2021Ⓒ 2022 The Institute for Solid State Physics, The University of Tokyo

Activity Report2021

Preface					

1Research Highlights		

2 - 39

Joint Research Highlights

40 - 53

Progress of Facilities		

54 - 61

Conferences and Workshops

62 - 67

Publications		

68 - 103

Subjects of Joint Research

104 - 160

Preface

We would like to offer the readers the scientific activity report of theInstitute for Solid State Physics (ISSP) for the Japanese FY 2021.
ISSP was established in 1957 as a joint usage/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 usage/research.
The first and second parts of the report, Research Highlights/Joint
Research Highlights, exhibit experimental and theoretical achievements incondensed matter physics and materials science. In 2021, the number ofadapted joint usage/research is 1,803 and the total number of researchers is6,489, whose number was recovered even in the COVID-19 pandemic.
The third part includes the reports on progress of facilities in 2021 asfollows. (1) In International MegaGauss Science Laboratory, the pulse magnets can generate up to 86 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 high magnetic field. (2) In the Supercomputer Center (SCC),
the System C is scheduled to be settled in June 2022. In Center of Computational Materials Science, the website"MateriApps" for information on application software in computational science has been constructed to support
community members. (3) In Neutron Science Laboratory, it is really good news that JRR-3 has restarted in February
2021 after long shutdown and the normal General User Program came back from July 2021. The technical progressof High Resolution Chopper (HRC) spectrometer has been proceeded under high pressure and low temperatureenvironment in cooperation with KEK. (4) The Laser and Synchrotron Research (LASOR) center has 10 groups
in 2021 where ISSP has integrated the two streams, namely the extreme lasers and synchrotron radiations, into thecommon platform. In Synchrotron Radiation Laboratory, operand spectroscopy is available by using lasers at Harimabranch. (5) The Laboratory of Quantum Material Nanostructures (Q-NanoLab) has opened on March 10, 2022 as a
joint facility. The Q-NanoLab provides a common infrastructure for investigating nanostructures, non-equilibrium
phenomena, or device operations of newly synthesized materials and novel quantum structures.
In the following parts, seven reports of international and domestic online and hybrid conferences and workshops
owing to COVID-19 pandemic, subjects of joint research, and list of publications have been presented.
For the development of material science studying the various physical properties of matters, it is essential tofurther expand the research area and promote the diversity of the researchers. The ISSP Workshop entitled "ISSPWOMEN'S WEEK 2021" was held to further promote the activities of female researchers who still remain a minority
in the field of science and engineering research. We invited female researchers who are active on the cutting edge in awide range of fields of material science, ranging from leading professors representing each research field, who serve
as a role model for female students, to up-and-coming young female researchers. Moreover, special lectures on theefforts of the institutions to promote diversity and a panel discus­sion with invited speakers were given.
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, 2022
MORI Hatsumi
Director of the Institute for Solid State Physics
The University of Tokyo

ISSP Activity Report 2021

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Research Highlights
Simplest Model for Doped Conducting
Polymer: Single-Crystalline Dimer
Radical Cation Salts
Mori and Ozaki Groups
Conjugated polymers are essential materials in organic
electronic device technologies owing to their mechanicalflexibility, lightness, and solution processability. Amongthem, poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS, Fig. 1a), a polyion complex in which
the positively charged PEDOT is stabilized by PSS anions,is one of the most widely used conducting polymers. The
high conductivity (up to > 4000 S cm−1), transparency,
and solution processability have increasingly led them to awide range of applications, for example, as a hole injection
layer in organic photovoltaic (OPV) devices. Nevertheless,in-depth structural information of PEDOT:PSS is sorely
lacking, which has severely limited the understanding of
the structure-based conducting mechanism requisite for
performance improvement; this also hampers molecular
design strategies of next-generation electric conductors.
One promising approach to elucidate the structure-property
relationships of doped PEDOT is to utilize discrete oligoEDOT∙A models (A: counter anion, Fig. 1b). Recently, wedeveloped oligo-EDOT∙A models with less bulky methyl­
thio (MeS) groups (i.e., 2MeS-2EDOT∙A; A = BF4−, ClO4−,
PF6−) that facilitate the growth of X-ray quality single
crystals with adequately tight π-stacking. Combination of
the atomic-level structural analyses and physical property
measurements of the discrete oligomer systems revealed
strong π–π interactions along the stacking direction as theorigin of the excellent conductivity of doped PEDOT.
Single crystals of charge-transfer salts 2MeS-2EDOT∙A
were then synthesized by the electrochemical oxidation of
2MeS-2EDOT in the presence of n-Bu4N∙A electrolyte. The

Fig. 1. Oligomer approach for doped PEDOT demonstrated in thisstudy. (a) Structure of poly(3,4-ethylenedioxythiophene):poly(styren
esulfonate) (PEDOT:PSS). (b) Structure of discrete oligomer models:oligo-3,4-ethylenedioxythiophene (oligo-EDOT)∙A (A = BF4, ClO4,
PF6).

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ISSP Activity Report 2021

X-ray structural analyses at 293 K revealed a 1:1 composition of oxidized 2MeS-2EDOT (i.e., monovalent radical
cation 2MeS-2EDOT+) and counter anion A located in thevoids of 2MeS-2EDOT+ donors (Figs. 2a, b). In each structure of 2MeS-2EDOT∙A, the donors were tightly stacked
in a one-dimensional (1D) configuration with a head-to-tailpattern and with the donors rotated 1–3° at the centroid alongthe π-stacking axis. Interestingly, the donors were uniformly
π-stacked in the range 3.46–3.48 Å, consistent with thosepredicted for PEDOT:PSS (3.43–3.51 Å).
We investigated the band structures based on the crystal
structures using first-principles density functional theory(DFT) calculations (OpenMX software). Concerning the1+ electronic charge of the molecule and its crystallographycally uniform π-stacking structure, the HOCO band
exhibited a half-filled state with no energy gaps at the Fermi
level (Fig. 2c), suggesting a metallic electronic state. Theband width W of the HOCO band was determined to be as
high as 0.998 eV (Fig. 2c). This result indicates the exclu­
sively strong molecular interaction (W ≈ 1 eV) found in
2MeS-2EDOT∙A. The geometric and electronic structures of
π-stacking are the most critical factors for the high conductivity of doped PEDOT.
We then measured the electrical resistivity (ρ) of
2MeS-2EDOT∙A. The ρ along the long axis directionof the crystal shape (the donor stacking a-axis) of
2MeS-2EDOT∙BF 4 was determined as 2.8 × 10 2 Ω cm
(Fig. 2d) at room temperature. From an Arrhenius plot,
the activation energy was determined as 177.2 ± 0.9 meV,
exhibiting almost no T-dependence. Considering the metallic

Fig. 2 Structures of 2MeS-2EDOT∙BF4 along (a) the a-axis and (b)the b-axis. The orange polyhedra represent the disordered BF4 anions.
(c) Calculated band structure of 2MeS-2EDOT∙BF4 and (d) ρ (resistivity) – Temperture−1 plots of 2MeS-2EDOT∙A (A = BF4, ClO4, PF6)
Inset: a picture for the single crystal of 2MeS-2EDOT∙BF4 used in themeasurement. Solid lines show fittings of the Arrhenius law.

half-filled electronic state indicated by the band calculations (Fig. 2c), the semiconducting behavior suggests that
2MeS-2EDOT∙BF4 is in a “genuine (half-filled) Mott state”
with localized and poorly conducting electrons becauseof on-site Coulomb repulsion (U). The semiconducting
behavior despite large W indicates that U is dominant over
W in this system. Such a genuine Mott state (expressed as
U > W) with large W is quite rare in organic conductor series.
The semiconducting behaviors were likewise observedin 2MeS-2EDOT∙ClO 4 and 2MeS-2EDOT∙PF 6, and theroom temperature ρ was determined as 4.3 × 103 Ω cm
for 2MeS-2EDOT∙ClO4 and 4.3 × 104 Ω cm for
2MeS-2EDOT∙PF 6, respectively. The increase of ρ by
one order of magnitude each was observed as the anion
size increased and the π-stacking distances elongated(BF4−<ClO4−<PF6−, Fig. 2d). Activation energies were also
determined as 223.6 ± 0.5 meV for 2MeS-2EDOT∙ClO4
and 277.9 ± 1.4 meV for 2MeS-2EDOT∙PF6, reflecting
the chemical pressure effect from the anion sizes. It is tobe noted that in the ρ–T−1 plot for 2MeS-2EDOT∙BF4, we
observed a slight transition at 160 and 175 K for the coolingand heating processes, respectively , with a hysteresis of T
(Fig. 2d), suggesting that a first-order phase transition is
involved.
In conclusion, we developed tightly π-stacked models
for discrete EDOT dimers 2MeS-2EDOT∙A. These models
exhibited unique 1D half-filled electronic structures with
exclusively large band width (W ≈ 1 eV) along the intracolumnar direction, implying the origin of the high electricalconductivity of doped PEDOT. The room temperature
conductivities (σ = ρ−1; < 3.6 μS cm−1) were lower than thatof doped PEDOT (> 4000 S cm−1), which may originate
in the genuine Mott state of our models caused by large U
relative to W. The control of the competition between U and
W in these systems (e.g., by elongating conjugation lengths
to reduce U) may realize a variety of electronic states,
including the metallic and even superconducting states. This
unique approach of controlling U is accessible exclusively
using our oligomer strategy. The construction of an oligomer
library will further elucidate relationships between the structures and electronic properties.
References[1] R. Kameyama, T. Fujino, S. Dekura, M. Kawamura, T. Ozaki, and
H. Mori, A European Journal, 27, 6696 (2021).
[2] R. Kameyama, T. Fujino, S. Dekura, and H. Mori, Phys. Chem.
Chem. Phys. 24, 9130 (2022).
[3] R. Kameyama, T. Fujino, S. Dekura, S. Imajo, T. Miyamoto, H.
Okamoto, and H. Mori, J. Mater. Chem. C. 10, 7543 (2022).
Authors
R. Kameyama, T. Fujino, S. Dekura, M. Kawamura, T. Ozaki and H.
MoriTopological Thermoelectric Effects in
Organic Dirac Fermion System
Osada Group
Two topological thermoelectric effects, the nonlinear
anomalous Ettingshausen effect and the quantized thermoelectric Hall effect, were investigated in the two-dimensional(2D) organic Dirac fermion (DF) system a-(BEDT-TTF)2I3.
(1) Nonlinear anomalous Ettingshausen effect (AEE)
So far, we have experimentally confirmed that the weakcharge ordering (CO) state of α-(BEDT-TTF)2I3, which is theFig. 1. Schematic of the current-induced topological transportphenomena, nonlinear anomalous Hall and Ettingshausen effects, inthe current-carrying state in the thermally isolated 2D massive Diracfermion system. Λ (Θ) indicates the (thermoelectric) Berry curvature
dipole.

region close to the 2D massless DF phase in the CO phase,is a 2D massive DF state with a small CO gap. Because thefinite Berry curvature dipole was expected in the massive DF
state with tilted Dirac cones, we experimentally searched forthe nonlinear anomalous Hall effect (AHE) in the currentcarrying state in the weak CO state at zero magnetic field,
and successfully observed it.
Here, we newly proposed a novel current-induced
thermoelectric phenomenon, the nonlinear AEE, which isa thermoelectric analogue of the nonlinear AHE [1]. The
thermoelectric Berry curvature dipole was introduced to
explain this thermoelectric effect instead of the Berry curvature dipole. The nonlinear AEE is a phenomenon in whicha temperature gradient proportional to the square current
is induced in the direction perpendicular to the current. It
exhibits rectifying characteristics (nonreciprocity). The
generated transverse heat current flows unidirectionallyeven under an AC current. The nonlinear AEE occurs simultaneously with the nonlinear AHE as shown in Fig. 1. We
estimated that the nonlinear AEE is sufficiently observable in the current-carrying state in the weak CO state ofα-(BEDT-TTF)2I3.
(2) Quantized thermoelectric Hall effect (QTHE)
The high-performance thermoelectricity, that is boundlessincrease of the Seebeck coefficient Sxx, has been theoretically and experimentally investigated in 3D topologicalsemimetals with nodal points (Dirac/Weyl semimetals) at thehigh-magnetic-field quantum limit. Recently, more advantageous thermoelectric effect called QTHE was proposed in
the 2D massless DF system at the clean limit. The thermoelectric conductivity αxy takes a quantized constant value of(4log2)kBe/h, which is independent of temperature, magnetic
field, and carrier density. It causes the boundless increase of
Sxx even at low temperatures. α-(BEDT-TTF)2I3 was considered as one of candidate materials.
We investigated the thermoelectricity of the 2D massless
DF system in real α-(BEDT-TTF)2I3 under high magnetic
fields [2]. Because of its small electron group velocity, theZeeman splitting becomes relatively important and cannot beignored in α-(BEDT-TTF)2I3. We showed that the Zeeman
splitting of the n = 0 Landau level suppresses the QTHE:
αxy decreases from the quantized value at low temperaturesleaving a shoulder-like structure, and Sxx decreases after
linear increase at high magnetic fields leaving a hump-

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in artificial quantum systems without dissipation, such as
trapped ions, NV centers in diamonds, and digital quantum
computers. However, it had not been explored in solidstate materials, in which unavoidable dissipation is hard tocontrol. Therefore, if one realizes the DTC phase in thosematerials, it could offer a new possibility of controlling theirproperties and functionalities.

Fig. 2. The magnetic field dependence of the Seebeck coefficient of the2D massless Dirac fermion system at a fixed carrier density around thecharge neutrality point. The solid and dashed curves are for cases withand without the Zeeman effect.

like structure (Fig. 2). These features were observed in
our previous experiment. In contrast to 3D nodal-point
semimetals with robust gapless features, it is difficult torealize the QTHE in real 2D Dirac fermion systems dueto the Zeeman gap in the n = 0 Landau level under highmagnetic fields.
References[1] T. Osada and A. Kiswandhi, J. Phys. Soc. Jpn. 90, 053704 (2021).
[2] T. Osada, J. Phys. Soc. Jpn. 90, 113703 (2021).
Authors
T. Osada, A. Kiswandhi, M. Sato, K. Uchida, and T. Taen

Discrete Time Crystals in Solids
Tsunetsugu GroupA discrete time crystal (DTC) is an exotic nonequilibrium phase of matter that is realized in periodically driven
quantum systems and characterized by the breakdown of
the discrete time translation symmetry [1]. The DTC phasehas been well studied and experimentally demonstrated

In this study [2], we have studied the DTC phase in solidstate materials and uncovered its mechanism and properties.
We have analyzed a ferromagnetic quantum Ising model
periodically driven by a train of magnetic field pulses eachcorresponding to (nearly) π-pulse (period τ). Using the
Floquet-Redfield equation, we have incorporated dissipations due to the couplings of the quantum spins to theirsurrounding phonon bath. This is much harder to solve thanthe usual Schrödinger equation because it requires treatinga D × D density matrix rather than a D-dimensional wave
function (D denotes the Hilbert space dimension, which
increases exponentially with the number of spins). To
circumvent this problem, we have employed the mean-field
theory and numerically obtained the DTC order parameter ina self-consistent manner.
Performing massive numerical calculations on the
supercomputer at ISSP, we have determined the DTC phase
diagram in solids as shown in Fig. 1. In the normal phase,the system relaxes to a nonequilibrium steady state which
oscillates periodically with the same period τ as the drive’s.
On the other hand, in the DTC phase, the system turns into
a time crystal which oscillates with the doubled period
2τ. These results show that DTCs can be realized in realmagnetic materials subject to dissipation at low temperatures
if the pulse interval is either long or short enough. Interestingly, this phase diagram highlights a reentrant behavior of
the DTC phase as the pulse interval is varied.
We have further proposed how to realize and detect the
DTC in experiments. We have analyzed the robustness of
the DTC against imperfections in pulse shapes unavoidable
in experiments such as their height and duration; We haveshown that those imperfections do not break the DTC phase.
We have also shown that critical phenomena accompany
the DTC phase transition. In particular, when temperature isvaried to cross the DTC/normal phase boundary, the decayof the DTC order parameter exhibits a power-law in timerather than an exponential. This characteristic behavior canbe used as an indicator for the DTC in finite-time experiments. We have finally estimated the parameters for realizing
DTC phase and proposed that the electron spin resonance onsome magnetic materials may be a promising experimental
platform. We believe that these results pave the way for a
new research field of time crystals in material science.
References[1] K. Sacha and J. Zakrzewski, Rep. Prog. Phys. 81, 016401 (2018).
[2] K. Chinzei and T. N. Ikeda, Phys. Rev. Research 4, 023025 (2022).
Authors
K. Chinzei and T. N. Ikeda

Fig. 1. Phase diagram of the discrete time crystal in solids, and theamplitude of the DTC order parameter is shown by color. The temperature T of the bath is normalized by the equilibrium ferromagnetictransition temperature Tc. τ is the interval between the consecutive
pulses in units of J = ħ = 1 (J is the exchange energy).

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ISSP Activity Report 2021

High-Harmonic Generation in GaAs
beyond the Perturbative Regime
Itatani and Kato Groups
Recently, high-harmonic generation (HHG) has been
experimentally observed in solids. In contrast to gaseous
media, solids have the vastly diverse nature such as in theirband structures, energy gaps, crystalline anisotropy, andmagnetism. It has thus far been experimentally and theoretically investigated in various solids, but comprehensive
understanding of the crossover behavior from the perturbative to the nonperturbative regime has not been gained
yet. Such an understanding requires a unified viewpointconnecting the perturbative to nonperturbative regimes.
In the perturbative regime, it is well known that the intensity of the nth-order harmonics obeys an E2n scaling law withrespect to the field amplitude E. In the conventional formulation of nonlinear optics using the Bloch basis, this scaling
law is successfully explained by the multiphoton interband
transition of Bloch electrons. The E2n scaling, however,breaks down at sufficiently high fields (typically at several
MV/cm). In recent theoretical studies, this nonperturbative
nature of HHG is explained by the alternative formulation,in which intraband electron acceleration motion is taken into
account with a new basis called the Houston basis. In spiteof these theoretical developments, it has not been clarified
yet how the properties of HHG in the nonperturbative regime
are seamlessly connected to those in the perturbative regime
where the E2n scaling holds. For a clear understanding on
this crossover behavior, accurate measurement of the field-

Fig. 1. (a) Experimental setup for HHG in reflection geometry using
bulk GaAs and MIR laser source. Ti:Sapphire regenerative and multipass amplifiers (450Hz, 5 mJ, 70 fs) were used to pump the opticalparametric amplifier (OPA). WGPs, a pair of wire-grid polarizers; L1(f = 300 mm) and L2 (f = 50 mm), CaF2 lenses; M1 (R = 100 mm),
Al-coated concave mirror. (b) Structure of the (110) surface of GaAs
and direction of the laser polarization. (c) Field-intensity dependencesof the 5th, 7th, and 9th harmonic spectra. (d) HHG spectrum at the peakfield of 10 MV/cm.

Fig. 2. (a) Field-intensity dependences of the 5th (red), 7th (green),and 9th (blue) HHG intensities. Two datasets (squares and triangles)
were measured in a single sweep starting from 2 to 12 MV/cm and thenfrom 12 to 2 MV/cm, respectively. Small HHG signals (circles) were
measured with a longer acquisition time. (b) Calculated results of the
Luttinger-Kohn model. In the weak-field regime, the harmonic intensities almost obey an E2n perturbative scaling law for both the measured
and calculated results (dashed black lines).

intensity dependences of HHG is crucial and indispensable.
Based on this motivation, we experimentally and theoretically investigated the field-intensity dependence of HHG
in GaAs [1]. The experiments were carried out by using an
intense mid-infrared laser irradiating a GaAs sample, as
shown in Fig. 1(a) , in the reflection geometry to minimize
nonlinear propagation effects and phase mismatch [2]. We
set the pulse duration and the wavelength of the incident
light to be 80 fs and 3.65 μm. The peak field was estimatedto be up to 12 MV/cm inside the sample. We measured
the HHG intensities as a function of the peak field of theincident pulses from 2 to 12 MV/cm. We show in Figs. 1(c)and 1(d) the obtained HHG spectra which indicate only
odd-order harmonics due to the inversion symmetry of GaAs
(Fig. 1(b)). Fig. 2(a) shows the intensities of the 5th, 7th, and9th harmonics as a function of laser intensity. This figure
indicates that harmonic intensities did not saturate monotonically with increasing laser intensity, but rather exhibited
oscillations. As the field intensity was increased, the oscillatory behaviors appeared above 4, 5, and 6 MV/cm for the
5th, 7th, and 9th harmonics, respectively, where they started
to deviate from the perturbative scaling law. An explanationof these experimental results will require clarification of thecrossover of HHG from the perturbative to the nonperturbative regime as well as the physical origin of the oscillatory
behavior.
To analyze these experimental results, we employed aneight-band Luttinger-Kohn model, which includes conduction, heavy-hole, light-hole, and split-off bands for bothspin-up and spin-down components. We introduce our

ISSP Activity Report 2021

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theoretical framework by applying our previous works [3,4]to the Luttinger-Kohn model and calculate the intensitiesof the 5th, 7th, and 9th harmonics originating from GaAs.
Consequently, we succeed in reproducing E2n scaling laws in
the perturbative regime as well as the oscillatory behaviors
in the non-perturbative regime (Fig.2(b)). By performing
further analyzation, we concluded that the diagonal elementsof the Hamiltonian representing field-induced dynamic band
modification is crucial in the nonperturbative regime. Since
this field-induced dynamic band modification can naturally
be ignored in the perturbative regime, we can easily obtainthe HHG intensities showing the crossover behavior fromthe perturbative to the nonperturbative regime. The findingsof our work give important foundation for understanding avariation of nonlinear optics from the perturbative to nonperturbative regime and open up the possibility of novel opticaltechnologies, such as strong-field coherent control of solid
HHG and Floquet engineering of dressed states in solids.
References[1] T. Tamaya, P. Xia, C. Kim, F. Lu, T. Kanai, N. Ishii, J. Itatani, H.
Akiyama, and T. Kato, Phys. Rev. B 104, L121202 (2021).
[2] P. Xia, C. Kim, F. Lu, T. Kanai, H. Akiyama, J. Itatani, and N. Ishii,
Opt. Express 26, 29393 (2018).
[3] T. Tamaya, A. Ishikawa, T. Ogawa, and K. Tanaka, Phys. Rev. Lett.
116, 016601 (2016).
[4] T. Tamaya and T. Kato, Phys. Rev. B 100, 081203(R) (2019).
Authors
T. Tamaya*, P. Xia*, C. Kim, F. Lu, T. Kanai, N.Ishii, J. Itatani, H.
Akiyama, and T. Kato
*T. T. and P. X contributed equally to this work

Einstein-de Haas Nanorotor
Kato GroupThe angular-momentum conversion phenomena between
spin and mechanical rotation are recognized as the gyromagnetic effects discovered in the early 20th century by S. J.
Barnett, A. Einstein, and W. J. de Haas. They observed
magnetization induced by mechanical rotation [1] andmechanical rotation induced by magnetization [2] known
as the Einstein-de Haas (EdH) effect, revealing the originof magnetism is the angular momentum. The gyromagnetic effects are universal phenomena that appeared even innonmagnetic materials ranging from macroscopic to microscopic scales in various branches of physics, including ultracold atoms, spintronics, nuclear spin physics, and quarkhadron physics.
In our study [3], we developed a quantum theory todescribe the microscopic mechanism of a nanorotor driven
by electron spin injection via the EdH effect. As a feasible
setup, we considered the double-wall carbon nanotube
rotor as shown in Fig. 1 (a). For the double-walled carbon
nanotube, mechanical rotational motion of the inner carbon
nanotube was already studied both experimentally [4] andtheoretically [5]. However, efficient driving forces for therotational motion are still lacking.
In this system, the rotor (the inner carbon nanotube) isdriven by four transitions as shown in Fig. 1 (b). By applying
a bias voltage between two half-metallic ferromagnetic
electrodes, an electron with a spin sz = ħ/2 tunnels from theleft electrode into the nanorotor (from (b-1) to (b-2)). This
electron cannot tunnel to the drain electrode as long as its
spin state remains sz = ħ/2 because there is no electronic

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ISSP Activity Report 2021

Fig. 1 Schematic diagram of the nanorotor rotationally driven by spin
injection. (a) The system consisting of a double-wall carbon nanotube
and two ferromagnetic electrodes. (b) The four processes for driving ofrotational motion of the nanoroter.

state for the spin sz = ħ/2 in the half-metallic ferromagnetic
drain. Electron accumulation by additional electron tunnelingis also forbidden because of the Coulomb blockade in thenanorotor that acts like a quantum dot. Therefore, only spin
flipping of the injected electron enables continuous current
flow through the rotor (from (b-2) to (b-3)). Simultaneouslywith this spin flipping, angular momentum ħ is eventuallytransferred from the injected electron to the mechanicalrotational motion. After this angular momentum transfer,the electron with the spin sz = −ħ/2 can leave the nanotube
into the right electrode. Therefore, the current through thenanorotor is expected to be a driving force of the rotationalmotion of the nanorotor in this system. In our study, we clarified that the precession of the nanorotor as shown in Fig. 1(b-3) always occurs in the angular momentum transfer fromthe electron spin to the nanorotor. Therefore, in order to drive
the nanorotor efficiently, the state of the nanoroter is needed
to be relaxed from a precession state into a sleeping top state(from (b-3) to (b-4)).
The transition into the precession state is explained asfollows. When the nanoroter is assumed to be a rigid body,its quantum states are specified by three quantum numbers,
L, M, and k, where L is the quantum number corresponding

Fig. 2. Eigenenergies of rotational motion as a function of k. The upperand lower branches correspond to the precession state (M = k ± 1) andthe sleeping top state (M = k), respectively.

to the magnitude of the angular momentum, M is the z
component of the angular momentum, and k is the angularmomentum around the axis of the rotor. In Fig. 2, we show
the eigenenergies of the roter for the sleeping top state(M = k, the lower inset of Fig. 2) and the precession state(M = k ± 1, the upper inset of Fig. 2). We showed thatthe spin-rotation coupling between electron spins and thenanoroter induces only the transition from (A) to (B) in Fig.
2 because the spin-rotation coupling only changes M withoutchanging k. Therefore, we need to introduce a phonon heatbath which causes relaxation from the precession state (B)to the sleeping top state (C). In our work [3], we discussed
a detailed condition for efficient and stable driving of therotational motion of the nanoroter.
The present driving mechanism is not restricted to carbon
nanotubes; it applies to other materials as well. The process
discussed here would be a minimal model for the momentum
transfer from an electron to rotor that effectively includes theother possible processes.
This study has been performed as a joint study withMamoru Matsuo, who was a visiting professor of ISSP in theacademic year 2016.
References[1] S. J. Barnett, Phys. Rev. 56, 239 (1915).
[2] A. Einstein and W. J. de Haas, KNAW proc. 18 I, 696 (1915).
[3] W. Izumida, R. Okuyama, K. Sato, T. Kato, and M. Matsuo, Phys.
Rev. Lett. 128, 017701 (2022).
[4] A. M. Fennimore, T. D. Yuzvinsky, W.-Q. Han, M. S. Fuhrer, J.
Cumings, and A. Zettl, Nature 424, 408 (2003).
[5] S. W. D. Bailey, I. Amanatidis, and C. J. Lambert, Phys. Rev. Lett.
100, 256802 (2008).
Authors
W. Izumidaa, R. Okuyamab, K. Satoc, T. Kato, and M. Matsuod
aTohoku University
bMeiji University
cNational Institute of Technology, Sendai College
dKavli Institute for Theoretical Sciences, University of Chinese
Academy of Sciences

stacks is beneficial for industrial on-silicon manufacture. OT
was previously discovered primarily due to the interfacial
orbital Rashba effect (ORE) in polycrystalline layered structures grown by room-temperature evaporation or sputtering,which can modulate OT through layer design. These studies
use an interface or a bulk containing Cu or Pt as a sourceof orbital angular momentum. The full d-shell of Cu andthe high SOC of Pt obstruct orbital transport and make OT
analysis in polycrystalline stacks more difficult. Oxidation helps orbital transport in Cu, adding complexity to thestructure. Meanwhile, theoretical works have focused on theorbital generation and transport in single-crystalline systems
because of the complexity of orbital transport in polycrystalline heterostructures. It is highly warranted to bridge the gap
between experiment and theory by obtaining efficient, longrange orbital transport in a uniform polycrystalline layer anddeveloping a corresponding theoretical approach to orbitaltransport that remains elusive.
We experimentally study the current induced torqueeffect in polycrystalline ferromagnetic metal (FM)/Ru/
Al2O3 stacks shown in Fig. 1(a). FM is either Co40Fe40B20
or Ni80Fe20. Using a device structure, we demonstrate ahigh torque efficiency due to the ORE at the Ru/Al2O3
interface (Fig. 1(b)). Ru is chosen because of its electronic
configuration of 4d75s1 and a small bulk-originating spinorbit torque so that orbital-current generation is allowedby orbital hybridization; the absence of d-electrons does
not limit orbital-current propagation at the Fermi levelor SOC-related relaxation, and OT is not disturbed by
the conventional spin Hall torque. We performed spintorque ferromagnetic resonance (ST-FMR) measurements

Orbital Torque in Ferromagnetic-Metal/
Ru/Al2O3 Trilayers
Otani GroupFor the development of spintronic memory and logic
devices, the efficient current-induced spin-torque effect iscritical. Spin-orbit torque, which uses spin-orbit coupling(SOC) in heavy metals (and/or Rashba interfaces) to create
spin current and resulting torque to switch the magnetization of a neighboring ferromagnetic layer, has received a
lot of attention in the last decade. The torque effect basedon orbital angular momentum injection and SOC in the
ferromagnet, known as orbital torque (OT), has recently
attracted much attention. While each electronic state in aspin current may only carry ħ/2 angular momentum, theangular momentum carried by a state in an orbital current has
no limit, implying that OT has higher efficiency. Indeed, inmost metal elements, orbital-current production efficiency
is substantially higher than its spin equivalent. Furthermore,because SOC is not required, the materials choices for theorbital source are pretty broad, rather than being confined toa few types of heavy metals like spin-current generation. As
a result, OT is a strong contender for the operating principle
of practical spintronic devices.
The development of OT devices based on polycrystalline

Fig. 1. (a) Schematic of the orbital torque in FM/Ru/Al2O3. (b) Experimental setup of the ST-FMR measurement. (c)–(f) ST-FMR spectra andfitting for the CoFeB(7)/Ru(6)/Al2O3(2) (c) and CoFeB(7)/Ru(6) (d)devices at 8 GHz, and NiFe(7)/Ru(6)/Al2O3(2) (e) and NiFe(7)/Pt(1)/Ru(6)/Al2O3(2) (f) devices at 6 GHz. The red circles are experimental
data; the red lines are fitting curves. The symmetric and antisymmetriccomponents plots are in the right panel with green and blue lines.
Schematics of the sample layout are shown in the inset.

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7

(Fig. 1(b)) on the polycrystalline FM/Ru/Al2O3 stacks.
Figure 1(c) shows the Vmix signal obtained from the ST-FMR
measurement of a Co40Fe40B20(7)/Ru(6)/Al2O3(2) (units innanometers) trilayer. The signal Vmix is decomposed into
symmetric (S) and asymmetric (A) Lorentzian components,
revealing sizable negative S components that indicatesthe current-induced damping-like torque. From systematic studies in this work, we find characteristic behaviorsof OT: (i) the sign and magnitude of the torque efficiency
are strongly dependent on the FM materials and insertion
layers according to the sign and magnitude of their SOC(Fig. 1(c) and (e)); and (ii) torque efficiency is enhanced withincreasing CoFeB layer thickness tF, with a large saturation
torque efficiency of 0.3 for tF = 12 nm, consistent with thelong propagation length of the orbital current in the ferromagnet. Our quantum evolution simulation shows the uniquerandom processing feature of orbital transport in polycrystalline materials, enabling long-range orbital transport inpolycrystalline samples, even in a crystal field.
This study concludes that transition metal-basedmaterials with a small SOC, simple structure, and itinerantd-electrons can provide a suitable platform for studying
orbital transport in polycrystalline structures and developing
torque devices.
Reference[1] L. Liao, F. Xue, L. Han, J. Kim, R. Zhang, L. Li, J. Liu, X. Kou, C.
Song, F. Pan, and Y. Otani, Phs. Rev. B 105, 104434 (2022).
Authors
L. Liao, F. Xuea, L. Hanb, J. Kimc, R. Zhangb, L. Lia, J. Liua, X. Koua,
C. Songb, F. Panb, and Y. Otani
aShanghaiTech University
bTsinghua University

Planar Hall Effect on the Output Signal
in T-Shaped Spin Conversion Device
Otani GroupThe T-shaped spin conversion device consisting of ferromagnetic and spin Hall (or spin conversion) materials is
an indispensable component in a new type of logic circuit:magnetoelectric spin-orbit logic circuit. In this device, aspin polarized current is directly injected into the spin Hall
material from the ferromagnet, and the inverse spin Hall
effect (ISHE) is detected as the transverse voltage as shownin Fig. 1 (a). The output signal can be an order of magnitude
greater than that of the nonlocal methods. Pham et al. havedemonstrated an increase in the ISHE signal by scaling down
the T-shaped device structure, that is favorable for the highdensity device [1]. They also discussed the adverse effects of
the adjacent ferromagnet on the total signal via a transverse
anisotropic magnetoresistance, the planar Hall effect (PHE),
concluding that it only causes the offset of the output signal.
However, our recent experiments showed the superpositionof the signal induced by PHE which change its sign uponmagnetization reversal.
In this work, we investigated the influence of PHE on
the ISHE induced voltage on the T-shaped device. The
T-shaped Pt wires were first formed on the Si/SiO2 substrateusing e-beam lithography, e-beam deposition, and liftoff.
The thickness of Pt is 20 nm. We then deposited a ferromagnetic wire on the Pt. Figure 2(b) shows the magnetic fielddependence of Rxy in the Pt/FeNi device. One can extract

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ISSP Activity Report 2021

Fig. 1. (a) Schematic of ISHE measurement in the T-shaped spin
conversion device. (b) Magnetic field dependence of the transverse
resistance Rxy in the Pt/FeNi device with θ = 0°. Red and blue arrows
show the magnetic field sweeping direction. (c), (d) asymmetric andsymmetric components of Rxy. (e), (f) Magnetic field angle dependences of the asymmetrical and symmetrical components H = 0.8 T.

the asymmetric contribution in Rxy by calculating the difference between the signals measured at trace and retrace
scan. Figures 1(c) and (d) show asymmetric and symmetriccomponents as a function of the applied field, respectively. Figure 1 (e) and (f) show the magnetic field angle
dependences of the symmetric and symmetric components,
respectively. The ISHE causes an asymmetric componentof the transverse resistance in the T-shaped device structure.
On the other hand, we found that the PHE contributes tothe transverse voltage as a symmetric component because
the magnetic moment continuously rotates clockwise (orcounterclockwise). From the experimental results, the spin
Hall angle of Pt and the anisotropic magnetoresistance ratioof FeNi were estimated to be ~ 3.0% and ~ 1.0%, respectively, that are in the same order as the reported value. We
did same measurement on a Pt/CoFe device. The overallchange in the asymmetric component is almost the sameas that in the Pt/FeNi, while the change in the symmetriccomponent is about half of that in the Pt/FeNi device. This
reduction of the symmetric signal is attributed to the lower
anisotropic magnetoresistance ratio of CoFe than that of
FeNi. Therefore, it is essential to use the ferromagnet thathas small anisotropic magnetoresistance ratio to reduce theadverse effect in the T-shaped device.
In conclusion, our systematic studies reveal that the PHE
causes a symmetric component in the output signal becauseof the continuous clockwise (or counterclockwise) magnetic
rotation. We find that we can suppress the undesired signal
by choosing a low AMR ferromagnet such as the CoFe
alloy. These results help us to design the T-shaped device
structure for studying spin conversion in spin Hall materials,
topological insulators, and Rashba interface for developing
the spintronic logic devices.

References[1] V. T. Pham, I. Groen, S. Manipatruni, W. Y. Choi, D. E. Nikonov, E.
Sagasta, C.-C. Lin, T. A. Gosavi, A. Marty, L. E. Hueso, I. A. Young,and F. Casanova, Nat. Electron. 3, 309 (2020)[2] H. Mizuno, H. Isshiki, K. Kondou, Y. Zhu, and Y. Otani, Appl.
Phys. Lett. 119, 092401 (2021)
Authors
Y. Otani and H. Isshiki

Squeezed Abrikosov-Josephson Vortex
Hasegawa Group
Two-dimensional (2D) superconductors are sensitive tothe presence of disorder, which induces electron localization, phase fluctuation, and eventually the superconductinginsulator transition at zero temperature. Here we present a
new way of introducing disorder into high-quality monolayer
superconductors by forming them on vicinal substrates. We
fabricated the striped incommensurate (SIC) structure, one of
the Pb monolayer superconducting phases, on vicinal Si(111)substrates tilted by 1.1° or 0.5°. Since each step works as
a disorder and behaves like a Josephson junction, by justadjusting the miscut angle, the step separation, or disorderdensity, can be controlled precisely.
The role of a single step on atomic-layer superconductors has been investigated by scanning tunneling microscopy (STM) [1]. The shape of vortex cores trapped at steps
depends on how the step decouples the superconducting
terraces. When the decoupling is weak, round Abrikosov
vortex is pinned at the step. With the intermediate decoupling, trapped vortices are elongated along the step, which iscalled a Abrikosov-Josephson vortex (AJV) and their local

Fig. 1. (upper panels) ZBC maps taken on flat and 1.1°-tilted vicinal
SIC samples showing vortices under out-of-plane magnetic field of
120 mT. (lower panel) ZBC profiles across the vortex center taken on
the flat (black triangles) and the vicinal (blue squares and light blue
circles) samples, respectively. Blue squares (light blue circles) indicate
the profiles taken in the direction perpendicular (parallel) to the steps.
Empty blue (light blue) triangles are the profile taken on the vorticesof the flat sample multiplied by 0.78 in height and by 1.56 (0.76) along
the horizontal axis, demonstrating similarity in the three profiles. Insets
show the averaged vortices taken on the flat and vicinal samples.

density of states (DOS) within the gap is not fully recovered at the core. In the case of the strongly decoupling step,a further elongated vortex with local DOS almost same asthat of superconducting states, that is, Josephson vortex, isformed along the step.
Through the electron transport measurement underout-of-plane magnetic fields B, we found that the criticalmagnetic field (Bc2) of the superconducting phase formedon vicinal substrates is higher than that formed on the flat
substrate. Using STM at 0.36 K, we estimated Bc2 from themagnetic field that saturates the conductance at the bottomof the superconducting gap, that is, zero bias conductance(ZBC), and found consistent with those of the transportmeasurements.
In order to understand the enhanced Bc2 microscopically, we investigated vortices by STM. The upper panels of
Fig. 1 are ZBC maps showing the vortices taken on the flatand 1.1°-tilted SIC sample under B = 120 mT. Comparedwith the round vortices observed on the flat sample, thevortices on the tilted sample are elongated along the step
direction. In addition, ZBC at the center is suppressed. Sinceboth are characteristic features of AJV we attribute them toan AJV.
According to the Ginzburg-Landau (GL) equation, thecritical field is inversely proportional to ξ2. Since the sizeof vortex is closely related to ξ, we investigated the size andshape of the vortices. The lower panel of Figure 1 shows the
ZBC cross-sectional profiles taken on vortices on the flat
sample (black triangles), on the vicinal sample in the directions parallel (//, light blue circles) and perpendicular (⊥,blue squares) to the steps. From the plot we found that thesethree profiles have a similar shape. First, on the vorticesof the vicinal sample, ZBC at the center is suppressed bya factor of 0.78. Then, the suppressed profile was laterally
expanded by a factor of 1.56 (shrunk by 0.76) to find good
agreements with the parallel (perpendicular) profiles of thevicinal sample’s vortices.
Curiously, the squeezing ratio in the perpendicular
direction, 0.76, corresponds well to the inverse of the Bc2
enhancement ratio (Bc2,flat/Bc2,vicinal). According to the anisotropic 2D GL model, Bc2,vicinal is given by Φ0/2πξ ⊥ ξ//, whereξ ⊥ and ξ// are the coherence length in the directions perpendicular and parallel to the steps. Thereby the correspondence
suggests us that the Bc2 enhancement is due to the reduced
coherence length ξ ⊥ by the presence of the steps.
The reduction in ξ by the high-density steps is explainedby the suppression of mean free path l by disorder according−
to the equation ξ = √ ξ0l , where ξ0 is the coherence length
without disorder. Since l is written as h/e2kFρ for a 2D
system, where ρ is the resistivity, in a 2D metallic layer withan array of linear resistors at equal interval w as shown in
the inset of Fig. 2(a), we found Bc2.vicinal/Bc2.flat is written as(1 + α/w)-1/2, where α ≡ ρstep/ρterrace is a ratio of step andterrace resistivity. Figure 2(a) shows Bc2 dependence on
the terrace width w obtained from our experimental results
including those of 0.5°-tilted vicinal sample. A solid curve
is a fitted one with α = 15.4 nm, showing good agreement.
Since lflat ~ 3.3 nm we estimates l ⊥ for 1.1° (0.5°) -tilted
vicinal SIC phases is 1.6 (2.3) nm, respectively.
One of the characteristic features of AJV is the suppression of DOS within the gap at the vortex core. According
to the calculations of AJV [1], the DOS suppression is
described as t2, where t is the ratio of hopping strength
across the step to that within the terrace. Since the width ofthe elongated vortex core is given by 2ξ ⊥ , vortices on the

ISSP Activity Report 2021

9Fig. 2. (a) Terrace width dependence of the critical magnetic field.
The solid curve is a fitting described in the text. The inset shows aschematic of the arrayed resistors to model the vicinal SIC phases. (b)terrace width dependence of the suppressed DOS at the vortex center.
The solid curve is a fitting written in the text.

vicinal substrates cross the steps 2ξ ⊥ /w times. The effective hopping strength ratio across the steps is thus given ast2ξ⊥/w. Figure 2(b) shows the terrace width dependence ofthe suppression factor t4ξ⊥/w. A solid green curve is a fitting
one with ξ ⊥ = ξflat (1 + α/w)-1/2, showing a good agreement
when t = 0.96. Considering an almost round shape of vortices
trapped at a single step of the same SIC phase [1], theestimated value close to 1 is reasonable. We thus conclude
that the elongated vortices observed on the vicinal samples
are due to the formation of AJV. They are, however, different
from ones formed on a single step that have the width ofthe coherence length. In the vicinal SIC phases, AJV aresqueezed in the direction perpendicular to the steps becauseof the limited mean free path in the direction.

stoichiometric bulk evaporation sources are available. This
universal nature of PLD stems from the near-stoichiometrictransfer of material from the source to the film in the laser
ablation process. However, despite this universal nature of
PLD, it is also generally understood that the highest crystalline quality in thin films can be achieved by molecular beam
epitaxy (MBE), rather than PLD. The inferior quality of
PLD-grown films often manifests itself in the form of higher
defect density, lower carrier mobility in semiconductors,
inferior dielectric permittivity compared to bulk crystals,
and in systematic shifts of film lattice parameters comparedto known bulk reference values. These functional property
differences in PLD films can be traced back to stoichiometry
shifts in the deposition process and mechanical damage tothe film due to the high-energy plasma in the laser ablation
plume.
The stoichiometry shift may be related to nonstoichiometric evaporation of different elements from an ablation
target, to a difference in the scattering spread of atoms withdifferent weight in the gas phase as the ablation plume
expands and interacts with the ambient background gas, orto selective re-evaporation of some atomic species from afilm surface at the growth temperature. Depending on whichmechanism is responsible, the target composition, ablation
laser pulse power density, or the growth temperature andgrowth rate can be adjusted to correct for the stoichiometryerrors.
A more difficult question is how to handle the formation of point defects in the film due to the high kinetic
energy of atoms that impinge on the film surface. Timeof-flight measurements have shown that the kinetic energy
of atomic species in a laser ablation plume can reach 100
eV, depending on the energy transfer from laser light tothe expanding plasma. This energy is sufficient to cause
sputtering damage on the film surface and thus leads to theformation of point defects that are not related to any stoichiometry errors. For oxide thin films, such point defect damage
can be detected as an expansion of the film lattice comparedto known bulk reference value. An effective way to reducesuch sputter damage is to reduce the kinetic energy of theplume by introducing a dense background gas. As illustrated
in Fig. 1, the position of a SrTiO3 film x-ray diffraction(XRD) peak changes as a function of the ambient oxygenpressure. An overlap of the homoepitaxial film peak with theReference[1] S. Yoshizawa et al., Phys. Rev. Lett. 113, 247004 (2014).
Authors
Y. Sato, M. Haze, S. Yoshizawaa, T. Uchihashia, and Y. Hasegawa
aNational Institute for Materials Science

Thin Film Growth by
Energy-Moderated Laser Ablation
Lippmaa Group
Pulsed laser deposition (PLD) is one the most successful
thin film growth methods for oxides and other materials
with very high melting points. The main merit of PLD is theability to grow thin films of almost any material for which

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ISSP Activity Report 2021

Fig. 1. X-ray diffraction patterns of homoepitaxial SrTiO3 films
grown by PLD at several oxygen pressures. The film peaks separate
from the substrate position 46.4° due to lattice expansion caused bypoint defects. An overlap with the substrate is achieved only at very
high oxygen pressure (100 mTorr).

Authors
R. Takahashia, T. Yamamotob, and M. Lippmaa
aNihon University
bNagoya University

Functionalization of the MoS­­­2 Basal Plane
for Activation of Molecular Hydrogenby Pd Deposition Studied by AmbientPressure X-ray Photoelectron Spectroscopy
Yoshinobu and I. Matsuda Groups

Fig. 2. Reciprocal space maps of homoepitaxial SrTiO3 films
grown in (a) 10-5 Torr of O2 and (b) mixture of 10-5 Torr O2 / 600
mTorr He. The film peak exactly overlaps with the substrate peakwhen the kinetic energy of the plasma plume is moderated by thepresence of He in the film growth chamber.

SrTiO3 substrate peak was obtained at 100 mTorr oxygenpressure. Using very high oxygen pressure during film
growth is not a good solution because it reduces the deposition rate, may cause gas-phase stoichiometry errors, anddegrades the surface flatness of oxide films.
In this work, plasma kinetic energy moderation was
therefore done by introducing He gas into the processchamber to a pressure of 600 mTorr [1]. Despite the highpressure, the presence of He does not reduce the deposition
rate significantly and allows for independent adjustmentof the reactive oxygen pressure while the kinetic energyof the plume can be reduced by an order of magnitude. As
the maximum energy of plasma species drops below about
20 eV, sputter damage of the thin film is nearly eliminated.
A dramatic change in the film structure can be seen in thereciprocal space maps in Fig. 2. The map shown in panel(a) is for a homoepitaxial SrTiO3 film grown at an oxygenpressure of 10-5 Torr. The film diffraction peak is clearlyshifted away from the substrate, indicating that the film
lattice is strongly expanded. Separate composition analysis
showed that the film was very close to stoichiometric anda Sr/Ti ratio error cannot be the cause of the lattice expansion. In contrast, panel (b) shows a map for a film grown ina mixture of 10-5 Torr of oxygen and 600 mTorr of He. No
separate film peak is visible in this case since the homoepitaxial film peak overlaps exactly with the substrate peak.
High-pressure He in the PLD chamber thus effectively
moderates the kinetic energy of the ablation plume and eliminates the sputtering damage of the oxide film. The kinetic
energy is a function of the laser peak power and thus depends
not only on the pulse energy but also on the pulse length. The
kinetic energy moderation is thus an especially important
technique for improving thin film quality when a Nd:YAG
lasers with a pulse length of close to 4 ns are used for PLD
growth of thin films.
Reference[1] R. Takahashi, T. Yamamoto, and M. Lippmaa, Cryst. Growth.
Des. 21, 5017 (2021).

Molybdenum disulfide (MoS2) is one of the transitionmetal dichalcogenides (TMDs) and has a layered structure.
The monolayer or multilayer MoS2 is expected to havevarious applications such as field-effect transistors, optoelectronic devices, and gas sensors due to the unique opticalproperties, sufficiently high carrier mobility, and excellent
chemical and thermal stability. In addition, MoS2 has beenused as industrial catalysts for many years. For example,
the Co-MoS2/Al2O3 catalyst has been industrially used asa hydrodesulfurization catalyst that hydrogenates sulfur
contained in crude oil to improve the purity. Thus, the MoS2
surface is a reaction field for various catalytic reactions
involving hydrogen atoms. The dissociative adsorption ofhydrogen molecules on MoS2 surfaces is considered to be athermally activated process. At room temperature, the basal
plane of MoS2 is inert for the dissociation of molecularhydrogen. Therefore, creating active sites for the hydrogendissociation on the MoS2 basal surface is expected to lead tohigher efficiency of hydrogenation reactions and hydrogengas sensors using the MoS2 crystal.
We investigated the effects of gaseous hydrogen exposureon the bare MoS2 and Pd-deposited MoS2 basal surfaces
using ambient-pressure X-ray photoelectron spectroscopy[1]. In the Mo 3d core-level, S 2p core-level, and valenceband photoelectron spectra of a bare MoS2 surface, littlechange was observed in the energy shift before and after
exposure to hydrogen gas. Upon hydrogen gas exposureon the Pd-deposited MoS2 surface, the Pd 3d XPS spectrachanged (Figs. 1(a) and (b)), which can be interpreted as
the adsorption of dissociated hydrogen atoms on the Pdsites; each peak in the photoelectron spectra (Mo 3d, S 2p,
and valence-band) shifted to a lower binding energy with

Fig. 1. (a) Pd 3d5/2 spectra of the Pd/MoS2 as a function of H2 gaspressure at 300 K. The amount of deposited Pd was estimated to be 2.0% for the amount of Mo atoms on the outermost MoS2 layer. (b) The
upper and lower figure are the fitting results for the Pd 3d5/2 AP-XPS
spectra before and after the hydrogen exposure, respectively. The green
component and blue component in the lower figure are assigned to be
surface and bulk components of the Pd islands, while the pink component would consist of both the bulk component and hydrogen atomsadsorbed surface component. (c) The relative binding energies for the
Mo 3d5/2 core-level, S 2p3/2 core-level, and valence band maximum(VBM) as a function of H2 gas pressure.

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11

Fig. 2. (Left) The schematic of the dissociation of molecular hydrogen,the adsorption of atomic hydrogen on the Pd-deposited sites on the
MoS2 surface and the spillover of hydrogen atoms onto the MoS2
surface. (Right) The energy diagram of the Pd-deposited MoS2 surface
before and after hydrogen exposure.

0.1 eV (Fig. 1(c)). When hydrogen gas was evacuated, thepeak energy remained lower compared with that beforehydrogen gas exposure (Fig. 1(a)). These results indicatethat the dissociation of molecular hydrogen and the adsorption of atomic hydrogen occur on the Pd-deposited sites on
the MoS2 surface, and thereafter hydrogen atoms spillover
onto the MoS2 surface. This study shows that the active site
for the dissociation of molecular hydrogen is created on an
inert MoS2 basal surface by Pd deposition. In addition, theelectronic states of the MoS2 substrate have been modulated
by hydrogen atoms spilled over onto the MoS2 surface.
These processes and the energy diagram are schematicallyshown in Fig. 2.
Reference[1] F. Ozaki, S. Tanaka, W. Osada, K. Mukai, M.Horio, T. Koitaya, S.
Yamamoto, I. Matsuda, and J. Yoshinobu, Applied Surface Science
593, 153313 (2022).

different from the solid-state ρ and the non-availability ofaccurate ρ for solid states. In this context, we have shownthat the insufficient information contained the molecular ρ
can be augmented by adding the theoretically establishedρ-to-E relations that hold for general ρ. To demonstrate this,we have reconstructed the functional using the theoretical
relations as constraints of ML. The functional was developed
using a semilocal functional format, called meta-generalizedgradient-approximation (meta-GGA), where the density,
gradient of the density, and the kinetic energy density
are used as the descriptor. By applying thus-establishedfunctional (Vext[ρ]) to various crystalline solids, we haveshown improved predictability of the lattice parameters. The
functional was made public for the benefit of supercomputeruses [1].
Further improvement in the accuracy is most likely tobe brought by using more sophisticated descriptors, suchas the weighted densities. To get insights into it, classicalsystems provide a suitable benchmark because of the simple
structure as compared to quantum systems. In this context,
we investigated the structure of classical fluids of LennardJones particles. In the classical systems, the density to thefree-energy mapping can be rigorously described throughthe Bogoliubov-Born-Green-Kirkwood-Yvon (BBGKY)
hierarchical equations and establishing the mapping corresponds to finding a universal closure relation, or simply aclosure, that can appropriately truncate the hierarchy. To
investigate it, we used the method of adiabatic continuationof the interaction and the scheme of functional renormalization group (FRG). We have obtained this way the flow
equation that is suitable for deriving a working equation for
numerical work. We focused herein on the Kirkwood super-

Authors
F. Ozaki, S. Tanaka, W. Osada, K. Mukai, M. Horio, T. Koitayaa, S.
Yamamotob, I. Matsuda, and J. Yoshinobu
aInstitute for Molecular SciencebTohoku University

Development of Accurate Density
Functional Theory
Sugino Group
Significance of the density functional theory (DFT) isin the ability to obtain the particle density ρ and the energy
E without knowing the many-body wave function or theGreen’s function. Establishing the ρ-to-E mapping (or thefunctional E[ρ]), or equivalently the mapping to the externalpotential (Vext[ρ]), is a grand challenge of computational
materials science. This can be done, in principle, by inverting
the Vext-to-ρ relations that are provided by performing
extremely-high-precision simulations; but there was no suchtrial until very recently. Such machine-learning (ML) based
approach may be enabled by overcoming problems associated with handling very large dataset. With this in mind, we
have previously done accurate quantum chemical simulations of a few molecules and the resulting density-to-energy
relation was modeled with the neural network technique. The
functional thus developed was found to improve the accuracyof molecular calculations showing a promise of achieving thechemical accuracy with DFT; however, application to solids
was hampered by the fact that the molecular ρ is qualitatively

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ISSP Activity Report 2021

Fig. 1. Machine learning of the density functional V[ρ] made possibleusing combined molecular data and theoretical conditions. The
functional thus constructed can be applied to extended systems likesolids not included in the learning set.

Fig. 2. Density functional theory for classical systems. Flow equation
suitable for numerical work was developed to be used for the machinelearning of the density-to-free energy mapping.

position with which to decompose the n-particle density into
two-particle densities, which is strikingly accurate in the
low-density region. By applying the resulting equation to a
one-component one-dimensional fluid, we found it possible
to obtain accurate density and energy when compared withother liquid theories. This result is already a demonstrationof the power of the Kirkwood approximation combined with
FRG in describing classical liquids, but more importantly,
the resulting method has a form suitable for ML and thus
encourages future work on the construction of the functional[2].
References[1] R. Nagai, R. Akashi, and O. Sugino, npj Compt. Mater. 6, 1 (2020);
ibid, Phys. Rev. Res. 4, 013106 (2022).
[2] T. Yokota, J. Haruyama, and O. Sugino, Phys. Rev. E 104, 014124(2021).
Authors
R. Nagai, aR. Akashi, bT. Yokota, and O. Sugino
aNational Institute for Quantum Science and Technology
bInterdisciplinary Theoretical and Mathematical Science Program,
RIKEN.

Resolving the Berezinskii-KosterlitzThouless Transition in the
Two-Dimensional XY Model with
Tensor-Network-Based Level Spectroscopy
Oshikawa Group
The Berezinskii-Kosterlitz-Thouless (BKT) transition
was historically the first example of topological phase transitions, which is now an essential concept in physics as signified by the Nobel Prize in Physics in 2016. The canonicalmodel exhibiting the BKT transition is the classical XY
model in two dimensions. The BKT transition is conceptually well understood in terms of the Kosterlitz Renormalization Group (RG) equation. However, the famous “Kosterlitz
RG flow” has remained a rather abstract concept, which

Fig. 1. The “level spectroscopy” applied to the classical two-dimensional XY model with the tensor-network renormalization. The crossingof the two “energy levels” (eigenvalues of the transfer matrix) ina finite-size system gives a precise estimate of the BKT transition
temperature, as the logarithmic correction is cancelled out.

Fig. 2. The Renormalization-Group flow for the BKT transition in theclassical two-dimensional XY model, constructed numerically from thetransfer matrix spectrum based on the combination of tensor-network
renormalization and conformal field theory.

cannot be seen directly. Moreover, because of the notorious
logarithmic corrections, significant finite-size effects
persist even in a large system, making conventional finitesize scaling of Monte Carlo methods such as Binder plot
powerless. Even with considerable efforts over decades, anaccurate determination of the critical temperature remains
difficult, even with a huge computational power, for thesystem as simple as the classical XY model in two dimensions.
On the other hand, many one-dimensional quantum
systems can be also described by the same effective theory
and thus also exhibit the BKT transition. Interestingly,
a powerful numerical finite-size scaling method called“level spectroscopy” was developed specifically for those
1D quantum systems by Okamoto and Nomura. Based on
the conformal field theory results on the finite-size energy
spectrum thanks to Cardy, they found that the BKT transition can be identified with a level crossing between a certain
pair of the energy levels, canceling the logarithmic corrections. This allows a surprisingly accurate determination of
the BKT transition point with exact numerical diagonalization of rather small systems. However, the applications oflevel spectroscopy have been limited to one-dimensional
quantum BKT system such as quantum spin chains so far.
While it should be applicable to the spectrum of the transfer
matrix for the classical two-dimensional XY model, thelevel spectroscopy has not been applied there, because of
the difficulty in calculating the spectrum for the system with
continuous variables such as the angle of the XY spin.
In this work, we demonstrated a successful implementation of level spectroscopy on the classical two-dimensional
XY model, based on the tensor network renormalization(TNR) scheme. The TNR enables us to obtain a precise
spectrum of the transfer matrix, to which the level spectroscopy can be applied. As in the case of the one-dimensional
quantum system, it allows a very accurate determination of
the critical point by removing the logarithmic corrections
from systems of moderate sizes, which can be described by atensor network with a finite bond dimension. As a result, wehave improved the accuracy of the BKT transition tempera-

ISSP Activity Report 202113

ture in the classical two-dimensional XY model, by an orderof magnitude over the best numerical estimate in the literature.
Furthermore, our TNR study covers larger system sizes
than those in the existing level spectroscopy studies on
one-dimensional quantum systems. We found a new featureof the finite-size scaling, that leads to a further improvementof level spectroscopy. Finally, we also applied our methodology to visualize the celebrated Kosterlitz RG flow of the
BKT transition based on the numerical data, for the first time
to our knowledge.
Reference[1] A. Ueda and M. Oshikawa, Phys. Rev. B 104, 165132 (2021).
[Editor’s Suggestion]
Authors
A. Ueda and M. Oshikawa

Large Anomalous Nernst Effect andNodal Plane in an Iron-Based
Kagome Ferromagnet
Nakatsuji Group
Anomalous Nernst effect (ANE), a thermoelectric effectin magnetic material, has recently attracted attention as
unique energy-harvesting technology. It holds promise indeveloping high-efficiency energy-harvesting devices witha simple lateral structure, high flexibility, and low production cost. The design of magnetic materials that exhibitsa large ANE will help develop a novel energy harvesting
technology. Here, we observed a high ANE exceeding
3 µV/K above room temperature in the kagome ferromagnet
Fe3Sn with a high Curie temperature of 760 K [1].
Figure 1a shows the temperature dependence of anomalous
Nernst coefficient Sij and transverse thermoelectric conductivity
αji. With increasing temperature up to 400 K, the magnitudeof the ANE coefficient increases monotonically and reaches
3 µV/K above room temperature. The temperature dependence of αij / T exhibits logarithmic behavior over almost a
decade of temperature from 400 K down to 40 K, and remains
roughly constant at ˜0.02 Am-1K-2 below ˜40 K (Fig. 1b). The
logarithmic behavior of αij / T signals a nontrivial electronic
structure close to the Fermi energy.
To investigate the origin of ANE, we carried out firstprinciples calculations to analyze αij, and the calculated result
agrees well with the experimental data (Fig. 1b). We thenconclude that the origin of the ANE is a pair of partially flat

Fig. 2. (a) Nodal plane in the hexagonal Brillouin zone obtained asfollows: Δε(k) ≡ εα(k) − εβ(k) = 0, where Δε(k), εα(β)(k), and k are theenergy difference between two bands, eigenvalue for up- and downspin bands, and wave vector, respectively. The color bar shows theenergy of the nodal plane calculated without SOC. (b) Contour plot of
the sum of the Berry curvature over the occupied states (E = EF + 50
meV) on kz = 0.13 plane.

bands of up- and down-spins, known as the “nodal plane”(Fig. 2a). Indeed, strong intensity of the Berry curvature arisingfrom the flat nodal plane appears at specific chemical potentials(Fig. 2b). Similar to the nodal lines, nodal planes are ubiquitousin electronic band structures without SOC. Nodal planes often
turn into nodal lines at constant energy cuts, and these constantenergy lines lead to partially flat bands with a small energy gap
after introducing SOC. Such characteristic band structure is notunique to Fe3Sn and could be realized in other kagome latticematerials. It is well known that M points in kagome lattice
may result in van Hove singularities (namely, the derivative ofenergy dispersion is zero). Therefore, energy dispersion on lines
connecting M points could be flat compared with other k paths.
Our theoretical analysis based on the first-principles calculation clarifies that a “nodal plane” induces strongly enhanced
Berry curvature, resulting in the large ANE. The flat degenerate electronic bands provide a valuable guide to designingmagnetic materials with a large ANE.
Reference[1] T. Chen, S. Minami, A. Sakai, Y. Wang, Z. Feng, T. Nomoto, M.
Hirayama, R. Ishii, T. Koretsune, R. Arita, and S. Nakatsuji, Sci. Adv.
8, eabk1480 (2022).
Authors
T. Chen, S. Minamia, A. Sakai, Y. Wanga, Z. Feng, T. Nomotoa, M.
Hirayamab, R. Ishii, T. Koretsunec, R. Aritaa,b, and S. Nakatsuji
aThe University of Tokyo
bRIKEN Center of Emergent Matter Science (CEMS)
cTohoku University

Anomalous Scaling Behavior ofTransverse Thermoelectric Conductivity
in Ferromagnet CoMnSb
Nakatsuji Group

Fig. 1. (a) Temperature dependence of the Nernst signal (Sji) and thetransverse thermoelectric conductivity (αij) measured under an external
magnetic field of 2 T. (b) Temperature dependence of the transverse
thermoelectric conductivity (αji / T). The dark line represents αji / T
obtained by DFT calculation at EF = +88 meV.

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ISSP Activity Report 2021

Transverse transport effects such as anomalous Hall andNernst effects are effective probes to topological texture inelectronic band structures. In particular, large Berry curvature originating from Weyl nodes or nodal line structures isknown to enhance these effects significantly. In contrast to
the Hall conductivity σyx, which measures the summationof the Berry curvature below Fermi energy, the transverse
thermoelectric conductivity αyx sensitively captures the Berrycurvature in the vicinity of the Fermi energy [1]. Therefore, the Nernst effect provides complementary information
about the characteristics of the topological band structure.
Moreover, scaling behavior αyx ~ -T logT is recently reported

in ferromagnet Co2MnGa [2]. This anomaly is attributed to
the Weyl semimetal state tuned close to the quantum Lifshitz
critical point. However, the universality of this criticalbehavior is still yet to be confirmed experimentally.
Here, we report magnetic, transport, and thermoelectric
properties of single crystals of ferromagnetic CoMnSb witha high Curie temperature of 470 K [3]. The actual experimental crystal structure of CoMnSb is a 2 × 2 × 2 superstructure of the previously predicted half-Heusler structure.
Since theoretical understanding of the transverse transportphenomena in the superstructure CoMnSb is lacking, we
performed first-principles calculation of superstructure
CoMnSb to compare with experimental results.
We find a sizable anomalous Hall conductivity σyx andtransverse thermoelectric conductivity αyx experimentally.
We observe substantial anomalous Hall conductivity σyx andtransverse thermoelectric conductivity αyx. The experimental σyx (T ) is well described by DFT calculation for thechemical potential E - EF ≈ -130 meV (Fig. 1(a)), which isconsistent with the valence electron count estimated fromthe sample composition measured by Inductively Coupled
Plasma (ICP) method. Moreover, αyx exhibits -T logT cr
itical behavior instead of the conventional Fermi liquidbehavior αyx ~ T over a decade of temperature between 10
and 400 K (Fig. 1(b)). This behavior is similar to ferromagnetic Weyl semimetal Co2MnGa and nodal-line semimetals
Fe3X (X = Al, Ga) [2, 5]. Our theoretical calculation showsthat in the vicinity of the chemical potential E - EF ≈ -130
meV, the scaling behavior αyx ~ -T logT arises from Weylnodes in the band structure (Fig. 2).

Fig. 2. (a) Momentum-space distribution of Weyl nodes in CoMnSb
on the kx = 0 plane, which shows the Weyl node pair WP- (open blue
circle) and WP+ (closed red circle). The coordinate of WP- and WP+(ky, kz) are (0.21, -0.04) and (0.04, -0.21) in the unit of angstrom
inverse, respectively. Black solid lines correspond to the boundary of
the fcc Brillouin zone. (b) Band structure along A--A' (the black-dottedline) shown in (a).

In summary, we have successfully synthesized singlecrystal samples of superstructure CoMnSb and explored theirtransverse transport properties. The observed critical scaling
behavior in the transverse thermoelectric conductivity αyx ~-T logT clearly deviates from the conventional Fermi liquidbehavior, providing a hallmark of topological texture in theband structure. The comparison of experimental results with
DFT calculations shows that this critical behavior resultsfrom Weyl nodes. This result indicates that the logarithmic
criticality in the transverse thermoelectric conductivity
provides a highly sensitive signature to reveal the topologicalband texture.
References[1] G. Sharma, P. Goswami, and S. Tewari, Phys. Rev. B 93, 035116(2016).
[2] A. Sakai et al., Nat. Phys. 14, 1119 (2018).
[3] H. Nakamura et al., Phys. Rev. B 104, L161114 (2021).
[4] S. Minami et al., Appl. Phys. Lett. 113, 032403 (2018).
[5] A. Sakai et al., Nature 581, 53 (2020).
Authors
H. Nakamura, S. Minamia, T. Tomita, A. A. Nugrohob, and S. Nakatsuji
aThe University of Tokyo
bInstitut Teknologi Bandung

Phonon Spectrum of Quantum
Pyrochlores Pr2Zr2O7 and Pr2Ir2O7
Nakatsuji Group

Fig. 1. Temperature T dependence of (a) the Hall conductivity σyx, and(b) the transverse thermoelectric conductivity divided by T, αyx / T in
comparison with theoretical calculations (insets) for CoMnSb. Two
different chemical potentials, E - EF = -126 meV (black) and E - EF =-130 meV (green), are selected for calculating σyx (T ) and αyx (T ) / T .

Experimental realization of a quantum spin liquid(QSL) state is among the central topics of condensed matterphysics. In a QSL state, spins do not form long-rangeorder even down to absolute zero, characterized by strong
long-range entanglement[1]. Geometric frustrations andcompeting interactions are central ingredients to realizing
QSL states. However, almost all candidate materials discovered possess chemical or structural disorders. Thus, it is
crucial to understand the role of structural disorders. Can
structural disorder be a factor that stabilizes a QSL state, as
proposed in some theoretical studies [2]? How to experimentally distinguish the effects of structural disorders from thatinduced by the intrinsic lattice dynamics?
To answer these questions, we performed Raman
scattering spectroscopy to separate dynamic lattice effects
from the structural disorders on the Pr-based pyrochlore
oxides Pr2Zr2O7 and Pr2Ir2O7[3,4]. Both materials host
exotic ground states without long-range orders. Their CEF

ISSP Activity Report 2021

15

ground state is an Eg non-Kramers doublet, which is unprotected by the time-reversal symmetry and thus can be split bya slight deviation from the D3d local symmetry. As a result,structural disorders may play an essential role in shaping the
ground-state properties of both systems.
Our Raman studies reveal that splitting of the groundstate Eg doublet and the Eg doublet at 55 meV results fromdifferent physical origins [3]. Figures 1(a) and (b) show the
Raman spectra of CEF excitation and the CEF level schemeof Pr2Zr2O7 at 14 K, respectively. The Eg level at 55 meVis split by the T2g phonons instead of structural disorder.
The observed splitting characterized by a well-definedsymmetry can only occur in the presence of mixing withanother excitation of E symmetry, leading to a vibronic state(Fig. 1(c)). Based on DFT calculations, the vibronic state in
Pr2Zr2O7 is most likely driven by T2g phonon lying at 64.6
meV at the Γ point (Fig. 1(d)). The associated eigenvectors involve motion of O1 oxygens that modulates the Pr3+
oxygen environment (Fig. 1(e)).
Our second study [4] reveals that Pr2Zr2O7 exhibits
phonon softening, which modulates the Pr-O-Pr angle andchanges the magnetic super-exchange interaction. Comparedto Pr2Zr2O7, Pr2Ir2O7 shows a similar but much broader
phonon spectrum (Fig. 2). Given that the metallic Pr2Ir2O7
features phonon-electron scattering mechanisms, which
are absent in the insulating Pr2Zr2O7, the difference intheir phonon spectrum is likely a result of phonon-electron
scattering rather than disorders.
References[1] P.W. Anderson, Mat. Res. Bull. 8, 153 (1973).
[2] L. Savary and L. Balents, Phys. Rev. Lett. 118, 087203 (2017).
[3] Y. Xu, H. Man, N. Tang, T. Ohtsuki, S. Baidya, S. Nakatsuji, D.
Vanderbilt, and N. Drichko, Phys. Rev. B 89, 075137 (2022).
[4] Y. Xu, H. Man, N. Tang, S. Baidya, H. Zhang, S. Nakatsuji, D.
Vanderbilt, and N. Drichko, Phys. Rev. B 104, 075125 (2021).
Authors
Y. Xua, H. Mana, N. Tang, T. Ohtsuki, S. Baidyab, S. Nakatsuji, D.
Vanderbiltb, and N. Drichkoa, and H. ZhangbaJohn Hopkins University
bRutgers University

Ferrimagnetic Compensation andits Thickness Dependenceof TbFeCo Alloy Thin Films
Nakatsuji Group

Fig. 1. (a) Raman spectra of Pr2Zr2O7 at 14 K. (b) A schematic
diagram of the Pr3+ CEF levels in Pr2Zr2O7. (c) A schematic diagramof the vibronic coupling between the phonons and CEF states. (d)The Pr2Zr2O7 phonon dispersion obtained by DFT calculations. Theenergy range close to the vibronic features is shown. Dashed blue lines
represent the experimentally observed CEF vibronic excitations. The
vibronic coupling is expected to occur at the intersection point of thenonsplit CEF doublet (solid blue line) and the T2g phonon branch (redcurve). (e) Atomic displacements of the T2g phonon mode. Upper panel:
View of the unit cell. Lower panel: PrO8 octahedron site viewed fromthe [111] direction.

Fig. 2. Raman scattering spectra of (a) Pr2Ir2O7 and (b) Pr2Zr2O7 at 14
K in parallel polarization configuration.

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ISSP Activity Report 2021

Rare earth (RE)-transition metal (TM) ferrimagnetic
materials have compositions in which the antiferromagnetically coupled magnetization of RE and TM atoms compensates, resulting in a zero net magnetization. Tuning magnetization to zero is particularly advantageous in creating
efficient memory devices based on magnetic materials.
Moreover, such materials exhibit bulk perpendicularmagnetic anisotropy (PMA), whose origin is different fromthe interfacial PMA. This property offers another advantage
for applications. This study reports a systematic investigation
into the magnetic properties of ferrimagnetic TbFeCo thinfilms deposited on a Pt underlayer. Our results show that the
Tb concentration, at which magnetic moments of Tb and Fe
or Co sublattices are compensated, increases with the thickness of TbFeCo thin films because the Tb atoms are magnetically inert as they are mixed with the Pt underlayer (Fig. 1).
Furthermore, we clarify the relationship between the loss ofmagnetism of Tb atoms and bulk PMA. This study provides
a prospect for designing ferrimagnetic ultrathin films withlarge PMA, which is essential for fabricating magnetic
memory devices.

Fig. 1. (a) and (b) Tb concentration dependence of the saturation
magnetization MS (a) and the effective magnetic anisotropy energy
density Keff (b) for TbFeCo thin films with different thicknesses. The
underlayer is Pt. Red circles: Pt/TbFeCo(10 nm), blue circles: Pt/
TbFeCo(5 nm), and light blue circles: Pt/TbFeCo(1.5 nm). Red andblue broken vertical lines denote the compensation composition xc for
Pt/TbFeCo(10 nm) and Pt/TbFeCo(5 nm), respectively.

Reference[1] M. Ishibashi, K. Yakushiji, M. Kawaguchi, A. Tsukamoto, S. Nakatsuji, and M. Hayashi, Appl. Phys. Lett. 120, 022405 (2022).
Authors
M. Ishibashia, K. Yakushijib, M. Kawaguchia, A. Tsukamotoc, S.
Nakatsujia, d, e, f, and M. Hayashia, eaThe University of TokyobNational Institute of Advanced Industrial Science and Technology
cNihon University
dCREST, Japan Science and Technology Agency
eTrans-scale Quantum Science Institute, University of Tokyo
fJohns Hopkins University

Enhanced Anomalous Hall Signal
by Electrical Manipulation in
Antiferromagnetic Weyl Metal Mn3Sn
Nakatsuji, Otani, and Miwa Groups
Topological properties may play a significant rolein developing next-generation electronic devices. Weyl
semimetals characterized by linearly dispersive band
touching points may exhibit surprisingly large topologicaltransport responses, such as anomalous Hall effect (AHE),
anomalous Nernst effect (ANE), and chiral anomaly. Manipulation of such topological responses electrically may lead toa new type of nonvolatile memory device.
Recently, electrical manipulation of topological responses
for a magnetic Weyl semimetal has been demonstrated.
Magnetic switching using spin-orbit torque (SOT) is established in the antiferromagnet Mn3Sn (Fig. 1(a)) [1]. Figure.
1b shows the schematic of the electrical switching in Mn3Sn/
W memory devices. The polarization of the flowing current
determines the orientation of the magnetization of Mn3Sn.
The different states of Mn3Sn can be read by measuring
the Hall voltage, namely “0” and “1” states. For application purposes, it is essential to develop means to enhance
the readout signal of the magnetic switching in Mn3Sn.
Several ingredients determine the signal's magnitude, such as
geometrical factors of a memory cell, shunting current, andvolume fraction of the switching domain. While the former
two are extrinsic and tunable by changing the magnetic
cell and layer structure, the latter is intrinsic to the cell thatconsists of a multilayer stack.
This work optimizes the multilayer structure and deposition process and realizes a three-time enhancement of thereadout signal (Hall resistance). The Ru buffer layer isremoved from the reported Ru/Mn3Sn/W layer to decrease
the current shunting effect, and the Mn3Sn/W bilayer isdirectly deposited on the Si/SiO2 substrate. Moreover,additional annealing progress at the Mn3Sn/W interface isapplied to suppress the roughness at the Mn3Sn /W interface;
as a result, the roughness is decreased to 0.5 nm, one orderof magnitude smaller than that of the reported Ru/Mn3Sn/W
thin film.
The obtained AHE signal of the Mn3Sn/W thin film is
twice larger than the previous value reported for Ru/ Mn3Sn/W thin film. Based on the X-ray diffraction analysis, both
the decreased current shunting effect and the different orientation of Mn3Sn domains contribute to the enhancement of
the AHE signal. In the current switching measurement, theswitching volume fraction calculated by the ratio between
electrical and field switching signals is 50%, around 1.5
times larger than the reported value. The enhancement of theswitching fraction is likely related to the higher spin injection efficiency at the interface due to the smooth interface.
The enhancement of AHE and the switching fraction resultin a three-time enhancement of the switching Hall resistance(Fig. 1(c)). This finding may bring memory devices based on
topological antiferromagnet closer to real-world applications[2].
References[1] H. Tsai, T. Higo, K. Kondou, T. Nomoto, A. Sakai, A. Kobayashi,
T. Nakano, K. Yakushiji, R. Arita, S. Miwa, Y. Otani, snd S. Nakatsuji,
Nature 580, 608 (2020).
[2] H. Tsai, T. Higo, K. Kondou, S. Sakamoto, A. Kobayashi, T.
Matsuo, S. Miwa, Y. Otani, and S. Nakatsuji, Small Sci. 1, 2000025(2021).
Authors
H. Tsai, T. Higo, K. Kondoua, S. Sakamoto, A. Kobayashi, T. Matsuo,
S. Miwa, Y. Otani, and S. Nakatsuji
aRIKEN CEMS

Observation of Spontaneous X-ray
Magnetic Circular Dichroism in the
Chiral Antiferromagnet Mn3Sn Thin Film
Miwa and Nakatsuji Groups

Fig. 1. (a) Crystal and spin structures of Mn3Sn. The non-collinear spin
structure consisting of six Mn magnetic moments (yellow and green
arrows) can be viewed as the ferroic ordering of a magnetic octupole(purple arrow). (b) The schematic of the electrical switching in Mn3Sn/
W memory devices. Two different states of Mn3Sn, “0” and “1” states,
can be determined by the polarity of applying current. (c) Enhancementof the switching Hall voltage in the Mn3Sn/W bilayer is three times
larger than the value observed in the previous Ru/Mn3Sn/W multilayer.

Antiferromagnets without a net magnetic moment areinvisible to many magnetic probes, including X-ray magnetic
circular dichroism (XMCD). Recently, it was proposedthat the inverse triangular spin (ITS) structure of a noncollinear antiferromagnet can give rise to finite XMCD signals
through the non-vanishing magnetic dipole term T, which isprobed by XMCD, even without net magnetization [1,2], as
schematically shown in Fig. 1(a).
A chiral antiferromagnet Mn3Sn with the D019 structure[3] is an ideal material for observing the XMCD signals
originating from the ITS structure (also referred to as theferroic order of cluster magnetic octupoles) because thedirection of the ITS structure or the octupole polarization canbe controlled by external magnetic fields through finite spin
canting.
In the present study, to test if finite XMCD signals areobservable in the ITS structure, we grew a Mn3Sn epitaxial

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17

Fig. 1. (a) Inverse triangular spin (S) structure with magnetic dipole
term (T). (b) Thin film structure.

thin film and performed XMCD measurements on it. The
sample structure was MgO(110) substrate/W (15 nm)/
Mn3Sn (40 nm)/MgO (3 nm), as schematically shown in
Fig. 1(b). X-ray absorption spectroscopy (XAS) and XMCD
measurements were performed on the BL-16A2 beamline
at the Photon Factory. Measurement temperature was room
temperature. The incident x-ray and magnetic field directions
were perpendicular to the sample surface so that the octupole
polarization becomes parallel to the incident x-rays.
Figure 2(a) shows a typical XAS spectrum of the Mn3Sn
thin film. The XAS spectral line shape did not depend on
the magnetic field strength or direction. The XMCD spectra
obtained with magnetic fields of 0.1 T and 5 T are shownby the red and blue curves in Fig. 2(b), respectively. The
spectral line shapes significantly differ from each other:
The spectrum obtained with 0.1 T shows a strong positive
pre-edge peak, denoted by α in Fig. 2(b), while the spectrum
obtained with 5 T shows an intense negative peak at the XAS
peak position, denoted by β in Fig. 2(b).
The XMCD spectra are expected to consist of thespin-canting component, which develops with increasing
magnetic fields, and the field independent octupole
component. Because the peak β develops with increasing
magnetic fields, it most likely originates from spin canting.
Indeed, if the spectrum taken with 0.1 T is subtracted fromthe spectrum taken with 5 T, a broad featureless XMCD

Fig. 2. (a) Typical XAS spectrum of the Mn3Sn thin film. (b) XMCD
spectra taken with magnetic fields (H) of 0.1 T (red curve) and 5 T(blue curve). The spin canting component (green curve) is extracted bysubtracting the 0.1 T spectrum from the 5 T spectrum.

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ISSP Activity Report 2021

spectrum without peak α is obtained, as shown by thegreen curve in Fig. 2(b). This broad spectrum resembles
the XMCD spectra of metallic systems, suggesting that itreflects the spin component. This argument also indicatesthat the spectrum taken with 0.1 T, which shows multiple
sharp peaks, predominantly reflects the octupole component
because it is independent of magnetic fields.
In summary, we demonstrated that the ITS structure cangive rise to finite XMCD signals by performing XMCD
measurements on a Mn3Sn epitaxial thin film [4]. Thisfinding should allow one to quantitatively evaluate themagnitude of the octupole polarization and spin canting,which would be difficult otherwise. The present results
should also lead to the resolution of antiferromagnetic
domains and antiferromagnetic domain walls using thescanning XMCD technique.
References[1] Y. Yamasaki, H. Nakao, and T.-h. Arima, J. Phys. Soc. Jpn 89,
083703 (2020).
[2] N. Sasabe, M. Kimata, and T. Nakamura, Phys. Rev. Lett. 126,
157402 (2021).
[3] S. Nakatsuji, N. Kiyohara, and T. Higo, Nature 527, 212 (2015).
[4] S. Sakamoto, T. Higo, M. Shiga, K. Amemiya, S. Nakatsuji, and S.
Miwa, Phys. Rev. B 104, 134431 (2021).
Authors
S. Sakamoto, T. Higo, M. Shiga, K. Amemiyaa, S. Nakatsuji, and S.
Miwa
aKEK

Electron-Correlation-Driven
Enhancement of Orbital Polarization
at the Fe/MgO Interface
Miwa Group
Utilizing electron spins in electronic devices is a central
theme in the field of spintronics. The giant tunneling magnetoresistance (TMR) effect and interfacial perpendicularmagnetic anisotropy (PMA) in Fe/MgO-based multilayer
systems are the foundation of such spintronics applications.
For both effects, the atoms located at the interface play
crucial roles. That is, the interfacial spin and orbital polarization determines TMR and PMA, respectively. Therefore, it isessential to understand how Fe atoms behave at the interface
with MgO by characterizing their spin and orbital magnetic
moments to further improve TMR and PMA.
For such a purpose, we performed depth-resolved x-ray
magnetic circular dichroism (XMCD) measurements on
the V/Fe/MgO trilayer grown on an MgO(001) substrate(Fig. 1(a)) The trilayer showed PMA, as confirmed bymagneto-optical Kerr effect measurements with out-ofplane magnetic fields (Fig. 1(b)). The principle of the depthresolved XMCD [1] is shown in Fig. 1(c). Here, photoelectrons emitted at different angles were detected separately.
Because electrons have a finite inelastic mean free path λe
in solids, the probability of inelastic electrons at depth z
escaping into the vacuum depends on the electron emission
angle θd. Therefore, detecting electrons as a function of θdyields probing depth (λeff) dependent XMCD spectra andhence the depth profiles of the spin and orbital magnetic
moments. The depth-resolved XMCD measurements wereconducted at the beamline BL-7A at the Photon Factory.
The obtained spin and orbital magnetic moments wereplotted against the detection angles in Figs. 2(a) and 2(b),Fig. 1. (a) Sample structure. (b) Out-of-plane magnetization curvemeasured based on the magneto-optical Kerr effect. (c) Schematic illustration of experimental setup and principle of depth-resolved XMCD
technique, where probing depth (λeff) depends on the electron emission
angle (θd).

respectively. Both the spin and orbital magnetic moments
increased as the detection angles decreased, suggesting thatthey enhanced near the Fe/MgO interface. By performing
curve fitting, we estimated the magnetic moment of eachlayer, as shown by the solid staircase-like lines in Figs.
2(c) and 2(d). The obtained depth profiles show interfacial
enhancement of the Fe orbital and spin magnetic moments
at the Fe/MgO interface. By contrast, the spin magnetic
moment diminished at the Fe/V interface.
To interpret the experimental observations, we performed
first-principles calculations. Figure 2(e) shows the usedsupercell. The calculated magnetic moments are shown by
the gray shaded bars in Figs. 2(c) and 2(d). Although thecalculations reproduced interfacial enhancement of the spin
magnetic moments, it significantly underestimated the orbital
counterpart. To resolve this discrepancy, we performed thecalculations with orbital polarization (OP) correction. This
correction accounts for the electron–electron correlation

Fig. 2. Detection-angle-dependent (a) spin magnetic moment mspin, (b)orbital magnetic moment morb. Solid curves represent the fit. Depth
profiles of (c) spin magnetic moment and (d) orbital magnetic moment.
Staircase-like lines with open markers represent experimental data;
black bars and gray shaded bars represent results of first-principles
calculations with and without orbital polarization (OP) correction,
respectively. (e) Supercell used for calculations.

by satisfying Hund’s second rule and provide an accurate
description of orbital magnetic moments and PMA. The OP
correction calculations considerably increased the orbital
magnetic moment at the Fe/MgO interface close to theexperimental value, as shown by the black bars in Figs. 2(c)and 2(d). This agreement suggests that the electron–electron
correlation, probably strengthened by interfacial electron
localization, enhance the orbital magnetic moment at the Fe/
MgO interface and the PMA.
The present findings [2] should also apply to other ferromagnetic metal/oxide interfaces, including CoFeB/MgO
systems, as enhanced electron−electron correlation is genericto such interfaces with the abrupt termination of metallic
bonds. Furthermore, this study provides insights into theimportance of considering electron−electron correlation,
which have often been disregarded in spintronics, to understand various phenomena that emerge at interfaces.
References[1] K. Amemiya, Phys. Chem. Chem. Phys. 14, 10477 (2012).
[2] S. Sakamoto, M. Tsujikawa, M. Shirai, K. Amemiya, and S. Miwa,
ACS Appl. Electron. Mater. 4, 1794 (2022).
Authors
S. Sakamoto, M. Tsujikawaa, M. Shiraia, K. Amemiyab, and S. Miwa
aTohoku University
bKEK

Mott-Insulator-Like Bose-Einstein
Condensation in a Tight-Binding System
of Interacting Bosons with a Flat Band
Kawashima GroupWe considered a Bose-Hubbard model on a two-dimensional lattice. We showed that the model parameters (thelattice structure, the hopping constants, and the chemical
potential) can be tuned in such a way that the ground state is
generated by applying, to the vacuum, N creation operatorsof locally-defined quasi-particles, where N is proportional to
the total number of lattice points. The resulting model has afree parameter β that controls the degree of quantum fluctuation; β = 0 for no fluctuation and β = 1/2 for the maximum
fluctuation. We carried out Monte Carlo simulation of thismodel at zero temperature, and discovered that the model
undergoes a quantum phase transition when we change thisparameter. While the system is 2+1 dimensional, the newphase transition exhibits the characteristics of 2 dimensions,
i.e., the Kosterlitz-Thouless phase transition analogous to theclassical XY model in 2 dimensions. Accordingly, the large
β phase is the quasi Bose-Einstein condensation phase.
The above-mentioned ground state is expressed exactly
as a tensor network with the bond dimension 2. Tracing out
this tensor network is equivalent to calculating the partition function of some classical loop gas model. This is why
the quantum criticality exhibits the purely 2-dimensional
characteristics. It also allows us to construct a Monte Carloalgorithm for efficient sampling from the space of classicaloccupation-number configurations. In other words, we canstochastically trace out the tensor network to obtain various
physical quantities of interest, such as the static structure
factors and the helicity modulus.
The lattice is generated from the square lattice by duplicating each bond into p copies and introducing an additionalsite in the middle of each copy. (Fig. 1) The direct hopping

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Double Superconducting Domeand Triple Enhancement of Tc
in the Kagome Superconductor CsV3Sb5
under High Pressure
Uwatoko Group

Fig. 1. The lattice considered (p=1). Within each cluster specified by x
or u, a tuned hopping between the black and the white sites is defined.

Fig. 2. The static structure factor S (top) and the helicity modulus(bottom) as functions of β for p=2. The horizontal line in the bottom
panel indicates the universal jump 2/π, the thermodynamic value
characteristic to the KT transition point.

is allowed only within local clusters labelled by either
x or u. While bosons interact with each other, the model
is constructed in such a way that the dispersion of a single
particle has a flat band if influence of the other paricles could
be neglected. The result of the Monte Carlo simulation are
shown in Fig. 2. The static structure factor diverges aroundβ = 0.2 and, at the same time, the helicity modulus jumps
from 0 to 2/π, the universal value characteristic to the KT
transition.

