Ⓒ 2015 The Institute for Solid State Physics, The University of Tokyo

Activity Report
2014

Preface		1

Research Highlights		

2 - 29Highlights of Joint Research

30 - 51

Conferences and Workshops

52 - 59

Subjects of Joint Research

60 - 149

Publications

150 - 182

The Institute for Solid State Physics (ISSP), The University of Tokyo
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5-1-5 Kashiwanoha, Kashiwa, Chiba, 277-8581, JapanPhone+81-4-7136-3207

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Preface

We are pleased to present the annual ISSP Activity Report for
the academic year 2014. ISSP (Institute for Solid State Physics) wasestablished in 1957 as a joint-use research institution attached to the
University of Tokyo. Since then both in-house research and collaboration with external users have been essential elements of the activities
of ISSP.
The research at ISSP has been pursued along two major directions.
Synthesis of new materials and nano-structures in search for novel
phenomena and functions using advanced and original techniques is at
the core of modern condensed matter science. Such activities are being
conducted by relatively small independent groups at ISSP and their collaborators. At the same time, importance of large experimental and computational facilities in materials science has been rapidly increasing inrecent years. An important mission of ISSP is active participation in the development and operation of some ofthose large facilities that are difficult to maintain for typical university faculties. Notable achievements in thisdirection are summarized below.
(1) ISSP has been operating supercomputers dedicated to materials science. In addition, the Center ofComputational Materials Science provides technical supports to facilitate use of massively parallel computational resources such as the K-computer. (2) The International MegaGauss Science Laboratory continues todevelop both the destructive ultrahigh magnetic field by electromagnetic compression aimed at 1000 tesla andthe non-destructive long-pulse magnetic field by a flywheel generator. (3) ISSP has been providing external
users access to advanced spectroscopy that uses quantum beams such as neutron and synchrotron light sources.
It is a pity for the neutron scattering society that the JRR-3 reactor at Tokai has been shut down after the earthquake in 2011 but we are expecting reopening in near future. The pulsed neutron spectrometer at J-PARC
developed jointly by ISSP and KEK is now in operation. At the Laser and Synchrotron Research Center, we
explore frontier of advanced spectroscopy in ultraviolet and soft X-ray region by combining high power laser
being developed in Kashiwa and synchrotron beamline installed in Spring-8.

June, 2015

Masashi Takigawa
Director
Institute for Solid State Physics
The University of Tokyo

ISSP Activity Report 20141

Research Highlights
Novel Phase Transitions in theBreathing Pyrochlore Lattice:
7
Li-NMR on LiInCr4O8 and LiGaCr4O8
Takigawa and Hiroi Group
Antiferromagnetically coupled spins on the pyrochlore
lattice, a three dimensional network of corner sharing tetrahedra, are expected to show exotic magnetic properties
due to strong geometrical frustration. The Cr spinel oxides
ACr2O4 (A = Mg, Zn, Cd etc.) are well-known examples,
where Cr3+ with spin 3/2 form a pyrochlore lattice. Recently,
Okamoto et al.[1] studied a new type of Cr oxides LiInCr4O8
and LiGaCr4O8, where Li+ and In3+/Ga3+ ions alternately
occupy the A site of ACr2O4, allowing Cr spins to form abreathing pyrochlore lattice with alternation of large andsmall tetrahedra and two distinct exchange coupling J and J’(J > J’) (see Fig. 1). Here we report on novel phase transi-

Fig. 1. The structure of the breathing pyrochlore lattice.

Fig. 2. Upper panel: Temperature dependences of 1/T1 (this work) andthe specific heat divided by temperature (taken from [1]) in LiInCr4O8.
The line shows an activation law with a spin gap of 31 K. Lower
panel: Temperature dependences of 1/T1 of the paramagnetic (red) andantiferromagnetic (blue) components in LiGaCr4O8. The shaded area
represents the temperature range, where the NMR spectra in Fig. 3
indicate coexistence of two phases. The solid line shows a fit to a powerlaw divergence towards 13 K. The inset shows the recovery curves
at different temperatures. The data at 14 K can be fit to a sum of two
components.

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ISSP Activity Report 2014

Fig. 3. Temperature dependence of
the NMR spectra in LiGaCr4O8.
The vertical scale is normalized by
the peak intensity. The origin of thehorizontal axis corresponds to thecenter of gravity.

Fig. 4. Schematic phase diagramfor LiGaCr4O8. On the verticalaxis, α represents a phenomenological tuning parameter ofthe Hamiltonian. The region Δαshows the distribution of α in our
sample. The dashed and solid
double lines indicate first- andsecond-order transitions, respectively, which are separated by atricritical point indicated by theopen circle.

tions observed by 7Li-NMR in LiInCr4O8 and LiGaCr4O8,
for which the breathing factor Bf=J’/J is estimated to be 0.1
and 0.6, respectively [2].
As shown in the upper panel of Fig. 2, the nuclear spin
relaxation rate (1/T1) in LiInCr4O8 shows activated temperature dependence down to 18 K, indicating a singlet groundstate with a spin gap of 31 K. This behavior, however, isdisrupted by double phase transitions, one corresponding
to the peak at 13 K in 1/T1 and another to the peak at 16 K
in the specific heat. The former indicates a second orderantiferromagnetic (AF) transition with critical slowing down.
The AF order is also confirmed by the broadening of NMR
spectrum. The latter peak in the specific heat most likely
corresponds to a structural transition, which lowers thesymmetry of the lattice and thereby relieves the frustration,
enabling the AF order at a lower temperature.
The behavior in LiGaCr4O8 is quite different. As shownin Fig. 3, a broad NMR spectrum develops below 16 K
under a sharp peak that persists down to 13.5 K, indicating
coexistence of the paramagnetic and AF ordered phases.
Furthermore, the width of the broad spectrum does notdepend on temperature, meaning that the magnitude of
AF moments is constant once the transition has occurred.
Therefore, AF transition must be first order. The results of
1/T1 in the lower panel of Fig. 2 also support coexistence oftwo phases. Surprisingly, 1/T1 of the paramagnetic component shows divergence toward 13 K as if there were second
order AF transition. This transition, however, is not realized
because the intensity (volume fraction) of the paramagnetic
component vanishes near 13 K. These observations suggestthat LiGaCr4O8 is located near a tricritical point in the phase
diagram that separate first- and second-order transition lines
as shown in Fig. 4.

The contrasting behavior of the two compounds demonstrates that breathing pyrochlore materials provide unique
opportunities to tune the degree of frustration in a controlledmanner.
References[1] Y. Okamoto, G. J. Nilsen, J. P. Attfield, and Z. Hiroi, Phys. Rev.
Lett. 110, 097203 (2013).
[2] Y. Tanaka, M. Yoshida, M. Takigawa, Y. Okamoto, and Z. Hiroi,
Phys. Rev. Lett. 113, 227204 (2014).
Authors
Y. Tanaka, M. Yoshida, M. Takigawa, Y. Okamoto, and Z. Hiroi

Field-Induced Quantum Criticality
and Universal Temperature
Dependence of the Magnetizationof a Spin-1/2 Heisenberg Chain
Sakakibara GroupThe spin-1/2 Heisenberg antiferromagnet in one dimension is one of the few exactly solvable models of stronglyinteracting systems [1]. By now, we have complete understanding of its static properties, and much progress has
been made in elucidating its dynamics and excited states.
Yet experimental verifications of theoretical predictions onthese properties are still limited. There has been a total lackof systematic experiments, in particular, near the magneticfield-induced quantum critical point, at which the system
undergoes a quantum phase transition from a quantum
disordered Tomonaga-Luttinger liquid (TLL) to a gapped
ferromagnet [1]. We have made precise dc magnetization
measurements of Cu(C4H4N2)(NO3)2, CuPzN, an ideal
one-dimensional spin-1/2 Heisenberg antiferromagnet, near
the critical field Hs [2]. The power-law dependences of themagnetization on temperature and magnetic field determinedby this experiment are in excellent agreement with theory.
Figure 1(a) shows the magnetization M of CuPzN at
0.08 K as a function of the magnetic field up to 14.7 T. M(H)shows a strong upturn as Hs (=13.97 T) is approached, andsaturates to the value Ms=1.15 μB/Cu. The relation Hs=J/Ms
yields the intrachain interaction J=10.8 K. Theory predicts
that M(H) close to Hs exhibits a singularity 1-M/Ms =D(1-H/Hs)1/δ, where D is a constant (=4/π) and the exponent

Fig. 2. T vs H phase diagram of CuPzN. Open circles denote theposition of Tp. The dotted line is the universal crossover line for thefree-fermion limit.

δ=2 [3]. Fitting the expression to the data between 13.6 and13.9 T yields D=1.24 and δ=1.98, in agreement with thepredicted values. Open squares in Fig. 1(a) indicate the exact
curve for 0.08 K calculated by the quantum transfer-matrix(QTM) method [4], in close agreement with our experimental data in the whole field range.
The temperature dependence of M/H is shown in Fig.
1(b) for several magnetic fields. In the limit of H→0, M/H
is expected to reach a maximum at Tp~0.641J [3]. This
relation, combined with the experimental value of Tp=6.89 K
at 1 T, yields J=10.8 K, in perfect agreement with the value
determined from the M(H) data. As the field increases, Tp
gradually decreases, and at 13.9 T the magnetization peak
eventually vanishes into a temperature region well below
0.08 K. At H=Hs, excitations (magnons) from the ferromagnetic state can be described exactly as free fermions,and M(T) is predicted to exhibit a square-root singularity
Ms-M=bMs(kBT/J)1/2 [5] with the coefficient b=0.48264.
This equation can be fitted very well to the 14 T data withb=0.460, in good agreement with theory.
The magnetic phase diagram of CuPzN is presented inFig. 2 on the basis of d(M/H)/dT, with Tp superposed toindicate the crossover to the TLL phase. The free-fermion
description gives a parameter-free expression for T p ,kBTp=1.52476Ms(Hs-H) [5]. This universal relation, shown
as a dotted line with Ms and Hs obtained from the M(H)data, with no fitting parameter, agrees excellently with thedata near Hs. As the magnetic field decreases, Tp deviates
downward from the straight line, owing to the repulsion
between magnons.
The quantum critical behavior of the magnetizationof CuPzN withstands quantitative tests against theory [2],demonstrating that the material is a practically perfect
one-dimensional spin-1/2 Heisenberg amtiferromagnet.
References[1] T. Giamarchi, Quantum Physics in One Dimension (Oxford University Press, Oxford, England, 2004).
[2] Y. Kono, T. Sakakibara, C. P. Aoyama, C. Hotta, M. M. Turnbull, C.
P. Landee, and Y. Takano, Phys. Rev. Lett. 114, 037202 (2015).
[3] J. C. Bonner and M. E. Fisher, Phys. Rev. 135, A640 (1964).
[4] A. Klümper, Z. Phys. B 91, 507 (1993).
[5] Y. Maeda, C. Hotta, and M. Oshikawa, Phys. Rev. Lett. 99, 057205(2007).

Fig. 1. Field dependence of the magnetization of CuPzN at 0.08 K(dots), along with the result of exact QTM calculations (open squares)
for the 1D spin-1/2 Heisenberg antiferromagnet at 0.08 K. Temperaturedependence of M/H at various fields.

Authors
Y. Kono, T. Sakakibara, C. P. Aoyamaa, C. Hottab, M.M. Turnbullc,
C. P. Landeec, and Y. TakanoaaUniversity of Floridab
The University of Tokyoc
Clark University

ISSP Activity Report 20143

Switching of Conductivity andMagnetism by Coupled Deuterium andElectron Transfer in a Purely Organic
Conductor κ-D3(Cat-EDT-TTF)2
Mori GroupA hydrogen bond (H-bond) is one of the most fundamental and important non-covalent interactions in chemistry,
biology, physics, and all other molecular sciences. In
particular, the dynamics of a proton or a hydrogen atomin the H-bond has attracted increasing attention, because
it plays a crucial role for (bio)chemical reactions andsome physical properties, such as dielectricity and proton
conductivity. Here we report unprecedented H-bonddynamics-based π-electronic switching of conductivity andmagnetism in an H-bonded purely organic conductor crystal,κ-D3(Cat-EDT-TTF)2 (abbreviated as κ-D) [1].
This novel crystal κ-D, a deuterated analogue of
κ-H 3 (Cat-EDT-TTF) 2 (abbreviated as κ-H [2,3]), is
composed only of an H-bonded molecular unit, in which
two crystallographically equivalent catechol-fused
ethylenedithiotetrathiafulvalene (Cat-EDT-TTF) skeletonswith a +0.5 charge are linked by a symmetric anionic[O···D···O]–1-type strong H-bond (Fig. 1). The deuterated
and parent hydrogen systems, κ-D and κ-H, are isostructuraland paramagnetic semiconductors with a dimer-Mott-type
electronic structure in triangular lattice at room temperature. However, the ground states of κ-D and κ-H are totallydifferent. As shown in Fig. 2(a), ρ of a single crystal of
κ-D (blue circles) monotonically increased with decreasing
temperature from 300 K to 182 K, showing typical semiconducting behavior similar to that of the parent κ-H (black
circles). The room-temperature electrical conductivity
σrt (= 1/ρrt) and activation energy Ea of κ-D (6.2 Scm–1,
0.08 eV) are, however, slightly higher and lower than thoseof κ-H (3.5 Scm–1, 0.11 eV), respectively, probably related
to deuterium dynamics. Upon further cooling, κ-D showeda rapid increase in ρ at 182 K, to undergo a semiconductorinsulator-like phase transition, which is in sharp contrast to
the continuous monotonic semiconducting behavior in κ-H.
Such a remarkable H/D substitution effect is also observedin the temperature dependence of the magnetic suscepti-

Fig. 1. Schematic drawing of thermal switching of electrical conductivity and magnetism in κ-D3(Cat-EDT-TTF)2. A purely organic
material, κ-D3(Cat-EDT-TTF)2, is composed of a unit structure where
Cat-EDT-TTF molecules (green colored, left) are connected by an[O···D···O] hydrogen bond. At 185 K (–88 °C), the deuterium andelectron transfer occurs, to change the electric charge on the two
Cat-EDT-TTF molecules [(+0.5 vs +0.5) ↔ (+0.06 vs +0.94)], which
results in the switching of electrical conductivity (semiconductor↔insulator) and magnetism (paramagnetic ↔ nonmagnetic).

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ISSP Activity Report 2014

Fig. 2. Temperature dependence of (a) electrical resistivity (on a single
crystal) and (b) magnetic susceptibility (of a polycrystalline sample) of
κ-D (blue and red circles represent the cooling and heating processes,
respectively) and κ-H (black circles in the cooling process). The orange
line represents the fitting curve for κ-D by the singlet-triplet dimer
model with an antiferromagnetic coupling of 2J/kB ~ –600 K.

bility (χp) of κ-D and κ-H in the polycrystalline state in thetemperature range of 2–300 K (Fig. 2(b)). With decreasing
temperature, χp of κ-H (black circles) follows the Heisenberg model of triangular lattice with J/kB = 80 – 100 K
and shows no magnetic order down to 50 mK, indicating
quantum spin liquid state [4]. On the other hand, thedeuterated analogue κ-D (blue circles) exhibits an abrupt
drop of χp at 185 K after the monotonic increase similar toκ-H. After the abrupt drop, χp of κ-D gradually approaches~ 0.0 emu mol −1 with decreasing temperature. This
low-temperature magnetic behavior is reproduced by thesinglet-triplet dimer model with an antiferromagnetic
coupling of 2J/kB ~ –600 K (orange line in Fig. 2(b)). Therefore, a spin-singlet state is formed in κ-D by the magnetictransition from the high-temperature (HT) paramagnetic
phase, which leads to a non-magnetic ground state, in sharp
contrast to κ-H with a quantum spin liquid ground state.
Such a surprisingly large increase in Tc by over 180 K, deuterium isotope effect, has not been reported, to our knowledge.
In order to gain structural insight into this deuterationinduced phase transition with the electronic switching, wehave carried out X-ray diffraction studies on a single crystalof κ-D using synchrotron radiation in the temperature rangeof 50–270 K. The κ-D system at 270 K is isostructural toκ-H (vide infra). Upon the phase transition, the H-bonded
deuterium transfers from the center of the two oxygen
atoms towards one oxygen atom, to form an asymmetric[O–D•••O]–1 H-bond with short O–D (1.02(5) Å) and longO•••D (1.51(5) Å) distances (Fig. 1 right), instead of thetwo equivalent O•••D distances at 270 K (1.265(7) Å, Fig.1
left). As a result, the two crystallographically equivalent
Cat-EDT-TTF+0.5 skeletons in the HT phase are also desymmetrized, to give a charge-poor Cat-EDT-TTF+0.06 with theshort O–D distance and a charge-rich Cat-EDT-TTF+0.94
with the long O•••D distance, as estimated from the bondlengths of the TTF skeletons. Due to the intra-unit charge
disproportionation through the H-bond, the overall electronic
structure of κ-D in the LT phase is intrinsically different
from that in the HT phase. Below 180 K, the charge-rich(blue-colored) and -poor (orange-colored) Cat-EDT-TTF
skeletons are separately π-dimerized with their neighboring
cofacial Cat-EDT-TTF skeletons having the same valence, toform two kinds of π-dimeric pairs, composed of the chargerich skeletons or the charge-poor ones. These π-dimers arestacked two-dimensionally with maintaining the κ-typemolecular arrangement, which results in a charge-ordered(CO) electronic structure (Fig. 1 right) from a dimer-Mottstate in the HT phase (Fig. 1 left). In this CO state, since
the charge-rich TTF+0.94 skeleton is expected to have nearly
one electron spin (S = 1/2), a spin singlet should be formed
within each charge-rich π-dimer, which rationalizes theparamagnetic–non-magnetic transition in magnetic susceptibility (Fig. 2(b)) as well as the semiconductor-insulator-like
transition in resistivity (Fig. 2(a)).
In summary, we have discovered unprecedented
H-bond-dynamics-based π-electronic properties switchingin an purely organic conductor crystal: Deuteration of
the [O•••H•••O]–1 H-bond in a catechol-fused TTF-based
purely organic conductor crystal, κ-H3(Cat-EDT-TTF)2or κ-H, gives rise to a phase transition at 185 K withsignificant switching of the π-electronic structure (dimerMott ↔ charge order), electrical conductivity (semiconducting ↔ insulating), and magnetism (paramagnetic ↔
non-magnetic), due to deuterium transfer or displacement
within the H-bond accompanied by electron transfer between
the H-bonded Cat-EDT-TTF π-systems. This result clearly
demonstrates that the H-bonded deuterium dynamics andthe TTF π-electron are cooperatively coupled in the present
system. Further systematic tuning of proton and π-electron
dynamics in this coupled system will afford novel chemicaland physical functionalities beyond the framework of
π-electronics so far.

drive novel types of metallic states and unconventional
superconductivity has been an active area of research. Sincef - electron systems may provide a non-magnetic crystalelectric-field (CEF) ground-state doublet, where orbitals
are the only active degree of freedom, we can study thepure orbital contribution. In fact, some Pr (4f 2)-based
cubic compounds are found to host the Γ3 non-Kramers
ground-state doublet, which has no magnetic moment but
carries an electric quadrupole moment. A number of cubic
4f 2Γ3 systems were studied and various interesting electric
phenomena were experimentally reported including a ferro
and antiferro quadrupolar ordering. As a competing effect,a non-magnetic form of the Kondo effect has been proposedthat quenches the quadrupole moments. Thus, the tuning ofthese competing effects may lead to quadrupolar quantum
criticality.
In fact, strong hybridization effects and quadrupolar
quantum criticality have been suggested by recent intensive
studies on the new cubic Γ3 systems PrT2Al20, where T corresponds to transition metals such as Ti and V [1-5]. Evidence
for strong hybridization in PrV2Al20 is further provided by
the recent discovery of heavy-fermion superconductivity
at Tc = 50 mK in the quadrupolar ordered state below TQ =0.6 K [4]. The effective mass of the quasiparticles participating into the superconducting condensate was found tobe as large as 140 m0[4]. This result indicates that PrV2Al20
should be located in the vicinity of a QCP associated onlywith multipole moments. To realize such quantum criticality due to multipole moments, the magnetic field is oneof the useful control parameters. The quantum criticality
is expected to be observed near the critical field of thequadrupolar ordered state with TQ = 0.6 K on the basisof the similarity to the magnetically ordered system. The

References[1] A. Ueda, S. Yamada, T. Isono, H. Kamo, A. Nakao, R. Kumai, H.
Nakao, Y. Murakami, K. Yamamoto, Y. Nishio, and H. Mori, J. Am.
Chem. Soc. 136 (34), 12184 (2014).
[2] H. Kamo, A. Ueda, T. Isono, K. Takahashi, and H. Mori, Tetrahedron Lett. 53, 4385 (2012).
[3] T. Isono, H. Kamo, A. Ueda, K. Takahashi, A. Nakao, R. Kumai, H.
Nakao, K. Kobayashi, Y. Murakami, and H. Mori, Nature Commun. 4,1344 (2013).
[4] T. Isono, H. Kamo, A. Ueda, K.Takahashi, M. Kimata, H. Tajima,
S. Tsuchiya, T. Terashima, S. Uji, and H. Mori, Phys. Rev. Lett. 112,
177201 (2014).
Authors
A. Ueda, S. Yamada, T. Isonoa, H. Kamo, A. Nakaob, R. Kumaic, H.
Nakaoc, Y. Murakamic, K. Yamamotod, Y. Nishioe, and H. MoriaNational Institute for Materials SciencebComprehensive Research Organization for Science and Society(CROSS),c
CMRC and Photon Factory, Institute of Materials Structure Science,High Energy Accelerator Research Organization (KEK)d
Okayama University of ScienceeToho University

Field-Induced Quadrupolar
Quantum Criticality in PrV2Al20
Nakatsuji Group
Extensive studies have revealed nontrivial metallic
phenomena associated with a magnetic quantum criticality
in various correlated electron systems. Whether anothertype of instability due to orbital degree of freedom may

Fig. 1. (a) Magnetic phase diagram of PrV2Al20 with magnetic fields,
and current I, parallel to the [111] direction. Color plot indicates theρ(H, T) values obtained from the field H scans at a constant T. Circles
indicate the peak position at Hc = 11 T, separating the low field multipolar ordering phase (MOP) and the paraquadrupolar state at highfields. Triangles represent small peaks observed in ρ(H) for fields below
2 T. The solid line and broken line show the transition temperature/fieldof the multipole ordered phase and the peak position in ρ(H), respectively. Squares and diamonds respectively indicate TQ and a characteristic temperature TFL below which ρ(T) follows the Fermi-liquid T 2 law.
The dotted line is a guide to the eyes. (b) ρ as a function of T1/2 under
H = 11 T and 11.5 T. (c) Field dependence of A-1/2, where A is the T 2
coefficients in ρ(T). According to the standard Fermi liquid theory, theeffective mass m* is proportional to A1/2.

ISSP Activity Report 20145

quadrupole ordered state has a nearly H-independent transition temperature under the magnetic field below 9 T, whichbecomes anisotropic in the higher field [1, 5].
We report the discovery of a field-tuned quantum criticality based solely on the quadrupolar (orbital) degrees
of freedom in PrV2Al20 through the magneto-transportmeasurements up to 35 T by using the high DC magnetic
field facilities at the National High Magnetic Field Laboratory [6].
Our study on PrV2Al20 reveals the field-induced quadrupolar quantum criticality at the critical field Hc = 11 T
applied along the [111] direction. Near Hc required tosuppress the quadrupolar state, we found a marked enhancement of the resistivity ρ(H, T) (Fig. 1 (a)), concomitant
non-Fermi liquid (NFL) behavior following ρ(T ) ~ T n withn < 0.5 in the vicinity of critical field (Fig. 1 (b)), and adivergent quasiparticle effective mass as a function of themagnetic field toward critical field of 11 T (Fig. 1 (c)). We
also observed the Shubnikov-de Haas oscillation above
Hc, indicating an effective mass enhancement up to m*/m0~ 10. These reveal the field induced quadrupolar quantum
criticality where the competition between the nonmagnetic
Kondo effect and the intersite quadrupolar coupling leads topronounced NFL behaviors in an extensive region of T and H
around the quantum critical point.
References[1] A. Sakai and S. Nakatsuji, J. Phys. Soc. Jpn. 80, 063701 (2011).
[2] A. Sakai, K. Kuga, and S. Nakatsuji, J. Phys. Soc. Jpn. 81, 083702(2012).
[3] K. Matsubayashi, T. Tanaka, A. Sakai, S. Nakatsuji, Y. Kubo, andY. Uwatoko, Phys. Rev. Lett. 109, 187004 (2012).
[4] M. Tsujimoto, Y, Matsumoto, T. Tomita, A. Sakai, and S. Nakatsuji,
Phys. Rev. Lett. 113, 267001 (2014).
[5] Y. Shimura, Y. Ohta, T. Sakakibara, A. Sakai and S. Nakatsuji,
J. Phys. Soc. Jpn. 82, 043705 (2013).
[6] Y. Shimura, M. Tsujimoto, B. Zeng, L. Balicas, A. Sakai, and
S. Nakatsuji, to be published in Phys. Rev. B (2015).
Authors
Y. Shimura, M. Tsujimoto, B. Zenga, L. Balicasa, A. Sakaib, and
S. NakatsujiaNational High Magnetic Field Laboratory, Florida State Universityb
I. Physikalisches Institut, Georg-August-Universitat

Novel Superconductivity Mediatedby Quantum Orbital Fluctuations

Fig. 1. (A) Schematic image of a quantum critical point that is realized
by the suppression of magnetic ordering. There is a quantum phasetransition from a magnetic (spin-ordered) state to a paramagnetic(disordered) state at the magnetic quantum critical point (QCP).
Unconventional superconductivity mediated by spin fluctuations has
been found at the vicinity of the quantum critical point. (B) Image of aquantum critical point realized by the suppression of orbital ordering(Spins in Fig. 1 (A) are changed to orbitals). It is a significant subject
to reveal the physical properties in the vicinity of the orbital quantum
critical point.

orderings due to orbital fluctuations of the f electrons or not(Fig. 1(B)). In order to study this, the material with purely
orbital degrees of freedom is required. Besides, the material
should be clean enough and the hybridization should belarge. However, there has been no prototypical system thatsatisfies all these requirements.
On the other hand, recent studies have revealed that
PrT2Al20(T = Ti, V) are the ideal systems to study thequantum criticality arising from orbital degrees of freedom[1]. Both systems have the nonmagnetic cubic Γ3 crystal
electric field doublet. In addition, the hybridization is strong
as is evident in many physical properties [1-3]. Significantly, both exhibit heavy fermion superconductivity inside
the multipole ordered phases (Fig. 2) [2-4]. In particular, inthe case of PrV2Al20, the effective mass is highly enhanced(m*/m0 ~ 140) even at ambient pressure, revealing evenstronger hybridization in PrV2Al20 than in PrTi2Al20 [4].
Furthermore, the superconductivity emerges from a novel
metallic state realized due to the strong fluctuations of thenon-magnetic orbital degrees of freedom. This observation
indicates the first realization of the novel superconductivity
arising from the orbital fluctuations of the f electrons atambient pressure.
The discovery of the new mechanism for the formation of
Cooper pairs may open the new research field of the materialscience based on orbital degrees of freedom, and may lead toanother breakthrough in the superconductivity research.

Nakatsuji Group
Superconductivity is a quantum macroscopic phenomenon where the electrons in solids form “Cooper pairs” at
low temperatures, leading to a zero-resistance state. Thishas been studied extensively for basic science as well as
for industrial applications. In the case of conventional
superconductors, lattice vibrations (phonons) provide the“glue” among the electrons to form the Cooper pairs. On
the other hand, in the case of magnetic materials such as thecuprate high-temperature superconductors, recent studies
have revealed that fluctuations of the microscopic magnets
inherent in electrons, namely “spin,” causes the formation of
the Cooper pairs.
Such superconductivity has been studied extensively
especially in the 4f based intermetallics, where a lot of heavy
fermion superconductors have been found in the vicinity ofmagnetic QCPs (Fig. 1(A)). Here, an interesting question iswhether novel superconductivity arises at a QCP of orbital

6

ISSP Activity Report 2014

Fig. 2. The resistivity vs. temperature of PrV2Al20 and PrTi2Al20. TO
and Tc represents the multipolar ordering and superconductivity transitions respectively. Tc is 0.05 K for V system and 0.2 K for Ti system.
The inset shows the crystal structure of PrV2Al20.

References[1] A. Sakai, and S. Nakatsuji, J. Phys. Soc. Jpn. 80, 063701 (2011).
[2] A. Sakai, K. Kuga, and S. Nakatsuji, J. Phys. Soc. Jpn. 81, 083702(2012).
[3] K. Matsubayashi, T. Tanaka, A. Sakai, S. Nakatsuji, Y. Kubo, and Y.
Uwatoko, Phys. Rev. Lett. 109, 187004 (2012).
[4] M. Tsujimoto, Y. Matsumoto, T. Tomita, A. Sakai, and S. Nakatsuji,
Phys. Rev. Lett. 113, 267001 (2014).
Authors
M. Tsujimoto, Y. Matsumoto, and S. Nakatsuji

Field Evolution of Quantum Criticaland Heavy Fermi-liquid Components
in the Magnetization of the Mixed
Valence Compound β-YbAlB4
Nakatsuji, Sakakibara, Tokunaga,
and Kindo Group
Formation of novel quantum phases in the vicinity of aquantum critical point (QCP) has been studied extensively incondensed matter physics for a past few decades. In particular, in the heavy fermion intermetallic systems, a number ofprototypical examples of novel phenomena, such as unconventional superconductivity and non-Fermi liquid (NFL)behavior, have been discovered in the vicinity of a magnetic
QCP where the magnetic ordering temperature is suppressedto zero.
So far, these studies of quantum criticality (QC) have

Fig. 1. T-B phase diagram of β-YbAlB4 for the field applied along thec axis. The valence fluctuation scale is shown as pink, red and dark
yellow arrows (from top to bottom) at T ~ 200 - 300 K which corresponds to T scale obtained by the X-ray adsorption measurements [7],the coherence peak in ρabm [1] and the peak temperautre in χab at B =0.1, 7.0 T, respectively. The light and dark green arrows indicate theanomalies in the T derivative of the in-plane resistivity dρab /dT at T ~50 K [8] and the peak in the Hall coefficient RH at ~ 40 K [6], respectively. These temperature scales correspond to the effective Kondo
lattice temperature for the low T HF behavior. Green filled circles
correspond to the peaks in -dχ/dT, which separates the QC and FL
regions. Green open circles correspond to the peak temperature scale T*in Δ(-dχ/dT) obtained after subtracting QC components, which sets theonset of the heavy fermion state. Black open circles correspond to TFL
determined by ρab [1]. Filled and open diamonds correspond to superconducting phase boundary determined by the SQUID ac susceptibility
measurements [9] and the resistivity measurements [2], respectively.
Inside the red broken line, the QC scaling is observed. The vertical blue
broken line at B ~ 5 T indicates the crossover field above which the HF
state is suppressed.

Fig. 2. (a) Magnetization curves of β- and α-YbAlB4 at T = 1.3 and 1.8
K, respectively. (b) dM/dB obtained from the data shown in (a) (the leftaxis) and the electronic specific heat coefficient γ estimated from theelectric specific heat at T = 0.4 K [3] (the right axis).

been restricted mostly to the Kondo lattice systems withinteger valence. On the other hand, the first Yb-based
heavy fermion superconductor β-YbAlB4 provides a uniqueexample of QC in the strongly mixed valence states [1-4].
Furthermore, the QC cannot be described by the standard
theory for the spin-density-wave instability. The divergent
magnetic susceptibility along the c axis exhibits T/B scaling
in the wide temperature (T) and magnetic field (B) region
spanning 3 ~ 4 orders of magnitude. This indicates that the
QCP is located just at the zero magnetic field within theexperimental resolution of ~ 0.2 mT under ambient pressure[3]. The QC emerging without tuning any control parametersuggests the formation of an anomalous metallic phase.
Here, we discuss the magnetization (M) in β-YbAlB4
in the T range from 0.02 K to 320 K spanning four ordersof magnitude to see how it evolves with magnetic field in
detail, providing a T-B phase diagram to summarize thevarious T and B scales for β-YbAlB4 (Fig. 1) [5]. First ofall, we examined the possibility of other scaling such as
T/(B-Bc)δ scaling with Bc ≠ 0 or δ ≠ 1, and confirmed that theT/B scaling reported in our previous work [3] provides thebest quality of the fitting [5].
We further estimated the heavy Fermi-liquid componentof M after subtracting the QC component by using the T/Bscaling. The obtained heavy Fermi-liquid component exhibits
the T and B dependence quite similar to the magnetizationof α-YbAlB4, having a peak in -dM/dT at T* ~ 8 K, which
is suppressed above B* ~ 5 T. Here, α-YbAlB4 is the locally
isostructural polymorph of β-YbAlB4 and is also strongly
mixed valent (Yb+2.73 and Yb+2.75 for α- and β-YbAlB4 at
20 K, respectively) [4]. Our observation indicates that the
HF behavior in α- and β-YbAlB4 becomes suppressed above
B* ~ 5 T corresponding to the small renormalized Kondo
scale. This was also confirmed by the analysis of the fielddependence of the electronic specific heat coefficient of
β-YbAlB4 and the measurements of the magnetization curve
up to ~ 50 T for both α- and β-YbAlB4. This suppression of
the HF behavior may be related to the recent observation of
the field induced anisotropic NFL behavior in α-YbAlB4. In
β-YbAlB4, on the other hand, we found no sign of such field
induced NFL behavior.
While the effective g-factor estimated from the Zeeman
coupling relation kBT* = gμBB* and T/B scaling suggests theeffective moment of ~ 2 μB for β-YbAlB4, M at the suppression field B* only reaches a considerably smaller value

ISSP Activity Report 20147

~ 0.2 μB. This indicates that only a part of the f moments
participates in the zero-field QC or HF behavior, as alsosuggested by the recent Hall effect measurements [6]. The
multiple bands and their topological feature should play animportant role in the formation of the low temperature heavy
fermion state and quantum criticality in the intermediate
valence state.
References[1] S. Nakatsuji, K. Kuga, Y. Machida, T. Tayama, T. Sakakibara,
Y. Karaki, H. Ishimoto, S. Yonezawa, Y. Maeno, E. Pearson, G. G.
Lonzarich, L. Balicas, H. Lee, and Z. Fisk, Nature Physics 4, 603(2008).
[2] K. Kuga, Y. Karaki, Y. Matsumoto, Y. Machida, and S. Nakatsuji,
Physical Review Letters 101, 137004 (2008).
[3] Y. Matsumoto, S. Nakatsuji, K. Kuga, Y. Karaki, N. Horie,
Y. Shimura, T. Sakakibara, A. H. Nevidomskyy, and Piers Coleman,
Science 331, 316 (2011).
[4] M. Okawa, M. Matsunami, K. Ishizaka, R. Eguchi, M. Taguchi,
A. Chainani, Y. Takata, M. Yabashi, K. Tamasaku, Y. Nishino,
T. Ishikawa, K. Kuga, N. Horie, S. Nakatsuji, and S. Shin, PhysicalReview Letters 104, 247201 (2010).
[5] Y. Matsumoto, K. Kuga, Y. Karaki, Y. Shimura, T. Sakakibara,
M. Tokunaga, K. Kindo, and S. Nakatsuji, Journal of the PhysicalSociety of Japan 84, 024710 (2015).
[6] E. C. T. O’Farrell, Y. Matsumoto, and S. Nakatsuji, Physical Review
Letters 109, 176405 (2012).
[7] Y. H. Matsuda, T. Nakamura, K. Kuga, S. Nakatsuji, S. Michimura,
T. Inami, N. Kawamura, and M. Mizumaki, Journal of the Korean
Physical Society 62, 1778 (2013).
[8] Y. Matsumoto, K. Kuga, T. Tomita, Y. Karaki, and S. Nakatsuji,
Phys. Rev. B 84, 125126 (2011).
[9] Y. Matsumoto, K. Kuga, Y. Karaki, T. Tomita, and S. Nakatsuji,
Phys. Status Solidi B 247, 720 (2010).
Authors
Y. Matsumoto, K. Kuga, Y. Karakia, Y. Shimura, T. Sakakibara,
M. Tokunaga, K. Kindo, and S. Nakatsuji,aUniversity of the Ryukyus

Magnetic Anomaly due to the
Non-Coplanar Antiferromagnetic
Spin Structure in NiS2
Nakatsuji Group
Non-coplanar spin arrangements in frustrated magnets
have attracted great interest because the associated spinchirality may induce exotic phenomena such as multiferroicity, topological Hall transport, and chiral spin liquidstates. While most non-coplanar magnets are characterized
by their ferromagnetic (FM) component, a purely antiferromagnetic (AF) all-in/all-out (AIAO) structure has recently

Fig. 1. (a) NAF structure of NiS2. Arrows indicate the Ni2+ magnetic
moments [5]. (b) Temperature dependence of the magnetic susceptibility χ(T) = M(T)/H in the magnetic field of 0.1 T.

8

ISSP Activity Report 2014

Fig. 2. Temperature dependence of Δ χ(T) = {χ(T)−χ(39 K)}/χ(39 K)×100% (the change in χ(T) from the one at 39 K > TN1)
obtained on heating in μ0H = 0.1 T // [100] after the field cooling (a)down to 31 K and (b) down to 2 K with various magnetic fields for the
FC procedure μ0HFC = -0.1‐5 T.

been discovered in several 5d pyrochlore oxide. While thismagnetic structure has zero net magnetic moment owing
to the cancellation of the moments on the four vertexesof a tetrahedron, it has two types of AF variant, which areconnected by the time-reversal operation, and permits a
multi-domain state as in the case of FM materials [1]. In thissystem, it has been theoretically proposed that the magnetic
domain wall (DW) induces a net uniform magnetization andhosts a gapless interface state with Fermi arcs [2]. Experimentally, the unconventional weak ferromagnetic (WF)
moment and the anomalous magnetoconductivity have been
observed in the AIAO-phase of Eu2Ir2O7 and Nd2Ir2O7,
respectively [3]. As the domain physics is inherent to the
AIAO structure, similarly interesting physics associatedwith the DW should generally emerge in other materials
that host the non-coplanar AF spin structure. However, todate, there have been almost no reports on studies of domain
phenomena related to the non-coplanar AF spin structure.
The antiferromagnet NiS2 has the pyrite structure. The
magnetic ion Ni2+ forms an fcc lattice, one of geometricalfrustrated lattices. Neutron diffraction measurements haverevealed that NiS2 exhibits a non-coplanar AF spin structure with four spin sublattices (NAF structure), similarly
to the AIAO structure [Fig. 1(a)], in the temperature region
between TN1 = 38 K and TN2 = 30 K, and the WF-phase
below TN2 [4]. We have carried out detailed magnetization
measurements using high-quality single crystals of NiS2 toreveal magnetic properties associated with the NAF structure[5].
A small but distinct hysteresis in the temperaturedependence of the susceptibility χ(T) was observed in the
NAF-phase [Fig. 1(b)]. While this type of hysteresis is notobserved in a collinear antiferromagnet, a similar behavior
has been reported for Eu2Ir2O7, suggesting that the behavior
is inherent in the non-coplanar AF spin structure. To reveal
the origin of the hysteresis, we performed the χ(T) measurement with the two field cooling (FC) processes, namely, (i)cooling down to 31 K in the NAF-phase, and (ii) cooling
down to 2 K in the WF-phase under various FC magnetic
fields μ0HFC between − 0.1 and 5 T. After the FC sequences,
we changed the field at the lowest temperatures (31 or 2 K),
and measured χ(T) in μ0H = 0.1 T.
The results in Fig. 2(a) obtained after the FC process(i), which corresponds to a direct magnetic field control of
the NAF structure, show that χ(T) monotonically increases
with increasing μ0HFC and saturates above 1 T. On the other
hand, the results in Fig. 2(b) obtained after the FC process(ii), namely, the indirect magnetic field control of the NAF
structure by aligning the WF moment in WF-phase, show theunusual μ0HFC dependence of χ(T). While χ(T) monotonically increases with increasing μ0HFC under μ0HFC ≦ 0.1 T,χ(T) under 0.1 T < μ0HFC ≦ 3 T decreases with increasing
μ0HFC, and χ(T) under μ0HFC = 3 and 5 T exhibits almost thesame behavior as the result with μ0HFC = 0 T. These observations indicate that the NAF structure can be controlled
by using the WF-phase. In addition, the anomalous μ0HFC
dependence of the magnetic hysteresis found in the
NAF-phase strongly suggests that the small FM moment in
the NAF-phase comes from the DWs.
References[1] T.-h. Arima, J. Phys. Soc. Jpn. 82, 013705 (2013).
[2] Y. Yamaji and M. Imada, Phys. Rev. X 4, 021035 (2014).
[3] J. J. Ishikawa, E. C. T. O’ Farrell, and S. Nakatsuji, Phys. Rev. B
85, 245109 (2012); K. Ueda et al., Phys. Rev. B 89, 075127 (2014).
[4] K. Kikuchi et al., J. Phys. Soc. Jpn. 45, 444 (1978).
[5] T. Higo and S. Nakatsuji, J. Phys. Soc. Jpn. 84, 053702 (2015).
Authors
T. Higo and S Nakatsuji

Continuous Mott Transitionin the Hubbard Model on the
1/5-Depleted Square Lattice
K. Ueda Group
Metal-insulator (MI) transition is a central problem of
the physics of strongly correlated electron systems. In thesimplest case of the square lattice Hubbard model, it has
been established that the ground state at half-filling is always
a Mott insulating state with the antiferromagnetic long rangeorder. Under the assumption of paramagnetic phase it is
widely believed that the transition from the paramagnetic
metallic phase to the paramagnetic insulating phase takes
place through a discontinuous transition. One can ask thequestion how general is the first order nature of various MItransitions.
In particular, nature of MI transitions in non-Bravais
lattices seems to be non-trivial and interesting. We study the
MI transition in the one-fifth depleted square lattice Hubbard
model. The unit cell contains four lattice sites which form asquare. The square plaquettes are connected by dimer bonds.
The 1/5-depleted square lattice does not have any effect of

Fig. 1. Phase diagram of the Hubbard model on the 1/5-depleted squarelattice. On the dimer side where the intra-dimer hopping, t2, is bigger
than the intra-plaquette hopping, t1, the MI transition from the semimetallic phase to the dimer-insulating one is a continuous transition.

the geometrical frustration. However, the Heisenberg modelon this lattice shows quantum phase transitions from thedimer singlet phase to the antiferromagnetic ordered phaseand then onto the plaquette singlet phase. Since the Heisenberg model is an effective Hamiltonian of the Hubbard modelin the strong correlation limit, it is an interesting problem tolook at the nature of MI transition of the Hubbard model.
In the present study we investigate the MI transitionof the Hubbard model on the 1/5-depleted square latticein the paramagnetic phase by using the cellular dynamicalmean field theory. When the intra-plaquette hopping, t1, issmaller than the intra-dimer hopping, t2, the MI transition iscontinuous. This time we use the eight-site cluster to checkthe finite-size effect of the cellular DMFT. This continuous
MI transition is characterized by the Lifshitz transition whichis associated with the appearance or annihilation of the pairof electron and hole pockets in different bands. New featurefound in this study is that the Lifshitz transition is triggered
not only by changing a one-body parameter, t1/t2, but also bychanging the magnitude of the Coulomb interaction, U. One
can see these features clearly by studying the self-energies
corresponding to the dimer bonds and the plaquette bonds.
Reference[1] Y. Yanagi and K. Ueda: Phys. Rev. B90, 085113 (2014).
Authors
Y. Yanagia, and K. UedaaTokyo University of Science

Orbital Angular Momentum andSpectral Flow in Two Dimensional
Chiral Superfluids
Oshikawa Group
Fermions can exhibit superfluidity/superconductivity byforming Cooper pairs, which undergo Bose-Einstein Condensation (BEC). In the most conventional metallic superconductors, the Cooper pair is formed with zero relative angularmomentum (“s-wave pairing”). However, the Cooper paircan be also formed with a non-vanishing relative angularmomentum. When the angular momentum of each Cooper
pair is aligned, the superfluid as a whole breaks the timereversal symmetry and is called “chiral superfluid”. One of
the superfluid phases of 3He called “superfluid A-phase”,
indeed is such a chiral superfluid, in which each Cooper pair
has a relative angular momentum 1 (“p+ip-wave pairing”).
There is also much evidence that Sr2RuO4 is a chiral p+ipwave superconductor. We can also consider more generalchiral superfluids/superconductors, in which each Cooper
pair carries the angular momentum ν (ν=1 for p+ip, ν=2 for
d+id, etc.).
We can then ask a simple question: what is the total
orbital angular momentum of the chiral superfluid which
consists of N fermions? On one hand, the answer seems
obvious: since there would be N/2 Cooper pairs, it must beνN/2. On the other hand, since the pairing energy Δ is usuallymuch smaller than the Fermi energy EF in Bardeen-CooperSchrieffer (BCS) type superfluids, we may also think that
only the fermions near the Fermi surface are affected by
the pairing. In this picture, we rather expect the total orbital

ISSP Activity Report 20149

Quadrupole Orders in
Heavy Fermion Systems
Tsunetsugu Group

Fig. 1. The total orbital angular momentum of a d+id-wave (ν=2)
chiral superfluid and spectral flow. (a) The energy spectrum in the
weak-pairing (BCS) phase, as a function of the angular momentum l.
Two gapless edge modes can be seen within the pairing gap. (b) The
contribution ηl in each sector with angular momentum l to the quantum
number Q, in the weak-pairing (BCS) phase. Non-vanishing contributions are present in the region between the “Fermi angular momenta”
where the gapless edge modes cross the zero energy. They make Q
non-vanishing, suppressing the total orbital angular momentum fromthe “ideal” value νN/2. (c) The energy spectrum at a fixed angularmomentum l, which lies between the Fermi angular momenta inside
the weak-pairing (BCS) phase, as a function of the chemical potential
μ. When μ is changed from negative (strong-pairing, BEC phase) topositive (weak-pairing, BCS phase), one of the energy eigenvalues
changes sign, as required from the structure of the edge modes. This
induces the non-vanishing contribution ηl to Q discussed in (b) above,in the weak-pairing (BCS) phase.

angular momentum is suppressed as (Δ/EF)ανN/2, where α>0.
There have been many conflicting papers published overthe last several decades on this question, but it still remains
controversial.
In order to clarify the long-standing puzzle, we studied
chiral superfluids in a two-dimensional circular potential(disk), within the standard Bogoliubov-de Gennes framework
but without further approximations or assumptions. The
Bogoliubov-de Gennes Hamiltonian has anomalous pairingterms and thus does not conserve particle number N nor the
total orbital angular momentum L. Nevertheless, as Volovik
pointed out, the combination Q = L – νN/2 is still conserved
and turns out to be a quite useful quantum number. For eachvalue of ν, there are two phases of chiral superfluid: strongpairing (BEC) and weak-pairing (BCS) phases, separated bya quantum phase transition. Since L = νN/2 (and thus Q = 0)in the strong pairing limit, and no gap closing occurs within
the strong-pairing (BEC) phase, the conservation of thequantum number Q immediately implies that the L = ν N/2
holds in the entire strong-pairing (BEC) phase. This is what
was naturally expected; the real question is what happens in
the weak-pairing (BCS) phase.
We found that, in a p+ip -wave (ν=1) chiral superfluidin the weak-pairing (BCS) phase, L = νN/2 holds exactly
for a sufficiently large system. In contrast, in d+id, f+if, etc.
(ν ≧ 2) chiral superfluids in the weak-pairing (BCS) phase,
L is strongly suppressed and is at most of O(Δ/EF), implying
Cooper-pair breaking near the edge. This surprising difference is understood in terms of the spectral flow and thequantum number Q.

Heavy fermion compounds PrT2Zn20 (T=Ir, Rh) exhibit
an unidentified phase transition at very low temperature oforder 0.1K, and this is supposed to be an antiferro-quadrupole ordering. Rare-earth ions Pr3+ on the diamond sublattice have the electron configuration (4f)2 and this system
is one of the rare cases that the local ionic ground state is a
non-Kramers doublet, the degeneracy of which is not related
to time-reversal symmetry. This log 2 entropy of Pr ion isreleased due to inter-site interactions and this is expected
to lead to an antiferro order of electric quadrupoles experimentally observed below the transition temperature. First
we had investigated this problem by a phenomenologicalapproach [1]. Only two components Q=(Qu,Qv) of quadrupole moments are active within the ground-state doublet,
and we constructed their Landau free energy based onsymmetry analysis. Bond direction to nearest-neighbor sites
imposes that only the isotropic coupling Qi・Qj is allowed.
These seem to imply that the effective model is the antiferro
plane rotor model that is known to exhibit a phase transition belonging to the O(2) universality class. However, cubic
symmetry around the Pr site is transferred to Z3 symmetry
in the internal two-dimensional Q space, and a special
feature in our Landau free energy is the presence of a Z3
anisotropy term in the Q space. This anisotropy distinguishes
the quadrupole physics from a seemingly similar spin
system, in which the time-reversal symmetry prohibits the Z3
anisotropy.
We used a mean-field approach to the Landau theory as
well as to a microscopic model for Pr ions and found a phasetransition to an antiferro ordered phase. The order parameter is the staggered Q component, but unexpectedly it does
not point along a soft direction of the Z3 anisotropy but isrotated by 90 degrees. The Z3 anisotropy induces a secondary
order parameter, and it is the uniform Q component pointing
to a hard direction [1]. An important discovery is that thesusceptibility of the secondary order parameter diverges
faster than that for the primary order parameter upon
approaching the transition temperature in the ordered phase

Reference[1] Y. Tada, W. Nie, and M. Oshikawa, Phys. Rev. Lett. 114, 195301(2015).
Authors
Y. Tada, W. Niea, and M. OshikawaaTsinghua University
Fig. 1. Monte-Carlo result of the pair distribution of nearest-neighbororder parameters, Q(r) = (cos θ(r), sin θ(r)) in the ordered phase. Index
pair (1,1’), etc., represents the directions of the local order parametersin the two-sublattice shown in Fig. 2. Six peaks correspond to the six
domains in the ordered phase, the multiplicity of which comes from Z3
symmetry in the Q space and Z2 symmetry of exchanging sublattices.

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ISSP Activity Report 2014

Fig. 2. Schematic picture of order parameters. Bold black lines show
soft directions of the Z3 anisotropy. The primary order parameter is
QA– QB, while the secondary order parameter is QA + QB. In eachof the six domains, QA points to the corresponding direction n or n’(n=1,2,3) and QB points to its partner direction n’ or n.

[1]. This may explain the observed singularity in the ultrasound experiments.
We continued our study and investigated the effects ofthermal fluctuations on this transition. We have performed
classical Monte-Carlo simulations for our effective modeland compared the results with those for the antiferromagnetic 3-state Potts model on bipartite lattices. Finite-size
scaling analysis shows that the transition belongs to the O(2)universality class in three dimensions, which is consistent
with simulations for the 3-state Potts model. The differenceis about the spatial configuration of order parameter. The
3-state Potts antiferromagnet has a thermodynamic degeneracy in the ground state, and several exotic states have been
proposed for the ordered phase. In our results, the local orderparameters do not have esoteric macroscopic configurations
aside from usual thermal fluctuations. The calculated pair
distribution function of local Q direction between nearestneighbor sites clearly demonstrates that the spatial configuration agrees with the mean-field result. Our result disproves
most of the proposals for the Potts model, but the so-called
permutationally symmetric sublattice state may be consistentafter coarse graining. Understanding the critical behavior of
the secondary order parameter is an interesting open issue
and needs further investigation.
Reference[1] K. Hattori and H. Tsunetsugu, J. Phys. Soc. Jpn. 83, 034709 (2014).

the effective screening medium (ESM) [1] for applying thebias potential to the system and the potentiostat molecular
dynamics scheme [2] for controlling the bias, with which to
study the electrode-electrolyte interface problems. On theother hand, methods for the former subject (i), or obtaining
reliable PES, has been left unsolved although crucially
important for the present purpose.
Our study in the latter direction began by reformulating
the full configuration interaction (FCI) method, or the exact
diagonalization method, which is formally exact within thechosen basis set but the application is severely restrictedby the combinatorial explosion of the degrees of freedom.
It has been occasionally suggested that the key to reducing
the degrees of freedom is in a construction of a specialized
molecular orbital (MO) set that is non-orthonormal andspatially localized. With this in mind, an efficient and robustalgorithm was developed [3, 4], wherein the many-bodyelectronic wavefuntion (WF) is described using a canonicaltensor format and the MOs are variationally determined so
as to achieve the most compact representation of WF. In
the most recent version [4], the resulting WF has a formof a linear combination of the antisymmetrized geminal
powers (AGPs), where AGP is equivalent to the HartreeFock-Bogoliubov (HFB) state with a fixed particle number.
This means that the computational scheme developed herein
describes the interacting geminals while the conventional
FCI describes the interacting unpaired electrons. The totalenergy formulas were derived originally for this purpose
but many of them are found equivalent to those used in the
nuclear physics in a different context.
When the new scheme, called extended symmetric tensor
decomposition (ESTD), is applied to, for example, the watermolecule that is a benchmark ten-electron system, the WF isaccurately described only with ten terms for the decomposition series, i.e., ten for the canonical rank (K) (Fig. 1). The
computational time to obtain the total energy within μHartree
error scales as O(K2M5), where M is the number of MOs
that is proportional to the number of electrons, of which thescaling is superior to most of the existing computational
schemes. This remarkable result indicates a promise of thisscheme in improving the accuracy of PES within reasonable
computational time. This scheme will allow further improvements: when a more elaborate tensor format is used insteadof the canonical one, one would achieve further accuracy

Author
H. Tsunetsugu

Accurate Prediction ofChemical Reaction Systems
Sugino GroupThe functional material research, one of the priority
subjects of ISSP, investigates the link between (a) various
functions of a heterogeneous system and (b) the basic
properties of electrons and nuclei. The first-principles
simulation can contribute to the research by, for example, (i)obtaining the potential energy surface (PES) for the nucleiand (ii) simulating the non-equilibrium chemical reaction
dynamics occurring thereon. Sugino group has been working
on the latter subject (ii) by developing algorithms such as

Fig. 1. A version of the extended symmetric tensor decomposition(ESTD) scheme applied to the water molecule. The total energy of
the water referred to the full configuration interaction (FCI) is plottedagainst the canonical rank (K). The total energy converges exponentially to the FCI indicating remarkable efficiency of the computational
scheme, which is well beyond most of the conventional schemes.

ISSP Activity Report 201411

taking smaller rank; when a mean-field approximation is
combined to ESTD to simplify the long ranged correlation that will be weak in some chemical reaction systems,
one would achieve further efficiency. The ESTD scheme isgeneral and can be adapted to such modifications. We thus
expect ESTD will finally overcome known inaccuracy of thedensity functional PES and will prove a powerful tool not
only to the chemical reaction systems but also many othersystems.
References[1] M. Otani and O. Sugino, Phys. Rev. B 73, 115407 (2006).
[2] N. Bonnet, T. Morishita, O. Sugino, and M. Otani, Phys. Rev. Lett.
109, 266101 (2012).
[3] W. Uemura and O. Sugino, Phys. Rev. Lett. 109, 253001 (2012).
[4] W. Uemura, S. Kasamatsu, and O. Sugino, arXiv:1504.06250v1(2015); to be published in Phys. Rev. A.
Authors
W. Uemura, S. Kasamatsu, O. Sugino

Effects of Coulomb Interaction on
Photon-Assisted Current Noises
Kato Group
Photon-assisted transport through mesoscopic conductors has attracted much attention because the external fields
open up additional transport channels via photon absorption
and emission. It is known that nonperturbative effects ofthe time-dependent fields significantly modify the quantum
nature of transport processes. In recent years, many studies
have revealed that current noises provide significant information about the microscopic processes involved in photonassisted transport. Photon-assisted current noise has beenmeasured in various systems such as diffusive metals, diffusive normal metal-superconductor junctions, quantum point
contacts, and tunnel junctions. Recently, the time-resolved
current noise has been measured to evaluate the quantum
purity of electrons emitted from on-demand electron sources.
The coherent and spectroscopic nature of the photon-assisted
current noise of noninteracting electrons has been studied
theoretically based on the scattering approach or the Green's
function approach [1,2]. These approaches are, however, oflimited use to describe the effects of the Coulomb interaction.
We have studied photon-assisted transport in a singlelevel quantum dot coupled to two electrodes under a periodically oscillating field [3]. A schematic picture of our modelis shown in the inset of Fig.1 (a). Hybridization between a
dot and a lead is set to be unity (ΔL = ΔR = 1), and the energy
level of the quantum dot is denoted with ε(t) = εd + ε1sin(Ωt).
We focus on the particle symmetric case (εd = −U/2) for
simplicity. Photon-assisted current noise in the presenceof the Coulomb interaction has been described based on agauge-invariant formulation of time-dependent transport. The
current noises are expressed in this description by two terms,
i.e., a bare part and a vertex correction. The latter contribution
appears only in the presence of the Coulomb interaction, andreflects internal dynamics of the systems. We have derived
the vertex corrections within the self-consistent HartreeFock approximation in terms the Floquet-Green's functions
and have examined the effects of the Coulomb interaction on
the photon-assisted current noise. Within the Hartree-Fock

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ISSP Activity Report 2014

Fig. 1 (a) The photon-assisted zero-bias noise (SLL) and the equilibrium
thermal noise evaluated at the corresponding Teff are displayed as afunction of ε1. Parameters are as follows: ΔL = ΔR = 1, εd = −U/2 = −1,
kBT = 0.05, V = 0, and Ω = 5. The left inset: a schematic picture of thepresent model. The right inset: the effective temperature as a functionof ε1. (b) The vertex corrections to the current noise for antiparallel
spins (SLσ L-σ) are displayed. Parameters are the same as (a).

approximation, the vertex correction describes dynamical
screening effect induced by the Coulomb interaction.
In Fig. 1(a), we show a current noise (SLL) for zerosource-drain voltage bias. From Fig. 1(a), we find that as
the amplitude of the oscillating field increases, the zero-bias
current noise rapidly increases, and oscillates as a function of
ε1 for large amplitude of the external field. This behavior isunderstood by considering an effective temperature definedby Teff = (SLL)V=0 / 4kBG (the inset of Fig.1 (a)), where G isa linear conductance. We note that this definition equals theoriginal temperature for ε1 = 0 by the dissipation-fluctuation
relation, and provides a natural extension of the temperature toward nonequilibrium states. The thermal noise (Seq)estimated from the effective temperature (shown in Fig. 1(a))
qualitatively reproduces the behavior of the zero-bias current
noise.
In Fig.1 (b), we show a current noise for antiparallel
spins SLσ L-σ as a function of the frequency. This noise
always vanishes in noninteracting models, and equals thevertex correction in the presence of the Coulomb interaction. SLσ L-σ is strongly frequency-dependent, and has structures at integral multiples of the driving frequency Ω in thepresence of the external oscillating field. As the amplitude of
the oscillating external field increases, the vertex corrections
are suppressed on the whole. This suppression of the vertex
corrections is understood using the effective temperature as
follows. As the amplitude of the oscillating external field
increases, the effective temperature rises for ε1 < 12 as shownin the inset of Fig. 1(a). The rise of the effective temperatureleads to suppression of the dynamical screening effect, andweakens the current correlation with different spins. These
effects are expected to be general in interacting electron
systems. We note that the spin-dependent current noise
SLσ L-σ is appropriate for study of internal dynamics of interacting systems, and can in principle be measured using a spinfilter.
Our result shows that the effect of Coulomb interaction
is modified by external oscillating fields via nonequilibrium distribution functions. Our study will offer a useful
viewpoint for understanding photon-assisted transport ofother phenomena such as the Coulomb blockade and the
Kondo effect.
References[1] Ya. M. Blanter and M. Büttiker, Phys. Rep. 336, 1 (2000).
[2] G. H. Ding and B. Dong, Phys. Rev. B 87, 235303 (2013).
[3] T. J. Suzuki and T. Kato, Phys. Rev. B 91, 165302 (2015).
Authors
T. J. Suzuki and T. Kato

Spin Transport and Relaxation Mechanism
in a Disordered Organic Film
Otani Group
Organic semiconductors (OSCs) consist of relatively
light elements such as carbon, hydrogen, and sulfur. Therefore, their spin-orbit (SO) interaction is expected to be weak.
OSCs are thus expected to have long-distance spin transport
since the spin relaxation is mainly caused by the SO interaction. In most of the OSCs, however, the electron conduction
is dominated by hopping transport in the strongly disorderedstructure. Thus, the spin transport and relaxation mechanism is not well understood compared with the conventional
metallic materials where the band-like transport is dominant.
Here we report our systematic studies on the spin transport and relaxation mechanism in an OSC PEDOT:PSS
by means of spin pumping, charge transport, and electron
paramagnetic resonance (EPR) experiments. The spin
pumping experiment enables us to estimate the spin diffusion
length (SDL), and the other two experiments to determine
the spin diffusion constant (DS) and the spin lifetime (τS),
respectively. The OSC used in this study is the conducting
polymer PEDOT:PSS in which the conjugated PEDOT
molecule is doped with PSS. The film consists of core-shellparticles in which a PEDOT-rich core is covered with aninsulating PSS shell: the electron transport is dominated byhopping conduction between the PEDOT-rich cores.
Figure 1(a) shows the device structure used in this spin
pumping experiment. The device comprises a trilayer offerromagnetic permalloy (Py), PEDOT:PSS, and platinum(Pt). These layers respectively act as spin injector, transport,

Fig. 1. (a)Schematic of the device structure used for the spin pumping
experiment. The applied magnetic field is rotated in the basal plane. (b)Magnetic field dependence of the ISHE voltage signal for ø = 0˚, 90˚
and 180˚. In this figure, only the symmetric voltage component on the
FMR field is shown.

