

Creep fracture process of crystalline polymers by large-scale
molecular dynamics simulation

Yuji Higuchi

村島隆浩

東北大学大学院理学研究科

Multiscale analysis of polymeric fluids and solids

Takahiro Murashima Tohoku University

197 高分子流体・固体のマルチスケール解析

毅

153

198

Kitaev スピン液体の磁化過程に関する数値的研
究

井戸

康太

東京大学物性研究所

Numerical studies on magnetization process of the Kitaev spin
Kota Ido
liquidThe University of
Tokyo

199

スレーター・モットクロスオーバー物質のダイ
ナミクス

諏訪

秀麿

東京大学大学院理学系研究科

Dynamics of Slater-Mott crossover materials

Hidemaro Suwa

The University of
Tokyo

富田

裕介

芝浦工業大学

Study of relaxor ferroelectrics by using a minimal model

Yusuke Tomita

Shibaura Institute ofTechnology

200 ミニマル模型によるリラクサー誘電体の研究

154

No.

課題名

201 乱れた電子系における波動関数の解析

氏名

所属

大槻

東巳

上智大学理工学部

Title

Name

Organization

Wave function analyses in disordered electron systems

Tomi Ohtsuki

Sophia University

ISSP Activity Report 2019202

大規模粗視化分子動力学法による結晶性高分子の壊れやすい構造の解明

樋口祐次

東京大学物性研究所

Brittle structure of crystalline polymers by large-scale coarsegrained molecular dynamics simulation

Yuji Higuchi

The University of
Tokyo

203

マテリアルズ・インフォマティクスによる熱機
能材料の探索塩見淳一郎

東京大学工学系研究科

Screening for Thermal Functional Materials using Materials
Informatics

Junichiro Shiomi

The University of
Tokyo

204

蛋白質物性に強く関与するソフトモードの効率的サンプリングシミュレーション

北尾

彰朗

東京工業大学生命理工学院

Efficient sampling simulation of the soft modes significantly
contribute to protein properties

Akio Kitao

The University of
Tokyo

加藤

雄介

東京大学総合文化研究科

Functional Renormalization Group Study of Quantum Spin
Liquids

Yusuke KatoThe University of
Tokyo

初貝

安弘

筑波大学大学院数理物質科学研究 Universality of bulk-edge correspondence by numericalmethods科

Yasuhiro Hatsugai

University of Tsukuba

207 高分子流体・固体のマルチスケール解析

村島隆浩

東北大学大学院理学研究科

Multiscale analysis of polymeric fluids and solids

Takahiro Murashima Tohoku University

208 蜂の巣格子上拡張キタエフ模型のスピン液体鈴木隆史

兵庫県立大学

Quantum spin liquids in extended Kitaev models on ahoneycomb lattice

Takafumi Suzuki

University of Hyogo

205 スピン液体相の汎関数くりこみ群による研究
206

数値的手法によるバルクエッジ対応の普遍性の研究

大学院工学研究科

209

異方性のある量子スピン反強磁性鎖のトポロジ
カル磁化プラトー

坂井徹

兵庫県立大学大学院物質理学研究 Topological Magnetization Plateau of Quantum
Antiferromagnetic Spin Chain with Anisotropies
科

Toru Sakai

University of Hyogo

210

分子動力学シミュレーションによる全長アミロ
イドベータペプチドの凝集過程の研究

奥村久士

自然科学研究機構生命創成探究セ Aggregation process of full-length amyloid-beta peptides
studied by molecular dynamics simulations
ンター

Hisashi Okumura

Institute for Molecular
Science

211

産業や医療に有用な新規タンパク質の合理的設
計

新井

宗仁

東京大学大学院総合文化研究科

Computational rational design of novel proteins for industrial
and pharmaceutical applications

Munehito Arai

The University of
Tokyo

川村

光

大阪大学理学研究科

Novel order in frustrated magnets

Hikaru Kawamura

Osaka University

212 フラストレート磁性体における新奇秩序
213

希土類永久磁石における第一原理有限温度計算と実験測定のデータ同化

松本

宗久

高エネルギー加速器研究機構 物質構造科学研究所

Multiscale data assimilation between ab initio theory at finite
temperatures and experiments for rare-earth permanent
magnets

Munehisa
Matsumoto

KEK

214

抗アレルギー薬の開発に向けたタンパク質デザ
イン

新井

宗仁

東京大学大学院総合文化研究科

Protein design toward the development of anti-allergy drugs

Munehito Arai

The University of
Tokyo

215

非平衡定常系に拡張された熱力学関数による構造形成の研究中川尚子

茨城大学理学部

Macroscopic properties characterized by an extended
thermodynamic functions to nonequilibrium

Naoko Nakagawa

Ibaraki University216

動的スケーリング解析を利用したトポロジカル
相転移の臨界普遍性の研究

尾関之康

電気通信大学情報理工学研究科

Dynamical scaling analysis applied to studies on ciriticaluniversality for topological phase transitions

Yukiyasu Ozeki

The University
of ElectroCommunications

岡山大学異分野基礎科学研究所

Stability of the superconductor LaFe2As2

Harald Jeschke

Okayama University

217 LaFe2As2 における超伝導安定性

Jeschke
Harald

No.

課題名

218

動的スケーリング解析を利用したトポロジカル
相転移の臨界普遍性の研究 II

219 スピン軌道絶縁体の動的スピン構造因子

氏名

所属

尾関

之康

電気通信大学情報理工学研究科

Dynamical scaling analysis applied to studies on ciriticaluniversality for topological phase transitions II

Yukiyasu Ozeki

The University
of ElectroCommunications

諏訪秀麿

東京大学大学院理学系研究科

Dynamical spin structure factor of spin-orbit insulator

Hidemaro Suwa

The University ofTokyo

Thermal effect on the quantum frustrated magnetism

Tokuro Shimokawa

Okinawa Institute of
Science and Technology
Graduate University

Title

Name

Organization220

フラストレートした量子磁性体に対する熱ゆら
ぎの効果

下川

統久朗

沖縄科学技術大学院大学

221

量子スピン系の低エネルギー状態に関する数値
的研究

中野

博生

兵庫県立大学大学院物質理学研究
Numerical study on low-energy states of quantum spin systems Hiroki Nakano
科222

低次元フラストレート量子スピン系の強磁場相
の研究

松田

康弘

東京大学物性研究所

Study on the high-field-induced phases of low dimensional
frustrated quantum spin system

Yasuhiro Matsuda

The University ofTokyo

223 データ駆動科学の物質科学への展開福島孝治

東京大学大学院総合文化研究科

Development of data-driven science to materials science

Koji Hukushima

The University ofTokyo

磁性材料における順問題としての電子状態デー
224 タの粗視化と逆問題としての実験データ解析の自己無撞着解析松本

宗久

高エネルギー加速器研究機構 物質構造科学研究所

Self-consistent analysis between miroscopic electronic
structure calculations and macroscopic data analysis forexperimental measurements

Munehisa
Matsumoto

KEK

225

カゴメ格子 Kitaev-Heisenberg 模型の有限温度の性質とスピンダイナミクス

遠山貴己

東京理科大学理学部応用物理学科

Finite-Temperature Properties and Spin Dynamics in Kagome
Kitaev-Heisenberg Model

Takami Tohyama

Tokyo University of
Science226

近赤外光を有効利用する色素の分子設計のための電子状態データベースの作成

小松

勇

国立天文台

Constructing the electronic structure database for themolecular design of pigments utilizing near infrared light

Yu Komatsu

National Astronomical
Observatory of Japan渕崎

員弘

愛媛大学理工学研究科

Kinetics of phase transition and polyamorphism

Kazuhiro Fuchizaki

Ehime University

岡山大学異分野基礎科学研究所

Doping dependence of electronic structure andsuperconductivity in FeSe intercalated by organic molecules

Harald Jeschke

Okayama University

227 相転移キネティクスとポリアモルフィズム

ISSP Activity Report 2019228

有機分子をインターカレートした FeSe における Jeschke
電子構造および超伝導のドープ量依存性
Harald229 物性における数値繰り込み群法の応用
230

剛体球コロイド系における結晶核生成頻度の精
密な測定

231 非平衡初期緩和の温度スケーリングの一般化
232

フラストレート磁性体のスピン多極子ダイナミ
クスとスピン伝導233 相転移キネティクスとポリアモルフィズム

155

234

動的ヤンテラー効果を持つパイロクロア格子反強磁性ハイゼンベルグ模型における相転移

University of Hyogo

原田健自

京都大学大学院情報学研究科

Application of numerical renormalization group method in
condensed-matter physics

Kenji Harada

Kyoto University

田中

肇

東京大学生産技術研究所

Precise measurement of crystal nucleation rate in a hardsphere colloidal system

Hajime Tanaka

The University ofTokyo

物質・材料研究機構

Generalization of temperature scaling in early-timenonequilibrium relaxation

Yoshihiko Nonomura

National Institute forMaterials Science

野々村

禎彦

大西

弘明

日本原子力研究開発機構 先端基礎研究センター

Spin multipole dynamics and spin transport in frustrated
magnets

Hiroaki Onishi

Japan Atomic Energy
Agency渕崎

員弘

愛媛大学理工学研究科

Kinetics of phase transition and polyamorphism

Kazuhiro Fuchizaki

Ehime University

吉野

元Phase transitions of an antiferromagnetic Heisenberg spin
大阪大学サイバーメディアセンタ
model with a dynamical Jahn-Teller effect on a pyrochloreーlattice

Hajime Yoshino

Osaka University

156
ISSP Activity Report 2019

No.

課題名

235

シェル・モデルを用いた強誘電体の分子動力学
シミュレーション V

236

フラストレートした量子磁性体に対する熱ゆらぎの効果

237 摩擦の物理
238

電気二重層の形成により界面局在場を形成する
イオン液体の構造化とダイナミクスの解析

239 非対角固有状態熱化仮説に関する数値的研究

氏名

所属

橋本

保

下川

Title

Name

Organization

産業技術総合研究所

Molecular dynamics simulation of ferroelectrics using a shellmodel V

Tamotsu Hashimoto

AIST

統久朗

沖縄科学技術大学院大学

Thermal effect on the quantum frustrated magnetism

Tokuro Shimokawa

Okinawa Institute of
Science and Technology
Graduate University

松川宏

青山学院大学理工学部

Physics of Friction

Hiroshi Matsukawa

Aoyama Gakuin
University

福井賢一

大阪大学大学院基礎工学研究科

Analysis on Structuring and Dynamics of Ionic Liquid Forming
Ken-Ichi Fukui
Electric Double Layer as a Local Interfacial Field

Osaka University

伊與田

英輝

東京大学工学系研究科

Numerical analysis on the off-diagonal eigenstate
thermalization hypothesis

Eiki Iyoda

The University of
Tokyo

240

ハミルトニアン行列の低ランク行列近似を用いた全固有値計算と量子スピン系への応用

五十嵐亮

東京大学情報基盤センター

Full diagonalization using low-rank approximation to
Hamiltonian matrices and its application to quantum spinmodelsRyo Igarashi

The University of
Tokyo

241

空間構造をもつ一次元量子スピン系の数値的研
究

利根川

孝

神戸大学大学院理学研究科

Numerical Study of the One-Dimensional Quantum Spin
Systems with Spatial Studies

Takashi Tonegawa

Kobe University242

量子スピン系の低エネルギー状態に関する数値
的研究

中野

博生

兵庫県立大学大学院物質理学研究
Numerical study on low-energy states of quantum spin systems Hiroki Nakano
科University of Hyogo

田村亮

国立研究開発法人 物質・材料研
究機構

Effective model estimation using experimental results

Ryo Tamura

National Institute forMaterials Science

Hiroyuki Kumazoe

Kumamoto University

243 実験結果を入力とした有効モデル推定
244

スパース推定による広域 X 線吸収微細構造計測の解析手法の確立

熊添博之

熊本大学パルスパワー科学研究所

Establishment of new analysis method for extend X-ray
absorption fine structure with sparse modeling245

自由エネルギーランドスケープを用いた過冷却
液体とタンパク質のダイナミックスの研究

吉留崇

東北大学大学院工学研究科

Investigation of dynamics of a supercooled liquid and proteinsTakashi Yoshidome
using the free-energy landscapeTohoku University

246

分子動力学法による超臨界点近傍流体の物性評
価

渡辺

宙志

慶応義塾大学理工学部

Molecular dynamics study of the properties of near-criticalfluidsHiroshi Watanabe

Keio University247

ナノ構造下の電子状態制御：モデル化とその応
用

苅宿

俊風

物材機構

Manipulation of electronic states with nanostructures: model
construction and its application

Toshikaze Kariyado

NIMS

赤城

裕

東京大学 大学院理学系研究科

Novel Topological Excitation in Magnet

Yutaka Akagi

The University ofTokyo

248 磁性体模型における新規なトポロジカル励起249

遷移金属カルコゲナイド物質の CDW 相における村井
格子ダイナミクスの研究

直樹

日本原子力研究開発機構

Lattice dynamics investigation of a charge-density-wave phase
Naoki Murai
in transition metal chalcogenides

JAEA

250

階層性構造を有する有機材料の熱輸送スペクト
ルの解明

志賀

拓麿

東京大学大学院工学系研究科

Clarification of thermal transport spectra in hierarchicalstructured organic bulk materials

Takuma Shiga

The University of
Tokyo

251

反応力場を用いた炭素構造体中の水の分子動力
学計算

水口

朋子

京都工芸繊維大学

Molecular dynamics simulations of water confined in carbon
structures with the reactive force field

Tomoko Mizuguchi

Kyoto Institute ofTechnology

No.

課題名

氏名

252

Ｘ線多波回折によるタンパク質結晶構造解析法
の研究

253

d 波超伝導体における熱ホール角の増大に対する
北
研究

254

拡張アンサンブル法によるレナード・ジョーン
ズ粒子系の相転移の研究

沖津

康平
孝文

所属

Title

Name

Organization

Kouhei Okitsu

The University ofTokyo

東京大学 大学院工学系研究科

Study on an X-ray n-beam method to solve protein crystal
structure

北海道大学理学部物理学科

studying the enhancement of the thermal Hall angle in d-wave
Takafumi Kita
superconductors

Hokkaido University

岡本祐幸

名古屋大学大学院理学研究科

Study on phase transitions of Lennard-Jones fluid systems bygeneralized-ensemble algorithms

Yuko Okamoto

Nagoya University

岡本祐幸

名古屋大学大学院理学研究科

Study on complex systems by generalized-ensemble algorithms Yuko Okamoto

Nagoya University

田中

肇

東京大学生産技術研究所

Impact of hydrodynamic interactions on colloidal dynamics
near a critical point

Hajime Tanaka

The University ofTokyo

257 高次テンソル繰り込み群法の改善とその応用

森田悟史

東京大学物性研究所

Improvement of higher-order tensor renormalization groupmethod and its applications

Satoshi Morita

The University ofTokyo

258 分岐ネットワークの統計的性質

湯川諭

大阪大学大学院理学研究科

Statistical Properties in a Branching Network

Satoshi Yukawa

Osaka University

255 拡張アンサブル法による複雑系の研究
256

臨界点近傍のコロイドのダイナミクスに対する
流体力学的相互作用の影響

ISSP Activity Report 2019259

ブリージングパイロクロア反強磁性体における局所格子歪みと磁場効果

青山和司

大阪大学大学院理学研究科

Effects of a magnetic field on spin-lattice-coupled orders inbreathing pyrochlore antiferromagnets

Kazushi Aoyama

Osaka University

260

ソフトマテリアルの秩序構造とその光学的性質
の計算

福田

順一

九州大学

Calculation of ordered structures and their optical properties
of soft materials

Jun-Ichi Fukuda

Kyushu University261

コロイドのネットワーク状相分離の粗大化メカ
ニズム

田中

肇

東京大学生産技術研究所

Coarsening mechanism of network-forming phase separationin colloidal suspensions

Hajime Tanaka

The University of
Tokyo

262

ガラスの遅いダイナミクスの構造的起源に関す
る研究

田中

肇

東京大学生産技術研究所

Study on the structural origin of glassy slow dynamics

Hajime Tanaka

The University of
Tokyo

小野

頌太

岐阜大学

Femtosecond luminescence dynamics of metals

Shota Ono

Gifu University

飛田和男

埼玉大学大学院理工学研究科

Numerical Study of One Dimensional Frustrated Quantum Spin
Kazuo Hida
Systems

Saitama University安田千寿

琉球大学理学部

Magnetism in the system with the multiple-spin exchangeinteractions

Chitoshi Yasuda

University of the
Ryukyus

東北大学大学院工学研究科

Simulation analysis of collision of two filaments driven byprotein molecular motors

Kazuo Sasaki

Tohoku University

263 金属のフェムト秒発光ダイナミクス
264

１次元フラストレート量子スピン系の数値的研
究265 多スピン交換相互作用を含む系の磁性大学院理学研究院

157

266

タンパク質分子機械に駆動されるフィラメント
の二体衝突のシミュレーション

佐々木

267

粗視化 MD 法を用いた環動ゲルの動的力学物性
の解明

眞弓

皓一

東京大学大学院新領域創成科学研 Study on Dynamic Mechanical Properties of Slide-Ring Gels
using Coarse-Grained MD Simulations
究科

Koichi Mayumi

The University of
Tokyo

268

全原子 MD 法を用いたポリロタキサンの微視的ダイナミクスの解明

眞弓

皓一

東京大学大学院新領域創成科学研 Study on Microscopic Dynamics of Polyrotaxanes using FullAtomistic MD Simulations
究科

Koichi Mayumi

The University of
Tokyo

一夫

158

No.

課題名

氏名

Title

Name

Organization

物質・材料研究機構

Unified understanding of early-time nonequilibrium relaxationin Monte Carlo simulations

Yoshihiko Nonomura

National Institute forMaterials Science

ISSP Activity Report 2019269 モンテカルロ非平衡初期緩和の統一的理解

野々村

270 Patchy 粒子系に関する分子シミュレーション

寺尾貴道

岐阜大学工学部

Molecular simulation of patchy particles

Takamichi Terao

Gifu University

２次元反強磁性 XXZ モデルにおける古典スピン
青山
系の輸送現象和司

大阪大学大学院理学研究科

Transport properties of the antiferromagnetic classical XXZ
model in two dimensions

Kazushi Aoyama

Osaka University

271

禎彦

所属

272 統計力学手法による保磁力機構の解明

西野

正理

物質・材料研究機構

Elucidation of coercivity mechanism by statistical physicalapproaches

Masamichi Nishino

National Institute forMaterials Science

273 ペーストのメモリー効果の転移現象

中原明生

日本大学理工学部

Transition in the memory effect of paste

Akio Nakahara

Nihon University

分子動力学計算法と教師なし機械学習を使った
274 非晶質前駆体からの結晶形成機構の新しい解析
方法構築

灘

産業技術総合研究所

Construction of A New Method for Analysis of Crystallization
Mechanism from Amorphous Precursor Using Molecular Dynamics
Simulation Method and Unsupervised Machine Learning

Hiroki Nada

National Institute forAdvanced Industrial
Science and Technology

Effects of Dzyaloshinskii--Moriya interactions and structural
distortions on magnetic susceptibilities of spherical-kagome
spin-systems

Fukumoto Yoshiyuki

Tokyo University of
Science
KEK

浩樹

275

球体カゴメ系の一様帯磁率に対する
Dzyaloshinskii-Moriya 相互作用と歪みの影響

福元

好志

東京理科大学276

シリカガラスの圧力誘起相転移過程で出現する
不均質構造の解明

若林

大佑

高エネルギー加速器研究機構物質 Inhomogeneous structure of silica glass during the structuraltransformations under high pressure
構造科学研究所

Daisuke
Wakabayashi

277

二体自己無撞着法を用いた超構造強相関物質の超伝導の理論的研究

西口

和孝

Theoretical study for superconductivity in superstructured
神戸大学大学院科学技術イノベー
strongly correlated materials with two- particle self-consistent
ション研究科
approachKazutaka Nishiguchi Kobe University278

時間変調された外場の下での光双安定現象の量子ダイナミクス

白井達彦

早稲田大学グリーン・コンピュー The analysis of the dynamical response to the opticalbistability
ティング・システム研究機構

Tatsuhiko Shirai

Waseda University

279

ソフトマテリアルの秩序構造とその光学的性質
の計算

福田

順一

九州大学大学院理学研究院

Calculation of ordered structures and their optical properties
of soft materials

Jun-Ichi Fukuda

Kyushu University

280

相互作用のない電子格子系間に光によって生成される量子もつれ状態の性質

石田邦夫

宇都宮大学大学院工学研究科

Entanglement in remote electron-phonon systems created byphotoirradiation

Kunio Ishida

Utsunomiya University281

磁性薄膜における双極子相互作用と短距離相互
作用の競合

小松

尚登

物質・材料研究機構

Competiton between dipolar and short-range interactions on
the magnetic thin films

Hisato Komatsu

National Institute forMaterials Science282

フェムト秒領域における電子・格子・光相互作
用系の非断熱ダイナミクス

石田邦夫

宇都宮大学大学院工学研究科

Ultrafast nonadiabatic dynamics of electron-phonon-photon
systemKunio Ishida

Utsunomiya University283

空間構造をもつ一次元量子スピン系の数値的研
究

利根川

孝

神戸大学大学院理学研究科

Numerical Study of the One-Dimensional Quantum Spin
Systems with Spatial Structures

Takashi Tonegawa

Kobe University

284 熱伝導と熱輻射の統一的理解志賀拓麿

東京大学大学院工学系研究科

Compherensive study on transition between heat conduction
and radiative heat transfer

Takuma Shiga

The University ofTokyo

285 高密剛体球系における非平衡相転移と遅い緩和

礒部

雅晴

名古屋工業大学

Nonequilibrium phase transition and slow dynamics in thedense hard sphere systems

Masaharu Isobe

Nagoya Institute ofTechnology

No.

課題名

氏名

所属

Title

Name

Organization

286 フォノニック結晶の熱伝導解析

志賀拓麿

東京大学大学院工学系研究科

Heat conduction analysis for phononic crystal

Takuma Shiga

The University ofTokyo

球体カゴメ系の磁場中低温比熱に対する287 Dzyaloshinskii-Moriya 相互作用 とランダムネ
スの効果

福元

好志

東京理科大学

Effects of Dzyaloshinskii-Moriya interactions and exchange
randomness on low-temperature specific heats of sphericalkagome spin-systems

Fukumoto Yoshiyuki

Tokyo University of
Science288

横磁場イジングモデルにおける新規量子相の解
析

堀田

知佐

東京大学総合文化研究科

Numerical studies on some new phases of the transverse Ising
Chisa Hotta
model

The University of
Tokyo

289

イジングマシンの性能向上を指向した統計力学
研究

田中

宗

早稲田大学 グリーン・コンピューティング・システム研究機構

Study on Ising machines from a viewpoint of statisticalmechanics

Shu Tanaka

Waseda University

290

フラストレート型遍歴磁性体における多重 Q 状態の磁気構造内田尚志

北海道科学大学

Magnetic structures of multiple-Q states in frustrated itinerantmagnets

Takashi Uchida

Hokkaido Universityof Science291

グラフェンのディラックコーン周りにおける不均一電子分布の超高速緩和

小野

頌太

岐阜大学

Ultrafast relaxation of inhomogeneous electron distribution
around the Dirac cone in graphene

Shota Ono

Gifu University

292 Patchy 粒子系に関する分子シミュレーション

寺尾貴道

岐阜大学工学部

Molecular simulation of patchy particles

Takamichi Terao

Gifu University

磁性薄膜における双極子相互作用とDzyaloshinskii-Moriya 相互作用の競合

小松尚登

物質・材料研究機構

Competiton between dipolar and Dzyaloshinskii-Moriya
interactions on the magnetic thin films

Hisato Komatsu

National Institute forMaterials Science294 古典スピン系による磁化反転解析

檜原太一

東京大学理学系研究科

Magnetization reversal process in classical spin systems

Taichi Hinokihara

The University ofTokyo

295 X 線多波回折理論による結晶構造解析法の研究

沖津康平

東京大学 大学院工学系研究科

Study on crystal structure analysis using the X-ray multiplebeam diffraction theory

Kouhei Okitsu

The University ofTokyo

296 組織内での細胞誘導機構の数値的研究

松下勝義

大阪大学理学研究科

Numerical Study of Cell Guiding Mechanism in Cellular Tissue

Katsuyoshi
Matsushita

Osaka University

NISQ 量子コンピュータを用いた量子多体系の物
藤井
性計算のシミュレーション

啓祐

大阪大学

Quantum simulation for quantum many body systems using
noisy-intermediate-scale quantum computers

Keisuke Fujii

Osaka University

293

ISSP Activity Report 2019297

298 組織中の接着依存細胞ダイナミクス

松下勝義

大阪大学理学研究科

Adhesion Inducing Cell Dynamics in Tissue

Katsuyoshi
Matsushita

Osaka University

299 河川ネットワークの統計的性質

湯川諭

大阪大学大学院理学研究科

Statistical Properties of a River Network

Satoshi Yukawa

Osaka University
Nihon University

159

300

ペーストの振動と剪断と磁場の記憶効果のシミュレーション

中原明生

日本大学理工学部

Numerical simulation for memory of flow, vibration andmagnetic field in paste

Akio Nakahara

301

量子ビットシステムの欠陥になどに対するロバ
スト性の検証

棚本

哲史

帝京大学

Simulation regarding robustness of qubit system again defects

Tetsufumi Tanamoto Teikyo University

302

有向パーコレーション転移点近傍における界面の成長とゆらぎに関する数値的研究

深井洋佑

理化学研究所 生命機能科学研究センター

Numerical simulation of interfacial growth and fluctuation near
Yohsuke Fukai
the directed percolation transition

RIKEN

160

No.

課題名

氏名

所属

Title

ISSP Activity Report 2019303

ゼオライト合成中における原子再配列の理論的、
大久保
実験的検討

達也

東京大学大学院工学系研究科化学 Theoretical and experimental investigation on atomic
configuration in zeolite syntheses
システム

304

スピン・ボゾン模型の非マルコフ・ダイナミク
スの数値計算羽田野直道

東京大学生産技術研究所

305

正方格子反強磁性体 La2MO4(M = Cu, Ni) における非弾性光散乱

乗木

優作

舟木

306 相互作用粒子系の数値解析

Name

Organization

Tatsuya Okubo

The University ofTokyo

Numerical Calculations of Non-Markovian Dynamics of SpinBoson Models

Naomichi Hatano

The University ofTokyo

北海道大学大学院理学研究院

Inelastic light scattering in the square-lattice antiferromagnets
La2MO4$ (M = Cu, Ni)

Yusaku Noriki

Hokkaido University

直久

早稲田大学理工学術院

Numerical Analysis on Particle Interaction System

Tadahisa Funaki

Waseda University

307

曲がった初期条件のもとでの Kardar-ParisiZhang 普遍ゆらぎと変分公式

深井洋佑

理化学研究所 生命機能科学研究センター

Kardar-Parisi-Zhang universal fluctuation with curved initialconditions and variational formula

Yohsuke Fukai

RIKEN

308

厳密対角化による量子パイロクロア磁性体の研
究

門脇

広明

首都大学東京 理工学研究科

Exact diagonalization of quantum pyrochlore model

Hiroaki Kadowaki

Tokyo Metropolitan
University309

時間反転対称性の破れた超伝導体接合の数値解
析法の研究

田沼

慶忠

秋田大学大学院理工学研究科

Study on numerical analysis method of superconducting
junctions with broken time reversal symmetry states

Yasunari Tanuma

Akita University令和元年度 スーパーコンピュータ計算物質科学スパコン共用事業課題一覧/ Supercomputing Consortium for Computational Materials Science Project List of Supercomputer System 2019前期 / The first half term
No.

課題名

氏名

所属

ISSP Activity Report 20191

高機能半導体

押山

淳

名古屋大学

2

スピン軌道相互作用の大きな物質での量子スピ
ン液体相の追求

今田

正俊

早稲田大学

3

第一原理フェーズ・フィールド・マッピング

香山正憲

産業技術総合研究所

4重点課題 5「エネルギー変換 ( 化学エネルギー )

杉野

修

東京大学

5

電解質液体とガラスに潜む長距離ゆらぎと輸送特性の分子動力学計算

芝

隼人

6

交差検証を用いた解析接続結果に関する精度検証手法の開発吉見

7

第一原理計算を用いた有機伝導体における量子スピン液体の研究

8

Title

未来材料・シス Exploration of new-functionality and high-performancesemiconductor devices
テム研究所

Name

Organization

161

Atsushi Oshiyama

Nagoya University

Studies on Quantum Spin Liquids in Materials with Strong
Spin-Orbit Interaction

Masatoshi Imada

Waseda University

First-Principles Phase Field Mapping

Masanori Kohyama

National Institute ofAdvanced Industrial
Science and Technology

物性研究所

Priority project 5--- energy conversion (chemical energy)

Osamu Sugino

The University of
Tokyo

東北大学

金属材料研究所

Molecular dynamics study of long-ranged fluctuation andtransport properties of electrolyte and glassy liquids

Hayato Shiba

Tohoku University

一慶

東京大学

物性研究所

Development of accuracy verification method on analytic
continuation results using cross validation

Kazuyoshi Yoshimi

The University of
Tokyo

三澤

貴宏

東京大学

物性研究所

Numerical Study of Quantum Spin Liquid in Organic
Conductors using Ab initio Calculation

Takahiro Misawa

The University ofTokyo

光・電子融合デバイス

矢花

一浩

筑波大学

計算科学研究セ
Unified Photonic-Electronic Devices
ンター

Kazuhiro Yabana

University of Tsukuba

9

テンソルネットワーク法の物性物理学への応用

川島

直輝

東京大学

物性研究所

Application of Tensor Network Method to Condensed Matter
Physics

Naoki Kawashima

The University of
Tokyo

10

ポスト京課題７
の連携

遠山

貴巳

東京理科大学

理学部第一部

Cooperation Research with Big Experimental Facilities

Takami Tohyama

Tokyo University of
Science

11

エネルギーの変換・貯蔵 — 電気エネルギー：全
岡崎
電池シミュレータの基盤技術の開発研究

進

名古屋大学

Conversion and storage of energy - Fuel cells and secondary
大学院工学研究
batteries: Research and development of fundamental
科
technologies of battery simulators

Susumu Okazaki

Nagoya University

12

フラグメント分割型 GW/BSE 法の開発と有機光
藤田
電子材料への応用

貴敏

分子科学研究所

Takatoshi Fujita

Institute for Molecular
Science13

データ駆動型マテリアルデザインによる新機能
高エントロピー合金の探索

福島

鉄也

大阪大学

ナノサイエンス
Data-driven materials design for new functional high entropy
デザイン教育研
alloys究センター

Tetsuya Fukushima

Osaka University

14

二次電池材料の電子論

小口

多美夫

大阪大学

産業科学研究所 Electron Theory on Secondary-Battery Materials

Tamio Oguchi

Osaka University

サブ課題 G ④大型実験施設とDevelopment of Fragment-Based GW/BSE Method andApplication to Organic Optoelectronic Materials

162
ISSP Activity Report 2019

No.