The newly discovered kagome metals AV3Sb5 (A = K,
Rb, Cs) have aroused tremendous research interest as a novel
platform to study the interplay between nontrivial band
topology, superconductivity (SC) and charge-density-wave(CDW) order [1-4]. At ambient conditions, these materials
crystallize into a layered structure with hexagonal symmetry(space group P6/mmm), inset of Fig. 1(a), consisting of A
layer and V-Sb slab stacked alternatively along the c-axis.
The most prominent feature of this structure is the presenceof quasi-2D ideal kagome layers of V ions coordinated by
Sb. These compounds are metallic and enter a superconducting ground state below Tc = 0.93, 0.92, and 2.5 K for A=
K, Rb, and Cs [2-4], respectively. In the normal state, theirtransport and magnetic properties exhibit a clear anomaly
at T* = 78, 104, and 94 K, respectively, due to the formation of CDW-like order as revealed by the x-ray diffraction
and scanning tunning microscopy measurements [2-4]. The
charge order in KV3Sb5 has been found to display a chiralanisotropy [5], which can lead to giant anomalous Hall effectin the absence of magnetic order or local moments [6,7].
It was also argued as a strong precursor of unconventional
SC. Moreover, angle-resolved photoemission spectroscopy
measurements and density-functional-theory calculations
have characterized their normal state as a Z2 topologicalmetal with multiple Dirac nodal points near the Fermi level[1,4], consistent with the observations of Shubnikov-de Haas
quantum oscillations and small Fermi surfaces (FSs) withlow effective mass in RbV3Sb5 [3].
At present, the topologically related phenomena and SC
have been actively studied in these AV3Sb5 compounds, but

Reference[1] H. Katsura, N. Kawashima, S. Morita, A. Tanaka, and H. Tasaki,
Phys. Rev. Research, 3 033190 (2021).
Authors
H. Katsuraa, N. Kawashima, S. Morita, A. Tanakab, and H. Tasakic
aThe University of TokyobNational Institute of Technology
cGakushuin University

Fig. 1. Temperature-pressure phase diagram of CsV3Sb5. Pressure
dependence of the transition temperatures for (a) the CDW-like orderand (b) superconductivity. The color scale in (a) represents the sign ofΔ(dρ/dT) around T*, which changes sign near Pc1 due to the modification of CDW order. Inset of (a) shows the crystal structure of CsV3Sb5.
The yellow region between Pc1 and Pc2 in (b) corresponds to a
relatively broad superconducting transition.

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the rich physics related to the electron correlation, especiallythe relationship between the intertwined electronic orders,has been barely revealed. In this regard, it is interesting tounveil the correlation between the CDW-like order and SC
commonly observed in these AV3Sb5 materials. Thus, wehave chosen to study CsV3Sb5 with the highest Tc among
this series of compounds by applying a high-pressure
approach, which has been widely used in disentangling thecompeting electronic orders of strongly correlated metals.
The interplay between CDW and SC in CsV3Sb5 was studied
via measurements of resistivity, DC and AC magnetic
susceptibility under various pressures up to 6.6 GPa [8]. We
find that the CDW transition decreases with pressure andexperience a subtle modification at Pc1 ≈ 0.6-0.9 GPa before
it vanishes completely at Pc2 ≈ 2 GPa. Correspondingly,
Tc(P) displays an unusual M-shaped double dome with two
maxima around Pc1 and Pc2, respectively, leading to a tripledenhancement of Tc to about 8 K at 2 GPa. The obtained
temperature-pressure phase diagram, Fig. 1, resembles thoseof many unconventional superconductors, illustrating an
intimated competition between CDW-like order and SC.
The competition is found to be particularly strong for theintermediate pressure range Pc1 ≤ P ≤ Pc2 as evidenced by
the broad superconducting transition and reduced superconducting volume fraction. The modification of CDW orderaround Pc1 has been discussed based on the band structure
calculations. Our work not only demonstrates the potential
to raise Tc of the V-based kagome superconductors, butalso offers more insights into the rich physics related tothe electron correlations in this novel family of topologicalkagome metals.
References[1] B. R. Ortiz, L. C. Gomes, J. R. Morey et al., Phys. Rev. Mater. 3,
094407 (2019).
[2] B. R. Ortiz, E. Kenney, P.M. Sarte et al., Phys. Rev. Mater. 5,034801 (2021).
[3] Q.W. Yin, Z. J. Tu, C. S. Gong et al., Chin. Phys. Lett. 38, 037403(2021).
[4] B. R. Ortiz, S. M. L. Teicher, Y. Hu et al., Phys. Rev. Lett. 125,
247002 (2020).
[5] Y. X. Jiang, J. X. Yin, M. M. Denner et al., Nature Mater. 20, 1353
(2021).
[6] S. Y. Yang, Y. J. Wang, B. R. Ortiz et al., Sci. Adv. 6, eabb6003(2020).
[7] E. M. Kenney, B. R. Ortiz, C. N. Wang et al., J. Phys. Condens.
Matter. 33, 235801 (2021).

[8] K. Y. Chen, N. N. Wang, Q. W. Yin et al., Phys. Rev. Lett. 126,
247001 (2021).

Authors
K. Y. Chena, N. N. Wanga, Q. W. Yinb, Y. H. Gua, K. Jianga, Z. J. Tub,
C. S. Gongb, Y. Uwatoko, J. P. Suna, H. C. Leib, J. P. Hua, and J.-G.
ChengaaInstitute of Physics, Chinese Academy of SciencebRenmin University of China

Nearly Room Temperature
Ferromagnetism in a Pressure-Induced
Correlated Metallic State of van der
Waals Insulator CrGeTe3
Uwatoko Group
Discovery of two-dimensional (2D) magnetism in vander Waals (vdW) materials have unfurled diverse range ofpossibilities for development of novel spintronics, multiferroic and quantum computing devices using atomicallyFig. 1. (a) Single layer of CrGeTe3 illustrating the honeycomb networkof edge sharing CrTe6 octahedra. In case of CrX3, the place of Ge-Ge
dimers remains vacant. (b) Crystalline electric field splitting of Cr 3d
orbitals into t2g - and eg -manifolds. ∆ is the energy difference between
t2g- and eg levels. JTeis the Hund’s coupling energy at Te site. (c)H
Schematic picture of indirect superexchange FM interaction between Cr
eg-orbitals via two Te p-orbitals. tpd(tp'd')is the virtual hopping betweeneg (e'g) and p (p') orbitals. θ is the geometrical Cr-Te-Cr bond angle.

thin materials [1]. Among the vast pool of vdW materials,
CrGeTe3 and CrX3 (X = Cl, Br, I) are Mott insulators witha charge gap, thus facilitating suitable platforms to exploit
both charge and spin degrees of freedom. At low temperature, these insulators share a common layered rhombohedral R−
3 -crystal structure held together by weak vdW forcesalong the c-axis. Each single layer consists of a honeycomb
network of edge sharing octahedra formed by a central Cr
atom bonded to six ligand atoms (Te or X), as illustrated inFig. 1(a) for CrGeTe3.
The crystalline field effect ensuing from this octahedra
splits the Cr-3d orbitals into t2g - and eg-manifolds [Fig.1(b)].
The onsite Coulomb repulsion localizes the t2g-electrons
driving the system into an insulating state significantly well
above TC. Although, a direct antiferromagnetic exchangeinteraction exists between t2g-electrons, thermal fluctuation inherent to 2D suppress the long-range magnetic order.
The spin orbit coupling (SOC) emanating through thecovalent bond between ligand p and Cr-eg orbital generates
the magnetocrystalline anisotropy energy to counteract thethermal fluctuation. Below TC, the superexchange interaction
between Cr-eg electrons via two different ligand p-orbitals,
as schematically portrayed in Fig.1(c), benefits from thedistortion of CrTe6 octahedra and the Hund’s energy gain at
the ligand Te (or X) site to stabilize the FM order. The correlation between t2g-electrons also move up the ligand p bands
close to Fermi level, thus opening a band gap between the Crd conduction band and the ligand p valence band indicating acharge transfer type Mott behaviour.
However, one drawback for the practical technologicalapplication is the low Curie temperature, TC, mostly below
liquid nitrogen temperature. For exploitation of these attributes, it is essential to realize this novel FM state at or close
to room temperature. Recently, TC of CrGeTe3 has beenraised around 200 K either by intercalating large organic
ions into single crystals [2] or using sophisticated process
like electrochemical doping to field effect transistor devices[3]. Although, these results are promising, such filling
control methods lead to strong charge inhomogeneity as
well as structural and chemical defects, including creation ofmagnetic impurity, unfavourable for device application.
On the other hand, application of pressure is advantageous, which not only controls the bandwidth but also thespin exchange pathways via subtle modification of bondlength and angle between atoms avoiding the complicationof disorder. Here, for the first-time we show the evidenceof nearly room temperature FM in CrGeTe3 bulk single
crystals with application of pressure [4]. Using highly sensitive dc magnetic susceptibility and resistivity measurement
under high quality hydrostatic pressure, we found that TC of
CrGeTe3 exceeds 250 K above 9.1 GPa. In Fig. 2, we present

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21

Fig. 2. Pressure temperature phase diagram of CrGeTe3. Color scaleχ
represents the magnitude of ρab. θCW and TC respectively are theCurie-Weiss temperature and Curie temperature, estimated fromρ
magnetic susceptibility. TC and TFL are Curie temperature and Fermi
liquid temperature determined from ρab.

the pressure-temperature phase diagram of CrGeTe3 which
uncovers a rare example of bandwidth-controlled insulatormetal transition (IMT) in a vdW materials. Moreover, theremarkable absence of accompanied structural transitionand spin crossover involving magnetic to non-magnetic
states across IMT, clearly indicates the pressure drivenchanges of electronic property are purely electronic in origin.
Furthermore, these findings show that electronic propertyof CrGeTe3 can be switched much more responsively using
external perturbation, such as strain, doping compared toother vdW insulators.
References[1] C. Gong et al., Nature, 546, 265 (2017).
[2] N. Wang et al., J. Am. Chem. Soc, 141, 17166 (2019).
[3] I. A. Verzhbitskiy et al., Nat. Electron., 3, 460 (2020).
[4] Dilip Bhoi, J. Gouchi, N. Hiraoka, Y. Zhang, N. Ogita, T.
Hasegawa, K. Kitagawa, H. Takagi, K. H. Kim, and Y. Uwatoko, Phys.
Rev. Lett. 127, 217203 (2021)
Authors
D. Bhoi, J. Gouchi, N. Hiraokaa, Y. Zhangb, N. Ogitac, T. Hasegawac,
K. Kitagawaa, H. Takagia,d,e, K. H. Kimf,g, and Y. Uwatoko
aThe University of Tokyo
bSoutheast University
cHiroshima University
dInstitute for Functional Matter and Quantum Technologies, Universityof Stuttgart
eMax Planck Institute for Solid State Research
fCeNSCMR, Seoul National University
gInstitute of Applied Physics, Seoul National University

ature is expected to occur due to weakly screened Coulombinteractions in narrow gap semiconductors and semimetals.
In that case, the system becomes an insulator known as an
excitonic insulator. The excitonic insulator was theoretically
proposed more than 50 years ago, however, experimental
facts for excitonic state are far from conclusive.
A layered chalcogenide Ta 2NiSe 5 located near thesemiconductor-semimetal boundary has in recent years
attracted attention as a promising candidate for the excitonic
insulator. At ambient pressure, semiconductor-to-insulatortransition occurs at Tc ~ 328 K, accompanied with a structural phase transition from high-temperature orthorhombic
to low-temperature monoclinic. The transition at Tc has
been discussed to be the excitonic transition as manifestedby the characteristic flattening of the valence band [1].
Furthermore, the control of energy gap using a solid-solution
Ta2Ni(Se1−xSx)5 and an application of moderate pressure
reproduce the canonical phase diagram for the excitonic
insulator [2]. Here we show a high-pressure phase diagramof Ta2NiSe5 covering the whole range from semiconducting
to semimetallic region for the first time, and discovered
pressure-induced superconductivity in the semimetallic
phase [3].
Figure 1 depicts a pressure-temperature phase diagramof Ta2NiSe5 based on bulk measurements under pressure.
Ta2NiSe5 exhibits a first-order structural transition underpressure at Ps ~ 3 GPa, which is accompanied by the change
from an almost zero-gap semiconductor to a semimetal.
In the pressure-induced semimetallic phase, there appears
a transition to another semimetal with a partial-gap at T *,accompanied with a lattice distortion analogous to that
occurs at the excitonic transition at low-pressure semiconducting phase. With increasing pressure, T * is suppressed
and reaches to zero temperature around Pc ~ 8 GPa. A
dome-like superconducting phase with a maximum Tsc ~1.2 K emerges around Pc. Since the Coulomb interactions
between electrons and holes should be screened out substantially due to the increased carrier density, applying pressurechanges the character of the gap from excitonic dominant tohybridization gap dominant on increasing the band overlap.
Our results evidence the presence of the electron-latticecoupling may be one of the key ingredients for the occurrence of superconductivity and the excitonic transition in the
low-pressure phase.

Pressure-Induced Superconductivity
in the Excitonic Insulator
Candidate Ta2NiSe5
Uwatoko Group
Superconductor hosts a condensate of electron pairs(Cooper pairs), which can conduct electricity without any
loss of energy. In conventional superconductivity, an attractive interaction mediated by lattice vibrations can leadelectrons to form pairs. The bound states through attractive
Coulomb attraction between electrons and holes, similar to
Cooper pairs in superconductivity, are called excitons. A
spontaneous condensation of excitons with lowering temper-

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Fig. 1. Temperature-pressure phase diagram of Ta2NiSe5 obtained frombulk measurements under pressure. The lines are guides for the eye.

References[1]Y. Wakisaka, T. Sudayama, K. Takubo, T. Mizokawa, M. Arita, H.
Namatame, M. Taniguchi, N. Katayama, M. Nohara, and H. Takagi,
Phys. Rev. Lett. 103, 026402 (2009).
[2]Y. F. Lu, H. Kono, T. I. Larkin, A. W. Rost, T. Takayama, A. V.
Boris, B. Keimer, and H. Takagi, Nat. Commun. 8, 14408 (2017).
[3]K. Matsubayashi, H. Okamura, T. Mizokawa, N. Katayama, A.
Nakano, H. Sawa, T. Kaneko, T. Toriyama, T. Konishi, Y. Ohta, H.
Arima, R. Yamanaka, A. Hisada, T. Okada, Y. Ikemoto, T. Moriwaki,
K. Munakata, A. Nakao, M. Nohara, Y. Lu, H. Takagi, and Y. Uwatoko,
J. Phys. Soc. Jpn. 90, 074706 (2021).
Authors
K. Matsubayashia, H. Okamurab, T. Mizokawac, N. Katayamad, A.
Nakanod, H. Sawad, T. Kanekoe, T. Toriyamae, T. Konishie, Y. Ohtae,
H. Arimaa, R. Yamanaka, A. Hisadab, T. Okada, Y. Ikemotof, T.
Moriwakif, K. Munakatag, A. Nakaog, M. Noharah, Y. Lu i, H. Takagii,
and Y. Uwatoko
aThe University of Electro-Communications
bTokushima University
cWaseda University
dNagoya University
eChiba University
fJASRIgCROSS
hHiroshima University
iThe University of Tokyo

Difference in Curvature Sensingof Isotropic and Anisotropic
Curvature-Inducing Proteins
Noguchi GroupIn living cells, biomembrane shapes are controlled byvarious curvature-inducing proteins. We have studied thebinding of these proteins using mean-field theories. Clathrin
and coat protein complexes bend membranes in a laterally
isotropic manner and generate spherical buds. In contrast,
Bin/Amphiphysin/Rvs (BAR) superfamily proteins bend themembrane along their BAR domain axes and generate cylindrical membrane tubes. The former and latter proteins can bemodeled as laterally isotropic objects and anisotropic objectsof a crescent elliptic shape, respectively.
For isotropic proteins, we derived the free energy,
including the Gaussian curvature and area expansion by theprotein insertion [1]. Then, we investigated the formationof spherical buds [1] and binding onto a tethered vesicle[2]. Experimentally, a narrow membrane tube (tether) is
elongated from a spherical vesicle by an external force
imposed by a micropipette and optical tweezers. A first-ordertransition occurs between a small number of large buds and alarge number of small buds with increasing chemical potential of protein binding [2]. For the tethered vesicle, interestingly, a first-order transition occurs twice between low andhigh protein densities in the tube. The force-dependence
curves of the protein density in the membrane tube and thetube curvature are reflection symmetric and point symmetric,
respectively, from the force point, in which the tube curvature matches the protein (sensing) curvature (see Figs. 1(a)and (b)) [2]. This theory reproduces the meshless membrane
simulation results of the homogeneous phases very well.
In addition, beaded-necklace-like tubes with microphaseseparation were found in the simulation.
For anisotropic proteins, an orientational-dependentexcluded volume interaction is included in the free energy.
We studied binding onto membrane tubes [3]. The proteins
exhibit a second-order or first-order nematic transition withincreasing protein density for intermediate and small radii ofFig. 1. Binding of proteins onto tubular membranes. External force fex
dependence of protein density φ and tube radius Rcy. (a),(b) Isotropic
proteins with sensing curvature Cs. (c),(d) Anisotropic proteins with aspontaneous curvature Cp along proteins axis. With increasing binding
chemical potential m, more proteins are bound.

the membrane tube, respectively. The tube curvatures for the
maximum protein binding (sensing) and orientational order
are differently varied by the protein density and rigidity. As
the external force along the tube axis increases, a first-ordertransition from a large tube radius with low protein density
to a small radius with high density occurs only once, andsubsequently, the protein orientation tilts to the tube-axis
direction (see Figs. 1 (c) and (d)). The density-dependent
sensing curvature and the number of transitions are characteristics due to the anisotropic bending energy. In contrast,
each isotropic protein has a constant sensing curvature. Thisdensity-dependent sensing curvature has been measured in
the experiment of BAR proteins. This theory quantitatively
reproduces the results of meshless membrane simulation for
short proteins. For long proteins, the formation of protein
clusters generates a quantitative deviation from the theory,
although qualitative agreements still hold.
The present theories can be used to estimate the bending
rigidity and curvature of bound proteins in experiments andatomistic simulations. These mechanical parameters are keys
to quantitatively understand the curvature sensing and generation of proteins.
References[1] H. Noguchi, Phys. Rev. E 104, 014410 (2021).
[2] H. Noguchi, Soft Matter 17, 10469 (2021).

[3] H. Noguchi, C. Tozzi, and M. Arroyo, Soft Matter 18, 3384
(2022).
AuthorH. Noguchi

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Structure of Glass-Forming Molecular
Liquids under High Pressure
Yamamuro Group
Glass transition is one of the most important unsolved
problems in condensed matter physics. The history of theglass transition study might start when Giauque found aheat capacity jump of glycerol in 1923 [1]. After that many
people have studied the mechanism of the glass transition
both through experimental and theoretical approaches. Highpressure studies have played important roles in the glasstransition research since they provide direct information for
the validity of the two important concepts of the mechanism of the glass transition; i.e., the entropy theory andfree-volume theory. At present, the entropy theory, particularly Adam-Gibbs (AG) theory [2], is dominant to explain
thermodynamic properties of the glass transition [3] and thepressure dependence of the glass transition temperature (Tg)[4]. An extended version of the AG theory, random firstorder transition (RFOT) theory [5], can also explain the
non-linear dynamics of the glass transition. Molecular liquids
are important materials in the glass transition research since
they are similar to the systems treated in theoretical andcomputer simulation studies. We are interested in van der
Waals molecules which are condensed only by the van der
Waals interaction, and hydrogen-bonding molecules whichhave network structures formed by intermolecular hydrogenbonds.
Recently, we have measured X-ray diffraction (XRD)
data of toluene (C 6H 5CH 3, T g = 117 K) and glycerol[(CH 2(OH)CH(OH)CH 2(OH), T g = 187 K] under highpressures (toluene: < 0.9 GPa, glycerol: < 3.6 GPa) at
RT. This work is a collaboration with Prof. Yoshio Kono
(Ehime Univ.). We used a Paris-Edinburg cell and BL37XU,
SPring-8, on which very precise horizontal focusing andcollimation are available.
Figure 1 shows the structure factors of toluene at 0.9
GPa. The result of the MD simulation (AMBER force field,
0.2 ns, 500 molecules) is also shown. The MD simulation
well reproduces the experimental data. Good agreement was
obtained also for the data at 0 and 0.4 GPa. Figure 2 shows
the pair distribution functions g(r) of aromatic (benzenering) carbons obtained by the MD simulations. As the density

Fig. 1. Structure factor of toluene at 0.9 GPa.

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(pressure) increases, three peaks between 3 and 6 Å become
more prominent. These peaks are known to be due to theT-type pair correlation as shown in the inset. It is noteworthy
that this trend is the same as the cooling effect at ambientpressure. Hence, we concluded that the AG concept is valid
also for the glass transition by pressurization.
On the other hand, the structure factor of glycerol
cannot be reproduced by the MD simulation using thepotential parameters at ambient pressure. Therefore, we
performed ab initio (Car-Parrinello) MD simulations usinga smaller system (50 molecules) and shorter simulation time
(0.15 ps) to determine the short-range structure, and thenadjusted the Lenard-Jones parameters as a function ofpressure so as to reproduce the g(r) obtained by the ab initio
MD. Figure 3 shows the structure factors using the adjusted
potential parameters. Good agreement is obtained between
the experimental and MD data. Form the obtained structure,
we found that the molecular structure is deformed to be morecompact keeping hydrogen bonds. The C-O intermolecular
correlation is also important under high pressure. The present
conclusion is quite different from the common sense that

Fig. 2. Pair distribution function for aromatic carbon atoms of toluene.
Preferred pair correlation is shown by inset.

Fig. 3. Structure factor of glycerol under high pressure.

hydrogen bonds are just broken by pressurization. A neutron
diffraction experiment is under planning to determine theposition of the hydrogen atoms and make clearer discussion
on the competing hydrogen-bond and van der Waals interactions under high pressure.
References[1] G. E. Gibson and W. F. Giauque, J. Am. Chem. Soc. 40, 93 (1923).
[2] G. Adam and J. H. Gibbs, J. Chem. Phys. 43, 139 (1965).
[3] S. Tatsumi et al., Phys. Rev. Lett. 109, 045701 (2012).
[4] O. Yamamuro et al., J. Non-Cryst. Solids, 183, 144 (1995).
[5] T. R. Kirkpatrick et al., Phys. Rev. A 40, 1045 (1989).
Authors
Y. Zhao, H. Akiba, N. Kondoa, Y. Konoa, and O. Yamamuro
aEhime University

Nontrivial Temperature Dependenceof Magnetic Anisotropy
in Multiferroics Ba2MnGe2O7
Masuda groupSpin-driven multiferroics have been extensively studied
since the discovery of an enhanced magnetoelectric effectin TbMnO3. Through spin-orbit coupling (SOC), a spinorder induces a change of charge distribution, leading toemergence of electric polarization. The microscopic mechanisms of the multiferroics are categorized into three types:
the spin current, the exchange striction, and the spin dependent d-p hybridization. A notable feature of the third one isthat hybridized d and p orbitals of magnetic ion and ligand
are modulated by spin states via SOC, and this induces
an electric polarization. The relation between the electric
polarization P and the spin moment S is locally described.
The mechanism has been identified in several compounds
including åkermanite compounds Ba2CoGe2O7. Since thedirection of the local spin moment determines the directionof the electric polarization, magnetic anisotropy plays a keyrole in forming multiferroic structure, i.e., the simultaneous
structures of the spin and polarization. The magnitude of
the anisotropy gives the energy scale for the control of themagnetism by the electric field as well as magnetic field.
Although the temperature (T) dependence of the anisotropy
gap in magnon spectrum in a conventional magnet scales asa power of the sublattice magnetic moment, it may not be
the case for the multiferroics. The change of the polarization
with T affects the spin-interaction parameters through the
d-p hybridization, which can lead to a nontrivial behavior
in T dependence of the anisotropy and a low-energy spin
dynamics. Here we study spin dynamics on a squarelattice antiferromagnet Ba2MnGe2O7 known as multiferroic
compound by using a state-of-art spectrometer with ultrahigh resolution.
Figure 1(a) shows the INS spectrum measured at 0.05 K.
Two dispersive modes with the boundary energy of 0.55
meV and with gaps ~ 0.05 meV and ~ 0.1 meV are clearlyobserved. The gap of the low-energy (T1) mode is ascribedto easy-axis anisotropy in the square lattice by spin
nematic interaction/electric polarization interaction;
N =
XY XY
Z Z
∑i,j JN Oi Oj = ∑i,j JP Pi Pj , where JN is nematic interaction, O XY is Stevens operator, and JP is an effective interaction between the electric polarizations. Anisotropy gap of thehigh-energy (T2) mode is ascribed to easy-plane anisotropy
by a single-ion anisotropy. We find that the former gap is

Fig. 1. Inelastic neutron scattering (INS) spectra. (a) False color plotof the INS spectrum measured at 0.05 K projected onto the ħω - (1, k,1/2) plane. The spectrum is integrated in the range of 0.9 ≤ h ≤ 1.1 and
0.45 ≤ l ≤ 0.55. White solid curves are calculated magnon-dispersions.
(b)-(e) The INS spectra focused on the low-energy range measuredat (b) 0.05 K, (c) 0.9 K, (d) 1.8 K and (e) 2.5 K. White solid curves
are calculated dispersions. (f) T dependences of ∆SWT
(black circles),
1
electric polarization P (orange curve from Ref. [1]) and the second
power of the sublattice moment (light green triangles).

drastically suppressed with the increase of T, while the latter
gap is moderately suppressed as shown in Figs. 1(b)-1(e). We
also find that JN is strongly dependent on T.
T dependences of the easy-axis anisotropy ∆SWT
, a scaled
1electric polarization P, and the second power of the scaled
sublattice moment (gμBS)2 are shown in Fig. 1(f). We findthat ∆1SWT does not scale as (gμBS)2, but is rather consistent
with the temperature dependence of P. Indeed, our spin-wave
calculation including the spin nematic term
N exhibitsthat the formula of the anisotropy gap is proportional to P.
Furthermore, the calculation shows that the drastic T dependence of JN results from the change of orbital with T; themodification of the hybridized orbitals of Mn2+ and O2−ions with T leads to a small change of the energy, which
is negligible in highly anisotropic system but is enhancedin the nearly isotropic system such as the symmetric halffilled shell of Mn2+ ion, and it is probed as the change of JN
thorough SOC. We, thus, find a characteristic quasiparticle ofthe multiferroics originating from the hybridization of spinand orbital momenta.
References[1] H. Murakawa, Y. Onose, S. Miyahara, N. Furukawa, and Y. Tokura,Phys. Rev. B 85, 174106 (2012).
[2] S. Hasegawa, S. Hayashida, S. Asai, M. Matsuura, I. Zaliznyak, andT. Masuda, Phys. Rev. Research 3, L032023 (2021).
Authors
S. Hasegawa, S. Hayashida, S. Asai, M. Matsuuraa, I. Zaliznyakb, andT. Masuda
aCROSSbBrookhaven National Laboratory

Polarized Neutron Scattering Studyon a Centrosymmetric Skyrmion
Host Gd2PdSi3
Nakajima Group
Gadolinium based intermetallic compounds have been
intensively investigated since the discovery of magnetic
skyrmion lattice, which is topologically-nontrivial vortexlike spin texture, with the large topological Hall effect in a

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triangular lattice itinerant magnet Gd2PdSi3 [1]. Althoughmagnetic skyrmions were discovered in chiral ferromagnets
such as MnSi [2], the recent study on Gd2PdSi3 has demonstrated that centrosymmetric magnets can also host magnetic
skyrmions owing to coupling between local magnetic
moments and conduction electrons. Subsequent studies on abreathing kagome system Gd3Ru4Al12 [3] and a tetragonal
magnet GdRu2Si2 [4] also reported emergence of skyrmion
lattice states. In these studies, resonant X-ray magnetic
scattering techniques were used because the L2 absorption edge of Gd is located at 7.935 keV, which is suited forconventional scattering measurements. By analyzing lightpolarizations of scattered X-rays, magnetic structures inthese compounds were investigated. However, resonant
X-ray scattering is quite sensitive not only to the magnetic
moments but also charge density waves. A recent STM study
on GdRu2Si2 reported possible coexistence of magnetic andcharge modulations [5]. To verify the magnetic structures in
Gd-based skyrmion systems, we employ polarized neutron
scattering technique, which can unambiguously distinguishmagnetic modulations from charge/nuclear modulations.
In the present study, we focus on Gd2PdSi3, in which
the triangular skyrmion lattice state was discovered in thefirst field-induced phase. In zero field, this system exhibits
two magnetic phase transitions, which were identified byprevious specific heat measurements, below 21 K. According
to the previous resonant X-ray study, the ground state has
screw-type magnetic modulations, while the thermallyinduced phase was not investigated in detail. We thus studied
the temperature evolution of the magnetic order near zeromagnetic field by means of polarized neutron scattering.
Gd is one of the strongest neutron absorbers, and thus
we used an isotope-enriched 160Gd2PdSi3 crystal, which

has relatively weak absorption, for the present study. The
experiment was performed at the polarized neutron tripleaxis neutron spectrometer PONTA in JRR-3. The sample
was mounted in a closed-cycle refrigerator with the (H,K,0)
scattering plane. The spectrometer was operated in the Pzz
and Pxx longitudinal polarization analysis modes. In theformer mode, the direction of the neutron polarization isperpendicular to the horizontal scattering plane. In the latter,neutron polarization is set to be parallel or antiparallel to thescattering vector Q (= ki – kf ).
Figure 1(a) shows a polarized neutron scattering profile
of a magnetic Bragg reflection at (0,q,0) measured at
2.5 K. Red and blue symbols correspond to spin-flip (SF)and non-spin-flip (NSF) scattering intensities, which areproportional to Fourier-transformed magnetic moments
parallel to the c axis and those perpendicular to both thec axis and q-vector, respectively. Note that NSF signals may
also be attributed to a charge or lattice modulation with thesame q-vector. We thus measured the same reflection with
the Pxx configuration, in which all the magnetic signals areobserved only in the SF channel. As shown in Fig. 1(b),we found that the reflection does not contain NSF intensity, demonstrating that the reflection at (0,q,0) is purely
magnetic. We thus conclude that the magnetic structure in
the ground state is an elliptic screw-type structure. We alsomeasured temperature dependence of the SF and NSF intensities with varying temperature, and found that the c-axis
component of the magnetic moments disappears upon thephase transition to the intermediate phase. More detailed
analyses are ongoing and will be published elsewhere.
References[1] T. Kurumaji et al., Science. 365, 914 (2019).
[2] S. Muhlbauer et al., Science 323, 915 (2009).
[3] M. Hirschberger et al., Nat. Commun. 10, 5831 (2019).
[4] N. D. Khanh et al., Nat. Nanotech. 15, 444 (2020).
[5] Y. Yasui et al., Nat. Commun. 11, 5925 (2020).
Authors
J. Ju, H. Saito, and T. Nakajima

Tough and Highly Recoverable
Hydrogel Reinforced by
Strain-Induced Crystallization
Mayumi Group

Fig. 1. Polarized neutron scattering profile of a magnetic Bragg reflection at (0,q,0) measured at 2.5 K in (a) Pzz and (b) Pxx configurations.

26

ISSP Activity Report 2021

Hydrogels, cross-linked polymer networks containing
water, are expected to be applied for biomaterials such as
artificial cartilage, ligaments, and prosthetic joints due totheir high water content and biocompatibility. For the applications as the biomaterials, the mechanical toughness andinstant recoverability are needed because artificial ligaments
and prosthetic joints should survive under repeated highstress at a high frequency (ex. 1 Hz). Most tough hydrogels
are reinforced by introducing sacrificial structures that candissipate input energy [1]. However, since the sacrificial
damages cannot recover instantly, the toughness of thesegels drops substantially during consecutive cyclic loadings.
In this work, we have developed for the first time a toughand instantly recoverable hydrogels utilizing strain-induced
crystallization (SIC) [2].
We used slide-ring (SR) gel containing movable figureof-eight cross-links that work as pulleys to eliminate stressheterogeneities during deformation. SR hydrogel was

Fig. 2. Schematic illustration and WAXS patterns of SR gels.

Fig. 1. Stress-extension ratio curves of SR and Tetra gels, (b) loadingunloading curves of SR gels under repeated cyclic stretching.

prepared from polyrotaxane in which only 2 % of its polyethylene glycol (PEG) axis was threaded with a-cyclodextrin(CD) rings. The CDs are covalently cross-linked by adding
cross-linkers. The slidable cross-linking points in SR gelscan slide on the PEG chains to homogenize stress in thepolymer network. For comparison, fixed cross-link PEG
gels were prepared via end-crosslinking of Tetra-armed PEG
prepolymers. The PEG concentrations and molecular weights
of polymer strands between cross-linking points in the Tetragels were almost the same as those in the SR gels.
Fig. 1 (a) shows the tensile stress–extension ratio
curves until rupture for the SR and Tetra gels. The SR gelscan survive at higher stress (> 5 MPa) and higher strain(> 1000%) compared with the Tetra-PEG gels. The toughness of the SR gels is comparable to that of the most toughpolymer gel with the breakable sacrificial structure. Also, asshown in Fig.1 (b), the mechanical hysteresis of the SR gels
under repeated cycle is quite small, and the instant recovery
of extension energy between two consecutive cycles is
95 %, which is much higher than the low recoverability ofthe tough polymer gels having breakable structure (< 50%).
The high toughness of the SR gels originates from straininduced crystallization (SIC). As shown in Fig. 2, at large
strains, we observed diffraction spots in the wide-angle
X-ray scattering (WAXS) patterns, indicating the occurrence of SIC of the stretched PEG chains. On the other
hand, no diffraction spots were observed for the Tetra gels.
The slidability of the cross-liinking points homogenizes theorientation and deformation of PEG chains, which resultsin the remarkable high toughness of the SR gels. During theunloading process, the strain-induced crystalline structure
disappeared immediately. The reversible formation/destruction of the PEG crystals under repeated cycles leads to thehigh mechanical reversibility of the SR gels.
Although SIC has been reported in rubbers without any

solvent, it is the first time to discover the reversible SIC
in polymer gels with much lower polymer concentrations.
This self-reinforcement strategy by SIC is a novel concept
for realizing simultaneously high mechanical toughness andrapid recoverability under cyclic deformation, which arerequired for the biomedical materials for artificial joints andligaments.
References[1] J. P. Gong, Soft Matter 6, 2583 (2010).

[2] C. Liu, N. Morimoto, L. Jiang, S. Kawahara, T. Noritomi, H.
Yokoyama, K. Mayumi, K. Ito, Science 372, 1078 (2021).
AuthorK. Mayumi

Phase Transition in 5d1 Double
Perovskite Ba2CaReO6 Induced
by High Magnetic Field
Kindo, Y. Matsuda, and Hiroi Groups
Physical properties emerging from the combination effectof electron correlation and spin-orbit coupling have attracted
considerable attention in the last decade. In 5d transition
metal ions with partially filled t2g orbital, large spin-orbit
coupling of 0.4 eV may entangle the effective orbital angularmomentum and the spin angular momentum. The electronic
state is described by the effective total angular momentum
Jeff. For example, an unpaired electron in the d1 ion in
the cubic octahedral crystal field occupies the Jeff = 3/2
quartet. In solids, interactions among spin-orbital entangled
electrons may give rise to exotic ground states such as aspin liquid and multipolar orders. When the d1 ions with the
Jeff = 3/2 state interact on the face-centered-cubic (FCC)
lattice, unconventional ground states such as multipolarorders, spin-orbit dimer phase, and spin-orbital liquid may
emerge. In the multipolar ordered states, magnetic dipolar,
electric quadrupolar, and magnetic octupolar moments
can be the order parameter. Magnetic properties of double
perovskite-type oxides, chlorides, bromides, and lacunar
spinel selenides have been investigated as Mott insula-

ISSP Activity Report 2021

27

tors with the Jeff = 3/2 state on the FCC lattice [1-4]. These
examples demonstrate that various multipolar and dimer
orders can be realized by applying a certain perturbation via
non-magnetic cations and ligand anions.
Another way for exploring a novel electronic phase isapplying strong magnetic field comparable to the magnitudeof interactions among electrons. In the spin-1/2 Heisenberg
model on the tetragonally distorted FCC lattice as seen in
the rhenium double perovskite oxides at low-temperature,
successive field induced magnetic phases including the
1/2-magnetization plateau may appear in the magnetization process. While the electric quadrupoles do not couple
with magnetic field directly, a possibility of magnetic field
induced quadrupolar transition has been discussed in CeB6,
where the Ce atom with 4f1 electron configuration has Γ8quartet ground state of which symmetry is identical to the
Jeff = 3/2 quartet.
We focused on a rhenium double perovskite oxide
Ba2CaReO6, which is a candidate of the Jeff = 3/2 Mott
insulator with Re 6+ (5d 1) ions. The magnetization of
Ba2CaReO6 was measured in the pulsed high magnetic fieldby changing the maximum magnetic field values up to 66
T as shown in Fig. 1 [5]. The magnetization curve at 4.2 K
deviates from the linear behavior around 35 T and exhibitsa steep increase at around 45 T, indicating the presenceof a magnetic field induced phase transition. The fullmagnetic moment of Ba2CaReO6 estimated from the effective magnetic moment is 0.38 μB and thus the magnetizationof 0.2 μB at the high field region is clearly smaller than thefull moment. The magnetic field induced phase transitionin Ba2CaReO6 was also clearly detected in the magnetostriction ΔL/L0T measured at 4.2 K as shown in Fig. 2. The
longitudinal magnetostriction is positive and amounts to
2-3 ×10-4 at around 60 T, while the transverse magnetostriction is negative and amounts to ~1 ×10-4 at around 60 T. The
longitudinal magnetostriction is plotted against magnetization in the inset of Figure 2. The magnetostriction changes
quadratically to magnetization up to around 40 T. The deviation from the quadratic behavior is observed as increasing
the field, suggesting a change in the way of spin-latticecoupling via orbital degrees of freedom. The magnetic field
induced phase transition is attributed to the transition fromthe collinear to the canted antiferromagnetic orders withpossible changes in the orbital states. Ba2CaReO6 would
reside in the parameter regime close to the boundary between
the two magnetic orders, representing a suitable material forinvestigating the interplay between the spin-orbital entangled
electrons and magnetic field.
References[1] H. Ishikawa, T. Takayama, R. K. Kremer, J. Nuss, R. Dinnebier, K.
Kitagawa, K. Ishii, and H. Takagi, Phys. Rev. B, 100, 045142 (2019).
[2] H. Ishikawa, T. Yajima, A. Matsuo, Y. Ihara, and K. Kindo, Phys.
Rev. Lett. 124, 227202 (2020).
[3] H. Ishikawa, T. Yajima, A. Matsuo, and K. Kindo, J. Phys.:
Condens. Matter 33, 125802 (2021).
[4] D. Hirai, H. Sagayama, S. Gao, H. Ohsumi, G. Chen, T. Arima, and
Z. Hiroi, Phys. Rev. Research 2, 022063 (2020).

[5] H. Ishikawa, D. Hirai, A. Ikeda, M. Gen, T. Yajima, A. Matsuo,
Y. H. Matsuda, Z. Hiroi, and K. Kindo Phys. Rev. B 104, 174422(2021).

Authors
H. Ishikawa, D. Hirai, A. Ikeda, M. Gen, T. Yajima, A. Matsuo, Y. H.
Matsuda, Z. Hiroi, and K. Kindo
Fig. 1. Magnetization curves of Ba2CaReO6 measured up to 66 T (red)and those of relative compounds Ba2MgReO6 (blue) and Sr2MgReO6(black).

New Material Exhibiting
the Interplay between Non-magnetic
3d-electron Kagome Bands and
4f-electron Magnetism
Kindo, Ozaki, and Tokunaga Groups

Fig. 2. Magnetostriction ΔL/L0T of Ba2CaReO6 measured at 4.2 K. The
magnetostriction with positive and negative values correspond to thelongitudinal and transverse magnetostriction, respectively. The longitudinal magnetostriction is plotted against the magnetization in the inset.

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ISSP Activity Report 2021

Kagome lattice, a two-dimensional network made ofcorner shared triangles, has attracted condensed matterphysicists as a platform for realizing novel electronic states.
A localized spin system on the kagome lattice is a typicalexample that exhibits a quantum spin liquid ground state
due to the geometrical frustration. Itinerant electrons on the
kagome lattice produces a band structure with uncommon
features such as a Dirac point, van Hove singularity, and aflat band and may host unconventional density wave orders
or superconductivity. Experimentally, 3d transition metalcompounds with kagome lattice have been investigatedin search for novel correlated electronic phases. Kagome
cuprates are candidates for the Mott insulator with a quantum
spin liquid ground state. Intermetallic compounds with the
kagome layers of Cr, Mn, Fe, and Co have been investigatedin recent years as a metal with large anomalous Hall effectand novel band structures. Recently, a series of vanadiumtion was observed at 5 K in GdV6Sn6. The magnetic ordercauses the negative magnetoresistance at weak magnetic
field region below 1 T, which is absent in the non-magnetic
YV6Sn6, pointing to a coupling between Gd-spins on thetriangular lattice and carriers in the V-kagome layer. Our
results demonstrate that RV6Sn6 family including GdV6Sn6
provide a new class of material to investigate the interplay between itinerant non-magnetic 3d-electron withbands inherent to the kagome lattice and magnetism of the
4f-electron on the triangular lattice.
References[1] L. Romaka, Y. Stadnyk, V. V. Romaka, P. Demchenko, M.
Stadnyshyn, and M. Konyk, J. alloys compd. 509, 8862 (2011).

[2] H. Ishikawa, T. Yajima, M. Kawamura, H. Mitamura, and K.
Kindo, J. Phys. Soc. Jpn. 90, 124704 (2021).
Fig. 1. Magnetoresistance of GdV6Sn6 at 1.4 K measured up to 56 T
in pulsed magnetic field. A fit to H 0.75 magnetic field dependence,
which is used to estimate the oscillating component ΔR, is shown by thedashed line.

Authors
H. Ishikawa, T. Yajima, M. Kawamura, H. Mitamura, and K. Kindo

Extraordinary π-electron
Superconductivity in a Doped
Quantum Spin Liquid
Kindo and Kohama Group

Fig. 2. Fermi surface plot of GdV6Sn6 including the effect of spin
splitting.

antimonide AV3Sb5 (A = K, Rb, Cs) have attracted considerable attention as a new member of the kagome metal.
AV3Sb5 compounds exhibit various phenomena such as
the co-existence of charge density wave (CDW) order andsuperconductivity and the anomalous Hall effect withouta magnetic order, suggesting that vanadium kagome metal
is a promising platform for investigating unconventional
electronic properties. Kagome layers made of vanadium
are found in a series of stannide RV6Sn6 (R = Rare Earth),which are discovered in 2011 in the polycrystalline form[1]. Their physical properties are not investigated in the firstreport. The short V-V distances of approximately 2.7 Å may
produce metallic conductivity within the kagome layer as
seen in AV3Sb5. The variety of the rare earth ions, which
separate the kagome layers instead of alkaline metals in
AV3Sb5, may allow us to tune the physical properties.
We synthesized the high-quality single crystals of
GdV 6Sn 6 and YV 6Sn 6 and investigate their electronic
properties for the first time [2]. We revealed that GdV6Sn6
exhibits unique magnetotransport properties at low-temperature such as non-linear Hall resistivity and increase ofresistance R in magnetic field H as R ~ H0.75 up to 56
T with Shubnikov–De Haas oscillations as shown in theFig. 1. The first principles band structure calculations
revealed the presence of multiple Fermi surfaces with Diraclike band crossings near the Fermi-energy as shown in theFig. 2. The presence of multiple carriers is consistent with
the non-linear Hall resistivity. The observed Shubnikov–
De Haas oscillations can be attributed to the small Fermi
pockets. The non-magnetic analogue YV6Sn6 turned out toexhibit similarly non-linear Hall resistivity, suggesting thetwo compounds host common electronic structure arisingfrom the V-kagome layer. Moreover, a magnetic transi-

The realization of high-Tc superconductivity is one of
the holy grails of condensed matter physics. As one idea toachieve this, P. W. Anderson proposed a possible pathway
to the glory in 1987 just after the discovery of the high-Tc
cuprates [1]. Strong geometric frustration of magneticallyinteracting spins suppresses magnetic orders, resulting in aquantum spin liquid (QSL) state. Sufficient carrier doping
into a QSL yields mobility of the electrons keeping thecorrelated spin correlations, which perhaps lead to high-Tc
charged superconducting pairs using the spin fluctuations.
Nevertheless, it has been challenging to make superconductivity in a doped QSL stable in actual materials, and thus, theexperimental understanding of the frustration effect on superconductivity has been less well developed.
Recently, several papers [2,3] reported that the organic
superconductor, κ-(BEDT-TTF)4Hg2.89Br8 (κ-HgBr), is oneof the most plausible candidates for doped QSLs hostingsuperconductivity. This salt is classified into the strongly
correlated dimer-Mott system and has the almost regularFig. 1. (a) Molecular arrangement of the organic molecules in thetwo-dimensional organic layers in κ-HgBr. The dotted circles denotethe molecular dimers forming the triangular lattice. (b) Schematic ofthe dimer lattice. The arrows represent spins of π-electrons.

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29

References[1] P. W. Anderson, Science 235, 1196 (1987).
[2] H. Oike, K. Miyagawa, H. Taniguchi, and K. Kanoda, Phys. Rev.
Lett. 114, 067002 (2015).
[3] H. Oike, Y. Suzuki, H. Taniguchi, Y. Seki, K. Miyagawa, and K.
Kanoda, Nature Commun. 8, 756 (2017).

[4] S. Imajo, S. Sugiura, H. Akutsu, Y. Kohama, T. Isono, T.
Terashima, K. Kindo, S. Uji, and Y. Nakazawa, Phys. Rev.
Research 3, 033026 (2021).

Fig. 2. Field-temperature superconducting phase diagrams in parallel(a) and perpendicular (b) fields. The blue and red shaded areas
highlight the regions of the fluctuating superconductivity (FSC) andbulk superconductivity, respectively. The circles denote Tc whereas theboxes signify temperatures where FSC appears.

triangular lattice of the dimers, as shown in Fig. 1. Indeed,
its magnetism can be described by antiferromagneticallyinteracting spins on a triangular lattice and does not exhibit
any magnetic orders even at low temperatures. Thanks to thecarrier doping by the nonstoichiometric ratio of the HgBr
counter anions, the electronic state is an 11% hole-doped
state from the half-filled Mott insulator, leading to metallic
conductivity as well the superconductivity.
In this work [4], using various high-field measurements,
we revealed that the superconductivity that emerged fromthe doped QSL exhibits unique field-temperature superconducting phase diagrams, as shown in Fig. 2. The red area
represents the region of bulk superconductivity (SC) while
the blue area indicates the region of fluctuating superconductivity (FSC). In a magnetic field, superconductivity issuppressed by the paramagnetic pair breaking effect andthe orbital pair breaking effect, which yields limits of theupper critical field Hc2 known as the Pauli limit HP andorbital limit Horb. When applying magnetic fields parallelto the superconducting plane for two-dimensional superconductivity, the orbital pair breaking effect is quenchedand HP governs Hc2. As HP is proportional to the amplitudeof the superconducting energy gap, the coupling strengthof the superconductivity can be roughly estimated by theratio Hc2/Tc. As shown in Fig. 2(a), amazingly, Hc2/Tc for
κ-HgBr exceeds 6 TK-1, which is much larger than not only
1.84 TK-1 expected in the conventional BCS framework,
but also ~3 TK-1 observed in other strong-coupling organic
superconductors. Besides, Hc2/Tc in perpendicular fields(Fig. 2(b)) reaches about 3 TK-1, which is also much larger
than those of other superconductors. Considering the results
including the orbital limit in perpendicular fields, the superconductivity in κ-HgBr is realized by the extremely strong
pairing of the anomalously heavy π-electrons. We discuss
the origin of these anomalous features of the superconductivity and elucidate that these originate from quantum criticalbehavior developed near a quantum critical point of the QSL
insulating phase.
In addition, we find that FSC appears even much above
Tc (see the blue area in Fig. 2) compared to other organic
superconductors. It is not clear at present why the fluctuation region appears in the wide temperature range above Tc,
however, given the characteristic of the geometrical frustration to hinder long-range orders of spin-singlet pairing, thisnature may be attributed to a characteristic of the superconductivity appearing in doped QSLs.

Authors
S. Imajo, S. Sugiuraa, H. Akutsub, Y. Kohama, T. Isonoc, T. Terashimac,
K. Kindo, S. Ujic, and Y. NakazawabaTohoku University
bOsaka University
cNational Institute for Materials Science

Approaching the Best Wire for
Non-Destructive Pulsed Magnet
Kindo GroupNon-destructive pulsed magnet is the most important tool
for a precise measurement under very high magnetic field.
Generating high magnetic field, however, has been hardtask because the magnet is destroyed due to considerable
Maxwell stress. The stress reaches about 2 GPa in the fieldof 70 Tesla(T). The simplest solution for generating highfield non-destructively is making the coil-wire strong. Cu-Ag
wire has been the best candidate for the coil-wire because
the wire has the tensile strength of about 1.1 GPa and the
conductivity of about 80% of copper. By using the wire, we
succeeded in generating a field of 85.8 T in 2011. The bestwire, unfortunately, was an accidental success. The wire
was not reproduced though we continued to produce wires
with similar physical properties. There were many wires
having the same strength and conductivity but nothing could
generate the field exceeding 80 T. This would be a mystery
because the maximum field depends on the tensile strengthof the wire mainly. Our efforts to reproduce the best wire
were in vain. 10 years have passed since it became mystery.
To solve the mystery, we firstly classified the wire into
good ones and bad ones. This classification indicated clearly
that the quality of the wire depends on the manufacturing
process, especially drawing one. In November 2021, we
tested a wire regarded as an ideal combination of manufacturing process. Figure 1 shows the waveform of the magnetic

Fig. 1. The shape of completely non-destructive magnetic field of 85.97
Tesla.

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ISSP Activity Report 2021

field generated using this wire. There was no distortion of
the waveform from the start to the end of the magnetic field
generation, and we succeeded in generating a magnetic
field of 85.97 T completely non-destructively, breaking theprevious record.
The mystery of Cu-Ag wire was solved. The mystery lay
in the manufacturing process, especially drawing one. Basedon these results, we will develop wires that have undergone
the ideal manufacturing process to generate even higher
magnetic fields, and will provide a 100 T fields non-destructively contributing the joint research program.
Authors

K. Matsui, A, Matsuo, and K. Kindo

Particle-Hole Symmetry Breaking
in a Spin-Dimer System TlCuCl3
Observed at 100 T
Y. H. Matsuda and Kindo GroupIn a pure dimer system, the transition between singlet
state and the Sz = 1-triplet state under an external magnetic
field drives a phase transition at the critical magnetic field
Hg ≡ Δ/gμB with Δ the spin gap. The Hg separates into two
distinct critical points Hc1 and Hc2 in real spin-gap materials
due to interdimer interactions; these two critical magnetic
fields correspond to the beginning and saturation of themagnetization, respectively. It has been proposed that thefield-induced ordering phase at Hc1 in the dimer system withfinite interdimer interactions (a three-dimensional S = 1/2
spin-gap dimer system) can be interpreted as a Bose-Einsteincondensation (BEC) phase of magnons [1]. For a long time,
this field-induced ordering phase at Hc2 was thought to be
the BEC phase of holes of magnons [2], e.g., the magneticfield dependence of the order parameters in phase diagrams
has a symmetry with respect to the particle-hole invariant
point H = (Hc1 + Hc2)/2. However, the universality of thissymmetry has been questioned in strong interdimer interaction system.
In present work, we study the magnetization (M) processof TlCuCl3 (a strong interdimer interaction spin system) up
to 100 T and discuss the particle-hole symmetry breaking of
the BEC phase [3]. Figure 1 shows the magnetization process
and the magnetic field dependence of the dM/dH at 2 K; themagnetization data simulated by the quantum Monte Carlo(QMC) calculation is also presented for the comparison of
the M-H curves. The magnetization curve (M-H curve) has
a monotonous convex downward shape, which manifests
the difference between the critical behaviors around Hc1 andHc2 and implies the absence of the particle-hole symmetry in
TlCuCl3.
The breaking of symmetry can be simply understoodin the bond operator theoretical formalism. The magnetism
around Hc1 is contributed to by the outset of lowest triplet|↑↑>, namely, Sz = 1 condensations driven by the vanishingspin gap. In the pure-dimer limit Jintra >> Jinter, the other twohigher-energy local excitations (|↑↓> + |↓↑>) and |↓↓> canbe neglected since they hardly affect the low-temperaturephysics. However, a finite Jinter interaction can mediate afour-particle interaction that accumulates highest-triplet|↓↓> excitations in the presence of a partial lowest-triplet
condensation and singlet condensation [4]. Therefore, |↓↓>

Fig. 1. The magnetization curve measured up to 95 T, as well as thedM/dH data. Red marks represent the results of Ref. [4]. The inset
shows Comparison between the experimental magnetization curve and
the QMC simulation results.

excitations suppress the magnetization from the |↑↑> condensations when H ≳ Hc1. When the magnetic field increases
beyond Hc1, such a suppression eventually becomes inefficient due to a large Zeeman gap to excite a |↓↓> quasiparticle
and is negligible near Hc2. Therefore, it can be concluded
that the particle-hole symmetry in the weak interdimer spin
system is broken in TlCuCl3 due to the strong higher-orderterms through the interdimer interactions.
References[1] T. Nikuni, M. Oshikawa, A. Oosawa, and H. Tanaka, Phys. Rev.
Lett. 84, 5868 (2000).
[2] M. Jaime, V. F. Correa, N. Harrison, C. D. Batista, N. Kawashima,
Y. Kazuma, G. A. Jorge, R. Stein, I. Heinmaa, S. A. Zvyagin, Y.
Sasago, and K. Uchinokura, Phys. Rev. Lett. 93, 087203 (2004).
[3] X.-G. Zhou, Y. Yao, Y. H. Matsuda, A. Ikeda, A. Matsuo, K. Kindo,and H. Tanaka, Phys. Rev. Lett. 125, 267207 (2020).

[4] M. Matsumoto, B. Normand, T. M. Rice, and M. Sigrist, Phys.
Rev. B 69, 054423 (2004).
Authors
X.-G. Zhou, Yuan Yao, Y. H. Matsuda, A. Ikeda, A. Matsuo, K. Kindo,and H. Tanakaa
aTokyo Institute of Technology

Two Spin-State Crystallizationsin LaCoO3 up to 200 T
Y. H. Matsuda GroupThe puzzling properties of LaCoO3 have been drawing
the attention of researchers for more than 60 years, regarding
the uncovered origin of the magnetic and insulating state
at intermediate temperature range of 100 - 500 K. LaCoO3
is characterized by the spin-state degrees of freedomthat governs the temperature evolution of the electronic
and magnetic properties. The origin of the magnetic andinsulating state between 100 - 500 K is quite controversial,although it has been widely accepted that the ground state is
the low spin (LS) non-magnetic insulator. As the origin of
the magnetic states, some argue that the intermediate spinstate (IS) is involved, while others claim that the mixture of
the LS and high spin (HS) states is important. Many experimental results support each claim, being unable to put an end

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31

to the long-standing discussion. We believe that this controversy is rooted in the itineracy-localization duality of correlated electrons in LaCoO3.
We tackled this long-standing problem by using pulsed
ultrahigh magnetic field beyond 100 T because beyond
100 T are supposed to be useful in controlling the excited
spin-states. In the previous study of ours, we discovered
two kinds of spin-state orderings, α and β phases that are

Fig. 1. Phase diagram of LaCoO3 uncovered by the FBG based magnetostriction measurement up to 200 T.

extended beyond 100 T on the B-T phase diagram [1], bymeans of magnetization measurements using the induction
method. However, the magnetization study shows only little
information on the difference between the uncovered α and βphases, especially regarding the spin-state configurations.
We came up with an idea that magnetostriction measurement will supplement the magnetization study because thespin-state degree of freedom is coupled with the lattice
volume even more directly than magnetization is. For thispurpose, we have developed an ultrahigh speed magnetostriction measurement instrument utilizing the fiber Bragg
grating (FBG) and optical filter method [2], for the measurement above 100 T. By means of the FBG based method, we
have successfully revealed the magneto-lattice properties of
LaCoO3 up to 200 T [3]. The result shows very clearly that α
and β phases are quite different in volume and that both haveconstant volume above 100 T, indicating both phases aresuper-lattice formations (crystallizations) of the spin-states.
We have claimed several possible crystallizations in thepaper [3]. The result clearly shows that the spin-state interactions lead to kinds of long-range ordering in LaCoO3. At thismoment, we still do not know why the ordering is present
only in high magnetic fields. We further push the study toeven higher magnetic field of 600 T using electromagnetic
flux compression method and FBG based magnetostriction measurements, which have clarified even exotic phase
diagram up to 600 T [4].
References[1] A. Ikeda, T. Nomura, Y. H. Matsuda, A. Matsuo, K. Kindo, and K.
Sato, Phys. Rev. B 93, 220401(R) (2016).
[2] A. Ikeda, T. Nomura, Y. H. Matsuda, S. Tani, Y. Kobayashi, H.
Watanabe, K. Sato, Rev. Sci. Instrum. 88, 083906 (2017).
[3] A. Ikeda, Y. H. Matsuda, and K. Sato, Phys. Rev. Lett. 125, 177202(2020).

[4] A. Ikeda, Y. H. Matsuda, K. Sato, Y. Ishii, H. Sawabe, D.
Nakamura, S. Takeyama, and J. Nasu, arXiv:2201.02704.
Authors
A. Ikedaa, Y. H. Matsuda and K. SatobaUniversity of Electro-Communications
bNational Institute of Technology

Magnetic Field-Induced Phenomena in
the Unconventional Superconductor UTe2
Tokunaga Group

Fig. 2. Comparison of the temperature dependence between magnetization and magnetostriction at B ~ 50 T and 100 T and the sample temperatures from 4.2 to 300 K.

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ISSP Activity Report 2021

Unconventional superconductivity in UTe2 is one of
the hot topics in strongly correlated electron systems. The
spin-triplet superconductivity is very likely because of its
extremely high superconducting (SC) critical fields. Since its
discovery three years ago, many experimental and theoreticalworks with intense competition revealed novel phenomena
realized in UTe2 [1]. External parameters, such as pressure
and magnetic field (H), strongly affect superconductivity
and magnetism in UTe2. One of the intriguing phenomena
induced by applied H is the reinforcement and reemergenceof SC phases, which are sensitive to the H directions [2].
When the H applied along a hard magnetization b axis, theH reinforces the SC transition above 15 T. With increasing
H, the superconducting transition temperature Tsc increases
and is suppressed above μ0Hm ~ 35 T, where a first-ordermetamagnetic transition takes place (see Fig. 1(b)) [3]. Moresurprisingly, the H along near the [011] direction inducesanother SC phase above Hm [2]. Thus, the metamagnetic

Fig. 1. (a)Phase diagrams of UTe2 for H || b and ~[011]. The inset
zooms near Hm. The filled (open) circles and squares indicate Hm(crossover) and Tχmax, respectively. Magnetic field dependences of (b)magnetization extrapolated to 0 K, (c)electronic specific heat coefficient derived by thermodynamic relations, (d)linear and volume magnetostriction at Tini = 1.4 K and (e)anisotropic magnetostriction at Tini =1.4 K.

transition strongly affects the SC transition. However,their relationship and the origin of metamagnetism leave
many mysteries. Using state-of-the-art pulsed-high-field
experiments developed in the International MegaGauss
Science Laboratory at the ISSP, we have studied H-induced
phenomena in UTe2.
In order to address the relationship between metamagnetic and SC transition, we revealed the mass enhancement
as a function of the magnetic field and its direction [4]. In
general, the larger the density of state, the higher Tsc is. Field
dependence of the electronic specific heat coefficient, γ (H),is derived thermodynamically by analyzing the T dependenceof magnetization (M) at constant fields and phase diagram.
Since the magnetocaloric effect (MCE) is significant [5], thesample temperature varies during the H sweep. To accountfor the MCE, we measure the sample T and M simultaneously using field-insensitive capacitance thermometersdeveloped by Miyake et al. [6]. This method is also potent indetermining the magnetic phase diagram more precisely.
The inset of Fig. 1 (b) shows the M (T) curves at constant
H. On approaching Hm, T decreases significantly. This M (T,H) evaluation is the first attempt and a considerable breakthrough in the pulsed-field experiments. The sign change in
dM/dT across Hm indicates the existence of a peak of γ (H)at Hm from Maxwell’s relation. The γ (H) should change
discontinuously across Hm because of the first-order transition. We solved this issue by employing Clausius-Clapeyron’s equation. As shown in Fig. 1(a), dHm/dT changes in
its sign from positive for H || b to negative for H || ~[011].
This change means that the negative Δγ (H) crossing Hmfor H || b changes to positive for H || ~[011] [see Fig. 1(c)].
The negative (positive) Δγ (H) for H || b (~[011]) is consistent with the suppression (reemergence) of SC at Hm. Thesefindings hint at understanding the origin of the SC phases
varying with the field directions.
Since the metamagnetic transition is of the first order, thevolume at least should change across Hm. Thus, we tried toreveal volume/structural change, namely lattice instability, at
Hm through the magnetostriction [7]. We performed magnetostriction measurements using the optical fiber with fiberBragg-grating and the optical filter method developed in
Ikeda et al. [8]. The inset of Fig. 1 (d) is a schematic drawingof the setup for the magnetostriction measurements. The barefiber optics were glued directly on the sample parallel andperpendicular to the field direction along the b axis, as inRef. [9]. This method enables us to obtain the longitudinal
and transverse magnetostriction simultaneously, the firstexample in pulsed fields.
ΔLi/Li’s (i = a, b, c) show anisotropic H dependencies
and change discontinuously at Hm, as expected for the firstorder transition (Fig. 1 (d)). The volume magnetostriction
ΔV/V, i.e., a summation of ΔLi/Li, shows a discontinuouschange of –5.9 × 10-4 at Hm. Knowing ΔV and ΔM at Hm, we
can estimate pressure (p) dependence of Hm from ClausiusClapeyron’s equation. The Hm(p) obtained by the thermodynamic quantities are in good agreement with the Hm(p)determined experimentally, confirming the reliability of ourexperiments. An important finding here is the anisotropic
magnetostriction (AMS) defined as ΔLiAMS/Li = ΔLi/Li –ΔLavg/Lavg (the averaged linear magnetostrcition ΔLavg/Lavg= ΔV/3V). For the isotropic case, the AMS is small. Interestingly, the strong anisotropy appears in the bc plane, while
ΔLaAMS/La is very small. Thus, the metamagnetic transitionin UTe2 involves the lattice instability, which plays a crucialrole in the SC phases near Hm. We also suggest the possible

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33

valence instability in terms of the itinerant-localized duality
picture of the uranium magnetism [7].
Without experimental developments, the fascinated H-induced phenomena in UTe2 are not entirely solved.
In other words, UTe2 is our good trainer experimentallyand physically. Our struggles for a complete understanding
continue.
References[1] D. Aoki, J.-P. Brison, J. Flouquet, K. Ishida, G. Knebel, Y.
Tokunaga, and Y. Yanase, J. Phys.: Condens. Matter 34, 243002 (2022).
[2] 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).
[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] 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. 90,
103702 (2021).
[5] S. Imajo, Y. Kohama, A. Miyake, C. Dong, J. Flouquet, K. Kindo,
and D. Aoki, J. Phys. Soc. Jpn. 88, 083705 (2019).
[6] A. Miyake, H. Mitamura, S. Kawachi, K. Kimura, T. Kimura, T.
Kihara, M. Tachibana, and M. Tokunaga, Rev. Sci. Instrum. 91, 105103(2020).
[7] A. Miyake, M. Gen, A. Ikeda, K. Miyake, Y. Shimizu, Y. J. Sato, D.
Li, A. Nakamura, Y. Homma, F. Honda, J. Flouquet, M. Tokunaga, andD. Aoki, J. Phys. Soc. Jpn. 91, 063703 (2022).
[8] A. Ikeda, Y. H. Matsuda, and H. Tsuda, Rev. Sci. Instrum. 89,
096103 (2018).
[9] M. Gen, A. Miyake, H. Yagiuchi, Y. Watanabe, A. Ikeda, Y. H.
Matsuda, M. Tokunaga, T. Arima, and Y. Tokunaga, Phys. Rev. B 105,214412 (2022).
Authors
A. Miyake, M. Gena, A. Ikedab, K. Miyakec, Y. Shimizud, Y. J. Satod,
D. Lid, A. Nakamurad, Y. Hommad, F. Hondad, e, J. Flouquetf, M.
Tokunaga, and D. Aokid, faThe University of Tokyo
bUniversity of Electro-Communications
cOsaka University
dTohoku University
eKyushu University
fCEA-Grenoble

Ultrasound Measurement under
Ultrahigh Magnetic Fields
Kohama and Y. H. Matsuda Groups
Ultrasound is a powerful means to study numerous
phenomena of condensed-matter physics as acoustic waves
coupling strongly to structural, magnetic, orbital, and charge
degrees of freedom. In this work, we have developed a new
ultrasound measurement technique combined with the singleturn coil (STC) system, generating magnetic fields beyond
100 T [1].
Figure 1 summarizes the concepts of the ultrasoundpulse-echo (PE) and continuous-wave excitation (CW)
techniques. Usually, ultrasound measurements under pulsed
magnetic fields are performed with the PE technique,where the pulsed ultrasound is excited and the transmitted
echo signals are analyzed by a phase-sensitive technique.
In this case, cross-talk noise and higher echoes that arrive
after multiple reflections are separated in time. However,magnetic fields above 100 T are accessible only by destructive techniques, which generate fields only for several
microseconds. This field duration is too short to perform PE
ultrasound measurements. Instead, we have employed the
CW technique, which excites and detects ultrasound waves
continuously. In this case, the detected signal contains all
echo signals. Only if the 0th echo signal is dominant, the34

ISSP Activity Report 2021

Fig. 1. Schematics of the (a) pulse-echo and (b) continuous-wave ultrasound techniques. Here, CT means crosstalk.

Fig. 2. Relative change in the sound velocity of (a) green dioptase at 4
K and (b) liquid oxygen at 77 K.

detected signal reflects the change of sound velocity. Thiscondition is reasonably satisfied in various magnetic phasetransitions, where acoustic attenuation increases and higherecho signals do not affect the measurements. Therefore, theCW technique can be applied for detecting phase transitions
under ultrahigh magnetic fields.
Figure 2 shows representative results on green dioptase
and liquid oxygen. Results obtained by the STC (black)are compared with the ones by non-destructive magnets(cyan). These results reasonably coincide despite the significant difference in the field durations by the factor of 1000
(10 ms/10 μs). For the case of green dioptase [Fig. 2(a)],an anomaly corresponding to the magnetic phase transition
is observed at 65 T. Here, the measurement resolution is of
the order of Δv/v ~ 10−3, which is sufficient for detecting
various field-induced phase transitions. For the case of liquid
oxygen [Fig. 2(b)], a continuous decrease of sound velocity
is observed up to 120 T with the significant softening ofΔv/v ~ −0.2. The observed change in sound velocity isextremely large, and cannot be explained by a magnetovolume effect. We point out that this sound-velocity change
could be a precursor of a field-induced liquid-liquid transition of oxygen [2]. Now, the developed technique is open tousers.
References[1] T. Nomura, A. Hauspurg, D. I. Gorbunov, A. Miyata, E. Schulze, S.
A. Zvyagin, V. Tsurkan, Y. H. Matsuda, Y. Kohama, and S. Zherlitsyn,
Rev. Sci. Instrum. 92, 063902 (2021).
[2] T. Nomura, A. Ikeda, M. Gen, A. Matsuo, K. Kindo, Y. Kohama, Y.
H. Matsuda, S. Zherlitsyn, J. Wosnitza, H. Tsuda, and T. C. Kobayashi,
Phys. Rev. B 104, 224423 (2021).
Authors
T. Nomura, A. Hauspurga, D. I. Gorbunova, A. Miyataa, E. Schulzea,
S. A. Zvyagina, V. Tsurkanb, Y. H. Matsuda, Y. Kohama, and S.
Zherlitsyna
aHochfeld-Magnetlabor Dresden (HLD-EMFL)
bUniversity of Augsburg

Developing Novel Spectroscopy
Techniques Using a Segmented
Cross Undulator
I. Matsuda Group
Cross undulators, composed of a single set of insertion
devices for linear horizontal and vertical polarization witha phase shifter in between, have become available at worldwide synchrotron and x-ray free electron laser facilities. To
achieve higher degree of the light polarization, a segmented
type of the cross undulator, was designed and successfully
installed at SPring-8 BL07LSU [1]. At the beamline, thecontinuous variation of the phase shifts has realized smoothpolarization controls of soft X-ray beam between linear andcircular ones with fast switching (13 Hz) [1]. The oscillatory regulation has allowed us to determine the elementspecific complex permittivity in soft X-ray [1]. In the present
research, we demonstrated a new control of linear polarization at any angle with a segmented undulator.
The segmented cross undulator at SPring-8 BL07LSU
is composed of eight segments of insertion device (ID)and seven phase shifters (PSs), as shown in Fig. 1 (a). The
ID segment is a horizontal figure-8 undulator or a verticalfigure-8 undulator. The horizontal (H) and vertical (V) ID
segments are placed alternatively and sandwich a PS. A PS
is used to adjust the relative phase of radiation emitted fromeach segment by changing the path length of the electron
orbit in magnetic field. To realize linearly polarized lightwith arbitrary angle, θ, we combine two waves of the leftand right-handed circularly polarized light, generated by setsof the ID segments, Set A and Set B, as shown in Fig.1(a).
Set A or B is composed of the two H and two V segments.
When Set A produces right-handed (left-handed) circularpolarized light, we make Set B generate lefthanded (righthanded) circular polarized light. Then, the rotation angle (θ)
of linearly polarized light is controlled by changing the phaseshift between the left and right circularly polarized light at
the center PS. In other words, we can generate soft X-ray
beam with linear polarization that continuously rotates its
angle over 2π.
For demonstration, we made measurements of near-edge
X-ray absorption fine structure (NEXAFS) on a 2D film ofh-BN (Fig. 1(b)) [2]. Focusing on the π* and σ* NEXAFS
peaks, we traced their intensity variations with angle ofFig. 1. (a) A schematic drawing of the segmented undulator with H(blue) and V (red) ID segments and PS’s (orange). (b) An illustrationof a h-BN film. (c) The measurement configuration. (d) The rotational
NEXAFS spectra at the π* peak (hν = 401.5 eV) and the σ* peak(hν = 408.0 eV) [2].

the linear polarization, θ. Since this NEXAFS methodology is different from the conventional one, we hereafter
call it the rotational NEXAFS measurement. When theincident angle is 80o, as illustrated in Fig. 1(c), intensity ofhν = 401.5 eV (π*) becomes the maximum at θ = 0, π, 2π(horizontal) and the minimum at θ = π/2, 3π/2 (vertical),
while that of hν=408.0 eV (σ*) shows the opposite, as
shown in Fig. 1(d). The rotational NEXAFS experimentenhances the clear electronic contrast between the π* (out-ofplane) and σ* (in-plane) orbitals of h-BN. The experimental
plot is expected to be useful in making assignments of theelectronic states and in determining the precise configurationof molecules.
Figure 2 shows another demonstration of the rotational
X-ray spectroscopy experiment of the X-ray magnetic linear
dichroism (XMLD) [3]. Figure 2 (a) shows an Ni L-edge
XAS spectra of a NiO crystal taken with horizontal andvertical linearly polarized light at the incident angle of 80°
from the surface normal. XMLD spectra of the NiO crystal
is obtained by taking difference between the XAS spectra
taken with the horizontal and vertical linear polarizations(Fig. 2 (b)), showing clear linear dichroisms. Focusing on
the L2a and L2b peaks, the former has a large horizontal
intensity, while the latter has a large vertical intensity. The
spectral feature appears opposite in the XMLD signals.
Figures 2(c,d) show results of the rotational XMLD, taken at
the incident angle of 80°. The intensity changes with a periodof π, showing a clear XMLD contrast. The reversed features
between the ID section orders confirm the genuine XMLD
signals (red and blue lines in the figure). The technique canFig. 2. (a) XAS and (b) XMLD spectra of a NiO crystal at the Ni
L-edge and at an incident angle of 80o. In (a), the red (blue) curve
indicates a spectrum, taken by the horizontal (verticals) linear polarization. (c)(d) Plots of the Rotational XMLD, shown as intensity at
the L2a (hν = 869.95 eV) and L2b (hν = 871.55 eV) peaks at various
angles of linear polarization. The red plot shows the results for Set A
with right-handed polarization and Set B with left-handed polarization,
while the blue plot shows the results with the opposite polarization
configuration [3].

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35

be combined with a lock-in-amplification and it is expected
to detect fine magnetic signals of various materials.
References[1] J. Miyawaki, S. Yamamoto, Y. Hirata, M. Horio, Y. Harada, and I.
Matsuda, AAPPS Bulletin 31, 25 (2021).
[2] Y. Kudo, Y. Hirata, M. Horio, M. Niibe, and I. Matsuda, Nucl.
Instrum. Meth. Phys. Res. A 1018, 165804 (2021).
[3] Y. Kudo, M. Horio, Y. Hirata, T. Ohkochi, T. Kinoshita, and I.
Matsuda, e-J. Surf. Sci, Nanotechnol. 20, 124 (2022).
AuthorI. Matsuda

Visualization of the Strain-Induced
Topological Phase Transition
in a Quasi-One-Dimensional
Superconductor TaSe3
Kondo GroupThe control of the phase transition from topologicalto normal insulators can allow for an on/off switching of
the spin current. Topological phase transitions realized byelemental substitution [1] require the preparation of materials
with various compositions and are thus far from a feasible
device application, which demands a reversible operation.
In this study, we use angle-resolved photoemission
spectroscopy (ARPES) and spin-resolved ARPES (SARPES)
to visualize the strain-driven band-structure evolutionof the quasi-one-dimension (quasi-1D) superconductor
TaSe3. Our results demonstrate that it undergoes reversible
strain-induced topological phase transitions from a strong
topological insulator phase with spin-polarized, quasi-onedimensional topological surface states to topologically trivial
semimetal and band insulating phases. The quasi-one-dimensional superconductor TaSe3 provides a suitable platform forengineering the topological spintronics with the functionality
to on/off switch a spin current that is robust against impurity
scattering.
In the transition-metal trichalcogenides MX 3
(M = Nb, Ta; X = S, Se), physical properties vary andelectronic orders evolve differently in accordance with thedistinctive stacking sequences of the 1D chain variants[2]. Among them, TaSe3 is especially appealing in thatsuperconductivity emerges at low temperatures (~2 K) [3],in contrast with the other members, which typically undergocharge density wave transitions [2]. More intriguingly, recent
ab initio calculations predict that semimetallic TaSe3 belongs
to a three-dimensional (3D) strong TI phase [4]. Therefore,
it has been further suggested as a candidate for a topologicalsuperconductor with the topological surface states (TSSs)
formed near EF. Thanks to the van der Waals stacking of 1D
chains [2] and the electronic proximity to other topologicalphases [4], TaSe3 potentially brings an attractive functionality of controlling topological properties by fine-tuning of asingle physical parameter, i.e., the lattice variation via strain.
In Fig. 1 [5], we demonstrate the first unambiguous
confirmation of the strong TI phase in TaSe3. Figures 1c,dshows the calculated and correspondingly experimental band
dispersions around the Brillouin zone edge, where the TSSs
are expected (the sharp features in Figs. 1c,d). To elucidate
more details, we magnify the dispersions in Figs. 1e,f, where
one can see clearly two branches of TSSs. Utilizing ultrahigh resolution SARPES, we map the spin-resolved states in

36

ISSP Activity Report 2021

Fig. 1. Strong topological insulator phase in TaSe3 revealed by ARPES[5]. (a) Crystal structure of the quasi-1D monoclinic TaSe3 and apicture of single crystals mounted on a sample holder for ARPES
measurements. (b) 3D bulk Brillouin zone and its 2D projection. (c,d) Calculated and experimental band dispersions along the red arrowin (b) near the zone edge where topological surface states (TSSs) are
expected to emerge. (e, f) Magnified dispersions of (c, d) near EF. Twobranches of TSSs are observed. (g, h) Calculated and experimental
spin-polarization maps in the energy-momentum window marked by
the dashed box in (e, f). Measurement temperature was 10 K and a 7 eV
laser was used as a light source.

Fig. 1h within the energy-momentum window specified by
the dashed box in Fig. 1f. Correspondingly, the calculations
are also shown in Fig. 1g. One can see that our results nicely
reproduce the theoretical predictions of spin-polarized stateswith a spin-degenerated node point.
We have designed a device to apply strain to the quasi-1D
crystals, based on a bending mechanism, as shown in
Fig. 2a [5]. After tightening four screws, one can apply
uniaxial tensile strain to the crystals mounted on theplatform. This can be seen in Fig. 2b representing withcolor scale the distribution of longitudinal strain producedby the finite-element analysis. We also used commercial
strain gauges to measure the strain values and confirmed agood agreement of those with the simulations [5]. Figures
2d-f show the band dispersions around the zone edge
obtained under different strains tuned in-situ, revealing
two-step phase transitions. At zero strain (Fig. 2d), one
can see sharp and high-intense TSSs that are consistent
with those shown in Figs. 1d,f. With increasing strain up
to around 1%, the TSSs vanished (Fig. 2e) as a result of
the topological phase transition, i.e., the band inversion islifted and the bulk gap collapsed, turning the bulk state to
the trivial semimetallic phase. As the strain reached 2.4%,

Fig. 2. Strain-induced topological and metal-insulator phase transitions
revealed by ARPES for TaSe3 [5]. (a) A picture of the strain device wedesigned and used for ARPES measurements. (b) Finite-element tensile
strain simulation of the device (side view). (c) Top view of the device
with a strain gauge attached. (d-f) ARPES band dispersions aroundthe zone edge under strain controlled in-situ. The strain values applied
are described on the top of each panel. (g) ARPES intensity at EF as afunction of the strain value, crossing three distinct phases, i.e., strong
TI phase, trivial semimetal phase, and trivial insulator phase.

the band gap was reopened (Fig. 2f), and a metal-insulatortransition occurred. These phase variations are reflected on
the ARPES intensity at EF , which is plotted in Fig. 2g as afunction of strain values controlled in-situ. Comparing withour calculations, we conclude that we have realized two-stepphase transitions, from a strong topological insulator phase,across a topologically trivial semimetallic phase, to a normalband insulator phase.
In summary, we have demonstrated that TaSe3 hosts
a strong TI phase in its ground state. By means of in-situ
strain engineering of the band structure, we have observed
two-step phase transitions in TaSe3, including a topologicalphase transition from a strong TI phase to a trivial semimetal
phase, and a subsequent metal-insulator transition. We
note that TaSe 3 provides an excellent functionality ofeasily controlling the band topology by mechanical strain.
Such a strain method is much simpler, reversible, and thus
promising than element substitution method for futureapplication utilizing topological phase transition. Furthermore, our results give prediction that the Majorana fermionsemerge in the TaSe3 superconductor and they are controllable
by the strain method, so encouraging follow-up research
toward the future realization of the quantum computation.
References[1] S.-Y. Xu et al., Science 332, 560 (2011).
[2] P. Monceau, Adv. Phys. 61, 325 (2012).
[3] T. Sambongi et al., J. Phys. Soc. Jpn. 42, 1421 (1977).
[4] S. Nie et al., Phys. Rev. B 98, 125143 (2018).
[5] C. Lin et al., Nat. Mater. 20, 1093 (2021).
Authors
C. Lin, M. Ochia, R. Noguchi, K. Kuroda, M. Sakodab, A. Nomurac, M.
Tsubotad, P. Zhang, C. Bareille, K. Kurokawa, Y. Arai, K. Kawaguchi,
H. Tanaka, K. Yajie, A. Harasawa, M. Hashimotof, D. Luf, S. Shing, R.
Aritag,h, S. Tandab, and T. Kondo
aOsaka University
bHokkaido University
cTokyo University of SciencedGakushuin University
eNational Institute for Materials Science
fSLAC National Accelerator Laboratory
gThe University of Tokyo
hRIKEN

Multipole Polaron in
the Devil's Staircase of CeSb

compound CeSb [1].This new coupling mediates between
the itinerant electrons and the bosonic field constituted by
the crystal-electric-field (CEF) excitations of the localized
4f states. As evidence for it, we present laser angle-resolved
photoemission spectroscopy (ARPES) [2] revealing band
renormalization via the coupling of the mobile electron with
the CEF excitation. This low-energy feature corresponds to aquadrupole CEF excitation (Jz = ±2) in the J multiplets of the
4f orbitals, possessing the ‘multipole’ freedom.
We present ARPES maps at the anti-ferromagnetic (AF)phase taken by high-resolution laser-ARPES in Fig. 1a, b.
A clear signature for the band renormalization of the Sb 5pband is revealed: the Fermi velocity is largely reduced with aprominent kink at energy E−EF = −7 ± 1 meV, which directly
manifests the presence of an electron–boson coupling(Fig. 1b). In fact, this low energy scale of the kink structure
is consistent with the CEF excitation of the Ce 4f orbitals.
The CEF splitting in the ordered 4f states of CeSb shows theground state with Jz ≈ 5/2 (hereafter fΓ80) and the higher fΓ8
states with Jz ≈ 1/2 (hereafter f Γ*8) (Fig. 1c) [3]. The energy
scale of the fΓ80 to f Γ*8 excitation is ~5–6 meV and shows
good agreement with the kink energy (7 ± 1 meV). Since thequadrupole CEF excitation (|ΔJz| = 2) for fΓ80 to f Γ*8 has
multipole character, our observations of the prominent kinkreflect a coupling of the electron with the multipole CEF
excitation. Such a QP with a large mass enhancement can be
described as a multipole polaron that propagates in a sea oflamellar fΓ80 orbits but largely dressed with the self-induced
quadrupole polarization of the longitudinal f Γ*8 orbits, as
illustrated by Fig. 1d.

Fig. 1. (a) ARPES band map at T = 6 K (AF phase). (b) Magnified
image for the prominent kink in the band dispersion within the dashedrectangles shown in (a). (c) CEF scheme of the localized 4f states in theordered phase. (d) Schematic of the multipole polaron.

Kondo GroupAn electron-boson coupling, that leads to a quasiparticle(QP) of an electron combined with a local bosonic field,
can cause interesting properties of condensed matter. For
examples, dynamical behavior of a QP often plays roles
in electronic instabilities leading to strongly correlated
phenomena such as high-temperature superconductivity
and colossal magnetoresistance. Thus, the investigation ofsuch a QP is important in materials science. One of the most
famous QPs is the polaron by electron-phonon coupling
but such a QP state can be realized by coupling to otherbosonic modes. However, only three types of electron–boson
coupling have been experimentally identified: electron–
phonon (or polaron), electron–magnon (or magnetic polaron)and electron–plasmon (or plasmaron) couplings, despite anumber of investigations.
In this study, we found a new type of electron–
boson coupling which leads to a unique QP state, ‘multipole polaron’, by investigating a rare-earth intermetallic

Fig. 2. (a) Temperature scale of the devil’s staircase transition at zero
field. (b) Schematics of magnetostructures that comprise stackings offerromagnetic (arrows) and paramagnetic (circles) planes along the
crystallography axis [001]. The inset shows the magnetic texture forthe magnetic ground state (AF phase). (c-f) Magnified images for theprominent kink in the band dispersion for several distinct phases.

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37

References[1] Y. Arai et al., Nat. Mater. 21, 410 (2022).
[2] K. Kuroda et al., Nat. Commun. 11, 2888 (2021).
[3] J. Rossat-Mignod et al., J. Magn. Magn. Mater. 52, 111 (1985).
[4] P. Bak, Phys. Today 39, 38 (1986).
Authors
Y. Arai, K. Kurodaa, T. Nomotob, Z. H. Tinc, S. Sakuragi, C. Bareille,
S. Akebi, K. Kurokawa, Y. Kinoshita, W.-L. Zhangd, S. Shinb, M.
Tokunaga, H. Kitazawae, Y. Hagaf, H. S. Suzuki, S. Miyasakac, S.
Tajimac, K. Iwasag, R. Aritab,h, and T. Kondo
aPresent address: Hiroshima University
bThe University of Tokyo
cOsaka University
dSophia University
eNational Institute for Materials Science
fJapan Atomic Energy Agency
gIbaraki University
hRIKEN

Detecting Electron-Phonon Coupling
During Photoinduced Phase Transition
Okazaki and Itatani Groups
Photoinduced phase transitions have been intensively
studied owing to their potential capabilities to control amaterial of interest in an ultrafast manner, which can induce
exotic phases unable to be attained at equilibrium. As
materials of interest, strongly correlated electron systems
provide very fruitful playgrounds because they exhibit
very rich phases owing to intertwined couplings between
multiple degrees of freedom including charge, orbital, spin,
and lattice, where photoexcitation is a very promising way
to control their physical properties. Recently, we revealed
the photoinduced insulator-to-metal transitions (IMTs) in
Ta2NiSe5 by using time- and angle-resolved photoemission spectroscopy (TARPES) as schematically shown in
Fig. 1(a). Figures 1(b)-1(e) are TARPES spectra of Ta2NiSe5
in each delay time, and Figs. 1(f)-1(h) show differential
images of TARPES, where red and blue regions correspondto increasing and decreasing intensity, respectively. One cannotice that the photo-induced semimetallic bands shown
as red regions in Figs. 1(f)-1(h) cross the Fermi level (EF).
However, the key mechanisms are still under debate, and it iscurrently a central issue as to how the couplings between theelectron, lattice, and spin degrees of freedom are evolving
during the photoinduced phase transition.
In order to reveal the underlying mechanism in termsof the electron-phonon couplings, we mapped out thefrequency-dependent intensity of the Fourier components inthe energy and momentum space, which we call frequencydomain angle-resolved photoemission spectroscopy(FDARPES). Figures 2(a)–2(e) show the FDARPES spectra
corresponding to the frequencies of 1, 2, 3, 3.75, and 4 THz,
respectively. To see each phonon mode associated with the
FDARPES spectra, we performed the ab initio calculations.
First, we calculated the band structure of Ta2NiSe5 based on
the density functional theory within a generalized gradientapproximation (GGA), and confirmed that the results canoverall reproduce the photoemission results as shown in
Fig. 2(f). Then, we employed the calculations to obtain thephonon modes based on the density functional perturbation
theory. The calculated phonon modes corresponding to the 2and 3-THz modes are shown in Figs. 2(g) and 2(h). Noticeably, the FDARPES spectra exhibit distinctively different
behaviors depending on the frequency, which demonstrates
that each phonon mode is selectively coupled to the specific38

ISSP Activity Report 2021

Fig. 1. (a) Schematic illustration of time- and angle-resolved photoemission spectroscopy (TARPES), as applied to Ta2NiSe5. The pumppulse is infrared light, whereas the probe pulse is extreme ultraviolet
light produced by high harmonic generation. Photoelectrons aredetected by a hemispherical electron analyzer. (b)–(e) TARPES spectraof Ta2NiSe5. The delay time between the pump and probe is indicatedin each panel. (f)–(h) Differential images of TARPES. Red and blue
points represent increasing and decreasing photoemission intensity,
respectively.

electronic bands. Particularly, the 2-THz phonon mode has
the strongest signal around EF, where it consists of a mixtureof Ta 5d and Se 4p orbitals, and this signature is responsible
for the collapse of the excitonic insulating phase. In otherwords, the 2-THz phonon mode is revealed to be the moststrongly coupled to the emergent photoinduced electronic
bands crossing EF. Furthermore, we proceeded to compare
each FDARPES spectra with the band dispersions before andafter photoexcitation. We found that the FDARPES spectrumat 1 THz matches the band dispersions after photoexcitation
better than that before photoexcitation as shown in Fig. 2(a),while the FDARPES spectrum at 3 THz is closer to the band
dispersions before photoexcitation as shown in Fig. 2(c).
This means that both the semimetallic and semiconducting
bands are coexistent in the transient state, and suggests thestrong electron-phonon couplings for 1-THz and 3-THz
phonon modes are associated with the semimetallic andsemiconducting bands, respectively. Moreover, this finding
demonstrates that, whereas the semimetallic and semiconducting states coexist after photoexciation, the FDARPES
method can selectively reveal the coupling of each phononmode to semimetallic and semiconducting states by thefrequency-domain analysis.

Fig. 2. (a)–(e) Frequency-domain angle-resolved photoemission
spectroscopy (FDARPES) spectra shown as frequency-dependent
intensities of the oscillation components as a function of energy andmomentum. The peak positions in the TARPES spectra after and before
photoexcitation are plotted as blue and green circles in (a) and (c),respectively. (f) Calculated band structure of Ta2NiSe5 based on thedensity functional theory within a generalized gradient approximation(GGA) superimposed onto the photoemission spectrum before pumpexcitation. (g), (h) Calculated phonon modes corresponding to (b) and(c), respectively.