Fig. 2. Expected spin transport mechanism in the PEDOT:PSS layer.
ξ, Lm, and λSPE denote the localization length, hopping length, andSDL of PEDOT:PSS, respectively. The spins do not flip during hopping
conduction, but mostly flip while trapped in the PEDOT-rich cores.

and detector layers. In this experiment, the pure spin current
accompanied by no net charge current is induced in theadjacent PEDOT:PSS layer by the interfacial exchange interaction during the ferromagnetic resonance (FMR) excitation.
The injected pure spin current through the PEDOT:PSS isabsorbed by the Pt layer, and then converted to the electricfield via the inverse spin Hall (ISH) effect of the Pt layer.
Figure 1(b) shows the magnetic field dependence of voltage
signal at the Pt layer for ø = 0˚, 90˚ and 180˚. As can be seenin the figure, a clear voltage peak is observed at the FMR
field. The voltage signal changes its sign when the magnetic
field direction is inverted, and vanishes at ø = 90˚. Thisbehavior is consistent with the ISH voltage signal (VISH)
given by VISH ∝ JS × σ where JS is the spin current and σ
is the spin polarization vector. From the PEDOT:PSS thickness dependence of VISH, we have determined the SDL of
PEDOT:PSS layer as 140 ± 20 nm. By using the diffusion
constant obtained from the charge transport experiment,
we can estimate the spin lifetime (τ St ) as 28 ± 20 ns. To
confirm this result, we have performed an EPR experimentof PEDOT:PSS which is an alternative method to determine
the spin lifetime. The obtained spin lifetime (τ EPRS ) is in therange of 5-100 ns, and this value is reasonably consistent
with τ St .
Now we consider the relationship between two spin
lifetimes obtained by different experiments. In the present
material PEDOT:PSS, the charge transport is dominatedby the hopping conduction. Therefore, the electrons are
first trapped at the PEDOT-rich core, and occasionally hop
to adjacent cores, suggesting τ St is determined by both thetrapping and hopping processes. On the other hand, the EPR
experiment mainly gives the spin lifetime in the trappingstate, i.e., the spin lifetime within the PEDOT-rich cores. The
present study indicates that two spin lifetimes determined by
two different experimental methods are reasonably consistent
with each other. Moreover, we have revealed that the SDL islonger than the average hopping length (Lm) for one hopping
process. These results suggest that most of the spins are notflipped during the hopping process, while the spin relaxation
mainly takes place in the trapping state of the PEDOT-richcores (Fig. 2).
Authors
M. Kimata, D. Nozaki, Y. Niimi, H. Tajimaa, and Y. OtaniaUniversity of Hyogo

ISSP Activity Report 201413

A Low-Dimensional Metallic Stateon Au-Adsorbed Ge(001) Surface
Komori Group
Surface electronic states on bulk semiconductors are
suitable for the study of low-dimensional electronic properties because the metallic state in the bulk band gap can
provide an ideal low-dimensional metal. Moreover, we can
expect to study one-dimensional (1D) surface electronic
properties such as Tomonaga-Lüttinger liquid (TLL) andPeierls instability when the surface atomic structure is highly
anisotropic. As one of the surfaces with a 1D atomic structure, the Au-adsorbed Ge(001) surface has recently attracted
much attention and its electronic and atomic structures havebeen studied in detail using scanning tunneling microscopy/
spectroscopy (STM/STS), and angle-resolved photoemission spectroscopy (ARPES). An interesting STS result of thissystem was that the surface local density of states (LDOS)
depends on the energy E as (E - EF)α with α = 0.5 [1]. This
was attributed to TLL while the metallic surface state has ananisotropic two-dimensional (2D) dispersion in the ARPES
study [2]. We have studied this surface state by using highresolution STS to understand the origins of these interesting
features [3].
Figure 1 shows the results of STM/STS for the
Au-adsorbed Ge(001) surface consisting of the well-known
atomic chain structure. The atomic images largely depend on
the sample bias voltage. The symmetry of the surface structure has been considered to be c(8×2) while a short rangeorder of a 4×8 superstructure can be seen on the surface.
The tunneling spectra always show a dip at EF as in Fig. 1d.
However, by fitting the data to the (E-EF)α dependence, α
is always larger than 0.7 at the ordered 4×8 area while α isclosed to 0.5 at the areas including point defects and domainboundaries of the 4×8 superstructure. Thus, the square-root
behavior is ascribed to the surface disorder.
We have measured differential conductivity (dI/dV) maps
in the bias-voltage (Vb) region corresponding to the metallic
surface state to study the spatial distribution of the surface
LDOS. The results shown in Fig. 2 exhibit no 1D channel ofhigh LDOS, which is expected for a 1D surface state. The

Fig. 1. (a-c) STM images of the Au-adsorbed Ge(001) surface at 78 K
for three sample-bias voltages (Vb) shown in the figures. One-dimensional chain structure can be always observed while the image largely
depends on Vb. The top of the chain structure consists of a zig-zag part(yellow) and a chevron part (blue) at Vb = -1 V. The both structures are
not clear at Vb = 1 V, and the zig-zag structure turns to a double row at
Vb = - 200 mV. (d) Spatially-averaged STS measured at 5.5 K over anordered 4×8 area (blue) and over an area including point defects and thedomain boundaries of the 4×8 superstructure (black).

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ISSP Activity Report 2014

Fig. 2. (a-c) Differential conductance (dI/dV ) maps at 78 K for threesample-bias voltages (Vb) shown in the figures. The band bottom of
the metallic surface state is located at 150 meV below EF, and the map
indicates LDOS of the metallic state at the corresponding energy. The
conductance peaks are on the zig-zag parts of the top of the chain structures. (d) Simultaneously-obtained topography image (6×6 nm2, Vb =0.5V).

observed LDOS is consistent with the ARPES observation of
the 2D metallic state.
References
1. C. Blumenstein et al., Nat. Phys. 7, 776 (2011).
2. K. Nakatsuji et al., Phys. Rev. B 80, 081406 (2009).
3. J. Park et al., Phys. Rev. B 90, 165410 (2014).
Authors
F. Komori, J. Parka, K. Nakatsuji, T.-H.Kimb S. K. Songa,b, and H. W.
Yeoma,baInstitute for Basic SciencebPohang University of Science and Technology

Conductance Difference in the
Atomic Point Contacts Formedon an Atom and Between Atoms
Hasegawa GroupElectronic conduction through atomic-size metal
contacts is of fundamental interest as a transport throughthe ultimately squeezed conductor. Several seminal
phenomena, such as quantization and step-wise variation in
the conductance, have been reported using a method called
break junction by measuring the conductance just before
the breaking of a nanometer-width wire. In these measurements, since atomic geometry of the point contact cannot
be controlled, the measured conductance fluctuates at every
breaking and, therefore, the results are usually analyzed
statistically using a conductance histogram.
Here, making most of the capability of the atomically resolved imaging of scanning tunneling microscopy(STM), we directly measured the conductance of the atomic
point contact in an atomically controlled manner. We first
positioned the STM tip on a specific site, for instance,
on-top, bridge, and hollow (fcc and hcp) sites, in the crystallographic lattice of the substrate surface, and then measured
the conductance by moving the tip toward the substrate fromtunneling to contact regimes. It was found that the conductance evolution depends significantly on the contact site. In
the contact regime, the hollow site has the largest conduc-Fig. 1. (left) schematic showing the atomic geometry of the atomic
point contacts formed at a on-top site (left) and a 3-fold hollow
site (right) of a close-packed surface. (right) electrical conductancemeasured from tunneling (Δz = -20 pm) to contact (Δz = -60 pm)
regimes. The measured conductance G is normalized by the quantum
conductance G0 given by 2e2/h (~77.5 μS). For each conductance trace,
10 traces taken at the corresponding sites marked in the atomicallyresolved STM image (inset) are averaged.

tance and among the two hollow sites the hcp site is more
conductive than fcc. When the tip is a little bit (20-25 pm!)
far from the contact, a crossover occurs and the conductanceat on-top site becomes largest.
The traces of the electrical conductance measured fromtunneling to contact at on-top, bridge, fcc, and hcp sites of
the Pb(111) surface are shown in the right panel of Fig. 1.
For each plot, 10 traces obtained from the corresponding
marked sites in the inset STM image are averaged. At the
tip displacement Δz of -50~-60 pm from the tunneling(Δz = 0), the atomic contact is formed as the conductanceshows saturation around the quantum conductance G0 givenby 2e2/h (~77.5 μS). The contact conductance shows strongsite dependence; the conductance at the hcp site is largest
and more than 50 % larger than the one measured at the
on-top site. Around Δz = -30~-40 pm, that is, when the tip is
located above the substrate by 20~30 pm from the contact,
the figure show the largest conductance at on-top site.
In order to demonstrate the site dependence, we
performed real-space mappings of the conductance in the
on-top enhancement region and in the contact regime. The
upper-left panel of Fig. 2 is an STM image showing theatomic contrast taken simultaneously with the conductancetraces. At a tip displacement Δz of -32pm, the conductancemapping (lower-left of Fig. 2) exhibits bright contrast at the
on-top site, similarly to that in the topographic image. As the
conductance mapping at Δz =0 does not have any contrast,
the bright contrast indicates the conductance enhancement at
the on-top site. On the other hand, the conductance mappingin the contact regime (lower right of Fig. 2, Δz =-60pm)
has its contrast reversed from that of the topographic
one, indicating a larger conductance at the hollow sitethan at the on-top site. These results indicate that the
point contact conductance is quite sensitive to the atomic
configuration.
When the distance between the tip and substrate is
reduced, the attractive chemical interaction is exerted
between the surface and tip apex atoms. This interaction
presumably opens up the conduction channel and contributes
to the development of the conductance. Schematics in theupper right panel of Fig. 2 show how the chemical interaction works in the case of contacts formed at on-top andhollow sites. When the tip approaches from the tunnelingregime, the attractive interaction is exerted first at the
on-top site (The force-exerted atoms are marked red in theschematics.) because the atom at on-top site is located higher
than that of hollow sites, making the on-top conductanceenhanced. In the contact regime, however, the attractive
force becomes stronger at hollow sites because the numberof involved atoms is greater than that at the on-top site. Thisis probably the reason why conductance becomes larger
there at the contact and why the crossover occurs. Obviously
further theoretical studies are needed to elucidate theobserved conductance behaviors.
Referecce[1] H. Kim and Y. Hasegawa, Phys. Rev. Lett. 114, 206801 (2015).
Authors
H. Kim and Y. Hasegawa

Double Perovskite Ferroelectrics
Lippmaa Group

Fig. 2. Spatial mappings of the conductance at various tip displacements. (upper left) topographic STM image (3.0 × 3.0 nm2) taken
simultaneously with 64 × 64 conductance traces. (lower left) conductance mapping at Δz=-32pm, where the conductance at on-top site isenhanced (lower right) conductance mapping at Δz = -60 pm, that is,the contact regime, where hollow site, particularly hcp site, has large
conductance. (upper right) schematics explaining the site dependenceof the conductance. The atoms on which the chemical interaction isexerted are marked red.

La2NiMnO6 is a double perovskite with a pseudo-cubic
structure where the Ni and Mn atoms at the perovskite
B-site form a natural superlattice along the [111] direction(Fig. 1). Such B-site-ordered double perovskites open interesting materials design possibilities since transition metals
with dissimilar d-electron configurations can be integrated
in a crystal, allowing for tuning of transport, dielectric, ormagnetic properties. In our recent work, we explore theinfluence of epitaxial strain on the dielectric behavior of
the La2NiMnO6 perovskite. This material is ferromagnetic
in bulk form and, as is common for oxides with non-zerod-electron configurations, does not support a polar ferroelectric state. However, first-principles calculations showthat when the rhombohedral crystal is strained, a polar state
can emerge due to a shift of the A-site La atoms from theunstrained equilibrium position, giving rise to macroscopic
ferroelectricity. The structural differences between the bulk
nonpolar and strained polar structures are illustrated in Fig. 1.
The strained crystal structure can be obtained by growing
La2NiMnO6 thin films on a lattice-mismatched SrTiO3
substrate. The lattice expansion in an epitaxial thin film does

ISSP Activity Report 201415

Fig. 1. Crystal structure of an ordered bulk La 2NiMnO6 double
perovskite crystal with Ni (gray) and Mn (blue) atoms arranged inlayers along the [111] direction. The rhombohedral unit cell outline isshown in black. The La atoms are at symmetric positions and the lattice
is nonpolar (top). Under epitaxial strain of about 6%, the A-site La
atoms are displaced, inducing a polar state.

not have a significant effect on the magnetism and a clear
ferromagnetic hysteresis loop can be observed at low temperatures. The magnetic state survives up to room temperature,with a Curie temperature close to 300 K. The ferroelectric state is observable below about 50 K, as illustrated inFig. 2. The ferroelectricity in La2NiMnO6 films is caused by
an offset of the A-site cations, while the magnetism originates from the transition metals at the B-site of the crystal
lattice. The material is thus multiferroic, although there isno direct coupling between the magnetism and the polarity.
Double perovskites are thus an interesting class of materials,
where multiple ferroic orders can be integrated in the samelattice on a microscopic scale by associating the different
types of order with different lattice sites.
A consequence of this differentiation of lattice sites
opens the possibility to tune the polarity and the magnetism
independently of each other. The ferroelectric polarization is strongly dependent on the magnitude of the applied
strain, which has little effect on the magnetic order. The
strain sensitivity can be quite dramatically illustrated by anoticeable shift in the pyroelectric polarization measurement

Fig. 2. Ferroelectric and ferromagnetic hysteresis loops of strained
La2NiMnO6 thin films measured at 10 K, showing that the material ismultiferroic.

16

ISSP Activity Report 2014

response when an in plane strain change by just 0.015% isapplied. This small strain change can be reliably generated
by a structural phase transition that occurs in the SrTiO3
substrate at 105 K. The magnetism, on the other hand, canbe controlled by the level of disorder among the B-site Ni
and Mn cations. For typical thin films, the level of Ni/Mnordering can be adjusted between about 20% and 80% by
adjusting the film growth parameters. This variation leads
to a nearly linear change of the saturation magnetization,
reaching 2.5 µB/B-site for a perfectly ordered lattice andvanishing in a completely disordered material.
A potential limitation in the use of double perovskites
such as La2NiMnO6 is the coexistence of rhombohedraland monoclinic crystal phases. The multiferroic behavior isonly observed in a strained rhombohedral lattice, while themonoclinic phase remains paraelectric at all temperatures.
The phase distribution can be imaged on a macroscopic scaleby scanning nonlinear dielectric microscopy, which visualizes the distribution and polarity of ferroelectric domains in
the films. Further work is required to find ways of controlling the phase formation in thin films by process parametervariations and substrate mismatch selection.
Reference[1] R. Takahashi, I. Ohkubo, K. Yamauchi, M. Kitamura, Y. Sakurai,
M. Oshima, T. Oguchi, Y. Cho, and M. Lippmaa, Phys. Rev. B 91,
134107 (2015).
Authors
R. Takahashi, I. Ohkuboa, K. Yamauchib, M. Kitamura, Y. Sakurai,
M. Oshima, T. Oguchib, Y. Choc, and M. LippmaaaNational Institute for Materials Scienceb
Osaka Universityc
Tohoku University

Pressure Induced
Superconductivity in CrAs
Uwatoko Group
The transition-metal pnictide compounds MX (M = 3dtransition metal, and X = P, As, Sb) have been studied since
1960s as a paradigm for studying the intimated relationshipbetween magnetism and structural parameters of metallic
magnets. Among these compounds, CrAs, stands out due toits peculiar magnetic and structural transitions as detailed
below. At room temperature, CrAs adopts the orthorhombic
MnP-type structure with lattice parameters a = 5.649Å, b =3.463 Å, and c = 6.2084 Å. Upon decreasing temperature to
TN = 265 K, it displays an isostructural, first-order transition
with discontinuous changes of lattice parameters; the mostdramatic change is a sudden jump of lattice constant b by ~3% with a net volume expansion. Neutron powder diffraction measurements revealed that this structural transition isaccompanied by a double helical antiferromagnetic orderwith the localized moments of ~1.7 μB/Cr lying essentiallywithin the ab plane and propagating along the c axis. The
acquisition of localized Cr moment below TN has been rationalized as an itinerant- (or collective) to localized-electrontransition due to the sudden elongation of Cr-Cr separation
along the b direction. By monitoring the resistivity anomaly
at TN, subsequent high-pressure studies have shown that thistransition is very sensitive to external pressure and it can besuppressed completely at ~ 6 kbar. These observations seemAuthors
W. Wua, J.G. Cheng, K. Matsubayashi, P. P. Konga, F. K. Lina,
C. Q. Jina, N. L. Wanga, Y. Uwatoko, and J. L. LuoaaIOP, Chinese Academy of Sciences

Bulk and Edge States in an Atomic
Layer Semiconductor, Phosphorene
Osada Group

Fig. 1. (a) Temperature-pressure phase diagram of the Pressure-Induced
Superconductivity in the antiferromagnetic CrAs. The superconducting
transition temperature Tc has been scaled by a factor of 30 for clarity.
(b) The superconducting shielding fraction at 0.4 K, |4πχ|T=0.4K, andthe superconducting transition temperature width, ΔTc, as a functionof pressure. The symbols of circle (red), square (blue), and triangle(green) in (a, b) represent three independent samples with residual
resistivity ratio RRR = 240, 327, and 250, respectively.

to be consistent with the scenario of localized-to-itineranttransition since pressure tends to reduce the b axis and also
the volume. Thus, CrAs provides us a unique opportunity
to explore the localized-to-itinerant transition as well as thepossible quantum critical point by applying minute pressure.
We measured the resistivity ρ(T) and ac magnetic
susceptibility χ’(T) of a number of CrAs single crystals
under various hydrostatic pressures up to 21.4 kbar in awide temperature range from 300 K down to 70 mK. CrAs
single crystals were grown out of the Sn flux. We found that
CrAs becomes superconducting when its coupled magnetic/
structural transition is suppressed by pressure, and CrAs isthe first superconductor among the Cr-based compounds.
The phase diagram of CrAs is shown in Fig. 1(a). The
major findings include: (i) TN decreases progressively withpressure and vanishes completely at a critical pressure
Pc ≈ 9 kbar; (ii) the transition at TN remains to be first orderuntil disappears and the thermal hysteresis enlarges withpressure; (iii) the superconducting state emerges upon theapplication of pressure, and bulk superconductivity witha volume fraction over 90% develops eventually when TNvanishes completely above 9 kbar, (Fig 1(b); (iv) the established T-P phase diagram resembles those of unconventional
superconductors such as the heavy-fermion and iron-based
superconductors; and Tc(P) displays a dome shape with abroad maximum around 10±2 kbar; (v) the superconducting
state can deteriorate if the level of impurity and/or disorderin the sample is high, a key signature for non-s-wave pairing
symmetry; (vi) the normal-state resistivity was found todeviate from the Fermi-liquid behavior in a large pressure
range. The above observations indicated that the observed
superconductivity in CrAs should fall into the unconventional category [1].
Reference[1] W. Wu, J.-G. Cheng, K. Matsubayashi, P. P. Kong, F. K. Lin, C. Q.
Jin, N. L. Wang, Y. Uwatoko, and J. L. Luo; Nature Communications
5, 5508 (2014).

Phosphorene is a single atomic layer of the layered
crystal of black phosphorus. Its realization using the standard
mechanical exfoliation technique was reported by Liu et al.
in 2014. Since then, a great amount of researches have been
performed on phosphorene. There exist many first-principle
calculations on the electronic structure of phosphorene,
but the tight-binding approach is an easier way to extract
the physical picture. We have qualitatively investigated thebulk and edge electronic structure of monolayer and bilayer
phosphorene under vertical electric fields by employing
the Slater-Koster-Harrison tight-binding model, whichassumes transfer integrals depending only on the inter-atomic
distance.
The crystal structure of monolayer phosphorene is apuckered honeycomb lattice where phosphorus atoms exist
on two parallel planes. So, the external vertical electricfield can modify the electronic structure by introducing thepotential difference between the two planes. The calculated
global band structures under the zero and finite fields areshown in Fig. 1(a) and Fig. 1(b), respectively. The electricfield decreases the energy gap as seen in the Fig. 1. The band
structure of bilayer phosphorene is shown in Fig. 1(c). Theenergy gap becomes smaller than monolayer, resulting fromlifting of valence band top. This unsymmetrical behavior
originates from the fact that the valence band top, mainly
consisting of 3pz orbitals, is largely raised up by interlayer
coupling comparing to the conduction band bottom.
The edge state existing in the gap is a remarkable featureof phosphorene. Figure 2(a) shows the energy spectrum ofmonolayer phosphorene nanoribbon with the zigzag edge.
We can see that a flat edge subband appears in the middleof the main gap. It has two-fold degeneracy and isolated
from the conduction and valence bands. Under the electricfield, it splits into two subbands corresponding to the two

Fig. 1. Band structure of (a) monolayer phosporene, (b) monolayer
phosphorene under the vertical electric field, and (c) bilayer phosphorene. The blue and red surfaces indicate the conduction band and thevalence band, respectively.

ISSP Activity Report 201417

A Scaling Relation for Dangerously
Irrelevant Symmetry-Breaking Fields
Kawashima Group

Fig. 2. Energy spectra in phosphorene nanoribbon with the zigzag
edge. (a) monolayer nanoribbon. (b) bilayer nanoribbon. (c) bilayer
nanoribbon under vertical electric field. Insets show the crystal structure of phosphorene and detail of edge states in bilayer nanoribbon.

phosphorus planes.
In the bilayer phosphorene, two edge subbands, whichcorrespond to bonding and anti-bonding of monolayer edge
states, appear around the main gap at the zigzag edge underzero electric field (Fig. 2(b)). Each one is doubly degenerated
corresponding to two sides of the nanoribbon. Reflecting thevalence band lifting, the upper subband is almost tangent tothe valence band top, whereas the lower one penetrates thevalence band. So, the most part of both edge states overlap
with the valence band in energy. The overlap between theedge state and the valence band causes the hole transferfrom the upper edge subband into the valence band. In
other words, the upper edge state works as acceptor. This
intrinsic hole doping mechanism around the edge might beresponsible for the natural p-type doping in the bulk black
phosphorus. In fact, the estimated averaged hole density is ingood agreement with the reported effective acceptor concentration in black phosphorus.
Under the vertical electric field, the bulk gap is slightly
reduced, and the edge states doubly split since edge states atboth sides of the nanoribbon lie on different atomic planes(Fig. 2(c)). As the electric field is increased, the upper two
split edge states move into the gap separating from thevalence band top. This causes the reduction of the intrinsic
hole doping from the upper edge state.
In monolayer phosphorene, the existence of the midgap
edge state might be crucial for device application, since it
causes current leakage at room temperature. In contrast, thebilayer phosphorene has fewer midgap state. Therefore, we
can expect better device characteristics in bilayer phosphorene. The level of intrinsic hole doping can be controlled by
the vertical electric field. These features of bilayer phosphorene might be better suited for device application.

We studied the effect of a dangerously irrelevant
symmetry-breaking field on critical phenomena and obtained
a new scaling relation. We verified the relation by numericalcalculation of the classical XY model with Z6-symmetry
breaking field in three and four dimensions.
While irrelevant scaling fields play minor roles in mostcases, some of them are quite relevant in the usual sense of
the word. We studied the cases where such a dangerouslyirrelevant scaling field reduces the symmetry of the system,and demonstrated that it yields a new scaling relation. We
considered a generic renormalization-group flow diagram(Fig. 1) including two fixed points; one describing thecritical point and the other the ordered phase. In the casedescribed by this diagram, the perturbation λ may almost
die out at some length scale, say ξ, while it may recover its
amplitude at larger length scale, say ξ'. When the system size
is between the two scaling lengths, ξ<<L<<ξ', the system
would seem ordered but still no effect of the symmetry
breaking can be detected. It may then appear that an intermediate phase exists where the system acquires an emergent
symmetry. A classic example of this type of renormalizationgroup flow is the q-state clock model in three dimensions,and its continuous-spin counterpart.
However, it is now widely accepted that in three dimensions there is no partially ordered phase with the emergent
symmetry. Nevertheless, disagreement still persists
concerning the scaling relation that relates the scaling
exponent ν' and ν that characterize the longer and the shorter
correlation length, respectively. Previously, a scaling relation
was proposed by Ueno et al. [2] and by Oshikawa [3]. Theirarguments are based on the basic assumption that there isa well-defined domain wall splitting the whole system andthe excess free-energy caused by the domain walls is thescaling variable. The excess free-energy density per area ofthe domain wall may be given by the symmetry-breaking
field renormalized up to the scale of locally-correlated
volume, λ(ξ) ≈ λξyλ (yλ represents the scaling exponent of thesymmetry-breaking field at the critical fixed point). The total
domain-wall free-energy, then, may be Ld-1λ(ξ). This yields
a scaling relation ν'/ν = −yλ(d−1). Lou, Sandvik, and Balents[4] presented a similar argument, but they argued that theeffect of the anisotropy free-energy comes from the volume
instead of the domain walls. Therefore, they multiply the

Reference[1] T. Osada, J. Phys. Soc. Jpn. 84, 013703 (2015).
Authors
T. Osada, T. Taen, and S. Fukuoka

Fig. 1. The generic renormalization flow diagram with four fixed
points: P, Q, X, and Y.

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ISSP Activity Report 2014

Kinetic Aspect on Gelation Mechanismof Tetra-PEG Hydrogel
Shibayama Group

Fig. 2. Log-log plot of the angular Fourier transform of the angle
dependent spin-structure factor S̃ for the Z6-anisotropic XY model with
λ6 / J = 5 in three dimensions (a) and in four dimensions (b). For (a)the estimates obtained through the scaling relation ω = 1.983 and ν' =1.511 are used. (b) The corresponding finite-size scaling plot assumingω = 2.0 and ν' = 1 in four dimensions. The critical temperatures Tc/J =2.202 for three dimension and Tc/J = 3.3143 for four dimentions are
estimated from the binder ratios of the magnetization.

renormalized field by the number of correlated volumes, toobtain ν'/ν = 1 − yλ/d.
We presented a new scaling relation, which is similar
to what was speculated previously but is more general andyields different prediction in general. The bare Hamiltonianis along the short line near the point “A” parameterized byt so that t = 0 corresponds to the critical point. If we startfrom the point t = 0 on this line, the scaling flow takes us tothe critical fixed point “X”, where g = gX and λ = 0. In thevicinity of X, the RG flow is characterized by y > 0 for thevariable g and yλ < 0 for the variable λ. If we start from apoint slightly off A, the scaling flow goes through the points“C”, “D”, and approaches the second fixed point “Y” aroundwhich renormalization group flow is characterized by scaling
exponents y' < 0 and y'λ > 0. Because of the presence of λ,the flow deviates from “Y”, and eventually reaches someother fixed point. We obtained the new scaling relationyλξ' ∝ ξa a = 1− − .
y'λ

(

)

To verify the validity of this relation, we computed the structure factor of spin-fluctuation around the mean direction θ0:

〈|

|〉

2
1
Sk(θ0) ≡ − ΣeikrS(r),N r
θ0
where the expectation value is evaluated with the spontaneous symmetry breaking along the direction specified by θ0. The Fourrier transformation of this quantity,

Gels are defined as three-dimensional polymer networks
swollen in solvent. Because of their high retention capacityof solvents, gels are utilized as super absorbent, contactlenses, drug reservoirs, etc. However, industrial applications of gels are still limited because of their low mechanical strength, which results from inhomogeneity createdduring the cross-linking process. One of the most popular
approaches for removing inhomogeneity is an “end-crosslinking” method, which forms a polymer network from
AB-type polycondensation of telechelic prepolymers andmultifunctional crosslinkers. Because of simplicity of its
network structure, mechanical, structural and simulational
studies were conducted on this type of polymer network.
However, from these studies, it is found that this network
still contains inhomogeneities such as spatial concentration fluctuation, connectivity defects, and entanglements.
We developed a novel class of hydrogels by “cross-endcoupling” of two types of tetra-arm poly(ethylene glycol)(PEG) units that have mutually reactive amine (Tetra-PEGNH2) and activated ester (Tetra-PEG-NHS) terminal groups,
respectively [1]. A schematic illustration of the tetra-PEG gel
is shown in Fig. 1, where the red and blue lines represent thecomponent chains.
In order to elucidate the high reactivity and highregularity of the Tetra-PEG gels, we carried out a kinetic
study on the gelation reaction of the two tetra-arm
poly(ethylene glycol) (Tetra-PEG) prepolymers by ATR-IRand UV spectroscopies [2]. The reaction rate constant for thegelation of Tetra-PEG was determined in aqueous solutions
with varying both prepolymer volume fraction, φandmolecular weight, Mw, of the prepolymers. The gelation rate
constant, kgel was successfully estimated for all the systems.
Figure 2(a) clearly shows that the kgel values obtained here
are almost constant within experimental error regardlessof polymer volume fraction, φ, and prepolymer molecularweight, Mw, and their kgel values for Tetra-PEG gel are essentially consistent with those for linearPEG system (Linear5k).
The value of kgel for Tetra-PEG gel is obtained to be around70 dm3 mol-1 s-1, which is much smaller than the reaction
rate of typical diffusion-controlled reaction (e.g., 108 ~109 dm3 mol-1 s-1) and cross-linking photopolymerization(104 ~ 105 dm3 mol-1 s-1). That is, the reaction rate of the~1
Sk ≡ − ∫dθ0 cosθ0 Sk(θ0), is suppose to have the scaling
2π~
behavior Sk ≈ Lωg((Tc−T)L1/ν') with ω ≡ 2(d−yλ−2xh)/(2−yλ).
Figure 2 is the scaling plot of our numerical results. The data
are scaled with the exponents obtained through the scaling
relations quoted above. While there are strong corrections toscaling, the data clearly converging to the expected scaling
function as the system is enlarged.
References[1] T. Okubo, K. Oshikawa, H. Watanabe, and N. Kawashima, Phys.
Rev. B 91 174417 (2015).
[2] Y. Ueno and K. Mitsubo, Phys. Rev. B 43, 8654 (1991).
[3] M. Oshikawa, Phys. Rev. B 61, 3430 (2000).
[4] J. Lou, A. W. Sandvik, and L. Balents, Phys. Rev. Lett. 99, 207203(2007).
Authors
T. Okubo, K. Oshikawa, H. Watanabe, and N. Kawashima

Fig. 1. Schematic illustration showing tetra-arm poly(ethylene glycol)(Tetra-PEG) gel. The red and blue lines represent Tetra-PEG-NH2 andTetra-PEG-NHS chains, respectively. Balls denotes the space occupiedby the polymer chains.

ISSP Activity Report 201419

Fig. 2. (a) The reaction rate constant, kgel, plotted against polymer
concentration φ for 5K LinearPEG, 10K Tetra-PEG, 20K Tetra-PEG,
and 40K Tetra-PEG. (b) Comparison of reaction rate constants of TetraPEG gel, cross-linking photopolymerization, and diffusion-controlled
polymer chain reaction.

amide bond formation is much slower than the collision rateof the terminal NHS and amine groups. From these results,
we concluded that the gelation reaction of Tetra-PEG gel
is not diffusion-limited but reaction-limited process, i.e.
the diffusion motion is much faster than the reaction rate
(Fig. 2(b)). It is thus expected that Tetra-PEG prepolymer
chains can diffuse in the solution during gelation process,leading to homogeneity and high-strength of Tetra-PEG
gel. These discussions imply that, in order to achieve highefficient and homogeneous gel, it is necessary to choose
reaction groups so as to undergo reaction-limited reaction.

from bulk properties. As for the nano-particles of palladium
hydrides, there are drastic changes of H2 pressure-composition phase diagram [1], structures [2,3], etc. Inelastic neutron
scattering (INS) [4] and quasielastic neutron scattering(QENS) [5] works have also been performed though thesize of particles were relatively large (20-30 nm) and there
were adhesions between particles. In this work, to clarify the
structure including hydrogen atoms, we have performed insitu neutron powder diffraction experiments for high-quality
nano-crystalline Pd as shown in Fig. 1(b). The nano-particles
form an edge-cut octahedron enclosed by {111} and {100}facets, and its diameter is 8.0±0.9 nm.
Figure 2 shows the diffraction pattern of nano-crystalline
PdD0.363 measured at 300 K on a total scattering diffractometer NOVA at J-PARC. The amount of the absorbed
deuterium (D) atoms into nano-crystalline Pd is precisely
determined by the hydrogen gas control system installedon NOVA. The data shown in Fig. 2 are obtained after
subtracting the large contribution of incoherent scatteringfrom a protection polymer polyvinylpyrrolidone (PVP)
which is used to avoid the adhesion between the nanoparticles. This is the first neutron diffraction data for nanocrystalline metal hydrides. The crystal structure of nanocrystalline PdDx has been refined by the Rietveld method
as shown by the red curves of Fig. 2. We have examined
the following three structural models: (model a) the O sites
are occupied by the D atoms homogeneously, (model b) theO sites at the surface and subsurface (a few layers near thesurface) are occupied, (model c) both the O sites and tetrahedral (T) sites (1/4,1/4,1/4) are occupied homogeneously.
The best fit result was obtained with the model c. The
obtained fitting parameters are as follows: lattice constanta = 4.010(4) Å, isotropic atomic displacements BPd =0.322(8) Å 2, B D(O) = 1.93(8) Å 2, B D(T) = 14.8(9) Å 2,
occupancies of the O and T sites gD(O) = 0.249 and gD(T) =0.057 under the constraint x = gD(O) + 2gD(T) = 0.363.
Thus, our Rietveld analysis has revealed that D atoms

References[1] T. Sakai et al., Macromolecules 41, 5379 (2008).
[2] K. Nishi et al., Macromolecules 47, 3274 (2014).
Authors
K. Nishi and M. Shibayama

Neutron Diffraction of Nano-crystalline PdD
Yamamuro Group
Palladium hydride (PdHx) is the most popular metal
hydride which has been investigated by many physicists andchemists. It has been remarked also from industrial points ofview, e.g., hydrogen storage, filters, sensors, catalysts, etc.
On the adsorption process, a hydrogen molecule (H2) dissociates into two hydrogen atoms (2H). In the H concentration
region higher than x = 0.6, the hydride crystal takes the βphase with an fcc (NaCl-type) structure as show in Fig. 1(a).
It is known that the H atoms are located at the octahedral (O)sites (1/2, 1/2, 1/2).
The physical and chemical properties of nanometersized materials are of interest since they are often different

20

ISSP Activity Report 2014

Fig. 1. (a) Structure of the β phase of Pd hydrides. The red and blue
spheres show the possible octahedral and tetrahedral sites for hydrogenatoms, respectively. The gray spheres show the Pd fcc lattice. (b) Photographs of transmission electron microscope (TEM) for nano-crystalline
Pd. The size distribution of the nano-particles and the schematic
drawing of an edge-cut octahedron are also shown.

carboxylic acid abbreviated as Cu-CHD. The adsorbed
O2 molecules form dimer-like structure in the nanopores.
Indeed, the magnetic susceptibility of Cu-CHD adsorbing
0.22 mole of O2 per formula unit showed a rapid decrease
with the temperature, suggesting a spin-gap system having
non-magnetic ground state. It was, however, explained not
by S=1 spin dimer but rather by S = 1/2 spin dimer [2]. To
explain the unusual bulk property and to identify the precise
energy scheme, a spectroscopic experiment is necessary.
In the present study we carried out inelastic neutron
scattering (INS) experiments at low temperatures in orderto clarify the spin model of the O2-based magnet realizedin Cu-CHD [3]. We found that the magnetic excitation of
Cu-CHD adsorbing less O2 is explained by a spin-dimersmodel of which the exchange constants are normally distributed as shown in Figs. 1(a) for experiment and 1(e) for
calculation. In contrast, that of Cu-CHD adsorbing more
O2 is explained by a spin-trimers model with the distributed
exchange constants as shown in Figs. 1(b) and (c) for experiments and Figs. 1(f) and (g) for calculations. It is noted that
additional excitation is observed at 0.4 meV in the highFig. 2. Neutron powder diffraction pattern of nano-crystalline PdD0.363
at 300 K and 0.1 MPa. The Rietveld analysis was performed assumingthat D atoms are located at (a) O sites only, (b) O sites around thesurface and subsurface, (c) both O and T sites.

occupy not only the O sites but also the T sites in nanocrystalline Pd. We guess that the T site occupation is due tothe change in potential energy caused by the surface and/or
distortion effects of nano-particles. The present results will
give an important clue to the drastic change of the H atom
dynamics in Pd nano-particles revealed in our recent preliminary neutron scattering work.
References[1] M. Yamauchi et al., J. Phys. Chem. C 112, 3294 (2008).
[2] M. Suleiman et al., J. Alloys and Compounds 644, 356 (2003).
[3] J. A. Eastman et al., Phys. Rev. B 48, 84 (1993).
[4] U. Stuhr et al., J. Phys.: Condens. Matter 7, 219 (1995).
[5] S. Janßen et al., NanoStruct. Mater. 9, 579 (1997).
Authors
H. Akiba, M. Kofu, H. Kobayashi a, H. Kitagawa a, K. Ikeda b,
T. Otomob, and O. YamamuroaKyoto Universityb
KEK

Spin Model of O2-based Magnet
in a Nanoporous Metal Complex
Masuda Group
Natural oxygen, the second abundant constituent in theair, is a magnet having spin S = l induced by a couple ofπg electrons. Remarkable difference from the magnetismof transition metals is that the geometrical configurationof the O2 molecules and the spin state are closely correlated because the molecular potential between a pair of O2
molecules is strongly dependent on the spin state [1]. To
manipulate the oxygen molecule and to artificially synthesize
a novel type of O2-based magnet is a challenge in the new
field of magnetism.
We focus our attention on a metal complex having
one-dimensional nanopores, Cu-Trans-1,4-Cyclohexanedi-

Fig. 1. (a) Inelastic neutron scattering (INS) spectrum for the incident
neutron energy of Ei = 7.74 meV in Cu-CHD adsorbing less O2
molecules. (b) INS spectrum for Ei = 3.14 meV in Cu-CHD adsorbing
more O2 molecules. (c) INS spectrum for Ei = 7.74 meV in Cu-CHD
adsorbing more O2 molecules. (d) Magnetization curve of Cu-CHD
adsorbing less O2 molecules. Experimental and calculation results
are shown with black dots and red line. (e) Calculated INS spectrumof spin dimer model for Cu-CHD adsorbing less O2 molecules. (f)Calculated INS spectrum of spin trimer model for Cu-CHD adsorbing
more O2 molecules in the low energy region. (g) INS spectrum of spin
trimer model for Cu-CHD adsorbing more O2 molecules in the highenergy region. (h) Magnetization curve of Cu-CHD adsorbing more O2
molecules. Experimental and calculation results are shown with black
dots and red line.

ISSP Activity Report 201421

concentration O2 sample. The spin model is, thus, tuned by
the concentration of O2 in this system. Based on the spinmodels with the parameters determined by INS experiments
and by considering the spin-dependent molecular potential,
we quantitatively explained the magnetization curves asshown in Fig. 1(d) for low O2 sample and in Fig. (h) for highO2 sample. The effect of the spin-dependent Van der Waals
potential to the anomalous energy scheme is experimentallyconfirmed.
References[1] B. Bussery and P. E. S. Wormer, J. Chem. Phys. 99, 1230 (1993).
[2] W. Mori, T. C. Kobayashi, J. Kurobe, K. Amaya, Y. Narumi,
T. Kumada, K. Kindo, H. Aruga Katori, T. Goto, N. Miura,
S. Takamizawa, H. Nakayama, and K. Yamaguchi, Mol. Cryst. Liq.
Cryst. 306, 1 (1997).
[3] M. Soda, S. Takamizawa, S.O. Kawamura, K. Nakajima, andT. Masuda, arXiv:1505.03272.
Authors
M. Soda, S. Takamizawa, S. O. Kawamura, K. Nakajima, andT. Masuda

Excitons Bright or Dark ?
Revealed by Ultra-High Magnetic
Fields in Carbon Nanotubes
Takeyama Group
Optical processes of semiconducting single-walledcarbon nanotubes (SWNTs) are well-known to be dominatedby pronounced exciton effects at their band edges [1].
Valley degeneracy and the spins in SWNTs connote very
complicated exciton structures that comprise of a total of 16
excitonic states, among which only one state is optical dipole
active (bright) and all others are optical dipole forbidden(dark) [2]. The ordering and relative energy splitting between
these excitonic states, especially the ordering between brightand dark excitons, are crucial for optical device applications,since they essentially determine relaxation processes andthus the fate of optically or electrically generated carriers.
We carried out systematic high-field magneto-optical
study on the relative ordering between bright and dark
excitons in SWNTs for both 1st (E11) and 2nd (E22) sub-band

Fig. 1. Absorption spectral evolution of the (6, 5) SWNTs in highmagnetic fields up to 186 T. (a) the first sub-band E11 transition; (b)the second sub-band E22 transition. Difference of the splitting peakevolution without any background contribution is unambiguous due tobrightening of the original dark exciton energy position in the absenceof magnetic field. O.D. stands for the optical density.

transitions. Considering the fact that electronic properties of
SWNTs usually show family patterns, we selected the (6,4)
SWNTs as a representative for the Type I species ((2n+m)
mod 3 =1) and (6,5) for the Type II species ((2n+m) mod
3=2) in our study. Highly selected chirality (6,4) and (6.5)
SWNTs, respectively, were separated from a mixture of
HiPco-grown SWNTs by single-surfactant multicolumn gel
chromatography, which was recently developed [3]. The
magnetic fields up to 190 T were generated in the single-turncoil ultra-high magnetic field generation system at the ISSP
International MegaGauss Science Laboratory.
We have identified the relative energy position of thedark exciton by brightening it in ultra-high magnetic fields.
We found that the 1st and 2nd sub-band transitions exhibit
completely different characteristics [4]. For the 1st sub-band
transition, the bright exciton appears to be higher in energy
than its dark counterpart for any chiral species and is robust
against environmental effect. While for the 2nd sub-band,
their relative ordering was found to be chirality-sensitive:
the bright exciton can be either higher or lower than thedark one, depending on the specific nanotube structures(summarized in Table 1). Figure 1 shows the absorption
spectral evolution in magnetic fields for the case of (6,5)
chirality categorized in Type Ⅱ . E22 transition in Fig.1 (b)exhibits the typical behavior that the lowest energy state isbright, which is quite contrast to almost all semiconductormaterials, wherein the dark excitons always locate at thelower energy side of the bright one. The unique chiralitysensitive bright-dark excitonic ordering discovered in thisstudy renders us with possible controllability of the opticalproperties of SWNTs by manipulating the ordering of their
exciton states. The choice of the family pattern could serve
as a guide to select nanotubes with desired exciton structures.
Thus, the findings in this work open up new possibilities forengineering the optical properties of SWNTs and will facilitate future commercial applications
References[1] F. Wang et. al., Science 308, 838 (2005).
[2] T. Ando, J. Phys. Soc. Jpn. 75, 024707 (2006).
[3] H. Liu et al., Nat. Commun. 2, 309 (2011).
[4] W. Zhou, D. Nakamura, H. Liu, H. Kataura, and S. Takeyama,
Scientific Reports 4, 6999 (2014).

Table 1. Relative energy position of bright and dark excitons at the
band-edge of the first and second sub-band in SWNTs dispersed invarious materials. a: I. B. Mortimer et al., PRL 98, 027404 (2007); b: J.
Shaver et al., Nano Lett. 7, 1851 (2007); c: I. B. Mortimer et al., PRB
76, 085404 (2007)22

ISSP Activity Report 2014

Authors
S. Takeyama, D. Nakamura, and W. Zhou

Optical Access to Frustrated Spin Spinel
HgCr2O4 in Pulsed Strong Magnetic Fields
Takeyama GroupHgCr2O4 belongs to a series of the chromium spineloxides ACr2O4 (A = Mg, Zn, Cd, Hg), comprising a threedimensional pyrochlore antiferromagnet, and shows typicalcharacteristics of geometrical spin frustration. Whensubjected to strong external magnetic fields, successive
magnetic phase transitions take place accompanied bydiscontinuous lattice distortions [1]. This material is known
as the first three-dimensional spin frustration system thatexhibits a remarkable half-magnetization plateau phase [2],which has been understood using a bilinear–biquadraticmodel that takes into account the spin–lattice interactions.
Upon decreasing atomic size going from Hg to Zn or Mg
at the A cation site in the pyrochlore lattice, much intense
magnetic fields are required to reveal all of the rich magnetic
phases up to fully saturated magnetization, owing to theincreased nearest-neighbor antiferromagnetic exchangeinteraction. Our group has explored an optical method toapproach magnetic phases in extremely high magnetic fields
and applied to CdCr2O4 [3], ZnCr2O4 [4], and MgCr2O4[5]. A novel magnetic phase that is hidden in conventional
magnetization data has been detected by the optical method,
just prior to the fully polarized moment state. We havetermed this as the last ordered phase (LOP). The LOP wasconcluded to be a phase corresponding to a magnetic “superfluid” state, inferred from an analogy to symmetry breakingof the quantum phases in 4He, whereas the detailed spin
structure is not yet clarified. One of the plausible candidate

Fig. 1. Absorption spectra obtained at 4.2 K in a region of wavelengths
where 4A2 → 4T2 and EMP transitions are observed in polycrystalline
powder HgCr2O4 embedded in Stycast solid resin.

Fig. 2. Change of the EMP absorption spectra in magnetic fields.

Fig. 3. (a) Changes in an integrated intensity of the EMP absorption
peak in magnetic fields. (b) Magnetization M and its derivative dM/dB
as a function of magnetic field, measured at 1.8 K [2], and (c) Variation of the lattice parameter Δa plotted against magnetic field. The data(circle) are reproduced from Fig. 2. in ref. [1].

is the spin “nematic” state. There needs, however, various
experimental approach for verification. On the other hand,
the magnetic-field strengths (B) at which the LOP is realized
are extremely large and methods of measurement probes
are quite restricted. The LOP in HgCr2O4 could be detected
in magnetic fields around 40 T, much lower than those in
CdCr2O4 and ZnCr2O4. However, in case of HgCr2O4, only
powdered samples were available, that has been a hurdle forthe optical approaches.
An exciton-magnon-phonon (EMP) absorption spectra
were detected in a powder sample dispersed in Stycast
1266 transparent sold resin (Fig. 1), and the spectra were
measured in magnetic fields up to 55 T (Fig. 2). The EMP
absorption, reflecting a magnon density of states, showed theintensity variations corresponding to the point of successive
phase transitions consistent with those of magnetization [2],lattice distortions [1], and electron magnetic resonance [6]measurements, where successive anomalies reported by othergroup. All these data are summarized in Fig. 3. This study
has revealed that a fourth phase, termed LOP, also exists in
HgCr2O4 and is related to the magnetic “superfluid” statethat has also been observed in CdCr2O4 and ZnCr2O4 prior
to the full-saturation phase. This study has revealed that theexistence of the “superfluid” magnetic state, possibly of thespin “nematic” state is of universal among the chromium
spinel magnetic frustrating oxides [7].
References[1] Y. Tanaka , Y. Narumi , N. Terada , K. Katsumata, H. Ueda, Urs
Staub, K. Kindo, T. Fukui, T. Yamamoto, R. Kammuri, M. Hagiwara,
A. Kikkawa, Y. Ueda, H. Toyozawa, T. Ishikawa, and H. Kitamura,
J. Phys. Soc. Jpn. 76, 043708 (2007).
[2] H. Ueda, H. Aruga Katori, H. Mitamura, T. Goto, and H. Takagi,
Phys. Rev. Lett. 94, 047202 (2005).
[3] A. Miyata, S. Takeyama, and H. Ueda, Phys. Rev. B 87, 214424(2013).
[4] A. Miyata, H. Ueda, Y. Ueda, H. Sawabe, and S. Takeyama, Phys.
Rev. Lett. 107, 207203 (2011).
[5] A. Miyata, H. Ueda, and S. Takeyama, J. Phys. Soc. Jpn. 83,
063702 (2014) .
[6] S. Kimura, M. Hagiwara, T. Takeuchi, H. Yamaguchi, H. Ueda,
Y. Ueda, and K. Kindo, Phys. Rev. B 83, 214401 (2011).

ISSP Activity Report 201423

[7] D. Nakamura, A. Miyata, Y. Aida, H. Ueda and S. Takeyama,
J. Phys. Soc. Jpn. 83, 113703 (2014).
Authors
D. Nakamura and S. Takeyama

High Field Investigation of Field Induced
Phase Transitions in BiCu2PO6
Kindo, Y. Matsuda, and Takeyama Groups
A frustrated two-leg ladder spin-gap system, BiCu2PO6,
has recently attracted intense theoretical and experimental
interest [1,2]. An application of a magnetic field along theleg direction of the spin ladder (H//b) closes the spin gap at
Hc1 ~ 20T and induces a series of field-induced phase transitions at higher magnetic fields [1]. Recent nuclear magnetic
resonance (NMR) experiments by F. Casola have observed a
triple-peak NMR profile in the intermediate field range from
20 to 35 T, and they have interpreted it as an appearance ofan exotic "quantum soliton phase" [2]. However, since themeasurements at high magnetic fields are experimentallychallenging, detailed researches above 35 T remain scarce. In
this context, we have experimentally investigated the fieldinduced phase-transitions under ultrahigh magnetic fields,
i.e. up to 120 T, for three different crystallographic axes,
by means of a combination of state-of-the-art techniques
including specific heat (Cp), magnetocaloric effect (MCE),
magnetization (M), and Faraday rotation (ΘM) [3]. Here wehave provided the thermodynamic evidence for the formation and the subsequent collapse of this field-induced soliton
lattice.
Figure 1 shows the (H,T) phase diagram for BiCu2PO6.
The phase boundaries depicted by open triangles and circles
were determined by Cp and MCE measurements, respectively. Here, it should be emphasized that the MCE measurement were carried out under adiabatic conditions. Thus, theobtained MCE curves correspond to isentropic temperaturechanges as a function of the magnetic field, i.e., the entropy
remains constant when collecting reversible MCE curves.
Using the isentropic curve and specific heat data, we havesucceeded to estimate the magnetic entropy (SM), as seen in
Fig.1(a)-(c) as color contour plots. We find that the Phase
IIb (20 T < H < 35 T // b axis) can be characterized by highentropy, which is subsequently observed to disappear whenentering phase IIIb. This observation is in line with a recent
study suggesting the formation and the collapse of a soliton
lattice [2], which is predicted to have high entropy due to theshort-ranged magnetic order.

Fig. 2, (a) Magnetization (M) of BiCu2PO6. Thin curves were obtainedby using a single turn coil. Thick curves were measured in a 75 T
nondestructive pulsed magnet. (b) Field dependence of Faraday rotation
angle (ΘM) at 10 and 16 K. The magnetic field was applied along the aaxis.

The magnetization (M) and Faraday rotation (ΘM) shownin Fig. 2 captures further features in the ultrahigh magnetic
field region. (i) For H//a, additional weak anomalies in M areobserved in fields exceeding 60 T, a kink and a shoulder in M
at 65 and 80 T (red arrows), respectively, indicating further
field-induced transitions. This finding is also supported bythe ΘM measurements as a function of H [Fig. 2(b)]. (ii)
When the external magnetic field is applied along the baxis, we can find a broad shoulder in M at 80 T (indicatedby a black arrow). For H//c, an upturn at 75 T is evident
in M (blue arrow). Although we observe a strongly anisotropic magnetization, the sequence of field-induced transitions continues above 60 T, regardless of field orientation.
Our results indicate that BiCu2PO6 undergoes a sequenceof novel phase transitions from a quantum soliton lattice toother exotic states under fields up to 120 T.
References[1] Y. Kohama, S. Wang, A. Uchida, K. Prsa, S. Zvyagin, Y. Skourski,
R. D. McDonald, L. Balicas, H. M. Ronnow, C. Rüegg, and M. Jaime,
Phys. Rev. Lett. 109, 167204 (2012).
[2] F. Casola, T. Shiroka, A. Feiguin, S. Wang, M. S. Grbić,
M. Horvatić, S. Krämer, S. Mukhopadhyay, K. Conder, C. Berthier,
H.-R. Ott, H. M. Rønnow, Ch. Rüegg, and J. Mesot, Phys. Rev. Lett.
110, 187201 (2013).
[3] Y. Kohama, K. Mochidzuki, T. Terashima, A. Miyata, A. DeMuer,
T. Klein, C. Marcenat, Z. L. Dun, H. Zhou, G. Li, L. Balicas, N. Abe,Y. H. Matsuda, S. Takeyama, A. Matsuo, and K. Kindo, Phys. Rev. B
90, 060408(R) (2014).
Authors
Y. Kohama and K. Kindo

Possible Excitonic Phase in the
Quantum Limit State of Graphite
Tokunaga and Kindo Groups
Fig. 1. (a)-(c) Contour map of S(T ,H) for H//a (left), H//b (middle), andH//c (right). The contour plot of SM (T ,H) is constructed through linear
interpolation of a series of MCE data. The phase boundaries determinedby MCE and specific heat are also shown as open circles and open
triangles, respectively. The solid dots are the phase boundaries reported
in Ref. [1].

24

ISSP Activity Report 2014

The quantum limit state, where all carriers are accommodated in the lowest Landau level, exhibits various anomalous phenomena because of the strong correlation acting on
the carriers confined by magnetic fields. This state can berealized only in extremely high magnetic fields, the order of104 T, in ordinary metals.
Graphite is a semimetal having a small number ofelectrons and holes ( ~ 3 × 1018 cm-3 for each) and goes
into the quasi-quantum limit state, where only the lowest
electron-like (Landau index n = 0, spin ↑ and ↓) and holelike (n = −1, ↑ and ↓) subbands are populated in magnetic
fields above 7.4 T applied along the c-axis. With further
increasing the field, emergence and collapse of a density
wave state has been claimed through measurements ofin-plane (ρ xx) and out-of-plane (ρ zz) resistivity [1]. In
addition, recent magnetoresistance measurements up to 80 T
suggested emergence and collapse of another gapped state at
53 T and 75 T, respectively [2]. The actual nesting vector inthese density wave states and also the underlying structure of
the subbands, however, remain unclear as yet because of thelimited experimental technique available above 25 T.
We studied Hall resistivity (ρxy) and magnetization insingle crystals and pyrolytic graphite in pulsed high magnetic
fields [3]. As the main feature of the results, the ρxy becomesalmost zero as the field approaches 53 T, where ρxx and ρzz
show anomalies as shown in Fig. 1. In the microscopic pointof view, the Hall resistance is given by summation of thematrix elements of the current operator between the states
having different Landau indices Δn = 1 and, hence, sensitive to the whole dispersion curves of the relevant subbands.
The almost zero Hall resistance seems consistent with theexistence of two populated subbands (n = 0↓ and n = −1↑)[1] rather than the less-symmetric three subband model(n = 0↑ , n = 0↓ and n = −1↑) [2]. Thereby, the quantum
limit state likely emerges above 53 T. In this quantum limit
state, density wave can be formed by the nesting between the
Fermi points of the n = 0↓ and n = −1↑ subbands, which isequivalent to the BCS-like pairing state of excitons. Further
studies are needed to clarify the nature of the additional
phase transition at 75 T in this quantum limit state.

Fig. 1. (upper) In-plane (ρxx) and out-of-plane (ρzz) resistivity ofgraphite single crystals as a function of magnetic field applied along
the c-axis at temperature of 1.4 K. (lower) Magnetic field dependence
of in-plane Hall resistivity (ρxy) of graphite at 1.4 K. The colored areas
represent different electronic phases suggested by transport measurements. The inset of the lower panel shows schematic illustration of thedispersion curves of the populated subbands above 53 T.

References[1] H. Yaguchi and J. Singleton, J. Phys.: Condens. Matter 21, 344207(2009).
[2] B. Fauqué et al, Phys. Rev. Lett. 110, 266601 (2013).
[3] K. Akiba et al, J. Phys. Soc. Jpn. 84, 054709 (2015).
Authors
K. Akiba, A. Miyake, H. Yaguchia, A. Matsuo, K. Kindo, andM. TokunagaaTokyo University of Science

Insulator-Metal Transitionin Perovskite Cobalt Oxides
at Ultrahigh Magnetic Fields
Y. Matsuda and Takeyama Groups
Phase transitions between metal and insulator are a
subject that has been fascinating scientists for a long time.
According to the one-electron approximation, materials
whose energy band is partially occupied by electrons become
metal. In 1930’s, however, it had already been pointed
out that some materials don’t obey this rule. Nowadays,
it is known that the electron-electron interaction plays animportant role for making materials insulating and exotic
phenomena such as non-Fermi liquid behavior and unconventional superconductivity emerge in the vicinity of themetal-insulator transition. The insulating phases of many
materials appear along with interesting magnetic features
such as antiferromagnetic order, spin gap formation and spinstate transition [1]. Possible control of metal-insulator transitions by magnetic field is one of the most intriguing researchsubjects.
In the present work, we studied the magneticfield-induced insulator–metal transition in perovskite
cobalt oxides (Pr 1-yYy)0.7Ca0.3CoO3 (y = 0.075, 0.10).
(Pr1-yYy)1-xCaxCoO3 is obtained by substitution of Y for apart of Pr in Pr1-xCaxCoO3 that shows a sharp first-order spinstate (SS) transition of Co only when x is close to 0.5. The
striking point is that the metal-insulator (MI) transition and
the SS transition take place at the same time at 90 K. It is
recently found that (Pr1-yREy)1-xCaxCoO3 (RE= rare-earth
element) also exhibits the first-order MI-SS transition evenwhen x is different from 0.5 and the transition temperature

Fig. 1. Schematic view of a pair of coils and a sample for the highfrequency contactless electrical resistivity measurement. The coils arefor injection and detection of the electromagnetic wave, respectively.
The frequency range employed is 240 – 400 MHz. The magnetic fielddependence of the electrical resistivity is obtained as the field variationof the transmission of the electromagnetic wave through the sample.