課題名

氏名

15

貴金属フリーの汎用元素ナノ触媒に向けた第一
原理計算

武次

徹也

北海道大学

16

高性能永久磁石・磁性材料

三宅隆

産業技術総合研究所

17ナトリウム系濃厚電解液の動的挙動解析

山田

淳夫

東京大学

大学院工学系研
Dynamical analyses on electrolytes for Na-ion batteries
究科

Atsuo Yamada

The University of
Tokyo

18

Ｂ、Ｃ、Ｎを用いた電子デバイス新物質の設計
研究

斎藤

晋

東京工業大学

理学院

Materials design using B, C, and N for next-generation device

Susumu Saito

Tokyo Institute ofTechnology

19

磁性材料界面の第一原理計算

合田

義弘

東京工業大学

物質理工学院

First-principles study of magnetic-material interfaces

Yoshihiro Gohda

Tokyo Institute ofTechnology

20

複雑混相流動のマルチスケールシミュレーショ
ン

川勝

年洋

東北大学

大学院理学研究
Multiscale simulations on complex multiphase flows
科

Toshihiro Kawakatsu Tohoku University

21

複雑流体の分子動力学計算

野口

博司

東京大学

物性研究所

Molecular Dynamics Simulation of Complex Fluids

Hiroshi Noguchi

The University of
Tokyo

22

次世代計算機を対象とした超並列電子状態計算とデータ駆動科学の融合星

Massively parallel electronic structure calculation and datadriven science for next-generation supercomputers

Takeo Hoshi

Tottori University

Name

Organization

健夫

所属

Title

大学院理学研究 Ab initio study toward abundant element nanocatalysts withless precious metals
院

Name

Organization

Tetsuya Taketsugu

Hokkaido University

High performance permanent magnets and magnetic materials Takashi Miyake

鳥取大学大学院 工学研究科

National Institute ofAdvanced Industrial
Science and Technology

後期 / The second half term
No.

課題名

氏名

所属

23

高機能半導体

押山

淳

名古屋大学

24

第一原理ハミルトニアンに基づく分子性導体の量子スピン液体の研究

今田

正俊

早稲田大学

25

第一原理フェーズ・フィールド・マッピング

香山正憲

産業技術総合研究所

26

電解質液体に対する電圧引加シミュレーション

芝27

交差検証を用いた解析接続結果に関する精度検証手法の開発吉見

28

多変数変分モンテカルロ法を用いた動的構造因
子の計算

29

テンソルネットワーク法の物性物理学への応用

隼人

Title

未来材料・シス Exploration of new-functionality and high-performancesemiconductor devices
テム研究所

Atsushi Oshiyama

Nagoya University

Studies on quantum spin liquids in molecular conductors
based on first-principles Hamiltonian

Masatoshi Imada

Waseda University

First-Principles Phase Field Mapping

Masanori Kohyama

National Institute ofAdvanced Industrial
Science and Technology

Hayato Shiba

Tohoku University

東北大学

金属材料研究所 Simulation of electrolyte liquids under constant potential bias

一慶

東京大学

物性研究所

Development of accuracy verification method on analytic
continuation results using cross validation

Kazuyoshi Yoshimi

The University of
Tokyo

三澤

貴宏

東京大学

物性研究所

Development of numerical method for calculating dynamical
structure factors based on many-variable variational Monte
Carlo method

Takahiro Misawa

The University of
Tokyo

川島

直輝

東京大学

物性研究所

Application of Tensor Network Method to Condensed Matter
Physics

Naoki Kawashima

The University of
Tokyo

No.

課題名

氏名

所属

Title

Name

Organization

30

大規模 GW+BSE 法による有機光材料系の励起状
藤田
態計算

貴敏

分子科学研究所

31

複雑混相流動のマルチスケールシミュレーショ
ン

川勝

年洋

東北大学

大学院理学研究
Multiscale simulations on complex multiphase flows
科

Toshihiro Kawakatsu Tohoku University32

複雑流体の分子動力学計算

野口

博司

東京大学

物性研究所

Molecular Dynamics Simulation of Complex Fluids

Hiroshi Noguchi

The University of
Tokyo

33

Mg2SiO4 の超高圧相における秩序無秩序転移

飯高敏晃

理化学研究所

Order-disorder transition in the superhigh-pressure phase of
Mg2SiO4

Toshiaki Iitaka

RIKEN

34

次世代計算機を対象とした超並列電子状態計算とデータ駆動科学の融合

星

鳥取大学大学院 工学研究科

Massively parallel electronic structure calculation and datadriven science for next-generation supercomputers

Takeo Hoshi

Tottori University

35

分子動力学シミュレーションを用いた長鎖高分
子化学ポテンシャルの効率的な計算手法の開発

松林伸幸

Nobuyuki
Matubayasi

Osaka University

36

オーダー N 第一原理電子状態計算による三元系金属ナノクラスターの熱力学的構造安定性とNOx 触媒機構の研究

尾崎泰助

Taisuke Ozaki

The University of
Tokyo

健夫

Large-scale GW+BSE excited-state calculations for organic
optoelectronic materials

Development of calculation method of chemical potential for
大阪大学大学院 基礎工学研究科 long-chain polymer melt using all-atom molecular dynamics
simulation
Study on thermodynamic properties and NOx redox reactionsof ternary alloy nanoclusters by O(N) density functional
東京大学
物性研究所
calculations

Takatoshi Fujita

Institute for Molecular
Science

ISSP Activity Report 2019163

Publications
Division of Condensed Matter Science
Takigawa group
We have been performing nuclear magnetic resonance experiments on various quantum spin systems and strongly correlated
electron systems to explore novel quantum phases with exotic ordering and fluctuation phenomena. The major achievements inthe year 2019 include: (1) discovery of a novel tetragonal-orthorhombic-tetragonal sequence of continuous phase transition as afunction of temperature in the spin-orbit coupled metallic pyrochlore compound Cd2Re2O7 by 111Cd-NMR measurements, (2)observation of dipolar and octupolar orders in the 5d double-perovskite oxide Ba2MgReO6, in which strong spin-orbit couplingcombined with the cubic crystal field generates a quartet ground state with Jeff=3/2, providing ideal platform to explore multipolar order of t2g electron systems.
1.

*Field-Induced Switching of Ferro-Quadrupole Order Parameter in PrTi Al : T. Taniguchi, K. Hattori, M. Yoshida,
2 20

H. Takeda, S. Nakamura, T. Sakakibara, M. Tsujimoto, A. Sakai, Y. Matsumoto, S. Nakatsuji and M. Takigawa, J. Phys.
Soc. Jpn. 88 (2019) 084707(1-20).
2.

51V-NMR

3.

Field-Orientation Effect on Ferro-Quadrupole Order in PrTi2Al20: S. Kittaka, T. Taniguchi, K. Hattori, S. Nakamura,T. Sakakibara, M. Takigawa, M. Tsujimoto, A. Sakai, Y. Matsumoto and S. Nakatsuji, J. Phys. Soc. Jpn. 89 (2020)043701(1-5).

4.

Regular-triangle trimer and charge order preserving the Anderson condition in the pyrochlore structure of CsW2O6:
Y. Okamoto, H. Amano, N. Katayama, H. Sawa, K. Niki, R. Mitoka, H. Harima, T. Hasegawa, N. Ogita, Y. Tanaka,
M. Takigawa, Y. Yokoyama, K. Takehana, Y. Imanaka, Y. Nakamura, H. Kishida and K. Takenaka, Nat Commun 11(2020) 3144(1-8).

5.

PrTi2Al20 における強四極子秩序変数の磁場によるスイッチング - 磁場に依存する四極子間相互作用について -: 谷口 貴紀 ,服部 一匡 , 橘高 俊一郎 , 瀧川 仁 , 固体物理 55 (2020) 245-264.

study on the S= 1/2 square lattice antiferromagnet K2V3O8: H. Takeda, H. Yasuoka, M. Yoshida,
M. Takigawa, N. J. Ghimire, D. Mandrus and B. C. Sales, Phys. Rev. B 100 (2019) 054406.

Sakakibara group
We study magnetism and superconductivity of materials having low characteristic temperatures. These include heavy-electron
systems, quantum spin systems and frustrated spin systems. The followings are some selected achievements in the fiscal year
2019. (1) We examined the helimagnetic transition of the cubic chiral magnet EuPtSi by means of high-precision magnetization
measurements. At low fields, the temperature derivative of the magnetization dM/dT exhibits a sharp peak at TN(H), indicative of a first-order transition. By increasing H, the shape of dM/dT drastically changes above a certain field to an asymmetricstep-like function. The results provide strong evidence for a tricritical point. The first-order transition in this system is driven
by strong fluctuations of the order parameter whose component is large in number. (2) Ferroquadrupolar (FQ) transition in
PrTi2Al20 has been studied by means of angle-resolved specific heat and rotational magnetocaloric measurements. The FQ
transition occurring at 2 K is robust when H is applied along the [111]direction. By contrast, the FQ transition rapidly changes
to a crossover when H>1 T is applied off the [111] direction. The results can be reproduced by using a phenomenological modelin which an anisotropic field-dependent interaction between the quadrupole moments.
1.

*Field-Induced Switching of Ferro-Quadrupole Order Parameter in PrTi Al : T. Taniguchi, K. Hattori, M. Yoshida,
2 20

H. Takeda, S. Nakamura, T. Sakakibara, M. Tsujimoto, A. Sakai, Y. Matsumoto, S. Nakatsuji and M. Takigawa, J. Phys.
Soc. Jpn. 88 (2019) 084707(1-20).
2.

Fluctuation-Induced First-Order Transition and Tricritical Point in EuPtSi: T. Sakakibara, S. Nakamura, S. Kittaka,
M. Kakihana, M. Hedo, T. Nakama and Y. Onuki, J. Phys. Soc. Jpn. 88 (2019) 093701(1-5).

3.

†Superconductivity in PtSbS with a Noncentrosymmetric Cubic Crystal Structure: R. Mizutani, Y. Okamoto, H. Nagaso,

Y. Yamakawa, H. Takatsu, H. Kageyama, S. Kittaka, Y. Kono, T. Sakakibara and K. Takenaka, J. Phys. Soc. Jpn. 88(2019) 093709(1-4).
* Joint research among groups within ISSP.

164

ISSP Activity Report 2019

4.

†*Superconductivity of Electron-Doped NdOBiS by Substitution of Mixed-Valence Ce Ions: N. Kase, M. Matsumoto,2
K. Kondo, J. Gouchi, Y. Uwatoko, T. Sakakibara and N. Miyakawa, J. Phys. Soc. Jpn. 88 (2019) 103703(1-5).

5.

†Anisotropic magnetic-field response of quantum critical fluctuations in Ni-doped CeCoIn : M. Yokoyama, K. Suzuki,
5

6.

†Emergent critical phenomenon in spin-1/2 ferromagnetic-leg ladders: Quasi-one-dimensional Bose-Einstein conden-

7.

†*S=1/2 ferromagnetic Heisenberg chain in a verdazyl-based complex: N. Uemoto, Y. Kono, S. Kittaka, T. Sakakibara,

8.

*Giant Anisotropic Magnetoresistance due to Purely Orbital Rearrangement in the Quadrupolar Heavy Fermion

K. Tenya, S. Nakamura, Y. Kono, S. Kittaka and T. Sakakibara, Phys. Rev. B 99 (2019) 054506(1-6).

sate: Y. Kono, S. Kittaka, H. Yamaguchi, Y. Hosokoshi and T. Sakakibara, Phys. Rev. B 100 (2019) 054442(1-8).

T. Yajima, Y. Iwasaki, S. Miyamoto, Y. Hosokoshi and H. Yamaguchi, Phys. Rev. B 99 (2019) 094418(1-6).

Superconductor PrV2Al20: Y. Shimura, Q. Zhang, B. Zeng, D. Rhodes, R. Schönemann, M. Tsujimoto, Y. Matsumoto,
A. Sakai, T. Sakakibara, K. Araki, W. Zheng, Q. Zhou, L. Balicas and S. Nakatsuji, Phys. Rev. Lett. 122 (2019)
256601(1-6).
9.

†Quasiparticle Evidence for the Nematic State above T in Sr Bi Se : Y. Sun, S. Kittaka, T. Sakakibara, K. Machida,c
x 2 3

J. Wang, J. Wen, X. Xing, Z. Shi and T. Tamegai, Phys. Rev. Lett. 123 (2019) 027002(1-6).

10. *Unconventional field-induced spin gap in an S = 1/2 chiral staggered chain: J. Liu, S. Kittaka, R. D. Johnson,
T. Lancaster, J. Singleton, T. Sakakibara, Y. Kohama, J. van Tol, A. Ardavan, B. H. Williams, S. J. Blundell, Z. E.
Manson, J. L. Manson and P. A. Goddard, Phys Rev Lett 122 (2019) 057207(1-6).
11. *105Pd NMR and NQR study of the cubic heavy fermion system Ce3Pd20Si6: I. Jakovac, M. Horvatic, E. F. Schwier, A.
Prokofiev, S. Paschen, H. Mitamura, T. Sakakibara and M. S. Grbic, J. Phys.: Condens. Matter 32 (2020) 245601(1-7).
12. *Field-Orientation Effect on Ferro-Quadrupole Order in PrTi2Al20: S. Kittaka, T. Taniguchi, K. Hattori, S. Nakamura,T. Sakakibara, M. Takigawa, M. Tsujimoto, A. Sakai, Y. Matsumoto and S. Nakatsuji, J. Phys. Soc. Jpn. 89 (2020)043701(1-4).
13. †*Heavy Fermion State of YbNi2Si3 without Local Inversion Symmetry: S. Nakamura, K. Hyodo, Y. Matsumoto,Y. Haga, H. Sato, S. Ueda, K. Mimura, K. Saiki, K. Iso, M. Yamashita, S. Kittaka, T. Sakakibara and S. Ohara, J. Phys.
Soc. Jpn. 89 (2020) 024705(1-5).
14. †Magnetic properties of a spin-1/2 honeycomb lattice antiferromagnet: Y. Kono, T. Okabe, N. Uemoto, Y. Iwasaki,
Y. Hosokoshi, S. Kittaka, T. Sakakibara and H. Yamaguchi, Phys. Rev. B 101 (2020) 014437(1-6).
15. †Synthesis and Magnetic Properties of M2+Ti4+ Substituted Ba12Fe28Ti15O84: N. Yasuda, S. Kittaka, Y. Kono, T. Sakakibara, K. Kakizaki and K. Kamishima, J. Magn. Soc. Jpn. 44 (2020) 2005R004(1-5).
16. *Magnetization and Thermal Expansion Properties of Quantum Spin Ice Candidate Pr2Zr2O7: N. Tang, A. Sakai, K.
Kimura, S. Nakamura, M. Fu, Y. Matsumoto, T. Sakakibara and S. Nakatsuji, JPS Conf. Proc. 30 (2020) 011090(1-6).
17. *Single Crystal Growth and Unique Electronic States of Cubic Chiral EuPtSi and Related Compounds: Y. Ônuki,
M. Kakihana, W. Iha, K. Nakaima, D. Aoki, A. Nakamura, F. Honda, M. Nakashima, Y. Amako, J. Gouchi, Y. Uwatoko,
S. Nakamura, T. Sakakibara, T. Takeuchi, Y. Haga, H. Ikeda, H. Harima, M. Hedo and T. Nakama, JPS Conf. Proc. 29(2020) 012001(1-9).
18. *Unique Skyrmion Phases and Conduction Electrons in Cubic Chiral Antiferromagnet EuPtSi and Related Compounds:
Y. Ônuki, M. Kakihana, W. Iha, K. Nakaima, D. Aoki, A. Nakamura, F. Honda, M. Nakashima, Y. Amako, J. Gouchi,
Y. Uwatoko, S. Nakamura, T. Sakakibara, T. Takeuchi, Y. Haga, H. Ikeda, H. Harima, M. Hedo and T. Nakama, JPS
Conf. Proc. 30 (2020) 011008(1-11).

Mori group
We have successfully developed and unveiled unprecedented functional properties of the molecular materials. The majorachievements in 2019 are summarized as follows: (1) We unveiled the mechanism of anhydrous organic proton conduction
with dicarboxylic acids and imidazoles as an electrolyte of a fuel cell for medium temperatures. (2) We successfully fabricatedand characterized the transistor properties of di- and tetramethoxy benzothienobenzothiophenes with and without hydrogenbonding. (3) We constructed three- dimensional anionic molecular frameworks based on hydrogen-bonded metal dithiolene
complexes and reveal the solvent effect.
1.

†Charge Order and Poor Glass-forming Ability of an Anisotropic Triangular-lattice System, θ-(BEDT-TTF) TlCo(SCN) ,2
4
Investigated by NMR: K. Miyagawa, T. Sato, H. Hashimoto, M. Kodama, K. Ohnoh, A. Ueda, H. Mori and K. Kanoda,
J. Phys. Soc. Jpn. 88 (2019) 034705.

† Joint research with outside partners.

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2.

Hysteretic Current–Voltage Characteristics in the Deuterium-Dynamics-Triggered Charge-Ordered Phase of
κ-D3(Cat-EDT-TTF)2: A. Ueda, K. Kishimoto, Y. Sunairi, J. Yoshida, H. Yamakawa, T. Miyamoto, T. Terashige, H. Okamotoand H. Mori, J. Phys. Soc. Jpn. 88 (2019) 034710.

3.

†Dynamics of Water Molecules in a 3-Fold Interpenetrated Hydrogen-Bonded Organic Framework Based on Tetrakis(4-pyridyl)methane: D. Inokuchi, Y. Hirao, K. Takahashi, K. Matsumoto, H. Mori and T. Kubo, J. Phys. Chem. C 123 (2019)
6599.

4.

New π-extended catecholato complexes of Pt(II) and Pd(II) containing a benzothienobenzothiophene (BTBT) moiety:synthesis, electrochemical behavior and charge transfer properties: K. Tahara, Y. Ashihara, T. Higashino, Y. Ozawa,T. Kadoya, K. Sugimoto, A. Ueda, H. Mori and M. Abe, Dalton Trans. 48 (2019) 7367.

5.

†High-Temperature Cooperative Spin Crossover Transitions and Single-Crystal Reflection Spectra of [FeIII(qsal) ]2(CH3OSO3) and Related Compounds: K. Takahashi, K. Yamamoto, T. Yamamoto, Y. Einaga, Y. Shiota, K. Yoshizawa and
H. Mori, Crystals 9 (2019) 81.

6.

Construction of three-dimensional anionic molecular frameworks based on hydrogen-bonded metal dithiolene complexes
and the crystal solvent effect: S. Yokomori, A. Ueda, T. Higashino, R. Kumai, Y. Murakami and H. Mori, CrystEngComm 21(2019) 2940-2948.

7.

Di- and tetramethoxy benzothienobenzothiophenes: substitution position effects on the intermolecular interactions, crystal
packing and transistor properties: T. Higashino, A. Ueda and H. Mori, New J. Chem. 43 (2019) 884.

8.

†Strange metal from a frustration-driven charge order instability: T. Sato, K. Kitai, K. Miyagawa, M. Tamura, A. Ueda,
H. Mori and K. Kanoda, Nature Mater 18 (2019) 229.

9.

*Direct Evidence of Interfacial Hydrogen Bonding in Proton-Electron Concerted 2D Organic Bilayer on Au Substrate:
S. Yamamoto, H. S. Kato, A. Ueda, S. Yoshimoto, Y. Hirata, J. Miyawaki, K. Yamamoto, Y. Harada, H. Wadati, H. Mori,J. Yoshinobu and I. Matsuda, e-J. Surf. Sci. Nanotechnol. 17 (2019) 49-55.

10. †Anhydrous Purely Organic Solid-State Proton Conductors: Effects of Molecular Dynamics on the Proton Conductivity of
Imidazolium Hydrogen Dicarboxylates: Y. Sunairi, S. Dekura, A. Ueda, T. Ida, M. Mizuno and H. Mori, J. Phys. Soc. Jpn. 89(2020) 051008.
11.

*A computational examination of the electric-field-induced proton transfer along the interface hydrogen bond between
proton donating and accepting self-assembled monolayers: Y. Kanematsu, H. S. Kato, S. Yoshimoto, A. Ueda, S. Yamamoto,H. Mori, J. Yoshinobu, I. Matsuda and M. Tachikawa, Chem. Phys. Lett. 741 (2020) 137091.

12. 有機結晶を舞台としたπ電子 -プロトンカップリング物性の新展開 : 森 初果 , 日本物理学会誌 74、No2 (2019) 82-92.

Osada group
Although the topological phases are difficult to be realized in organic molecular crystals, we demonstrate here that theycan emerge in the τ-type organic layered conductors, τ-(EDO-S,S-DMEDT-TTF)2X1+y and τ-(P-S,S-DMEDT-TTF)2X1+y(X=AuBr2, I3, IBr2). The conducting layers of these conductors have a highly symmetric checkerboard structure, which canbe regarded as a modified Mielke lattice. Because their electronic structure inherits that of the Mielke lattice, their conduction
and valence bands exhibits the quadratic band touching. The contact point splits into a pair of Dirac cones under uniaxial strain
which breaks C4-symmetry. In τ-type conductors, we can expect rather large spin-orbit coupling (SOC) as organic conductors.
We show that the SOC in this case opens a topologically nontrivial gap at the band contact point, and the helical edge states
exist in the gap. The actual τ-type conductors could be regarded as heavily-doped topological insulators, which could exhibit
finite spin Hall effect.
1.

Topological Properties of τ-Type Organic Conductors with a Checkerboard Lattice: T. Osada, J. Phys. Soc. Jpn. 88(2019) 114707(1-7).

2.

Anisotropy of Dirac cones and Van Hove singularity in an organic Dirac fermion system: A. Mori, M. Sato, T. Yajima,
T. Konoike, K. Uchida and T. Osada, Phys. Rev. B 99 (2019) 035106(1-5).

3.

†Highly anisotropic interlayer magnetoresitance in ZrSiS nodal-line Dirac semimetal: M. Novak S. N. Zhang,

F. Orbanic, N. Biliskov, G. Eguchi, S. Paschen, A. Kimura, X. X. Wang, T. Osada, K. Uchida, M. Sato, Q. S. Wu, O. V.
Yazyev and I. Kokanovi, Phys. Rev. B 100 (2019) 085137(1-7).
4.

Quantum Hall Effect and Spin-Orbit Interaction: T. Osada, in: Physics and Chemistry of Graphene: Graphene to
Nanographene (Second Edition), Ch 7.1, edited by Toshiaki Enoki and Tsuneya Ando, (Jenny Stanford Publishing Pte.
Ltd., Singapore, 2019), 501-526.

* Joint research among groups within ISSP.

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5.

黒リン超薄膜の電子構造と物性 : 長田 俊人 ,「グラフェンから広がる二次元物質の新技術と応用」, 第 6 章 10 節 , 吾郷浩樹・
齋藤理一郎 , ( エヌ・ティー・エス , 東京 , 2020), 437-443.

Yamashita group
We have been studying (1) quantum criticality in heavy-fermion materials by ultra-low temperature cryostat, (2) thermal-Hall
conductivity of exotic excitations in frustrated magnets and (3) a new technique for the study of strongly-correlated electron
systems. In this year, we have performed (1) additional measurements of dHvA and Co NMR of CeCoIn5 at ultralow temperatures, (2) thermal Hall measurements of another kagome compound, Cd kapellasite, (3) transport measurements of a chiralmaterial Te, and (4) thermal transport studies of a chiral magnet CsCuCl3.
1.

*Thermal-transport studies of kagomé antiferromagnets: M. Y. M. Akazawa, M. Shimozawa, T. Shibauchi, Y. Matsuda,

H. Ishikawa, T. Yajima, Z. Hiroi, M. Oda, H. Yoshida, H.-Y. Lee, J. H. Han and N. Kawashima, J. Phys.: Condens.
Matter 32 (2019) 074001(11pp).
2.

Boundary-limited and Glassy-like Phonon Thermal Conduction in EtMe3Sb[Pd(dmit)2]2: M. Yamashita, J. Phys. Soc.
Jpn. 88 (2019) 083702.

3.

Thermal-transport studies of kagomé antiferromagnets: M. Yamashita, M. Akazawa, M. Shimozawa, T. Shibauchi,
Y. Matsuda, H. Ishikawa, T. Yajima, Z. Hiroi, M. Oda, H. Yoshida, H.-Y. Lee, J. H. Han and N. Kawashima, J. Phys.:
Condens. Matter 32 (2020) 074001.

4.

†*Heavy Fermion State of YbNi Si without Local Inversion Symmetry: S. Nakamura, K. Hyodo, Y. Matsumoto,2 3

Y. Haga, H. Sato, S. Ueda, K. Mimura, K. Saiki, K. Iso, M. Yamashita, S. Kittaka, T. Sakakibara and S. Ohara, J. Phys.
Soc. Jpn. 89 (2020) 024705(1-5).
5.

π 電子とプロトンの連動による新しい量子液体状態―絶対零度まで揺らぎ続ける電気・磁気双極子―（解説記事）: 下澤雅明・上田顕・橋本顕一郎・中惇 , 固体物理 54 (2019) 43.

Division of Condensed Matter Theory
Tsunetsugu group
We have studied the dynamics of charge density wave order in organic compounds 1T-TaSe2 upon laser pulse irradiation. Calculating the time evolution of electronic states and lattice distortions, we have shown the melting of charge density wave orderand difference in time scale between electron and lattice degrees of freedom. Lattice distortions continue to proceed even after
the laser irradiation ends. We continued the study of spin current under ac electric field. The effects of lattice disorders in highharmonic generation have also been investigated.
1.

High-harmonic generation by electric polarization, spin current, and magnetization: T. N. Ikeda and M. Sato, Phys. Rev.
B 100 (2019) 214424.

2.

Photoinduced Dynamics of Commensurate Charge Density Wave in 1T-TaS2 Based on Three-Orbital Hubbard Model:
T. N. Ikeda, H. Tsunetsugu and K. Yonemitsu, Appl. Sci. 9 (2019) 70.

3.

Generation of DC, AC, and Second-Harmonic Spin Currents by Electromagnetic Fields in an Inversion-Asymmetric
Antiferromagnet: T. N. Ikeda, Condens. Matter 4 (2019) 92.

4.

Generalized hydrodynamic approach to charge and energy currents in the one-dimensional Hubbard model: Y. Nozawa
and H. Tsunetsugu, Phys. Rev. B 101 (2020) 035121.

5.

*Efficient Terahertz Harmonic Generation with Coherent Acceleration of Electrons in the Dirac Semimetal Cd As :3 2

B. Cheng, N. Kanda, T. N. Ikeda, T. Matsuda, P. Xia, T. Schumann, S. Stemmer, J. Itatani, N. P. Armitage and R. Matsunaga, Phys. Rev. Lett. 124 (2020) 117402.
6.

Multivalley Free Energy Landscape and the Origin of Stripe and Quasi-Stripe CDW Structures in Monolayer MX2
Compounds: K. Nakatsugawa, S. Tanda and T. N. Ikeda, Sci. Rep. 10 (2020) 1239.

7.

General description for nonequilibrium steady states in periodically driven dissipative quantum systems: T. N. Ikeda and
M. Sato, Science Advances 6 (2020) eabb4019.

8.

Disorder effects on the origin of high-order harmonic generation in solids: K. Chinzei and T. N. Ikeda, Phys. Rev.
Research 2 (2020) 013033.
† Joint research with outside partners.

ISSP Activity Report 2019167

Kato group
The main research subject of Kato Lab. is transport properties in mesoscopic devices. We have studied (1) spin-current andits noise at the interface between a ferromagnetic insulator and a metal (or a superconductor), (2) microwave scattering inthe subohmic spin-boson system, (3) subband picture of high-harmonic generation, and (4) Bell-state correlation in a Kondo
quantum dot.
1.

Surface plasmon polaritons in thin-film Weyl semimetals: T. Tamaya, T. Kato, K. Tsuchikawa, S. Konabe and
S. Kawabata, J. Phys.: Condens. Matter 31 (2019) 305001(1-10).

2.

Microwave Scattering in the Subohmic Spin-Boson Systems of Superconducting Circuits: T. Yamamoto and T. Kato,
J. Phys. Soc. Jpn. 88 (2019) 094601(1-8).

3.

Adiabatic almost-topological pumping of fractional charges in noninteracting quantum dots: M. Hasegawa, &. Jussiau
and R. S. Whitney, Phys. Rev. B 100 (2019) 125420.

4.

Bell-state correlations of quasiparticle pairs in the nonlinear current of a local Fermi liquid: R. Sakano, A. Oguri,
Y. Nishikawa and E. Abe, Phys. Rev. B 99 (2019) 155106(1-7).

5.

Microscopic theory of spin transport at the interface between a superconductor and a ferromagnetic insulator: T. Kato,
Y. Ohnuma, M. Matsuo, J. Rech, T. Jonckheere and T. Martin, Phys. Rev. B 99 (2019) 144411(1-8).

6.

Signature of the transition to a bound state in thermoelectric quantum transport: &. Jussiau, M. Hasegawa and R. S.
Whitney, Phys. Rev. B 100 (2019) 115411(1-13).

7.

Subband picture of high-harmonic generation in solids: T. Tamaya and T. Kato, Phys. Rev. B 100 (2019) 081203(R)(1-6).

8.

Quantum Noise in Carbon Nanotubes as a Probe of Correlations in the Kondo Regime: M. Ferrier, R. Delagrange,
J. Basset, H. Bouchiat, T. Arakawa, T. Hata, R. Fujiwara, Y. Teratani, R. Sakano, A. Oguri, K. Kobayashi and
R. Deblock, J. Low Temp. Phys. - (2019) 1-34.

9.

*mVMC—Open-source software for many-variable variational Monte Carlo method: T. Misawa, S. Morita, K. Yoshimi,

M. Kawamura, Y. Motoyama, K. Ido, T. Ohgoe, M. Imada and T. Kato, Computer Physics Communications 235 (2019)
447.

10. Geometrical Optimization of Pumping Power under Adiabatic Parameter Driving: M. Hasegawa and T. Kato, J. Phys.
Soc. Jpn. 89 (2020) 064706.
11. Effects of Tunnel-coupling Asymmetries on Fermi-liquid Transport through an Anderson Impurity: K. Tsutsumi,
Y. Teratani, A. Oguri and R. Sakano, JPS conf. ser. 30 (2020) 011174(1-6).
12. 電流によって誘起される超伝導ドメイン : 加藤 岳生 , 固体物理 54 (2019) 451-457.
13. 非平衡状態にある近藤効果（その 2）近藤効果入門 1: 阪野 塁 , 小栗 章 , 固体物理 55 (2020) 47-54.

Division of Nanoscale Science
Katsumoto group
By using spin-polarized quantum Hall edge channels, we proposed and experimentally confirmed a simple way to manipulate spins of electrons propagating over the channels by voltages applied on micro-fabricated gates. In the transport of double
quantum well structures with (n-i-p-i-n)-type modulation doping, we found strong radio-frequency oscillation of current in thenegative resistance regions. Whether this is an intrinsic effect coming from meta-stable charge states or an extrinsic circuit oscillation, is the next issue in this study.
1.