Reference[1] T. Suzuki, Y. Shinohara, Y. Lu, M. Watanabe, J. Xu, K. L.
Ishikawa, H. Takagi, M. Nohara, N. Katayama, H. Sawa, M.
Fujisawa, T. Kanai, J. Itatani, T. Mizokawa, S. Shin, and K.
Okazaki, Phys. Rev. B 103, L121105 (2021).
Authors
T. Suzuki, Y. Shinoharaa, Y. Lua, M. Watanabe, J. Xu, K. L. Ishikawaa,
H. Takagia,b, M. Noharac, N. Katayamad, H. Sawad, M. Fujisawa, T.
Kanai, J. Itatani, T. Mizokawae, S. Shina, and K. Okazaki
aThe University of Tokyo
bMax Planck InstitutecOkayama University
dNagoya University
eWaseda University

ISSP Activity Report 2021

39

Joint Research Highlights
Multiband Superconductivity
in Strongly Hybridized
1T’-WTe2/NbSe2 Heterostructure
Inducing superconductivity by proximity in materials
with nontrivial band topology has become a method in the
search for unconventional forms of superconducting pairing.
At the one-dimensional (1D) edges of two-dimensional (2D)
topological insulators the presence of non-Abelian parafermions has been predicted, which could have important
applications in topological quantum computation. Here, weinvestigate heterostructures of the quantum spin Hall candidate 1T’-WTe2, grown by in situ van der Waals epitaxy on asuperconductor 2H-NbSe2 by scanning tunneling spectroscopy down to 500 mK, which enables us to resolve thesuperconducting local density of states (LDOS) across theinterface between the two materials.
Figure 1 shows scanning tunneling microscopy (STM)
data of 1T’-WTe2/2H-NbSe2 heterostructures. In agreement with previous studies of WTe2 on bilayer graphene, we
observe islands with disordered boundaries and sizes up toa few tens of nanometer in diameter that are polycrystalline
on NbSe2 substrates. Lattice parameters estimated from FFTpatterns of the STM images are a ~ a1 = 3.5 ± 0.2 Å, andb~2a2cos(30°) = 6.2 ± 0.3 Å, in good agreement with thelattice parameters of WTe2 (a = 3.48 Å and b = 6.28 Å) and
NbSe2 (a1 = a2 = 3.45 Å). Local lattice matching implies a
5% compressive lattice strain along b, which has previously
been shown to further stabilize the WTe2 bulk gap.
In Fig. 2, tunneling spectra taken on the monolayer WTe2
and the NbSe2 substrate at 500 mK are presented, demonstrating the clear signature of a superconducting energy gap
in the 2D monolayer WTe2. The measured superconducting
LDOS within a self-consistent multiband framework thatconsiders a superconducting gap of each band and an interband Cooper-pair tunneling rate. It has been already known

Fig. 1. (left panels) STM topography of monolayer 1T’-WTe2 islands
grown on a single crystal of 2H-NbSe2 by van der Waals epitaxy. Upperright panel shows height proﬁle corresponding to the dashed white linein the lower right panel, showing a monolayer height of 8.2 Å. The
inset shows the respective 1T’-WTe2 and 2H-NbSe2 crystal structures.
Atomic-resolution close-up of the 1T’-WTe2 edge, showing detail ofthe atomic alignment.

40

ISSP Activity Report 2021

Fig. 2. tunneling spectra comparing the WTe2/NbSe2 spectrum with thatmeasured on the bare NbSe2 substrate. Solid red and blue lines are ﬁts
to our two-band (NbSe2) and three-band (WTe2) models, respectively.

that the gap of NbSe2 is well described with a scheme of
intrinsic two-band superconductor, and here we consider
a third order parameter ΔWTe2, coupled to the two NbSe2
bands, assuming intrinsic ΔWTe2 = 0. Fits to both a two-band(NbSe2, red line) and a three-band (WTe2/NbSe2, blue line)
model explain the data well (Fig. 2) and reproduce theknown NbSe2 order parameters. Self-consistently obtained
ΔWTe2 = (0.57 ± 0.02) meV, reflecting induced pairing, whichsuggests strong hybridization between the overlayer andsubstrate.
Our tight-binding calculations revealed that the strong
hybridization in WTe2/NbSe2 heterostructure substantiallyweakens the topological edge state signature compared with
WTe2/HOPG, which is only weakly hybridized. In spite ofFig. 3. (upper panel) STM-height proﬁle measured across a cleanedge of a WTe2 monolayer crystal. The inset shows the corresponding
STM topograph indicating position and direction of the line proﬁle(red arrow). (middle) A series of tunneling spectra measured T = 500
mK for points across the edge. (lower) Extracted spatial proﬁle of theinduced order parameter ΔWTe2(x) (blue), compared with a single-band
BCS-Dynes model (black).

the suppressed edge states, however, we observed enhanced
order parameter at the edge as shown in Fig. 3, where aspatial profile of the extracted order parameter ΔWTe2(x)based on the three-band superconductivity analysis is shown.
The plot also shows spatial oscillations with a period of~2 nm. Oscillations of comparable period are also observedin the order parameter extracted from a simple single-band
BCS model. This suggests that these arise from Friedel-likeoscillations in the local density of states due to scattering of
2D bulk states at the WTe2 edge. The exponential decaying
1D edge state, with decay length (1.1 ± 0.2) nm is comparable to the normal-state LDOS of the edge.
Reference[1] W. Tao et al., Phys. Rev. B 105, 094512 (2022).
Authors
W. Taoa, Z. J. Tonga, A. Dasb, D.-Q. Hoa, Y. Sato, M. Haze, J. Jiaa, Y.
Quea, F. Bussolottic, K. E. J. Goha,c, B. Wangd, H. Line, A. Bansild, S.
Mukherjeeb, Y. Hasegawa, and B. Webera,faNanyang Technological University, Singapore
bIndian Institute of Technology Madras
cAgency for Science Technology and Research (A*STAR)dNortheastern University
eInstitute of Physics, Academia Sinica
fMonash University
PI of Joint-use project: B. Weber
Host lab: Hasegawa Group

Bayesian Optimization of Thin Film
Growth Parameters
The use of thin films for developing new crystalline
materials is an attractive approach because the crystal growth
process is fast, the volume of required material is small, anda relatively large number of samples with varying composition or structure can be rapidly synthesized. However, thephysical properties of thin films are very sensitive to smallchanges in the various process parameters that control thefilm growth. Besides the usual thermodynamic parameters,such as pressures or temperatures, thin film growth is also
affected by kinetic effects, such the growth rate. For thisreason, the process space, in addition to the composition
space, can be very multi-dimensional. Exhaustive mappingof materials properties over the whole available temperature, pressure, growth rate, etc. ranges is therefore verytime consuming and in practice, a human operator would
struggle in determining the optimum combination of parameter combinations to test to complete a materials exploration
or optimization task with the smallest number of experiments. In this regard, help may be available from the various
machine learning methods that have been developed inrecent years. In particular, the dimensionality problem of theprocess parameter space can be handled by Bayesian optimization, as illustrated in Fig. 1.
The thin film synthesis system illustrated in Fig. 1 wasrecently developed by Dr. Ohkubo at NIMS [1]. Nitride thinfilms are grown by metal-organic molecular beam epitaxy(MO-MBE) from an organic precursor in the presence ofactivated nitrogen plasma. In this work, the growth of TiN
was attempted as a demonstration of the MO-MBE processusing tetrakis(dimethylamido)titanium (TDMAT) as a Ti
source. The TiN films were characterized by x-ray diffraction(XRD) and transport analysis. In particular, the superconducting transition temperature of TiN was used as a moresensitive measure of the crystalline quality of the films thanFig. 1. Closed-loop optimization of epitaxial thin film growth conditions using a Bayesian approach. Nitride thin films were grown bymetal-organic molecular beam epitaxy (b) and characterized by x-ray
diffraction (c). The film peak intensity was used as the feedback for theBayesian optimizer (a).

is possible by XRD analysis. A small set of initial samples
was synthesized by manually selecting the primary processparameters: the film growth temperature, the TDMAT source
foreline pressure, the nitrogen flow rate, and the excitation
power of the nitrogen plasma source. These four parameters
effectively determine the growth mode (temperature), rate
(TDMAT flow rate), and the nitrogen activity.
After the initial set of samples were synthesized andcharacterized by XRD, further combinations of the fourmain parameters were selected by a Bayesian optimization
process using the normalized TiN peak intensity in the XRD
pattern as the objective function. The growth temperature
range was limited to 550 to 900 °C, the TDMAT pressure
was between 0.5 and 10.5 Torr, the N2 flow rate was limited
to 0.5 to 5 sccm, and the plasma source power limits were
270 to 500 W, forming a search grid of 7 × 100 × 45 × 23
points. After every film growth experiment, the XRD pattern
was analyzed and a new process point was determined by the
Bayesian process. The cycle was repeated for 20 times. No
further improvement of the XRD peak intensity was obtained
after 10 cycles.
The low-temperature superconducting transition temperature measurements were done at ISSP. The gradual improvement of the critical temperature in the Bayesian optimization
process is shown in Fig. 2. It can be seen that the maximum
Tc of 5.2 K was obtained on the tenth cycle, after which nofurther increase was obtained.

Fig. 2. Gradual improvement of the superconducting transition temperature of TiN thin films as a function of the synthesis-characterizationselection cycle index. No further improvement was obtained after just
10 synthesis experiments.

ISSP Activity Report 2021

41

This experiment was the first demonstration of closedloop thin film synthesis controlled by a machine learningalgorithm for reducing the number of film growth experiments required to reach the optimal physical properties.
In this work, XRD was used as the source of the feedback
signal for the Bayesian process. This means that the cycle
time (Fig. 1) was limited by the diffraction analysis, not bysynthesis. In addition to the XRD and transport data, in situ
electron diffraction data was also collected. In the future,
it may be possible to greatly increase the rate of materials
development by using real-time in situ characterization tools
for providing the feedback signal for a Bayesian processoptimizer.
Reference[1] I. Ohkubo, Z. Hou, J. N. Lee, T. Aizawa, M. Lippmaa, T.
Chikyow, K. Tsuda, and T. Mori, Mater. Today Phys. 16, 100296(2021).
Authors
I. Ohkuboa, Z. Houa, J. N. Lee, T. Aizawaa, M. Lippmaa, T. Chikyowa,
K. Tsudaa, and T. MoriaaNIMS

PI of Joint-use project: I. Ohkubo
Host lab: Lippmaa Group

Adsorption and Reactionof Formic Acid on Cu(111)
Hydrogen is one of the promising energy sources
toward the carbon neutral and sustainable society. Formic
acid (HCOOH) has attracted attention as a candidate forthe hydrogen storage material because it is nontoxic andexists as a stable molecule at standard temperature andpressure conditions. In general, HCOOH can be catalyticallyconverted into CO2 and H2 via dehydrogenation or into CO
and H2O via dehydration. Among others, a Cu surface is oneof the attractive catalysts, because HCOOH is selectively
decomposed into CO2 and H2 via the formate (HCOO) intermediate without generating CO. However, the mechanism of
HCOOH dehydrogenation is not yet fully understand. One of
the reasons may be that the state of HCOOH on a Cu surface,in which HCOOH is adsorbed in a polymeric form, is not
yet determined. Furthermore, there is a discrepancy between
the computational and experimental adsorption energies [1].
Toward the full understanding of the HCOOH dehydrogenation on Cu catalyst, we conducted density functional theory
studies on monomeric as well as polymeric adsorption of
HCOOH on Cu(111), as well as their dehydrogenation
reactions.
We used the rev-vdW-DF2 [2], a variant of the van der
Waals density functional (vdW-DF). Use of vdW-DF is
essential, as the interaction between HCOOH and Cu surface
is very weak and is of dispersion type. The surfaces wererepresented using slab models, and the electrostatic interaction in the surface normal direction was treated rigorously byusing the effective screening medium method.
We first investigated the monomeric adsorption of
HCOOH on Cu(111) and found that the adsorption energy ismuch smaller than the experimental value, when the generalized gradient approximation is used, while it is in better
agreement with the experiment, when the dispersion forces
are properly described via vdW-DF [3].
We then investigated the molecular structures for thepolymeric HCOOH adsorption. In the literature, there

42

ISSP Activity Report 2021

have been proposals of the so-called α- and β-polymeric
structures on the surfaces (Fig. 1), according to the crystalline HCOOH, but the stable form on Cu(111) has yet tobe resolved. We explored the stable structure of polymeric
HCOOH by considering various structures and in-plane
periodicities. HCOOH interacts weakly with the surface,
while it interacts with the neighboring molecules via the
H-bonding-like interaction. We found that the β-polymeric
form is energetically more stable than the α one, although
they are energetically competing. However, by simulating
the vibrational spectra, scanning tunneling microscopy/
atomic force microscopy (AFM) images (Fig. 2), andby comparing with the experiments, we concluded thatα-polymeric HCOOH is more plausible and has been formed
and observed in the experiments [4, 5]. We then studied
the dehydrogenation reaction by taking the edge effect into
account. We found that the dehydrogenation reaction isfacilitated at the edge of the polymeric HCOOH chain, andit barely occurs within the polymeric HCOOH chain. Our
results are consistent with the previous experiments.
The polymeric HCOOH is decomposed (in part) into
HCOO and form complex nanostructures, depending on
the annealing temperature. We performed extensive structure search of HCOOH-HCOO and HCOO with different
compositions and successfully determined the structures ofchain-like monodentate HCOO + HCOOH and monodentate
HCOO + bidentate HCOO aggregates as well as bidentate
HCOO clusters by evaluating the adsorption energies andsimulating the AFM images [4].
In summary, we have clarified the adsorption states of
HCOOH as well as the aggregates composed of HCOOH
and HCOO and the mechanism of the dehydrogenation of
HCOOH into HCOO on Cu(111), and succeeded in tracking
the fate of HCOOH on Cu(111) upon annealing.

Fig. 1. Structures of (a) α-polymeric and (b) β-polymeric HCOOH’s on
Cu(111).

Fig. 2. (a) Simulated scanning tunneling microscopy image and (b)simulated atomic force microscopy image of polymeric HCOOH in the
α-form on Cu(111). Tersoff-Hamann and probe particle methods wereused to generate the former and the latter, respectively.

References[1] Y. Shiozawa, T. Koitaya, K. Mukai, S. Yoshimoto, and J. Yoshinobu, J. Chem. Phys. 143, 234707 (2015).
[2] I. Hamada, Phys. Rev. B 89, 121103(R) (2014).
[3] S. E. M. Putra, F. Muttaqien, Y. Hamamoto, K. Inagaki, I. Hamada,and Y. Morikawa, J. Chem. Phys. 150, 154707 (2019).
[4] A. Shiotari*, S. E. M. Putra*, Y. Shiozawa, Y. Hamamoto, K.
Inagaki, Y. Morikawa, Y. Sugimoto, J. Yoshinobu, and I. Hamada,
Small 17, 2008010 (2021). (*: equal contribution)[5] S. E. M. Putra, F. Muttaqien, Y. Hamamoto, K. Inagaki, A.
Shiotari, J. Yoshinobu, Y. Morikawa, and I. Hamada, Phys. Rev.
Materials 5, 075801 (2021).
Authors
I. Hamadaa, S. E. M. Putraa, F. Muttaqienb, Y. Hamamotoa, K. Inagakia,
A. Shiotaric, Y. Sugimotoc, J. Yoshinobu, and Y. Morikawaa
aOsaka University
bInstitut Teknologi Bandung
cThe University of Tokyo

PI of Joint-use project: I. Hamada
Host lab: Yoshinobu Group

Photon Echo from Lensingof Fractional Excitations inTomonaga-Luttinger Spin Liquid
Physicists routinely diagnose the properties of a material
by its linear responses to external stimuli. The recently
developed nonlinear spectroscopy measures nonlinear opticalresponses to obtain more information on the material. Yet,
it is often unclear if there is a straightforward connection
between such nonlinear responses and the material’s properties, especially when its constituent particles strongly interact
with one another. We addressed this question by studying
theoretically a prototypical strongly interacting system, theTomonaga-Luttinger spin liquid. Tomonaga was the first to
point out that the low-energy excitations of fermions in one
dimensions can be described in terms of quantized soundwaves (phonons). Subsequent studies have established thatthe quantum theory of sound waves, which is now called
Tomonaga-Luttinger liquid, can describe the universal
low-energy physics of a wide variety of one-dimensional
critical quantum many-body systems. This includes critical
one-dimensional quantum spin systems, which are regarded
as Tomonaga-Luttinger spin liquids.
A remarkable feature of the Tomonaga-Luttinger spin
liquids is “fractionalization” of the spin excitations. In

Fig. 2. The photon echo signal in real time. Despite the fractionalization, the sharp signal remains over a long period of time thanks to thespinon lensing effect.

ordered magnets, the elementary excitation corresponds toa single spin flip and called “magnon”. A single magnon
is created by an absorption of photon (or a scattering of
neutron), resulting in a sharp peak in the spectrum of linear
response. In contrast, in the Tomonaga-Luttinger spin liquid,
the single spin flip caused by an absorption of photon
fractionalizes into two “spinon” excitations. This leads toa continuum in the linear response spectrum. While this“two-spinon continuum” is a characteristic signature of thefractionalization, the absence of the sharp peak makes theanalysis difficult.
We analyzed nonlinear optical responses of theTomonaga-Luttinger spin liquids in the context of terahertz(THz) two-dimensional coherent spectroscopy (2DCS),
which is developing rapidly in recent years. We find a direct
link between a specific nonlinear response, known as photonecho, and the dynamical properties of the excitations in thissystem.
The central finding in our work was that we can recover
the sharp peak even in the Tomonaga-Luttinger spin liquidwith the fractionalized spinon excitations, if we look at thenonlinear responses in a particular manner. The photon echo
is measured by three successive optical pulses. The sharp
response appears as a surge in the response after the last
pulse. In the Tomonaga-Luttinger spin liquid, we trace theorigin of the photon echo to a unique “lensing” phenomenon: The first pulse creates a pair of spinons moving in
opposite directions. The second and third pulses change theirdirections of motion. These two excitations thus come backtoward each other and reunite, thereby giving rise to theecho. Dissipation and dispersion effects, which suppress thelensing phenomenon, are sensitively picked up by the echo
signal. This will make the 2DCS a very useful experimental
probe to study these effects, which would be quite difficult
with conventional experimental measurements.
Our work thus uncovers one aspect of the many usesof the nonlinear spectroscopy and related dynamical
phenomena. We believe that more interesting physics is yet
to be explored in the nonlinear responses of strongly correlated systems, and hope that our work will stimulate further
theoretical and experimental studies.
Reference

Fig. 1. Schematic diagram of the photon echo. The first photon createsa pair of fractionalized spinon excitations, the second and third photons
reflect them back, refocusing them to give rise a sharp echo.

[1] Z.-L. Li, M. Oshikawa, and Y. Wan, Phys. Rev. X 11, 031035(2021).

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43

Authors

Z.-L. Lia, M. Oshikawa, and Y. Wana
aInstitute of Physics, Chinese Academy of Sciences
PI of Joint-use project: Y. Wan
Host lab: Oshikawa Group

Pressure-Induced Multicriticality
and Electronic Instability in
the Quasi-Kagome Ferromagnet URhSn
URhSn crystallizes in the hexagonal ZrNiAl-type structure without inversion symmetry. The U atom forms thequasi-kagome structure, in which the magnetic frustrationis potentially expected. The rare-earth based family, suchas CePdAl and YbAgGe, indeed shows the novel magnetic
phase diagram due to this magnetic frustration. In U based
system, the ferromagnetic quantum critical behavior is wellestablished, for example in UCoAl and URhAl, where thewing-shaped temperature-pressure-field phase diagram
associated with the first order metamagnetic transition isdemonstrated.
In URhSn, two successive transitions had been reported
in the previous literature. The one is the ferromagnetic Curie
temperature at TC = 16 K with the relatively large orderedmoment of 2.1 μB directed along c-axis, the other transition occurs at TO = 54 K with the large specific heat jump.
The origin for the latter transition is still unclear from theneutron scattering experiments and Mossbauer spectroscopy,
meaning that the order parameter remains “hidden”. Thus aquadrupole or multipole order is inferred [1].
In this study, we performed the electrical resistivity
measurements under pressure up to 11 GPa [2]. The twotransitions are abruptly switched to the two different transitions at the critical pressure, PC ~ 6.3 GPa, indicating two
bicritical points associated with the Fermi surface reconstructions.
High quality single crystals were grown using the
Czochralski method in a tetra-arc furnace. The obtained
single crystals were then annealed at 800 °C under vacuumfor one month. The residual resistivity ratio (RRR) is about
40, and the de Haas-van Alphen oscillations are successfully
detected, revealing the mean free path of ~1000 Å, indicating
the high quality of our sample. A bar shaped single crystal
was set into a cubic anvil cell for the resistivity measurements at high pressure up to 11 GPa and at low temperatures
down to 2.5 K. The electrical current was applied along the[11-20] direction.
Figure 1 shows the temperature-pressure phase diagram
determined from the resistivity measurements. Two transitions at TC and TO were clearly detected with two kinks in
the resistivity measurements. Interestingly, TO decreases
with pressure, while TC slightly increases up to the criticalpressure, PC ~ 6.3 GPa. Further increasing pressure, TO
increases, displaying a sharp minimum at Pc as a functionof pressure, while TC drops suddenly, and increases again.
These abrupt changes of TC and TO indicate that the firstorder phase boundary exists at PC, shown at the ABC linein the phase diagram of Fig. 1. The residual resistivity
also abruptly increases at Pc and remains the large value,suggesting the drastic change of the electronic state. The
resistivity A coefficient, assuming the T 2 dependence of theresistivity, also shows a sudden increase above PC, which
also supports the drastic change of the electronic state,

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ISSP Activity Report 2021

Fig. 1. Temperature-pressure phase diagram of URhSn.

possibly associated with the Fermi surface reconstruction.
Of course, we don’t know yet what are the order parameters for the different two phases above PC. The present
results, however, reveals the novel pressure-induced
quantum phase transitions. Interestingly, this multicriticality
is possibly related to the higher order multiple order and theassociated multiple phases, which occurs in the 5f-electron
systems without inversion symmetry in the crystal structure.
Further experiments with microscopic probes are required.
References[1] Y. Shimizu, A. Miyake, A. Maurya, F. Honda, A. Nakamura, Y. J.
Sato, D. Li, Y. Homma, M. Yokoyama, Y. Tokunaga, M. Tokunaga, andD. Aoki, Phys. Rev. B. 102, 134411 (2020).
[2] A. Maurya, D. Bhoi, F. Honda, Y. Shimizu, A. Nakamura, Y. J. Sato,
D. Li, Y. Homma, M. Sathiskumar, J. Gouchi, Y. Uwatoko, and D.
Aoki, Phys. Rev. B 104, 195119 (2021).
Authors
D. Aokia and A. Mauryaa
aIMR, Tohoku University
PI of Joint-use project: A. Maurya
Host lab: Uwatoko Group

Pressure-Induced Lifshitz
Transition Observed from
Nuclear Magnetic Resonancein S-Substituted FeSe
We performed 77Se-nuclear magnetic resonance (NMR)
measurements under pressures of up to 3.9 GPa on 12 %S-substituted FeSe and observed a pressure-induced Lifshitz
transition at around 1.0 GPa from the Knight shift (K) andrelaxation rate (1/T1) [1].
FeSe is unique among iron-based superconductors in
the point that small unconnected Fermi surfaces induce
superconductivity without magnetism. The left panel ofFig. 1(a) shows the Fermi surfaces in the tetragonal phase.
The Fermi surfaces consist of the small hole pockets atpoint Γ, k = (0, 0), and anisotropic electron pockets atpoint X, k = (π, 0) or (0, π) [2-4]. The superconductivity
appears in the nematic phase where four-fold rotational

Fig. 1. (a) Schematic Fermi surfaces of pure FeSe in a tetragonalphase theoretically derived at ambient pressure and high pressure. The
Fermi surfaces colored in green, red, and blue represent dxz, dyz, anddxy orbitals, respectively. Arrows indicate the nesting of dxy orbitals
between points M and X. (b) The density of states (DOS) originatingfrom each orbital and the total DOS calculated theoretically for 10%
S-substituted FeSe.

symmetry is broken. Unlike iron-based pnictides, this orbital
configuration reduces the likelihood of nesting between
electron and hole pockets with the same orbital, leading to
the absence of magnetism.
Upon pressure application, FeSe undergoes an antiferromagnetic (AF) order instead of the nematic order [5].
Although the nematic and AF phases are complicatedly
entangled in the pressure versus temperature (P-T) phase
diagram, S substitution makes possible to resolve thecomplex overlap between them [6].
Figure 2(a) shows the P-T phase diagram for 12%
S-substituted FeSe determined from ac susceptibility and
77Se-NMR measurements [1]. A single crystal with dimensions of approximately 1.0mm × 1.0mm × 0.5mm was used
for these experiments. Figure 2(b) shows 1/T1T for thefield parallel to the FeSe plane. The color plot in Fig. 2(a)obtained from 1/T1T provides a measure of low-energy spin
fluctuations. As seen from the color plot, AF fluctuations
below and above 1 GPa are of different origins. Strong AF
fluctuations develop without magnetism in the nematic phase
below 1 GPa, whereas AF fluctuations seem to be weak
above 1 GPa despite of the AF-phase boundary.
The anomaly at 1 GPa is also observed in the shift K.
The NMR spectra at 60 K and K at 60 and 70 K are shown in
Fig. 3(a) and 3(b), respectively. The shift is decomposed as
K = Korb + Kspin where Kspin and Korb represent the spin andorbital parts, respectively. The former and latter are T-dependent and T-independent, respectively. The orbital part Korb isFig. 2. (a) Color plot of relaxation rate divided by temperature (1/T1T).
The superconducting (SC) phase shows a double-dome structure at 6.02
T. TCs shown by circles and inverted triangles are determined fromAC susceptibility measurements at 0 T and 6.02 T, respectively. Bothnematic and SC orders are absent at 1.0 GPa at 6.02 T. (b) T dependence of 1/T1T measured at 6.02 T for the field parallel to the FeSe
plane. TCs shown by arrows are the same with those in Fig. 2(a).

Fig. 3. (a) Pressure dependence of the NMR spectra at 60 K. Eachspectrum is fitted with a Gaussian function, as indicated by dottedcurves. (b) Pressure dependence of the Knight shift (K) measured at 60
and 70 K. The dotted curves are guides to the eye. (c) Pressure dependence of the spin part of K divided by a2 (Kspin/a2) where a represents
the square of the a-axis lattice constant. In the figure, Kspin/a2 and a2
are normalized by those at ambient pressure. The dashed lines represent
the average of Kspin/a2 at pressure regions below and above 1 GPa.
The results in Fig. 3(c) are comparable to theoretical calculations in
Fig. 1(b).

~ 0.26% at low pressures below 1 GPa and decreases 0.005
and 0.01 % at 2 and 3 GPa, respectively. The decrease athigh pressures is estimated from the decrease in Kspin due
to superconductivity [1]. The spin part Kspin and the uniform
susceptibility χ(0) are related to Kspin = Aχ(0) where A is thehyperfine coupling. Since χ(0) can be described using thedensity of states (DOS) of a 2D free electron system,  Kspin isexpressed as Kspin ∝ (Na)2m/ħ where N 2, a, and m are thetotal number of lattices, lattice constant, and electron mass,
respectively. Two quantities, Kspin /a2 and a2, normalized bythose at ambient pressure are shown in Fig. 3(c).
The step-like enhancement of Kspin /a2 at 1 GPa implies
the appearance of other Fermi surfaces, as expected theoretically at high pressures [4] (See the right panel of Fig. 1(a)).
The results of Kspin /a2 are comparable to the theoreticallycalculated total DOS shown in Fig. 1(b). The Fermi surface
at point M, k = (π, π), is of dxy-orbital origin, leading to thenesting with unconnected Fermi surfaces with the same dxyorbital (See yellow arrows in Fig. 1(a)). In fact, the enhancement of Kspin /a2 seems to be smaller than that shown in
Fig. 1(b), implying that the size of the hole pocket at the
point M is fairly small. This unbalanced nesting would
induce very weak AF fluctuations observed at high pressures
above 1 GPa.
In conclusion, we performed 77Se-NMR measurements
on 12% S-substituted FeSe under pressures of up to 3.9 GPa.
We observed the anomalies of K and 1/T1T corresponding
to the theoretically predicted Lifshitz transition. Our
results suggest that the emergence of the dxy orbital and its
orbital-selective coupling play a key role to understand theelectronic properties of FeSe at high pressures.
References[1] T. Kuwayama, et al., Scientific Reports 11, 17265 (2021).
[2] M. D. Watoson, et al., Phys. Rev. B 91, 155106 (2015).
[3] L. Fanfarillo, et al., Phys. Rev. B 97, 121109 (2018).
[4] Y. Yamakawa, et al., Phys. Rev. B 96, 144509 (2017).
[5] J. P. Sun, et al., Nat. Commun. 7, 12146 (2016).
[6] K. Matsuura, et al., Nat. Commun. 8, 1143 (2017).

ISSP Activity Report 2021

45

Authors
T. Kuwayamaa, K. Matsuurab, J. Gouchi, Y. Yamakawac, Y. Mizukamib,
S. Kasaharaa, Y. Matsudaa, T. Shibauchib, H. Kontanic, Y. Uwatoko,
and N. Fujiwaraa
aKyoto University
bUniversity of Tokyo
cNagoya University
PI of Joint-use project: N. Fujiwara
Host lab: Uwatoko Group

High-Pressure Phase Diagrams of
FeSe1-xTex: Correlation Between
Suppressed Nematicity andEnhanced Superconductivity
The interplay among magnetism, electronic nematicity,and superconductivity is the key issue in strongly correlatedmaterials including iron-based, cuprate, and heavy-fermion
superconductors. Magnetic fluctuations have been widely
discussed as a pairing mechanism of unconventional superconductivity, but recent theory predicts that quantum fluctuations of nematic order may also promote high-temperature
superconductivity. This mechanism of unconventional superconductivity is distinctly different from the one based on
spin fluctuations, and its experimental verification remains
elusive. This is partly due to the closeness between nematicand antiferromagnetic orders in iron-pnictide superconductors, and the enhanced superconductivity can be found nearboth ends of these two ordered phases, where both magnetic
and nematic fluctuations are enhanced. FeSe with a superconducting transition temperature Tc ≈ 9 K serves as an ideal
platform to study the relationship between the nematicity andsuperconductivity, because unlike other iron-based superconductors its nematic order below the structural transition at
Ts ≈ 90 K is accompanied by no magnetic order [1].
In this study, we have succeeded in growing highquality single crystals of FeSe1−xTe x superconductors,
another family of FeSe-based materials, which we use
to study the electronic phase diagram in a wide range ofTe composition under pressure [2]. The single crystals of
FeSe1−xTexwere grown by the chemical vapor transporttechnique, which overcomes the phase separation issue
reported in the previous crystal growth for a low Te composition range. The resistivity and synchrotron X-ray diffraction
measurements show that the electronic nematic transition

Fig. 2. Pressure dependence of Tc, Ts, and Tm indicated by red, blue,and green circles, respectively, for x(Te) ≈ 0.04 (a), 0.06 (b), 0.10 (c),0.14 (d), 0.18 (e), 0.21 (f), 0.38 (g), and 0.50 (h).

temperature Ts is monotonically suppressed with increasing
Te composition. As shown in Fig. 1, the nematic transition can be completely suppressed by ~50% substitution,
while the superconducting transition temperature Tc showsa nonmonotonic composition dependence. We find that thisnonmonotonic dependence of Tc(x) does not correlate withthe x(Te) dependence of residual resistivity ratio, implyingthat the Tc increase found for x(Te) > 0.3 has an intrinsic
origin.
Figure 2 shows the high-pressure phase diagramsof FeSe1−xTex up to 8 GPa determined by the resistivity
measurements performed by using the constant-load cubic
anvil cell in Uwatoko group, ISSP, University of Tokyo.
When Te composition x(Te) becomes larger than 0.1, thehigh-pressure magnetic order disappears, whereas thepressure-induced superconducting dome near the nematic
end point is continuously found up to x(Te) ≈ 0.5. In contrast
to FeSe1−xSx, enhanced superconductivity in FeSe1−xTex
does not correlate with magnetism but with the suppression of nematicity. It is generally expected that the quantum
fluctuations of electronic order are intensified near the end
point of the associated order, so in the present case, nematicfluctuations are expected to be enlarged when the nematicorder is suppressed wither by the Te substitution or pressure.
Our results show that the superconducting dome exists near
the end point of nematic order in FeSe1−xTex, near which
we have no magnetic order. These results highlight theparamount role of nonmagnetic nematic fluctuations forhigh-temperature superconductivity in this system.
References[1] See, for a review, T. Shibauchi, T. Hanaguri, and Y. Matsuda, J.
Phys. Soc. Jpn. 89, 102002 (2020).

[2] K. Mukasa, K. Matsuura, M. Qiu, M. Saito, Y. Sugimura, K.
Ishida, M. Otani, Y. Onishi, Y. Mizukami, K. Hashimoto, J. Gouchi,
R. Kumai, Y. Uwatoko, and T. Shibauchi, Nat. Commun. 12, 381(2021).
Authors
K. Mukasaa, K. Matsuuraa, M. Qiua, M. Saitoa, Y. Sugimuraa, K.
Ishidaa, M. Otania, Y. Onishia, Y. Mizukamia, K. Hashimotoa, J.
Gouchi, R. Kumaib, Y. Uwatoko, and T. Shibauchia
aThe University of Tokyo
bKEK
PI of Joint-use project: T. Shibauchi
Host lab: Uwatoko Group
Fig. 1. a, Nematic and superconducting transition temperatures as afunction of Te composition x(Te). The blue and red circles represent
the nematic (Ts) and superconducting (Tc) transition temperatures,
respectively, determined by the resistivity measurements. The light blue
triangles represent Ts, determined by the splitting of the Bragg peaks in
the XRD measurements. b, The same as in a, but the temperature range
is 0–20 K.

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ISSP Activity Report 2021

Topological Spin Orders
in a Centrosymmetic Tetragonal
Magnet EuAl4 Investigatedby Polarized Neutron Scattering
Topologically nontrivial magnetic orders have been
intensively investigated since the pioneering work onmagnetic skyrmion lattice in MnSi, in which DzyaloshinskiMoriya (DM) interactions arising from the chiral crystal
structure and ferromagnetic interactions lead to long-period
modulated magnetic orders including the skyrmion latticestate. Therefore, the early studies on magnetic skyrmions
were focusing mainly on ferromagnetic systems with broken
spatial inversion symmetry. However, a recent study on anitinerant triangular lattice magnet Gd2PdSi3 [1] has revealed
that centrosymmetric system can host magnetic skyrmion
lattice owing to frustration in magnetic interactions or
coupling between local magnetic moments and conduction electrons. In fact, subsequent studies have found theemergence of skyrmion lattice states in centrosymmetricmagnets.
In the present study, we have found that EuAl4, whichis also a centrosymmetric magnet, exhibits two distinct
skyrmion lattice states in magnetic field [2]. This system has
a tetragonal crystal structure belonging to the space group of
I4/mmm. By applying magnetic field along the c axis below
15 K, the system shows successive field-induced phasetransitions, which is accompanied by anomalies in Hall resistivity. This is indicative of the topological Hall effect arisingfrom a non-coplanar magnetic structure like skyrmion latticestate. To determine the magnetic structures in the fieldinduced phases, we performed polarized neutron scatteringin a magnetic field at TAIKAN instrument (BL15) in thematerials and life science experimental facility in J-PARC.
By utilizing supermirror neutron spin polarizer and analyzer,
we measured spin-flip and non-spin-flip scattering intensities
of magnetic Bragg reflections appearing in the small-angle
region in a magnetic field of 1 T with varying temperature.
As a result, we found that this system exhibits rhombic andsquare lattices of Bloch-type magnetic skyrmion lattices in amagnetic field. We have further investigated magnetic phasetransitions in zero magnetic field using the polarized tripleaxis neutron spectrometer PONTA in JRR-3. The spectrometer was operated in the Pzz longitudinal polarization analysis
mode, in which the polarization direction of the neutron

Fig. 1. Temperature dependence of spin-flip and non-spin-flip intensities of magnetic Bragg reflections in EuAl4 measured by PONTA
spectrometer in JRR-3.

spins was set to be perpendicular to the horizontal scattering
plane. Figure 1 shows the summary of the measurements at
PONTA. We have identified four magnetic phases below 15
K in zero field. Phase I and V have the magnetic modulation wave vectors (q-vectors) of (q,0,0), while phase IV does
(q,q,0). By analyzing the neutron spin polarization of thescattered neutrons, the low temperature phases (I and V) andthe highest temperature phase (IV) are found to have screwtype and fan-type magnetic modulations, respectively. Interestingly, the intermediate phase, phase VI, has both (q,0,0)and (q,q,0) wave vectors. By assuming a multi-q magnetic
order in this phase, a superposition of these wave vectors(and their counterparts (0,q,0) and (q,–q,0)) results in another
topologically-nontrivial magnetic order, which is distinct
from the well-known magnetic skyrmion lattice state. We
would also like to emphasize that the modulation periods ofthese incommensurate magnetic orders are relatively short,specifically, 2-3 nm, which cannot be resolved by Lorentz
transmission electron microscope. The present study also
demonstrates that polarized neutron scattering is quite usefulto study short-period topological magnetic orders.
References[1] T. Kurumaji et al., Science. 365, 914 (2019).
[2] R. Takagi et al., Nat. Commun. 13, 1472 (2022).
Authors
R. Takagia, N. Matsuyamaa, V. Ukleevb, L. Yub, J. S. Whiteb, S.
Francoualc, J. R. L. Mardeganc, S. Hayamia, H. Saito, K. Kanekod, K.
Ohishie, Y. Ōnukif, T. Arimaa, Y. Tokuraa,f, T. Nakajima, and S. Sekia
aThe University of Tokyo
bPaul Scherrer Institute
cDeutsches Elektronen Synchrotron (DESY)
dJapan Atomic Energy Agency (JAEA)
eComprehensive Research Organization for Science and Society(CROSS)fRIKEN-CEMS
PI of Joint-use project: R. Takagi
Host lab: Neutron Science Laboratory

High Field Quantum Phase in
the Chromium Spinel Oxide HgCr2O4
The spin nematic state, which has long been discussed
for magnets with frustrated interactions, is a spin analog of
the nematic state in a liquid crystal. In this unconventional
magnetic state, the fluctuations of spins, behaving like rodor disk-shaped molecules, spontaneously select a preferred
direction without conventional magnetic order. In this study,
we have confirmed a possible spin nematic order in thechromium spinel oxide HgCr2O4 This compound is known
as a highly frustrated pylochlore antiferromagnet with significant spin-lattice coupling. In fact, the wide half-magnetization plateau, which was stabilized by the lattice distortion,
was reported in HgCr2O4 [1]. The magnetization process
in the chromium spinel oxides has been accounted for theclassical model with the bilinear and biquadratic interactions,derived by integrating out the lattice degrees of freedom[2]. However, the result of previous high field magnetization measurements indicated the existence of a phase, whichcannot be explained by the classical model, just below
the saturation field Hc4 [3]. From the subsequent theory,
this unknown phase was suggested to be the spin nematic
phase, which is stabilized by the interplay of the spin-latticecoupling, geometrical spin frustration and quantum fluctuation [4]. To gain thermodynamic evidence for the existence

ISSP Activity Report 2021

47

of the magnetic ordering in the phase just below Hc4, wehave performed the specific heat and the magnetocaloric
effect measurements under pulsed high magnetic fields up
to 42 T [5]. Figure 1 shows the results of the magnetocaloric
effect measurements. The sharp dips at Hc3 ~ 37 T and Hc4 ~40 T in the magnetocaloric effect under the quasi-isothermal
condition unambiguously exhibit the magnetic phase for
Hc3 < H < Hc4, whereas the fact that only a small kink isobserved at Hc3 under the quasiadiabatic condition indicatesthat the phase between Hc3 and Hc4 is gapless. From a peakof the specific heat at 38.5 K, we have also confirmed theordering for Hc3 < H < Hc4. From these thermodynamic
measurements, we have obtained the magnetic field andtemperature phase diagram, shown in Fig. 4. In the Heisenberg-type pyrochlore lattice magnet, the lowest-energy
magnon states in a fully spin-polarized region above thesaturation field are localized with flat dispersions owing to
the geometrical configuration of the lattice. Therefore, thehopping of the single lowest-energy magnon is prohibited,
thereby preventing kinetic energy gain. Meanwhile the spinlattice coupling in HgCr2O4 brings the effective biquadraticinteraction in Eq. (1). This biquadratic interaction contains
a term (Si − )2(Sj+)2, which induces hopping of a two-spin
flipped state on a Cr3+ site to the nearest neighbor sites.
Because of this hopping term, the two-magnon bound state

becomes stable and has a lower energy than two independent localized magnons in the fully polarized spin state.
Decreasing the magnetic field in the fully polarized spinstate causes softening of the two-magnon bound state. Then,the bound state touches to the ground state at the saturation field, resulting in its condensation, which leads to thespin nematic state. According to the calculation, the spincomponent distribution, of which the projection to the plane
perpendicular to the magnetic field has an ellipsoid shape,is aligned owing to the spin nematic order, thereby breaking
the rotational symmetry around field. From our experimental
results that suggest the existence of the gapless magnetic
ordered phase between Hc3 and Hc4, we consider that sucha spin nematic order most probably appears in HgCr2O4.
The existence of an unknown magnetic phase just below
the saturation was also reported for other chromium spineloxides, CdCr2O4 and ZnCr2O4 from high-field experiments
It is possible that the appearance of the spin nematic phase isof universal nature in chromium spinel oxides.
References[1] H. Ueda, H. Mitamura, T. Goto, and Y. Ueda, Phys. Rev. B 73,
094415 (2006).
[2] K. Penc, N. Shannon, and H. Shiba, Phys. Rev. Lett. 93, 197203(2004).
[3] S. Kimura, M. Hagiwara, T. Takeuchi, H. Yamaguchi, H. Ueda, Y.
Ueda, and K. Kindo, Phys. Rev. B 83, 214401 (2011).
[4] E. Takata, T. Momoi, and M. Oshikawa, arXiv:1510.02373.

[5] S. Kimura, S. Imajo, M. Gen, T. Momoi, M. Hagiwara, H.
Ueda, and Y. Kohama, Phys. Rev. B 105, L180405 (2022).
Authors
S. Kimuraa, S. Imajo, M. Gen, T. Momoib, M. Hagiwarac, H. Uedad,and Y. Kohama
aTohoku University
bRIKEN
cOsaka University
dKyoto University

PI of Joint-use project: S. Kimura
Host lab: Kindo and Kohama Groups

A portable 77 Tesla Generator “PINK”
for Novel Quantum Beam Experiments
Fig. 1. Magnetocaloric effect of HgCr2O4, observed under quasiadiabatic condition. The inset shows that obtained under a quasiisothermal condition.

Fig. 2. Magnetic field and temperature phase diagram of HgCr2O4,
obtained from thermodynamic experiments. Squares, circles, and triangles are the transition points obtained from the magnetocaloric effect,
temperature, and field dependencies of the specific heat, respectively.
Dashed curves are drawn as guides for the eyes.

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ISSP Activity Report 2021

The high magnetic field beyond 100 T is a promising
tool to induce and uncover hidden or magnetic properties ofmaterials thanks to its large Zeeman energy, that amounts to134 K at 100 T for an electron spin of 1/2. However, experimentally, its usage is greatly regulated. First, the generationof B well above 100 T is principally difficult, being restricted
to the destructive pulse magnets, where high magnetic fields
last only a few μ-seconds, and a large explosion and electromagnetic noises accompany. Second, the experimental probeof material properties is limited. To overcome this situations, young researchers have made great effort for making
possible to conduct electric resistivity, magnetization, ultrasound and magnetostriction measurements. Ikeda et al.,realized the magnetostriction measurement by using fiber
Bragg grating technique and optical filter method, which isuseful up to 1000 T range generated using electromagnetic
flux compression method.
All these techniques are restricted to macroscopic
measurements. In condensed matter physics, microscopic
measurements and macroscopic ones complement witheach other. Thus, microscopic measurements are in great
demand. Recent single shot quantum beams like x-ray freeelectron laser (XFEL) [1] and femto-second Terahertz pulsetechniques are in principle applicable for such purposes.
However, the 100 T and 1000 T generators are built in a few
large facilities. Besides, they are regularly occupied by dailyexperiments. For this reason, it is unable to move it to the
x-ray facilities, or it is possible one to occupy the experimental site for developing new measurement only when thedeveloping set-up is easily removable from the site.
This problem is solved if the ultrahigh magnetic field
generator becomes portable. In the present study we havedeveloped an ultrahigh magnetic field generator called
PINK-01 (Portable INtense Kyokugenjiba with numbering01). PINK-01 is shown to generate 77 T with a single turn
coil with a 2.5 mm bore. We have carried PINK-01 to the
XFEL facility SACLA in Japan. We have succeeded in
obtaining XRD of powdered Bi0.5Ca0.5MnO3 under 77 T
where the charge ordered insulator phase is melted by themagnetic field inducing the forced ferromagnetic metallic
phase. We clearly observe the lattice state change by thephase transition. We are now building new set up PINK-02
for 100 T generation and low temperature experiment with
XFEL. Microscopic change of lattice will be uncovered inmany kinds of materials at 100 T soon [2].

Fig. 1. Schematic image of PINK-01 and the electric circuit.

References[1] A. Ikeda, Y. H. Matsuda, X. Zhou, T. Yajima, Y. Kubota, K. Tono,
and M. Yabashi, Phys. Rev. Research 2, 043175 (2020).

[2] A. Ikeda, Y. H. Matsuda, X. Zhou, S. Peng, Y. Ishii, T. Yajima,
Y. Kubota, I. Inoue, Y. Inubishi, K. Tono, and M. Yabashi, Appl.
Phys. Lett., 120, 142403 (2022).

Authors
A. Ikedaa, Y. H. Matsuda, X. Zhou, S. Peng, Y. Ishii, T. Yajima, Y.
Kubotab, I. Inoueb, Y. Inubishib,c, K. Tonob,c, and, M. Yabashib,caUniversity of Electro-Communications
bRIKEN SPring-8 Center
cJapan Synchrotron Radiation Research Institute
PI of Joint-use project :A. Ikeda
Host lab: Y. H. Matsuda Group and X-ray Laboratory

Field-Induced Multiple Metal-Insulator
Crossovers of Correlated Dirac
Electrons of Perovskite CaIrO3
The quantum phenomena of high-mobility relativistic
electrons are issues of great interest in the modern condensed
matter physics. So far, the quantum phenomena of relativistic
electrons have been extensively studied in Dirac semimetals
in which the electron correlation effect is small, but there
is a growing interest in the quantum phenomena due tothe strong electron correlations. One of fertile grounds tostudy this issue is the magnetically induced quantum limit(QL) in which the electrons are quasi-one-dimensionallyFig. 2. (a) A photo, (b) synchronization between B pulse and XFEL
pulse, and (c) a part of Debye-Scherrer ring of Bi0.5Ca0.5MnO3 withand without magnetic field of 65 T.

Fig. 1. (a) Quasi-one-dimensional confinement under high magnetic
field in the quantum limit. (b) Schematic illustration of Dirac like
dispersion near the line node.

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49

(1D) confined under a sufficiently strong magnetic field
B. In the QL, electrons in the lowest Landau level with
the index n = 0 are confined in a scale of magnetic length−lB = √ ħ/eB within a plane perpendicular to the magnetic
field, while the momentum along the magnetic field ispreserved (Fig. 1(a)). Previous theoretical studies proposedthat nontrivial phases such as the axion charge density wave
(CDW) and excitonic insulator can be induced, if the QL of
the Dirac/Weyl electron can be realized in materials withthe strong electron correlation [1]. However, the experimental realization of quantum limit in the strongly correlated
electron material is a challenge and hence it has rarely been
explored so far.
In this context, the correlated Dirac semimetal ofperovskite CaIrO3 provides an ideal arena to study thecollective phenomena of high-mobility relativistic electrons
in the QL. It has been proposed that the electron pocket
emerging around U-point in the Brillouin zone of CaIrO3
is caused by the Dirac band dispersion with a closed linenode protected by the nonsymmorphic crystalline symmetry(Pbnm), as illustrated in Fig. 1(b). Recently, it has beenshown that the line node is precisely tuned close to EF(~10 meV below EF) and yields the Dirac electrons withdilute carrier density (less than 2 × 1017 cm-3) and highmobility exceeding 60,000 cm2V -1s -1 due to strong electron
correlations in the proximity to the Mott criticality [2]. As
a result, the correlated Dirac electrons reach the QL at amodest magnetic field less than 10 T. However, the transport
property in the QL of this material has not been explored sofar, and a possibly striking feature of collective phenomenaof the Dirac electrons remains elusive.
In this study, we have investigated the quantum limit
transport of correlated Dirac electrons in the perovskite
CaIrO3 by means of magneto-transport measurements up to
55 T and theoretical calculations [3]. In the QL, the magnetoresistivity steeply increases around 10 T and the insulatingstate with a finite energy gap emerges around 18 T (Fig. 2).
By further increasing the magnetic field, both the gap andresistivity dramatically decrease, resulting in the quasi-1D
metallic state in the deep QL regime. The non-monotonic
field dependence of the gap suggests that the field-induced
insulating state originates from the collective electronicordering, likely the charge density wave or spin density
wave driven by the Fermi surface instability inherent to
the quasi-one-dimensional n = 0 Landau levels with theFig. 2. The contour plot of resistivity as a function of temperature andmagnetic field. The density wave and quasi-one-dimensional metallic
phase may appear in the quantum limit of Dirac electrons around theline node.

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ISSP Activity Report 2021

enhanced density of states under the magnetic field. The
field-induced crossover between the metallic state and the
gapped state appears in the fairly low magnetic field regime(10-30 T) among the conventional semimetals, highlighting
the highly field-sensitive character of strongly correlated
Dirac electrons relevant to the Mott criticality.
References[1] Z. Pan and R. Shindo, Phys. Rev. B 100, 165124 (2019).
[2] J. Fujioka, R. Yamada, M. Kawamura, S. Sakai, M. Hirayama,
R. Arita, T. Okawa, D. Hashizume, M. Hoshino, and Y. Tokura, Nat.
Commun. 10, 362 (2019).

[3] R. Yamada, J. Fujioka, M. Kawamura, S. Sakai, M. Hirayama,
R. Arita, T. Okawa, D. Hashizume, T. Sato, F. Kagawa, R.
Kurihara, M. Tokunaga, and Y. Tokura, npj Quantum Mater. 7, 13(2022).
Authors
R. Yamadaa, J. Fujiokab, M. Kawamurac, S. Sakaic, M. Hirayamaa,c,R. Aritaa,c, T. Okawaa, D. Hashizumec, T. Satoc, F. Kagawaa,c, R.
Kurihara, M. Tokunaga, and Y. Tokuraa,caThe University of Tokyo
bTsukuba University
cCEMS RIKENPI of Joint-use project: J. Fujioka
Host lab: Tokunaga GroupNMR Relaxation Time Measurements
in Pulsed Field
Interesting electronic states are frequently found inmagnetic fields, where magnetic interactions inherent inmaterial compete with magnetic energy provided by theexternal magnetic fields. To cause significant impact on theelectronic state, extremely high magnetic fields generated by
the pulsed-field technology should be applied to the material.
The recent advances in pulsed-field technology allow us toaccess novel field-induced quantum states by its ability togenerate extreme magnetic fields. However, various experiments in pulsed field have been a challenge because of theshort duration of field generation time. In this work, weincorporate a versatile NMR spectrometer with the dynamically controlled pulsed field to perform NMR measurementin pulsed field and demonstrate the nuclear spin-lattice andspin-spin relaxation rate measurements.
NMR experiment in pulsed field was difficult because theresonant frequency determined by the external field strength
continuously and rapidly changes following the pulsedfield profile. Previously the field-sweep NMR spectrum
has been obtained by quickly recording the NMR intensity
during the rapid variation of field strength [1,2]. To achievea sufficiently long measurement time, which is determinedby the total pulse width, a large-scale electromagnet with along time duration of typically ~100 ms has been used for
the NMR experiment. In contrast, we combined our NMR
spectrometer with the “flat-top” pulsed field; a novel type of
pulsed field realized by controlling the pulsed-field strength
dynamically [3]. Since the field drift can be suppressed toless than 100 ppm during when the pulsed field is under
the feedback control, we can perform any conventional
NMR measurements developed for the steady fields evenin a rather short time duration of ~30 ms. Since a smaller
energy is required to generate a shorter pulsed field, thisdevelopment facilitates the pulsed-field NMR experiment inany kinds of pulse magnets, such as a portable pulsed-field
generator installed in a small laboratory.

The most important advantage of the flat-top pulse
is that the relaxation of physical quantities can be traced
during the quasi-steady field state. With this feature, we canperform the nuclear spin-lattice relaxation time T1 measurement with conventional saturation-recovery method, which
was believed to be impossible in pulsed field. In addition to
the quasi-steady condition of the magnetic fields, we needhigh reproducibility of field strength to obtain the relaxation
profile of the nuclear magnetization. As the spin-echo pulses
to observe NMR signal disturb the nuclear spin states, weneed to repeat several NMR measurements with various
delays between the saturation and the spin-echo pulses at
independent pulsed fields. We confirmed the reproducibilityof field strength and the NMR intensity by repeating 10
independent field pulses and by measuring 65Cu-NMR signal
with the same condition at each pulse [4]. Encouraged by thehigh reproducibility of flat-top pulse we performed the T1
measurement for a metallic antiferromagnet CrB2, and theobtained relaxation profile is shown in Fig.1(a) as the filled
symbols. The open symbols are the result obtained at thesame field in a real-steady condition. The agreement between
the results in pulse and steady fields manifests the feasibilityof relaxation time measurement in pulsed fields. However,as the total pulse duration was ~30 ms for the pulse magnet
used in the current study, the accessible time scale of T1 islimited up to ~4 ms which is usually too short to achieve thethermal equilibrium state. To solve this issue, we are now
working to implement the NMR spectrometer to a larger
pulse magnet with longer pulse duration, which will allow
us to extend the accessible time scale of T1. We also successfully performed the nuclear spin-spin relaxation time T2
measurement with the same setup [5]. As the typical times-

cale for T2 is shorter than 1 ms, T2 measurement is moresuitable for pulsed fields. Figure 1 (b) shows the T2 decay
profiles obtained in the pulsed field (filled) and steady field(open). The consistent results again confirm the feasibility of
T2 measurement in pulsed fields.
Besides the T1 and T2 measurements, combination ofversatile NMR spectrometer and flat-top pulse enables thefrequency-sweep NMR spectrum measurement and theconstant-rate field-sweep NMR spectrum measurement.
[4,5] With these developments, microscopic magnetism inmaterials can be unveiled up to very high magnetic fields. So
far, microscopic experiment that can be performed at suchhigh magnetic field is still limited. Our pulsed-field NMR
technique developed here will provide crucial information tounderstand the field-induced quantum states.
References[1] J. Kohlrautz, J. Haase, E. L. Green, Z. T. Zhang, J. Wosnitza, T.
Herrmannsdörfer, H. A. Dabkowska, B. D. Gaulin, R. Stern, and H.
Kühne, J. Magn. Reson. 271, 52 (2016).
[2] A. Orlova, E. L. Green, J. M. Law, D. I. Gorbunov, G. Chanda,
S. Krämer, M. Horvatić, R. K. Kremer, J. Wosnitza, and G. L. J. A.
Rikken, Phys. Rev. Lett. 118, 247201 (2017).
[3] Y. Kohama and K. Kindo, Rev. Sci. Instrum. 86, 104701 (2015).
[4] Y. Ihara, K. Hayashi, T. Kanda, K. Matsui, K. Kindo, and Y.
Kohama, Rev. Sci. Instrum. 92, 114709 (2021).

[5] Y. Kohama, T. Nomura, S. Zherlitsyn, and Y. Ihara, submitted to
J. Appl. Phys.
Authors
Y. Iharaa, K. Hayashia, T. Kanda, K. Matsui, K. Kindo, and Y. Kohama
aHokkaido University
PI of Joint-use project: Y. Ihara
Host lab: Kindo and Kohama Groups

Time-Resolved X-Ray Photoelectron
Diffraction Using an Angle-Resolved
Time-of-Flight Electron Analyzer

Fig. 1. Recovery (a) and decay (b) profiles of nuclear magnetization measured for a metallic antiferromagnet CrB2. The filled (open)
symbols are the data obtained in pulsed (steady) fields. Consistent
results in both cases confirm the feasibility of relaxation measurementin flat-top pulse. Insets are the sketches of the NMR pulse sequencesused for corresponding measurements.

Photoelectron spectroscopy (PES) is a powerful experimental approach for investigating chemical composition,
electronic states, and atomic structure of a material. Recently,
the PES measurement method is conducted with temporal
resolutions and the experiment becomes a successful method
to track these quantities during the dynamical events of asample. At SPring-8 BL07LSU, such a time-resolved PES
technique is developed and the beamline endstation has been
opened for users. In the present research, we combined itwith angular resolution and demonstrated a time-resolved
experiment of X-ray photoelectron diffraction (XPD) [1].
The time-resolved measurements were performed bya pump-probe method that combined synchrotron radiation (SPring-8 BL07LSU) and laser (BL07LASER) pulses[2,3]. Photon energy of synchrotron radiation was set at
hv = 300eV, while that of laser at hv = 1.55 eV. Angleresolved spectra were obtained with a two-dimensionallyangle-resolved time-of-flight (2DARTOF) analyzer [3]. The
photoelectrons, detected by the 2D delay line detector, wererecorded at the arrival time (t) and position (x, y), subsequently converted into energy (E) and 2D emission angle(θx, θy). A demonstration experiment was made on a silicene
layer, a honeycomb lattice of Si atoms, on a ZrB2 substrate.
Figures 1 (a) and 1 (b) show the Si 2p XPD patterns of two
atomic sites, α and β, in the silicene. The two sites appear
at different binding energies of PES, as shown in Fig. 1 (c).
One can find in Fig.1 (a,b) that the experimental XPD pattern

ISSP Activity Report 2021

51

Fig. 1. (a,b) XPD patterns of the Si 2p core levels at the α and β sites in(c) XPS spectrum. (d) Time-resolved XPS pattern of the β site taken atvarious delay times [1].

is reproduced by the simulation. Focusing on the pattern atthe β site, the temporal variation can be detected after thedelay time. As presented in Fig. 1(d), the features, labeled A
and B, shows temporal changes, weakening, disappearance,and recovery, during sub-nanoseconds (ns) to 10 ns. These
results indicate that the time-resolved XPD experiment canbe effectively made with a 2DARTOF analyzer. The novel
approach is useful to examine the structural changes during
dynamical events, such as photocatalysis and photo-induced
phase transition.
References[1] A. K. Ang, Y. Fukatsu, K. Kimura, Y. Yamamoto, T. Yonezawa, H.
Nitta, A. Fleurence, S. Yamamoto, I. Matsuda, Y. Yamada-Takamura,and K. Hayashi, Jpn. J. Appl. Phys. 59, 100902 (2020).
[2] J. Miyawaki, S. Yamamoto, Y. Hirata, M. Horio, Y. Harada, and I.
Matsuda, AAPPS Bulletin 31, 25 (2021).
[3] M. Ogawa et al., Rev. Sci. Instrum. 83, 023109 (2012).
Authors
K. Hayashia and I. Matsuda
aNagoya Institute of Technology
PI of Joint-use project: K. Hayashi
Host lab: I. Matsuda Group52

ISSP Activity Report 2021

ISSP Activity Report 2021

53

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
for supercomputer-aided research projects and hosts theSteering Committee, as mentioned below, that evaluates the
proposals.
The ISSP supercomputer system consists of two subsystems: System B, which was last replaced in Oct. 2020, isintended for larger total computational power and has morenodes with relatively loose connections whereas System C
is intended for higher communication speed among nodes.
System B (ohtaka) consists of 1680 CPU nodes of AMD
EPYC 7702 (64 cores) and 8 FAT nodes of Intel Xeon
Platinum 8280 (28 cores) with total theoretical performanceof 6.881 PFlops. System C (enaga) consists of 252 nodes of
HPE SGI 8600 with 0.77 PFLOPS, which stopped operationin Dec. 2021 for replacement. The new machine (kugui),which consists of 128 nodes of AMD EPYC 7763 (128cores) and 8 nodes of AMD EPYC 7763 (64 cores) with total
theoretical performance of 0.973 PFLOPS, will start operation in June 2022.

In addition to the hardware administration, theSCC puts increasing effort on the software support.
Since 2015, the SCC has been conducting “Project foradvancement of software usability in materials science(PASUMS).”In this project, for enhancing the usabilityof the ISSP supercomputer system, we conduct
several software-advancement activities: developing
new application software that runs efficiently on theClass

Max Points
SystemB

A

Application

SystemC

ISSP supercomputer system, adding new functions toexisting codes, help releasing private codes for publicuse, creating/improving manuals for public codes, etc.
Three target programs were selected in fiscal year 2021
and developed or enhanced the ustablity of software
were released as (1) ESM-RISM (proposal made by
M. Otani (AIST)), and (2) 2DMAT (proposal made by
T. Hoshi (Tottori Univ.)). In 2021, we also started thedata repository service for storing results of numericalcalculation and enhancing their reusability.

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 2021, totally 321 projects were approved including theones under the framework of Supercomputing Consortiumfor Computational Materials Science (SCCMS), which
specially supports FUGAKU and other major projects incomputational materials science. The total points applied andapproved are listed on Table. 1 below.
The research projects are roughly classified into thefollowing three (the number of projects approved, notincluding SCCMS):First-Principles Calculation of Materials Properties (142)
Strongly Correlated Quantum Systems (29)
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 2020' 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

Numberof
Projects

SystemB

Approved
SystemC

1.7k

SystemB

0.7k

SystemC

100

50

any time

B

1k

100

twice a year

96

68.0k

5.3k

37.9k

4.1k

C

10k

1k

twice a year

169

1053.3k

79.6k

532.4k

57.4k

D

10k

1k

any time

3

16.0k

0k

13.5k

0k

E

30k

3k

twice a year14

323.0k

31.2k193.0k

22.7k

twice a year

0

0k

0k

0k

0k

SCCMS

22

54.1k

7.4k

54.1k

7.4k

Total

321

1516.1k

124.2k

832.6k

92.3k

S

17

Total Points
Applied

1.7k

0.7k

Table 1: Research projects approved in Academic Year 2021.
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 nodes require
four points for a 1-node 24-hours use.

54

ISSP Activity Report 2021

2020, the following three invited papers are included:
1.
2.

3.

"Theory, practice, and application of the van der
Waals density functional”, Ikutaro HAMADA(Osaka U.)"Development of permanent magnet materials-from the view point of first-principles calculation",
Hisazumi AKAI (ISSP) and Shinji TSUNEYUKI(Univ. Tokyo)"Development of Bayesian optimization tool and its
applications in materials science", Ryo TAMURA(NIMS), Yuichi MOTOYAMA (ISSP), and Kazuyoshi YOSHIMI (ISSP)
Fig. 2. Schematic view of HRC.

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 (GUP) for theuniversity-owned various neutron scattering spectrometers
installed at the JRR-3 (20 MW) operated by Japan Atomic
Energy Agency (JAEA) in Tokai, Ibaraki (Fig. 1). In 2003,
the Neutron Scattering Laboratory was reorganized as the
Neutron Science Labora­tory to further promote the neutronscience with use of the instruments in JRR-3. Under GUP
supported by NSL, 12 university-group-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 beam line
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 momentum transfer(0.03 Å-1 < Q < 30 Å-1) ranges, and therefore becomescomple­mentary to the existing 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 resolu­
tion 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 soft-matterscience. Our GUP has produced 2076 publications and 285
dissertations until February 28, 2022. 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. From FY2012
to FY2020, NSL have managed User-Program Supports forOverseas Experiments. 398 people (for 297 proposals) have
performed their experiments in various foreign facilities andpublished 118 papers (as for February 28, 2022). The lists forthis program 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 was the main foreign
facility for the User-Program Supports for Overseas Experiments.
It was really good news that JRR-3 restarted in February
2021 after long shutdown and the normal GUP came backfrom July 2021. During the shutdown period, we made a lotof 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 installationof non-magnetization neutron shield. The neutron guides
in the Guide Hall have also been upgraded by replacing
the existing ones with super-mirror guides. These upgrades
should result in increase in neutron beam flux several times.
For example, the neutron intensity of AGNES (high resolution cold neutron spectrometer) increased seven times. The
sample environments such as cryostat and pressure cells havealso been upgraded. We had 4 operation cycles and 91 daysof beam time in 2021. 107 experiments, selected from 176
proposals by NSPAC, were performed and many significant
results were obtained.

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

ISSP Activity Report 2021

55

International MegaGauss
Science Laboratory
The objective of this laboratory (Fig. 1) is to study thephysical properties of solid-state materials (such as metals,
semiconductors, insulators, superconductors, and magnetic
materials) in a high magnetic field of 100 T or even higher.
Such a high magnetic field can control material phases andfunctions. Our pulsed magnets, at moment, can generate up
to 87 Tesla (T) by non-destructive manner, and up to 1200
T by destructive manner. The world record indoor magnetic
field 1200 T was achieved in 2018. The laboratory is opened
for scientists in domestic as well as from overseas. Lots offruitful results have come out not only from the collaborative
researches but also from our in-house activities.

Fig. 1. The building C of the IMGSL.

Building C
Room
101-113

Bmax

Type

ElectroMagnetic
Flux Compression

Destructive

Horizontal
Single-turn Coil

Destructive

300 T
200 T

10 mm
6μs
5 mm
10 mm

VerticalSingle-turn Coil

Destructive

300 T
200 T

8μs
5 mm
10 mm

1200 T

60 T
Building C
Room
114-120

Building C
Room 121

Pulse width
Bore

Alias

3μs

(100-1200T)

Power source

Applications

Others

5 MJ, 50 kV
2 MJ, 50 kV

Magneto-Optical
Magnetization

5 K – room
temperature

0.2 MJ, 50 kV

Magneto-Opticalmeasurements
Magnetization

5 K – room
temperature

0.2 MJ, 40 kV

Magneto-Optical
Magnetization

2 K – room
temperature

0.9 MJ, 10 kV

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

40 ms
18 mm

Mid-pulse Magnet Non-destructive
70 T

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 othermagnetic materials. One of our ultimate goals is to provide
the joint-research users with a 100 T millisecond-long pulse
using a non-destructive magnet, and to offer versatile highprecision physical measurements. Measurable physicalquantities or properties are magneto-optical spectra, magnetization, magnetostriction, electrical transport, specific heat,
nuclear magnetic resonance, and ultrasound propagation.
They can be carried out with sufficiently high accuracy.
Another ultimate goal is to extend the magnetic field region
and discover novel phenomena happening only in extremely
strong magnetic fields exceeding 100 T. Recent technicaldevelopments allow us to even measure magnetostriction
and ultrasound propagation in the destructive magnetic
fields over 100 T, that can directly reach potential structuralchanges in the ultrahigh magnetic fields. Recent discovery ofmagnetic field induced insulator-metal transitions of strongly
correlated materials in 500 T would open new direction of
the megagauss field research, namely exploration of fieldinduced novel phases in materials with strong interactions
comparable to thermal energy of a room temperature.
A 210 MJ flywheel generator (Fig. 2), which is the world
largest DC power supply (recorded in the Guinness Book ofWorld Records) was installed in the DC flywheel generator
station at our laboratory, and used as an energy source ofsuper-long pulse magnets. The magnet technologies areintensively devoted to the quasi-steady long pulse magnet

40 ms
10 mm

PPMS

Steady14 T

ResistanceHeat Capacity

MPMS

Steady7T

Magnetization

87 T(2-stage pulse)

5 ms
10 mm

Short-Pulse Magnet Non-destructive
Building K
Long-Pulse Magnet Non-destructive

86 T

5 ms
18 mm

43.5 T

1s
30 mm

ISSP Activity Report 2021

Lowest temperature
0.1 K

Down to 0.3 K

0.5 MJ, 20 kV

Magnetization
Magneto-Transport

2 K – room
temperature

210 MJ, 2.7 kVResistance
Magneto-Calorimetry

2 K – room
temperature

Table 1. Available Pulse Magnets, Specifications

56

Independent
Experiment in 5 site

Fig. 4. Schematic picture of the V-type single-turn coil equipped witha 40 kV, 200 kJ fast capacitor bank system. The liquid-helium-bathcryostat with a plastic tail is also shown.

Fig. 2. Upper: The K-building for the flywheel generator (left-handside) and a long pulse magnet station (right-hand side). Lower: The
flywheel giant DC generator which is 350 tons in weight and 5 m high(bottom). The generator, capable of a 51 MW output power with the
210 MJ energy storage, is planned to energize the long pulse magnet
generating 100 T without destruction.

(an order 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. Recently, the super-long pulsed magnet has been
intensively used to investigate thermal properties such as
specific heat and magnetocaloric effects.
Magnetic fields exceeding 100 T can only be obtainedwith destruction of a magnet coil. The ultrahigh 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 with theelectromagnetic flux compression (EMFC) system (Fig. 3),
has been completed. Our experimental techniques using thedestructive magnetic fields have intensively been developed. The system which is unique to ISSP in the world scale
is comprised of a power source of 5 MJ main condenserbank and 2 MJ condenser bank. Two magnet stations areconstructed and both are energized from each power source.
Both systems are fed with another 2 MJ condenser bankused for a seed-field coil of which magnetic flux is to becompressed. The 2 MJ EMFC system can generate 450 T.
The 5 MJ system is used for generation of 1000 T-class

Fig. 3. A view of the coil setup of the electromagnetic flux compression inside of an anti-explosive house. The world's strongest indoor
magnetic field 1200 T was achieved in 2018.

magnetic field. For the research in magnetic field range of
100 - 300 T, we have two single-turn coil (STC) systems
that have a fast-capacitor bank system of 200 kJ for each.
One is the horizontal type (H-type) and the other is a vertical
type (V-type, Fig. 4). Various kinds of laser spectroscopy
experiments such as the cyclotron resonance and the Faraday
rotation are possible using the H-type STC, while a stable
low temperature condition of 2 K is available for the V-type
STC.

Center of Computational
Materials Science
With the advancement of hardware and software technologies, large-scale numerical calculations have been making
important contributions to materials science and will haveeven greater impact on the field in the near future. CCMS
is a specialized research center established in 2011 forpromoting computer-aided materials science with massively
parallel computers, such as the Fugaku supercomputer,which has been recently developed in Kobe as the coreof a billion-dollar national project. Activities of CCMS
are divided into the following three categories: (1) highly
efficient and large-scale use of the Fugaku supercomputerand its application to grand-challenge problems in computational materials science, (2) activities as the center for thecommunity of computational condensed matter physics andmaterials science, and (3) computational physics researchaiming to solve rare-element problems.
For the first category, each group in CCMS is carryingout various individual research projects in its own expertise to efficiently utilize large-scale parallel computers. For
example, the Ozaki group has been developing efficientand accurate methods and software packages to extend theapplicability of DFT to more realistic systems, and investigated the structural and electronic properties of various
2D materials in successful collaboration with experimentalgroups and industrial companies. There are other activities
such as development of Tensor Network (TN) based numerical methods and Markov-chain Monte Carlo methods by the
Kawashima group and the Todo group.
As for the activities in the second category, apart frommajor annual conferences and formal international meetings,
the CCMS provided a series of lectures and training sessions
at Kashiwa. For example, training sessions "Kashiwa Hands-

ISSP Activity Report 202157

•2021/9/3,10,17,24 MP-CoMS on-line lecture series
for fundamentals and applications of first-principles
electronic structure calculations.
• 2021/8/5 Workshop for the Fugaku permanent
magnet project.
• 2021/6/2,3 Matching Workshop for industries &
graduate students/ postdocs, Online.
• 2022/2/3,4 4th Element Strategy Symposium:
Building a Carbon-Neutral Society with Innovative
Materials, on-line.
In addition to the events listed above, we organize regularhands-on program for various application, such as Open MX
and PHYSBO.
Fig. 1. Software in the CCMS community

Laser and Synchrotron Research Center(LASOR Center)Fig. 2. MateriApps Website

On" for getting accustomed to various application programs,
such as OpenMX, Hphi, mVMC, AkaiKKR, and MateriApps LIVE!, as shown in Fig. 1, have been held monthly.
Each session is designed for more than 10 trainees and takes
4-5 hours. We also coordinate the use 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 as shown in Fig. 2.
For the third category, the Akai team and the Fukushimagroup were working on the development of new permanent magnet materials. In order to meet the ever-increasing
demands for new permanent magnet materials that are used
for high performance permanent magnets, CCMS is theoretically investigating the various magnetic properties, such as
saturation magnetization, Curie temperature, and magnetic
anisotropy, of iron-based magnetic materials, including rareearth magnet materials, R2(Fe,Co)14B, R2(Fe,Co)17, andRFe11.5Ti0.5 (R = La, Ce, … , Lu, Y) on the basis of firstprinciples calculations.
These activities are supported by funds for various
governmental projects including Element Strategy Initiative
and the Program for Promoting Researches on the Supercomputer Fugaku.
The following is the selected list of meetings organized
by CCMS in recent years:• 2021/2/22,24 Workshop for data science in materials
science.
• 2021/4/8-2021/7/29 On-line lecture series foradvanced computational science and technology A(2021).
• 2021/5/10,11 AiiDA-tutorial-Japan-2021-Spring.

58

ISSP Activity Report 2021

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 2021, 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). We also have a clean room
for a laser processing platform in Kashiwa II Campus.
The development of novel laser-based light sources in thevacuum-ultraviolet to soft-X-ray regions innovated materials
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 a longest undulator in the world: The
end stations illuminated by the brilliant soft-X-rays are used
to output innovative achievements based on high-resolution
spectroscopy data. In 2018, Japanese government has made astatement to construct a new synchrotron facility in Tohoku.

Fig. 1. Optical frequency comb

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

Fig. 4. Phase-dependence of high harmonic spectra in soft X rays.

LASOR has decided to subjectively contribute to this facility
from the design to the operation.
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.

High-power and ultrashort pulse laser technology has
progressed for this 10 years. It opened two directions ofresearch. 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 have a laser processing platform for both industrial andscientific applications.
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.

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 develop 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.

Fig. 3. Design of E building for extreme VUV- and SX-lasers and newspectroscopy.

• 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

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

ISSP Activity Report 202159

synchrotrons, 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 synchrotrons 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.

Fig. 6. Pump-probed photoemission system using 60-eV laser

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
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.

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• 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 fromIn 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 line-spacing plain grating, which
covers the photon energy range from 250 eV to 2 keV. At thedownstream of the beamline, a lot of experimental stations
have been developed for frontier spectroscopy researches:
three endstations, i.e. ambient pressure X-ray photoemission(Fig. 1), three-dimensional (3D) nano-ESCA (Fig. 2), highresolution soft X-ray emission spectroscopy (XES) (Fig. 3)
stations 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 soft
X-ray imaging (ptychography) station using an originallydeveloped Wolter-type focusing miller system. The beamline

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)

Fig. 1. Ambient pressure photoemission
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ISSP Activity Report 2021

Fig. 2. 3D nano-ESCA station

Fig. 3. Soft X-ray emission station

construction was completed in 2009 and SRL establishedthe Harima branch laboratory in SPring-8. At SPring-8
BL07LSU, each end-station has achieved high performance:
the ambient pressure X-ray photoemission (APXPS) system
has achieved the 100 Torr XPS measurement and is usedfor various catalytic reactions including CO2 reduction; the3Dnano-ESCA station reaches the spatial resolution of 70
nm and is equipped with a sample holder with a 5-terminal
electrode, which is dedicated for the analysis of secondary
battery materials, high electron mobility transistors etc.;
the XES station provides spectra with the energy resolution
around 70 meV at 400 eV and enables real ambient pressure
experiments on various targets including solution and its
interface with solids and gases. In 2021, 34 user groups madetheir experiments during the SPring-8 operation time, which
was the largest number in the past 15 years. Scientific themes
related to new materials and phenomena were also conducted
for social implementation as a trial use of industry-academia
collaboration which will be facilitated in the next-generationsynchrotron radiation facility which is now under construction and will be operational since 2024 at Sendai.

is the highest in the world at present. From FY 2015, the
new SARPES system has been opened to outside users. The
Laser-SARPES system consists of an analysis chamber, acarousel chamber connected to a load-lock chamber, anda molecular beam epitaxy chamber, which are kept ultrahigh vacuum (UHV) environment and are connected to
UHV gate valves. The electrons are excited with 6.994 eV
photons, yielded by 6th harmonic of a Nd:YVO4 quasicontinuous wave laser with a 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 amplifier laser,which was developed by Kobayashi's lab in LASOR. The
hemispherical electron analyzer is a custom-made Scienta
Omicron DA30-L, modified for installing the spin detectors.
The spectrometer is equipped with two high-efficient spin
detectors orthogonally placed each other, associating very
low energy electron diffraction, which allows us to analyze
the three-dimensional spin polarization of electrons. At theexit of the hemispherical analyzer, a multi-channel plate
and a CCD camera are also installed, which enables us toperform the angle-resolved photoelectron spectroscopy with
two-dimensional (energy-momentum) detection. The laserSARPES with 7 eV laser can provide both high-resolution
spin-integrated and spin-resolved photo-emission spectra invarious types of solids, such as spin-orbit coupled materials
and ferromagnetic materials. In addition, using the 10.7 eV
makes it possible to follow their ultrafast spin dynamics inthe time domain by pump-probe scheme.
The time-resolved soft X-ray spectroscopy (TR-SX)
station was moved from SPring-8 BL07LSU to theE-building in 2020. The measurement chamber is equippedwith a unique electron spectrometer, the two-dimensional(2D) angle-resolved time-of-flight (ARTOF) analyzer. The
system is currently operational for measurements of 2D
angle-resolved photoemission spectroscopy with pulsed laserof 6 eV photon energy, produced by high harmonic generations from a 1.2 eV laser. Time-resolved measurements canalso be conducted with temporal resolution of 600 fs.

• High-resolution Laser SARPES at E-building
High-resolution Laser Spin- and Angle-Resolved Photoemission Spectroscopy (SARPES) is a powerful technique
to investigate the spin-dependent electronic states in solids.
In FY 2014, LASOR and SRL staffs constructed a new
SARPES apparatus (Fig. 4), which was designed to provide
high-energy and -angular resolutions and high efficiencyof spin detection using a laser light at E-building. The
achieved energy resolution of 1.7 meV in SARPES spectra

Fig. 4. Laser-SARPES system at E-building

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61

Conferences and Workshops
Frontier Research on Glasses and Related Complex Systems

May 10-12, 2021
O. Yamamuro, H. Tanaka, K. Miyazaki, T. Kanaya, T. Hayakawa, K. Fukao,
R. Nozaki, N. Shinyashiki, O. Urakawa, H. Shirota, and N. YamamuroThis workshop was organized for discussing the present frontiers and future directions of the experimental, theoretical and computational studies on glasses and related systems including granular materials, spin/electronic glasses, proteins, foods, medicines, etc. ISSP has
held workshops related to the glass every 3-4 years since 2002 and played a leading role of this field. Though a face-to-face meeting wasplanned at the time of application, it was unfortunately changed to an online meeting due to prolonged COVID-19 effects. The workshop
contained 2 plenary lectures, 20 invited talks, and 21 contributed talks. The poster session, which was held in previous workshops, wascancelled. There were 208 participants including some special guests from China. This number was the largest ever, which is the biggest
advantage of the online meeting. The discussion was quite active and many questions were asked from the audience though the online
meetings are usually quiet. This reflects the activity of the present field. Actually, a related international meeting, International Discussion
Meeting on Relaxations in Complex Systems (https://9idmrcs.jp/), will be held in Makuhari, Chiba in 2023, based on the domestic membersof this workshop.

2nd Workshop on the Frontline and Future Trends in Nanoscale Science

June 22, 2021
S. Katsumoto, Y. Otani, T. Osada, Y. Yamashita, S. Miwa, and Y. Hasegawa

Recent rapid progress in nanoscale science, such as elucidation and precise control of novel quantum phenomena by nanofabricated devices, and emerging topological properties at surfaces, interfaces, and atomic-layer two-dimensional materials,
attracts tremendous attentions in the community of condensed matter physics. In order to overview relevant cutting edge
researches and explore future directions of the interdisciplinary research field, we organized this workshop following thefirst one held in July 2020. Looking ahead of the foundation of Laboratory of Nanoscale Quantum Materials (Q-Nano Lab,later founded in March 2022), the present workshop focused on the subjects of low-dimensional and topological materials,
spintronics, quantum transport, q-bits, quantum computing etc., and invited 8 young researchers working in universities andresearch institutes in Japan.
Since the workshop was held online through the network, more than 200 participants, some of which are from abroad,joined the workshop, and actively participated in the discussion after the presentations. Although a half-day short event, theworkshop was so exciting because all the presentations provides us new amazing and stimulating results on the frontline
nano science. The organizing members are also delighted to find many young promising researchers performing high-quality
sciences based on their new ideas and concepts. We expect that the workshop will further encourage the activity of nanoscience in Japan and promote joint researches with our institute through the newly founded Q-Nano Lab.

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New Trends in Quantum Condensed Matter Theory 2021

July 26-30, 2021
T. Oka, M. Oshikawa, G. Chen, R. Moessner, and A. Vishwanath

Quantum material is a stage where various exotic quantum phenomena such as phase transitions and non-trivial dynamics
are manifested, and active research is being done worldwide. We held an online workshop with a focus on recent developmentsin the theory of quantum materials, where both Japanese and international young active theorists were invited.
Talks on twisted bilayer graphene, quantum computation, nonequilibrium many-body quantum states, photoinduced superconductivity, quantum chaos, topological states, etc. were given by 11 Japanese, 5 from Asia, 3 from Europe, and 6 from theUS, including 3 women.
The invited speakers were young researchers only, and the presentations were full of energy and enthusiasm. Despite thelate-night (Japan time), there were always more than 70 participants, and a lively Q&A session was held. One aim of theworkshop was to support young researchers in building their career paths by providing a stage for them to stimulate each otheractively and by shining a spotlight on their achievements. We think that this workshop was successful in this aim and feel that itshould be continued, for example, bi-annually.

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ISSP WOMEN’S WEEK 2021

August 3-5, 2021
H. Akiyama, T. Ozaki, M. Oshikawa, M. Tokunaga, I. Matsuda,
S. Miwa, H. Mori, M. Yamashita, and J. Yoshinobu

For the development of material science studying the various physical properties of matters, it is essential to further
expand the research area and promote the diversity of the researchers. The ISSP Workshop entitled "ISSP WOMEN'S WEEK
2021" was held to further promote the activities of female researchers who still remain a minority in the field of science andengineering research. We invited female researchers who are active on the cutting edge in a wide range of fields of materialscience, ranging from leading professors representing each research field, who serve as a role model for female students, toup-and-coming young female researchers. In contrast to an ordinary workshop with a focused topic, this workshop covers awide range of topics – including biophysics, chemistry, surface physical sciences, and strong-correlated electrons – for creating
new networks of female researchers. All speakers are thus asked to briefly introduce themselves in addition to the introduction
for broad audiences. All speakers are also asked to give comments with respect to current issues to promote diversity. On thesecond day, Dr. Kaori Hayashi (Vice President of the University of Tokyo) and Dr. Kaoru Tamada (Vice President of Kyushu
University) gave special lectures on the efforts of their institutions to promote diversity, which is followed by a panel discussion with invited speakers. There were about 166 pre-registered participants for this workshop, with 60-90 participants / dayover the three days.

10th International Workshop on Advanced Spectroscopy of Organic Materials forElectronic Applications: ASOMEA-X

October 25-28, 2021
J. Yoshinobu, R. Arafune, K. Akaike, K. Ozawa, Y. Yamada, H. Yoshida,
Y. Nakayama, Y. Harada, T. Kondo, K. Okazaki, K. Kuroda

ASOMEA has been held every two to three years since 2001 as an international workshop to discuss structures, electronic states, andproperties of electronically functionalized organic materials and the related phenomena at surface/interface from the viewpoint of spectroscopy. This ASOMEA-X has expanded its scope to include not only electronically functionalized organic materials, but also low-dimensional
and topological materials that have recently been attracting much attention. In order to obtain deeper understanding of the microscopic anddynamic properties of these materials as well as the behavior of electrons, atoms and molecules during device operation and reactions, wehave focused not only on studies using conventional spectroscopies but also those by the state-of-the-art spectroscopies including operando
spectroscopy, time-resolved spectroscopy and local probe microscopy/spectroscopy. The presentations at ASOMEA-X consisted of 3 invitedtutorial talks, 20 invited talks, 22 general oral presentations and 18 poster presentations. For oral presentations, the web conference tool
(Zoom) was used together with the breakout rooms for the intimate discussion with speakers after their presentations. For poster presentations, a virtual poster room was prepared using SpatialChat, allowing participants to approach the presenter for discussion, similar to aface-to-face poster presentation. The number of participants is as follows: 103 from Japan and 60 from eight foreign countries (Sweden,
Germany, U.S.A., China, Korea, Singapore, India, and New Zealand). The program and abstracts are available from the web site (https://yoshinobu.issp.u-tokyo.ac.jp/ASOMEAX_web/index.html).

A screen shot of one of the online tutorial lectures, in which Prof. Shin gave his last invited talk among many
international conferences. Prof. Shin passed away on June 7, 2022.

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ISSP Activity Report 2021

Frontiers in Molecular Crystals Research: New Materials and Novel Phenomena
December 1-2, 2021
H. Ito, T. Kusamoto, M. Naka, T. Osada, H. Seo (chair), M. Suda, N. Tajima, A. Ueda, M. Yamashita, and K. Yoshimi
This workshop was organized to gather researchers working on a rich variety of molecular solids to exchange discussions
about recent progresses in different fields. The presentations included a broad range of topics: e.g., development of new metal
complexes showing novel cross-correlated functionalities among magnetic, optical, and electric responses, elucidation of novel
phenomena by first-principles calculations and strongly-correlated theories, design of pi-electron system in newly synthesizedmolecular materials, photo-induced nonlinear phenomena explored by state-of-the-art optical sources, and measurements andanalyses of nontrivial electronic states in molecular topological materials. We had 12 invited talks, 18 contributed talks, and 41
poster presentations. The workshop was held as a hybrid-type organization with oral talks onsite at ISSP and online otherwise,
and successfully had extensive discussions between researchers with different backgrounds.

High-Pressure Workshop “Recent topics”
March 5, 2022
Y. Uwatoko, Z. Hiroi, H. Takahashi, and M. Hasegawa
Pressure is an important thermodynamic parameter frequently used for understanding and tuning the fundamental physicalproperties of materials in a controlled manner and also synthesize new materials not existing in ambient pressure and temperature. Apart from these, in recent years, the growing importance of high pressure has been realized in many other research fields.
To review and update the status of recent research in various fields using high pressure as a keyword as well as to discuss the
future research prospects, the ISSP workshop was held on March 5th, 2022. Considering the ongoing COVID-19 situation,
the workshop was held online via ZOOM with 183 participants from universities, companies and including research institutes working in various fields. In this workshop, 14 researchers were invited to deliver talk about the latest trends in scienceand discuss the new direction that is expected to emerge from their current research activity. Each speaker presented various
research results ranging from synthesis of new materials, measurement techniques under high pressure, essential pressuretechnologies to various applied measurements. In addition, each presentation was followed by an active question and answer
session. Finally, Prof. Mori, Director of ISSP, gave a presentation on the prospects and direction of ISSP.

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Frontier of Scanning Probe Microscopy and Related Nano Science

March 30-31, 2022,
M. Haze, T. An, Y. Okada, Y. Kim, Y. Sugimoto, Y. Hasegawa, T. Hanaguri, and Y. Yoshida

Scanning tunneling microscopy (STM) provides us atomically resolved images of materials’ surfaces. It has been known
that electronic states, magnetic properties, and vibrational spectra can be obtained by tunneling spectroscopy, spin-polarized
STM, and inelastic tunneling spectroscopy, respectively. Recently, combined with pico-second pulsed light or THz light, newatomistic information of time-resolved phenomena were revealed. Recent progress of photo STM has made meV-resolutionof single-molecule photo luminescence possible. Spin-polarized STM with GHz waves successfully detects spin resonance of
single atoms. Dilution refrigerator STM achieves meV energy resolution to reveal fine structures in a superconducting gap.
Improvement of atomic force microscopy (AFM) is also amazing; atomic framework of molecules is now imaged by using
CO-terminated tip. The orientation of water molecules are successfully visualized.
In order to overview above-mentioned recent advancements of probe microscopy, we organized this workshop. In addition
to young domestic invited speakers and poster presenters, we also invited several prominent researchers from abroad, making
the most of the online workshop.
Since the schedule was arranged loosely and each speaker has a plenty of time for the presentation (40 min), speakers gave
us a very clear and informative talk, which may not be possible in usual tight-scheduled conferences. The discussion after thepresentation was also quite active, which obviously helped scientific and technical understandings of the audience. More than
150 researchers joined the workshop including some from abroad. It would be our pleasure if the workshop revise the perspective about the probe microscopes and promote joint researches among the participants.

Open Topological System in Biology, Quantum Systems, and Statistical Mechanics
March 28-30, 2022
T. Oka and K. Inoue
Transport processes of particles, energy, and information have been widely studied in both condensed matter physics andlife sciences. In this workshop, we invited researchers from 3 fields, namely condensed matter physics, life sciences, and statistical mechanics, to discuss the topics of open topological systems.
Talks on non-Hermite quantum systems, correlated electrons, Liouville systems, Floquet systems, and biological systems(experiments) were given. Naomichi Hatano, who pioneered the field, gave the first talk with an excellent overview. Manyof the speakers were young, including two Ph.D. students. The format of the workshop was hybrid, with about 50 on-site
audiences and 20 online audiences. Extremely lively Q&A sessions were held, and although we had a relaxed schedule (60mins for each speaker), the discussions continued for a long time. The workshop aimed to bring young researchers fromdifferent fields and help them communicate their ideas. We think that this workshop was successful in this aim and feel that itshould be continued, for example, bi-annually.