ISSP Activity Report 201425

MI transition. Although the microscopic understanding of
the MI-SS transition is still in controversy, the obtained B-T
phase diagram sheds new light on this problem.

Fig. 2. The magnetic field-temperature (B-T) phase diagram determinedby the magnetoresistance experiment. The higher field phase boundary(open circles) is obtained in the field-increasing process of the pulsed
magnetic field and the lower field phase boundary (filled circles) by thefield-descending process. The hysteretic behavior is the evidence of thefirst-order phase transition. Judging from the width of the hysteresis,
the first order nature is more prominent in y=0.075 (a) than y=0.10 (b).

can be tuned by x and y [2]. We employed polycrystals of(Pr1-yYy)0.7Ca0.3CoO3 (y=0.075, 0.10) that were grown by asolid-state reaction method. The MI transition temperatures(TMI) at zero magnetic field are 64 and 93 K for y=0.075
and 0.10, respectively. One can expect that a magnetic
field induces the metallic phase at low temperatures when
the Zeeman energy overcomes the energy gap between the
different spin states. In order to realize the phase transition, ultrahigh magnetic fields in the range of 100 T will be
required because the TMI is rather high.
The single-turn coil method is utilized for generationof the pulsed magnetic fields over 100 T. We used the highfrequency contactless technique to measure the electricalresistivity of (Pr1-yYy)0.7Ca0.3CoO3 (y=0.075, 0.10). The
sample is sandwiched by two small coils; one coil is forgeneration of electromagnetic wave and another is for
detection of the wave after transmission of the sample. The
measured intensity of the transmitted wave is a function of
the electrical resistivity of the sample (e.g., the transmission
is small when the resistivity is low owing to the shielding
effect by the eddy current) and we can obtain the magnetoresistance from the magnetic field variation of the transmission. The schematic view of the coils and sample is shownin Fig. 1. This method was originally developed by Sakakibara et al. [3]. We modified the dimensions and used higher
frequencies (240 – 400 MHz) to optimize the method for thepresent work.
As results of the experiment, we found that the transmission showed an abrupt decrease at certain magnetic field
when the temperature is lower than TMI, suggesting theinsulator–metal transition occurs by magnetic fields. The
phenomenon was observed in both samples but the transition
magnetic field depends on sample and temperature. Figure 2
shows the magnetic field-temperature (B-T) phase diagram
for the MI-SS transition in (Pr1-yYy)0.7Ca0.3CoO3 (y=0.075,0.10) [4] . The marks denote the transition magnetic fields at
different temperatures. The MI-SS transition is the first-ordertransition and we observed significant hysteretic behavior.
The higher-field values in Fig. 2 are obtained in the fieldincreasing process and the lower-field values in the fielddescending process. Considering the Clausius–Clapeyron
relation, the obtained phase boundary indicates that theentropy change is important for the transition. However, theentropy change expected from only the SS transition cannot
explain the phase boundary. Moreover, recent discovery of
the valence change of Pr at the MI-SS transition [5] suggeststhat not only Co but also Pr plays an important role for the

26

ISSP Activity Report 2014

References[1] M. Imada, A. Fujimori, and Y. Tokura, Rev. Mod. Phys. 70, 1039
(1998).
[2] T. Naito, H. Sasaki, and H. Fujishiro, J. Phys. Soc. Jpn. 79, 034710(2010).
[3] T. Sakakibara, T. Goto, and N. Miura, Rev. Sci. Instrum. 60, 444(1989).
[4] S. Lee, Y. H. Matsuda, T. Naito, D. Nakamura, and S. Takeyama, J.
Phys. Soc. Jpn. 84, 044703 (2015).
[5] H. Fujishiro, T. Naito, S. Ogawa, N. Yoshida, K. Nitta, J.
Hejtmánek, K. Knížek, and Z. Jirák, J. Phys. Soc. Jpn. 81, 064709(2012).
Authors
S. Lee, Y. H. Matsuda, T. Naitoa, D. Nakamura, and S. TakeyamaaIwate University

Electron-Hole Recombination on
ZnO(0001) Single-Crystal Surface
Studied by Time-Resolved SoftX-Ray Photoelectron Spectroscopy
I. Matsuda Group
Zinc oxide (ZnO) has attracted much attention for its
optoelectronic applications, e.g. photovoltaics, light-emitting
diode, and photocatalyst. One of the important factors in
the photo-induced function is dynamics of photoexcited
carriers that govern optical and electronic phenomena, andtheir lifetime is directly related to efficiency of the optoelectronic functionalities. Recently, time-resolved photoemission
spectroscopy has been carried out to trace relaxation of thephotovoltage effect on various semiconductor surfaces. The
relaxation is a consequence of decay of the photo-excited
carriers or electron-hole (e-h) recombination and, thus,

Fig. 1. (a) Atomic structure of an ideal ZnO crystal. Time-dependencesof (b) surface photovoltage, VSPV, taken with the laser intensity of
113 mJ/cm2/pulse, and (c) carrier lifetime (τt) during the relaxation of
the SPV effect. The inset shows the schematic drawing of electronhole recombination at or near the surface. In (b), the data points are
curve-fitted with the thermionic model. Variation of τt is obtained withτt = τ0 exp {(Vs – VSPV)/ηkT}, where η=2.0 and τo=1.7 ps.

the decay constant of surface photovoltage (SPV) directly
corresponds to the lifetime of photoexcited carriers. In thepresent research, we report the detailed investigation of thetime-resolved soft X-ray PES experiments on a ZnO(0001)
surface to clarify the carrier dynamics [1].
A ZnO crystal has wurtzite structure and the (0001)
surface is terminated with zinc atoms (Fig. 1(a)). The e-hpairs are generated by the irradiation of the femtosecondpulse laser, and the following charge separation leads to
the SPV generation. The relaxation of the SPV was foundto take nanoseconds, as shown in Fig.1(b). The relaxation
process is fairly described by a thermionic model, in which
the photoexcited carriers overcome the surface potential,
Vs, to be transported to the surface and then recombine withthe counterparts accumulated at the surface. The potential,
generated by the bulk band-bending effect near the surface
and the Vs value, was evaluated by valence band photoemission spectroscopy measurements of the sample surface. By
tracing the relaxation of the SPV effect, we determined aphotoexcited carrier lifetime at the surface under the flatband condition on the ZnO(0001) surface to be τo=1.7 ps
and the lifetime exponentially increases with temporal variation of surface potential barrier (Fig.1(c)). The obtained
carrier lifetime at the surface matches with values of thesurface carrier decay time (~1ps) reported in the literaturesof femtoseconds-time-resolved reflectivity and transmissivity
experiments [2]. The agreement implies the relaxation of the
SPV effect on the ZnO(0001) crystal proceeds with thermal
diffusion of photo-excited carriers and the e-h recombination was evaluated to held at the depth of 30–100 nm fromthe surface. It has been discussed that the density of singly
ionized oxygen vacancy traps (which can be the recombination centers) is much higher in such a surface recombination
layer than in the interior of the crystal. It is inferred that e-hrecombination takes place at the trapping sites at the topmost
surface (the surface state) and in the subsurface layer (theimpurity states) with the different carrier-capturing crosssections. The understanding leads to both developments ofa new optoelectronically functional materials and improvements of the efficiency.
References[1] R. Yukawa, S. Yamamoto, K. Ozawa, M. Emori, M. Ogawa,Sh. Yamamoto, K. Fujikawa, R. Hobara, S. Kitagawa, H. Daimon,
H. Sakama, and I. Matsuda, Appl. Phys. Lett. 105, 151602 (2014).
[2] M. A. M. Versteegh, T. Kuis, H. T. C. Stoof, and J. I. Dijkhuis,
Phys. Rev. B 84, 035207 (2011).
Authors
R. Yukawa, S. Yamamoto, and I. Matsuda

Fig. 1. Layout of the 15-GHz laser.

as a calibration source for astronomical spectrographs.
In astronomy one of the main research topics is searchingfor Extra-solar planets. Extra-solar planets are detected bya Doppler shift of the absorption spectrum of the fixed starwith a carefully-calibrated spectrograph, and then, one canderive the information about the planets, for example its
revolution period, distance from the host star and its weight.
In order to detect an Earth-like planet around a Sun-like fixed
star, the spectrograph needs the calibration level within avelocity of 10 cm/s, corresponding to the wavelength shiftof 0.3 femtometer at the center wavelength of 1000 nm, as a
Doppler shift during more than one year, which is extremelydifficult task. Although usually I2 cell or Th-Ar lamp havebeen used for a conventional calibration sources, they do notsatisfy the long-term stability, traceability and the spectral
cover range. OFC is one of the alternatives to concur suchdrawbacks. It is because that OFC emits a broadband comblike spectrum and the longitudinal modes are evenly spaced
by a separation equal to the pulse repetition rate. That is,
OFC is an ideal “frequency scale” for spectrographs.
Conventional OFCs, however, cannot be used for afrequency scale. Typically, mode separation is less than the
resolution of spectrograph, several hundred MHz and GHz
respectively — imagine a ruler with too dense scales to beresolved by your eyes. The mode spacing of 10 to 20 GHz,
hundred times higher than that of typical OFCs, is required.
One of the methods to obtain such large mode spacing isusing several Fabry–Pérot cavities as harmonic mode filters.
This scheme, however, significantly increases apparatus
complexity and cannot perfectly suppress the unwanted
adjacent modes. In our group, an OFC with a mode spacingof 15 GHz has been developed based on a 15-GHz femtosecond laser [1]. This OFC directly produce a comb-like
spectrum with sufficiently large mode spacing to be resolved
by a conventional spectrograph and it would be a suitablecalibration source. Figure 1 shows the 15-GHz femtosecond
laser. The laser composed four-mirror ring cavity with acavity length of only 2 cm, as so far this is the shortest cavity

15-GHz Optical Frequency Comb
as Calibration Source for
Astronomical Spectrographs
Kobayashi Group
Optical frequency comb (OFC), based on a frequencystabilized femtosecond mode-locked pulsed laser, havebecome an invaluable tool in precision applications,
including optical clocks, frequency metrology and spectroscopy. Our group are developing OFCs and studying precision
spectroscopies with OFC. Here, we highlight a 15-GHz OFC

Fig. 2. Optical spectra measured with an optical spectrum analyzer at aresolution of 2 nm and (inset) 16 pm.

ISSP Activity Report 201427

length in femtosecond Kerr-lens mode-locked lasers. The
gain material was an ytterbium-doped Y2O3 ceramic and thelaser emitted a pulse with a pulse duration of 152 fs and an
average power of 60 mW. The optical spectrum is shown in
Fig. 2. Thanks to sufficiently high repetition rate, a commercial spectrometer could resolve comb structure. One of thelongitudinal modes of the 15-GHz laser was phase locked toan optical frequency standard, semiconductor laser locked toan ultra-low expansion glass cavity with a frequency drift ofless than 0.5 MHz/month. Furthermore our laser was pumped
by a reliable semiconductor laser diode, which was suitable
for long-term operation.
In this report, we especially focused on a calibration
source of spectrograph as a 15-GHz OFC application. The
reported 15-GHz OFC also has a potential to expand the
comb applications, including optical arbitrary waveformgeneration, low-phase noise microwave generation.
Reference[1] M. Endo, I. Ito, and Y. Kobayashi, Opt. Express 23, 10564 (2015).
Authors
M. Endo, S. Tani, I. Ito, and Y. Kobayashi

Generation of Isolated Attosecond SoftX-Ray Pulses in the Water Window
Itatani GroupHigh harmonic generation using Ti:sapphire lasers at
800 nm is well established in 1990’s, and has opened a way
to produce attosecond optical pulses in the extreme ultraviolet (EUV). The spectral range of such attosecond pulses,
however, remains in the EUV (< 200 eV in photon energy, or> 5 nm in wavelength). It has been expected that the spectral
range of attosecond pulses can be drastically extended tothe soft X ray region by using an ultrashort light source ina longer wavelength because low-frequency strong fields
can accelerate electrons to much higher kinetic energies.
The accelerated electron’s kinetic energy is then converted
to a photon energy in the recombination process of highharmonic generation. However, such ultrashort-pulse infrared(IR) sources have been not available because of the lack ofappropriate laser media in the IR or mid IR.
Here we report on the recent breakthrough in producing
isolated attosecond pulses in the soft X ray region (up to~325 eV in photon energy) by using a newly developed IR
light source that is based on optical parametric chirped pulse
amplification (OPCPA). The OPCPA, unlike chirped pulse

Fig. 1. (a) Experimentally obtained high harmonic spectra recordedwith varying the CEP with steps of 0.1 π radian. (b) Simulated highharmonic spectra assuming 10-fs optical pulses at 1600 nm with anintensity of 3.8 × 1014 W/cm2.

28

ISSP Activity Report 2014

amplification in Ti:sapphire lasers, is based on parametricamplification in nonlinear transparent crystals. By appropriately selecting the nonlinear crystals, pump lasers, andphase-matching conditions, we can design the spectral
properties of optical amplification. We have developed afull-scale OPCPA system that uses BiB3O6 (BIBO) crystals
as nonlinear media and a Ti:sapphire laser system around
800 nm as a pump source. With this novel combination of
BIBO and Ti:sapphire, the BIBO-based OPCPA exhibits an
extremely broad gain bandwidth spanning from 1100 to 2200
nm. This nearly-octave spanning bandwidth enables us toamplify few-cycle IR pulses directly in the OPCPA system.
We have successfully produced 0.55-mJ, 10-fs pulses
centered at 1600 nm at a repetition rate of 1 kHz. This pulse
duration corresponds to sub-two cycles of the carrier wave
at 1600 nm. The output of the OPCPA system was focused
onto a gas cell containing neon to produce high harmonics.
We observed soft X-ray spectra of high harmonics up to 325
eV, which is well reaching the water window or covering thecarbon K edge. The spectral structure below the cutoff wasobserved to be extremely sensitive to the carrier envelope
phase (CEP) of the driver pulses. By changing the CEP,
we observed a drastic shift of the peak structure in the soft
X-ray spectra. This behavior is known as a half-cycle cutoff,which is an important signature for the production of isolated
attosecond pulses.
This work is indeed a milestone to extend attosecond
spectroscopy from the EUV to the soft X ray, where weare aiming the first demonstration of ultrafast soft-X-ray
spectroscopy that can probe element-specific electronic
states of condensed matters. Such laser-based ultrafast soft
X-ray sources are expected to play an important role, whichis complementary to other soft X-ray sources such as 3rd
generation synchrotrons and X-ray free electron lasers.
Reference[1] N. Ishii, K. Kaneshima, K. Kitano, T. Kanai, S. Watanabe, and
J. Itatani, Nature Commun. 5, 3331 (2014).
Authors
N. Ishii, K. Kaneshima, K. Kitano, T. Kanai, S. Watanabea, and
J. Itatani.
aTokyo University of ScienceISSP Activity Report 201429

Highlights of Joint Research
Supercomputer CenterAll 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 done by
the Supercomputer Project Advisory Committee. In school
year 2014 totally 247 projects were approved. The total
points applied and approved are listed on Table. 1 below.
The research projects are roughly classified into thefollowing three (the number of projects approved):

The Supercomputer Center (SCC) is a part of theMaterials Design and Characterization Laboratory (MDCL)of ISSP. Its mission is to serve the whole community ofcomputational condensed-matter physics of Japan providing
it with high performance computing environment. In particular, the SCC selectively promotes and supports large-scalecomputations. For this purpose, the SCC invites proposals forsupercomputer-aided research projects and hosts the Steering
Committee, as mentioned below, that evaluates the proposals.
The ISSP supercomputer system consists of three subsystems: System A, which is intended for a parallel computation with relatively smaller number of nodes connected
tightly, and System B, which is intended for more nodes withrelatively loose connections. In July, 2010, the SCC replaced
the two supercomputer subsystems. The current system B is
SGI Altix ICE 8400EX, which consists of 30 racks or 15360
cores whereas the system A is NEC SX-9, which consists of
4 nodes or 64 cpus. They have totally 200 TFlops. System C- FUJITSU PRIMEHPC FX10 was installed in April, 2013.
It is highly compatible with K computer, the largest supercomputer in Japan. System C consists of 384 nodes, and eachnode has 1 SPARC64TM IXfx CPU (16 cores) and 32 GB ofmemory. The total system achieves 90.8 TFlops theoreticalpeak performance.
The hardware administration is not the only function of
the SCC. The ISSP started hosting Computational Materials
Science Initiative (CMSI), a new activity of promoting
materials science study with next-generation parallel supercomputing. This activity is financially supported by the
MEXT HPCI strategic program, and in CMSI, a number ofmajor Japanese research institutes in various branches ofmaterials science are involved. The SCC supports the activities of CMSI as its major mission.

Class

Max/Min
PointsApplication

Numberof
Projects

All the three involve both methodology of computationand its applications. The results of the projects are reported
in 'Activity Report 2014' 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 2014, thefollowing three invited papers are included:"All-Electron First-Principles GW+Bethe-Salpeter
Program: Development & Applications", Yoshifumi
NOGUCHI"First-Principles Study on Superconductivity in AlkaliDoped Fullerides", Ryotaro ARITA"Development of Simulation Methods for Membrane
Protein Structure Predictions and Replica-Exchange
Methods", Ryo URANO and Yuko OKAMOTO

Total Points
AppliedApproved

System A

System B

System C

System A

System B

System C

500

600

400

500

600

400

A

100

any timeB

2k, 1k, 500

twice a year

53

40.8k

44.8k

6.3k

33.8k

29.4k

5.7k

C

20k, 10k, 2.5k

twice a year151

637.0k1210.2k

141.2k

429.0k

360.5k

111.4kD

20k, 10k, 2.5k

any time

10

12.0k

71.7k

0

12.0k

57.6k

0

E

0, 30k, 2.5k

twice a year23-

621.0k

42.0k

-270.0k

37.4k

twice a year

1

0

60.0k

0

0

25.0k

0

CMSI

18

-

-

-

-

-

140.0kTotal

265

690.3k

2,008.3k

189.9k

475.3k

743.1k294.9kS

9First-Principles Calculation of Materials Properties (119)Strongly Correlated Quantum Systems (38)
Cooperative Phenomena in Complex, Macroscopic
Systems (90)Table 1. Research projects approved in 2014
The maximum points allotted to the project of each class are the sum of the points for the two systems; Computationfor 1 CPU· hour corresponds to 0.32, 0.022, and 0.042 points for System-A, System-B, and System C, respectively.

30

ISSP Activity Report 2014

Neutron Science Laboratory
The Neutron Science Laboratory (NSL) has been playing
a central role in neutron scattering activities in Japan since
1961 by performing its own research programs as well as
providing a strong General User Program for the universityowned various neutron scattering spectrometers installedat the JRR-3 (20MW) operated by Japan Atomic Energy
Agency (JAEA) in Tokai (Fig. 1). In 2003, the Neutron
Scattering Laboratory was reorganized as the Neutron
Science Laboratory to further promote the neutron science
with use of the instruments in JRR-3. Under the General
User Program supported by NSL, 14 university-group-owned
spectrometers in the JRR-3 reactor are available for a wide
scope of researches on material science, and proposals close
to 300 are submitted each year, and the number of visiting
users under this program reaches over 6000 person-day/year.
In 2009, NSL and Neutron Science Laboratory (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).
HRC covers a wide energy and Q-range (10μeV < ℏω < 2eV
and 0.02Å-1 < Q < 50Å-1), and therefore becomes complementary to the existing inelastic spectrometers at JRR-3.
HRC started to accept general users through the J-PARC
proposal system in FY2011.
Triple axis spectrometers, chopper spectrometer (HRC),
and a high resolution powder diffractometer are utilized fora conventional solid state physics and a variety of research
fields on hard-condensed matter, while in the field of softcondensed matter science, researches are mostly carried out
by using the small angle neutron scattering (SANS-U) and/or neutron spin echo (iNSE) instruments. The upgraded timeof-flight (TOF) inelastic scattering spectrometer, AGNES, isalso available through the ISSP-NSL user program.
On March 11, 2011, a great earthquake with Magnitude
9.0 hit North East Coast of Japan. Fortunately, JRR-3 wasunder regular inspection and no serious accidents or damages
were reported. However, the lifeline of Tokai Village area
was lost for more than two weeks, and it took more than twomonths before damage inspection of JRR-3 could be started.
As of May of 2015, JRR-3 has not restarted yet. General
User Programs of 2011 - 2014 were cancelled and that of2015 has been suspended so far. In order to compensate theFig. 2. The U.S.-Japan spectrometer, CTAX, installed at the cold guideline CG4, High Flux Isotope Reactor (HFIR), in Oak Ridge National
Laboratory. Members who contributed the relocation project of the
U.S.-Japan spectrometer celebrate the completion of the project in
October 2010.)

loss of the activity of NSL, a number of proposals acceptedin 2011 - 2014 were transferred to overseas owing to kindoffer from the major facilities, namely, ORNL, ILL, ANSTO,
and HANARO.
Research topics in FY2013 cover Hydrogen releasefrom Li alanates originates in molecular lattice instability(6G:TOPAN T1-3:HERMES), Direct observation of antiferromagnetic ordering in s electrons confined in regularnanospace of sodalite (5G:PONTA), SANS Studies on
Catalyst Ink of Fuel Cell (SANS-U), Neutron scatteringstudies of Ti-Cr-V bcc alloy with the residual hydrogen anddeuterium (AGNES). In addition, there are a variety of activities on fundamental physics, neutron beam optics, developments of neutron scattering techniques.
Progress of HRC spectrometer in FY2014 is the development of the magnetic field environment. We examineda performance test of a superconducting magnet on the
HRC goniometer. The magnetic field of 10 T was achieved
with normal operation of the related components in thestraying field. The magnitude of the field is the highest
record in J-PARC/MLF at present. By using radial collimator for the reduction of background scattering from
Aluminum supporting ring in the magnet, high-quality data
was collected. The magnet is now ready for the general user
program.
The NSL also 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 research interests. In 2010,
relocation of the U.S.-Japan triple-axis spectrometer, CTAX,
was completed, and it is now open to users (Fig. 2).
http://neutrons.ornl.gov/instruments/HFIR/CG4C/
The activity report on Neutron Scattering Research in
JFY2011 is given in NSL-ISSP Activity Report vol. 18 (2011),
http://quasi.issp.u-tokyo.ac.jp/actrep/actrep-18-2011/indexpub_vol18.html.

Fig. 1. The reactor of JRR-3. The eight neutron scattering instruments
are attached to the horizontal beam tubes in the reactor experimental
hall. Two thermal and three cold guides are extracted from the reactor
core towards the guide hall located to the left.

ISSP Activity Report 201431

International MegaGauss
Science Laboratory
The objective of this laboratory (Fig. 1) is to study thephysical properties of solid-state materials (such as semiconductors, magnetic materials, metals, insulators, superconducting materials) under ultra-high magnetic field conditions.
Such a high magnetic field is also used for controlling the
new material phase and functions. Our pulse magnets, atmoment, can generate up to 87 Tesla (T) by non-destructive
manner, and from 100 T up to 760 T (the world strongest as
an in-door record) by destructive methods. The laboratoryis opened for scientists both from Japan and from overseas,
especially from Asian countries, and many fruitful results are
expected to come out not only from collaborative research
but also from our in-house activities. One of our ultimate
goals is to provide the scientific users as our joint researchwith magnets capable of a 100 T, milli-second long pulses ina non-destructive mode, and to offer versatile physical precision measurements. The available measuring techniques now
involve magneto-optical measurements, cyclotron resonance,
spin resonance, magnetization, and transport measurements.
Recently, specific heat and calorimetric measurements arealso possible to carry out with sufficiently high accuracy.
Our standard non-destructive-type pulse magnets areenergized by single capacitor bank and can generate fields up
to 75 T for ordinary use. Their simple sinusoidal waveforms
are advantageous for precise and reliable measurements ofvarious physical properties. Several on-demand magnets
having irregular shapes and sizes are developed for someparticular experiments. We open six magnet cells for parallel
experiments and accept more than 50 research projects per
year in 2013.
A 210 MJ flywheel generator (Fig. 2), which is the world
largest DC power supply (recorded in the Guinness Book ofWorld Records) has been installed in the DC flywheel generator station at our laboratory, and used as an energy source oflong pulse magnets. The magnet technologies are intensively
devoted to the quasi-steady long pulse magnet (an order of
1-10 sec) energized by the giant DC power supply. The latest
long-pulse magnet can generate fields up to 36 T with its
pulse half-period of 1 sec.
Our interests cover the study on quantum phase transitions (QPTs) induced by high magnetic fields. Fieldinduced QPTs have been explored in various materials
such as quantum spin systems, strongly correlated electron
systems and other magnetic materials. Direct thermodynamic evidences of QPTs are obtained through magnetiza-

Fig. 1. Building view of the International MegaGauss Science Laboratory (C-building) at ISSP.

32

ISSP Activity Report 2014tion and recently developed caloric measurements. For some
QPTs, changes in symmetry at the transitions are sensitively
resolved through measurements of electric polarization or
optical imaging using a polarizing microscope. High resolution of electrical measurements realized the observationof quantum oscillations in high quality crystals throughmeasurements of electrical resistivity, contactless impedance,
and torque magnetometry.
Magnetic fields higher than 100 T can only be obtainedwith destructing a magnet coil, where ultra-high magnetic
fields are obtained in a microsecond time scale. Our destructive techniques have undergone intensive developments.
The project, financed by the ministry of education, culture,
sports, science and technology, is now in progress, and goal
is to generate 1000 T by the electromagnetic flux compression (EMFC) system (Fig. 3). The system which is unique to
ISSP in the world scale is comprised of a power source of 5
MJ main condenser bank and 2 MJ condenser bank and has
been accomplished its installation. Two magnet stations areconstructed and both are energized from each power source.
Both systems are fed with a 2 MJ condenser bank used for aseed-field coil, of which magnetic flux is to be compressed.
As an easy access to the megagauss science andtechnology, we have the single-turn coil (STC) systemcapable of generating the fields of up to 300 T by afast-capacitor of 200 kJ. We have two STC systems, one isa 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 using the H-type STC are available. On the other
hand, for very low-temperature experiments, a combinationof the V-type STC with a liquid helium bath cryostat is very
useful and the magnetization measurements at temperature
as low as 2 K can be performed up to 120 T with high precision.

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

Building C
Room
101-113

Alias

Type

Bmax

Pulse width
BorePower source

Applications

OthersElectro- Magnetic
Flux Compression

destructive

730 T

μs
10 mm

5 MJ, 40kV

Magneto-Optical
Magnetization

5K–
Room temperature

Horizontal
Single-Turn Coildestructive

300 T
200 T

μs
5 mm
10 mm

0.2 MJ, 50 kV

Magneto-Optical measurements
Magnetization

5 K – 400 K

VerticalSingle-Turn Coildestructive

300 T
200 T

μs
5 mm
10 mm

0.2 MJ, 40 kV

Magneto-Optical
Magnetization

2K–
Room temperature

0.9 MJ, 10 kV

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

60 T
Building C
Room
114-120

Building C
Room 121

Building K

40 ms
18 mm

Mid-Pulse Magnet Non-destructive
70 T

40 ms
10 mm

PPMS

Steady State

14 T

ResistanceHeat Capacity

MPMS

Steady State

7T

Magnetization

Non-destructive

87 T(2-stagepulse)

Short-Pulse
magnet85 T
Long-Pulse magnet Non-destructive

36 T

5 ms
10 mm

Lowest temperature
0.1 K

Down to 0.3 K

0.5 MJ, 20 kV

Magnetization
Magneto-Transport

2K –Room temperature

210 MJ, 2.7 kVResistance
Magneto-Calorimetry

2K –Room temperature

5 ms
18 mm
1s
30 mm

Independent
Experiment in 5 site

Table 1. Available Pulse Magnets, Specifications

Fig. 3. (Build. C) The building for the electro-magnetic flux
compression, generating over 700 T. 1000 T project started since 2010,
and finally condenser banks of 9 MJ (5 MJ + 2 MJ +2 MJ) as a main
system with the 2 MJ sub bank system for the seed field have been
installed, and completed in the year of 2014.

Fig. 4. Fig.4. A photo of the V-type single-turn coil equipped with
40 kV, (A:100+B:100=200 kJ) fast operating pulse power system.
Measurements are carried out from room temperature down to 2 K by aspecially designed cryostat.

ISSP Activity Report 201433

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 andwill have even greater impact on the field in the near future.
Center of Computational Materials Science (CCMS) is a
specialized research center for promoting computer-aided
materials science with massively parallel computers, suchas K-computer. The center also functions as the headquarters of Computational Materials Science Initiative (CMSI),
which is an inter-institutional organization for computational
science of a broad range of disciplines, including molecularscience, quantum chemistry, biological materials, and solidstate physics. ISSP made contracts with 9 universities and2 national institutes for supporting the activities of CMSI
in which nearly 100 research groups are involved. The
main purpose of CMSI is to establish a new community ofcomputational science in which researches from different
backgrounds work together on grand challenge problems,
thereby developing computational infrastructures (newalgorithms, coding styles, standard software packages, etc)
and inspire young scientists.
CCMS has a branch office in the RIKEN AICS buildingon the Port Island Kobe, where K-computer is located,for supporting CMSI researchers getting together at the
K-computer site to exchange ideas of computational science,fine-tune various applications software for the K-computer,and develop better contact with staff members of RIKEN,
the operating institute of K-computer. Another mission of theKobe branch of CCMS is to communicate with researchers
from other fields of computer science. (There are 5 major
fields in the HPCI strategic program of MEXT, “biology”,“materials and energy” (our field), “seismology, oceanography and meteorology”, “industrial applications”, and“high-energy physics and cosmology”.)
The following is the selected list of meetings organized
by CMSI and CCMS in SY2014:• “CMSI Hands-On: FU Tutorial”(Apr 28, Aug 18/2014, Kobe)• “CMSI Hands-On: Version Control System Tutorial”(May 30/2014, Kobe)• “CMSI Hands-On: ALPS Tutorial”(June 16/2014, Kobe)• “Workshop: Programming Techniques for K-Computer”(Jul 7-Jul 9/2014, Kobe)• “CMSI Hands-On: AkaiKKR Tutorial”(June 30/2014, Kashiwa)• “CMSI Division 1 Summer School”(Aug 18-Aug 22/2014, Biwako)• “CMSI Hands-On: GPGPU Computing with OpenACC
2.0” (Aug 28/2014, Hongo)• “Symposium: Collabration with National Experimental
Facilities” (Sep. 02, Akihabara)• “CMSI Hands-On: Rokko Tutorial”(Sep. 18/2014, Kobe)• “Workshop: Possibilities of Post-K Computing”(Sep. 28, Tokyo)• “CMSI Hands-On: OpenMX Tutorial”(Oct. 10/2014, Kobe)• “CMSI Hands-On: ALPS Tutorial”(Oct. 16/2014, Kashiwa)• “CMSI International Workshop 2014: Tensor Network
Algorithms in Materials Science” (Oct. 20-22/2014, Kobe)• “The 4th Symposium of CCMS”(Nov.12-14, Kashiwa)• “10sor Network Workshop”(Nov. 25/2014, Kashiwa)• “The 5th CMSI Symposium”(Dec.08-10/2014, Sendai)• “CMSI Hands-On: xTAPP Tutorial”(Dec. 12/2014, Kashiwa)• “CMSI Hands-On: feram Tutorial”(Dec. 17/2014, Kashiwa)• “CMSI Hands-On: modylas Tutorial”(Jan. 1/2015, Kobe)• “Workshop: Programming Techniques for K-Computer”(Feb. 4-6/2014, Kakegawa)• “CMSI Hands-On: SMASH Tutorial”(Feb. 16/2014, Kobe)• “International Workshop on New Frontier of Numerical
Methods for Many-Body Correlations --- Methodologies and Algorithms for Fermion Many-Body Problems”(Feb.18-21/2015, Hongo)• “CMSI Hands-On: OpenMX Tutorial”(Mar. 11/2015, Kashiwa)

Fig. 1. International Workshop on New Frontier of Numerical Methods for Many-Body Correlations, Feb.18-21/2015, Hongo

34

ISSP Activity Report 2014

Laser and Synchrotron Research Center(LASOR Center)
Laser and Synchrotron Research (LASOR) Centerstarted from October, 2012. LASOR Center aims to promotematerial sciences using advanced photon technologies at
ISSP by combining the “Synchrotron Radiation Laboratory” and “Advanced Spectroscopy Group”. These twogroups have long histories since 1980’s and have kept strong
leaderships in each photon science fields for a long timein the world. In the past several decades, the synchrotronbased and laser-based photon sciences have made remarkable progresses independently. However, recent progresses
in both fields make it feasible to merge the synchrotronbased and laser based technologies to develop a new direction of photon and materials sciences. In the LASOR Center,extreme laser technologies such as ultrashort-pulse generation, ultraprecise control of optical pulses in the frequency
domain, and high power laser sources for the generation ofcoherent VUV and SX light are intensively under development. The cutting edge soft X-ray beamline is also developed
at the synchrotron facility SPring-8.
LASOR center aims three major spectroscopic methods[ultrafast, ultra-high resolution, and operand spectroscopy]
by three groups [extreme laser science group, soft-X-ray
spectroscopy and materials science group, and coherent
photon science group], as illustrated in Fig. 2. Under thisframework, various advanced spectroscopy, such as ultra-

Fig. 1. Open ceremony of LASOR center on October 2012.

Fig. 2. Developments of advanced spectroscopy at LASOR center by
three groups

Fig. 3. Close look of a high-peak-power ultrashort-pulse laserhigh resolution photoemission, time-resolved, spin-resolved
spectroscopy, diffraction, light scattering, imaging, microscopy and fluorescence spectroscopy are in progress byemploying new coherent light sources based on laser andsynchrotron technologies that cover a wide spectral range
from X-ray to terahertz. In LASOR Center, a variety ofmaterials sciences for semiconductors, strongly-correlatedmaterials, molecular materials, surface and interfaces, andbio-materials are studied using advanced light sources andadvanced spectroscopy. Another important aim of LASOR
Center is the synergy of photon and materials sciences.
Most of the research activities on the extreme laser
development and their applications to materials science
are performed in the ISSP buildings D and E at Kashiwa
Campus where large clean rooms and the vibration-isolated
floor are installed. On the other hand, the experiments
utilizing the advanced synchrotron source are performed at abeamline BL07LSU in SPring-8 (Hyogo).
• Extreme Laser Science GroupThe advancement of ultrashort-pulse laser technologies
in the past decade has transformed the laser development
at ISSP into three major directions, (i) towards ultrashortin the time domain, (ii) ultra high resolution in the spectral
domain, and (iii) the extension of the spectral range, withextreme controllability of the laser sources. For ultrafast

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

ISSP Activity Report 201435

with sub-meV resolution-ARPES is improved drastically byusing high resolution laser. For examples, superconducting
gap anisotropy of the superconductors and Fermiology ofthe strongly correlated materials are studied very well. On
the other hand, using pulsed laser light, the time-resolved
photoemission in fs region becomes powerful to know therelaxation process of photo-excited states of the materials.
Furthermore, by using CW laser with circular polarization
in VUV region, the photoelectron microscopy (PEEM) isdeveloped. The spatial resolution of nm resolution is very
powerful for the study of nanomagnetic materials.

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

spectroscopy, we have developed carrier-envelope phasestable intense infrared light source that can produce sub-two
cycle optical pulses for high harmonic and attosecond pulse
generation. So far we observed coherent soft-X-ray radiation extending to a photon energy of ~330 eV. The simulation predicts the soft-X-ray field consists of single isolated
attosecond pulses. For ultra-high resolution spectroscopy,
fiber-laser-based light sources are intensively developed
for producing EUV pulses for high resolution and timeresolved photoemission spectroscopy as well as extending
the frequency comb to ultraviolet or infrared for various
applications. The spectral range of intense optical pulses arebeing extended from visible to IR, MIR and THz ranges.
Various types of high-repetition-rate ultrastable light sources
are developed for laser-based ultrahigh resolution photoemission spectroscopy, high-average-power EUV generation in
an enhancement cavity, and frequency comb spectroscopy
for atomic physics, astronomical application, and frequency
standards.

• Coherent Photon Science GroupThe coherent-photon science group has main interests in exploring a variety of coherent phenomena andnon-equilibrium properties of excited states in condensed
matters, in collaborations with research groups in chargeof photoemission, operand-spectroscopy and extreme laser
science. This group covers a wide range of materials, fromsemiconductors, ferromagnets, complexes and superconductors to biomaterials. Various ultrafast optics technologies
such as femtosecond luminescence and pump-and-probetransmission/reflection spectroscopy are applied to studies on
wavepacket dynamics, photo-induced phase transitions andcarrier dynamics. Coherent control and observation of spin
dynamics in magnetic materials and metamaterial structuresby using high power terahertz radiation source is extensively
studied. Advanced photonics devices are intensively studied,such as quantum nano-structure lasers with novel low-dimensional gain physics, low-power light-standard LEDs, very
efficient multi-junction tandem solar cells for satellite use,
and wonderful bio-/chemi-luminescent systems for widebio-technology applications.

• Soft-X-ray and Materials Science Group
Recently, VUV and SX lasers have progressed very
rapidly. They become very powerful for the materials
science using the cutting-edge VUV and SX spectroscopy.
Especially, angle resolved photoemission spectroscopy(ARPES) is very powerful to know the solid state properties.
Laser has excellent properties, such as coherence, monochromaticity, polarization, ultra-short pulse, high intensity, andso on. By using monochromatic laser light, the resolutionof ARPES becomes about 70-μeV. The materials scienceFig. 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. 6. Pump-probed photoemission system using 60-eV laser

36

ISSP Activity Report 2014

Synchrotron Radiation Laboratory
The Synchrotron Radiation Laboratory (SRL) was established in 1975 as a research division dedicated to solid statephysics using synchrotron radiation (SR). In 2006, the SRL
staffs have joined the Materials Research Division of the
Synchrotron Radiation Research Organization (SRRO) of
the University of Tokyo and they have played an essential
role in constructing a new high brilliant soft X-ray beamline,
BL07LSU, in SPring-8. The light source is the polarizationcontrolled 25-m long soft X-ray undulator with electromagnetic phase shifters that will allow fast switching of thecircularly (left, right) and linearly (vertical, horizontal) polarized photons.
The monochromator is equipped with a varied linespacing plain grating, which covers the photon energy range
from 250 eV to 2 keV. At the downstream of the beamline,
a lot of experimental stations have been developed forfrontier spectroscopy researches: five endstations, i.e. timeresolved soft X-ray spectroscopy (TR-SX) equipped witha two-dimensional angle-resolved time-of-flight (ARTOF)
analyzer (Fig. 1), three-dimensional (3D) nano-ESCA
station equipped with the Scienta R-4000 analyzer (Fig. 2),high resolution soft X-ray emission spectroscopy (XES)
stations (Fig. 3) are regularly maintained by the SRL staffs
and open for public use, and at free-port station many novel
spectroscopic tools have been developed and installed suchas soft X-ray resonant magneto-optical Kerr effect (MOKE)(Fig. 4) and soft X-ray diffraction (Fig. 5), ambient pressure
photoemission, two dimensional photoelectron diffraction and so on. The beamline construction was completed
in 2009 and SRL established the Harima branch laboratory
in SPring-8. At SPring-8 BL07LSU, each end-station has
achieved high performance: the TR-SX station have established the laser-pump and SR-probe method with the timeresolution of 50 ps which corresponds to the SR pulse-width;the 3D nano-ESCA station reaches the spatial resolution of
70 nm; the XES station provides spectra with the energy
resolution around 70 meV at 400 eV and will enable realambient pressure experiments in the near future. Soft X-ray
resonant MOKE station has been developed to conduct novel

Fig. 2. 3D-nano ESCA station

Fig. 3. Soft X-ray emission station

magneto-optical experiment using the polarization-controlled
25-m long soft X-ray undulator. The soft X-ray diffraction
station was connected to the beamline for the first time in
February, 2015, and is preparing for time-resolved diffraction
measurements. Each end-station has now been opened fully
to outside users. In 2014, 150 researchers made their experiments during the SPring-8 operation time of 3400 hours.

Fig. 4. Soft X-ray MOKE station

Fig. 5. Soft X-ray diffraction
stationFig. 1. TR-SX station

ISSP Activity Report 201437

Quantum Phase near the Saturation Fieldin the S=1/2 Frustrated Spin Ladder
H. Yamaguchi and T. Sakakibara
Frustration in spin systems suppresses conventional
magnetic orders and induces a variety of exotic quantum
phenomena. Much attention has recently been paid tofrustrated ferromagnets, in which ferromagnetic (FM) andantiferromagnetic (AFM) interactions strongly compete.
In these systems, magnons are expected to form multiple
bound states at high magnetic fields near the saturation
point, owing to attractive FM interactions. Theoreticalworks have suggested that correlations between the boundmagnons form a spin-multipolar (SM) phase and that asubsequent condensation brings about a hidden order of spin
multipoles in various spin systems. Among them, the spinnematic (quadrupolar) phase has been extensively studied
as a possible candidate of the Bose-Einstein condensationof two-magnon bound states, but there is currently no clear
experimental evidence of its realization. Regarding themacroscopic behavior, the magnetization curve is predicted
to show an anomalous change at the phase transition to thespin-nematic order near the saturation field [1].
Here, we report on a low-temperature study of the S=1/2
organic spin ladder 3-I-V [2], which we recently succeeded
in synthesizing and reported as a strong-leg spin ladder withFM leg interactions [3]. Ab initio molecular orbital (MO)calculations revealed that the low-temperature spin modelin 3-I-V can be regarded as a weakly coupled frustrated
spin ladder. Considering the magnetic and thermodynamic
properties, we strongly suggest that the observed low-field
phase and the phase near the saturation field are, respectively,a longitudinal spin-density-wave (SDW) order and a subsequent SM order like a spin-nematic phase.
The MO calculations indicate four kinds of additional
interactions excluding those forming the spin ladder. Considering those additional interactions, we found two types oftriangular units inducing frustration through the combinationof the signs of the interactions. One combination consistsof intraladder interactions Jleg, Jrung, and Jdiag, and the otherconsists of interladder interactions J1, J2, and J3, as shown in
Figs. 1(a)–1(c).
The temperature dependence of the magnetization

Fig. 2. Magnetic field vs temperature phase diagram showing the 3D
order phase and nontrivial phase near the saturation field. The circles,
triangles, and squares indicate the phase boundaries determined fromthe specific heat, the magnetic susceptibility, and the magnetization
curve, respectively.

indicates singular cusp-like extremes [2], originating from theBose-Einstein condensation of magnons. The specific heats
consistently exhibite sharp peaks at the temperatures corresponding to these features [2]. On the other hand, we found a
broad peak indicating two phase boundaries in the magnetic
field dependence of the specific heat at 0.2 K. We plotted
these temperatures in the magnetic field-temperature phase
diagram in Fig. 2. The obtained phase diagram suggests a
low-field three-dimensional (3D) order and a nontrivial phasenear the saturation field. Furthermore, we found nonmonotonic behavior of the field derivative of the magnetization
curve (dM/dB) near the saturation field [2], which suggests
the existence of an intermediate phase with large quantum
fluctuations just below the saturation field, as shown in Fig. 2.
We classified the low-field 3D ordered phase on the basisof the presence or absence of a successive phase transition.
There is no successive phase transition in the temperaturedependence of the specific heat for 3-I-V, while the corresponding curves for isomorphous 3-Cl-4-F-V and 3-Br-4F-V indicate successive phase transitions accompanied by
distinct double peaks. The absence of a successive phasetransition in 3-I-V strongly suggests an SDW order witha single-component order parameter along the field direction. The presence of the SDW phase definitely indicates theformation of multi-magnon bound states [1]. Hence, the SMorder is one possible explanation of the nontrivial phase near
the saturation field, where the magnetization curve indicateslarge quantum fluctuations. For 3-I-V, the enhanced frustration effect originating from the FM diagonal interaction isconsidered to stabilize multi-magnon bound states.
References[1] T. Hikihara, L. Kecke, T. Momoi, and A. Furusaki, Phys. Rev. B 78,
144404 (2008)[2] H. Yamaguchi, H. Miyagai, Y. Kono, S. Kittaka, T. Sakakibara,
K. Iwase, T. Ono, T. Shimokawa, and Y. Hosokoshi, Phys. Rev. B 91,
125104 (2015)[3] H. Yamaguchi, H. Miyagai, T. Shimokawa, K. Iwase, T. Ono,
Y. Kono, N. Kase, K. Araki, S. Kittaka, T. Sakakibara, T. Kawakami,
K. Okunishi, and Y. Hosokoshi, J. Phys. Soc. Jpn. 83, 033707 (2014).

Fig. 1. (a) Frustrated spin ladder formed by Jleg, Jrung and the additional
Jdiag for 3-I-V. The 3D lattices connected by the interladder interactions
J1, J2, and J3 viewed along (b) the leg and (c) the rung directions for
3-I-V. The shadowed plane in each figure shows one of the interladder
triangular units, causing frustration.

38

ISSP Activity Report 2014

Authors
H. Yamaguchia, H. Miyagaia, Y. Kono, S. Kittaka, T. Sakakibara,
K. Iwasea, T. Onoa, T. Shimokawab, and Y. HosokoshiaaOsaka Prefecture Universityb
Osaka University

Magnetic Ordering in the Ising Frustrated
Spin-Chain Magnet NaCo(acac)3benzene
Y. Karaki, S. Nakatsuji, and Y. Uwatoko
Geometrical frustration in antiferromagnets has attracted
much attention in recent years. The geometrical frustration
destroys the conventional Néel state and tends to produce
an exotic magnetic phase. Ising spin system with antiferromagnetic nearest-neighbor interactions on a triangular lattice
is a simple frustrated system. A partially disordered antiferromagnetic (PDA) phase is a typical example of such exotic
phases. [1]A series of metal chelate compounds having the formula
MIMII(acac)3benzene, where acac represents acetylacetonate,
MI is Na+ or K+ and MII is divalent metal ion surroundedby the octahedron of oxygen atoms, have a trigonal crystal
structure belonging to the space group P-31c with a =10.24 Å and c = 11.95 Å [2]. Since the divalent metal ionsform a hexagonal lattice, these compounds are possible
candidates for studying the frustration on the triangularlattice.
Here we report on the results of the susceptibility(χ),
magnetization and specific heat measurements using single
crystals of NaCo(acac)3benzene [2]. ESR and χ measurements (T>2 K) show that Co2+ of NaCo(acac)3 benzene has
the anisotropic g-factor gc= 8.12 and gperp= 1.41 for fictitious spin S=1/2. Figure 1(a) shows the temperature dependence of DC χ parallel to the c-axis at H= 5.0 Oe. The inset
shows the inverse of AC χ(T) of a needle-shaped sample.
Figure 1(b) shows the specific heat at zero field and DC χ at
low temperatures. A long range ordering accompanied witha sudden increase of χ appears around 62 mK. Figure 2(a)shows the magnetization curve. Below 60 mK an anomalyof the M-H curve appears. A step-wise change of the magnetization becomes clear at 20 mK. At H~ 300 Oe the magnetic
moment aligns fully with applied field. The plateau at 1/3 offull moment suggests a ferrimagnetic alignment of the ferromagnetic chains. The ferromagnetic intra-chain interaction
JC/kB= -0.2 K and the antiferromagnetic inter-chain interaction J/kB = 0.05 K are deduced from the Weiss temperature
20 mK and the critical field 300 Oe. These results confirm
the 1-D nature of NaCo(acac)3benzene. When a 1-D shortrange order is well developed at low temperatures, eachchain behaves like a magnetic moment and thus a magnetic
ordering with two-dimensional character is expected. The
mean field theory of a triangular Ising lattice predicts a steplike increase of χ at Tc from a paramagnetic phase to a PDA
phase and no anomaly at Tc from the paramagnetic phase to
the ferrimagnetic phase [2]. Thus the observed χ anomaly

Fig. 1. (a) Temperature dependence of DC χ (FC) and differential χ
obtained from M-H curves. M-H curves are measured after zero fieldcooling. The inset shows the inverse of AC χ (220 Hz) of a needleshaped sample at T> 200 mK. (b) Temperature dependence of thespecific heat at zero field and DC χ at 5.0 Oe below 160 mK.

Fig. 2. (a) Magnetization curve for H// c at 20mK, 57mK, 65 mK and
105 mK. (b) Temperature dependence of the spin relaxation time.

at 62 mK suggests the existence of the PDA phase aroundzero field. At the PDA phase, two thirds of chains order into
an antiferromagnetic alignment and the resultant chain is
incoherent with other chains. Since the molecular fields ofthe incoherent chain are canceled, the magnetic response of
single chain is expected in the PDA phase. Figure 2(b) shows
temperature dependence of the spin relaxation time obtained
from the frequency dependence of AC χ. The thermal activation process with the gap energy Δ/kB= 1.2 K is observed.
However, obtained gap energy is about 6 times larger thanestimated value using Δ=4S2Jc given by Glauber for a ferromagnetic Ising chain [3]. The simple chain model in the
PDA phase cannot explain the observed spin relaxation wellenough. Further microscopic measurements are necessary to
clarify the ordered phase and the spin relaxation mechanism.
References[1] M. Mekata, J. Phys. Soc. Jpn. 42, 76 (1977).
[2] Y. Karaki, K. Kuga, K. Kimura, S. Nakatsuji , K. Matsubayashi, andY. Uwatoko, submitted to J. Phys. Soc. Jpn.
[3] R. J. Glauber, J. Math. Phys. 4, 294 (1963)
Authors
Y. Karakia, K. Kugab, K. Kimurab, S. Nakatsuji , K. Matsubayashi, andY. UwatokoaUniversity of the Ryukyusb
Osaka University

Trivial Yet Distinct
Y. Fuji, F. Pollmann, and M. Oshikawa
Classification of quantum phases is a central subject
in statistical mechanics and condensed matter physics.
Traditionally, it was based on the notion of spontaneous
symmetry breaking, as initiated by Landau. However,recently, a rich variety of quantum phases without any
spontaneous symmetry breaking has been recognized. This
also requires us to develop new concepts and formulations. One of the novel classes of quantum phases is called
Symmetry-Protected Topological (SPT) phases. As the namesuggests, they are distinct from the trivial phase only in thepresence of an appropriate symmetry. In this regard, SPTphases are similar to the conventional ordered phases with aspontaneously broken symmetry. However, SPT phases do
not break the symmetry, and hence are called topological.
A well-known example of SPT phases is the topologicalinsulator, which possesses a helical edge state and is distinct
from a trivial band insulator. The helical edge state andthe distinction from a trivial band insulator however goaway once the time-reversal symmetry is broken explicitly.
Another example of SPT phases is Haldane phase in S =1

ISSP Activity Report 201439




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Fig. 1. Divergence of the correlation length demonstrating the existenceof the quantum phase transition separating the two trivial phases. Insets
show the non-local string order parameter which distinguishes the twophases.

antiferromagnetic chains. There is no long-range orderwhich can be detected by a local order parameter inthe Haldane phase. Nevertheless, the Haldane phase is
separated by a quantum phase transition from a trivial
phase such as “large-D phase” which includes the productof Sz =0 states. The Haldane phase also has a characteristics of edge state (free spin), which is protected by thetime-reversal symmetry. It turns out however that theedge states are not the most general characterization of
SPT phases. Under the lattice inversion symmetry, there
are topological insulator and Haldane phase without any
physical edge state. These are most generally characterized by degeneracy in the entanglement spectrum.
This implies that they are distinct, in the presence ofthe symmetry, from a trivial product state without any
entanglement.
In a recent joint research [1] we demonstrated that thenotion of symmetry protection of quantum phases can begeneralized in a somewhat surprising manner. In the standard
SPT phases, as we discussed above, there is a nontrivial
entanglement which makes the state distinct from a trivial
product state. We showed that, in the presence of a certainclass of inversion symmetry, there are two trivial phasesthat are still distinct, in a simple model of S =1 chain. By“trivial phase” we mean the ground state can be adiabaticallyconnected to a product state where there is no entanglement
at all. Nevertheless the two trivial phases are distinct in thesense that they are always separated by a quantum phasetransition as long as the symmetry is kept. We dubbed them
“Symmetry-Protected Trivial (SPt)” phases. We have also
formulated a non-local string order parameter which candistinguish these phases and detect the quantum phase transition between them. So, there is something nontrivial even intrivial phases! This would also add a new aspect to the fundamental question “What is phase?”.
This work was performed in collaboration between ISSP
and Max-Planck Institute for Physics of Complex Systems,
which is recently strengthened by the JSPS Strategic International Networks Program No. R2604 “TopoNet.”
Reference[1] Y. Fuji, F. Pollmann, and M. Oshikawa, Phys. Rev. Lett. 114,
177204 (2015).

40

ISSP Activity Report 2014

Y. Noguchi, M. Hiyama, and N. Koga
These days the first-principles simulations are commonlyused as a basic tool for the material research. Most of thesimulation programs have been designed for the groundstate only, while excited states are the target of increasing
number of spectroscopic measurements demanding thereby
the program to cover the excited states. Recently, Noguchi,
Hiyama and Koga have shown such extension is possible
with the first-principles two-particle Green’s function
program.
The program has been developed by Noguchi on the basisof the Bethe-Salpeter equation (BSE) combined with the GW
approximation (GWA) to the self-energy operator, and the
problem originated from the extremely large computational
requirement has been overcome by the development of theparallel programming. Thus the remaining problem is totest the accuracy of the program by comparing with reference data and convince it to the users of the first-principles
program. In this context, the authors focused on recently
synthesized nanomaterials, or the fullerene containing alkali
metal inside and a carbon material called warped nanographene, which are extraordinarily suitable for the benchmark. By comparing the measured and calculated spectra,
reliability of the GW-BSE calculation was shown [1, 2].
More stringent test was done for the core-excitation
spectrum of a molecule [3], which so far has been calculatedusing the density functional theory together with empiricalFig. 1. Comparison of the calculated (bottom) and the measured (top)
XAS spectra for benchmark molecules, acetone (left) and acetic acid(right). Using the first-principles Green’s function scheme, the excitation energy from the oxygen 1s state to the valence states was calculated for the first time without empirical parameters. The calculated
excitation energies are in agreement with experiments within the errorof 1 %, or 2-5 eV. This demonstrates that theory is able to provide
reliable data that will help analyzing the measurements.

adjustments. By the comparative study, the authors demonstrated that x-ray absorption spectra (XAS) can be reliably
assigned fully from first-principles using the program (seeFig. 1).
So far, the program was also applied to other materials
such as the firefly liciferin, or the light-emitting compoundfound in firefly species, to understand the light-emitting
mechanism [3]. The GW-BSE program is planned to open
to ISSP supercomputer users and is expected to advance ourunderstanding of the excited states of materials.
References[1] Y. Noguchi, O. Sugino, H. Okada, and Y. Matsuo, J. Phys. Chem. C
117, 15362 (2013).
[2] Y. Noguchi and O. Sugino, J. Chem. Phys. 142, 064313 (2015).
[3] Y. Noguchi, M. Hiyama, H. Akiyama, N. Koga, J. Chem. Phys. 141,044309 (2014).
[4] Y. Noguchi, M. Hiyama, H. Akiyama, Y. Harada, and N. Koga,
J. Chem. Theor. Compt. 11, 1668 (2015).
Authors
Y. Noguchi, M. Hiyama, and N. KogaaaNagoya Univerisy

Dephasing in Single-Electron Generation
Due to Environmental Noise Probed byHong-Ou-Mandel Interferometry
E. Iyoda, T. Kato, K. Koshino, and T. Martin
Quantum mesoscopic physics, or nanophysics, aims at
studying the manifestations of quantum mechanics, such as
interference effects and coherence, with electron transport incondensed matter materials. Such manifestations have beenstudied in the context of quantum optics since the middleof the past century, where fundamental tests of quantum
mechanics were explored, for instance, in Hanbury Brown
and Twiss [1] (HBT) and Hong-Ou-Mandel [2] (HOM)
experiments for photons. The fermionic counterpart of the
HOM experiment has been realized quite recently in a setup
of a two-electron collider using a quantum point contact(QPC) and two single-electron generators composed ofinteger quantum Hall edge states and quantum dots [3] (see aschematic figure in Fig. 1(a)). In the fermionic HOM experiment, if two electrons arrive at the QPC simultaneously,
the two electrons always scatter into two different output
channels because of their fermionic statistics.
In condensed matter settings, the two electrons arealways accompanied by the Fermi sea, and as charged
particles they interact strongly between themselves and with
their environment. The coherence of injected electrons is
directly measured by perfectness of anti-correlated scatteringin the fermionic HOM experiment. The imperfect anticorrelated scattering reported in [3] includes information
about the distinguishability of propagating electrons in thechiral edge channels before arriving at the QPC. At present,
the dephasing of propagating electrons has been discussed
mostly by considering Coulomb interactions between
electrons. The origin of electron decoherence has, however,
not yet been determined experimentally. We have examinedthe effect of electron decoherence by focusing on the role ofthe energy-level fluctuations of the quantum dot due to thisenvironment [4].
We have employed a simple analytic framework for

Fig. 1 (a) A schematic figure of the Hong-Ou-Mandel-type two-electron
collision experiment. Two electrons injected from two quantum dots
propagate along edge states of integer quantum Hall states, and collides
at a central quantum point contact (QPC). (b) The probability 1-P(Δt),
that two electrons scatter into the same edge states, is plotted as afunction of a wavepacket delay time Δt. Two electrons always scatter
into difference edge states (1-P(Δt) = 0) when Δt = 0 and γp = 0. On theother hand, as the dephasing rate γp increases, the probability 1-P(Δt) at
Δt = 0 increases, and approaches the classical value.

evaluating the current noises reflecting electron indistinguishability based on the so-called input-output relation,
which is a standard theoretical tool in quantum optics. In
this approach, the dephasing rate γp due to energy-level
fluctuations is easily taken into account in the model Hamiltonian. In order to clarify coherence of generated electrons,
we have calculated P(Δt) = Tr(ρ(t)ρ(t+Δt)), where ρ(t) isa density matrix of injected electrons and Δt is the timedelay between the two emitted electron wave packets (seeFig. 1(a)), and have obtained an analytic solution, P(Δt) =1/(1+ γp / Γ) exp(- Γ | Δt | ) where Γ is the decay time ofelectron generators. Figure 1(b) shows a plot of 1-P(Δt),
which is proportional to the excess current noise measured
at one of the output channels, assuming a balanced transmissivity of QPC. If there is no dephasing (γp = 0), theexcess noise is completely suppressed for the simultaneous collision (Δt = 0) between injected electrons. This is
the manifestation of the Fermi statistics of the injected
electrons. As the pure dephasing rate γp increases, the dipof the current noise is reduced and vanishes for γp >> Γ. We
note that P = P(0) corresponds to the purity P = Tr(ρ2) of
injected electrons, which has the simple form in our case:P = Γ / (Γ+ γp). The purity approaches 1 for γp << Γ, leading
to a perfect suppression of the excess noise.
In our work [4], we have also shown that the time
filtering technique helps to enhance the purity, and that ageneralization of the present results to an asymmetric setup
is possible, with possible implication for measuring theenergy detuning of the two injectors in actual experiments.
Our calculation provides a useful and comprehensive pictureof dephasing effects on the quality of generated single
electrons as well as compact formulas for the purity and thecurrent noises in the HOM experiment.