Evidence for Spin-Triplet Electron Pairing in the Proximity-Induced Superconducting State of an Fe-Doped InAs
Semiconductor: T. Nakamura, L. D. Anh, Y. Hashimoto, S. Ohya, M. Tanaka and S. Katsumoto, Phys. Rev. Lett. 122(2019) 107001.

2.

†Laser-Beam-Patterned TopologicalInsulating States on Thin Semiconducting MoS2: H. Mine, A. Kobayashi,
T. Nakamura, T. Inoue, S. Pakdel, D. Marian, E. Gonzalez-Marin, S. Maruyama, S. Katsumoto, A. Fortunelli, J. J.
Palacios and J. Haruyama, Phys. Rev. Lett. 123 (2019) 146803.

* Joint research among groups within ISSP.

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3.

†Edge-derived magnetisms in very thin non-doped Bi Te nanomesh: T. Kobayashi, H. Mine, T. Tokuda, Y. Hashimoto,
2 3
S. Katsumoto and J. Haruyama, Appl. Phys. Lett. 115 (2019) 093101.

4.

Spin Filtering Magnetoresistance in Double‐Well Resonant Structures: T. Nakamura, Y. Hashimoto, T. Ke and S. Katsumoto, Phys. Status Solidi B 256 (2019) 1800560.

5.

*Strain-induced spontaneous Hall effect in an epitaxial thin film of a Luttinger semimetal: T. Ohtsuki, Z. Tian, A. Endo,

M. Halim, S. Katsumoto, Y. Kohama, K. Kindo, M. Lippmaa and S. Nakatsuji, Proc. Natl. Acad. Sci. USA 116 (2019)8803-8808.

6.

Spatial distribution of thermoelectric voltages in a Hall-bar shaped two-dimensional electron system under a magnetic
field: A. Endo, K. Fujita, S. Katsumoto and Y. Iye, J. Phys. Commun. 3 (2019) 055005(1-19).

7.

*Extracting the Chiral Contribution to the Negative Longitudinal Magnetoresistance in Epitaxial Pr Ir O Thin Films:
2 2 7

T. Ohtsuki, Z. Tian, A. Endo, M. Halim, S. Katsumoto, Y. Kohama, K. Kindo, M. Lippmaa and S. Nakatsuji, JPS Conf.
Proc. 30 (2020) 011181(1-6).
8.
9.

† 微量微粒子修飾がもたらすグラフェンのトポロジカル絶縁体転移 : 春山 純志 , 勝本 信吾 , 中村 壮智 , 日本物理学会誌

74 (2019) 839-844.

薄膜材料の電気特性 : 勝本 信吾 , 「2020 年版薄膜作製応用ハンドブック」, 第 2 章 , 權田俊一 , (NTS 出版 , 東京 ,2020), 39-79.

Otani group
We have studied the following topics this year; spin conversion behaviors in bulk, the interfaces and the surfaces, electricfield controlled spin-wave dynamics in ultrathin ferromagnetic films, and photoinduced Rashba spin to charge conversion. In
the first topic, we have discovered a novel magnetic spin Hall effect and its inverse in a Weyl antiferromagnet Mn3Sn, whichshows a unique property of spin Hall effect with broken time-reversal symmetry. This finding is a remarkable achievement in
antiferromagnetic spintronics achieved via collaboration with the Nakatsuji group at ISSP. We have performed spin absorption
measurements so that we obtained the spin diffusion length of about 1 nm for Mn3Sn polycrystals. From the continued study
on the inverse Edelstein effect of a copper surface decorated with a lead phthalocyanine molecule, we found that the Cu surface
decoration with a lead phthalocyanine monolayer gives rise to a maximum inverse Edelstein effect. Furthermore, we havediscovered significant photoinduced spin-to-charge conversion via Rashba spin splitting in an unoccupied state above the Fermi
level at the Cu/Bi2O3 interface. In terms of magnetization dynamics, we had an opportunity to write a review article highlighting
recent progress in the development of electric-field-controlled magnonic devices, including present challenges, future perspectives, and the scope for further improvement.
1.

Electric field control of spin waves in ultrathin CoFeB films: B. Rana, S. Choudhury, K. Miura, H. Takahashi,
A. Barman and Y. Otani, Phys. Rev. B 100 (2019) 224412(1-9).

2.

*Evaluation of spin diffusion length and spin Hall angle of the antiferromagnetic Weyl semimetal Mn Sn: P. K. Muduli,
3

3.

Relation between spin Hall effect and anomalous Hall effect in 3d ferromagnetic metals: Y. Omori, E. Sagasta, Y. Niimi,
M. Gradhand, L. E. Hueso, F. Casanova and Y. Otani, Phys. Rev. B 99 (2019) 014403.

4.

Two-dimensional electron gas in a metal/amorphous oxide interface with spin-orbit interaction: J. M. Flores-Camacho,
J. Puebla, F. Auvray, A. Lastras-Martínez, Y. Otani and R. E. Balderas-Navarro, Phys. Rev. B 100 (2019) 235449(1-11).

5.

Enhanced spin-to-charge current conversion at metal/oxide interfaces by lowering the temperature: H. Tsai, K. Kondou
and Y. Otani, Jpn. J. Appl. Phys. 58 (2019) 110907(1-4).

6.

Photoinduced Rashba Spin-to-Charge Conversion via an Interfacial Unoccupied State: J. Puebla, F. Auvray,
N. Yamaguchi, M. Xu, S. Z. Bisri, Y. Iwasa, F. Ishii and Y. Otani, Phys. Rev. Lett. 122 (2019) 256401.

7.

*Magnetic and magnetic inverse spin Hall effects in a non-collinear antiferromagnet: M. Kimata, H. Chen, K. Kondou,

T. Higo, T. Nishikawa, D. Qu, H. Isshiki, K. Kondou, D. Nishio-Hamane, S. Nakatsuji and Y. Otani, Phys. Rev. B 99
(2019) 184425.

S. Sugimoto, P. K. Muduli, M. Ikhlas, Y. Omori, T. Tomita, A. H. MacDonald, S. Nakatsuji and Y. Otani, Nature 565(2019) 627.

8.

*Realization of Spin-dependent Functionality by Covering a Metal Surface with a Single Layer of Molecules: H. Isshiki,
K. Kondou, S. Takizawa, K. Shimose, T. Kawabe, E. Minamitani, N. Yamaguchi, F. Ishii, A. Shiotari, Y. Sugimoto,
S. Miwa and Y. Otani, Nano Lett. 19 (2019) 7119-7123.

9.

Towards magnonic devices based on voltage-controlled magnetic anisotropy: B. Rana and Y. Otani, Commun Phys 2† Joint research with outside partners.

ISSP Activity Report 2019169

(2019) 90(1-12).
10. *Effect of sample size on anomalous Nernst effect in chiral antiferromagnetic Mn3Sn devices: H. Narita, T. Higo,
M. Ikhlas, S. Nakatsuji and Y. Otani, Appl. Phys. Lett. 116 (2020) 072404.
11. *Magneto-optical Kerr effect in a non-collinear antiferromagnet Mn 3 Ge: M. Wu, H. Isshiki, T. Chen, T. Higo, S. Nakatsuji and Y. Otani, Appl. Phys. Lett. 116 (2020) 132408.
12. *Electrical manipulation of a topological antiferromagnetic state: H. Tsai, T. Higo, K. Kondou, T. Nomoto, A. Sakai,
A. Kobayashi, T. Nakano, K. Yakushiji, R. Arita, S. Miwa, Y. Otani and S. Nakatsuji, Nature 580 (2020) 608-613.
13. *Structural and magnetic properties of Mn3Ge films with Pt and Ru seed layers: A. Kobayashi, T. Higo, S. Nakatsuji and
Y. Otani, AIP Advances 10 (2020) 015225(1-6).
14. Phase boundary exchange coupling in the mixed magnetic phase regime of a Pd-doped FeRh epilayer: J. R. Massey,
K. Matsumoto, M. Strungaru, R. C. Temple, T. Higo, K. Kondou, R. F. L. Evans, G. Burnell, R. W. Chantrell, Y. Otani
and C. H. Marrows, Phys. Rev. Materials 4 (2020) 024403(1-11).
15. Propagation dynamics of spin excitations along skyrmion strings: S. Seki, M. Garst, J. Waizner, R. Takagi, N. D. Khanh,
Y. Okamura, K. Kondou, F. Kagawa, Y. Otani and Y. Tokura, Nat Commun 11 (2020) 256.

Komori group
Kondo effect of a Co adatom on the lattice-compressed clean Cu(001) surface is investigated using scanning tunneling microscopy/spectroscopy (STM/STS) on partially nitrogen-adsorbed surface. The Kondo temperature TK observed in the tunnelingspectrum decreases when the lattice is laterally compressed by the surrounding N-adsorbed areas. According to the resultsof our density functional calculations, the Co adatom position shifts toward the vacuum owing to the lateral lattice compression. Thus, the decrease of TK is attributed to that of the hybridization strength between the adatom and substrate Cu atoms.
Electronic states of the Sn atomic layer intercalated between graphene and the substrate SiC(0001) are studied by spin- andangle-resolved photoelectron spectroscopy. Two types of spin-polarized band splits, Rushba and Zeeman types, are found at
the K point. This is due to the difference in the symmetry of the charge density. Growth and ferromagnetic properties of Fe2N
monatomic layers grown on Cu(111) are studied by STM/STS and soft X-ray magnetic circular dichroism. The magnetic
moment and the coercive force are smaller than the Fe2N monolayer on Cu(001) because of the strong hybridization with the Cu
substrate.
1.

Electronic and magnetic properties of the Fe2N monolayer film tuned by substrate symmetry: T. Hattori, T. Miyamachi,
T. Yokoyama and F. Komori, J. Phys.: Condens. Matter 31 (2019) 255001.

2.

†*Coexistence of Two Types of Spin Splitting Originating from Different Symmetries: K. Yaji, A. Visikovskiy, T. Iimori,

3.

†Fabrication of L1 -FeNi by pulsed-laser deposition: M. Saito, H. Ito, Y. Suzuki, M. Mizuguchi, T. Koganezawa,
04.

*Ultrafast Unbalanced Electron Distributions in Quasicrystalline 30° Twisted Bilayer Graphene: T. Suzuki, T. Iimori,K. Kuroda, S. Hayashi, T. Kajiwara, S. Tanaka, F. Komori and S. Shin, Phys. Rev. Lett. 122 (2019) 126403.

T. Miyamachi, F. Komori, K. Takanashi and M. Kotsugi, Appl. Phys. Lett. 114 (2019) 072404.

S. J. Ahn, Y. Zhao, M. Watanabe, J. Xu, M. Fujisawa, T. Kanai, N. Ishii, J. Itatani, K. Suwa, H. Fukidome, S. Tanaka,
J. R. Ahn, K. Okazaki, S. Shin, F. Komori and I. Matsuda, ACS Nano 13 (2019) 11981.
5.

Dynamic Interface Formation in Magnetic Thin Film Heterostructures: S. Nakashima, T. Miyamachi, Y. Tatetsu,
Y. Takahashi, Y. Takagi, Y. Gohda, T. Yokoyama and F. Komori, Adv. Funct. Mater. 29 (2019) 1804594.

6.

†Fabrication of L1 -type FeCo ordered structure using a periodic Ni buffer layer: H. Ito, M. Saito, T. Miyamachi,
07.

†*Giant Rashba system on a semiconductor substrate with tunable Fermi level: Bi/GaSb(110)-(2×1): T. Nakamura,

F. Komori, T. Koganezawa, M. Mizuguchi and M. Kotsugi, AIP Advances 9 (2019) 045307.

Y. Ohtsubo, N. Tokumasu, P. L. Fèvre, F. Bertran, S.-I. Ideta, K. Tanaka, K. Kuroda, K. Yaji, A. Harasawa, S. Shin,
F. Komori and S.-I. Kimura, Phys. Rev. Materials 3 (2019) 126001(1-7).
8.

Sensing surface lattice strain with Kondo resonance of single Co adatom: K. Iwata, T. Miyamachi, E. Minamitani and
F. Komori, Appl. Phys. Lett. 116 (2020) 051604(1-4).

9.

†Twisted bilayer graphene fabricated by direct bonding in a high vacuum: H. Imamura, A. Visikovskiy, R. Uotani,

T. Kajiwara, H. Ando, T. Iimori, K. Iwata, T. Miyamachi, K. Nakatsuji, K. Mase, T. Shirasawa, F. Komori and
S. Tanaka, Appl. Phys. Express 13 (2020) 075004(1-5).
10. *Edge-state correlation accelerates metal-insulator transition in topological semimetal nanofilms: S. Ito, M. Arita,* Joint research among groups within ISSP.

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J. Haruyama, B. Feng, W. -C. Chen, H. Namatame, M. Taniguchi, C. -M. Cheng, G. Bian, S. -J. Tang, T. -C. Chiang,
O. Sugino, F. Komori and I. Matsuda, Science Advances 6 (2020) eaaz5015 (7 pages).
11. Realizing large out-of-plane magnetic anisotropy in L10 FeNi films grown by nitrogen-surfactant epitaxy on Cu(001):
K. Kawaguchi, T. Miyamachi, T. Iimori, Y. Takahashi, T. Hattori, T. Yokoyama, M. Kotsugi and F. Komori, Phys. Rev.
Materials 4 (2020) 054403(1-7).
12. *Fully spin-polarized bulk states in ferroelectric GeTe: J. Krempaský, M. Fanciulli, L. Nicolaï, J. Minár, H. Volfová,
O. Caha, V. V. Volobuev, J. Sánchez-Barriga, M. Gmitra, K. Yaji, K. Kuroda, S. Shin, F. Komori, G. Springholz and J.
Hugo Dil, Phys. Rev. Research 2 (2020) 013107(1-7).
13. Hexagonal iron nitride monolayer on Cu(001): Zigzag-line-in-trough alignment: M. Yamada, K. Ienaga, Y. Takahashi,
T. Miyamachi and F. Komori, Surface Science 700 (2020) 121679.

Hasegawa group
We have on-going three projects using scanning tunneling microscopy (STM); the first one is on surface superconductivity
using low temperature STM, the second is on nano-scale spin detection using spin-polarized STM, and the last is on local transport properties using scanning tunneling potentiometry (STP). Concerning surface superconductivity, we recently found thatthe out-of-plane critical magnetic field is strongly enhanced when the surface area is confined with surface steps less than thecoherence length. We systematically investigated the width dependence of the critical field and found that the dependence is
explained well with Ginzburg-Landau theory. Then in order to extend the enhancement to macroscopic scale we used a vicinal
substrate and found the enhancement of the whole area on the surface superconductivity formed on it. Since the ultimately thinsuperconductors are already tolerant against in-plane magnetic field, our approach opens up a new way to make superconductors
strong against magnetic fields in all directions. We are now developing a new local method to probe spin dynamics of nano-size
structures including single atoms/molecules by detecting electron/ferromagnetic resonances based on spin-polarized STM. This
year, we introduced radio-frequency (RF) cables into the STM head and successfully detected response of the RF irradiation in
spin-polarized tunneling current. We are now adjusting the system and hopefully detect the resonance signals soon. Last year,
we implemented a function of scanning tunneling potentiometry (STP) into a ultrahigh vacuum (UHV) STM setup, obtained
electrochemical potential mappings on a clean silicon surface, and successfully measured electrical resistivity of single heightsteps on it. In order to improve the versatility, this year, we implemented the function into a low-temperature STM setup andfound it works well. We plan to reveal quantum transport phenomena including spin’s using the low-temperature STP in the next
year.
1.

Role of one-dimensional defects in the electrical transport through Si(111)−7×7 surface states: M. Hamada and
Y. Hasegawa, Phys. Rev. B 99 (2019) 125402(1-5).

2.

Bulk ferromagnetic tips for spin-polarized scanning tunneling microscopy: M. Haze, H.-H. Yang, K. Asakawa,
N. Watanabe, R. Yamamoto, Y. Yoshida and Y. Hasegawa, Rev. Sci. Instrum. 90 (2019) 013704(1-5).

3.

Defect-induced electronic structures on SnSe surfaces: K. Asakawa, F. Oguro, Y. Yoshida, H. Sakai, N. Hanasaki and
Y. Hasegawa, Jpn. J. Appl. Phys. 58 (2019) SIIA06(1-3).

4.

走査トンネル顕微鏡による起動秩序の直接観察：物質表面に現れる新たな秩序 : 吉田 靖雄 , H. Kim, C.-C. Lee, 長谷川幸雄 , 固体物理 54 (2019) 19-28.

5.

*Scanning tunneling microscopy on cleaved Mn Sn(0001) surface: H.-H. Yang, C.-C. Lee, Y. Yoshida, M. Ikhlas,
3

T. Tomita, A. Nugroho, T. Ozaki, S. Nakatsuji and Y. Hasegawa, Sci. Rep. 9 (2019) 9677(1-7).

Lippmaa group
A common feature of our research topics this year is the design of oxide crystal surfaces and surface layers. In collaboration with partners in Norway we studied the formation of interface layers on (111)-oriented polar perovskite surfaces. We
determined the surface structure of water-etched LaAlO3 crystals by ion scattering spectroscopy in collaboration with Koreancolleagues. We studied the electronic properties of oxide surface quantum wells, and depth-graded electron-doped SrTiO3,
demonstrating that nanoscale carrier profile changes can be useful for efficient photogenerated charge extraction from an oxide
semiconductor. We have also contributed to the design of new oxide film growth techniques, such as rapid beam-deflection
PLD. Our long-term project on the study of pyrochlore iridate films also came to fruition this year.
1.

*Imaging

2.

Pulsed laser deposition with rapid beam deflection by a galvanometer mirror scanner: S. Maruyama, N. Sannodo,

the Formation of Ferromagnetic Domains at the LaAlO 3/SrTiO3 Interface: Y. Motoyui, T. Taniuchi,
P. Scheiderer, J. N. Lee, J. Gabel, F. Pfaff, M. Sing, M. Lippmaa, R. Claessen and S. Shin, J. Phys. Soc. Jpn. 88 (2019)034717(1-5).

† Joint research with outside partners.

ISSP Activity Report 2019171

R. Harada, Y. Anada, R. Takahashi, M. Lippmaa and Y. Matsumoto, Rev. Sci. Instrum. 90 (2019) 093901(1-9).
3.

Gradient Carrier Doping as a Method for Maximizing the Photon-to-Current Efficiency of a SrTiO3 Water-Splitting
Photoanode: S. Kawasaki, R. Takahashi and M. Lippmaa, J. Phys. Chem. C 123 (2019) 15551-15556.

4.

Experimental realization of atomically flat and AlO2-terminated LaAlO3(001) substrate surfaces: J. R. Kim, J. N. Lee,J. Mun, Y. Kim, Y. J. Shin, B. Kim, S. Das, L. Wang, M. Kim, M. Lippmaa, T. H. Kim and T. W. Noh, Phys. Rev. Mater.
3 (2019) 023801(1-8).

5.

Synthesis and characterization of (111)-oriented BaTiO3 thin films: T. Bolstad, K. Kjærnes, K. Raa, R. Takahashi,
M. Lippmaa and T. Tybell, Mater. Res. Express 6 (2019) 056409(1-8).

6.

*Strain-induced spontaneous Hall effect in an epitaxial thin film of a Luttinger semimetal: T. Ohtsuki, Z. Tian, A. Endo,

M. Halim, S. Katsumoto, Y. Kohama, K. Kindo, M. Lippmaa and S. Nakatsuji, Proc. Natl. Acad. Sci. USA 116 (2019)8803-8808.

7.

*Growth of Pr Ir O thin films using solid phase epitaxy: T. Ohtsuki, Z. Tian, M. Halim, S. Nakatsuji and M. Lippmaa,
2 2 7

8.

Noble metal clustering and nanopillar formation in an oxide matrix: M. Lippmaa, S. Kawasaki, R. Takahashi andT. Yamamoto, Jpn. J. Appl. Phys. 59 (2020) 010501(1-9).

9.

Tuning the carrier density in SrTiO3/LaTiO3/SrTiO3 quantum wells: J. N. Lee, X. Hou, R. Takahashi and M. Lippmaa,
Appl. Phys. Lett. 116 (2020) 171601(1-5).

J. Appl. Phys. 127 (2020) 035303(1-9).

10. *Extracting the Chiral Contribution to the Negative Longitudinal Magnetoresistance in Epitaxial Pr2Ir2O7 Thin Films:
T. Ohtsuki, Z. Tian, A. Endo, M. Halim, S. Katsumoto, Y. Kohama, K. Kindo, M. Lippmaa and S. Nakatsuji, JPS Conf.
Proc. 30 (2020) 011181(1-6).
11. Sacrificial Water-Soluble BaO Layer for Fabricating Free-Standing Piezoelectric Membranes: R. Takahashi and M.
Lippmaa, ACS Appl. Mater. Interfaces (2020), accepted for publication.

Functional Materials Group
Yoshinobu group
We conducted several research projects in the fiscal year 2019: (1) The surface chemistry of hydrogen and formic acid on Pd-Cu
single atom alloy model catalysts studied by SR-PES, IRAS, and TPD. (2) The adsorption and activation of CO2 on Pt(997)
studied by TPD. (3) The adsorption and activation of CH4 on Pt(997) studied by IRAS, TPD and XPS. (4) LT-STM study offormic acid on Cu(997). (5) In-situ observation of CVD processes of graphene formation on a Cu surface. (6) AP-XPS study oforganometallic complex. (7) XPS study of Pd deposited MoS2.
1.

†Intra-dimer row and inter-dimer row coupling of the vibrational modes of chemisorbed CO on Si(001)-c(4×2) observedby angle-dependent transmission infrared spectroscopy: S. Ohno, S. Shimizu, K. Tanaka, S. Yoshimoto and J. Yoshinobu, J. Chem. Phys. 151 (2019) 074702.
2.

*Hydrogen adsorption and absorption on a Pd-Ag alloy surface studied using in-situ X-ray photoelectron spectroscopy

under ultrahigh vacuum and ambient pressure: J. Tang, S. Yamamoto, T. Koitaya, Y. Yoshikura, K. Mukai, S. Yoshimoto,
I. Matsuda and J. Yoshinobu, Appl. Surf. Sci. 463 (2019) 1161-1167.
3.

†*Reversible low-temperature redox activity and selective oxidation catalysis derived from the concerted activationof multiple metal species on Cr and Rh-incorporated ceria catalysts: S. Ikemoto, X. Huang, S. Muratsugu, S. Nagase,
T. Koitaya, H. Matsui, G.-I. Yokota, T. Sudoh, A. Hashimoto, Y. Tan, S. Yamamoto, J. Tang, I. Matsuda, J. Yoshinobu,
T. Yokoyama, S. Kusaka, R. Matsuda and M. Tada, Phys. Chem. Chem. Phys. 21 (2019) 20868.
4.

*Mass transport in the PdCu phase structures during hydrogen adsorption and absorption studied by XPS underhydrogen atmosphere: J. Tang, S. Yamamoto, T. Koitaya, A. Yoshigoe, T. Tokunaga, K. Mukai, I. Matsuda and J. Yoshinobu, Applied Surface Science 480 (2019) 419-426.

5.

*CO

2 Activation and Reaction on Zn-Deposited Cu Surfaces Studied by Ambient-Pressure X-ray Photoelectron
Spectroscopy: T. Koitaya, S. Yamamoto, Y. Shiozawa, Y. Yoshikura, M. Hasegawa, J. Tang, K. Takeuchi, K. Mukai,
S. Yoshimoto, I. Matsuda and J. Yoshinobu, ACS Catal. 9 (2019) 4539-4550.

6.

*Direct Evidence of Interfacial Hydrogen Bonding in Proton-Electron Concerted 2D Organic Bilayer on Au Substrate:* Joint research among groups within ISSP.

172

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S. Yamamoto, H. S. Kato, A. Ueda, S. Yoshimoto, Y. Hirata, J. Miyawaki, K. Yamamoto, Y. Harada, H. Wadati, H. Mori,J. Yoshinobu and I. Matsuda, e-J. Surf. Sci. Nanotechnol. 17 (2019) 49-55.
7.

The roles of step-site and zinc in surface chemistry of formic acid on clean and Zn-modified Cu(111) and Cu(997)
surfaces studied by HR-XPS, TPD, and IRAS: Y. Shiozawa, T. Koitaya, K. Mukai, S. Yoshimoto and J. Yoshinobu,
J. Chem. Phys. 152 (2020) 044703.

8.

*A computational examination of the electric-field-induced proton transfer along the interface hydrogen bond between

proton donating and accepting self-assembled monolayers: Y. Kanematsu, H. S. Kato, S. Yoshimoto, A. Ueda,
S. Yamamoto, H. Mori, J. Yoshinobu, I. Matsuda and M. Tachikawa, Chem. Phys. Lett. 741 (2020) 137091.
9.

†*Surface Chemistry of Carbon Dioxide on Copper Model Catalysts Studied by Ambient-Pressure X-ray Photoelectron

Spectroscopy: T. Koitaya, S. Yamamoto, I. Matsuda and J. Yoshinobu, e-J. Surf. Sci. Nanotechnol. 17 (2019) 169.

10. 2020 年版薄膜作製応用ハンドブック（權田俊一監修）第 3 編第 2 章第 7 節「薄膜の表面・界面制御と信頼性」(p.883-p.888):
吉信 淳 , (NTS, Tokyo, Japan, 2020).

Akiyama group
In 2019, we made intensive study on development (fab-less production) of gain-sitched 1030-1060nm InGaAs laser diodes(LDs) for short seed-pulse generation below 10 ps (NEDO laser project). We also made haracterizations of material quality,
basic LD performance, and advanced high-speed operations on intermediate and final evices. We studied novel solar cells, suchas heat-recovery solar cells, Perovskite solar cells, and qunatum-dot solar cells for single- and multi-junction solar cells, partly
supported by NEDO solar-cell project. We made bio- and chemi-physics studies on oxyluciferins and caged-luciferins, andcolaborations on quantum-chemistry and molecular-dynamics calculations of these systems.
1.

Light-Driven Electron-Hole Bardeen-Cooper-Schrieffer-Like State in Bulk GaAs: Y. Murotani, C. Kim, H. Akiyama,
L. Pfeiffer, K. West and R. Shimano, Phys. Rev. Lett. 123 (2019) 197401.

2.

Diagnosis of Perovskite Solar Cells Through Absolute Electroluminescence-Efficiency Measurements: J. Xue, X. Hu,
Y. Guo, G. Weng, J. Jiang, S. Chen, Z. Zhu, J. Chu and H. Akiyama, Front. Phys. 7 (2019) 166.

3.

*Photoabsorption Spectra of Aqueous Oxyluciferin Anions Elucidated by Explicit Quantum Solvent: Y. Noguchi,

4.

Quantum-dot single-photon source on a CMOS silicon photonic chip integrated using transfer printing: R. Katsumi,
Y. Ota, A. Osada, T. Yamaguchi, T. Tajiri, M. Kakuda, S. Iwamoto1, H. Akiyama and Y. Arakawa, APL Photonics 4(2019) 036105.

5.

Heat recovery solar cell: K. Kamide, T. Mochizuki, H. Akiyama and H. Takato, Physical Review Applied 12 (2019)
064001.

6.

Multiwavelength GaN‐Based Surface‐Emitting Lasers and Their Design Principles: G. Weng, S. Chen, Y. Mei, Y. Liu,
H. Akiyama, X. Hu, J. Liu, B. Zhang and J. Chu, ANNALEN DER PHYSIK 532 (2019) 1900308.

7.

In situ wavelength tuning of quantum-dot single-photon sources integrated on a CMOS-processed silicon waveguide:
R. Katsumi, Y. Ota, A. Osada, T. Tajiri, T. Yamaguchi, M. Kakuda, S. Iwamoto, H. Akiyama and Y. Arakawa, Appl.
Phys. Lett. 116 (2020) 041103.

8.

Lasing operation in the CsPbBr3 perovskite micron hemisphere cavity grown by chemical vapor deposition:
H. Zhang, C. Zhao, S. Chen, J. Tian, J. Yan, G. Weng, X. Hu, J. Tao, Y. Pan, S. Chen, H. Akiyama and J. Chu, Chemical
Engineering Journal 389 (2020) 124395.

9.

Absolute electroluminescence imaging with distributed circuit modeling: Excellent for solar‐cell defect diagnosis:
J. Hong, Y. Wang, Y. Chen, X. Hu, G. Weng, S. Chen, H. Akiyama, Y. Zhang, B. Zhang and J. Chu, Prog Photovolt Res
Appl 28 (2020) 295.

M. Hiyama, M. Shiga, H. Akiyama and O. Sugino, J. Chem. Theory Comput. 15 (2019) 5474.

10. Modeling and design for low‐cost multijunction solar cell via light‐trapping rear texture technique: Applied in InGaP/
GaAs/InGaAs triple junction: L. Zhu, Y. Hazama, A. Reddy, K. Watanabe, Y. Nakano, M. Sugiyama and H. Akiyama,
Prog Photovolt Res Appl 28 (2020) 251.
11. Practical target values of Shockley–Read–Hall recombination rates in state‐of‐the‐art triple‐junction solar cells forrealizing conversion efficiencies within 1% of the internal radiative limit: T. Nakamura, M. Imaizumi, H. Akiyama andY. Okada, Prog Photovolt Res Appl 28 (2020) 417.
12. Theoretical Study of the Wavelength Selection for the Photocleavage of Coumarin‐caged D‐luciferin: J. Usukura,† Joint research with outside partners.

ISSP Activity Report 2019173

M. Hiyama, M. Kurata, Y. Hazama, X. Qiu, F. M. Winnik, H. Akiyama and N. Koga, Photochem Photobiol (2020)
php.13212, in print.
13. Quantitative immunohistochemistry using an antibody-fused bioluminescent protein: K.-Y. Wang, C. Wu, S. Shimajiri,
H. Kubota, H. Akiyama and Y. Ohmiya, BioTechnique (2020), in print.

Sugino group
In this fiscal year, we have studied hydrogen on Pt(111) and in Si using first-principles simulation method to show the role ofthe nuclear quantum effect and non-adiabatic effect on the dynamics. These studies were done in the hydrogenomics project. We
have also studied the oxygen reduction reaction on transition metals oxides using a high throughput method and predicted the anoble metal impurity and co-dopant can enhance the activity considerably. This result was obtained in collaboration with experimentalists under the NEDO project. We also studied the density functional theory to improve the reliability of the theoreticalprediction of the electronic structures.
1.

Direct coupling of first-principles calculations with replica exchange Monte Carlo sampling of ion disorder in solids:
S. Kasamatsu and O. Sugino, J. Phys.: Condens. Matter 31 (2019) 085901.

2.

Scaling Relation of Oxygen Reduction Reaction Intermediates at Defective TiO 2 Surfaces: Y. Yamamoto, S. Kasamatsu
and O. Sugino, J. Phys. Chem. C 123 (2019) 19486.

3.