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ISSP Activity Report 2021

67

Publications (2021.1 - 2022.4)
Division of Condensed Matter Science
Mori group
We have successfully developed and unveiled unprecedented functional properties for the molecular materials and systems.
The major achievements in 2021 are (1) to develop the simplest model for doped PEDOT (Poly(3,4-ethylenedioxythiophene)),single-crystalline EDOT dimer radical cation salts, (2) to investigate effects of mechanical grinding on the phase behavior andanhydrous proton conductivity of imidazolium hydrogen succinate, and (3) to investigate modulation of the electronic states andmagnetic properties of Nickel catecholdithiolene complex by oxidation-coupled deprotonation.
1.

†Effects of mechanical grinding on the phase behavior and anhydrous proton conductivity of imidazolium hydrogen2.

†Proton Conduction Mechanism for Anhydrous Imidazolium Hydrogen Succinate Based on Local Structures andsuccinate: S. Dekura, Y. Sunairi, K. Okamoto, F. Takeiri, G. Kobayashi, Y. Hori, Y. Shigeta and H. Mori, Solid State
Ionics 372, 115775 (2021).

Molecular Dynamics: Y. Hori, S. Dekura, Y. Sunairi, T. Ida, M. Mizuno, H. Mori and Y. Shigeta, J. Phys. Chem. Lett.
12, 5390 (2021).
水素を活かすセラミクス プロトンー電子カップル型分子性結晶および二分子膜における機能開拓 : 森 初果 , 加
藤 浩之 , 藤野 智子 , 上田 顕 , 吉信 淳 , セラミックス 56, 88-91 (2021).

3.

*

4.

Effect of Alkyl Chain Length on Charge Transport Property of Anthracene-Based Organic Semiconductors: D. Zhang,
S. Yokomori, R. Kameyama, C. Zhao, A. Ueda, L. Zhang, R. Kumai, Y. Murakami, H. Meng and H. Mori, ACS Appl.
Mater. Interfaces 13, 989 (2021).

5.

Terahertz-field-induced polar charge order in electronic-type dielectrics: H. Yamakawa, T. Miyamoto, T. Morimoto,
N. Takamura, S. Liang, H. Yoshimochi, T. Terashige, N. Kida, M. Suda, H. M. Yamamoto, H. Mori, K. Miyagawa, K.
Kanoda and H. Okamoto, Nat Commun 12, 953 (2021).

6.

*Ferromagnetism out of charge fluctuation of strongly correlated electrons in κ-(BEDT-TTF) Hg(SCN) Br: M.
2
2

Yamashita, S. Sugiura, A. Ueda, S. Dekura, T. Terashima, S. Uji, Y. Sunairi, H. Mori, E. I. Zhilyaeva, S. A. Torunova, R.
N. Lyubovskaya, N. Drichko and C. Hotta, npj Quantum Mater. 6, 87 (2021).

7.

*The Simplest Model for Doped Poly(3,4-ethylenedioxythiophene) (PEDOT): Single-crystalline EDOT Dimer Radical

8.

Modulation of the electronic states and magnetic properties of nickel catecholdithiolene complex by oxidation-coupled
deprotonation: S. Yokomori, S. Dekura, A. Ueda, R. Kumai, Y. Murakami and H. Mori, J. Mater. Chem. C 9, 1071810726 (2021).

9.

†Magnetic and Structural Properties of Organic Radicals Based on Thienyl- and Furyl-Substituted Nitronyl Nitroxide: T.

Cation Salts: R. Kameyama, T. Fujino, S. Dekura, M. Kawamura, T. Ozaki and H. Mori, Chem. Eur. J. 27, 6696 (2021).

Sugano, S. J. Blundell, W. Hayes and H. Mori, Magnetochemistry 7, 62 (2021).

10. Conjugation length effect on the conducting behavior of single-crystalline oligo(3,4-ethylenedioxythiophene) (n EDOT)
radical cation salts: R. Kameyama, T. Fujino, S. Dekura and H. Mori, Phys. Chem. Chem. Phys. 24, 9130 (2022).
11. Proton–electron-coupled functionalities of conductivity, magnetism, and optical properties in molecular crystals: H.
Mori, S. Yokomori, S. Dekura and A. Ueda, Chem. Commun., 10.1039.D1CC06826A (2022), in print.
12. 水素を使いこなすためのサイエンス ハイドロジェノミクス : 森 初果 , ( 共立出版 , ISBN 978-4-320-04498-2, 2022).

Osada group
Two topological thermoelectric effects were investigated in the organic Dirac fermion system: (1) The nonlinear anomalous
Ettingshausen effect (AEE) was predicted as a thermoelectric analogue of the nonlinear anomalous Hall effect (AHE) in the* Joint research among groups within ISSP.

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ISSP Activity Report 2021

current-carrying state in two-dimensional (2D) massive Dirac fermion system. The thermoelectric Berry curvature dipole wasintroduced instead of the Berry curvature dipole. We estimated the possible nonlinear AEE in the weak charge ordering (CO)state in an organic conductor α-(BEDT-TTF)2I3, and found that it is in the observable range. (2) The quantized thermoelectricHall effect (QTHE), which was theoretically proposed in the 2D massless Dirac fermion system at the high-magnetic-field
quantum limit, was investigated in the real organic Dirac system α-(BEDT-TTF)2I3. The relatively large Zeeman splitting of
the n=0 Landau level suppresses the QTHE causing the hump-like structure of Seebeck coefficient, which was observed in theexperiment.
1.

Experimental Confirmation of Massive Dirac Fermions in Weak Charge-Ordering State in α-(BEDT-TTF)2I3: K.
Yoshimura, M. Sato and T. Osada, J. Phys. Soc. Jpn. 90, 033701(1-5) (2021).

2.

Possible Nonlinear Anomalous Thermoelectric Effect in Organic Massive Dirac Fermion System: T. Osada and A.
Kiswandhi, J. Phys. Soc. Jpn. 90, 053704(1-5) (2021).

3.

Thermoelectric Effect at Quantum Limit in Two-Dimensional Organic Dirac Fermion System with Zeeman Splitting: T.
Osada, J. Phys. Soc. Jpn. 90, 113703(1-4) (2021).

4.

Observation of possible nonlinear anomalous Hall effect in organic two-dimensional Dirac fermion system: A.
Kiswandhi and T. Osada, J. Phys.: Condens. Matter 34, 105602(1-7) (2022).

5.

Thermoelectric Hall Effect at High-Magnetic-Field Quantum Limit in Graphite as a Nodal-Line Semimetal: T. Osada, T.
Ochi and T. Taen, J. Phys. Soc. Jpn. 91, 063701(1-4) (2022).

6.

有機ディラック電子系におけるトポロジカル輸送現象 : 長田 俊人 , 固体物理 57, 227-240 (2022).

7.

有機ディラック電子系における非線形トポロジカル輸送現象 : 長田 俊人 , キスワンディ アンディカ , 日本物理学会誌 77,233-238 (2022).

Yamashita group
We have been studying (1) quantum criticality in heavy-fermion materials by ultralow 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) developments of ultralow-temperature resistivity measurements of YbRh2Si2,(2) thermal-Hall measurements of AFM skyrmions in MnSc2S4, (3) planar thermal Hall measurements of Kitaev candidate
Na2Co2TeO6, and (4) electric transports and NMR of EuIn2As2.
1.

*Pressure-induced phase transition in the J -J square lattice antiferromagnet RbMoOPO Cl: H. Takeda, T. Yamauchi,
1 2
4
M. Takigawa, H. Ishikawa and Z. Hiroi, Phys. Rev. B 103, 104406 (2021).

2.

Tuning the Parity Mixing of Singlet-Septet Pairing in a Half-Heusler Superconductor: K. Ishihara, T. Takenaka, Y. Miao,
Y. Mizukami, K. Hashimoto, M. Yamashita, M. Konczykowski, R. Masuki, M. Hirayama, T. Nomoto, R. Arita, O.
Pavlosiuk, P. Wisniewski, D. Kaczorowski and T. Shibauchi, Phys. Rev. X 11, 041048 (2021).

3.

*Strongly correlated superconductivity in a copper-based metal-organic framework with a perfect kagome lattice:4.

*Ferromagnetism out of charge fluctuation of strongly correlated electrons in κ-(BEDT-TTF) Hg(SCN) Br: M.
2
2

5.

* ヘリウムリサイクルへの取り組み―東京大学物性研究所の活動―: 勝本 信吾 , 鷺山 玲子 , 土屋 光 , 山下 穣 , 低温工学

6.

T. Takenaka, K. Ishihara, M. Roppongi, Y. Miao, Y. Mizukami, T. Makita, J. Tsurumi, S. Watanabe, J. Takeya, M.
Yamashita, K. Torizuka, Y. Uwatoko, T. Sasaki, X. Huang, W. Xu, D. Zhu, N. Su, J. -G. Cheng, T. Shibauchi and K.
Hashimoto, Sci. Adv. 7, eabf3996(1-8) (2021).
Yamashita, S. Sugiura, A. Ueda, S. Dekura, T. Terashima, S. Uji, Y. Sunairi, H. Mori, E. I. Zhilyaeva, S. A. Torunova, R.
N. Lyubovskaya, N. Drichko and C. Hotta, npj Quantum Mater. 6, 87 (2021).

56, 119 (2021).

Field-induced topological Hall effect in antiferromagnetic axion insulator candidate EuIn2As2: J. Yan, Z. Z. Jiang, R. C.
Xiao, W. J. Lu, W. H. Song, X. B. Zhu, X. Luo, Y. P. Sun and M. Yamashita, Phys. Rev. Research 4, 013163 (2022).

Division of Condensed Matter Theory
Tsunetsugu group† Joint research with outside partners.

ISSP Activity Report 2021

69

We have continued to study several topics of correlated electron systems and their nonequilibrium dynamics this year. One
topic is the thermodynamics of a frustrated spin system, and we have studied the Kagome spin system with breathing lattice
deformation. Mapping this system to an effective model of spin and chirality degrees of freedom, we have performed classicalMonte Carlo simulations to investigate their thermodynamic properties. We have found a glassy behavior of chiralities, which
may be understood as a nematic liquid. We have also continued a study of electric quadrupoles in the heavy fermion system. An
analysis on the complex spatial structure of quadrupoles has been developed further to examine the effects of the cubic interactions characteristic to this system. As for the nonequilibrium issues, we have analyzed nonlinear optical responses of a Kitaev
spin liquid and proposed their use for identifying such a liquid. We have also developed a WKB theory to study nonperturbative nonlinear optical effects. For statistical-mechanical aspects of periodically driven quantum systems, we have characterized
the heating rate in isolated systems based on the Fermi golden rule. We have also developed a theory for determining nonequilibrium steady states in the systems subject to Markovian dissipation. In particular, a setup was proposed for realizing a time
crystalline steady state accompanied by critical phenomena.
1.

Dynamics of Composite Domain Walls in Multiferroics in Magnetic Field and Their Instability: K. Kawahara and H.
Tsunetsugu, J. Phys. Soc. Jpn. 90, 014703 (2021).

2.

Nematicity Liquid in a Trimerized-Kagome Antiferromagnet: I. Tanaka and H. Tsunetsugu, J. Phys. Soc. Jpn. 90,
063707 (2021).

3.

Quadrupole Orders on the fcc Lattice: H. Tsunetsugu, T. Ishitobi and K. Hattori, J. Phys. Soc. Jpn. 90, 043701 (2021).

4.

Analytical WKB theory for high-harmonic generation and its application to massive Dirac electrons: H. Taya, M. Hongo
and T. N. Ikeda, Phys. Rev. B 104, L140305 (2021).

5.

Fermi's golden rule for heating in strongly driven Floquet systems: T. N. Ikeda and A. Polkovnikov, Phys. Rev. B 104,
134308 (2021).

6.

Generalized hydrodynamics study of the one-dimensional Hubbard model: Stationary clogging and proportionality ofspin, charge, and energy currents: Y. Nozawa and H. Tsunetsugu, Phys. Rev. B 103, 035130 (2021).

7.

Linear and nonlinear optical responses in Kitaev spin liquids: M. Kanega, T. N. Ikeda and M. Sato, Phys. Rev. Research
3, L032024 (2021).

8.

Nonequilibrium steady states in the Floquet-Lindblad systems: van Vleck's high-frequency expansion approach: T. N.
Ikeda, K. Chinzei and M. Sato, SciPost Phys. Core 4, 033 (2021).

9.

Criticality and rigidity of dissipative discrete time crystals in solids: K. Chinzei and T. N. Ikeda, Phys. Rev. Research 4,023025 (2022).

10. 複数の秩序が生むドメイン壁の不安定性 -- 複合ドメイン壁の構造不安定性 --: 川原 光滋 , 常次 宏一 , 固体物理 56,
467-475 (2021).
11. ユニークな四極子秩序の安定化機構の発見 : 服部 一匡 , 石飛 尊之 , 常次 宏一 , 固体物理 57, 255-266 (2022).

Kato group
The main research subject of Kato Lab. is transport properties in mesoscopic and spintronic devices. We studied (1) heat transport via small quantum systems, (2) transmission properties of Josephson junction arrays, (3) spin pumping from ferromagnetic
insulator to metallic systems, (4) many-body effect in multielectron quantum dot systems, (5) high-harmonic generation insemiconductors, (6) nonequilibrium transport through Kondo quantum dots, (7) nanorotors driven by the spin-rotation coupling,and (8) the fluctuation theorem in spin-Hall magnetoresistance.
1.

Heat transport through a two-level system embedded between two harmonic resonators: T. Yamamoto and T. Kato, J.
Phys.: Condens. Matter 33, 395303(1-10) (2021).

2.

*High-harmonic generation in GaAs beyond the perturbative regime: P. Xia, T. Tamaya, C. Kim, F. Lu, T. Kanai, N.

3.

Nonlinear Fermi liquid transport through a quantum dot in asymmetric tunnel junctions: K. Tsutsumi, Y. Teratani, R.
Sakano and A. Oguri, Phys. Rev. B 104, 235147(1-17) (2021).

4.

Piezo-optic effect of high-harmonic generation in semiconductors: T. Tamaya and T. Kato, Phys. Rev. B 103, 205202(110) (2021).

5.

Spin current at a magnetic junction as a probe of the Kondo state: T. Yamamoto, T. Kato and M. Matsuo, Phys. Rev. B
104, L121401(1-5) (2021).

Ishii, J. Itatani, H. Akiyama and T. Kato, Phys. Rev. B 104, L121202(1-6) (2021).

* Joint research among groups within ISSP.

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6.

Spin pumping of two-dimensional electron gas with Rashba and Dresselhaus spin-orbit interactions: M. Yama, M.
Tatsuno, T. Kato and M. Matsuo, Phys. Rev. B 104, 054410(1-9) (2021).

7.

Transmission of waves through a pinned elastic medium: T. Yamamoto, L. I. Glazman and M. Houzet, Phys. Rev. B
103, 224211(1-17) (2021).

8.

*Preparation and Readout of Multielectron High-Spin States in a Gate-Defined GaAs/AlGaAs Quantum Dot: H.

9.

Three-body correlations in nonlinear response of correlated quantum liquid: T. Hata, Y. Teratani, T. Arakawa, S. Lee, M.
Ferrier, R. Deblock, R. Sakano, A. Oguri and K. Kobayashi, Nat. Commun. 12, 3233(1-7) (2021).

Kiyama, K. Yoshimi, T. Kato, T. Nakajima, A. Oiwa and S. Tarucha, Phys. Rev. Lett. 127, 086802(1-6) (2021).

10. †*DSQSS: Discrete Space Quantum Systems Solver: Y. Motoyama, K. Yoshimi, A. Masaki-Kato, T. Kato and N.
Kawashima, Comput. Phys. Commun. 264, 107944(1-9) (2021).
11. Kondo Effect and Phase Measurement in Double Quantum Dot in Parallel: Y. Zhang, R. Sakano and M. Eto, J. Phys.
Soc. Jpn. 91, 014703(1-10) (2022).
12. Current noise and Keldysh vertex function of an Anderson impurity in the Fermi-liquid regime: A. Oguri, Y. Teratani, K.
Tsutsumi and R. Sakano, Phys. Rev. B 105, 115409(1-37) (2022).
13. Einstein–de Haas Nanorotor: W. Izumida, R. Okuyama, K. Sato, T. Kato and M. Matsuo, Phys. Rev. Lett. 128,
017701(1-6) (2022).
14. Fluctuation theorem for spin transport at insulating ferromagnetic junctions: T. Sato, M. Tatsuno, M. Matsuo and T.
Kato, Journal of Magnetism and Magnetic Materials 546, 168814(1-6) (2022).
15. 一歩進んだ理解を目指す物性物理学講義 : 加藤 岳生 , ( サイエンス社 , 東京 , 2022).

Division of Nanoscale Science
Katsumoto group
A shot noise measurement system using a handmade HEMT and a preamplifier has been completed. Numerical simulation on
the spin precession and division of electrons propagating on spin-resolved quantum Hall edge was carried out with the recursive
Green function method. The simulation successfully reproduced the experimentally observed probability partition. Shot noise
measurement was carried out on the flying spin qubit interferometer. We have found an anomalous decrease in the shot noise at
higher bias, which has been explained by the approach of spin-resolved edge states.
1.

Commensurability oscillations in the Hall resistance of unidirectional lateral superlattices: A. Endo, S. Katsumoto andY. Iye, Phys. Rev. B 103, 235303 (2021).

2.

Homemade-HEMT-based transimpedance amplifier for high-resolution shot-noise measurements: T. Shimizu, M.
Hashisaka, H. Bohuslavskyi, T. Akiho, N. Kumada, S. Katsumoto and K. Muraki, Review of Scientific Instruments 92,
124712 (2021).

3.

* ヘリウムリサイクルへの取り組み―東京大学物性研究所の活動―: 勝本 信吾 , 鷺山 玲子 , 土屋 光 , 山下 穣 , 低温工学

56, 119 (2021).

Otani group
This year, we focused on the topic related to the antiferromagnetic spintronics, namely the manipulation of the cluster magnetic
octupole state in Mn3X (X=Mn or Sn) thin films. Last year, we succeeded in the magnetic octupole state manipulation in Mn3Sn
by using spin-orbit torque. We further improved the readout voltage beyond 1 mV, a milestone for future applications formemory technology. Besides, we also demonstrated that the absence of shape anisotropy enables omnidirectional control andlifts the shape constraint in designing magnetic devices. Our international collaboration with Pohang University of Science andTechnology in Korea and Peter Grünberg Institut in Germany on the novel spin-charge conversion study showed that the flow oforbital angular momentum plays a vital role in exerting nontrivial torque in ferromagnetic metal/Cu/Aluminum oxide trilayers.
Another international collaboration on magnon-phonon coupling study with Huazhong University of Science and Technology
demonstrated numerically that antiferromagnetic domain walls could oscillate at a relatively low frequency of the order of MHz.
This finding is beneficial for antiferromagnetic devices, which require a stable antiferromagnetic domain wall velocity.

† Joint research with outside partners.

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1.

Nontrivial torque generation by orbital angular momentum injection in ferromagnetic-metal/Cu/Al2O3 trilayers: J. Kim,
D. Go, H. Tsai, D. Jo, K. Kondou, H.-W. Lee and Y. Otani, Phys. Rev. B 103, L020407 (2021).

2.

*Domain structure and domain wall dynamics in topological chiral antiferromagnets from the viewpoint of magnetic

3.

Influence of planar Hall effect on the output signal in a T-shaped spin conversion device: H. Mizuno, H. Isshiki, K.
Kondou, Y. Zhu and Y. Otani, Appl. Phys. Lett. 119, 092401 (2021).

4.

*Omnidirectional Control of Large Electrical Output in a Topological Antiferromagnet: T. Higo, Y. Li, K. Kondou, D.

5.

*Spin-orbit torque switching of the antiferromagnetic state in polycrystalline Mn Sn/Cu/heavy metal heterostructures:
3

6.

Strain-induced Megahertz Oscillation and Stable Velocity of an Antiferromagnetic Domain Wall: F. Chen, X. Ge, W.
Luo, R. Xing, S. Liang, X. Yang, L. You, R. Xiong, Y. Otani and Y. Zhang, Phys. Rev. Applied 15, 014030 (2021).

7.

*Fabrication of polycrystalline Weyl antiferromagnetic Mn Sn thin films on various seed layers: T. Nakano, T. Higo, A.
3

8.

Nanochannels for spin-wave manipulation in Ni80Fe20 nanodot arrays: S. Sahoo, S. N. Panda, S. Barman, Y. Otani and
A. Barman, Journal of Magnetism and Magnetic Materials 522, 167550 (2021).

9.

*Giant Effective Damping of Octupole Oscillation in an Antiferromagnetic Weyl Semimetal: S. Miwa, S. Iihama, T.

octupole: Y. Otani and T. Higo, Appl. Phys. Lett. 118, 040501 (2021).

Qu, M. Ikhlas, R. Uesugi, D. Nishio-Hamane, C. L. Chien, Y. Otani and S. Nakatsuji, Adv. Funct. Mater. 31, 2008971(2021).
H. Tsai, T. Higo, K. Kondou, A. Kobayashi, T. Nakano, K. Yakushiji, S. Miwa, Y. Otani and S. Nakatsuji, AIP Advances
11, 045110 (1-6) (2021).

Kobayashi, S. Miwa, S. Nakatsuji and K. Yakushiji, Phys. Rev. Materials 5, 054402 (1-9) (2021).

Nomoto, T. Tomita, T. Higo, M. Ikhlas, S. Sakamoto, Y. Otani, S. Mizukami, R. Arita and S. Nakatsuji, Small Science 1,
2000062 (1-8) (2021).

10. *Large Hall Signal due to Electrical Switching of an Antiferromagnetic Weyl Semimetal State: H. Tsai, T. Higo, K.
Kondou, S. Sakamoto, A. Kobayashi, T. Matsuo, S. Miwa, Y. Otani and S. Nakatsuji, Small Science 1, 2000025 (1-9)(2021).
11. Interaction between surface acoustic waves and spin waves in a ferromagnetic thin film: K. Yamamoto, M. Xu, J.
Puebla, Y. Otani and S. Maekawa, Journal of Magnetism and Magnetic Materials 545, 168672 (2022).
12. Efficient and controllable magnetization switching induced by intermixing-enhanced bulk spin–orbit torque in ferromagnetic multilayers: K. Zhang, L. Chen, Y. Zhang, B. Hong, Y. He, K. Lin, Z. Zhang, Z. Zheng, X. Feng, Y. Zhang, Y.
Otani and W. Zhao, Applied Physics Reviews 9, 011407 (2022).

Hasegawa group
We studied superconductivity of Pb atomic layers formed on vicinal substrates to investigate how surface steps with an interval
shorter than the coherence length affect the two-dimensional superconductivity. Transport measurements revealed reduced
critical temperature and enhanced critical magnetic field. Scanning tunneling microscopy (STM) exhibited elongated vortices
along the steps. The oval-shaped vortices are Abrikosov-Josephson vortices squeezed in the direction perpendicular to the steps
due to the reduced coherence length, which is also responsible for the enhanced critical fields. Our work demonstrates thatvicinal substrates provide a unique platform to control macroscopic properties through the precise tuning of disorder. In collaboration with Prof. Bent Weber, Nanyang Univ., Singapore, we investigated heterostructures of a quantum spin Hall candidate
1T'-WTe2 grown by van der Waals epitaxy on superconductor NbSe2 by STM. By analyzing the normal and superconducting
density of states (DOS) by scanning probe spectroscopy across the interface, we found that strong hybridization of electronic
states gives rise to a semimetallic DOS in the 2D bulk even in nominally band insulating crystals. Despite the strong hybridization, we found a measurable enhancement of the local DOS at the crystal edges in the normal state and a slight enhancement of
the order parameter in the superconducting state.
1.

Enhanced critical magnetic field for monoatomic-layer superconductor by Josephson junction steps: F. Oguro, Y. Sato,
K. Asakawa, M. Haze and Y. Hasegawa, Phys. Rev. B 103, 085416(1-7) (2021).

2.

†Reduction in magnetic coercivity of Co nanomagnets by Fe alloying: H.-H. Yang, C.-C. Hsu, K. Asakawa, W.-C. Lin

3.

†Multiband superconductivity in strongly hybridized 1T'−WTe /NbSe heterostructures: W. Tao, Z. J. Tong, A. Das,
2
2

and Y. Hasegawa, Nanoscale 13, 16719-16725 (2021).

D.-Q. Ho, Y. Sato, M. Haze, J. Jia, Y. Que, F. Bussolotti, K. E. Johnson Goh, B. Wang, H. Lin, A. Bansil, S. Mukherjee,
Y. Hasegawa and B. Weber, Phys. Rev. B 105, 094512(1-14) (2022).
* Joint research among groups within ISSP.

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4.

Superconductivity near the saddle point in the two-dimensional Rashba system Si(111)−√3×√3−(Tl,Pb): T. Machida,
Y. Yoshimura, T. Nakamura, Y. Kohsaka, T. Hanaguri, C. -R. Hsing, C. -M. Wei, Y. Hasegawa, S. Hasegawa and A.
Takayama, Phys. Rev. B 105, 064507(1-9) (2022).

5.

Numerical simulations for ferromagnetic resonance of nano-size island structures probed by radio-frequency scanningtunneling microscopy: Y. Sato, M. Haze, H.-H. Yang, K. Asakawa, S. Takahashi and Y. Hasegawa, Jpn. J. Appl. Phys.
61, 025001(1-6) (2022).

6.

スパースモデリングを活用した走査トンネル顕微鏡像解析 : 土師 将裕 , 吉田 靖雄 , 長谷川 幸雄 , 表面と真空 65, 78-83

7.

走査トンネル分光法 : 長谷川 幸雄 ,「図説表面分析ハンドブック」, 日本表面真空学会 , ( 朝倉出版 , 2021), 428-433.

(2022).

Lippmaa group
We have worked on developing the pulsed laser deposition process. In particular, we have studied the effect of the high-energy
ions in the ablation plume have on the properties of ceramic thin films. Our recent work shows that the plume energy is sufficient to cause local damage in thin films, as shown by thin film lattice parameter shifts from known bulk values. We haveshown that the kinetic damage to thin films can be effectively reduced by introducing a light inert buffer gas into the processchamber. Deposition of films in the presence of high-pressure He ambient gas does not significantly reduce the deposition rate,
but reduces the kinetic energy of the plume and thus enables the growth of higher-quality thin films with fewer point defects.
1.

Nanopillar composite electrodes for solar-driven water splitting: M. Lippmaa, S. Kawasaki, R. Takahashi and T.
Yamamoto, MRS Bulletin 46, 142-151 (2021).

2.

†He Buffer Gas for Moderating the Kinetic Energy of Pulsed Laser Deposition Plumes: R. Takahashi, T. Yamamoto and

3.

単結晶薄膜の自立化プロセスの開発 : 高橋 竜太 , リップマー ミック , セラミックス 56, 451-454 (2021).

4.

*Observation and control of the weak topological insulator state in ZrTe : P. Zhang, R. Noguchi, K. Kuroda, C. Lin, K.
55.

†Realization of closed-loop optimization of epitaxial titanium nitride thin-film growth via machine learning: I. Ohkubo,

M. Lippmaa, Cryst. Growth Des. 21, 5017-5026 (2021).

Kawaguchi, K. Yaji, A. Harasawa, M. Lippmaa, S. Nie, H. Weng, V. Kandyba, A. Giampietri, A. Barinov, Q. Li, G. D.
Gu, S. Shin and T. Kondo, Nat. Commun. 12, 406 (2021).
Z. Hou, J. N. Lee, T. Aizawa, M. Lippmaa, T. Chikyow, K. Tsuda and T. Mori, Mater. Today Phys. 16, 100296 (1-6)(2021).

Functional Materials Group
Yoshinobu group
We conducted several research projects in the fiscal year 2021: (1) The surface chemistry of hydrogen, formic acid and CO2
on Cu(977), Pd-Cu(111) and Pd-Cu(997) surfaces was studied by SR-PES, IRAS, HREELS and TPD. (2) The adsorption/
desorption of CH4 on Pt(997) was studied by TPD, IRAS and SR-XPS. (3) The dry reforming of CH4 with CO2 on Pt(997) was
studied by AP-XPS at SPring-8. (4) The reaction dynamics of CO + O -> CO2 on Pt(111) was studied by van der Waals DFT
calculations. (5) The micro-beam SR-XPS and AP-XPS were applied to study the MoS2 edge in vacuum and under hydrogenpressure. (6) The narrow band and broad band THz pulse generation system has been newly constructed.
1.

†Adsorption of CO on Terrace, Step, and Defect Sites on Pt Surfaces: A Combined TPD, XPS, and DFT Study: Y.
2

2.

†*Band Bending of n-GaN under Ambient H O Vapor Studied by X-ray Photoelectron Spectroscopy: Y. Imazeki, M.
2

3.

C–H Bond Activation of Methane through Electronic Interaction with Pd(110): T. Koitaya, A. Ishikawa, S. Yoshimotoand J. Yoshinobu, J. Phys. Chem. C 125, 1368 (2021).

4.

†*Comparative Study of H O and O Adsorption on the GaN Surface: M. Sato, Y. Imazeki, T. Takeda, M. Kobayashi, S.
2
2

Wong, Y. H. Choi, S. Tanaka, H. Yoshioka, K. Mukai, H. H. Halim, A. R. Mohamed, K. Inagaki, Y. Hamamoto, I.
Hamada, J. Yoshinobu and Y. Morikawa, J. Phys. Chem. C 125, 23657 (2021).

Sato, T. Takeda, M. Kobayashi, S. Yamamoto, I. Matsuda, J. Yoshinobu, M. Sugiyama and Y. Nakano, J. Phys. Chem. C
125, 9011 (2021).

Yamamoto, I. Matsuda, J. Yoshinobu, Y. Nakano and M. Sugiyama, J. Phys. Chem. C 125, 25807 (2021).
† Joint research with outside partners.

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5.

* 水素を活かすセラミクス

プロトンー電子カップル型分子性結晶および二分子膜における機能開拓 : 森 初果 , 加藤 浩之 ,藤野 智子 , 上田 顕 , 吉信 淳 , セラミックス 56, 88-91 (2021).

6.

Role of Intermolecular Interactions in the Catalytic Reaction of Formic Acid on Cu(111): A. Shiotari, S. E. M. Putra,
Y. Shiozawa, Y. Hamamoto, K. Inagaki, Y. Morikawa, Y. Sugimoto, J. Yoshinobu and I. Hamada, Small 2021, 2008010(2021).

7.

Theoretical study on adsorption and reaction of polymeric formic acid on the Cu(111) surface: S. E. M. Putra, F.
Muttaqien, Y. Hamamoto, K. Inagaki, A. Shiotari, J. Yoshinobu, Y. Morikawa and I. Hamada, Phys. Rev. Materials 5,075801 (2021).

8.

†*Structure and electronic structure of van der Waals interfaces at a Au(1 1 1) surface covered with a well-ordered

9.

†*Functionalization of the MoS basal plane for activation of molecular hydrogen by Pd deposition: F. Ozaki, S. Tanaka,
2molecular layer of n-alkanes: H. Mizushima, H. Koike, K. Kuroda, K. Yaji, A. Harasawa, Y. Ishida, M. Nakayama, K.
Mase, K. Mukai, T. Kitazawa, T. Kondo, J. Yoshinobu, S. Shin and K. Kanai, Applied Surface Science 535, 147673(2021).
W. Osada, K. Mukai, M. Horio, T. Koitaya, S. Yamamoto, I. Matsuda and J. Yoshinobu, Applied Surface Science 593,
153313 (2022).

10. †*Hydrogen absorption and diffusion behaviors in cube-shaped palladium nanoparticles revealed by ambient-pressure
X-ray photoelectron spectroscopy: J. Tang, O. Seo, D. S. R. Rocabado, T. Koitaya, S. Yamamoto, Y. Nanba, C. Song,J. Kim, A. Yoshigoe, M. Koyama, S. Dekura, H. Kobayashi, H. Kitagawa, O. Sakata, I. Matsuda and J. Yoshinobu,
Applied Surface Science 587, 152797 (2022).
11. *Tracking Ultrafast Change of Multiterahertz Broadband Response Functions in a Photoexcited Dirac Semimetal
Cd3As2 Thin Film: N. Kanda, Y. Murotani, T. Matsuda, M. Goyal, S. Salmani-Rezaie, J. Yoshinobu, S. Stemmer and R.
Matsunaga, Nano Letters 22, 2358 (2022).
12. ZrB2(0001) 薄膜表面上の二次元 Ge 二重三角格子 : 深谷 有喜 , 吉信 淳 , アントワーヌ フロランス , 高村 ( 山田 ) 由紀子 ,PF News 39-3, 21-27 (2021).
13. 巻頭言 界面におけるエネルギー変換・輸送と現代の課題 : 吉信 淳 , 表面と真空 64, 539 (2021).
14. Hydrogenomics: Efficient and Selective Hydrogenation of Stable Molecules Utilizing Three Aspects of Hydrogen: K.
Fukutani, J. Yoshinobu, M. Yamauchi, T. Shima and S. Orimo, Catal Lett 152, 1583-1597 (2022).
15. 図説 表面分析ハンドブック : 日本表面真空学会 ( 編集 ), ( 朝倉書店 , 東京都 , 2021).
16. “水素 " を使いこなすためのサイエンス ハイドロジェノミクス : 折茂 慎一 , 福谷 克之 , 藤田 健一（編）, ( 共立出版 , 東京
都文京区 , 2022).

Akiyama group
In 2021, we fabricated new series of gain-switched 1030-1060nm InGaAs laser diodes (LDs) changing various device parameters and investigated stable short seed-pulse generation conditions below 10 ps by current injection. We started study on heatrecovery (HERC) solar cells, and photo-voltaic and thermo-electric hybrid tandem cells, in collaboration with AIST team.
Collaborations on four-junction solar cells with China team and on CIGC cells with Tsukuba team have been started. As for bioand chemical-physics, we had significant progress in time-resolved Raman spectroscopy on channel rhodopsin with semiconductor-laser-based light sources (collaboration between a D3 student Shibata-kun and Inoue-group). Good progress has been
made in quantitative spectroscopy on bioluminescence quantum yield of new luciferin analogs (Akalumine, Tokeoni, etc.) andon photo-cleavage/photo-bleaching quantum yields of D-luciferin and coumarin-caged-luciferins, in collaboration with Gunmauniversity team.
1.

*High-harmonic generation in GaAs beyond the perturbative regime: P. Xia, T. Tamaya, C. Kim, F. Lu, T. Kanai, N.

2.

*Direct generation of sub-picosecond pulse via multi-section gain switching: T. Nakamura, T. Ito, H. Nakamae, C. Kim,

3.

Unidirectional output from a quantum-dot single-photon source hybrid integrated on silicon: R. Katsumi, Y. Ota, T.
Tajiri, M. Kakuda, S. Iwamoto, H. Akiyama and Y. Arakawa, Opt. Express 29, 37117 (2021).

4.

Fabricating over 7%-efficient Sb2(S,Se)3 thin-film solar cells by vapor transport deposition using Sb2Se3 and Sb2S3
mixed powders as the evaporation source: X. Hu, J. Tao, R. Wang, Y. Wang, Y. Pan, G. Weng, X. Luo, S. Chen, Z. Zhu,
J. Chu and H. Akiyama, Journal of Power Sources 493, 229737 (2021).

Ishii, J. Itatani, H. Akiyama and T. Kato, Phys. Rev. B 104, L121202(1-6) (2021).

Y. Hazama, Y. Kobayashi, R. Kuroda and H. Akiyama, Opt. Lett. 46, 1277 (2021).

* Joint research among groups within ISSP.

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5.

Superior single-mode lasing in a self-assembly CsPbX 3 microcavity over an ultrawide pumping wavelength range:
G. Weng, J. Yan, S. Chen, C. Zhao, H. Zhang, J. Tian, Y. Liu, X. Hu, J. Tao, S. Chen, Z. Zhu, H. Akiyama and J. Chu,
Photon. Res. 9, 54 (2021).

6.

Reducing Shockley–Read–Hall recombination losses in the depletion region of a solar cell by using a wide-gap emitter
layer: T. Nakamura, W. Yanwachirakul, M. Imaizumi, M. Sugiyama, H. Akiyama and Y. Okada, Journal of Applied
Physics 130, 153102 (2021).

7.

Absorption Spectra for Firefly Bioluminescence Substrate Analog: TokeOni in Various pH Solutions: H. Ogawa, R. Ono,
Y. Noguchi, N. Kitada, R. Saito-Moriya, S. A. Maki, H. Akiyama, H. Itabashi and M. Hiyama, Photochem Photobiol 97,
1016 (2021).

8.

High performance single-mode vertical cavity surface emitting lasers based on CsPbBr3 nanocrystals with simplified
processing: C. Zhao, J. Tao, J. Tian, G. Weng, H. Liu, Y. Liu, J. Yan, S. Chen, Y. Pan, X. Hu, S. Chen, H. Akiyama and J.
Chu, Chemical Engineering Journal 420, 127660 (2021).

9.

Electron–Hole Plasma Lasing Dynamics in CsPbCl m Br 3-m Microplate Lasers: G. Weng, J. Tian, S. Chen, J. Yan, H.
Zhang, Y. Liu, C. Zhao, X. Hu, X. Luo, J. Tao, S. Chen, Z. Zhu, J. Chu and H. Akiyama, ACS Photonics 8, 787 (2021).

10. Adaptive automatic solar cell defect detection and classification based on absolute electroluminescence imaging: Y.
Wang, L. Li, Y. Sun, J. Xu, Y. Jia, J. Hong, X. Hu, G. Weng, X. Luo, S. Chen, Z. Zhu, J. Chu and H. Akiyama, Energy
229, 120606 (2021).
11. Enhanced Magneto-Optical Kerr Effect of GaAs-Based P-N Junctions in the Terahertz Range: K. Miyagawa, M. Nagai,
M. Ashida, C. Kim and H. Akiyama, J Infrared Milli Terahz Waves 42, 325 (2021).
12. Diagnosing breakdown mechanisms in monocrystalline silicon solar cells via electroluminescence imaging: Y. Jia, Y.
Wang, X. Hu, J. Xu, G. Weng, X. Luo, S. Chen, Z. Zhu and H. Akiyama, Solar Energy 225, 463 (2021).
13. Improving the performance of Sb2S3 thin-film solar cells by optimization of VTD source-substrate proximity: R. Wang,
Y. Wang, Y. Pan, D. Qin, G. Weng, X. Hu, J. Tao, X. Luo, S. Chen, Z. Zhu, J. Chu and H. Akiyama, Solar Energy 220,
942 (2021).
14. Electroluminescence imaging of laser induced defect formation in Cu(In, Ga)Se2 solar cell: Y. Jia, Y. Wang, X. Hu, G.
Weng, J. Tian, X. Luo, S. Chen, Z. Zhu and H. Akiyama, Solar Energy Materials and Solar Cells 230, 111160 (2021).
15. レーザー加工用 LD シード光源の開発―ピコ秒利得スイッチ半導体レーザー : 中村 考宏 , 中前 秀一 , 金昌 秀 , ソダーバン
ル ハッサネット , 杉山 正和 , 秋山 英文 , レーザ加工学会誌 28, 30-35 (2021).
16. Subcells Analysis of Thin-Film Four-Junction Solar Cells Using Optoelectronic Reciprocity Relation: J. Long, Q. Sun,
X. Li, P. Dai, M. Song, L. Zhu, H. Akiyama, J. Lu and S. Lu, Sol. RRL 5, 2000542 (2021).
17. Photo-bleaching of firefly luciferin with UV irradiation: R. Kumagai, R. Ono, H. Akiyama, H. Itabashi and M. Hiyama,
Chemical Physics Letters 792, 139414 (2022).
18. Carrier dynamics of AlGaAs/AlAs asymmetric double quantum wells with different barrier thickness: Y. Liu, G. Weng,
F. Cao, Y. Wang, W. Wan, C. Wang, H. Nakamae, C. Kim, X. Hu, X. Luo, S. Luo, S. Chen, J. Chu and H. Akiyama, Opt.
Mater. Express 12, 1291 (2022).

Sugino group
Target of Sugino group is to advance computational materials science using modern density functional theory (DFT). This wasproceeded by improving the density functional through machine-learning of the many-body wave function of materials. Our
machine-learning method was found to provide reasonably accurate electronic structures not only for molecules but also bulk
solids, showing a promise for further improvement toward the chemical accuracy. Electron-phonon coupling is another key tothe improvement. Effect of nuclear motion on the band gap was investigated using perturbative or non-perturbative method
gaining insight into the material dependence. Applying DFT to various materials was intensively done for the phase problems ofgraphite intercalations, solid oxygen, and cuprates in addition to our continued study on electrochemical interfaces.
1.

Optical representation of thermal nuclear fluctuation effect on band-gap renormalization: K. Ishii, J. Haruyama and O.
Sugino, Phys. Rev. B 104, 245144 (2021).

2.

Functional-renormalization-group approach to classical liquids with short-range repulsion: A scheme without repulsivereference system: T. Yokota, J. Haruyama and O. Sugino, Phys. Rev. E 104, 014124 (2021).

3.

†Thermodynamic Analysis of Li-Intercalated Graphite by First-Principles Calculations with Vibrational and Configura-† Joint research with outside partners.

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tional Contributions: J. Haruyama, S. Takagi, K. Shimoda, I. Watanabe, K. Sodeyama, T. Ikeshoji and M. Otani, J. Phys.
Chem. C 125, 27891 (2021).
4.

†Ab initio construction of the energy density functional for electron systems with the functional-renormalization-group-

5.

†Advances and challenges for experiment and theory for multi-electron multi-proton transfer at electrified solid-liquid

6.

†Machine-learning-based exchange correlation functional with physical asymptotic constraints: R. Nagai, R. Akashi and

7.

†Roadmap on Machine Learning in Electronic Structure: R. Nagai, R. Akashi and O. Sugino, Electron. Struct. 1, 37-38(2022).

aided density functional theory: T. Yokota and T. Naito, Phys. Rev. Research 3, L012015 (2021).

interfaces: K. Sakaushi, T. Komeda, S. Hammes-Schiffer, M. M. Melander and O. Sugino, PHYSICAL CHEMISTRYCHEMICAL PHYSICS 22, 19401-19442 (2021).
O. Sugino, Phys. Rev. Research 4, 013106 (2022).

Oka group
The Oka group has proposed a theory of geometric effects in non-adiabatic tunneling and applied it to strong field excitations in
Dirac and Weyl semimetals.
1.

Nonperturbative topological current in Weyl and Dirac semimetals in laser fields: R. M. A. Dantas, Z. Wang, P. Surówka
and T. Oka, Phys. Rev. B 103, L201105 (2021).

2.

Scanning Tunneling Microscopy as a Single Majorana Detector of Kitaev’s Chiral Spin Liquid: M. Udagawa, S. Takayoshi and T. Oka, Phys. Rev. Lett. 126, 127201 (2021).

3.

Nonadiabatic nonlinear optics and quantum geometry — Application to the twisted Schwinger effect: S. Takayoshi, J.
Wu and T. Oka, SciPost Phys. 11, 075 (2021).

Inoue group
In 2021, we reported a new machine learning method to predict rhodopsin genes having red-shifted absorption. By applying
this method, ion pumping rhodopsin exhibiting absorption wavelength 40-nm longer than known proteins was discovered.
The crystal structure of schizorhodopsin (SzR), which is a new type of inward proton pump first characterized in 2020, by
X-ray crystallography. It revealed that transmembrane helices of SzR are shortened on the cytoplasmic side enabling rapid
proton release to the cytoplasmic solvent. We found thermostable SzRs from thermophilic archaea. This finding suggests thatin addition to general outward proton pumping rhodopsins, various types of microbial rhodopsins are used in high-temperatureenvironments.
1.

TAT Rhodopsin Is an Ultraviolet-Dependent Environmental pH Sensor: C. Kataoka, T. Sugimoto, S. Shigemura, K.
Katayama, S. P. Tsunoda, K. Inoue, O. Béjà and H. Kandori, Biochemistry 60, 899-907 (2021).

2.

Crystal structure of schizorhodopsin reveals mechanism of inward proton pumping: A. Higuchi, W. Shihoya, M. Konno,
T. Ikuta, H. Kandori, K. Inoue and O. Nureki, Proc. Natl. Acad. Sci. USA 118, e2016328118 (2021).

3.

Thermostable light-driven inward proton pump rhodopsins: Y. Kawasaki, M. Konno and K. Inoue, Chemical Physics
Letters 779, 138868 (2021).

4.

Exploration of natural red-shifted rhodopsins using a machine learning-based Bayesian experimental design: K. Inoue,
M. Karasuyama, R. Nakamura, M. Konno, D. Yamada, K. Mannen, T. Nagata, Y. Inatsu, H. Yawo, K. Yura, O. Béjà, H.
Kandori and I. Takeuchi, Commun. Biol. 4, 362 (2021).

5.

Pro219 is an electrostatic color determinant in the light-driven sodium pump KR2: Y. Nakajima, L. Pedraza-González,L. Barneschi, K. Inoue, M. Olivucci and H. Kandori, Commun. Biol. 4, 1185 (2021).

6.

Ion Transport Activity Assay for Microbial Rhodopsin Expressed in Escherichia coli Cells: M. Konno, K. Inoue and H.
Kandori, bio-protocol 11, e4115 (2021).

7.

Heliorhodopsin Evolution Is Driven by Photosensory Promiscuity in Monoderms: P.-A. Bulzu, V. S. Kavagutti, M.-C.
Chiriac, C. D. Vavourakis, K. Inoue, H. Kandori, A.-S. Andrei, R. Ghai and S. J. Hallam, mSphere 6, e00661-21 (2021).

8.

Structural characterization of proton-pumping rhodopsin lacking a cytoplasmic proton donor residue by X-ray crystallography: K. Suzuki, M. D. C. Marín, M. Konno, R. Bagherzadeh, T. Murata and K. Inoue, J. Biol. Chem. 298, 101722(2022).
* Joint research among groups within ISSP.

76

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9.

Diverse heliorhodopsins detected via functional metagenomics in freshwater Actinobacteria , Chloroflexi and Archaea:
A. Chazan, A. Rozenberg, K. Mannen, T. Nagata, R. Tahan, S. Yaish, S. Larom, K. Inoue, O. Béjà and A. Pushkarev,
Environmental Microbiology 24, 110-121 (2022).

10. Saccharibacteria harness light energy using type-1 rhodopsins that may rely on retinal sourced from microbial hosts: A.
L. Jaffe, M. Konno, Y. Kawasaki, C. Kataoka, O. Béjà, H. Kandori, K. Inoue and J. F. Banfield, ISME J, published on
the web (2022).
11. 第３のロドプシン：ヘリオロドプシン : 井上 圭一 , 化学と工業 74, 307 (2021).
12. Expanding horizons of biosciences by light-control: M. Kataoka and T. Nagata, Biophysics and Physicobiology 18,
13-15 (2021).
13. Microbial Rhodopsins: The Last Two Decades: A. Rozenberg, K. Inoue, H. Kandori and O. Béjà, Annu. Rev. Microbiol.
75, published on the web (2021).
14. Rhodopsins at a glance: T. Nagata and K. Inoue, J. Cell Sci. 134, jcs258989 (2021).
15. Application of Optogenetics for Muscle Cells and Stem Cells: T. Asano, D. B. L. Teh and H. Yawo, in: Optogenetics,
edited by Hiromu Yawo, Hideki Kandori, Amane Koizumi, Ryoichiro Kageyama, (Springer Nature, 2021), 359-375.
16. Diversity, Mechanism, and Optogenetic Application of Light-Driven Ion Pump Rhodopsins: K. Inoue, in: Optogenetics,
edited by Hiromu Yawo, Hideki Kandori, Amane Koizumi, Ryoichiro Kageyama, (Springer Nature, 2021), 89-126.
17. ロドプシンが拓くタンパク質科学の地平 : 井上 圭一 ,「未来探究２０５０ 東大 30 人の知性が読み解く世界」, 東京大学未来ビジョン研究センター , ( 日本経済新聞出版 , 2021), 74-83.

Quantum Materials Group
Oshikawa group
We continued theoretical studies on a wide range of subjects in many-body physics. In particular, we successfully implemented
the "Level Spectroscopy" based on tensor-network renormalization group on the 2-dimensional classical XY model. This model
is a canonical model to exhibit the Berezinskii-Kosterlitz-Thouless (BKT) transition, which is a prototypical topological phasetransition. Although it has been studied for more than half century, the logarithmic correction makes a precise determination of
the transition point rather challenging. By utilizing the powerful finite-scaling of conformal field theory and the modern numerical algorithm, we have succeeded in an extremely accurate determination of the BKT transition point, as well as a visualizationof the Renormalization-Group flow based on the actual numerical data.
1.

Resolving the Berezinskii-Kosterlitz-Thouless transition in the two-dimensional XY model with tensor-network-based
level spectroscopy: A. Ueda and M. Oshikawa, Phys. Rev. B 104, 165132 (2021).

2.

†SU(4)-symmetric quantum spin-orbital liquids on various lattices: M. G. Yamada, M. Oshikawa and G. Jackeli, Phys.

3.

†Two-wire junction of inequivalent Tomonaga-Luttinger liquids: Y.-T. Kang, C.-Y. Lo, M. Oshikawa, Y.-J. Kao and P.

4.

†Non-Fermi Liquids in Conducting Two-Dimensional Networks: J. M. Lee, M. Oshikawa and G. Y. Cho, Phys. Rev.

5.

Twisted Boundary Condition and Lieb-Schultz-Mattis Ingappability for Discrete Symmetries: Y. Yao and M. Oshikawa,Phys. Rev. Lett. 126, 217201 (2021).

6.

†Photon Echo from Lensing of Fractional Excitations in Tomonaga-Luttinger Spin Liquid: Z.-L. Li, M. Oshikawa and Y.

7.

Chiral approximation to twisted bilayer graphene: Exact intravalley inversion symmetry, nodal structure, and implications for higher magic angles: J. Wang, Y. Zheng, A. J. Millis and J. Cano, Phys. Rev. Research 3,, 023155 (2021).

8.

Topological field theories and symmetry protected topological phases with fusion category symmetries: K. Inamura,
Journal of High Energy Physics 2021, 204 (2021).

9.

†Parafermionization, bosonization, and critical parafermionic theories: Y. Yao and A. Furusaki, J. High Energ. Phys.

Rev. B 104, 224436 (2021).

Chen, Phys. Rev. B 104, 235142 (2021).
Lett. 126, 186601 (2021).

Wan, Phys. Rev. X 11, 031035 (2021).

† Joint research with outside partners.

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77

2021, 285 (2021).
10. Fermionization and boundary states in 1+1 dimensions: Y. Fukusumi, Y. Tachikawa and Y. Zheng, SciPost Phys. 11, 082(2021).
11. †Remarks on compatibility between conformal symmetry and continuous higher-form symmetries: Y. Lee and Y. Zheng,
Physical Review D 104, 085005 (1-7) (2021).
12. Kramers-Wannier-like Duality Defects in (3+1)D Gauge Theories: J. Kaidi, K. Ohmori and Y. Zheng, Phys. Rev. Lett.
128, 111601 (2022).
13. On lattice models of gapped phases with fusion category symmetries: K. Inamura, J. High Energ. Phys. 2022, 36 (2022).

Nakatsuji group
A new era in quantum materials research arises, featuring discoveries of novel topological phases of matter and emergent quasiparticle excitations behaving as elusive elementary particles. Our research activities focus on designing and synthesizing newmaterials with emergent quantum properties that have never been seen before, then exploring the physics behind such properties with our world-leading measurement facilities. We aim to lead the innovative quest for new quantum materials that bear a
far-reaching impact not only on basic science but also on our everyday life in the future. Major research themes: 1. Solid-stateanalogs of relativistic particles and new quantum phenomena · Weyl fermion and chiral anomaly · Quantum spin ice, magnetic
monopole, and emergent photon 2. Room-temperature quantum transport phenomena in topological magnetic materials · Weyl
antiferromagnets and their application to spintronic devices · Giant thermal and optical responses driven by the Berry curvature
3. Quantum phase transition in strongly correlated systems · Non-Fermi-liquid behavior and exotic superconductivity in multipolar Kondo materials
1.

6-GHz lattice response in a quantum spin-orbital liquid probed by time-resolved resonant x-ray scattering: K. Takubo, T.
Mizokawa, H. Man, K. Yamamoto, Y. Zhang, Y. Hirata, H. Wadati, D. I. Khomskii and S. Nakatsuji, Phys. Rev. B 104,
205110 (2021).

2.

Logarithmic criticality in transverse thermoelectric conductivity of the ferromagnetic topological semimetal CoMnSb:
H. Nakamura, S. Minami, T. Tomita, A. A. Nugroho and S. Nakatsuji, Phys. Rev. B 104, L161114 (2021).

3.

*Low Gilbert damping in epitaxial thin films of the nodal-line semimetal D0 -Fe Ga: S. Sakamoto, T. Higo, S. Tamaru,
3
3

4.

*Observation of spontaneous x-ray magnetic circular dichroism in a chiral antiferromagnet: S. Sakamoto, T. Higo, M.

5.

*Domain structure and domain wall dynamics in topological chiral antiferromagnets from the viewpoint of magnetic

6.

Simultaneous enhancements of thermopower and electrical conductivity in quasi-one-dimensional α -YbAlB 4 single
crystal: K. Kuga, M. Matsunami, S. Singh, S. Nakatsuji and T. Takeuchi, Appl. Phys. Lett. 119, 223905 (2021).

H. Kubota, K. Yakushiji, S. Nakatsuji and S. Miwa, Phys. Rev. B 103, 165122 (1-5) (2021).
Shiga, K. Amemiya, S. Nakatsuji and S. Miwa, Phys. Rev. B 104, 134431 (1-6) (2021).
octupole: Y. Otani and T. Higo, Appl. Phys. Lett. 118, 040501 (2021).

7. トポロジカル磁性体が拓く新たな応用展開 量子制御による革新的機能の創製に向けて : 中辻 知 , 応用物理 90, 221-229(2021).
8.
9.

* ワイル反強磁性金属 Mn Sn 薄膜の室温テラヘルツ異常ホール効果 : 松田 拓也 , 肥後 友也 , 神田 夏輝 , 松永 隆佑 , 応

用物理 90, 752 (2021).

3*Omnidirectional Control of Large Electrical Output in a Topological Antiferromagnet: T. Higo, Y. Li, K. Kondou, D.

Qu, M. Ikhlas, R. Uesugi, D. Nishio-Hamane, C. L. Chien, Y. Otani and S. Nakatsuji, Adv. Funct. Mater. 31, 2008971(2021).

10. *Spin-orbit torque switching of the antiferromagnetic state in polycrystalline Mn3Sn/Cu/heavy metal heterostructures:
H. Tsai, T. Higo, K. Kondou, A. Kobayashi, T. Nakano, K. Yakushiji, S. Miwa, Y. Otani and S. Nakatsuji, AIP Advances
11, 045110 (1-6) (2021).
11. Anomalous transport due to Weyl fermions in the chiral antiferromagnets Mn3X, X=Sn, Ge: T. Chen, T. Tomita, S.
Minami, M. Fu, T. Koretsune, M. Kitatani, I. Muhammad, D. Nishio-Hamane, R. Ishii, F. Ishii, R. Arita and S. Nakatsuji, Nat. Commun. 12, 572 (2021).
12. Monopolar and dipolar relaxation in spin ice Ho2Ti2O7: Y. Wang, T. Reeder, Y. Karaki, J. Kindervater, T. Halloran,
N. Maliszewskyi, Y. Qiu, J. A. Rodriguez, S. Gladchenko, S. M. Koohpayeh, S. Nakatsuji and C. Broholm, Science
Advances 7(1-10) (2021).
* Joint research among groups within ISSP.

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ISSP Activity Report 2021

13. Monopolar and dipolar relaxation in spin ice Ho2Ti2O7: Y. Wang, T. Reeder, Y. Karaki, J. Kindervater, T. Halloran, N.
Maliszewskyj, Y. Qiu, J. A. Rodriguez, S. Gladchenko, S. M. Koohpayeh, S. Nakatsuji and C. Broholm, Sci. Adv. 7,
eabg0908 (2021).
14. *Fabrication of polycrystalline Weyl antiferromagnetic Mn3Sn thin films on various seed layers: T. Nakano, T. Higo, A.
Kobayashi, S. Miwa, S. Nakatsuji and K. Yakushiji, Phys. Rev. Materials 5, 054402 (1-9) (2021).
15. Spin-orbital liquid in Ba3CuSb2O9 stabilized by oxygen holes: K. Takubo, H. Man, S. Nakatsuji, K. Yamamoto, Y.
Zhang, Y. Hirata, H. Wadati, A. Yasui, T. Mizokawa and D. I. Khomskii, Phys. Rev. Materials 5, 075002 (2021).
16. Giant field-like torque by the out-of-plane magnetic spin Hall effect in a topological antiferromagnet: K. Kondou, H.
Chen, T. Tomita, M. Ikhlas, T. Higo, A. H. MacDonald, S. Nakatsuji and Y. Otani, Nat Commun 12, 6491 (2021).
17. Inhomogeneous Kondo-lattice in geometrically frustrated Pr2Ir2O7: M. Kavai, J. Friedman, K. Sherman, M. Gong, I.
Giannakis, S. Hajinazar, H. Hu, S. E. Grefe, J. Leshen, Q. Yang, S. Nakatsuji, A. N. Kolmogorov, Q. Si, M. Lawler and
P. Aynajian, Nat Commun 12, 1377 (2021).
18. X-ray study of ferroic octupole order producing anomalous Hall effect: M. Kimata, N. Sasabe, K. Kurita, Y. Yamasaki,
C. Tabata, Y. Yokoyama, Y. Kotani, M. Ikhlas, T. Tomita, K. Amemiya, H. Nojiri, S. Nakatsuji, T. Koretsune, H. Nakao,
T.-H. Arima and T. Nakamura, Nat Commun 12, 5582 (2021).
19. High-temperature antiferromagnetism in Yb based heavy fermion systems proximate to a Kondo insulator: S. Suzuki, K.
Takubo, K. Kuga, W. Higemoto, T. U. Ito, T. Tomita, Y. Shimura, Y. Matsumoto, C. Bareille, H. Wadati, S. Shin and S.
Nakatsuji, Phys. Rev. Research 3, 023140 (2021).
20. *Giant Effective Damping of Octupole Oscillation in an Antiferromagnetic Weyl Semimetal: S. Miwa, S. Iihama, T.
Nomoto, T. Tomita, T. Higo, M. Ikhlas, S. Sakamoto, Y. Otani, S. Mizukami, R. Arita and S. Nakatsuji, Small Science 1,
2000062 (1-8) (2021).
21. *Large Hall Signal due to Electrical Switching of an Antiferromagnetic Weyl Semimetal State: H. Tsai, T. Higo, K.
Kondou, S. Sakamoto, A. Kobayashi, T. Matsuo, S. Miwa, Y. Otani and S. Nakatsuji, Small Science 1, 2000025 (1-9)(2021).
22. Logarithmic Criticality in Transverse Thermoelectric Conductivity of the Ferromagnetic Topological Semimetal
CoMnSb: H. Nakamura, S. Minani, T. Tomita, A. A. Nugroho and S. Nakatsuji, Condensed Materials Materials Science
arXiv:2105.12098, 1-6 (2021).
23. Phonon spectrum of Pr2Zr2O7 and Pr2Ir2O7 as evidence of coupling of the lattice with electronic and magnetic degrees
of freedom: Y. Xu, H. Man, N. Tang, T. Ohtsuki, S. Baidya, S. Nakatsuji, D. Vanderbilt and N. Drichko, Phys. Rev. B
105, 075137 (2022).
24. Ferrimagnetic compensation and its thickness dependence in TbFeCo alloy thin films: M. Ishibashi, K. Yakushiji, M.
Kawaguchi, A. Tsukamoto, S. Nakatsuji and M. Hayashi, Applied Physics Letters 120, 022405-1 and 4 (2022).
25. Topological Magnets: Functions Based on Berry Phase and Multipoles: S. Nakatsuji and R. Arita, Annu. Rev. Condens.
Matter Phys. 13, annurev-conmatphys-031620-103859 (2022).

Miwa group
We have studied the following topics this year: (1) Time-resolved spin dynamics and (2) x-ray magnetic circular dichroism on achiral antiferromagnet Mn3Sn, (3) microscopic understanding of perpendicular magnetic anisotropy at Fe/MgO. In topic (1), we
find giant effective damping of the octupole polarization (ferroic order in the chiral antiferromagnet Mn3Sn) due to exchangeenhanced spin dynamics (Small Sci. 1, 2000062). This is a work in collaboration with Nakatsuji and Otani groups. In topic (2),
we have succeeded in preparing an epitaxial thin film of Mn3Sn(1-100) and observing x-ray magnetic circular dichroism signals
from the octupole polarization in Mn3Sn. The signal comes from the magnetic dipole Tz term of Mn atoms (Phys. Rev. B 104,
134431). This is a work in collaboration with Nakatsuji group. In topic (3), we find the perpendicular magnetic anisotropy in
Fe/MgO system can be enhanced by reducing in-plane tensile strain in Fe ultrathin film (Phys. Rev. B 104, L140406).
1.

Influence of epitaxial strain on the perpendicular magnetic anisotropy of Fe/MgO systems: M. Shiga, S. Sakamoto, T.
Tsujikawa, R. Ando, K. Amemiya and S. Miwa, Phys. Rev. B 104, L140406 (1-6) (2021).

2.

*Low Gilbert damping in epitaxial thin films of the nodal-line semimetal D0 -Fe Ga: S. Sakamoto, T. Higo, S. Tamaru,
3
33.

*Observation of spontaneous x-ray magnetic circular dichroism in a chiral antiferromagnet: S. Sakamoto, T. Higo, M.

H. Kubota, K. Yakushiji, S. Nakatsuji and S. Miwa, Phys. Rev. B 103, 165122 (1-5) (2021).

† Joint research with outside partners.

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79

Shiga, K. Amemiya, S. Nakatsuji and S. Miwa, Phys. Rev. B 104, 134431 (1-6) (2021).
4.

Quasi-maser operation using magnetic tunnel junctions: Y. Yamada, M. Goto, T. Yamane, N. Degawa, T. Suzuki, A.
Shimura, S. Aoki, T. Mizuno, J. Urabe, S. Hara, S. Miwa and Y. Suzuki, Appl. Phys. Lett. 118, 192402 (1-5) (2021).

5.

Physically Unclonable Functions With Voltage-Controlled Magnetic Tunnel Junctions: Y. Tanaka, M. Goto, A. K.
Shukla, K. Yoshikawa, H. Nomura, S. Miwa, S. Tomishima and Y. Suzuki, IEEE Trans. Magn. 57, 3400806 (1-6)(2021).

6.

*Spin-orbit torque switching of the antiferromagnetic state in polycrystalline Mn Sn/Cu/heavy metal heterostructures:
3

7.

*Fabrication of polycrystalline Weyl antiferromagnetic Mn Sn thin films on various seed layers: T. Nakano, T. Higo, A.
3

8.

Investigation of the thermal tolerance of silicon-based lateral spin valves: N. Yamashita, S. Lee, R. Ohshima, E. Shigematsu, H. Koike, Y. Suzuki, S. Miwa, M. Goto, Y. Ando and M. Shiraishi, Sci Rep 11, 10583 (2021).

9.

*Giant Effective Damping of Octupole Oscillation in an Antiferromagnetic Weyl Semimetal: S. Miwa, S. Iihama, T.

H. Tsai, T. Higo, K. Kondou, A. Kobayashi, T. Nakano, K. Yakushiji, S. Miwa, Y. Otani and S. Nakatsuji, AIP Advances
11, 045110 (1-6) (2021).
Kobayashi, S. Miwa, S. Nakatsuji and K. Yakushiji, Phys. Rev. Materials 5, 054402 (1-9) (2021).

Nomoto, T. Tomita, T. Higo, M. Ikhlas, S. Sakamoto, Y. Otani, S. Mizukami, R. Arita and S. Nakatsuji, Small Science 1,
2000062 (1-8) (2021).

10. *Large Hall Signal due to Electrical Switching of an Antiferromagnetic Weyl Semimetal State: H. Tsai, T. Higo, K.
Kondou, S. Sakamoto, A. Kobayashi, T. Matsuo, S. Miwa, Y. Otani and S. Nakatsuji, Small Science 1, 2000025 (1-9)(2021).
11. Synthetic Rashba spin–orbit system using a silicon metal-oxide semiconductor: S. Lee, H. Koike, M. Goto, S. Miwa, Y.
Suzuki, N. Yamashita, R. Ohshima, E. Shigematsu, Y. Ando and M. Shiraishi, Nat. Mater. 20, 1228-1232 (2021).
12. Reservoir computing based on spintronics technology (p339-p360), Reservoir computing [Editor: K. Nakajima and I.
Fischer]: T. Taniguchi, S. Tsunegi, S. Miwa, K. Fujii, H. Kubota and K. Nakajima, (Springer, Singapore, 2021).
13. Electron Correlation Enhances Orbital Polarization at a Ferromagnetic Metal/Insulator Interface: Depth-Resolved X-ray
Magnetic Circular Dichroism and First-Principles Study: S. Sakamoto, M. Tsujikawa, M. Shirai, K. Amemiya and S.
Miwa, ACS Appl. Electron. Mater. 4, 1794-1799 (2022).

Division of Data-Integrated Materials Science
Fukushima group
This year, we have developed a fundamental simulation code for investigating the material properties of permanent magnets andspintronic materials. The automatic exhaustive calculations, which are based on the all-electron full-potential (Korringa-KohnRostoker) KKR Green's function method (FPKKR), have been performed. Since the potential is anisotropic rather than spherically symmetric, it is possible to calculate not only the magnetization and Curie temperature but also the magneto-crystalline
anisotropy energy constant with high accuracy. The KKR Green's function method can be conveniently combined with thecoherent potential approximation (CPA). It is free from using supercells, resulting in reduced computational costs drastically.
Therefore, our code can perform efficient calculations for a huge number of compositions of disordered alloys, compared tothe other simulation code. We have applied this code to several magnetic materials, such as YCo5 alloys, SmCo5 alloys, andSm2Fe17N3 alloys. We have also systematically investigated the electronic structure, intrinsic defect formation, and transport
properties of Cu2S by first-principles calculations, using a theoretical model called an acanthite-like structure. The transport
properties of Cu2S system have been successfully reproduced using an electron-phonon scattering method, highlighting theimportant role of relaxation time prediction in conductivity estimation instead of regarding it as a constant.
1.

First-principles calculation of electronic density of states and Seebeck coefficient in transition-metal-doped Si–
Ge alloys: R. Yamada, A. Masago, T. Fukushima, H. Shinya, T. Q. Nguyen and K. Sato, Solid State Commun. 323,
110227(1-8) (2021).

2.

Effect of atomic configuration on magnetic properties and electronicstate of CoVMnAl quaternary heusler alloy: R.
Y. Umetsu, K. Saito, K. Ono, T. Fukushima, F. Kuroda, T. Oguchi and T. Ishigaki, J. Alloys Compd. 855, 157389(1-9)(2021).

3.

Ferromagnetism and giant magnetoresistance in zinc-blende FeAs monolayers embedded in semiconductor structures:* Joint research among groups within ISSP.

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L. D. Anh, T. Hayakawa, Y. Nakagawa, H. Shinya, T. Fukushima, M. Kobayashi, H. Katayama-Yoshida, Y. Iwasa and
M. Tanaka, Nat. Commun. 12, 4201(1-10) (2021).
4.

Theoretical prediction of large anisotropic magnetocaloric effect in MnP: H. B. Tran, T. Fukushima, H. Momida, K.
Sato, Y. Makino and T. Oguchi, Comput. Mater. Sci. 188, 110227(1-8) (2021).

5.

Intrinsic defect formation and the effect of transition metal doping on transport properties in a ductile thermoelectricmaterial α-Ag2S: a first-principles study: H. N. Nam, R. Yamada, H. Okumura, T. Q. Nguyen, K. Suzuki, H. Shinya, A.
Masago, T. Fukushima and K. Sato, Phys. Chem. Chem. Phys 23, 9773-9784 (2021).

6.

Low-temperature acanthite-like phase of Cu2S: electronic and transport properties: H. N. Nam, K. Suzuki, T. Q.
Nguyen, A. Masago, H. Shinya, T. Fukushima and K. Sato, Phys. Rev. B 105, 075205(1-11) (2022).

7.

A first-principles study on the electrical conductivity of Ag2S1-xSex (x=0, 0.25, 0.5): Electron-phonon coupling:
71. H. N. Nam, K. Suzuki, A. Masago, T. Q. Nguyen, H. Shinya, T. Fukushima and K. Sato, Appl. Phys. Lett. 120,
143903(1-6) (2022).

8.

*Automatic exhaustive calculations of large material space by Korringa-Kohn-Rostoker coherent potential approxima-

9.

Mn 基ホイスラー合金の磁気特性と電子状態 : 梅津 理恵 , 斉藤 耕太郎 , 小野 寛太 , 佐藤 和則 , 福島 鉄也 , 黒田 文彬 ,小口 多美夫 , まてりあ 60, 205-211 (2021).

tion method — Applied to equiatomic quaternary high entropy alloys: T. Fukushima, H. Akai, T. Chikyow and H. Kino,
Pays. Rev. Mater. 6, 023802(1-19) (2022).

10. 半導体スピントロニクス材料のデザイン : 佐藤 和則 , 真砂 啓 , 福島 鉄也 , 新屋ひ かり ,「スピントロニクスのための計算機
ナノマテリアルデザイン」, 吉田博 , ( 内田老鶴圃 , 2022), 167-188.

Materials Design and Characterization Laboratory
Hiroi group
The high-pressure synthesis, crystal structure, and magnetic properties of four novel transition-metal
oxyhydrides─Ba2NaVO3H3, Ba2NaVO2.4H3.6, Ba2NaCrO2.2H3.8, and Ba2NaTiO3H3─crystallizing in the double-perovskite
structure were reported. We studied the pyrochlore oxide Hg2Os2O7 through thermodynamic measurements, muon spin rotation(μSR) spectroscopy and neutron diffraction experiments. A magnetic transition, probably to an AIAO-type order, was observed
at 88 K, while the resistivity showed a decrease at the transition and remained metallic down to 2 K. Thus, the ground state of
Hg2Os2O7 is most likely an AIAO semimetal, which is analogous to the intermediate-temperature state of Cd2Os2O7. Hg2Os2O7
exists on the verge of the metal–insulator boundary on the metal side and provides an excellent platform for studying theelectronic instability of 5delectrons with moderate electron correlations and strong spin–orbit interactions. Substitution effects
of Os for Ru in α-RuCl3 are investigated in a wide composition range of 0 ≤ x ≤ 0.67 in Ru1−xOsxCl3 by X-ray and electron
diffraction, magnetic susceptibility, heat capacity, and Raman spectroscopy measurements. Apart from the Kitaev physics with
antiferromagnetic interactions increasing with x, a rich phase diagram is obtained, which includes an antiferromagnetic longrange order below 12 K for x ≤ 0.15, a dome-shaped spin-singlet dimer phase below 130 K for 0.15 ≤ x ≤ 0.40, and a magnetic
short-range order for x > 0.40. NaAlSi is an sp electron superconductor crystallizing in a layered structure of the anti-PbFCl
type with a relatively high transition temperature Tc of ~7 K. We successfully prepared single crystals of NaAlSi by a Na–Ga
flux method and characterized their superconducting and normal-state properties through electrical resistivity, magnetization,and heat capacity measurements. A sharp superconducting transition with a Tc of 6.8 K is clearly observed, and heat capacity
data suggest an anisotropic superconducting gap. Surprisingly, despite the sp electron system, the normal state is governed by
the electron correlations, which is indicated by a T2 resistivity and a Wilson ratio of 2.0. The origin of the electron correlation
may be related to the orthogonal saddle-shaped Fermi surfaces derived from the Si px and py states, which intersect with thelight Al s bands to form the nodal lines near the Fermi level.
1.

Extremely Large Magnetoresistance in the Hourglass Dirac Loop Chain Metal β-ReO2: D. Hirai, T. Anbai, S. Uji, T.
Oguchi and Z. Hiroi, J. Phys. Soc. Jpn. 90, 094708 (2021).

2.

Superconductivity in the Topological Nodal-line Semimetal NaAlSi: T. Yamada, D. Hirai, H. Yamane and Z. Hiroi, J.
Phys. Soc. Jpn. 90, 034710 (2021).

3.

*Universal Dynamics of Magnetic Monopoles in Two-Dimensional Kagomé Ice: H. Takatsu, K. Goto, T. J. Sato, J. W.

Lynn, K. Matsubayashi, Y. Uwatoko, R. Higashinaka, K. Matsuhira, Z. Hiroi and H. Kadowaki, J. Phys. Soc. Jpn. 90,
123705(1-4) (2021).
† Joint research with outside partners.

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4.

*Phase transition in the 5d(1) double perovskite Ba CaReO induced by high magnetic field: H. Ishikawa, D. Hirai, A.
2
6
Ikeda, M. Gen, T. Yajima, A. Matsuo, Y. H. Matsuda, Z. Hiroi and K. Kindo, Phys. Rev. B 104, 174422(7) (2021).

5.

*Pressure-induced phase transition in the J -J square lattice antiferromagnet RbMoOPO Cl: H. Takeda, T. Yamauchi,
1 2
4

6.

†*Quantum antiferromagnet bluebellite comprising a maple-leaf lattice made of spin-1/2 Cu2+ ions: Y. Haraguchi, A.

7.

*Dimensional reduction by geometrical frustration in a cubic antiferromagnet composed of tetrahedral clusters: R.

8.

Modern Alchemy: Making “Plastics” from Paper: Y. Iwamiya, M. Kawai, D. Nishio-Hamane, M. Shibayama and Z.
Hiroi, Ind. Eng. Chem. Res. 60, 355 (2021).

9.

Pyrochlore oxide Hg2Os2O7 on verge of metal–insulator boundary: K. Kataoka, D. Hirai, A. Koda, R. Kadono, T.
Honda and Z. Hiroi, J. Phys.: Condens. Matter 34, 135602 (2022).

M. Takigawa, H. Ishikawa and Z. Hiroi, Phys. Rev. B 103, 104406 (2021).
Matsuo, K. Kindo and Z. Hiroi, Phys. Rev. B 104, 174439(6) (2021).

Okuma, M. Kofu, S. Asai, M. Avdeev, A. Koda, H. Okabe, M. Hiraishi, S. Takeshita, K. M. Kojima, R. Kadono, T.
Masuda, K. Nakajima and Z. Hiroi, Nat. Commun. 12, 4382(1-7) (2021).

10. Dimer Crystallization Induced by Elemental Substitution in the Honeycomb Lattice of Ru 1− x Os x Cl 3: K. Kataoka,
D. Wulferding, T. Yajima, D. Nishio-Hamane, D. Hirai, S. Lee, K.-Y. Choi and Z. Hiroi, J. Phys. Soc. Jpn. 91, 014801(2022).
11. Unusual Resistive Transitions in the Nodal-Line Semimetallic Superconductor NaAlSi: D. Hirai, T. Ikenobe, T. Yamada,
H. Yamane and Z. Hiroi, J. Phys. Soc. Jpn. 91, 024702 (2022).
12. Electronic states of metallic electric toroidal quadrupole order in Cd2Re2O7 determined by combining quantum oscillations and electronic structure calculations: H. T. Hirose, T. Terashima, D. Hirai, Y. Matsubayashi, N. Kikugawa, D. Graf,
K. Sugii, S. Sugiura, Z. Hiroi and S. Uji, Phys. Rev. B 105, 035116 (2022).
13. High-Pressure Synthesis of Transition-Metal Oxyhydrides with Double-Perovskite Structures: T. Yajima, K. Takahashi,
H. Nakajima, T. Honda, K. Ikeda, T. Otomo and Z. Hiroi, Inorg. Chem. 61, 2010 (2022).
14. Surface Functionalization of Non-Woven Fabrics Using a Novel Silica-Resin Coating Technology: Antiviral Treatment
of Non-Woven Fabric Filters in Surgical Masks: C. Tsutsumi-Arai, Y. Iwamiya, R. Hoshino, C. Terada-Ito, S. Sejima,
K. Akutsu-Suyama, M. Shibayama, Z. Hiroi, R. Tokuyama-Toda, R. Iwamiya, K. Ijichi, T. Chiba and K. Satomura,
IJERPH 19, 3639 (2022).

Kawashima group
We developed efficient methods, algorithms, parallelized programs, and sometimes new concepts, based on novel numerical
techniques including the tensor network (TN) method and applied them to relevant physical problems. To list subjects ofour research in 2021, (1) Development of new TN methods [Morita, PRB103][Tu, PRB103], (2) TN study of surface criticalphenomena [Fukusumi, PRB104][Iino, JSP182], (3) Study of TN ground states such as Kitaev spin liquid [Lee, PRB104][Katsura, PRR3], (4) Study of spin liquid in frustrated spin systems [Ogino, PRB103 & PRB104][Kohshiro, PRB104], (5) TN
implementation of rael-space renormalization group [Lyu, PRR3], (6) Development of open-source applications [Motoyama,
CPC264][Hoshi, CPC258], (7) Application of data-scientific techniques to materials science [Harashima, PRM5]
1.

Effective Ruderman–Kittel–Kasuya–Yosida-like Interaction in Diluted Double-exchange Model: Self-learning Monte
Carlo Approach: H. Kohshiro and Y. Nagai, J. Phys. Soc. Jpn. 90, 034711 (2021).

2.

Anisotropy as a diagnostic test for distinct tensor-network wave functions of integer- and half-integer-spin Kitaev
quantum spin liquids: H.-Y. Lee, T. Suzuki, Y. B. Kim and N. Kawashima, Phys. Rev. B 104, 024417(1-13) (2021).

3.

Continuous phase transition between Neel and valence bond solid phases in a J-Q-like spin ladder system: T. Ogino, R.
Kaneko, S. Morita, S. Furukawa and N. Kawashima, Phys. Rev. B 103, 085117 (2021).

4.

Generating function for tensor network diagrammatic summation: W.-L. Tu, H.-K. Wu, N. Schuch, N. Kawashima andJ.-Y. Chen, Phys. Rev. B 103, 205155 (2021).

5.

Global optimization of tensor renormalization group using the corner transfer matrix: S. Morita and N. Kawashima,
Phys. Rev. B 103, 045131(1-6) (2021).

6.

Multiple magnetization plateaus induced by farther neighbor interactions in an S=1 two-leg Heisenberg spin ladder: H.
Kohshiro, R. Kaneko, S. Morita, H. Katsura and N. Kawashima, Phys. Rev. B 104, 214409 (2021).
* Joint research among groups within ISSP.

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7.

Open spin chain realization of a topological defect in a one-dimensional Ising model: Boundary and bulk symmetry: Y.
Fukusumi and S. Iino, Phys. Rev. B 104, 125418 (2021).

8.

Symmetry-protected topological phases and competing orders in a spin-1/2 XXZ ladder with a four-spin interaction: T.
Ogino, S. Furukawa, R. Kaneko, S. Morita and N. Kawashima, Phys. Rev. B 104, 075135 (2021).

9.

†*DSQSS: Discrete Space Quantum Systems Solver: Y. Motoyama, K. Yoshimi, A. Masaki-Kato, T. Kato and N.

Kawashima, Comput. Phys. Commun. 264, 107944(1-9) (2021).

10. †*Kω— Open-source library for the shifted Krylov subspace method of the form (zI-H)x=b: T. Hoshi, M. Kawamura, K.
Yoshimi, Y. Motoyama, T. Misawa, Y. Yamaji, S. Todo, N. Kawashima and T. Sogabe, Computer Physics Communications 258, 107536 (2021).
11. "Data Assimilation Method for Experimental and First-Principles Data: Finite-Temperature Magnetization of(Nd,Pr,La,Ce)2(Fe,Co,Ni)14B": Y. Harashima, K. Tamai, S. Doi, M. Matsumoto, H. Akai, N. Kawashima, M. Ito, N.
Sakuma, A. Kato, T. Shoji and T. Miyake, Phys. Rev. Materials 5, 013806(1-10) (2021).
12. Mott-insulator-like Bose-Einstein condensation in a tight-binding system of interacting bosons with a flat band: H.
Katsura, N. Kawashima, S. Morita, A. Tanaka and H. Tasaki, Phys. Rev. Research 3, 033190 (2021).
13. Scaling dimensions from linearized tensor renormalization group transformations: X. Lyu, R. G. Xu and N. Kawashima,
Phys. Rev. Research 3, 023048 (2021).
14. Boundary CFT and Tensor Network Approach to Surface Critical Phenomena of the Tricritical 3-State Potts model: S.
Iino, J Stat Phys 182, 56 (2021).
15. Energy Scale Deformation on Regular Polyhedra: T. Eguchi, S. Oga, H. Katsura, A. Gendiar and T. Nishino, J. Phys.
Soc. Jpn. 91, 034001 (2022).
16. Universal and non-universal correction terms of Bose gases in dilute region: a quantum Monte Carlo study: A. MasakiKato, Y. Motoyama and N. Kawashima, J. Phys. Soc. Jpn. 90, 034711(1-8) (2022).
17. *Unconventional dual 1D–2D quantum spin liquid revealed by ab initio studies on organic solids family: K. Ido, K.
Yoshimi, T. Misawa and M. Imada, npj Quantum Mater. 7, 48 (2022).
18. Cartesian Operator Factorization Method for Hydrogen: X. Lyu, C. Daniel and J. K. Freericks, Atoms 10, 14 (2022).

Uwatoko group
The transport and optical properties of Ta2NiSe5 have been measured under high pressures up to ~ 9 GPa and present thecomplete phase diagram of the high-pressure semi-metallic phase above Ps ~ 3 GPa. Also, we discovered bulk superconductivity with transition temperature Tsc up to 1.2 K only around Pc, which further justifies the strong electron–lattice coupling.
We study the interplay between CDW and SC in CsV3Sb5 via measurements of resistivity, dc and ac magnetic susceptibility
under various pressures up to 6.6 GPa. The CDW transition decreases with pressure and experiences a subtle modification at
Pc1 ≈ 0.6–0.9 GPa before it vanishes entirely at Pc2 ≈ 2 GPa. We study the electronic and magnetic properties of CrGeTe3 single
crystals by varying pressure up to 11.0 GPa using dc magnetic susceptibility and resistivity measurement. We demonstrate thatpressure can be used as a suitable parameter to control both magnetic and electrical properties of CrGeTe3 by tuning the chargetransfer energy gap between the Te-p valence band and the Cr-eg conduction band. Moreover, the lack of concurrent structuraltransition and spin crossover across the insulator-metal transition (IMT) makes CrGeTe3 a unique vandal van der Waals material
and provides a novel example of bandwidth-controlled IMT. We have systematically investigated superconductivity in Bi single
crystal up to 6.2 GPa. These unusual regular state transport and superconducting properties suggest a possible unconventional
superconductivity scenario for the Bi-III phase. We have investigated the external pressure effect on the resistance and the
ARPES on BiSbTe3. It is observed that with an increase of pressure, resistance decreases and at a value of 8 GPa a sharp drop in
resistance is observed which indicates the occurrence of superconductivity. With further pressure increase, the superconducting
transition temperature (Tc) increases and at 14 GPa it shows the maximum Tc ( ~ 3.3 K). This may indicate that the superconducting transition might be due to the change in the bulk band structure in BiSbTe3. The theoretical study suggests that surface
states remain topologically protected and bulk band structure changes under applied pressure.
1.

Hybridization-Gap Formation and Superconductivity in the Pressure-Induced Semimetallic Phase of the Excitonic
Insulator Ta2NiSe5: K. Matsubayashi, H. Okamura, T. Mizokawa, N. Katayama, A. Nakano, H. Sawa, T. Kaneko, T.
Toriyama, T. Konishi, Y. Ohta, H. Arima, R. Yamanaka, A. Hisada, T. Okada, Y. Ikemoto, T. Moriwaki, K. Munakata, A.
Nakao, M. Nohara, Y. Lu, H. Takagi and Y. Uwatoko, J. Phys. Soc. Jpn. 90, 074706(1-6) (2021).

2.

*Universal Dynamics of Magnetic Monopoles in Two-Dimensional Kagomé Ice: H. Takatsu, K. Goto, T. J. Sato, J. W.

† Joint research with outside partners.

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Lynn, K. Matsubayashi, Y. Uwatoko, R. Higashinaka, K. Matsuhira, Z. Hiroi and H. Kadowaki, J. Phys. Soc. Jpn. 90,
123705(1-4) (2021).
3.

Crystallographic and superconducting properties of filled skutterudite SrOs4P12: Y. Kawamura, S. Deminami, K.
Takeda, T. Kuzuya, L. Salamakha, H. Michor, E. Bauer, J. Gouchi, Y. Uwatoko, T. Kawae and C. Sekine, Phys. Rev. B
103, 085139(1-9) (2021).

4.

Effects of disorder and hydrostatic pressure on charge density wave and superconductivity in 2H-TaS2: S. Xu, J. Gao, Z.
Liu, K. Chen, P. Yang, S. Tian, C. Gong, J. Sun, M. Xue, J. Gouchi, X. Luo, Y. Sun, Y. Uwatoko, H. Lei, B. Wang and J.
Cheng, Phys. Rev. B 103, 224509(1-8) (2021).

5.

High-pressure insulating phase of Mo4O11 with collapsed volume: Z. Y. Liu, P. F. Shan, K. Y. Chen, M. Marshall, S.
Zhang, T. Yong, H. S. Deng, X. Yin, Y. Ding, H. M. Weng, Y. Uwatoko, P. Dera, W. Xie, Y. Sui and J. -G. Cheng, Phys.
Rev. B 104, 024105(1-10) (2021).

6.

†Pressure-induced multicriticality and electronic instability in the quasi-kagome ferromagnet URhSn: A. Maurya, D.

7.

Superconducting phase diagram and the evolution of electronic structure across charge density wave in underdoped
1T-CuδTiSe2 under hydrostatic pressure: S. Xu, P. Yang, K. Chen, Z. Liu, W. Cui, Q. Hu, J. Sun, R. Ang, Y. Uwatoko, B.
Wang and J. Cheng, Phys. Rev. B 104, 134503(1-9) (2021).

8.

Double Superconducting Dome and Triple Enhancement of Tc in the Kagome Superconductor CsV3Sb5 under High
Pressure: K. Chen, N. Wang, Q. Yin, Y. Gu, K. Jiang, Z. Tu, C. Gong, Y. Uwatoko, J. Sun, H. Lei, J. Hu and J. -G.
Cheng, Phys. Rev. Lett. 126, 247001(1-8) (2021).

9.

Nearly Room-Temperature Ferromagnetism in a Pressure-Induced Correlated Metallic State of the van der Waals
Insulator CrGeTe3: D. Bhoi, J. Gouchi, N. Hiraoka, Y. Zhang, N. Ogita, T. Hasegawa, K. Kitagawa, H. Takagi, K. H.
Kim and Y. Uwatoko, Phys. Rev. Lett. 127, 217203(1-7) (2021).

Bhoi, F. Honda, Y. Shimizu, A. Nakamura, Y. J. Sato, D. Li, Y. Homma, M. Sathiskumar, J. Gouchi, Y. Uwatoko and D.
Aoki, Phys. Rev. B 104, 195119(1-5) (2021).