ISSP Activity Report 201441

References[1] R. H. Brown and R. Q. Twiss, Proc. R. Soc. A 242, 300 (1957).
[2] C. K. Hong, Z. Y. Ou, and L. Mandel, Phys. Rev. Lett. 59, 2044
(1987).
[3] E. Bocquillon et al., Science 339, 1054 (2013).
[4] E. Iyoda, T. Kato, K. Koshino, and T. Martin, Phys. Rev. B 89,
205318 (2014).
Authors
E. Iyodaa, T. Kato, K. Koshinob, and T. Martinca
University of Tokyob
Tokyo Medical and Dental Universityc
Aix Marseille Université, CNRS, CPT

Electrical Conduction in Epitaxial
Graphene on Stepped Substrateof Vicinal SiC Surface
A. Endo, F. Komori, and S. Tanaka
Two-dimensional electron system (2DES) in graphene,
i.e. a single or a few layers of graphitic sheet, has attracted
much interest on account of its properties quite distinct
from conventional 2DES. Graphene samples are typically
produced either by “peel-and-stamp” technique or by
epitaxial growth on appropriate substrates. In this study[1]monolayer graphene was grown on a vicinal surface of
6H-SiC(0001) which has a quasi-regular step-and-terrace
structure as shown in Fig.1. This is analogous to 2DES in a
GaAs/AlAs quantum well fabricated on the (775)B surfaceof GaAs [2].
Electrical conduction under a magnetic field normal tothe plane showed a high degree of anisotropy. The quantum
Hall effect (QHE) with zero resistance manifests itself for thecurrent along the steps as shown in Fig.1, whereas the QHE
is obscured by pronounced positive magnetoresistance withquadratic magnetic-field dependence for the current acrossthe steps. The latter, as well as the small slope of the Hall
resistance, implies the presence of parallel conduction due

Fig. 2. Low field magnetoconductance with current along the steps
exhibits oscillatory behavior superposed on the positive magnetoconduction attributable to the weak localization effect. The vertical dashedlines marked by arrows represent the expected positions of open orbit
geometrical resonance.

to remnant carriers in the SiC substrate, albeit with seeminginconsistency with the zero resistance observed for theformer current direction. The anisotropic behavior is interpreted by assuming that the parallel conduction is sizable
along the steps but is virtually prohibited across the steps
Conspicuous negative magnetoresistance in low fieldregime can be analysed by the weak localization formula.
The phase relaxation time τø thus obtained is on the order ofa few psec, which considerably exceeds the transport relaxation time τ~10-2 psec. The conductance along the steps isfound to exhibit small-amplitude oscillations as shown in
Fig. 2, after subtracting out the large positive magnetoconductance of the weak localization origin. This oscillatory
behavior is attributed to open-orbit geometrical resonanceeffect previously elucidated in a GaAs/AlGaAs 2DES
subjected to a unidirectional potential modulation [3].
References[1] A. Endo, F. Komori, K. Morita, T. Kajiwara, and S. Tanaka, J. Low
Temp. Phys. 179, 237 (2015).
[2] Y. Iye, A. Endo, S. Katsumoto, Y. Ohno, S. Shimomura, and S.
Hiyamizu, Physica E 12, 200 (2002).
[3] A. Endo and Y. Iye, Phys. Rev. B 71 081303(R) (2005).
Authors
A. Endo, F. Komori, K. Moritaa, T. Kajiwaraa, and S. TanakaaaKyushu University

Methylation of Epitaxial Grapheneon SiC(0001) through Two-Step
Chlorination Alkylation Reactions
Md. Z. Hossain and J. Yoshinobu

Fig. 1. Epitaxial monolayer graphene grown on a vicinal surface of
6H-SiC(0001) which has a regular step-and-terrace structure. Resistance along the step exhibits negative magnetoresistance characteristicof weak localization at low field and well-developed quantum Hall
effect (ν=2) at high field.

42

ISSP Activity Report 2014

Chemical modification of graphene with varieties offunctionalities is vital for anticipated applications suchas sensing, detecting, and composite material systems.
However, it is not easy to chemically graft the atoms or
molecules onto the graphene surface because of the bonding
nature of sp2 C atoms in graphene. Therefore, it is highly
desirable to establish a common chemical approach throughwhich the pristine graphene can be modified with varietiesof chemical species. In this joint research, we demonstrate
the covalent binding of a methyl group on the basal planeof epitaxial graphene on SiC(0001) through the two-step
chlorination and alkylation processes using a Grignard
reagent (CH3MgBr). The modified surfaces are characterized
by scanning tunneling microscopy and spectroscopy, X-ray
photoelectron spectroscopy (XPS) and Raman spectroscopy.
Figure 1a is an atomic resolution STM image ofmonolayer epitaxial graphene (EG) on SiC(0001). The
hexagonal networkof—— the graphene lattice is clearly seen
over the 6√ 3 × 6√ 3 substrate structure. The chlorination of EG was done by exposing the surface to Cl2 under
UV light in N2 atmosphere. Following the chlorination ofgraphene, the atomically resolved high-resolution image
clearly reveals that the EG contains a large number of small
protrusions (Figure 1b). Since the graphene mesh and underlying substrate periodicity are still visible, we ascribe these
additional small protrusions to the chemisorbed Cl atoms on
EG. Note that the surface morphology shown in Figure 1b
is only seen in the monolayer EG region. Figure 1c showsa typical STM image; the hexagonal mesh of the graphenelattice is clearly visible in the lower half of the image, andthe upper half contains randomly distributed protrusions
ascribed to the chemisorbed Cl. The approximate surface
coverage of chemisorbed Cl is estimated to be ~ 8 atom%.
Based on the atomic resolution STM and Raman measurements on the different areas of the surface, we conclude thatchemisorption of Cl is selective to the monolayer EG on SiC.
The covalent binding of Cl onto the EG is confirmed by
the XPS spectra as shown in Figure 1d. The Cl 2p and Cl
2s peaks are observed in the XPS spectrum for chlorinatedgraphene (Fig. 1d(ii)). The high-resolution Cl 2p spectrum
exhibits two components at 200.2 and 201.8 eV (Fig. 1e).
When the chlorinated EG is treated with CH3MgBr in THF,
the Cl peaks disappear [Figure 1d(iii), e(iii)] and the heightof the C 1s peak slightly increased [Figure 1d(iii)] comparedto that of the chlorinated surface. The absence of any Mg or
Br peaks in the wide range spectra suggests the clean EG
modified with only the C containing group. The STM investigations of CH3MgBr treated surfaces indicate that only
the monolayer graphene regions contain small protrusions
randomly distributed over the surface. The density of small
protrusions is similar to that of the respective chlorinatedFig. 1. Typical ambient STM images of (a) the clean epitaxial grapheneon the Si-face of the SiC substrate and (b) the same surface after chlorination. (c) Chlorinated and non-chlorinated areas within the samescanning area. (d) Wide range XPS spectra of (i) clean, (ii) chlorinated,and (iii) chlorinated surface treated with CH3MgBr in THF (tetrahydrofuran) for 2 h at 65 °C. hν = 1486 eV. (e) High-resolution Cl 2p XPS
spectra of (i) clean, (ii) chlorinated, and (iii) chlorinated surface treatedwith CH3MgBr in THF. hν = 410 eV. (f) Atomic resolution STM imageof the chlorinated surface treated with CH3MgBr. Vtip = 0.5 V; Itunnel =0.5 nA. [© 2014 American Chemical Society]Fig. 2. Schematic of the reaction steps for photochlorination andmethylation of epitaxial graphene on SiC using CH3MgBr in THF. [©
2014 American Chemical Society]surface. A typical atomically resolved STM image of theCH3MgBr treated surface is shown in Figure 1f. In addition
to the small protrusions, we can clearly see the underlying
hexagonal mesh of graphene in Fig. 1f. These small protrusions are found to be stable even after annealing the surface
at 300 °C in UHV. Since the surface is free from any othercontamination as revealed by XPS, we ascribed these small
protrusions to the covalently bonded CH3 groups.
The scheme for the present two-step reactions is summarized in Fig. 2, and the detailed analysis of experimental data
and discussion is found in reference 1.
Reference[1] Md. Z. Hossain, M. B. A. Razak, H. Noritake, Y. Shiozawa,
S. Yoshimoto, K. Mukai, T. Koitaya, J. Yoshinobu, and S. Hosaka,
J. Phys. Chem. C 118, 22096 (2014).
Authors
Md. Z. Hossain, M. B. A. Razak, H. Noritake, Y. Shiozawa,
S. Yoshimoto, K. Mukai, T. Koitaya, J. Yoshinobu, and S. Hosaka

Imaging of Josephson Vortices
on Surface Superconductor by
Scanning Tunneling Microscopy
T. Uchihashi, X. Hu, and Y. Hasegawa
The recent discovery of superconductivity in siliconsurface reconstructions with metal adsorbates was an
unexpected surprise, and as an ultimately thin 2D superconductor extensive studies on their properties are in progress[1-4]. One ubiquitous feature of these systems is the presenceof atomic steps, which may strongly affect electron transport there. Recent direct electron transport measurements
indicated that atomic steps work as Josephson junctions [2].
Nevertheless, direct evidence of Josephson coupling has notbeen obtained yet, and possible local variation of its strength
has remained an open issue.
Here, we report on compelling evidence of the Josephson
coupling at— atomic— steps on the surface superconductor
Si(111)-(√ 7 × √ 3 )-In [5]. Zero-bias conductance (ZBC)
images, which correspond to a mapping of the density ofstates (DOS) at the Fermi level, taken with a low-temperaturescanning tunneling microscopy (STM) reveal that vortices
are present at atomic steps after magnetic fields are applied.
Elongated shapes and significant recovery of superconductivity within their cores, which are characteristic toJosephson vortices (JV), are clearly observed in the images.
Figure 1(a) shows an STM image with an area of
500 nm×1500 nm. The surface consists of flat terraces
separated by single atomic height steps. ZBC images takenon the same area under magnetic fields of 0.08, 0.04, 0 T aredisplayed in Figs. 1(b)-1(d). The imagings were performed

ISSP Activity Report 201443

ts / t = 1; its magnitude around the center is decreased as
ts / t is reduced, while the spatial distribution becomesstrongly elliptic, which directly corresponds to the observedchanges for vortices A', B', and C' in Fig. 1(d). From thecomparison of the experiment and the theory, Jc / J0 is
estimated to be ~ 0.4 for step γ where vortex B' is located.
Because of a weaker coupling at step δ, vortex C' can besafely called a JV.

——
Fig. 1. (a) Large-scale STM image of Si(111)-(√ 7 × √ 3 )-In surface,where the terraces are separated by atomic steps marked as α, β, γ, andδ from top to bottom. (b)-(d) ZBC images taken under magnetic fieldsof (b) 0.08 T, (c) 0.04 T, (d) 0 T. The positions of the atomic steps are
depicted by thin solid lines. (e) Spatial profiles of ZBC plotted along
the thick solid lines shown in (c) and (d). (f) and (g) numericallyobtained spatial profile of the zero energy DOS for the hopping strength
ts / t = 0.4 and 0.1, respectively. The dashed lines indicate the place
where the Josephson coupling was modeled.

below 0.5 K, which is sufficiently lower than Tc ≈ 3 K of thesuperconducting surface. At 0.08 T, round vortices formed aclosely packed triangular lattice within each terrace. Reduction of the magnetic field to 0.04 T decreased the numberof vortices as expected. When the magnetic field was set
to zero, vortices disappeared from the terraces, but slightly
bright regions remained along the steps [Fig. 1(d)]. Note thatsimilar features were also present along the steps at finite
fields [Figs. 1(b) and 1(c)]. They are not simply regions
where superconductivity is suppressed due to the presenceof steps because the features change their positions under
different magnetic fields, as seen from A and A'. Theseobservations clearly show that these bright features arevortices trapped at the atomic steps.
The vortices at steps are anomalous compared to thevortices on terraces. First, their shapes are elongated along
the steps whereas the vortices on terraces are round. Second,
ZBC values measured at the centers are lower than thoseof the vortices on terraces, as quantitatively depicted inFig. 1(e). These anomalies are the direct consequences of JV
and show that the atomic steps work as Josephson junctions.
Suppose that a vortex is created by penetration of themagnetic field through a Josephson junction line and its
surrounding region. At the junction, the critical current
density Jc is suppressed from that of the superconducting
regions J0. This leads to two important properties regarding
the vortex [6]. First, the circulation of supercurrent near thecenter is strongly deformed and the vortex core is elongatedalong the junction line by a factor of (Jc / J0)−1. Second, thebreaking of superconductivity around the core is weakened
as Jc / J0 decreases. When the supercurrent distribution near
the junction line is nearly parallel and the suppression is
sufficiently small, the vortex should be called a JV, like thecase of layered superconductors under magnetic field parallelto the layers [7].
To ensure this picture, we numerically calculated
the order parameter and DOS using the Bogoliubov-deGennes (BdG) equation for a 2D tight-binding model withthe hopping strength ts at the Josephson junction reduced
from a constant hopping strength t elsewhere. Then theJosephson parameter J c / J 0 is represented by the ratiots / t. Figures 1(f) and 1(g) display zero-energy DOS calculated for ts / t = 0.4 and 0.1, respectively. The characteristics of zero-energy DOS are different from the case of

44

ISSP Activity Report 2014

References[1] T. Zhang et al., Nat. Phys. 6, 104 (2010).
[2] T. Uchihashi, P. Mishra, M. Aono, and T. Nakayama, Phys. Rev.
Lett. 107, 207001 (2011).
[3] M. Yamada, T. Hirahara, and S. Hasegawa, Phys. Rev. Lett. 110,
237001 (2013).
[4] C. Brun et al., Nat. Phys. 10, 444 (2014).
[5] S. Yoshizawa, H. Kim, T. Kawakami, Y. Nagai, T. Nakayama,
X. Hu, Y. Hasegawa, and T. Uchihashi, Phys. Rev. Lett. 113, 247004(2014).
[6] G. Blatter, M. V. Feigel’man, V. B. Geshkenbein, A. I. Larkin, andV. M. Vinokur, Rev. Mod. Phys. 66, 1125 (1994).
[7] P. J. W. Moll, L. Balicas, V. Geshkenbein, G. Blatter, J. Karpinski,
N. D. Zhigadlo, and B. Batlogg, Nat. Mater. 12, 134 (2013).
Authors
S. Yoshizawaa, H. Kim, T. Kawakamia, Y. Nagaib, T. Nakayamaa,
X. Hua, Y. Hasegawa, and T. UchihashiaaInternational Center for Materials Nanoarchitectonics, National
Institute for Materials Scienceb
CCSE, Japan Atomic Energy Agency

Silver Oxide Clathrate Thin Films
Y. Matsumoto, R. Takahashi, and M. Lippmaa
We have studied the possibility of growing epitaxial
films of silver clathrates on single-crystal oxide substrates byphotoelectrochemical deposition. The clathrates chosen forthis study were Ag7O8NO3 and Ag7O8HSO4. Both materials
consist of a cubic lattice of Ag6O8 cages that enclose either
NO3 or HSO4 anions, as illustrated in Fig. 1(a). Silver clathrates have various interesting properties; Ag7O8NO3, forexample, becomes superconducting at 1 K. Our purpose wasto develop a technique for fabricating epitaxial clathrates
with well-defined orientation on a single-crystal substrate.
Silver clathrates contain Ag ions in several valence states,
including Ag+, Ag2+, and Ag3+, which means that strongly
oxidizing synthesis conditions are needed. One possibility
is to use photoelectrochemical deposition on a metallic
substrate under a suitable substrate bias in either AgNO3 or
Ag2SO4 solution. Growth experiments on 0.5 wt% Nb-doped
TiO2 substrates showed that the best selectivity for clathrate

Fig. 1. (a) Structure of Ag7O8NO3 silver clathrate crystals that consistof a cubic lattice of Ag6O8 cages that enclose NO3 anions. (b) SEM
image of epitaxial (111)-oriented Ag7O8NO3 platelets photodeposited
on a TiO2(110) substrate surface in a AgNO3 solution at an electrodepotential of +0.3V vs Ag.

formation can be obtained at a bias of +0.2V vs. Ag. The
necessary photoexcitation was provided by a high-pressure
mercury lamp at a flux of 28 mW/cm2. X-ray diffraction
analysis showed that the best orientation control could beachieved on TiO2 (110) substrates, yielding micrometer-scale
epitaxial platelets, shown in a scanning electron microscope
image in Fig. 1(b). It is clear from the image that the platelets
tend to assume a hexagonal shape, characteristic of (111)oriented growth. The growth habit and epitaxial relationship were further studied by x-ray diffraction and epitaxial
relationships were found.
The reason for the preferential formation of epitaxial
clathrate crystals on TiO2 (110) surfaces was analyzed interms of lattice matching between the clathrate Ag6O8 cage
pseudo lattice and the TiO2 surface. The (110)-oriented TiO2
surface has a tetragonal structure where the spacing between
adjacent bridging oxygen rows is 6.495 Å. This distancematches reasonably well the clathrate cage spacings of
6.056 Å, when the clathrate lattice is viewed along the(111) direction. It appears that despite the 6% mismatch, anepitaxial relationship is formed during platelet growth. The
growth mechanism is thus somewhat similar to the formationof C60 films on crystalline substrates, although the growth ofa hexagonal (111)-oriented lattice on a tetragonal surface isunusual.
Various different anions can be integrated in the clathrate lattice. We compared the growth habit and growth ratesof silver clathrates containing the HNO3 and HSO4 anions
and found that while the growth rate of Ag7O8HSO4 wasmuch higher than for Ag7O8NO3, the epitaxial relationshipwas weaker. Since the lattice parameter of the clathrates ispredominantly set by the size of the Ag6O8 cages, it appears
that the formation of large epitaxial platelets is limited byother factors, with variable anion incorporation kinetics in
the Ag6O8 cages being the most likely reason. This work
showed that epitaxial growth of inorganic cage compounds
is possible when commensurate matching between the cage
pseudo lattice and a single-crystal substrate occurs.
Reference[1] R. Tanaka, R. Takahashi, S. Takata, M. Lippmaa, and Y. Matsumoto,
CrystEngComm 17, 3701 (2015).
Authors
R. Tanakaa, R. Takahashi, S. Takataa, M. Lippmaa, and Y. Matsumotoa,baTokyo Institute of Technologyb
Tohoku University

Vortices of Superfluid 3He
in a Narrow Cylinder
O. Ishikawa and T. Kunimatsu
Vortices are well known fluid phenomena, whose size
is widely distributed from the scale of a galaxy to that ofwater vortices in a laundry machine. The vortices familiar
to us are classical ones with circulating motion of fluid,which are well described by a classical fluid mechanics. In
modern physics, other types of vortices are found in liquid3
He and 4He from a quantum mechanical point of view. Bothof quantizing a circulation and having a localized vorticity
characterize a vortex in superfluid. Especially superfluid

Fig. 1. Three types cw-NMR spectra in superfluid 3He-A phase
confined in a single narrow cylinder of 50 μm radius. Each spectrum
corresponds to a different texture (spatial structure) of order parametersin the condensate.
3

He having many degrees of freedom in a condensate ismore interesting than superfluid 4He having only one type ofvortex.
You can rotate normal liquid in a bucket by rotating thebucket itself but in the case of superfluid it is not easy torotate it in such a way. Besides a vortex nucleation problem,
stabilizing vortices in the bucket is another problem when theradius of bucket becomes very small, so-called a confinedgeometry. The necessary angular velocity of rotation tostabilize a vortex depends on the radius of cylinder and thequantity of circulation quantum of vortex. In superfluid
3
He-A phase, several types of vortex in bulk liquid have been
observed but it was not clear whether another type vortex
appears in the thin cylinder, where the angular velocity stabilizing a vortex becomes large. We showed that circulating
velocity fields in superfluid 3He–A phase were created in avery narrow cylinder, 100 μm in radius, using the rotating
cryostat in ISSP, where three types of vortices were observed[1]. Two of three have the circulation quantum of unity andanother had that of two, which was the same vortex as that inbulk liquid. Recently we can manipulate the type of vortex ineven narrower cylinder, 50 μm in radius, in which three typesof vortices are observed and all vortices correspond to thecirculation quantum of unity [2]. A different type of vortex
consists of different structures of order parameters of thecondensate in a cylinder.
Figure 1 shows that three typical cw-NMR spectra ina single cylinder of 50 μm radius. A spectrum consists ofa few spin wave resonances. Spin wave resonances are thelow energy excitations in magnetic resonance experiments,
whose frequencies are determined by NMR potential createdby the dipole-dipole interaction ED between 3He nuclei insuperfluid state. The order parameters in spin space andin orbital space are coupled each other through ED. Three
NMR spectra correspond to three types of textures, which
are the spatial structures of order parameters in a cylinder.
Our analysis reveals that they are Mermin-Ho hb texture,
Mermin-Ho ax texture, and Radial-disgyration (RD) hb
texture (see details in ref. [2]). These textures correspondto three types of vortices that can be observed in a narrowcylinder.
We have always observed one of three NMR spectra andFig. 2. Stable textures on cooling under rotation at two kinds ofmagnetic fields. (a) RD hb texture appeared at 21.6 mT. (b) MH hb
texture appeared at 21.6 mT after passing through Tc under 0 mT.

ISSP Activity Report 201445

have not observed the spectrum where the textures coexist
each other. Figure 2 shows the stability of textures in therotation-temperature phase diagram strongly depends on themagnetic field on cooling through TC (transition temperature between superfluid and normal fluid) under rotation.
The experimental procedure is quite similar to that of fieldcooling technique in studies of superconducting material.
Theoretical calculations have been done about the stabilityof texture under rotation in magnetic field [3]. There exist
qualitative and quantitative discrepancies between calculated
results and observed ones on the stability of the texture invarying temperatures, magnetic fields and rotation angularvelocities. We think that these discrepancies are attributed tothe metastable state of texture because the textural transitionneeds a higher energy state between textures.
References[1] R. Ishiguro, O. Ishikawa, M. Yamashita, Y. Sasaki, K. Fukuda,
M. Kubota, H. Ishimoto, R.E.Packard, T. Takagi, T. Ohmi, and M.
Mizusaki, Phys. Rev. Lett. 93, 125301 (2004).
[2] T. Kunimatsu, H. Nema, R. Ishiguro, M. Kubota, T. Takagi,
Y. Sasaki, and O. Ishikawa, Phys. Rev. B 90, 214525 (2014).
[3] Y. Tsutsumi and K. Machida, J. Phys. Soc. Jpn. 78, 114606 (2009).
Authors
O. Ishikawaa and T. Kunimatsua
aOsaka City University

Development of Metal Ion-Containing
Ionic Liquid Catalyst on Mesoporous Silica
T. Sasaki
We have been developing and using metal ion-containing
immobilized ionic liquid catalysts in order to design heterogeneous catalysts by utilizing the characteristics of ionicliquids, where ionic liquid molecule with imidazolium
cation moiety is immobilized on silica support and the metal
halogenate anions are introduced as counter anion serving
as reaction centers [1, 2]. It was found that the ImmCu_IL
containing [CuCl4]2- is active for Kharasch addition reaction
between styrene and CCl4. ImmNi_IL was found to be active
for Suzuki cross coupling reactions with chlroarenes andphenyl boronic acids. ImmPd_IL was found to be active in aphosphine-free condition for Suzuki cross coupling reaction
for bromoarenes [2].
We report the synthesis and application of immobilized palladium metal-containing ionic liquid supported on
mesoporous silica such as SBA-15 (ImmPd-IL@SBA-15)
as a novel catalyst for organic reactions. There are several
advantages by using mesoporous material such as SBA-15 as
a support. It has high surface area, easy to prepare, high gas
adsorption capacity and high temperature tolerance.

Fig. 1. TEM images of fresh ImmPd-IL@SBA15

The synthesis procedures were adopted from our method[1, 2] and all the reactions were conducted under nitrogen
atmosphere (Scheme 1). Immobilized ionic liquid on
SBA-15 samples were prepared using 1-methyl-3-(3-trimethoxysilylpropyl) imidazolium chloride (Mtim chloride).
Mtim chloride was synthesized by refluxing the mixture of
N-methylimidazole and 3-trimethoxysilylpropyl chloride at
70°C for 48 h. Mtim chloride and SBA-15 were dispersed
in dehydrate toluene and refluxing, yielding solid products,
Imm-IL@SBA-15. PdCl2 and solid product were added toacetonitrile solution. After refluxing for 24 h, the resulting
materials are obtained, denoted as ImmPd-IL@SBA-15. Fig.
1 shows TEM images for fresh ImmPd-IL@SBA15. Transmission Electron Microscope (JEOL JEM-2100 in ISSP,
Univ. Tokyo) operating at 200 kV was used to obtain brightfield images. It is found that uniform hexagonal channel
structures are retained after immobilization of imidazoliumgroups. No Pd nanoparticles are found. The presence of[PdCl4]2- was also confirmed by EDX analysis and EXAFS
measurements.
It was found that the ImmPd-IL@SBA-15 catalyst has
significantly improved the catalytic activity for synthesisof urea and oxamate derivatives by oxidative carbonylationof amines under co-catalyst, dehydrating agent and ligand
free conditions [3]. ImmPd-IL@SBA-15 was also found to
catalyze polyester amide synthesis by carbonylation polycondensation [4].
References[1] T. Sasaki, C. Zhong, M. Tada, and Y. Iwasawa, Chem. Commun.,
2506 (2005).
[2] T. Sasaki, M.Tada, C. Zhong, T. Kume, and Y. Iwasawa, J. Mol.
Catal. A-Chem. 279, 200 (2008).
[3] S. T. Gadge, E. N. Kusumawati, K. Harada, T. Sasaki, D. NishioHamane, and B. M. Bhanage, J. Mol. Catal. A Chemical 400, 170(2015).
[4] A. Satapathy, S. T. Gadge, E. N. Kusumawati, K. Harada, T. Sasaki,
D. Nishio-Hamane, and B. M. Bhanage, Catal. Lett. 145, 824 (2015).
Authors
T. Sasakia, D. Nishio-Hamane, B. M. Bhanageba
The University of TokyobInstitute of Chemical Technology

Efficient Method for Membrane
Protein Structure Predictions
Y. Okamoto

Scheme 1. Synthetic steps for the ImmPd-IL@SBA-15 catalyst.

46

ISSP Activity Report 2014

Membrane proteins have essential biological functions
based on their structures for life, and atomistic structural
information is important to investigate the mechanismof their functions. Computers have been developing forFig. 1. Two predicted structures from our simulation and hypothesis
about the relation between the structures and effects of retinal molecule
insertion for the structures. In other words, the hypothesis is as follows:from our simulation without retinal molecule, the difference between
above two structures is not large, however, insertion of retinal molecule
into the empty space results in the stabilization of native-like structurecompared to the other structure. This hypothesis is also consistent withprevious experimental results.

decades. However, the resource runs short of structure
predictions by brute-force simulations yet. Thus, efficientalgorithm for computer simulation is needed to reduce
computational resources for the prediction.
There are two fundamental approaches for the developments: decrease of interaction points in system and enhancement of sampling. A former example is to adopt an implicit
solvent model. In good models, this method can achieve thestructure prediction with simulations. A latter example is toemploy replica- exchange method (REM) which enhances
sampling of conformations. This method typically accelerates the crossing of free energy barriers using temperaturechange of replicas.
We developed the method from both approaches. We
extended the previous method to target most membraneproteins [1]. Using the method, we performed structure
prediction of bacteriorhodopsin and reproduced the native
structure. Moreover, we also obtained the expected but
unknown structure with empty space structure for retinal
insertion, which is related to a hypothesis for co-molecule
insertion during membrane protein folding as is shownin Fig. 1. As a result, our simulation produced the consistent results for previous experiments and supported themembrane protein folding hypothesis in co-molecule stage.
Because we confirmed the validity of our new method
for structure predictions, a next step will be to predict theunknown membrane protein structures or low-resolution
protein structures.
We next proposed two new replica-exchange methods
to increase efficiency of REM. One is the method of replica
exchange with a differential equation without pseudo
random numbers [2]. The other is the method that specifies the order of replica exchange and, thus, the trajectory intemperature space among replicas [3]. With 2-dimensional
Ising model, we compared results of these new methods andits combination to results of the conventional Metropolis
replica-exchange method. Figure 2 shows that specific heatobtained from the conventional Metropolis replica-exchange
method (METREM), deterministic replica-exchange method(DETREM), designed-walk replica-exchange method(DEWREM), and their combination. DETREM withrandom-walk replica-exchange method reproduced the exact
quantities including phase transition. Because short interval

Fig. 2. Specific heat of 2-dimensional Ising model obtained by conventional random walk REM, DEWREM, and mixed simulations with (a)Metropolis replica-exchange method and (b) DETREM. The error bars
are smaller than the symbols. In the inset, the labels are as follows.
exact: exact solution, RW: random walk, DEWn: DEWREM with theinterval of n MC steps between replica exchanges, and mixed: mixed
walk.

causes correlation among replicas, DEWREM requires alonger interval of replica- exchange attempts to reproduce
the conventional results. On the other hand, biomolecularsimulation generally employs longer time interval between
replica-exchange attempts. Hence, this does not causesuch a problem in such simulations. In these simulations,
DEWREM will result in the increase of efficiency of conformational sampling. For spin system, another implementationsuch as mixed walk simulation or different pairs in designed
walk can improve the interval problem. These are future
works to improve these methods.
References[1] R. Urano, H. Kokubo, and Y. Okamoto, J. Phys. Soc. Jpn., in press.
[2] R. Urano and Y. Okamoto, arXiv:1412.6959.
[3] R. Urano and Y. Okamoto, arXiv:1501.00772.
Authors
R. Uranoa and Y. Okamotoa
aNagoya University

A New Structure Family of
Oxide-Ion Conductor NdBaInO4
M. Yashima and K. Fujii
Oxide-ion conducting materials such as pure oxide-ion
conductors and mixed oxide ion-electronic conductors havea wide variety of applications in fuel cells, oxygen separation
membranes and gas sensors. Since the oxide-ion conductivity
is strongly dependent on the crystal structure, the discoveryof new oxide-ion conductor belonging to a new structurefamily may open a new window for further innovative developments in the applications of oxide-ion conductors. Here,
we report a new structure family of oxide-ion conductor
NdBaInO4 (Fig. 1) [1, 2].
To design a new layered perovskite-related structure, wehave examined various chemical compositions of AA'BO4
where A and A' are larger cations and B is smaller cation.
After examining a number of chemical compositions, we
discovered a new structure family of oxide-ion conducting
materials NdBaInO4 [1]. The Nd, Ba and In were chosen as
cations, because (i) the different sizes of Nd and Ba can leadto the Ba/Nd cation ordering and (ii) the BaInO3 perovskite
layer can form from the view point of the sizes of Ba and In
cations. Nd1-xSrxBaInO4-x/2 samples were prepared by solid-

ISSP Activity Report 201447

References[1] K. Fujii, Y. Esaki, K. Omoto, M. Yashima, A. Hoshikawa,
T. Ishigaki, and H. R. Hester, Chem. Mater. 26, 2488 (2014).
[2] K. Fujii, M. Shiraiwa, Y. Esaki, M. Yashima, S. J. Kim, and S. Lee,
J. Mater. Chem. A 3, 11985 (2015).
Authors
M. Yashimaa, K. Fujiia, M. Shiraiwaa, Y. Esakia, K. Omotoa, A. Hoshikawab, T. Ishigakib, H. R. Hesterc, S. J. Kimd, and S. LeedaTokyo Institute of Technologyb
Ibaraki UniversitycAustralian Nuclear Science and Technology Organizationd
Korea Atomic Energy Research InstituteFig. 1. Refined crystal structure and orange isosurface of the differencebond valence sum distribution for an oxide ion (O2-) of NdBaInO4. The
structure consists of (i) Nd2O3 A-rare earth structure- and (ii) (Ba,Nd)
InO3 perovskite-layers. The difference bond valence sum map suggeststhat the oxide-ion conduction occurs in the Nd2O3 layer.

state reactions at 1400 oC using BaCO3, SrCO3, In2O3 andNd2O3 powders. NdBaInO4 and Nd0.9Sr0.1BaInO3.95 exhibit
oxide-ion conduction as shown in Figure 2. NdBaInO4 andNd0.9Sr0.1BaInO3.95 samples are a single monoclinic phasewith a new crystal structure as described below. Thus, a new
structure family of oxide-ion conducting material NdBaInO4
was discovered in this study. The oxide-ion conductivityof NdBaInO4 is improved by Sr substitution at the Nd site
(Fig. 2).
Crystal structure of NdBaInO4 was investigated byneutron and synchrotron X-ray powder diffractometry andab initio electronic calculations. We carried out the ab initio
crystal structure analysis using the X-ray powder diffraction
data. Neutron diffraction enables the precise determinationof positional parameters of oxygen atoms. The space group
was found to be monoclinic P21/c. The validity of the crystal
structure of NdBaInO4 (Figure 1) was confirmed by Rietveld
refinements of synchrotron X-ray powder diffraction datameasured at (i) SPring-8 and at (ii) PF, by Rietveld analysisof neutron diffraction data measured at (iii) J-PARC at (iv)
ANSTO, and at (v) KAERI, (vi) by bond valence sums
(BVS) of Nd, Ba and In atoms, and (vii) by the structural
optimization based on the density functional theory (DFT)
calculations. The refined crystal structure of NdBaInO4
consists of (i) Nd2O3 A-rare earth structure- and (ii) (Ba,Nd)
InO3 perovskite-layers (Fig. 1), which indicates a new A/A'
(Nd/Ba) cation ordered perovskite-related layered structure.
An outstanding and unique feature of this new structure isthat the edge of the InO6 octahedron faces the A2O3 (Nd2O3)
layer. The oxide-ion diffusion path of NdBaInO4 was studied
by the bond valence method (Fig. 1). The oxide ions candiffuse two-dimensionally in the A2O3 (Nd2O3) layer.

Fig. 2. (a) Oxygen partial pressure dependence of total electricalconductivity at 858 oC of NdBaInO4 (Black) and Nd0.9Sr0.1BaInO3.95(Red). (b) Arrhenius plots of oxide-ion conductivity of NdBaInO4(Black) and Nd0.9Sr0.1BaInO3.95 (Red).

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ISSP Activity Report 2014

Almost Perfect Frustration in the Dimer
Magnet Ba2CoSi2O6Cl2
H. Tanaka and K. Kindo
Coupled spin dimer magnets provide a stage to embody
the quantum physics of interacting lattice bosons. Thesemagnets often exhibit a gapped singlet ground state. In
an external magnetic field exceeding the energy gap, theSz = +1 component of the spin triplet is created on the dimer.
The Sz = +1 component, called a magnon, acts as a boson on
the dimer lattice. The number of magnons can be tuned via
the external magnetic field corresponding to the chemical
potential. Magnons move to neighboring dimers and interact
with one another owing to the transverse and longitudinal components of the interdimer exchange interactions,
respectively. When the hopping term is dominant, magnons
can undergo Bose–Einstein condensation while when the
hopping term is suppressed so that the repulsive interac-

Fig. 1. (a) Perspective view of the crystal structure of Ba2CoSi2O6Cl2.
Dotted lines denote the chemical unit cell. A magnetic Co2+ ion is
located approximately at the center of the base of the CoO4Cl pyramid,
where the pyramids are linked via orange-colored SiO4 tetrahedra in
the ab plane. (b) Model of the exchange network for Ba2CoSi2O6Cl2.
Thick solid lines represent the intradimer exchange interaction J, andthin solid, dashed and dotted lines represent the interdimer exchangeinteractions

field directions. This finding shows that the frustration for
the interdimer exchange interactions is almost perfect. The
Ms/2 plateau state is almost exactly given by the alternate
product of singlet and triplet dimers, which corresponds to a
Wigner crystal of magnons.
References[1] H. Tanaka, N. Kurita, M. Okada, E. Kunihiro, Y. Shirata, K. Fujii,
H. Uekusa, A. Matsuo, K. Kindo, and H. Nojiri, J. Phys. Soc. Jpn. 83,
103701 (2014).
[2] A. Abragam and M. H. L Pryce, Proc. R. Soc. London, Ser. A 206,
173 (1951)[3] M. E. Lines, Phys. Rev. 131, 546 (1963)
Authors
H. Tanakaa, N. Kuritaa, M. Okadaa, E. Kunihiroa, Y. Shirataa, K. Fujiia,
H. Uekusaa, A. Matsuo, K. Kindo, and H. NojiribaTokyo Institute of Technologyb
Tohoku University
Fig. 2. Magnetization curves measured at 1.3K for H || c* and H || abusing a piece of single crystal corrected for Van Vleck paramagnetism.
Dashed lines are theoretical magnetization curves calculated using theanisotropy of the interdimer exchange interaction and the intradimer
exchange interaction.

tion due to the antiferromagnetic interdimer interaction isdominant, magnons can crystallize to form a regular array.
Here we report the crystal structure of the spin dimer
magnet Ba 2CoSi 2O 6Cl 2 and show that this compound
exhibits magnon crystallization in a high magnetic fieldowing to the strong frustration of interdimer exchange interactions, which is different from the orthogonal dimer model[1]. The crystal structure consists of CoO 4Cl pyramidswith a Cl- ion at the apex, as shown in Fig 1(a). Magnetic
Co2+ is located approximately at the center of the basecomposed of O2-, which is approximately parallel to theab-plane. Two CoO4Cl pyramids form a chemical dimer
with their bases facing each other. The magnetic propertyof Co2+ in an octahedral environment is determined by thelowest orbital triplet 4T1. This orbital triplet splits into six
Kramers doublets owing to spin–orbit coupling and thelow-symmetric crystal field. When the temperature T is much
lower than the magnitude of the spin–orbit coupling constant,the magnetic property is determined by the lowest Kramers
doublet, and the effective magnetic moment of Co2+ is represented by the fictitious spin-1/2 operator [2, 3].
Figure 2 shows the magnetization curves for
Ba2CoSi2O6Cl2 single crystal measured at 1.3 K for H || c*and H || ab. The entire magnetization process was observed
up to a magnetic field of 70 T. The saturation of the Co2+
spin occurs at Hs ≃ 57 and 41 T for H || c* and H || ab,
respectively. It can be clearly seen that the magnetization
processes for both field directions are stepwise with a plateau
at Ms /2. The singlet ground state is stabilized in a wide
field range below Hc. These magnetization processes can be
explained to consider that the interdimer exchange interactions are perfectly frustrated, which corresponds to the case
ab
ab
ab
ab
J 11 + J 22 = J 12 + J 21 within the exchange network shownin Fig. 1(b). In this case, the magnon cannot move onto theneighboring dimer, because the hopping amplitude is proporababababtional to J 11 + J 22 - J 12 - J 21. Hence, the ground state isdetermined by the balance between the Zeeman energy andthe repulsive interaction between magnons. Consequently,
a stepwise magnetization process with the Ms /2 plateau
occurs, as observed in Ba2CoSi2O6Cl2.
In conclusion, this compound should be described as a
2D coupled spin dimer system with XY-like exchange interactions. Ba2CoSi2O6Cl2 exhibits a stepwise magnetization
process with an Ms /2 plateau, irrespective of the magnetic

Thermal Critical Properties of
Two-Dimensional Generalized SU(N)
Heisenberg Models
T. Suzuki, K. Harada, and H. Matsuo
In recent years, deconfined critical phenomena (DCP) [1]have attracted much attention in condensed matter physics.
The transition that exhibits DCP is expected to take place
between a magnetic ordered phase and valence bond solid(VBS) phase. The most famous model family that showssuch phase transition is the two-dimensional Heisenberg
models with multiple singlet-projection terms for SU(N)spins, namely SU(N) JQm models [2]. We investigated thequantum criticality between the Neel phase and the VBS
phase in the JQ2 model on the square lattice and the JQ3model on the honeycomb lattice by using quantum Monte
Carlo (QMC) calculations [3]. From the finite-size scaling
analysis, we found that data collapses for order parameters are obtained by the same scaling function independently of the lattice geometry. This result implies that thequantum phase transition in those models is of the second
order transition. However, as the system size increases, theFig. 1. Critical temperature Tc and critical exponent ν of the SU(N)generalized Heisenberg model. (a) and (c) ((b) and (d)) are results of
Tc (ν) for the square-lattice and honeycomb-lattice case, respectively.
Vertical dotted lines correspond to the quantum critical point between
the Neel phase and VBS phase. The horizontal axis λ is the coupling
ratio between Heisenberg interaction J and the amplitude of themultiple singlet-projection term Qm, λ=J/(J+Qm).

ISSP Activity Report 201449

estimated value of the quantum critical exponent ν exhibits amonotonic change and it approaches the phenomenologicalvalue for the first order transition. To discuss the quantum
criticality from the different viewpoint and clarify the whole
phase diagrams, we have studied the thermal critical properties of those models.
When we focus on the thermal properties of the SU(N)JQm models, the thermal phase transition to the VBS phaseis possible because the VBS phase is characterized by coverings of the singlet dimers on the square or honeycomb
lattice. We calculated the temperature dependence of the
VBS order parameter by the QMC method. In figure 1, weshow the critical temperature Tc and the thermal exponentν which were evaluated from the finite-size scaling analysis
up to L=192 for the square lattice case and L=96 for thehoneycomb lattice case. Since the dimer covering state in the
VBS phase is related to the rotational symmetry breakingof the lattice, we can expect the presence of the classicalspin models that belong to the same universality class. In
the present cases, the universality class of the square-latticecase is expected to be the same as that of the classical XY
model with π/2-rotational symmetry breaking field, namely
the XY+Z4 model. In the honeycomb-lattice case, it may
correspond to the three-state Potts model because the transition is characterized by π/3-rotational symmetry breaking.
As shown in figure 1, ν increases monotonically in thesquare-lattice case when the system approaches the quantum
critical point. It is obvious that the increase of ν survives
in the vicinity of the quantum critical point. The similar
behavior of ν is also observed when the classical XY+Z4
model approaches the XY model limit, where the KosterlitzThouless transition is realized. In the honeycomb lattice case,ν is almost constant at ν ~ 5/6, the value of the three-state
Potts universality class. If the system shows the first-ordertransition at a zero temperature, a shift of ν toward the firstorder-transition value is expected in both cases. However, wefound that the first-order transition is unlikely for Tc/(J+Qm)≳ 1/100.
References[1] T. Senthil et al., Phys. Rev. B 70, 144407 (2004); T. Senthil et al.,Science 303, 1490 (2004).
[2] A. Sandvik, Phys. Rev. Lett. 98, 227202 (2007).
[3] K. Harada et al., Phys. Rev. B 88, 220408 (2013).
[4] T. Suzuki et al., Phys. Rev. B 91, 094414 (2015); J. Phy.:Conf.
Series. 592, 012114 (2015).
Authors
T. Suzukia, K. Haradab, H. Matsuoc, S. Todod, and N. Kawashimaa
The University of Hyogob
Kyoto Universityc
RISTd
The University of Tokyo

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ISSP Activity Report 2014

ISSP Activity Report 201451

Conferences and Workshops
International Conferences and Workshops
New Horizon of Strongly Correlated Physics (NHSCP2014)
June 16 - July 4, 2014
H. Tsunetsugu, K. Ueda, H. Kusunose, A. Koga, and J. Otsuki
Since 2006, the ISSP has organized an annual series of three-week workshops, with the only exception in 2011 due tothe aftermath of the Tohoku earthquake. The last two in the series are “MAterial Simulation in Petaflops eta” (MASP2012)
and “Emergent Quantum Phases in Condensed Matter – from topological to first-principles approaches” (EQPCM2013).
In 2014, the ISSP organized the eighth workshop, “New Horizon of Strongly Correlated Physics” (NHSCP2014), held
for three weeks starting from mid-June. Recent developments in theoretical and numerical studies on strongly correlated
systems were discussed, and a special focus was placed on the strong correlation effects on dynamics and non-equilibrium phenomena. The main topics intensively discussed include the non-equilibrium Mott transition and optical response
there, spin liquids, frustrated systems, topological insulators in strongly correlated electron systems, multipolar orderin heavy fermion systems, multiple-component superfluidity in optical lattices. Dynamical mean field theory is thehighlight in the workshop. Its many new progresses and developments were presented, and the dual-fermion and the dualboson approaches aroused intense interest. The program and presentation materials are available on the web at the URL
http://www.issp.u-tokyo.ac.jp/public/nhscp2014/.
Following the tradition of the series, the workshop contained the intensive three-day symposium during Jun. 25–27, and 33
oral and 17 poster presentations were made there. The remaining part was arranged into a more relaxing style providing a long
discussion time, and 21 oral presentations were made. This style of workshop attracted many people; the cumulative number ofparticipants during the three weeks summed up to just 600, and 272 of them attended the symposium part.
The NHSCP2014 workshop was organized by the ISSP and it was also supported by Computational Materials Science
Initiative (CMSI) and Elements Strategy Initiative Center for Magnetic Materials (ESICMM). The workshop chairman was
Hirokazu Tsunetsugu (ISSP) and the other organizers were Kazuo Ueda (ISSP), Hiroaki Kusunose (Ehime Univ.), Akihisa
Koga (Tokyo Tech.), and Junya Otsuki (Tohoku Univ.). The organizers acknowledge a significant contribution from the oversea
scientific advisor, Philipp Werner of University of Fribourg.

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ISSP Activity Report 2014

Joint Symposium of Polymer Networks and Research Group on Polymer Gels
(PN&G2014)
November 10 - 14, 2014
M. Shibayama
The joint symposium of the 22nd Polymer Networks Group Meeting (PNG) and the 10th Gel Symposium (PN&G2014)
was held at Ito International Research Center in Hongo Campus, the University of Tokyo. The PNG Meetings, started in 1975
in Strasburg, France, were held in Europe every other year, and is focusing on the physics of polymer networks and the theoryof gelation, the structure and properties of polymer networks. On the other hand, Polymer Gel Symposium, an international
symposium on polymer gels launched in 1989, is organized by Research Group on Polymer Gels, the Society of Polymer
Science, Japan. It has also been held every other year, but exclusively in Japan. This was the first joint symposium on polymer
networks and gels with the theme of “Cutting Edge of Chemistry, Physics, and Engineering in Polymer Networks”. The symposium covered all fields of polymer gels and networks and provided a platform for scientific exchange in all areas relevant totheory and simulation, fabrication, structure, properties, and industrial/medical applications of gels.
There were 281 active participants from 23 countries. The oral sessions included 8 plenary lectures, 18 keynote lectures, 5
invited lectures, 56 contributed papers, and 7 Young Investigator Award nominee lectures. The symposium started with a mixer
on Nov. 10, where a large number of participants from abroad got together. The scientific session began on Nov. 11 and ended
with the concluding remark in the evening of Nov. 14, followed by Symposium Banquet with a large number of participants.
Poster sessions were scheduled in the evening session from 19:00 – 20:30 on Nov. 11 and 12, and 134 posters were displayed in
the two sessions. In addition to high-quality posters, snack service kept the audience to stay in the session until the last minute.
7 young investigators were awarded to the first PNG Young Investigator Awards sponsored by Sumitomo Bakelite Co. and by
German and UK companies. In addition, 10 poster awards sponsored by Soft Matter, Royal Society of Chemistry, UK, andResearch Group on Polymer Gels, Japan, were given to young scientists including graduate students and postdoctoral fellows.
The next PNG will be held during June 19 – 23, 2016, in Stockholm, Sweden.
http://www.issp.u-tokyo.ac.jp/public/PNandG2014/

Young Investigator Awardees, PNG

Banquet

ISSP Activity Report 201453

ISSP–MPIPKS Joint Workshop: Dynamics of Strongly Correlated Systems” (DSCS2015)
March 30 - 31, 2015
H. Tsunetsugu and R. Moessner
The ISSP conducts academic exchange programs with several foreign institutions, and one of the partners is Max Planck
Institute for the Physics of Complex System (MPI–PKS) in Dresden, Germany. As a part of this exchange program, the ISSP
and MPI–PKS recently started organizing joint workshops, and the first one took place at MPI–PKS in April of 2012. In thisMarch 30–31, the ISSP hosted the second joint workshop, “Dynamics of Strongly Correlated Systems” (DSCS2015), and it wascochaired by Hirokazu Tsunetsugu (ISSP) and Roderich Moessner (MPI-PKS).
The DSCS2015 workshop aimed at overview and discussion on recent developments in theories and experiments onstrongly correlated systems with special focus on their dynamical properties, non-equilibrium and transport phenomena, andrelated topics. Main subjects discussed include the following topics: electric and thermal conductivities, cross response between
electric, magnetic, and thermal properties, topological quantum phases in strongly correlated electron systems, and effects ofstrong correlations on topologically protected surface states. Responses near metal-insulator transition or charge order wereanother focused topic as well as exotic properties of frustrated magnets/metals and unconventional superconductors. Anotherimportant topic was an emerging one and that was thermalization/non-thermalization of strongly correlated systems.
During the two-day workshop, the cumulative number of participants was 128, and there were 15 oral presentations, ofwhich 13 were invited, and 19 poster presentations. The papers presented have stimulated participants and they are expected
to yield various further progresses in the future. The program and the abstract booklet are available on the web at the URL
http://tsune.issp.u-tokyo.ac.jp/dscs/index.html

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ISSP Workshops
Novel Quantum Phenomena in Supermatter

April 17 - 19, 2014
K. Shirahama, M. Tsubota, M. Oshikawa, and Y. Okuda

Emergent quantum phenomena in matters often lead to universal concepts in science. As a prime example, superfluidity/
superconductivity observed at very low temperatures gave a motivation to formulate spontaneous symmetry breaking in field
theory and high-energy physics. In order to find a seed of universal concept, it is desirable to control the degrees of freedom
and structure of the matter so that the system can be tuned to exhibit a particular phenomenon in a genuine way. This is realizedin various systems which we will call “supermatters” with multiple layers of structure. The term was conceived in analogy tosuperlattice, which is made by stacking different crystals. Examples of supermatters include quantum vortices in superfluids/
superconductors, ultracold atoms and liquid Helium in periodic potentials, quantum spin liquid with exotic elementary excitations, collective excitations in superfluid Helium 3, and exciton-polariton condensates with highly tunable parameters. We hopethat the development and investigation of various supermatter systems will contribute to elucidation of fundamental problems inphysics and to construction of novel universal concepts.
This workshop was organized with the purpose of sharing the common perspective of supermatter among scientists fromvarious backgrounds, and of discussing future directions. Although the workshop was held at the beginning of the Japanese
academic year, there were 244 cumulative participants over 3 days, attending 40 oral and 27 poster presentations and lively
discussions. It was indeed a very useful meeting to exchange ideas based on studies of many different systems which had been
pursued independently, and to seek new directions.
Details on the workshop can be found in the web page (in Japanese):
URL http://www.issp.u-tokyo.ac.jp/public/SuperMatter/

New Horizon of Strongly Correlated Physics (NHSCP2014)
June 25 - 27, 2014
H. Tsunetsugu, K. Ueda, H. Kusunose, A. Koga, J. Otsuki, and Z. Hiroi
This ISSP workshop was held as the symposium part of the international workshop of the same title. See the section of“International Conferences and Workshops”.

ISSP Activity Report 201455

Toward a Paradigm Shift of Synchrotron Radiation Based Materials Science in the
VUV-SX Region

September 20 - 21, 2014
Y. Harada, A. Fujimori, S. Shin, F. Komori, and I. Matsuda

In order to encourage a motivation and discussions that demand an internationally competitive vacuum ultra-violet-soft
X-ray (VUV-SX) light source in Japan in addition to the present synchrotron light sources, it is now necessary to acceleratemutual communications not only within the present VUV-SX community but also with broad scientific community. This
workshop was held aiming to boost a paradigm shift of synchrotron radiation based materials science and further of all thescientific community in Japan by broad-ranging discussions beyond the concept of community such as ultra-violet, soft X-ray,
hard X-ray and even inside/outside synchrotron radiation. The program was categorized into four sessions by “catalyst/battery”,“soft matter/biomaterial”, “solid and surface physics” and “materials science” and representative or energetic and pioneering
young researchers in each field were selected as speakers of review-talks.
In all sessions there were a lot of questions and comments, regarding such as new scientific directions by a combination ofdifferent synchrotron techniques, actual scientific requests for the energy/spatial resolution that much exceed the ability of thepresent synchrotron techniques, possible collaborative synchrotron and neutron studies and so on. The workshop dealt withissues mostly aiming at real applications, thus it was unique among workshops held in ISSP and will contribute to establish a
new scientific trends in ISSP.

ISSP Workshop: Physical Chemistry Revealed by Advanced Operando Observations
September 29 - 30, 2014.
I. Matsuda, J. Yoshinobu, Y. Harada, S. Yamamoto, Y. Takagi, and M. Nagasaka
Today there is strong demand in our society towards developing
novel catalysts and devices that will solve energy and environmental
problems. In recent years the importance of the spectroscopic/microscopic characterization of materials during operation with confirming
their operation at the same time starts to be realized. For example,
chemical reactions on a catalyst surface involve a variety of dynamic
processes such as adsorption, diffusion, desorption of molecules. To gain
the fundamental understanding on a reaction mechanism, the heterogeneous catalysts under real reaction conditions have to be studied. Thisapproach is called “Operando observation”, which becomes a key topic
in catalysis and device researches. Very recently, “Operando observation” in X-ray region becomes possible by the development of highbrilliant synchrotron light sources and novel instruments.
This workshop thus aimed to discuss the latest results both fromexperimental and theoretical studies on the catalysts and devices using“Operando observation”, and to create new human network among
the researchers’ community and promote the scientific collaborations.
The workshop covered a broad range of related topics including X-ray
spectroscopies, electron microscopies, vibrational spectroscopies as wellas theoretical studies. The workshop welcomed 102 participants, notably
30% of which are from private companies. The program of the workshop
consisted of 1 invited lecture, 13 invited oral presentations and 16 poster
presentations.

56

ISSP Activity Report 2014

Recent Advances in Physics of Strongly Correlated Electrons in Skutterudite andRelated Compounds

October 10 - 12, 2014
C. Sekine, T. Sakakibara, H. Harima, Y. Aoki, R. Shiina, and K. Iwasa

Filled skutterudite compounds, in particular Pr- and Sm-based ones having more than two 4f electrons, exhibit a variety of
many-body quantum phenomena. Extensive studies were done on these systems during the MEXT project, Grant-in-Aid for
Scientific Research on Priority Area “Evolution of New Quantum Phenomena Realized in the Filled Skutterudite Structure”(2003-2007), and the basic physical picture of those phenomena was partly clarified. Seven years have past after the end of the
project, and there has been substantial progress in the research on filled skutterudites and the related systems having a similar
caged structure. This workshop was aimed to further advance the physics of strongly correlated systems realized in those
caged systems, and covered a broad range of topics including pyrochlores, clathrates, and RT2X20. The presentations included
4 review talks, 13 invited talks and 22 poster presentations. Recent advances and some remaining issues in this field werediscussed intensively.

Supercomputer Users Meeting
Novermber 13 - 14, 2014
T. Oguchi, S. Yunoki, R. Yamamoto, S. Tsuneyuki, S. Todo, H. Noguchi, O. Sugino, H. Akai, T. Ozaki,
H. Watanabe, H. Kasamatsu, Y. Noguchi, S. Morita, I. Matsuda, S. Harada, and N. Kawashima
This is the meeting for the ISSP supercomputer general use held annually to exchange information on the latest developments in condensed matter physics achieved by the use of ISSP supercomputer. This year’s meeting was held also for the
CCMS annual activity report. The selection of speakers is based on suggestions made by three unaffiliated scientists appointed
as the program committee members. Since SY2014 is the last year of the current supercomputer system that started operationin 2010, the meeting was a good opportunity for surveying what have been achieved by the current system, and indeed an active
discussion was held among the audience, of which the cumulative total number was 154. Having made the keyword of thisyear’s meeting “Industrial Applications of Computational Sciences”, we had speakers who have close contact with researchers
in industry and their industry partners, such as Taisuke Ozaki (ISSP) and Hideaki Sawada (Nippon Steel & Sumitomo Metal).
Yoshitaka Tateyama (NIMS) gave a presentation on his recent work of the first-principles calculation concerning solid battery.
We also invited three speakers who wrote invited articles in
the annual report of ISSP supercomputer general use: Shiro
Sakai (RIKEN), Takeo Hoshi (Tottori) and Hayato Shiba(ISSP). Also notable was the presentation on software developments and their public release in the field of condensed
matter physics.

ISSP Activity Report 201457

ISSP Series Workshop on Synergetic Science for Functional Material Systems:(1) Optical Functions
December 4 - 5, 2014
H. Akiyama, H. Mori, J. Yoshinobu, F. Komori, M. Shibayama, T. Suemoto, O. Yamamuro,O. Sugino, H. Noguchi, Y. Harada, I. Matsuda, and M. Lippmaa

This workshop focusing on optical functions is
the first one among series workshops on synergetic
science for functional material systems, which were
proposed and organized by the 12 members of ISSP
working group for a future plan on a new research
center of interdisciplinary area. We collected presentations consisting of 16 invited talks and 19 contributed
posters. The topics of the workshop covered functional
optical properties of various material systems, functional
optical imaging, and bio-medical imaging. Protein was
one of the most frequently discussed material systems,
which enable ion pumping, photo-synthesis, photosensing, and bio-luminescence in biological systems.
Novel bio-medical imaging was also hot topic in theworkshop. Though they had been exotic subjects in ISSP
seminars, we sincerely realized that those are important
subjects that ISSP must watch and challenge. We had 76
and 57 attendances
for the first and thesecond days, respect ive l y, i n c l u d i n gyoung researchersand students fromother universities.

ISSP Workshop: Status of SPring-8 BL07LSU and Prospects for the Next Generation
Synchrotron Light Sources
March 5, 2015
H. Wadati, S. Shin, F. Komori, I. Matsuda, and Y. Harada

Synchrotron radiation laboratory has a Harima branch to maintain and develop a high-brilliance soft X-ray beamline
BL07LSU at SPring-8. There we are performing time-resolved, spatial-resolved and energy-resolved soft X-ray spectroscopy
to study electronic states and their dynamics of new materials. In this workshop, recent research activities at our beamline werereported and our future prospects toward the next generation synchrotron light sources were discussed. The speakers talked
about their recent results from each end station (time-resolved spectroscopy, 3D nano-ESCA, emission spectroscopy, and soon). There were two invited talks; one is about synthesizing new materials and the advantage of using synchrotron x-rays forthis synthesis process, and the other is about the upgrade plan of the light source to SPring-8 II. There were a lot of discussions
for each talk, and we successfully started to obtain a clear vision about how we can utilize the next generation synchrotron lightsources for the condensed-matter research. We also encouraged the young generation in this research field by awarding the bestposter prizes to two graduate students.

58

ISSP Activity Report 2014

ISSP Workshop: Topological Aspects in Correlated Electron Systems
March 26, 2015
S. Nakatsuji, M. Oshikawa, T. Sakakibara, and M. Takigawa
This workshop was intended to deepen our understanding on novel phenomena that have been seen in many correlated
electrons and its possible relation to topology of electronic structure and spin texture. Experts from the field provided us both
pedagogical and advanced talks on topical subjects covering iridates, heavy fermions, Bismuth, Axion and Weyl anomalies inmetals. Another purpose of the workshop was to enhance the collaborative research activities among participants. For the latter
perspective, the workshop was supported by both the ISSP workshop series, and by our JSPS project for Strategic International
Networks Project on Topological Phenomena in Novel Quantum Materials.
In spite of a short announcement, a large number of on/
off-campus researchers reaching 75 attended this workshop.
The workshop consisted of two parts. The morning part wasa pedagogical lecture for non-experts on “Novel correlated
topological phases in correlated materials.” by Prof. Leon
Balents (UCSB), which gave an introduction on the concept of
the topology in condensed matter physics and its application tocorrelated electron systems.
The afternoon part was made by three sessions with aseries of talks intended for experts. As the first speaker in thefirst session, Prof. Luis Balicas (NHMFL, Florida) gave atalk on the discovery of the axial anomaly in the quasi-twodimensional metal PdCoO2. This talk was followed by Prof.
Masaki Oshikawa (ISSP), who made a theory talk on the chiralmagnetic effect in an insulator. Then, the next session focusedon the recent development in understanding of Bismuth. First
talk was given by Prof. Yuki Fuseya (UEC, Tokyo) on Spin Hall Effect and Large Anisotropic g-Factor of Bismuth. This wasfollowed by an experimental talk by Dr. Robert Kuechler (MPI-CPfS, Dresden), on the thermodynamic evidence for valleydependent density of states in bulk bismuth. Finally, in the last session, the topological aspects in strongly correlated electron
systems were discussed. In particular, two talks were given focusing on the quantum critical phenomena in the mixed valentsystem β-YbAlB4. Distinct quantum critical behaviors were discussed in the first talk by Dr. Takahiro Tomita (ISSP), whichwere found to form a strange metal without magnetic criticality. It was pointed out that these quantum critical behaviors
are clearly different from the typical non-Fermi liquid behaviors observed in the vicinity of the antiferromagnetic quantum
critical point. Finally, Prof. Andriy Nevidomskyy (Rice Univ., Houston) introduced a novel topological viewpoint to understand anomalous properties and superconductivities in the heavy fermion systems such as β-YbAlB4 and UPt3. Throughout
this workshop, very active discussions were made and the future direction was addressed to shed further light on the emergent
topological phenomena in correlated electron systems.