*Photoabsorption Spectra of Aqueous Oxyluciferin Anions Elucidated by Explicit Quantum Solvent: Y. Noguchi,

4.

Hydrogen at Electrochemical Interfaces: O. Sugino, J. Phys. Soc. Jpn. 89 (2020) 051013.

5.

*Edge-state correlation accelerates metal-insulator transition in topological semimetal nanofilms: S. Ito, M. Arita,

M. Hiyama, M. Shiga, H. Akiyama and O. Sugino, J. Chem. Theory Comput. 15 (2019) 5474.

J. Haruyama, B. Feng, W. -C. Chen, H. Namatame, M. Taniguchi, C. -M. Cheng, G. Bian, S. -J. Tang, T. -C. Chiang,
O. Sugino, F. Komori and I. Matsuda, Science Advances 6 (2020) eaaz5015 (7 pages).

Oka group
The Oka group have joined ISSP on 2020 January. We have studied the topological properties of Floquet states and proposed aclassification scheme using the Wilson loop method. We have studied the spin-charge intertwined responses in 2D delafossites
in collaboration with experimentalists in St. Andrews and MPI-CPfS.

Inoue group
In 2019, we reported the structural study of heliorhodopsin (HeR). It revealed that the retinal binding mechanism of HeR using
fenestration in the transmembrane region. Also, the bioinformatic analysis and the study on the ultrafast photoisomerization
process of HeR were reported. A new red-shifting mutation of sodium pump rhodopsin without impairing its ion transport
activity was found by structure-based amino acid mutation. A new type of rhodopsin showing unique isomerization process andmicrobial rhodopsin without retinal binding lysine were identified. The atomic structure of Gloeobacter rhodopsin was revealedby x-ray crystallographic analysis.
1.

Ultrafast Dynamics of Heliorhodopsins: S. Tahara, M. Singh, H. Kuramochi, W. Shihoya, K. Inoue, O. Nureki, O. Béjà,
Y. Mizutani, H. Kandori and T. Tahara, J. Phys. Chem. B 123 (2019) 2507-2512.

2.

Crystal Structure of Heliorhodopsin: W. Shihoya, K. Inoue, M. Singh, M. Konno, S. Hososhima, K. Yamashita,
K. Ikeda, A. Higuchi, T. Izume, S. Okazaki, M. Hashimoto, R. Mizutori, S. Tomida, Y. Yamauchi, R. Abe-Yoshizumi,
K. Katayama, S. P. Tsunoda, M. Shibata, Y. Furutani, A. Pushkarev, O. Béjà, T. Uchihashi, H. Kandori and O. Nureki,
Nature 574 (2019) 132-136.

3.

Engineered Functional Recovery of Microbial Rhodopsin without Retinal-Binding Lysine: Y. Yamauchi, M. Konno,
D. Yamada, K. Yura, K. Inoue, O. Béjà and H. Kandori, Photochem. Photobiol. 95 (2019) 1116-1121.

4.

Unique Photochemistry Observed in a New Microbial Rhodopsin: C. Kataoka, K. Inoue, K. Katayama, O. Béjà and
H. Kandori, J. Phys. Chem. Lett. 10 (2019) 5117-5121.

5.

X-ray Crystallographic Structure and Oligomerization of Gloeobacter Rhodopsin: T. Morizumi, W. -L. Ou, N. V. Eps,
K. Inoue, H. Kandori, L. S. Brown and O. P. Ernst, Sci. Rep. 9 (2019) 11283.

6.

Heliorhodopsins are Absent in Diderm (Gram-negative) Bacteria: Some Thoughts and Possible Implications for
Activity: J. Flores-Uribe, G. Hevroni, R. Ghai, A. Pushkarev, K. Inoue, H. Kandori and O. Béjà, Environ. Microbiol.
* Joint research among groups within ISSP.

174

ISSP Activity Report 2019

Rep. 11 (2019) 419-424.
7.

Casting Light on Asgardarchaeota Metabolism in a Sunlit Microoxic Niche: P. -A. Bulzu, A. -S. Andrei, M. M. Salcher,
M. Mehrshad, K. Inoue, H. Kandori, O. Béjà and R. Ghai, Nature Microbiol. 4 (2019) 1129-1137.

8.

Red-shifting Mutation of Light-driven Sodium Pump Rhodopsin: K. Inoue, M. d. C. Marín, S. Tomida, R. Nakamura,
Y. Nakajima, M. Olivucci and H. Kandori, Nature Commun. 10 (2019) 1993.

9.

Optogenetic analysis of respiratory neuronal networks in the ventral medulla of neonatal rats producing channelrhodopsin in Phox2b-positive cells: K. Ikeda, H. Igarashi, H. Yawo, K. Kobayashi, S. Arata, K. Kawakami, M. Izumizaki
and H. Onimaru, Pflugers Arch - Eur J Physiol 471 (2019) 1419.

10. Allosteric Communication to the Retinal Chromophore upon Ion Binding in a Light-driven Sodium Ion Pumping
Rhodopsin: A. Otomo, M. Mizuno, K. Inoue, H. Kandori and Y. Mizutani, Biochemistry 59 (2020) 520-529.
11. Schizorhodopsins: A Novel Family of Rhodopsins from Asgard archaea that Function as Light-Driven Inward H+
Pumps: K. Inoue, S. P. Tsunoda, M. Singh, S. Tomida, S. Hososhima, M. Konno, R. Nakamura, H. Watanabe, P. -A.
Bulzu, H. L. Banciu, A. -S. Andrei, T. Uchihashi, R. Ghai, O. Béjà and H. Kandori, Sci. Adv. 6 (2020) eaaz2441.
12. Infrared spectroscopic analysis on structural changes around the protonated Schiff base upon retinal isomerizationin light-driven sodium pump KR2: S. Tomida, S. Ito, T. Mato, Y. Furutani, K. Inoue and H. Kandori, Biochimica etBiophysica Acta (BBA) - Bioenergetics 1861 (2020) 148190.
13. Physical disuse contributes to widespread chronic mechanical hyperalgesia, tactile allodynia, and cold allodynia throughneurogenic inflammation and spino-parabrachio-amygdaloid pathway activation: Y. Ohmichi, M. Ohmichi, R. Tashima,
K. Osuka, K. Fukushige, D. Kanikowska, Y. Fukazawa, H. Yawo, M. Tsuda, M. Naito and T. Nakano, PAIN (2020) 1, in
print.
14. Gate-keeper of ion transport – a highly conserved helix-3 tryptophan in a channelrhodopsin chimera, C1C2/ChRWR:
Y. Nagasaka, S. Hososhima, N. Kubo, T. Nagata, H. Kandori, K. Inoue and H. Yawo, Biophys. Physicobiol. / BPPB
(2020), accepted for publication.
15. オプトジェネティクス触覚モデルによる異種感覚間可塑性の定量的解析 : 阿部 健太 , 八尾 寛 , 生物物理 59 (2019)317-319.
16. 第３のロドプシン：ヘリオロドプシンの発見 : 井上 圭一 , 神取 秀樹 , B&I バイオサイエンスとインダストリー 77 (2019)42-43.
17. 微生物型ロドプシンのもたらす新たな生物と光の関係とその応用 : 井上 圭一 , 生物工学会誌 97 (2019) 616.
18. ハエトリグモにおける視覚機能とオプシンの吸収波長特性の関係 : 永田 崇 , 寺北 明久 , 比較生理生化学 36 (2019)175-181.
19. 光で細胞を制御する―多様な微生物型ロドプシンとオプトジェネティクス―: 井上 圭一 , 光学 49 (2020) 2-7.
20. ラットを用いたオプトジェネティクス（光遺伝学）: 八尾 寛 , 深澤 有吾 , 冨田 浩史 , 五十嵐 敬幸 , 日本実験動物協会情報
誌 LABIO 21 80 (2020) 5-8.

Quantum Materials Group
Oshikawa group
We studied translation-invariant spin chains with a global SU(N) symmetry. The two symmetries (global SU(N) and the latticetranslation) give rise to the PSU(N) × Z symmetry in the continuum limit, which have a mixed anomaly. By matching the mixed
anomaly with the spin chain model, we identify a topological index for spin model evaluated as the total number of Youngtableaux boxes of spins per unit cell modulo N, which characterizes the "ingappability" of the system. A nontrivial index implies
either a ground-state degeneracy in a gapped phase, which can be regarded as a field-theory version of the Lieb-Schultz-Mattis
theorem. Furthermore, this index gives a restriction of the possible universality classes in a critical phase — the symmetryprotected critical phase, e.g. only a class of SU(N) Wess-Zumino-Witten theories can be realized in the low-energy limit of thegiven lattice model in the presence of the symmetries. Our method also leads to nontrivial constraints also apply when a higher
global symmetry emerges in the model with a lower symmetry. Our prediction agrees with several examples known in previous
studies of SU(N) models.
1.

†Crossover of correlation functions near a quantum impurity in a Tomonaga-Luttinger liquid: C.-Y. Lo, Y. Fukusumi,† Joint research with outside partners.

ISSP Activity Report 2019175

M. Oshikawa, Y.-J. Kao and P. Chen, Phys. Rev. B 99 (2019) 121103.
2.

†Difficulties in operator-based formulation of the bulk quadrupole moment: S. Ono, L. Trifunovic and H. Watanabe,

3.

†Extraction of topological information in Tomonaga-Luttinger liquids: M. Nakamura and S. C. Furuya, Phys. Rev. B 99
(2019) 075128.

4.

†Geometric orbital magnetization in adiabatic processes: L. Trifunovic, S. Ono and H. Watanabe, Phys. Rev. B 100

Phys. Rev. B 100 (2019) 245133.

(2019) 054408.
5.

†Lieb-Schultz-Mattis type theorem with higher-form symmetry and the quantum dimer models: R. Kobayashi,

6.

Polarization amplitude near quantum critical points: S. C. Furuya and M. Nakamura, Phys. Rev. B 99 (2019) 144426.

7.

†Anomaly Matching and Symmetry-Protected Critical Phases in SU(N) Spin Systems in 1+1 Dimensions: Y. Yao, C.-T.

8.

†Anomaly of the Electromagnetic Duality of Maxwell Theory: C.-T. Hsieh, Y. Tachikawa and K. Yonekura, Phys. Rev.

9.

Quantum phase transition and criticality in quasi-one-dimensional spinless Dirac fermions: Y. Tada, Physical Review B
100 (2019) 125145.

K. Shiozaki, Y. Kikuchi and S. Ryu, Phys. Rev. B 99 (2019) 014402.

Hsieh and M. Oshikawa, Phys. Rev. Lett. 123 (2019) 180201.
Lett. 123 (2019) 161601.

10. †Symmetry indicators for topological superconductors: S. Ono, Y. Yanase and H. Watanabe, Phys. Rev. Research 1(2019) 013012.
11. Accessing electromagnetic properties of matter with cylindrical vector beams: H. Fujita, Y. Tada and M. Sato, New
Journal of Physics 21 (2019) 073010.
12. †On gapped boundaries for SPT phases beyond group cohomology: R. Kobayashi, K. Ohmori and Y. Tachikawa, J. HighEnerg. Phys. 2019 (2019) 131.
13. Pin TQFT and Grassmann integral: R. Kobayashi, J. High Energ. Phys. 2019 (2019) 14.
14. †Stable Flatbands, Topology, and Superconductivity of Magic Honeycomb Networks: J. M. Lee, C. Geng, J. W. Park,
M. Oshikawa, S.-S. Lee, H. W. Yeom and G. Y. Cho, Phys. Rev. Lett. 124 (2020) 137002.
15. †Refined symmetry indicators for topological superconductors in all space groups: S. Ono, H. C. Po and H. Watanabe,Sci. Adv. 6 (2020) eaaz8367 (1-14).
16. †Filling-enforced constraint on the quantized Hall conductivity on a periodic lattice: Y.-M. Lu, Y. Ran and M. Oshikawa,
Annals of Physics 413 (2020) 168060.
17. †Proof of the Absence of Long-Range Temporal Orders in Gibbs States: H. Watanabe, M. Oshikawa and T. Koma, J Stat
Phys 178 (2020) 926.
18. Non-local order parameters and quantum entanglement for fermionic topological field theories: K. Inamura,
R. Kobayashi and S. Ryu, Journal of High Energy Physics 01 (2020) 121(1-30).
19. Cyclotron resonance in Kondo insulator: Y. Tada, Physical Review Research 2 (2020) 023194.
20. A generalized boundary condition applied to Lieb-Schultz-Mattis type ingappabilities and many-body Chern numbers:
Y. Yao and M. Oshikawa, Phys. Rev. X (2020), accepted for publication.
21. カイラル超流動体の軌道角運動量は何によって決まるか？ : 多田 靖啓 , 日本物理学会誌 第 74 巻、第 2 号 (2019) 93.

Nakatsuji group
Our group focuses on designing new materials with fascinating emergent quantum phenomena, exploring the physics of suchstates under extreme conditions, and developing their spintronic and thermoelectric functionalities. Our primary research
activities in 2019 are summarized as follow: (1) We discovered the dramatically enhanced transverse thermoelectric effectin iron-based binary ferromagnets Fe3X (X = Ga, Al), owing to novel topological features in their electronic band structure.
We succeeded in fabricating thin films of these materials, which yield exceptional potential for a new generation of low-cost,
flexible thermoelectric generators. (2) We achieved electrical switching of a topological antiferromagnetic state and its detection via the room-temperature anomalous Hall effect (AHE) using bilayer devices of Mn3Sn and nonmagnetic metals. This
* Joint research among groups within ISSP.

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work opens up a new exciting pathway of integrating topological antiferromagnetic states in spintronic technologies. (3) Our
low-temperature transport measurements on the multipolar Kondo material PrV2Al20 reveal a substantial AMR effect, signifying
a Fermi surface reconstruction on entering the high-field quadrupolar ordered phase. Moreover, we observed a universal scaling
behavior expected for the quadrupolar Kondo lattice in resistivity and magnetic susceptibility, which establishes the quadrupolar
Kondo effect being the driving mechanism behind the non-Fermi-liquid phase of PrV2Al20. (4) We explored the full temperature-magnetic field phase diagram of the quantum spin ice candidates Pr2Zr2O7 using a comprehensive set of magnetic andelastic probes, which unveil the crucial role of magnetoelastic coupling in generating the quantum dynamics in the system.
1.

Crystal Structure in Quadrupolar Kondo Candidate PrTr2Al20(Tr = Ti and V): D. Okuyama, M. Tsujimoto,
H. Sagayama, Y. Shimura, A. Sakai, A. Magata, S. Nakatsuji and T. J. Sato, J. Phys. Soc. Jpn. 88 (2019) 015001.

2.

*Field-Induced Switching of Ferro-Quadrupole Order Parameter in PrTi Al : T. Taniguchi, K. Hattori, M. Yoshida,
2 20

H. Takeda, S. Nakamura, T. Sakakibara, M. Tsujimoto, A. Sakai, Y. Matsumoto, S. Nakatsuji and M. Takigawa, J. Phys.
Soc. Jpn. 88 (2019) 084707(1-20).
3.

*Evaluation of spin diffusion length and spin Hall angle of the antiferromagnetic Weyl semimetal Mn Sn: P. K. Muduli,
3

4.

Homogeneous reduced moment in a gapful scalar chiral kagome antiferromagnet: A. Scheie, S. Dasgupta, M. Sanders,A. Sakai, Y. Matsumoto, T. R. Prisk, S. Nakatsuji, R. J. Cava and C. Broholm, Phys. Rev. B 100 (2019) 024414.

5.

Effect of Anisotropic Hybridization in YbAlB4 Probed by Linear Dichroism in Core-Level Hard X-Ray Photoemission
Spectroscopy: K. Kuga, Y. Kanai, H. Fujiwara, K. Yamagami, S. Hamamoto, Y. Aoyama, A. Sekiyama, A. Higashiya,
T. Kadono, S. Imada, A. Yamasaki, A. Tanaka, K. Tamasaku, M. Yabashi, T. Ishikawa, S. Nakatsuji and T. Kiss, Phys.
Rev. Lett. 123 (2019) 036404.

6.

*Giant Anisotropic Magnetoresistance due to Purely Orbital Rearrangement in the Quadrupolar Heavy Fermion

T. Higo, T. Nishikawa, D. Qu, H. Isshiki, K. Kondou, D. Nishio-Hamane, S. Nakatsuji and Y. Otani, Phys. Rev. B 99
(2019) 184425.

Superconductor PrV2Al20: Y. Shimura, Q. Zhang, B. Zeng, D. Rhodes, R. Schönemann, M. Tsujimoto, Y. Matsumoto,
A. Sakai, T. Sakakibara, K. Araki, W. Zheng, Q. Zhou, L. Balicas and S. Nakatsuji, Phys. Rev. Lett. 122 (2019)
256601(1-6).
7.

反強磁性体において実現した室温での巨大異常ネルンスト効果 - 磁気ワイルフェルミオンが織りなすトポロジカル現象 : 冨田
崇弘 , 肥後 友也 , 中辻 知 , 固体物理 54 (2019) 85-99.

8.

Terahertz conductivity of the magnetic Weyl semimetal Mn 3 Sn films: B. Cheng, Y. Wang, D. Barbalas, T. Higo,
S. Nakatsuji and N. P. Armitage, Appl. Phys. Lett. 115 (2019) 012405.

9.

*Magnetic and magnetic inverse spin Hall effects in a non-collinear antiferromagnet: M. Kimata, H. Chen, K. Kondou,

S. Sugimoto, P. K. Muduli, M. Ikhlas, Y. Omori, T. Tomita, A. H. MacDonald, S. Nakatsuji and Y. Otani, Nature 565(2019) 627.

10. *Scanning tunneling microscopy on cleaved Mn3Sn(0001) surface: H.-H. Yang, C.-C. Lee, Y. Yoshida, M. Ikhlas,
T. Tomita, A. Nugroho, T. Ozaki, S. Nakatsuji and Y. Hasegawa, Sci. Rep. 9 (2019) 9677 (1-7).
11. Linear polarization-dependent core-level photoemission spectroscopy in Yb-based valence fluctuating system: K. Kuga,
Y. Kanai, H. Fujiwara, K. Yamagami, S. Hamamoto, Y. Aoyama, A. Sekiyama, A. Higashiya, T. Kadono, S. Imada,
A. Yamasaki, K. Tamasaku, M. Yabashi, T. Ishikawa, S. Nakatsuji and T. Kiss, Journal of Electron Spectroscopy and
Related Phenomena / (2019) /.
12. Unveiling hidden multipolar orders with magnetostriction: A. S. Patri, A. Sakai, S. Lee, A. Paramekanti, S. Nakatsuji
and Y. B. Kim, Nat Commun 10 (2019) 4092.
13. Energy harvesting materials based on the anomalous Nernst effect: M. Mizuguchi and S. Nakatsuji, Sci. Technol. Adv.
Mater. 20 (2019) 262-275.
14. *Strain-induced spontaneous Hall effect in an epitaxial thin film of a Luttinger semimetal: T. Ohtsuki, Z. Tian, A. Endo,
M. Halim, S. Katsumoto, Y. Kohama, K. Kindo, M. Lippmaa and S. Nakatsuji, Proc. Natl. Acad. Sci. USA 116 (2019)8803-8808.
15. 量子効果で 10 倍以上の磁気熱電効果を室温で実現 : 酒井 明人 , 中辻 知 , クリーンエネルギー 28 (2019) 34-38.
16. ワイル反強磁性体 Mn3Sn における巨大な磁気光学カー効果と拡張磁気八極子ドメインの直接観測 : 肥後 友也 , J-Physics#7 (2019) 94.
17. ワイル磁性体 Co2MnGa における室温巨大異常ネルンスト効果 : 酒井 明人 , J-Physics 07 (2019) 47-49.

† Joint research with outside partners.

ISSP Activity Report 2019177

18. *Field-Orientation Effect on Ferro-Quadrupole Order in PrTi2Al20: S. Kittaka, T. Taniguchi, K. Hattori, S. Nakamura,T. Sakakibara, M. Takigawa, M. Tsujimoto, A. Sakai, Y. Matsumoto and S. Nakatsuji, J. Phys. Soc. Jpn. 89 (2020)043701(1-4).
19. Unveiling Quadrupolar Kondo Effect in the Heavy Fermion Superconductor PrV 2 Al 20: M. Fu, A. Sakai, N. Sogabe,
M. Tsujimoto, Y. Matsumoto and S. Nakatsuji, J. Phys. Soc. Jpn. 89 (2020) 013704.
20. *Growth of Pr2Ir2O7 thin films using solid phase epitaxy: T. Ohtsuki, Z. Tian, M. Halim, S. Nakatsuji and M. Lippmaa,
J. Appl. Phys. 127 (2020) 035303 (1-9).
21. Anomalous transverse response of Co2MnGa and university of the room-temperature α_ij^A/σ_ij^A ratio acrosstopological magnets: L. Xu, X. Li, L. Ding, T. Chen, A. Sakai, B. Fauqué, S. Nakatsuji, Z. Zhu and K. Behnia, Phys.
Rev. B 101 (2020) 180404.
22. *Effect of sample size on anomalous Nernst effect in chiral antiferromagnetic Mn3Sn devices: H. Narita, T. Higo,
M. Ikhlas, S. Nakatsuji and Y. Otani, Appl. Phys. Lett. 116 (2020) 072404.
23. *Magneto-optical Kerr effect in a non-collinear antiferromagnet Mn 3 Ge: M. Wu, H. Isshiki, T. Chen, T. Higo, S. Nakatsuji and Y. Otani, Appl. Phys. Lett. 116 (2020) 132408.
24. *Electrical manipulation of a topological antiferromagnetic state: H. Tsai, T. Higo, K. Kondou, T. Nomoto, A. Sakai,
A. Kobayashi, T. Nakano, K. Yakushiji, R. Arita, S. Miwa, Y. Otani and S. Nakatsuji, Nature 580 (2020) 608-613.
25. *Iron-based binary ferromagnets for transverse thermoelectric conversion: A. Sakai, S. Minami, T. Koretsune, T. Chen,
T. Higo, Y. Wang, T. Nomoto, M. Hirayama, S. Miwa, D. Nishio-Hamane, F. Ishii, R. Arita and S. Nakatsuji, Nature 581(2020) 53-57.
26. 硬 X 線光電子分光と基礎物性測定により明らかにした価数の量子臨界現象 : 久我 健太郎 , 松本 洋介 , 大川 万里生 , 中
辻 知 , 放射光 33 (2020) 1-8.
27. *Structural and magnetic properties of Mn3Ge films with Pt and Ru seed layers: A. Kobayashi, T. Higo, S. Nakatsuji and
Y. Otani, AIP Advances 10 (2020) 015225(1-6).
28. *Extracting the Chiral Contribution to the Negative Longitudinal Magnetoresistance in Epitaxial Pr2Ir2O7 Thin Films:
T. Ohtsuki, Z. Tian, A. Endo, M. Halim, S. Katsumoto, Y. Kohama, K. Kindo, M. Lippmaa and S. Nakatsuji, JPS Conf.
Proc. 30 (2020) 011181(1-6).
29. *Magnetization and Thermal Expansion Properties of Quantum Spin Ice Candidate Pr2Zr2O7: N. Tang, A. Sakai, K.
Kimura, S. Nakamura, M. Fu, Y. Matsumoto, T. Sakakibara and S. Nakatsuji, JPS Conf. Proc. 30 (2020) 011090(1-6).
30. Large Nernst Effect and Thermodynamics Properties in Weyl Antiferromagnet: T. Tomita, M. Ikhlas and S. Nakatsuji,
JPS Conf. Proc 30 (2020) 011009/1-7.
31. *Room-temperature terahertz anomalous Hall effect in Weyl antiferromagnet Mn3Sn thin films: T. Matsuda, N. Kanda,
T. Higo, N. P. Armitage, S. Nakatsuji and R. Matsunaga, Nat Commun 11 (2020) 909.
32. Sample Quality Dependence of the Magnetic Properties in Non-Collinear Antiferromagnet Mn 3 Sn: M. Ikhlas,
T. Tomita and S. Nakatsuji, JPS. Conf. Proc 30 (2020) 011177.
33. Crystal structure and magnetic properties of the ferromagnet CoMnSb: H. Nakamura, M. Y. P. Akbar, T. Tomita, A. A.
Nugroho and S. Nakatsuji, JPS Conference Proceedings 29 (2020) 013004(1-5).

Miwa group
We have studied following topics in this year: (1) Spectroscopy research for voltage-controlled magnetic anisotropy effect, (2)Giant spin-torque utilizing heat at the nanoscale, and (3) Physical reservoir computing. In the topic (1), we have performed
x-ray magnetic circular dichroism spectroscopy to reveal giant perpendicular magnetic anisotropy and voltage effect on FeIr/
MgO system (Phys. Rev. B 99, 184421). We published two review papers about comprehensive studies of voltage-controlled
magnetic anisotropy effect (J. Phys. D: Appl. Phys. 52, 063001 etc). In the topic (2), we find that it is feasible to obtain giant
spin-torque using heat-induced magnetic anisotropy change (Nat. Nanotechnol. 14, 40). In the topic (3), we performed physicalreservoir computing using spin-torque oscillator (Appl. Phys. Lett. 114, 164401 etc.).
1.

Microscopic origin of large perpendicular magnetic anisotropy in an FeIr/MgO system: S. Miwa, T. Nozaki, M. Tsujikawa, M. Suzuki, T. Tsukahara, T. Kawabe, Y. Kotani, K. Toyoki, M. Goto, T. Nakamura, M. Shirai, S. Yuasa andY. Suzuki, Phys. Rev. B 99 (2019) 184421(1-7).

2.

Quantitative and systematic analysis of bias dependence of spin accumulation voltage in a nondegenerate Si-based spin
* Joint research among groups within ISSP.

178

ISSP Activity Report 2019valve: S. Lee, F. Rortais, R. Ohshima, Y. Ando, S. Miwa, Y. Suzuki, H. Koike and M. Shiraishi, Phys. Rev. B 99 (2019)064408(1-6).
3.

Reservoir computing with dipole-coupled nanomagnets: H. Nomura, T. Furuta, K. Tsujimoto, Y. Kuwabiraki, F. Peper,
E. Tamura, S. Miwa, M. Goto, R. Nakatani and Y. Suzuki, Jpn. J. Appl. Phys. 58 (2019) 070901(1-5).

4.

Voltage-controlled magnetic anisotropy and Dzyaloshinskii−Moriya interactions in CoNi/MgO and CoNi/Pd/MgO:
J. Suwardy, M. Goto, Y. Suzuki and S. Miwa, Jpn. J. Appl. Phys. 58 (2019) 060917(1-4).

5.

Interface resonance in Fe/Pt/MgO multilayer structure with large voltage controlled magnetic anisotropy change:
Y. Jibiki, M. Goto, M. Tsujikawa, P. Risius, S. Hasebe, X. Xu, K. Nawaoka, T. Ohkubo, K. Hono, M. Shirai, S. Miwa
and Y. Suzuki, Appl. Phys. Lett. 114 (2019) 082405(1-5).

6.

Physical reservoir computing based on spin torque oscillator with forced synchronization: S. Tsunegi, T. Taniguchi,
K. Nakajima, S. Miwa, K. Yakushiji, A. Fukushima, S. Yuasa and H. Kubota, Appl. Phys. Lett. 114 (2019) 164101(1-5).

7.

Magnetic anisotropy of ferromagnetic metals in low-symmetry systems: Y. Suzuki and S. Miwa, Physics Letters A 383(2019) 1203-1206.

8.

*Realization of Spin-dependent Functionality by Covering a Metal Surface with a Single Layer of Molecules: H. Isshiki,

K. Kondou, S. Takizawa, K. Shimose, T. Kawabe, E. Minamitani, N. Yamaguchi, F. Ishii, A. Shiotari, Y. Sugimoto,
S. Miwa and Y. Otani, Nano Lett. 19 (2019) 7119-7123.
9.

Stability of spin XOR gate operation in silicon based lateral spin device with large variations in spin transport parameters: R. Ishihara, S. Lee, Y. Ando, R. Ohshima, M. Goto, S. Miwa, Y. Suzuki, H. Koike and M. Shiraishi, AIP Advances
9 (2019) 125326(1-6).

10. Microwave amplification in a magnetic tunnel junction induced by heat-to-spin conversion at the nanoscale: M. Goto,
Y. Wakatake, U. K. Oji, S. Miwa, N. Strelkov, B. Dieny, H. Kubota, K. Yakushiji, A. Fukushima, S. Yuasa and Y. Suzuki,
Nature Nanotech 14 (2019) 40-43.
11. Investigation of gating effect in Si spin MOSFET: S. Lee, F. Rortais, R. Ohshima, Y. Ando, M. Goto, S. Miwa,
Y. Suzuki, H. Koike and M. Shiraishi, Appl. Phys. Lett. 116 (2020) 022403(1-5).
12. *Electrical manipulation of a topological antiferromagnetic state: H. Tsai, T. Higo, K. Kondou, T. Nomoto, A. Sakai,
A. Kobayashi, T. Nakano, K. Yakushiji, R. Arita, S. Miwa, Y. Otani and S. Nakatsuji, Nature 580 (2020) 608-613.
13. *Iron-based binary ferromagnets for transverse thermoelectric conversion: A. Sakai, S. Minami, T. Koretsune, T. Chen,
T. Higo, Y. Wang, T. Nomoto, M. Hirayama, S. Miwa, D. Nishio-Hamane, F. Ishii, R. Arita and S. Nakatsuji, Nature 581(2020) 53-57.
14. Detection of Spin Transfer from Metal to Molecule by Magnetoresistance Measurement: H. Gamou, K. Shimose,
R. Enoki, E. Minamitani, A. Shiotari, Y. Kotani, K. Toyoki, T. Nakamura, Y. Sugimoto, M. Kohda, J. Nitta and S. Miwa,
Nano Lett. 20 (2020) 75-80.
15. Gate-Tunable Spin XOR Operation in a Silicon-Based Device at Room Temperature: R. Ishihara, Y. Ando, S. Lee,
R. Ohshima, M. Goto, S. Miwa, Y. Suzuki, H. Koike and M. Shiraishi, Phys. Rev. Applied 13 (2020) 044010(1-9).
16. 電界効果で界面の磁性を制御する : 三輪 真嗣 , 鈴木 基寛 , 辻川 雅人 , 野崎 隆行 , 日本物理学会誌 74 (2019) 714-719.
17. Perpendicular magnetic anisotropy and its electric-field-induced change at metal-dielectric interfaces: S. Miwa,
M. Suzuki, M. Tsujikawa, T. Nozaki, T. Nakamura, M. Shirai, S. Yuasa and Y. Suzuki, J. Phys. D: Appl. Phys. 52 (2019)063001(1-22).
18. X 線磁気円二色性分光を用いた金属磁性体の電界効果素子研究 : 三輪 真嗣 , 鈴木 基寛 , 辻川 雅人 , 野崎 隆行 , まぐね
14 (2019) 146-152.
19. スピントルク発振器を用いた物理リザバー計算 : 常木 澄人 , 谷口 知大 , 三輪 真嗣 , 中嶋 浩平 , 久保田 均 , まぐね 14(2019) 335-340.
20. Recent Progress in the Voltage-Controlled Magnetic Anisotropy Effect and the Challenges Faced in Developing VoltageTorque MRAM: T. Nozaki, T. Yamamoto, S. Miwa, M. Tsujikawa, M. Shirai, S. Yuasa and Y. Suzuki, Micromachines 10(2019) 327(1-31).
21. ナノ磁性体中の熱を利用したマイクロ波技術 : 後藤 穣 , 若竹 陽介 , U. K. Oji, 三輪 真嗣 , 鈴木 義茂 , 久保田 均 , 薬師寺 啓 , 福島 章雄 , 湯浅 新治 , N. Strelkov and B. Dieny, 自動車技術 73 (2019) 96-97.
22. 量子スピントロニクス現象を示す新物質について : 三輪 真嗣 , 電気学会誌 139 (2019) 601-606.
† Joint research with outside partners.