10. Abnormal transport properties of Bi-III superconducting phase in pressurized bismuth single crystal: Y. Zhang, J.
Gouchi, K. Ishigaki, S. Nagasaki, Z. Shi and Y. Uwatoko, Supercond. Sci. Technol. 34, 075009(1-7) (2021).
11. Discovery of Superconductivity in the Quasi-One-Dimensional SrBi2Se4 Single Crystals: Y. Zhang, X. Xing, Y. Meng,
X. Yi, J. Gouchi, D. Bhoi, J. Feng, Y. Fan, W. Zhou, N. Zhou, Y. Uwatoko and Z. Shi, Chem. Mater. 33, 6752-6760(2021).
12. Observation of antiferromagnetic ordering from muon spin resonance study and the Kondo effect in a Dy-doped Bi2Se3
topological insulator: V. K. Gangwar, S. Kumar, M. Singh, P. Singh, L. Ghosh, D. Pal, P. Shahi, Y. Uwatoko, E. F.
Schwier, K. Shimada, D. K. Sharma, S. Kumar and S. Chatterjee, J. Phys. D: Appl. Phys. 54, 455302(1-10) (2021).
13. *Strongly correlated superconductivity in a copper-based metal-organic framework with a perfect kagome lattice:
T. Takenaka, K. Ishihara, M. Roppongi, Y. Miao, Y. Mizukami, T. Makita, J. Tsurumi, S. Watanabe, J. Takeya, M.
Yamashita, K. Torizuka, Y. Uwatoko, T. Sasaki, X. Huang, W. Xu, D. Zhu, N. Su, J. -G. Cheng, T. Shibauchi and K.
Hashimoto, Sci. Adv. 7, eabf3996(1-8) (2021).
14. Pressure Dependence of Superconducting Properties, Pinning Mechanism, and Crystal Structure of theFe0.99Mn0.01Se0.5Te0.5 Superconductor: K. Murugesan, G. Lingannan, K. Ishigaki, Y. Uwatoko, C. Sekine, Y.
Kawamura, H. JunIchi, B. Joseph, P. Vajeeston, P. K. Maheswari, V. P. S. Awana and A. Sonachalam, ACS Omega 6,30419-30431 (2021).
15. †Author Correction: Experimental evidence for the existence of a second partially-ordered phase of ice VI: R. Yamane,
K. Komatsu, J. Gouchi, Y. Uwatoko, S. Machida, T. Hattori, H. Ito and H. Kagi, Nat Commun 12, 1800 (2021).
16. Continuous control of classical-quantum crossover by external high pressure in the coupled chain compound CsCuCl3:
D. Yamamoto, T. Sakurai, R. Okuto, S. Okubo, H. Ohta, H. Tanaka and Y. Uwatoko, Nat Commun 12, 4263(1-9)(2021).
17. †Experimental evidence for the existence of a second partially-ordered phase of ice VI: R. Yamane, K. Komatsu, J.
Gouchi, Y. Uwatoko, S. Machida, T. Hattori, H. Ito and H. Kagi, Nat Commun 12, 1129(1-6) (2021).
18. †High-pressure phase diagrams of FeSe1-xTex: correlation between suppressed nematicity and enhanced superconductivity: K. Mukasa, K. Matsuura, M. Qiu, M. Saito, Y. Sugimura, K. Ishida, M. Otani, Y. Onishi, Y. Mizukami, K. Hashimoto, J. Gouchi, R. Kumai, Y. Uwatoko and T. Shibauchi, Nat Commun 12, 381(1-7) (2021).
19. Defect induced ferromagnetic ordering and room temperature negative magnetoresistance in MoTeP: D. Pal, S. Kumar,* Joint research among groups within ISSP.

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P. Shahi, S. Dan, A. Verma, V. K. Gangwar, M. Singh, S. Chakravarty, Y. Uwatoko, S. Saha, S. Patil and S. Chatterjee,
Sci Rep 11, 9104(1-9) (2021).
20. †Pressure-induced reconstitution of Fermi surfaces and spin fluctuations in S-substituted FeSe: T. Kuwayama, K.
Matsuura, J. Gouchi, Y. Yamakawa, Y. Mizukami, S. Kasahara, Y. Matsuda, T. Shibauchi, H. Kontani, Y. Uwatoko and
N. Fujiwara, Sci Rep 11, 17265(1-7) (2021).
21. Quasi-one-dimensional superconductivity in the pressurized charge-density-wave conductor HfTe3: Z. Y. Liu, J. Li, J. F.
Zhang, J. Li, P. T. Yang, S. Zhang, G. F. Chen, Y. Uwatoko, H. X. Yang, Y. Sui, K. Liu and J. -G. Cheng, npj Quantum
Mater. 6, 90(1-12) (2021).
22. Competition between charge-density-wave and superconductivity in the kagome metal Rb3Sb5: N. N. Wang, K. Y. Chen,
Q. W. Yin, Y. N. N. Ma, B. Y. Pan, X. Yang, X. Y. Ji, S. L. Wu, P. F. Shan, S. X. Xu, Z. J. Tu, C. S. Gong, G. T. Liu, G.
Li, Y. Uwatoko, X. L. Dong, H. C. Lei, J. P. Sun and J. -G. Cheng, Phys. Rev. Research 3, 043018(1-11) (2021).
23. Correlation of magnetocaloric effect through magnetic and electrical resistivity on Si doped Ni–Mn–In Heusler melt
spun ribbon: P. Sivaprakash, S. Arumugam, S. Esakki Muthu, D. M. Raj Kumar, C. Saravanan, N. V. Rama Rao, Y.
Uwatoko and R. Thiyagarajan, Intermetallics 137, 107285(1-8) (2021).
24. Pressure induced superconducting state in ideal topological insulator BiSbTe 3: V. K. Gangwar, S. Kumar, M. Singh, L.
Ghosh, Y. Zhang, P. Shahi, M. Muntwiler, S. Patil, K. Shimada, Y. Uwatoko, J. Sau, M. Kumar and S. Chatterjee, Phys.
Scr. 96, 055802(1-8) (2021).
25. Internal and External Pressure Effects on Superconductivity in FeTexSe1-x(x = 0.46, 0.54) Single Crystals: G.
Lingannan, K. Ganesan, S. Mariappan, R. Sankar, Y. Uwatoko and S. Arumugam, J Supercond Nov Magn 34, 725-731(2021).
26. Abrupt Change in Electronic States under Pressure in New Compound EuPt3 Al5: T. Koizumi, F. Honda, Y. J. Sato, D.
Li, D. Aoki, Y. Haga, J. Gouchi, S. Nagasaki, Y. Uwatoko, Y. Kaneko and Y. Ônuki, J. Phys. Soc. Jpn. 91, 043704(1-5)(2022).
27. †Magnetization of Quaternary Heusler Alloy CoFeCrAl: S. Tsujikawa, I. Shigeta, J. Gouchi, T. Kanomata, R. Y. Umetsu,
Y. Uwatoko and M. Hiroi, IEEE Trans. Magn. 58, 1 (1-5) (2022).
28. †Sub-micrometer particle size effects on metastable phases for a photoswitchable Co–Fe Prussian blue analog: M. Itoi,
I. Maurin, K. Boukheddaden, M. J. Andrus, D. R. Talham, E. Elkaim and Y. Uwatoko, Journal of Applied Physics 131,
085110(1-11) (2022).
29. Pressure-driven superconducting dome in the vicinity of CDW in the pyrite-type superconductor CuS2: L. F. Shi, Z. Y.
Liu, J. Li, X. X. Zhang, N. N. Wang, Q. Cui, K. Y. Chen, Q. Y. Liu, P. T. Yang, J. P. Sun, B. S. Wang, Y. Uwatoko, Y.
Sui, H. X. Yang and J. -G. Cheng, Phys. Rev. Materials 6, 014802(1-8) (2022).
30. Temperature-Pressure Phase Diagram and Possible Pressure-Driven New Electronic Phase in the Polar Metal LiOsO3: J.
-G. Cheng, J. -S. Zhou and Y. Uwatoko, ECS J. Solid State Sci. Technol. 11, 023008(1-4) (2022).

Ozaki group
To discover novel materials having unknown structures, we performed high-throughput calculations for structural exploration
based on computational methods such as density functional theory (DFT) in two directions. One is to find densest binary andternary sphere packing structures (DBSPs, DTSPs). The other is to find two dimensional compounds consisting of AB2 composition. As the first issue, we addressed the DBSPs and DTSPs under periodic boundary conditions and present phase diagrams,
including newly found 12 and 59 putative densest structures, respectively. To efficiently explore the DBSPs and DTSPs, wedeveloped an unbiased random search approach based on both the piling-up method to generate initial structures in an unbiased
way and the iterative balance method to optimize the volume of a unit cell while keeping the overlap of hard spheres minimized.
It turned out that many of DBSPs and DTSPs correspond to real crystals, suggesting that the diverse structures of DBSPs and
DTSPs can be effectively used as structural prototypes for searching ternary and quaternary crystal structures. As the second
issue, we constructed a structure map for AB2 type monolayers of 3844 compounds which are all the combinations of 62
elements selected from the periodic table. The structure map and its web version (http://www.openmx-square.org/2d-ab2/),
which are obtained by symmetry-unconstrained geometry optimizations starting from ferromagnetic 1T, 1H and planar structures as the initial states, provide comprehensive structural trends of the 3844 compounds in two dimensional (2D) structuresand correctly predict the structures of most of the existing 2D compounds such as transition metal dichalcogenides and MXenes
having 1T or 1H type structures. Our structure map and database will promote efforts towards the synthesis of undiscovered 2D
materials experimentally and investigating the properties of new structures theoretically.

† Joint research with outside partners.

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1.

Methods for constructing parameter-dependent flat-band lattices: T. Ogata, M. Kawamura and T. Ozaki, Phys. Rev. B
103, 205119 (2021).

2.

Scaling law for Rashba-type spin splitting in quantum-well films: R. Noguchi, K. Kuroda, M. Kawamura, K. Yaji, A.
Harasawa, T. Iimori, S. Shin, F. Komori and T. Ozaki, Phys. Rev. B 104, L180409 (2021).

3.

The hidden competing phase revealed by first-principles calculations of phonon instability in the nearly optimally doped
cuprate La1.875Sr0.125CuO4: C.-C. Lee, J.-Y. Chiu, Y. Yamada-Takamura and T. Ozaki, Phys. Rev. B 104, 064114(2021).

4.

Densest ternary sphere packings: R. Koshoji and T. Ozaki, Phys. Rev. E 104, 024101 (2021).

5.

Diverse densest binary sphere packings and phase diagram: R. Koshoji, M. Kawamura, M. Fukuda and T. Ozaki, Phys.
Rev. E 103, 023307 (2021).

6.

†*Kω— Open-source library for the shifted Krylov subspace method of the form (zI-H)x=b: T. Hoshi, M. Kawamura, K.

7.

†*RESPACK: An ab initio tool for derivation of effective low-energy model of material: K. Nakamura, Y. Yoshimoto, Y.

8.

Structure of one-dimensional monolayer Si nanoribbons on Ag(111): L. Feng, A. Shiotari, K. Yabuoshi, M. Fukuda, T.
Ozaki and Y. Sugimoto, Phys. Rev. Materials 5, 034002 (2021).

9.

Voltage-controlled magnetic anisotropy in antiferromagnetic MgO-capped MnPt films: P. -H. Chang, W. Fang, T. Ozaki
and K. D. Belashchenko, Phys. Rev. Materials 5, 054406 (2021).

Yoshimi, Y. Motoyama, T. Misawa, Y. Yamaji, S. Todo, N. Kawashima and T. Sogabe, Computer Physics Communications 258, 107536 (2021).
Nomura, T. Tadano, M. Kawamura, T. Kosugi, K. Yoshimi, T. Misawa and Y. Motoyama, Computer Physics Communications 261, 107781 (2021).

10. *The Simplest Model for Doped Poly(3,4-ethylenedioxythiophene) (PEDOT): Single-crystalline EDOT Dimer Radical
Cation Salts: R. Kameyama, T. Fujino, S. Dekura, M. Kawamura, T. Ozaki and H. Mori, Chem. Eur. J. 27, 6696 (2021).
11. †*DCore: Integrated DMFT software for correlated electrons: H. Shinaoka, J. Otsuki, M. Kawamura, N. Takemori andK. Yoshimi, SciPost Phys. 10, 117 (2021).
12. A structure map for AB2 type 2D materials using high-throughput DFT calculations: M. Fukuda, J. Zhang, Y. -T. Lee
and T. Ozaki, Mater. Adv. 2, 4392-4413 (2021).

Noguchi group
We have studied (1) reaction-diffusion waves on a deformable vesicle, (2) binding of isotropic curvature-inducing proteins onto
membranes, (3) non-thermal fluctuations of membrane pushed by filament growth, (4) cavitation in Karman vortex of polymer
solution, (5) fracture dynamics of polymer material, and (6) dynamics of water molecules on lipid membrane.
1.

†Effects of polymers on the cavitating flow around a cylinder: A large-scale molecular dynamics analysis: Y. Asano, H.

2.

Coarse-grained molecular dynamics simulations of void generation and growth processes in the fracture of the lamellar
structure of polyethylene: Y. Higuchi, Phys. Rev. E 103, 042502 (2021).

3.

Vesicle budding induced by binding of curvature-inducing proteins: H. Noguchi, Phys. Rev. E 104, 014410 (2021).

4.

Rotational Dynamics of Water at the Phospholipid Bilayer Depending on the Head Groups Studied by Molecular
Dynamics Simulations: Y. Higuchi, Y. Asano, T. Kuwahara and M. Hishida, Langmuir 37, 5329 (2021).

5.

Three-Phase Coexistence in Binary Charged Lipid Membranes in a Hypotonic Solution: J. Guo, H. Ito, Y. Higuchi, K.
Bohinc, N. Shimokawa and M. Takagi, Langmuir 37, 9683 (2021).

6.

Binding of curvature-inducing proteins onto tethered vesicles: H. Noguchi, Soft Matter 17, 10469-10478 (2021).

7.

Binding of thermalized and active membrane curvature-inducing proteins: Q. Goutaland, F. van Wijland, J.-B. Fournierand H. Noguchi, Soft Matter 17, 5560-5573 (2021).

8.

Reaction-diffusion waves coupled with membrane curvature: N. Tamemoto and H. Noguchi, Soft Matter 17, 6589-6596(2021).

Watanabe and H. Noguchi, J. Chem. Phys. 155, 014905 (2021).

* Joint research among groups within ISSP.

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9.

Undulation of a moving fluid membrane pushed by filament growth: H. Noguchi and O. Pierre-Louis, Sci Rep 11, 7985
(2021).

10. 荷電脂質膜の秩序形成：実験と粗視化分子動力学シミュレーションの融合 : 下川 直史 , 伊藤 弘明 , 樋口 祐次 , 分子シミュ
レーション学会誌「アンサンブル」23, 253-259 (2021).
11. Hydrophobic immiscibility controls self-sorting or co-assembly of peptide amphiphiles: R. Wakabayashi, R. Imatani, M.
Katsuya, Y. Higuchi, H. Noguchi, N. Kamiya and M. Goto, Chem. Commun. 58, 585 (2022).
12. Anisotropic, Degradable Polymer Assemblies Driven by a Rigid Hydrogen-Bonding Motif That Induce Shape-Specific
Cell Responses: K. Fukushima, K. Matsuzaki, M. Oji, Y. Higuchi, G. Watanabe, Y. Suzuki, M. Kikuchi, N. Fujimura, N.
Shimokawa, H. Ito, T. Kato, S. Kawaguchi and M. Tanaka, Macromolecules 55, 15 (2022).
13. Nonequilibrium dynamics of a fluid vesicle: Turing patterns and traveling waves: H. Noguchi and N. Tamemoto, J.
Phys.: Conf. Ser. 2207, 012017 (2022).
14. †Binding of anisotropic curvature-inducing proteins onto membrane tubes: H. Noguchi, C. Tozzi and M. Arroyo, Soft
Matter 18, 3384--3394 (2022).

Yoshimi group
We have developed and enhanced the usability of programs adopted in the project for advancement of software usability inmaterials science (PASUMS). Our group's activity of 2021 include functional and usability enhancement of (1) 2DMAT and (2)RISM. We published four papers about the developed software packages (DCore, DSQSS, Kω, and RESPACK) in PASUMS. In
addition, using these software packages, we have studied electronic properties of organic conductors β'-[Pd(dmit)2]2 and relaxation phenomena observed in quantum dot system. We also published the paper about the improvement of an analytic continuation method by combining sparse modeling with Pade approximation.
1.

†Multiple-magnon excitations shape the spin spectrum of cuprate parent compounds: D. Betto, R. Fumagalli, L. Marti-

2.

*Preparation and Readout of Multielectron High-Spin States in a Gate-Defined GaAs/AlGaAs Quantum Dot: H.

3.

†*DSQSS: Discrete Space Quantum Systems Solver: Y. Motoyama, K. Yoshimi, A. Masaki-Kato, T. Kato and N.

4.

†*Kω— Open-source library for the shifted Krylov subspace method of the form (zI-H)x=b: T. Hoshi, M. Kawamura, K.

5.

†*RESPACK: An ab initio tool for derivation of effective low-energy model of material: K. Nakamura, Y. Yoshimoto, Y.

6.

Ab initio derivation and exact diagonalization analysis of low-energy effective Hamiltonians for β′−[Pd(dmit)2]2: K.
Yoshimi, T. Tsumuraya and T. Misawa, Phys. Rev. Research 3, 043224 (2021).

7.

†*DCore: Integrated DMFT software for correlated electrons: H. Shinaoka, J. Otsuki, M. Kawamura, N. Takemori and8.

Robust analytic continuation combining the advantages of the sparse modeling approach and the Padé approximation: Y.
Motoyama, K. Yoshimi and J. Otsuki, Phys. Rev. B 105, 035139 (2022).

9.

*Unconventional dual 1D–2D quantum spin liquid revealed by ab initio studies on organic solids family: K. Ido, K.

nelli, M. Rossi, R. Piombo, K. Yoshimi, D. D. Castro, E. D. Gennaro, A. Sambri, D. Bonn, G. A. Sawatzky, L. Braicovich, N. B. Brookes, J. Lorenzana and G. Ghiringhelli, Phys. Rev. B 103, L140409 (2021).
Kiyama, K. Yoshimi, T. Kato, T. Nakajima, A. Oiwa and S. Tarucha, Phys. Rev. Lett. 127, 086802(1-6) (2021).
Kawashima, Comput. Phys. Commun. 264, 107944(1-9) (2021).

Yoshimi, Y. Motoyama, T. Misawa, Y. Yamaji, S. Todo, N. Kawashima and T. Sogabe, Computer Physics Communications 258, 107536 (2021).
Nomura, T. Tadano, M. Kawamura, T. Kosugi, K. Yoshimi, T. Misawa and Y. Motoyama, Computer Physics Communications 261, 107781 (2021).

K. Yoshimi, SciPost Phys. 10, 117 (2021).

Yoshimi, T. Misawa and M. Imada, npj Quantum Mater. 7, 48 (2022).

Neutron Science Laboratory
Yamamuro group† Joint research with outside partners.

ISSP Activity Report 2021

87

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.
Following the vapor-deposited (VD) CS2 and CCl4 glasses, which were measured in 2018 and 2020, the inelastic neutron
scattering (INS) experiment of VD H2O glass (amorphous ice) was performed using AMATERAS in J-PARC MLF. By
combining these three INS data , we have found a general relation between the low-energy excitations and local structuresof glasses. The boson peak appears independently of the local structure, while the dispersive phonon excitations adjacentto the boson peak strongly depends on quasi-network structures of glasses (network formation degree: H2O > CCl4 > CS2).
The neutron diffraction (ND) of a novel hydrogen-cluster material Li5MoD11 was measured on NOVA in J-PARC MLF. The
Rietveld and pair distribution function (PDF) analyses revealed that the MoD9 cluster is orientationally disordered down to
10 K, being consistent with the previous quasielastic neutron scattering (QENS) experiments. A ND work on amorphous D2
deuterate was conducted on NOVA. The corresponding QENS work on amorphous H2 hydrate was also performed using DNA
and AGNES in JRR-3 which was restarted in 2021 after the long shutdown due to the Great East-Japan Earthquake in 2011.
Other than these neutron works, the synchrotron-radiation X-ray diffraction works of toluene and glycerol liquids were carriedout at high pressure up 4 GPa and room temperature using a Paris-Edinburgh cell and BL37XU at SPring-8. At higher pressures,
we found drastic development in intermolecular correlation for toluene and more compact intramolecular structure keepinghydrogen bonds for glycerol.
1.

Quasielastic Neutron Scattering Study on Polymorphism of Glycerol Deuterated Triacylglycerols: Comparison with
Saturated, Trans-unsaturated and Cis-unsaturated Triacylglycerols: C. Takechi, T. Kawaguchi, F. Kaneko and O.
Yamamuro, Chem. Lett. 50, 435 (2021).

2.

Spin glass behavior and magnetic boson peak in a structural glass of a magnetic ionic liquid: M. Kofu, R. Watanuki, T.
Sakakibara, S. Ohira-Kawamura, K. Nakajima, M. Matsuura, T. Ueki, K. Akutsu and O. Yamamuro, Sci. Rep. 11, 12098(2021).

3.

Quasielastic neutron scattering study on proton dynamics assisted by water and ammonia molecules confined in
MIL-53: S. Miyatsu, M. Kofu, A. Shigematsu, T. Yamada, H. Kitagawa, W. Lohstroh, G. Simeoni, M. Tyagi and O.
Yamamuro, Structural Dynamics 8, 054501 (2021).

4.

Intermolecular correlations of liquid and glassy CS 2 studied by synchrotron radiation x-ray diffraction: Y. Mizuno, Y.
Zhao, H. Akiba, S. Kohara, K. Ohara, M. G. Tucker, M. T. McDonnell and O. Yamamuro, J. Chem. Phys. 156, 034503(2022).

5.

Structure of water-in-salt and water-in-bisalt electrolytes: M. A. González, H. Akiba, O. Borodin, G. J. Cuello, L.
Hennet, S. Kohara, E. J. Maginn, L. Mangin-Thro, O. Yamamuro, Y. Zhang, D. L. Price and M. -L. Saboungi, Phys.
Chem. Chem. Phys. 24, 10727-10736 (2022).

6.

熱測定・中性子散乱による液晶性イオン液体のナノ構造とダイナミクス研究 : 根本 文也 , 古府 麻衣子 , 山室 修 , 日本液晶学会誌 25(4), 230-236 (2021).

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; Nontrivial temperature dependence of magnetic anisotropy in multiferroic Ba2MnGe2O7,magnetic
diffuse scattering of YBaCo4O7 and LuBaCo4O7 on Kagome and triangular lattices, crystalline electric field level scheme ofnon-centrosymmetric CeRhSi3 and CeIrSi3, etc.
1.

Antiferromagnetic Kitaev interaction in Jeff = 1/2 cobalt honeycomb materials Na3Co2SbO6 and Na2Co2TeO6: C. Kim,
J. Jeong, G. Lin, P. Park, T. Masuda, S. Asai, S. Itoh, H.-S. Kim, H. Zhou, J. Ma and J.-G. Park, J. Phys.: Condens.
Matter 34, 045802(1-11) (2021).

2.

Complex Magnetic Phase Diagram in the Non-Centrosymmetric Compound CePtSi3: D. Ueta, M. Yoshida, T. Kobuke,
Y. Ikeda, T. Masuda and H. Yoshizawa, J. Phys. Soc. Jpn. 90, 064712(1-4) (2021).

3.

Crystalline Electric Field Level Scheme of Non-centrosymmetric CeRhSi3 and CeIrSi3: D. Ueta, T. Kobuke, H. Shibata,
M. Yoshida, Y. Ikeda, S. Itoh, T. Yokoo, T. Masuda and H. Yoshizawa, J. Phys. Soc. Jpn. 90, 104706(1-7) (2021).

4.

Magnetic Diffuse Scattering of YBaCo4O7 and LuBaCo4O7 on Kagome and Triangular Lattices: M. Soda, K. Morita,
G. Ehlers, F. Ye, T. Tohyama, H. Yoshizawa, T. Masuda and H. Kawano-Furukawa, J. Phys. Soc. Jpn. 90, 074704(1-5)(2021).

5.

Oval-cycloidal Magnetic Structure with Phase-shift in the Non-centrosymmetric Tetragonal Compound CePdSi3: D.
Ueta, M. Yoshida, T. Kobuke, Y. Ikeda, A. Nakao, T. Moyoshi, K. Munakata, Y. Liu, T. Masuda and H. Yoshizawa, J.
* Joint research among groups within ISSP.

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Phys. Soc. Jpn. 90, 114702(1-5) (2021).
6.

†*Spin-gap formation due to spin-Peierls instability in π-orbital-ordered NaO : M. Miyajima, F. Astuti, T. Fukuda, M.
2

7.

†*Coexistence of Magnetoelectric and Antiferroelectric-like Orders in Mn Ta O : K. Kimura, N. Yagi, S. Hasegawa, M.
3 2 8

8.

Topological Analysis of the Experimental Electron Density in Multiferroic Antiferromagnet Ba2MnGe2O7: R. Dutta, H.
Thoma, D. Chernyshov, B. Nafradi, T. Masuda, A. Kriele and V. Hutanu, IEEE Trans. Magn. 58, 2500206(1-6) (2021).

9.

*Dimensional reduction by geometrical frustration in a cubic antiferromagnet composed of tetrahedral clusters: R.

Kodani, S. Iida, S. Asai, A. Matsuo, T. Masuda, K. Kindo, T. Hasegawa, T. C. Kobayashi, T. Nakano, I. Watanabe and T.
Kambe, Phys. Rev. B 104, L140402(5) (2021).
Hagihala, A. Miyake, M. Tokunaga, H. Cao, T. Masuda and T. Kimura, Inorg. Chem. 60, 15078(1-7) (2021).

Okuma, M. Kofu, S. Asai, M. Avdeev, A. Koda, H. Okabe, M. Hiraishi, S. Takeshita, K. M. Kojima, R. Kadono, T.
Masuda, K. Nakajima and Z. Hiroi, Nat. Commun. 12, 4382(1-7) (2021).

10. Dynamical Studies in Condensed Matter on High Resolution Chopper Spectrometer (HRC) —2nd Phase of HRC
Project—: S. Itoh, T. Masuda, T. Yokoo, H. Yoshizawa, M. Soda, S. Asai, Y. Ikeda, S. Ibuka, M. Yoshida, T. Hawai, H.
Saito, D. Kawana, R. Sugiura, T. Asami and Y. Ihata, JPS Conf. Proc. 33, 011058(1-7) (2021).
11. Field-induced quantum spin disordered state in spin-1/2 honeycomb magnet Na2Co2TeO6: G. Lin, J. Jeong, C. Kim,
Y. Wang, Q. Huang, T. Masuda, S. Asai, S. Itoh, G. Günther, M. Russina, Z. Lu, J. Sheng, L. Wang, J. Wang, G. Wang,
Q. Ren, C. Xi, W. Tong, L. Ling, Z. Liu, L. Wu, J. Mei, Z. Qu, H. Zhou, X. Wang, J.-G. Park, Y. Wan and J. Ma, Nat
Commun 12, 5559(1-8) (2021).
12. Triplon current generation in solids: Y. Chen, M. Sato, Y. Tang, Y. Shiomi, K. Oyanagi, T. Masuda, Y. Nambu, M. Fujita
and E. Saitoh, Nat Commun 12, 5199(1-7) (2021).
13. Nontrivial temperature dependence of magnetic anisotropy in multiferroic Ba2MnGe2O7: S. Hasegawa, S. Hayashida, S.
Asai, M. Matsuura, Z. Igor and T. Masuda, Phys. Rev. Research 3, L032023(1-5) (2021).
14. Hybridized excitation of Higgs-amplitude and phase modes in frustrated quantum magnet: T. Masuda, S. Hayashida and
M. Matsumoto, 日本物理学会誌 76, 23-27 (2021).
15. Novel Route for Analysis on Neutron Scattering Spectra: T. Masuda, JPSJ News Comments 18, 03 (2021).

Nakajima group
Nakajima group has been studying magnetic materials showing cross-correlated phenomena related to topologically-nontrivial
magnetic structures by means of neutron and X-ray scattering techniques. We are also responsible for a polarized-neutron
triple-axis neutron spectrometer PONTA in the research reactor JRR-3 in Tokai. In this year, JRR-3 restarted its operation after
the long shutdown since the east Japan great earthquake in 2011. We have updated components of the spectrometer and havesupported the users who applied the joint-use user program of ISSP-NSL. One of the successful studies with the external users
is the identification of complex magnetic orders in a centrosymmetric skyrmion host EuAl4. Polarized neutron scattering at
PONTA contributed to reveal successive magnetic phase transitions in this system at low temperatures in zero magnetic field.
We are also collaborating with Kohama group in the international mega gauss laboratory in ISSP. By combining a long-pulse
magnet developed by Kohama group with a pulsed neutron beam in J-PARC, we successfully performed time-of-flight neutron
Laue diffraction measurements in long-pulse magnetic fields up to 14 T. We are planning to extend the limit of the magnetic
field to 20-30 T in the future.
1.

Direct Observation of Cycloidal Spin Modulation and Field-induced Transition in Néel-type Skyrmion-hosting
VOSe2O5: T. Kurumaji, T. Nakajima, A. Feoktystov, E. Babcock, Z. Salhi, V. Ukleev, T.-H. Arima, K. Kakurai and Y.
Tokura, J. Phys. Soc. Jpn. 90, 024705 (2021).

2.

Robust noncoplanar magnetism in band-filling-tuned (Nd1-xCax)2Mo2O7: M. Hirschberger, Y. Kaneko, L. Spitz, T.
Nakajima, Y. Taguchi and Y. Tokura, Phys. Rev. B 104, 024436 (2021).

3.

Phase correction method in a wide detector plane for MIEZE spectroscopy with pulsed neutron beams: T. Oda, H. Endo,
H. Ohshita, T. Seya, Y. Yasu, T. Nakajima, M. Hino and Y. Kawabata, Nuclear Instruments and Methods in Physics
Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 1012, 165616 (2021).

4.

†*Above-ordering-temperaturelarge anomalous Hall effect in a triangular-lattice magnetic semiconductor: M.
Uchida, S. Sato, H. Ishizuka, R. Kurihara, T. Nakajima, Y. Nakazawa, M. Ohno, M. Kriener, A. Miyake, K. Ohishi,
T. Morikawa, M. S. Bahramy, T.-H. Arima, M. Tokunaga, N. Nagaosa and M. Kawasaki, Sci. Adv. 7, eabl5381(1-8)† Joint research with outside partners.

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89

(2021).
5.

Emergence of spin-orbit coupled ferromagnetic surface state derived from Zak phase in a nonmagnetic insulator FeSi: Y.
Ohtsuka, N. Kanazawa, M. Hirayama, A. Matsui, T. Nomoto, R. Arita, T. Nakajima, T. Hanashima, V. Ukleev, H. Aoki,
M. Mogi, K. Fujiwara, A. Tsukazaki, M. Ichikawa, M. Kawasaki and Y. Tokura, Sci. Adv. 7, eabj0498 (2021).

6.

Square and rhombic lattices of magnetic skyrmions in a centrosymmetric binary compound: R. Takagi, N. Matsuyama,
V. Ukleev, L. Yu, J. S. White, S. Francoual, J. R. L. Mardegan, S. Hayami, H. Saito, K. Kaneko, K. Ohishi, Y. Onuki,
T.-H. Arima, Y. Tokura, T. Nakajima and S. Seki, Nat Commun 13, 1472 (2022).

7.

Zoology of Multiple-Q Spin Textures in a Centrosymmetric Tetragonal Magnet with Itinerant Electrons: N. D. Khanh,
T. Nakajima, S. Hayami, S. Gao, Y. Yamasaki, H. Sagayama, H. Nakao, R. Takagi, Y. Motome, Y. Tokura, T. Arima and
S. Seki, Advanced Science 9, 2105452 (2022).

Mayumi group
Mayumi group has discovered that slide-ring gels, in which polymer chains are cross-linked by ring molecules, show reversible strain-induced crystallization of polymer chains in loading/unloading process, which realizes their remarkable mechanicaltoughness and high recoverability under repeated cyclic deformation. The formation process of strain-induced crystalline structure has been probed by time-resolved scattering technique.
1.

Tough hydrogels with rapid self-reinforcement: C. Liu, N. Morimoto, L. Jiang, S. Kawahara, T. Noritomi, H.
Yokoyama, K. Mayumi and K. Ito, Science 372, 1078 (2021).

2.

Softness, Elasticity, and Toughness of Polymer Networks with Slide-Ring Cross-Links: K. Mayumi, C. Liu, Y. Yasuda
and K. Ito, Gels 7, 91 (2021).

3.

Overscreening Induced by Ionic Adsorption at the Ionic Liquid/Electrode Interface Detected Using Neutron Reflectometry with a Rational Material Design: N. Nishi, J. Uchiyashiki, T. Oda, M. Hino and N. L. Yamada, Bulletin of the
Chemical Society of Japan 94, 2914-2918 (2021).

4.

Tri-branched gels: Rubbery materials with the lowest branching factor approach the ideal elastic limit: T. Fujiyabu, N.
Sakumichi, T. Katashima, C. Liu, K. Mayumi, U.-I. Chung and T. Sakai, Science Advances 8, eabk0010 (2022).

International MegaGauss Science Laboratory
Kindo group
We have found better approach to produce the Cu-Ag wire for the pulsed magnet. We can not tell the better wire from good one
by comparing tensile strength or conductivity but only by generating field. Good Cu-Ag wire can generate 75 Tesla(T) field
without destruction but better one can 85 T. The wire produced by better approach generated the highest field up to 86.1 T in
this year.
1.

*High-field phase diagram of Ni V O studied by specific heat and magnetocaloric effect measurements: C. Dong, Y.
3 2 8

2.

Ligand dependent magnetism of the J = 3/2 Mott insulator Cs2MX6 (M = Ta, Nb, X = Br, Cl): H. Ishikawa, T. Yajima,
A. Matsuo and K. Kindo, J. Phys.: Condens. Matter 33, 125802(1-6) (2021).

3.

GdV6Sn6: A Multi-carrier Metal with Non-magnetic 3d-electron Kagome Bands and 4f-electron Magnetism: H.
Ishikawa, T. Yajima, M. Kawamura, H. Mitamura and K. Kindo, J. Phys. Soc. Jpn. 90, 124704(4) (2021).

4.

Magnetization Process in EuCo2P2 and EuT2Ge2 (T: transition metal): Comparison of Experiment and Theory: T.
Takeuchi, T. Tahara, T. Kida, Y. Narumi, M. Hagiwara, K. Kindo, W. Iha, Y. Ashitomi, T. Yara, M. Nakashima, Y.
Amako, M. Hedo, T. Nakama and Y. Onuki, J. Phys. Soc. Jpn. 90, 034709(1-15) (2021).

5.

†*Spin Excitations of the S = 1/2 One-Dimensional Ising-Like Antiferromagnet BaCo V O in Transverse Magnetic
2 2 8

Kohama, Z. Z. He, X. T. Han, K. Sato, A. Matsuo, K. Kindo, M. Yang and J. F. Wang, J. Phys.: Condens. Matter 33,
205402 (2021).

Fields: A. Okutani, H. Onishi, S. Kimura, T. Takeuchi, T. Kida, M. Mori, A. Miyake, M. Tokunaga, K. Kindo and M.
Hagiwara, J. Phys. Soc. Jpn. 90, 044704(1-9) (2021).
* Joint research among groups within ISSP.

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6.

Experimental determination of the magnetic interactions of frustrated Cairo pentagon lattice materials: M. D. Le, E. M.
Wheeler, J. Jeong, K. Ramesh Kumar, S. Lee, C.-H. Lee, M. J. Oh, Y.-J. Jo, A. Kondo, K. Kindo, U. Stuhr, B. Fåk, M.
Enderle, D. Batuk, A. M. Abakumov, A. A. Tsirlin and J.-G. Park, Phys. Rev. B 103, 104423 (2021).

7.

*Ferroelectric polarization reversal in multiferroic MnWO via a rotating magnetic field up to 52 T: J. F. Wang, W. X.
4

8.

†*Geometrical Hall effect and momentum-space Berry curvature from spin-reversed band pairs: M. Hirschberger, Y.

9.

†High magnetic field properties in Ru
2−xFexCrSi with antiferromagnetic and spin-glass states: M. Hiroi, S. Nishiinoue,

Liu, Z. Z. He, C. B. Liu, M. Tokunaga, M. Li, C. Dong, X. T. Han, F. Herlach, C. L. Lu, Z. W. Ouyang, Z. C. Xia, K.
Kindo, L. Li and M. Yang, Phys. Rev. B 104, 014415 (2021).
Nomura, H. Mitamura, A. Miyake, T. Koretsune, Y. Kaneko, L. Spitz, Y. Taguchi, A. Matsuo, K. Kindo, R. Arita, M.
Tokunaga and Y. Tokura, Phys. Rev. B 103, L041111(1-6) (2021).
I. Shigeta, M. Ito, K. Koyama, A. Kondo, K. Kindo, I. Watanabe, M. Fujii, S. Kimura, H. Manaka and N. Terada, Phys.
Rev. B 103, 094428 (2021).

10. *Normal state specific heat in the cuprate superconductors La2−xSrxCuO4 and Bi2+ySr2−x−yLaxCuO6+δ near the criticalpoint of the pseudogap phase: C. Girod, D. LeBoeuf, A. Demuer, G. Seyfarth, S. Imajo, K. Kindo, Y. Kohama, M.
Lizaire, A. Legros, A. Gourgout, H. Takagi, T. Kurosawa, M. Oda, N. Momono, J. Chang, S. Ono, G. -q. Zheng, C.
Marcenat, L. Taillefer and T. Klein, Phys. Rev. B 103, 214506 (2021).
11. *Phase transition in the 5d(1) double perovskite Ba2CaReO6 induced by high magnetic field: H. Ishikawa, D. Hirai, A.
Ikeda, M. Gen, T. Yajima, A. Matsuo, Y. H. Matsuda, Z. Hiroi and K. Kindo, Phys. Rev. B 104, 174422(7) (2021).
12. †*Physical properties of liquid oxygen under ultrahigh magnetic fields: T. Nomura, A. Ikeda, M. Gen, A. Matsuo,
K. Kindo, Y. Kohama, Y. H. Matsuda, S. Zherlitsyn, J. Wosnitza, H. Tsuda and T. C. Kobayashi, Phys. Rev. B 104,
224423(10) (2021).
13. †*Quantum antiferromagnet bluebellite comprising a maple-leaf lattice made of spin-1/2 Cu2+ ions: Y. Haraguchi, A.
Matsuo, K. Kindo and Z. Hiroi, Phys. Rev. B 104, 174439(6) (2021).
14. *Quantum transport of topological spin solitons in a one-dimensional organic ferroelectric: S. Imajo, A. Miyake, R.
Kurihara, M. Tokunaga, K. Kindo, S. Horiuchi and F. Kagawa, Phys. Rev. B 103, L201117 (2021).
15. †*Spin-gap formation due to spin-Peierls instability in π-orbital-ordered NaO2: M. Miyajima, F. Astuti, T. Fukuda, M.
Kodani, S. Iida, S. Asai, A. Matsuo, T. Masuda, K. Kindo, T. Hasegawa, T. C. Kobayashi, T. Nakano, I. Watanabe and T.
Kambe, Phys. Rev. B 104, L140402(5) (2021).
16. Symmetry change of d-wave superconductivity in κ-type organic superconductors: S. Imajo, K. Kindo and Y.
Nakazawa, Phys. Rev. B 103, L060508(1-5) (2021).
17. Thermodynamic evidence for the formation of a Fulde-Ferrell-Larkin-Ovchinnikov phase in the organic superconductorλ−(BETS)2GaCl4: S. Imajo, T. Kobayashi, A. Kawamoto, K. Kindo and Y. Nakazawa, Phys. Rev. B 103, L220501(2021).
18. The FFLO State in the Dimer Mott Organic Superconductor κ-(BEDT-TTF)2Cu[N(CN)2]Br: S. Imajo and K. Kindo,
Crystals 11, 1358(11) (2021).
19. Ni deficiency effects on martensitic phase transition in Ni2MnGa: M. Ito, S. Kuwahara, A. Taira, H. Matsuguma, A.
Kondo and K. Kindo, Physica B: Condensed Matter 611, 412794 (2021).
20. *Compact megajoule-class pulsed power supply for generating long-pulsed magnetic fields: K. Matsui, T. Kanda, Y.
Ihara, K. Kindo and Y. Kohama, Review of Scientific Instruments 92, 024711 (2021).
21. *High-resolution calorimetry in pulsed magnetic fields: S. Imajo, C. Dong, A. Matsuo, K. Kindo and Y. Kohama,
Review of Scientific Instruments 92, 043901 (2021).
22. †*Nuclear magnetic resonance measurements in dynamically controlled field pulse: Y. Ihara, K. Hayashi, T. Kanda, K.
Matsui, K. Kindo and Y. Kohama, Review of Scientific Instruments 92, 114709(8) (2021).
23. *Extraordinary π-electron superconductivity emerging from a quantum spin liquid: S. Imajo, S. Sugiura, H. Akutsu, Y.
Kohama, T. Isono, T. Terashima, K. Kindo, S. Uji and Y. Nakazawa, Phys. Rev. Research 3, 033026 (2021).
24. *Revealing three-dimensional quantum criticality by Sr substitution in Han purple: S. Allenspach, P. Puphal, J. Link,
I. Heinmaa, E. Pomjakushina, C. Krellner, J. Lass, G. S. Tucker, C. Niedermayer, S. Imajo, Y. Kohama, K. Kindo, S.
Kramer, M. Horvatic, M. Jaime, A. Madsen, A. Mira, N. Laflorencie, F. Mila, B. Normand, C. Ruegg, R. Stern and F.
Weickert, Phys. Rev. Research 3, 023177 (2021).
† Joint research with outside partners.

ISSP Activity Report 2021

91

25. †*Nature of field-induced antiferromagnetic order in Zn-doped CeCoIn5 and its connection to quantum criticality inthe pure compound: M. Yokoyama, Y. Honma, Y. Oshima, ?. Rahmanto, K. Suzuki, K. Tenya, Y. Shimizu, D. Aoki, A.
Matsuo, K. Kindo, S. Nakamura, Y. Kono, S. Kittaka and T. Sakakibara, Phys. Rev. B 105, 054515(9) (2022).
26. Optical selection rules of the magnetic excitation in the S=1/2 one-dimensional Ising-like antiferromagnet BaCo2V2O8:
S. Kimura, H. Onishi, A. Okutani, M. Akaki, Y. Narumi, M. Hagiwara, K. Okunishi, K. Kindo, Z. He, T. Taniyama and
M. Itoh, Phys. Rev. B 105, 014417(9) (2022).
27. Reentrant ferroelectric phase induced by a tilting high magnetic field in Ni3V2O8: C. Dong, J. F. Wang, Z. Z. He, Y.
T. Chang, M. Y. Shi, Y. R. Song, S. M. Jin, Y. Q. Du, Z. Y. Wu, X. T. Han, K. Kindo and M. Yang, Phys. Rev. B 105,
024427(6) (2022).
28. †Revised phase diagram of the high-Tc cuprate superconductor Pb-doped Bi2Sr2CaCu2O8+δ revealed by anisotropictransport measurements: K. Harada, Y. Teramoto, T. Usui, K. Itaka, T. Fujii, T. Noji, H. Taniguchi, M. Matsukawa, H.
Ishikawa, K. Kindo, D. S. Dessau and T. Watanabe, Phys. Rev. B 105, 085131(9) (2022).
29. †Quantum paramagnetism in the hyperhoneycomb Kitaev magnet β−ZnIrO3: Y. Haraguchi, A. Matsuo, K. Kindo and H.
A. Katori, Phys. Rev. Materials 6, L021401(6) (2022).
30. †Spin-glass transition in the spin–orbit-entangled Jeff = 0 Mott insulating double-perovskite ruthenate: H. Yatsuzuka, Y.
Haraguchi, A. Matsuo, K. Kindo and H. A. Katori, Sci Rep 12, 2429(6) (2022).

Tokunaga group
The topological Hall effect, which reflects the scalar spin chirality produced by magnetic ordering, was studied in various
magnetic materials. Our experiments on magnetotransport properties in high magnetic fields have revealed that the anomalous Hall effect grows at high temperatures after arriving at a forced ferromagnetic state in some magnetic materials. Suchphenomena suggest a new mechanism for the giant anomalous Hall effect.
1.

†Anisotropic Physical Properties of Layered Antiferromagnet U Pt Ga : Y. Matsumoto, Y. Haga, E. Yamamoto, T.
2 6
15

2.

Enhancement and Discontinuity of Effective Mass through the First-Order Metamagnetic Transition in UTe2: 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. 90, 103702(1-5) (2021).

3.

†*Spin Excitations of the S = 1/2 One-Dimensional Ising-Like Antiferromagnet BaCo V O in Transverse Magnetic
2 2 8

4.

*Ferroelectric polarization reversal in multiferroic MnWO via a rotating magnetic field up to 52 T: J. F. Wang, W. X.
4

5.

†*Field-induced valence fluctuations in YbB : R. Kurihara, A. Miyake, M. Tokunaga, A. Ikeda, Y. H. Matsuda, A.
12

6.

†*Geometrical Hall effect and momentum-space Berry curvature from spin-reversed band pairs: M. Hirschberger, Y.

7.

Quantum transport observed in films of the magnetic topological semimetal EuSb2: M. Ohno, M. Uchida, R. Kurihara,
S. Minami, Y. Nakazawa, S. Sato, M. Kriener, M. Hirayama, A. Miyake, Y. Taguchi, R. Arita, M. Tokunaga and M.
Kawasaki, Phys. Rev. B 103, 165144(1-6) (2021).

8.

*Quantum transport of topological spin solitons in a one-dimensional organic ferroelectric: S. Imajo, A. Miyake, R.

9.

†*Magnetoconduction in the Correlated Semiconductor FeSi in Ultrastrong Magnetic Fields up to a Semiconductor-

Takeuchi, A. Miyake and M. Tokunaga, J. Phys. Soc. Jpn. 90, 074707(1-6) (2021).

Fields: A. Okutani, H. Onishi, S. Kimura, T. Takeuchi, T. Kida, M. Mori, A. Miyake, M. Tokunaga, K. Kindo and M.
Hagiwara, J. Phys. Soc. Jpn. 90, 044704(1-9) (2021).

Liu, Z. Z. He, C. B. Liu, M. Tokunaga, M. Li, C. Dong, X. T. Han, F. Herlach, C. L. Lu, Z. W. Ouyang, Z. C. Xia, K.
Kindo, L. Li and M. Yang, Phys. Rev. B 104, 014415 (2021).
Miyata, D. I. Gorbunov, T. Nomura, S. Zherlitsyn, J. Wosnitza and F. Iga, Phys. Rev. B 103, 115103(1-14) (2021).

Nomura, H. Mitamura, A. Miyake, T. Koretsune, Y. Kaneko, L. Spitz, Y. Taguchi, A. Matsuo, K. Kindo, R. Arita, M.
Tokunaga and Y. Tokura, Phys. Rev. B 103, L041111(1-6) (2021).

Kurihara, M. Tokunaga, K. Kindo, S. Horiuchi and F. Kagawa, Phys. Rev. B 103, L201117 (2021).

to-Metal Transition: D. Nakamura, Y. H. Matsuda, A. Ikeda, A. Miyake, M. Tokunaga, S. Takeyama and T. Kanomata,Phys. Rev. Lett. 127, 156601 (1-6) (2021).

10. †*Coexistence of Magnetoelectric and Antiferroelectric-like Orders in Mn3Ta2O8: K. Kimura, N. Yagi, S. Hasegawa, M.
Hagihala, A. Miyake, M. Tokunaga, H. Cao, T. Masuda and T. Kimura, Inorg. Chem. 60, 15078(1-7) (2021).
11. †Enhancing Thermopower and Nernst Signal of High-Mobility Dirac Carriers by Fermi Level Tuning in the Layered* Joint research among groups within ISSP.

92

ISSP Activity Report 2021

Magnet EuMnBi2: K. Tsuruda, K. Nakagawa, M. Ochi, K. Kuroki, M. Tokunaga, H. Murakawa, N. Hanasaki and H.
Sakai, Adv. Funct. Mater. 31, 2102275 (2021).
12. †Martensitic Transformation and Metamagnetic Transition in Co-V-(Si, Al) Heusler Alloys: K. Nakamura, A. Miyake,
X. Xu, T. Omori, M. Tokunaga and R. Kainuma, Metals 11, 226(1-12) (2021).
13. †*Above-ordering-temperature large anomalous Hall effect in a triangular-lattice magnetic semiconductor: M.
Uchida, S. Sato, H. Ishizuka, R. Kurihara, T. Nakajima, Y. Nakazawa, M. Ohno, M. Kriener, A. Miyake, K. Ohishi,
T. Morikawa, M. S. Bahramy, T.-H. Arima, M. Tokunaga, N. Nagaosa and M. Kawasaki, Sci. Adv. 7, eabl5381(1-8)(2021).
14. †Observation of inverse magnetocaloric effect in magnetic-field-induced austenite phase of Heusler alloys
Ni50-xCoxMn31.5Ga18.5 (x=9 and 9.7): T. Kihara, T. Roy, X. Xu, A. Miyake, M. Tsujikawa, H. Mitamura, M. Tokunaga,
Y. Adachi, T. Eto and T. Kanomata, Phys. Rev. Materials 5, 034416(1-13) (2021).
15. †Restoration of the collinear spin arrangement in non-magnetic-ion-substituted M-type hexaferrite by high magnetic
fields: K. Kamishima, A. Yonezawa, K. Kakizaki, A. Miyake, H. Mitamura and M. Tokunaga, Journal of Magnetism andMagnetic Materials 538, 168251(1-5) (2021).
16. †Giant anomalous Hall effect from spin-chirality scattering in a chiral magnet: Y. Fujishiro, N. Kanazawa, R. Kurihara,
H. Ishizuka, T. Hori, F. S. Yasin, X. Yu, A. Tsukazaki, M. Ichikawa, M. Kawasaki, N. Nagaosa, M. Tokunaga and Y.
Tokura, Nat Commun 12, 317(1-6) (2021).
17. Molecular beam deposition of a new layered pnictide with distorted Sb square nets: M. Ohno, M. Uchida, Y. Nakazawa,
S. Sato, M. Kriener, A. Miyake, M. Tokunaga, Y. Taguchi and M. Kawasaki, APL Materials 9, 051107(1-4) (2021).
18. †Tunable spin-valley coupling in layered polar Dirac metals: M. Kondo, M. Ochi, T. Kojima, R. Kurihara, D. Sekine, M.
Matsubara, A. Miyake, M. Tokunaga, K. Kuroki, H. Murakawa, N. Hanasaki and H. Sakai, Commun Mater 2, 49(1-7)(2021).
19. Elastic Soft Mode and Electric Quadrupole Response in Excitonic Insulator Candidate (Ta0.952V0.048)2NiSe5: Contribution of Electron–Phonon Interaction: R. Kurihara, Y. Hirose, S. Sano, K. Mitsumoto, A. Miyake, M. Tokunaga and R.
Settai, J. Phys. Soc. Jpn. 91, 024601(1-7) (2022).
20. †Magnetism of AlxFe2−xGeO5 with Andalusite Structure: K. Kakimoto, S. Takada, H. Ohta, Y. Haraguchi, M. Hagihala,
S. Torii, T. Kamiyama, H. Mitamura, M. Tokunaga, A. Hatakeyama and H. A. Katori, J. Phys. Soc. Jpn. 91, 054704(1-7)(2022).
21. Extremely high upper critical field in BiCh2-based (Ch: S and Se) layered superconductor LaO0.5F0.5BiS2-xSex (x = 0.22
and 0.69): K. Hoshi, R. Kurihara, Y. Goto, M. Tokunaga and Y. Mizuguchi, Sci Rep 12, 288(1-8) (2022).
22. †Field-induced multiple metal-insulator crossovers of correlated Dirac electrons of perovskite CaIrO3: R. Yamada, J.
Fujioka, M. Kawamura, S. Sakai, M. Hirayama, R. Arita, T. Okawa, D. Hashizume, T. Sato, F. Kagawa, R. Kurihara, M.
Tokunaga and Y. Tokura, npj Quantum Mater. 7, 13(1-6) (2022).

Y. Matsuda group
The magnetic-field-induced insulator-metal transition in the correlated narrow gap semiconductor FeSi has been investigatedusing ultrahigh magnetic fields of up to 500 T generated by the electromagnetic flux compression technique. The criticalmagnetic field of the phase transition is found to be 270 T. It is found that the ingap state plays an important role in the mechanism of magnetoresistance in high magnetic fields. Closing of the energy gap due to the Zeeman shift of the electronic bands
explains the metallization in an ultrahigh magnetic field. As for the single-turn coil technique, a development of the techniques
for the generation of high magnetic fields has been made. A change in the weight of the single-turned coil affects the processof the magnetic field generation and the maximum magnetic field increases with increasing the weight. Another important
technical development has been made for the ultrasound experiment and the technique has been applied for the study of liquid
oxygen up to 140 T. The ultrasound experiment of Kondo insulator YbB12 has been performed in a relatively lower field range
up to 60 T. Although the quantum oscillation has not been observed in the response of the ultrasound, the anomalous magnetic
field dependence of the elastic constants was found at temperatures around 30 K, which suggests the magnetic-field-induced
valence fluctuation of Yb ions.
1.

†*Field-induced valence fluctuations in YbB : R. Kurihara, A. Miyake, M. Tokunaga, A. Ikeda, Y. H. Matsuda, A.
12

2.

*Phase transition in the 5d(1) double perovskite Ba CaReO induced by high magnetic field: H. Ishikawa, D. Hirai, A.
2
6

Miyata, D. I. Gorbunov, T. Nomura, S. Zherlitsyn, J. Wosnitza and F. Iga, Phys. Rev. B 103, 115103(1-14) (2021).

† Joint research with outside partners.

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93

Ikeda, M. Gen, T. Yajima, A. Matsuo, Y. H. Matsuda, Z. Hiroi and K. Kindo, Phys. Rev. B 104, 174422(7) (2021).
3.

†*Physical properties of liquid oxygen under ultrahigh magnetic fields: T. Nomura, A. Ikeda, M. Gen, A. Matsuo,

4.

†*Magnetoconduction in the Correlated Semiconductor FeSi in Ultrastrong Magnetic Fields up to a Semiconductor-

5.

†*Higher magnetic-field generation by a mass-loaded single-turn coil: M. Gen, A. Ikeda, S. Kawachi, T. Shitaokoshi, Y.

6.

*Ultrasound measurement technique for the single-turn-coil magnets: T. Nomura, A. Hauspurg, D. I. Gorbunov, A.

7.

*Ferroelectric Transition of a Chiral Molecular Crystal BINOL ∙ 2DMSO: T. Nomura, T. Yajima, Z. Yang, R. Kurihara,

8.

Generating 77 T using a portable pulse magnet for single-shot quantum beam experiments: A. Ikeda, Y. H. Matsuda,
X. Zhou, S. Peng, Y. Ishii, T. Yajima, Y. Kubota, I. Inoue, Y. Inubushi, K. Tono and M. Yabashi, Appl. Phys. Lett. 120,
142403 5pages (2022).

K. Kindo, Y. Kohama, Y. H. Matsuda, S. Zherlitsyn, J. Wosnitza, H. Tsuda and T. C. Kobayashi, Phys. Rev. B 104,
224423(10) (2021).
to-Metal Transition: D. Nakamura, Y. H. Matsuda, A. Ikeda, A. Miyake, M. Tokunaga, S. Takeyama and T. Kanomata,Phys. Rev. Lett. 127, 156601 (1-6) (2021).
H. Matsuda, Y. Kohama and T. Nomura, Review of Scientific Instruments 92, 033902 (1-5) (2021).

Miyata, E. Schulze, S. A. Zvyagin, V. Tsurkan, Y. H. Matsuda, Y. Kohama and S. Zherlitsyn, Review of Scientific
Instruments 92, 063902(8) (2021).
Y. Ishii, M. Tokunaga, Y. H. Matsuda, Y. Kohama, K. Kimura and T. Kimura, J. Phys. Soc. Jpn. 91, 064702 (2022).

Kohama group
We have investigated various high-field properties. In Pb(TiO)Cu4(PO4)4, Sn(SeS), and MAPbX3 (X = I, Br, and Cl), thefield induced phenomena have been investigated by magnetooptics in non-destructive and destructive magnetic fields. In
Ba0.9Sr0.1CuSi2O, graphite, and high-Tc superconductor, we have used specific heat and MCE techniques. The TDO and resistivity measurements have revealed rich transport phenomena in two dimensional materials, such as KZnBi and organic conductors. We have developed NMR measurement technique for measuring spin-lattice and spin-spin relaxation rates in pulsed
magnetic fields. We also have developed the ultrasound experiemnt technique for investigations in destructive pulsed fields. We
are now constructing new apparatus for the neutron scattering experiment in long pulse fields.
1.

*High-field phase diagram of Ni V O studied by specific heat and magnetocaloric effect measurements: C. Dong, Y.
3 2 8

Kohama, Z. Z. He, X. T. Han, K. Sato, A. Matsuo, K. Kindo, M. Yang and J. F. Wang, J. Phys.: Condens. Matter 33,
205402 (2021).

2.

Emergence of Frustrated Short-Range Order above Long-Range Order in the S = 1/2 Kagome Antiferromagnet
CaCu3(OD)6Cl2 ∙ 0.6D2O: Y. Ihara, K. Matsui, Y. Kohama, S. Luther, D. Opherden, J. Wosnitza, H. Kühne and H. K.
Yoshida, J. Phys. Soc. Jpn. 90, 023703 (2021).

3.

Nonreciprocal Directional Dichroism in a Magnetic-Field-Induced Ferroelectric Phase of Pb(TiO)Cu4(PO4)4: T. Katsuyoshi, K. Kimura, Z. Yang, Y. Kato, S. Kimura, Y. Motome, Y. Kohama and T. Kimura, J. Phys. Soc. Jpn. 90, 123701(2021).

4.

Combination of optical transitions of polarons with Rashba effect in methylammonium lead trihalide perovskites underhigh magnetic fields: Y. H. Shin, H. Choi, C. Park, D. Park, M. S. Jeong, H. Nojiri, Z. Yang, Y. Kohama and Y. Kim,
Phys. Rev. B 104, 035205 (2021).

5.

Element-specific field-induced spin reorientation and tetracritical point in MnCr2S4: Sh. Yamamoto, H. Suwa, T.
Kihara, T. Nomura, Y. Kotani, T. Nakamura, Y. Skourski, S. Zherlitsyn, L. Prodan, V. Tsurkan, H. Nojiri, A. Loidl and J.
Wosnitza, Phys. Rev. B 103, L020408 (2021).

6.

Heavy carrier effective masses in van der Waals semiconductor Sn(SeS) revealed by high magnetic fields up to 150 T:
Z. Yang, X. Wang, J. Felton, Z. Kudrynskyi, M. Gen, T. Nomura, X. Wang, L. Eaves, Z. D. Kovalyuk, Y. Kohama, L.
Zhang and A. Patanè, Phys. Rev. B 104, 085206 (2021).

7.

*Normal state specific heat in the cuprate superconductors La
2−xSrxCuO4 and Bi2+ySr2−x−yLaxCuO6+δ near the critical

8.

†*Physical properties of liquid oxygen under ultrahigh magnetic fields: T. Nomura, A. Ikeda, M. Gen, A. Matsuo,

point of the pseudogap phase: C. Girod, D. LeBoeuf, A. Demuer, G. Seyfarth, S. Imajo, K. Kindo, Y. Kohama, M.
Lizaire, A. Legros, A. Gourgout, H. Takagi, T. Kurosawa, M. Oda, N. Momono, J. Chang, S. Ono, G. -q. Zheng, C.
Marcenat, L. Taillefer and T. Klein, Phys. Rev. B 103, 214506 (2021).

* Joint research among groups within ISSP.

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K. Kindo, Y. Kohama, Y. H. Matsuda, S. Zherlitsyn, J. Wosnitza, H. Tsuda and T. C. Kobayashi, Phys. Rev. B 104,
224423(10) (2021).
9.

Wide Critical Fluctuations of the Field-Induced Phase Transition in Graphite: C. Marcenat, T. Klein, D. LeBoeuf, A.
Jaoui, G. Seyfarth, J. Kacmarcik, Y. Kohama, H. Cercellier, H. Aubin, K. Behnia and B. Fauque, Phys. Rev. Lett. 126,
106801 (2021).

10. *Compact megajoule-class pulsed power supply for generating long-pulsed magnetic fields: K. Matsui, T. Kanda, Y.
Ihara, K. Kindo and Y. Kohama, Review of Scientific Instruments 92, 024711 (2021).
11. †*Higher magnetic-field generation by a mass-loaded single-turn coil: M. Gen, A. Ikeda, S. Kawachi, T. Shitaokoshi, Y.
H. Matsuda, Y. Kohama and T. Nomura, Review of Scientific Instruments 92, 033902 1-5 (2021).
12. *High-resolution calorimetry in pulsed magnetic fields: S. Imajo, C. Dong, A. Matsuo, K. Kindo and Y. Kohama,
Review of Scientific Instruments 92, 043901 (2021).
13. †*Nuclear magnetic resonance measurements in dynamically controlled field pulse: Y. Ihara, K. Hayashi, T. Kanda, K.
Matsui, K. Kindo and Y. Kohama, Review of Scientific Instruments 92, 114709(8) (2021).
14. *Ultrasound measurement technique for the single-turn-coil magnets: T. Nomura, A. Hauspurg, D. I. Gorbunov, A.
Miyata, E. Schulze, S. A. Zvyagin, V. Tsurkan, Y. H. Matsuda, Y. Kohama and S. Zherlitsyn, Review of Scientific
Instruments 92, 063902(8) (2021).
15. Tunable Berry curvature and transport crossover in topological Dirac semimetal KZnBi: J. Song, B. C. Park, K. I. Sim,
J. Bang, S. Kim, Z. Yang, Y. Kohama, Y. Kim and S. W. Kim, npj Quantum Mater. 6, 77 (2021).
16. *Extraordinary π-electron superconductivity emerging from a quantum spin liquid: S. Imajo, S. Sugiura, H. Akutsu, Y.
Kohama, T. Isono, T. Terashima, K. Kindo, S. Uji and Y. Nakazawa, Phys. Rev. Research 3, 033026 (2021).
17. *Revealing three-dimensional quantum criticality by Sr substitution in Han purple: S. Allenspach, P. Puphal, J. Link,
I. Heinmaa, E. Pomjakushina, C. Krellner, J. Lass, G. S. Tucker, C. Niedermayer, S. Imajo, Y. Kohama, K. Kindo, S.
Kramer, M. Horvatic, M. Jaime, A. Madsen, A. Mira, N. Laflorencie, F. Mila, B. Normand, C. Ruegg, R. Stern and F.
Weickert, Phys. Rev. Research 3, 023177 (2021).
18. *Ferroelectric Transition of a Chiral Molecular Crystal BINOL ∙ 2DMSO: T. Nomura, T. Yajima, Z. Yang, R. Kurihara,
Y. Ishii, M. Tokunaga, Y. H. Matsuda, Y. Kohama, K. Kimura and T. Kimura, J. Phys. Soc. Jpn. 91, 064702 (2022).
19. Quantum phase of the chromium spinel oxide HgCr2O4 in high magnetic fields: S. Kimura, S. Imajo, M. Gen, T.
Momoi, M. Hagiwara, H. Ueda and Y. Kohama, Phys. Rev. B 105, L180405 (2022).

Center of Computational Materials Science
Akai group(1) The temperature dependence of intrinsic magnetic properties is one of the most important ingredients that determine
the final performance of permanent magnets. In view of this, we have developed the methods that enable us to evaluate themagnetic properties under the influence of electron-magnon and electron-phonon scattering. (2) The hyperfine field distributions in the vicinity of the interface of Fe/MgO epitaxial films was detected layer by layer measurement using synchrotron
Mössbauer source. We compare the experimental results with the first-principles calculation using KKR-CPA combined the
optimized effective potential (OEP) method. The calculated hyperfine interactions provides important information about theelectronic and lattice structure at the interfaces. (3) We have developed the method that enables us to calculate spin-wave dispersion and exchange stiffness of metallic magnet from first-principles. The exchange interactions between local spin density arecalculated by Liechtenstein's method in the momentum space. The spin-wave dispersions are then directly calculated by diagonalizing the low energy effective Hamiltonian. (4) A new data assimilation methods that assimilate experimental and theoretical
data obtained for permanent magnet materials. Based on a general framework for constructing a predictor from two data sets
including missing values, a practical scheme for magnetic materials is formulated in which a small number of experimental datain limited composition space are integrated with a larger number of first-principles calculation data. Using this scheme we haveevaluated the finite-temperature magnetization of permanent magnets over a high-dimensional composition space.
1.

Spin-wave dispersion and exchange stiffness in Nd2Fe14B and RFe11Ti (R=Y, Nd, Sm) from first-principles calculations: T. Fukazawa, H. Akai, Y. Harashima and T. Miyake, Phys. Rev. B 103, 024418(1–7) (2021).

† Joint research with outside partners.

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2.

Direct observation of magnetic Friedel oscillation at Fe(001) surface: T. Mitsui, S. Sakai, S. Li, T. Ueno, T. Watanuki, Y.
Kobayashi, R. Masuda, M. Seto and H. Akai, Hyperfine Interact 242, 37 (2021).

3.

Data assimilation method for experimental and first-principles data: Finite-temperature magnetization of (Nd, Pr, La,
Ce)2(Fe, Co, Ni)14B: Y. Harashima, K. Tamai, S. Doi, M. Matsumoto, H. Akai, N. Kawashima, M. Ito, N. Sakuma, A.
Kato, T. Shoji and T. Miyake, Phys. Rev. Materials 5, 013806(1–10) (2021).

4.

Atomistic theory of thermally activated magnetization processes in Nd2Fe14B pemanent magnet: S. Miyashita, M.
Nishino, Y. Toga, T. Hinokihara, I. E. Uysal, T. Miyake, H. Akai, S. Hirosawa and A. Sakuma, Science and Technologyof Advanced Materials 22, 658–682 (2021).

5.

Understanding and optimization of hard magnetic compounds from first principles: T. Miyake, Y. Harashima, T.
Fukazawa and H. Akai, Science and Technology of Advanced Materials 22, 543–556 (2021).

6.

鉄の表面近傍の特異な磁性を発見—原子一層毎に磁気モーメントの大きさが増減する : 三井 隆也 , 境誠 司 , 瀬戸 誠 , 赤
井 久純 , 日本物理学会誌 77, 23-28 (2022).

7.

First-principles investigation of Nd(Fe,M)12 (M=k–Br) and Nd(Fe,Cr,Co,Ni,Ge,As): Possible enhancers of Curie
temperature for NdFe12 magnetic compounds: T. Fukazawa, H. Akai, Y. Harashima and T. Miyake, Acta Materialia 226,
117597 (2022).

8.

*Automatic exhaustive calculations of large material space by Korringa-Kohn-Rostoker coherent potential approxima-tion method — Applied to equiatomic quaternary high entropy alloys: T. Fukushima, H. Akai, T. Chikyow and H. Kino,
Pays. Rev. Mater. 6, 023802(1-19) (2022).

Laser and Synchrotron Research Center
Kobayashi group
We are developing state-of-the-art laser system for laser processing and breath diagnosis. Process informatics is a new target to
study.
1.

*Direct generation of sub-picosecond pulse via multi-section gain switching: T. Nakamura, T. Ito, H. Nakamae, C. Kim,

Y. Hazama, Y. Kobayashi, R. Kuroda and H. Akiyama, Opt. Lett. 46, 1277 (2021).

2. レーザー加工の学理探索とデータ科学 : 小林 洋平 , 精密工学会誌 87, 601 (2021).
3.

Independent contribution of optical attenuation length in ultrafast laser-induced structural change: T. Shibuya, K.
Sakaue, H. Ogawa, D. Satoh, T.-H. Dinh, M. Ishino, M. Tanaka, M. Washio, T. Higashiguchi, M. Nishikino, A. Kon, Y.
Kubota, Y. Inubushi, S. Owada, Y. Kobayashi and R. Kuroda, Opt. Express 29, 33121 (2021).

4.

次世代レーザー及び加工の共通基盤技術開発 : 中里 智治 , レーザー加工学会誌 10, 135 (2021).

5.

Coherent control of acoustic phonons in a silica fiber using a multi-GHz optical frequency comb: M. Endo, S. Kimura,
S. Tani and Y. Kobayashi, Commun Phys 4, 73 (2021).

6.

†Ultrafast laser processing of ceramics: Comprehensive survey of laser parameters: A. Narazaki, H. Takada, D. Yoshitomi, K. Torizuka and Y. Kobayashi, Journal of Laser Applications 33, 012009 (2021).

7.

†Fully Automated Data Acquisition for Laser Production Cyber-Physical System: Y. Kobayashi, T. Takahashi, T.

Nakazato, H. Sakurai, H. Tamaru, K. Ishikawa, K. Sakaue and S. Tani, IEEE J. Select. Topics Quantum Electron. 27, 1(2021).

8. レーザー加工 CPS 開発 : 坂上 和之 , 田丸 博晴 , 小林 洋平 , オプトロニクス 9, 74 (2021).
9.

† 次世代のモノづくり拠点を目指すレーザー加工プラットフォームとデータベース : 中里 智治 , 高塚 肇 , 西林 一彦 , 田丸 博

晴 , 小林 洋平 , 湯本 潤司 , オプトロニクス 3, 91 (2021).

10. Autonomous parameter optimization for femtosecond laser micro-drilling: K. Bamoto, H. Sakurai, S. Tani and Y.
Kobayashi, Opt. Express 30, 243 (2022).
11. Ultrafast laser ablation simulator using deep neural networks: S. Tani and Y. Kobayashi, Sci Rep 12, 5837 (2022).

* Joint research among groups within ISSP.

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12. Fiber lasers: Z. Z. K. Y. J. S, in: Handbook of Laser Micro- and Nano-Engineering, edited by Koji Sugioka, (Springer
nature Switzerland, 2021), 1-32.

Harada group
We are developing instrumentation and exploring novel applications of soft X-ray emission spectroscopy in preparation for
the next generation of synchrotron radiation. We discussed the segmented cross undulator as a novel polarization-controlled
light source. Additionally, a soft X-ray CMOS image sensor with a wide dynamic range (WDR) is proposed (sxCMOS). We
detected fully spin-polarized electronic states in the buried magnetic layer of Co2MnSi, a prototype of semi-metallic Heusler
alloys, using RIXS-MCD, as a pioneering application of the newly developed analytical approach. The minority-spin Fe-3d
impurity band (IB) in (In,Fe)As, a typical n-type FMS, was studied using soft X-ray angle-resolved photoemission spectroscopy(SX-ARPES). The itinerant/localized nature of distinct dd excitations in TiO2 nanocrystals with lattice multiphase was revealed
by RIXS measurements on both Ti and O sites. In addition, various solutions and solid-liquid interfaces were investigated by
RIXS. An isolated water molecule strongly interacting with an Li ion in a new high-salt concentration aqueous electrolyte
solution "hydrate melt" was identified by RIXS and first-principles molecular dynamics simulation. RIXS of colloidal dispersions of multi-walled carbon nanotubes treated by solution plasma revealed the reconstruction of hydrogen-bonded network ofwater via orbital hybridization with the oxygen-containing functional groups generated by plasma treatment. In addition, we
analyzed water encapsulated in the loop-shaped polyethylene glycol chain brushes and observed the absence of entropicallyfavored tetrahedrally coordinated water, which possibly regulates the biocompatibility.
1.

†Minority-spin impurity band in n-type (In,Fe)As: A materials perspective for ferromagnetic semiconductors: M.

2.

†Soft X-ray Emission Studies on Hydrate-Melt Electrolytes: T. Shimada, N. Takenaka, E. Watanabe, Y. Yamada, Y.-T.

3.

†Soft X-ray emission spectroscopy for the electronic state of water molecules influenced by plasma-treated multi-

4.

A Global Shutter Wide Dynamic Range Soft X-Ray CMOS Image Sensor With Backside- Illuminated Pinned Photodiode, Two-Stage Lateral Overflow Integration Capacitor, and Voltage Domain Memory Bank: H. Shike, R. Kuroda,
R. Kobayashi, M. Murata, Y. Fujihara, M. Suzuki, S. Harada, T. Shibaguchi, N. Kuriyama, T. Hatsui, J. Miyawaki, T.
Harada, Y. Yamasaki, T. Watanabe, Y. Harada and S. Sugawa, IEEE Trans. Electron Devices 68, 2056-2063 (2021).

5.

†Detecting halfmetallic electronic structures of spintronic materials in a magnetic field: H. Fujiwara, R. Y. Umetsu, F.

6.

†*Fast and versatile polarization control of X-ray by segmented cross undulator at SPring-8: J. Miyawaki, S. Yamamoto,7.

†Hydrogen-Bonded Structure of Water in the Loop of Anchored Polyrotaxane Chain Controlled by Anchoring Density:

8.

†Electronic surface reconstruction of TiO nanocrystals revealed by resonant inelastic x-ray scattering: C.-H. Chuang,
2

9.

†The Near Future of Synchrotron Radiation Operando Analysis : Development of Soft X-ray Absorption and Emission

Kobayashi, L. D. Anh, J. Minar, W. Khan, S. Borek, P. N. Hai, Y. Harada, T. Schmitt, M. Oshima, A. Fujimori, M.
Tanaka and V. N. Strocov, Phys. Rev. B 103, 115111 (1-10) (2021).
Cui, Y. Harada, M. Okubo and A. Yamada, J. Phys. Chem. B 125, 11534-11539 (2021).

walled carbon nanotubes: N. Sakakibara, K. Inoue, S. Takahashi, T. Goto, T. Ito, K. Akada, J. Miyawaki, Y. Hakuta, K.
Terashima and Y. Harada, Phys. Chem. Chem. Phys. 23, 10468-10474 (2021).

Kuroda, J. Miyawaki, T. Kashiuchi, K. Nishimoto, K. Nagai, A. Sekiyama, A. Irizawa, Y. Takeda, Y. Saitoh, T. Oguchi,
Y. Harada and S. Suga, Sci Rep 11, 18654 (1-9) (2021).
Y. Hirata, M. Horio, Y. Harada and I. Matsuda, AAPPS Bull. 31, 25-1,-24 (2021).

K. Akada, K. Yamazoe, J. Miyawaki, R. Maeda, K. Ito and Y. Harada, Front. Chem. 9, 743255 (1-8) (2021).

C.-M. Chen, Y.-C. Shao, P.-H. Yeh, C.-M. Chang, W.-F. Pong, M. Kapilashrami, P.-A. Glans, S. Gul, G. Wang, Y. Li,
J. Zhang, J. Miyawaki, H. Niwa, Y. Harada, J.-M. Chen and J. Guo, Journal of Vacuum Science & Technology A 39,
063204 (1-6) (2021).
Spectroscopy for Functional Materials: Y. HARADA, Journal of the Japan Society for Precision Engineering 87, 34-38(2021).

10. † 放射光軟 X 線分光法によるリチウムイオン電池の電子状態オペランド計測 : 細野 英司 , 原田 慈久 , 朝倉 大輔 , 計測と制御 60, 207-212 (2021).
11. † 高分子内に入り込んだ水の電子状態観測 : 倉橋 直也 , 山添 康介 ,「【水】と機能性ポリマーに関する材料設計・最新応用」,
第 2 章 第 2 節 ,（株）技術情報協会 企画編集 , (（株）技術情報協会 , 2021), 42-52.

I. Matsuda group† Joint research with outside partners.

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The global pandemics of coronavirus disease (COVID-19) continued in 2021. We carried out research and user-supports withcare at the beamline, SPring-8 BL07LSU. Since a project of the next-generation synchrotron radiation facility was launched,
we participated devotedly in the construction and started technical developments, such as nano-focusing and scanning measurements. In the laboratory, we have succeeded in updating the soft X-ray non-linear optical effect into a spectroscopic method formaterials science at X-ray free electron laser facility at SACLA.
1.

Atomic arrangements of quasicrystal bilayer graphene: Interlayer distance expansion: Y. Fukaya, Y. Zhao, H.-W. Kim, J.
R. Ahn, H. Fukidome and I. Matsuda, Phys. Rev. B 104, L180202(1-5) (2021).

2.

Polarization-Resolved Extreme-Ultraviolet Second-Harmonic Generation from LiNbO3: C. B. Uzundal, S. Jamnuch,
E. Berger, C. Woodahl, P. Manset, Y. Hirata, T. Sumi, A. Amado, H. Akai, Y. Kubota, S. Owada, K. Tono, M. Yabashi,
J. W. Freeland, C. P. Schwartz, W. S. Drisdell, I. Matsuda, T. A. Pascal, A. Zong and M. Zuerch, Phys. Rev. Lett. 127,
237402(1-8) (2021).

3.

† ビスマス薄膜を通して「見る」表面物理学の新展開 : 伊藤 俊 , 松田 巌 , 日本物理学会誌 76, 566-574 (2021).

4.

Recent Progress in Spectroscopies Using Soft X-ray Free-electron Lasers: I. Matsuda and Y. Kubota, Chem. Lett. 50,
1336-1344 (2021).

5.

†*Band Bending of n-GaN under Ambient H O Vapor Studied by X-ray Photoelectron Spectroscopy: Y. Imazeki, M.
2

6.

†*Comparative Study of H O and O Adsorption on the GaN Surface: M. Sato, Y. Imazeki, T. Takeda, M. Kobayashi, S.
2
2

7.

†*Femtosecond Charge Density Modulations in Photoexcited CuWO : Y. Uemura, A. S. M. Ismail, S. H. Park, S. Kwon,
4

8.

Influence of Stacking Order of Phthalocyanine and Fullerene Layers on the Photoexcited Carrier Dynamics in Model
Organic Solar Cell: K. Ozawa, S. Yamamoto, T. Miyazawa, K. Yano, K. Okudaira, K. Mase and I. Matsuda, J. Phys.
Chem. C 125, 13963-13970 (2021).

9.

Extreme Ultraviolet Second Harmonic Generation Spectroscopy in a Polar Metal: E. Berger, S. Jamnuch, C. B.
Uzundal, C. Woodahl, H. Padmanabhan, A. Amado, P. Manset, Y. Hirata, Y. Kubota, S. Owada, K. Tono, M. Yabashi, C.
Wang, Y. Shi, V. Gopalan, C. P. Schwartz, W. S. Drisdell, I. Matsuda, J. W. Freeland, T. A. Pascal and M. Zuerch, Nano
Lett. 21, 6095-6101 (2021).

Sato, T. Takeda, M. Kobayashi, S. Yamamoto, I. Matsuda, J. Yoshinobu, M. Sugiyama and Y. Nakano, J. Phys. Chem. C
125, 9011 (2021).
Yamamoto, I. Matsuda, J. Yoshinobu, Y. Nakano and M. Sugiyama, J. Phys. Chem. C 125, 25807 (2021).

M. Kim, Y. Niwa, H. Wadati, H. Elnaggar, F. Frati, T. Haarman, N. Höppel, N. Huse, Y. Hirata, Y. Zhang, K. Yamagami,
S. Yamamoto, I. Matsuda, T. Katayama, T. Togashi, S. Owada, M. Yabashi, U. Halisdemir, G. Koster, T. Yokoyama, B.
M. Weckhuysen and F. M. F. D. Groot, J. Phys. Chem. C 125, 7329 (2021).

10. A novel measurement approach for near-edge x-ray absorption fine structure: Continuous 2 π angular rotation of linear
polarization: Y. Kudo, Y. Hirata, M. Horio, M. Niibe and I. Matsuda, Nuclear Instruments and Methods in Physics
Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 1018, 165804(1-5) (2021).
11. †Electronic structure of a borophene layer in rare-earth aluminum/chromium boride and its hydrogenated derivative
borophane: M. Niibe, M. Cameau, N. T. Cuong, O. I. Sunday, X. Zhang, Y. Tsujikawa, S. Okada, K. Yubuta, T. Kondo
and I. Matsuda, Phys. Rev. Materials 5, 084007-1,-8 (2021).
12. †Valence Fluctuations in Yb(Al,Fe)B4 Studied by Nanosecond-time-resolved Photoemission Spectroscopy Using
Synchrotron Radiation: M. Okawa, K. Akikubo, S. Yamamoto, I. Matsuda and T. Saitoh, e-J. Surf. Sci. Nanotechnol. 19,
20-23 (2021).
13. *Ultrafast optical stress on BaFe2As2: T. Suzuki, Y. Kubota, A. Nakamura, T. Shimojima, K. Takubo, S. Ito, K.
Yamamoto, S. Michimae, H. Sato, H. Hiramatsu, H. Hosono, T. Togashi, M. Yabashi, H. Wadati, I. Matsuda, S. Shin andK. Okazaki, Phys. Rev. Research 3, 033222 (2021).
14. †*Fast and versatile polarization control of X-ray by segmented cross undulator at SPring-8: J. Miyawaki, S. Yamamoto,Y. Hirata, M. Horio, Y. Harada and I. Matsuda, AAPPS Bull. 31, 25(1-24) (2021).
15. *Environmental effects on layer-dependent dynamics of Dirac fermions in quasicrystalline bilayer graphene: Y. Zhao,
T. Suzuki, T. Iimori, H. -W. Kim, J. R. Ahn, M. Horio, Y. Sato, Y. Fukaya, T. Kanai, K. Okazaki, S. Shin, S. Tanaka, F.
Komori, H. Fukidome and I. Matsuda, Phys. Rev. B 105, 115304 (2022).
16. *Photoinduced transient states of antiferromagnetic orderings in La1/3Sr2/3FeO3 and SrFeO3−δ thin films observed
through time-resolved resonant soft x-ray scattering: K. Yamamoto, T. Tsuyama, S. Ito, K. Takubo, I. Matsuda, N.
Pontius, C. Schüßler-Langeheine, M. Minohara, H. Kumigashira, Y. Yamasaki, H. Nakao, Y. Murakami, T. Katase, T.
* Joint research among groups within ISSP.

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Kamiya and H. Wadati, New J. Phys. 24, 043012(1-9) (2022).
17. †*Functionalization of the MoS2 basal plane for activation of molecular hydrogen by Pd deposition: F. Ozaki, S. Tanaka,
W. Osada, K. Mukai, M. Horio, T. Koitaya, S. Yamamoto, I. Matsuda and J. Yoshinobu, Applied Surface Science 593,
153313 (2022).
18. †*Hydrogen absorption and diffusion behaviors in cube-shaped palladium nanoparticles revealed by ambient-pressure
X-ray photoelectron spectroscopy: J. Tang, O. Seo, D. S. R. Rocabado, T. Koitaya, S. Yamamoto, Y. Nanba, C. Song,J. Kim, A. Yoshigoe, M. Koyama, S. Dekura, H. Kobayashi, H. Kitagawa, O. Sakata, I. Matsuda and J. Yoshinobu,
Applied Surface Science 587, 152797 (2022).
19. Separating Non-linear Optical Signals of a Sample from High Harmonic Radiation in a Soft X-ray Free Electron Laser:
T. Sumi, M. Horio, T. Senoo, T. Wada, Y. Tsujikawa, X. Zhang, P. Manset, M. Araki, Y. Hirata, W. S. Drisdell, J. W.
Freeland, A. Amado, M. Zuerch, Y. Kubota, S. Owada, K. Tono, M. Yabashi, C. P. Schwartz and I. Matsuda, e-J. Surf.
Sci. Nanotechnol. 20, 31(1-5) (2022).
20. Electronic Structures of Polymorphic Layers of Borophane: I. Tateishi, X. Zhang and I. Matsuda, Molecules 27, 1808(113) (2022).
21. †Measurement of X-ray Magnetic Linear Dichroism by Rotating Polarization Angle of Soft X-ray Generated by a
Segmented Undulator: Y. Kudo, M. Horio, Y. Hirata, T. Ohkochi, T. Kinoshita and I. Matsuda, e-Journal of Surface
Science and Nanotechnology (2022), accepted for publication.
22. 2D boron: Boraphene, Borophene, Boronene: I. Matsuda and K. Wu ed., (Springer Nature, Switzerland, 2021).
23. 物理科学，この 1 年 2022: 松田 巌 , 近藤 剛弘他 , ( 丸善出版 , 東京都千代田区 , 2022).

Itatani group
Advancements in soft x-ray attosecond spectroscopy and attosecond beamlines were also continued. First, quantum mechanicalsimulation revealed that the 2ω oscillations observed in a triatomic molecule (N2O) arise from tunnel ionization of core-excitedstates, leading to a new understanding of transient absorption spectroscopy using soft x-ray attosecond pulses. Second, a waterflat-jet system was developed for transient soft X-ray spectroscopy of liquids and solvents. High-order harmonics coupled withmolecular vibrations were observed upon irradiation of intense mid-infrared pulses. Further experiments are now underway toelucidate molecular dynamics. Third, high-field electron scattering experiments were performed, and the cutoff behavior was
successfully discussed in terms of quantum theory. Finally, a new infrared parametric light source using a Yb-based solid-statelaser was developed, and phase-stable sub-30 fs pulses were obtained at repetition rates of 10 kHz and 100 kHz. In addition, a
Yb-based solid-state laser was used to generate 6-eV pulses for angle-resolved photoemission spectroscopy.
1.

*High-harmonic generation in GaAs beyond the perturbative regime: P. Xia, T. Tamaya, C. Kim, F. Lu, T. Kanai, N.

2.

†Observation of the quantum shift of a backward rescattering caustic by carrier-envelope phase mapping: T. Mizuno, N.

3.

*Optical parametric amplification of phase-stable terahertz-to-mid-infrared pulses studied in the time domain: N. Kanda,
N. Ishii, J. Itatani and R. Matsunaga, Optics Express 29, 3479-3489 (2021).

4.

†Time-domain spectroscopy of optical parametric amplification for phase-stable terahertz-to-midinfrared pulses: N.

5.

†Magnetic Domain Control of ErFeO by Intense Terahertz Free Electron Laser Pulses: M. Nakajima, G. Isoyama and T.
3

6.

Attosecond electronic dynamics of core-excited states of N2O in the soft x-ray region,: N. Saito, N. Douguet, H.
Sannohe, N. Ishii, T. Kanai, Y. Wu, A. Chew, S. Han, B. I. Schneider, J. Olsen, L. Argenti, Z. Chang and J. Itatani, Phys.
Rev. Res. 3, 043222(1-8) (2021).

7.

*Photo-Excitation Band-Structure Engineering of 2H-NbSe

8.

†Ultrafast multidimensional spectroscopy with field resolution and noncollinear geometry at mid-infrared frequencies:

Ishii, J. Itatani, H. Akiyama and T. Kato, Phys. Rev. B 104, L121202(1-6) (2021).

Ishii, T. Kanai, P. Rosenberger, D. Zietlow, M. F. Kling, O. I. Tolstikhin, T. Morishita and J. Itatani, Phys. Rev. A 103,
043121 (2021).

Kanda, N. Ishii, J. Itatani and R. Matsunaga, Optics Express 29(3), 3479-3489 (2021).
Kurihara, IEEE Trans. on Plasma Sci 49, 3344-3350 (2021).

2 Probed by Time- and Angle-Resolved Photoemission
Spectroscopy: M. Watanabe, T. Suzuki, T. Someya, Y. Ogawa, S. Michimae, M. Fujisawa, T. Kanai, J. Itatani, T. Saitoh,
S. Shin and K. Okazaki, J. Phys. Soc. Jpn. 91, 064703 (2022).

T. Deckert, J. Allerbeck, T. Kurihara and D. Brida, New J. Phys. 24, 023005(1-9) (2022).
† Joint research with outside partners.

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9.

†Spin canting in nonlinear terahertz magnon dynamics revealed by magnetorefractive probing in orthoferrite: T.

Kurihara, M. Bamba, H. Watanabe, M. Nakajima and T. Suemoto, arXiv 2202, 11365 (2022).

Kondo group
We gave the evidence for a higher-order topological insulator in a three-dimensional material built from van der Waals stackingof bismuth-halide chains and visualized the strain-induced topological phase transition in a quasi-one-dimensional superconductor TaSe3.
1.

Reduced Hall carrier density in the overdoped strange metal regime of cuprate supercond.: C. Putzke, S. Benhabib, W.
Tabis, J. Ayres, Z. Wang, L. Malone, S. Licciardello, J. Lu, T. Kondo, T. Takeuchi, N. E. Hussey, J. R. Cooper and A.
Carrington, Nature Phys. 17, 826-831 (2021).

2.

*Observation and control of the weak topological insulator state in ZrTe : P. Zhang, R. Noguchi, K. Kuroda, C. Lin, K.
5

3.

Anomalous vortex liquid in charge-ordered cuprate superconductors: Y.-T. Hsu, M. Berben, M. culo, S. Adachi, T.
Kondo, T. Takeuchi, Y. Wang, S. Wiedmann, S. M. Hayden and N. E. Hussey, Proc. Natl. Acad. Sci. U.S.A. 118,e2016275118(1-6) (2021).

4.

*Evidence for a higher-order topological insulator in a three-dimensional material built from van der Waals stacking

5.

*Visualization of the strain-induced topological phase transition in a quasi-one-dimensional superconductor TaSe : C.
3

6.

*Scaling law for Rashba-type spin splitting in quantum-well films: R. Noguchi, K. Kuroda, M. Kawamura, K. Yaji, A.

7.

*Multipole polaron in the devil’s staircase of CeSb: Y. Arai, K. Kuroda, T. Nomoto, Z. H. Tin, S. Sakuragi, C. Bareille,

8.

Large anomalous Hall effect induced by weak ferromagnetism in the noncentrosymmetric antiferromagnet CoNb3S6: H.
Tanaka, S. Okazaki, K. Kuroda, R. Noguchi, Y. Arai, S. Minami, S. Ideta, K. Tanaka, D. Lu, M. Hashimoto, V. Kandyba,
M. Cattelan, A. Barinov, T. Muro, T. Sasagawa and T. Kondo, Phys. Review B 105, 121102(1-7) (2022).

9.