ISSP Activity Report 2014

59

60

Subjects of Joint Research

ISSP Activity Report 2014

平成 26 年度 共同利用課題一覧（前期）/ Joint Research List (2014 First Term)
嘱託研究員 / Commission Researcher
No．

課題名

担当所員：中辻

氏名

所属

Title

Name

Organization

Hiroshi Sawa

Nagoya University

Kazumasa Miyake

Toyota Physical andChemical ResearchInstituteKenta Kimura

Osaka University

Yoshitomo Karaki

University of the
Ryukyus

知1

X 線回析実験による軌道状態の研究とその化学的澤
置換効果の解明2

価数異常を伴う量子臨界現象

三宅和正

豊田理化学研究
所

3

幾何学的フラストレート磁性体における量子物
性の研究

木村

健太

大阪大学

大学院基礎工学
Quantum state of matter in geometrically-frustrated magnets
研究科

4

超伝導と核強磁性の共存

柄木

良友

琉球大学

教育学部

大串

研也

東北大学

大学院理学研究
Exploration of strongly correlated transition-metal compounds Kenya Ohgushi
科

担当所員：榊原5名古屋大学

大学院工学研究 X-ray diffraction study of orbital state and its control bychemical substitution
科
Quantum criticality associated with valence instability

Interplay between superconductivity and nuclear
ferromagnetizm

俊郎

強相関遷移金属化合物の開拓担当所員：吉信

博

Tohoku University

淳
Fleurence Antoine

Japan Advanced
Institute of Scienceand Technology

大学院工学研究 Investigation of electronic/optical properties of organic
molecules on sold surfaces
科

Yuji Kuwahara

Osaka University

Elementary excitations of adsorbed molecules using low多元物質科学研
temperature scanning tunneling spectroscopy and high究所
resolution electron energy loss spectroscopy

Tadahiro Komeda

Tohoku University

6

HREELS によるシリセンの化学的性質の解明

アントワーヌフロランス

北陸先端科学技 マテリアルサイ
Exploring chemical properties of silicene using HREELS
術大学院大学
エンス研究科7

固体表面に吸着した有機分子の電子・光学物性
評価

桑原

裕司

大阪大学

8

極低温非弾性トンネル分光と高分解能電子エネ
ルギー損失分光による吸着分子の素励起過程

米田

忠弘

東北大学

No．

課題名

9

酸化物半導体光触媒における水分解反応の研究

松本

吉泰

京都大学

大学院理学研究 Study of water splitting reaction on oxide semiconductor
catalysts
科

Yoshiyasu
Matsumoto

Kyoto University

10

二酸化炭素還元触媒反応に関する研究

森川

良忠

大阪大学

大学院工学研究
Study on catalytic reactions of reduction of CO2
科

Yoshitada Morikawa

Osaka University11

銅表面上に吸着した一酸化窒素の振動状態

奥山

弘

京都大学

大学院理学研究
Vibrational states of nitric oxide adsorbed on Cu surfaces
科

Hiroshi Okuyama

Kyoto University

担当所員：上床

氏名

所属

Title

Name

Organization

美也

ISSP Activity Report 201412

有機伝導体の圧力効果

村田惠三

大阪市立大学

大学院理学研究
Effect of pressure on the organic conductor
科

Keizo Murata

Osaka City University

13

多重極限関連圧力装置の調整

高橋

博樹

日本大学

文理学部

Hiroki Takahashi

Nihon University

14

希土類化合物の単結晶試料評価とその圧力効果

藤原

哲也

山口大学

大学院理工学研
Effect of pressure on the Ce compounds
究科

Tetsuya Fujiwara

Yamaguchi University15

磁性体の圧力効果

巨海

玄道

久留米工業大学

Gendo Oomi

Kurume Institute ofTechnology

16

圧力下 NMR 測定法に関する開発

藤原

直樹

京都大学

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

Naoki Fujiwara

Kyoto University

17

低温用マルチアンビル装置の開発

辺土

正人

琉球大学

理学部

Masato Hedo

University of the
Ryukyus18

中性子回析に用いる圧力装置の開発

片野

進

埼玉大学

大学院理工学研
Developments of high pressure cell for neutron diffraction
究科

Susumu Katano

Saitama University

19

擬一次元有機物質の圧力下物性研究

糸井

充穂

日本大学

医学部

Study on pressure induced superconductivity of quasi organic
conductor

Miho Itoi

Nihon University20

高圧下の比熱測定装置の開発

梅原

出

横浜国立大学

工学部

Development of apparatus for specific heat measurements
under high pressure

Izuru Umehara

Yokohama National
University21

磁化測定装置の開発

名嘉節

物質・材料研究機構

Development of the magnetometer

Takashi Naka

National Institute forMaterials Science22重い電子系物質における圧力下電気抵抗測定

礒田

誠

香川大学

教育学部

古坂

道弘

北海道大学

Development of a compact focusing small-angle neutron
大学院工学研究
scattering instrument and application research using the院
instrument

担当所員：柴山

61

23

Adjustment of cubic anvil apparatus

Effect of pressure on the magnetic materials

Development of multi-anvil apparatus for low temperature

Effect of pressure on the electrical resistivity of heavy fermi on
Makoto Isoda
compounds

Kagawa University充弘

小型集束型小角散乱装置の高性能化及びそれによる応用研究Michihiro Furusaka

Hokkaido University

62
ISSP Activity Report 2014

No．

課題名

24

中性子散乱装置の共同利用・開発による強相関
電子系物質の構造物性の研究

岩佐

和晃

東北大学

大学院理学研究 Structural studies of strongly correlated electron systems byneutron scattering method and instrumental development
科

25

中性子モノクロメータの改良と中性子４軸回折
計 FONDER の制御プログラムの改良

木村

宏之

東北大学

多元物質科学研 Improvement of neutron monochromator and control program
Hiroyuki Kimura
for four circle neutron diffractometer FONDER
究所

Tohoku University26

中性子散乱装置のアップグレードと共同利用研
究の推進

藤田

全基

東北大学

金属材料研究所

Upgrading of the neutron scattering device and promotion of
the research and public use

Masaki Fujita

Tohoku University27

中性子散乱装置のアップグレード後の研究計画の実施と共同利用の推進平賀晴弘

高エネルギー加 物質構造科学研 Implementation of the research plan under the cooperationuse program after upgrading neutron scattering instruments
速器研究機構究所

Haruhiro Hiraka

KEK

28

中性子散乱装置のアップグレード後の研究計画の実施と共同利用の推進

田畑

吉計

京都大学

大学院工学研究 Progress of the joint research by using the neutron scattering
instruments
科

Yoshikazu Tabata

Kyoto University29

中性子散乱装置のアップグレード後の研究計画の実施と共同利用の推進

松村

武

広島大学

大学院先端物質 Promotion of joint research after the upgrade of neutron
scattering instruments
科学研究科

Takeshi Matsumura

Hiroshima University

30

J-PARC/MLF と JRR-3 共存時代に向けた３軸型
中性子散乱装置の高度化松浦直人

総合科学研究機
構

Masato Matsuura

CROSS

31

中性子分光器を用いた強相関電子系物質の微視
的研究

桑原

慶太郎

茨城大学

大学院理工学研 Neutron scattering study of strongly correlated electron
systems by using neutron spectrometers
究科

Keitaro Kuwahara

Ibaraki University

32

高度化した３軸分光器を用いた共同利用の推進と物質科学研究の実施

横山

淳

茨城大学

理学部

Executing user program and study of material science with the
Makoto Yokoyama
advanced triple-axis spectrometers

Ibaraki University

33

冷中性子スピン干渉計の応用と MINE ビームラ
インの整備

田崎

誠司

京都大学

大学院工学研究 Development of cold neutron spin interferometry andimprovements of MINE beam line
科

34

膜貫通ペプチドのフリップフロップ誘起能の評
価

中野

実

富山大学

大学院医学薬学
Induction of phospholipid flip-flop by transmembrane peptides Minoru Nakano
研究部（薬学）

35

C1-3

杉山

正明

京都大学

原子炉実験所

Development of micro-focusing small-angle neutron scattering
spectrometer

Masaaki Sugiyama

Kyoto University

36

集光テスト用小型 SANS の開発及び冷中性子反射率計・干渉計のアップグレード

日野

正裕

京都大学

原子炉実験所

Improvement of MIEZE spectrometer and cold neutronreflectometer and interferometer

Masahiro Hino

Kyoto University

37

集光テスト用小型 SANS の開発及び冷中性子反射率計・干渉計のアップグレード

北口

雅暁

名古屋大学

現象解析研究セ Development of compact SANS and improvement of cold
neutron reflectometer and interferometer
ンター

Masaaki Kitaguchi

Nagoya University38

中性子散乱用高圧セルの開発および高圧下における中性子散乱実験

藤原

哲也

山口大学

大学院理工学研 Neutron scattering experiments under high pressure anddevelopment of high pressure cell for neutron scattering
究科

Tetsuya Fujiwara

Yamaguchi University39

流動場でのソフトマターの構造変化に関する研
究

高橋

良彰

九州大学

先導物質化学研
Studies on structural change of soft matter under flow field究所

Yoshiaki Takahashi

Kyushu University40

三軸分光器を用いた極端条件下における物質科
学研究の実施

阿曽

尚文

琉球大学

理学部

Naofumi Aso

University of the
Ryukyus

ULS 極小角散乱装置 IRT

氏名

所属

Title

Upgrade of 3-axis neutron spectrometer for the oncoming
coexistence of J-PARC/MLF and JRR-3

Material science studies under extreme conditions by using
triple-axis spectrometers

Name

Organization

Kazuaki Iwasa

Tohoku University

Seiji Tasaki

Kyoto University
University of Toyama

No．

課題名

氏名

所属

Title

大学院理工学研
Phase transition of bilayers in a pressure-induced vesicle
究科

Name

Organization

Youhei Kawabata

Tokyo Metropolitan
University

Shinichi Itoh

KEK

Yoshie Otake

RIKEN

41

圧力誘起ベシクルにおける 2 分子膜の相転移

川端

庸平

首都大学東京42

中性子散乱研究計画の実施と共同利用の推進伊藤晋一

高エネルギー加 物質構造科学研
Propelling the inter university research cooperation
速器研究機構究所

43

冷中性子干渉イメージング装置開発研究大竹淑恵

理化学研究所

光量子工学研究 Research and development of interferometric imaging
instruments for cold neutron
領域

44

高度化した三軸分光器を用いた共同利用の推進とスピンダイナミクスの研究

佐藤

卓

東北大学

多元物質科学研 Promoting user program and investigating spin dynamics using
Taku Satoadvanced triple-axis spectrometers
究所

Tohoku University

45

高度化した三軸分光器を用いた強相関電子系物
質の研究

南部

雄亮

東北大学

多元物質科学研 Study of strongly correlated electron systems using advanced
triple-axis spectrometers
究所

Yusuke Nambu

Tohoku University

鳴海

康雄

東北大学

金属材料研究所

Developments of pulse magnets for synchrotron and neutron
experiments in pulsed high magnetic fields

Yasuo Narumi

Tohoku University

担当所員：金道46

浩一

強磁場量子ビーム科学のためのパルスマグネッ
トの開発

担当所員：辛埴

ISSP Activity Report 20146347

高温超伝導体の高分解能光電子分光

藤森

淳

東京大学

大学院理学系研 Ultra-high resolution photoemission spectroscopy on high Tc
superconductor
究科

Atsushi Fujimori

The University of
Tokyo

48

60-eV レーザーを用いた時間分解光電子分光の
開発

石坂

香子

東京大学

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

Kyoko Ishizaka

The University of
Tokyo

49

鉄系超伝導体のレーザー光電子分光

下志万

東京大学

大学院工学系研
Laser-ARPES on Fe superconductor
究科

Takahiro Shimojima

The University of
Tokyo

50

Bi 系超伝導体の角度分解光電子分光竹内恒博

豊田工業大学

Tsunehiro Takeuchi

Toyota Technological
Institute51

高分解能光電子分光による強相関物質の研究

横谷

尚睦

岡山大学

大学院自然科学
Ultra-high resolution study on strongly correlated materials
研究科

Takayoshi Yokoya

Okayama University

52

酸化バナジウムの高分解能光電子分光

江口

律子

岡山大学

大学院自然科学
Photoemission study on vanadium oxides
研究科

Ritsuko Eguchi

Okayama University

53

有機化合物の光電子分光

金井要

東京理科大学

理工学部

Kaname Kanai

Tokyo University of
Science54重い電子系ウラン化合物の高分解能光電子分光

藤森伸一

日本原子力研究 量子ビーム応用 Ultra high resolution photoemission study on heavy fermion
Uranium compounds
開発機構
研究部門

Shinichi FujimoriJapan Atomic Energy
Agency55

レーザー光電子分光による酸化物薄膜の研究

津田俊輔

物質・材料研究機構

Shunsuke Tsuda

National Institute forMaterials Science

貴博

Angle-resolved photoemission study on high Tc cuprate

Photoemission study on organic compounds

Laser-photoemission study on oxide films

64

No．

課題名

氏名

所属

Title

ISSP Activity Report 2014

56

４ｆ電子系物質の高分解能光電子分光

松波雅治

自然科学研究機
分子科学研究所 Photoemission study on 4f materials
構57

超高空間分解能光電子顕微鏡による磁区構造観
察

中川

剛志

九州大学

58

Mn 化合物の時間分解光電子分光

大川

万里生

59

極低温・超高分解能光電子分光を用いた超伝導
機構の研究

岡﨑

60

収差補正型光電子顕微鏡の建設と利用研究

小嗣

61

時間分解・マイクロビームラインの開発と研究室

62

光電子分光法を用いた各種分子性結晶の電子状態の研究及び装置の低温化

木須

孝幸

大阪大学

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

理工学部

担当所員：松田Name

Organization

Masaharu
Matsunami

National Institutes of
Natural Sciences

大学院総合理工 Observation of magnetic domain structures by ultra-highresolution photoemission electron microscopy
学府

Takeshi Nakagawa

Kyushu University

東京理科大学

理学部

Mario Okawa

Tokyo University of
Science

浩三

東京大学

大学院理学系研 Study of the mechanism of superconductivity by low
temperature and high resolution photoemission spectroscopy
究科

Kozo Okazaki

The University of
Tokyo

真人

高輝度光科学研究センター

Construction and utilization research of aberration correction
photoelectron emission microscopy

Masato Kotsugi

Japan Synchrotron
Radiation Institute隆桂之

高輝度光科学研究センター

Development of micro- and time-resolved beamline

Takayuki Muro

Japan Synchrotron
Radiation InstituteTakayuki Kisu

Osaka University

Hiroshi Kondoh

Keio University

Kenta Amemiya

KEK

Taichi Okuda

Hiroshima University

Time resolved photoemission on Mn compounds

巌Study of surface dynamics by time-resolved photoemission
spectroscopy with high-brilliant soft x-ray synchrotron
radiation63

高輝度放射光軟 X 線を用いた時間分解光電子分
光による表面ダイナミクス研究近藤寛

慶應義塾大学64

軟 X 線アンジュレータビームラインの分光光学系の開発研究雨宮健太

高エネルギー加 物質構造科学研
Research and development of soft X-ray undulator beamline
速器研究機構究所

65

光電子スピン検出器の開発・研究

奥田

太一

広島大学

66

光電子顕微鏡による磁性ナノ構造物質の磁化過
程

木下

豊彦

高輝度光科学研究センター

67

高輝度軟 X 線を利用した強相関物質の電子状態
研究

組頭

広志

高エネルギー加 物質構造科学研 Study of electronic states in strongly correlated materials withhigh brilliant soft-Xray
速器研究機構究所

68

時間分解光電子分光法による光触媒材料のキャ
リアダイナミクス研究小澤健一

東京工業大学

大学院理工学研 Study of carrier dynamics in photocatalysis materials by timeresolved photoemission spectroscopy
究科

Kenichi Ozawa

Tokyo Institute ofTechnology

69

軟 X 線時間分解分光実験による磁性研究

木村

昭夫

広島大学

大学院理学研究 Study of magnetic properties by time-resolved soft X-ray
spectroscopy
科

Akio Kimura

Hiroshima University

70

高輝度軟 X 線を利用する光電子顕微鏡装置の設
計・開発

坂本

一之

千葉大学

大学院融合科学 Research and designing of a PEEM spectrometer for highbrilliance soft X ray
研究科

Kazuyuki Sakamoto

Chiba University71

二次元表示型スピン分解光電子エネルギー分析
器の開発

大門

寛

奈良先端科学技 物質創成科学研 Development of 2D display type spin resolved photoelectronenergy analyzer
術大学院大学
究科

Hiroshi Daimon

Nara Instituteof Science andTechnology

放射光科学研究 Research and development of a new photoelectron spin
detector
センター

Magnetization in process of magnetic nano structure by PEEM Toyohiko Kinoshita

Japan Synchrotron
Radiation Institute

Hiroshi Kumigashira KEK

No．
72

課題名
時間分解光電子回析実験の要素技術開発担当所員：原田

氏名
林

好一

所属
東北大学

金属材料研究所

Title
Technical development of time-resolved photoelectron
diffraction experiment

Name

Organization

Koichi Hayashi

Tohoku University

慈久

ISSP Activity Report 201473

軟 X 線吸収／発光分光法によるリチウムイオン
電池電極材料の電子物性研究

細野英司

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

Eiji Hosono

National Institute ofAdvanced Industrial
Science and Technology

74

〃

朝倉

大輔

産業技術総合研 エネルギー技術
究所
研究部門

Daisuke Asakura

National Institute ofAdvanced Industrial
Science and Technology

75

超高分解能軟 X 線発光分光による水素吸蔵合金
中の水素の波動関数の局在性に関する研究

関場

大一郎

筑波大学

数理物質系

Study on the localization of wave functions of hydrogen atom
in hydrogen storage alloys using ultrahigh resolution soft X-ray Daiichiro Sekiba
emission spectroscopy

University of Tsukuba

76

時間分解光電子分光による重い電子系の研究

関山

明

大阪大学

大学院基礎工学 Study on heavy Fermion materials by time-resolved
photoemission
研究科

Akira Sekiyama

Osaka University

77

高分解能光電子分光による酸化バナジウムの研
究

藤原

秀紀

大阪大学

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

Hidenori Fujiwara

Osaka University78

軟 X 線発光・共鳴非弾性散乱分光の磁気円・線二色性測定システムの構築

菅

大阪大学

産業科学研究所

Shigemasa Suga

Osaka University

79

極小角Ｘ線散乱と軟Ｘ線吸収・発光分光の融合によるソフトマテリアルの物性研究

雨宮

慶幸

東京大学

Study on the physical properties of soft materials by a
大学院新領域創
combination of ultra-small-angle X-ray scattering and soft
成科学研究科
X-ray absorption/emission spectroscopy

Yoshiyuki Amemiya

The University of
Tokyo

80

二次元原子薄膜トランジスタの電子状態のナノ
分析 (I)

吹留

博一

東北大学

電気通信研究所 Nanoscale analysis of electronic states of graphene device

Hirokazu Fukidome

Tohoku University

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

東北大学

多元物質科学研 Operando analysis of the electronic structure of actual devices
Naoka Nagamura
by 3DnanoESCA
究所

滋正

〃

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

担当所員：和達
81

Tohoku University

一般研究員 / General Researcher
No．

課題名

担当所員：榊原

氏名

所属

Title

Name

Organization

俊郎

65

1

CuO2 リボン鎖系 Cs2Cu2Mo3O12 の磁気的基底
状態

安井

幸夫

明治大学

理工学部

2

パイロクロア磁性体 Tb2-xTi2+xO7 の比熱測定

高津浩

首都大学東京大学院理工学研 Specific heat measurements of the pyrochlore magnet
Tb2-xTi2+xO7
究科

Magnetic Ground State of CuO2 ribbon Chain system
Cs2Cu2Mo3O12

Yukio Yasui

Meiji University

Hiroshi Takatsu

Tokyo Metropolitan
University

66

No．

課題名

3

〃

ISSP Activity Report 20144

強相関伝導系のパルス磁場中の超音波測定

氏名

所属

Title

Name

Organization〃

Mika Wakita

Tokyo Metropolitan
University

脇田美香

首都大学東京大学院理工学研
究科

吉澤

正人

岩手大学

大学院工学研究 Ultrasonic measurements of strongly correlated electron
systems in pulsed magnetic field科

Masahito Yoshizawa

Iwate University

Naoya Akasaka

Iwate University

Makoto Yokoyama

Ibaraki University

Kenji Fujimura

Ibaraki University

5

〃

赤坂

直哉

岩手大学

大学院工学研究科

6

強相関電子系化合物の秩序相に対する結晶対称性および軌道縮退の効果

横山

淳

茨城大学

理学部

7

〃

藤村

健司

茨城大学

大学院理工学研究科

極低温磁化測定による SmRh2Zn20 の磁場誘起相
加瀬
転移の検証

直樹

新潟大学

大学院自然科学 Study of field-induced order of SmRh2Zn20 by low-temperature
Naoki Kase
magnetization measurements
研究科

Niigata University

Kinami Adachi

Niigata University

8〃
Effects of crystal symmetry and orbital degeneracy in orderedstates of strongly correlated electron systems
〃

9

〃

安達

季並

新潟大学

大学院自然科学研究科

10

重い電子系超伝導体の対関数の対称性決定理論

町田

一成

岡山大学

大学院自然科学 Theoretical studies of pair symmetry in heavy fermion
superconductors
研究科

Kazushige Machida

Okayama University

11

有機ラジカルを用いた新規磁性体の低温磁気測
定

山口

博則

大阪府立大学

大学院理学系研 Low temperature magnetic properties of new organic radical
compounds
究科

Hironori Yamaguchi

Osaka Prefecture
University

12

〃

岩瀬

賢治

大阪府立大学

大学院理学系研
究科〃

Kenji Iwase

Osaka Prefecture
University

13

〃

菊地

健太郎

大阪府立大学

大学院理学系研
究科〃

Kentaro Kikuchi

Osaka Prefecture
University

14

高圧合成法による新規パイロクロア型遷移金属
化合物の探索

有馬

孝尚

東京大学

大学院新領域創 Exploration of new transition metal compounds of pyrochlore
structure by means of high-pressure syntheses
成科学研究科Taka-hisa Arima

The University of
Tokyo

15

〃

阿部

伸行

東京大学

大学院新領域創成科学研究科Nobuyuki Abe

The University of
Tokyo

16

高圧合成法による新規パイロクロア型遷移金属
化合物の探索

鷲見

浩樹

東京大学

大学院新領域創 Exploration of new transition metal compounds of pyrochlore
structure by means of high-pressure syntheses
成科学研究科

Hiroki Sumi

The University of
Tokyo

豊

東邦大学

理学部

Yutaka Nishio

Toho University

翔太

東邦大学

大学院理学研究
科

Shota Yamada

Toho University

担当所員：森
17
18

〃

〃

初果

プロトン - 電子相関系分子性導体における重水素
西尾
効果
〃

山田

Deuteration effect of proton-electron correlated molecular
Conductor〃

ISSP Activity Report 2014

No．

課題名

19

水素結合型分子性機能物質における重水素効果の理論的解析

立川仁典

横浜市立大学

20

〃

兼松

佑典

横浜市立大学

21

〃

緒方

勇大

横浜市立大学

大学院生命ナノシステム科学研究科

22

鉄錯体からなる分子性導電体の磁気・光物性研
究

松田

真生

熊本大学

23

〃

西

24

熱耐久性を有する高性能塗布型有機トランジス
タ材料の開発

岡本

25

〃

三津井

26

〃

山岸

27

〃

28
29

Title

大学院生命ナノ
Theoretical analysis of deuterated effect on hydrogen-bonded
システム科学研
molecular materials
究科

Name

Organization

67

Yokohama City
University〃

Yusuke Kanematsu

Yokohama City
University〃

Yudai Ogata

Yokohama City
University

大学院自然科学 Studies on magnetic and optical properties of molecular
conductors coposed of a Fe complex
研究科

Masaki Matsuda

Kumamoto University

熊本大学

大学院自然科学研究科

Miki Nishi

Kumamoto University

東京大学

大学院新領域創 Development of solution-processable high performance organic
Toshihiro Okamoto
semiconductos with thermal durability
成科学研究科The University of
Tokyo

東京大学

大学院新領域創成科学研究科〃

Chikahiko Mitsui

The University of
Tokyo

正和

東京大学

大学院新領域創成科学研究科〃

Masakazu Yamagishi

The University of
Tokyo

吉本

和美

東京大学

大学院新領域創成科学研究科〃

Kazumi Yoshimoto

The University ofTokyo

強相関パラメーターを制御した拡張および縮小
π 系分子性伝導体の物質合成と物性研究

白旗

崇

愛媛大学

Synthesis and properties of new molecular conductors based
大学院理工学研
on extended and reduced π-electron donors, in which
究科
electron correlation parameters are controlled

Takashi Shirahata

Ehime University

〃

古田

圭介

愛媛大学

大学院理工学研
究科

Keisuke Furuta

Ehime University

13C NMR による有機三角格子物質の基底状態の
清水
研究

康弘

名古屋大学

大学院理学研究 13C NMR study for the ground state of the organic triangularlattice科

Yasuhiro Shimizu

Nagoya University

静岡大学

大学院理学研究 Electrical resistivity measurements in CeAl2 by dilution
refrigerator
科

Takao Ebihara

Shizuoka University

大学院理学研究科

Masato Tsuchiya

Shizuoka University

Takashi Honda

KEK

担当所員：中辻
31

所属

Masanori Tachikawa

担当所員：瀧川
30

氏名

美樹
敏宏
親彦

大学院生命ナノシステム科学研
究科

〃

〃

仁

知

CeAl2 の臨界磁場近傍での低温電気抵抗測定

海老原

孝雄

32

〃

土屋

政人

静岡大学

33

Si 置換 Mn2GeO4 における新奇マルチフェロイ
ック特性の起源解明本田孝志

高エネルギー加 物質構造科学研 Study on the origin of unusual multiferroicity in Si-substituted
Mn2GeO4速器研究機構
究所

〃

68

No．

課題名

担当所員：上田

ISSP Activity Report 2014

34

所属

Title

Name

Organization

Shin Miyahara

Fukuoka University

和夫

コランダム構造における量子相転移

担当所員：常次
35

氏名

宮原

慎

福岡大学

理学部

御領

潤

弘前大学

大学院理工学研
Novel phenomena in electronic condensed matter systems
究科

Jun Goryo

Hirosaki University

Quantum phase transition in corundum structure

宏一

電子凝縮系における新奇現象

担当所員：リップマー

ミック

36

ダブルペロブスカイト酸化物薄膜における秩序構造制御とその輸送・誘電特性評価

北村

未歩

東京大学

大学院工学系研 Control of ordered-structure and evaluations of transport anddielectric properties in double perovskite oxide films
究科

Miho Kitamura

The University of
Tokyo

37

パルスレーザー堆積法による多成分系ナノ相分
離酸化物薄膜の構造と物性

松本

祐司

東北大学

大学院工学研究 Structural and material-property characterization of multicomponent oxide lms with nano-scale phase separation
科

Yuji Matsumoto

Tohoku University

38

〃

丸山

伸伍

東北大学

大学院工学研究科

Shingo Maruyama

Tohoku University

39

太陽電池用シリコンプロセスにおける触媒効果

伊高

健治

弘前大学

北日本新エネル Catalysis effect on the direct silica reduction process for solar
cells
ギー研究所

Kenji Itaka

Hirosaki University

靖洋

埼玉大学

工学部

Experiment of quantum oscillations by Bi nanowire

Yasuhiro Hasegawa

Saitama University

担当所員：家40〃

泰弘

Bi ナノワイヤーにおける量子振動実験

担当所員：吉信

長谷川

淳

41

HREELS によるグラファイト・グラフェンにおける電子格子散乱の直接測定

田中

慎一郎

大阪大学

産業科学研究所

Direct measurement for the electron-phonon scattering ingraphite and graphite using HREELS

Shin-ichiro Tanaka

Osaka University42

Ag(110) 上に作成した TiO2 単結晶薄膜の STM
観察

枝元

一之

立教大学

理学部

STM study of the TiO2 single-crystal film on Ag(110)Kazuyuki Edamoto

Rikkyo University43

Ag（111）表面に合成したシリセンの格子ダイ
ナミクスに関する研究

高木

紀明

東京大学

大学院新領域創
Lattice dynamics of silicene grown on Ag(111)
成科学研究科

Noriaki Takagi

The University of
Tokyo

河村

紀一

日本放送協会

放送技術研究所

担当所員：小森44

文夫

金属／半導体表面上ナノ構造の形成とその光学
応答の時間分解測定

Time resolved spectroscopy of optical responses from nanostructures on metal / semiconductor surfaces

NHK Science &Norikazu Kawamura Technical ResearchLaboratories

No．

課題名

45

再放出低速陽電子による酸化物表面近傍の欠陥の動的研究

担当所員：長谷川

氏名

所属

Title

Name

Study of the dynamics of defects near the surface of oxides by
Masuaki Matsumoto
reemitted slow positron

松本

益明

東京学芸大学

教育学部

大学院工学研究 High-bias stability of gold single-atom contacts undercompressive stresses
科

Organization
Tokyo Gakugei
University幸雄

46

圧縮応力下における金単原子接点の高バイアス
安定性

酒井

明

京都大学

47

二ホウ化物薄膜上のエピタキシャルシリセン及びゲルマニウム層の低温走査トンネル顕微鏡観
察

高村

由起子

Low temperature scanning tunneling microscopy investigations
北陸先端科学技 マテリアルサイof epitaxial silicene and germanium layer on diboride thin
Yukiko Takamura
術大学院大学
エンス研究科films

Japan Advanced
Institute of Scienceand Technology

48〃

アントワーヌフロランス

北陸先端科学技 マテリアルサイ術大学院大学
エンス研究科〃

Antoine Fleurence

Japan Advanced
Institute of Scienceand Technology

49

〃

青柳

航平

北陸先端科学技 マテリアルサイ術大学院大学
エンス研究科〃

Kohei Aoyagi

Japan Advanced
Institute of Scienceand Technology50

圧縮応力下における金単原子接点の高バイアス
安定性

若杉

晋作

京都大学

大学院工学研究 High-bias stability of gold single-atom contacts undercompressive stresses
科

Shinsaku Wakasugi

Kyoto University

繁岡

透

山口大学

大学院理工学研 Pressure effect on magnetic transitions of (Ho,Y)Rh2Si2 single
crystal
究科

Toru Shigeoka

Yamaguchi University

藤井

洋

山口大学

大学院理工学研
究科

Yoh Fujii

Yamaguchi University

惠三大阪市立大学

大学院理学研究 Search of generalization of field-induced phase of CDW
organic conductor
科

Keizo Murata

Osaka City University

平山

光

大阪市立大学

大学院理学研究
科

Hikaru Hirayama

Osaka City University

藤原

哲也

山口大学

大学院理工学研 Magnetization measurements of EuCo2P2 under high pressures
Tetsuya Fujiwara
II
究科

Yamaguchi University

田端

克好

山口大学

大学院理工学研
究科

Katsuyoshi Tabata

Yamaguchi University

藤原

哲也

山口大学

大学院理工学研
Single crystal growth of LaFe2-xMn2Ge2
究科

Tetsuya Fujiwara

Yamaguchi University

中田

琢也

山口大学

大学院理工学研
究科

Takuya Nakada

Yamaguchi University

小山

佳一

鹿児島大学

大学院理工学研 Magnetization measurement of Mn based compounds underhigh pressure
究科

Keiichi Koyama

Kagoshima University

担当所員：上床51
52

ISSP Activity Report 2014

53
54
55
56
57
58

69

59

Akira Sakai

Kyoto University

美也(Ho,Y)Rh2Si2 単結晶の磁気転移の圧力効果〃

CDW 有機伝導体の圧力下磁場誘起相の普遍化の村田
探索〃
EuCo2P2 の高圧力下磁化測定 (2)〃LaFe2-xMnxGe2 の単結晶育成〃
Mn 基磁気一次相転移物質の高圧下磁化測定

〃

〃

〃

〃

70

No．

課題名

60

〃

ISSP Activity Report 2014

61

氏名

所属

吉峰

裕貴

鹿児島大学

大学院理工学研
究科

Ni-Mn-Ga 系強磁性形状記憶合金の磁化の圧力依
安達
存性

義也

山形大学

Title
〃

Name
Yuki Yoshimine

Kagoshima University

大学院理工学研 Pressure dependence of magnetization for the ferromagnetic
shape-mem ory alloys of Ni-Mn-Ga system
究科

Yoshiya Adachi

Yamagata University

Daichi Ikeda

Yamagata University

62

〃

池田

大地

山形大学

大学院理工学研
究科

63

Pr 系銅酸化物及びその関連物質における超伝導
の圧力効果

久田

旭彦

徳島大学

大学院ソシオ・ア
Pressure effects on superconductivity in Pr-based copper oxide
ーツ・アンド・サ
Akihiko Hisada
and related materials
イエンス研究部

64

YbCo2Zn20 置換系物質の基本物性評価

阿曽

尚文

琉球大学

理学部

比嘉

泰之

琉球大学

大学院理工学研
究科

藤原

哲也

山口大学

中田

琢也

カゴ状構造を有する超伝導体 Sc5Rh6Sn18 の高圧
加瀬
下電気抵抗測定

65
66
67
68

〃
YbMn2Ge2 の高圧力下磁化測定〃

Organization〃

Evaluation of fundamental physical properties in doped
YbCo2Zn20

The University ofTokushima

Naofumi Aso

University of the
Ryukyus

Yasuyuki Higa

University of the
Ryukyus

大学院理工学研 Magnetization measurements under high pressures inYbMn2Ge2
究科

Tetsuya Fujiwara

Yamaguchi University

山口大学

大学院理工学研
究科

Takuya Nakada

Yamaguchi University

直樹

新潟大学

大学院自然科学 Electrical resistivity measurements under high pressure of
Sc5Rh6Sn18 with caged structure
研究科

Naoki Kase

Niigata University

〃

〃

69

〃

鈴木

陽史

新潟大学

大学院自然科学研究科〃

Harufumi Suzuki

Niigata University

70

〃

新井

宏典

新潟大学

大学院自然科学研究科〃

Hironori Arai

Niigata University

セリウムおよびユーロピウム化合物 R2T3Ge5 (R:中島
Ce, Eu) の高圧下物性

美帆

信州大学

理学部

Miho Nakashima

Shinshu University

Tomoya Okazaki

Shinshu University

Magnetization studies under pressure in Ce-based compoundswith small magnetic moments II

Naofumi Aso

University of the
Ryukyus71

Physical properties of cerium and europium coumpound
R2T3Ge5 (R: Ce, Eu) under high pressure

72

〃

岡崎

友哉

信州大学

大学院理工学系
研究科

73

セリウム系化合物における微小磁気モーメントの圧力下磁化測定 II

阿曽

尚文

琉球大学

理学部

74

〃

比嘉

泰之

琉球大学

大学院理工学研
究科〃

Yasuyuki Higa

University of the
Ryukyus

75

〃

藤原

哲也

山口大学

大学院理工学研
究科〃

Tetsuya Fujiwara

Yamaguchi University

76

ホイスラー化合物 Ni2MnGa の高圧下電気抵抗

伊藤

昌和

鹿児島大学

大学院理工学研
Electrical resistivity of Heusler alloy Ni2MnGa in high pressure Masakazu Ito
究科〃

Kagoshima University

No．

課題名

氏名

所属

Title

Name

Organization

77

ホイスラー合金 Pd2MnIn の反強磁性とマルテン
岡田
サイト変態の圧力効果

宏成

東北学院大学工学部

78

圧力下における CeSe の磁気相転移と近藤効果

松村

武

広島大学

大学院先端物質
Magnetic order and Kondo effect in CeSe under high pressure
科学研究科

Takeshi Matsumura

Hiroshima University

79

〃

林

佑弥

広島大学

大学院先端物質科学研究科

Yuya Hayashi

Hiroshima University

80
81
82

圧力誘起価数転移の探索と高圧下輸送特性〃
価数揺動物質の高圧力中輸送特性の研究

辺土

正人

琉球大学

理学部

垣花

将司

琉球大学

大学院理工学研
究科

仲間

隆男

琉球大学

理学部

Pressure effect on antiferromagnetic and martensitic transition
Hironari Okada
in Heusler alloy Pd2MnIn〃

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

Tohoku Gakuin
University

University of the
Ryukyus

Masashi Kakihana

University of the
RyukyusTransport properties of valence fluctuating compounds underpressure

Takao Nakama

University of the
Ryukyus〃

ISSP Activity Report 2014

83

〃

仲村

愛

琉球大学

大学院理工学研
究科〃

Ai Nakamura

University of the
Ryukyus

84

〃

赤嶺

拡

琉球大学

大学院理工学研
究科〃

Hiromu Akamine

University of the
Ryukyus85

回転希釈冷凍機を用いた量子固体・量子液体研
究

白濱

圭也

慶應義塾大学

理工学部

Studies of quantum fluids and solids using rotating dilution
refrigerators

Keiya Shirahama

Keio University

86

希土類磁性体の異方的磁気体積効果

大橋

政司

金沢大学

理工研究域

Anisotropic magnetovolume effect of rare earth compounds

Masashi Ohashi

Kanazawa University

立野

翔大

金沢大学

大学院自然科学研究科

Shota Tateno

Kanazawa University

強磁性体 RCu9Sn4(R: 希土類 ) の圧力下電気抵抗
広瀬
測定

雄介

新潟大学

理学部

Yusuke Hirose

Niigata University

87
88

〃

〃
Electrical resistivity measurement of ferromagnet RCu9Sn4(R:rare earth) under high pressure

71

89

〃

倉橋

秀平

新潟大学

大学院自然科学研究科〃

Shuhei Kurahashi

Niigata University

90

〃

都丸

駿

新潟大学

大学院自然科学研究科〃

Shun Tomaru

Niigata University

91

強相関型セリウム化合物および合金の量子相転
移と磁性

村山

茂幸

室蘭工業大学

大学院工学研究 Quantum phase transition and magnetism in the strongly
correlated Ce compounds and alloys
科

Shigeyuki Murayama

Muroran Institute ofTechnology

92

〃

雨海

有佑

室蘭工業大学

大学院工学研究科〃

Yusuke Amakai

Muroran Institute ofTechnology

93

〃

荒川

恵理

室蘭工業大学

大学院工学研究科〃

Eri Arakawa

Muroran Institute ofTechnology

72
ISSP Activity Report 2014

No．

課題名

94

固体ヘリウム４の界面近傍におけるずれ弾性測
定

青木

悠樹

東京工業大学

大学院総合理工 Shear modulus measurement of solid helium-4 at nearinterface
学研究科

Yuki Aoki

Tokyo Institute ofTechnology

95

〃

岩佐

泉

神奈川大学

理学部

Izumi Iwasa

Kanagawa University

96

固体ヘリウムの超流動に見られる様な「新規超流動現象の基礎研究」

久保田

芝浦工業大学総合研究所

Fundamental study of new types of superfluidity, as seen insolid 4He

Minoru Kubota

Shibaura Institute ofTechnology

97

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

金属材料研究所

Investigation of valence transition on Eu compounds underhigh pressure

Fuminori Honda

Tohoku University

大貫

惇睦

琉球大学

理学部

Yoshichika Onuki

University of the
Ryukyus99

三角格子磁性体
NaM(Acac)3benzen(M=Fe,Ni,Co,Mn) の低温磁 柄木
性

良友

琉球大学

教育学部

Yoshitomo Karaki

University of the
Ryukyus100

磁化測定用対向アンビル型高圧力発生装置の開
発 (4)

藤原

哲也

山口大学

大学院理工学研 Development of opposed-anvil type high pressure apparatus
for magnetization measurement IV
究科

Tetsuya Fujiwara

Yamaguchi University

101

〃

田端

克好

山口大学

大学院理工学研
究科

Katsuyoshi Tabata

Yamaguchi University

大橋

政司

金沢大学

理工研究域

Masashi Ohashi

Kanazawa University

Nobuya Kishii

Kanazawa University

98〃

102 磁性単層膜の電気伝導

氏名

実

所属

Title

〃

〃
Low temperature magnetizm of triangular lattice
antiferromagnet NaM(acac)3benzen〃
Electronic transport properties of magnetic monolayer

Name

Organization

103

〃

岸井

信也

金沢大学

大学院自然科学研究科

104

重い電子系反強磁性体 CeNiIn4 の高圧下電子状
態の研究

松本

裕司

名古屋工業大学

大学院工学研究 The study of electronic state for antiferromagnet heavy
fermion CeNiIn4 under high pressure科

Yuji Matsumoto

Nagoya Institute ofTechnology

105

〃

浅野

雄平

名古屋工業大学

大学院工学研究科

Yuhei Asano

Nagoya Institute ofTechnology

106

重い電子系物質における 3He 温度領域での磁化
測定

佐藤

由昌

九州大学

大学院工学府Magnetization measurements in 3He temperature region forheavy fermion systems

Yoshiaki Sato

Kyushu University

107 正方晶の V2Ga5 の圧力下の輸送特性

仲間

隆男

琉球大学

理学部

Transport properties of the single crystal V2Ga5 with tetragonal
Takao Nakama
structure

108

〃

照屋

淳志

琉球大学

大学院理工学研
究科〃

Atsushi Teruya

University of the
Ryukyus

109

〃

上門

太郎

琉球大学

大学院理工学研
究科〃

Taro Uejyo

University of the
Ryukyus

繁岡

透

山口大学

大学院理工学研 Magnetic transition of polymorphic compound RIr2Si2 (R=rera
Toru Shigeoka
earth)2
究科

110 多形化合物 RIr2Si2(R= 希土類）の磁気転移 2〃〃

University of the
Ryukyus

Yamaguchi University

No．

課題名

氏名

所属

111

〃

森田

哲広

山口大学

大学院理工学研
究科

112

多重極限下のゼーベック係数測定システムの開
発

辺土

正人

琉球大学

理学部

113

〃

友利

圭佑

琉球大学

大学院理工学研
究科

114

超流動 He-3,A1 相中のジョセフソン接合の作成と量子干渉効果の検出山口明

兵庫県立大学115 超流動ヘリウム 3-A 相の半整数量子渦の検出

石川

修六

116

國松

Title

Organization

Tetsuhiro Morita

Yamaguchi University

Development of new Seebeck coefficient measurement system
under multiple extreme conditions

Masato Hedo

University of the
Ryukyus〃

Keisuke Tomori

University of the
Ryukyus

大学院物質理学 Development of Josephson device and search for novel
quantum interference effects in superfluid He-3 A1 phase
研究科

Akira Yamaguchi

The Univerisity ofHyogo

大阪市立大学

大学院理学研究 Investigation of the half quantized vortex in superfluid 3He-A
phase
科

Osamu Ishikawa

Osaka City University

貴之

大阪市立大学

大学院理学研究
科

Takayuki Kunimatsu Osaka City University

117 超流動ヘリウム A1 相におけるジョセフソン効果 白濱圭也

慶應義塾大学

理工学部

導電性ラングミュア・ブロジェット膜の高圧下の電気的性質に関する研究

三浦康弘

桐蔭横浜大学

鳥塚

潔

法政大学

理工学部

Co 基ホイスラー合金における圧力誘起マルテン
重田
サイト変態に関する研究

出

鹿児島大学

大学院理工学研 Study on pressure-induced martensitic phase transformation in
Iduru Shigeta
Co-based Heusler alloys
究科

Kagoshima University

藤本

祐太郎

鹿児島大学

大学院理工学研
究科

Yutaro Fujimoto

Kagoshima University

中村修

岡山理科大学

学外連携推進室 Transport properties of Yb4As3 under high pressure

Osamu Nakamura

Okayama University of
Science

Daisuke Takahashi

Ashikaga Institute ofTechnology

118〃

119 有機分子性導体の高圧物性の研究
120

ISSP Activity Report 2014121〃

122 高圧下での Yb4As3 の電気抵抗測定

〃

Name

〃
Josephson effect in superfluid He-3 A1 phase

Keiya Shirahama

Keio University

大学院工学研究 Studies on electrical properties of conductive langmuirblodgett films under high pressure
科

Yasuhiro Miura

Toin University of
Yokohama

Studies on high pressure properties of organic molecular
conductors

Kiyoshi Torizuka

Hosei University〃

123

回転希釈冷凍機を用いた量子固体・量子液体研
究

高橋

大輔

足利工業大学

共通過程

124

〃

村川

智

慶應義塾大学

理工学部〃

Satoshi Murakawa

Keio University

125

〃

立木

智也

慶應義塾大学

大学院理工学研
究科〃

Tomoya Tsuiki

Keio University

丹羽

健

名古屋大学

大学院工学研究High pressure synthesis of 3d transition metal pernitride科

Ken Niwa

Nagoya University

担当所員：廣井Studies of quantum fluids and solids using rotating dilution
refrigerators

善二

73

126 3d 遷移金属多窒化物の高圧合成

74
ISSP Activity Report 2014

No．

課題名

氏名

127

〃

寺部

俊紀

名古屋大学

大学院工学研究科

128

マルチフェロイック特性を有する新規ペロブス
カイト型酸化物の高圧合成

丹羽

健

名古屋大学

129

〃

志村

元

130

下部マントル条件において、水素がケイ酸塩鉱物の相関係に与える影響

篠崎

131

空間反転対称性のない結晶構造を有する新超伝導体の物質探索

関根

132

〃

崔

133

高圧下におけるベンゼンからの多環芳香族炭化水素の生成条件

篠崎

Title

Name

Organization〃

Toshiki Terabe

Nagoya University

大学院工学研究 High pressure synthesis of new multiferroic oxides withperovskite-type structure科

Ken Niwa

Nagoya University

名古屋大学

大学院工学研究科

Gen Shimura

Nagoya University

彩子

東京大学

大学院理学系研 Influence of H2 fluid on the stability of silicate minerals underlower mantle condition
究科

Ayako Shiozaki

The University of
Tokyo

ちひろ

室蘭工業大学

大学院工学研究 Search for new superconductors with noncentrosymmetricstructure
科

Chihiro Sekine

Muroran Institute ofTechnology

室蘭工業大学

大学院工学研究科

Un SaiMuroran Institute ofTechnology

東京大学

大学院理学系研 Formation of polycyclic aromatic hydrocarbons from benzene
under high pressure condition
究科

Ayako Shiozaki

The University of
Tokyo

正

名古屋大学

大学院工学研究High pressure syntheses of novel ion conductors
科

Masashi Hasegawa

Nagoya University

瑛一

名古屋大学

大学院工学研究科

Eiichi Hirose

Nagoya University

洋

京都大学

大学院工学研究
Pressure-induced amorphization of layered metal oxides
科

Hiroshi Kageyama

Kyoto University

云彩子

134 新規イオン伝導性化合物の超高圧合成

長谷川

135

廣瀬

136

〃

層状酸化物 HLaNb2O7 における圧力誘起アモル
陰山
ファス化

所属

〃

〃

〃

137

〃

山本

隆文

京都大学

大学院工学研究
科〃

Takafumi Yamamoto Kyoto University

138

〃

セドリック
タッセル

京都大学

白眉センター〃Cedric Tassel

Kyoto University

139

〃

村上

泰斗

京都大学

大学院工学研究
科〃

Taito Murakami

Kyoto University

140

核−マントル境界における金属鉄−ケイ酸塩メルト間の塩素分配に関する実験的研究

桑原

秀治

東京大学

大学院新領域創 An experimental study on metal-silicate partitioning of chlorine
Hideharu Kuwahara
at core-mantle boundary conditions
成科学研究科The University ofTokyo

担当所員：川島直輝

141

テンソルネットワーク変分法の数値アルゴリズ
ムの開発

原田

健自

京都大学

大学院情報学研 Development of numerical algorithm of tensor network
variational method
究科

Kenji Harada

Kyoto University

142

蜂の巣格子上反強磁性 Heisenberg-Kitaev 模型の磁気的性質鈴木隆史

兵庫県立大学

大学院工学研究 Magnetic properties of the antiferromagnetic HeisenbergKitaev model on a honeycomb lattice
科

Takafumi Suzuki

The Univerisity of
Hyogo

No．

課題名

担当所員：益田

氏名

所属

Title

Name

Organization

隆嗣

143 希土類化合物単結晶の物質評価

繁岡

透

山口大学

大学院理工学研
Characterization of rare earth single crystal compounds
究科

Toru Shigeoka

Yamaguchi University

144

〃

中田

琢也

山口大学

大学院理工学研
究科

Takuya Nakada

Yamaguchi University145

非磁性不純物による三角スピンチューブのスピ
ンダイナミクスの変化

真中

浩貴

鹿児島大学

大学院理工学研 Non-magnetic impurity effect on spin dynamics of triangularspin tubes
究科

Hirotaka Manaka

Kagoshima University

146

スピネル型バナジウム酸化物における磁気励起
の観測

阿部

伸行

東京大学

大学院新領域創Measurement of magnetic excitation in spinel type vanadate
成科学研究科Nobuyuki Abe

The University of
Tokyo

147

〃

松浦

慧介

東京大学

大学院新領域創成科学研究科

Keisuke Matsuura

The University of
Tokyo

148

高エネルギー X 線ラウエ法を用いたヘリカル磁性合金 Gd-RE (RE=Y,La) の単結晶試料の評価

山崎照夫

東京理科大学

理工学部

149

〃

栗原

舞

東京理科大学

大学院理工学研究科150 (Ho,Y)Rh2Si2 単結晶の磁気特性

繁岡

透

山口大学

151

藤井

洋

152 パイロクロア酸化物磁性体 Tb2Ti2O7 の比熱測定 高津
153

〃

〃

Evaluation of the single crystalline samples of helical magnetic
Teruo Yamazaki
alloys Gd-RE (RE=Y,La) by high-energy X-ray Laue method

Tokyo University of
Science

Mai Kurihara

Tokyo University of
Science

大学院理工学研
Magnetic characteristics of (Ho,Y)Rh2Si2 single crystal
究科

Toru Shigeoka

Yamaguchi University

山口大学

大学院理工学研
究科

Yoh Fujii

Yamaguchi University

浩

首都大学東京大学院理工学研
Specific heat measurements on a pyrochlore oxide Tb2Ti2O7
究科

Hiroshi Takatsu

Tokyo Metropolitan
University

布山直樹

首都大学東京大学院理工学研
究科

Naoki Nunoyama

Tokyo Metropolitan
University

154 金属ヘリカル磁性体 Gd1-xYx 合金の H-T 相図

山崎照夫

東京理科大学

理工学部

Teruo Yamazaki

Tokyo University of
Science

155

〃

栗原

舞

東京理科大学

大学院理工学研
究科

Mai Kurihara

Tokyo University of
Science(Cu,Zn)3(Mo,W)2O9 のパルス磁場中の熱力学的
性質

黒江

晴彦

上智大学

理工学部

担当所員：吉澤

ISSP Activity Report 2014

75

156

英樹

〃

〃

担当所員：金道〃〃〃H-T phase diagram of the metallic helimagnet Gd1-xYx〃

浩一
Thermodynamic properties in (Cu,Zn)3(Mo,W)2O9 under pulsed
Haruhiko Kuroe
magnetic fields

Sophia University

76

No．

課題名

氏名

所属

Title

Name

Organization

ISSP Activity Report 2014

157 (Ho,Gd)Rh2Si2 単結晶の高磁場磁化 2

繁岡

透

山口大学

大学院理工学研High field magnetization of (Ho,Gd)Rh2Si2 single crystal2
究科

Toru Shigeoka

Yamaguchi University

158

森田

哲広

山口大学

大学院理工学研
究科

Tetsuhiro Morita

Yamaguchi University

10MJ コンデンサーバンク用大型ワイドボアパル
萩原
スマグネットの開発

政幸

大阪大学

大学院理学研究 Development of a large wide-bore pulse magnet for a 10MJ
capacitor bank科

Masayuki Hagiwara

Osaka University

谷口

一也

大阪大学

大学院理学研究科

Kazuya Taniguchi

Osaka University

161 YbInCu4 の置換系における強磁場磁化過程

道岡

千城

京都大学

大学院理学研究
High-field magnetization in the substituted system of YbInCu4
科

Chishiro Michioka

Kyoto University

162

〃

今井

正樹

京都大学

大学院理学研究科〃

Masaki Imai

Kyoto University

163

〃

中東

太一

京都大学

大学院理学研究科〃

Taichi Nakahigashi

Kyoto University

164 カゴメ格子をもつ 3d 遷移金属フッ化物の磁性

植田

浩明

京都大学

大学院理学研究 Magnetic studies of 3d transition metal fluorides with akagome lattice科

Hiroaki Ueda

Kyoto University

165

〃

後藤

真人

京都大学

大学院理学研究科〃

Masato Goto

Kyoto University

166

〃

山川

智大

京都大学

大学院理学研究
科〃

Tomohiro Yamakawa Kyoto University

167 ホイスラー化合物 Ni2MnGa の強磁場磁化測定

伊藤

昌和

鹿児島大学

大学院理工学研
Magnetization of Heusler alloy Ni2MnGa in high magnetic field Masakazu Ito
究科

Kagoshima University

168 ホイスラー化合物の強磁場磁化

廣井

政彦

鹿児島大学

大学院理工学研 Magnetizaiton of some Heusler compounds in high magnetic
field
究科

Masahiko Hiroi

Kagoshima University

169

佐野

紘晃

鹿児島大学

大学院理工学研
究科

Hiroaki Sano

Kagoshima University

静岡大学

大学院理学研究 Physical phenomena at high magnetic fields in rear earth
intermetallic compounds
科

Takao Ebihara

Shizuoka University

Masato Tsuchiya

Shizuoka University

159
160

〃

〃

〃

孝雄

〃

〃

〃

170 希土類金属間化合物の強磁場物性研究

海老原

171

〃

土屋

政人

静岡大学

大学院理学研究科

172 金属ナノ結晶の磁化特性

稲田

貢

関西大学

システム理工学
Magnetic properties of metal nanocrystals部

Mitsuru Inada

Kansai University

173 高温超伝導体のパルス強磁場下輸送現象

掛谷

一弘

京都大学

大学院工学研究 Transport phenomena in high-Tc superconductors underpulsed high magnetic fields
科

Itsuhiro Kakeya

Kyoto University

〃

No．

課題名

174

高ドープ高温超伝導体のパルス強磁場下輸送現
象

渡辺

孝夫

弘前大学

大学院理工学研 Transport properties in heavily overdoped high-Tc
superconductors under pulsed high magnetic fields
究科

Takao Watanabe

Hirosaki University

175

〃

臼井

友洋

弘前大学

大学院理工学研
究科

Tomohiro Usui

Hirosaki University

176

新規 S=1/2 擬カゴメ格子磁性体の強磁場磁化過
程

浅野

貴行

福井大学

大学院工学研究 Magnetization process in novel S=1/2 pseudo-kagome latticemagnets科

Takayuki Asano

University of Fukui

177

〃

川見

洋一郎

九州大学

大学院理学府Yoichiro Kawami

Kyushu University

178 単結晶 LaCo1-xRhxO3 の強磁場誘起スピン転移佐藤桂輔

茨城工業高等専
門学校

Keisuke Sato

Ibaraki National
College of Technology

179

有機／無機スピン源を有する新規量子スピン系の強磁場磁化測定小野俊雄

大阪府立大学

大学院理学系研 High field magnetization measurements on the new quantum
spin systems with organic/inorganic spin sources
究科

Toshio Ono

Osaka Prefecture
University

180

〃

天谷

直樹

大阪府立大学

大学院理学系研
究科〃

Naoki Amaya

Osaka Prefecture
University

181

〃

菊地

健太郎

大阪府立大学

大学院理学系研
究科〃

Kentaro Kikuchi

Osaka Prefecture
University

182

〃

笠谷

和宏

大阪府立大学

大学院理学系研
究科〃

Kazuhiro Kasatani

Osaka Prefecture
University

183 固体酸素の磁場−温度相図の決定

小林

達生

岡山大学

大学院自然科学
Field-temperature phase diagram in solid oxygen
研究科

Tatsuo C. Kobayashi Okayama University

184 磁性強誘電体における強磁場下方向複屈折

有馬

孝尚

東京大学

大学院新領域創 Directional birefringence in magnetic ferroelectrics in a highmagnetic field
成科学研究科Takahisa Arima

The University of
Tokyo

185

阿部

伸行

東京大学

大学院新領域創成科学研究科Nobuyuki Abe

The University of
Tokyo

豊田

新悟

東京大学

大学院新領域創 Directional birefringence in magnetic ferroelectrics in a highmagnetic field
成科学研究科

Shingo Toyoda

The University of
Tokyo

黒江

晴彦

上智大学

理工学部

Magnetostriction-, magnetization-, and electric-polarizationmeasurements in (Cu,Zn)3(Mo,W)2O9 under pulsed magnetic
fieldsHaruhiko Kuroe

Sophia University

横浜国立大学

大学院工学研究 Antiferromagnetism and thermoelectric properties inPr1-xAxMnO3 (A=Ca or Sr)
院

Hiroshi Nakatsugawa

Yokohama National
University

担当所員：松田

所属

Title

〃

〃
Field induced spin-state transition in single crystal
LaCo1-xRhxO3

Name

Organization

康弘

ISSP Activity Report 2014〃

186 磁性強誘電体における強磁場下方向複屈折
担当所員：徳永

氏名

〃

将史

77

187

(Cu,Zn)3(Mo,W)2O9 のパルス磁場中の格子歪・磁化・電気分極測定

188

Pr1-xAxMnO3 (A=Ca or Sr) の反強磁性と熱電特中津川性に関する研究博

78
ISSP Activity Report 2014

No．

課題名

189

〃

窪田

正照

横浜国立大学

大学院工学府190

パイロクロア型イリジウム酸化物の強磁場下の
物性研究

松平

和之

九州工業大学

大学院工学研究 Transport and magnetic properties of pyrochlore iridates underKazuyuki Matsuhirahigh field magnetic field
院

Kyushu Institute ofTechnology

191

フラストレーションを有する磁性体の強磁場磁
化過程

香取

浩子

東京農工大学

大学院工学研究
High-field magnetization of frustrated magnets
院

Hiroko Katori

Tokyo Universityof Agriculture andTechnology

192

〃

斉藤

大地

東京農工大学

大学院工学府Daichi Saito

Tokyo Universityof Agriculture andTechnology

193 圧力誘起超伝導体 CePt2In7 の強磁場物性研究

摂待

力生

新潟大学

理学部

High-magnetic-field study of pressure-induced superconductor
Rikio Settai
CePt2In7