ISSP Activity Report 2019179

23. 電圧トルク MRAM に向けた新材料探索と磁化反転制御技術開発 : 野崎 隆行 , 山本 竜也 , 三輪 真嗣 , 鈴木 義茂 , 湯浅
新治 , まぐね 15 (2020) 15-23.

Division of Data-Integrated Materials Science
Fukushima group
Recently, the constructions of materials databases using first-principles calculations have been actively carried out. Combining
such materials databases and data-mining technique, one can not only analyze the mechanisms of physical phenomena, but also
design new functional materials. Actually, there are several large materials databases, such as Materials Project, Open Quantum
Materials Database (OQMD), and Novel Materials Discovery (NOMAD), which researchers can freely access. However, these
inorganic materials databases are only for compounds with stoichiometric compositions and do not contain information about
configurational disordered systems. In this year, in order to construct the materials databases for configurational disorderedsystems, we have developed an automatic high-throughput calculation method on the basis of the Korringa-Kohn-Rostoker(KKR) Green's function method. There are several merits in the KKR Green's function method, compared to other first-principles approaches. The most important advantage is the ability to perform the calculations of alloys and impurity doped systems,
combining with the coherent potential approximation (CPA). Additionally, since the Green's function is directory calculated inthis method, physical quantities, e.g., magnetic exchange interactions and transport properties, can be efficiently calculated by
the linear response theory. Automatic high-throughput calculations by first-principles approaches are not easy tasks, because
we need to appropriately control many numerical parameters and self-consistent procedures. For example, in the KKR Green's
function method, the energy integration of the Green's function is performed in the complex energy plane to obtain the electron
density. This complex energy contour must cover the valence bands and depends on systems. Our python interface for the highthroughput calculations enable to determine the numerical parameters and to manage the self-consistent procedures completely
automatically. For the electronic structure calculations, the AkaiKKR program package is employed. The automatic highthroughput calculations have been demonstrated for quaternary high entropy alloys with BCC and FCC solid solution phases,
where 4 principal elements have the same atomic concentration and are randomly distributed in the crystals. The number of thetarget elements are 38 as follows: Al, Si, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge, Y, Zr, Nb, Mo, Tc, Ru, Rh, Pd, Ag, Cd,
In, Sn, Hf, Ta, W, Re, Os, Ir, Pt, Au, Hg, Tl, Pb and Bi. We randomly choose the 4 elements from the above target elements andconstruct a quaternary high entropy alloy. Since both the BCC and FCC cases are considered, the total number of the systems
is 147,630. All calculations are done by the ISSP supercomputer, system B. We succeeded in automatically converging 99.97%
of the systems, i.e., 147598/147630. The constructed database is quite useful for the design of new functional materials. For
example, in the cases of high-performance soft magnets, the high magnet moments and Curie temperatures are needed. Using
the database, we can screen the candidate systems immediately. Here, it is concluded that FeCoXY, FeCoNiY, and MnFeCoY
systems are good candidates for the high-performance soft magnets.
1.

Experimental verification of the origin of positive linear magnetoresistance in CoFe(V1−xMnx)Si Heusler alloys:
S. Yamada, S. Kobayashi, A. Masago, L. S. R. Kumara, H. Tajiri, T. Fukushima, S. Abo, Y. Sakuraba, K. Hono, T.
Oguchi and K. Hamaya, Phys. Rev. B 100 (2019) 195137(1-6).

2.

Theoretical prediction of maximum Curie temperatures of Fe-based dilute magnetic semiconductors by first-principles
calculations: T. Fukushima, H. Shinya, A. Masago, K. Sato and H. Katayama-Yoshida, Appl. Phys. Express 12 (2019)063006(1-5).

3.

Valence states and the magnetism of Eu ions in Eu-doped GaN: T. Nunokawa, Y. Fujiwara, Y. Miyata, N. Fujimura,T. Sakurai, H. Ohta, A. Masago, H. Shinya, T. Fukushima, K. Sato and H. Katayama-Yoshida, J. Appl. Phys 127 (2020)
083901(1-7).

4.

High Curie temperature in Eu-doped GaN caused by volume-compensated Ga-vacancy: A. Masago, H. Shinya,
T. Fukushima, K. Sato and H. Katayama-Yoshida, AIP Adv. 10 (2020) 025216(1-4).

5.

Spin injection through energy-band symmetry matching with high spin polarization in atomically controlled ferromagnet/ferromagnet/ semiconductor structures: M. Yamada, F. Kuroda, M. Tsukahara, S. Yamada, T. Fukushima,
K. Sawano, T. Oguchi1 and K. Hamaya, NPG Asia Mater. (2020), accepted for publication.

6.

First-principles study of magnetism and phase stabilities of V2 based antiferromagnetic Heusler alloys: F. Kuroda,
T. Fukushima and T. Oguch, J. Appl. Phys (2020), accepted for publication.

* Joint research among groups within ISSP.

180

ISSP Activity Report 2019

Materials Design and Characterization Laboratory
Hiroi group
The superconducting pyrochlore oxide Cd2Re2O7 has been investigated as a candidate spin–orbit-coupled metal (SOCM), in
which specific Fermi liquid instability is expected to lead to an odd-parity order with spontaneous inversion-symmetry breaking
and parity-mixing superconductivity. A domain control at low temperature has been carried out by means of biaxial and uniaxialpressures to study the intrinsic anisotropy in the transport properties. A novel Li-in conduction mechanism was proposed for thesuper-ionic conductor LGPS.

1.

One-dimensionalization by Geometrical Frustration in the Anisotropic Triangular Lattice of the 5d Quantum Antiferromagnet Ca3ReO5Cl2: D. Hirai, K. Nawa, M. Kawamura, T. Misawa and Z. Hiroi, J. Phys. Soc. Jpn. 88 (2019) 044708.

2.

Crystal structure and magnetic properties of the 5dtransition metal oxides AOsO4 (A = K, Rb, Cs): J.-I. Yamaura and
Z. Hiroi, Phys. Rev. B 99 (2019) 155113.

3.

*Evaluation of spin diffusion length and spin Hall angle of the antiferromagnetic Weyl semimetal Mn Sn: P. K. Muduli,
3

T. Higo, T. Nishikawa, D. Qu, H. Isshiki, K. Kondou, D. Nishio-Hamane, S. Nakatsuji and Y. Otani, Phys. Rev. B 99
(2019) 184425.

4.

†*Magnetoelastic couplings in the deformed kagome quantum spin lattice of volborthite: A. Ikeda, S. Furukawa,

5.

†*Contrasting Pressure-Induced Metallization Processes in Layered Perovskites, α-Sr MO (M=V,Cr): T. Yamauchi,
2
4

6.

* カゴメ銅鉱物ボルボサイトにおける軌道転移とフラストレート磁性 : 広井 善二 , 石川 孟 , 小濱 芳允 , 固体物理 54 (2019)

O. Janson, Y. H. Matsuda, S. Takeyama, T. Yajima, Z. Hiroi and H. Ishikawa, Phys. Rev. B 99 (2019) 140412(R)(1-5).
T. Shimazu, D. Nishio-Hamane and H. Sakurai, Phys. Rev. Lett. 123 (2019) 156601.
117-130.

7.

†*Topochemical synthesis of phase-pure Mo AlB through staging mechanism: K. Kim, C. Chen, D. Nishio-Hamane,2
2

8.

Weak Anisotropic Lithium-Ion Conductivity in Single Crystals of Li10GeP2S12: R. Iwasaki, S. Hori, R. Kanno,
T. Yajima, D. Hirai, Y. Kato and Z. Hiroi, Chem. Mater. 31 (2019) 3694.

9.

*Minakawaite and platinum–group minerals in the placer from the clinopyroxenite area in serpentinite mélange ofM. Okubo and A. Yamada, Chem. Commun. 55 (2019) 9295.

Kurosegawa belt, Kumamoto Prefecture, Japan: D. Nisio–Hamane, T. Tanaka and T. Shinmachi, Journal of Mineralogical and Petrological Sciences 114 (2019) 252.
10. †*Magnetic Properties of SmFe3-Type Sm–Zr–Fe–Co–Ti Melt-Spun Ribbons: T. Saito, T. Horita and D. Nishio-Hamane,
Mater. Trans. 60 (2019) 1384.
11. *Engelhauptite: A variant of S=1/2 kagome antiferromagnet: H. Ishikawa, D. Nishio-Hamane, A. Miyake, M. Tokunaga,
A. Matsuo, K. Kindo and Z. Hiroi, Phys. Rev. Materials 3 (2019) 064414(1-5).
12. †*Magnetic properties of SmFe12-based magnets produced by spark plasma sintering method: T. Saito, F. Watanabe andD. Nishio-Hamane, Journal of Alloys and Compounds 773 (2019) 1018.
13. *The effects of high pressure and superheating on the planar growth of Al3Ni phase in hypo-peritectic Al-30wt%Ni
alloy: X. H. Wang, H. W. Wang, C. M. Zou, Z. J. Wei, Y. Uwatoko, J. Gouchi, D. Nishio-Hamane and H. Gotou, Journalof Alloys and Compounds 772 (2019) 1052-1060.
14. †*Contrasted Sn substitution effects on Dirac line node semimetals SrIrO3 and CaIrO: M. Negishi, N. Hiraoka,
D. Nishio-Hamane and H. Takagi, APL Materials 7 (2019) 121101.
15. *A series of magnon crystals appearing under ultrahigh magnetic fields in a kagomé antiferromagnet: R. Okuma,
D. Nakamura, T. Okubo, A. Miyake, A. Matsuo, K. Kindo, M. Tokunaga, N. Kawashima, S. Takeyama and Z. Hiroi,
Nature Communications 10 (2019) 1229(7).
16. *Possible observation of quantum spin-nematic phase in a frustrated magnet: Y. Kohama, H. Ishikawa, A. Matsuo,
K. Kindo, N. Shannon and Z. Hiroi, Proc. Nat. Acad. Sci. U.S.A. 116 (2019) 10686-10690.
17. †*Phase stability and thermoelectric properties of semiconductor-like tetragonal FeAl2: K. Tobita, K. Kitahara,
Y. Katsura, N. Sato, D. Nishio-Hamane, H. Gotou and K. Kimura, Science and Technology of Advanced Materials 20(2019) 937.
18. †*Synthesis of Sm(Co,Fe)4B compounds by rapid quenching and subsequent heat treatment: T. Saito and D. Nishio† Joint research with outside partners.

ISSP Activity Report 2019181

Hamane, Intermetallics 107 (2019) 6.
19. †*Synthesis and crystal chemistry of mukhinite, V-analogue of clinozoisite on the join Ca2Al3Si3O12(OH)–
Ca2Al2VSi3O12(OH): M. Nagashima, D. Nishio-Hamane, N. Nakano and T. Kawasaki, Phys Chem Minerals 46 (2019)63.
20. Variation in Superconducting Symmetry Against Pressure on Noncentrosymmetric Superconductor Cd2Re2O7
Revealed by 185/187Re Nuclear Quadrupole Resonance: S. Kitagawa, K. Ishida, T. C. Kobayashi, Y. Matsubayashi,
D. Hirai and Z. Hiroi, J. Phys. Soc. Jpn. 89 (2020) 053701.
21. Titanium Hydride Complex BaCa2Ti2H14 with 9-Fold Coordination: T. Yajima, H. Nakajima, T. Honda, K. Ikeda,
T. Otomo, H. Takeda and Z. Hiroi, Inorg. Chem. 59 (2020) 4228.

Kawashima group
We developed highly efficient methods, algorithms, and parallelized programs based on the tensor network (TN) method andapplied them to relevant physical problems, which include the following: (1) development of decomposition method of a highranked tensor into a ring of smaller low-ranked tensors, (2) development of TN method for boundary phenomena, (3) application of TN method to dynamical phase transition, (4) study of Kitaev spin liquid by TN variational functions, (5) study ofquantum spin liquid realized in α-RuCl3 in a magnetic field, (6) reduction of computational cost of HOTRG in high spatial
dimensions, and (7) exact-diagonalization study of dynamics of spin-phonon coupled systems.
1.

*Thermal-transport studies of kagomé antiferromagnets: M. Y. M. Akazawa, M. Shimozawa, T. Shibauchi, Y. Matsuda,

H. Ishikawa, T. Yajima, Z. Hiroi, M. Oda, H. Yoshida, H.-Y. Lee, J. H. Han and N. Kawashima, J. Phys.: Condens.
Matter 32 (2019) 074001(11pp).
2.

Detecting Signals of Weakly First-order Phase Transitions in Two-dimensional Potts Models: S. Iino, S. Morita,
N. Kawashima and A. W. Sandvik, J. Phys. Soc. Jpn. 88 (2019) 034006.

3.

Fast Algorithm for Generating Random Bit Strings and Multispin Coding for Directed Percolation: H. Watanabe,
S. Morita, S. Todo and N. Kawashima, J. Phys. Soc. Jpn. 88 (2019) 024004(8pages).

4.

*Finite-Size Effects on Kármán Vortex in Molecular Dynamics Simulation: Y. Asano, H. Watanabe and H. Noguchi,

5.

Boundary tensor renormalization group: S. Iino, S. Morita and N. Kawashima, Phys. Rev. B 100 (2019) 035449.

6.

Entropy Governed by the Absorbing State of Directed Percolation: K. Harada and N. Kawashima, Phys. Rev. Lett. 123(2019) 090601.

7.

Gapless Kitaev Spin Liquid to Classical String Gas through Tensor Networks: H.-Y. Lee, R. Kaneko, T. Okubo and
N. Kawashima, Phys. Rev. Lett. 123 (2019) 087203.

8.

Calculation of higher-order moments by higher-order tensor renormalization group: S. Morita and N. Kawashima,
Computer Physics Communications 236 (2019) 65-71.

9.

*mVMC—Open-source software for many-variable variational Monte Carlo method: T. Misawa, S. Morita, K. Yoshimi,

J. Phys. Soc. Jpn. 88 (2019) 075003.

M. Kawamura, Y. Motoyama, K. Ido, T. Ohgoe, M. Imada and T. Kato, Computer Physics Communications 235 (2019)447.

10. *SIMD vectorization for the Lennard-Jones potential with AVX2 and AVX-512 instructions: H. Watanabe and K. M.
Nakagawa, Computer Physics Communications 237 (2019) 1-7.
11. *A series of magnon crystals appearing under ultrahigh magnetic fields in a kagomé antiferromagnet: R. Okuma,
D. Nakamura, T. Okubo, A. Miyake, A. Matsuo, K. Kindo, M. Tokunaga, N. Kawashima, S. Takeyama and Z. Hiroi,
Nature Communications 10 (2019) 1229(7).
12. Abelian and non-Abelian chiral spin liquids in a compact tensor network: H.-Y. Lee, R. Kaneko, T. Okubo and
N. Kawashima, Phys. Rev. B 101 (2020) 035140.
13. Boundary conformal spectrum and surface critical behavior of classical spin systems:A tensor network renormalization
study: S. Iino, S. Morita and N. Kawashima, Phys. Rev. B 101 (2020) 155418.
14. Magnetic field induced quantum phases in a tensor network study of Kitaev magnets: H.-Y. Lee, R. Kaneko, L. E.
Chern, T. Okubo, Y. Yamaji and N. K. &. Y. B. Kim, Nature Communications 11 (2020) 1639.
15. Magnetic field induced competing phases in spin-orbital entangled Kitaev magnets: L. E. Chern, R. Kaneko, H.-Y. Lee* Joint research among groups within ISSP.

182

ISSP Activity Report 2019and Y. B. Kim, Phys. Rev. Research 2 (2020) 013014.
16. * 分子動力学計算による複雑流体中のカルマン渦の解析 : 浅野 優太 , 渡辺 宙志 , 野口 博司 , 分子シミュレーション学会誌" アンサンブル " 22 (2020) 157-162.

Uwatoko group
Recently, a clamp-type cubic anvil high pressure cell that can generate pressure over 7 GPa at 3 K was developed for
low-temperature high-pressure neutron diffraction measurements. The characteristics of the clamp-type cubic anvil highpressure cell have been presented and its performances are demonstrated by measuring magnetic neutron scattering underpressure on MnP single crystal samples. New pressure induced unconventional superconductivity has been discovered on
CeNiC2 at near 11 GPa. The transition temperature Tc is 3.5 K, the highest in all Ce heavy-fermion superconductors, implying
quite strong electron pairings with a high-energy scale. The n-type HgCr2Se4 show a very unique single-valent FM metallic
system which involves strong coupling between lattice, electronic, and magnetic degrees of freedom. High pressure suppresses
the FM order by enhancing the AFM exchange couplings, and gradually stabilizes the spiral magnetic and insulating groundstate. On the other hand, the magnetic field can easily modify the magnetic interactions to switch the ground state back to the
FM metallic state. In the Cr0.0005NbSe2 superconductor, hydrostatic pressure has been shown a very effective means to significantly enhance Tc, Jc, , Hirr, and flux pinning. The pressure introduces more point defects in sample, and it is responsible forenhancement Jc. The hydrostatic pressure stabilizes a strong δl pinning mechanism. In addition, the point pinning is more
dominant than surface pinning under high pressure. The pressure enhanced the Hc1, Hc2, Hirr, and reduces both coherence lengthand penetration depth which are responsible for the pinning mechanism. A two-stage 6-8 multi-anvil apparatus for accurate
high-pressure and low-temperature measurements has been developed. By using tungsten carbide second-stage cubes withtruncated corners of 3 mm and castable octahedral gasket with an edge length of 6 mm, we can generate pressures over 20 GPa
at a relatively low loading force of 100 ton.
1.

Development of cubic anvil type high pressure apparatus for neutron diffraction: S. E. Dissanayake, M. Matsuda,
K. Munakata, H. Kagi, J. Gouchi and Y. Uwatoko, J. Phys.: Condens. Matter 31 (2019) 384001(1-5).

2.

Effect of pressure on the self-hole-doped superconductor RbGd2Fe4As4O2: J. P. Sun, Z.-C. Wang, Z. Y. Liu, S. X. Xu,
T. Eto, Y. Sui, B. S. Wang, Y. Uwatoko, G.-H. Cao and J.-G. Cheng, J. Phys.: Condens. Matter 31 (2019) 044001(1-7).

3.

77Se-NMR Study under Pressure on 12%-S Doped FeSe: T. Kuwayama, K. Matsuura, Y. Mizukami, S. Kasahara,

4.

†*Superconductivity of Electron-Doped NdOBiS

2 by Substitution of Mixed-Valence Ce Ions: N. Kase, M. Matsumoto,
K. Kondo, J. Gouchi, Y. Uwatoko, T. Sakakibara and N. Miyakawa, J. Phys. Soc. Jpn. 88 (2019) 103703(1-5).

5.

Temperature–Pressure Phase Diagram of Antiferromagnet CeAl: R. Tsunoda, Y. Hirose, T. Koitabashi, Y. Sase, R.
Kulkarni, A. Thamizhavel, S. K. Dhar, J. Gouchi, Y. Uwatoko and R. Settai, J. Phys. Soc. Jpn. 88 (2019) 034707(1-5).

6.

Coexistence of localized and heavy itinerant states in antiferromagnetic CePtGe2: T. Nakano, S. Onuma, N. Takeda,
K. Uhlirova, J. Prokleska, V. Sechovsky, J. Gouchi and Y. Uwatoko, Phys. Rev. B 100 (2019) 035107(1-6).

7.

Enhanced orbital fluctuations in Mg-doped MnV2O4 single crystals: Q.-Y. Liu, Z.-Y. Liu, X.-B. Zhou, T. Yajima,
Y. Uwatoko, J.-G. Cheng, L. Tao, Z.-G. Liu, M.-X. Huo, X.-J. Wang and Y. Sui, Phys. Rev. B 100 (2019) 224418(1-6).

8.

Exotic superconductivity in noncentrosymmetric and magnetic CeNiC2 revealed under high pressure: S. Katano, M. Ito,
K. Shibata, J. Gouchi, Y. Uwatoko, K. Matsubayashi, H. Soeda and H. Takahashi, Phys. Rev. B 99 (2019) 100501(1-5).

9.

Pressure-induced enhancement of superconductivity and quantum criticality in the 12442-type hybrid-structure superconductor KCa2F4As4F2: B. Wang, Z.-C. Wang, K. Ishigaki, K. Matsubayashi, T. Eto, J. Sun, J.-G. Cheng, G.-H. Caoand Y. Uwatoko, Phys. Rev. B 99 (2019) 014501(1-6).

Y. Matsuda, T. Shibauchi, Y. Uwatoko and N. Fujiwara, J. Phys. Soc. Jpn. 88 (2019) 033703.

10. †*Large Enhancement of Thermoelectric Efficiency Due to a Pressure-Induced Lifshitz Transition in SnSe:
T. Nishimura, H. Sakai, H. Mori, K. Akiba, H. Usui, M. Ochi, K. Kuroki, A. Miyake, M. Tokunaga, Y. Uwatoko,
K. Katayama, H. Murakawa and N. Hanasaki, Phys. Rev. Lett. 122 (2019) 226601(1-6).
11. Magnetic-Competition-Induced Colossal Magnetoresistance in n-Type HgCr2Se4 under High Pressure: J.-P. Sun, Y.-Y.
Jiao, C.-J. Yi, S.-E. Dissanayake, M. Matsuda, Y. Uwatoko, Y.-G. Shi, Y.-Q. Li, Z. Fang and J.-G. Cheng, Phys. Rev.
Lett. 123 (2019) 047201(1-6).
12. In-Field Heat Treatment Effect on Nitridation of Sm2Fe17: M. Onoue, R. Kobayashi, Y. Mitsui, R. Y. Umetsu,
Y. Uwatoko and K. Koyama, Mater. Trans. 60 (2019) 2179.
13. Pressure-induced hydrogen localization coupled to a semiconductor–insulator transition in a hydrogen-bonded
molecular conductor: A. Ueda, K. Kishimoto, T. Isono, S. Yamada, H. Kamo, K. Kobayashi, R. Kumai, Y. Murakami,† Joint research with outside partners.

ISSP Activity Report 2019183

J. Gouchi, Y. Uwatoko, Y. Nishio and H. Mori, RSC Adv. 9 (2019) 18353-18358.
14. *Novel excitations near quantum criticality in geometrically frustrated antiferromagnet CsFeCl3: S. Hayashida,
M. Matsumoto, M. Hagihala, N. Kurita, H. Tanaka, S. Itoh, T. Hong, M. Soda, Y. Uwatoko and T. Masuda, Sci. Adv. 5(2019) eaaw5639(1-5).
15. High-pressure phase of CrSb2: A new quasi-one-dimensional itinerant magnet with competing interactions: Y. Y. Jiao,
Z. Y. Liu, M. A. McGuire, S. Calder, J. -Q. Yan, B. C. Sales, J. P. Sun, Q. Cui, N. N. Wang, Y. Sui, Y. Uwatoko, B. S.
Wang, X. L. Dong and J. -G. Cheng, Phys. Rev. Materials 3 (2019) 074404(1-10).
16. Suppression of the antiferromagnetic metallic state in the pressurized MnBi2Te4: K. Y. Chen, B. S. Wang, J. -Q. Yan,
D. S. Parker, J. -S. Zhou, Y. Uwatoko and J. -G. Cheng, Phys. Rev. Materials 3 (2019) 094201(1-9).
17. †Magnetic anisotropy of single-crystal ferromagnetic Ce3RuSn6: K. Wakiya, T. Tomaki, M. Kimura, M. Uehara,
J. Gouchi, Y. Uwatoko and I. Umehara, Journal of Magnetism and Magnetic Materials 471 (2019) 274-277.
18. Weak itinerant-electron ferromagnetism of CrAlGe modified by 3d transition metal: H. Masumitsu, S. Yoshinaga,
Y. Mitsui, R. Y. Umetsu, M. Hiroi, Y. Uwatoko and K. Koyama, Journal of Magnetism and Magnetic Materials 492(2019) 165677(1-5).
19. †Anomalous ferromagnetic ordering in EuCuP: W. Iha, M. Kakihana, S. Matsuda, F. Honda, Y. Haga, T. Takeuchi,
M. Nakashima, Y. Amako, J. Gouchi, Y. Uwatoko, M. Hedo, T. Nakama and Y. Ônuki, Journal of Alloys and Compounds
788 (2019) 361-366.
20. Intermediate valence state of Ce in the novel quaternary compound CeRu2Sn2Zn18: K. Wakiya, Y. Sugiyama,
T. Komagata, M. Uehara, H. Sato, J. Gouchi, Y. Uwatoko and I. Umehara, Journal of Alloys and Compounds 797 (2019)309-313.
21. *The effects of high pressure and superheating on the planar growth of Al3Ni phase in hypo-peritectic Al-30wt%Ni
alloy: X. H. Wang, H. W. Wang, C. M. Zou, Z. J. Wei, Y. Uwatoko, J. Gouchi, D. Nishio-Hamane and H. Gotou, Journalof Alloys and Compounds 772 (2019) 1052-1060.
22. Enhancement of superconducting properties and flux pinning mechanism on Cr0.0005NbSe2 single crystal under Hydrostatic pressure: S. Arumugam, M. Krishnan, K. Ishigaki, J. Gouchi, R. Pervin, G. Kalai Selvan, P. M. Shirage andY. Uwatoko, Sci Rep 9 (2019) 347(1-12).
23. Robust two-gap strong coupling superconductivity associated with low-lying phonon modes in pressurized Nb5Ir3O
superconductors: B. Wang, Y. Zhang, S. Xu, K. Ishigaki, K. Matsubayashi, J.-G. Cheng, H. Hosono and Y. Uwatoko,
Chinese Phys. B 28 (2019) 107401(1-7).
24. Correction for Li et al., Pressure-induced phase transitions and superconductivity in a black phosphorus single crystal:
X. Li, J. Sun, P. Shahi, M. Gao, A. H. MacDonald, Y. Uwatoko, T. Xiang, J. B. Goodenough, J. Cheng and J. Zhou, Proc
Natl Acad Sci USA 116 (2019) 1065.
25. Nuanced superconductivity in endohedral gallide Mo8Ga41: P. Neha1, P. Sivaprakash, K. Ishigaki, G. Kalaiselvan,
K. Manikandan, R. S. Dhaka and Y. Uwatoko, Materials Research Express 6 (2019) 016002.
26. Development of High-Field and High-Pressure ESR System and Application to Triangular Antiferromagnet CsCuCl3:
R. Okuto, E. Ohki, T. Sakurai, K. Hijii, H. Takahashi, E. Ohmichi, S. Okubo, H. Ohta, Y. Uwatoko and H. Tanaka, Appl
Magn Reson 50 (2019) 1059(1059-1065).
27. Development of two-stage multi-anvil apparatus for low-temperature measurements: K. Ishigaki, J. Gouchi,
S. Nagasaki, J. G. Cheng and Y. Uwatoko, Pap. Phys. 11 (2019) 110006(1-6).
28. Pressure-induced Lifshitz transition in FeSe0.88S0.12 probed via 77Se-NMR: T. Kuwayama, K. Matsuura, Y. Mizukami,
S. Kasahara, Y. Matsuda, T. Shibauchi, Y. Uwatoko and N. Fujiwara, Pap. Phys. 11 (2019) 110003(1-4).
29. Pressure effect on the magnetoresistivity of topological semimetal RhSn: S. Xu, S. Xu, J. Sun, B. Wang, Y. Uwatoko,
T. Xia and J. Cheng, J. Phys.: Condens. Matter 32 (2020) 355601(1-6).
30. Magnetoelectric Effect in the Antiferromagnetic Ordered State of Ce3TiBi5 with Ce Zig-Zag Chains: M. Shinozaki,
G. Motoyama, M. Tsubouchi, M. Sezaki, J. Gouchi, S. Nishigori, T. Mutou, A. Yamaguchi, K. Fujiwara, K. Miyoshi and
Y. Uwatoko, J. Phys. Soc. Jpn. 89 (2020) 033703(1-5).
31. Quantum Criticality of Valence Transition for the Unique Electronic State of Antiferromagnetic Compound EuCu2Ge2:
J. Gouchi, K. Miyake, W. Iha, M. Hedo, T. Nakama, Y. Ônuki and Y. Uwatoko, J. Phys. Soc. Jpn. 89 (2020) 053703(1-5).

* Joint research among groups within ISSP.