*Selective observation of surface and bulk bands in polar WTe by laser-based spin- and angle-resolved photoemission
2

Kawaguchi, K. Yaji, A. Harasawa, M. Lippmaa, S. Nie, H. Weng, V. Kandyba, A. Giampietri, A. Barinov, Q. Li, G. D.
Gu, S. Shin and T. Kondo, Nat. Commun. 12, 406 (2021).

of bismuth-halide chains: R. Noguchi, M. Kobayashi, Z. Jiang, K. Kuroda, T. Takahashi, Z. Xu, D. Lee, M. Hirayama,
M. Ochi, T. Shirasawa, P. Zhang, C. Lin, C. Bareille, S. Sakuragi, H. Tanaka, S. Kunisada, K. Kurokawa, K. Yaji, A.
Harasawa, V. Kandyba, A. Giampietri, A. Barinov, T. K. Kim, C. Cacho, M. Hashimoto, D. Lu, S. Shin, R. Arita, K. Lai,
T. Sasagawa and T. Kondo, Nature Materials 20, 473-479 (2021).
Lin, M. Ochi, R. Noguchi, K. Kuroda, M. Sakoda, A. Nomura, M. Tsubota, P. Zhang, C. Bareille, K. Kurokawa, Y.
Arai, K. Kawaguchi, H. Tanaka, K. Yaji, A. Harasawa, M. Hashimoto, D. Lu, S. Shin, R. Arita, S. Tanda and T. Kondo,
Nature Materials 20, 1093-1099 (2021).
Harasawa, T. Iimori, S. Shin, F. Komori, T. Ozaki and T. Kondo, Phys. Review B 103, 180409(1-6) (2021).

S. Akebi, K. Kurokawa, Y. Kinoshita, W. -L. Zhang, S. Shin, M. Tokunaga, H. Kitazawa, Y. Haga, H. S. Suzuki, S.
Miyasaka, S. Tajima, K. Iwasa, R. Arita and T. Kondo, Nat. Mater. 21, 410(1-7) (2022).

spectroscopy.: Y. Wan, L. Wang, K. Kuroda, P. Zhang, K. Koshiishi, M. Suzuki, J. Kim, R. Noguchi, C. Bareille, K.
Yaji, A. Harasawa, S. Shin, S.-W. Cheong, A. Fujimori and T. Kondo, Phys. Review B 105, 085421 (2022).

10. *Visualization of optical polarization transfer to photoelectron spin vector emitted from a spin-orbit coupled surface
state.: K. Kuroda, K. Yaji, R. Noguchi, A. Harasawa, S. Shin, T. Kondo and F. Komori, Phys. Review B 105,
121106(1-6) (2022).

Matsunaga group
We have investigated light-matter interactions and light-induced nonequilibrium phenomena in solids by utilizing terahertz(THz) pulse. By using a Yb-based laser system and the multiplate broadening scheme, we realized phase-stable broadband
multiterahertz pulses (10-45 THz, 40-180 meV, or 7-30 μm) with the pulse width of 28 fs. By using the multiterahertz pulse fortime-resolved detection of complex response functions, we have investigated ultrafast dynamics of the photoexcited electrons
in a 3D Dirac semimetal Cd3As2. We also demonstrate that a large reduction of the refractive index by 80% dominates thenonequilibrium infrared response of the Dirac semimetal, which can be utilized for designing ultrafast switches in active
optoelectronics.
1.

* ワイル反強磁性金属 Mn Sn 薄膜の室温テラヘルツ異常ホール効果 : 松田 拓也 , 肥後 友也 , 神田 夏輝 , 松永 隆佑 , 応
3* Joint research among groups within ISSP.

100

ISSP Activity Report 2021

用物理 90, 752 (2021).

2.

テラヘルツパルス技術で拓く物性物理学と新奇機能性 : 松永 隆佑 , レーザー研究 49, 325 (2021).

3.

*Optical parametric amplification of phase-stable terahertz-to-mid-infrared pulses studied in the time domain: N. Kanda,

4.

Topological Materials for Functional Optoelectronic Devices: H. Chorsi, B. Cheng, B. Zhao, J. Toudert, V. Asadchy, O.
F. Shoron, S. Fan and R. Matsunaga, Advanced Functional Materials 32, 2110655 (2022).

5.

*Tracking Ultrafast Change of Multiterahertz Broadband Response Functions in a Photoexcited Dirac Semimetal

N. Ishii, J. Itatani and R. Matsunaga, Optics Express 29, 3479-3489 (2021).

Cd3As2 Thin Film: N. Kanda, Y. Murotani, T. Matsuda, M. Goyal, S. Salmani-Rezaie, J. Yoshinobu, S. Stemmer and R.
Matsunaga, Nano Letters 22, 2358 (2022).

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 2021, we have revealed the two-fold symmetric superconducting gap of FeSe0.78S0.22 irrespective of its four-fold symmetric crystal structure by high-resolution laser ARPES. In
addition, we have revealed a characteristic electron-phonon coupling during the photo-induced insulator-to-metal transition in
1T-TaS2 from the FDARPES measurements by using HHG laser time-resolved ARPES.
1.

*Detecting electron-phonon coupling during photoinduced phase transition: T. Suzuki, Y. Shinohara, Y. Lu, M.

2.

*Ultrafast optical stress on BaFe As : T. Suzuki, Y. Kubota, A. Nakamura, T. Shimojima, K. Takubo, S. Ito, K.
2 2

3.

Discovery of Pressure-Induced Superconductivity in an Excitonic Insulator: K. Okazaki, JPSJ News Comments 18, 11(2021).

4.

*Photo-Excitation Band-Structure Engineering of 2H-NbSe

5.

*Environmental effects on layer-dependent dynamics of Dirac fermions in quasicrystalline bilayer graphene: Y. Zhao,

6.

HHG-laser-based time- and angle-resolved photoemission spectroscopy of quantum materials: T. Suzuki, S. Shin and K.
Okazaki, Journal of Electron Spectroscopy and Related Phenomena 251, 147105 (2021).

Watanabe, J. Xu, K. L. Ishikawa, H. Takagi, M. Nohara, N. Katayama, H. Sawa, M. Fujisawa, T. Kanai, J. Itatani, T.
Mizokawa, S. Shin and K. Okazaki, Phys. Rev. B 103, L121105 (2021).
Yamamoto, S. Michimae, H. Sato, H. Hiramatsu, H. Hosono, T. Togashi, M. Yabashi, H. Wadati, I. Matsuda, S. Shin andK. Okazaki, Phys. Rev. Research 3, 033222 (2021).

2 Probed by Time- and Angle-Resolved Photoemission
Spectroscopy: M. Watanabe, T. Suzuki, T. Someya, Y. Ogawa, S. Michimae, M. Fujisawa, T. Kanai, J. Itatani, T. Saitoh,
S. Shin and K. Okazaki, J. Phys. Soc. Jpn. 91, 064703 (2022).

T. Suzuki, T. Iimori, H. -W. Kim, J. R. Ahn, M. Horio, Y. Sato, Y. Fukaya, T. Kanai, K. Okazaki, S. Shin, S. Tanaka, F.
Komori, H. Fukidome and I. Matsuda, Phys. Rev. B 105, 115304 (2022).

Kimura group
In FY2021, the Kimura group worked on the development of in-situ imaging techniques for mixing reactions of solution
samples using the X-ray free-electron laser at SACLA and microscopic imaging techniques using soft X-rays at BL07LSU ofSPring-8. In the experiment at SACLA, we succeeded in imaging nanoparticle structures in a mixed solution at sub-10-nanometer resolution; in the experiment at SPring-8 BL07LSU, we constructed a soft x-ray ptychography system using total-reflection Wolter mirror optics.
1.
2.
3.
4.

Copper electroforming replication process for soft x-ray mirrors: G. Yamaguchi, H. Motoyama, S. Owada, Y. Kubota,
S. Egawa, T. Kume, Y. Takeo, M. Yabashi and H. Mimura, Review of Scientific Instruments 92, 123106 (2021).
Current status of development of electroforming process for high precision soft x-ray mirrors: T. Kume, G. Yamaguchi,
K. Hiraguri, Y. Matsuzawa, Y. Imamura, H. Miyashita, T. Saito, Y. Takeo, Y. Senba, H. Kishimoto, H. Ohashi, H.
Hashizume, H. Mimura, C. Morawe, A. M. Khounsary and S. Goto, Proc. of SPIE 11837(1-5) (2021).
Development of figure correction system for axisymmetric x-ray mirrors: S. Yokomae, Y. Takeo, T. Shimamura, Y.
Matsuzawa, T. Kume, Y. Senba, H. Kishimoto, H. Ohashi, H. Mimura, C. Morawe, A. M. Khounsary and S. Goto,
Proc. of SPIE 11837(1-7) (2021).
Electrodeposition simulation for fabricating Wolter mirrors of x-ray telescopes: A. Ito, G. Yamaguchi, T. Watanabe, Y.
† Joint research with outside partners.

ISSP Activity Report 2021

101

5.

Takeo, T. Kume, Y. Matsuzawa, T. Saito, K. Hiraguri, K. Tamura, A. Takigawa, T. Kanoh, N. Ishida, I. Mitsuishi, H.
Hashizume, H. Mimura, C. Morawe, A. M. Khounsary and S. Goto, Proc. of SPIE 11837(1-9) (2021).
An arrayed-window microfluidic device for observation of mixed nanoparticles with an X-ray free-electron laser: Y.
Matsumoto, Y. Takeo, S. Egawa, G. Yamaguchi, S. Yokomae, M. Takei, H. Yumoto, T. Koyama, H. Ohashi, K. Tono,
M. Yabashi, H. Mimura and T. Kimura, Opt Rev 29, 7 (2022).

* Joint research among groups within ISSP.

102

ISSP Activity Report 2021

ISSP Activity Report 2021

103

Subject of Joint Research

2021年度

共同利用課題一覧（前期）/ Joint Research List 2021 (First Term)

2021年度

共同利用課題一覧（後期）/ Joint Research List (Latter Term)

2021年度

中性子科学研究施設

2021年度

軌道放射物性研究施設 共同利用課題一覧 / Joint Research List of Synchrotron Radiation Research Project 2021

2021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 2021

2021年度CCMSスパコン共用事業枠課題一覧 / Supercomputing Consortium for Computational Materials Science Project List of Supercomputer System 2021

共同利用課題一覧 / Joint Research List of Neutron Scattering Research Project 2021

ISSP Activity Report 2021

104

2021年度

共同利用課題一覧（前期）/ Joint Research List 2021 (First Term)※実施課題一覧、所属は申請時のデータ

嘱託課題 / Commission Research Project
Member of research
No.

課題番号

課題名

氏名

所属

分担者

Title

Name

Organization

担当所員
project

スピン偏極走査トンネル顕微鏡測定の安定動作手
1 202012-CMBXX-0036

Development of stable measurements of spin吉田 靖雄

金沢大学

法の開発

Yasuo Yoshida

Kanazawa University

長谷川 幸雄Tetsujiro Eto

Kurume Institute of Technology

上床 美也

Miho Itoi

Nihon University

上床 美也

polarized scanning tunneling microscopy
Development of High Pressure X-ray diffraction

2 202012-CMBXX-0021

高圧下X線回折法の開発

江藤 徹二郎

久留米工業大学
measurements
Study on pressure induced superconductivity of low

3 202012-CMBXX-0022

低次元有機物質の圧力下物性研究

糸井 充穂

日本大学
dimension organic conductor

Comprehensive Research
総合科学研究機構
4 202012-CMBXX-0025

中性子回折用圧力発生装置の開発

中性子科学

Development of high pressure apparatus for宗像 孝司

Organization for Science andKoji Munakata

センター

neutron diffraction

上床 美也
Society, Neutron Science andTechnology Center

希釈冷凍機温度で使用可能な10 GPa級超高圧発生
5 202012-CMBXX-0026

松林 和幸

Development of 10 GPa class high pressure

Kazuyuki

The University of Electro-

apparatus for low temperature

Matsubayashi

Communications

Rikio Settai

Niigata University

電気通信大学

上床 美也

装置の開発

Development of quantum oscillation under high
6 202012-CMBXX-0027

高圧下量子振動観測システムの開発

摂待 力生

新潟大学

上床 美也

pressure
National Institute of Advanced
7 202012-CMBXX-0028

8 202012-CMBXX-0029
9 202012-CMBXX-0030

酸化物試料の作製と高圧下物性測定

極低温下の磁気特性
圧力下NMR測定法に関する開発

川中 浩史

鳥塚 潔
藤原 直樹

Sample preparation and high pressure

Hirofumi

experiments

Kawanaka

Development of magnetic measurement method

Kiyoshi Torizuka

Nippon Institute of Technology

上床 美也

Naoki Fujiwara

Kyoto University

上床 美也

Keizo Murata

Osaka City University

上床 美也

産業技術総合研究所

Industrial Science and日本工業大学

Development of NMR measurement method under
京都大学

上床 美也

Technology

high pressure
10 202012-CMBXX-0033
11 202012-CMBXX-0034

有機伝導体の圧力効果
トンネル分光による高圧下物性測定法の開発

村田 惠三
本山 岳

大阪市立大学

Effect of pressure on the organic conductor
Development of high pressure measurement for

島根大学

Gaku Motoyama Shimane University

上床 美也

tunneling spectroscopy
12 202012-CMBXX-0035

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

上床 美也

13 202102-CMBXX-0049

4Gにおける共同利用推進

佐藤

東北大学

Research and Support of General-Use at 4G

Taku J Sato

Tohoku University

眞弓 晧一Tohoku University

眞弓 晧一Ibaraki University

眞弓 晧一Tohoku University

眞弓 晧一Okayama University

近藤 猛

卓

Daisuke
14 202102-CMBXX-0050

4Gにおける共同利用推進

奥山

大輔

東北大学

Research and Support of General-Use at 4G
Okuyama

15 202102-CMBXX-0056

4Gにおける共同利用推進

横山

淳

茨城大学

Research and Support of General-Use at T1-1

MakotoYokoyama
16 202102-CMBXX-0071

17 202012-CMBXX-0010

4Gにおける共同利用推進

高分解能光電子分光による強相関物質の研究

坂倉

輝俊

横谷 尚睦

東北大学

岡山大学

Research and Support of General-Use at T2-2 andTerutoshi

T1-3

Sakakura

ultra-high resolution study on strongly correlated

Takayoshi

materials

Yokoya18 202012-CMBXX-0011

有機化合物の光電子分光

金井 要

東京理科大学

Photoemission study on organic compounds

Kaname Kanai

Tokyo University of Science近藤 猛

19 202012-CMBXX-0018

トポロジカル超伝導体の探索

坂野 昌人

東京大学

Search for topological insulators

Masato Sakano

The University of Tokyo

近藤 猛

105

レーザースピン角度分解光分光による表面電子状
20 202012-CMBXX-0043

SARPES studies of atomic layer materials at
矢治 光一郎物質・材料研究機構

National Institute for Materials
Koichiro Yaji

態の研究

surfaces近藤 猛
Science

The development of time-resolved photoemission
21 202012-CMBXX-0016

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Kyoko Ishizaka

The University of Tokyo

Takahiro

RIKEN Center for Emergent

Shimojima

Matter Science

Operando analysis of the electronic structure of

Naoka

National Institute for Materials

actual devices by 3DnanoESCA

Nagamura

Science岡﨑 浩三

using 60eV laser
理化学研究所
22 202012-CMBXX-0042

鉄系超伝導体のレーザー光電子分光

創発物性科学研

下志万 貴博

Laser-ARPES on Fe superconductor
究センター

23 202012-CMBXX-0002

三次元nanoESCAによる実デバイスのオペランド電
永村 直佳

物質・材料研究機構

子状態解析

岡﨑 浩三

原田 慈久
Construction of a noble system for circular and

24 202012-CMBXX-0006

軟Ｘ線発光・共鳴非弾性散乱分光の磁気円・線二菅 滋正

大阪大学産業科学研究所

linear dichroism in soft X-ray emission and RIXS

色性測定システムの構築

25 202012-CMBXX-0007

高分解能光電子分光による酸化バナジウムの研究

Shigemasa Suga ISIR, Osaka University

原田 慈久

spectroscopy
藤原 秀紀

大阪大学

Study on vanadium oxides by high resolution

Hidenori

Photoemission

Fujiwara

Osaka University

原田 慈久

National Institutes of Natural
26 202012-CMBXX-0044

不均一触媒反応のオペランド光電子分光測定

小板谷 貴典自然科学研究機構

分子科学研

Operando photoelectron spectroscopy of究所

27 202012-CMBXX-0045

偏光制御型軟X線分光装置の開発

平田 靖透

Takanori Koitaya Sciences, Institute for Molecular
heterogeneous catalysts
Developing a system for the polarization-controlled
防衛大学校

松田 巌

ScienceYasuyuki Hirata
soft X-ray spectroscopy

National Defense Academy of
松田 巌
Japan
Tohoku University, International

28 202012-CMBXX-0047

雰囲気光電子分光装置の高度化

山本 達

東北大学

国際放射光イノベー
Updates of the NAP-XPS machine

ション・スマート研究センター

29 202104-CMBXX-0073

ESM-RISM法を実装したQuantum ESPRESSOの高度

30 202108-CMBXX-0147

光スピントロニクスに向けたスピン軌道ダイナミ

Yamamoto

計算科学研究セン

Center for Synchrotron

松田 巌

Radiation Innovation Smart
Improvement of Quantum ESPRESSO

Satoshi

Tsukuba University, Center forター

implementing the ESM-RISM method

Hagiwara

Computational Sciences

黒田 健太

広島大学

Studying spin-orbit dynamics for opt-spintronics

Kenta Kuroda

Hiroshima University

氏名

所属

Title

Name

Organization

萩原 聡
化

筑波大学

Susumu

川島

直輝

近藤 猛

クスの研究

一般課題 / General Research Project
Member of research
No. 課題番号

課題名

分担者

担当所員
project

双性イオン型新規中性ラジカル分子結晶の磁性・
1 202012-GNBXX-0045

Elucidation of magnetic and electrical properties of
上田 顕

熊本大学

末棟 太朗

電気伝導性の解明
2 202012-GNBXX-0075

高配向機能性分子層の合成によるプロトン−電子
加藤 浩之

大阪大学

Study of proton-electron correlated bilayers by
棟安 陸

相関二分子膜の探求
3 202012-GNBXX-0030

重い電子系希土類化合物における異方的量子臨界

Akira Ueda

Kumamoto University

Taro Suemune

森 初果

Hiroyuki S. Kato

Osaka University

Riku Muneyasu

森 初果

Yohei Kono

Chuo University

Shunichiro Kittaka

山下 穣

Yusei Shimizu

Tohoku University

Shiro Kambe

Yamagata University

novel zwitterionic neutral radical crystals

synthesis of highly oriented functional monolayer
河野 洋平

中央大学

Magnetic properties of anisotropic quantum critical

橘高 俊一郎現象の磁気的評価

phenomena in a heavy-fermion metal
Magnetization and thermal expansion

4 202012-GNBXX-0074

アクチナイド系スピン三重項超伝導体における極

清水 悠晴

東北大学

measurements for actinide spin-triplet

低温磁化・熱膨張・磁歪測定5 202012-GNBXX-0068

二次元銅酸化物のホール係数測定IV

山下 穣

superconductors
神戸 士郎

山形大学

川村 桂太

Hall coefficient measurement of 2D cuprates (IV)106

Keita Kawamura

勝本 信吾

Evaluation of structural and electronic states using
真空転写法により形成したツイストグラフェンの6 202011-GNBXX-0010

Visikovskiy Anton
田中 悟

九州大学

Visikovskiy Anton

STM/STS of twisted graphene fabricated bySatoru Tanaka

Kyushu University

STM/STSによる構造・電子状態評価

長谷川 幸雄Kyushu University

vacuum transfer technique
Takumi Ouchi
7 202012-GNBXX-0065

Si(110)3×2-Bi表面の原子構造

中辻 寬

東京工業大学大内 拓実

Atomic structure of Si(110)3×2-Bi surface

Kan Nakatsuji

Tokyo Institute of Technology

Tokyo Institute of

長谷川 幸雄Technology
8 202012-GNBXX-0086

超伝導ダイアモンド薄膜ー強磁性薄膜接合系の超吉田 靖雄

Low-temperature STM study on a ferromagnet金沢大学

伝導および磁性の直接観察

Yasuo Yoshida

Kanazawa University

clusters on the substrate and elucidation of the

Noriyuki

National Institute of Technology,

relation between the cluster structure and its

Tsukahara

Gunma College

Kan Nakatsuji

Tokyo Institute of Technology

長谷川 幸雄superconducting diamond hybrid system
Establishment of selection method for atomic

9 202011-GNBXX-0021

基板での原子クラスター構造選別法の確立と, ク
塚原 規志

群馬工業高等専門学校

ラスター構造と磁性の関係の解明

吉信 淳
magnetic properties

10 202012-GNBXX-0064

微傾斜Si(111)√3×√3-B基板上に成長したBi(110)中辻 寬

東京工業大学

超薄膜の電子状態

大内 拓実

Electronic structure of Bi(110) thin films grown on

小森 文夫

vicinal Si(111)√3×√3-B substrates

窒素吸着Cu(001)表面におけるBi薄膜の成長と電子
中辻 寬

東京工業大学状態

12 202011-GNBXX-0002

Kei Nagatomo
Growth process of Bi thin-film on nitrogen adsorbed

森井 七生

群馬大学

Kan Nakatsuji

Tokyo Institute of Technology

Cu(001) surface and its electronic structure
小森 文夫

D-luciferin類似体を用いた絶対発光スペクトル測定 樋山 みやび

吉信 淳
Fumio Komori

永友 慶
11 202012-GNBXX-0066

Takumi Ouchi

Study for absolute emission spectra of D-luciferin
高橋 由太翔Morii Nanao

吉信 淳

Fumio Komori
Miyabi Hiyama

Gunma University

Takahashi Yutaka

秋山 英文Miyabi Hiyama

Gunma University

Kudo Yuto

秋山 英文

Miyabi Hiyama

Gunma University

Katsumi Keita

秋山 英文

analog
13 202011-GNBXX-0003

DEACM-ケージドルシフェリンの光解離における樋山 みやび群馬大学

Study for photocleave wavelength of DEACM
工藤 優斗

高効率波長の調査
14 202011-GNBXX-0004

新奇ケージド化合物の分光的特性の研究

caged D-Luciferin
樋山 みやび群馬大学

Study of spectroscopic property for a new caged
勝見 渓太
compoundSurface orientation dependence of biexciton
15 202012-GNBXX-0023

窒素デルタドープGaAs中の等電子トラップによる
矢口 裕之

埼玉大学

励起子分子発光の面方位依存性

16 202012-GNBXX-0012

Si基板上L10規則型CoPtナノロッドの磁化測定

高宮 健吾
emission from isoelectronic traps in N delta-doped
矢野 裕子

山浦 淳一

東京工業大学遠山 諒

Magnetization measurement of L10-ordered CoPt

真島 豊

nanorods on Si substrates

東京農工大学

リチウムインターカレートされた欠損型スピネル

Search for a spin-orbit-coupled metallic phase in
東京農工大学におけるスピン軌道結合金属相の探索
岡本 佳比古19 202012-GNBXX-0058

横山 泰範

Yuya Haraguchi

Tokyo University of Agriculture

Yoshihiko Okamoto
actuator materials by control of rare earth 4f

竹中 康司
electron number

Junya Shibutani
Nagoya University

Yokoyama(Ce1-xRx)PtGe2の置換および圧力効果

中野 智仁

新潟大学

広井 善二
Koshi Takenaka

岸田 海斗
20 202012-GNBXX-0016

広井 善二
and Technology

Yasunori

名古屋大学

エーター材料の創製

広井 善二
and Technology

Development of novel volume-change-driven
渋谷 隼矢

広井 善二

Tokyo University of Agriculture

lithium-Intercalated lacunar spinels

希土類4f電子数制御による新規体積変化アクチュ

秋山 英文

Yutaka Majima

excitonic honeycomb lattice magnet
原口 祐哉

Ryo Toyama

Yuya Haraguchiの物性
18 202012-GNBXX-0036

Junichi Yamaura Tokyo Institute of Technology
Physical properties in candidates of van Vleck

原口 祐哉

Kengo Takamiya
Yuko Yano
GaAs

ハニカム格子系van Vleckエキシトン磁性候補物質
17 202012-GNBXX-0035

Hiroyuki Yaguchi Saitama University

Kishida Kaito

武藤 颯人

Substitution and pressure effect of (Ce1-xRx)PtGe2

Tomohito
Niigata University
NakanoHayato Muto
上床 美也
Niigata University
Kiyoharu Uchima,

21 202012-GNBXX-0020

CeNiC2の結晶育成と物質評価

繁岡 透

山口大学

内間 清晴（沖縄キリスト教短期大学）

Crystal growth and characterization of CeNiC2

Toru Shigeoka

Yamaguchi University

Okinawa Christian JuniorCollege

107

上床 美也

22 202012-GNBXX-0025

圧力媒体の高圧力物性

村田 惠三

大阪市立大学High Pressure Properties of High Pressure Medium

Keizo Murata

Osaka City University

上床 美也

Central Institute of
九州大学アイソトープ統合安全23 202012-GNBXX-0029

ウラン化合物の磁性の圧力効果

本多 史憲

Effect of Pressure on the magnetism of uranium
小泉 尭嗣（東北大学）

管理センターRadioisotope Science and

Takatsugu Koizumi,

Safety Management, Kyushu

Tohoku university

Fuminori Honda
compounds

上床 美也
University

Investigation of valence transition on Eu
24 202012-GNBXX-0031

高圧下におけるEu化合物の価数転移の探索

本多 史憲

東北大学

小泉 尭嗣（東北大学）

Fuminori Honda Tohoku university

Takatsugu Koizumi

上床 美也

Masahiko HIROI Kagoshima University

Kouki Akaishi

上床 美也

Naoki Fujiwara

Zhongyu Yu

上床 美也

Kiyotaka Mukasa The University of Tokyo

Okada Ko

上床 美也

Yusuke Hirose

Niigata University

Shun Tsuchida

上床 美也

Yoshiya Adachi

Yamagata University

Yuino Ida

上床 美也

Masahiro Shinozaki

上床 美也

compounds under high pressure
25 202012-GNBXX-0038

ホイスラー化合物Fe3-xMnxSiの圧力下磁気相転移

廣井 政彦

鹿児島大学

Magnetic phase transitions under pressure in
赤石 幸起
Heuser compounds Fe3-xMnxSi
26 202012-GNBXX-0043

S置換したFeSeの高圧低温NMR測定

藤原 直樹

京都大学

NMR studies on S-substituted FeSe at highYu Zhongyu

Kyoto University

pressures and low temperatures
27 202012-GNBXX-0044

Ba1-xRbxFe2As2における圧力下電子相図の研究

向笠 清隆

東京大学

Studies on high-pressure phase diagrams in Ba1岡田 昂
xRbxFe2As2
28 202012-GNBXX-0047

Ta2NiSe5 の置換物質における高圧力下電気抵抗測

広瀬 雄介

新潟大学

Electrical resistivity measurement under pressure of

土田 駿

定29 202012-GNBXX-0050

Ni2In型強磁性体の自発磁化の圧力効果

substituted Ta2NiSe5
安達 義也

山形大学

Pressure effects on the spontaneous magnetization
井田 唯斗
for Ni2In-type ferromagnets.
30 202012-GNBXX-0051

Ceジグザグ鎖を持つCe3TiSb5およびCe3TiBi5の圧
本山 岳

島根大学

Electrical resistivity measurements of Ce3TiSb5 and篠﨑 真碩

力下電気抵抗測定

Gaku Motoyama Shimane University
Ce3TiBi5 under pressure
Search for pressure-induced superconductivity and

超高圧下電気抵抗測定による反強磁性絶縁体λ31 202012-GNBXX-0061(BEST)2FeCl4の温度圧力相図の決定と圧力誘起超

小林 拓矢
谷口 弘三

埼玉大学

伝導相の探索Takuya Kobayashi
determination of the pressure-temperature phase

齋藤 陸丸（北海道大学） diagram of antiferromagnetic insulator λ小梁川 響子

Hiromi Taniguchi Saitama University

Saito Rikumaru, Hokkaido

上床 美也

University(BEST)2FeCl4 by electrical resistivity measurement
Kyoko Koyanagawa
under ultra-high pressures
Hiromi Taniguchi
谷口 弘三
32 202012-GNBXX-0063

有機電荷移動錯体(DMET-TTF)2AuBr2の超高静水圧
小林 拓矢

埼玉大学

印加による超伝導相の探索

Search for pressure-induced superconductivity by加藤 大賀（北海道大学） applying quasi-hydrostatic ultra-high pressures to菅原 佳哉

organic charge-transfer salt (DMET-TTF)2AuBr2

TakuyaSaitama University
Kobayashi

Taiga Kato, Hokkaido
上床 美也
University
Yoshiya Sugawara

Fermi surface study of superconductors with
33 202012-GNBXX-0069

圧力誘起構造量子相転移を示す超伝導体のフェル
摂待 力生

新潟大学

三橋 大貴

pressure-induced structural quantum phase

ミ面の研究

34 202012-GNBXX-0080

35 202012-GNBXX-0081

36 202012-GNBXX-0082

37 202012-GNBXX-0083

38 202012-GNBXX-0084

CeZn2Ge2単結晶の高圧化磁化測定

GdCrGe2単結晶の磁化測定

TbCrGe2単結晶の磁化測定

HoCrGe2単結晶の磁化測定

重い電子系強磁性体の圧力下dHvA効果

Rikio Settai

Niigata University

Daiki Mitsuhashi

上床 美也

Yamaguchi University

Rei Gotanda

上床 美也

Yamaguchi University

Ryohei Kobayashi

上床 美也

Yamaguchi University

Kaneko Tatsuya

上床 美也

Yamaguchi University

Shizuru Sugita

上床 美也

Niigata University

Daiki Mitsuhashi

上床 美也

transition
藤原 哲也

藤原 哲也

藤原 哲也

藤原 哲也

摂待 力生

山口大学

山口大学

山口大学

山口大学

新潟大学

Magnetization measurements under high pressures Tetsuya
五反田 礼
of CeZn2Ge2 single crystal

Fujiwara

Magnetization measurements of GdCrGe2 single

Tetsuya

crystal

Fujiwara

Magnetization measurements of TbCrGe2 single

Tetsuya

crystal

Fujiwara

Magnetization measurements of HoCrGe2 single

Tetsuya

crystal

Fujiwara

小林 遼平

金子 達哉

杉田 静留

de Haas-van Alphen effect in heavy fermion

三橋 大貴

ferromagnet under pressure

108

Rikio Settai

Studies on nanostructured metals by ultrafast
39 202011-GNBXX-0005

金属ナノ構造の超高速発光による研究

末元 徹

電気通信大学

The University of ElectroSuemoto Tohru

luminescence spectroscopy

小林 洋平
Communications
Yuki Shiba

Research on laser processing application by
40 202012-GNBXX-0019

紫外光レーザー光源を用いた加工応用研究藤本 靖

千葉工業大学

Yasushi

柴 優希

Chiba Institute of Technology
ultraviolet laser light source

Chiba Institute of小林 洋平

Fujimoto
Technology

高田 英行

Takada Hideyuki

奈良崎 愛子Aiko Narazaki

小川 博嗣
41 202012-GNBXX-0032

42 202012-GNBXX-0056

次世代レーザーとレーザー加工の基礎技術研究

SmSの高強度中赤外パルス光を用いた光誘起相転

吉富 大

渡邊 浩

産業技術総合研究所

大阪大学

移ダイナミクス
43 202012-GNBXX-0041

有機分子/貴金属界面におけるラシュバ分裂の増金井 要

東京理科大学

National Institute of Advanced
寺澤 英知

Basic research on next generation laser systems and澁谷 達則

laser machining technology

Dai Yoshitomi

Industrial Science andTechnology

Daisuke Satoh
Ryunosuke Kuroda

田中 真人

Masahito Tanaka

中村 拓人

High power mid-infrared laser induced phase

Hiroshi陳 奕同transition dynamics on SmS

Watanabe

Enhancement of Rashba splitting on organic
小久保 裕太Kaname Kanai

Osaka University

小林 洋平

Tatsunori Shibuya

黒田 隆之助Takuto Nakamura

板谷 治郎

Yitong Chen
Tokyo University of Science

Yuta Kokubo

近藤 猛

molecule/noble metal interface
松永 和也

Ti3SiC2のスピン分解角度分解光電子分光

Eichi Terasawa

佐藤 大輔

大

44 202012-GNBXX-0048

Hiroshi Ogawa

伊藤 孝寛

名古屋大学

Matsunaga Kazuya

山本 凌

Spin- and Angle-resolved photoemission study of杉本 卓史

Ti3SiC2

Takahiro Ito

Nagoya University

Yamamoto Ryo

近藤 猛

Takafumi Sugimoto

保科 拓海

Hoshina Takumi
Unveiling of the electronic state of the Wyel semi-

45 202012-GNBXX-0053

超高品質4d強磁性酸化物SrRuO3薄膜におけるワイ
小林 正起

東京大学

ル半金属相の電子状態の解明

武田 崇仁
metal phase in ultra-high quality 4d ferromagnetic
岡野 諒

oxide SrRuO3 thin films

Masakithe University of Tokyo
Kobayashi

Takahito Takeda
近藤 猛
Ryo OkanoMany-body interaction of half-metallic
46 202012-GNBXX-0054

バルク敏感高分解能スピン分解光電子分光を用い
横谷 尚睦

岡山大学

片岡 範行

たハーフメタル強磁性体の多体効果の研究

antiferromagnet studied by bulk sensitive high-Takayoshi

resolution spin-resolved photoemission

YokoyaOkayama University

Noriyuki Kataoka

近藤 猛

Naoka Nagamura

近藤 猛

spectroscopy
スピン角度分解光電子分光によるガリウム単結晶
47 202012-GNBXX-0070

Electronic band structure of Ga single crystal studied
矢治 光一郎物質・材料研究機構

永村 直佳
by SARPES

48 202012-GNBXX-0042

橋本 顕一郎

東京大学

超伝導体の電子ネマティック状態の実空間観察Ⅲ

ScienceReal-space observation of electronic nematicity in水上 雄太
高分解能レーザー励起光電子顕微鏡を用いた鉄系

National Institute for Materials
Koichiro Yaji

表面の電子状態研究

iron-based superconductors by using a high大西 朝登

Yuta Mizukami
Kenichiro
the University of Tokyo

resolution laser photoemission electron microscope Hashimoto
影山 遥一

Asato Onishi

岡﨑 浩三

Yoichi KageyamaⅢ

49 202012-GNBXX-0055

時間角度分解光電子分光による価数揺動物質の光

中村 拓人

大阪大学

誘起相転移ダイナミクス
50 202012-GNBXX-0060

励起子絶縁体の原子層結晶における電子正孔相関
溝川 貴司

早稲田大学

渡邊 浩

Photo-induced phase transition dynamics on the

Takuto陳 奕同

valence fluctuate compound by TrARPES

Nakamura

Photoinduced dynamics of electron-hole correlation Takashi
大川 万里生の光誘起ダイナミクス

in atomic layered excitonic insulators

Osaka University

Hiroshi Watanabe

岡﨑 浩三

Yitong Chen
Waseda University

Mario Okawa

岡﨑 浩三

Mizokawa

Investigation of the photo-induced phase
51 202012-GNBXX-0067

励起子絶縁体Ta2NiSe5及び高温超伝導体FeSeにお久保田 雄也

理化学研究所transitions in an exitonic insulator Ta2NiSe5 and a

ける光誘起相転移の研究
superconductor FeSe

109

Yuya Kubota

RIKEN

岡﨑 浩三

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

課題番号

課題名

氏名

所属

分担者

Title

Name

Organization

Member of research

実験室

project
泥岩中の化学的浸透に伴う岩石の変形に関する実1 202012-MCBXG-0040

Experimental and numerical investigation of rock
廣田 翔伍

東京大学

験的・数値的検討
2 202011-MCBXG-0001

金属間化合物の構造解析

Shogo Hirota

the University of Tokyo

Tetsuji Saito

Chiba Institute of Technology

齋藤 哲治

千葉工業大学

Study of intermetallic compounds
細野 暢彦

3 202012-MCBXG-0032

MOF を鋳型とした極細無機ナノワイヤーの創製

X線測定室

deformation caused by chemical osmosis

北尾 岳史

東京大学

電子顕微鏡室Nobuhiko Hosono

Synthesis of ultrathin inorganic nanowire templated
飯塚 知也

Takashi Kitao

the University of Tokyo

Tomoya Iizuka

電子顕微鏡室by MOFs
松田 一輝

Ikki Matsuda
Studies on phase-separated superconducting

交流磁化率測定による反強磁性絶縁体に近接した
4 202012-MCBXG-0031

層状有機超伝導体における相分離した超伝導相の

谷口 弘三

埼玉大学

phase in layered organic superconductors
高橋 啓太

Takahashi Keita
Hiromi Taniguchi Saitama University

電磁気測定室bordering on antiferromagnetic insulating phase by研究
ac susceptibility measurements
5 202012-MCBXG-0039

新規スピン軌道結合磁性体の物性評価

香取 浩子

東京農工大学

原口 祐哉

Characterization of novel spin-orbit coupled柿本 和勇

magnetic materials

Hiroko Katori

Tokyo University of Agriculture

Yuya Haraguchi

and Technology

Kazuo Kakimoto

電磁気測定室Shinji Nakai
6 202011-MCBXG-0013

六方晶フェライトSrCo2-Wの磁気異方性制御

和氣 剛

京都大学

Controlling the magnetic anisotropy of the

中井 慎司

Takeshi Waki

Kyoto University

Chihiro Sekine

Muroran Institute of Technology

Hiroyuki Kagi

the University of Tokyo

高圧合成室

hexaferrite SrCo2-W

High-pressure synthesis of new rare-earth and7 202012-MCBXG-0007

希土類元素およびアルカリ土類金属元素を充填し関根 ちひろ室蘭工業大学本間 さくらalkaline-earth filled skutterudite-type thermolectric

た新規スクッテルダイト型熱電材料の高圧合成

Sakura Homma
高圧合成室materials
Solubility and site occupancy of hydrogen in Fe-Si
高温高圧中性子回折測定を用いた鉄−ケイ素系で
8 202012-MCBXG-0042

鍵 裕之

森 悠一郎

system using in-situ neutron diffraction

磯部 隆仁

measurement under high pressure and high東京大学の水素原子のサイト決定と溶存量の測定

Mori Yuichiro
高圧合成室
Ryuto Isobe

temperature
高圧合成室、X
9 202011-MCBXG-0006

α-RuBr3の高圧合成

今井 良宗

東北大学

藤原 秀行

High pressure synthesis of α-RuBr3

Yoshinori Imai

Tohoku university

Hideyuki Fujihara
線測定室

車地 崇

Takashi Kurumaji

池田 凜太郎Rintaro Ikeda

木村 真栄

Shin-Ei Kimura

佐藤 樹
10 202012-MCBXG-0030

11 202012-MCBXG-0017

磁気多極子の強的秩序に基づく物質機能の開発

カルシウムループ法によるメタン化プロセスの研

有馬 孝尚

大友 順一郎

東京大学

東京大学

Tatsuki Sato

海本 祐真

Development of material functions based on ferroic

渡辺 義人

multipole orderTaka-hisa Arima the University of Tokyo

Yuma Umimoto

X線測定室

Yoshito Watanabe

電磁気測定室柳田 真佑

Shinsuke Yanagida

石崎 大悟

Daigo Ishizaki

徳永 祐介

Yusuke Tokunaga

厳 正輝

Masaki Gen
Development of Ca looping process for production

李 智漢

究

of methane

110

Junichiro Otomo the University of Tokyo

Jihan Lee

X線測定室
電子顕微鏡室Improvement of solid-oxide electrolysis cells
イオン及び電子伝導特性の制御によるSOEC性能の12 202012-MCBXG-0018

大友 順一郎東京大学

Ortiz Julian

performance by controlling ionic and electronic

Julian Andres Ortiz

X線測定室

Corrales

電子顕微鏡室Junichiro Otomo the University of Tokyo

改善
transport properties
Control of interfacial transport properties of ionイオン・電子混合電解質の界面輸送特性制御と新13 202012-MCBXG-0019

Tajima Seiya
大友 順一郎

東京大学

田島 星也

electron mixed electrolytes and design of new

Junichiro Otomo the University of Tokyo

X線測定室

規電気化学セル設計
electrochemical cells
14 202012-MCBXG-0020

プロトン伝導性固体電解質膜の異相接合界面にお大友 順一郎東京大学

Study of the transport phenomenon at
中根 健太

ける輸送現象の研究

Junichiro Otomo the University of Tokyo

Nakane Kenta

heterojunction of proton conductor

X線測定室
電子顕微鏡室Preparation of electrolytic cell for in-situ
15 202012-MCBXG-0021

赤外分光法を用いた反応吸着種のその場測定用電大友 順一郎東京大学

measurement of reaction adsorbed species and平子 睦海

解セルの作製とCO2吸着種の反応追跡

Junichiro Otomo the University of Tokyo

Mutsumi Hirako

Junichiro Otomo the University of Tokyo

Rui Huang

X線測定室

observation of CO2 adsorbed species using
infrared spectroscopy

16 202012-MCBXG-0022

プロトン伝導形燃料電池を用いた二酸化炭素の電大友 順一郎東京大学

Electrolytic reduction of carbon dioxide using
黄睿

解還元
17 202012-MCBXG-0036

18 202012-MCBXG-0037

in-situ生成触媒を用いた連続式超臨界水ガス化プロ

proton-conducting fuel cells
布浦 鉄兵

東京大学

Continuous supercritical water gasification process
張鵬

セスの検討

using in-situ generation of catalyst

ニッケル触媒を用いた地溝油の水熱ガス化反応にHydrothermal gasification of hogwash oil using
布浦 鉄兵

東京大学

温 雅茹

関する検討

19 202011-MCBXG-0004

ける水素生産のための2段階接触分解装置と改質装
置の開発

電子顕微鏡室Teppei Nunoura the University of Tokyo

Peng Zhang

Development of a two-stage catalytic cracker andグバタンガ ダイ

reformer for hydrogen production in supercritical
東京大学

アン

water gasification of biomass with high lipid

X線測定室
電子顕微鏡室Teppei Nunoura the University of Tokyo

Yaru Wennickel catalyst

高脂質含有量のバイオマスの超臨界水ガス化にお

X線測定室

X線測定室
電子顕微鏡室
Diane
Valenzuela

X線測定室
the University of Tokyo

電子顕微鏡室Gubatanga

光学測定室

content
20 202012-MCBXG-0034

合金ナノ粒子のキャラクタリゼーション

佐々木 岳彦東京大学

張 凱朝Characterization of alloy nanoparticles

Takehiko Sasaki the University of Tokyo

Kaichao Zhang

X線測定室
電子顕微鏡室
塩見 学
21 202012-MCBXG-0015

電子不足型量体化分子の内部構造の解明

片山 尚幸

名古屋大学

小島 慶太
原 武史

Elucidation of the internal structure of electron-

Naoyukideficient dimerized molecules

Katayama

Nagoya University

松田 悠大
22 202012-MCBXG-0016

量体化直前の金属における圧力誘起相転移の探索

片山 尚幸

名古屋大学

塩見 学
小島 慶太

Search for pressure-induced phase transitions in

Naoyukimetals just before dimerization

Katayama

Nagoya University

Manabu Shiomi

化学分析室

Keita Kojima

X線測定室

Takeshi Hara

電磁気測定室Matsuda Yudai

化学分析室

Manabu Shiomi

X線測定室

Keita Kojima

電磁気測定室
化学分析室

超臨界水熱合成法を利用したZrO2微粒子のその場
23 202012-MCBXG-0010

In-situ organic modification of ZrO2 nanoparticles
秋月 信

東京大学

李雪

Makoto Akizuki

有機修飾技術の研究

the University of Tokyo

Li Xueusing supercritical hydrothermal method

X線測定室
電子顕微鏡室化学分析室

24 202012-MCBXG-0011

超臨界水を用いたペロブスカイト構造金属酸化物
秋月 信

東京大学

Synthesis of perovskite structure metal oxide
朱 崢琿

微粒子の合成Makoto Akizuki

the University of Tokyo

Zhenghui Zhu

nanoparticles using supercritical water

X線測定室
電子顕微鏡室Synthesis of highly crystalline BaZrO3 nanoparticles
25 202012-MCBXG-0012

超臨界水と亜臨界水の二段階反応による結晶性の

秋月 信

東京大学

王 咏旭

by a two-step reaction of supercritical water and

Makoto Akizuki

the University of Tokyo

高いBaZrO3ナノ粒子の合成

Yongxu Wang

X線測定室
電子顕微鏡室subcritical water
26 202012-MCBXG-0024

幾何学的フラストレート格子を持つキタエフ・ハ

原口 祐哉

Study of Physical Properties of Kitaev-Heisenberg

東京農工大学

イゼンベルグ磁性体の物性研究

Magnets with Geometric Frustrated Lattice111

Yuya Haraguchi

Tokyo University of Agriculture
and Technology

電磁気測定室三角格子反強磁性体ACrS2 (A = Ag, Au)の磁場誘起
27 202012-MCBXG-0028

岡本 佳比古Magnetostriction in Triangular Antiferromagnet

Yoshihiko

ACrS2 (A = Ag, Au)

Okamoto名古屋大学

Nagoya University

歪電磁気測定室
X線測定室

28 202012-MCBXG-0033

キラルな無機蛍光体単結晶の育成

木崎 和郎

生産技術研究所

Single Crystal Growth of Chiral Inorganic Phosphors Kazuro Kizaki

Institute of Industrial Science
物質合成質室今村 薫平

Kumpei Imamura

原澤 龍平

Ryuhei Harasawa

向笠 清隆

Kiyotaka Mukasa

石原 滉大29 202012-MCBXG-0035

30 202012-MCBXG-0008

トポロジカル超伝導体の新規物質開発と物性評価

新規フェロイック秩序物性の創成に関する研究

水上 雄太

木村 剛

東京大学

東京大学

Kota Ishihara

影山 遥一

Synthesis and characterization of novel topological

広瀬 夏彦

superconductors

Yuta Mizukami

the University of Tokyo

Yoichi Kageyama
Natsuhiko Hirose

岡田 昂

Okada Ko

六本木 雅生

Masaki Roppongi

大西 朝登

Asato Onishi

ファン センジェ

Shengjie Fang

林 悠生

Yuki Hayashi

大島 貴彦

Takahiko Oshima

林田 健志
Exploration of new ferroic properties

Tsuyoshi Kimura the University of Tokyo

Takeshi Hayashida

荒川 慶人

Keito Arakawa

木村 健太

Kenta Kimura

三澤 龍介

Ryusuke Misawa

物質合成質室
X線測定室
電磁気測定室物質合成質室
X線測定室
電子顕微鏡室物質合成・評価設備Uクラス / Materials Synthesis and Characterization U Class Research Project
No.

課題番号

課題名

氏名

所属

分担者

Title

Name

Organization

Member of research

担当所員

project
酒井 明人

Akito Sakai

王 陽明Yangming Wang

Fu Mingxuan

Fu Mingxuan

見波 将
1 202104-MCBXU-0048

新規量子マテリアルの単結晶合成

中辻 知

Single crystal growth of new quantum matter

Satoru Nakatsuji the University of Tokyo

2 202104-MCBXU-0051

田中 聖也

Hiroto Nakamura

Ray Mayukh Kumar

Ray Mayukh Kumar

Feng Zili

Feng Zili

Laser alumina reduction toward utilization of lunar

田中 直輝

resources

プロトン伝導型固体セルと電気化学反応器の開Keita Nishii
Seiya Tanaka

the University of Tokyo

電子顕微鏡室Naoki Tanaka

Development of solid proton-conducting cells and
中温作動のアンモニア電解合成システムに向けた
3 202105-MCBXU-0052

電子顕微鏡室Nan Tang

西井 啓太
東京大学

元

化学分析室

中村 紘人

唐楠
月資源利用を目指したレーザーによるアルミナ還物質合成質室Susumu Minami

東京大学

岡﨑 萌

electrochemical reactors for an ammonia
東京大学

Moe Okazaki

the University of Tokyo

X線測定室

Shun Yamate

the University of Tokyo

X線測定室

electrosynthesis system operating at intermediate
発temperatures
Fabrication of Porous Metal Supported Proton
4 202105-MCBXU-0053

多孔金属支持型プロトン伝導性セラミックス燃料

山手 駿

東京大学

Conducting Fuel Cells and Evaluation of Physical

電池の作製および物性評価

Properties

112

国際超強磁場科学施設 / International MegaGauss Science Laboratory
No.

課題番号

課題名

氏名

所属

分担者

Title

Name

Organization

Member of research

担当所員

project
Relationship between unconventional
1 202012-HMBXX-0004

重い電子系化合物が示す非従来型超伝導と非フェ

横山 淳

茨城大学

平山 堅理

superconductivity and non-Fermi-liquid state in

ルミ液体状態の相関

MakotoIbaraki University

Takatoshi Hirayama

金道 浩一

Yokoyama
heavy-fermion compounds
Observation of preformed Cooper pairing in high-

2 202012-HMBXX-0009

パルス強磁場中c軸抵抗率測定による銅酸化物高温
渡辺 孝夫

弘前大学

藤井 武則（東京大学）

超伝導体における前駆クーパー対形成の検証

Tc cuprates using out-of-plane resistivity

Takao
Hirosaki University

measurements of Bi(Pb)-2212 single crystals under Watanabe

Takenori Fujii, the
金道 浩一
University of Tokyohigh pulsed magnetic fields
Magnetic-field control of phase transitions and3 202012-HMBXX-0014

中性イオン性物質における相転移の磁場制御と磁
福岡 脩平

北海道大学

伊藤 悠馬

search for magnetoresistance phenomena in

Shuhei Fukuoka

Hokkaido University

Ito Yuma
金道 浩一

気抵抗現象の探索
neutral-ionic materials
CeAgxCu1-xSb2の磁気相図と新規遍歴電子フラス
4 202012-HMBXX-0018

トレーション系における強磁場磁化過程に関するStudy of the magnetic phase diagram in CeAgxCu1道岡 千城

京都大学

森山 広大

xSb2 and magnetization curves in novel itinerantMichioka

Kyoto University

Kodai Moriyama

金道 浩一

Tohoku university

Hideyuki Fujihara

金道 浩一

Yatsuzuka Hayato

金道 浩一

Chishiro
研究5 202012-HMBXX-0020

α-Ru(Br,Cl)3の磁場配向試料の作製と強磁場磁化過frustrated systems
今井 良宗

東北大学

Preparation of magnetically oriented α- Ru(Br,Cl)3

藤原 秀行

程の測定
6 202012-HMBXX-0021

フラストレートしたハニカム格子磁性体における
原口 祐哉

東京農工大学

Search for novel magnetic field-induced phases in
八束 波椰斗新奇磁場誘起相の探索
7 202012-HMBXX-0023

Yoshinori Imaiand high-field magnetization measurements
Yuya Haraguchi
frustrated honeycomb lattice magnets

有機超伝導体のFFLO超伝導相に対する乱れの効果 杉浦 栞理

Disorder effect on FFLO superconductivity of東北大学

Tokyo University of Agriculture
and Technology
Shiori Sugiuraorganic superconductors

Institute for Materials Research,
金道 浩一
Tohoku University

Magnetic and transport properties under high
高圧合成新規希土類ホウ化物RB12（R=Ce, Pr, Nd）
8 202012-HMBXX-0034

magnetic field of novel rare-earth dodecaborides
伊賀 文俊

茨城大学

山田 健介

Fumitoshi IgaとErB6の強磁場磁化と輸送特性

Ibaraki University

Kensuke Yamada

金道 浩一

RB12（R=Ce, Pr, Nd）and ErB6 prpduced by highpressure synthesis

ハニカム近藤格子系CePt6Al3におけるフラスト
9 202012-HMBXX-0003

レーション効果の強磁場磁化・抵抗測定による研Role of frustration in the honeycomb Kondo lattice
高畠 敏郎
鬼丸 孝博

広島大学

大石 遼平

Toshiro Takabatake
CePt6Al3 studied by magnetization and

Takahiromagnetoresistance measurements in highOnimaru究

志村 恭通

新規スピン軌道結合モット絶縁体の強磁場磁化過

原口 祐哉

Magnetization process of novel spin-orbit coupled柿本 和勇

Mott insulators in high magnetic fields

Hiroshima university

Oishi Ryohei

徳永 将史

Yasuyuki Shimura
magnetic fields

10 202012-HMBXX-0024

香取 浩子

東京農工大学程

Hiroko Katori

Tokyo University of Agriculture

Yuya Haraguchi

and Technology

Kazuo Kakimoto

徳永 将史

Observations of superconducting states in Fe(Te,S)
11 202012-HMBXX-0028

ヨウ素輸送法で育成したFe(Te,S) における超伝導矢口 宏

東京理科大学状態の磁気光学イメージングによる観測

山中 隆義
grwon by an iodine-transport method using an MO
藤川 俊樹

Hiroshi Yaguchi

Tokyo University of Science

Takayoshi Yamanaka
徳永 将史
Toshiki Fujikawa
imaging techniqueObservation of the distribution of superconductivity

12 202012-HMBXX-0032

鉄系超伝導体Fe(Te, Se)における超伝導空間分布の山中 隆義

東京理科大学

磁気光学イメージングによる観測

13 202012-HMBXX-0041

パルス強磁場を用いた Ni-Co-Mn-Sn 系合金のメ

矢口 宏
in Fe(Te, Se) using a magnet optical imaging
打川 景大

許皛

東北大学

technique
Metamagnetic transition behaviors in Ni-Co-Mn-Sn
宮川 寅矢

タ磁性相転移の実験的調査

alloys under pulsed high magnetic fields

113

Takayoshi
Tokyo University of Science
Yamanaka

Xiao Xu

Hiroshi Yaguchi
徳永 将史
Keita Uchikawa

Tohoku University

Tomoya Miyakawa

徳永 将史

強磁場中におけるクラスター磁気多極子に起因し14 202012-HMBXX-0044

Explorations of peculiar high-field behaviors due to
木村 健太

東京大学

た特異物性の探索
クロムスピネル酸化物におけるスピンネマティッ
15 202012-HMBXX-0008

Kenta Kimura

the University of Tokyo

徳永 将史

Shojiro Kimura

Tohoku University

小濱 芳允

cluster magnetic multipoles
Explorations of the spin nematic phase in the
木村 尚次郎

東北大学

ク相の探索

chromium spinel oxide
Shiori Sugiura, Tohoku
杉浦 栞理（東北大学）

16 202012-HMBXX-0026

有機スピン液体候補物質の超強磁場物性研究宮川 和也

Physical property measurements of organic spin

Kazuya東京大学

the University of Tokyo
浦井 瑞紀

liquid candidate materials under ultra-highMiyagawa

University

小濱 芳允

Mizuki Uraimagnetic field
Magneto-Optical Spectroscopy of Molecular
17 202103-HMBXX-0046

強磁場下における分子材料励起三重項状態の磁気
石井 和之

東京大学

Materials in the Excited Triplet States under Strong

光学分光

Kazuyuki Ishii

the University of Tokyo

Hideaki Sakai

Osaka University

小濱 芳允

Magnetic Fields
近藤 雅起
18 202104-HMBXX-0047

トポロジカル磁性体候補物質の量子振動の研究

酒井 英明

Study of the quantum oscillation of a putative
大阪大学

Masaki Kondo

徳永 将史

topological magnet

19 202104-HMBXX-0050

ブリージングパイロクロア格子磁性体の新規磁場
厳正輝

Search for novel field-induced properties and東京大学

誘起物性および機能性の開拓
20 202104-HMBXX-0051

新規スキルミオン候補物質Eu化合物における格子

Masaki Gen
functionalities in breathing pyrochlore magnets

車地 崇

東京大学

厳 正輝

歪みの研究

Department of Advanced
松田 康弘
Materials Science

Study of lattice distortions in a possible skyrmion

Takashihost Eu compound

Kurumaji

the University of Tokyo

Masaki Gen

小濱 芳允

Magnetic-field induced properties of 5d transition
21 202104-HMBXX-0052

異方的三角格子を組んだ5d遷移金属量子磁性体の
厳

正輝

東京大学

metal quantum magnets on the anisotropic

磁場中物性Masaki Gen

Department of Advanced
小濱 芳允
Materials Science
triangular latticeElectrical transport studies on Fe(Se, Te)

22 202106-HMBXX-0095

鉄系超伝導体Fe(Se, Te)のネマティック量子臨界点
芝内 孝禎

東京大学

近傍における輸送現象の研究

向笠 清隆
superconductors near the nematic quantum critical
劉 蘇鵬

point

Takasada
the University of Tokyo
Shibauchi

Kiyotaka Mukasa
金道 浩一
SUPENG LIU

大阪大学大学院理学研究科附属先端強磁場科学研究センター / Center for Advanced High Magnetic Field Science, Graduate School of Science, Osaka University
No.

課題番号

課題名

氏名

所属

分担者

Title

Name

Organization

Member of research
担当所員
project
Magnetic-field induced properties of 5d transition
1 202011-HMOXX-0001

空間反転対称性の破れや磁気フラストレーション
竹内 徹也

大阪大学

に誘発された特異な磁気特性と強磁場物性

2 202012-HMOXX-0010

マンガン窒化物Mn3XN (X= Cu, Sb)の磁化・磁歪の大貫 惇睦（理化学研究
所）

左近 拓男

metal quantum magnets on the anisotropic
triangular lattice
Research on time dependences of magnetization

龍谷大学

高速磁場応答性の研究

Tetsuya
Osaka University

Yoshichika Onuki, RIKEN

TakeuchiTakuo Sakon

萩原 政幸(大阪大学)
萩原 政幸
Ryukoku University

and magnetstriction of Mn3XN(X = Cu, Sb)(大阪大学)

Research on time dependences of magnetstriction
3 202012-HMOXX-0011

ホイスラー合金Ni2MnX(X = Al, Sb)およびPd2MnSn
左近 拓男

龍谷大学

of Ni2MnX(X = Al, Sb) type and Pd2MnSn typeの磁化・磁歪の高速磁場応答性の研究

4 202012-HMOXX-0012

量子スピン系の電場励起ESRと方向二色性

Takuo Sakon

萩原 政幸
Ryukoku University(大阪大学)
Heusler alloys
木村 尚次郎東北大学

Electric dipole active ESR and nonreciprocal
大月 保直

Shojiro Kimura

Tohoku University

Yasunao Otsuki

directional dichroism in quantum spin systems
5 202012-HMOXX-0015

ショートパルスマグネットを用いた圧力下ESR装置

櫻井 敬博

神戸大学

Development of high-pressure ESR system using

赤木 暢

の開発

short pulse magnet

114

萩原 政幸
(大阪大学)
Takahiro Sakurai Kobe University

Mitsuru Akaki

萩原 政幸(大阪大学)

強いスピン-軌道相互作用を活かした酸化物スピン
6 202012-HMOXX-0017

萩原 政幸
松野 丈夫

大阪大学

Oxide spintronics utilizing strong spin-orbit coupling Jobu Matsuno

Osaka University

トロニクス
7 202012-HMOXX-0025

トポロジカル磁性体の巨大磁気抵抗効果の研究(大阪大学)
村川 寛

High magnetic field study of giant

Hiroshimagnetoresistance in topological magnets

Murakawa

大阪大学

萩原 政幸
Osaka University(大阪大学)

奥田 裕貴

Yuki Okuda
Study of magnetic properties for layered magnet

8 202012-HMOXX-0035

層状磁性体EuMg2Bi2の磁気特性の解明

酒井 英明

大阪大学

近藤 雅起

萩原 政幸
Hideaki Sakai

Osaka University

EuMg2Bi2
阪口 駿也

Masaki Kondo
Shunya Sakaguchi(大阪大学)

Mitsuru Akaki
赤木 暢
9 202012-HMOXX-0039

Coスピン系CoSeO3の強磁場磁気相の解明

大久保 晋

神戸大学

Takanori Kida, Osaka

木田 孝則（大阪大学）
菊池 彦光（福井大学）

Investigation of High-field magnetic phase of
Susumu Okubo

Kobe University

CoSeO3

University
Hikomitsu Kikuchi,

萩原 政幸(大阪大学)
University of Fukui

10 202012-HMBXX-0013

精密電子スピン共鳴測定用パルスマグネットの開赤木 暢

Development of pulsed magnet for precise
神戸大学

発
11 202012-HMBXX-0030

有機ラジカルから成るフラストレート系の低温物
山口 博則

大阪府立大学性測定
12 202104-HMOXX-0049

非従来型超伝導体のパルス強磁場下輸送特性

Mitsuru Akaki

萩原 政幸
Kobe University

electron spin resonance measurements

掛谷 一弘

京都大学

孫 悦（青山学院大学）(大阪大学)

Low temperature physical properties of frustrated

Hironori

spin systems composed of organic radicals

Yamaguchi

Transport measurements on unconventional
Itsuhiro Kakeya

萩原 政幸
Osaka Prefecture University(大阪大学)
Kyoto University

superconductors under pulsed high magnetic fields

Yue Sun, Aoyama Gakuin 萩原 政幸
University(大阪大学)

Magnetic properties of transition metal
13 202105-HMOXX-0053

遷移金属フタロシアニン及びフタロシアニン重合
本多 善太郎埼玉大学

phthalocyanines and poly-phthalocyanines under

体の圧力下における磁性

14 202105-HMOXX-0054

15 202105-HMOXX-0056

16 202107-HMOXX-0096

高磁場下の脂質膜特性の解析
タンパク質結晶の熱物性値の異方性に関する予備

Zentaro Honda

萩原 政幸
Saitama University(大阪大学)
pressure
岡本 行広

牧祥

大阪大学

尾澤 知紘

Investigation of lipid membrane properties under

Yukihiro

Grad. Sch. of Engineeringhigh magnetic fieldOkamotoScience Osaka University

Syou Maki

Okayama University of Science

Preliminary experiment on anisotropy of
岡山理科大学実験

thermophysical properties of protein crystals

キラル磁性体CrTa3S6の強的もしくは反強的キラ

Ferro- or antiferro-based chiral soliton lattice in
高阪 勇輔

大阪府立大学

ルソリトン格子の検証

Ozawa Tomohiro

萩原 政幸(大阪大学)
萩原 政幸(大阪大学)
萩原 政幸

Yusuke Kousaka Osaka Prefecture University
CrTa3S6(大阪大学)

強磁場コラボラトリー / The High Magnetic Field Collaboratory
Member of research
No.

課題番号

課題名

氏名

所属

分担者

Title

Name

Organization

担当所員
project

1 202012-HMBXX-0030

有機ラジカルから成るフラストレート系の低温物
山口 博則

大阪府立大学性測定
2 202012-HMCXX-0006

微視的プローブによる強磁場誘起電子相の探索と

井原 慶彦

精密電子スピン共鳴測定用パルスマグネットの開Hironori

spin systems composed of organic radicals

Yamaguchi

NMR study for magnetic field induced electronic

北海道大学

その周辺ダイナミクス観測3 202012-HMBXX-0013

Low temperature physical properties of frustrated

Osaka Prefecture University

金道 浩一

Yoshihiko Ihara

Hokkaido University

小濱 芳允

Mitsuru Akaki

Kobe University

小濱 芳允

Name

Organization

states and their dynamics
赤木 暢

Development of pulsed magnet for precise
神戸大学発electron spin resonance measurements

留学研究課題 / External Research Project Long / Short -term
No.

課題番号

課題名

氏名

所属

分担者

Title

Member of research
project

115

担当所員

Time-resolved measurement of photodissociation
1 202012-VSBXL-0003

ケージド化合物光解離の時間分解測定

崎元 柊

群馬大学

Shu Sakimotoof caged compounds

116

Gunma University

秋山 英文2021年度

共同利用課題一覧（後期）/ Joint Research List (Latter Term)※実施課題一覧、所属は申請時のデータ

嘱託課題 / Commission Research Project
Member of research
No.

課題番号

課題名

氏名

所属

分担者

Title

Name

Organization

担当所員
project

Materials Foundryのための材料開発システム構築
1 202104-CMBXX-0075

Development of Film Deposition Systems for High高橋 竜太

日本大学

Ryota Takahashi Nihon Universityに向けた薄膜合成装置の開発
ESM-RISM法を実装したQuantum ESPRESSOの高度
2 202110-CMBXX-0149

Mikk Lippmaa

throughput-Material Exploration
萩原 聡

Improvement of Quantum ESPRESSO

Satoshi

Tsukuba University, Center for

implementing the ESM-RISM method

Hagiwara

Computational Sciences

Miho Itoi

Nihon University

上床 美也

Naoki Fujiwara

Kyoto University

上床 美也

Tetsujiro Eto

Kurume Institute of Technology

上床 美也

筑波大学計算科学研究センター

川島 直輝

化

Study on pressure induced superconductivity of low
3 202106-CMBXX-0096

低次元有機物質の圧力下物性研究

糸井 充穂

日本大学
dimension organic conductor
Development of NMR measurement method under

4 202106-CMBXX-0088

圧力下NMR測定法に関する開発

藤原 直樹

京都大学
high pressure

5 202106-CMBXX-0097

高圧下X線回折法の開発

江藤 徹二郎Development of High Pressure X-ray diffraction
久留米工業大学
measurements
6 202106-CMBXX-0087

希土類122化合物における圧力効果

繁岡 透

山口大学

Pressure effect of rare earth 122 compounds

Toru Shigeoka

Yamaguchi University

上床 美也

7 202107-CMBXX-0144

4Gにおける共同利用推進

那波 和宏

東北大学

Research and Support of General-Use at 4G

Kazuhiro Nawa

Tohoku University

眞弓 皓一Tohoku University

眞弓 皓一Tohoku University

眞弓 皓一Daisuke
8 202107-CMBXX-0145

4Gにおける共同利用推進

奥山 大輔

東北大学

Research and Support of General-Use at 4G
Okuyama

9 202107-CMBXX-0146

4Gにおける共同利用推進

佐藤 卓

東北大学

Research and Support of General-Use at 4G

Taku J Sato

Study of the strongly spin-lattice-coupled systems in
10 202110-CMBXX-0150

超強磁場におけるスピン格子強結合系の研究

池田 暁彦

電気通信大学

University of ElectroAkihiko Ikeda

ultrahigh magnetic fields
11 202106-CMBXX-0102
12 202106-CMBXX-0101

有機化合物の光電子分光
レーザースピン角度分解光分光による表面電子状

金井 要
矢治 光一郎

東京理科大学

Photoemission study on organic compounds
SARPES studies of atomic layer materials at

物質・材料研究機構

態の研究

Kaname Kanai
Koichiro Yaji

surfaces

反強磁性を示す近似結晶の精密光電子分光測定

津田 俊輔

物質・材料研究機構

Tokyo University of Science近藤 猛

National Institute for Materials
近藤 猛
Science

Laser-Photoemission Study on antiferromagnetic
13 202106-CMBXX-0117

松田 康弘
Communications

National Institute for Materials
Shunsuke Tsuda

approximant crystals

近藤 猛
Science

Study on the electronic property of electrode
軟X線吸収/発光分光法によるリチウムイオン電池
14 202105-CMBXX-0081

朝倉 大輔

産業技術総合研究所

materials for Li-ion batteries by soft X-ray

電極材料の電子物性研究
三次元nanoESCAによる実デバイスのオペランド電
15 202105-CMBXX-0079

永村 直佳

偏光制御型軟X線分光装置の開発

原田 慈久

平田 靖透

Operando analysis of the electronic structure of

Naoka

National Institute for Materials

actual devices by 3DnanoESCA

Nagamura

Science

物質・材料研究機構

原田 慈久

子状態解析
16 202106-CMBXX-0113

Daisuke Asakura AIST

absorption/emission spectroscopy

Developing a system for the polarization-controlled
防衛大学校

Yasuyuki Hirata
soft X-ray spectroscopy

National Defense Academy of
松田 巌
Japan

一般課題 / General Research Project
No.

課題番号

課題名

氏名

所属

分担者

Title

Name

Organization

Member of research
project

117

担当所員

岡本 敏宏Toshihiro Okamoto

荒井 勇太郎Department of Advanced

Yutaro Arai

X-ray structure determination of molecular single
1 202105-GNBXX-0117

分子性超薄膜単結晶のX線構造解析

熊谷 翔平

東京大学

沢辺 千鶴

Shohei Kumagai Materials Science, Graduate
crystal ultrathin films

黒澤 忠法

School of Frontier Sciences

山中 大輔
Sulfonic Acid Organic Salts with High Proton
岡 弘樹

大阪大学

森 初果

Tadanori Kurosawa
Daisuke Yamanaka

高いプロトン伝導度を示すスルホン酸有機塩の創
2 202201-GNBXX-0187

Chizuru Sawabe

森 初果（東京大学）

製

Hatsumi Mori, The
Kouki Oka

Osaka University

Conductivity

森 初果
University of Tokyo

Magnetization measurements for uranium-based
3 202106-GNBXX-0134

ウラン系微小純良単結晶試料における磁化測定と清水 悠晴

東北大学金属材料研究所

high-quality single crystals and development of

高感度磁力計の開発

Yusei Shimizu

Tohoku University, Institute for山下 穣Materials Researchhigh-resolution magnetometers
Development of Faraday magnetometers for sub-4 202106-GNBXX-0160

インデンター型高圧セルを応用した極低温磁化測清水 悠晴

東北大学金属材料研究所

佐藤 芳樹

kelvin-temperature region under high pressures

定技術の開発Yusei Shimizu

using indenter-type pressure cell

Tohoku University, Institute for

Yoshiki Sato, Tohoku

Materials Research

University

山下 穣

Low-temperature ;low-frequency magnetic
5 202110-GNBXX-0176

古典スピンアイス Ho2Ti2O7 の極低温低周波磁化
柄木 良友

琉球大学

susceptibility measurement of classical spin ice

率測定

6 202105-GNBXX-0152

重い電子系化合物YbRh2Zn20における極低温磁化

Ho2Ti2O7

北澤 崇文

東北大学

測定

池田 陽一

Magnetization measurements at very low

清水 悠晴

temperatures on the heavy fermion compound川又 雅広

YbRh2Zn20

Yoshitomo
University of the Ryukyus

山下 穣

Karaki
Yoichi Ikeda
Kitazawa
Tohoku university
Takafumi

Yusei Shimizu

山下 穣

Masahiro Kawamata

Low-temperature magnetization measurement of
7 202106-GNBXX-0154

ファラデー法による反転対称性を持つ磁性体にお
南部

雄輔

東北大学

川又 雅広

centrosymmetric compounds with a capacitive

ける極低温磁化測定

Yusuke Nambu

Tohoku Univ.

Masahiro Kawamata

山下 穣

Faraday magnetometer
Low-temperature low-frequency magnetic
8 202111-GNBXX-0185

古典スピンアイス Ho2Ti2O7 の極低温低周波磁化
柄木 良友

琉球大学

唐 楠（東京大学）

率測定

susceptibility measurement of classical spin ice
Ho2Ti2O7

Yoshitomo
University of the Ryukyus
Karaki

9 202105-GNBXX-0114

河野 洋平

中央大学

現象の磁気的評価

山下 穣
of Tokyo

辻 貴丹
重い電子系希土類化合物における異方的量子臨界

Nan Tang, The University

Kitami Tsuji

木元 大介

Magnetic properties of anisotropic quantum critical

綱島 海斗

phenomena in a heavy-fermion metal

Yohei Kono

Chuo University

Daisuke Kimoto
山下 穣
Kaito Tsunashima

加藤 謙介

Kensuke Kato

辻 貴丹

Kitami Tsuji
Low-temperature high-resolution magnetostriction

10 202105-GNBXX-0112

c軸磁場下におけるCeCoIn5の極低温精密磁歪測定 橘高 俊一郎

中央大学

木元 大介
measurement on CeCoIn5 in a magnetic field along
綱島 海斗

the c axis

Shunichiro
Chuo University
Kittaka

Daisuke Kimoto
山下 穣
Kaito Tsunashima

加藤 謙介

Kensuke KatoHigh Energy Accelerator

11 202105-GNBXX-0106

スピン軌道結合金属Cd2Re2O7の酸素NMRと電流
瀧川 仁
誘起効果

高エネルギー加速器研究機構・

Oxygen NMR and current-induced effects in theMasashi

物質構造科学研究所

spin-orbit coupled metal Cd2Re2O7

Takigawa

Hall coefficient measurement of 2D cuprates (IV)Shiro Kambe

Research Organization, Institute山下 穣of Materials Structure Science
Graduate School of Science and
12 202105-GNBXX-0122

二次元銅酸化物のホール係数測定IV

神戸 士郎

山形大学大学院理工学研究科

川村 桂太

Engineering, Yamagata

南光 伸哉

Keita Kawamura
Shinya Nanko

University

118

勝本 信吾

Development of the high mobility semiconductor
量子ホール効果のための高移動度半導体試料作製
13 202104-GNBXX-0093

福田 昭

兵庫医科大学

samples for the quantum Hall state and their

Akira Fukuda

Hyogo College of Medicine

勝本 信吾

Takao Ebihara

Shizuoka University

大谷 義近

Kan Nakatsuji

Tokyo Institute of Technologyと超低温での測定
measurements in very low temperature
Physical properties in rare earth intermetallic
14 202109-GNBXX-0181

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

compounds at high magnetic fields in low
temperature
永友 慶

15 202105-GNBXX-0150

窒素吸着Cu(001)表面におけるBi薄膜の成長と電子
中辻 寬

東京工業大学状態

16 202105-GNBXX-0151

微傾斜Si(111)√3×√3-B基板上に成長したBi(110)

Kei Nagatomo
Growth process of Bi thin-film on nitrogen adsorbed

森井 七生
Cu(001) surface and its electronic structure

小森 文夫
中辻 寬

東京工業大学

超薄膜の電子状態

大内 拓実

Electronic structure of Bi(110) thin films grown on

小森 文夫

vicinal Si(111)√3×√3-B substrates

Morii Nanao

吉信 淳

Fumio Komori
Kan Nakatsuji

Tokyo Institute of Technology

Takumi Ouchi
吉信 淳
Fumio Komori

Establishment of selection method for atomic
17 202105-GNBXX-0107

基板での原子クラスター構造選別法の確立と, ク
塚原 規志

群馬工業高等専門学校

ラスター構造と磁性の関係の解明

clusters on the substrate and elucidation of the

Noriyuki

National Institute of Technology,

relation between the cluster structure and its

Tsukahara

Gunma College

Kaname Kanai

Tokyo University of Science

吉信 淳
magnetic properties
Observation of the growth process of organic

18 202106-GNBXX-0128

貴金属表面における水素結合を有する有機分子薄金井 要

東京理科大学

膜の成長過程の観測小久保 裕太molecular thin films with hydrogen bonding on

馬上 怜奈

Yuta Kokubo

吉信 淳

Rena Moue
noble metal surfaces
Control of molecular adsorption on transition metal

19 202105-GNBXX-0101

遷移金属酸化物ナノシート表面への欠陥導入によ野内 亮

大阪府立大学前山 滉貴oxide nanosheet films by introduction of surface

る外来分子吸着の制御

20 202105-GNBXX-0110

GaAs中のエルビウムからの複数の発光線の識別

Ryo Nouchi

Osaka Prefecture University

矢口 裕之

埼玉大学

矢野 裕子
Identification of emission lines from erbium in GaAs Hiroyuki Yaguchi Saitama University
伊藤 駿平
21 202106-GNBXX-0129

新奇ケージド化合物の分光的特性の研究

Hirotaka Maeyama

吉信 淳

defects

樋山 みやび群馬大学

Yuko Yano
秋山 英文
Shunpei Ito
Study of spectroscopic property for a new caged

勝見 渓太

Miyabi Hiyama

Gunma University

Katsumi Keita

秋山 英文

Miyabi Hiyama

Gunma University

Kudo Yuto

秋山 英文

Miyabi Hiyama

Gunma University

Takahashi Yutaka

秋山 英文

Yui Ishikawa

Kagawa University

compound
22 202106-GNBXX-0138

DEACM-ケージドルシフェリンの蛍光測定

樋山 みやび群馬大学

Study for photoluminescence of DEACM caged D工藤 優斗
Luciferin
23 202106-GNBXX-0127

自動定量測定法の開発

樋山 みやび群馬大学

Development of automatic quantitative

高橋 由太翔measurements
24 202110-GNBXX-0179

Si基板上に直接成長させたGaNの成長条件が光学特

石川 由依

香川大学

性に及ぼす影響石川 由依

Influence of growth conditions of GaN on Si

田中 慈大

substrate on optical properties

土居 虹介

Photoluminescence study of GaN/AlN superlattices

田中 慈大

grown by MBE.

石川 由依

Influence of growth conditions of GaN on Si

田中 慈大

substrate on optical properties

Yui Ishikawa

秋山 英文

Tanaka Shigehiro

分子線エピタキシー法を用いて作製したGaN/AlN
25 202110-GNBXX-0180

半導体超格子のフォトルミネッセンスによる光学

土居 虹介

香川大学

Kosuke Doi

Kagawa University

Kosuke Doi

秋山 英文

Tanaka Shigehiro

特性評価
26 202110-GNBXX-0179

Si基板上に直接成長させたGaNの成長条件が光学特

小柴 俊

香川大学

性に及ぼす影響27 202111-GNBXX-0183

Si基板上に成長したGaN系pn素子の電気特性と光
宮川 勇人

香川大学

ハニカム格子系van Vleckエキシトン磁性候補物質

grown on Si substrates
原口 祐哉

Physical properties in candidates of van Vleck
東京農工大学の物性

excitonic honeycomb lattice magnet

119

Kagawa University

Yui Ishikawa

秋山 英文

Tanaka Shigehiro

Electrical and optical properties of GaN pn-junction Hayato
森健

学特性
28 202106-GNBXX-0124

Shyun Koshiba

Kagawa University

Takeshi Mori
秋山 英文

Miyagawa
Yuya Haraguchi

Tokyo University of Agriculture
and Technology

広井 善二

Central Institute of
反強磁性体Eu-Pt-Ga化合物の高圧下における電子
29 202105-GNBXX-0119

九州大学アイソトープ統合安全
本多 史憲

状態の研究

Electronic properties of an antiferromagnetic Eu-Pt小泉 尭嗣（東北大学）

管理センターRadioisotope Science and

Takatsugu Koizumi,

Safety Management, Kyushu

Tohoku university

Fuminori Honda
Al compound under high pressures

上床 美也
University
Central Institute of

30 202106-GNBXX-0167

ウラン化合物の磁性の圧力効果

九州大学アイソトープ統合安全

Effect of Pressure on the magnetism of uranium

管理センター

compounds

本多 史憲Radioisotope Science andFuminori Honda

上床 美也
Safety Management, Kyushu
University

31 202106-GNBXX-0132

Ni2In型強磁性体の自発磁化の圧力効果

安達 義也

山形大学

Pressure effects on the spontaneous magnetization

井田 唯斗

Yoshiya Adachi

Yamagata University

Yuino Ida

上床 美也

Yusuke Hirose

Niigata University

Shun Tsuchida

上床 美也

Masahiro Shinozaki

上床 美也

Shimane University

Gaku Motoyama

上床 美也

Kagoshima University

Soichiro Tsujikawa

上床 美也

Yamaguchi University

Rei Gotanda

上床 美也

Yamaguchi University

Kaneko Tatsuya

上床 美也

Yamaguchi University

Shizuru Sugita

上床 美也

Yamaguchi University

Ryohei Kobayashi

上床 美也

Kouki Akaishi

上床 美也

for Ni2In-type ferromagnets
32 202106-GNBXX-0157

CDWや励起子絶縁体転移に伴う構造相転移温度の
広瀬 雄介

新潟大学

Study of pressure effect on structural transition in
土田 駿

圧力依存性
33 202106-GNBXX-0145

多重極限下における点接合分光測定法の開発

CDW and excitonic orderings
本山 岳

島根大学

Improvement of point-contact spectroscopy for
篠﨑 真碩

Gaku Motoyama Shimane University
multiple extreme conditions

34 202106-GNBXX-0143

奇パリティ多極子秩序候補物質Ce3TiSb5の圧力下
篠﨑 真碩

島根大学

本山 岳

電気抵抗測定35 202106-GNBXX-0166

高スピン分極ホイスラー合金における圧力誘起量
重田 出

鹿児島大学

37 202106-GNBXX-0159

HoRh2Si2のPd置換系化合物の単結晶育成 (3)TmRh2Si2の単結晶育成 (3)Masahirounder pressure

Shinozaki

Search for pressure-induced quantum critical辻川 聡一朗子臨界現象の探索
36 202106-GNBXX-0158

Electrical resistivity measurements of Ce3TiSb5

Iduru Shigeta
phenomenon in highly spin polarized Heusler alloys

藤原 哲也

藤原 哲也

山口大学

山口大学

五反田 礼

金子 達哉

Single crystal growth of Pd substituted compounds

Tetsuya

HoRh2-xPdxSi2 (3)Fujiwara

Single crystal growth of TmRh2Si2 (3)TetsuyaFujiwara
38 202106-GNBXX-0163

39 202106-GNBXX-0162

CeZn2Ge2単結晶の高圧化磁化測定 (2)YbMn2Ge2の圧力誘起価数転移と高圧力下の磁気

藤原 哲也

藤原 哲也

山口大学

山口大学

Magnetization measurements under high pressures Tetsuya
杉田 静留

小林 遼平

状態に関する研究40 202106-GNBXX-0153

ホイスラー化合物Fe3-xMnxSiの圧力下磁気相転移

廣井 政彦

鹿児島大学

of CeZn2Ge2 single crystal (2)Fujiwara

Investigation for pressure induced valence

Tetsuyatransition and magnetic phase of YbMn2Ge2

Fujiwara

Magnetic phase transitions under pressure in
赤石 幸起

Masahiko HIROI Kagoshima University
Heuser compounds Fe3-xMnxSi
Search for high pressure medium suitable for high41 202106-GNBXX-0144

高圧物性測定に適した圧力媒体の探索

村田 惠三

大阪市立大学

Keizo Murata

Osaka City University

上床 美也

Kento Ishigaki

University of Hyogo

上床 美也

Naoki Fujiwara

Kyoto University

pressure experiment on material properties
42 202111-GNBXX-0186
43 202105-GNBXX-0100

Eu3Bi2S4F4における圧力効果の研究S置換したFeSeの高圧低温NMR測定

石垣 賢卯
藤原 直樹

兵庫県立大学
京都大学

Research of pressure effect on Eu3Bi2S4F4
NMR studies on S-substituted FeSe at highYu Zhongyu

Zhongyu Yu

上床 美也

pressures and&nbsp; low temperatures
Kiyoharu Uchima,
44 202105-GNBXX-0108

擬三元化合物Ce1-xLaxNiC2の結晶育成と物質評価

繁岡 透

山口大学

3

内間 清晴（沖縄キリスト Crystal growth and characterization of pseude教短期大学）

Toru Shigeoka

Yamaguchi University

ternary compounds Ce1-xLaxNiC2 3

Okinawa Christian Junior

上床 美也

College
Professor
Kiyoharu Uchima,

45 202105-GNBXX-0109

CeNiC2の結晶育成と物質評価

繁岡 透

山口大学

内間 清晴（沖縄キリスト教短期大学）

Crystal growth and characterization of CeNiC2

Toru Shigeoka

Yamaguchi University

Okinawa Christian JuniorCollege
Professor

120

上床 美也

Search of the ferromagnetic quantum critical
立方晶ラーベス相化合物PrIr2の高圧下物性測定に
46 202111-GNBXX-0184

菅原 仁

phenomenon by the high pressure physicalHitoshiproperty measurement of cubic Laves-phase

Sugawara

神戸大学

よる強磁性量子臨界現象の探索

Kobe university

上床 美也

Tohoku university

益田 隆嗣

compound PrIr2
ベリル中の水分子の量子常誘電状態における同位
47 202105-GNBXX-0149

Deuterium isotope effect of quantum paraelectric
山根 崚

東北大学

Ryo Yamane

体効果
48 202109-GNBXX-0172

セリウム系金属間化合物の物性測定

state of water confined in beryl
植田 大地

Magnetic properties of cerium-based intermetallic
高エネルギー加速器研究機構

Daichi Ueta
compounds

49 202105-GNBXX-0103

金属ナノ構造の超高速発光による研究

末元 徹

Studies on nanostructured metals by ultrafast

電気通信大学

Suemoto Tohru

吉富 大

産業技術総合研究所

The University of Electro-

高田 英行

Takada Hideyuki

奈良崎 愛子Aiko Narazaki
National Institute of Advanced

寺澤 英知

Basic research on next generation laser systems and澁谷 達則

laser machining technology

Dai Yoshitomi

Industrial Science andTechnology

51 202106-GNBXX-0146

山口 誠

秋田大学

パルス時間幅がレーザー加工プロセスに与える影
三村 一暉

徳島大学

有機分子/貴金属界面におけるラシュバ分裂の増Ryunosuke Kuroda
Masahito Tanaka

高林 圭佑

有機分子/貴金属界面におけるラシュバ分裂の増Structural changes induced by laser irradiation in

Yamaguchi

carbon materials

MakotoInfluence of laser pulse duration on laser ablation
三村 一暉

Akita University

Keisuke Takabayashi

小林 洋平

Mimura Kazuki

Tokushima University

Mimura Kazuki

小林 洋平

Kaname Kanai

Tokyo University of Science

process
金井 要

東京理科大学大54 202105-GNBXX-0121

小久保 裕太東京理科大学大

小久保 裕太Enhancement of Rashba splitting on organic

馬上 怜奈

molecule/noble metal interface

小久保 裕太Enhancement of Rashba splitting on organic

馬上 怜奈

molecule/noble metal interface

Ti3SiC2のスピン分解角度分解光電子分光

伊藤 孝寛

名古屋大学

Yuta Kokubo
近藤 猛
Rena Moue
yuta kokubo

Tokyo University of Science

Yuta Kokubo

近藤 猛

Rena Moue

松永 和也
55 202106-GNBXX-0137

小林 洋平

Tatsunori Shibuya
Daisuke Satoh響
53 202105-GNBXX-0121

Eichi Terasawa

黒田 隆之助関する研究
52 202105-GNBXX-0115

Hiroshi Ogawa

佐藤 大輔

田中 真人
炭素材料におけるレーザー照射による構造変化に小林 洋平

Communications

小川 博嗣
次世代レーザーとレーザー加工の基礎技術研究益田 隆嗣
Research Organization

luminescence spectroscopy

50 202105-GNBXX-0104

High Energy Accelerator

Matsunaga Kazuya

山本 凌

Spin- and Angle-resolved photoemission study of杉本 卓史

Ti3SiC2

Takahiro Ito

Nagoya University

Yamamoto Ryo

近藤 猛

Takafumi Sugimoto

保科 拓海

Hoshina Takumi
Many-body interaction of half-metallic

56 202106-GNBXX-0130

バルク敏感高分解能スピン分解光電子分光を用い
横谷 尚睦

岡山大学

たハーフメタル強磁性体の多体効果の研究

片岡 範行

antiferromagnet studied by bulk sensitive high-Takayoshi

瀬戸口 太朗resolution spin-resolved photoemission

YokoyaOkayama University

Noriyuki Kataoka
近藤 猛
Taro Setoguchi

spectroscopy
57 202106-GNBXX-0155

励起子絶縁体の原子層結晶における電子正孔相関

大川 万里生早稲田大学

Photoinduced dynamics of electron-hole correlation

高橋 優の光誘起ダイナミクス(2)58 202109-GNBXX-0171

カロリメトリーによる金属試料の赤外吸収率測定

Mario Okawa

Waseda University

Yu Takahashi

岡﨑 浩三

in atomic-layered excitonic insulators (2)末元 徹

Measurement of infrared absorptivity on metal
電気通信大学
samples by calorimetry

物質合成・評価設備Gクラス / Materials Synthesis and Characterization G Class Research Project

121

Suemoto Tohru

The University of ElectroCommunications

岡﨑 浩三

Member of research
No.

課題番号

課題名

氏名

所属

分担者

Title

Name

Organization

実験室
project

鎌谷 雄大

Magnetism and thermoelectric properties at highNd1-x(Sr0.5Ca0.5)xFeO3 (0.1≦x≦0.9) の高温にお1 202104-MCBXG-0054

Yudai Kamatani
Hiroshi

中津川 博

横浜国立大学

temperature in Nd1-x(Sr0.5Ca0.5)xFeO3 (0.1≦x≦

ける磁性と熱電特性に関する研究

Yokohama National University

電磁気測定室Nakatsugawa
0.9)
Matsuda Yudai
松田 悠大

2 202105-MCBXG-0055

量体化直前の金属における圧力誘起相転移の探索

片山 尚幸

名古屋大学

塩見 学

Search for pressure-induced phase transitions in

Naoyuki

小島 慶太

metals just before dimerization

Katayama

Elucidation of the internal structure of electron-

Naoyukideficient dimerized molecules

Katayama

Nagoya University

電子不足型量体化分子の内部構造の解明

片山 尚幸

名古屋大学

小島 慶太
原 武史

化学分析室

Keita Kojima

X線測定室
電磁気測定室

塩見 学
3 202105-MCBXG-0056

Manabu Shiomi

Nagoya University

Manabu Shiomi

化学分析室

Keita Kojima

X線測定室

Takeshi Hara

電磁気測定室Interfacial energy between orthopyroxene and4 202105-MCBXG-0060

高温高圧下での斜方輝石と水流体の間の界面エネ
松影 香子

帝京科学大学

aqueous fluid in high pressure and highルギー
temperature conditions

Kyoko N.