Niigata University

194

太田

俊平

新潟大学

大学院自然科学研究科

195 三元系コバルトニクタイドの強磁場磁化過程

太田寛人

東京農工大学

196

赤羽

栄介

〃

氏名

所属

Title

Name

〃

Masaki Kubota〃

Yokohama National
University

Shunpei Ota

Niigata University

大学院工学研究
Magnetic behavior of ternary cobalt pnictogen compounds
院

Hiroto Ohta

Tokyo Universityof Agriculture andTechnology

東京農工大学

大学院工学府Eisuke Akabane

Tokyo Universityof Agriculture andTechnology

超強磁場を利用した CoCr 基合金におけるリエン
197 トラント挙動を示すマルテンサイト変態の観察 キョキョウ
および起源解明東北大学

Observation and clarification of the origin of re-entrant
大学院工学研究
martensitic transformation using strong magnetic field in CoCr Xiao XU
科
based alloys

Tohoku University

198 電界誘起量子相の強磁場物性〃〃

Organization

〃

笠原

裕一

東京大学

大学院工学系研
High-field properties of electric-field-induced quantum phases
究科

Yuichi Kasahara

The University of
Tokyo

矢口

宏

東京理科大学

理工学部

Study of the high-magnetic-field-induced density-wave phasein graphite using non-destructive pulsed magnets

Hiroshi Yaguchi

Tokyo University of
Science199

非破壊パルスマグネットを用いたグラファイトの強磁場誘起密度波相の研究

200

正 20 面体対称クラスターを持つ複雑合金の磁化
廣戸
過程

孝信

東京理科大学

大学院基礎工学 Magnetization study on complex metallic alloys with
icosahedral symmetry cluster
研究科

Takanobu Hiroto

Tokyo University of
Science201

ビスマス正方格子を有する新規ディラック系層状物質における量子振動の観測

酒井

英明

東京大学

大学院工学系研 Observation of quantum oscillation for a Dirac metal with Bi
square nets
究科

Hideaki Sakai

The University of
Tokyo

202

マルチフェロイック物質 LiNiPO4 の非整合磁気秩序相における電気分極測定

木原

工

東北大学

金属材料研究所

Electric polarization measurements in incommensurate
magnetic ordered phase of the multiferroic material LiNiPO4

Takumi Kihara

Tohoku University

木村

昭夫

広島大学

大学院理学研究 Study of Dirac fermions in GeTe/Sb2Te3 superlattices by twophoton ARPES
科

Akio Kimura

Hiroshima University

広島大学

大学院理学研究 Study of Dirac ferimions in phase change materials Ge-Sb-Te
by two-photon ARPES
科

Zhu, Siyuan

Hiroshima University

担当所員：辛埴203

2 光子 ARPES を用いた GeTe/Sb2Te3 超構造におけるディラックフェルミオンの観測

204

２光子 ARPES を用いた相変化物質 Ge-Sb-Te お
朱けるディラックフェルミオンの観測

思源

No．

課題名

氏名

205

極性半導体の表面およびバルクにおける電子構
造

石坂

香子

206

空間反転対称性の破れたビスマス化合物超伝導体における電子構造

坂野207

新奇量子異常ホール系トポロジカル絶縁体の 2
光子 ARPES所属

Name

Organization

東京大学

大学院工学系研
Bulk and surface electronic structures of polar semiconductors Kyoko Ishizaka
究科

The University of
Tokyo

昌人

東京大学

大学院工学系研 Electronic structure of noncentrosymmetric bismuth compound
Masato Sakano
superconductor
究科

The University of
Tokyo

木村

昭夫

広島大学

大学院理学研究 Two photon ARPES of quantum anomalous Hall topologicalinsulators
科

Akio Kimura

Hiroshima University

希薄磁性半導体 GaGdAs 単層ならびに GaGdAs/
208 GaAa 超格子の界面および結晶構造に及ぼす成長 宮川
条件の影響

勇人

香川大学

工学部

Hayato Miyagawa

Kagawa University

209

〃

山野

高史

香川大学

大学院工学研究
科〃

Takashi Yamano

Kagawa University

210

〃

大西

吉行

香川大学

大学院工学研究科〃

Yoshiyuki Onishi

Kagawa University

211

Si 基板上における GaN/GaNAs 超格子の構造評
価

小柴

俊

香川大学

工学部

Shyun Koshiba

Kagawa University

212

〃

加太

俊

香川大学

大学院工学研究科

Shun Kabuto

Kagawa University

213 GaAs/GaAsN 超格子の電子構造に関する研究

矢口

裕之

埼玉大学

大学院理工学研
Electronic structure of GaAs/GaAsN superlattices
究科

Hiroyuki Yaguchi

Saitama University

214

〃

高宮

健吾

埼玉大学

大学院理工学研
究科〃

Kengo Takamiya

Saitama University

215

〃

山崎

泰由

埼玉大学

大学院理工学研
究科〃

Yasuyuki Yamazaki

Saitama University

216

Si 基板上における GaN/GaNAs 超格子の光学評
価

小柴

俊

香川大学

工学部

Shyun Koshiba

Kagawa University

217

〃

加太

俊

香川大学

大学院工学研究科

Shun Kabuto

Kagawa University

テラヘルツ分光装置を用いた酸化物磁性材料の
研究

大越

慎一

東京大学

大学院理学系研Study of magnetic oxide using terahertz spectroscopy
究科

Shinichi Ohkoshi

The University ofTokyo

担当所員：高橋

担当所員：秋山

ISSP Activity Report 2014

担当所員：末元

79

218

Title

敏男
Growth condition effect on interfaces and crystal structureof diluted magnetic semiconductor GaGdAs single layer and
GaGdAs/GaAs superlattices

Structural evaluation of GaN/GaAs superlattice on Si〃

英文

Optical assessment of structural evaluation of GaN/GaAs
superlattice on Si
〃

徹

80
ISSP Activity Report 2014

No．

課題名

氏名

所属

219

〃

生井

飛鳥

東京大学

220

〃

吉清

まりえ

221

(BEDT-TTF)(TCNQ) 結晶における可視 - 近赤外反射スペクトルの温度変化

三野

222

〃

貞本

Title

Name

Organization

大学院理学系研
究科〃

Asuka Namai

The University of
Tokyo

東京大学

大学院理学系研
究科〃

Marie Yoshikiyo

The University of
Tokyo

弘文

千葉大学

普遍教育センタ Temperature dependence of visible to near-infrared reflectance
Hirofumi Mino
spectra in (BEDT-TTF)(TCNQ) crystalsーChiba University

貢汰

千葉大学

大学院理学研究
科

Chiba University〃

Kota Sadamoto

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

課題名

氏名

所属

1

遷移金属酸窒化物、金属間化合物における構造
物性研究

山浦

淳一

東京工業大学

元素戦略研究セ Structural physics on the transition metal oxynitrides andintermetallic compounds
ンター

Junichi Yamaura

Tokyo Institute ofTechnology

2

低温脱硫処理で得られた不定比性硫化物の構造
と組成

陰山

洋

京都大学

大学院工学研究 Composition and structure of non-stoichiometric sulfides
obtained by low temperature desulfurization
科

Hiroshi Kageyama

Kyoto University

3

〃

小林

洋治

京都大学

大学院工学研究
科〃

Yoji Kobayashi

Kyoto University

4

〃

ギヨーム
イー

京都大学

大学院工学研究科〃

Guillaume Bouilly

Kyoto University

5

〃

増田

直也

京都大学

大学院工学研究
科〃

Naoya Masuda

Kyoto University6

超臨界流体を含む高密度溶媒中レーザーアブレーションプラズマの分光解析

シュタウス
スヴェン

東京大学

大学院新領域創 Spectroscopic investigation of laser ablation plasmas generated
Sven Staussin high-density fluids up to supercritical fluid state
成科学研究科The University of
Tokyo

7

〃

姫野

翔平

東京大学

大学院新領域創成科学研究科

Shohei Himeno

The University of
Tokyo

8

パイロクロア型希土類酸化物の単結晶育成と磁気フラストレーションの研究

松平和之

九州工業大学

大学院工学研究 Single crystal growth and study of frustrated magnetism inpyrochlore rare-earth oxides
院

Kazuyuki Matsuhira

Kyushu Institute ofTechnology

9軌道とスピンの自由度を有する遷移金属系物質の純良単結晶育成と物性評価

片山

尚幸

名古屋大学

大学院工学研究 Growth of single crystals of transition metal compounds withorbital and spin degrees of freedom科

Naoyuki Katayama

Nagoya University

10

〃

中埜

彰俊

名古屋大学

大学院工学研究科〃

Akitoshi Nakano

Nagoya University

11

〃

杉山

由季

名古屋大学

大学院工学研究科〃

Yuki Sugiyama

Nagoya University

ブ

Title

〃

Name

Organization

No．

課題名

氏名

所属

Title

Name

Organization

Title

Name

Organization

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

課題名

1

高温高圧水を用いた医療廃棄物の小型オンサイ
ト処理システムの開発

大友

順一郎

東京大学

大学院新領域創 Development of small size on-site disposal system in sub- andsupercritical water for medical waste
成科学研究科

Junichiro Otomo

The University of
Tokyo

2

〃

長澤

祐介

東京大学

大学院新領域創成科学研究科

Yusuke Nagasawa

The University of
Tokyo

3

ぺロブスカイト型酸化物を用いたケミカルルー
ピングシステムの開発

大友

順一郎

東京大学

大学院新領域創 The study of perovskite based oxygen carrier materials for
CLC/CLR applications
成科学研究科

Junichiro Otomo

The University of
Tokyo

4

〃

オーチェン
ジェームズ
オーチェン

東京大学

大学院新領域創成科学研究科

Ochieng James
Ochieng

The University of
Tokyo

5

金属酸化物の酸化還元反応における担体効果の
検討

大友

順一郎

東京大学

大学院新領域創
Effect of support materials on redox reaction of metal oxides
成科学研究科

Junichiro Otomo

The University of
Tokyo

6

〃

高坂

文彦

東京大学

大学院新領域創成科学研究科

Fumihiko Kosaka

The University of
Tokyo

7

高温高圧水中における固体酸・塩基触媒反応の速度論的解析

大友

順一郎

東京大学

大学院新領域創 Kinetic analysis of solid acid and base catalyzed reactions in
sub- and supercritical water
成科学研究科

Junichiro Otomo

The University of
Tokyo

8

〃

秋月

信

東京大学

大学院新領域創成科学研究科

Makoto Akizuki

The University of
Tokyo

東京大学

大学院新領域創 Characterization for metal nanoparticles dispersed on ceria,
mesoporous materials and graphene oxide
成科学研究科

Takehiko Sasaki

The University of
Tokyo

9

氏名

酸化セリウム・メソポーラスマテリアル・グラ
フェンオキサイド - 金属微粒子系のキャラクタリ 佐々木
ゼーション

岳彦

所属

〃

〃

〃

〃

ISSP Activity Report 2014

81

10

〃

原田

慧

東京大学

大学院新領域創成科学研究科〃Kei Harada

The University of
Tokyo

11

〃

Etty Nurlia
Kusumawati

東京大学

大学院理学系研
究科〃

Etty Nurlia
Kusumawati

The University of
Tokyo

12

フラストレート磁性とスピン軌道相互作用の協調・競合効果

有馬

孝尚

東京大学

大学院新領域創 Interplay between frustrated magnetism and spin-orbit
interaction
成科学研究科Takahisa Arima

The University of
Tokyo

13

〃

阿部

伸行

東京大学

大学院新領域創成科学研究科〃Nobuyuki Abe

The University of
Tokyo

14

〃

植松

大介

東京大学

大学院新領域創成科学研究科〃

Daisuke Uematsu

The University of
Tokyo

15

〃

塩澤

俊介

東京大学

大学院新領域創成科学研究科〃Shunnsuke Shiozawa

The University of
Tokyo

16

〃

松浦

慧介

東京大学

大学院新領域創成科学研究科〃

Keisuke Matsuura

The University of
Tokyo

82
ISSP Activity Report 2014

No．

課題名

17

パイロクロア格子またはカゴメ格子をもつ遷移金属フッ化物の物性評価

植田

浩明

京都大学

18

〃

小林

慎太郎

19

〃

田口

20

氏名

所属

Name

Organization

大学院理学研究 Characterization of transition metal fluorides with pyrochloreor kagome lattice科

Hiroaki Ueda

Kyoto University

京都大学

大学院理学研究
科〃

Shintaro Kobayashi

Kyoto University

篤史

京都大学

大学院理学研究科〃

Atsushi Taguchi

Kyoto University

順一郎

東京大学

大学院新領域創 The effects of minor components in LSCF cathode on oxygen
reduction reaction
成科学研究科

Junichiro Otomo

The University ofTokyo

Junya Oishi

The University ofTokyo

LSCF 空気極酸素還元反応に対する SOFC 製造工
大友程由来微量成分の影響評価

Title

21

〃

大石

淳矢

東京大学

大学院新領域創成科学研究科22

アンモニア分解及び合成反応における電気化学
特性と速度論解析

大友

順一郎

東京大学

大学院新領域創 Electrochemical reaction and its kinetic analysis in ammonia
decomposition and synthesis
成科学研究科

Junichiro Otomo

The University of
Tokyo

23

〃

野田

直人

東京大学

大学院新領域創成科学研究科

Naoto Noda

The University of
Tokyo

24

ケミカルループ法における酸化物イオン伝導体を用いた酸素キャリア材料の寿命評価

大友

順一郎

東京大学

大学院新領域創 Evaluation of life time of metal oxides supported by oxide ion
conductors in chemical looping combustion
成科学研究科

Junichiro Otomo

The University of
Tokyo

25

〃

菊池

典晃

東京大学

大学院新領域創成科学研究科

Noriaki Kikuchi

The University of
Tokyo

順一郎

東京大学

大学院新領域創 Evaluation of microstructure and proton conductivity inphosphate glass-ceramics thin films
成科学研究科

Junichiro Otomo

The University ofTokyo

Minoru Kadota

The University of
Tokyo

26

プロトン伝導性リン酸ガラス - セラミックス薄膜
大友の微構造観察とイオン伝導特性

〃

〃

〃

27

〃

門田

稔

東京大学

大学院新領域創成科学研究科28

結晶界面における無機複合型プロトン電解質の合成とイオン伝導度の評価

大友

順一郎

東京大学

大学院新領域創 Synthesis of proton conducting electrolyte and evaluation ofion conductivity of grain boundary
成科学研究科

Junichiro Otomo

The University of
Tokyo

29

〃

岩永

愛季

東京大学

大学院新領域創成科学研究科Aki Iwanaga

The University of
Tokyo

大友

順一郎

東京大学

大学院新領域創 Study of layered solid acid catalyzed reaction in sub- andsupercritical water
成科学研究科

Junichiro Otomo

The University ofTokyo

Shiori Nagoya

The University of
Tokyo

30

高温高圧水中における層状固体酸触媒反応

〃

〃

31

〃

名越

詩織

東京大学

大学院新領域創成科学研究科32

超臨界水熱合成による複合酸化物ナノ粒子の合成とその生成機構解明

大友

順一郎

東京大学

大学院新領域創 Elucidation of formation mechanism for mixed oxide
nanoparticles under supercritical hydrothermal synthesis
成科学研究科

Junichiro Otomo

The University of
Tokyo

33

〃

横

東京大学

大学院新領域創成科学研究科

Akira Yoko

The University of
Tokyo

哲

〃

〃

No．

課題名

34

有機ハイドライドの電極酸化還元反応における電極開発と速度論解析

大友

順一郎

東京大学

大学院新領域創 Development of electrode catalyst and kinetic analysis in
redox reactions of organic hydrides on electrode
成科学研究科

Junichiro Otomo

The University of
Tokyo

35

〃

酒井

良輔

東京大学

大学院新領域創成科学研究科Ryosuke Sakai

The University of
Tokyo

岳彦

東京大学

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

Takehiko Sasaki

The University ofTokyo

Kentaro Itako

The University of
Tokyo

36

触媒反応の in situ ラマン散乱測定

氏名

佐々木

所属

Title

〃

Name

Organization

ISSP Activity Report 2014

37

〃

板子

健太郎

東京大学

大学院新領域創成科学研究科38

超臨界二酸化炭素中パルスレーザーアブレーシ
ョンのイメージング分光

占部

継一郎

東京大学

大学院新領域創 Imaging spectroscopy for pulsed laser ablation plasma insupercritical carbon-dioxide
成科学研究科

Keiichiro Urabe

The University of
Tokyo

39

Si 基ナノ複合熱電材料の TEM による微細組織評
宮崎
価

吉宣

大阪大学

大学院工学研究 Microstructural analysis of Si-based nanocomposite
thermoelectric materials using TEM
科Yoshinobu Miyazaki

Osaka University

40

スピンクロスオーバー転移におけるドメイン成長の直接観測

糸井

充穂

日本大学

医学部

Miho Itoi

Nihon University

41

形態制御に基づく蓄電池材料開発

細野英司

産業技術総合研 エネルギー技術 Development of the battery materials based on the morphology
Eiji Hosono
control
究所
研究部門

42

新規磁石材料の微細構造解析

齋藤哲治

千葉工業大学

工学部

43

天然鉱物の微細組織と結晶性の実態

永嶌

真理子

山口大学

大学院理工学研 Evaluation of micro-texture and crystallinity of naturalminerals
究科

Mariko Nagashima

Yamaguchi University

44

溶融成長バルク超伝導体の磁性と構造組織に関
する研究

和泉

充

東京海洋大学

大学院海洋科学 Magnetic properties and microstructural organization of meltgrowth bulk superconductors
技術研究科

Mitsuru Izumi

Tokyo University ofMarine Science andTechnology

45

〃

周

迪帆

弓削商船高等専
門学校

Difan Zhou

Yuge National
College of Maritime
Technology

46

ハーフメタル型 Mn 基ホイスラー合金の磁性と輸送特性に関する研究

重田

出

鹿児島大学

大学院理工学研 Study on the magnetic and transport properties of half-metallic
Iduru Shigeta
Mn-based Heusler alloys
究科

Kagoshima University

47

〃

重松

理史

鹿児島大学

大学院理工学研
究科

Satoshi Shigematsu

Kagoshima University

廣井

政彦

鹿児島大学

大学院理工学研 Study on the magnetic and electrical properties of Heusler
compounds
究科

Masahiko Hiroi

Kagoshima University

Soura Nishiinoue

Kagoshima University

Masashi Hasegawa

Nagoya University

48
49

83

50

ホイスラー型化合物の磁性と伝導の研究〃
新規ぺロブスカイト系関連酸化物の磁気物性〃

Direct observation of domain growth upon thermal spincrossover phenomena

Microstructural studies of newly developed permanent magnet
Tetsuji Saito
materials

〃

〃

西井上

創羅

鹿児島大学

大学院理工学研
究科

長谷川

正

名古屋大学

大学院工学研究
Magnetism of novel perovskite-type oxides
科〃

National Institute ofAdvanced Industrial
Science and Technology

Chiba Institute ofTechnology

84

No．

課題名

51

〃

氏名

所属

Title

Name

Organization〃

Gen Shimura

Nagoya University

ISSP Activity Report 2014

志村

元

名古屋大学

大学院工学研究科廣戸孝信

東京理科大学

大学院基礎工学 Magnetic properties of icosahedral quasicrystals and its
approximants
研究科

Takanobu Hiroto

Tokyo University of
Science真帆人

横浜国立大学

大学院工学研究 Precipitation behavior and magnetic properties of finemagnetic particles in Cu ‐ Ni base alloys single crystal
院

Mahoto Takeda

Yokohama National
University

52

正 20 面体準結晶および近似結晶の磁性53

Cu − Ni − X（X=Co,Fe）系単結晶性合金中の磁竹田性微粒子析出過程と磁気特性の関係

54

〃

李

東海

横浜国立大学

大学院工学府〃Lee donghae

Yokohama National
University

55

〃

金

俊燮

横浜国立大学

大学院工学府〃Kim Junseop

Yokohama National
University

56

フラストレート磁性とスピン軌道相互作用の協調・競合効果

豊田

新悟

東京大学

大学院新領域創 Interplay between frustrated magnetism and spin-orbit
interaction
成科学研究科

Shingo Toyoda

The University of
Tokyo

57

〃

鷲見

浩樹

東京大学

大学院新領域創成科学研究科〃

Hiroki Sumi

The University of
Tokyo

58

〃

根津

正謙

東京大学

大学院新領域創成科学研究科〃

Naoaki Netsu

The University of
Tokyo

Title

Name

Organization

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

課題名

氏名

所属

1

マイクロミキサを用いた機能性酸化物ナノ粒子
の連続合成

陶

2

カーボンファイバーの高分解能透過電子顕微鏡
による微細構造解析

斎藤

幸恵

東京大学

3

Si 置換 Mn2GeO4 における新奇マルチフェロイ
ック特性の起源解明本田孝志

高エネルギー加 物質構造科学研 Study on the origin of unusual multiferroicity in Si-substituted
Mn2GeO4速器研究機構究所

産業技術総合研 ナノシステム研 Continuous synthesis of functional metal oxide nanoparticles
using a micromxer
究所
究部門

究

大学院農学生命 Structural analysis of carbon fibers using high resolution
transmission electron microscopy
科学研究科

Kiwamu Sue

National Institute ofAdvanced Industrial
Science and Technology

Yukie Saito

The University ofTokyo

Takashi Honda

KEK

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

課題名

氏名

所属

Title

Name

Organization1

超流動ヘリウム 3-A 相の半整数量子渦の研究木村豊

大阪市立大学

大学院理学研究
Study of the half quantized vortex in superfluid 3He-A phase
科

Yutaka Kimura

Osaka City University2

熱輸送測定を用いたスピン液体の研究

渡邊

大樹

京都大学

大学院理学研究
Study of spin liquids by thermal transport measurement
科

Daiki Watanabe

Kyoto University

No．

課題名

氏名

所属

3

高次高調波発生チャンバー及び多層膜鏡切り替えチャンバーの開発山本貴士

東京理科大学

大学院理学研究 Development of high harmonics generation and multi layer
mirror chamber
科

Takashi Yamanoto

Tokyo University of
Science4

窒素ドープ炭素材料の酸素還元反応メカニズム
の解明

木内

久雄

東京大学

大学院工学系研 Study on the oxygen reduction reaction of nitrogen-dopedcarbon material
究科

Hisao Kiuchi

The University of
Tokyo

Title

Name

Organization

ISSP Activity Report 2014

85

86

No．

課題名

氏名

所属

平成 26 年度

共同利用課題一覧（後期）/ Joint Research List (2014 Latter Term)

Title

Name

Organization

Name

Organization

Hiroshi Sawa

Nagoya University

Kazumasa Miyake

Toyota Physical andChemical ResearchInstituteKenta Kimura

Osaka University

Yoshitomo Karaki

University of the
Ryukyus

嘱託研究員 / Commission Researcher

ISSP Activity Report 2014

No．

課題名

担当所員：中辻

氏名

所属

Title

知

1

X 線回析実験による軌道状態の研究とその化学的澤
置換効果の解明2

価数異常を伴う量子臨界現象

三宅和正

豊田理化学研究
所

3

幾何学的フラストレート磁性体における量子物
性の研究

木村

健太

大阪大学

大学院基礎工学
Quantum state of matter in geometrically-frustrated magnets
研究科

4

超伝導と核強磁性の共存

柄木

良友

琉球大学

教育学部

5

価数揺動重い電子イッテルビウム化合物における価数クロスオーバーと量子臨界現象

久我

健太郎

大阪大学

大学院理学研究 Valence crossover and quantum critical phenomena in valence
Kentarou Kuga
fluctuating and heavy fermion Yb-based compound
科

Osaka University

担当所員：吉信博

名古屋大学

大学院工学研究 X-ray diffraction study of orbital state and its control bychemical substitution
科
Quantum criticality associated with valence instability

Interplay between superconductivity and nuclear
ferromagnetism淳

6

固体表面に吸着した有機分子の光学物性及び振
動状態評価

桑原

裕司

大阪大学

大学院工学研究 Investigation of optical and vibrational properties of organic
molecules on sold surfaces
科

Yuji Kuwahara

Osaka University

7

極低温非弾性トンネル分光と高分解能電子エネ
ルギー損失分光による吸着分子の素励起過程

米田

忠弘

東北大学

Elementary excitations of adsorbed molecules using low多元物質科学研
temperature scanning tunneling spectroscopy and high究所
resolution electron energy loss spectroscopy

Tadahiro Komeda

Tohoku University8

酸化物半導体光触媒における水分解反応の研究

松本

吉泰

京都大学

大学院理学研究 Study of water splitting reaction on oxide semiconductor
catalysts
科

Yoshiyasu
Matsumoto

Kyoto University

9

グラフェンの化学修飾とその評価

Md. Zakir
Hossain群馬大学

先端科学研究指導者育成ユニッ Chemical modification of graphene and its characterizationト

Md. Zakir Hossain

Gunma University

担当所員：上床美也

10

有機伝導体の圧力効果

村田惠三

大阪市立大学

大学院理学研究
Effect of pressure on the organic conductor
科

Keizo Murata

Osaka City University

11

多重極限関連圧力装置の調整

高橋

博樹

日本大学

文理学部

Hiroki Takahashi

Nihon University

12

希土類化合物の単結晶試料評価とその圧力効果

藤原

哲也

山口大学

大学院理工学研
Effect of pressure on the Ce compounds
究科

Tetsuya Fujiwara

Yamaguchi University

Adjustment of cubic anvil apparatus

No．

課題名

氏名

所属

Title

Name

Organization

Gendo Oomi

Kurume Institute ofTechnology

13磁性体の圧力効果

巨海

玄道

久留米工業大学

14

圧力下 NMR 測定法に関する開発

藤原

直樹

京都大学

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

Naoki Fujiwara

Kyoto University

15

低温用マルチアンビル装置の開発

辺土

正人

琉球大学

理学部

Masato Hedo

University of the
Ryukyus16

中性子回析に用いる圧力装置の開発

片野

進

埼玉大学

大学院理工学研
Developments of high pressure cell for neutron diffraction
究科

Susumu Katano

Saitama University

17

擬一次元有機物質の圧力下物性研究

糸井

充穂

日本大学

医学部

Study on pressure induced superconductivity of quasi organic
conductor

Miho Itoi

Nihon University18

高圧下の比熱測定装置の開発

梅原

出

横浜国立大学

工学部

Development of apparatus for specific heat measurements
under high pressure

Izuru Umehara

Yokohama National
University19

磁化測定装置の開発

名嘉節

物質・材料研究機構

Development of the magnetometer

Takashi Naka

National Institute forMaterials Science20重い電子系物質における圧力下電気抵抗測定

礒田

誠

香川大学

教育学部

21

圧力下における遷移金属化合物の量子物性研究

大串

研也

東北大学

大学院理学研究 Study of quantum phenomena under high-pressure intransition-metal compounds
科

Kenya Ohgushi

Tohoku University

山口明

兵庫県立大学

大学院物質理学 Study of strongly-correlated systems under ultra-low
temperatures and high fields environments
研究科

Akira Yamaguchi

The Univerisity ofHyogo

担当所員：山下

ISSP Activity Report 2014

22

Development of multi-anvil apparatus for low temperature

Effect of pressure on the electrical resistivity of heavy fermi on
Makoto Isoda
compounds

Kagawa University穣

超低温強磁場装置を用いた強相関電子系の研究担当所員：柴山

Effect of pressure on the magnetic materials

充弘

87

23

小型集束型小角散乱装置の高性能化及びそれによる応用研究

古坂

道弘

北海道大学

Development of a compact focusing small-angle neutron
大学院工学研究
scattering instrument and application research using the院
instrument

Michihiro Furusaka

Hokkaido University24

中性子散乱装置の共同利用・開発による強相関
電子系物質の構造物性の研究

岩佐

和晃

東北大学

大学院理学研究 Structural studies of strongly correlated electron systems byusage of neutron scattering and instrumental developments
科

Kazuaki Iwasa

Tohoku University25

中性子モノクロメータの改良と中性子４軸回折
計 FONDER の制御プログラムの改良

木村

宏之

東北大学

多元物質科学研 Improvement of neutron monochromator and control program
Hiroyuki Kimura
for four circle neutron diffractometer FONDER
究所

Tohoku University26

中性子散乱装置のアップグレードと共同利用研
究の推進

藤田

全基

東北大学

金属材料研究所

Upgrading of the neutron scattering device and promotion of
the research and public use

Masaki Fujita

Tohoku University27

中性子散乱装置のアップグレード後の研究計画の実施と共同利用の推進

大山

研司

東北大学

原子分子材料科
Propelling the inter university research cooperation
学高等研究機構

Keji Ohoyama

Tohoku University

88
ISSP Activity Report 2014

No．

課題名

28

中性子散乱装置のアップグレード後の研究計画の実施と共同利用の推進

田畑

吉計

京都大学

大学院工学研究 Progress of the joint research by using the neutron scattering
instruments
科

Yoshikazu Tabata

Kyoto University29

中性子散乱装置のアップグレード後の研究計画の実施と共同利用の推進

松村

武

広島大学

大学院先端物質 Promotion of joint research after the upgrade of neutron
scattering instruments
科学研究科

Takeshi Matsumura

Hiroshima University

30

J-PARC/MLF と JRR-3 共存時代に向けた３軸型
中性子散乱装置の高度化松浦直人

総合科学研究機
構

Masato Matsuura

CROSS

31

中性子分光器を用いた強相関電子系物質の微視
的研究

桑原

慶太郎

茨城大学

大学院理工学研 Neutron scattering study of strongly correlated electron
systems by using neutron spectrometers
究科

Keitaro Kuwahara

Ibaraki University

32

高度化した３軸分光器を用いた共同利用の推進と物質科学研究の実施

横山

淳

茨城大学

理学部

Executing user program and study of material science with the
Makoto Yokoyama
advanced triple-axis spectrometers

Ibaraki University

33

冷中性子スピン干渉計の応用と MINE ビームラ
インの整備

田崎

誠司

京都大学

大学院工学研究 Development of cold neutron spin interferometry andimprovements of MINE beam line科

Seiji Tasaki

Kyoto University

34

膜貫通ペプチドのフリップフロップ誘起能の評
価

中野

実

富山大学

大学院医学薬学 Induction of phospholipid Flip-Flop by transmembrane
研究部（薬学） peptides

Minoru Nakano

University of Toyama

35

C1-3

杉山

正明

京都大学

原子炉実験所

Development of micro-focusing small-angle neutron scattering
spectrometer

Masaaki Sugiyama

Kyoto University

36

集光テスト用小型 SANS の開発及び冷中性子反射率計 / 干渉計のアップグレード

日野

正裕

京都大学

原子炉実験所

Improvement of MIEZE spectrometer and cold neutronreflectometer and interferometer

Masahiro Hino

Kyoto University

37

集光テスト用小型 SANS の開発及び冷中性子反射率計・干渉計のアップグレード

北口

雅暁

名古屋大学

現象解析研究セ Development of compact SANS and improvement of cold
neutron reflectometer and interferometer
ンター

Masaaki Kitaguchi

Nagoya University38

中性子散乱用高圧セルの開発および高圧下における中性子散乱実験

藤原

哲也

山口大学

大学院理工学研 Neutron scattering experiments under high pressure anddevelopment of high pressure cell for neutron scattering
究科

Tetsuya Fujiwara

Yamaguchi University39

流動場でのソフトマターの構造変化に関する研
究

高橋

良彰

九州大学

先導物質化学研
Studies on structural change of soft matter under flow field究所

Yoshiaki Takahashi

Kyushu University40

三軸分光器を用いた極端条件下における物質科
学研究の実施

阿曽

尚文

琉球大学

理学部

Naofumi Aso

University of the
Ryukyus41

非イオン界面活性剤水溶液のクラフト転移に伴うベシクルの粒径に対するアルキル鎖長効果

川端

庸平

首都大学東京大学院理工学研 Effects of alkyl tail length on the vesicle size in a nonionicsurfactant aqueous solution below the Krafft temperature
究科

Youhei Kawabata

Tokyo Metropolitan
University42

中性子散乱研究計画の実施と共同利用の推進伊藤晋一

高エネルギー加 物質構造科学研
Propelling the inter university research cooperation
速器研究機構究所

Shinichi Itoh

KEK

43

冷中性子干渉イメージング装置開発研究大竹淑恵

理化学研究所

光量子工学研究 Research and development of interferometric imaging
instruments for cold neutron
領域

Yoshie Otake

RIKEN

44

高度化した三軸分光器を用いた強相関電子系物
質の研究

南部

雄亮

東北大学

多元物質科学研 Study of strongly correlated electron systems using advanced
triple-axis spectrometers
究所

Yusuke Nambu

Tohoku University

ULS 極小角散乱装置 IRT

氏名

所属

Title

Upgrade of 3-axis neutron spectrometer for the oncoming
coexistence of J-PARC/MLF and JRR-3

Material science studies under extreme conditions by using
triple-axis spectrometers

Name

Organization

No．

課題名

45

中性子散乱実験による高強度イオンゲルの精密
構造解析

担当所員：金道
46

所属

Title

藤井

健太

山口大学

大学院理工学研
Structural analysis of high toughness ion gels by SANS
究科

鳴海

康雄

東北大学

金属材料研究所

Name

Organization

Kenta Fujii

Yamaguchi University

Yasuo Narumi

Tohoku University

浩一

強磁場量子ビーム科学のためのパルスマグネッ
トの開発

担当所員：辛

氏名

Developments of pulse magnets for synchrotron and neutron
experiments in pulsed high magnetic fields

埴

ISSP Activity Report 20148947

高温超伝導体の高分解能光電子分光

藤森

淳

東京大学

大学院理学系研 Ultra-high resolution photoemission spectroscopy on high Tc
superconductor
究科

Atsushi Fujimori

The University of
Tokyo

48

60-eV レーザーを用いた時間分解光電子分光の
開発

石坂

香子

東京大学

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

Kyoko Ishizaka

The University of
Tokyo

49

鉄系超伝導体のレーザー光電子分光

下志万

東京大学

大学院工学系研
Laser-ARPES on Fe superconductor
究科

Takahiro Shimojima

The University of
Tokyo

50

Bi 系超伝導体の角度分解光電子分光竹内恒博

豊田工業大学

Tsunehiro Takeuchi

Toyota Technological
Institute51

高分解能光電子分光による強相関物質の研究

横谷

尚睦

岡山大学

大学院自然科学
Ultra-high resolution study on strongly correlated materials
研究科

Takayoshi Yokoya

Okayama University

52

酸化バナジウムの高分解能光電子分光

江口

律子

岡山大学

大学院自然科学
Photoemission study on vanadium oxides
研究科

Ritsuko Eguchi

Okayama University

53

有機化合物の光電子分光

金井要

東京理科大学

理工学部

Kaname Kanai

Tokyo University of
Science54重い電子系ウラン化合物の高分解能光電子分光

藤森伸一

日本原子力研究 量子ビーム応用 Ultra high resolution photoemission study on heavy fermion
Uranium compounds
開発機構
研究センター

Shinichi FujimoriJapan Atomic Energy
Agency55

レーザー光電子分光による酸化物薄膜の研究

津田俊輔

物質・材料研究機構

Shunsuke Tsuda

National Institute forMaterials Science56

４ｆ電子系物質の高分解能光電子分光

松波雅治

自然科学研究機
分子科学研究所 Photoemission study on 4f materials
構

Masaharu
Matsunami

National Institutes of
Natural Sciences57

超高空間分解能光電子顕微鏡による磁区構造観
察

中川

剛志

九州大学

大学院総合理工 Observation of magnetic domain structures by ultra-highresolution photoemission electron microscopy
学府

Takeshi Nakagawa

Kyushu University

58

Mn 化合物の時間分解光電子分光

大川

万里生

東京理科大学

理学部

Time resolved photoemission on Mn compounds

Mario Okawa

Tokyo University of
Science59

収差補正型光電子顕微鏡の建設と利用研究

小嗣

真人

高輝度光科学研究センター

Construction and utilization research of aberration correction
photoelectron emission microscopy

Masato Kotsugi

Japan Synchrotron
Radiation Institute

貴博

Angle-resolved photoemission study on high Tc cuprate

Photoemission study on organic compounds

Laser-photoemission study on oxide films

90
ISSP Activity Report 2014

No．

課題名

60

時間分解・マイクロビームラインの開発と研究室

61

光電子分光法を用いた各種分子性結晶の電子状態の研究及び装置の低温化

木須

孝幸

大阪大学

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

62

時間分解光電子分光を用いた VO2 の研究と装置
の高度化

吉田

力矢

北海道大学

電子科学研究所

担当所員：秋山氏名
隆桂之所属
高輝度光科学研
究センター

Title
Development of micr- and time-resolved beamline

Time-resolved photoemission study of VO2 and upgrade ofexperimental apparatus

Name

Organization

Takayuki Muro

Japan Synchrotron
Radiation InstituteTakayuki Kisu

Osaka University

Rikiya Yoshida

Hokkaido University

Hidekatsu Suzuura

Hokkaido University

英文63

半導体光デバイスにおける光学遷移強度の定量
評価と基礎理論

鈴浦

秀勝

北海道大学

大学院工学研究 Quantitative measurements and their basic theory of opticaltransition intensity in semiconductor optical devices
院

64

半導体光デバイスにおける光学遷移強度の定量評価とその応用

金光

義彦

京都大学

化学研究所

Quantitative measurements and their applications of opticaltransition intensity in semiconductor optical devices

Yoshihiko Kanemitsu Kyoto University

理工学部

Study of surface dynamics by time-resolved photoemission
spectroscopy with high-brilliant soft x-ray synchrotron
radiation

Hiroshi Kondoh

Keio University

Kenta Amemiya

KEK

Taichi Okuda

Hiroshima University

担当所員：松田巌

65

高輝度放射光軟 X 線を用いた時間分解光電子分
光による表面ダイナミクス研究近藤寛

慶應義塾大学66

軟 X 線アンジュレータビームラインの分光光学系の開発研究雨宮健太

高エネルギー加 物質構造科学研
Research and development of soft X-ray undulator beamline
速器研究機構究所

67

光電子スピン検出器の開発・研究

奥田

太一

広島大学

68

光電子顕微鏡による磁性ナノ構造物質の磁化過
程

木下

豊彦

高輝度光科学研究センター

69

高輝度軟 X 線を利用した強相関物質の電子状態
研究

組頭

広志

高エネルギー加 物質構造科学研 Study of electronic states in strongly correlated materials withhigh brilliant soft-Xray.
速器研究機構究所

70

時間分解光電子分光法による光触媒材料のキャ
リアダイナミクス研究小澤健一

東京工業大学

大学院理工学研 Study of carrier dynamics in photocatalysis materials by timeresolved photoemission spectroscopy
究科

Kenichi Ozawa

Tokyo Institute ofTechnology

71

軟 X 線時間分解分光実験による磁性研究

木村

昭夫

広島大学

大学院理学研究 Study of magnetic properties by time-resolved soft X-ray
spectroscopy
科

Akio Kimura

Hiroshima University

72

高輝度軟 X 線を利用する光電子顕微鏡装置の設
計・開発

坂本

一之

千葉大学

大学院融合科学 Research and designing of a PEEM spectrometer for highbrilliance soft X ray
研究科

Kazuyuki Sakamoto

Chiba University73

二次元表示型スピン分解光電子エネルギー分析
器の開発

大門

寛

奈良先端科学技 物質創成科学研 Development of 2D display type spin resolved photoelectronenergy analyzer
術大学院大学
究科

Hiroshi Daimon

Nara Instituteof Science andTechnology

74

時間分解光電子回析実験の要素技術開発

林

Koichi Hayashi

Tohoku University

好一

東北大学

放射光科学研究 Research and development of a new photoelectron spin
detector
センター

Magnetization in process of magnetic nano structure by PEEM Toyohiko Kinoshita

金属材料研究所

Technical development of time-resolved photoelectron
diffraction experimentJapan Synchrotron
Radiation Institute

Hiroshi Kumigashira KEK

No．

課題名

75

分子吸着系における時間分解光電子分光の研究

間瀬一彦

高エネルギー加 物質構造科学研 Study of time-resolved photoemission spectroscopy formolecular adsorption system
速器研究機構究所

Kazuhiko Mase

KEK

76

共鳴磁気光学カー効果の散乱理論研究田口宗孝

奈良先端科学技 物質創成科学研 Study of scattering theory for the resonant magneto-optical
Kerr effect術大学院大学
究科

Munetaka Taguchi

Nara Instituteof Science andTechnology

担当所員：原田

氏名

所属

Title

Name

Organization

慈久

ISSP Activity Report 201477

軟 X 線吸収／発光分光法によるリチウムイオン
電池電極材料の電子物性研究

細野英司

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

Eiji Hosono

National Institute ofAdvanced Industrial
Science and Technology

78

〃

朝倉

大輔

産業技術総合研 エネルギー技術
究所
研究部門

Daisuke Asakura

National Institute ofAdvanced Industrial
Science and Technology

79

超高分解能軟 X 線発光分光による水素吸蔵合金
中の水素の波動関数の局在性に関する研究

関場

大一郎

筑波大学

数理物質系

Study on the localization of wave functions of hydrogen atom
in hydrogen storage alloys using ultrahigh resolution soft X-ray Daiichiro Sekiba
emission spectroscopy

University of Tsukuba

80

時間分解光電子分光による重い電子系の研究

関山

明

大阪大学

大学院基礎工学 Study on heavy Fermion materials by time-resolved
Photoemission
研究科

Akira Sekiyama

Osaka University

81

高分解能光電子分光による酸化バナジウムの研
究

藤原

秀紀

大阪大学

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

Hidenori Fujiwara

Osaka University

82

軟 X 線発光・共鳴非弾性散乱分光の磁気円・線二色性測定システムの構築

菅

大阪大学

産業科学研究所

Shigemasa Suga

Osaka University

83

極小角Ｘ線散乱と軟Ｘ線吸収・発光分光によるソフトマテリアルの物性研究

雨宮

慶幸

東京大学

Study on the physical properties of soft materials by a
大学院新領域創
combination of ultra-small-angle X-ray scattering and soft
成科学研究科
X-ray absorption/emission spectroscopy

Yoshiyuki Amemiya

The University of
Tokyo

84

二次元原子薄膜トランジスタの電子状態のナノ
分析 (I)

吹留

博一

東北大学

電気通信研究所 Nanoscale analysis of electronic states of graphene device

Hirokazu Fukidome

Tohoku University

85

省エネ・創エネ・蓄電デバイスのオペランド分
光

尾嶋

正治

東京大学

放射光連携研究 Operando nano-spectroscopy for energy efficient, power
generation and energy storage devices機構

Masaharu Oshima

The University of
Tokyo

Youichi Murakami

KEK担当所員：和達滋正〃Construction of a noble system for circular and linear
dichroism in soft X-ray emission and RIXS spectroscopy

大樹

86

共鳴硬・軟 X 線散乱による構造物性と磁性研究村上洋一

高エネルギー加 物質構造科学研 Studying structures and magnetism of materials by resonant
hard and soft x-ray scattering
速器研究機構究所

87

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

東北大学

多元物質科学研 Operando analysis of the electronic structure of actual devices
Naoka Nagamura
by 3DnanoESCA
究所

Tohoku University

91

No．

課題名

92

氏名

所属

Title

Name

Organization

氏名

所属

Title

Name

Organization

一般研究員 / General Researcher
No．

課題名

ISSP Activity Report 2014

担当所員：榊原
1
2
3

俊郎
大原

繁男

名古屋工業大学

大学院工学研究 Magnetization and specific heat of PrZn11 in sub-Kelvintemperature region
科

Shigeo Ohara

Nagoya Institute ofTechnology

佐藤嵩晃

名古屋工業大学

大学院工学研究
科

Takaaki Sato

Nagoya Institute ofTechnology

Pr 内包カゴ状化合物 PrOs2Zn20 の極低温比熱測
鬼丸
定

孝博

広島大学

大学院先端物質
Specific heat measurements of a caged compound PrOs2Zn20
科学研究科

Takahiro Onimaru

Hiroshima University

PrZn11 の極低温磁気・比熱測定
〃

〃

4

〃

松本

圭介

広島大学

大学院先端物質科学研究科〃

Keisuke Matsumoto

Hiroshima University

5

〃

脇舎

和平

広島大学

大学院先端物質科学研究科〃

Kazuhei Wakiya

Hiroshima University

カゴ状構造を有する SmTr2Zn20 の極低温磁化測
加瀬
定

直樹

新潟大学

大学院自然科学 Low temperature magnetization measurements of the caged
compound SmTr2Zn20
研究科

Naoki Kase

Niigata University

Kinami Adachi

Niigata University

6
7

〃

安達

季並

新潟大学

大学院自然科学研究科

8

高圧合成法による新規パイロクロア型遷移金属
化合物の探索

有馬

孝尚

東京大学

大学院新領域創 Exploration of new transition metal compounds of pyrochlore
structure by means of high-pressure syntheses
成科学研究科Taka-hisa Arima

The University of
Tokyo

9

〃

鷲見

浩樹

東京大学

大学院新領域創成科学研究科

Hiroki Sumi

The University of
Tokyo

10

磁低温磁化測定による希土類アンチモン化合物の磁場誘起秩序

田山

孝

富山大学

大学院理工学研 Field-induced ordering of rare-earth monoantimonides studied
Takashi Tayama
by low-temperature magnetization
究部（理学）

11重い電子系アクチノイド化合物における極低温
電子比熱

芳賀

芳範

日本原子力研究 先端基礎研究セ Electronic specific heat of heavy fermion actinide compounds
at low temperatures
開発機構
ンター

12

〃

松本

裕司

名古屋工業大学

大学院工学研究科

13

重い電子系超伝導体の対関数の対称性決定理論

町田

一成

岡山大学

大学院自然科学 Theoretical studies of pair symmetry in heavy fermion
superconductors
研究科

14

正方晶 PrZn11 の極低温磁気・比熱測定

松本裕司

名古屋工業大学

大学院工学研究
Magnetic and specific heat measurements of tetragonal PrZn11 Yuji Matsumoto科

Nagoya Institute ofTechnology

15

層状ルテニウム酸化物 Sr2RuO4 における一軸性
圧力下比熱

矢口

宏

東京理科大学

理工学部

Specific heat of the layered ruthenate Sr2RuO4 under uniaxialpressure

Tokyo University of
Science〃〃〃

University of Toyama

Yoshinori Haga

Japan Atomic Energy
AgencyYuji Matsumoto

Nagoya Institute ofTechnology

Kazushige Machida

Okayama University

Hiroshi Yaguchi

No．

課題名

16

〃

山崎

照夫

東京理科大学理工学部

17

有機ラジカルを用いた新規磁性体の低温磁気測
定

山口

博則

大阪府立大学

18

〃

岩瀬

賢治

19

〃

菊地

20

Tb2Ti2O7 の純良単結晶を用いた低温磁化測定

所属

Organization

大学院理学系研 Low temperature magnetic properties of new organic radical
compounds
究科

Hironori Yamaguchi

Osaka Prefecture
University

大阪府立大学

大学院理学系研
究科〃

Kenji Iwase

Osaka Prefecture
University

健太郎

大阪府立大学

大学院理学系研
究科〃

Kentaro Kikuchi

Osaka Prefecture
University

高津浩

首都大学東京大学院理工学研
Magnetization measurements on the single crystal of Tb2Ti2O7 Hiroshi Takatsu
究科プロトン - 電子相関系分子性導体における重水素
西尾
効果

豊

東邦大学

理学部

翔太

東邦大学

大学院理学研究科

静岡大学〃

Tokyo Metropolitan
University

初果

ISSP Activity Report 2014

Toho University

Shota Yamada

Toho University

大学院理学研究 Low temperature physical properties at magnetic fields instrongly correlated electron system
科

Takao Ebihara

Shizuoka University

Masato Tsuchiya

Shizuoka University

Jun Akimitsu

Aoyama Gakuin
University

Yukimasa Azuma

Aoyama Gakuin
University

山田

23

Ce および Yb 系強相関化合物における磁場中ミ
リケルビン領域での物性測定

海老原

24

〃

土屋

政人

静岡大学

大学院理学研究科

25

電子ドープを施した Ag5-xSrxPb2O6 の低温超伝
導相の探索

秋光

純

青山学院大学

理工学部

26

〃

東

幸正

青山学院大学

大学院理工学研
究科担当所員：中辻

担当所員：常次

Deuteration effect of proton-electron correlated molecular
conductor

Yutaka Nishio

〃

〃

知
孝雄

〃
Investigation of superconducting phase in electron doped
Ag5-xSrxPb2O6〃

宏一

電子凝縮系における新奇現象

担当所員：リップマー

93

28

Name

Tokyo University of
Science

22

27

Title

Teruo Yamazaki

担当所員：森
21

氏名

御領

潤

弘前大学

大学院理工学研
Novel phenomena in electronic condensed matter systems
究科

Jun Goryo

Hirosaki University

伊高

健治

弘前大学

北日本新エネル Analysis of the by-product under the direct reduction process
for solar grade silicon
ギー研究所

Kenji Itaka

Hirosaki University

ミック

太陽電池用シリコン製造プロセスにおける副生
成物の評価

94

No．

課題名

29

新規ウルツァイト型四面体強誘電体材料の創成

ISSP Activity Report 2014

担当所員：家

氏名

所属

Title

Name

Organization

安井

伸太郎

東京工業大学

応用セラミック The creation of novel wurtzite-type tetrahedral ferroelectricmaterials
ス研究所

Shintaro Yasui

Tokyo Institute ofTechnology

泰弘

30

Pb 置換 Bi 系超伝導体のホール係数測定（２）

神戸

士郎

山形大学

大学院理工学研 Hall coefficient measurement of Pb-substituted Bi-based
superconductors (2)究科Shiro Kambe

Yamagata University

31

〃

鈴木

沙耶

山形大学

大学院理工学研
究科

Saya Suzuki

Yamagata University

32

HREELS によるグラファイトにおける電子格子
散乱の直接測定

田中

慎一郎

大阪大学

産業科学研究所

Shin-ichiro Tanaka

Osaka University33

Ag(111) 表面におけるシリセンの化学活性の研究 高木

紀明

東京大学

大学院新領域創Chemical reactivity of silicene grown on Ag(111)
成科学研究科

Noriaki Takagi

The University of
Tokyo

34

Si(001) 表面上の CO 吸着脱離過程の透過 FTIR
測定

大野

真也

横浜国立大学

大学院工学研究 FTIR measurements of CO adsorption and desorption
processes on Si(001)
院

Shinya Ohno

Yokohama National
University

35

〃

田中

一馬

横浜国立大学

大学院工学府〃

Kazuma Tanaka

Yokohama National
University

36

STM による Ag(110) 上の二次元 TiO2 単結晶の
構造解析

枝元

一之

立教大学

理学部

STM study on the structure of a two-dimensional TiO2 single
crystal on Ag(110)Kazuyuki Edamoto

Rikkyo University

37

金表面に吸着したドーパミン分子の高分解能振
動分光

米田

忠弘

東北大学

多元物質科学研 High resolution vibration spectroscopy of dopamine molecules
Tadahiro Komeda
adsorbed on Au(111)
究所

Tohoku University38

水の光分解触媒物質 BiVO4 及び La5Ti2CuS5O7の構造と物性の研究

山田

太郎

東京大学

Studies on the structure and physical properties of BiVO4
大学院工学系研and La5Ti2CuS5O7 ― photoactive materials for water splitting
究科
catalysis

Taro Yamada

The University of
Tokyo

39

二酸化炭素還元触媒反応に関する研究

森川

良忠

大阪大学

大学院工学研究
Study on catalytic reactions of reduction of CO2
科

Yoshitada Morikawa

Osaka University

東英

埼玉工業大学

先端科学研究所

Ju Dong-Ying

Saitama Institute ofTechnology

昊宇

埼玉工業大学

大学院工学研究
科

Yang Haoyu

Saitama Institute ofTechnology

東京学芸大学

教育学部

Masuaki Matsumoto

Tokyo Gakugei
University

担当所員：吉信

担当所員：小森
40
41
42

〃

淳
Direct measurement for the electron-phonon scattering ingraphite using HREELS

文夫

STM と XPS による Si(111)-7×7 表面上における巨
Fe クラスター構造の成長過程に関する研究〃楊TiO2(110) 表面における低速陽電子の対消滅と水松本
素効果の測定益明

Study on the growth process of Fe cluster structure in theSi(111)-7x7 surface by STM and XPS〃
Measurements of annihilation of positron and effect ofhydrogen on the TiO2(110) surface

No．

課題名

43

〃

氏名

所属

稲村

直晃

東京学芸大学

大学院教育学研
究科

Title
〃

44

グラフェンナノ構造の電子状態解析

田中

悟

九州大学

大学院工学研究
Electronic structure analysis of graphene nanostructures
院45

金属／半導体表面上ナノ構造の形成とその光学
応答の時間分解測定河村紀一

日本放送協会

放送技術研究所

46

半導体基板上に成長したシリセンの電子状態

中辻寛

東京工業大学

大学院総合理工 Electronic structure of silicene grown on semiconductor
substrates
学研究科

47

陽電子消滅法によるボロン正二十面体クラスタ
ー固体の金属結合−共有結合転換研究

金沢育三

東京学芸大学

教育学部

48

〃

今井

恵利華

東京学芸大学

大学院教育学研究科49

二ホウ化物薄膜上エピタキシャルシリセン及びゲルマニウム層の低温走査トンネル顕微鏡観察

高村

由起子

50

〃

51
52

Time resolved spectroscopy of optical responses from nanostructures on metal / semiconductor surfaces

Name

Organization

Naoaki Inamura

Tokyo Gakugei
University

Satoru Tanaka

Kyushu University

NHK Science &Norikazu Kawamura Technical ResearchLaboratories
Kan Nakatsuji

Tokyo Institute ofTechnology

Ikuzo Kanazawa

Tokyo Gakugei
University

Erika Imai

Tokyo Gakugei
University

北陸先端科学技 マテリアルサイ Low temp. STM investigation of epitaxial silicene andgermanium on diboride
術大学院大学
エンス研究科Yukiko Takamura

Japan Advanced
Institute of Scienceand Technology

アントワーヌフロランス

北陸先端科学技 マテリアルサイ術大学院大学
エンス研究科〃

Antoine Fleurence

Japan Advanced
Institute of Scienceand Technology〃

フローリアンジャンベー
ル

北陸先端科学技 マテリアルサイ術大学院大学
エンス研究科〃Florian Gimbert

Japan Advanced
Institute of Scienceand Technology〃

青柳

北陸先端科学技 マテリアルサイ術大学院大学
エンス研究科〃

Kohei Aoyagi

Japan Advanced
Institute of Scienceand Technology

53

準 2 次元有機超伝導体の渦糸格子状態におけるディラック型ランダウバンド構造の探索

佐々木Takahiko Sasaki

Tohoku University

54

〃

橋本

55

〃

佐々木

担当所員：長谷川

ISSP Activity Report 2014

担当所員：山下

担当所員：上床95

56

Metallic-covalent bonding conversion research in boron
icosahedral cluster solids using positron annihilation
〃

幸雄

航平

穣
孝彦

東北大学

金属材料研究所

Search for Dirac-shaped Landau band structure in the vortex
lattice state of quasi 2D organic superconductors

顕一郎

東北大学

金属材料研究所〃

Kenichiro Hashimoto Tohoku University

智

東北大学

大学院理学研究
科〃

Satoru Sasaki

Tohoku University

哲也

山口大学

大学院理工学研 Synthesis and single crystal growth of Ce-Zn-Ge novel ternaryintermetallics
究科

Tetsuya Fujiwara

Yamaguchi University

美也

Ce-Zn-Ge 三元系新規化合物の合成および単結晶
藤原
育成

96

No．

課題名

57

〃

ISSP Activity Report 2014

58

鹿児島大学

大学院理工学研 Study on pressure-induced martensitic phase transformation in
Iduru Shigeta
Co-based Heusler alloys
究科

Kagoshima University

藤本

祐太郎

鹿児島大学

大学院理工学研
究科

Yutaro Fujimoto

Kagoshima University

藤原

哲也

山口大学

大学院理工学研 Magnetization measurements under high pressures in EuFe2P2
Tetsuya Fujiwara
II
究科

Yamaguchi University

森田

哲広

山口大学

大学院理工学研
究科

Tetsuhiro Morita

Yamaguchi University

藤原

哲也

山口大学

大学院理工学研
Pressure effect on the transport property of EuRu2P2
究科

Tetsuya Fujiwara

Yamaguchi University

中田

琢也

山口大学

大学院理工学研
究科

Takuya Nakada

Yamaguchi University

小山

佳一

鹿児島大学

大学院理工学研 Pressure effect on first order phase transition of Mn based
ferromagnet
究科

Keiichi Koyama

Kagoshima University

大園

康介

鹿児島大学

大学院理工学研
究科

Kosuke Ozono

Kagoshima University

伊藤

昌和

鹿児島大学

大学院理工学研 Electric resistivity of Heusler compounds Ni2-xMnGa underhigh pressure
究科

Masakazu Ito

Kagoshima University

桑原

脩人

鹿児島大学

大学院理工学研
究科

Syuto Kuwahara

Kagoshima University

Ni-Mn-Ga 系強磁性形状記憶合金の磁化の圧力依
安達
存性

義也

山形大学

大学院理工学研 Pressure dependence of magnetization for the ferromagnetic
shape-memory alloys of Ni-Mn-Ga system
究科

Yoshiya Adachi

Yamagata University

大地

山形大学

大学院理工学研
究科

Daichi Ikeda

Yamagata University

横浜国立大学

大学院工学府Magnetic properties under high pressure of RTIn5

Guanghui Hu

Yokohama National
University

Fumitoshi Iga

Ibaraki University

Shinji Michimura

Saitama University

Naofumi Aso

University of the
Ryukyus〃EuFe2P2 の高圧力下磁化測定 (2)〃EuRu2P2 の輸送特性の圧力効果〃
Mn 基強磁性体の一次相転移の圧力効果〃
Ni2-xMnGa の高圧化電気抵抗測定

67
68

〃

69

〃

池田

〃

〃

〃

〃

〃

〃

RTIn5 の高圧物性測定

胡71

TmB4 の磁気準周期秩序相における圧力効果

伊賀

文俊

茨城大学

理学部

Pressure effect on the magnetic quasi-period ordered phase in
TmB4

道村

真司

埼玉大学

研究機構

〃

阿曽

尚文

琉球大学

理学部

73

〃
YbCo2Zn20 置換系物質の基本物性評価 II

光輝

〃

70

72

Organization

出中田

Co 基ホイスラー合金における圧力誘起マルテン
重田
サイト変態に関する研究

65
66

Name

大学院理工学研
究科

63
64

Title

山口大学

61
62

所属

琢也

59
60

氏名

Evaluation of fundamental physical properties in doped
YbCo2Zn20 II

Takuya Nakada

Yamaguchi University

No．

課題名

74

〃

75

氏名

所属

Title

Name

Organization〃

Yasuyuki Higa

University of the
Ryukyus

比嘉

泰之

琉球大学

大学院理工学研
究科

カゴ状構造を有する超伝導体 Y5Rh6Sn18 の高圧
加瀬
下電気抵抗測定直樹

新潟大学

大学院自然科学 Electrical resistivity measurements of Y5Rh6Sn18 with caged
compound under high pressure
研究科

Naoki Kase

Niigata University

Ryo Sato

Niigata University

Naofumi Aso

University of the
Ryukyus

76

〃

佐藤

凌

新潟大学

大学院自然科学研究科

77

セリウム系化合物における微小磁気モーメントの圧力下磁化測定 III

阿曽

尚文

琉球大学

理学部

78

〃

藤原

哲也

山口大学

大学院理工学研
究科〃

Tetsuya Fujiwara

Yamaguchi University

79

〃

比嘉

泰之

琉球大学

大学院理工学研
究科〃

Yasuyuki Higa

University of the
Ryukyus80

ペロブスカイト型ブロック層を有する鉄ニクタ
イド系超伝導関連物質の圧力効果

余Yu ShanNational Institute forMaterials Science81

圧力下における CeS の磁気相転移と近藤効果

松村

82
83

ISSP Activity Report 2014

84
85
86
87
88
89

97

90

〃
圧力下磁場中点接合分光実験の試み〃
圧力誘起価数転移の探索と高圧下輸送特性〃
価数揺動物質の圧力下電子状態研究〃
価数揺動物質の高圧力中輸送特性の研究〃

物質・材料研究機構

珊〃
Magnetization studies under pressure in Ce-based compoundswith small magnetic moments III