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32. High pressure investigation of an organic three-dimensional Dirac semimetal candidate having a diamond lattice:
A. Kiswandhi, M. Maesato, S. Tomeno, Y. Yoshida, Y. Shimizu, P. Shahi, J. Gouchi, Y. Uwatoko, G. Saito and H.
Kitagawa, Phys. Rev. B 101 (2020) 245124(1-7).
33. *Magnetotransport properties of tellurium under extreme conditions: K. Akiba, K. Kobayashi, T. C. Kobayashi,
R. Koezuka, A. Miyake, J. Gouchi, Y. Uwatoko and M. Tokunaga, Phys. Rev. B 101 (2020) 245111(1-6).
34. Physical properties and pressure-induced superconductivity in the single-crystalline band insulator SnO: S. Xu, Y. Zou,
J. Sun, Z. Liu, X. Yu, J. Gouchi, Y. Uwatoko, Z. G. Cheng, B. Wang and J. Cheng, Phys. Rev. B 101 (2020) 104501(1-8).
35. Pressure‐Driven Eu2+‐Doped BaLi2Al2Si2N6 : A New Color Tunable Narrow‐Band Emission Phosphor for Spectroscopy
and Pressure Sensor Applications: Y. Wang, T. Seto, K. Ishigaki, Y. Uwatoko, G. Xiao, B. Zou, G. Li, Z. Tang, Z. Li andY. Wang, Adv. Funct. Mater. 1 (2020) 2001384(1-10).
36. *Single Crystal Growth and Unique Electronic States of Cubic Chiral EuPtSi and Related Compounds: Y. Ônuki,
M. Kakihana, W. Iha, K. Nakaima, D. Aoki, A. Nakamura, F. Honda, M. Nakashima, Y. Amako, J. Gouchi, Y. Uwatoko,
S. Nakamura, T. Sakakibara, T. Takeuchi, Y. Haga, H. Ikeda, H. Harima, M. Hedo and T. Nakama, JPS Conf. Proc. 29(2020) 012001(1-9).
37. *Unique Skyrmion Phases and Conduction Electrons in Cubic Chiral Antiferromagnet EuPtSi and Related Compounds:
Y. Ônuki, M. Kakihana, W. Iha, K. Nakaima, D. Aoki, A. Nakamura, F. Honda, M. Nakashima, Y. Amako, J. Gouchi,
Y. Uwatoko, S. Nakamura, T. Sakakibara, T. Takeuchi, Y. Haga, H. Ikeda, H. Harima, M. Hedo and T. Nakama, JPS
Conf. Proc. 30 (2020) 011008(1-11).
38. Pressure effect on the anomalous Hall effect of ferromagnetic Weyl semimetal Co3Sn2S2: Z. Y. Liu, T. Zhang, S. X. Xu,
P. T. Yang, Q. Wang, H. C. Lei, Y. Sui, Y. Uwatoko, B. S. Wang, H. M. Weng, J. P. Sun and J. -G. Cheng, Phys. Rev.
Materials 4 (2020) 044203(1-9).
39. Heat treatment effect on the magnetic properties and martensitic transformations of MnCoGe: K. Noguchi,
R. Kobayashi, Y. Mitsui, R. Y. Umetsu, J. Gouchi, Y. Uwatoko and K. Koyama, Journal of Magnetism and Magnetic
Materials 499 (2020) 166199(1-5).
40. Magnetic field-induced nitridation of Sm2Fe17: M. Onoue, R. Kobayashi, Y. Mitsui, R. Y. Umetsu, Y. Uwatoko andK. Koyama, Journal of Alloys and Compounds 835 (2020) 155193(1-7).
41. Quasi-one-dimensional magnetic interactions and conduction electrons in EuCu5 and EuAu5 with the characteristic hexagonal structure: S. Matsuda, J. Ota, K. Nakaima, W. Iha, J. Gouchi, Y. Uwatoko, M. Nakashima, Y. Amako,
F. Honda, D. Aoki, A. Nakamura, T. Takeuchi, Y. Haga, H. Harima, M. Hedo, T. Nakama and Y. Ônuki, Philosophical
Magazine JAN 2020 (2020) 1-14.
42. Redetermination of the crystal structure of R5Si4(R= Pr, Nd) from single-crystal X-ray diffraction data: K. Yokota,
R. Watanuki, M. Nakashima, M. Uehara, J. Gouchi, Y. Uwatoko and I. Umehara, Acta Crystallogr E Cryst Commun 76(2020) 510.
43. Pressure-Induced Metallization and Structural Phase Transition in the Quasi-One-Dimensional TlFeSe2: Z.-Y. Liu,
Q.-X. Dong, P.-F. Shan, Y.-Y. Wang, J.-H. Dai, R. Jana, K.-Y. Chen, J.-P. Sun, B.-S. Wang, X.-H. Yu, G.-T. Liu,
Y. Uwatoko, Y. Sui, H.-X. Yang, G.-F. Chen and J.-G. Cheng, Chinese Phys. Lett. 37 (2020) 047102.

Ozaki group
The interplay of hopping parameters that can give rise to flat bands in consequence of quantum interference in electronic,
photonic, and other interesting materials has become an extensively studied topic. Most of the recognized structures having flatbands are lattices that can be understood by the mathematical theory of line graphs, such as the Lieb, kagome, and checkerboard
lattices. We theoretically explored possible novel lattices having flat bands rather than widely known lattices such as Kagome,
Lieb, checker board lattices, and demonstrated that the structures that can realize the same kinds of flat bands given by thosewell-known lattices hosting exotic quantum phases are more flexible. The flat bands belonging to the recognized structures canbe ideally embedded into new structures that cannot be considered as the original ones in terms of a unitary transformation.
The uncovered mechanism enriches the understanding of physics behind the localized quantum states and broadens the choiceof materials that can be used for designing electronic and photonic devices from the zero band dispersion. With the theoreticalprediction, we have been collaborating with experimental groups who have been trying to experimentally realize one of thepredicted structures. Our collaboration between theoretical and experimental groups seems to have a possitive evidence.
1.

Efficient Algorithm Based on Liechtenstein Method for Computing Exchange Coupling Constants Using Localized
Basis Set: A. Terasawa, M. Matsumoto, T. Ozaki and Y. Gohda, J. Phys. Soc. Jpn. 88 (2019) 114706.
† Joint research with outside partners.

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185

2.

Hidden mechanism for embedding the flat bands of Lieb, kagome, and checkerboard lattices in other structures: C.-C.
Lee, A. Fleurence, Y. Yamada-Takamura and T. Ozaki, Phys. Rev. B 100 (2019) 045150.

3.

Transport properties of rocksalt-type cluster sulfides V4GeS8 and Mn substitution effect: M. Miyata, T. Ozaki and
M. Koyano, Jpn. J. Appl. Phys. 58 (2019) 061008.

4.

*Scanning tunneling microscopy on cleaved Mn Sn(0001) surface: H.-H. Yang, C.-C. Lee, Y. Yoshida, M. Ikhlas,
3

T. Tomita, A. Nugroho, T. Ozaki, S. Nakatsuji and Y. Hasegawa, Sci. Rep. 9 (2019) 9677(1-7).

5.

Formation of hBN monolayers through nitridation of epitaxial silicene on diboride thin films: K. Aoyagi, F. B. Wiggers,
R. Friedlein, F. Gimbert, A. Fleurence, T. Ozaki and Y. Yamada-Takamura, Journal of Applied Physics 126 (2019)135305.

6.

Parametrization of LSDA+U for noncollinear magnetic configurations: Multipolar magnetism in UO2: S. L. Dudarev,
P. Liu, D. A. Andersson, C. R. Stanek, T. Ozaki and C. Franchini, Phys. Rev. Materials 3 (2019) 083802.

7.

OpenMX Viewer: A web-based crystalline and molecular graphical user interface program: Y.-T. Lee and T. Ozaki,
Journal of Molecular Graphics and Modelling 89 (2019) 192.

8.

Benchmark of density functional theory for superconductors in elemental materials: M. Kawamura, Y. Hizume andT. Ozaki, Phys. Rev. B 101 (2020) 134511.

9.

Structural investigation of ternary PdRuM (M = Pt, Rh, or Ir) nanoparticles using first-principles calculations: H. Akiba,
O. Yamamuroa and T. Ozaki, RSC Advances 10 (2020) 16527.

10. Neural network atomic potential to investigate the dislocation dynamics in bcc iron: H. Mori and T. Ozaki, Phys. Rev.
Materials 4 (2020) 040601(R).

Noguchi group
We have studied the membrane shape transformations by proteins. (1) effects of chirality, (2) F-BAR protein adhesion, (3)detachment from a flat substrate, and (4) electrostatic interactions. We also studeid (5) fracture of polymer material, (6) the
finite-size effects on Karman vortex, and (7) treatment of angular-momentum conservation in the Navier-Stokes equation.
1.

*Finite-Size Effects on Kármán Vortex in Molecular Dynamics Simulation: Y. Asano, H. Watanabe and H. Noguchi,

2.

Cup-to-vesicle transition of a fluid membrane with spontaneous curvature: H. Noguchi, J. Chem. Phys. 151 (2019)094903.

3.

Angular-momentum conservation in discretization of the Navier-Stokes equation for viscous fluids: H. Noguchi, Phys.
Rev. E 99 (2019) 023307.

4.

Coarse-grained molecular dynamics simulation for uptake of nanoparticles into a charged lipid vesicle dominated byelectrostatic interactions: N. Shimokawa, H. Ito and Y. Higuchi, Phys. Rev. E 100 (2019) 012407.

5.

Stress Transmitters at the Molecular Level in the Deformation and Fracture Processes of the Lamellar Structure of
Polyethylene via Coarse-Grained Molecular Dynamics Simulations: Y. Higuchi, Macromolecules 52 (2019) 6201.

6.

Detachment of a fluid membrane from a substrate and vesiculation: H. Noguchi, Soft Matter 15 (2019) 8741.

7.

Limiting shapes of confined lipid vesicles: B. Kavcic, A. Sakashita, H. Noguchi and P. Ziherl, Soft Matter 15 (2019)602-614.

8.

*SIMD vectorization for the Lennard-Jones potential with AVX2 and AVX-512 instructions: H. Watanabe and K. M.

9.

Curvature induction and sensing of the F-BAR protein Pacsin1 on lipid membranes via molecular dynamics simulations:
Md. Iqbal Mahmood, H. Noguchi and K.-I. Okazaki, Sci Rep 9 (2019) 14557.

J. Phys. Soc. Jpn. 88 (2019) 075003.

Nakagawa, Computer Physics Communications 237 (2019) 1-7.

10. Shape transition from elliptical to cylindrical membrane tubes induced by chiral crescent-shaped protein rods:
H. Noguchi, Sci Rep 9 (2019) 11721.
11. †Effects of cavitation on Kármán vortex behind circular-cylinder arrays: A molecular dynamics study: Y. Asano,
H. Watanabe and H. Noguchi, J. Chem. Phys. 152 (2020) 034501.
12. * 分子動力学計算による複雑流体中のカルマン渦の解析 : 浅野 優太 , 渡辺 宙志 , 野口 博司 , 分子シミュレーション学会誌* Joint research among groups within ISSP.

186

ISSP Activity Report 2019" アンサンブル " 22 (2020) 157-162.

13. †Rational Design Principles of Attenuated Cationic Lytic Peptides for Intracellular Delivery of Biomacromolecules:
N. Tamemoto, M. Akishiba, K. Sakamoto, K. Kawano, H. Noguchi and S. Futaki, Mol. Pharmaceutics 17 (2020)
2175-2185.

Materials Synthesis and Characterization group1.

Effects of Y substitution on the electronic structure and charge dynamics of SmS: Y. Yokoyama, H. Hasegawa,Y. Mizuno, D. Asai, Y. Okamoto, H. S. Suzuki, K. Takehana, Y. Imanaka and K. Takenaka, Phys. Rev. B 100 (2019)245143.

2.

*Evaluation of spin diffusion length and spin Hall angle of the antiferromagnetic Weyl semimetal Mn Sn: P. K. Muduli,33.

†*S=1/2 ferromagnetic Heisenberg chain in a verdazyl-based complex: N. Uemoto, Y. Kono, S. Kittaka, T. Sakakibara,

4.

†*Contrasting Pressure-Induced Metallization Processes in Layered Perovskites, α-Sr2MO4(M=V,Cr): T. Yamauchi,

5.

†*Topochemical synthesis of phase-pure Mo2AlB2 through staging mechanism: K. Kim, C. Chen, D. Nishio-Hamane,

6.

T. Higo, T. Nishikawa, D. Qu, H. Isshiki, K. Kondou, D. Nishio-Hamane, S. Nakatsuji and Y. Otani, Phys. Rev. B 99
(2019) 184425.
T. Yajima, Y. Iwasaki, S. Miyamoto, Y. Hosokoshi and H. Yamaguchi, Phys. Rev. B 99 (2019) 094418(1-6).
T. Shimazu, D. Nishio-Hamane and H. Sakurai, Phys. Rev. Lett. 123 (2019) 156601.
M. Okubo and A. Yamada, Chem. Commun. 55 (2019) 9295.

*Minakawaite and platinum–group minerals in the placer from the clinopyroxenite area in serpentinite mélange ofKurosegawa belt, Kumamoto Prefecture, Japan: D. NISHIO–HAMANE, T. TANAKA and T. SHINMACHI, Journal of
Mineralogical and Petrological Sciences 114 (2019) 252.
7.

†*Magnetic Properties of SmFe3-Type Sm–Zr–Fe–Co–Ti Melt-Spun Ribbons: T. Saito, T. Horita and D. Nishio-

8.

Ultrafast electronic relaxation dynamics in a valence fluctuation material Sm0.83Y0.17S: R. Ikeda, H. Watanabe,
Y. Negoro, Y. Takeno, K. Imura, H. S. Suzuki, N. K. Sato and S. Kimura, J. Phys.: Conf. Ser. 1220 (2019) 012005.

9.

†*Magnetic properties of SmFe12-based magnets produced by spark plasma sintering method: T. Saito, F. Watanabe andHamane, Mater. Trans. 60 (2019) 1384.

D. Nishio-Hamane, Journal of Alloys and Compounds 773 (2019) 1018.

10. *The effects of high pressure and superheating on the planar growth of Al3Ni phase in hypo-peritectic Al-30wt%Ni
alloy: X. H. Wang, H. W. Wang, C. M. Zou, Z. J. Wei, Y. Uwatoko, J. Gouchi, D. Nishio-Hamane and H. Gotou, Journalof Alloys and Compounds 772 (2019) 1052-1060.
11. Giant isotropic negative thermal expansion in Y-doped samarium monosulfides by intra-atomic charge transfer:
K. Takenaka, D. Asai, R. Kaizu, Y. Mizuno, Y. Yokoyama, Y. Okamoto, N. Katayama, H. S. Suzuki and Y. Imanaka, Sci
Rep 9 (2019) 122.
12. †*Contrasted Sn substitution effects on Dirac line node semimetals SrIrO3 and CaIrO3 : M. Negishi, N. Hiraoka,
D. Nishio-Hamane and H. Takagi, APL Materials 7 (2019) 121101.
13. †*Phase stability and thermoelectric properties of semiconductor-like tetragonal FeAl 2: K. Tobita, K. Kitahara,
Y. Katsura, N. Sato, D. Nishio-Hamane, H. Gotou and K. Kimura, Science and Technology of Advanced Materials 20(2019) 937.
14. †*Synthesis of Sm(Co,Fe)4B compounds by rapid quenching and subsequent heat treatment: T. Saito and D. NishioHamane, Intermetallics 107 (2019) 6.
15. †*Synthesis and crystal chemistry of mukhinite, V-analogue of clinozoisite on the join Ca2Al3Si3O12(OH)–
Ca2Al2VSi3O12(OH): M. Nagashima, D. Nishio-Hamane, N. Nakano and T. Kawasaki, Phys Chem Minerals 46 (2019)
63.
16. Kondo-Induced Giant Isotropic Negative Thermal Expansion: D. G. Mazzone, M. Dzero, AM. M. Abeykoon,
H. Yamaoka, H. Ishii, N. Hiraoka, J. -P. Rueff, J. M. Ablett, K. Imura, H. S. Suzuki, J. N. Hancock and I. Jarrige, Phys.
Rev. Lett. 124 (2020) 125701.

† Joint research with outside partners.

ISSP Activity Report 2019187

Neutron Science Laboratory
Shibayama group
Shibayama group has been exploring the structure and dynamics of soft matter, especially polymer gels, micelles, thermoresponsive polymers, and thermosets, utilizing a combination of small-angle neutron scattering (SANS), small-angle X-ray
scattering (SAXS), and dynamic light scattering (DLS). The objectives are to elucidate the relationship between the structure
and variety of novel properties/functions of polymer gels/resins. The highlights of 2019 include investigations of (1) RheoSANS study on micellar structures, (2) Formation of clusters in whiskies during maturation process, (3) In situ residual stressanalysis in a phenolic resin and copper composite, (4) Dynamics of critical clusters, (5) Dynamics for microgel suspension, (6)Polymer gel with a highly ordered three-dimensional network, and so on.
1.

Viscoelastic change of block copolymer ion gels in a photo-switchable azobenzene ionic liquid triggered by light:
C. Wang, K. Hashimoto, R. Tamate, H. Kokubo, K. Morishima, X. Li, M. Shibayama, F. Lu, T. Nakanishi and
M. Watanabe, Chem. Commun. 55 (2019) 1710-1713.

2.

†Dynamics of Critical Clusters Synthesized by End-Coupling of Four-Armed Poly(ethylene glycol)s: X. Li, T. Noritomi,

3.

†Transport and Mechanical Properties of ABA-type Triblock Copolymer Ion Gels Correlated with Their Microstruc-

T. Sakai, E. P. Gilbert and M. Shibayama, Macromolecules 52 (2019) 5086-5094.

tures: K. Hashimoto, M. Hirasawa, H. Kokubo, R. Tamate, X. Li, M. Shibayama and M. Watanabe, Macromolecules 52(2019) 8430-8439.

4.

Network structure evolution of a hexamethylenetetramine-cured phenolic resin: A. Izumi, Y. Shudo and M. Shibayama,
Polym J 51 (2019) 155-160.

5.

Chiral crystal-like droplets displaying unidirectional rotational sliding: T. Kajitani, K. Motokawa, A. Kosaka, Y. Shoji,
R. Haruki, D. Hashizume, T. Hikima, M. Takata, K. Yazawa, K. Morishima, M. Shibayama and T. Fukushima, Nature
Mater. 18 (2019) 266-272.

6.

Polymer gel with a flexible and highly ordered three-dimensional network synthesized via bond percolation: X. Li,
S. Nakagawa, Y. Tsuji, N. Watanabe and M. Shibayama, Sci. Adv. 5 (2019) eaax8647(1 - 7).

7.

Precision polymer network science with tetra-PEG gels—a decade history and future: M. Shibayama, X. Li and
T. Sakai, Colloid Polym Sci 297 (2019) 1-12.

8.

Rheo-SANS study on relationship between micellar structures and rheological behavior of cationic gemini surfactants insolution: H. Iwase, R. Kawai, K. Morishima, S.-I. Takata, T. Yoshimura and M. Shibayama, Journal of Colloid and Interface Science 538 (2019) 357-366.

9.

Formation of Clusters in Whiskies During the Maturation Process: K. Morishima, N. Nakamura, K. Matsui, Y. Tanaka,
H. Masunaga, S. Mori, T. Iwashita, X. li and M. Shibayama, Journal of Food Science 84 (2019) 59-64.

10. 光から観たゲル微粒子 : 呉羽 拓真 , 柴山 充弘 , 高分子 68 (2019) 497-498.
11. 高強度イオンゲル膜を用いた CO2 分離 : 橋本 慧 , 藤井 健太 , 柴山 充弘 , ケミカルエンジニヤリング 64 (2019) 32-38.
12. †JRR-3 における中性子散乱全国共同利用 : 柴山 充弘 , 放射線 45 (2019) 89-95.
13. ゲルの構造解析 : 柴山 充弘 ,「ゲルの科学」, 第 7 章 , 長田義仁 , ( 講談社 , 東京 , 2020), 439-505.
14. 膨潤と収縮の速度論 : 柴山 充弘 ,「ゲルの科学」, 第 5 章 , 長田義仁 , ( 講談社 , 東京 , 2020), 345-378.

Yamamuro group
Our laboratory is studying chemical physics of complex condensed matters by using neutron scattering, X-ray diffraction,
calorimetric, dielectric, and viscoelastic techniques. Our target materials are glasses, liquids, and various disordered systems.
In this year, the heat capacity, synchrotron-radiation X-ray diffraction and quasielastic neutron scattering (QENS) experiments were performed for super-high entropy liquid, alkylated perfluorobenzene (PFB), CnCn+4-PFB (n = 4, 6, 8). Theseexperiments revealed that the alkyl-chains are highly disordered and moving very rapidly, stabilizing a liquid state by entropy
effect. The QENS experiment of a novel hydrogen-cluster material Li6NbH11 was carried out to demonstrate that the NbH9
cluster is rotating rapidly with a low energy barrier probably reflecting the unusual shape of the cluster. Another QENS workon Pd0.8Pt0.2H0.36 nanoparticles showed that H atoms possibly give rise to tunneling diffusion at low temperature. We haveconducted an in-situ neutron diffraction experiment of the PdRu alloy nanoparticles supported on CZ (CeO2-ZrO2) underflow condition of model car-exhaust gases. This experiment provided important information for the actual catalytic reaction toremove CO and NOx gases. Other than the above neutron scattering experiments, synchrotron-radiation X-ray diffraction exper* Joint research among groups within ISSP.

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ISSP Activity Report 2019

iments were conducted for vapor-deposited benzene-based molecules and a novel metal-organic framework (MOF) material
which absorbs water and is vitrified by dehydration at high temperature.
1.

Neutron scattering studies of static and dynamic correlation lengths in alkali metal borate glasses: S. Kojima, V. N.
Novikov, M. Kofu and O. Yamamuro, Journal of Non-Crystalline Solids 518 (2019) 18-23.

2.

Structural and Thermodynamic Studies of Hydrogen Absorption/Desorption Processes on PdPt Nanoparticles: H. Akiba,
H. Kobayashi, H. Kitagawa, K. Ikeda, T. Otomo, T. Yamamoto, S. Matsumura and O. Yamamuro, J. Phys. Chem. C 123(2019) 9471.

3.

Soft chromophore featured liquid porphyrins and their utilization toward liquid electret applications: A. Ghosh,M. Yoshida, K. Suemori, H. Isago, N. Kobayashi, Y. Mizutani, Y. Kurashige, I. Kawamura, M. Nirei, O. Yamamuro,
T. Takaya, K. Iwata, A. Saeki, K. Nagura, S. Ishihara and T. Nakanishi, Nature Commun. 10 (2019) 4210.

4.

Universality and Structural Implications of the Boson Peak in Proteins: H. Nakagawa, Y. Joti, A. Kitao, O. Yamamuroand M. Kataoka, Biophysical Journal 117 (2019) 229.

5.

Dynamics of Atomic Hydrogen in Palladium Probed by Neutron Spectroscopy: M. Kofu and O. Yamamuro, J. Phys.
Soc. Jpn. 89 (2020) 051002.

6.

Rational Synthesis for a Noble Metal Carbide: T. Wakisaka, K. Kusada, D. Wu, T. Yamamoto, T. Toriyama, S. Matsumura, H. Akiba, O. Yamamuro, K. Ikeda, T. Otomo, N. Palina, Y. Chen, L. S. R. Kumara, C. Song, O. Sakata, W. Xie,
M. Koyama, Y. Kubota, S. Kawaguchi, R. L. Arevalo, S. M. Aspera, E. F. Arguelles, H. Nakanishi and H. Kitagawa,J. Am. Chem. Soc. 142 (2020) 1247.

7.

New Insights on the Formation Process and Thermodynamics of the α-Phase PdH(D) x through Direct Enthalpy
Measurement of H(D) Dissolution: S. Dekura, H. Akiba, O. Yamamuro, H. Kobayashi, M. Maesato and H. Kitagawa,J. Phys. Chem. C 124 (2020) 8663-8668.

Masuda group
The goal of our research is to discover a new quantum phenomenon and to reveal the mechanism of it. In this fiscal year westudied the following topics; neutron scattering study of the quasi-one-dimensional antiferromagnet Ba2CoSi2O7, magnon pairs
and spin-nematic correlation in the spin seebeck effect, novel excitations near quantum criticality in geometrically frustrated
antiferromagnet CsFeCl3, and magnetic states of coupled spin tubes with frustrated geometry in CsCrF4.
1.

A Possible Magnetic Structure of the Cluster-Based Haldane Compound Fedotovite K2Cu3O(SO4)3: M. Hase, K. C.
Rule, J. R. Hester, J. A. Fernandez-Baca, T. Masuda and Y. Matsuo, J. Phys. Soc. Jpn. 88 (2019) 094708(1-5).

2.

Substitution Effects on Magnetic Ground States with Geometrical Spin Frustration in Triangular Spin Tubes Formedin CsCrF4 and α-KCrF4: H. Manaka, H. Morita, T. Akasaka, Y. Miura, M. Hagihala, S. Hayashida, M. Soda and T.
Masuda, J. Phys. Soc. Jpn. 88 (2019) 114703(1-13).

3.

Neutron scattering study of the quasi-one-dimensional antiferromagnet Ba2CoSi2O7: M. Soda, T. Hong, M. Avdeev,
H. Yoshizawa, T. Masuda and H. Kawano-Furukawa, Phys. Rev. B 100 (2019) 144410(1-6).

4.

Magnon Pairs and Spin-Nematic Correlation in the Spin Seebeck Effect: D. Hirobe, M. Sato, M. Hagihala, Y. Shiomi,
T. Masuda and E. Saitoh, Phys. Rev. Lett. 123 (2019) 117202(1-7).

5.

Development of Compact High Field Pulsed Magnet System for New Sample Environment Equipment at MLF
in J-PARC: M. Watanabe, H. Nojiri, S. Itoh, S. Ohira-Kawamura, T. Kihara, T. Masuda, T. Sahara, M. Soda and
R. Takahashi, JPS Conf. Proc. 25 (2019) 011024(1-5).

6.

Progress in High Resolution Chopper Spectrometer HRC by improving collimator and Fermi chopper: S. Itoh, T. Yokoo,
T. Masuda, S. Asai, H. Saito, D. Kawana, R. Sugiura, T. Asami and Y. Ihata, Physica B: Condensed Matter 568 (2019)76-80.

7.

*Novel excitations near quantum criticality in geometrically frustrated antiferromagnet CsFeCl : S. Hayashida,38.

Magnetic states of coupled spin tubes with frustrated geometry in CsCrF4: M. Hagihala, S. Hayashida, M. Avdeev,
H. Manaka, H. Kikuchi and T. Masuda, npj Quantum Mater. 4 (2019) 14(1-9).

9.

Horizontal Line Nodes in Sr2RuO4 Proved by Spin Resonance: K. Iida, M. Kofu, K. Suzuki, N. Murai, S. OhiraKawamura, R. Kajimoto, Y. Inamura, M. Ishikado, S. Hasegawa, T. Masuda, Y. Yoshida, K. Kakurai, K. Machida and

M. Matsumoto, M. Hagihala, N. Kurita, H. Tanaka, S. Itoh, T. Hong, M. Soda, Y. Uwatoko and T. Masuda, Sci. Adv. 5(2019) eaaw5639(1-5).

† Joint research with outside partners.

ISSP Activity Report 2019189

S. Lee, J. Phys. Soc. Jpn. 89 (2020) 053702(1-5).
10. Emergent spin-1 Haldane gap and ferroelectricity in a frustrated spin- 1/2 ladder: H. Ueda, S. Onoda, Y. Yamaguchi,
T. Kimura, D. Yoshizawa, T. Morioka, M. Hagiwara, M. Hagihala, M. Soda, T. Masuda, T. Sakakibara, K. Tomiyasu,
S. Ohira-Kawamura, K. Nakajima, R. Kajimoto, M. Nakamura, Y. Inamura, N. Reynolds, M. Frontzek, J. S. White,
M. Hase and Y. Yasui, Phys. Rev. B 101 (2020) 140408(1-16).
11. Helical and collinear spin density wave order in the S = 1/2 one-dimensional frustrated chain compound
NaCuMoO4(OH) investigated by neutron scattering: S. Asai, T. Oyama, K. Nawa, A. Nakao, K. Munakata,
K. Kuwahara, M. Hagihala, S. Itoh, Z. Hiroi and T. Masuda, Phys. Rev. B 101 (2020) 144437(1-8).
12. Zero-energy excitation in the classical kagome antiferromagnet NaBa2Mn3F11: S. Hayashida, H. Ishikawa,Y. Okamoto, T. Okubo, Z. Hiroi, G. J. Nilsen, H. Mutka and T. Masuda, Phys. Rev. B 101 (2020) 214409.
13. The f-electron State of the Heavy Fermion Superconductor NpPd5Al2 and the Isostructural Family: N. Metoki, A. A.
Aczel, D. Aoki, S. Chi, J. A. Fernandez-Baca, J.-C. Griveau, M. Hagihala, T. Hong, Y. Haga, K. Ikeuchi, Y. Inamura,
K. Kamazawa, R. Kajimoto, H. Kitazawa, T. Masuda, M. Matsuda, M. Nakamura, J. Ohtsuki, D. Pajerowski, H. S.
Suzuki, E. Yamamoto and H. Yamauchi, JPS Conf. Proc. 30 (2020) 011123(1-6).
14. Establishing the carrier scattering phase diagram for ZrNiSn-based half-Heusler thermoelectric materials: Q. Ren, C. Fu,
Q. Qiu, S. Dai, Z. Liu, T. Masuda, S. Asai, M. Hagihala, S. Lee, S. Torri, T. Kamiyama, L. He, X. Tong, C. Felser, D. J.
Singh, T. Zhu, J. Yang and J. Ma, Nat Commun 11 (2020) 3142(1-9).

Nakajima group
Nakajima group started from October 2019, and has been studying magnetic materials showing cross-correlated phenomena
originating from symmetry of the magnetic structures. One example is multiferroics, in which spontaneous electric polarization is induced by symmetry breaking in magnetic order. Y-type hexaferrite Ba2-ySryCo2Fe12-xAlxO22 (BSCoFAO) is known to
exhibit the spin-driven ferroelectricity near room temperature. Our collaborators in RIKEN systematically grew high-quality ofsingle crystals of BSCoFAO with varying Ba/Sr ratio. We performed neutron scattering experiments on these crystals, revealingthat the multiferroic phase has a double-fan-type magnetic structure. Another example is the magnetic skyrmion lattice, which
is an array of vortex-like spin objects. We have studied an intermetallic compound Gd3Ru4Al12 with a breathing Kagome latticeby means of neutron and resonant X-ray scattering, revealing that this system exhibits successive field-induced magnetic phasetransitions, in which the skyrmion lattice phase appears as a first-field-induced phase at an intermediate temperature. Most of
the research activities mentioned above were published with Nakajima’s previous affiliation (Quantum Phase Electronics Center
and RIKEN Center for Emergent Matter Science). A full publication list is shown in Nakajima group’s website.
1.

Nanometric square skyrmion lattice in a centrosymmetric tetragonal magnet: N. D. Khanh, T. Nakajima, X. Yu, S. Gao,
K. Shibata, M. Hirschberger, Y. Yamasaki, H. Sagayama, H. Nakao, L. Peng, K. Nakajima, R. Takagi, T.-H. Arima,
Y. Tokura and S. Seki, Nat. Nanotechnol. 15 (2020) 444.

International MegaGauss Science Laboratory
Kindo group
We have developed some new magnets. One magnet has a bore of 22 mm diameter, which is larger than the standard magnet.
This magnet can produce the field up to 60 Tesla with a duration of about 40 msec. Another magnet is a Long-Pulse magnet.
This magnet was developed to generate the field with a duration of about 100 msec. by using a capacitor bank of 10 MJ. Thismagnet is used for the High-Field Collaboratory Project at the High Filed Laboratory of Osaka University.
1.

†High-field Magnetism of the Honeycomb-lattice Antiferromagnet Cu (pymca) (ClO ): A. Okutani, T. Kida, Y.
2
3
4

Narumi, T. Shimokawa, Z. Honda, K. Kindo, T. Nakano, Y. Nozue and M. Hagiwara, J. Phys. Soc. Jpn. 88 (2019)013703(4pages).

2.

†Magnetic Properties of S = 1/2 Antiferromagnetic Alternating Chain in a New Salt (o -MePy-V)(TCNQ): Y. Iwasaki,

3.

†Reduction of the Ordered Magnetic Moment by Quantum Fluctuation in the Antiferromagnetic Spin-5/2 Dimer

Y. Sasaki, Y. Hosokoshi, A. Matsuo, K. Kindo and H. Yamaguchi, J. Phys. Soc. Jpn. 88 (2019) 044709(1-5).

Compound FeVMoO7: M. Hase, J. R. Hester, K. C. Rule, V. Yu. Pomjakushin, A. Matsuo and K. Kindo, J. Phys. Soc.
Jpn. 88 (2019) 034711(6pages).
4.