電子顕微鏡室Teikyo University of Science

Matsukage

高圧合成室

High-pressure synthesis of new rare-earth and5 202105-MCBXG-0061

希土類元素およびアルカリ土類金属元素を充填し関根 ちひろ室蘭工業大学本間 さくらalkaline-earth filled skutterudite-type thermoelectric Chihiro Sekine

た新規スクッテルダイト型熱電材料の高圧合成

Muroran Institute of Technology Sakura Homma

高圧合成室materials
車地 崇
Takashi Kurumaji

池田 凜太郎Rintaro Ikeda
木村 真栄
Shin-Ei Kimura

佐藤 樹

Tatsuki Sato
海本 祐真
6202105-MCBXG-0062

磁気多極子の強的秩序に基づく物質機能の開発

渡辺 義人（有馬
東京大学
孝尚）

渡辺 義人

Development of material functions based on ferroic

Yoshito

Department of Advanced

Yuma Umimoto

X線測定室

multipole order

Watanabe

Materials Science

Shinsuke Yanagida

電磁気測定室柳田 真佑
Yusuke Tokunaga

徳永 祐介

Daigo Ishizaki
石崎 大悟
Masaki Gen
厳 正輝
Kento Yoshida
吉田 健斗

7 202105-MCBXG-0063

8 202106-MCBXG-0065

一次元テルル化物Nb2Pd3Te5における超伝導
幾何学的フラストレート格子を持つキタエフ・ハ

岡本 佳比古

原口 祐哉

名古屋大学

Superconductivity in one-dimensional telluride

YoshihikoNb2Pd3Te5

OkamotoStudy of Physical Properties of Kitaev-Heisenberg

東京農工大学

イゼンベルグ磁性体の物性研究

Yuya Haraguchi

Magnets with Geometric Frustrated Lattice

化学分析室
Nagoya University
電磁気測定室Tokyo University of Agriculture

化学分析室

and Technology

電磁気測定室Graduate School of Frontier
X線測定室
9 202106-MCBXG-0066

合金ナノ粒子のキャラクタリゼーション

佐々木 岳彦東京大学

張 凱朝Characterization of alloy nanoparticles

Takehiko Sasaki

フェ ジシュン

Sciences, Department ofKaichao Zhang

Complexity Science and

He Zixuan

電子顕微鏡室
光学測定室

Engineering
Graduate School of Science and
10 202106-MCBXG-0070

二次元銅酸化物の磁化率測定

神戸 士郎

山形大学

川村 桂太

Magnetic susceptibility measurement of 2D

南光 伸哉

cuprates

122

Shiro Kambe

Engineering, Yamagata
University

Keita Kawamura
Shinya Nanko

電磁気測定室High pressure synthesis of RuI3 with the
11 202106-MCBXG-0073

ハニカム格子を持つRuI3の高圧合成

今井 良宗

東北大学

藤原 秀行

X線測定室
Yoshinori Imai

Tohoku university

Hideyuki Fujihara

honeycomb structure

高圧合成室

Crystal growth and physical properties

物質合成室

奇パリティ磁気多極子秩序を持つ物質の単結晶育12 202106-MCBXG-0076

阿部 伸行

日本大学

measurement in odd parity multipole ordering

Nobuyuki Abe

Nihon University

X線測定室

成と物性評価materials

電磁気測定室赤石 幸起
Kouki Akaishi
鹿児島大学
13 202106-MCBXG-0079

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

Kagoshima University

大学院生（前期・修士課 Study on antiferromagnetism in Heusler
程）

高度に制御された凝縮相と高圧非平衡プラズマの14 202106-MCBXG-0082

相互作用による金属等の表面改質および微粒子合

東京大学

成の研究

Kagoshima University

電磁気測定室compounds

Surface modification of metals and synthesis of fine

新田 魁洲
宗岡 均

Masahiko Hiroi

metal particles by interaction between highly
黒田 知暉

Kaishu Nitta
Hitoshi Muneoka The University of Tokyo

controlled condensed phases and high-pressure
羽藤 健

Kuroda Tomoki

電子顕微鏡室Takeru Hato
non-equilibrium plasmas
Studies on phase-separated superconducting

交流磁化率測定による反強磁性絶縁体に近接した
15 202106-MCBXG-0083

層状有機超伝導体における相分離した超伝導相の

谷口 弘三

埼玉大学

phase in layered organic superconductors
高橋 啓太

Hiromi Taniguchi Saitama University

Takahashi Keita

電磁気測定室Takaaki Yokoyama

電磁気測定室bordering on antiferromagnetic insulating phase by研究
ac susceptibility measurements
Study on analysis of magnetic properties for highly
16 202106-MCBXG-0094

高スピン分極ホイスラー合金の磁気特性のスピン
重田 出

鹿児島大学

横山 喬亮

spin polarized Heusler alloys by the spin fluctuation Iduru Shigeta

ゆらぎ理論による解析に関する研究

Kagoshima University

theory

物質合成・評価設備Uクラス / Materials Synthesis and Characterization U Class Research Project
Member of research
No.

課題番号

課題名

氏名

所属

分担者

Title

Name

Organization

実験室
project

Magnetism and thermoelectric properties at highSm1-x(Sr0.5Ca0.5)xFeO3 (0.1≦x≦0.9) の高温にお1 202109-MCBXU-0104

Hiroshi
中津川 博

横浜国立大学

鎌谷 雄大

temperature in Sm1-x(Sr0.5Ca0.5)xFeO3 (0.1≦x≦

ける磁性と熱電特性に関する研究

0.9)

Yokohama National University

Yudai Kamatani

電磁気測定室Nakatsugawa

High-temperature magnetization for Sr-Al-O
2 202109-MCBXU-0106

Sr-Al-O系ウイスカー結晶の高温磁性評価

鄭 旭光

佐賀大学

Xu-Guang Zheng Saga University

電磁気測定室Takeshi Waki

Kyoto University

X線測定室

Hongyao Zhou

The University of Tokyo

whisker crystals
3 202111-MCBXU-0110

YnConGa型遍歴電子磁性体の単結晶X線構造解析

和氣 剛

X-ray Single-Crystal Structural Analysis of YnConGa京都大学
type itinerant electron magnets
4 202111-MCBXU-0111

ハイドロゲル中に吸着されたポリヨウ化物イオン

周 泓遥

東京大学

Identification of polyiodide ions adsorbed in

松野 稜平

の同定
5 202109-MCBXU-0107

セリウム系金属間化合物のarc溶解による合成

Ryohei Matsuno

光学測定室hydrogel
植田 大地

Sample growth of a cerium-based intermetallic
高エネルギー加速器研究機構

Daichi Ueta
compounds by arc melting method

High Energy Accelerator
物質合成室Research Organization

国際超強磁場科学施設 / International MegaGauss Science Laboratory
No.

課題番号

課題名

氏名

所属

分担者

Title

Name

Organization

Member of research
project

123

担当所員

Relationship between unconventional
重い電子系化合物が示す非従来型超伝導と非フェ1 202105-HMBXX-0059

Makoto
横山 淳

茨城大学

平山 堅理

superconductivity and non-Fermi-liquid state in

ルミ液体状態の相関

Ibaraki University

Takatoshi Hirayama

金道 浩一

Yokoyama
heavy-fermion compounds
Magnetic properties of double-perovskite-Fe

フラストレート格子をもつダブルペロブスカイト
2 202105-HMBXX-0064

小杉 佳久
後藤 真人

Yoshihisa Kosugi

京都大学

鉄酸化物の強磁場磁性

oxides with frustrated lattices under high magnetic

Masato Goto

Kyoto University

飯星 眞

金道 浩一
Makoto Iihoshi

fields3 202105-HMBXX-0065

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

Magnetization measurements of the frustrated

Hikomitsu

magnets

Kikuchi

University of Fukui

金道 浩一

Determination of the magnetic structure of organic
4 202105-HMBXX-0067

超伝導相近傍に位置する有機反強磁性体の磁気構
小林 拓矢

埼玉大学

安村 乃絵瑠antiferromagnets located in the vicinity of the

造決定

5 202106-HMBXX-0066

フラストレートしたハニカム格子磁性体におけるsuperconducting phase
原口 祐哉

東京農工大学

Search for novel magnetic field-induced phases in
八束 波椰斗新奇磁場誘起相の探索

6 202106-HMBXX-0071

Yuya Haraguchi

渡辺 孝夫

弘前大学

Tokyo University of Agriculture

Noeru Yasumura

金道 浩一

Yatsuzuka Hayato

金道 浩一

and Technology

Observation of preformed Cooper pairing in highTc cuprates using out-of-plane resistivity

超伝導体における前駆クーパー対形成の検証

Saitama University
Kobayashi

frustrated honeycomb lattice magnets
藤井 武則（東京大学）

パルス強磁場中c軸抵抗率測定による銅酸化物高温

TakuyaTakenori Fujii, The
Takao
Hirosaki University

University of Tokyo
金道 浩一

measurements of Bi(Pb)-2212 single crystals under Watanabehigh pulsed magnetic fields

7 202106-HMBXX-0073

有機超伝導体のFFLO超伝導相に対する乱れの効果 杉浦 栞理

Disorder effect on FFLO superconductivity of東北大学 金属材料研究所

Shiori Sugiuraorganic superconductors

金道 浩一
Tohoku University

Magnetic properties of S = 1/2 kagome lattice
S = 1/2カゴメ格子反強磁性体A2BTi3F12および擬
8 202106-HMBXX-0081

Institute for Materials Research,

二次元遍歴電子系ACo2X2の高磁場下における磁気 道岡 千城

京都大学

森山 広大

特性

antiferromagnets A2BTi3F12 and quasi-two-Michiokadimensional itinerant electron system ACo2X2 in

Chishiro

Kyoto University

Kodai Moriyama

金道 浩一

Kitazawa Takafumi

金道 浩一

high magnetic fields
Recovery of the single-ion anisotropy at high
高磁場における１イオン磁気異方性の回復過程の10 202109-HMBXX-0099

観測と常磁性良導体試料に対するパルス強磁場磁池田 陽一

東北大学金属材料研究所

magnetic fields and verification of the optimum

北澤 崇文

Yoichi Ikeda

condition on magnetization measurements for

Institute for materials research,
Tohoku university

化測定の最適条件の検討
paramagnetic metals in pulsed high magnetic field
11 202110-HMBXX-0104

三角格子磁性体NaPrTe2の強磁場磁化過程

岡本 佳比古名古屋大学

High-Field Magnetization Measurement of a

Yoshihiko

Triangular Magnet NaPrTe2

Okamoto

Nagoya University

金道 浩一

Hokkaido University

金道 浩一

Masaki Gen

The University of Tokyo松田 康弘

Pelin Tozman

National Institute for Materials

Study of giant negative magnetoresistance and
12 202110-HMBXX-0105

λ型有機導体の示す負の巨大磁気抵抗、磁場誘起

福岡 脩平

北海道大学

magnetic field-induced insulator-metal transition in Shuhei Fukuoka

絶縁体金属転移の解明

13 202110-HMBXX-0106

トポロジカル磁気相転移に伴う格子歪みの研究

λ-type organic conductors
厳 正輝

Study of lattice distortions associated with

東京大学

topological phase transition
14 202201-HMBXX-0110

超高磁場下で巨大な異方性磁場を持つ Sm-Co-B

トズマン カラニ

ベースの化合物の調査

コラス ペリン

Investigation of Sm-Co-B-based compounds with

物質・材料研究機構

giant anisotropy field under ultrahigh magnetic field Karanikolas

松田 康弘

Science

Observations of superconducting states in Fe(Te,S)
15 202106-HMBXX-0069

ヨウ素輸送法で育成したFe(Te,S) における超伝導状態の磁気光学イメージングによる観測

矢口 宏

東京理科大学藤川 俊樹

grown by an iodine-transport method using an MO

山中 隆義

Hiroshi Yaguchi

Tokyo University of Science

Toshiki Fujikawa
Takayoshi Yamanaka

imaging technique

124

徳永 将史

Observation of the distribution of superconductivity
鉄系超伝導体Fe(Te, Se)における超伝導空間分布の16 202106-HMBXX-0074

矢口 宏
山中 隆義

磁気光学イメージングによる観測

Hiroshi Yaguchi
Takayoshi

東京理科大学in Fe(Te, Se) using a magnet optical imaging
打川 景大

Tokyo University of Science

Keita Uchikawa

徳永 将史

Hideaki Sakai

Osaka University

Masaki Kondo

徳永 将史

Kawachi Shiro

University of Hyogo

Yamanakatechnique

17 202106-HMBXX-0079

磁性元素をドープした極性ディラック電子系の強

酒井 英明

大阪大学

Study of high-field phenomena in magnetic-ion-

近藤 雅起

磁場物性

doped polar Dirac materials

マルチフェロイック物質の外場による相転移現象
18 202106-HMBXX-0085

Study of phase transition phenomena in
河智 史朗

兵庫県立大学の研究

徳永 将史

multiferroic materials under external fields
Takatsugu Koizumi,
Central Institute of

19 202106-HMBXX-0090

反強磁性体EuPt3Al5の強磁場磁化測定

本多 史憲

九州大学アイソトープ統合安全 小泉 尭嗣（東北大学）

High-field magnetization measurement on a new

管理センターantiferromagnet EuPt3Al5

Fuminori Honda

Tohoku university
Radioisotope Science and徳永 将史
Safety Management, Kyushu
University

Research Institute for20 202110-HMBXX-0103

マルチフェロイック物質(NH4)2[FeCl5(H2O)]の電
木原 工

Magnetoelectric effect of multiferroic
岡山大学異分野基礎科学研究所

気磁気効果

Takumi Kihara(NH4)2[FeCl5(H2O)]Interdisciplinary Science,

徳永 将史

Okayama University
Magnetic proximity effect and quantum transport
21 202112-HMBXX-0109

強磁性/常磁性半導体ヘテロ接合における磁気近接 レデゥック アイ
効果と量子輸送現象

22 202106-HMBXX-0088

ブリージングパイロクロア格子磁性体の新規磁場

東京大学

ン

厳 正輝

白谷 治憲

phenomena in ferromagnetic/nonmagnetic

瀧口 耕介

Le Duc Anh

The University of Tokyo

Search for novel field-induced properties and

東京大学

Masaki Gen

The University of Tokyo

有機スピン液体候補物質の超強磁場物性研究

小濱 芳允

functionalities in breathing pyrochlore magnets
Physical property measurements of organic spin

23 202109-HMBXX-0100

徳永 将史

Takiguchi Kosuke
semiconductor heterostructures

誘起物性および機能性の開拓

Harunori Shiratani

宮川 和也

東京大学

杉浦 栞理（東北大学）
浦井 瑞紀

liquid candidate materials under ultra-highmagnetic field

Shiori Sugiura, Tohoku
KazuyaThe University of Tokyo

Miyagawa

University

小濱 芳允

Mizuki Urai

Magneto-Optical Spectroscopy of Molecular
24 202109-HMBXX-0101

強磁場下における分子材料励起三重項状態の磁気石井 和之

生産技術研究所

Materials in the Excited Triplet States under Strong

光学分光

Kazuyuki Ishii

Institute of Industrial Science

小濱 芳允

Kawachi Shiro

University of Hyogo

小濱 芳允

Name

Organization

Magnetic Fields
Start-up of a 30-Tesla-class portable pulsed
25 202111-HMBXX-0108

30テスラ級小型パルス電磁石の立ち上げとマルチ

河智 史朗

兵庫県立大学

magnet and its application to the study of

フェロイック物質研究への応用
multiferroic materials

大阪大学大学院理学研究科附属先端強磁場科学研究センター / Center for Advanced High Magnetic Field Science, Graduate School of Science, Osaka University
No.

課題番号

課題名

氏名

所属

分担者

Title

Member of research
担当所員
project
1 202105-HMOXX-0063

パルス強磁場用極低温実験装置の開発

野口 悟

大阪公立大学

Development of the cryostat for pulsed high吉田 勝一

Satoru Noguchi

Osaka Metropolitan University

Yoshida萩原 政幸

magnetic field
2 202106-HMOXX-0072

強いスピン-軌道相互作用を活かした酸化物スピン
松野 丈夫

大阪大学

和氣 剛

京都大学

Oxide spintronics utilizing strong spin-orbit coupling Jobu Matsuno

Osaka University

萩原 政幸

Kyoto University

萩原 政幸

トロニクス
3 202105-HMOXX-0062

RInCu4単結晶のパルス強磁場磁化測定

Pulse high field magnetization measurement ofTakeshi Waki
RInCu44 202105-HMOXX-0061

ショートパルスマグネットを用いた圧力下ESR装置
櫻井 敬博

神戸大学

Development of high-pressure ESR system using
赤木 暢

の開発

short pulse magnet

125

Takahiro Sakurai Kobe University

Mitsuru Akaki

萩原 政幸

Superconducting properties of BaPt(As1-xSbx) with
5 202111-HMOXX-0107

ハニカム構造を持つBaPt(As1-xSbx)の超伝導物性

工藤 一貴

大阪大学

Kazutaka Kudo

Osaka University

萩原 政幸

Itsuhiro Kakeya

Kyoto University

萩原 政幸

Hideaki Sakai

Osaka University

honeycomb networks
Transport measurements on unconventional
6 202109-HMOXX-0098

非従来型超伝導体のパルス強磁場下輸送特性

掛谷 一弘

京都大学
superconductors under pulsed high magnetic fields
奥田 裕貴

7 202106-HMOXX-0080

磁性を有する極性金属における磁気秩序の解明

酒井 英明

大阪大学

Yuki Okuda

近藤 雅起

Study of magnetic order in a magnetic polar metal

湯浅 直輝

Masaki Kondo

萩原 政幸

Naoki Yuasa
Characteristic magnetic properties and high-field

8 202105-HMOXX-0058

空間反転対称性の破れや磁気フラストレーション
竹内 徹也

大阪大学

に誘発された特異な磁気特性と強磁場物性

9 202105-HMOXX-0057

辺及び頂点共有Cu4四面体フラストレート系の強大貫 惇睦（理化学研究
所）

浅野 貴行

symmetry and/or magnetic frustration.
High-field properties of frustrated systems with
福井大学

磁場物性
10 202106-HMOXX-0075

S = 5/2バックルドハニカム反強磁性体Cs3Fe2Cl9magnetism in materials with a lack of inversion

Tetsuya
Osaka University

Yoshichika Onuki, RIKEN

萩原 政幸

TakeuchiTakayuki Asano

University of Fukui

萩原 政幸

Hokkaido University

萩原 政幸

corner- and edge-sharing Cu4 tetrahedra
吉田 紘行

北海道大学

の強磁場ESR測定

High-field ESR measurements on S = 5/2 buckled-

Hiroyuki Kura

honeycomb antiferromagnet Cs3Fe2Cl9

Yoshida

Title

Name

強磁場コラボラトリー / The High Magnetic Field Collaboratory
No.

課題番号

課題名

氏名

所属

分担者

Organization

Member of research
担当所員
project
1 202106-HMBXX-0089

有機ラジカルからなるフラストレート磁性体の強
山口 博則

准教授

磁場物性
2 202108-HMCXX-0097

微視的プローブによる強磁場誘起電子相の探索と井原 慶彦

High-field magnetic properties of frustrated

Hironorimaterials composed of organic radicals

Yamaguchi

NMR study for magnetic field induced electronic
北海道大学大学院

その周辺ダイナミクス観測

Osaka Prefecture University

金道 浩一

Yoshihiko Ihara

Hokkaido University

萩原 政幸

Name

Organization

states and their dynamics

留学研究課題 / External Research Project Long / Short -term
No.

課題番号

課題名

氏名

所属

分担者

Title

Member of research

担当所員

project
Pressure-induced superconductivity in π-electron‒
1 202012-VSBXL-0004

π電子−プロトン相関型有機伝導体κ-H3(Cat-

北山 元晴

東邦大学

proton coupled organic conductor κ-H3(Cat-EDT-

EDT-ST)2における圧力誘起超伝導

Motoharu

TOHO University

森 初果

Ryo Kumagai

Gunma University

秋山 英文

Keisuke Saito

Gunma University

秋山 英文

Shu Sakimoto

Gunma University

秋山 英文

KitayamaST)22 202011-VSBXL-0001

クマリンケージド D-ルシフェリンの蛍光測定

熊谷 遼

Photoluminescence spectroscopy of coumarin-

群馬大学

caged D-luciferin
3 202012-VSBXL-0002

ルシフェリン-ルシフェラーゼ反応における触媒金齋藤 啓輔

Influence of cadmium on luciferin - luciferase
群馬大学

属としてのカドミウムの作用

reaction as catalytic metals
Time-resolved measurement of photodissociation

4 202012-VSBXL-0003

ケージド化合物光解離の時間分解測定

崎元 柊

群馬大学
of caged compounds

1262021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 Research Project 2021

※実施課題一覧、所属は申請時のデータ

Member of research
No.

課題番号

課題名

氏名

所属

分担者（共同研究者）

Title

Name

Organization

ビーム装置

project

ポート

Daisuke Okuyama,Kazuhiro Nawa, Wu Hung奥山 大輔, 那波 和宏, Wu
1

GPTAS（汎用3軸中性子分光器）IRT課題

佐藤 卓

東北大学

Hung-Cheng, 横山 淳, 田Cheng, Makoto
IRT project of GPTAS

Taku J Sato

Tohoku University

Yokoyama, Yoshikazu

GPTAS

4G

GPTAS

4G

GPTAS

4G

GPTAS

4G

GPTAS

4G

GPTAS

4G

GPTAS

4G

GPTAS

4G

GPTAS

4G

GPTAS

4G

Kurumaji, Takahisa Arima, PONTA

5G

畑 吉計, 村崎 遼, 平岡 巧,
Tabata, Ryo Murasaki,
宮田 颯
Takumi Hiraoka, Hayato
Miyata
那波 和宏, Pharit2

a-Cu2V2O7 の非相反マグノンに対するbc面内磁場
佐藤 卓

東北大学

Kazuhiro Nawa, Pharit

Piyawongwatthana, 奥山

効果

Effect of in-plane magnetic field for the
Taku J Sato

Tohoku University

Daisuke Okuyama
PharitPharit3

準一次元量子反強磁性体 Cu2(MoO4)(SeO3)の磁気

Piyawongwatthana,nonreciprocal magnon in a-Cu2V2O7
大輔

佐藤 卓

東北大学

Piyawongwatthana, 奥山

励起

Magnetic Excitation of the Quasi-1D Quantum
Taku J Sato

Tohoku University

Antiferromagnet Cu2(MoO4)(SeO3)

Piyawongwatthana,
Daisuke Okuyama,

大輔, 那波 和宏
Kazuhiro Nawa
CEF, short-range correlation, and spin excitations in
4

量子三角格子磁性体Ba3Yb(BO3)3の結晶場、短距

佐藤 卓

東北大学

離相関および磁気励起

松坂 信之介, 奥山 大輔, 那

the new quantum triangular-lattice compound

Shinnosuke Matsuzaka,
Taku J Sato

Tohoku University

Daisuke Okuyama,

波 和宏
Ba3Yb(BO3)3

Kazuhiro Nawa
Minoru Soda, Edward

左右田 稔, Foley Edward,
5

Sr2RuO4の磁気揺らぎの超伝導発現機構への関連
古川 はづきお茶の水女子大学性の証明

石田 茜, 河村 聖子, 井上
凜香, 中村 琴美, 植木 萌

Foley, Akane Ishida, Seiko
Mechanism of superconductivity and magnetic

Hazukifluctuations in Sr2RuO4

Furukawa

Ochanomizu University

Kawamura, Rika Inoue,
Kotomi Nakamura, Moe
Ueki

反強磁性量子臨界的挙動がもたらす異常超伝導物
6Anomalous superconducting properties generated Makoto
横山 淳

茨城大学

平山 堅理, 川崎 郁斗

性キタエフ候補物質α-RuBr3における分数スピン励
7

スピンアイスにおけるトポロジカル相転移

Yokoyama

Kawasaki

今井 良宗, 大串 研也, 佐藤 Fractional spin excitations in the Kitaev candidate
那波 和宏

東北大学

起
8

Takatoshi Hirayama, Ikuto
Ibaraki University

by antiferromagnetic quantum criticality

門脇 広明

東京都立大学

Yoshinori Imai, Kenya
Kazuhiro Nawa

卓

compound α-RuBr3

佐藤 卓

Topological phase transition in spin ice

Tohoku University
Ohgushi, Taku J Sato

HiroakiTokyo Metropolitan University

Taku J Sato

KadowakiInvestigation of Valence-Lattice Coupling9

価数揺動希土類化合物における電荷・フォノン結筒井 智嗣

高輝度光科学研究センター

合現象の検証10

液体ベンゼンの部分構造因子

李 哲虎, 光田 暁弘, 和田
裕文, 坂上 良介

亀田 恭男

山形大学

中島 多朗

東京大学

Phenomenon in Valence-Fluctuating Rare-Earth

Chul-Ho Lee, Akihiro
Satoshi Tsutsui
Research InstituteIntermetallics
天羽 優子, 臼杵 毅

Partial structure factors of liquid benzene

齋藤 開, 車地 崇, 有馬 孝

Magnetic structures in a centrosymmetric skyrmion-

尚, Ju Jiwon

host compound Gd2PdSi3Japan Synchrotron Radiation

Yasuo Kameda

Yamagata University

Taro Nakajima

The University of Tokyo

Mitsuda, Hirofumi Wada,
Ryosuke Sakagami
Yuko Amo, Takeshi Usui
Hiraku Saito, Takashi

11

反転対称性を持つスキルミオン物質Gd2PdSi3の磁気構造の検証127

Ju Jiwonワイル−近藤半金属を含むトポロジカル希土類物
12Magnetic states of topological rare-earth materials
岩佐 和晃

茨城大学

下田 愛海, 桑原 慶太郎

質における磁気状態

Ami Shimoda, Keitaro
Kazuaki Iwasa

Ibaraki University

including Weyl‒Kondo semimetals

PONTA

5G

PONTA

5G

PONTA

5G

PONTA

5G

PONTA

5G

PONTA

5G

PONTA

5G

PONTA

5G

Nakamura, Edward Foley, PONTA

5G

Kuwahara
Yusuke Tokunaga,

Eu系ダイアモンド格子物質におけるスピンテクス
13

徳永 祐介, 有馬 孝尚, 中島 Search for spin textures in a Eu-based diamond車地 崇

Takashi

東京大学

チャの探索

The University of Tokyo多朗

lattice magnet

Takahisa Arima, Taro

KurumajiNakajima
Yoshiya Uwatoko, Ma

上床 美也, Ma Hanming,
14

空間反転対称性の破れた化合物CeNiC2の磁気構造 郷地 順

東京大学繁岡 透, 中島 多朗, 齋藤

Magnetic structure of non-centrosymmetric
Jun Gouchi

The University of Tokyo

compound CeNiC2
開Hanming, Toru Shigeoka,
Taro Nakajima, Hiraku
Saito

15

偏極中性子散乱によるCoTa3S6の磁気構造解析

関 真一郎

東京大学

中島 多朗, 高木 里奈, 高木 Magnetic structure analysis for CoTa3S6 by寛貴
16

偏極中性子散乱法によるEuAl4の磁気構造解析

高木 里奈

東京大学

Shinichiro Seki

The University of Tokyo

polarized neutron scattering中島 多朗, 関 真一郎

Magnetic structure analysis of EuAl4 by polarized

Taro Nakajima, Rina
Takagi, Hirotaka Takagi
Rina Takagi

The University of Tokyo

neutron scattering

Taro Nakajima, Shinichiro
Seki

Search for the magnetic structure of CeRh2Si217

中性子弾性散乱によるCeRh2Si2の一軸圧下磁気構
齋藤 開

東京大学

造の探査

中島 多朗, 網塚 浩, 今 布
咲子

under uniaxial pressure by means of elastic neutron Hiraku Saito

The University of Tokyo

Taro Nakajima, Hiroshi
Amitsuka, Fusako Kon
diffraction
Investigation of magnetic excitation in high18三角格子反強磁性体 CuFeO2の圧力誘起磁気相転寺田 典樹

物質材料研究機構

中島 多朗

pressure condition for triangular lattice移に伴う磁気励起の探査

Noriki Terada

National Institute for Materials
Taro Nakajima
Scienceantiferromagnet CuFeO2

Masato Matsuura,
松浦 直人, 池内 和彦, 山内
19

Mn3TX系におけるスピンカイラリティー転移社本 真一

総合科学研究機構

宏樹, Chang Lieh-Jeng, 池 Spin chirality transition in Mn3TX system

ShinichiShamoto内 和彦, 山内 宏樹

Comprehensive Research

Kazuhiko Ikeuchi, Hiroki

Organization for Science andYamauchi, Chang Lieh-

SocietyJeng, Kazuhiko Ikeuchi,
Hiroki Yamauchi
Minoru Soda, Kotomi

20

MnO酸化物の磁気相転移とスピンカレントに関す

古川 はづきお茶の水女子大学る研究左右田 稔, 中村 琴美,

Contribution of magnetism on spin current in MnOFoley Edward, 植木 萌

Hazuki

Ochanomizu University

Furukawa
Moe Ueki
Takatsugu Masuda,

益田 隆嗣, 浅井 晋一郎, 齋
21

PONTA（高性能偏極中性子散乱装置）IRT課題

中島 多朗

東京大学

藤 開, 上床 美也, 郷地 順,

Shinichiro Asai, Hiraku
IRT project of PONTA

Taro Nakajima

Tokyo University

寺田 典樹, Ju Jiwon

Saito, Yoshiya Uwatoko,

PONTA

5G

TOPAN

6G

TOPAN

6G

Jun Gouchi, Noriki Terada,
Ju JiwonMitsuru Tsukagoshi,

22

YbNi3Al9の結晶場励起

松村 武

広島大学

塚越 舜, 比嘉 野乃花, 岸田
Crystal Field Excitation of YbNi3Al9
卓

Takeshi
Hiroshima University
Matsumura

Nonoka Higa, Suguru
KishidaComprehensive Research
電子添加型銅酸化物PLCCOの格子振動を通じた
23

Observation of the gap symmetry due to lattice
池内 和彦

総合科学研究機構

Kazuhiko Ikeuchi Organization for Science andギャップ対称性の観測

vibrations in e-doped cuprate PLCCO

128

SocietyYusuke Nambu, Yoichi
南部 雄亮, 池田 陽一, 谷口

Ikeda, Takanori Taniguchi,

貴紀, 木村 宏之, 岩佐 和

Hiroyuki Kimura, Kazuaki晃, 大山 研司, Xie Peiao,

Iwasa, Kenji Ohoyama,

TOPAN（東北大理：３軸型偏極中性子分光器 ）
24

藤田 全基

東北大学

Pang Xiaoqi, Wang Tong,

IRT project of TOPAN

Masaki Fujita

Tohoku University

Xie Peiao, Pang Xiaoqi,

TOPAN

6G

HER

C1-1

HER

C1-1

HER

C1-1

IRT課題
唐 一飛, Chen Yizhou, 大Wang Tong, Tang Yife,

里 耕太郎, 北山 慎之介, 橋Chen Yizho, Koichiro

本 勇輝

Ohsato, Shinnosuke
Kitayama, Yuki Hashimoto25

空間反転対称性を持つ磁気スキルミオン物質
中島 多朗

東京大学

Magnetic excitations of a centrosymmetric
齋藤 開, Ju Jiwon

Gd2PdSi3の磁気励起

Taro Nakajima

The University of Tokyo

Taku J Sato

Tohoku University

那波 和宏, Pharit
26

a-Cu2V2O7 の非相反マグノンに対するbc面内磁場
佐藤 卓

東北大学

効果

Kazuhiro Nawa, Pharit

Piyawongwatthana, 奥山

Effect of in-plane magnetic field for thenonreciprocal magnon in a-Cu2V2O7

大輔

量子三角格子磁性体Ba3Yb(BO3)3の結晶場、短距
佐藤 卓

東北大学

離相関および磁気励起28

Magnon dispersion relations in a 2D Dresselhaus

松坂 信之介, 奥山 大輔, 那
波 和宏

南部 雄亮
フラストレーション磁性体YBaCo4O7における磁Shinnosuke Matsuzaka,
Taku J Sato

Tohoku University

Ba3Yb(BO3)3
Magnon dispersion relations in a 2D Dresselhaus
東北大学

magnet29

the new quantum triangular-lattice compound

Piyawongwatthana,
Daisuke Okuyama

CEF, short-range correlation, and spin excitations in
27

Hiraku Saito, Ju Jiwon

skyrmion-host material Gd2PdSi3

Daisuke Okuyama,Kazuhiro Nawa

Yusuke Nambu

Tohoku University

HER

C1-1

Minoru Soda

Ochanomizu University

HER

C1-1

Takahisa Arima

The University of Tokyo

Takashi Kurumaji, Su Dan, HER

C1-1

magnet左右田 稔

magnetic diffuse scattering of frustrated magnet
お茶の水女子大学

気散漫散乱

YBaCo4O7
Yusuke Tokunaga,

30

GaV4Se8における巨大な熱ホール効果を生む磁気
有馬 孝尚

東京大学

スキルミオン凝縮状態の研究

31

スピンギャップ系KCuCl3における圧力誘起量子相徳永 祐介, 車地 崇, Su

Dan, 中島 多朗, 井出 竜鳳 Thermal Hall Effect栗田 伸之

東京工業大学益田 隆嗣, 田中 秀数

転移と磁気励起32

反強磁性量子臨界的挙動がもたらす異常超伝導物

Pressure-induced quantum phase transition andTaro Nakajima, Ryuho Ide
Nobuyuki Kurita

Tokyo Institute of Technology

横山 淳

茨城大学

平山 堅理, 川崎 郁斗

Inelastic neutron scattering study on the optical益田 隆嗣

東京大学

C1-1

HER

C1-1

HER

C1-1

HER

C1-1

Tohoku University

Ryo Murasaki, Taku J Sato HER

C1-1

National Institute for Materials

Takatsugu Masuda,

Science

Shinichiro Asai

Hidekazu Tanaka

Anomalous superconducting properties generated Makoto
by antiferromagnetic quantum criticality

Yokoyama

Inelastic neutron scattering study on the optical-

Takatsugu

acoustic phonon interactions in InSe

Masuda

Ma Jie, 浅井 晋一郎

acoustic phonon interactions in InSe

Takatsugu Masuda,

HER

magnetic excitation in the spin gap system KCuCl3

性33

Magnetic Skyrmion States in GaV4Se8 with Large

Ibaraki University

Takatoshi Hirayama, Ikuto
Kawasaki
The University of Tokyo

Ma Jie, Shinichiro Asai

Takanori Taniguchi, Yoich
34

T'構造銅酸化物Pr2-xCaxCuO4における磁気相関と
藤田 全基

東北大学

超伝導の研究谷口 貴紀, 池田 陽一, 高濱 Study of spin correlations and superconductivity in
Masaki Fujita

Tohoku University

元史, 陳 逸舟, Wang Tong T'-structured cuprate oxide Pr2-xCaxCuO4

iIkeda, Motofumi
Takahama, Chen Yizhou,
Wang Tong35

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

村崎 遼, 佐藤 卓

Spinon Rashba splitting on the quantum spin chain Kazuhiro Nawa

長谷 正司

物質・材料研究機構

益田 隆嗣, 浅井 晋一郎

Study of magnetic excitations of spin chain material
交替した内部磁場が印加されるスピン鎖物質
36
Tb3RuO7の磁気励起の研究

Tb3RuO7 to which staggered internal magnetic

Masashi Hase

fields are applied

HER

C1-1

HER

C1-1

Investigation of magnetic excitation in high37

三角格子反強磁性体 CuFeO2の圧力誘起磁気相転寺田 典樹

物質材料研究機構

中島 多朗

pressure condition for triangular lattice移に伴う磁気励起の探査
antiferromagnet CuFeO2

129

Noriki Terada

National Institute for Materials
Science

Taro Nakajima

Shinichiro Asai, Taku J
Sato, Makoto Yokoyama,
浅井 晋一郎, 佐藤 卓, 横山
Hiraku Saito, TaroHER (高エネルギー分解能３軸型中性子分光器) IRT
38

淳, 斎藤 開, 中島 多朗, 阿
益田 隆嗣

東京大学

課題

Takatsugu
IRT project of HER

曽 尚文, 田中 秀数, 栗田

The University of Tokyo

Nakajima, Naofumi Aso,

HER

C1-1

SANS-U

C1-2

SANS-U

C1-2

SANS-U

C1-2

SANS-U

C1-2

SANS-U

C1-2

Ishida, Edward Foley, Miki SANS-U

C1-2

MasudaHidekazu Tanaka,伸之, 三宅 岳志, 菊地 帆高

Nobuyuki Kurita, Takeshi
Miyake, Hodaka Kikuchi
Structure characterization of model tetra-

39

小角中性子散乱によるテトラポリアクリル酸ゲル
Li Xiang

東京大学

の構造解析

Gupit Caidric, 辻 優衣, 光
上 義郎

poly(acrylic acid) gel by small-angle neutron

Li Xiang

The University of Tokyo

Gupit Caidric, Yui Tsuji,
Yoshiro Mitsukami
scattering
The elucidation of the internal correlation of star

40

小角中性子散乱を用いた４分岐星型Poly(ethylene

Li Xiang

東京大学辻 優依, 大平 征史

poly(ethylene glycol) with small-angle neutron

glycol)の内部相関の解明

Li Xiang

The University of Tokyo

Yui Tsuji, Masashi Ohirascattering
Takashi Oda, Masaaki
41

タンパク質複合体中の天然変性タンパク質の選択
井上 倫太郎

京都大学

的構造解析

小田 隆, 杉山 正明, 守島

Selective strutural analysis of intrisically diorederd

健, 佐藤 信浩

protein in the protein complex

Rintaro Inoue

Kyoto University

Sugiyama, Ken
Morishima, Nobuhiro
Sato
Masaaki Sugiyama, Reiko

杉山 正明, 裏出 令子, 井上
42

コントラスト変調中性子小角散乱による食品タン

佐藤 信浩

京都大学

パク質複合体の構造解析

倫太郎, 守島 健, 奥田 綾,

Structural analysis of food protein complex by

Nobuhiro Sato

Kyoto University

contrast-variation small-angle neutron scattering
清水 将裕

Urade, Rintaro Inoue, Ken
Morishima, Aya Okuda,
Shimizu Masahiro
Foley Edward, Minoru

Foley Edward, 左右田 稔,
43

中性子小角散乱実験によるSr2RuO4の異常金属状
古川 はづきお茶の水女子大学

態の研究

石田 茜, 中村 琴美, 石田
茜, 奥村 練Anomalous vortex state in Sr2RuO4 studied by

HazukiSANS experiments

Furukawa

Ochanomizu University

Soda, Akane Ishida,
Kotomi Nakamura, Akane
Ishida, Ren Okumura
Minoru Soda, Akane

空間反転対称性の破れた超伝導体のヘリカル磁束44

左右田 稔, 石田 茜, Foley
古川 はづきHerical vortex phase on non-centrosymmetric

Hazuki

お茶の水女子大学

格子の観測

Ochanomizu University
Edward, 伊藤 未希

superconductors

Furukawa

Ito

Evaluation of structures of poly(ethylene45

ポリエチレンカーボネート型新規固体電解質の小
土肥 侑也

名古屋大学

Ohl Michaelcarbonate) solid electrolytes by small-angle neutron Yuya Doi

角中性子散乱測定による構造評価

Nagoya University

Ohl Michael

SANS-U

C1-2

SANS-U

C1-2

SANS-U

C1-2

scattering (SANS) measurements
Shimizu Masahiro, Ken
清水 将裕, 守島 健, 佐藤
46

逆転コントラスト同調中性子小角散乱法によるER-

奥田 綾

京都大学

60/CNX複合体の構造解析

Structural analysis of the ER-60/CNX complex using

信浩, 井上 倫太郎, 裏出 令 inverse contrast-matching small-angle neutron子, 杉山 正明

Aya Okuda

Kyoto University

Morishima, NobuhiroSato, Rintaro Inoue, Reiko

scattering
Urade, Masaaki Sugiyama
Masaaki Sugiyama,

杉山 正明, 井上 倫太郎, 佐47

逆転コントラスト同調中性子小角散乱と超遠心分

守島 健

京都大学

藤 信浩, 奥田 綾, 矢木 宏

析の複合解析による時計蛋白質複合体の構造解明

Integrated structural analysis with inverse contrastmatching small-angle neutron scattering andRintaro Inoue, Nobuhiro
Ken Morishima

Kyoto University

Sato, Aya Okuda,

analytical ultracentrifugation for clock protein
和, 柚木 康弘

Hirokazu Yagi, Yasuhiro
complex

130

Yunoki

Solvent dependence of resorcinarene-based
レゾルシナレン系逆ミセルの構造と触媒活性の相48

Shota Fujii, Tomoki

藤井 翔太, 西村 智貴, 秋葉
櫻井 和朗

北九州市立大学

関関係の解明capsules on their platonic structures and catalytic

Kazuo Sakurai

The University of Kitakyushu

Nishimura, Isamu Akiba,

SANS-U

C1-2

SANS-U

C1-2

SANS-U

C1-2

SANS-U

C1-2

SANS-U

C1-2

SANS-U

C1-2

SANS-U

C1-2

SANS-U

C1-2

SANS-U

C1-2

SANS-UC1-2

勇, 金丸 拓磨
ability

Takuma Kanamaru

Relationship between structures and mechanical
酒井 崇匡, Li Xiang, 大平
49

均一構造を有する過渡的網目の構造・物性評価

片島 拓弥

東京大学

Takuyaproperties of transient networks with uniform

征史

Takamasa Sakai, Li Xiang,
The University of Tokyo

Katashima

Masashi Ohira

network strands

50

環状分子被覆率の均一性が環動ゲルの網目変形挙
眞弓 皓一

東京大学

動に与える影響

乗富 貴子, Liu Chang, 河Effect of homogeneity of ring coverage on network

原 聡平

deformation of slide-ring gels

Koichi Mayumi

The University of Tokyo
Chang, Sohei Kawahara

Liu Chang, Takako
Liu Chang, 乗富 貴子, 河
51

ロバスト強靭化ゲルにおける伸長誘起結晶化の形
眞弓 皓一

東京大学

成メカニズム

原 聡平, 酒井 崇匡, Li

Strain-induced crystallization of tough and robust
Koichi Mayumi

The University of Tokyo

polymer gels
Xiang

Takako Noritomi, Liu

Noritomi, Sohei
Kawahara, Takamasa
Sakai, Li Xiang

コントラストマッチング中性子散乱法によるリン
52

Structural analysis of phospholipid/block copolymer

脂質/ブロックポリマー ハイブリッドベシクルの構 西村 智貴

京都大学

櫻井 和朗, 藤井 翔太, 秋葉勇, 高野 心造解析

hybrid vesicles by contrast-matching SANS
measurements

Tomoki
Kyoto University
NishimuraKazuo Sakurai, Shota Fujii,
Isamu Akiba, Shin Takano
Kodai Aoyama, Reina

53

高圧条件下における2成分混合溶液の新奇な臨界挙貞包 浩一朗

同志社大学

動

54

ポリアルキルスチレン類とポリイソプレンの相溶
高野 敦志

名古屋大学

性評価と相溶化機構の検討

55

一次粒径が異なるフュームドシリカの混合サスペ
鳥飼 直也

三重大学

青山 航大, 荒木田 怜那, 吉 Novel critical behavior in a mixture of water /Koichiro

良 康弘, 後藤 篤子

organic solvent under high-pressure condition

Sadakane

織戸 列, 織戸 烈, 土肥 侑

Evaluation of miscibility of poly(4-也alkylstyrene)/polyisoprene blend systems

池田 莉紗子, 小暮 準才

ンション中における相互分散効果

Interplay of Binary Fumed Silica with Different

Atsushi Takano

Doshisha University

Atsuko Goto

Nagoya University

Naoya Torikai

Mie University

Primary Particle Sizes Dispersed in Suspension

56

吉村 倫一

奈良女子大学

ポソームの 中性子小角散乱を用いた構造解析

矢田 詩歩, 王 珊, 天野 沙耶, 小林 礼実, 水口 裕惠

system of hydrogenated lecithin and nonionicsurfactant using small-angle neutron scattering

Tsuyoshi Orido, Tsuyoshi
Orido, Yuya Doi

Masako Ikeda, Junsai
KogureShiho Yada, Wang Shan,

Structural analysis of liposome formed by mixed
水素添加レシチン／非イオン界面活性剤混合系リ

Arakida, Yasuhiro Kira,

Tomokazu
Nara Women's University
Yoshimura

Saya Amno, Ayami
Kobayashi, Hiroe
Mizuguchi
Masaaki Sugiyama,
Rintaro Inoue, Ken

杉山 正明, 井上 倫太郎, 守Morishima, Koichi

島 健, 眞弓 晧一, 辻 優依,

Mayumi, Yui Tsuji,

大平 征史, 千葉 文野, 伊藤
57

SANS-U（二次元位置測定小角散乱装置）IRT課題

Li Xiang

東京大学大基, 貞包 浩一朗, 土肥 侑 IRT project of SANS-U

Masashi Ohira, Ayano
Li Xiang

The University of Tokyo

Chiba, Hiroki Ito, Koichiro也, 小田 達郎, 花房 明宏,

Sadakane, Yuya Doi,

乗富 貴子, 河原 聡平, 廣井Tatsuro Oda, Akihiro

卓思Hanahusa, Takako
Noritomi, Sohei
Kawahara, Takushi Hiroi

131

Li Xiang, 井上 倫太郎, 日
58

iNSE（中性子スピンエコー分光器)IRT課題

眞弓 皓一

東京大学

野 正裕, 守島 健, 小田 達

Li Xiang, Rintaro Inoue,
IRT project of iNSE

Koichi Mayumi

The University of Tokyo郎

Masahiro Hino, Ken

iNSE

C2-3-1

Morishima,Tatsuro Oda
Junji Inukai, Teppei

犬飼 潤治, 川本 鉄平, 西山

Kawamoto, Hiromichi

アニオン交換型電解質膜に水和した水分子のダイ
59

吉田 亨次

福岡大学

ナミクス測定博通, 白勢 裕登, Solomon Water dynamics in Anion Exchange Membrane

Koji Yoshida

Fukuoka University

Wekesa, Anna Kapulwa

Nishiyama, Yuuto Shirase, AGNES

C3-1-1

Solomon Wekesa, Anna
Kapulwa
Osamu Yamamuro,60

アモルファス水素ハイドレートの水素拡散ダイナ
秋葉 宙

東京大学

ミクス

61

LEA蛋白質の脱水折り畳みに伴うガラス化状態の中川 洋

日本原子力研究開発機構

山室 修, 國澤 昌史, 佐藤

Diffusion dynamics of hydrogen in amorphous

創hydrogen hydrate

味戸 聡志

解析

62

糊化過程における澱粉の水和状態に対する塩の影
中川 洋

日本原子力研究開発機構

澱粉の加熱過程における水の分子運動に対する水中川 洋

日本原子力研究開発機構

味戸 聡志

分量依存性の解析

The University of Tokyo

Analysis of vitrification of LEA protein upon

Hiroshidesiccation-induced folding

Nakagawa

微生物の乾燥耐性機構の解明を目指したガラス転中川 洋

日本原子力研究開発機構

移の水分活性依存性の解析

65

bcc金属水素化物中の水素の量子ダイナミクスの観

川井 清司, 小関 成樹, 曽我

during gelatinization process

Nakagawa

Analysis of dependence of water content on water

Hiroshidynamics in starch during heating

Nakagawa部 知史

古府 麻衣子tolerance mechanism
Observation of quantum dynamics of hydrogen in
日本原子力研究開発機構

測66

ボソンピークを指標とした出土琥珀の産地推定

microorganisms for elucidation of the desiccation

AGNES

C3-1-1

Japan Atomic Energy Agency

Ajito Satoshi

AGNES

C3-1-1

Japan Atomic Energy Agency

Ajito Satoshi

AGNES

C3-1-1

Japan Atomic Energy Agency

Ajito Satoshi

AGNES

C3-1-1AGNES

C3-1-1AGNES

C3-1-1AGNES

C3-1-1AGNES

C3-1-1

Water activity dependent glass transition of64

Masashi Kunizawa,
Hajime Sato

Analysis of effect of salt on hydration state of starch Hiroshi
味戸 聡志

響の解析

63

Hiroshi Akiba

Kiyoshi Kawai, Shigenobu
HiroshiJapan Atomic Energy Agency
Nakagawa

Koseki, Tomochika
SogabeMaiko Kofu

Japan Atomic Energy Agency

Provenance study of excavated amber by the

ShigeoGangoji institute for research of Hiroshi Nakagawa, Naomi

observation of boson peak.

Yamaguchi

cultural property

bcc metal hydrides
山口 繁生

公益財団法人 元興寺文化財研

中川 洋, 植田 直見

究所

Ueda
Hiroshi Akiba, Yoshinori
Ohmasa, Nirei Masami,

秋葉 宙, 大政 義典, 楡井Zhao Yuansheng, Wu

真実, Zhao Yuansheng,
67

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

Wu Xuejun, 山根 崚, 湊 広 IRT project of AGNES章, 関口 峻, 山田 武, 伊藤
華苗, 佐藤 創, 國澤 昌史

Xuejun, Ryo Yamane,
Osamu
Yamamuro

The University of Tokyo

Hiroaki Minato, Shun
Sekiguchi, Takeshi
Yamada, Kanae Ito,
Hajime Sato, Shun Sato,
Masashi Kunizawa

132

Katsuya Hirota, Hirohiko
Shimizu, Tatsushi Shima,

広田 克也, 清水 裕彦, 嶋Hiromoto Yoshikawa,
達志, 吉川 大幹, 吉岡 瑞
68

中性子基礎物理実験のためのデバイス開発

北口 雅暁

名古屋大学

樹, 藤岡 宏之, 藤家 拓大,

Development of neutron devices for fundamental

Masaakiphysics

Kitaguchi

Nagoya University

Tamaki Yoshioka, Hiroyuki

MINE

C3-1-2

Matsuno, Kou Yamaguchi, MINE

C3-1-2

Fujioka,Takuhiro Fujiie,

奥平 琢也, 遠藤 駿典, 河村
Takuya Okudaira,
しほり
Syunsuke Endo, Shihori
Kawamura
Keiji Tanaka, Hiroki Koga,
田中 敬二, 古賀 弘樹, 原田

Rei Harada, Tatsuki Abe,怜, 阿部 建樹, 種子田 英69

中性子反射率測定に基づく気体透過薄膜の収着挙

川口 大輔

九州大学

動に関する研究伸, 松野 寿生, 山口 晃, 川原 啓吾, 川畑 建人, 川野

Hidenobu Taneda, Hisao
Sorption Behavior in Gas Separation Thin Films

DaisukeStudied by Neutron Reflectivity

Kawaguchi

Kyushu University

Keigo Kawahara, Kento

雅恭, 田村 隼太

Kawabata, Masayasu
Kawano, Shunta Tamura70

多層膜性中性子ミラーの高度化と集光デバイス開
日野 正裕

京都大学

小田 達郎, 細畠 拓也

発Development of multilayer neutron mirrors and
Masahiro Hino

Kyoto University

focusing devices

Tatsuro Oda, Takuya
MINE

C3-1-2MINE

C3-1-2MINE

C3-1-2

HQR

T1-1

HQR

T1-1

Hosobata
Takayuki Sumiyoshi,

71

細孔ガラスプレートMPGDを用いた中性子イメー

門叶 冬樹

山形大学

ジング検出器の開発

住吉 孝行, 日野 正裕, 杉山 Development of neutron imager based on hole浩之, 近藤 治靖, 森谷 透

Fuyuki Tokanai

Yamagata University

type MPGD with glass capillary plate

Masahiro Hino, Hiroyuki
Sugiyama, Haruyasu
Kondo, Toru Moriya
Seiji Tasaki, Tatsuro Oda,

田崎 誠司, 小田 達郎, 細畠
72

MINE（京大複合研：多層膜中性子干渉計・反射率
日野 正裕

京都大学

計）IRT課題拓也, 北口 雅暁, 平山 朋

Takuya Hosobata,
MINE (Multilayer neutron interferometer andMasahiro Hino

Kyoto University

reflectometer)子, 中村 吏一朗

Masaaki Kitaguchi,
Tomoko Hirayama,
Riichiro Nakamura
Kambe Takashi, Mizuki

神戸 高志, 宮島 瑞樹, 大山
π電子量子スピン系物質CsO2の結晶構造および磁
73

中野 岳仁

Miyajima, Kenji Ohoyama,

研司, 林 明弘, 紺谷 駿, 原Magnetic and crystal structural studies on π-orbital

島 周平, 岡田 健吾, 三田

quantum spin system CsO2

茨城大学

気構造解析

Akihiro Hayashi, Shun
Takehito Nakano Ibaraki University
Kontani, Shuhei

魁人Harashima, Kengo Okada,
Kaito Mita
Rikako Yamamoto,
Determination of the order parameter of magnetic-

単結晶NdCo2Zn20における磁気揺らぎによる一次74

山本 理香子, 志村 恭通, 岩
鬼丸 孝博

相転移の秩序変数の決定

広島大学

Takahiro
fluctuation-induced first-order transition in

佐 和晃, 下田 愛海
singlecrystalline NdCo2Zn20

Yasuyuki Shimura,
Hiroshima University

Onimaru

Kazuaki Iwasa, Ami
Shimoda133

Kazuaki Iwasa, Keitaro
Kuwahara, Makoto
Yokoyama, Fumitoshi Iga,

岩佐 和晃, 桑原 慶太郎, 横Takehito Nakano, Taro
山 淳, 伊賀 文俊, 中野 岳
Nakajima, Hyuga

仁, 中島 多朗, 西口 日向,

Nishiguchi, Seita Omoto,尾本 星太, 熊田 隆伸, 下田
75

HQR(高分解能中性子散乱装置)IRT課題

大山 研司

茨城大学

愛海, 荒瀬 将太朗, 石﨑 嵩 IRT project of HQR

Kenji Ohoyama

Ibaraki University

Takanobu Kumada, Ami
HQR

T1-1

AKANE

T1-2

Shimoda, Shoutaro Arase,人, 野田 新太, 菅野 友哉,
Takato Ishizaki, Shinta
高野 元輝, 星 翔太, KEIKO
Noda, Tomoya Kanno,
WIDYANISA, 小林 洋大, 富Motoki Takano, Syota
松 優花
Hoshi, KEIKO WIDYANISA,
Youdai Kobayashi, Yuka
Tomimatsu

Yusuke Nambu, Yoichi
Ikeda, Takanori Taniguchi,

76

AKANE（東北大金研：三軸型中性子分光器 ）IRT課
藤田 全基

東北大学

題

南部 雄亮, 池田 陽一, 谷口

Takashi Ino, Takayuki Oku,

貴紀, 猪野 隆, 奥 隆之, 上Yoshiya Uwatoko,Yo

床 美也, 川本 陽, 梅本 好

Kawamoto, Yoshihiko

日古, Xie Peiao, Pang
IRT project of AKANE

Masaki Fujita

Tohoku University

Umemoto, Xie Peiao,

Xiaoqi, Wang Tong, 北澤Pang Xiaoqi, Wang Tong,

崇文, 唐 一飛, 川又 雅広,

Takahumi Kitazawa, Tang

Chen Yizhou, 大里 耕太郎,

Yifei, Masahiro

北山 慎之介

Kawamata, Chen Yizhou,
Koichiro Ohsato,
Shinnosuke Kitayama

77

Magnetic structure of a new Dresselhaus magnet

南部 雄亮

東北大学

Pang Xiaoqi, 川又 雅広

Magnetic structure of a new Dresselhaus magnet

Yusuke Nambu

Tohoku University

Pang Xiaoqi, Masahiro
HERMES T1-3
Kawamata
Daisuke78

カイラル磁性体Ce5Ru3Al2の低温の磁気秩序構造

奥山 大輔

東北大学

佐藤 卓

Magnetic structure of chiral magnet Ce5Ru3Al2

Tohoku University

Taku J SatoHERMES T1-3

Okuyama
79(111)p欠損面を有するペロブスカイト酸化物の結山本 隆文

東京工業大学

長瀬 鉄平, 大見 拓也

晶構造・磁気構造解析
80

中性子粉末回折測定によるベリル中の水分子の量

山根 崚

東京大学

ワイル−近藤半金属を含むトポロジカル希土類物

電気磁気交差相関現象を示すCe3TiSb5の複雑な磁

岩佐 和晃

茨城大学

中性子回折法によるハイパーカゴメ反強磁性体のRyo Yamane

Tokyo Institute of Technology

Magnetic states of topological rare-earth materials

下田 愛海

Teppei Nagase, Takuya
HERMES T1-3
Omi
The University of Tokyo

Osamu Yamamuro,

HERMES T1-3

Hiroshi Akiba
Kazuaki Iwasa

Ibaraki University

Ami Shimoda

HERMES T1-3

including Weyl‒Kondo semimetals
本山 岳

島根大学

場中の磁気構造の解明
83

Yamamoto

paraelectric state of water confined in beryl質における磁気状態
82

Takafumioxide with (111)p defectNeutron powder diffraction study on quantum

山室 修, 秋葉 宙

子常誘電状態の研究
81

Structural and magnetic refinements of perovskite

阿曽 尚文, 篠﨑 真碩, 金城 Magnetic structure studies of complex magnetic
龍廣
気谷 卓

東京工業大学

Gaku Motoyama Shimane University
phases in a magnetoelectric material of Ce3TiSb5
Neutron Diffraction Study of Hyperkagome
川路 均

研究

Antiferromagnets

134

Naofumi Aso, Masahiro
HERMES T1-3
Shinozaki, Tatsuhiro Kinjo
Suguru Kitani

Tokyo Institute of Technology

Hitoshi Kawaji

HERMES T1-3

ミディアムエントロピー合金中の短距離秩序に対84

Impurity effects to the short-range ordering in
池田 陽一

東北大学

梅本 好日古, 藤田 全基

する元素置換効果
新規キタエフ模型候補物質CaCo2TeO6の中性子回
85

Yoshihiko Umemoto,
Yoichi Ikeda

Tohoku University

medium-entropy alloys

HERMES T1-3
Masaki Fujita

Neutron Diffraction on new Kitaev model candidate
浅井 晋一郎

東京大学

益田 隆嗣

折

Shinichiro Asai

The University of Tokyo

Kotaro Fujii

Tokyo Institute of Technology

Takatsugu Masuda

HERMES T1-3

CaCo2TeO6
Masatomo Yashima,

新規酸化物イオン伝導体の結晶構造解析とイオン
86

八島 正知, 張 文鋭, 矢口
藤井 孝太郎

Crystal Structure Analysis and Investigation of Ion

東京工業大学

伝導経路の解明寛, 松崎 航平

Diffusion Path of Novel Oxide-Ion Conductors

ZHANG Wenrui, Hiroshi

HERMES T1-3

Yaguchi, Kohei Matsuzaki
Takanori Taniguchi, Yoich
Ikeda, Motofumi
谷口 貴紀, 池田 陽一, 高濱
87

Tʼ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

元史, 陳 逸舟, 南部 雄亮,
Wang Tong, Xie Peiao,

Relationship between the mechanism of

Takahama, Chen Yizhou,

superconductivity and crystal structure in Tʼ cuprate Masaki Fujita

Tohoku University

oxide

Yusuke Nambu, Wang

HERMES T1-3

Tong, Xie Peiao, Chen

Chen Yizhou, 北山 慎之介
Yizhou, Shinnosuke
Kitayama
Magnetic structure in a heavy fermion
88

電気磁気交差相関現象を示す重い電子系反強磁性
阿曽 尚文

琉球大学

体Ce3TiBi5の磁気構造

89

量子臨界点近傍にあるYbCo2Zn20の置換系試料の本山 岳, 篠﨑 真碩, 金城
龍廣

阿曽 尚文

琉球大学

構造相転移を示すヒドリド導電体A2H3Xの構造解

Gaku Motoyama,
Naofumi Aso

University of the Ryukyus

electromagnetic cross-correlation phenomenon
Crystal structure in doped systems of YbCo2Zn20 in
金城 龍廣

結晶構造
90

antiferromagnet Ce3TiBi5 exhibiting

Masahiro Shinozaki,

HERMES T1-3

Tatsuhiro Kinjo
Naofumi Aso

University of the Ryukyus

Tatsuhiro Kinjo

HERMES T1-3

vicinity of a quantum critical point
陰山 洋

京都大学

析および拡散経路の可視化

生方 宏樹, タッセル セド

Structural analysis of Hydride conductors A2H3X

Hiroshiリック

exhibiting a phase transition

Kageyama

Investigations on the local structure of liquid sulfur

Yoshifumi

at photo-induced polymerization transition

Sakaguchi

Kyoto University

Hiroki Ubukata, Tassel
HERMES T1-3
CedricComprehensive Research

91

液体イオウの光誘起重合転移における局所構造の坂口 佳史

総合科学研究機構

有馬 寛

研究

92

熱電材料122ジントル相の結晶構造

李 哲虎

産業技術総合研究所

木方 邦宏, 小野 圭吾, 和嶋 Crystal structure analysis of thermoelectric
宏虎, 坂上 良介

compounds of 122 Zintl phase

135

Chul-Ho Lee

Organization for Science andHiroshi Arima

HERMES T1-3

Society
National Institute of Advanced

Kunihiro Kihou, Keigo

Industrial Science andOno, Hirotora Wajima,

Technology

Ryosuke Sakagami

HERMES T1-3

Masaki Fujita, Yoichi
Ikeda, Takanori Taniguchi,
Kenji Ohoyama,
Masatomo Yashima,
Kotaro Fujii,Yo

藤田 全基, 池田 陽一, 谷口

Kawamoto, Yoshihiko
貴紀, 大山 研司, 八島 正
Umemoto, Xie Peiao,
知, 藤井 孝太郎, 川本 陽,
Pang Xiaoqi, Wang Ton,
梅本 好日古, Xie Peiao,
Takahumi Kitazawa, Tang
Pang Xiaoqi, Wang Tong,
Yifei, Masahiro

北澤 崇文, 唐 一飛, 川又
93

HERMES（東北大金研：中性子粉末回折装置）IRT
南部 雄亮

東北大学

課題

雅広, Chen Yizhou, 大里

IRT project of HERMES

Yusuke Nambu

Tohoku University

Kawamata, Chen Yizhou,
HERMES T1-3
Koichiro Ohsato,
耕太郎, 北山 慎之介, 宮崎
Shinnosuke Kitayama,司, 岩瀬 裕希, 鈴木 孝行,
Tsukasa Miyazaki, Yuki
渡邊 正理, 大野 真之, 石橋
Iwase, Takayuki Suzuki,
広記, 芦谷 拓嵩, 正木 秀
Masari Watanabe,
知, 成瀬 卓弥, 高濱 元史,
Saneyuki Ohno, Hiroki

大坂 恵一, 佐藤 眞直

Ishibashi, Hirotaka
Ashitani, Hidetomo
Masaki, Takuya Naruse,
Motohumi Takahama,
Keichi Ohsaka, Masugu
Terutoshi Sakakura,
坂倉 輝俊, 山本 孟, 土肥
94

FONDER(中性子4軸回折装置)IRT課題

木村 宏之

東北大学

優紀, 戸田 薫, 上山 幸子,

Hajime Yamamoto, Yuki
IRT proposal for FONDER (Neutron 4-circle
Hiroyuki Kimura

Tohoku University

Dohi, Kaoru Toda, Sachiko

山神 玄蔵, 野田 幸男, 石井 diffractometer)

Kamiyama, Genzo

祐太

Yamagami, Yukio Noda,

FONDER T2-2

Yuta Ishii95

磁気スキルミオン物質Gd2PdSi3における磁気秩序

中島 多朗

東京大学

Magnetic and superlattice structures in a

齋藤 開, Ju Jiwonと超格子構造96

塑性歪みを加えたPt3Fe反強磁性体における強磁性

Taro Nakajima

The University of Tokyo

小林 悟

岩手大学

の発現機構

野村 英志, 松尾 咲琴, 堀田 Mechanism of ferromagnetism in plasticallySatoru侑里

Kobayashi

deformed Pt3Fe antiferromagnet

Iwate University

スピン軌道結合絶縁体Ba2MgReO6における 四極
平井 大悟郎東京大学

佐賀山 基, 室井 利彦

子秩序によって安定化される磁気秩序の研究

98

T'-type Pr2CuO4における結晶構造の還元効果

FONDER T2-2

quadrupolar order in Spin-orbit-coupled insulator

東北大学

Oxygen reduction effect on the crystal structure in
坂倉 輝俊

FONDER T2-2
HajimeDaigorou Hirai

The University of Tokyo

Ba2MgReO6
木村 宏之

Eiji Nomura, Sakoto
Matsuo, Yuri Hotta

Study of magnetic structure stabilized by
97

Hiraku Saito, Ju Jiwon

centrosymmetric skyrmion-host material Gd2PdSi3

Sagayama,Toshihiko

FONDER T2-2

Muroi
Hiroyuki Kimura

Tohoku University

Terutoshi Sakakura

FONDER T2-2

the Tʼ-structure of Pr2CuO4+yTakeru Uchihara, Tatsuya
99

共線磁気構造が介在する一軸応力誘起強誘電相の
探査

満田 節生

東京理科大学

内原 猛, 小澤 竜也, 藤原

Investigation of uniaxial stress-induced ferroelectric

理賀, 玉造 博夢

phase with collinear magnetic structure

Setsuo Mitsuda

Tokyo University of Science

Ozawa, Masayoshi
Fujihara, Hiromu
Tamatsukuri

136

FONDER T2-2

Setsuo Mitsuda, Takashi
Co2+が二等辺デルタ鎖を形成する新物質
100

藤原 理賀

満田 節生, 塚原 隆史, 内原 Investigation of magnetic structure of Co-delta

Masayoshi

猛, 玉造 博夢

Fujihara

東京理科大学

NaCo2(SO4)2Clの磁気構造の解明

Tsukahara, Takeshi
Tokyo University of Science

chain NaCo2(SO4)2Cl

FONDER T2-2
Uchihara, Hiromu
Tamatsukuri
Yoshiya Uwatoko, Ma

上床 美也, Ma Hanmin, 繁 Magnetic structure of antiferromagnetic compound101

反強磁性体eNiC2の磁気構造

郷地 順

東京大学

Hanmin, Toru Shigeoka,
Jun Gouchi

岡 透, 中島 多朗, 齋藤 開

CeNiC2The University of Tokyo

FONDER T2-2
Tar Nakajima, Hiraku
Saito

137

2021年度

播磨分室

軌道放射物性研究施設 共同利用課題一覧 / Joint Research List of Synchrotron Radiation Research Project 2021

※実施課題一覧、所属は申請時のデータ

BL07LSU/Harima Branch BL07LSU
Member of research

No.

課題番号

課題名

氏名

所属

分担者（共同研究者）

Title

Name

Organization

担当所員
project
Daisuke Asakura,Akihiro

朝倉 大輔、大平 昭博、Analysis of hydration structure for organic redox

National Institute of Advanced

佐藤 縁、原田 慈久、舩centers in redox flow batteries under static andOhira,Yukari

Industrial Science and木 敬、張 文雄

Sato,Yoshihisa

electrochemical reactions

Technology

Harada,Takashi

Operando soft X-ray emission spectroscopy of

National Institute of Advanced

レドックスフロー電池における有機酸化還元中心
1 202012-SRBXG-0010

細野 英司

産業技術総合研究所の静置および電気化学反応下での水和構造解析

Eiji Hosono

原田 慈久

Funaki,Humio Chou

2 202012-SRBXG-0007

全固体リチウムイオン電池を用いた電極材料のオ
朝倉 大輔

産業技術総合研究所

細野 英司、石山 智大、

ペランド軟X線発光分光

小林 正起

Co2MnZ (Z = Ge and Ga)ホイスラー合金バルク単藤原 秀紀、菅 滋正、笠electrode materials by using all-solid-state Li-ion

Daisuke Asakura Industrial Science andbattery

Technology

Eiji Hosono,Tomohiro
Ishikawa,Masaki

原田 慈久

Kobayashi
HidekiHalf-metallic electronic states of bulk-single crystal

Fujiwara,Shigemasa

Co2MnZ (Z = Ge and Ga) Heusler alloys probed by
3 202012-SRBXG-0004

結晶の磁場中共鳴非弾性軟X線散乱(SX-RIXS)による 梅津 理恵

東北大学

ハーフメタル型電子状態の解明

原 理加、西岡 拓真、宮Rie Umetu

Tohoku University

resonant inelastic soft X-ray scattering (SX-RIXS) in
脇淳

二次電池の高エネルギー密度化を目指した酸化物
大久保 將史東京大学

Study on oxygen-redox reaction mechanism in oxide
朝倉 大輔

電極における酸素レドックス反応の機構解明

原田 慈久

Kasahara,Takuma
magnetic field

4 202012-SRBXG-0013

Suga,Rika

Nishioka,Jun Miyawaki

Masashi Okubo The University of Tokyo

Daisuke Asakura

原田 慈久

cathodes for higher energy-density batteries
Maiko Nishibori,Akira
西堀 麻衣子、宮野 陽、

軟X線発光分光法による二酸化炭素分離膜中での5 202012-SRBXG-0015

Miyano,Kakeru
Analysis of Sorption State of Carbon Dioxide in

高原 淳

九州大学

CO2の収着状態評価

Atsushi

二宮 翔、松野 亮介、小椎尾 謙、藤川 茂紀

Kyushu University
Separation Membrane

Takahara

Ninomiya,Ryousuke

原田 慈久

Matsuno,Ken
Kojio,Shigenori Fujikawa

6 202012-SRBXG-0025

高分子電解質膜中の水分子電子状態に関する研究

倉橋 直也

山添 康介、UGALINO

Study on electronic state of water molecules in

RALPH

polymer electrolyte membranes.

原田 慈久、倉橋 直也、Coherence Effect of Intermediate State in Resonant

東京大学物性研究所

The Institute for Solid State

Kousuke

Naoya Kurahashi

原田 慈久
Physics, The University of Tokyo Yamazoe,Ugalino Ralph
Yoshihisa Harada,Naoya

共鳴非弾性軟X線回折における中間状態のコヒーレ
7 202012-SRBXG-0016

宮脇 淳

量子科学技術研究開発機構

ンス効果

National Institutes for Quantum
Jun Miyawaki

山添 康介

Inelastic Soft X-ray Diffraction

Kurahashi,Kousuke
Science and Technology

原田 慈久

Yamazoe
Yoshihisa
Harada,Masaharu

原田 慈久、尾嶋 正治、
三次元走査型光電子顕微鏡を利用した微粒子光触8 202012-SRBXG-0017
媒の電子状態の解析

Oshima,Naoka
Analysis of electronic states of particulate

久富 隆史

信州大学

Takashi

永村 直佳、張 文雄、吉成 朝子、竹澤 伸吾

Shinsyu University
photocatalysts by 3D nano-ESCA

Hisatomi

Nagamura,Humio
Chou,Asako
Yoshinari,Shingo
Takezawa

138

原田 慈久

Masaharu
Oshima,Masato
尾嶋 正治、小嗣 真人、Development of operando electric potential
顕微分光を活用した原子層シートのポイントプ
9 202012-SRBXG-0018

矢治 光一郎、吉成 朝
永村 直佳

物質・材料研究機構

ローブ電場印加オペランド電位分布計測技術開発

Kotsugi,Koichiro
Naoka

National Institute for Materials

Nagamura

Science

distribution analysis technique of atomic layer nano
子、竹澤 伸吾、津田 俊

Yaji,Asako

sheets with point-probe using spectromicroscopy

原田 慈久

Yoshinari,Shingo

輔、大石 健太

Takezawa,Shunsuke
Tsuda,Kenta Oishi

10 202012-SRBXG-0022

11 202012-SRBXG-0023

RIXS-MCD Study of Chromium Trihalides
Investigation of electronic structure of Fe-Co spinels

原田 慈久

原田 慈久

東京大学物性研究所

東京大学物性研究所

RIXS-MCD Study of Chromium Trihalides

宮脇 淳

by 2p3d RIXS and L-edge XAS
12 202106-SRBXG-0054

セルロースの分子間/分子内水素結合と水の役割の原田 慈久

東京大学物性研究所

倉橋 直也、木内 久雄

解明Yoshihisa

The Institute for Solid State

HaradaPhysics, The University of Tokyo

Investigation of electronic structure of Fe-Co spinels Yoshihisa

The Institute for Solid Stateby 2p3d RIXS and L-edge XAS

HaradaPhysics, The University of Tokyo

Elucidating the intermolecular/intramolecular

Yoshihisa

The Institute for Solid Statehydrogen bonding and the role of water in cellulose Harada

原田 慈久

Jun Miyawaki
Naoya Kurahashi,Hisao

原田 慈久

原田 慈久
Physics, The University of Tokyo Kiuchi
Yoshihisa Harada,Jun

原田
13 202105-SRBXG-0034

角度分解軟X線発光分光法の開拓

倉橋 直也

東京大学物性研究所

張

慈久、宮脇
文雄、山添

淳、

UGALINO

Miyawaki,Humio

康介、 Development of angle-resolved soft X-ray emission
Naoya Kurahashi

RALPH、寳田 spectroscopy

The Institute for Solid State
Physics, The University of Tokyo唯以

14 202106-SRBXG-0035

藤田 全基

東北大学

電荷秩序および電荷励起

原田 慈久

Yamazoe,Ugalino
Ralph,Yui Hoda

谷口
T*構造ホールドープ型銅酸化物超伝導体におけるChou,Kousuke

貴典、北山介、谢 佩翱、王 彤、原田Takanori
慎之
Charge order and excitations in T*-type hole-doped
Masaki Fuiita

Tohoku University

cuprate superconductors

慈久

Taniguchi,Shinnosuke
原田 慈久
Kitayama,Shiie Peiao,Wan
Ton,Yoshihisa Harada

Operando soft X-ray emission spectroscopy of
15 202106-SRBXG-0038

全固体リチウムイオン電池を用いた電極材料のオ
朝倉 大輔

産業技術総合研究所

ペランド軟X線発光分光 2

細野 英司、石山 智大、
小林 正起

electrode materials by using all-solid-state Li-ion

National Institute of Advanced
Daisuke Asakura Industrial Science andbattery 2

Technology

Eiji Hosono,Tomohiro
Ishikawa,Masaki

原田 慈久

Kobayashi
Yoshihisa Harada,Keito

原田 慈久、荒川16 202106-SRBXG-0039

マルチフェロイックCuOの反強磁性相におけるア

木村 剛

東京大学

ナポール秩序観測およびその電場印加効果

三澤

慶人、

龍介、田中

和、宮脇

良

淳、上田

Observation of anapole order and their electricfield-induced effect in antiferromagnetic phases of

Arakawa,Ryusuke
Tsuyoshi Kimura The University of Tokyo

Misawa,Yosikazu

原田 慈久

大
multiferroic CuOTanaka,Jun

貴Miyawaki,Hiroki Ueda
Study on the electronic structure of oxyfluoride
共鳴非弾性 X 線散乱法を用いた全固体フッ化物電17 202106-SRBXG-0044

Kentaro山本 健太郎

京都大学

原田

慈久、木内

久雄 cathode for all-solid-state fluoride ions batteries by

池酸フッ化物正極の電子状態分析

resonant inelastic X-ray scattering

Yoshihisa Harada,Hisao
Kyoto University

Yamamoto

原田 慈久
KiuchiObservation of local structure of water confined in a
18 202106-SRBXG-0050

温度応答性高分子ブラシ内の水分子の構造解析

長瀬 健一

慶應義塾大学原田慈久

Kenichi Nagase

Keio University

Yoshihisa Harada

原田 慈久

thermoresponsive polymer brush
Masaharu
尾嶋 正治、小嗣 真人、
19 202106-SRBXG-0051

顕微分光を活用した原子層シートのポイントプ

永村 直佳

物質・材料研究機構

吉成 朝子、竹澤 伸吾、

ローブ電場印加オペランド電位分布計測技術開発II

Development of operando electric potential
Oshima,Masato
distribution analysis technique of atomic layer nano Naoka

National Institute for Materials

sheets with point-probe using spectromicroscopy

Science大石 健太

Nagamura

Kotsugi,,Asako
Yoshinari,Shingo

(II)

139

Takezawa,Kenta Oishi

原田 慈久

Masaharu
尾嶋 正治、永村
20 202106-SRBXG-0048

高際 良樹

物質・材料研究機構

Oshima,Nagamura

直佳、 Electronic state analysis of earth-abundant Fe‒Al‒

顕微分光による新奇合金系熱電材料”FAST材”の電
小嗣 真人、吉成 朝子、National Institute for Materials

Naoka,Masato

Takagiwa

Science

Kotsugi,,Asako

Si thermoelectric (FAST) materials using scanning子状態解析
竹澤 伸吾、大石 健太

Yoshiki

原田 慈久

photoelectron microscopy
Yoshinari,Shingo
Takezawa,Kenta Oishi

原田 慈久、宮脇
21 202106-SRBXG-0059

共鳴軟X線非弾性散乱による銅結合タンパク質の電藤井 健太郎量子科学技術研究開発機構

子状態解析

橋 直也、安達谷

Yoshihisa Harada,Jun

淳、倉 Analysis for Electronic States of Cu-binding Proteins
基泰、横 using Resonant Inelastic X-ray Scattering

明徳

Kentaro Fujii

National Institutes for Quantum Miyawaki,Naoya
Science and Technology
Spectroscopy

原田 慈久
Kurahashi,Motoyasu
Adachi,Akinari Yokoya

22 202012-SRBXG-0008

オペランド光電子分光によるパラジウム金合金の小板谷 貴典
水素吸蔵過程のリアルタイム観測
23 202012-SRBXG-0014

分割クロスアンジュレータを用いた新たなX線線２

自然科学研究機構

分子科学研

Real-time observation of hydrogen absorption in

究所
小嗣 真人

東京理科大学

Takanori Koitaya Institute for Molecular Science松田 巌

Pd-Au alloys by operando XPS
Development of novel XMCD method by using松田 巌

色性実験法の開発

Masato Kotsugi

Tokyo University of Science

Iwao Matsuda

The Institute for Solid State

Kozo Mukai,Fumihiko

松田 巌segmented cross undulator
Electronic states of functional materials induced by

24 202012-SRBXG-0026

雰囲気軟X線光電子分光による水素の吸脱着過程に
吉信 淳

東京大学物性研究所

伴う機能性材料の電子状態の研究

向井 孝三、尾崎 文彦、hydrogen adsorption/desorption studied by田中 駿介

ambient pressure soft X-ray photoelectron

Jun Yoshinobu

松田 巌
Physics, The University of Tokyo Ozaki,Syunsuke Tanaka

spectroscopy
Determination of the complex permittivity of FeCo
25 202012-SRBXP-0027

高速偏光スイッチングを利用した磁気光学測定に
平田 靖透

防衛大学校

松田 巌、三輪 真嗣

alloy thin film by magneto-optical measurement

よる鉄コバルト合金薄膜の複素誘電率の決定

Yasuyuki Hirata

using fast polarizationswitching

National Defense Academy of

Iwao Matsuda,Shinji

Japan

Miwa

松田 巌

Jun Yoshinobu,Iwao
Matsuda,Takanori
吉信

淳、松田

板谷

貴典、田中

介、向井

巌、小

Koitaya,Syunsuke

駿Tanaka,Kozo

渉、崔

孝三、長田

Mukai,Wataru Osada,Che

永賢、杉山

正

Yonhyun,Masakazu
Next Generation Catalysis Science Opened by

26 202103-SRBXS-0030

軟X線オペランド計測の高度化が拓く次世代触媒科

山本

達

東北大学

学

和、佐藤

正寛、今関

裕貴、小林

正起、武田

崇仁、堀尾

眞史、佐藤

祐輔、趙

Sophistication of Operando Soft X-ray
Spectroscopies

SusumuTohoku University

Yamamoto

松田 巌

Sato,Yuki Imazeki,Masaki
Kobayashi,Takahito

宇豪、工藤

佳生、鷲見

Sugiyama,Masahiro

Takeda,Masafumi

寿秀、和田Horio,Yusuke Sato,Chou

哲弥

Ugo,Yoshio
Kudo,Toshihide
Sumi,Tetsuya Wada
Next Generation Catalysis Science Opened by

軟X線オペランド計測の高度化が拓く次世代触媒科
27 202103-SRBXS-0030

Susumu山本

達

東北大学

Sophistication of Operando Soft X-ray

学
Spectroscopies

140

Tohoku University
Yamamoto

松田 巌

Iwao Matsuda,Yoshitika
松田

巌、大谷

堀尾

眞史、妹尾

義近、 Orbital torque in CoFe/Cu/Al2O3: Revealing the

CoFe/Cu/Al2O3における軌道トルク: 重金属を用い
28 202106-SRBXG-0033

Otani,Masafumi
金 俊延

理化学研究所共mechanism of giant magnetic-torque generation

Kimu Junyon

Riken

ない巨大磁気トルクの起源解明

松田 巌
Horio,Tomoaki Senoo,Yuki

晃、辻川

夕貴

without heavy metals
Tujikawa
Iwao Matsuda,Tomoaki

異常ホール効果を示すVNb3S6における磁気状態の
29 202106-SRBXG-0036

松田
堀尾 眞史

回転直線偏光を用いた強磁性単原子層薄膜の共鳴
光電子分光：磁性制御パラメータとしての界面軌

山本 航平

自然科学研究機構

分子科学研

究所
道混成

共晃、 Unambiguous elucidation of the magnetic state of

The Institute for Solid State
Masafumi Horio

徹底解明

30 202106-SRBXG-0040

巌、妹尾

東京大学物性研究所
鷲見

寿秀、和田

松田

巌、小森

堀尾

哲弥 the anomalous Hall-effect compound VNb3S6

文夫、

眞史、和田

弥、工藤

哲

佳生

Senoo,Toshihide
Physics, The University of Tokyo

Resonance photoemission spectroscopy of松田 巌

Sumi,Tetsuya Wada
Iwao Matsuda,Fumio

monolayer ferromagnetic films using rotational

Kohei

linear polarization: interfacial orbital hybridization

Yamamoto

Institute for Molecular Science

Komori,Masafumi

松田 巌

Horio,Tetsuya

as a control parameter of magnetism

Wada,Yoshio Kudo,

Operando ambient pressure photoelectron
31 202106-SRBXG-0046

機能化したMoS2基底面およびエッジ面の評価と化
吉信 淳

東京大学物性研究所

学反応のオペランド雰囲気光電子分光による研究

向井 孝三、尾崎 文彦、
田中 駿介

spectroscopy of chemical reaction on the

Jun Yoshinobu

The Institute for Solid State

Kozo Mukai,Fumihiko
松田 巌

Physics, The University of Tokyo Ozaki,Syunsuke Tanaka

functionalized basal and edge surfaces of MoS2

Yoshihisa Harada,Iwao
Matsuda,Mari

32 202012-SRBXS-0009

次世代光源に向けた全反射ウォルターミラーを利木村隆志

東京大学物性研究所

用した新規X線イメージング技術の開発

原田

慈久、松田

巌、 Development of Novel X-ray Imaging Technology

志村

まり、三村

秀

和、江川

悟

using Total Reflection Walter Mirror for Next

Shimura,Hidekazu
Takashi Kimura

The Institute for Solid State
Physics, The University of Tokyo

Generation Light Source.

Mimura, Satoru

木村

隆志

木村

隆志

Egawa,Noboru
Furuya,Yoko Takeo,Kai
Sakurai

33 202012-SRBXS-0009

次世代光源に向けた全反射ウォルターミラーを利木村 隆志

東京大学物性研究所

用した新規X線イメージング技術の開発

原田

慈久、松田

巌、

志村

まり、三村

秀

和、江川
登、竹尾

悟、古谷
陽子、櫻井

Yoshihisa Harada,Iwao
Development of Novel X-ray Imaging Technology
using Total Reflection Walter Mirror for Next

Takashi Kimura

The Institute for Solid State

Matsuda,Mari

Physics, The University of Tokyo Shimura,Hidekazu

Generation Light Source.

Mimura, Satoru Egawa
快柏キャンパスE棟/Laser and Synchrotron Radiation Laboratory in Kashiwa
No.

課題番号

課題名

氏名

所属

分担者

Title

Name

Organization

Member of research
project

1

Spin measurement of 2m-WS 2

Huh, Soonsang

東京大学物性研究所

2

Zr3SnC 2のスピン分解角度分解光電子分光

伊藤

名古屋大学

Spin measurement of 2m-WS 2

Soonsang Huh

The University of Tokyo

Takahiro Ito

Nagoya University

Kaname Kanai

Tokyo University of Science

Yuxuan Wan

The University of Tokyo

Spin- and Angle-resolved photoemission study of孝寛

Zr3SnC 23有機分子/貴金属界面におけるラシュバ分裂の増大 金井要

Enhancement of Rashba splitting on organic

東京理科大学

molecule/noble metal interface
Electronic states of topological semimetals studied
4

スピン・角度分解光電子分光によるトポロジカル
万 宇軒

東京大学

by spin- and angle-resolved photoemission

半金属の電子状態の研究

5

レーザースピン角度分解光分光による表面電子状

spectroscopy
矢治

光一郎

SARPES studies of atomic layer materials at

物質材料研究機構

態の研究

surfaces

141

Koichiro Yaji

National Institute for Materials
Science

担当所員

Pb系トポロジカル絶縁体のスピン角度分解光電子
6National Institute for Materials
矢治

光一郎

物質材料研究機構

SARPES study of a Pb-based topological insulator

Koichiro Yaji

分光

Science
Observation of NQP state in half metal

バルク敏感高分解能スピン分解角度分解光電子分
7

光によるハーフメタル強磁性体La 1-xSrxMnO 3の

横谷

尚睦

岡山大学

ferromagnet La 1-xSrxMnO 3 by bulk sensitive high-Takayoshi

resolution spin and angle resolved photoemission

Yokoya

NQP状態の観測
spectroscopy

142

Okayama University2021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 2021

※採択課題一覧、所属は申請時のデータ

1. 第一原理計算 / First-Principles Calculation of Materials Properties
No.