Pressure effects of iron pnictide compounds with perovskite
type block layers

広島大学

大学院先端物質
Magnetic order and Kondo effect in CeS under high pressure
科学研究科

Takeshi Matsumura

Hiroshima University

佑弥

広島大学

大学院先端物質科学研究科

Yuya Hayashi

Hiroshima University

林

武

〃

本山

岳

島根大学

大学院総合理工 Development of a new method of point-contact-spectroscopy
under pressure
学研究科

Gaku Motoyama

Shimane University

小川

翔平

島根大学

大学院総合理工学研究科

Shohei Ogawa

Shimane University

辺土

正人

琉球大学

理学部

垣花

将司

琉球大学

大学院理工学研
究科

井村

敬一郎

名古屋大学

齋藤

真衣

仲間
赤嶺

〃

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

University of the
Ryukyus

Masashi Kakihana

University of the
Ryukyus

大学院理学研究 Study of electronical state in valence-fluctuation materials
under high-pressure科

Keiichiro Imura

Nagoya University

名古屋大学

大学院理学研究科

Mai Saito

Nagoya University

隆男

琉球大学

理学部

Transport properties of valence fluctuating compounds underpressure

Takao Nakama

University of the
Ryukyus拡

琉球大学

大学院理工学研
究科〃

Hiromu Akamine

University of the
Ryukyus

〃

〃

98

No．
91

課題名
回転希釈冷凍機を用いた量子液体・固体研究

氏名

所属

白濱

圭也

慶應義塾大学

理工学部

Title

ISSP Activity Report 2014

Study of quantum fluids and solids using rotating dilution
refrigerator

Name

Organization

Keiya Shirahama

Keio University

92

〃

高橋

大輔

足利工業大学

共通課程〃

Daisuke Takahashi

Ashikaga Institute ofTechnology

93

〃

村川

智

慶應義塾大学

理工学部〃

Satoshi Murakawa

Keio University

94

〃

立木

智也

慶應義塾大学

大学院理工学研
究科〃

Tomoya Tsuiki

Keio University

中野

智仁

新潟大学

大学院自然科学 Single-crystal growth of the rare-earth compound and its
transport properties under pressure
研究科

Tomohito Nakano

Niigata University

寺島

宗一郎

新潟大学

大学院自然科学研究科

Soichiro Terashima

Niigata University

光田

暁弘

九州大学

大学院理学研究 Electrical resistivity of a ferromagnetic Eu compound underhigh pressure
院

Akihiro Mitsuda

Kyushu University

Takumi Fujimoto

Kyushu University

95
96
97

希土類化合物の単結晶育成と圧力下輸送特性〃
強磁性 Eu 化合物の圧力下電気抵抗測定

〃

98

〃

藤本

巧

九州大学

大学院理学府99

強相関型セリウム化合物および合金の量子相転
移と磁性

村山

茂幸

室蘭工業大学

大学院工学研究 Quantum phase transition and magnetism in the strongly
correlated Ce compounds and alloys
科

Shigeyuki Murayama

Muroran Institute ofTechnology

100

〃

雨海

有佑

室蘭工業大学

大学院工学研究科〃

Yusuke Amakai

Muroran Institute ofTechnology

101

〃

荒川

恵理

室蘭工業大学

大学院工学研究科〃

Eri Arakawa

Muroran Institute ofTechnology

中村修

岡山理科大学

学外連携推進室 Tranport properties of Yb4As3 under high pressure

Osamu Nakamura

Okayama University of
Science

102 高圧下での Yb4As3 の電気抵抗測定〃

103

磁性半導体 Yb5Ge4 における電気抵抗の圧力効
果

小坂

昌史

埼玉大学

大学院理工学研 Effect of pressure on the electrical resistivity of magnetic
semiconductor Yb5Ge4
究科

Masashi Kosaka

Saitama University

104

〃

道村

真司

埼玉大学

研究機構

〃

Shinji Michimura

Saitama University

105

〃

切金

大介

埼玉大学

大学院理工学研
究科〃

Tomoyuki Kirigane

Saitama University

106

重い電子系物質における 3He 温度領域での磁化
測定

佐藤

由昌

九州大学

大学院工学府Magnetization measurements in 3He temperature region forheavy fermion systems

Yoshiaki Sato

Kyushu University

三角格子磁性体
107 NaM(Acac)3benzen(M=Fe,Ni,Co,Mn) の低温磁 柄木
性

良友

琉球大学

教育学部

Low temperature magnetizm of triangular lattice
antiferromagnet NaM(acac)3benzen

Yoshitomo Karaki

University of the
Ryukyus

No．

課題名

氏名

所属

Title

Organization

Kenichi Takarabe

Okayama University of
ScienceNozomu Yasui

Okayama University of
Science

大学院理工学研 Magnetization measurement on the novel ternary compound
EuCuP2
究科

Tetsuya Fujiwara

Yamaguchi University

山口大学

大学院理工学研
究科

Tetsuhiro Morita

Yamaguchi University

健太郎

高知大学

教育研究部

Kentaro Kitagawa

Kochi University

岸本

恭来

高知大学

大学院総合人間自然科学研究科

Yasuki Kishimoto

Kochi University

114 正方晶の V2Ga5 と関連物質の圧力下の輸送特性 仲間

隆男

琉球大学

理学部

Takao Nakama

University of the
Ryukyus

115

〃

照屋

淳志

琉球大学

大学院理工学研
究科〃

Atsushi Teruya

University of the
Ryukyus

116

〃

上門

太郎

琉球大学

大学院理工学研
究科〃

Taro Uejyo

University of the
Ryukyus

繁岡

透

山口大学

大学院理工学研 Magnetic transition of polymorphic compound RIr2Si2 (R=rare
Toru Shigeoka
earth) 3
究科

Yamaguchi University

田端

克好

山口大学

大学院理工学研
究科

Katsuyoshi Tabata

Yamaguchi University

2 繁岡

透

山口大学

大学院理工学研 Magnetic property of polymorphic compound RIr2Si2 (R=rare
earth) 2
究科

Toru Shigeoka

Yamaguchi University

Yoh Fujii

Yamaguchi University

Development of new Seebeck coefficient measurement system
under multiple extreme conditions

Masato Hedo

University of the
Ryukyus〃

Keisuke Tomori

University of the
Ryukyus108 新規な窒化炭素の高圧高温合成とその評価

財部健一

岡山理科大学

理学部

109

安井

望

岡山理科大学

大学院理学研究科

110 新規三元化合物 EuCuP2 の磁化測定

藤原

哲也

山口大学

111

森田

哲広

112
113

〃

〃

新構造を持つ RCo2Ge4 重希土類化合物の物性評
北川
価〃

117 多形化合物 RIr2Si2(R= 希土類）の磁気転移

ISSP Activity Report 2014

118

3

〃

119 多形化合物 RIr2Si2（R= 希土類）の磁気特性

High-pressure high-temperature synthesis of carbon nitiride
and its characterization

Name

〃

〃
Investigation for physical properties in RCo2Ge4 heavy rareearth compounds with new structure〃
Transport properties of the single crystal V2Ga5 and related
compounds with tetragonal structure

〃

99

120

〃

藤井

洋

山口大学

大学院理工学研
究科

121

多重極限下のゼーベック係数測定システムの開
発

辺土

正人

琉球大学

理学部

122

〃

友利

圭佑

琉球大学

大学院理工学研
究科

123

超流動 He-3,A1 相中のスピン流れと電場の交差
相関の探索

山口

明

兵庫県立大学

大学院物質理学 Study of cross-correlation between spin flow and electric fieldin superfluid He-3 A1
研究科

Akira Yamaguchi

The University of
Hyogo

124

〃

白濱

圭也

慶應義塾大学

理工学部

Keiya Shirahama

Keio University

〃

〃

100
ISSP Activity Report 2014

No．

課題名

125

〃

村川

智

慶應義塾大学

理工学部〃

Satoshi Murakawa

Keio University

126

〃

巻内

崇彦

慶應義塾大学

大学院理工学研
究科〃

Takahiko Makiuchi

Keio University127

超流動ヘリウム 3 ー A 相での半整数量子渦の検
出

石川

修六

大阪市立大学

大学院理学研究 Investigation of the half quantized vortices in superfluid 3He-A
Osamu Ishikawa
phase科

Osaka City University

三浦康弘

桐蔭横浜大学

大学院工学研究 Studies on electrical properties of molecular thin films underhigh pressure
科

Yasuhiro Miura

Toin University of
Yokohama

128 分子薄膜の高圧下の電気的性質に関する研究

氏名

所属

Title

Name

Organization129

有機伝導体の温度圧力相図における圧力媒体の
効果

村田

惠三

大阪市立大学

大学院理学研究 Effect of the properties of high pressure medium on thetemperature-pressure phase diagram in organic conductors
科

Keizo Murata

Osaka City University

130

〃

平山

光

大阪市立大学

大学院理学研究
科

Hikaru Hirayama

Osaka City University

鳥塚

潔

法政大学

理工学部

Studies on high pressure properties of organic molecular
conductors

Kiyoshi Torizuka

Hosei University

Anisotropic magnetovolume effect of rare earth compounds

Masashi Ohashi

Kanazawa University

Shota Tateno

Kanazawa University

131 有機分子性導体の高圧物性の研究〃

132

立法晶の結晶構造を持つ希土類化合物の異方的磁気体積効果

大橋

政司

金沢大学

理工研究域

133

〃

立野

翔大

金沢大学

大学院自然科学研究科

134 量子臨界現象の探索と圧力下輸送測定

中野

智仁

新潟大学

大学院自然科学 Investigation of quantum critical phenomena and its transport
Tomohito Nakano
measurement under pressure
研究科

Niigata University

135

〃

山田

和弘

新潟大学

大学院自然科学研究科

Kazuhiro Yamada

Niigata University

136

固体ヘリウムの超流動に見られる様な「新規超流動現象の基礎研究」

久保田

芝浦工業大学

工学部

Minoru Kubota

Shibaura Institute ofTechnology

担当所員：川島実〃〃
Fundamental study of new types of superfluidity, as seen insolid 4He

直輝

137

テンソルネットワーク変分法の実装に関する研
究

原田

健自

京都大学

大学院情報学研
Implementation of tensor network variational methods
究科

Kenji Harada

Kyoto University

138

蜂の巣格子上反強磁性 Heisenberg-Kitaev 模型の磁気的性質鈴木隆史

兵庫県立大学

大学院工学研究 Magnetic properties of the antiferromagnetic HeisenbergKitaev model on a honeycomb lattice
科

Takafumi Suzuki

The University of
Hyogo

白子

雄一

名古屋大学

大学院工学研究
High-pressure synthesis of Zintl phase containing Al
科

Yuichi Shirako

Nagoya University

担当所員：廣井善二

139 Al を含む Zintl 相の超高圧合成

No．

課題名

140

〃

氏名

所属

齋藤

雄太

名古屋大学

大学院工学研究
科

Fe-MgSiO3-H2 系の高温高圧下におけるふるまい
八木
の解明

健彦

東京大学

飯塚

理子

143 Y 系充填スクッテルダイト超伝導体の高圧合成

関根

144

〃

145

核−マントル境界における金属鉄−ケイ酸塩メルト間の塩素分配に関する実験的研究

Title

Organization

Yuta Saito

Nagoya University

大学院理学系研 Behavior of Fe-MgSiO3-H2 system under high pressure andtemperature condition
究科

Takehiko Yagi

The University of
Tokyo

愛媛大学

地球深部ダイナ
ミクス研究センター

Riko Iizuka

Ehime University

ちひろ

室蘭工業大学

大学院工学研究 High-pressure synthesis Y-based filled-skutterudite
superconductors
科

Chihiro Sekine

Muroran Institute ofTechnology

三影勇人

室蘭工業大学

大学院工学研究
科

Hayato Mikage

Muroran Institute ofTechnology

桑原

秀治

東京大学

大学院新領域創 An experimental study on metal-silicate partitioning of chlorine
Hideharu Kuwahara
at core -mantle boundary conditions
成科学研究科The University of
Tokyo

146

下部マントル条件における MgO-SiO2-H2 系の相
篠崎
関係

彩子

東京大学

大学院理学系研 Phase relation of MgO-SiO2-H2 system under the lower mantle
Ayako Shinozaki
condition.
究科

The University of
Tokyo

147

高圧下におけるアミノ酸のラセミ化ならびにペ
プチド化

鍵

東京大学

大学院理学系研 Racemization and peptide formation of amino acids underhigh pressure
究科

Hiroyuki Kagi

The University of
Tokyo

148

〃

藤本

千賀子

東京大学

大学院理学系研
究科

Chikako Fujimoto

The University of
Tokyo

149

高圧下におけるガス物質充填型スクッテルダイ
ト型リン化物の探査

丹羽

健

名古屋大学

大学院工学研究 Exploration for gas-filled skutterudite compounds under highpressure科

Ken Niwa

Nagoya University

150 室温高圧下における環状炭化水素の重合反応

篠崎

彩子

東京大学

大学院理学系研
Pressure induced polymerization of cyclic organic compounds Ayako Shinozaki
究科

The University ofTokyo

151 新規イオン伝導性化合物の超高圧合成

長谷川

正

名古屋大学

大学院工学研究High pressure syntheses of novel ion conductors
科

Masashi Hasegawa

Nagoya University

152

廣瀬

瑛一

名古屋大学

大学院工学研究科

Eiichi Hirose

Nagoya University

志村

元

名古屋大学

大学院工学研究 High pressure and temperature synthesis of novel perovskite
oxide
科

Gen Shimura

Nagoya University

新規超伝導体 BaTi2(As1-xSbx)2O における圧力誘
陰山
起相転移

洋

京都大学

大学院工学研究
Pressure indured transition in BaTi2(As1-xSbx)2O科

Hiroshi Kageyama

Kyoto University
Kyoto University

141
142

〃

ISSP Activity Report 2014〃153 新規ペロブスカイト型複酸化物の高圧高温合成
154

裕之

〃

Name

〃

〃

〃

〃

101

155

〃

小林

洋治

京都大学

大学院工学研究
科〃

Yoji Kobayashi

156

〃

山本

隆文

京都大学

大学院工学研究
科〃

Takafumi Yamamoto Kyoto University

102
ISSP Activity Report 2014

No．

課題名

157

〃

158

氏名

所属

Title

Name

Organization〃

Cedric Tassel

Kyoto University

セドリック
タッセル

京都大学

白眉センター

超高圧プレスを用いた新規プロトニクス酸化物のソフト化学的合成法の検討

山口

周

東京大学

大学院工学系研 Oxide-protonics materials synthesis by combined use of soft
chemical method and high pressure
究科

Shu Yamaguchi

The University of
Tokyo

159

〃

三好

正悟

東京大学

大学院工学系研
究科〃

Shogo Miyoshi

The University of
Tokyo

160

〃

田中

和彦

東京大学

大学院工学系研
究科〃

Kazuhiko Tanaka

The University ofTokyo

161 直接窒化による 3d 遷移金属多窒化物の高圧合成 丹羽

健

名古屋大学

大学院工学研究 High pressure synthesis of 3d transition metal pernitride via
direct nitriding method科

Ken Niwa

Nagoya University

162

寺部

俊紀

名古屋大学

大学院工学研究科

Toshiki Terabe

Nagoya University

163 溶融亜鉛メッキ合金相の応力誘起変態

山口

周

東京大学

大学院工学系研 Stress-induced phase transformation of Fe-Zn alloy formed in
hot-dip process
究科

Shu Yamaguchi

The University of
Tokyo

164

〃

三好

正悟

東京大学

大学院工学系研
究科〃

Shogo Miyoshi

The University of
Tokyo

165

〃

田中

和彦

東京大学

大学院工学系研
究科〃

Kazuhiko Tanaka

The University of
Tokyo

166

〃

上田

涼平

東京大学

大学院工学系研
究科〃

Ryohei Ueda

The University of
Tokyo

167

ポリオキシエチレン系非イオン性界面活性剤のレオロジーに関する研究吉村倫一

奈良女子大学

研究院自然科学 Study on rheology of polyoxyethylene-type nonionicsurfactants
系

Tomokazu
Yoshimura

Nara Women’ s
University

168

〃

矢田

詩歩

奈良女子大学

大学院人間文化研究科

Shiho Yada

Nara Women’ s
University

169 3 本鎖量子磁性体 Cu3(OD)3SO4 の磁気構造解析 萩原

雅人

東京理科大学

理工学部

170

マルチフェロイック物質 Cu3Mo2O9 単結晶の方
位の確認

長谷

正司

物質・材料研究機構

171

一次元フラストレート鎖 AM(VO4)(OH) (A = Ca,
萩原
Sr;M = Cu, Ni, Co) の磁性

雅人

東京理科大学〃担当所員：柴山

担当所員：益田

〃

充弘

〃

隆嗣

理工学部

Magnetic structure study of three-legged ribbons Cu3(OD)4SO4 Masato Hagihala

Tokyo University of
Science

Confirmation of axis-directions of multiferroic substance
Cu3Mo2O9 single crystals

Masashi Hase

National Institute forMaterials Science

Magnetic property of frustrated spin chain system AM(VO4)(OH)

Masato Hagihara

Tokyo University of
Science

No．

課題名

氏名

所属

Title

Name

Organization

172 希土類化合物単結晶の物質評価

繁岡

透

山口大学

大学院理工学研
Characterization of rare earth single crystal compounds
究科

Toru Shigeoka

Yamaguchi University

173

中田

琢也

山口大学

大学院理工学研
究科

Takuya Nakada

Yamaguchi University

古川

はづき

お茶の水女子大 大学院人間文化 Evaluation of single crystal quality of non-centrosymmetric学
創成科学研究科 superconductors

Hazuki Furukawa

Ochanomizu
University

Yusuke Kousaka

Aoyama Gakuin
University

Hirotaka Manaka

Kagoshima University〃

174 空間反転対称性の破れた超伝導体の結晶性評価〃

ISSP Activity Report 2014175

高エネルギー X 線回折による CsCuCl3 の単一結
高阪
晶カイラリティ結晶の試料内部評価

勇輔

青山学院大学

理工学部

176

非磁性不純物による三角スピンチューブのスピ
ンダイナミクスの変化

真中

浩貴

鹿児島大学

大学院理工学研 Non-magnetic impurity effect on spin dynamics of triangularspin tubes
究科

177

高エネルギー X 線ラウエ法を用いたヘリカル磁性合金 Gd-RE (RE=Y,La) の単結晶試料の評価

山崎照夫

東京理科大学

理工学部

178

〃

栗原

舞

東京理科大学

大学院理工学研
究科

179

スピネル型バナジウム酸化物における磁気励起
の観測

阿部

伸行

東京大学

180

〃

松浦

慧介

181

〃

塩澤

182 (Ho,Y)Rh2Si2 単結晶の磁気特性 2
183Single crystalline CsCuCl3 with homo-crystalline chiraldomain, probed by high energy X-ray diffraction

Evaluation of the single crystalline samples of helical magnetic
Teruo Yamazaki
alloys Gd-RE (RE=Y,La) by high-energy X-ray Laue method.

Tokyo University of
Science103

Mai Kurihara

Tokyo University of
Science

大学院新領域創Measurement of magnetic excitation in spinel type vanadate
成科学研究科Nobuyuki Abe

The University of
Tokyo

東京大学

大学院新領域創成科学研究科〃

Keisuke Matsuura

The University of
Tokyo

俊介

東京大学

大学院新領域創成科学研究科〃Shunnsuke Shiozawa

The University of
Tokyo

繁岡

透

山口大学

大学院理工学研
Magnetic characteristics of (Ho,Y)Rh2Si2 single crystal 2
究科Toru Shigeoka

Yamaguchi University

田端

克好

山口大学

大学院理工学研
究科

Katsuyoshi Tabata

Yamaguchi University

はづき

お茶の水女子大 大学院人間文化 Spontaneous vortex lattice in ErNi2B2C and its related
学
創成科学研究科 compounds

Hazuki Furukawa

Ochanomizu
University

185 逐次相転移を示す磁性合金 Gd1-xLax の比熱測定 矢口宏

東京理科大学

理工学部

Hiroshi Yaguchi

Tokyo University of
Science

186

〃

山崎

照夫

東京理科大学

理工学部〃

Teruo Yamazaki

Tokyo University of
Science

187

〃

栗原

舞

東京理科大学

大学院理工学研
究科〃

Mai Kurihara

Tokyo University of
Science

担当所員：吉澤

184

〃

英樹

〃

ErNi2B2C とその関連物質における自発的磁束格
古川
子の観測

〃

Specific heat measurements for the magnetic alloy Gd1-xLax
showing successive phase transition

104
ISSP Activity Report 2014

No．

課題名

188

鉄系超伝導体 FeTe1-xSx の Te 雰囲気中アニール
効果

矢口

宏

東京理科大学

理工学部

189

〃

山崎

照夫

東京理科大学

理工学部

190

〃

久保田

聡

東京理科大学

大学院理工学研
究科

佐藤

博彦

中央大学

理工学部

担当所員：嶽山
191

氏名

所属

Title
Effect of Te-annealing in the Fe-based superconductor
FeTe1-xSx

Name

Organization

Hiroshi Yaguchi

Tokyo University of
Science〃

Teruo Yamazaki

Tokyo University of
Science〃

Satoshi Kubota

Tokyo University of
Science

Hirohiko Sato

Chuo University

正二郎

強磁場におけるフラストレート磁性体
K2Mn3(OH)2(VO4)2 の磁気光学特性

Magneto-optical properties of frustrated magnet
K2Mn3(OH)2(VO4)2 in high magnetic field

192

〃

大塚

大祐

中央大学

大学院理工学研
究科〃

Daisuke Otsuka

Chuo University

193

〃

長尾

有紀

中央大学

大学院理工学研
究科〃

Yuki Nagao

Chuo University

194

〃

池戸

優太

中央大学

大学院理工学研
究科〃

Yuta Ikedo

Chuo University

195

〃

原田

景

中央大学

大学院理工学研
究科〃

Kei Harada

Chuo University

196 (Ho,Gd)Rh2Si2 単結晶の高磁場磁化

繁岡

透

山口大学

大学院理工学研High field magnetization of (Ho,Gd)Rh2Si2 single crystal
究科

Toru Shigeoka

Yamaguchi University

197

藤井

洋

山口大学

大学院理工学研
究科

Yoh Fujii

Yamaguchi University

政幸

大阪大学

大学院理学研究 Development of a large wide-bore pulse magnet for a 10 MJ
capacitor bank科

Masayuki Hagiwara

Osaka University

谷口

一也

大阪大学

大学院理学研究科

Kazuya Taniguchi

Osaka University

200 Ni2-xMnGa の強磁場磁化測定

伊藤

昌和

鹿児島大学

大学院理工学研 Magnetization of Heusler compounds Ni2-xMnGa in highmagnetic field
究科

Masakazu Ito

Kagoshima University

201

桑原

脩人

鹿児島大学

大学院理工学研
究科

Syuto Kuwahara

Kagoshima University

道岡

千城

京都大学

大学院理学研究
High-field magnetization measurements in Yb1+xIn1-xCu4
科

Chishiro Michioka

Kyoto University

担当所員：金道

198
199

浩一

〃

10MJ コンデンサーバンク用大型ワイドボアパル
萩原
スマグネットの開発〃〃

202 Yb1+xIn1-xCu4 における強磁場磁化過程

〃

〃

〃

No．

課題名

氏名

所属

203

〃

今井

正樹

京都大学

204

〃

原口

祐哉

205

〃

中東

206

カゴメ格子をもつ遷移金属フッ化物単結晶の磁
性

207

Title

Name

Organization

大学院理学研究科〃

Masaki Imai

Kyoto University

京都大学

大学院理学研究
科〃

Yuya Haraguchi

Kyoto University

太一

京都大学

大学院理学研究科〃

Taichi Nakahigashi

Kyoto University

植田

浩明

京都大学

大学院理学研究 Magnetic studies of single crystals of transition metal fluorides
Hiroaki Ueda
with a kagome lattice
科

Kyoto University

〃

後藤

真人

京都大学

大学院理学研究科〃

Masato Goto

Kyoto University

208

〃

山川

智大

京都大学

大学院理学研究
科〃

Tomohiro Yamakawa Kyoto University

209

スピン 3/2 反強磁性交替鎖物質 RCrGeO5 (R =Tb, Ho, Er, Dy or Gd) の強磁場磁化測定

長谷正司

物質・材料研究機構

High-field magnetization measurements of spin-3/2
antiferromagnetic alternating chain substances RCrGeO5 (R =Tb, Ho, Er, Dy or Gd)

Masashi Hase

National Institute forMaterials Science

ISSP Activity Report 2014

105

静岡大学

大学院理学研究 Physical phenomena at high magnetic fields in rare earth
intermetallic compounds
科

Takao Ebihara

Shizuoka University

政人

静岡大学

大学院理学研究科

Masato Tsuchiya

Shizuoka University

菊池

彦光

福井大学

大学院工学研究
Magnetization studies of the frustrated magnets
科

Hikomitsu Kikuchi

University of Fukui

〃

国枝

賢治

福井大学

大学院工学研究科

Kenji Kunieda

University of Fukui

214

強磁場を用いたトポロジカル絶縁体の輸送特性に関する研究

鈴木

悠介

筑波大学

大学院数理物質 Study of the transport properties of topological insulator under
Yusuke Suzuki
high magnetic fields
科学研究科

215

強相関電子系化合物の秩序相に対する結晶対称性および軌道縮退の効果

横山

淳

茨城大学

理学部

216

〃

藤村

健司

茨城大学

大学院理工学研究科

217

近藤半導体 (Yb, R)B12 (R=Zr, Sc, Y) の 80T 級
磁場下での強磁場物性

伊賀

文俊

茨城大学

理学部

218

〃

石井

克弥

茨城大学

大学院理工学研
究科

伊賀

文俊

茨城大学

理学部

210 希土類金属間化合物の強磁場物性研究

海老原

211

〃

土屋

212

幾何学的フラストレート磁性体の強磁場磁化測定213

高圧合成希土類 12 ホウ化物及び valence
219 skipping 超伝導参照物質 (Ca,Sr)FeO3 の磁化特
性と比熱

孝雄

〃

〃

Effects of crystal symmetry and orbital degeneracy in orderedstates of strongly correlated electron systems

University of Tsukuba

Makoto Yokoyama

Ibaraki University

Kenji Fujimura

Ibaraki University

Fumitoshi Iga

Ibaraki University〃

Katsuya Ishii

Ibaraki University

Magnetic and thermal properties of rare earth dodeca-borides
produced by high pressure synthesis and valence-skipping
superconductor reference (Ca,Sr)FeO3

Fumitoshi Iga

Ibaraki University〃
High field physical property of Kondo insulator (Yb, R)B12(R=Zr, Sc, Y) up to 80T class by using the pulse magnet

106

No．

課題名

220

〃

氏名

所属
大学院理工学研
究科

ISSP Activity Report 2014

Title

Name

Organization〃

Eiji Kawawa

Ibaraki University

Masaya Fujioka

National Institute forMaterials Science

川和

英司

茨城大学

221

高磁場下における高フッ素濃度 SmFeAs(O,F) 単
藤岡
結晶の超伝導特性

正弥

物質・材料研究機構

222

新規積層三角格子反強磁性体の強磁場磁化過程
と磁気相図

浅野

貴行

福井大学

大学院工学研究 Magnetization process and magnetic phase diagram of novel
stacked triangular lattice antiferromagnets
科

Takayuki Asano

University of Fukui

223

〃

川見

洋一郎

九州大学

大学院理学府Yoichiro Kawami

Kyushu University

Keisuke Sato

Ibaraki National
College of Technology

Superconductivity for SmFeAs(O,F) with high fluorine
concentration under high magnetic field〃

224

単結晶 LaCo1-xRhxO3 の強磁場磁化の結晶方位依
佐藤
存

桂輔

茨城工業高等専
門学校

Crystal orientation dependence of high field magnetization in
LaCo1-xRhxO3

225

低次元新規量子スピン系の強磁場中における量子相転移現象小野俊雄

大阪府立大学

大学院理学系研 Quantum phase transition phenomena on the low dimensional
Toshio Ono
quantum spin systems in high magnetic field
究科

Osaka Prefecture
University

226

〃

井川

直哉

大阪府立大学

大学院理学系研
究科〃

Naoya Ikawa

Osaka Prefecture
University

227

〃

笠谷

和宏

大阪府立大学

大学院理学系研
究科〃

Kazuhiro Kasatani

Osaka Prefecture
University

228

フラストレート磁性体 K2Mn3(OH)2(VO4)2 の強
磁場磁化

佐藤

博彦

中央大学

理工学部

Hirohiko Sato

Chuo University

229

〃

大塚

大祐

中央大学

大学院理工学研
究科〃

Daisuke Otsuka

Chuo University

230

〃

長尾

有紀

中央大学

大学院理工学研
究科〃

Yuki Nagao

Chuo University

231

〃

池戸

優太

中央大学

大学院理工学研
究科〃

Yuta Ikedo

Chuo University

232

〃

原田

景

中央大学

大学院理工学研
究科〃

Kei Harada

Chuo University

気谷

卓

東京工業大学

応用セラミック
Thermodynamic study of spin liquid Tb2Ti2O7
ス研究所

Suguru Kitani

Tokyo Institute ofTechnology

満田節生

東京理科大学

理学部

Setsuo Mitsuda

Tokyo University of
Science

有馬

孝尚

東京大学

大学院新領域創 Nonreciprocal directional dichroism in magnetic ferroelectrics
Taka-hisa Arimain a high magnetic field
成科学研究科233 スピン液体物質 Tb2Ti2O7 の熱力学的研究
234

ダイヤモンド型量子スピン鎖新モデル物質のパ
ルス強磁場中磁化測定

担当所員：松田
235

High field magnetization of frustrated magnet
K2Mn3(OH)2(VO4)2

Magnetization study on new model compound of S =1/2
diamond chain system in pulsed high magnetic fields

康弘

メタホウ酸銅における強磁場下の非相反方向二色性

The University of
Tokyo

No．

課題名

236

〃

阿部

伸行

東京大学

237

〃

豊田

新悟

238

〃

根津

近藤半導体 (Yb,R)B12 および価数揺動物質
239 (Y,Tm)B6 のワンターンコイル 120T パルス磁場下での強磁場磁化過程

伊賀

240

〃

林

241

BiS2 系新層状超伝導体の超伝導機構解明に向けた強磁場下物性評価

水口242

Pr1-x(Sr1-yCay)xMnO3 の反強磁性と熱電特性に
関する研究

中津川

243

カゴ状物質 SmT2Al20 における磁場に鈍感な強相
東中
関電子物性の起源探索

担当所員：徳永

244

氏名

所属

Title

Name

Organization

大学院新領域創成科学研究科〃Nobuyuki Abe

The University of
Tokyo

東京大学

大学院新領域創成科学研究科〃

Shingo Toyoda

The University of
Tokyo

正謙

東京大学

大学院新領域創成科学研究科〃

Naoaki Netsu

The University of
Tokyo

文俊

茨城大学

理学部

High field magnetization of Kondo insulator (Yb,R)B12 andvalence fluctuation material (Y,Tm)B6 by using one-turn coil in Fumitoshi Iga
a 120 T pulse magnet

Ibaraki University

茨城大学

大学院理工学研究科

首都大学東京Tokyo Metropolitan
大学院理工学研 Elucidation of mechanisms of superconductivity in novel BiS2Yoshikazu Mizuguchi
based layered superconductors using high-field measurements
University
究科

博

横浜国立大学

理工学部隆二

首都大学東京瑛健人〃

Kento Hayashi

Ibaraki University

将史

〃

山田

佳一

ISSP Activity Report 2014

超強磁場を利用した CoCr 基合金におけるリエン
245 トラント挙動を示すマルテンサイト変態の観察 キョキョウ
および起源解明

Antiferromagnetism and thermoelectric properties inPr1-x(Sr1-yCay)xMnO3

Hiroshi Nakatsugawa

Yokohama National
University

大学院理工学研 Investigation of field-insensitive nature of heavy-fermion
compounds SmT2Al20
究科

Ryuji Higashinaka

Tokyo Metropolitan
University

首都大学東京大学院理工学研
究科

Akira Yamada

Tokyo Metropolitan
University

東北大学

Observation and clarification of the origin of re-entrant
大学院工学研究
martensitic transformation using strong magnetic field in CoCr Xiao XU
科
based alloys

Tohoku University

〃

107

246

導電性パイロクロア型酸化物の強磁場下の物性
研究

松平

和之

九州工業大学

大学院工学研究 Transport and magnetic properties of conductive pyrochlore
oxides under high field magnetic field院

Kazuyuki Matsuhira

Kyushu Institute ofTechnology

247

〃

前田

賢

九州工業大学

大学院工学府

Satoru Maeda

Kyushu Institute ofTechnology

248

二次元ディラック系層状物質における磁気トル
ク測定による量子振動の観測

酒井

英明

東京大学

大学院工学系研 Observation of dHvA oscillation for a layered Dirac metal bymeasuring magnetic torque究科

Hideaki Sakai

The University of
Tokyo

249

非破壊パルス強磁場を用いたグラファイトの磁
場誘起密度波相における輸送現象の研究

矢口宏

東京理科大学

理工学部

250

強磁場磁化測定によるピーナツ型カゴ状化合物
R6T4Al43 系における低温秩序相の解明青木勇二

首都大学東京大学院理工学研 High-field magnetization measurements on the low-temperature
Yuji Aoki
ordered phases of peanut-shaped cage material R6T4Al43
究科

Tokyo Metropolitan
University

251

〃

伏屋

健吾

首都大学東京大学院理工学研
究科

Tokyo Metropolitan
University〃

Study of the transport properties of the magnetic-field-induced
Hiroshi Yaguchi
density-wave state in graphite〃

Kengo Fushiya

Tokyo University of
Science

108

No．
252

課題名
強磁場磁化測定による量子磁性体 SmPt2Si2 の低松田
温秩序相の解明

ISSP Activity Report 2014253〃

担当所員：秋山
254

氏名

所属

Title

Name

Organization

達磨

首都大学東京大学院理工学研 High-field magnetization measurements on the low-temperature
Tatsuma Matsuda
ordered phases of quantum magnet SmPt2Si2
究科

Tokyo Metropolitan
University

伏屋

健吾

首都大学東京大学院理工学研
究科

Kengo Fushiya

Tokyo Metropolitan
University

矢口

裕之

埼玉大学

大学院理工学研 Photoluminescence excitation spectroscopy study on theelectronic structure of GaAs/GaAsN superlattices
究科

Hiroyuki Yaguchi

Saitama University〃

英文フォトルミネッセンス励起分光による GaAs/
GaAsN 超格子の電子構造解析

255

〃

高宮

健吾

埼玉大学

研究機構

〃

Kengo Takamiya

Saitama University

256

〃

須藤

真樹

埼玉大学

大学院理工学研
究科〃

Masaki Sutou

Saitama University257

角度分解光電子分光による鉄系超伝導体における擬ギャップの研究

園部

竜也

東京大学

大学院工学系研
ARPES study on pseudogap in iron-pnictides
究科

Tatsuya Sonobe

The University of
Tokyo

258

強いスピン軌道相互作用を有するビスマス化合物超伝導体の研究

坂野

昌人

東京大学

大学院工学系研 Investigation of bismuth compound superconductor withstrong spin-orbit interaction
究科

Masato Sakano

The University of
Tokyo

259

極低温超高分解能レーザー光電子分光装置による超伝導ギャップ測定

鈴木

博人

東京大学

大学院理学系研 Superconducting gap measurements by low-temperature highresolution laser angle-resolved photoemision spectroscopy
究科

Hakuto Suzuki

The University of
Tokyo

260

新規な半導体および半金属の時間分解光電子分
光

石坂

香子

東京大学

大学院工学系研 Time-resolved photoemission spectroscopy on new
semiconductors and semimetals
究科

Kyoko Ishizaka

The University of
Tokyo

261

〃

辻

東京大学

大学院工学系研
究科〃

Hidenori Tsuji

The University of
Tokyo

262

〃

中村

飛鳥

東京大学

大学院工学系研
究科〃

Asuka Nakamura

The University of
Tokyo

263

〃

鈴木

裕也

東京大学

大学院工学系研
究科〃

Yuya Suzuki

The University of
Tokyo

東京大学

大学院工学系研 Time-resolved angle-resolved photoemission study on ironbased superconductors
究科

Takahiro Shimojima

The University ofTokyo

担当所員：辛埴英徳

264 鉄系超伝導体の時間分解角度分解光電子分光

下志万

貴博

265

〃

鈴木

裕也

東京大学

大学院工学系研
究科〃

Yuya Suzuki

The University of
Tokyo

266

〃

中村

飛鳥

東京大学

大学院工学系研
究科〃

Asuka Nakamura

The University of
Tokyo

No．

課題名

トポロジカル絶縁体表面のディラック電子にお267 けるキャリア濃度に依存した非平衡ダイナミク
スの解明
担当所員：末元

氏名
朱

思源

所属

Title

Name

Organization

広島大学

大学院理学研究 Unveiling carrier concentration dependent nonequilibrium
dynamics of Dirac fermions in topological insulators
科

Zhu Siyuan

Hiroshima University

徹

ISSP Activity Report 2014

268

KNiCl3 族化合物結晶における可視 - 近赤外光学
スペクトルの温度変化

三野

弘文

千葉大学

普遍教育センタ Temperature dependence of visible to near-infrared optical
spectra in KNiCl3 -family crystalsー

Hirofumi Mino

Chiba University

269

〃

上村

翔太

千葉大学

大学院理学研究
科〃

Shota Kamimura

Chiba University

270

〃

貞本

貢汰

千葉大学

大学院理学研究
科〃

Kota Sadamoto

Chiba University

271

テラヘルツ分光装置を用いた酸化物磁性材料の
研究

大越

慎一

東京大学

大学院理学系研Study of magnetic oxide using terahertz spectroscopy
究科Shin-ichi Ohkoshi

The University of
Tokyo

272

〃

生井

飛鳥

東京大学

大学院理学系研
究科〃

Asuka Namai

The University of
Tokyo

273

〃

吉清

まりえ

東京大学

大学院理学系研
究科〃

Marie Yoshikiyo

The University of
Tokyo

274

還元型酸化チタンにおける光誘起相転移過程の
研究

上岡

隼人

日本大学

文理学部

Study for photo-induced phase transition processes in reducedHayato Kamioka
type titanium oxides

Nihon University

275 太陽電池の層間移動ダイナミクス

牧野

哲征

福井大学

工学部

Layer transfer dynamics of solar cells

Takayuki Makino

University of Fukui

276

山口

洋脩

福井大学

大学院工学研究科

Yosuke Yamaguchi

University of Fukui

Li ドープ ZnO のエキシトン発光の時間分解発光
内野
測定

隆司

神戸大学

大学院理学研究 Time-resolved photoluminescence measurements on the
exciton emission in Li-doped ZnO
科Takashi Uchino

Kobe University

277

〃

〃

物質合成・評価設備 P クラス / Materials Synthesis and Characterization P Class Researcher

109

No．

課題名

氏名

1

遷移金属酸窒化物、金属間化合物における構造
物性研究

山浦

淳一

東京工業大学

元素戦略研究セ Structural physics on the transition metal oxynitrides andintermetallic compounds
ンター

Junichi Yamaura

Tokyo Institute ofTechnology

2

〃

真木

祥千子

東京工業大学

元素戦略研究センター

Sachiko Maki

Tokyo Institute ofTechnology

3

超臨界二酸化炭素中レーザーアブレーションプ
ラズマの分光イメージング

東京大学

大学院新領域創 Spectroscopic imaging of laser ablation plasmas in supercritical
Sven Stausscarbon dioxide
成科学研究科

シュタウス
スヴェン

所属

Title

〃

Name

Organization

The University of
Tokyo

110
ISSP Activity Report 2014

No．

課題名

氏名

所属

4

〃

姫野

翔平

東京大学

大学院新領域創成科学研究科5パイロクロア型希土類酸化物の単結晶育成と磁気フラストレーションの研究

松平和之

九州工業大学6

電子が複合自由度を持つ遷移金属系物質の純良単結晶育成と物性評価

片山

尚幸

7

〃

杉山

8

〃

中埜

Title

Name

Organization

Shohei Himeno

The University ofTokyo

大学院工学研究 Single crystal growth and study of frustrated magnetism inpyrochlore rare-earth oxides
院

Kazuyuki Matsuhira

Kyushu Institute ofTechnology

名古屋大学

大学院工学研究 Growth of single crystals of transition metal compounds withcharge, orbital and spin degrees of freedom科

Naoyuki Katayama

Nagoya University

由季

名古屋大学

大学院工学研究科〃

Yuki Sugiyama

Nagoya University

彰俊

名古屋大学

大学院工学研究科〃

Akitoshi Nakano

Nagoya University〃

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

課題名

氏名

所属

1

高温高圧水を反応場とした多段階有機合成反応

大友

順一郎

東京大学

大学院新領域創Multi-step organic synthesis in sub- and supercritical water
成科学研究科

Junichiro Otomo

The University of
Tokyo

2

〃

中井

佑輔

東京大学

大学院新領域創成科学研究科

Yusuke Nakai

The University of
Tokyo

3

高温高圧水を用いた医療廃棄物の小型オンサイ
ト処理システムの開発

大友

順一郎

東京大学

大学院新領域創 Development of a small on-site disposal system for medical
waste in sub- and supercritical water
成科学研究科

Junichiro Otomo

The University of
Tokyo

4

〃

長澤

祐介

東京大学

大学院新領域創成科学研究科

Yusuke Nagasawa

The University of
Tokyo

5

高温高圧水中における固体酸・塩基触媒反応の速度論的解析

大友

順一郎

東京大学

大学院新領域創 Kinetic analysis of solid acid and base catalyzed reactions in
sub- and supercritical water
成科学研究科

Junichiro Otomo

The University of
Tokyo

6

〃

秋月

信

東京大学

大学院新領域創成科学研究科

Makoto Akizuki

The University of
Tokyo

7

超臨界水を用いた有機・無機複合廃棄物からのマテリアルリサイクル

大友

順一郎

東京大学

大学院新領域創 Material recycling from organic-inorganic composite waste
using supercritical water
成科学研究科

Junichiro Otomo

The University of
Tokyo

8

〃

松本

祐太

東京大学

大学院新領域創成科学研究科Yuta Matsumoto

The University of
Tokyo

9

アンモニア電気化学的合成反応における新規電極触媒開発と速度論解析

大友

順一郎

東京大学

大学院新領域創 Development of electro-catalysts and kinetic analysis forelectrochemical synthesis of ammonia
成科学研究科

Junichiro Otomo

The University of
Tokyo

10

〃

野田

直人

東京大学

大学院新領域創成科学研究科

Naoto Noda

The University of
Tokyo

Title

〃

〃

〃

〃

〃

Name

Organization

No．

課題名

氏名

11

ケミカルループ法における酸化物イオン伝導体を用いた酸素キャリア材料の寿命評価

大友

順一郎

東京大学

大学院新領域創 Evaluation of life time of metal oxides supported by oxide ion
conductors in chemical looping combustion
成科学研究科

Junichiro Otomo

The University of
Tokyo

12

〃

菊池

典晃

東京大学

大学院新領域創成科学研究科

Noriaki Kikuchi

The University of
Tokyo

13

ぺロブスカイト型酸化物を用いたケミカルルー
ピングシステムの開発

大友

順一郎

東京大学

大学院新領域創 The study of perovskite based oxygen carrier materials for
CLC/CLR applications.
成科学研究科

Junichiro Otomo

The University of
Tokyo

14

〃

東京大学

大学院新領域創成科学研究科

Ochieng James
Ochieng

The University of
Tokyo

岳彦

東京大学

大学院新領域創 Characterization for metal catalysts supported on mesoporous
materials and graphene oxides
成科学研究科

Takehiko Sasaki

The University of
Tokyo

順一郎

東京大学

大学院新領域創 Evaluation of microstructure and proton conductivity intitanium phosphate glass-ceramics
成科学研究科

Junichiro Otomo

The University ofTokyo

Minoru Kadota

The University of
Tokyo

オーチェン
ジェームス
オーチェン

15

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

16

リン酸チタニウムガラス - セラミックスの微構造
大友
観察とプロトン伝導特性

所属

Title

〃

〃

Name

Organization

ISSP Activity Report 2014

17

〃

門田

稔

東京大学

大学院新領域創成科学研究科18

金属酸化物の酸化還元反応における担体効果の
検討

大友

順一郎

東京大学

大学院新領域創
Effect of support materials on redox reaction of metal oxides
成科学研究科

Junichiro Otomo

The University of
Tokyo

19

〃

高坂

文彦

東京大学

大学院新領域創成科学研究科

Fumihiko Kosaka

The University of
Tokyo

20

結晶界面における無機複合型プロトン電解質の合成とイオン伝導度の評価

大友

順一郎

東京大学

大学院新領域創 Synthesis of proton conducting electrolyte and evaluation ofion conductivity at grain boundaries
成科学研究科

Junichiro Otomo

The University of
Tokyo

21

〃

岩永

愛季

東京大学

大学院新領域創成科学研究科Aki Iwanaga

The University of
Tokyo

順一郎

東京大学

大学院新領域創 Evaluation of transportation phenomena in the electrode/electrolyte interface of solid oxide fuel cells
成科学研究科

Junichiro Otomo

The University of
Tokyo

22

固体酸化物形燃料電池の電極 / 電解質界面におけ大友る反応輸送物性の評価

〃

〃

〃

23

〃

橋北

直人

東京大学

大学院新領域創成科学研究科

Naoto Hashikita

The University of
Tokyo

24

高温高圧水を利用した微粒子の in situ 有機修飾
および還元技術の開発

大友

順一郎

東京大学

大学院新領域創 The development of in situ organic modification and reduction
Junichiro Otomo
technology of particles in high temperature and pressure water
成科学研究科The University of
Tokyo

25

〃

岳

東京大学

大学院新領域創成科学研究科Yue Lei

The University of
Tokyo

26

111

27

高温高圧水中における層状固体酸触媒反応
〃

磊

〃

〃

大友

順一郎

東京大学

大学院新領域創 Study on layered solid acid catalyzed reaction in sub- andsupercritical water
成科学研究科

Junichiro Otomo

The University of
Tokyo

名越

詩織

東京大学

大学院新領域創成科学研究科

Shiori Nagoya

The University of
Tokyo

〃

112
ISSP Activity Report 2014

No．

課題名

28

中温作動燃料電池におけるプロトン伝導体の材
料設計および触媒開発

大友

順一郎

東京大学

大学院新領域創 Material design of proton conductor for ITFC and development
Junichiro Otomo
of catalyst
成科学研究科The University of
Tokyo

29

〃

小城

元

東京大学

大学院新領域創成科学研究科Gen Kojo

The University of
Tokyo

大友

順一郎

東京大学

大学院新領域創 The preparation of support catalyst under supercriticalhydrothermal synthesis
成科学研究科

Junichiro Otomo

The University of
Tokyo

東京大学

大学院新領域創成科学研究科

li mengting

The University of
Tokyo

30

超臨界水熱合成による担持触媒の合成

氏名

Title

〃

Name

Organization

31

〃

李

32

有限要素法シミュレーションと材料物性評価に基づく、SOFC システムの性能評価

大友

順一郎

東京大学

大学院新領域創 Evaluation of SOFC performance by finite element method
simulation and material properties
成科学研究科

Junichiro Otomo

The University of
Tokyo

33

〃

宮崎

顕也

東京大学

大学院新領域創成科学研究科Kenya Miyazaki

The University of
Tokyo

桃沢

愛

東京都市大学

工学部

Ai Momozawa

Tokyo City University

Norihiro Yokote

The University of
Tokyo

34

宇宙往還機の熱防御システム (TPS) に向けた
SiC，ZrB2-SiC の動的酸化に関する研究

夢婷

所属

〃

〃
Dynamic oxidation research of SiC, ZrB2-SiC for reusable
launch vehicle

35

〃

横手

寛大

東京大学

大学院新領域創成科学研究科36

高圧合成法による新規パイロクロア型遷移金属
化合物の探索

有馬

孝尚

東京大学

大学院新領域創 Exploration of new transition metal compounds of pyrochlore
structure by means of high-pressure syntheses
成科学研究科Taka-hisa Arima

The University of
Tokyo

37

〃

阿部

伸行

東京大学

大学院新領域創成科学研究科〃Nobuyuki Abe

The University of
Tokyo

38

〃

塩澤

俊介

東京大学

大学院新領域創成科学研究科〃Shunnsuke Shiozawa

The University of
Tokyo

39

〃

鷲見

浩樹

東京大学

大学院新領域創成科学研究科〃

Hiroki Sumi

The University of
Tokyo

薫

東京大学

大学院新領域創 Metallic-covalent bonding conversion of icosahedral cluster in
Kaoru KimuraAl-based approximant crystals
成科学研究科The University ofTokyo

Yoshiki Takagiwa

The University of
Tokyo

40

アルミ系近似結晶中の正 20 面体クラスターの金木村
属結合−共有結合転換

〃

41

〃

高際

良樹

東京大学

大学院新領域創成科学研究科42

パイロクロア格子またはカゴメ格子をもつ遷移金属フッ化物の構造解析

植田

浩明

京都大学

大学院理学研究 Structural analysis of transition metal fluorides with apyrochlore lattice or a kagome lattice科

Hiroaki Ueda

Kyoto University

43

〃

小林

慎太郎

京都大学

大学院理学研究
科〃

Shintaro Kobayashi

Kyoto University

44

〃

山川

智大

京都大学

大学院理学研究
科〃

Tomohiro Yamakawa Kyoto University

〃

No．

課題名

氏名

45

SOFC 空気極酸素還元反応に対する SOFC 製造
プロセス由来微量成分の影響評価

大友

順一郎

東京大学

大学院新領域創 The effects of minor components in SOFC cathode on oxygen
reduction reaction
成科学研究科

Junichiro Otomo

The University of
Tokyo

46

〃

大石

淳矢

東京大学

大学院新領域創成科学研究科

Junya Oishi

The University of
Tokyo

47

超臨界水熱合成による酸化物コンポジットナノ
粒子の合成とその生成ダイナミクス解明

大友

順一郎

東京大学

大学院新領域創 Elucidation of formation dynamics for oxide composite
nanoparticles under supercritical hydrothermal synthesis
成科学研究科

Junichiro Otomo

The University of
Tokyo

48

〃

横

東京大学

大学院新領域創成科学研究科

Akira Yoko

The University of
Tokyo

49

複合酸化物ナノ粒子の超臨界水熱合成手法の検
討

大友

順一郎

東京大学

大学院新領域創 Study of compound oxide nano-particles using supercriticalhydrothermal synthesis
成科学研究科

Junichiro Otomo

The University of
Tokyo

50

〃

加藤

進介

東京大学

大学院新領域創成科学研究科

Shinsuke KatoThe University of
Tokyo

寛子

北海道大学

触媒化学研究セ
Detection of oxygen vacancy in rutile TiO2 single crystal
ンター

Hiroko Ariga

Hokkaido University

岳彦

東京大学

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

Takehiko Sasaki

The University of
Tokyo

板子

健太郎

東京大学

大学院新領域創成科学研究科

Kentaro Itako

The University of
Tokyo

田島

裕之

兵庫県立大学

大学院物質理学
Reflectivity measurement of organic thin films
研究科

Hiroyuki Tajima

The Univerisity of
Hyogo

哲

51

Rutile 型 TiO2 の酸素欠陥分布観測

有賀52

触媒反応の insitu ラマン散乱測定

佐々木

53
54

〃
有機薄膜の反射率測定

所属

Title

〃

〃

〃

〃

Name

Organization

ISSP Activity Report 2014

55

〃

佐藤

井一

兵庫県立大学

大学院物質理学研究科〃

Seiichi SatoThe Univerisity of
Hyogo

56

〃

西岡

友輔

兵庫県立大学

大学院物質理学研究科〃

Yusuke Nishioka

The Univerisity of
Hyogo

57

〃

宮尾

文啓

兵庫県立大学

大学院物質理学研究科〃

Fumitaka Miyao

The Univerisity of
Hyogo

英司

産業技術総合研 エネルギー技術 Development of secondary battery materials by thenanostructure control
究所
研究部門

Eiji Hosono

National Institute ofAdvanced Industrial
Science and Technology

産業技術総合研 ナノシステム研 Continuous synthesis of functional metal oxide nanoparticles
using a micromixer
究所
究部門

Kiwamu Sue

National Institute ofAdvanced Industrial
Science and Technology

113

58

ナノ構造制御による二次電池材料開発

細野

59

マイクロミキサを用いた機能性酸化物ナノ粒子
の連続合成

陶

60

新規磁石材料の微細構造解析

齋藤哲治

千葉工業大学

工学部

61

天然鉱物の微細組織と結晶性の実態

永嶌

真理子

山口大学

大学院理工学研 Evaluation of micro-texture and crystallinity of naturalminerals
究科

究Microstructural studies of newly developed permanent magnet
Tetsuji Saito
materials
Mariko Nagashima

Chiba Institute ofTechnology
Yamaguchi University

114
ISSP Activity Report 2014

No．

課題名

62

ハーフメタル型 Mn 基ホイスラー合金の磁性と輸送特性に関する研究

重田

出

鹿児島大学

大学院理工学研 Study on the magnetic and transport properties of half-metallic
Iduru Shigeta
Mn-based Heusler alloys
究科

Kagoshima University

63

〃

重松

理史

鹿児島大学

大学院理工学研
究科

Satoshi Shigematsu

Kagoshima University

廣井

政彦

鹿児島大学

大学院理工学研 Study on the magnetic and electrical properties of Heusler
compounds
究科

Masahiko Hiroi

Kagoshima University

田底

知也

鹿児島大学

大学院理工学研
究科

Tomoya Tazoko

Kagoshima University

価数揺動を起こす希土類元素を含む Zintl 相の磁
白子
気特性

雄一

名古屋大学

大学院工学研究 Magnetic properties of Zintl phase including mixed valence
rare earth element.
科

Yuichi Shirako

Nagoya University

Yuta Saito

Nagoya University

64
65
66

ホイスラー型化合物の磁性と伝導の研究
〃

氏名

所属

Title

〃

〃

Name

Organization

67

〃

齋藤

雄太

名古屋大学

大学院工学研究科

68

新規 A サイト秩序型ペロブスカイト複酸化物の
物性

志村

元

名古屋大学

大学院工学研究
Properties of novel A-site ordered perovskite oxides
科

Gen Shimura

Nagoya University

69

新規遷移金属硫化物固溶体の磁気物性

長谷川

正

名古屋大学

大学院工学研究
Magnetism of novel transition metal sulfide solid solutions科

Masashi Hasegawa

Nagoya University

Takahiro Akita

Nagoya University

Yoshihiko Okamoto

Nagoya University

Ryuji Tamura

Tokyo University of
Science

〃

70

〃

秋田

貴弘

名古屋大学

大学院工学研究科71

水熱合成法による新しい幾何学的フラストレート磁性体の探索

岡本

佳比古

名古屋大学

大学院工学研究 Hydrothermal synthesis of novel geometrically frustrated
antiferromagnets
科72

正 20 面体準結晶と近似結晶の磁性田村隆治

東京理科大学

基礎工学部〃

Magnetic properties of icosahedral quasicrystal and its
approximant crystals

73

〃

廣戸

孝信

東京理科大学

大学院基礎工学研究科〃

Takanobu Hiroto

Tokyo University of
Science

74

〃

木下

雄太

東京理科大学

大学院基礎工学研究科〃

Yuta Kinoshita

Tokyo University of
Science

75

〃

古田島

尭宏

東京理科大学

大学院基礎工学研究科〃

Takahiro Kotajima

Tokyo University of
Science真帆人

横浜国立大学

大学院工学研究 Precipitation behavior and magnetic properties of finemagnetic particles in Cu ‐ Ni base alloys single crystal
院

Mahoto Takeda

Yokohama National
University

76

Cu − Ni − X（X=Co,Fe）系単結晶性合金中の磁竹田性微粒子析出過程と磁気特性の関係

77

〃

李

東海

横浜国立大学

大学院工学府〃Lee donghae

Yokohama National
University

78

〃

金

俊燮

横浜国立大学

大学院工学府〃Kim Junseop

Yokohama National
University

No．
79

課題名

氏名

アルミ系近似結晶中の正 20 面体クラスターの金佐々木
属結合−共有結合転換

友彰

所属
東京学芸大学

Title

Name

大学院教育学研 Metallic-covalent bonding conversion of icosahedral cluster in
Tomoaki Sasaki
Al-based approximant crystals
究科

Organization
Tokyo Gakugei
University

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

課題名

氏名

1

土壌中のフッ素反応輸送の評価

パディ
ンバリ

2

水の光分解触媒物質上の修飾薄膜物質の電子物
性の研究

山田

3

サカ

所属

Title

Name

Organization

東京大学

大学院新領域創
Evaluating reactive transport of fluorine in soil
成科学研究科Padhi Sakambari

The University of
Tokyo

太郎

東京大学

大学院工学系研 Electronic physics of thin layers fabricated on water-splitting
photocatalysts
究科

Taro Yamada

The University of
Tokyo

FTIR を用いて，古人骨より抽出したコラーゲン
蔦谷の組成を確認する匠

東京大学

大学院新領域創 Checking the composition of collagen extracted from ancienthuman bones by using FTIR
成科学研究科

Takumi Tsutaya

The University of
Tokyo

4

超臨界水を用いた連続式下水汚泥ガス化プロセ
スの検討

布浦

鉄平

東京大学

環境安全研究セ Investigation of continuous gasification of sewage using
supercritical water
ンター

Teppei Nunoura

The University of
Tokyo

5

〃

福井

啓祐

東京大学

大学院新領域創成科学研究科〃

Keisuke Fukui

The University of
Tokyo

Title

Name

Organization

Hisao Kiuchi

The University ofTokyo

北陸先端科学技 マテリアルサイ Studies on the magnetic properties of rare earth magnetic
material by first-principles calculations
術大学院大学
エンス研究科Yuya Yamanouchi

Japan Advanced
Institute of Scienceand Technology

北陸先端科学技 マテリアルサイ Elucidation of the magnetic anisotropy due to the crystal field
analysis
術大学院大学
エンス研究科Kei Yamauchi

Japan Advanced
Institute of Scienceand Technology

長期留学研究員 / Long Term Young Researcher

ISSP Activity Report 2014

No．

課題名

氏名

1

窒素ドープ炭素材料の酸素還元反応メカニズム
の解明

木内

2

第一原理計算による希土類磁性材料の磁気特性に関する研究山之内

3

結晶場解析による磁気異方性の解明

山内

久雄
佑也
圭

所属
東京大学

大学院工学系研 Study of the oxygen reduction reaction of nitrogen-dopedcarbon materials
究科

115

No．

課題名

氏名

116

平成 26 年度 中性子科学研究施設
No．

課題名

所属

Title

Name

Organization

共同利用課題一覧 / Joint Research List of Neutron Scattering Researcher 2014

指名

所属

Title

Name

Organization

ISSP Activity Report 2014

・申請装置 4G: GPTAS
1GPTAS（汎用 3 軸中性子分光器）IRT 課題

卓

東北大学

多元物質科学研
IRT: GPTAS (Triple Axis Spectrometer)究所

2中性子 - Ｘ線データの同時解析によるナトリウム亀田 恭男
イオンの水和構造の解明

山形大学

理学部

3

Dy3Al5O12 ガーネットにおけるクーロン相の探
索

佐藤 卓

東北大学

多元物質科学研
Search for Coulomb phase in the Dy3Al5O12 garnet
究所

Taku J Sato

Tohoku University4

共晶組成 Au-Si 合金固体の構造

佐藤 卓

東北大学

多元物質科学研 Structure determination of the solidified Au-Si Alloys ateutectic composition
究所