†Successive Phase Transition at Ambient Pressure in CeCoSi: Single Crystal Studies: H. Tanida, K. Mitsumoto, Y. Muro,* Joint research among groups within ISSP.

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T. Fukuhara, Y. Kawamura, A. Kondo, K. Kindo, Y. Matsumoto, T. Namiki, T. Kuwai and T. Matsumura, J. Phys. Soc.
Jpn. 88 (2019) 054716(1-10).
5.

*Thermodynamic Investigation of Metamagnetism in Pulsed High Magnetic Fields on Heavy Fermion Superconductor

6.

†*Difference in magnetic and ferroelectric properties between rhombohedral and hexagonal polytypes of AgFeO2:

UTe2: S. Imajo, Y. Kohama, A. Miyake, C. Dong, M. Tokunaga, J. Flouquet, K. Kindo and D. Aoki, J. Phys. Soc. Jpn. 88(2019) 083705(1-5).

A single-crystal study: N. Terada, Y. Ikedo, H. Sato, D. D. Khalyavin, P. Manuel, F. Orlandi, Y. Tsujimoto, Y. Matsushita, A. Miyake, A. Matsuo, M. Tokunaga and K. Kindo, Phys. Rev. B 99 (2019) 064402(1-11).
7.

†*Enhancement of the effective mass at high magnetic fields in CeRhIn : L. Jiao, M. Smidman, Y. Kohama, Z. S. Wang,
5

D. Graf, Z. F. Weng, Y. J. Zhang, A. Matsuo, E. D. Bauer, H. Lee, S. Kirchner, J. Singleton, K. Kindo, J. Wosnitza,
F. Steglich, J. D. Thompson and H. Q. Yuan, Phys. Rev. B 99 (2019) 045127(6).
8.

†Evidence of low-energy singlet excited states in the spin-1/2 polyhedral clusters {Mo72V30} and {W72V30} withstrongly frustrated kagome networks: T. Kihara, H. Nojiri, Y. Narumi, Y. Oshima, K. Kindo, C. Heesing, J. Schnack and
A. Müller, Phys. Rev. B 99 (2019) 064430(8).
9.

†Magnetic structure and high-field magnetization of the distorted kagome lattice antiferromagnet Cs Cu SnF :2
3
12

K. Matan, T. Ono, G. Gitgeatpong, K. de Roos, P. Miao, S. Torii, T. Kamiyama, A. Miyata, A. Matsuo, K. Kindo,
S. Takeyama, Y. Nambu, P. Piyawongwatthana, T. J. Sato and H. Tanaka, Phys. Rev. B 99 (2019) 224404(1-12).
10. †*Magnetoelectric behavior from cluster multipoles in square cupolas: Study of Sr(TiO)Cu4(PO4)4 in comparison with
Ba and Pb isostructurals: Y. Kato, K. Kimura, A. Miyake, M. Tokunaga, A. Matsuo, K. Kindo, M. Akaki, M. Hagiwara,
S. Kimura, T. Kimura and Y. Motome, Phys. Rev. B 99 (2019) 024415(1-12).
11. †Observation of a metamagnetic transition in the 5f heavy-fermion compound UNi2Al3 : Magnetization studies up to
90&nbsp;T for single-crystalline U(Pd1−xNix)2Al3: K. Mochidzuki, Y. Shimizu, A. Kondo, A. Matsuo, D. Li, D. Aoki,
Y. Homma, F. Honda, J. Flouquet, D. Nakamura, S. Takeyama and K. Kindo, Phys. Rev. B 100 (2019) 165137(1-8).
12. *Successive electric-polarization switches in the S=1/2 skew chain Co2V2O7 induced by a high magnetic field:
R. Chen, J. F. Wang, Z. W. Ouyang, M. Tokunaga, A. Y. Luo, L. Lin, J. M. Liu, Y. Xiao, A. Miyake, Y. Kohama, C. L.
Lu, M. Yang, Z. C. Xia, K. Kindo and L. Li, Phys. Rev. B 100 (2019) 140403(1-5).
13. †Successive phase transitions and magnetization plateau in the spin-1 triangular-lattice antiferromagnet Ba2La2NiTe2O12
with small easy-axis anisotropy: M. Saito, M. Watanabe, N. Kurita, A. Matsuo, K. Kindo, M. Avdeev, H. O. Jeschke and
H. Tanaka, Phys. Rev. B 100 (2019) 064417(1-12).
14. †Two magnetization plateaus in the kagome fluoride Cs2LiTi 3F12: R. Shirakami, H. Ueda, H. O. Jeschke, H. Nakano,
S. Kobayashi, A. Matsuo, T. Sakai, N. Katayama, H. Sawa, K. Kindo, C. Michioka and K. Yoshimura, Phys. Rev. B 100(2019) 174401(1-7).
15. *Quantum Critical Dynamics of Heisenberg-Ising Chain in a Longitudinal Field: Many-Body Strings versus Fractional
Excitations: Z. Wang, M. Schmidt, A. Loidl, J. Wu, H. Zou, W. Yang, C. Dong, Y. Kohama, K. Kindo, D. I. Gorbunov,
S. Niesen, O. Breuning, J. Engelmayer and T. Lorenz, Phys. Rev. Lett. 123 (2019) 067202.
16. †*Topological transitions among skyrmion- and hedgehog-lattice states in cubic chiral magnets: Y. Fujishiro,
N. Kanazawa, T. Nakajima, X. Z. Yu, K. Ohishi, Y. Kawamura, K. Kakurai, T. Arima, H. Mitamura, A. Miyake, K.
Akiba, M. Tokunaga, A. Matsuo, K. Kindo, T. Koretsune, R. Arita and Y. Tokura, Nat. Commun. 10 (2019) 1059(1-8).
17. *Engelhauptite: A variant of S=1/2 kagome antiferromagnet: H. Ishikawa, D. Nishio-Hamane, A. Miyake, M. Tokunaga,
A. Matsuo, K. Kindo and Z. Hiroi, Phys. Rev. Materials 3 (2019) 064414(1-5).
18. †Frustrated magnetism in the J1−J2 honeycomb lattice compounds MgMnO3 and ZnMnO3 synthesized via a metathesis
reaction: Y. Haraguchi, K. Nawa, C. Michioka, H. Ueda, A. Matsuo, K. Kindo, M. Avdeev, T. J. Sato and K. Yoshimura,Phys. Rev. Materials 3 (2019) 124406(1-9).
19. *Thermodynamic evidence of magnetic-field-induced complete valley polarization in bismuth: A. Iwasa, A. Kondo,
S. Kawachi, K. Akiba, Y. Nakanishi, M. Yoshizawa, M. Tokunaga and K. Kindo, Sci Rep 9 (2019) 1672(1-8).
20. *Multiple topological states in iron-based superconductors: P. Zhang, Z. Wang, X. Wu, K. Yaji, Y. Ishida, Y. Kohama,
G. Dai, Y. Sun, C. Bareille, K. Kuroda, T. Kondo, K. Okazaki, K. Kindo, X. Wang, C. Jin, J. Hu, R. Thomale,
K. Sumida, S. Wu, K. Miyamoto, T. Okuda, H. Ding, G. D. Gu, T. Tamegai, T. Kawakami, M. Sato and S. Shin, Nature
Phys 15 (2019) 41-48.
21. *Strain-induced spontaneous Hall effect in an epitaxial thin film of a Luttinger semimetal: T. Ohtsuki, Z. Tian, A. Endo,† Joint research with outside partners.

ISSP Activity Report 2019191

M. Halim, S. Katsumoto, Y. Kohama, K. Kindo, M. Lippmaa and S. Nakatsuji, Proc. Natl. Acad. Sci. USA 116 (2019)8803-8808.
22. *A series of magnon crystals appearing under ultrahigh magnetic fields in a kagomé antiferromagnet: R. Okuma,
D. Nakamura, T. Okubo, A. Miyake, A. Matsuo, K. Kindo, M. Tokunaga, N. Kawashima, S. Takeyama and Z. Hiroi,
Nature Communications 10 (2019) 1229(7).
23. *Possible observation of quantum spin-nematic phase in a frustrated magnet: Y. Kohama, H. Ishikawa, A. Matsuo,
K. Kindo, N. Shannon and Z. Hiroi, Proc. Nat. Acad. Sci. U.S.A. 116 (2019) 10686-10690.
24. †Multi-Step Magnetic Transitions in EuNiIn 4: S. Ikeda, K. Kaneko, Y. Tanaka, T. Kawasaki, T. Hanashima,
K. Munakata, A. Nakao, R. Kiyanagi, T. Ohhara, K. Mochizuki, A. Kondo, K. Kindo, Y. Homma, M. D. Frontzek and
H. Kobayashi, J. Phys. Soc. Jpn. 89 (2020) 014707(1-7).
25. †Angle-dependent nontrivial phase in the Weyl semimetal NbAs with anisotropic Fermi surface: M. Komada,H. Murakawa, M. S. Bahramy, T. Kida, K. Yokoi, Y. Narumi, K. Kindo, M. Hagiwara, H. Sakai and N. Hanasaki, Phys.
Rev. B 101 (2020) 045135(1-6).
26. *Observation of in-plane magnetic field induced phase transitions in FeSe: J. M. Ok, C. I. Kwon, Y. Kohama, J. S. You,S. K. Park, J.-H. Kim, Y. J. Jo, E. S. Choi, K. Kindo, W. Kang, K.-S. Kim, E. G. Moon, A. Gurevich and J. S. Kim, Phys.
Rev. B 101 (2020) 224509.
27. *Extracting the Chiral Contribution to the Negative Longitudinal Magnetoresistance in Epitaxial Pr2Ir2O7 Thin Films:
T. Ohtsuki, Z. Tian, A. Endo, M. Halim, S. Katsumoto, Y. Kohama, K. Kindo, M. Lippmaa and S. Nakatsuji, JPS Conf.
Proc. 30 (2020) 011181(1-6).

Tokunaga group
The metamagnetic transition has been observed in UTe2, which is expected to realize the spin-triplet superconducting state.
The increase of the electron specific heat coefficient with the metamagnetic transition is estimated through the thermodynamic
consideration of the high field magnetization measurements taken at various temperatures. In this material, field-induced superconductivity has also been reported in this metamagnetic phase. We have provided valuable information on the electronic statebehind magnetic field-induced superconductivity in the early stages of the rapidly advancing physical properties research forthis material.
1.

Metamagnetic Transition in Heavy Fermion Superconductor UTe 2: A. Miyake, Y. Shimizu, Y. J. Sato, D. Li,
A. Nakamura, Y. Homma, F. Honda, J. Flouquet, M. Tokunaga and D. Aoki, J. Phys. Soc. Jpn. 88 (2019) 063706(1-5).

2.

*Thermodynamic Investigation of Metamagnetism in Pulsed High Magnetic Fields on Heavy Fermion Superconductor

3.

*Bidirectional

4.

†*Difference in magnetic and ferroelectric properties between rhombohedral and hexagonal polytypes of AgFeO :2

UTe2: S. Imajo, Y. Kohama, A. Miyake, C. Dong, M. Tokunaga, J. Flouquet, K. Kindo and D. Aoki, J. Phys. Soc. Jpn. 88(2019) 083705(1-5).

surface photovoltage on a topological insulator: T. Yoshikawa, K. Sumida, Y. Ishida, J. Chen,
M. Nurmamat, K. Akiba, A. Miyake, M. Tokunaga, K. A. Kokh, O. E. Tereshchenko, S. Shin and A. Kimura, Phys. Rev.
B 100 (2019) 165311(1-6).
A single-crystal study: N. Terada, Y. Ikedo, H. Sato, D. D. Khalyavin, P. Manuel, F. Orlandi, Y. Tsujimoto, Y. Matsushita, A. Miyake, A. Matsuo, M. Tokunaga and K. Kindo, Phys. Rev. B 99 (2019) 064402(1-11).

5.

†Direct coupling of ferromagnetic moment and ferroelectric polarization in BiFeO : S. Kawachi, S. Miyahara, T. Ito,3

6.

†Magnetic and electrical properties of the ternary compound U Ir Si with one-dimensional uranium zigzag chains:
2 2 5

A. Miyake, N. Furukawa, J.-I. Yamaura and M. Tokunaga, Phys. Rev. B 100 (2019) 140412(1-5).

D. X. Li, F. Honda, A. Miyake, Y. Homma, Y. Haga, A. Nakamura, Y. Shimizu, A. Maurya, Y. J. Sato, M. Tokunaga andD. Aoki, Phys. Rev. B 99 (2019) 054408(1-9).
7.

†*Magnetoelectric behavior from cluster multipoles in square cupolas: Study of Sr(TiO)Cu (PO ) in comparison with4
4 4

Ba and Pb isostructurals: Y. Kato, K. Kimura, A. Miyake, M. Tokunaga, A. Matsuo, K. Kindo, M. Akaki, M. Hagiwara,
S. Kimura, T. Kimura and Y. Motome, Phys. Rev. B 99 (2019) 024415(1-12).
8.

*Successive electric-polarization switches in the S=1/2 skew chain Co V O induced by a high magnetic field:
2 2 7

R. Chen, J. F. Wang, Z. W. Ouyang, M. Tokunaga, A. Y. Luo, L. Lin, J. M. Liu, Y. Xiao, A. Miyake, Y. Kohama, C. L.
Lu, M. Yang, Z. C. Xia, K. Kindo and L. Li, Phys. Rev. B 100 (2019) 140403(1-5).
9.

†*LargeEnhancement of Thermoelectric Efficiency Due to a Pressure-Induced Lifshitz Transition in SnSe:* Joint research among groups within ISSP.

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T. Nishimura, H. Sakai, H. Mori, K. Akiba, H. Usui, M. Ochi, K. Kuroki, A. Miyake, M. Tokunaga, Y. Uwatoko,
K. Katayama, H. Murakawa and N. Hanasaki, Phys. Rev. Lett. 122 (2019) 226601(1-6).
10. †*Topological transitions among skyrmion- and hedgehog-lattice states in cubic chiral magnets: Y. Fujishiro,
N. Kanazawa, T. Nakajima, X. Z. Yu, K. Ohishi, Y. Kawamura, K. Kakurai, T. Arima, H. Mitamura, A. Miyake, K.
Akiba, M. Tokunaga, A. Matsuo, K. Kindo, T. Koretsune, R. Arita and Y. Tokura, Nat. Commun. 10 (2019) 1059(1-8).
11. *Engelhauptite: A variant of S=1/2 kagome antiferromagnet: H. Ishikawa, D. Nishio-Hamane, A. Miyake, M. Tokunaga,
A. Matsuo, K. Kindo and Z. Hiroi, Phys. Rev. Materials 3 (2019) 064414(1-5).
12. Quantized surface transport in topological Dirac semimetal films: S. Nishihaya, M. Uchida, Y. Nakazawa, R. Kurihara,
K. Akiba, M. Kriener, A. Miyake, Y. Taguchi, M. Tokunaga and M. Kawasaki, Nat Commun 10 (2019) 2564(1-7).
13. *Thermodynamic evidence of magnetic-field-induced complete valley polarization in bismuth: A. Iwasa, A. Kondo,
S. Kawachi, K. Akiba, Y. Nakanishi, M. Yoshizawa, M. Tokunaga and K. Kindo, Sci Rep 9 (2019) 1672(1-8).
14. *A series of magnon crystals appearing under ultrahigh magnetic fields in a kagomé antiferromagnet: R. Okuma,
D. Nakamura, T. Okubo, A. Miyake, A. Matsuo, K. Kindo, M. Tokunaga, N. Kawashima, S. Takeyama and Z. Hiroi,
Nature Communications 10 (2019) 1229(7).
15. *105Pd NMR and NQR study of the cubic heavy fermion system Ce3Pd20Si6: I. Jakovac, M. Horvatic, E. F. Schwier, A.
Prokofiev, S. Paschen, H. Mitamura, T. Sakakibara and M. S. Grbic, J. Phys.: Condens. Matter 32 (2020) 245601(1-7).
16. †*Bulk quantum Hall effect of spin-valley coupled Dirac fermions in the polar antiferromagnet BaMnSb2: H. Sakai,
H. Fujimura, S. Sakuragi, M. Ochi, R. Kurihara, A. Miyake, M. Tokunaga, T. Kojima, D. Hashizume, T. Muro,
K. Kuroda, T. Kondo, T. Kida, M. Hagiwara, K. Kuroki, M. Kondo, K. Tsuruda, H. Murakawa and N. Hanasaki, Phys.
Rev. B 101 (2020) 081104(1-7).
17. High-field ultrasonic study of quadrupole ordering and crystal symmetry breaking in CeRhIn5: R. Kurihara, A. Miyake,
M. Tokunaga, Y. Hirose and R. Settai, Phys. Rev. B 101 (2020) 155125(1-8).
18. Magnetic phase diagram enriched by chemical substitution in a noncentrosymmetric helimagnet: T. Sato, Y. Araki,
A. Miyake, A. Nakao, N. Abe, M. Tokunaga, S. Kimura, Y. Tokunaga and T.-H. Arima, Phys. Rev. B 101 (2020)
054414(1-6).
19. †Magnetic structures and quadratic magnetoelectric effect in LiNiPO4 beyond 30 T: E. Fogh, T. Kihara, R. ToftPetersen, M. Bartkowiak, Y. Narumi, O. Prokhnenko, A. Miyake, M. Tokunaga, K. Oikawa, M. K. Sørensen, J. C.
Dyrnum, H. Grimmer, H. Nojiri and N. B. Christensen, Phys. Rev. B 101 (2020) 024403(1-12).
20. *Magnetotransport properties of tellurium under extreme conditions: K. Akiba, K. Kobayashi, T. C. Kobayashi,
R. Koezuka, A. Miyake, J. Gouchi, Y. Uwatoko and M. Tokunaga, Phys. Rev. B 101 (2020) 245111(1-6).
21. †High‐Mobility 2D Hole Gas at a SrTiO3 Interface: L. D. Anh, S. Kaneta, M. Tokunaga, M. Seki, H. Tabata, M. Tanaka
and S. Ohya, Adv. Mater. 32 (2020) 1906003(1-7).
22. Magnetic field induced antiferromagnetic cone structure in multiferroic BiFeO3: M. Matsuda, S. E. Dissanayake,
T. Hong, Y. Ozaki, T. Ito, M. Tokunaga, X. Z. Liu, M. Bartkowiak and O. Prokhnenko, Phys. Rev. Materials 4 (2020)
034412(1-6).

Y. Matsuda group
The high-magnetic-field x-ray diffraction study on the solid oxygen was performed with synchrotron x-rays at BL22XU of theSPring-8. A giant magnetostriction due to the strong spin-lattice coupling had been reported in alpha oxygen. It has been foundby our study that the change in the lattice constant is smaller than 10-4 even at high magnetic fields of up to 25 T, which is twoorders of magnitude smaller than that expected from the results of the previous report. Considering the energy balance between
the elastic energy and the magnetic energy, it seems to be reasonable having the absence of the giant magnetostriction. The firstorder alpha-theta magnetic-field-induced phase transition in oxygen around 120 T thus is expected to happen with a distinct
sharp change in the crystal lattice without gradual expansion at smaller magnetic fields. The magnetostriction in the deformed
Kagome spin system volborthite has been investigated in pulsed magnetic fields and a significant 1/3 plateau has been observedin the field variation of the striction. A comparison between the magnetic field dependences of the striction and magnetization
allows us to discuss the correlation function of spins. Non-polar magnetic compound Pb2MnO4 and a high-Tc cuprate LaSrCuO4
have also been investigated in pulsed magnetic fields of up to 60 T and 100 T, respecively.
1.

High magnetic field x-ray diffraction study of the α phase of solid oxygen: Absence of giant magnetostriction: Y. H.
Matsuda, A. Shimizu, A. Ikeda, T. Nomura, T. Yajima, T. Inami, K. Takahashi and T. C. Kobayashi, Phys. Rev. B 100(2019) 214105(1-7).
† Joint research with outside partners.

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193

2.

†*Magnetoelastic couplings in the deformed kagome quantum spin lattice of volborthite: A. Ikeda, S. Furukawa,

3.

†Metamagnetic transitions and magnetoelectric coupling in acentric and nonpolar Pb MnO : D. Chandrasekhar Kakarla,
2
4

O. Janson, Y. H. Matsuda, S. Takeyama, T. Yajima, Z. Hiroi and H. Ishikawa, Phys. Rev. B 99 (2019) 140412(R)(1-5).

H. C. Wu, D. J. Hsieh, P. J. Sun, G. J. Dai, J. -Y. Lin, J. L. Her, Y. H. Matsuda, L. Z. Deng, M. Gooch, C. W. Chu and
H. D. Yang, Phys. Rev. B 99 (2019) 195129(1-9).
4. ファイバーブラッググレーティングを用いた高速 100MHz ひずみ測定装置の構築と超強磁場中スピン格子物性の開拓 : 池田
暁彦 , 松田 康弘 , 固体物理 54 (2019) 147- 157.
5.

†*Pauli-limit upper critical field of high-temperature superconductor La1.84Sr0.16CuO4: D. Nakamura, T. Adachi,

6.

†The Temperature Dependence of the Magnetization Process of the Kondo Insulator YbB : Y. H. Matsuda, Y. Kakita
12

7.

†*Direct measurement of resistivity in destructive pulsed magnetic fields: Y. Kohama, F. Nabeshima, A. Maeda, A. Ikeda

K. Omori, Y. Koike and S. Takeyama, Sci Rep 9 (2019) 16949(1-8).
and F. Iga, Crystals 10 (2020) 26(1-7).

and Y. H. Matsuda, Review of Scientific Instruments 91 (2020) 033901(1-5).

Kohama group
We have investigated high-field properties in many different systems, such as CeRhIn5, AgVOAsO4, Co2V2O7, volborthite,
BaCo2V2O8, V5Se8, LiCuVO4, Pr2Ir2O7, and UIrGe. With newly developed measurement techniques, specific heat and magnetooptics, we could reveal the field-induced phenomena such as QCP, spin nematic state, and electronic nematic state. We also
have constructed a new type of capacitor bank for the generation of pulsed magnetic fields with the second order timescale.
1.

2.

*Thermodynamic Investigation of Metamagnetism in Pulsed High Magnetic Fields on Heavy Fermion Superconductor

UTe2: S. Imajo, Y. Kohama, A. Miyake, C. Dong, M. Tokunaga, J. Flouquet, K. Kindo and D. Aoki, J. Phys. Soc. Jpn. 88(2019) 083705(1-5).

†*Enhancement of the effective mass at high magnetic fields in CeRhIn : L. Jiao, M. Smidman, Y. Kohama, Z. S. Wang,
5

D. Graf, Z. F. Weng, Y. J. Zhang, A. Matsuo, E. D. Bauer, H. Lee, S. Kirchner, J. Singleton, K. Kindo, J. Wosnitza,
F. Steglich, J. D. Thompson and H. Q. Yuan, Phys. Rev. B 99 (2019) 045127(6).
3.

Field-induced double dome and Bose-Einstein condensation in the crossing quantum spin chain system AgVOAsO4:
F. Weickert, A. A. Aczel, M. B. Stone, V. Ovidiu Garlea, C. Dong, Y. Kohama, R. Movshovich, A. Demuer, N. Harison,
M. B. G. A. Steppke, M. Brando, H. Rosner and A. A. Tsirlin, Phys. Rev. B 100 (2019) 104422.

4.

*Successive electric-polarization switches in the S=1/2 skew chain Co V O induced by a high magnetic field:
2 2 7

R. Chen, J. F. Wang, Z. W. Ouyang, M. Tokunaga, A. Y. Luo, L. Lin, J. M. Liu, Y. Xiao, A. Miyake, Y. Kohama, C. L.
Lu, M. Yang, Z. C. Xia, K. Kindo and L. Li, Phys. Rev. B 100 (2019) 140403(1-5).
5.

Viscosity measurements in pulsed magnetic fields by using a quartz-crystal microbalance: T. Nomura, S. Zherlitsyn,
Y. Kohama and J. Wosnitza, Rev. Sci. Instrum. 90 (2019) 065101.

6.

*Quantum Critical Dynamics of Heisenberg-Ising Chain in a Longitudinal Field: Many-Body Strings versus Fractional

Excitations: Z. Wang, M. Schmidt, A. Loidl, J. Wu, H. Zou, W. Yang, C. Dong, Y. Kohama, K. Kindo, D. I. Gorbunov,
S. Niesen, O. Breuning, J. Engelmayer and T. Lorenz, Phys. Rev. Lett. 123 (2019) 067202.
7.

* カゴメ銅鉱物ボルボサイトにおける軌道転移とフラストレート磁性 : 広井 善二 , 石川 孟 , 小濱 芳允 , 固体物理 54 (2019)117-130.
8.

*Unconventional field-induced spin gap in an S = 1/2 chiral staggered chain: J. Liu, S. Kittaka, R. D. Johnson,

T. Lancaster, J. Singleton, T. Sakakibara, Y. Kohama, J. van Tol, A. Ardavan, B. H. Williams, S. J. Blundell, Z. E.
Manson, J. L. Manson and P. A. Goddard, Phys Rev Lett 122 (2019) 057207(1-6).
9.

*Multiple topological states in iron-based superconductors: P. Zhang, Z. Wang, X. Wu, K. Yaji, Y. Ishida, Y. Kohama,

G. Dai, Y. Sun, C. Bareille, K. Kuroda, T. Kondo, K. Okazaki, K. Kindo, X. Wang, C. Jin, J. Hu, R. Thomale,
K. Sumida, S. Wu, K. Miyamoto, T. Okuda, H. Ding, G. D. Gu, T. Tamegai, T. Kawakami, M. Sato and S. Shin, Nature
Phys 15 (2019) 41-48.
10. Shubnikov–de Haas oscillations in the three-dimensional Dirac fermion system Ca3PbO: Y. Obata, Y. Kohama,
S. Matsuishi and H. Hosono, Phys Rev B 99 (2019) 115133.
11. *Strain-induced spontaneous Hall effect in an epitaxial thin film of a Luttinger semimetal: T. Ohtsuki, Z. Tian, A. Endo,
M. Halim, S. Katsumoto, Y. Kohama, K. Kindo, M. Lippmaa and S. Nakatsuji, Proc. Natl. Acad. Sci. USA 116 (2019)* Joint research among groups within ISSP.

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8803-8808.
12. *Possible observation of quantum spin-nematic phase in a frustrated magnet: Y. Kohama, H. Ishikawa, A. Matsuo,
K. Kindo, N. Shannon and Z. Hiroi, Proc. Nat. Acad. Sci. U.S.A. 116 (2019) 10686-10690.
13. Magnetocaloric effect and spin-strain coupling in the spin-nematic state of LiCuVO4: M. Gen, T. Nomura, D. I.
Gorbunov, S. Yasin, P. T. Cong, C. Dong, Y. Kohama, E. L. Green, J. M. Law, M. S. Henriques, J. Wosnitza, A. A.
Zvyagin, V. O. Cheranovskii, R. K. Kremer and S. Zherlisyn, Phys. Rev. Research 1 (2019) 033065(1-8).
14. *Intrinsic 2D Ferromagnetism in V5Se8 Epitaxial thin films: M. Nakano, Y. Wang, S. Yoshida, H. Matsuoka, Y. Majima,
K. Ikeda, Y. Hirata, Y. Takeda, H. Wadati, Y. Kohama, Y. Ohigashi, M. Sakano, K. Ishizaka and Y. Iwasa, Nano Letter 19(2019) 8806-8810.
15. Electronic band structure of (111) SrRuO3 thin films: An angle-resolved photoemission spectroscopy study: H. Ryu,
Y. Ishida, B. Kim, J. R. Kim, W. J. Kim, Y. Kohama, S. Imajo, Z. Yang, W. Kyung, S. Hahn, B. Sohn, I. Song, M. Kim,
S. Huh, J. Jung, D. Kim, T. W. Noh, S. Das and C. Kim, Phys. Rev. B 102 (2020) 041102.
16. Magnetization process of the breathing pyrochlore magnet CuInCr4S8 in ultrahigh magnetic fields up to 150 T: M. Gen,Y. Okamato, M. Mori, K. Takenaka and Y. Kohama, Phys. Rev. B 101 (2020) 054434.
17. *Observation of in-plane magnetic field induced phase transitions in FeSe: J. M. Ok, C. I. Kwon, Y. Kohama, J. S. You,S. K. Park, J.-H. Kim, Y. J. Jo, E. S. Choi, K. Kindo, W. Kang, K.-S. Kim, E. G. Moon, A. Gurevich and J. S. Kim, Phys.
Rev. B 101 (2020) 224509.
18. *Extracting the Chiral Contribution to the Negative Longitudinal Magnetoresistance in Epitaxial Pr2Ir2O7 Thin Films:
T. Ohtsuki, Z. Tian, A. Endo, M. Halim, S. Katsumoto, Y. Kohama, K. Kindo, M. Lippmaa and S. Nakatsuji, JPS Conf.
Proc. 30 (2020) 011181(1-6).
19. †*Direct measurement of resistivity in destructive pulsed magnetic fields: Y. Kohama, F. Nabeshima, A. Maeda, A. Ikeda
and Y. H. Matsuda, Review of Scientific Instruments 91 (2020) 033901(1-5).
20. Angle dependence of Hc2 with a crossover between the orbital and paramagnetic limits: H. Matsuoka, M. Nakano,T. Shitaokoshi, Y. Wang, Y. Kashiwabara, S. Yoshida, Y. Kohama, T. Ouchi, K. Ishizaka, M. Kawasaki, T. Nojima andY. Iwasa, Phys. Rev. Research 2 (2020) 012064(R).
21. Van der Waals SnSe2(1−x)S2x Alloys: Composition-Dependent Bowing Coefficient and Electron–Phonon Interaction:
Z. R. Kudrynskyi, X. Wang, J. Sutcliffe, M. A. Bhuiyan, Y. Fu, Z. Yang, O. Makarovsky, L. Eaves, A. Solomon, V. T.
Maslyuk, Z. D. Kovalyuk, L. Zhang and A. Patanè, Advanced Functional Materials 30 (2020) 1908092.

Laser and Synchrotron Research Center
Kobayashi group
We are developing ultra-short pulse laser and its applications. In 2019, we have developed >20 GHz repetition rate mode-locked
oscillator, which would be useful for industrial and scientific applications.
1.

Kerr-lens mode locking above a 20  GHz repetition rate: S. Kimura, S. Tani and Y. Kobayashi, Optica 6 (2019) 532-533.

2.

Raman-assisted broadband mode-locked laser: S. Kimura, S. Tani and Y. Kobayashi, Sci Rep 9 (2019) 3738(1-6).

3.

Direct generation of femtosecond vortex beam from a Yb:KYW oscillator featuring a defect-spot mirror: S. Wang,
Z. Zhao, I. Ito and Y. Kobayashi, OSA Continuum 2 (2019) 523-530.

4.