課題番号

課題名

氏名

所属

量子論大規模計算による半導体薄膜成長とデバイ
1 2021-Ea-0004

押山淳

量子論大規模計算による半導体薄膜成長とデバイ
押山淳

固液界面における電気化学反応シミュレーション

水素の機能性に関する第一原理計算

Device-Interface Formation by Large-Scale Quantum-Theory-Based Computations

Oshiyama

Clarification of Microscopic Mechanisms of Semiconductor Epitaxial Growth andAtsushi

Device-Interface Formation by Large-Scale Quantum-Theory-Based Computations

Oshiyama

実

Organization
Institute of Materials and Systems for Sustainability

Institute of Materials and Systems for Sustainability
Development and Application of electrochemical-reaction simulation methods at

大谷筑波大学計算科学研究センター

Center for Computational Sciences, The University
Minoru Otani手法の開発とその応用
4 2021-Ea-0006

Atsushi名古屋大学未来材料・システム研究所

ス界面形成の微視的機構解明
3 2021-Ea-0005

Name

Clarification of Microscopic Mechanisms of Semiconductor Epitaxial Growth and名古屋大学未来材料・システム研究所

ス界面形成の微視的機構解明
2 2021-Eb-0005

Title

the solid/solution interfacesof Tsukuba

杉野修

東京大学物性研究所

First-principles calculation of functionality of hydrogen

Osamu Sugino

Institute for Solid State Physics, University of Tokyo

杉野修

東京大学物性研究所

First-principles prediction of stability and functionality of complex materials

Osamu Sugino

Institute for Solid State Physics, University of Tokyo

大野

かおる

横浜国立大学大学院工学研究院

Improvement and application of all-electron mixed basis program

Kaoru Ohno

酸化物等複雑物質の安定性と機能性予測のための
5 2021-Eb-0001
第一原理計算Graduate School of Engineering, Yokohama
6 2021-Ca-0098

全電子混合基底法プログラムの改良と応用

National University
7 2021-Ca-0118
8 2021-Ca-0063
9 2021-Cb-0022

量子シミュレーションによる動的不均一触媒理論
第一原理計算による新規蓄電デバイス材料の解析
フラッシュメモリ応用を目指したSi3N4中のN空孔

森川良忠

大阪大学 大学院工学研究科 物理学系専攻

Yoshitada

Department of Precision Engineering, Graduate

Morikawa

School of Engineering, Osaka University
Faculty of Engineering, The University of Tokyo

Quantum simulations on dynamical heterogeneous catalysts

山田淳夫

東京大学工学系研究科

First principles analysis on novel energy storage device materials

Atsuo Yamada

白石

賢二

名古屋大学

First Pricnciples Study of N Vacancies in Si3N4 for Flash Memory Application

Kenji Shiraishi

未来材料・システム研究所の第一原理計算による研究
10 2021-Ca-0101

高密度水素を用いた超機能性材料の機構解明と理Nagoya University
常行

真司

東京大学大学院理学系研究科物理学専攻

論予測
11 2021-Cb-0030

表面、界面、欠陥等の複雑構造における原子構造

12 2021-Ca-0001

渡邉聡

第一原理GW+Bethe-Salpeter法によるXAS計算

Shinji Tsuneyuki Department of Physics, University of Tokyo下條冬樹

東京大学大学院工学系研究科マテリアル工学専 Analyses related to atomic structures and atom dynamics at complex structures

Satoshi

Department of Materials Engineering, School of

攻WatanabeEngineering, The University of Tokyo

Fuyuki Shimojo

Department of Physics, Kumamoto University

such as surfaces, interfaces and defects
First-Principles Molecular-Dynamics Study of Structural and Electronic Properties of

熊本大学大学院先端科学研究部と電子状態の第一原理計算
13 2021-Ca-0018

Elucidation of mechanism and theoretical prediction of super-functional materials
using high-density hydrogenと原子ダイナミク スに関する解析
高圧力下における共有結合性液体・ガラスの構造

Institute of Materials and Systems for Sustainability,

Covalent Liquids and Glasses under Pressure
野口良史

静岡大学工学部

XAS simulations by first-principles GW+Bethe-Salpeter method

Yoshifumi
Graduate School of Engineering, Shizuoka University
Noguchi
14 2021-Ca-0068

Bayes最適化を用いた界面電気磁気結合の最大化

合田義弘

東京工業大学物質理工学院材料系

Maximization of interface magnetoelectric coupling with Bayesian optimization

Yoshihiro Gohda

Department of Materials Science and Engineering,Tokyo Institute of Technology
15 2021-Ca-0075

機械学習を用いた結晶構造探索手法の開発

山下智樹

長岡技術科学大学

Development of crystal structure prediction methods using machine learning

Tomoki
Nagaoka University of Technology
Yamashita
16 2021-Ca-0100

パワー半導体における界面欠陥構造の特定とその松下雄一郎

東京工業大学低減法の提案: 第一原理計算からのアプローチ
17 2021-Ca-0048

次世代スピントロニクス応用に向けたトポロジカ
山内邦彦

大阪大学工学研究科

ル界面の第一原理設計
18 2021-Ca-0069

遷移金属化合物における電子局在化の第一原理計

レービガー

算

ンネス

ハ 横浜国立大学

大学院工学研究院

物理工学

Identification of interface-state defects in power semiconductors: Approach from

Yu-Ichiro

ab-initio calculations

Matsushita

First-principles design of topological interfaces toward next-generation spintronics

Kunihikoapplication

YamauchiFirst principles theory of carrier localization in transition metal compounds
コース

HannesRaebiger

143

Tokyo Institute of Technology

Graduate School of Engineering Osaka University

Department Physics, Yokohama National University

19 2021-Ca-0072

不規則物質系の超イオン伝導性

笠松秀輔

山形大学学術研究院

Understanding superionic conduction in disordered materials systems

ShusukeAcademic Assembly, Yamagata University

Kasamatsu
20 2021-Ca-0070

固体中ミュオンの第一原理計算

斎藤峯雄

金沢大学理工研究域数物科学系

First-principles calculations on muon in solids

Mineo Saito

Division of Mathematical and Physical Sciences
Kanazawa University

21 2021-Ca-0112

第一原理電子状態・輸送特性計算コードRSPACEの小野倫也

神戸大学大学院工学研究科電気電子工学専攻

開発とデバイスシミュレーション
22 2021-Cb-0006

三元系最密充填構造に基づく結晶構造探索

Development of first-principles electronic-structure and transport calculation code

Tomoya Ono

RSPACE and simulations for device
尾崎泰助

東京大学物性研究所

Prediction of new crystal structures based on the densest ternary sphere packings

Department of Electrical and Electronic Engineering,
Graduate School of Engineering, Kobe University

Taisuke Ozaki

Institute for Solid State Physics, The University ofTokyo

23 2021-Cb-0052

機械学習ポテンシャル分子動力学計算による不規

笠松

秀輔

Understanding superionic conductivity in disordered systems using machine learning Shusuke

山形大学学術研究院

則物質系の超イオン伝導性の解明
24 2021-Ca-0052

表面、界面、欠陥等の複雑構造における原子構造

potential molecular dynamics
渡邉

聡と原子ダイナミクスに 関する解析
25 2021-Cb-0031

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

Academic Assembly, Yamagata University

Kasamatsu

東京大学大学院工学系研究科マテリアル工学専 Analyses related to atomic structures and atom dynamics at complex structures

Satoshi

Department of Materials Engineering, School of

攻WatanabeEngineering, The University of Tokyo

such as surfaces, interfaces and defects

大阪大学工学研究科

Analysis of Surface Reactions in Atomic Layer Etching Processes

Satoshi

Graduate School of Engineering, Osaka University

Hamaguchi
26 2021-Ca-0091

大規模界面構造における第一原理電子輸送計算手

江上喜幸

Development and application of first-principles method for electron-transport

北海道大学大学院工学研究院

法の開発と応用
27 2021-Ca-0003

機械学習を用いた環境発電用ポリマーエレクト鈴木雄二

東京大学大学院工学系研究科機械工学専攻

レット材料の開発
28 2021-Ca-0061

原子層エッチングプロセスにおける表面反応解析

Yoshiyuki Egami Faculty of Engineering, Hokkaido University

calculations of large-scale interface structures
Development of Polymer Electret Materials for Energy Harvesting Using Machine

Yuji Suzuki

Learning
浜口智志

大阪大学工学研究科

Analysis of Surface Reactions in Atomic Layer Etching Processes

Dept. of Mechanical Engineering, The University ofTokyo

Satoshi

Graduate School of Engineering, Osaka University

Hamaguchi
National Institutes of Natural Sciences AstroBiology
29 2021-Ca-0109

氷惑星・氷衛星内部の熱力学的状態の統一的理解小松勇

自然科学研究機構アストロバイオロジーセン

A unified understanding of thermodynamic properties in icy planets and icy moons

Yu Komatsu

ター＆国立天文台

30 2021-Cb-0040

半導体界面構造における第一原理電子輸送研究

江上喜幸

Center & National Astronomical Observatory ofJapanFirst-principles study on electron-transport through semiconductor interface

北海道大学大学院工学研究院

Yoshiyuki Egami Faculty of Engineering, Hokkaido University

structures
31 2021-Cb-0045

パワー半導体における界面欠陥構造の特定とその

松下

雄一郎

東京工業大学低減法の提案: 第一 原理計算からのアプローチ

Identification of interface-state defects in power semiconductors: Approach from

Yu-Ichiro

ab-initio calculations

Matsushita

Tokyo Institute of Technology
Center for Advanced Research of Energy and

32 2021-Ca-0019

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

附属エネル

ギー・マテリアル融合領域研究センター

33 2021-Cb-0048

第一原理電子状態・輸送特性計算コードRSPACEの小野倫也

神戸大学大学院工学研究科電気電子工学専攻

開発とデバイスシミュレーション
34 2021-Ca-0080

金属絶縁体超格子熱電材料の機械学習の最適化

Reduction of Rare Metals in Formic Acid Decomposition Catalysts and Oxygen

Yuji Kunisada

Storage Materials
Development of first-principles electronic-structure and transport calculation code

University
Tomoya Ono

RSPACE and simulations for device
邵成東京大学機械工学塩見研究室

Machine-learning optimization of metal-insulator superlattice thermoelectric

35 2021-Ca-0119

石井史之

金沢大学ナノマテリアル研究所

ホール伝導度の第一原理計算
36 2021-Cb-0001

高圧力下における共有結合性液体‧ガラスの構造とCheng Shao

量子シミュレーションによる動的不均一触媒理論

Shiomi Lab, Mechanical engineering, The Universityof Tokyo

Fumiyuki Ishii

Kanazawa University

Fuyuki Shimojo

Department of Physics, Kumamoto University

Yoshitada

Department of Precision Engineering, Graduate

Morikawa

School of Engineering, Osaka University

Energy Conversion Materials
下條冬樹

熊本大学大学院先端科学研究部

電子状態の第一 原理計算
37 2021-Eb-0007

First-Principles Calculation of Spin Splitting and Anomalous Hall Conductivity in

Department of Electrical and Electronic Engineering,
Graduate School of Engineering, Kobe University

materials
エネルギー変換物質におけるスピン分裂と異常

Materials, Faculty of Engineering, Hokkaido

First-Principles Molecular-Dynamics Study of Structural and Electronic Properties of
Covalent Liquids and Glasses under Pressure

森川良忠

大阪大学 大学院工学研究科 物理学系専攻

Quantum Simulations on Dynamical Heterogeneous Catalysts

144

38 2021-Ca-0086

分子接合の第一原理伝導計算

大戸達彦

大阪大学大学院基礎工学研究科

First-principles transport calculations for single-molecular junctions

Tatsuhiko Ohto

Graduate School of Engineering Science, Osaka
University

39 2021-Cb-0041

新奇熱電物質における欠陥形成に関する第一原理

黒木

和彦

大阪大学

白石

賢二

名古屋大学

First principles study on defect formations in new thermoelectric materials

Kazuhiko KurokiFirst principles studies of impurity-dislocation complexes in GaN

Kenji Shiraishi

First-principles study on charging-induced structure phase transitions of thin film

TakashioxidesNakayama

Low Thermal Conductance Generated by van der Waals Interaction

Masato Ohnishi

Osaka University

計算による研究40 2021-Ca-0027

GaN中の転位と不純物の複合体の第一原理計算に

未来材料・システム研究所

よる研究
41 2021-Ca-0066

帯電が誘起する薄膜酸化物の構造相転移：第一原

Nagoya University
中山隆史

千葉大学理学部物理学科

理計算による研究42 2021-Ca-0058

van der Waals 相互作用が生み出す低熱伝導

Institute of Materials and Systems for Sustainability,

大西

正人

東京大学機械工学専攻

Department of Physics, Chiba University
Department of Mechanical Engineering, The
University of Tokyo

43 2021-Ca-0108

44 2021-Cb-0011

45 2021-Ca-0085

ナノ構造の量子伝導の第一原理計算
機械学習を用いた環境発電用ポリマーエレクト

小林

伸彦

鈴木

雄二

筑波大学 数理物質系

物理工学域

東京大学大学院工学系研究科機械工学専攻

47 2021-Ca-0028

48 2021-Ca-0111

49 2021-D-0008

Development of Polymer Electret Materials for Energy Harvesting Using Machine

レット材料の開発

Learning

密度汎関数法と溶液理論を用いた電気化学反応のElectrochemical reaction analysis using density functional calculation + implicit

春山

潤

東京大学物性研究所

解析 3
46 2021-Ca-0087

First-principles study of quantum transport in nanostructures

遷移金属合金の磁気熱量効果
人工ニューラルネットワーク力場構築のための効

NobuhikoDepartment of Applied Physics, University of

Kobayashi

Tsukuba

Yuji Suzuki

Tokyo
Jun Haruyama

solvation model 3
小口多美夫

大阪大学産業科学研究所

Magnetocaloric Effect of Transition-Metal Alloys

Dept. of Mechanical Engineering, The University of

Institute for Solid State Physics, The University ofTokyo

Tamio Oguchi

ISIR, Osaka University

Study of Efficient Training Data Generation Method for Constructing Artificial Neural Kohei

Faculty of Advanced Science and Technology,

率的な学習データ生成法の模索III

Network Force Field III

Shimamura

Kumamoto University

高分子系有機半導体の電子状態・界面準位の第一First-principles investigation on the electronic properties of polymer organic

SusumuDepartment of Physics and Earth Sciences, Faculty

原理的研究

semiconductors

Yanagisawaof Science, University of the Ryukyus

π電子−プロトン相関型分子性導体群の圧力下構

Systematic elucidation of structure and electronic state of π-electron-proton

島村

孝平

柳澤

将

出倉

駿

熊本大学大学院先端科学研究部

琉球大学理学部物質地球科学科物理系

東京大学物性研究所

造及び電子状態の系統的予測

Shun Dekura

coupled molecular conductors under pressure

Institute for Solid State Physics, The University ofTokyo
Center for Advanced Research of Energy and

50 2021-Cb-0010

51 2021-Ca-0084

燃料電池電極触媒及び水素透過膜の省貴金属化

還元CeO$̲{2}$（100）上での水の反応による水素

坂口

横

紀史

哲

北海道大学大学院工学研究院

附属エネル

Reduction of Rare Metals in Fuel Cell Catalysts and Hydrogen Permeable

Norihito

ギー・マテリアル融合領域研究センター

Membrane

Sakaguchi

東北大学材料科学高等研究所

Hydrogen formation by reaction of water on reduced CeO$̲{2}$ (100) surface

Akira Yoko

Materials, Faculty of Engineering, Hokkaido
University
WPI-AIMR, Tohoku University

生成
52 2021-Cb-0012

53 2021-Ca-0024

高機能スピントロニクス磁性材料の電子構造解析

小田竜樹

金沢大学理工研究域数物科学系

Structure stability and electronic structures of point defects in wide-gap oxide

Hiroyoshi

Institute of Scientific and Industrial Research, Osaka

materials

MomidaUniversity

SusumuDepartment of Physics and Earth Sciences, Faculty

Yanagisawaof Science, University of the Ryukyus

籾田浩義

大阪大学産業科学研究所

第一原理計算による有限温度下での有機半導体の柳澤

将

琉球大学理学部物質地球科学科物理系

第一原理計算による磁性元素を含む表面・界面の

立津

慶幸

名桜大学

理論解析
56 2021-Ca-0064

Faculty of Mathematics and Physics, Institute of

ワイドギャップ酸化物材料における点欠陥の構造

First-principles band structure calculation of organic crystals at finite-temperature

バンド計算
55 2021-Ca-0012

Tatsuki Oda

spintronics and magnetic materials

安定性と電子状態
54 2021-Cb-0028

Analyses on electronic structure and magnetoelectric effect in high-performance

および電気磁気効果解析

進化論的アルゴリズムによる高速化学反応過程シ

Science and Engineering, Kanazawa University

Theoretical analyses for surfaces and grain boundaries with magnetic elements

Yasutomi

from first-principles calculations

Tatetsu
Koichi Kusakabe Graduate School of Science, University of Hyogo

草部浩一

兵庫県立大学大学院理学研究科

Evolutionary algorithm for simulation of fast chemical reaction process

梅本

幸一郎

東京工業大学地球生命研究所

Order-disorder transitions in post-post-perovskite phases in Mg-Si-O system

Meio University

ミュレーション手法の開発
57 2021-Ca-0094

Mg-Si-O系ポストポストペロブスカイト相における秩序無秩序転移145

Koichiro

Earth-Life Science Institute, Tokyo Institute of

UmemotoTechnology

Center for Advanced Research of Energy and
58 2021-Ca-0020

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

附属エネル

ギー・マテリアル融合領域研究センター

Reduction of Rare Metals in Fuel Cell Catalysts and Hydrogen Permeable

Norihito

Membrane

Sakaguchi

Materials, Faculty of Engineering, Hokkaido
University

59 2021-Ca-0056

高機能スピントロニクス磁性材料の電子構造解析

小田竜樹

Analyses on electronic structure and magnetoelectric effect in high-performance

金沢大学理工研究域数物科学系

および電気磁気効果解析
60 2021-Ca-0096

第一原理計算によるセロビオースの加水分解反応

Tatsuki Oda

spintronics and magnetic materials
佐々木

岳彦

東京大学

大学院新領域創成科学研究科

Study on Hydration Process of Cellobiose by First Principles Calculations

Science and Engineering, Kanazawa University
Takehiko Sasaki

過程の研究
61 2021-Cb-0008

固体中ミュオンの第一原理計算

Faculty of Mathematics and Physics, Institute of

Graduate School of Frontier Sciences, The Universityof Tokyo

斎藤峯雄

金沢大学理工研究域数物科学系

First-principles calculations on muon in solids

Mineo Saito

Division of Mathematical and Physical Sciences
Kanazawa University

62 2021-Ca-0008

純水による Si 単結晶の触媒表面基準エッチングの

BUI VANPHOStudy on removal mechanism of single crystalline Si planarized by catalyst referred

大阪大学大学院工学研究科

メカニズム解明63 2021-Ca-0047

ペロブスカイト型酸化物の光励起状態におけるイ

大村

訓史

広島工業大学

Ab initio molecular dynamics study on ion-conduction mechanisms of perovskite-

工学部

オン伝導に関する第一原理分子動力学研究
64 2021-Ca-0113

第一原理計算による金属酸化物中の水素同位体ミVanpho Bui

Graduate School of Engineering, Osaka University

etching in pure water
Satoshi Ohmura

type oxide
毛偉Faculty of Engineering, Hiroshima Institute ofTechnology

東京大学工学部研究科

First-principles calculation of microscopic behaviors of hydrogen in metal oxides

Wei Mao

School of Engineering, The University of Tokyo
Riken

クロ挙動に関する研究
65 2021-Ca-0071
66 2021-D-0006

玄武岩メルトとガラスの構造と物性第一原理計算による銀(111)表面上ヘリセン吸着構

飯高敏晃

理化学研究所

Structure and Property of Basalt Melt and Glass

Toshiaki Iitaka

濱本雄治

大阪大学 大学院工学研究科 物理学系専攻

First principles study of the adsorption structure of helicene on the Ag(111) surface

Yuji Hamamoto

造の数値的研究67 2021-Ca-0011

68 2021-Ca-0107

有機無機材料界面における二次元秩序構造形成過University
折本裕一

九州大学大学院総合理工学研究院物質科学部門

organic/inorganic materials interface

RSDFT計算による非接触原子間力顕微鏡のエネル

RSDFT calculation of atomic displacement captured by energy dissipation channel

新井

豊子

金沢大学

第一原理計算による有機強誘電体・圧電体の物性

Sb系テラヘルツトランジスタのための歪バンド構

Yuuichi Orimoto

Department of Material Sciences, Faculty ofEngineering Sciences, Kyushu University

Toyoko Arai

Kanazawa Universityof noncontact atomic force microscope
石橋

章司

Prediction of properties of organic ferroelectrics and piezoelectrics by first-

産業技術総合研究所

予測70 2021-Cb-0018

First principles calculations of two-dimensional ordering process at

程の第一原理計算

ギー散逸チャンネルで捉えた原子変位機構の解明
69 2021-Ca-0060

Department of Precision Engineering, Osaka

Shoji Ishibashi

principles calculation

National Institute of Advanced Industrial Scienceand Technology

藤代博記

東京理科大学

Strained Band-Structure Engineering for Antimonide-Based Terahertz Transistors

Hiroki Fujishiro

Tokyo University of Science石井史之

金沢大学ナノマテリアル研究所

First-principles study of interface structure prediction and electronic structures

Fumiyuki Ishii

Kanazawa University

造設計
71 2021-Cb-0053
72 2021-Cb-0034

界面構造予測と電子状態に関する第一原理的研究
基于第一原理的铁磁体声子-磁子耦合研究邵成First principles based investigation of phonon-magnon coupling in ferromagnetic

東京大学機械工学塩見研究室

Cheng Shao

insulator
73 2021-Cb-0035

van der Waals 相互作用が生み出す低熱伝導大西正人

東京大学機械工学専攻

Low Thermal Conductance Generated by van Der Waals Interaction

Shiomi Lab, Mechanical engineering, The Universityof Tokyo

Masato Ohnishi

Department of Mechanical Engineering, The
University of Tokyo

74 2021-Ca-0116

ガウス過程回帰による二次元物質構造の大域的探濱本雄治

大阪大学 大学院工学研究科 物理学系専攻

索

Global search for the structures of two-dimensional materials by Gaussian process

Yuji Hamamoto

regression

Department of Precision Engineering, Osaka
University
Center for Advanced Research of Energy and

75 2021-Cb-0023

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

附属エネル

ギー・マテリアル融合領域研究センター

76 2021-Ca-0090

マグネシウム合金系の相安定性と物性制御因子の

圓谷

貴夫

熊本大学

大学院先導機構

解明：第一原理計算による研究
77 2021-Ca-0026

第一原理分子動力学法に基づくガラスの静的構造
高良明英

熊本大学技術部

Reduction of Rare Metals in Formic Acid Decomposition Catalysts and Oxygen

Yuji Kunisada

Storage Materials

Materials, Faculty of Engineering, Hokkaido
University

Origins of phase stabilities and physical properties in Mg based alloys: A first-

Takao

Priority Organization for Innovation and Excellence,principles study

Tsumuraya

Kumamoto University

Ab initio molecular dynamics study on static structure of glass materials

Akihide Koura

Technical Division, Kumamoto University

に関する研究146

78 2021-Ca-0082

第一原理計算による光触媒反応メカニズムの解明

城塚

達也

茨城大学

Elucidation of Photocatalytic Reaction Mechanism by Ab Initio Calculations

Tatsuya

Ibaraki University

Joutsuka
79 2021-Ca-0114

第一原理計算による粒界安定構造探索幾原雄一

東京大学大学院工学系研究科総合研究機構

Determining grain-boundary stable atomic structure by first-principle calculations

Yuichi Ikuhara

Institute of Engineering Innovation, University ofTokyo

80 2021-Cb-0029

準フォノニック結晶によるナノ熱輸送の究極抑制

LIAO

YUXUAN 東京大学耭械工学専攻

Ultimate Suppression of Nanoheat Transport with Quasi-phononic Crystal

Yuxuan Liao

Department of Mechanical Engineering, theUniversity of Tokyo

SrVO3/SrTiO3 および CaCuO2/SrTiO3 多層膜およ81 2021-Cb-0033

びCa5Ir3O12に対する反射スペクトルの第一原理

中村

和磨

九州工業大学

Ab initio calculation for reflectivity for SrVO3/SrTiO3, CaCuO2/SrTiO3, andKazumaCa5Ir3O12

Nakamura

Kyushu Institute of Technology

計算
82 2021-Ca-0030

83 2021-Ca-0041

半導体表面界面における構造的素励起の研究

固体光吸収の原子論的シミュレーション

影島

篠原

博之

康

島根大学大学院自然科学研究科

Study on structural elementary excitations at semiconductor surfaces and interfaces

東京大学工学系研究科附属光量子科学研究セン

Atomistic simulations for optical absorption of solids

ター
84 2021-Ca-0092

SrVO3/SrTiO3 および CaCuO2/SrTiO3 多層膜に対中村

和磨

九州工業大学する第一原理有効模型導出85 2021-Ca-0046

分子修飾ナノ界面設計のための第一原理および人

鶴田

健二

岡山大学学術研究院自然科学学域

工ニューラルネット分子動力学計算
86 2021-D-0003

イリジウム酸化物Ca$̲{5}$Ir$̲{3}$O$̲{12}$の光

Hiroyuki

Graduate School of Natural Science and Technology,

Kageshima

Shimane University

YasushiPhoton Science Center, School of Engineering, theShinohara

University of Tokyo

Ab initio derivation of effective low-energy models for SrVO3/SrTiO3 andKazumaCaCuO2/SrTiO3 multilayer system

Nakamura

Ab-initio and artificial neural-network molecular-dynamics calculations for molecule-Kenji Tsuruta

modified nanointerfaces

Kyushu Institute of Technology
Graduate School of Natural Science and Technology,
Okayama University

河野翔也

九州工業大学

Optical conductivity of Ca$̲{5}$Ir$̲{3}$O$̲{12}$ by first-principles calculations

Shoya Kawano

Kyushu Institute of Technology

小野

頌太

岐阜大学

Stability of atomically thin alloys

Shota Ono

Gifu University

藤代博記

東京理科大学

Strained Band-Structure Engineering for Antimonide-Based Terahertz Transistors

Hiroki Fujishiro

Tokyo University of Science野澤和生

鹿児島大学理学部物理科学科

First-principles calculations of complex metallic alloy surfaces

Kazuki Nozawa

学伝導度の第一原理計算
87 2021-Ca-0006
88 2021-Ca-0065

原子層合金の安定性
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

89 2021-Ca-0088

複雑な構造を持つ合金表面の第一原理計算

Department of Physics and Astronomy, Kagoshima
University

90 2021-Cb-0004

金属表面での置換反応の分子動力学シュミレー

福田常男

大阪公立大学大学院工学研究科電子物理系専攻 Molecular dynamics simulation of substitution reaction on metal surface

Tuneo Fukuda

ション
91 2021-Ba-0041

永久磁石材料の有限温度磁性

Depart. of Physics and Electronics, Graduate Schoolof Eng., Osaka Metroolitan University

赤井久純

東京大学物性研究所

Finite temperature magnetic properties of permanent magnet materials

Hisazumi Akai

Institute for Solid State Physics, The University ofTokyo

92 2021-Ba-0020

超伝導密度汎関数理論に基づく第一原理Tc計算手

明石遼介

量子科学技術研究開発機構

法の高度化
93 2021-Bb-0036

永久磁石材料の結晶磁気異方性の第一原理計算

Development of the first-principles method for calculating Tc based on density

Ryosuke Akashi

functional theory for superconductors
赤井久純

東京大学物性研究所

First-principles calculation of magnetocrystalline anisotropy of permanent magnet

Technology
Hisazumi Akai

materials
94 2021-Ba-0026

対称性指標を用いた網羅的なトポロジカル物質探渡邉悠樹

東京大学工学系研究科物理工学専攻

Comprehensive material search based on symmetry indicators

索95 2021-Ca-0044

積層グラフェンの物性解明

藤本義隆

九州大学工学研究院

Physical properties of layered graphene

National Institutes for Quantum Science andInstitute for Solid State Physics, The University ofTokyo

Haruki

Department of Applied Physics, The University of

WatanabeTokyo

Yoshitaka

Faculty of Engineering, Kyushu University

Fujimoto
96 2021-Cb-0039

不純物半導体の金属絶縁体転移の臨界濃度とクー

原嶋庸介

奈良先端科学技術大学院大学

ロンギャップ97 2021-Cb-0051

第一原理によるペロブスカイト型酸化物粒界の安
定構造探索

幾原

雄一

東京大学大学院工学系研究科総合研究機構

Critical concentration of metal-insulator transition in doped semiconductors andYosukeCoulomb gap

Harashima

First principles calculations for proving stable grain-boundary structures inperovskite oxides

147

Yuichi Ikuhara

Nara Institute of Science and Technology
Institute of Engineering Innovation, University ofTokyo

98 2021-Ba-0022

触媒インフォマティクスに向けた新奇表面サイト

日沼

洋陽

産業技術総合研究所

Exploration of exotic surface sites for catalyst informatics

Yoyo Hinuma

探索
99 2021-Bb-0017

100 2021-Bb-0020

101 2021-Bb-0041

一様電場下における磁性絶縁体の第一原理計算

機械学習による振動スペクトルの予測方法の検証
銀・銅カルコゲナイド熱電材料の計算機マテリア

and Technology
山口

直也

平塚

将起

佐藤

和則

金沢大学ナノマテリアル研究所

工学院大学機械工学科

大阪大学大学院工学研究科

ルデザイン
102 2021-Ba-0024

第一原理計算と機械学習に基づく非平衡現象の大104 2021-Bb-0012

105 2021-Ba-0011

106 2021-Ba-0054

原子層合金の安定性: II
硫化ホウ素薄膜の電子状態における膜厚依存性
ネオジム永久磁石副相および界面の構造と交換結

三澤賢明

岡山大学大学院自然科学研究科

108 2021-Ba-0017

Validation of a Machine Learning Method for Predicting Vibration Spectra
Computational materials design of Ag, Cu chalcogenide based thermoelectric

Large-Scale Molecular Dynamics Simulations on Non-Equilibrium Phenomena Using

小野

頌太

豊田

雅之

寺澤

麻子

岐阜大学
東京工業大学

Stability of atomically thin alloys: II
理学院物理学系

高度情報科学技術研究機構

Thickness-dependent electronic structure of exfoliated boron monosulfide
First-principles analysis of structure and exchange coupling constants of subphases

Department of Mechanical Engineering, Kogakuin

Hiratsuka

University

Kazunori Sato

Graduate School of Engineering, Osaka University

Masaaki Misawa

Okayama University
Shota Ono

Gifu University

Masayuki

Department of Physics, School of Science, Tokyo

ToyodaInstitute of Technology

Asako Terasawa

Calculation of Infrared and Raman spectra by molecular dynamics simulation using

Masaki

Department of Mechanical Engineering, Kogakuin

machine learning

Hiratsuka

University

Katsuyoshi

Department of Physics, Faculty of Science,

理論的研究

Kobayashi

Ochanomizu University

MLOを用いた第一原理有効模型の自動生成システ

Hirofumi

平塚

将起

工学院大学機械工学科

新たなナノスケール表面界面の電子物性に関する

小林

功佳

榊原

寛史

お茶の水女子大学理学部物理学科

鳥取大学大学院工学研究科

Theoretical study on electronic properties of new nanoscale surfaces and interfaces

Automatic generation of first-principle effective models based on MLO

有機分子を活用したスピン流-電流変換物質の第一

Pb系トポロジカル絶縁体の欠陥形成エネルギーおTechnology

大きな分子量を持つ有機半導体結晶の電子状態の113 2021-Ba-0057

量子液晶の電子状態計算
液晶におけるオーダーパラメータと電子輸送機構

山口直也

金沢大学ナノマテリアル研究所

徳本有紀

東京大学生産技術研究所

First-principles Calculations of Spin-to-charge Conversion Materials Utilizing

Naoya

Nanomaterials Research Institute, Kanazawa

Organic Molecules

Yamaguchi

University

Defect formation energy and band structure of Pb-based topological insulators

Yuki Tokumoto

115 2021-Ba-0059

網羅的DFT計算によるAB型2次元物質探索
ダイヤモンド表面のグラファイト化とその剥離プ

島田

敏宏

北海道大学

大学院工学研究院

Electronic structure calculation of organic crystals with high molecular weight

異方的結晶構造を持つ磁性体と誘電体/磁性体界面

池田

浩章

大野

玲

立命館大学理工学部物理科学科
東京工業大学117 2021-Bb-0016

Faculty of Engineering, Hokkaido University

Electronic structure calculations in quantum liquid crystals
Correlation between Order Parameter and Electron Transport Mechanism in Liquid

Hiroaki Ikeda

Department of Physics, Ritsumeikan University

Akira Ohno

Tokyo Institute of Technology

Masahiro

Institute for Solid State Physics, The University of

FukudaTokyo

Kouji Inagaki

Graduate school of Engineering, Osaka University

Crystal
福田

将大

稲垣

耕司

東京大学物性研究所

大阪大学大学院工学研究科

AB type 2D materials search by high-throughput DFT calculationsFirst-principles calculation of graphitization of diamond surface and its exfoliation
process

小幡正雄

金沢大学理工研究域

系の解析
硫化物系固体電解質を用いた全固体キャパシタのToshihiro
Shimadaロセスの第一原理計算
116 2021-Bb-0032

Institute of Industrial Science, The University of
Tokyo

との相関
114 2021-Ba-0058

Graduate School of Engineering, Tottori University

Sakakibara

計算
112 2021-Ba-0046

Research Organization for Information Science and

機械学習と第一原理MDによる赤外およびラマンス

よびバンド構造
111 2021-Ba-0028

Graduate School of Natural Science and Technology,

and interface in Nd-based permanent magnets

原理計算
110 2021-Ba-0025

University

Masaki

合定数の第一原理計算的解析

ムの研究
109 2021-Ba-0019

Nanomaterials Research Institute, Kanazawa

YamaguchiFirst-Principles Calculation and Machine Leaning

ペクトルの計算方法の検討
107 2021-Ba-0007

First-principles Calculations of Magnetic Insulators Under Uniform Electric Fields

Naoyamaterials

規模分子動力学シミュレーション
103 2021-Bb-0005

National Institute of Advanced Industrial Science

Analysis of insulator-ferromagnetic interface and magnetic material with an

Masao Obataanisotropic crystal structure大久保將史

Institute of Science and Engineering, Kanazawa
University

早稲田大学

Development of all-solid-state capacitors using sulfide-based solid electrolytes

Masashi Okubo Waseda University

東北大学材料科学高等研究所

Interaction between metallic atom and instable CeO2 (100) facet

Akira Yoko

開発
118 2021-Bb-0039

不安定結晶面CeO2(100)と担持金属単原子の相互
横

哲

作用

148

WPI-AIMR, Tohoku University

119 2021-Ba-0033

化学気相成長における金属膜成長メカニズムの理

城塚

達也

茨城大学

Theoretical Analysis of Metal Film Growth Mechanism in Chemical Vapor Deposition

論解析
120 2021-Bb-0021

分子吸着表面における光励起過程における光電子

Tatsuya

Ibaraki University

Joutsuka
二木

かおり

Calculation of photoelectron angle distribution in the photoexcitation process on

千葉大学

角度分布に関する計算

Kaori Niki

Chiba University

Yuji Ohkubo

Graduate School of Engineering, Osaka University

Kazuhito

Research Institute for Applied Mechanics, Kyushu

OhsawaUniversity

KazumeFaculty of Science and Engineering, IWATE

Nishidate

University

the organic molecules adsorbed surface
Clarification of atomistic mechanism application of process design for adhesion

121 2021-Bb-0031

第一原理計算を用いた金属とプラズマ処理した

大久保

雄司

大阪大学大学院工学研究科

interface between metal and plasma-treated fluoropolymers using first principles

フッ素樹脂界面の接着メカニズムの解明
calculation
122 2021-Ca-0034

123 2021-Ca-0051

照射損傷と格子間原子との相互作用の研究
第一原理計算によるダブルペロブスカイト型光触

大澤

西館

一人

数芽

九州大学応用力学研究所

Study of interaction between radiation damage and interstitial atom

岩手大学理工学部

First-principles electronic structure calculation of double-perovskite photocatalyst

媒の研究
124 2021-Ca-0062

不純物半導体の金属絶縁体転移の臨界指数とスピ

原嶋庸介

奈良先端科学技術大学院大学

ン秩序
125 2021-Cb-0054

126 2021-Ba-0055

ナノ構造の量子伝導の第一原理計算
金属２原子膜と磁性金属フタロシアニン分子の相

小林

有賀

伸彦

哲也

筑波大学 数理物質系

物理工学域

強誘電体/強磁性体界面系と異方的結晶構造を持つ

シリサイド薄膜系の原子構造と電子状態

ordering

Harashima

Interaction between magnetic metal phthalocyanine molecules and bi-layer metal

京都大学理学研究科化学専攻

NobuhikoDepartment of Applied Physics, University of

Kobayashi

Tsukuba

Aruga Tetsuya

Dept. Chem., School of Science, Kyoto University

小幡正雄

Analysis of ferroelectric-ferromagnetic interface and magnetic material with an

金沢大学理工研究域

Masao Obataanisotropic crystal structure服部

奈良先端科学技術大学院大学物質創成科学研究

賢

Atomic structure and electronic states for silicide films

129 2021-Bb-0022

有馬健太

Ken Hattori

d電子系化合物の電子構造とフェルミオロジー

Graduate School of Materials Science, Nara Instituteof Science and Technology

大阪大学 大学院 工学研究科

媒としての反応性調査
130 2021-Bb-0040

Institute of Science and Engineering, Kanazawa
University

科
グラフェンナノリボンの電子状態計算と加工用触Nara Institute of Science and Technology

films

磁性体の解析
128 2021-Ba-0029

YosukeFirst-principles study of quantum transport in nanostructures

互作用
127 2021-Ba-0056

Critical exponent of metal-insulator transition in doped semiconductors and spinFirst-principles simulation of graphene nanoribbon and investigation of reactivity

Kenta Arima

Graduate School of Engineering, Osaka University

as machining catalyst
眞榮平

孝裕

琉球大学

理学部

Electronic Structure and Fermiology of d-electron compounds

Takahiro

Faculty of Science, University of the Ryukyus

Maehira131 2021-Ba-0030

酸化物における電場印加下での電子格子相互作用

牧野哲征

福井大学遠赤外領域開発研究センター

Electron-phonon interaction under electric fields in oxides

Takayuki Makino

Research Center for Development of Far-Infrared
Region, University of Fukui

132 2021-Ba-0053

第一原理計算に基づくマグネシウム合金の欠陥場

松中大介

信州大学工学部機械システム工学科

First-principles Study of Defects of Magnesium Alloysの解析
133 2021-Bb-0006

触媒インフォマティクスに向けた新奇表面サイト

Matsunaka

Department of Mechanical Systems Engineering,

Daisuke

Shinshu University

134 2021-Ca-0010
135 2021-A-0004

分子結晶表面状態の時間分解解析手法の確立
硫化物系固体電解質を用いた全固体キャパシタのNational Institute of Advanced Industrial Science

日沼

洋陽

産業技術総合研究所

Exploration of exotic surface sites for catalyst informatics

Yoyo Hinuma

二木

かおり

千葉大学

Development of time-resolved analysis method for molecular crystal surface

Kaori Niki

早稲田大学

Development of all-solid-state capacitors using sulfide-based solid electrolytes

Masashi Okubo Waseda University

First-principles study of thermoelectric and magnetic properties in doped

Kazutaka

Graduate School of System Informatics, Kobe

Fe$̲{2}$Val

Nishiguchi

University

探索and Technology

大久保

將史

Chiba University

開発
136 2021-A-0005

ドープされたFe$̲{2}$VAlにおける熱電性と磁性の西口

和孝

神戸大学大学院システム情報学研究科

第一原理的研究137 2021-A-0007

トポロジカル絶縁体系のバンド計算秋山

了太

東京大学理学系研究科物理学専攻

Band calculation of topological insulator systems

Ryota Akiyama

Department of Physics, The University of Tokyo

138 2021-A-0010

第一原理計算による光熱変換原理の解明

江目

宏樹

山形大学

Study of the principle of photothermal conversion by ab initio calculations

Hiroki Gonome

Yamagata University

139 2021-A-0011

種々の磁性材料における物理特性の第一原理計算

小田洋平

福島工業高等専門学校

First-principles calculation of physical properties in various magnetic materials

Yohei Kota

National Institute of Technology, Fukushima College149

140 2021-A-0013

ハイエントロピー合金の相安定性

御手洗

容子

東京大学新領域創成科学研究科

Phase stability of high-entropy alloys

Yoko Mitarai

Adsorption states of an organic halogen molecule on semiconductor and metal

Noriyuki

surfaces

Tsukahara

Electronic state calculation of inorganic solid materials using Quantum Espresso

Yoshikazu Suzuki

Graduate School of Frontier Sciences, The Universityof Tokyo141 2021-A-0015

半導体および金属基板へ吸着した有機ハロゲン分

塚原規志

群馬工業高等専門学校

子の吸着状態
142 2021-A-0016

Quantum Espressoを用いた無機固体材料の電子状

鈴木義和

筑波大学数理物質系

態計算
143 2021-A-0017

タングステンブロンズの熱伝導度計算

National Institute for Technology, Gunma College
Faculty of Pure and Applied Sciences, University ofTsukuba内田建東京大学 大学院工学系研究科 マテリアル工学

Calculation of thermal conductivity of Hexagonal Tungsten Bronze

Ken Uchida

Materials Engineering, The University of Tokyo

専攻
144 2021-A-0021

ワイドギャップ半導体電子光素子のフォノン制御

石谷善博

Phonon-property analysis for phonon control in electronic/photonic devices by

千葉大学のためのフォノン物性計算

Ishitani Yoshihiro Chiba University

wide-bandgap semiconductors

2. 強相関 / Strongly Correlated Quantum Systems
No.

課題番号
1 2021-Eb-0006

課題名
テンソルネットワーク繰り込み群による臨界現象

氏名
川島

所属
直輝

Title

東京大学物性研究所

Tensor-Network Renormalization-Group Study of Critical Phenomenaの研究
2 2021-Ea-0007

テンソルネットワーク繰り込み群による臨界現象

高温超伝導の設計に資する非局所クーロン相互作

川島直輝

東京大学物性研究所

4 2021-Ea-0008

Organization
Institute for Solid State Physics, University of Tokyo

Tensor-Network Renormalization-Group Studey of Critical Phenomena

Naoki

Institute for Solid State Physics, University of Tokyo

Kawashima
今田正俊

早稲田大学理工学術院

用の効果の解明
量子スピン液体物質におけるモット転移の数値的

Naoki
Kawashimaの研究
3 2021-Eb-0004

Name

Studies on Effects of Non-Local Coulomb Interaction for High Termperature

Masatoshi

Research Institute for Science and Engineering,

Superconductivity

Imada

Waseda University

Youhei Yamaji

National Institute for Materials Science

Masatoshi

Research Institute for Science and Engineering,

Imada

Waseda University

Study on new-type of nickelate superconductors based on multiorbital models

Kazuhiko Kuroki

Osaka University

山地

洋平

物質・材料研究機構

Numerical studies of Mott transitions in quantum spin liquid candidates

今田正俊

早稲田大学理工学術院

Quantum Spin Liquids on Pyrochlore Lattice

研究5 2021-Ea-0001

6 2021-Ca-0079

パイロクロア格子上の量子スピン液体
新規ニッケル系超伝導体の多軌道模型に基づく研

黒木

和彦

大阪大学

究
7 2021-Ca-0050

8 2021-Cb-0014

9 2021-Ca-0025

電荷・スピン・軌道結合系に現れる対称性の破れ

Theoretical study of symmetry breaking and quantum transport phenomena in

Yukitoshi

Department of Applied Physics, The University ofと量子輸送現象の理論的研究

charge-spin-orbital coupled systems

MotomeTokyo

電荷‧スピン‧軌道結合系に現れる対称性の破れとTheoretical study of symmetry breaking and quantum transport phenomena in

Yukitoshi

Department of Applied Physics, The University of

量子輸送現象の理論的研究

charge-spin-orbital coupled systems

MotomeTokyo

ボルツマンマシンを用いた量子多体系の有限温度

Finite-temperature calculations for quantum many-body systems using Boltzmann

Yusuke Nomura

Keio University

求

求

幸年

野村

幸年

悠祐

東京大学大学院工学系研究科

東京大学大学院工学系研究科

慶應義塾大学計算
10 2021-Ca-0083

強相関系のトポロジカル相・輸送現象と例外点効

machine川上則雄

果11 2021-Ca-0103

強相関効果と非エルミート・トポロジーが織りな

京都大学大学院理学研究科物理学宇宙物理学専 Topological phases, transport phenomena and effects of exceptional points in
攻

吉田

恒也

筑波大学

諏訪

秀麿

堀田

貴嗣

Norio Kawakami Department of Physics, Kyoto University

strongly correlated systems
数理物質系

Exotic phenomena induced by strong correlations and non-Hermitian topology

Tsuneya Yoshida Department of Physics, University of Tsukuba

東京大学大学院理学系研究科物理学専攻

Charge-spin-orbital entanglement of iridates

Hidemaro Suwa Department of Physics, The University of Tokyo

東京都立大学理学研究科物理学専攻

Research of multi-channel Kondo effect emerging from heavy rare-earth ionsTakashi Hotta

す異常物性12 2021-Ca-0117

イリジウム酸化物における電荷スピン軌道エンタ
ングルメント

13 2021-Ca-0055

重希土類イオンに創出するマルチチャンネル近藤
効果の研究

Department of Physics, Graduate School of Science,
Tokyo Metropolitan University150

14 2021-Ca-0054

キタエフ関連模型におけるトポロジカル熱伝導の

那須

譲治

東北大学

Numerical study of topological thermal transport in Kitaev-related systems

Joji Nasu

岡田健

大阪大学量子情報・量子生命研究センター

Variational Monte Carlo study of twisted bilayer graphene

Ken Okada

Tohoku University

数値解析
15 2021-Ca-0009

変分モンテカルロ法によるツイスト二層グラフェ
ンの研究

16 2021-Ca-0042

遍歴磁性体におけるメロン結晶の探索

Center for Quantum Information and Quantum
Biology, Osaka University

速水賢

東京大学大学院工学系研究科

Searching for meron crystal in itinerant magnets

Satoru Hayami

Department of Applied Physics, The University ofTokyo

17 2021-Ca-0032

キャリアドープされた二次元モット絶縁体の光学遠山貴己

東京理科大学理学部応用物理学科

Analysis of string excitations in the optical conductivity of doped Mott insulators

伝導度に現れるストリング励起の解析
18 2021-Cb-0032

強相関系の励起モードと輸送現象

川上則雄

京都大学大学院理学研究科物理学宇宙物理学専

Takami

Department of Applied Physics, Tokyo University of

TohyamaScience

Excitation modes and transport phenomena in strongly correlated systems

Norio Kawakami Department of Physics, Kyoto University

Estimation of Coulomb repulsion in charge transfer salts of EDXT oligomers

Tomoko Fujino

攻
19 2021-D-0004

EDXTオリゴマー電荷移動塩のクーロン反発の計算 藤野智子

東京大学物性研究所

Institute for Solid State Physics, The University ofTokyo

20 2021-Ca-0022

強相関電子系での超伝導状態 、および磁性状態の山田

篤志

千葉大学理学研究科

ハバードモデルによる研究。
21 2021-Ba-0005

Kitaevスピン液体のトポロジカル・ネマティック

Studies of the superconductivity and magnetic states in the strongly correlated

Atsushi Yamada Department of Physics, Chiba University

electron systems based on Hubbard models.
藤本

聡

大阪大学基礎工学研究科

Topological nematic phase transition in Kitaev spin liquid

Satoshi Fujimoto

相転移
22 2021-Bb-0004

23 2021-Ba-0051

24 2021-Ba-0015

散逸のある周期駆動系における非平衡相の数値的

Osaka University
池田

達彦

東京大学物性研究所

Numerical study of nonequilibrium phases in periodically driven systems with研究

dissipation

強相関電子系における励起状態のためのニューラ

Neural network quantum states for excited states in strongly correlated electron

井戸

康太

東京大学物性研究所

Tatsuhiko Ikeda

Kota Ido

systems

数値シミュレーションによる金属磁性体中のスキ

Numerical studies on the photoinduced phenomena of magnetic skyrmion lattices in Masahito

望月維人

早稲田大学先進理工学部応用物理学科

有機導体の強相関ディラック電子系における秩序

小林

晃人

名古屋大学

渡部

洋

立命館大学

大学院理学研究科

Institute for Solid State Physics, The University ofTokyo

ルネットワーク量子状態

ルミオン格子が示す光誘起現象の研究
25 2021-Ba-0018

Department of Materials Engineering Science,

Institute for Solid State Physics, The University ofTokyo
Waseda university

metallic magnets

Mochizuki

Ordered states in strongly correlated Dirac electron systems of organic conductors

Akito Kobayashi Graduate School of Science, Nagoya University

状態の解明
26 2021-Ba-0043

4バンドd-p模型を用いた銅酸化物高温超伝導体のStudy of cuprate high-temperature superconductors using 4-band d-p model解析
27 2021-Bb-0010

強相関多体電子系における新規量子現象の研究

HiroshiRitsumeikan University

Watanabe柳沢孝

産業技術総合研究所

New quantum phenomena in strongly correlated many-body electron systems

TakashiNational Institute of Advanced Industrial Science

Yanagisawa

and Technology

28 2021-Bb-0037

Coナノ薄膜の厚み方向磁化分布計算

首藤健一

横浜国立大学・工学部

Vertical Magnetic distribution of nano-scale Co film

Ken-Ichi Shudo

Yokohama National University

29 2021-Ba-0035

相関電子系における光誘起非平衡ダイナミクス

小野淳

東北大学大学院理学研究科

Photoinduced nonequilibrium dynamics in correlated electron systems

Atsushi Ono

Department of Physics, Tohoku University

所属

Title

Name

Organization

東北大学金属材料研究所

Effects of cavitation on soundwaves

Yuta Asano

Institute for Materials Research, Tohoku University

3. 巨視系の協同現象 / Cooperative Phenomena in Complex, Macroscopic Systems
No.

課題番号
1 2021-Eb-0002
2 2021-Ea-0002

課題名

氏名

音波に対するキャビテーションの影響

浅野

全原子・粗視化力場によるソフトマターの分子シ

篠田

優太
渉

岡山大学異分野基礎科学研究所

ミュレーション
3 2021-Ea-0003

分子動力学シミュレーションによる複雑流体の解

Molecular Simulation of Soft Materials using All-Atom and Coarse-Grained Force

Wataru Shinoda

Field
浅野

優太

東北大学金属材料研究所

Molecular Dynamics Simulation of Complex Fluids

望月維人

早稲田大学先進理工学部応用物理学科

Theoretical study on the spin-wave excitations of multiple-Q magnetic hedgehogs

Okayama University, Research Institute forInterdisciplinary Science

Yuta Asano

Institute for Materials Research, Tohoku University析
多重Qヘッジホッグ型磁気構造のスピン波励起お4 2021-D-0002

Masahito

よび関連現象の理論的解明

Waseda university
Mochizuki151

5 2021-Ca-0089

キタエフスピン液体の有限温度物性の解明

大久保毅

東京大学大学院理学系研究科知の物理学研究セ

Finite temperature property of the Kitaev spin liquid

Tsuyoshi Okubo

ンター
6 2021-Ca-0078
7 2021-Ca-0081

生体膜の構造形成
量子多体系におけるトポロジカルな秩序と量子操

Institute for Physics of Intelligence, The University of
Tokyo

野口

博司

東京大学物性研究所

structure formation of biomembrane

Hiroshi Noguchi

Institute for Solid State Physics, University of Tokyo藤堂眞治

東京大学大学院理学系研究科物理学専攻

Topological order and quantum operation in quantum many-body systems

Synge Todo

Department of Physics, University of Tokyo

北尾彰朗

東京工業大学生命理工学院

作
8 2021-Ca-0016

蛋白質物性に強く関与するソフトモードの効率的

Efficient sampling simulation of the soft modes significantly contribute to protein

サンプリングシミュレー ション
9 2021-Ca-0005

アンダーソン転移の新奇な普遍クラスの臨界現象

Akio Kitao

properties
大槻東巳

上智大学理工学部

Institute of Molecular and Cellular Biosciences,
University of Tokyo
Faculty of Science and Technology, Sophia

Critical phenomena in novel Anderson transitions

Tomi Ohtsuki

Molecular dynamics simulations for assembly and disassembly of protein

Hisashi

Exploratory Research Center on Life and Living

aggregates

Okumura

Systems, Institute for Molecular Science

University
10 2021-Ca-0115

分子動力学シミュレーションによるタンパク質凝奥村久士

自然科学研究機構生命創成探究センター

集体の離合集散の研究
11 2021-Ca-0014

量子スピン液体に対するスピン非対角相互作用と加藤雄介

双極子相互作用の効果
12 2021-Cb-0036

マルチスケールシミュレーションを用いた熱機能

東京大学総合文化研究科広域科学専攻相関基礎 Effects of non-diagonal spin interactions and dipole interaction on quantum spin
科学系

liquids

Yusuke Kato

Department of Basic Science, The University of
Tokyo

塩見

淳一郎

東京大学工学系研究科

Analysis for Thermal Functional Materials using Multi-scale Simulation

Junichiro Shiomi School of Engineering, The University of Tokyo

野口博司

東京大学物性研究所

structure formation of biomembrane

Hiroshi Noguchi

材料の性能解析13 2021-Cb-0013
14 2021-Ca-0033

生体膜の構造形成
吸水した結晶性高分子の構造と機械的特性

樋口祐次

Structure and mechanical properties of crystalline polymers absorbing water

九州大学情報基盤研究開発センター

Yuji Higuchi

molecules
15 2021-Ca-0038

HPCを基盤とした実験解析・シミュレーション・

星

鳥取大学大学院工学研究科機械宇宙工学専攻応健夫

データ駆動科学の融合
16 2021-Ca-0035
17 2021-Ca-0106

キタエフ量子スピン液体におけるスピン輸送特性
マルチスケールシミュレーションを用いた熱機能

Institute for Solid State Physics, University of Tokyo
Research Institute for Information Technology,
Kyushu University

HPC-based fusion of experiment analysis, simulation and data-driven science

Takeo Hoshi

用数理工学講座

Department of Applied Mathematics and Physics,
Tottori University

古賀昌久

東京工業大学

Spin transport through Kitaev spin liquids

Akihisa Koga

Tokyo Institute of Technology

塩見

淳一郎

東京大学工学系研究科

Analysis for Thermal Functional Materials using Multi-scale Simulation

Junichiro Shiomi School of Engineering, The University of Tokyo渡辺

宙志

慶応義塾大学理工学部

Analysis of the phase boundary under the steady-state heat conduction

材料の性能解析18 2021-Cb-0025

定常熱伝導下における相界面の解析解析

HiroshiFaculty of Science and Technology, Keio University

Watanabe
19 2021-Cb-0049

拡張キタエフ模型の有限温度物性の解明

大久保毅

東京大学大学院理学系研究科知の物理学研究セ

Finite temperature property of the Kitaev models

Tsuyoshi Okubo

ンター

Institute for Physics of Intelligence, The University ofTokyo

マルチスケール流動シミュレーション用プラット
20 2021-Ca-0102

フォーム(MSSP)を用いた流体―粘弾性体膜の連成 川勝

年洋

東北大学大学院理学研究科物理学専攻

シミュレーション
21 2021-Ca-0053

大域熱力学的釣り合いによりもたらされる非平衡中川尚子

茨城大学理学部

Hybrid simulations on fluid-viscoelastic membrane system using multiscale

Toshihiro

Department of Physics, Faculty of Science, Tohoku

simulation platform on complex fluids (MSSP)

Kawakatsu

University

Steady states realized by a global thermodynamic balance in nonequilibrium

特有の現象
22 2021-Cb-0037

厳密対角化法を用いた量子格子模型シミュレー

Naoko

井戸

康太

東京大学物性研究所

Development of COMPutation ARchive of Exact Diagonalization(COMPARED)

Kota Ido

ションデータベースCOMPAREDの構築
23 2021-Ca-0043

スピン・フラストレーション系の量子相転移の数

ウイルス感染を阻害する新規人工タンパク質の理坂井徹

兵庫県立大学大学院理学研究科

Toru Sakai

25 2021-Cb-0027
果Graduate School of Science, University of Hyogo

Systems
新井

宗仁

東京大学大学院総合文化研究科

Theoretical Design of Novel Artificial Proteins to Inhibit Viral Infection

Munehito Arai

論的設計
量子多体系におけるスクランブリングと散逸の効

Institute for Solid State Physics, The University ofTokyo

Numerical Diagonalization Study on Quantum Phase Transitions of Frustrated Spin

値対角化による研究
24 2021-Ca-0093

Department of Physics, Ibaraki University

Nakagawa

Graduate School of Arts and Sciences, The
University of Tokyo

手塚真樹

京都大学大学院理学研究科物理学・宇宙物理学
Scrambling and effect of dissipation in quantum many-body systems
専攻

152

Masaki Tezuka

Department of Physics, Kyoto University全原子分子動力学シミュレーションによる実在系
26 2021-Ca-0095

バイオポリマーの力学的特性及び熱的特性発現の岡崎

東京大学大学院新領域創成科学研究科物質系専 Investigation of the molecular origins of the mechanical and thermal properties of進攻Susumu Okazaki

realistic bio-polymers using all-atomistic molecular dynamics

Department of Advanced Materials Science, The
University of Tokyo

分子機構の解明27 2021-Ca-0007

ロバスト強靭化高分子ゲルにおける伸長誘起結晶

眞弓

皓一

Molecular Dynamics Simulations of Strain-Induced Crystallization in Robust and

東京大学物性研究所

化の分子動力学シミュレーション
28 2021-Ca-0049

29 2021-Ca-0013

無秩序キタエフ模型におけるグラス転移
ホタル生物発光関連分子の吸収・蛍光スペクトル

Koichi Mayumi

Tough Polymer Gels
山田

樋山

昌彦

みやび

大阪大学基礎工学研究科

Glass transition in the disordered Kitaev model
Theoretical analysis of absorption and fluorescence spectra for firefly

群馬大学

解析

Institute for Solid State Physics, The University ofTokyo

MasahikoDepartment of Materials Engineering Science,

YamadaOsaka University

Miyabi Hiyama

Gunma University

bioluminescence related molecules
Keio University, Faculty of Science and Technology,

30 2021-Cb-0005

非平衡条件下にある表面ナノバブルの分子動力学

中野裕義

慶応義塾大学理工学部物理情報工学科

Molecular dynamics study of surface nanobubbles under non-equilibrium conditions

シミュレーション

Hiroyoshi

Department of Applied Physics and Physico-NakanoInformatics

31 2021-Cb-0020

32 2021-Ca-0015

臨界現象のための動的スケーリング解析の開発と尾関之康

Development and improvement of dynamical scaling analysis for critical

電気通信大学情報理工学研究科

phenomena II

トポロジカル相とバルクエッジ対応の科学に関す

Topological phases and science of bulk-edge correspondence by numerical

Yasuhiro

methods

Hatsugai

Magnetism and superconductivity in ternary chromium chalcogenides

Harald Jeschke

初貝安弘

筑波大学大学院数理物質科学研究科物理学専攻

る数値的研究33 2021-Cb-0026

Yukiyasu Ozeki

改良 II

三元系クロムカルコゲナイドの磁性と超伝導

Jeschke

Harald 岡山大学異分野基礎科学研究所

Department of Applied Physics and Chemistry, The
University of Electro-Communications
Institute of Physics, University of Tsukuba
Research Institute for Interdisciplinary Science
Okayama University

34 2021-Ca-0036

BaTiO$̲{3}$ナノ構造の分子動力学シミュレーショ

橋本

保

産業技術総合研究所

Molecular dynamics simulation of BaTiO$̲{3}$ nano structureン
35 2021-Ca-0039

36 2021-Ca-0074

37 2021-Ca-0077

臨界現象のための動的スケーリング解析の開発と尾関之康

Development and improvement of dynamical scaling analysis for critical

電気通信大学情報理工学研究科

改良

phenomena

MP-SRP法を活用した架橋ネットワークのトポロ

DPD simulations of cross-linked networks to study topological effect using MP-SRP

萩田克美

防衛大学校応用科学群応用物理学科

ジー効果のDPDシミュレーション研究

methodポリマー材料の巨大熱物性データベースの機械学

Machine-learning-assisted Development of Giant Thermal-Property Database for

LIAO

YUXUAN 東京大学耭械工学専攻

習支援開発
38 2021-Cb-0024

カイラル磁性体における量子効果

Tamotsu

National Institute of Advanced Industrial Science

Hashimotoand Technology (AIST)

Yukiyasu Ozeki

University of Electro-Communications
Katsumi Hagita

加藤雄介

Quantum effects on chiral magnets

Yuxuan Liao

39 2021-Cb-0042

新井宗仁

Yusuke Kato

41 2021-Cb-0043

フラストレート磁性体における新奇秩序
フラストレートした量子磁性体に対する熱ゆらぎ

東京大学大学院総合文化研究科

Rational design of novel proteins for medical and industrial applications

Munehito Arai

43 2021-Cb-0017

固体間摩擦の3次元有限要素解析
双極子相互作用を持つ三角格子上のボーズハバー

Graduate School of Arts and Sciences, The
University of Tokyo

川村

下川

光

統久朗

神戸大学分子フォトサイエンス研究センター

沖縄科学技術大学院大学

Novel order in frustrated magnets

Thermal effects on quantum frustrated magnetismsの効果
42 2021-Ca-0073

Department of Basic Science, The University of
Tokyo

的設計
40 2021-Ca-0099

Department of Mechanical Engineering, theUniversity of Tokyo

科学系
医療・産業応用を指向した新規タンパク質の合理

Department of Applied Physics, School of Applied
Sciences, National Defense Academy

Polymer Materials
東京大学総合文化研究科広域科学専攻相関基礎

Department of Applied Physics and Chemistry, The

HikaruMolecular Photoscience Research Center, Kobe

Kawamura

University

TokuroOkinawa Institute of Science and Technology

Shimokawa

Graduate University
Graduate school of engineering science大槻道夫

大阪大学基礎工学研究科

Three-Dimensional Finite Element Analysis of Friction between solids

Michio Otsuki

鈴木隆史

兵庫県立大学Supersolid phases in the hard-core bosonic Hubbard model on a triangular lattice

Takafumi Suzuki Graduate School of Engineering, University of Hyogo松本宗久

信越化学工業磁性材料研究所

Data assimilation of measurement and simulation for rare-earth permanent

Munehisa

Institute for Magnetic Materials, Shin-Etsu Chemicalmagnets

MatsumotoEngineering

大学院工学研究科

ド模型における超固体探索44 2021-Ca-0059

希土類永久磁石材料における計測・計算データ同化153

45 2021-Cb-0046

46 2021-Ca-0021

Ground state and dynamical properties of the

ゴウケ$J̲1J̲2K$-Heisenberg model on the square lattice

アス

セラミックス界面におけるナノスケールフォノン

マティ

47 2021-Ca-0110

藤井大阪大学大学院工学研究科マテリアル生産科学

進

水上

渉

49 2021-Cb-0007

SU(N)ハイゼンベルク模型の比熱と磁化率

ポリマー材料開発の次世代統合工学

山田

吉本

勇太

Division of Materials and Manufacturing Science,

Nanoscale phonon transport across ceramics interfaces

Susumu Fujii

Simulations of quantum-classical-hybrid algorithms for sensor materials with

WataruCenter for Quantum Information and Quantum

considering noise

Mizukami

Biology

MasahikoDepartment of MaterialsMaterials Engineering

YamadaScience, Osaka University

Graduate School of Engineering, Osaka University

大阪大学 量子情報・量子生命研究センター

昌彦

Okinawa Institute of Science and Technology
Graduate University

専攻

混合アルゴリズム計算
48 2021-Cb-0002

Matthias Gohlke

square lattice

散乱機構の解明
センサー材料のためのノイズを考慮した量子古典

Ground state and dynamical properties of the $J̲1J̲2K$-Heisenberg model on the

沖縄科学技術大学院大学

大阪大学基礎工学研究科

東京大学 大学院工学系研究科 機械工学専攻

Heat capacity and magnetic susceptibility of the SU(N) Heisenberg models

Next-generation integrated engineering for developing polymer materials

Yuta Yoshimoto

Department of Mechanical Engineering, The
University of Tokyo

50 2021-Ca-0017

ハニカム格子スピン系の数値的研究

安田千寿

Ground state and dynamical properties of the

ゴウケ$J̲1J̲2K$-Heisenberg model on the square latticeアス

琉球大学理学部

Numerical study of spin systems on the honeycomb lattice

Chitoshi Yasuda

Department of Physics and Earth Sciences,
University of the Ryukyus

51 2021-Ca-0105

52 2021-Ca-0076

53 2021-Cb-0019

摩擦の物理
スカーミオン等の磁気構造の安定性とダイナミク

マティ

沖縄科学技術大学院大学

相転移キネティクスとポリアモルフィズム

Matthias Gohlke

松川

square lattice

近藤

宏

憲治

青山学院大学理工学部

北海道大学電子科学研究所

スの数値解析
54 2021-Cb-0016

Ground state and dynamical properties of the $J̲1J̲2K$-Heisenberg model on the

Physics of Friction
Numerical Analysis for Stability and Dynamics of Magnetic Structures such as

Okinawa Institute of Science and Technology
Graduate University

HiroshiFaculty of Science and Engineering, Aoyama Gakuin

Matsukawa

University

Kenji Kondo

Research Institute for Electronic Science

Skyrmions渕崎

員弘

愛媛大学理工学研究科

Kinetics of phase transition and polyamorphism

Kazuhiro

Department of Physics, Ehime University

Fuchizaki
55 2021-Ca-0029

ダイポール相互作用を持つ２次元正方格子上の鈴木隆史

兵庫県立大学

大学院工学研究科

中野博生

兵庫県立大学大学院理学研究科

Supersolid state in a square-lattice Bose-Hubbard model with dipole interactions

Takafumi Suzuki Graduate School of Engineering, University of Hyogo

Numerical study on low-energy states of quantum spin systems

Hiroki Nakano

ボーズハバード模型における超固体状態
56 2021-Ca-0040

量子スピン系の低エネルギー状態に関する数値的

Graduate School of Science, University of Hyogo

研究57 2021-Ca-0004

機械学習を用いた代替燃料の低温酸化反応モデル

李敏赫

東京大学大学院工学系研究科機械工学専攻

構築
58 2021-Ca-0037

分子動力学シミュレーションを用いた脂質ラフト

Development of the Low-Temperature Oxidation Model for Alternative Fuels Using

Minhyeok Lee

Machine Learning伊藤暁

分子科学研究所平山尚美

島根大学次世代たたら協創センター

Formation of lipid rafts studied by molecular dynamics simulation

Department of Mechanical Engineering, The
University of Tokyo

Satoru Itoh

Institute for Molecular Science

形成に関する研究59 2021-Cb-0044

Fe基アモルファス合金の原子間ポテンシャルの作成と結晶化過程の分子動力学シミュレーション

60 2021-Ca-0104

フラストレートした量子磁性体に対する熱ゆらぎ

Development of inter-atomic potentials of Fe-based amorphous alloys and MD

下川

統久朗

沖縄科学技術大学院大学

Thermal effects on quantum frustrated magnetismsの効果
61 2021-Cb-0009

磁気スキルミオン結晶における余剰自由度が生み

望月維人

早稲田大学先進理工学部応用物理学科

出す新規ダイナミクス
62 2021-Cb-0050

センサー材料のためのノイズを考慮した量子古典

水上渉大阪大学 量子情報・量子生命研究センター

混合アルゴリズム 計算
63 2021-Cb-0047

テンソルネットワーク表現を用いたデータ分析手

Naomi Hirayama

simulation of crystallization process

Next Generation Tatara Co-Creation Centre,
Shimane University

TokuroOkinawa Institute of Science and Technology

Shimokawa

Graduate University

Novel dynamics of magnetic skyrmion crystal phases due to extra degrees of

Masahito

freedom

Mochizuki

Simulations of quantum-classical-hybrid algorithms for sensor materials with

WataruCenter for Quantum Information and Quantum

considering noise

Mizukami

Biology

Kenji Harada

Graduate school of Informatics, Kyoto University

原田

健自

京都大学大学院情報学研究科

Data analysis method using a tensor network representation渕崎

員弘

愛媛大学理工学研究科

Kinetics of phase transition and polyamorphism

Waseda university

法
64 2021-Ca-0045

相転移キネティクスとポリアもルフィズム

Kazuhiro
Fuchizaki

154

Department of Physics, Ehime University

65 2021-Cb-0015

66 2021-Ca-0067

フラストレート磁性体における新奇秩序
テンソルネットワーク表現を用いたデータ分析手

川村

原田

光

健自

神戸大学分子フォトサイエンス研究センター

京都大学大学院情報学研究科

Novel order in frustrated magnets

Data analysis method using a tensor network representation

HikaruMolecular Photoscience Research Center, Kobe

Kawamura

University

Kenji Harada

Graduate school of Informatics, Kyoto University

法
Environmental Management Research Institute,
67 2021-Ca-0031

大規模メタダイナミクスシミュレーションによる灘

浩樹

産業技術総合研究所環境創生研究部門

Elucidation of pathways for the crystallization of ionic liquids by large-scale

イオン液体の結晶化経路解明

metadynamics simulation

量子モンテカルロ法を用いたスピンホール磁気抵

Theoretical study of spin Hall magnetoresistance by the quantum Monte Carlo

Hiroki Nada

National Institute for Advanced Industrial Scienceand Technology

68 2021-Ba-0001

加藤岳生

東京大学物性研究所

抗効果の理論研究
69 2021-Ba-0016

高次元系におけるテンソルネットワークくりこみ

Takeo Kato

method森田悟史

東京大学物性研究所

Improvement of tensor network renormalization for high-dimensional systems

Tokyo
Satoshi Morita

群の改良
70 2021-Ba-0037

連続体と分子動力学法連成のマルチスケールシ

量子スピン系におけるギャップレスSPT相の研究

Institute for Solid State Physics, The University of
Tokyo

村島

隆浩

東北大学大学院理学研究科

Development of multiscale simulation technique for liquids and solids

ミュレーション手法開発
71 2021-Ba-0045

Institute for Solid State Physics, The University of

Takahiro

東北大学大学院理学研究科

Murashima
押川正毅

東京大学物性研究所

Study on gapless SPT phases in quantum spin systems

Masaki

Institute for Solid State Physics, University of Tokyo

Oshikawa
72 2021-Ba-0002

メゾスコピック素子を介した熱輸送の数値計算加藤岳生

東京大学物性研究所

Numerical study of heat transport through a mesoscopic device

Takeo Kato

Institute for Solid State Physics, The University ofTokyo

73 2021-Ba-0012

パイロクロア反強磁性体で実現するスピンテクス

青山和司

大阪大学大学院理学研究科宇宙地球専攻

Effect of magnetic anisotropy on spin textures in pyrochlore antiferromagnets

Kazushi Aoyama

チャへの磁気異方性の効果
74 2021-Ba-0047

75 2021-Ba-0050

１次元・２次元磁性体の有限温度熱力学量の計算

School of Science, Osaka University
堀田知佐

東京大学総合文化研究科

ガウス過程回帰を用いた効率的な相図探索手法のDevelopment of an Efficient Phase Diagram Exploration Method Using Gaussian

Hiroshi

Process Regression

Watanabe渡辺

宙志

慶応義塾大学理工学部

Biquadratic相互作用のある量子スピン鎖の磁化過

坂井徹

兵庫県立大学大学院理学研究科

ブリージングパイロクロア反強磁性体におけるソフトマテリアルの秩序構造とそのダイナミク

Numerical Diagonalization Study on Magnetization Process of Quantum Spin Chain

Department of Basic Science, The University of
Tokyo

Toru Sakai

Faculty of Science and Technology, Keio University

Graduate School of Science, University of Hyogo

with the Biquadratic Interaction
青山

和司

大阪大学大学院理学研究科宇宙地球専攻

ヘッジホッグ格子相の安定性
78 2021-Ba-0027

Chisa Hotta

low dimensional magnets

程の数値対角化による研究
77 2021-Bb-0034

Development and application of methods to calculate thermodynamic properties in手法の開発と実装

開発
76 2021-Cb-0021

Department of Earth and Space Science, Graduate

Stability of the hedgehog-lattice topological spin texture in breathing-pyrochlore

Kazushi Aoyama

antiferromagnets
福田

順一

九州大学

大学院理学研究院

白井達彦

早稲田大学基幹理工学部

Department of Earth and Space Science, Graduate
School of Science, Osaka University

Calculation of ordered structures, dynamics and optical properties of soft materials

Jun-Ichi Fukuda

The effect of quantum phase transition on the performance of QAOA

Tatsuhiko Shirai

Faculty of Science, Kyushu University

ス、光学的性質の計算
79 2021-Ba-0034

量子近似最適化アルゴリズムに相転移現象が与える影響の探求

School of Fundamental Science and Engineering,
Waseda University
Environmental Management Research Institute,

80 2021-Bb-0014

メタダイナミクス法によるスケール形成制御分子

灘浩樹

産業技術総合研究所環境創生研究部門

デザイン方法の構築

Creation of a Method for Design of Scale Formation Control Molecules by a

Hiroki Nada

Metadynamics Method

National Institute for Advanced Industrial Scienceand Technology

81 2021-Bb-0015

2DMATによる２次元物質の構造解析

高山

あかり

早稲田大学

Structure analysis of 2D materials by using 2DMAT

Akari Takayama Waseda University

82 2021-Bb-0026

高密剛体球系における平衡緩和と相転移礒部雅晴

名古屋工業大学

Equilibration and phase transition in the dense hard sphere systems

Masaharu Isobe Nagoya Institute of Technology

83 2021-Bb-0038

84 2021-Ba-0009

１次元・２次元磁性体の有限温度熱力学量の計算堀田知佐

東京大学総合文化研究科

Development and application of methods to calculate thermodynamic properties in

Chisa Hotta

手法の開発と実装2

low dimensional magnets

トポロジカル超伝導体におけるMajorana量子ビッ

Numerical study on the tolerance of Majorana-based qubits in topologicalTakeshisuperconductors

Mizushima

トの数値シミュレーションによる耐性評価

水島

健

大阪大学基礎工学研究科

155

Department of Basic Science, The University ofTokyo
Osaka University

85 2021-Ba-0039

タンパク質中の不均一な熱輸送物性の解析

倭

剛久

名古屋大学

Non-uniform thermal transport properties in proteins

Takahisa

Nagoya University

Yamato86 2021-Ba-0052

87 2021-Ba-0006

多元球充填を指導原理とする結晶構造探索

１次元フラストレート量子スピン系の数値的研究

河村

光晶

飛田

和男

東京大学物性研究所

Crystal structure search guided by multicomponent sphere packing

埼玉大学大学院理工学研究科物質科学部門

Numerical Study of One Dimensional Frustrated Quantum Spin Systems

MitsuakiInstitute for Solid State Physics, The University of

KawamuraTokyo

Kazuo Hida

Division of Material Science, Graduate School of
Science and Engineering, Saitama University

88 2021-Ba-0023

有向グラフのスペクトル解析によるクラスタリン

羽田野

直道

東京大学生産技術研究所

Novel Spectral Clustering Method of Directed Networks

グの手法開発89 2021-Ba-0044

統計力学に基づくイジングマシンの新規アルゴリ

Naomichi

Institute of Industrial Science, University of Tokyo

Hatano田中宗慶應義塾大学理工学部物理情報工学科

Development of Algorithms for Ising Machines Based on Statistical Mechanics

Shu Tanaka

ズム構築

Dept. Applied Physics and Physico-Informatics, Keio
University
Institute of Multidisciplinary Research for Advanced

90 2021-Ba-0048

量子パイロクロア磁性体の磁気励起研究佐藤卓

東北大学多元物質科学研究所

Magnetic excitations in the quantum pyrochlore magnet

Taku Sato

91 2021-Bb-0002

Patchy粒子系における構造形成

寺尾貴道

岐阜大学工学部

Structural formation of patchy particles

Takamichi Terao Faculty of Engineering, Gifu University

金子

隆威

近畿大学

tensor-network study of the magnetization process of the SU(N) Heisenberg model

Ryui Kaneko

Kindai University

慶應義塾大学

Quantum simulation using Ising models

Yuya Seki

Keio University

Towards a unified understanding of thermodynamic properties in S=1/2 spherical

Fukumotokagome systems {W$̲{72}$V$̲{30}$} and {Mo$̲{72}$V$̲{30}$}

Yoshiyuki

Calculation of ordered structures, dynamics and optical properties of soft materials

Jun-Ichi Fukuda

Faculty of Science, Kyushu University

Fractional Vortices in Topological Nematic Superfluids

Yusuke Masaki

Tohoku University

高エネルギー加速器研究機構物質構造科学研究 Large-scale molecular-dynamics simulation of silica melt and glass under highDaisukeInstitute of Materials Structure Science, High Energy

所

pressure with ANN potentials by active learning

Wakabayashi

Accelerator Research Organization (KEK)

早稲田大学基幹理工学部

Circuit-depth dependence of quantum approximate optimization algorithm

Tatsuhiko Shirai

Theoretical study of thermoelectric properties in doped Fe$̲{2}$VAl: A weak-

Kazutaka

Graduate School of System Informatics, Kobe

的研究：弱結合理論からのアプローチ

coupling approach

Nishiguchi

University

異なる幅を持つグラフェンナノリボンの電子状態

Investigations of electronic structures and reactivity of graphene nanoribbons with

Kenta Arima

Graduate School of Engineering, Osaka University

Materials, Tohoku University

92 2021-Bb-0007

テンソルネットワーク法によるSU(N) Heisenberg
模型の磁化過程の研究

93 2021-Bb-0035

イジングモデルを利用した量子シミュレーション

関優也

S=1/2球体カゴメ系{W$̲{72}$V$̲{30}$},94 2021-Ba-0032{Mo$̲{72}$V$̲{30}$}の熱力学的性質の統一的理解 福元

好志

東京理科大学へ向けて
95 2021-Bb-0013

ソフトマテリアルの秩序構造とそのダイナミク

福田

順一

九州大学

正木

祐輔

東北大学

若林

大佑

大学院理学研究院

Tokyo University of Science

ス，光学的性質の計算
96 2021-Bb-0018

トポロジカルネマティック超流動の分数渦
高圧下におけるシリカメルトおよびガラスの大規

97 2021-Bb-0023

模分子動力学シミュレーションのためのANNポテ
ンシャルの能動学習

98 2021-Bb-0027

量子近似最適化アルゴリズムにおける回路深さ依

白井

達彦

存性の探求
99 2021-Bb-0033

100 2021-Ba-0010

ドープされたFe$̲{2}$VAlの熱電性能に関する理論

Waseda University
西口

有馬

和孝

健太

神戸大学大学院システム情報学研究科

大阪大学 大学院 工学研究科と反応性調査101 2021-Ba-0049

有機電荷秩序材料における電気伝導度変調の起源

different widths

103 2021-Ba-0014

Patchy粒子系における構造形成
テンソルネットワーク法による2次元冷却原子系の正俊

千葉大学大学院工学研究院電気電子

Origin of the electronic conductivity on organic charge order materials

Masatoshi Sakai

寺尾貴道

岐阜大学工学部

Structural formation of patchy particles

Takamichi Terao Faculty of Engineering, Gifu University

金子

隆威

近畿大学

Chiba University

tensor-network calculation of real time dynamics in two-dimensional cold atom

実時間ダイナミクスの計算
104 2021-Bb-0008

可逆架橋ゴムの分子動力学シミュレーション

Department of Electrical and Electronic Engineering,

酒井に関する研究102 2021-Ba-0004

School of Fundamental Science and Engineering,

Ryui Kaneko

Kindai University

systems保田侑亮

国立研究開発法人

産業技術総合研究所

Molecular Dynamics Simulations of Reversibly Crosslinked Rubbers

Yusuke Yasuda

Numerical Study of the One-Dimensional Quantum Spin Systems with Spatial

Takashi

Structures

Tonegawa

National Institute of Advanced Industrial Scienceand Technology

105 2021-Ba-0003

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

156

Graduate School of Science, Kobe University

106 2021-Ba-0008
107 2021-Ba-0040

108 2021-Bb-0003

109 2021-Bb-0009

高密剛体球系における非平衡応答と相転移
非整合積層系の電子状態：モデル化の検証と応用

空間構造をもつ一次元量子スピン系の数値的研究
固体電解質材料における粒界イオン伝導の分子動

礒部
苅宿

雅晴
俊風

利根川

小林

孝

亮

名古屋工業大学

Nonequilibrium response and phase transition in the dense hard sphere systems

物材機構

神戸大学大学院理学研究科

三角格子及びかごめ格子上のハイゼンベルグ反強細胞の集団回転運動のシミュレーション

Kariyado

Numerical Study of the One-Dimensional Quantum Spin Systems with Spatial

Takashi

Structures

Tonegawa
Ryo Kobayashi

NIMS

Graduate School of Science, Kobe University

Nagoya Institute of Technology

electrolyte
福元好志

東京理科大学

磁性体の励起スペクトルの数値的研究
111 2021-Ca-0023

the modeling scheme

Molecular dynamics analyses of ion migration at grain boundaries in solid state

名古屋工業大学

力学解析
110 2021-Bb-0029

Masaharu Isobe Nagoya Institute of Technology

Electronic structure in mismatched multilayer systems: evaluation and application of Toshikaze

松下勝義

大阪大学理学研究科

Numerical studies on excitation spectra of Heisenberg antiferromagnets on the

Fukumoto

triangular and Kagome lattices

Yoshiyuki

Simulation of Cell Collective Rotation

Katsuyoshi

Tokyo University of Science

Graduate School of Science, Osaka University

Matsushita
112 2021-Ba-0042
113 2021-Ba-0021

有効モデル推定の誤差評価手法開発
スピン量子ビット伝導機構の解明

田村
棚本

亮
哲史

国立研究開発法人 物質・材料研究機構
帝京大学

Evaluation method of error in effective model estimation
Analysis of transport properties of spin-qubit based on FinFET

Ryo Tamura
Tetsufumi

National Institute for Materials Science
Teikyo University

Tanamoto
114 2021-Bb-0025

反転対称なハバード模型における多重Q秩序の自内田尚志

Spontaneous formation of multiple-Q orders in inversion-symmetric Hubbard

北海道科学大学発形成
115 2021-Bb-0028

有機電荷秩序材料における秩序構造と電気伝導性

Takashi Uchida酒井正俊

千葉大学大学院工学研究院電気電子

Charge order structure in organic charge order materials

Masatoshi Sakai

に関する研究116 2021-Cb-0003

細胞塊の回転-並進運動遷移の数値研究

Hokkaido University of SciencemodelsDepartment of Electrical and Electronic Engineering,
Chiba University
松下勝義

大阪大学理学研究科

Numerical Study of Rotation-Translation Motion Transition of Cell Clusters

Katsuyoshi

Graduate School of Science, Osaka University

Matsushita
Center for Quantum Information and Quantum
117 2021-Ba-0013

固有値ソルバの統一的インターフェースRokkoの開坂下

達哉

発と量子スピン系への応用

118 2021-Ba-0036

反転対称な二次元ハバード模型における多重スピ

大阪大学

世界最先端研究機構

子生命研究センター

量子情報・量 Development of integrated interface of eigensolvers Rokko and application to内田尚志

quantum spin systems

北海道科学大学

Multiple spin density waves in inversion-symmetric two-dimensional Hubbard

ン密度波
119 2021-A-0002
120 2021-A-0003

トポロジカル超流動の分数渦に対する微視的計算
ANNポテンシャルを用いた高圧下におけるシリカ

121 2021-A-0008

Sakashita

122 2021-A-0014

Osaka University
Takashi Uchida

Hokkaido University of Science

正木
若林

祐輔
大佑

藤野

智子

東北大学

Yusuke Masaki

Tohoku University

高エネルギー加速器研究機構物質構造科学研究 Large-scale molecular-dynamics simulation of silica melt under high pressure with

Microscopic calculations of fractional vortices in topological superfluids

DaisukeInstitute of Materials Structure Science, High Energy

所

ANN potentials

Wakabayashi

Accelerator Research Organization (KEK)

東京大学物性研究所

Electronic states of electron-rich oligomer-based conductors

Tomoko Fujino析THz光が誘起するグラフェン中の電子ダイナミクス

Biology, International Advanced Research Institute,models

メルトの大規模分子動力学シミュレーション
電子豊富なオリゴマー型有機伝導体の電子構造解

Tatsuya

Institute for Solid State Physics, The University of
Tokyo

佐藤

駿丞

筑波大学計算科学研究センター

Theoretical investigation on THz-field induced electron dynamics in graphene

Shunsuke Satoの理論的研究Center for Computational Sciences, University ofTsukuba
Faculty of Advanced Engineering, Tokyo University

123 2021-A-0018

複合材料用マトリクス樹脂の分子動力学計算

大矢豊大

東京理科大学先進工学部

Molecular dynamics simulation of matrix resin for composite materials

Yutaka Oya

124 2021-A-0019

カイロ-フラクタル格子における基底状態

岩瀬

文達

東京医科大学The ground state of cairo-fractal lattice

Fumitatsu Iwase Tokyo Medical University

北川

健太郎

東京大学理学系研究科物理学専攻

Screening test for crystal nucleation of flux methodof Science

125 2021-A-0020

フラックス法単結晶育成のための核成長用素材ス
クリーニングKentaroDepartment of physics, University of Tokyo

Kitagawa
Center for Quantum Information and Quantum

126 2021-Bb-0024

固有値ソルバの統一的インターフェースRokkoの開発と量子スピン系への応用

坂下

達哉

大阪大学

世界最先端研究機構

子生命研究センター

量子情報・量 Development of integrated interface of eigensolvers Rokko and application toquantum spin systems

157

Tatsuya
Sakashita

Biology, International Advanced Research Institute,
Osaka University

127 2021-Bb-0030

ゆっくり地震との相互作用による通常の地震の周鈴木

岳人

青山学院大学期変化
128 2021-Ba-0031

既存Juliaパッケージを活用した分光データの非線形回帰分析の並列化

Change in period of ordinary earthquakes due to the interaction with slow

Takehito Suzuki

Aoyama Gakuin University

earthquakes
牧野哲征

福井大学遠赤外領域開発研究センター

Parallel nonlinear regression analysis for spectroscopic data with existing Julia
packages

158

Takayuki Makino

Research Center for Development of Far-Infrared
Region, University of Fukui

2021年度

CCMSスパコン共用事業枠課題一覧 / Supercomputing Consortium for Computational Materials Science Project List of Supercomputer System 2021
※共同利用ではなく共用事業の採択課題一覧。所属は申請時のデータ

前期課題/ The first half term
No.

課題番号
1

課題名
希薄電解液の界面張力の大規模分子シミュレーション

氏名
芝

所属
隼人

Title
Interfacial tension of dilute electrolyte liquid: large-scale molecular simulation

東京大学

Name

Organization

Hayato Shiba

University of Tokyo

study
擬二次元有機物質κ型BEDT-TTF分子性導体に対する第一原理有効ハミルト

2

吉見 一慶

A systematic ab initio study of quasi-two-dimensional molecular conductors κ Kazuyoshi

東京大学

ニアンの網羅的解析
3

大規模GW/BSE法による金属-有機ハイブリッド系の電子状態計算-type BEDT-TTF salts
藤田貴敏

Large-Scale GW/BSE electronic structure calculations for metal-organic hybrid

分子科学研究所

University of Tokyo

YoshimiTakatoshi Fujita

Institute for Molecular Science

Electron Theory on Secondary-Battery Materials

Tamio Oguchi

Osaka University

Ab initio study toward abundant element nanocatalysts with less precious

TetsuyametalsTaketsugu

Integrated analyses on spectroscopic experiments and ab initio electronic

Masatoshi

Waseda University/Toyota Physical and Chemical

structure calculations for mechanisms of unconventional superconductors

Imada

Research Institute

Quantum-theory-based multiscale simulation for next-generation power

AtsushidevicesOshiyama

Development of high-throughput calculation tools and evaluation of

Tetsuyamagnetic properties in hard magnetic materials

Fukushima

materials
4二次電池材料の電子論

5

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

6

分光実験と第一原理計算解析の統合解析による非従来型超伝導機構の解明
省エネルギー次世代半導体デバイス開発のための量子論マルチシミュレー

7

小口
武次

多美夫

今田

徹也

正俊

押山 淳

大阪大学
北海道大学大学院

早稲田大学/豊田理化学研究所

名古屋大学

ション
第一原理自動網羅計算に基づいた高精度・高速度のハイスループット材料計

8

福島 鉄也

東京大学

算ソフトウェアの開発・拡張と磁気特性の評価
全固体ナトリウム金属電池創成のための新規塩化物固体電解質材料の探索

9

中山

将伸

名古屋工業大学

Novel chloride solid electrolytes for all solid-state sodium metal battery (2)(2)
10大規模計算とデータ駆動手法による高性能永久磁石の開発

Masanobu

固体電解質界面におけるイオン液体の最適状態探索

Nagoya University

University of Tokyo

Nagoya Institute of Technology

Nakayama
三宅隆

産業技術総合研究所

Development of high-performance permanent magnets by large-scale

Takashi Miyake

simulation and data-driven approach
11

Hokkaido University

鷲津仁志

兵庫県立大学大学院

Search for the optimum state of the ionic liquid at the solid electrolyte

National Institute of Advanced Industrial Scienceand Technology

Hitoshi Washizu University of Hyogo

interface

後期課題/ The second half term
No.

課題番号
1

課題名
希薄電解液のイオン解離結合の長時間分子シミュレーション

氏名
芝

所属
隼人

Title
Ion dissociation and association in dilute electrolyte liquid: long-time

東京大学

Name

Organization

Hayato Shiba

University of Tokyo

molecular dynamics study
2

擬二次元有機物質Pd(dmit)2塩の第一原理有効ハミルトニアンの温度依存性

吉見 一慶

東京大学

とその解析
3

電子状態計算をベースとした非線形光学応答理論の確立とバイオ系・ナノ系

藤田貴敏

量子科学技術研究開発機構

への応用
4
5
6

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
炭素導電助剤へのアニオン挿入機構の理論的解析
電子デバイス応用に向けた軽元素B, C, Nからなる原子膜積層系の設計と物性

Finite temperature dependence of ab-initio Hamiltonians and its analysis for

Kazuyoshi

Pd(dmit)2 Salts

YoshimiDevelopments of non-linear optical response theory based on electronic

Takatoshi Fujita

structure calculations and their applications to nano and biological systems
武次

徹也

山田 淳夫
斎藤

晋

北海道大学大学院
東京大学
東京工業大学Technology
TetsuyametalsTaketsugu

Theoretical Analysis of Anion Insertion Mechanism into Conductive Carbon

Atsuo Yamada

University of Tokyo

Susumu Saito

Tokyo Institute of Technology

next-generation devices

159

National Institutes for Quantum Science and

Ab initio study toward abundant element nanocatalysts with less precious

Electronic properties and materials design of stacked B-C-N atomic layers for

予測

University of Tokyo

Hokkaido University

78

銅酸化物の超伝導機構解析
省エネルギー次世代半導体デバイス開発のための量子論マルチシミュレー

今田

正俊

押山 淳

早稲田大学/豊田理化学研究所

名古屋大学

ション

Analysis on Superconducting Mechanism of Cuprate Superconductors

Masatoshi

Waseda University/Toyota Physical and Chemical

Imada

Research Institute

Quantum-theory-based multiscale simulation for next-generation power

AtsushidevicesOshiyama

Nagoya University9

磁性界面の第一原理計算

合田 義弘

東京工業大学First-principles study of magnetic interfaces

Yoshihiro Gohda Tokyo Institute of Technology

10

次世代型燃料電池のための酸化物電極物質の設計

杉野 修

東京大学

Design of oxide electrocatalyst for next-generation fuel cells

Osamu Sugino

High-throughput calculation of magnetic anisotropy energy in permanent

Tetsuyamagnet materials

Fukushima

11

永久磁石材料を対象とした磁気異方性エネルギーのハイスループット計算

福島 鉄也

東京大学

160

University of Tokyo
University of Tokyo

The Institute for Solid State Physics (ISSP), The University of Tokyo
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