Monolithic LiF or MgF2 lens-window-prism device for coherent 10.7  eV beam source with 1 MHz repetition rate:
Z. Zhao, K. Kuroda, A. Harasawa, T. Kondo, S. Shin and Y. Kobayashi, Chin. Opt. Lett. 17 (2019) 051406.

5.

†Study on nonthermal–thermal processing boundary in drilling of ceramics using ultrashort pulse laser system withvariable parameters over a wide range: A. Narazaki, H. Takada, D. Yoshitomi, K. Torizuka and Y. Kobayashi, Appl.
Phys. A 126 (2020) 252.
6.

Subgigahertz-resolution table-top spectrograph calibrated with a 4-GHz optical frequency comb: M. Endo, T. Sukegawa,A. Silva and Y. Kobayashi, J. Astron. Telesc. Instrum. Syst. 6 (2020) 1.

7.

カーレンズモード同期レーザーを用いた高繰り返し光周波数コムの開発 : 木村 祥太 , 谷 峻太郎 , 小林 洋平 , 光技術コンタ† Joint research with outside partners.

ISSP Activity Report 2019195

クト 57 (2019) 3-9.

8.

*Gerard A. Mourou 博士とチャープパルス増幅法 : 渡部 俊太郎 , 鍋川 康夫 , 板谷 治郎 , 小林 洋平 , 科学 82 巻 2 号(2019) 131-137.

Harada group
We have encouraged users the use of operando photoemission and soft X-ray emission measurements for battery materials andcatalysts. One of the outstanding works in 2019 is the elucidation of structure-activity correlations in a nickel manganese oxide,
which is an oxygen evolution reaction catalyst and was applied the operando soft X-ray emission analysis for the first time. In
2019 we have performed 14 collaborative works at BL07LSU HORNET end-station. Among them, six proposals were related
to the battery electrode, while four are solid-state physics. With a strong collaboration with a group at Stockholm University
in Sweden, we continue RIXS works on bulk liquid water and proved the existence of micro-inhomogeneity in liquid waterby a detailed analysis of excitation energy dependence. Using beamtimes for beamline tuning we continued feasibility studies
including test experiments with companies. Some of them are combined with the Grant-in-Aid for Scientific Research on
Innovative Area project named "Aquatic Functional Materials" starting from July.
1.

†Half-metallicity of Mn2VAl ferrimagnet revealed by resonant inelastic soft x-ray scattering in a magnetic field: R.

Y. Umetsu, H. Fujiwara, K. Nagai, Y. Nakatani, M. Kawada, A. Sekiyama, F. Kuroda, H. Fujii, T. Oguchi, Y. Harada,
J. Miyawaki and S. Suga, Phys. Rev. B 99 (2019) 134414(1-10).
2.

†Measurements of ultrafast dissociation in resonant inelastic x-ray scattering of water: K. Yamazoe, J. Miyawaki, H.

3.

†Operando soft X-ray emission spectroscopy of the Fe O anode to observe the conversion reaction: D. Asakura,
2 3

Niwa, A. Nilsson and Y. Harada, J. Chem. Phys. 150 (2019) 204201(1-7).

Y. Nanba, M. Okubo, H. Niwa, H. Kiuchi, J. Miyawaki, M. Oshima, E. Hosono and Y. Harada, Phys. Chem. Chem.
Phys. 21 (2019) 26351-26357.
4.

†Mn 2p resonant X-ray emission clarifies the redox reaction and charge-transfer effects in LiMn O : D. Asakura,
2 4

5.

†Elucidation of Structure–Activity Correlations in a Nickel Manganese Oxide Oxygen Evolution Reaction Catalyst by

Y. Nanba, E. Hosono, M. Okubo, H. Niwa, H. Kiuchi, J. Miyawaki and Y. Harada, Phys. Chem. Chem. Phys. 21 (2019)18363-18369.

Operando Ni L-Edge X-ray Absorption Spectroscopy and 2p3d Resonant Inelastic X-ray Scattering: M. A. Samarai,
A. W. Hahn, A. B. Askari, Y.-T. Cui, K. Yamazoe, J. Miyawaki, Y. Harada, O. Rüdiger and S. DeBeer, ACS Appl. Mater.
Interfaces 11 (2019) 38595-38605.
6.

†Operando measurement of single crystalline Li Ti O
4 5 12 with octahedral-like morphology by microscopic X-ray

photoelectron spectroscopy: K. Akada, T. Sudayama, D. Asakura, H. Kitaura, N. Nagamura, K. Horiba, M. Oshima,
E. Hosono and Y. Harada, Journal of Electron Spectroscopy and Related Phenomena 233 (2019) 64-68.
7.

†Microscopic photoelectron analysis of single crystalline LiCoO

8.

†Do X-ray spectroscopies provide evidence for continuous distribution models of water at ambient conditions?: L. G. M.

9.

*Direct Evidence of Interfacial Hydrogen Bonding in Proton-Electron Concerted 2D Organic Bilayer on Au Substrate:

2 particles during the charge-discharge in an all solidstate lithium ion battery: K. Akada, T. Sudayama, D. Asakura, H. Kitaura, N. Nagamura, K. Horiba, M. Oshima,
E. Hosono and Y. Harada, Sci Rep 9 (2019) 12452(1-7).

Pettersson, Y. Harada and A. Nilsson, Proc Natl Acad Sci USA 116 (2019) 17156-17157.

S. Yamamoto, H. S. Kato, A. Ueda, S. Yoshimoto, Y. Hirata, J. Miyawaki, K. Yamamoto, Y. Harada, H. Wadati, H. Mori,J. Yoshinobu and I. Matsuda, e-J. Surf. Sci. Nanotechnol. 17 (2019) 49-55.

I. Matsuda group
In 2019, varieties of surface chemistry were revealed by joint-researches of near-ambient pressure XPS at SPring-8 BL07LSU.
The laboratory has worked on developing advanced experimental techniques for the next-generation synchrotron radiation
facility. Especially, a new light source of the segmented undulator for extensive polarization controls is designed. In materialscience, carrier dynamics of the atomic layer system, such as quasi-crystalline bilayer graphene, are revealed by time-resolved
photoemission spectroscopy.
1.

†*Photoinduced valence dynamics in EuNi (Si2
0.21Ge0.79)2 studied via time-resolved x-ray absorption spectroscopy:

Y. Yokoyama, K. Kawakami, Y. Hirata, K. Takubo, K. Yamamoto, K. Abe, A. Mitsuda, H. Wada, T. Uozumi,
S. Yamamoto, I. Matsuda, S. Kimura, K. Mimura and H. Wadati, Phys. Rev. B 100 (2019) 115123(1-6).
2.

*Symmetry-breaking and spin-blockage effects on carrier dynamics in single-layer tungsten diselenide: R.-Y. Liu,
* Joint research among groups within ISSP.

196

ISSP Activity Report 2019

M.-K. Lin, P. Chen, T. Suzuki, P. C. J. Clark, N. K. Lewis, C. Cacho, E. Springate, C.-S. Chang, K. Okazaki, W. Flavell,
I. Matsuda and T.-C. Chiang, Phys. Rev. B 100 (2019) 214309.
3.

Superstructure-Induced Splitting of Dirac Cones in Silicene: B. Feng, H. Zhou, Y. Feng, H. Liu, S. He, I. Matsuda,
L. Chen, E. F. Schwier, K. Shimada, S. Meng and K. Wu, Phys. Rev. Lett. 122 (2019) 196801(1-6).

4.

時間分解軟 X 線光電子分光による電子状態の動的観察 : 松田 巌 , 応用物理 88 (2019) 716-719.

5.

偏光変調型軟 X 線を用いた複素誘電率の直接測定 : 久保田 雄也 , 赤井 久純 , 平田 靖透 , 松田 巌 , 日本物理学会誌 74(2019) 646.
6.

*Hydrogen adsorption and absorption on a Pd-Ag alloy surface studied using in-situ X-ray photoelectron spectroscopy

under ultrahigh vacuum and ambient pressure: J. Tang, S. Yamamoto, T. Koitaya, Y. Yoshikura, K. Mukai, S. Yoshimoto,
I. Matsuda and J. Yoshinobu, Appl. Surf. Sci. 463 (2019) 1161-1167.
7.

SACLA による軟 X 線非線形光学現象の開拓 : 山本 真吾 , 松田 巌 , 放射光 32 (2019) 307 (7 pages).

8.

†Enhanced Photoresponsivity of Fullerene in the Presence of Phthalocyanine: A Time-Resolved X-ray Photoelectron

Spectroscopy Study of Phthalocyanine/C60/TiO2 (110): K. Ozawa, S. Yamamoto, M. D’angelo, Y. Natsui, N. Terashima,
K. Mase and I. Matsuda, J. Phys. Chem. C 123 (2019) 4388-4395.
9.

†*Reversible low-temperature redox activity and selective oxidation catalysis derived from the concerted activationof multiple metal species on Cr and Rh-incorporated ceria catalysts: S. Ikemoto, X. Huang, S. Muratsugu, S. Nagase,
T. Koitaya, H. Matsui, G.-I. Yokota, T. Sudoh, A. Hashimoto, Y. Tan, S. Yamamoto, J. Tang, I. Matsuda, J. Yoshinobu,
T. Yokoyama, S. Kusaka, R. Matsuda and M. Tada, Phys. Chem. Chem. Phys. 21 (2019) 20868.
10. *Ultrafast Unbalanced Electron Distributions in Quasicrystalline 30° Twisted Bilayer Graphene: T. Suzuki, T. Iimori,
S. J. Ahn, Y. Zhao, M. Watanabe, J. Xu, M. Fujisawa, T. Kanai, N. Ishii, J. Itatani, K. Suwa, H. Fukidome, S. Tanaka,
J. R. Ahn, K. Okazaki, S. Shin, F. Komori and I. Matsuda, ACS Nano 13 (2019) 11981.
11. Electronic structure of a monoatomic Cu2Si layer on a Si(111) substrate: M. Cameau, R. Yukawa, C. -H. Chen,
A. Huang, S. Ito, R. Ishibiki, K. Horiba, Y. Obata, T. Kondo, H. Kumigashira, H. -T. Jeng, M. D'angelo and I. Matsuda,
Phys. Rev. Materials 3 (2019) 044004-1.-5.
12. Semimetallicity of free-standing hydrogenated monolayer boron from MgB2: I. Tateishi, N. T. Cuong, C. A. S. Moura,
M. Cameau, R. Ishibiki, A. Fujino, S. Okada, A. Yamamoto, M. Araki, S. Ito, S. Yamamoto, M. Niibe, T. Tokushima,
D. E. Weibel, T. Kondo, M. Ogata and I. Matsuda, Phys. Rev. Materials 3 (2019) 024004(1-8).
13. *Mass transport in the PdCu phase structures during hydrogen adsorption and absorption studied by XPS underhydrogen atmosphere: J. Tang, S. Yamamoto, T. Koitaya, A. Yoshigoe, T. Tokunaga, K. Mukai, I. Matsuda and J. Yoshinobu, Applied Surface Science 480 (2019) 419-426.
14. *CO2 Activation and Reaction on Zn-Deposited Cu Surfaces Studied by Ambient-Pressure X-ray Photoelectron
Spectroscopy: T. Koitaya, S. Yamamoto, Y. Shiozawa, Y. Yoshikura, M. Hasegawa, J. Tang, K. Takeuchi, K. Mukai,
S. Yoshimoto, I. Matsuda and J. Yoshinobu, ACS Catal. 9 (2019) 4539-4550.
15. *Direct Evidence of Interfacial Hydrogen Bonding in Proton-Electron Concerted 2D Organic Bilayer on Au Substrate:
S. Yamamoto, H. S. Kato, A. Ueda, S. Yoshimoto, Y. Hirata, J. Miyawaki, K. Yamamoto, Y. Harada, H. Wadati, H. Mori,J. Yoshinobu and I. Matsuda, e-J. Surf. Sci. Nanotechnol. 17 (2019) 49-55.
16. Segmented Undulator for Extensive Polarization Controls in ≤1 nm-rad Emittance Rings: I. Matsuda, S. Yamamoto,J. Miyawaki, T. Abukawa and T. Tanaka, e-J. Surf. Sci. Nanotechnol. 17 (2019) 41-48.
17. Photoinduced hydrogen release from hydrogen boride sheets: R. Kawamura, N. T. Cuong, T. Fujita, R. Ishibiki,
T. Hirabayashi, A. Yamaguchi, I. Matsuda, S. Okada, T. Kondo and M. Miyauchi, Nature Commun. 10 (2019) 4880 (10pages).
18. †A Surface Science Approach to Unveiling TiO2 Photocatalytic Mechanism: Correlation between Photocatalytic
Activity and Carrier Lifetime: K. Ozawa, S. Yamamoto, K. Mase and I. Matsuda, e-J. Surf. Science. Nanotechnol. 17(2019) 130-147.
19. Two-dimensional conducting layer on SrTiO3 surface induced by hydrogenation: Y. Takeuchi, R. Hobara, R. Akiyama,
A. Takayama, S. Ichinokura, R. Yukawa, I. Matsuda and S. Hasegawa, Phys. Rev. B 101 (2020) 085422(1-6).
20. *Element-selectively tracking ultrafast demagnetization process in Co/Pt multilayer thin films by the resonant magnetooptical Kerr effect: K. Yamamoto, S. E. Moussaoui, Y. Hirata, S. Yamamoto, Y. Kubota, S. Owada, M. Yabashi, T. Seki,
K. Takanashi, I. Matsuda and H. Wadati, Appl. Phys. Lett. 116 (2020) 172406(1-5).

† Joint research with outside partners.

ISSP Activity Report 2019197

21. *A computational examination of the electric-field-induced proton transfer along the interface hydrogen bond between
proton donating and accepting self-assembled monolayers: Y. Kanematsu, H. S. Kato, S. Yoshimoto, A. Ueda,
S. Yamamoto, H. Mori, J. Yoshinobu, I. Matsuda and M. Tachikawa, Chem. Phys. Lett. 741 (2020) 137091.
22. *Edge-state correlation accelerates metal-insulator transition in topological semimetal nanofilms: S. Ito, M. Arita,
J. Haruyama, B. Feng, W. -C. Chen, H. Namatame, M. Taniguchi, C. -M. Cheng, G. Bian, S. -J. Tang, T. -C. Chiang,
O. Sugino, F. Komori and I. Matsuda, Science Advances 6 (2020) eaaz5015 (7 pages).
23. Geometrical Frustration of B-H Bonds in Layered Hydrogen Borides Accessible by Soft Chemistry: S. Tominaka,
R. Ishibiki, A. Fujino, K. Kawakami, K. Ohara, I. Matsuda, H. Hosono and T. Kondo, Chem 6 (2020) 406-418.
24. †*Surface Chemistry of Carbon Dioxide on Copper Model Catalysts Studied by Ambient-Pressure X-ray Photoelectron
Spectroscopy: T. Koitaya, S. Yamamoto, I. Matsuda and J. Yoshinobu, e-J. Surf. Sci. Nanotechnol. 17 (2019) 169.
25. Monatomic Two-Dimensional Layers: Modern Experimental Approaches for Structure, Properties, and Industrial Use:I. M. ed., (Elsevier, Amsterdam, Netherland, 2019).

Itatani group
We carried out transient soft-x-ray spectroscopy using isolated attosecond pulses in the water window (photon energy spansfrom 280 to 540 eV). Broadband isolated attosecond pulses are now routinely generated with an accurate control of carrierenvelope phases of the driver laser as well as a precise feedback of the pump and probe path length, which resulted in ~50
attosecond pump-probe precision. We measured absorption spectra for NO molecules that were irradiated by intense IR fields at
the nitrogen K edge around 400 eV. We time-resolved the generation process of NO+ ions via field ionization, molecular vibration of NO+ ions, and molecular orientation of NO molecules, all of these dynamics occurred in the hierarchal manner on thetime scales from attoseconds to subpicoseconds. Indeed this experiment is the one at the highest photon energy in attosecond
soft-X-ray spectroscopy. We also developed intense MIR sources at 3.5 μm, and applied these sources to several experiments
on solid samples. In the case of gold-coated grating, we discovered highly directional resonant-like photoemission, which arosefrom the generation of propagating surface plasmon that enhanced the localized near fields at the tip of the grating structure.
High harmonic generation in a hybrid organic-inorganic perovskite thin film was firstly observed. Sub-cycle spectroscopy for
MIR field-induced dynamics for proton-mediated ferroelectricity was carried out, and we demonstrated that the ferroelectricity
was controlled by direct phonon excitation. The collaboration with time-resolved ARPES groups continued, and we observed
intriguing photo-induced phenomena in twisted bilayer graphene and FeSe.
1.

†Ultrafast Control of Ferroelectricity with Dynamical Repositioning of Protons in a Supramolecular Cocrystal Studied

by Femtosecond Nonlinear Spectroscopy: T. Umanodan, K. Kaneshima, K. Takeuchi, N. Ishii, J. Itatani, H. Hirori,
Y. Sanari, K. Tanaka, Y. Kanemitsu, T. Ishikawa, S.-Y. Koshihara, S. Horiuchi and Y. Okimoto, J. Phys. Soc. Jpn. 88(2019) 013705.
2.

位相安定な中赤外光源とサブサイクル分光 : 金島 圭佑 , 石井 順久 , 竹内 健悟 , 板谷 治郎 , 固体物理 54 (2019)165-172.

3.

Optical parametric amplification of carrier-envelope phase-stabilized mid-infrared pulses generated by intra-pulse
difference frequency generation: N. Ishii, P. Xia, T. Kanai and J. Itatani, Opt. Express 27 (2019) 11447.

4.

*Ultrafast Unbalanced Electron Distributions in Quasicrystalline 30° Twisted Bilayer Graphene: T. Suzuki, T. Iimori,

S. J. Ahn, Y. Zhao, M. Watanabe, J. Xu, M. Fujisawa, T. Kanai, N. Ishii, J. Itatani, K. Suwa, H. Fukidome, S. Tanaka,
J. R. Ahn, K. Okazaki, S. Shin, F. Komori and I. Matsuda, ACS Nano 13 (2019) 11981.
5.

Real-time observation of electronic, vibrational, and rotational dynamics in nitric oxide with attosecond soft x-ray
pulses at 400 eV: N. Saito, H. Sannohe, N. Ishii, T. Kanai, N. Kosugi, Y. Wu, A. Chew, S. Han, Z. Chang and J. Itatani,
Optica 6 (2019) 1542.

6.

†High-order harmonic generation from hybrid organic–inorganic perovskite thin films: H. Hirori, P. Xia, Y. Shinohara,

T. Otobe, Y. Sanari, H. Tahara, N. Ishii, J. Itatani, K. L. Ishikawa, T. Aharen, M. Ozaki, A. Wakamiya and Y. Kanemitsu,
APL Materials 7 (2019) 041107.
7.

*Photoinduced possible superconducting state with long-lived disproportionate band filling in FeSe: T. Suzuki,

T. Someya, T. Hashimoto, S. Michimae, M. Watanabe, M. Fujisawa, T. Kanai, N. Ishii, J. Itatani, S. Kasahara,
Y. Matsuda, T. Shibauchi, K. Okazaki and S. Shin, Commun. Phys. 2 (2019) 115.
8.

Resonant-Like Field Enhancement by Nanoscale Grating-Coupled Propagating Surface Plasmonics and Localized
Surface Plasmons in the Mid-Infrared Range: Implications for Ultrafast Plasmonic Electron Sources: T. Mizuno,
K. Takeuchi, K. Kaneshima, N. Ishii, T. Kanai and J. Itatani, Applied Nano Materials 2 (2019) 7067-7073.

9.

*Efficient Terahertz Harmonic Generation with Coherent Acceleration of Electrons in the Dirac Semimetal Cd As :3 2
* Joint research among groups within ISSP.

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ISSP Activity Report 2019

B. Cheng, N. Kanda, T. N. Ikeda, T. Matsuda, P. Xia, T. Schumann, S. Stemmer, J. Itatani, N. P. Armitage and R. Matsunaga, Phys. Rev. Lett. 124 (2020) 117402.
10. 中赤外光パルスを用いた固体高次高調波発生とその偏光特性 : 石井 順久 , 金島 圭佑 , 夏 沛宇 , 斎藤 成之 , 金井 輝人 ,板谷 治郎 , レーザー研究 49 (2020) 168-173.
11. *Gerard A. Mourou 博士とチャープパルス増幅法 : 渡部 俊太郎 , 鍋川 康夫 , 板谷 治郎 , 小林 洋平 , 科学 82 巻 2 号(2019) 131-137.

Kondo group
We use angle-resolved photoemission spectroscopy (ARPES) with ultrahigh energy resolution. The main findings in 2019 was a
weak topological insulator state in β-Bi4I4.
1.

*A weak topological insulator state in quasi-one-dimensional bismuth iodide: R. Noguchi, T. Takahashi, K. Kuroda,

M. Ochi, T. Shirasawa, M. Sakano, C. Bareille, M. Nakayama, M. D. Watson, K. Yaji, A. Harasawa, H. Iwasawa,
P. Dudin, T. K. Kim, M. Hoesch, V. Kandyba, A. Giampietri, A. Barinov, S. Shin, R. Arita, T. Sasagawa and T. Kondo,
Nature 566 (2019) 518.
2.

*Low-energy electron-mode couplings in the surface bands of Sr RuO revealed by laser-based angle-resolved photo2
4

emission spectroscopy: S. Akebi, T. Kondo, M. Nakayama, K. Kuroda, S. Kunisada, H. Taniguchi, Y. Maeno and
S. Shin, Physical Review B 99 (2019) 081108(R).
3.

Strongly anisotropic high-temperature Fermi surface of the Kondo semimetal CeNiSn revealed by angle-resolved
photoemission spectroscopy: C. Bareille, T. -S. Nam, T. Takabatake, K. Kuroda, T. Yajima, M. Nakayama, S. Kunisada,
S. Akebi, M. Sakano, S. Sakuragi, R. Noguchi, B. I. Min, S. Shin and T. Kondo, Physical Review B 100 (2019) 045133.

4.

*Multiple topological states in iron-based superconductors: P. Zhang, Z. Wang, X. Wu, K. Yaji, Y. Ishida, Y. Kohama,

G. Dai, Y. Sun, C. Bareille, K. Kuroda, T. Kondo, K. Okazaki, K. Kindo, X. Wang, C. Jin, J. Hu, R. Thomale,
K. Sumida, S. Wu, K. Miyamoto, T. Okuda, H. Ding, G. D. Gu, T. Tamegai, T. Kawakami, M. Sato and S. Shin, Nature
Phys 15 (2019) 41-48.
5.

Density Wave Probes Cuprate Quantum Phase Transition: T. A. Webb, M. C. Boyer, Y. Yin, D. Chowdhury, Y. He,
T. Kondo, T. Takeuchi, H. Ikuta, E. W. Hudson, J. E. Hoffman and M. H. Hamidian, Physical Review X 9 (2019)021021.

6.

Dirac Surface States in Intrinsic Magnetic Topological Insulators EuSn2As2 and MnBi2nTe3n+1: H. Li, S.-Y. Gao, S.-F.
Duan, Y.-F. Xu, K.-J. Zhu, S.-J. Tian, J.-C. Gao, W.-H. Fan, Z.-C. Rao, J.-R. Huang, J.-J. Li, D.-Y. Yan, Z.-T. Liu, W.-L.
Liu, Y.-B. Huang, Y.-L. Li, Y. Liu, G.-B. Zhang, P. Zhang, T. Kondo, S. Shin, H.-C. Lei, Y.-G. Shi, W.-T. Zhang, H.-M.
Weng, T. Qian and H. Ding, Physical Review X 9 (2019) 041039.

7.

Band structure of overdoped cuprate superconductors: Density functional theory matching experiments: K. P. Kramer,
M. Horio, S. S. Tsirkin, Y. Sassa, K. Hauser, C. E. Matt, D. Sutter, A. Chikina, N. B. M. Schröter, J. A. Krieger,
T. Schmitt, V. N. Strocov, N. C. Plumb, M. Shi, S. Pyon, T. Takayama, H. Takagi, T. Adachi, T. Ohgi, T. Kawamata,Y. Koike, T. Kondo, O. J. Lipscombe, S. M. Hayden, M. Ishikado, H. Eisaki, T. Neupert and J. Chang, Physical Review
B 99 9 (2019) 224509.

8.

†*Bulk quantum Hall effect of spin-valley coupled Dirac fermions in the polar antiferromagnet BaMnSb : H. Sakai,
2

H. Fujimura, S. Sakuragi, M. Ochi, R. Kurihara, A. Miyake, M. Tokunaga, T. Kojima, D. Hashizume, T. Muro,
K. Kuroda, T. Kondo, T. Kida, M. Hagiwara, K. Kuroki, M. Kondo, K. Tsuruda, H. Murakawa and N. Hanasaki, Phys.
Rev. B 101 (2020) 081104(1-7).
9.

Three-dimensional electronic structure in ferromagnetic Fe3Sn2 with breathing kagome bilayers: H. Tanaka, Y. Fujisawa,
K. Kuroda, R. Noguchi, S. Sakuragi, C. Bareille, B. Smith, C. Cacho, S. W. Jung, T. Muro, Y. Okada and T. Kondo,
Phys. Rev. B 101 (2020) 161114.

10. *Radial Spin Texture in Elemental Tellurium with Chiral Crystal Structure: M. Sakano, M. Hirayama, T. Takahashi,
S. Akebi, M. Nakayama, K. Kuroda, K. Taguchi, T. Yoshikawa, K. Miyamoto, T. Okuda, K. Ono, H. Kumigashira,T. Ideue, Y. Iwasa, N. Mitsuishi, K. Ishizaka, S. Shin, T. Miyake, S. Murakami, T. Sasagawa and T. Kondo, Phys. Rev.
Lett. 124 (2020) 136404.

Matsunaga group
We have investigated light-matter interactions and light-induced nonequilibrium phenomena in solids by utilizing terahertz(THz) pulse. With developing polarization-resolved THz time-domain spectroscopy system, we observed a large anomalous† Joint research with outside partners.

ISSP Activity Report 2019199

Hall effect in a Weyl antiferromagnet Mn3Sn film at room temperature, realizing the noncontact ultrafast readout of the antiferromagnetic order in the picosecond timescale. In addition, with developing intense THz pulse generation technique, we discovered extremely-efficient THz high-harmonic generation in a Dirac semimetal Cd3As2 thin film at room temperature. By timeresolved THz spectroscopy, we also demonstrated that the mechanism of THz harmonic generation is the coherent accelerationof Dirac electrons in momentum space for the first time as theoretically anticipated over the decade.
1.

Light-induced nonequilibrium response of the superconducting cuprate La2−xSrxCuO4: H. Niwa, N. Yoshikawa,
K. Tomari, R. Matsunaga, D. Song, H. Eisaki and R. Shimano, Phys. Rev. B 100 (2019) 104507.

2.

Infrared Activation of the Higgs Mode by Supercurrent Injection in Superconducting NbN: S. Nakamura, Y. Iida,
Y. Murotani, R. Matsunaga, H. Terai and R. Shimano, Phys. Rev. Lett. 122 (2019) 257001.

3.

*Efficient Terahertz Harmonic Generation with Coherent Acceleration of Electrons in the Dirac Semimetal Cd As :3 2
B. Cheng, N. Kanda, T. N. Ikeda, T. Matsuda, P. Xia, T. Schumann, S. Stemmer, J. Itatani, N. P. Armitage and R. Matsunaga, Phys. Rev. Lett. 124 (2020) 117402.

4.

*Room-temperature terahertz anomalous Hall effect in Weyl antiferromagnet Mn Sn thin films: T. Matsuda, N. Kanda,
3

T. Higo, N. P. Armitage, S. Nakatsuji and R. Matsunaga, Nat Commun 11 (2020) 909.

Okazaki group
We have investigated superconducting-gap structures of unconventional superconductors by a low-temperature and highresolution laser ARPES apparatus and transient electronic structures in photo-excited non-equilibrium states by a time-resolved
ARPES apparatus using EUV and SX lasers. In the academic year 2019, we have revealed the detailed superconducting gap
structures of SrFe2 (As0.65P0.35)2 and Pr1.3-xLa0.7CexCuO4 by high-resolution laser ARPES. In addition, we have investigated thenon-equilibrium electronic states of FeSe by HHG laser time-resolved ARPES, and found the possible superconducting state isrealized in this material.
1.

†* d-wave

2.

*Symmetry-breaking and spin-blockage effects on carrier dynamics in single-layer tungsten diselenide: R.-Y. Liu,

superconducting gap observed in the protect-annealed electron-doped cuprate superconductors
Pr1.3-xLa0.7CexCuO4: M. Horio, K. Koshiishi, S. Nakata, K. Hagiwara, Y. Ota, K. Okazaki, S. Shin, S. Ideta, K. Tanaka,
A. Takahashi, T. Ohgi, T. Adachi, Y. Koike and A. Fujimori, Phys. Rev. B 100 (2019) 054517.
M.-K. Lin, P. Chen, T. Suzuki, P. C. J. Clark, N. K. Lewis, C. Cacho, E. Springate, C.-S. Chang, K. Okazaki, W. Flavell,
I. Matsuda and T.-C. Chiang, Phys. Rev. B 100 (2019) 214309.

3.

*Ultrafast Unbalanced Electron Distributions in Quasicrystalline 30° Twisted Bilayer Graphene: T. Suzuki, T. Iimori,

S. J. Ahn, Y. Zhao, M. Watanabe, J. Xu, M. Fujisawa, T. Kanai, N. Ishii, J. Itatani, K. Suwa, H. Fukidome, S. Tanaka,
J. R. Ahn, K. Okazaki, S. Shin, F. Komori and I. Matsuda, ACS Nano 13 (2019) 11981.
4.

†*Band-dependent superconducting gap in SrFe (As20.65P0.35)2 studied by angle-resolved photoemission spectroscopy:

H. Suzuki, T. Kobayashi, S. Miyasaka, K. Okazaki, T. Yoshida, M. Horio, L. C. C. Ambolode, Y. Ota, H. Yamamoto,S. Shin, M. Hashimoto, D. H. Lu, Z. -X. Shen, S. Tajima and A. Fujimori, Sci Rep 9 (2019) 16418.
5.

*Multiple topological states in iron-based superconductors: P. Zhang, Z. Wang, X. Wu, K. Yaji, Y. Ishida, Y. Kohama,

G. Dai, Y. Sun, C. Bareille, K. Kuroda, T. Kondo, K. Okazaki, K. Kindo, X. Wang, C. Jin, J. Hu, R. Thomale,
K. Sumida, S. Wu, K. Miyamoto, T. Okuda, H. Ding, G. D. Gu, T. Tamegai, T. Kawakami, M. Sato and S. Shin, Nature
Phys 15 (2019) 41-48.
6.

*Photoinduced possible superconducting state with long-lived disproportionate band filling in FeSe: T. Suzuki,

T. Someya, T. Hashimoto, S. Michimae, M. Watanabe, M. Fujisawa, T. Kanai, N. Ishii, J. Itatani, S. Kasahara, Y.
Matsuda, T. Shibauchi, K. Okazaki and S. Shin, Commun. Phys. 2 (2019) 115.

* Joint research among groups within ISSP.

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