Taku J Sato

Tohoku University5

強磁性超伝導体 UCoGe におけるスピン揺らぎの
佐藤 憲昭
研究

名古屋大学

理学研究科物質 Study on spin fluctuations of the superconducting ferromagnet
Noriaki Sato
理学専攻（物理） UCoGe

Nagoya University

6

CeTe3 および TbTe3 における量子臨界現象および磁性と超伝導の相関の研究

佐藤 憲昭

名古屋大学

理学研究科物質 Study on the quantum criticality and correlation of magnetism
Noriaki Sato
理学専攻（物理） and superconductivity in CeTe3 and TbTe3

Nagoya University

7重い電子系超伝導体 CeRhxIr(1-x)In5 における磁佐藤 憲昭
性と超伝導の相関の研究

名古屋大学

理学研究科物質 Study on the correlation of magnetism and superconductivity
理学専攻（物理） in CeRhxIr(1-x)In5

Nagoya University

8

時間分割中性子散乱測定による磁気構造変化過程の実時間追跡東京理科大学

理工学部学科

9

中性子回折法による六方晶フェライト
Ba2Zn2Fe12O22 および BaFe12O19 系の超交換相 内海 重宜
互作用に関する研究

諏訪東京理科大学

システム工学部
Study on superexchange interaction of Ba2Zn2Fe12O22 and機械システムBaFe12O19 systems by neutron diffraction
工学科

Shigenori Utsumi

Tokyo University of
Science, Suwa

10

AFeAs (A = Li, Na) の超伝導対称性

南部 雄亮

東北大学

多元物質科学研
Superconducting pairing symmetry in AFeAs (A = Li, Na)
究所

Yusuke Nambu

Tohoku University

11

パイロクロア磁性体における格子ー軌道ースピ
ン観測とスピン流、異常 ホール効果への影響

古川 はづきお茶の水女子大 大学院人間文化
Neutron study on pyrochlore oxide materials
学
創成科学研究科

Hazuki Furukawa

Ochanomizu
University12

強磁性超伝導体における自発的磁束格子構造の研究

古川 はづきお茶の水女子大 大学院人間文化
Spontaneous vortex phase in ferromagnetic superconductors
学
創成科学研究科

Hazuki Furukawa

Ochanomizu
University

13

Sr2Ruo4 の非弾性散乱

古川 はづきお茶の水女子大 大学院人間文化
Inelastic neutron scattering experiments on Sr2RuO4
学
創成科学研究科

Hazuki Furukawa

Ochanomizu
University

14

YbCo2Zn20 における圧力誘起磁気秩序相の研究

松林 和幸

東京大学

物性研究所

MATSUBAYASHI,
Kazuyuki

The University of
Tokyo

15

強磁性量子臨界点近傍の遍歴電子フラストレー
ト磁性体 Fe3Mo3N およびその Co 置換系の動的 田畑 吉計
スピン相関

京都大学

大学院工学研究 Dynamic spin correlations in novel itinerant-electron frustrated
Yoshikazu Tabatamagnets Fe3Mo3N and its Co-substituted systems
科

Kyoto University

佐藤

元屋 清一郎Taku J Sato

Hydration structure of Na+ by means of simultaneous analysis
KAMEDA Yasuo
of neutron and X-ray diffraction data

Noriaki Sato

物理 Real-time observation of magnetic structural change by means
Kiyoichiro Motoya
of time-resolved neutron scattering experiments

Pressure-induced magnetic phase transition in YbCo2Zn20

Tohoku University
Yamagata University

Tokyo University of
Science

No．

課題名

氏名

所属

Title

Name

Organization

16

EuRu2P2 の磁気構造解析

藤原 哲也

山口大学

大学院理工学研
Magnetic structure analysis of EuRu2P2
究科

Tetsuya Fujiwara

Yamaguchi University

17

EuCo2P2 の磁気構造解析

藤原 哲也

山口大学

大学院理工学研
Magnetic structure analysis of EuCo2P2
究科

Tetsuya Fujiwara

Yamaguchi University18

強誘電体の相転移機構（変位型及び秩序−無秩序重松 宏武型）に関する統一的理解の確立

山口大学

教育学部

19

スピンアイスにおけるトポロジカル相転移

門脇 広明

首都大学東京理工学研究科物理学専攻

20

ホールドープ型鉄系超伝導体のスピン揺動

李 哲虎

21

ダイマーモット絶縁体 κ-(BEDTTTF)2Cu[N(CN)2]Cl におけるマルチフェロイク
スと電荷揺らぎ・分子格子ダイナミクス

22

Establishment of the unified explanation about the phasetransition mechanism (displacive and order-disorder type) in
Ferroelectrics

Hirotake Shigematsu Yamaguchi University
Hiroaki Kadowaki

Tokyo Metropolitan
University

産業技術総合研 エネルギー技術
Spin fluctuations of hole-doped Fe-based superconductors
究所
研究部門

Chul-Ho Lee

National Institute ofAdvanced Industrial
Science and Technology

松浦 直人

東海事業センタ
総合科学研究機ー利用研究促進構部

Masato Matsuura

CROSS-Tokai

Ca10Pt4As8(Fe1-xPtxAs)10 (x ~ 0.2) の光学フォノ
池内 和彦
ンと軌道揺らぎ

総合科学研究機 東海事業センタ
構ーKazuhiko Ikeuchi

CROSS-Tokai

Takatsugu Masuda

The University ofTokyo・申請装置 5G: PONTA

ISSP Activity Report 2014

23

PONTA（高性能偏極中性子散乱装置）IRT 課題 益田

24

PONTA（高性能偏極中性子散乱装置）IRT 課題
偏極中性子線を用いた磁気散乱中性子線ホログ 林
ラフィー

25

隆嗣

117

東京大学

物性研究所

好一

東北大学

金属材料研究所 IRT: PONTA (Polarized Neutron Triple Axis Spectrometer)

Koichi Hayashi

Tohoku University

中性子回折によるアルカリ金属ナノクラスター
強磁性体の研究

中野 岳仁

大阪大学

理学研究科物理 Neutron diffraction study on ferromagnetism of alkali-metal
nanoclusters arrayed in zeolite crystal
学専攻

Takehito Nakano

Osaka University

26

時間分割中性子散乱測定による磁気構造変化過程の実時間追跡元屋 清一郎

東京理科大学

理工学部
学科

27

NiGa2S4 におけるスピンネマティック相関の検
出

南部 雄亮

東北大学

多元物質科学研 Detection of spin nematic correlation in the 2D magnet
NiGa2S4
究所

28

マルチフェロイックス Ba2CoGe2O7 におけるエレクトロマグノンの偏極解析

左右田 稔

東京大学

物性研究所

29

S=1/2 正四面体をもつ Ba3Yb2Zn5O11 の磁気励
起

左右田 稔

東京大学

30

スピン格子結合系における磁気相転移と電気分極の一軸応力制御

満田 節生

31

希釈反強磁性体 HoxY1-xRu2Si2 における動的長距離磁気相関状態とパーコレーション転移

田畑 吉計

IRT: PONTA (Polarized Neutron Triple Axis Spectrometer)

物理 Real-time observation of magnetic structural change by means
Kiyoichiro Motoya
of time-resolved neutron scattering experiments

Tokyo University of
Science

Yusuke Nambu

Tohoku University

Polarization Analyses of Electromagnon in Multiferroics
Ba2CoGe2O7

Minoru Soda

The University of
Tokyo

物性研究所

Magnetic excitation of Ba3Yb2Zn5O11 having perfect S=1/2
tetrahedra

Minoru Soda

The University ofTokyo

東京理科大学

理学部

Uniaxial-stress control of magnetic phase transition andelectric polarization in a spin-lattice coupled system

Setsuo Mitsuda

Tokyo University of
Science

京都大学

Dynamically-fluctuating long-range correlated state and
大学院工学研究percolation transition in the diluted antiferromagnet
科
HoxY1-xRu2Si2

Yoshikazu Tabata

Kyoto University

物理

118

No．

課題名

氏名

所属

Title

Name

Organization

ISSP Activity Report 201432

秩序型ペロブスカイト CaCu3Ti4O12 のフォノン 留野 泉

秋田大学

Phonons in ordered perovskite CaCu3Ti4O12

Izumi Tomeno

Akita University

33

混晶系 Ba1-xCaxTiO3 のフォノン

留野 泉

秋田大学

Phonons in Ba1-xCaxTiO3

Izumi Tomeno

Akita University

34

NdCoO3 の格子ダイナミックス

留野 泉

秋田大学

Lattice dynamics in NdCoO3

Izumi Tomeno

Akita University

35

カゴメ三角格子反強磁性体 NaBa2Mn3F11 の磁気
益田 隆嗣
状態

東京大学

Magnetic state in Kagome-Triangular antiferromagnet
NaBa2Mn3F11

Takatsugu Masuda

The University of
Tokyo

36

アルカリ超酸化物 KO2 の磁気励起

益田 隆嗣

東京大学

物性研究所

Magnetic excitation in Alkali superoxide KO2

Takatsugu Masuda

The University of
Tokyo

37

URu2Si2 の隠れた秩序に伴う多重極秩序の直接
観測

秋光 純

青山学院大学

理工学部

Direct observation of the “Hidden Order” due to multipole
ordering in URu2Si2

Jun Akimitsu

Aoyama-Gakuin
University38

導電性三角格子磁性体 PdCrO2 の反強磁性秩序とスピンカイラリティ

高津 浩

首都大学東京理工学研究科

Antiferromagnetism and its relation to the spin chirality in the
Hiroshi Takatsu
metallic triangular-lattice magnet PdCrO2

Tokyo Metropolitan
University39

カイラル磁性体 CsCuCl3 のカイラルらせん磁気
構造の検出

高阪 勇輔

青山学院大学

理工学部

Chiral helimagnetic structure in Chiral inorganic compound
CsCuCl3

Yusuke Kousaka

Aoyama-Gakuin
University

40

Ca10Pt4As8(Fe1-xPtxAs)10 (x ~ 0.2) の光学フォノ
池内 和彦
ンと軌道揺らぎ

総合科学研究機 東海事業センタ
構ーKazuhiko Ikeuchi

CROSS-Tokai

41

Ca10Pt4As8(Fe1-xPtxAs)10 (x ~ 0.2) の偏極中性ビ
池内 和彦ームによる磁気非弾性散乱

総合科学研究機 東海事業センタ
構ーKazuhiko Ikeuchi

CROSS-Tokai42

スピンフラストレート系 1147 フェライトの磁気
蒲沢 和也
励起 - 中性子散乱による -総合科学研究機
利用研究促進部
構

Kazuya Kamazawa

CROSS-Tokai43

偏極中性子を用いた Cu3Mo2O9 単結晶の磁気構
造の決定

長谷 正司

物質材料研究機 中性子散乱グル Determination of the magnetic structure of a Cu3Mo2O9 single
Masashi Hase
crystal using polarized neutrons
構ープNational Institute forMaterials Science

44(CuZn)3Mo2O9 単結晶の磁気反射の測定

長谷 正司

物質材料研究機 中性子散乱グル Measurements of magnetic reflections in a (CuZn)3Mo2O9
single crystal
構ープ

National Institute forMaterials Science

Masashi Hase

・申請装置 6G: TOPAN
和晃

東北大学

大学院理学研究 IRT: TOPAN (Tohoku-University Polarization Analysis Neutron
Kazuaki Iwasa
Spectrometer)科

Tohoku University

46

富安 啓輔

東北大学

大学院理学研究 Magnetic structure and excitations in frustrated 5d pyrochlore
Keisuke Tomiyasu
oxide Nd2Ir2O7 with metal- insulator transition
科

Tohoku University47

全対称型多極子秩序による金属−非金属転移に対岩佐 和晃
する磁気不純物効果

東北大学

大学院理学研究 Magnetic impurity effect on the metal-nonmetal transition with
Kazuaki Iwasa
totally-symmetric electron multipole ordering
科

Tohoku University

45

TOPAN（東北大理：３軸型偏極中性子分光器）
岩佐
IRT 課題

No．

課題名

氏名

所属

Title

Name

Organization

ISSP Activity Report 201448

Ce3Co4Sn13 における磁気励起：強相関電子系の
岩佐 和晃
候補として

東北大学

大学院理学研究 Magnetic excitation in Ce3Co4Sn13: a candidate for strong
electronic correlation system
科

Kazuaki Iwasa

Tohoku University

49

PrT2Zn20 (T = Ru, Rh, Os, Ir) における非Kramers 二重項基底状態のエントロピー解放過
程

岩佐 和晃

東北大学

大学院理学研究 Entropy releases of the non-Kramers doublet ground states in
PrT2Zn20 (T = Ru, Rh, Os, Ir)
科

Kazuaki Iwasa

Tohoku University50

質量勾配をもつ非一様系での偏在的原子振動モードであるグレードンの検証

岩佐 和晃

東北大学

大学院理学研究 Gradon as a localized atomic motion in mass-graded
inhomogeneous systems
科

Kazuaki Iwasa

Tohoku University

51

遍歴電子反強磁性体 Mn3Si における動的スピン階層構造の研究平賀 晴弘

高エネルギー加 物質構造科学研
速器研究機構究所

Haruhiro Hiraka

KEK

52

CeTe における圧力誘起反強四極子秩序

松村 武

広島大学

大学院先端物質
Pressure induced antiferroquadrupole order in CeTe
科学研究科

Takeshi Matsumura

Hiroshima University

53

Ce0.5La0.5B6 における磁気八極子秩序の検証

松村 武

広島大学

大学院先端物質
Magnetic octupole order in Ce0.5La0.5B6
科学研究科

Takeshi Matsumura

Hiroshima University

54

Ce0.7La0.3B6 の一軸圧下中性子回折桑原 慶太郎

茨城大学

大学院理工学研 Neutron diffraction study of Ce0.7La0.3B6 under uniaxialpressure
究科

Keitaro Kuwahara

Ibaraki University

55

新規 T’ 構造ホールドープ銅酸化物
Pr2-xCaxCuO4 における磁気相関の研究

藤田 全基

東北大学

金属材料研究所

Study of spin correlations in novel T’ -structured cuprate oxide
Masaki Fujita
Pr2-xCaxCuO4

Tohoku university

56

高精度測定による Fe-LSCO の異方的磁気秩序ピ
藤田 全基ークの起源の研究

東北大学

金属材料研究所

Origin of anisotropic magnetic peak in Fe-LSCO studied byhigh resolution neutron-scattering measurement

Masaki Fujita

Tohoku university

57

新規スピンラダー系 BiCu2PO6 の磁気相関の研
究東北大学

金属材料研究所

Study of magnetic correlations in novel spin-ladder system
BiCu2PO6

Masaki Fujita

Tohoku university

淳

茨城大学

理学部理学科IRT: HER(High Energy Resolution Triple-Axis Spectrometer)

Makoto Yokoyama

Ibaraki University

佐藤 卓

東北大学

多元物質科学研
Search for coulomb phase in the Dy3Al5O12 garnet
究所

Taku J Sato

Tohoku University

藤田 全基

・申請装置 C1-1: HER

119

58

HER ( 高エネルギー分解能３軸型中性子分光器 )横山
IRT 課題59

Dy3Al5O12 ガーネットにおけるクーロン相の探索60

強磁性超伝導体 UCoGe におけるスピン揺らぎの
佐藤 憲昭
研究

名古屋大学

理学研究科物質 Study on spin fluctuations of the superconducting ferromagnet
Noriaki Sato
理学専攻（物理） UCoGe

Nagoya University

61

CeTe3 および TbTe3 における量子臨界現象および磁性と超伝導の相関の研究

佐藤 憲昭

名古屋大学

理学研究科物質 Study on the quantum criticality and correlation of magnetism
Noriaki Sato
理学専攻（物理） and superconductivity in CeTe3 and TbTe3

Nagoya University

62

重い電子系超伝導体 CeRhxIr(1-x)In5 における磁性と超伝導の相関の研究

佐藤 憲昭

名古屋大学

理学研究科物質 Study on the correlation of magnetism and superconductivity
理学専攻（物理） in CeRhxIr(1-x)In5

Noriaki Sato

Nagoya University

63

鉄系梯子型物質 BaFe2Se3 の磁気搖動

南部 雄亮

東北大学

多元物質科学研
Spin dynamics of the iron-based ladder compound BaFe2Se3
究所

Yusuke Nambu

Tohoku University

120

No．

課題名

氏名

所属

Title

多元物質科学研
Superconducting pairing symmetry in AFeAs (A = Li, Na)
究所

Name

Organization

ISSP Activity Report 2014

64

AFeAs (A = Li, Na) の超伝導対称性

南部 雄亮

東北大学

65

Sr2RuO4 の非弾性散乱

古川 はづきお茶の水女子大 大学院人間文化
Inelastic neutron scattering experiments on Sr2RuO4
学
創成科学研究科66

全対称型多極子秩序による金属−非金属転移に対岩佐 和晃
する磁気不純物効果

東北大学

大学院理学研究 Magnetic impurity effect on the metal-nonmetal transition with
Kazuaki Iwasa
totally-symmetric electron multipole ordering
科

Tohoku University

67

Ce3Co4Sn13 における磁気励起：強相関電子系の
岩佐 和晃
候補として

東北大学

大学院理学研究 Magnetic excitation in Ce3Co4Sn13: a candidate for strong
electronic correlation system
科

Kazuaki Iwasa

Tohoku University

68

PrT2Zn20 (T = Ru, Rh, Os, Ir) における非Kramers 二重項基底状態のエントロピー解放過
程

岩佐 和晃

東北大学

大学院理学研究 Entropy releases of the non-Kramers doublet ground states in
PrT2Zn20 (T = Ru, Rh, Os, Ir)
科

Kazuaki Iwasa

Tohoku University

69

DyFe2Zn20 における異方性変化を伴う逐次磁気
相転移

岩佐 和晃

東北大学

大学院理学研究 Successive magnetic phase transition accompanying switch inmagnetic anisotropy of DyFe2Zn20
科

Kazuaki Iwasa

Tohoku University70

スピン格子結合系 CuFeO2 のスピン波分散関係の一軸応力変化

満田 節生

東京理科大学

理学部

Spin wave dispersion relation in a spin-lattice coupled system
CuFeO2 ander uniaxial stressSetsuo Mitsuda

Tokyo University of
Science71

強磁性量子臨界点近傍の遍歴電子フラストレー
ト磁性体 Fe3Mo3N およびその Co 置換系の動的 田畑 吉計
スピン相関

京都大学

大学院工学研究 Dynamic spin correlations in novel itinerant-electron frustrated
Yoshikazu Tabatamagnets Fe3Mo3N and its Co-substituted systems
科

Kyoto University72

希釈反強磁性体 HoxY1-xRu2Si2 における動的長距離磁気相関状態とパーコレーション転移

田畑 吉計

京都大学

Dynamically-fluctuating long-range correlated state and
大学院工学研究percolation transition in the diluted antiferromagnet
科
HoxY1-xRu2Si2

Yoshikazu Tabata

Kyoto University73

正方格子磁性体における新規磁気相の探索

益田 隆嗣

東京大学

物性研究所

Novel magnetic state in a series of new square-lattice magnets Takatsugu Masuda

The University of
Tokyo

74

酸素吸着 Cu ジカルボン酸の低エネルギー励起

益田 隆嗣

東京大学

物性研究所

Low energy excitation in O2 adsorbed Cu-dicarboxylic acid

Takatsugu Masuda

The University of
Tokyo

75

空間反転対称性と磁性

繁岡 透

山口大学

大学院理工学研 Magnetism in non-centrosymmetoric and centrosymmetricsystems
究科

Toru Shigeoka

Yamaguchi University

76

新規 T’ 構造ホールドープ銅酸化物
Pr2-xCaxCuO4 における磁気相関の研究

藤田 全基

東北大学

金属材料研究所

Study of spin correlations in novel T’ -structured cuprate oxide
Masaki Fujita
Pr2-xCaxCuO4

Tohoku university

77

高精度測定による Fe-LSCO の異方的磁気秩序ピ
藤田 全基ークの起源の研究

東北大学

金属材料研究所

Origin of anisotropic magnetic peak in Fe-LSCO studied byhigh resolution neutron-scattering measurement

Masaki Fujita

Tohoku university78

量子スピン液体の研究

門脇 広明

首都大学東京理工学研究科物理学専攻

Hiroaki Kadowaki

Tokyo Metropolitan
University

79

量子臨界点近傍にある YbCo2Zn20 の磁気励起

阿曽 尚文

琉球大学

理学部物質地球 Magnetic excitations in YbCo2Zn20 in vicinity of a quantum
critical point
科学科

Naofumi Aso

University of the
Ryukyus80

空間反転対称性をもたない超伝導体 CeRhSi3 の
磁気励起

阿曽 尚文

琉球大学

理学部物質地球 Magnetic fluctuations in a non-centrosymmetricsuperconductor CeRhSi3
科学科

Naofumi Aso

University of the
Ryukyus

物理

Yusuke Nambu

Tohoku University

Hazuki Furukawa

Ochanomizu
University

No．

課題名

氏名

81

ホールドープ型鉄系超伝導体のスピン揺動

李 哲虎

82

ダイマーモット絶縁体 κ-(BEDT-TTF)2Cu2(CN)3
松浦 直人
におけるスピン液体状態の研究

所属

Title

Name

Organization

産業技術総合研 エネルギー技術
Spin fluctuations of hole-doped Fe-based superconductors
究所
研究部門

Chul-Ho Lee

National Institute ofAdvanced Industrial
Science and Technology

東海事業センタ
総合科学研究機ー利用研究促進構部

Masato Matsuura

CROSS-Tokai・申請装置 C1-2: SANS-U
83

SANS-U（二次元位置測定小角散乱装置）IRT 課
柴山
題

84

ナノディスクの構造と集積化挙動の評価

85

充弘

IRT: SANS-U (Small Angle Neutron Scattering Instrument, The
The University of
Mitsuhiro Shibayama
University of Tokyo)
Tokyo

ISSP Activity Report 2014

121

東京大学

物性研究所

中野 実

富山大学

大学院医学薬学
Structure and stacking behavior of nanodiscs
研究部

Minoru Nakano

University of Toyama

膜貫通ペプチドのフリップフロップ誘起能の評
価

中野 実

富山大学

大学院医学薬学
Induction of flip-flop by transmembrane peptides
研究部

Minoru Nakano

University of Toyama

86

膜脂質のダイナミクスに及ぼす膜の曲率の評価

中野 実

富山大学

大学院医学薬学
Effects of curvature on dynamics of membrane lipids
研究部

Minoru Nakano

University of Toyama

87

中性子小角散乱法による多孔性放射線合成ゲルのナノ構造解析

佐藤 信浩

京都大学

原子炉実験所

Nobuhiro Sato

Kyoto University

88

中性子小角散乱実験による Sr2RuO4 の異常金属状態の研究

古川 はづきお茶の水女子大 大学院人間文化 Anomalous vortex state in Sr2RuO4 studied by SANS
学
創成科学研究科 experiments

Hazuki Furukawa

Ochanomizu
University89

空間反転対称性の破れた超伝導体のヘリカル磁束格子の観測古川 はづきお茶の水女子大 大学院人間文化
Herical vortex phase on non-centrosymmetric superconductors Hazuki Furukawa
学
創成科学研究科

Ochanomizu
University

90

Fe 系超伝導体の磁束研究

古川 はづきお茶の水女子大 大学院人間文化
Vortex study on Fe-based superconductors
学
創成科学研究科

Hazuki Furukawa

Ochanomizu
University

91

希釈冷凍機温度領域における CeCoIn5 の磁束構
造の磁場方向依存性

古川 はづきお茶の水女子大 大学院人間文化 Field direction dependence of vortex lattice structure on
学
創成科学研究科 CeCoIN5 in Dilution temperature.

Hazuki Furukawa

Ochanomizu
University92

強磁性超伝導体における自発的磁束格子構造の研究

古川 はづきお茶の水女子大 大学院人間文化
Spontaneous vortex phase in ferromagnetic superconductors
学
創成科学研究科

Hazuki Furukawa

Ochanomizu
University

93

イオン液体と界面活性剤の混合物の相分離現象

吉田 亨次

福岡大学

理学部

Phase separation of ionic liquids and surfactant mixtures

Koji Yoshida

Fukuoka University

94

金属磁性体 MnP における長周期ドメイン磁気構
山崎 照夫
造の観測

東京理科大学

理工学部

Observation of the long period magnetic domain structure inmetallic helimagnet MnP

Teruo Yamazaki

Tokyo University of
Science95

ナノスケールにおける Arfaptin タンパク質によるリン脂質ベシクルの変形

山田 悟史

高エネルギー加 物質構造科学研
速器研究機構究所

Norifumi L. Yamada

KEK

96

クラフト転移で自発形成するベシクルの臨界ベ
シクル濃度近傍でのダイナミクス

川端 庸平

首都大学東京Youhei Kawabata

Tokyo Metropolitan
University

理工学研究科SANS analysis on the nano structure of radiation-synthesizedporous polymer gels

122

No．

課題名

氏名

所属

Title

Name

Organization

ISSP Activity Report 201497

crowding 環境下における生体脂質リポソームと
平井 光博
タンパク質の相互作用

群馬大学

理工学研究院（荒牧）

98

GM1 含有 Bicelle に結合したタンパク質の構造
変化

杉山 正明

京都大学

原子炉実験所99

温度および塩濃度応答性界面不活性／界面活性転移高分子のミセル形成とナノ構造転移

松岡 秀樹

京都大学

Micelle formation and nanostructure transition of temperature
工学研究科高分
and salt concentration responsive non-surface active/surface
Hideki Matsuoka
子化学専攻
active transition

Kyoto University

100 二軸延伸フィルムの広い空間スケールでの解析

松葉 豪

山形大学

大学院理工学研 Structural analysis of biaxially oriented films in the wide
spatial scale
究科

Go Matsuba

Yamagata University

101 毛髪の内部構造解析

柴山 充弘

東京大学

物性研究所中Structural analysis of hair

Mitsuhiro Shibayama

The University of
Tokyo

Interaction between protein and lipid liposome under crowding
Mituhiro HIRAI
environment
Masaaki Sugiyama

Gunma University
Kyoto University102

均一な両親媒性共連続相構造を有する高分子ゲ
ルの構造解析

柴山 充弘

東京大学

物性研究所

Structure study on amphiphilic ideal co-network gel

Mitsuhiro Shibayama

The University of
Tokyo

103

ビタミン E 内包マイクロエマルションの構造に
関する研究

柴山 充弘

東京大学

物性研究所

Study on structure of vitamin E microemulsion

Mitsuhiro Shibayama

The University of
Tokyo

104

親油性高分子電解質ゲルの各種誘電率を持つ溶
媒下での網目構造解析

柴山 充弘

東京大学

物性研究所

Structural analysis of lipophilic polyelectrolyte gels in nonpolar solvents

Mitsuhiro Shibayama

The University of
Tokyo

105

スピン誘導型強誘電体における誘電（磁気）ド
メイン駆動

満田 節生

東京理科大学

理学部

Setsuo Mitsuda

Tokyo University of
Science106

Phosphonate 型イオン液体を溶解剤とするセル
ロースの溶存構造

藤井 健太

東京大学

物性研究所

Solution structure of phosphonate-based ionic liquid containing
Kenta Fujii
cellulose

The University of
Tokyo

107

時分割 SANS 測定によるイオン液体中で特有な多分岐高分子のゲル化反応機構

藤井 健太

東京大学

物性研究所

Gelation mechanism of Tetra-PEG ion gel studied by timeresolved small angle neutron scattering

Kenta Fujii

The University of
Tokyo

108

二本鎖アニオン型イオン液体／水二成分混合系で形成する ナノスケール会合体の構造解析

藤井 健太

東京大学

物性研究所

Kenta Fujii

The University ofTokyo

貞包 浩一朗立命館大学

理工学部物理科Surfactant molecules behaving as a surface-inactive agent
学科

Koichiro Sadakane

Ritsumeikan University

貞包 浩一朗立命館大学

理工学部物理科 Novel critical behavior in a mixture of water / organic solvent
under high-pressure condition
学科

Koichiro Sadakane

Ritsumeikan University

111 エポキシ樹脂の重合誘起相分離と架橋構造

金谷 利治

京都大学

化学研究所

Polymerization induced phase separation of epoxy resin andnetwork structure

Toshiji Kanaya

Kyoto University

112 シシケバブ生成における分子量の効果

金谷 利治

京都大学

化学研究所

Effects of molecular weights on shish-kebab formation

Toshiji Kanaya

Kyoto University

高椋 利幸

佐賀大学

大学院工学系研
Stabilization of tertiary structure of lysozyme in aqueous
究科循環物質化
solutions on adding imidazolium-based ionic liquids学専攻

109 界面不活性の働きをする界面活性剤
110

113

高圧条件下における２成分混合溶液の新奇な臨界挙動

イミダゾリウム系イオン液体添加によるリゾチ
ウムの３次構造の安定化

物理Toshiyuki Takamuku Saga University

No．

課題名

氏名

所属

114

含水飽和圧縮モンモリロナイトの原子炉型中性子小角散乱法によるキャラクタリゼーション

高橋 宏明

東北大学

工学研究科

115

結び目を有する環状高分子の溶液中のコンフォ
メーション

高野 敦志

名古屋大学

工学研究科 化学・生物工学専 Chain conformation of knotted ring polymers in solutions.
攻116

超巨大磁気抵抗を示すペロブスカイト型マンガ
ン酸化物における自己相似プロファイルの研究松浦 直人

東海事業センタ
Investigation of power law profile of the ferromagnetic cluster
総合科学研究機ー利用研究促進in perovskite Manganite
構
部

117

リラクサー強誘電体における自己相似プロファ
イルの研究

松浦 直人

Title

Name

Characterization of water-saturated compaced montmorillonites
Hiroaki Takahashi
by reactor type small-angle nutron scattering

Organization
Tohoku University

Atsushi Takano

Nagoya University

Masato Matsuura

CROSS-Tokai

東海事業センタ
総合科学研究機ー利用研究促進 Investigation of self-similar correlations in relaxor ferroelectrics Masato Matsuura
構部

CROSS-Tokai

京都大学

原子炉実験所Investigation of plastic-working-induced deformation of Cu
particle in steel

OBA, Yojiro

Kyoto University

柴山 充弘

東京大学

物性研究所

Thermo-responsive phase behavior of polymer in ionic liquid

Mitsuhiro Shibayama

The University of
Tokyo

大竹

理化学研究所

仁科加速器セン
IRT: ULS (Ultra Small Angle Scattering Instrument)
ター

Yoshie Otake

RIKEN

北口 雅暁

名古屋大学

現象解析研究セ
Study of crystal-diffraction for search of neutron EDM
ンター

Masaaki Kitaguchi

Nagoya University

古坂

道弘

北海道大学

大学院工学研究 IRT: mf-SANS (mini-focusing Small Angle Neutron Scattering
Instrument)
科

Michihiro Furusaka

Hokkaido University

123 iNSE（中性子スピンエコー分光器）IRT 課題

柴山

充弘

東京大学

物性研究所

IRT: iNSE (New issp Neutron Spin Echo Spectrometer)

Mitsuhiro Shibayama

The University ofTokyo

124 イオン液体と界面活性剤の混合物の相分離現象

吉田 亨次

福岡大学

理学部

Phase separation of ionic liquids and surfactant mixtures

Koji Yoshida

Fukuoka University

125 リチウムイオン電解液の構造緩和

吉田 亨次

福岡大学

理学部

Koji Yoshida

Fukuoka University

Youhei Kawabata

Tokyo Metropolitan
University

Youhei Kawabata

Tokyo Metropolitan
University

118 塑性変形による鋼板中 Cu 粒子の変形挙動の解析 大場 洋次郎
119

イオン液体中における刺激応答性高分子の温度
応答性相転移・申請装置 C1-3: ULS
120 ULS（極小角散乱装置）IRT 課題
121

結晶内電場を用いた中性子電気双極子能率探索のための結晶評価

淑恵

・申請装置 C1-3: mf-SANS

ISSP Activity Report 2014

122 C1-3 小型集束型小角散乱装置 IRT 課題
・申請装置 C2-3-1: iNSE

123

126

界面活性剤 2 分子膜のゲル状態での膜面内ダイ
ナミクス

川端 庸平

首都大学東京理工学研究科127

クラフト転移で自発形成するベシクルの臨界ベ
シクル濃度近傍でのダイナミクス

川端 庸平

首都大学東京理工学研究科Dynamics in a gel-like surfactant membrane

124

No．
128

課題名

氏名

crowding 環境下における生体脂質リポソームと
平井 光博
タンパク質の相互作用

ISSP Activity Report 2014

129 界面不活性の働きをする界面活性剤

所属

Title

Name

Organization

Interaction between protein and lipid liposome under crowding
Mituhiro Hirai
environment

Gunma University

群馬大学

理工学研究院（荒牧）

貞包 浩一朗立命館大学

理工学部物理科Surfactant molecules behaving as a surface-inactive agent
学科

Koichiro Sadakane

Ritsumeikan University

・申請装置 C3-1-1: AGNES
130

AGNES（高分解能パルス冷中性子分光器）IRT
課題

山室

修

東京大学

物性研究所

IRT: AGNES (Angle Focusing Cold Neutron Spectrometer)

Osamu Yamamuro

The University of
Tokyo

131

メタノール水溶液における疎水性水和による水分子の拡散遅延効果

丸山 健二

新潟大学

理学部化学科The retardation effect of hydrophobic hydrationon diffusion
dynamics of water molecules in methanol aqueous solution

kenji maruyama

Niigata University132

H2-SF6 ハイドレート中の水素の拡散ダイナミクス

古府 麻衣子

東京大学

物性研究所

Diffusion dynamics of hydrogen molecules in H2-SF6 hydrate

Maiko Kofu

The University ofTokyo

古府 麻衣子

東京大学

物性研究所

Spin dynamics of Zn-Ln-Zn single-molecule magnets

Maiko Kofu

The University of
Tokyo

福岡大学

理学部

Dynamics of water molecule in dioxane-water binary solutions
Toshio Yamaguchi
confined in mesoporous materials

Fukuoka University

133 Zn-Ln-Zn 単分子磁石のスピンダイナミクス
134

メソポーラス物質に閉じ込めたジオキサン−水二山口 敏男
成分溶液中の水分子のダイナミクス

135

山室 修

東京大学

物性研究所

New process of hydrogen diffusion in palladium hydrides

Osamu Yamamuro

The University of
Tokyo

136

山室 修

東京大学

物性研究所

Dynamics of an ionic liquid C16mimPF6 in SmA liquid crystal
and liquid phases

Osamu Yamamuro

The University ofTokyo

部分重水素化試料を用いたシンジオタクチック
137 ポリスチレンの 分子ふるい構造の動的性質に関
する研究

金子 文俊

大阪大学

理学研究科高分 Study on dynamical properties of molecular sieve structure ofsyndiotactic polystyrene using partially deuterated samples
子科学専攻

Fumitoshi Kaneko

Osaka University

138

山室 修

東京大学

物性研究所

Collective dynamics of alkyl-methyl imidaozlium based ionicliquids with liquid crystallline phase

Osamu Yamamuro

The University of
Tokyo

正裕

京都大学

原子炉実験所

IRT: MINE (Multilayer Interferometer and Refrectmeter for
Neutron) 1

Masahiro Hino

Kyoto University

日野 正裕

京都大学

原子炉実験所

Development of 2-dimensional focusing device

Masahiro Hino

Kyoto University

京都大学

原子炉実験所

IRT: MINE (Multilayer Interferometer and Refrectmeter for
Neutron) 2

Masahiro Hino

Kyoto University

・申請装置 C3-1-2: MINE1
139

MINE1（京大炉：多層膜中性子干渉計・反射率計）
日野
IRT 課題140 2 次元中性子集光デバイスの開発
・申請装置 C3-1-2: MINE2
141

MINE2（京大炉：多層膜中性子干渉計・反射率計）
日野
IRT 課題

正裕

No．

課題名

氏名

142

界面相互作用が高分子薄膜内部におけるガラス
転移温度の分布に及ぼす影響

井上 倫太郎

京都大学

北口 雅暁

Name

Organization

化学研究所

Rintaro Inoue

Kyoto University

名古屋大学

現象解析研究セ
Development of optical devices for ultra cold neutrons
ンター

Masaaki Kitaguchi

Nagoya University

平山 朋子

同志社大学

理工学部

Thickness and density of polymer brush layer on metal surface
Tomoko Hirayama
under lubrication measured by neutron reflectometry

Doshisha University

日野 正裕

京都大学

原子炉実験所

Development of 2-dimensional focusing device

Masahiro Hino

Kyoto University

高分子 / 水界面領域におけるタンパク質吸着状態
松野 寿生
に関する研究九州大学

大学院工学研究
Study of adsorbed proteins at the polymer/water interfaces
院応用化学部門

Hisao Matsuno

Kyushu University

田中 敬二

九州大学

大学院工学研究
Aggregation state of interface between polymers and mixed
院 応用化学部
non-solvents
門

Keiji Tanaka

Kyushu University

関 義親

理化学研究所

光量子工学研究
領域

Yoshichika Seki

RIKEN

吉沢

東京大学

物性研究所

IRT: HQR (High Q Resolution Triple Axis Spectrometer)

Hideki Yoshizawa

The University ofTokyo

東京理科大学

理学部物理学科

Uniaxial pressure effect on a parent compound of Fe-based
superconductor FeTe

Taro Nakajima

Tokyo University of
Science

佐藤 卓

東北大学

多元物質科学研
Magnetic structure of MnSb2O6 under external field
究所

Taku J Sato

Tohoku University

143 超冷中性子光学のためのデバイス開発
144

中性子反射率法による潤滑下摩擦低減のための金属基板上ポリマーブラシ層の膜厚・密度測定

145 2 次元中性子集光デバイスの開発
146

147 混合液体と接した高分子界面の凝集状態
148

所属

多層膜冷中性子干渉計による重力起因位相の精
密測定

Title

・申請装置 T1-1: HQR
149 HQR（高分解能中性子散乱装置）IRT 課題
150

英樹

鉄系超伝導体母物質 FeTe のスピン・格子結合に
中島 多朗
対する一軸圧力効果

ISSP Activity Report 2014

151 MnSb2O6 の磁場中磁気構造

125

152

CeTe3 および TbTe3 における量子臨界現象および磁性と超伝導の相関の研究

佐藤 憲昭

名古屋大学

理学研究科物質 Study on the quantum criticality and correlation of magnetism
Noriaki Sato
理学専攻（物理） and superconductivity in CeTe3 and TbTe3

Nagoya University

153

時間分割中性子散乱測定による磁気構造変化過程の実時間追跡元屋 清一郎

東京理科大学

理工学部
学科

Tokyo University of
Science154

スピン格子結合系における磁気相転移と電気分極の一軸応力制御

満田 節生

東京理科大学

理学部

155

空間反転対称性を欠く二次元的系 CeNiC2 の磁気
片野 進
構造

埼玉大学

理工学研究科156 秩序型ペロブスカイト CaCu3Ti4O12 のフォノン 留野 泉

秋田大学

157 混晶系 Ba1-xCaxTiO3 のフォノン

秋田大学

留野 泉

物理 Real-time observation of magnetic structural change by means
Kiyoichiro Motoya
of time-resolved neutron scattering experiments
物理

Uniaxial-stress control of magnetic phase transition andelectric polarization in a spin-lattice coupled system

Setsuo Mitsuda

Tokyo University of
Science

Susumu Katano

Saitama University

Phonons in ordered perovskite CaCu3Ti4O12

Izumi Tomeno

Akita University

Phonons in Ba1-xCaxTiO3

Izumi Tomeno

Akita University

126

No．

課題名

氏名

所属

ISSP Activity Report 2014

158 NdCoO3 の格子ダイナミックス

留野 泉

秋田大学

159 空間反転対称性と磁性

繁岡 透

山口大学

160 EuRu2P2 の磁気構造解析

藤原 哲也

161 EuCo2P2 の磁気構造解析

Title
Lattice dynamics in NdCoO3

Name

Organization

Izumi Tomeno

Akita University

大学院理工学研 Magnetism in non-centrosymmetoric and centrosymmetricsystems
究科

Toru Shigeoka

Yamaguchi University

山口大学

大学院理工学研
Magnetic structure analysis of EuRu2P2
究科

Tetsuya Fujiwara

Yamaguchi University

藤原 哲也

山口大学

大学院理工学研
Magnetic structure analysis of EuCo2P2
究科

Tetsuya Fujiwara

Yamaguchi University
Tohoku university

162

新規スピンラダー系 BiCu2PO6 の磁気相関の研
究

藤田 全基

東北大学

金属材料研究所

Study of magnetic correlations in novel spin-ladder system
BiCu2PO6

Masaki Fujita

163

強誘電体の相転移機構（変位型及び秩序−無秩序重松 宏武型）に関する統一的理解の確立

山口大学

教育学部

Establishment of the unified explanation about the phasetransition mechanism (displacive and order-disorder type) in
Ferroelectrics

Hirotake Shigematsu Yamaguchi University

164

スピンフラストレート系 1147 フェライトの磁気
蒲沢 和也
励起 - 中性子散乱による -総合科学研究機
利用研究促進部
構

Kazuya Kamazawa

CROSS-Tokai

東北大学

Haruhiro Hiraka

KEK

Haruhiro Hiraka

KEK・申請装置 T1-2: AKANE
165

AKANE（東北大金研：三軸型中性子分光器 ）IRT 課題平賀166

遍歴電子反強磁性体 Mn3Si における動的スピン階層構造の研究平賀 晴弘

高エネルギー加 物質構造科学研
速器研究機構究所

167

マルチフェロイック物質 SmMn2O5 の磁気秩序
と強誘電性

木村 宏之

東北大学

多元物質科学研 Antiferromagnetism and ferroelectricity in multiferroic
compounds of SmMn2O5
究所

Hiroyuki Kimura

Tohoku University

168

マルチフェロイック物質 YMn2O5 における磁性と強誘電性の磁性イオン置換効果

木村 宏之

東北大学

多元物質科学研 Substitution effect of magnetic ions on magnetism andferroelectricity in multiferroic YMn2O5
究所

Hiroyuki Kimura

Tohoku University

169

新規 T’ 構造ホールドープ銅酸化物
Pr2-xCaxCuO4 における磁気相関の研究

藤田 全基

東北大学

金属材料研究所

Study of spin correlations in novel T’ -structured cuprate oxide
Masaki Fujita
Pr2-xCaxCuO4

Tohoku university

170

高精度測定による Fe-LSCO の異方的磁気秩序ピ
藤田 全基ークの起源の研究

東北大学

金属材料研究所

Origin of anisotropic magnetic peak in Fe-LSCO studied byhigh resolution neutron-scattering measurement

Masaki Fujita

Tohoku university

青山学院大学

理工学部

Chiral magnetism in MPO4 (M: Transition Metal)

Yusuke Kousaka

Aoyama-Gakuin
University

藤田 全基

東北大学

金属材料研究所

Study of magnetic correlations in novel spin-ladder system
BiCu2PO6

Masaki Fujita

Tohoku university

高阪 勇輔

青山学院大学

理工学部

Chiral magnetic structure in CrX (X=Si, Ge)

Yusuke Kousaka

Aoyama-Gakuin
University

晴弘

171 MPO4 (M: 遷移金属 ) のカイラル磁気構造の検証 高阪 勇輔
172

新規スピンラダー系 BiCu2PO6 の磁気相関の研究173 CrX (Cr=Si, Ge) のカイラル磁気構造の検証

金属材料研究所 IRT: AKANE (Advanced Kinken Neutron Spectrometer)

No．

課題名

174

幾何学的フラストレート系 (Mn,Mg)Cr2O4 におけるらせん磁気構造のクロスオーバー

175 ホールドープ型鉄系超伝導体のスピン揺動

氏名

所属
理工学部

Title
Crossover between conical and screw magnetic phase in(Mn,Mg)Cr2O4

高阪 勇輔

青山学院大学李 哲虎

産業技術総合研 エネルギー技術
Spin fluctuations of hole-doped Fe-based superconductors
究所
研究部門

東北大学

金属材料研究所

大学院理工学研
Crystal structure and ion-diffusion path of layered perovskite究科・物質科学
type oxides
専攻

Name

Organization

Yusuke Kousaka

Aoyama-Gakuin
University

Chul-Ho Lee

National Institute ofAdvanced Industrial
Science and Technology

Kenji Ohoyama

Tohoku University

Masatomo Yashima

Tokyo Institute ofTechnology

・申請装置 T1-3 HERMES176

HERMES（東北大金研：中性子粉末回折装置）
IRT 課題大山177

層状ペロブスカイト型酸化物の結晶構造とイオ
ン拡散経路

八島 正知

東京工業大学八島 正知

東京工業大学

大学院理工学研
Structure-property correlation of visible-light responsive metalMasatomo Yashima
究科・物質科学oxynitride photocatalysts
専攻

Tokyo Institute ofTechnology

東北大学

多元物質科学研 Crystal and magnetic structures of the bilayer triangularantiferromagnet Fe2Ga2S5
究所

Yusuke Nambu

Tohoku University

土井 貴弘

北海道大学

大学院理学研究
院化学部門

Yoshihiro Doi

Hokkaido University

宮崎

若手研究イノベ Clarify of the origin the anomalous low-temperature physical
名古屋工業大学 ータ養成センタ transport behavior in Heusler-type Fe2VAl alloys by neutron
powder diffraction methodー

Hidetoshi Miyazaki

Nagoya Institute ofTechnology

名古屋大学

Ichiro Terasaki

Nagoya University

Osamu Yamamuro

The University ofTokyo

178 可視光応答型酸窒化物光触媒の構造物性
179

二層三角格子反強磁性体 Fe2Ga2S5 の結晶構造と
南部 雄亮
磁気構造

180 希土類ー遷移金属複合酸化物の磁気構造
181

研司

粉末中性子回折を用いたホイスラー化合物
Fe2VAl における 特異な低温物性の起源の解明

182 Sr0.78Y0.22-xLaxCoOy の中性子回折

秀俊

寺崎 一郎

IRT: HERMES(Kinken Powder Diffractometer for High
Efficiency and High Resolution MEasurementS)

Neutron diffraction study on Sr0.78Y0.22-xLaxCoOy

ISSP Activity Report 2014

183

Isotope effect on low-temperature structure of
山室 修
palladium hydrides

東京大学

物性研究所

184

異常高原子価鉄を持つ (Ba,Sr)FeO3 の磁気構造と相境界の解明

山本 隆文

京都大学

工学研究科

手塚 慶太郎

宇都宮大学

工学研究科機能 Crystal structures and magnetic transitions of chromium
complex sulfides
創成研究部門185 クロム複合硫化物の結晶構造と磁気転移

Investigation for magnetic structure and phase boundary of(Ba,Sr)FeO3 with an unusually high valence strate of iron

Takafumi Yamamoto Kyoto University
Keitaro Tezuka

Utsunomiya University

127

186

電子ドープ型マンガン酸化物の磁化の反転と磁
気構造

松川 倫明

岩手大学

工学部

187

新しいタイプの遍歴電子フラストレート磁性体
Fe6W6C, Co6W6C における磁気相関

田畑 吉計

京都大学

大学院工学研究 Spin correlatons in novel itinerant-electron frustrated magnets
Yoshikazu Tabata
Fe6W6C and Co6W6C
科

Kyoto University

188

シャンダイト型遷移金属化合物 Co3(Sn1-xInx)2S2
田畑 吉計の磁気構造解析京都大学

大学院工学研究 Magnetic structure of shandite-type transition-metal compound
Yoshikazu Tabata
Co3(Sn1-xInx)2S2
科

Kyoto University

189

機械的特性に優れた新規磁性化合物 M2AX の磁
気構造解析

京都大学

大学院工学研究 Magnetic structure of novel magnetic compounds withoutstanding mechanical properties M2AX
科

Kyoto University

田畑 吉計

Magnetization reversal and magnetic structure in electron
doped manganites

Michiaki Matsukawa Iwate University

Yoshikazu Tabata

128

No．

課題名

所属

Title

Name

Organization

東京理科大学

理工学部物理学 Magnetic structure of frustrated chain magnetism AM(VO4)(OD) (A=Ca,Sr;M=Co,Ni)
科

Masato Hagihala

Tokyo University of
Science

新規ペロブスカイト関連 AA’ BO4 型構造をもつ
191 混合イオン伝導体の結晶構造とイオン伝導経路 藤井 孝太郎の解明

東京工業大学

理工学研究科物質科学専攻

Kotaro Fujii

Tokyo Institute ofTechnology

192 T’ 構造銅酸化物の超伝導発現と結晶構造の関係

東北大学

金属材料研究所

Masaki Fujita

Tohoku university

工学研究科物質
Investigation of the tetragonal and orthorhombic phase
エネルギー化学
transition of the Nd1-xSrxCoO2 solid solution
専攻

Hiroshi Kageyama

Kyoto University

Hiroshi Kageyama

Kyoto University

Hiroshi Kageyama

Kyoto University

Hiroshi Kageyama

Kyoto University190

一次元フラストレート鎖 AM(VO4)(OD)(A=Ca,Sr;M=Co,Ni) の磁気構造

氏名
萩原 雅人

ISSP Activity Report 2014

藤田 全基

193

固溶系 Nd1-xSrxCoO2 における正方晶−斜方晶転
陰山 洋
移の観察

京都大学

194

新規バナジウム化合物の構造、アニオン拡散、磁
陰山 洋
性の解明

京都大学

195 酸化物格子内での H-/H+ 共存

陰山 洋

京都大学

Relation between superconducting mechanism and crystal
structure in T’ cuprate oxide

工学研究科物質
Investigation of structure, ion diffusion and magnetism in a
エネルギー化学
newly realized vanadate system
専攻
工学研究科物質エネルギー化学 Coexistence of hydride and protons in an oxide lattice
専攻

196

ペロブスカイト型酸窒化物に対する水素化物イ
オン挿入

陰山 洋

京都大学

工学研究科物質エネルギー化学 Hydride insertion into perovskite oxynitrides
専攻197

新規カイラル磁性体 MPO4 (M: 遷移金属 ) の磁
気構造解析

高阪 勇輔

青山学院大学

理工学部

Magnetic structure analysis in new chiral magnetic compounds
Yusuke Kousaka
MPO4 (M: transition metal)

Aoyama-Gakuin
University

198

新規カイラル磁性体 CrX(X: Si, Ge) の磁気構造
解析

高阪 勇輔

青山学院大学

理工学部

Magnetic structure analysis in new chiral magnetic compounds
Yusuke Kousaka
CrX (X: Si, Ge)

Aoyama-Gakuin
University

李 哲虎

産業技術総合研 エネルギー技術 Relationship between crystal structure and superconductivity
in Fe-based superconductors
究所
研究部門

Chul-Ho Lee

National Institute ofAdvanced Industrial
Science and Technology

野村 勝裕

産業技術総合研 ユビキタスエネ Neutron diffraction study of platinum containing perovskite
究所
ルギー研究部門 oxides

Katsuhiro Nomura

National Institute ofAdvanced Industrial
Science and Technology

199 鉄系超伝導体の結晶構造と超伝導の相関200

白金含有ペロブスカイト型酸化物の中性子回折測定

201

中性子散乱による Sr1-xLaxRuO3 のクラスターグ
川崎 郁斗
ラス相の研究理化学研究所

仁科加速器研究
Neutron study of cluster-glass phase in Sr1-xLaxRuO3
センター

Ikuto Kawasaki

RIKEN

202

新規鉄ペロブスカイト酸化物の結晶構造・磁気
構造の決定

山田 幾也

大阪府立大学21 世紀科学研究
Crystal and magnetic structures determination of novel iron機構ナノ科学・材
based perovskite oxides containing unusual high valence ions
料研究センター

Ikuya Yamada

Osaka Prefecture
University

203 正方格子系反強磁性体 A2FeGe2O7 の磁気構造

益田 隆嗣

東京大学

物性研究所

Takatsugu Masuda

The University ofTokyo

204 S=2 籠目格子反強磁性体の磁気構造

田中 秀数

東京工業大学

大学院理工学研
Magnetic structure of the S=2 kagome antiferromagnet
究科

Hidekazu Tanaka

Tokyo Institute ofTechnology

木村 宏之

東北大学

多元物質科学研 IRT: FONDER (Four-circle-Off-center-type Neutron
Diffractometer)
究所

Hiroyuki Kimura

Tohoku University

Magnetic structure of square lattice antiferromagnets
A2FeGe2O7・申請装置 T2-2: FONDER
205 FONDER（中性子 4 軸回折装置）IRT 課題

No．

課題名

206

塑性歪みを加えた Pt3Fe 反強磁性体における強磁性の発現機構

小林 悟

岩手大学

工学部マテリア Mechanism of ferromagnetism in plastically deformed Pt3Fe
antiferromagnet
ル工学科

207

スピン三重項超伝導体 Sr2RuO4 の一軸圧力下中性子散乱実験

山崎 照夫

東京理科大学

理工学部

208

DyFe2Zn20 における異方性変化を伴う逐次磁気
相転移

岩佐 和晃

東北大学

209

マルチフェロイック物質 SmMn2O5 の磁気秩序
と強誘電性

木村 宏之

210

マルチフェロイック物質 YMn2O5 における磁性と強誘電性の磁性イオン置換効果

木村 宏之

211

I 型熱電クラスレートにおける非中心型非調和振金子 耕士
動212 β- パイロクロア超伝導体における非調和振動

氏名

所属

Title

Name

Organization

Satoru Kobayashi

Iwate University

Teruo Yamazaki

Tokyo University of
Science

大学院理学研究 Successive magnetic phase transition accompanying switch inmagnetic anisotropy of DyFe2Zn20
科

Kazuaki Iwasa

Tohoku University

東北大学

多元物質科学研 Antiferromagnetism and ferroelectricity in multiferroic
compounds of SmMn2O5
究所

Hiroyuki Kimura

Tohoku University

東北大学

多元物質科学研 Substitution effect of magnetic ions on magnetism andferroelectricity in multiferroic YMn2O5
究所

Hiroyuki Kimura

Tohoku University

日本原子力研究 量子ビーム応用
Off-center rattling in thermoelectric clathrates
開発機構
研究センター

Koji Kaneko

Japan Atomic Energy
Agency金子 耕士

日本原子力研究 量子ビーム応用
Anharmonic oscillation in β-pyrochlore superconductors
開発機構
研究センター

Koji Kaneko

Japan Atomic Energy
Agency上床

東京大学

Yoshiya Uwatoko

The University ofTokyo

Neutron scattering of the triplet superconductor Sr2RuO4
under uniaxial pressures

・申請装置 Accsessory
213 アクセサリー IRT 課題

美也

物性研究所

IRT: Accsessory

ISSP Activity Report 2014

129

No．

課題名

氏名

所属

Title

Name

Organization

130

平成 26 年度 軌道放射物性研究施設 共同利用課題一覧 / Joint Research List of Syncrotron Radiation Researcher 2014

ISSP Activity Report 2014

No．

課題名

氏名

所属

1

偏光を利用した高輝度軟 X 線実験技術開発の促
進

松田

巌

東京大学

物性研究所

2

省エネ・創エネ・蓄電デバイスのオペランドナ
ノ分光

尾嶋

正治

東京大学

放射光連携研究 Operando nano-spectroscopy for energy efficient, power
generation and energy storage devices
機構

3

大気圧下の角度分解型超高分解能軟Ｘ線発光分光システムの開発

原田

慈久

東京大学

物性研究所

4

モットハバード型強磁性 V 酸化物の時間分解磁気カー効果観測

和達

大樹

東京大学

物性研究所

5

可変偏光顕微高分解能二次元光電子分光による電子レベルの構造物性開拓

大門寛Electronic-level structural materials science by arbitrally奈良先端科学技 凝縮系物性学研
polarized-light high-energy-resolution two-dimensional
術大学院大学究室
microscopic photoelectron spectroscopy

6

チタニア光触媒における励起キャリアダイナミ
クスの時間分解光電子分光法を用いた研究

小澤健一

東京工業大学7

リチウムイオン電池用高電圧正極材料・および
低電圧負極材料のオペランド軟 X 線吸収 / 発光
分光

朝倉

大輔

Operando soft x-ray absorption/emission spectroscopy studies
産業技術総合研 エネルギー技術
of high-voltage cathode materials and low-voltage anode
究所
研究部門
materials for Li-ion batteries8

量子臨界物質 Yb（Al,Fe)B4 の価数揺動状態の軟大川
X 線時間分解光電子分光

万里生

東京理科大学

理学部第一部

9

SrRuO3/SrTiO3 界面における表面光起電力効果の緩和過程の研究

松田

巌

東京大学

10

時間分解軟 X 線光電子分光法を用いた酸化物・金属界面におけるサイト選択的キャリアダイナ
ミクスの解明

山本

達

東京大学

Title

Name

Organization

Iwao Matsuda

The University ofTokyo

Masaharu Oshima

The University ofTokyo

Development of angle resolved ultrahigh resolution soft X-ray
emission spectroscopy in atmospheric pressure

Yoshihisa Harada

The University ofTokyo

Observation of time-resolved magneto-optical Kerr effect in
Mott-Hubbard-type ferromagnetic V oxides

Hiroki Wadachi

The University ofTokyo

Hiroshi Daimon

Nara Instituteof Science andTechnology

Promoting technical development for high brilliant soft X-ray
experiments using light polarization

大学院理工学研
Photoinduced carrier dynamics on titania photocatalyst studied
Kenichi Ozawa
究科 物質科学by time-resolved photoelectron spectroscopy
専攻

Tokyo Institute ofTechnology

Daisuke Asakura

National Institute ofAdvanced Industrial
Science and Technology

Valence fluctuating state in quantum critical Yb(Al,Fe)
B4 studied using soft x-ray time-resolved photoemission
spectroscopy

Mario Okawa

Tokyo University of
Science

物性研究所

Study of temporal relaxation of the photovoltage effect at the
SrRuO3/SrTiO3 interface

Iwao Matsuda

The University of
Tokyo

物性研究所

Site-specific carrier dynamics at the oxide/metal interface
Susumu Yamamotostudied by time-resolved soft x-ray photoelectron spectroscopy

The University of
Tokyo

11

Lighting up the role of the redox-inactive metal M in
[Mn3M(µ4-O)(µ2-O)] mimics of Nature's Mn4O5Ca oxygenevolving complex

Van Schooneveld
Matti

Max Planck Institutefor C-hemical Energy
Conversion

12

Probing by RIXS the nature of low-energy excitations incuprates across the insulator-to-superconductor phaseboundary

Grioni Marco

Ecole Polytechnique
Federale de Lausanne

13

In-situ resonant inelastic x-ray scattering study on the (auto)
reducibility of novel carbon nanotube supported core-shellcobalt-iron fischer-tropsch catalysts

Liu Boyang

Utrecht University

Study of energy loss processes at donor/acceptor interfaces inorganic solar cells

Takeaki Sakurai

University of Tsukuba

Hirokazu Fukidome

Tohoku University

Iwao Matsuda

The University of
Tokyo

14

有機薄膜太陽電池界面のエネルギー損失に関す
る研究

櫻井

岳暁

筑波大学

数理物質系

15

オペランド 3D nano-ESCA を用いた二次元原子薄膜
ヘテロ接合系の観察とデバイス応用 (I) モデル試料：グ 吹留
ラフェンを用いたオペランド顕微分光法の基盤の確立

博一

東北大学

Operando analysis and device applications of hetero大学院工学研究
junctioned 2D atomic layers (I) Establishment of operando
科
spectromicroscopy using graphene as a model system

16

時間分解共鳴磁気光学カー効果による鉄ナノ薄膜内スピン緩和過程の研究

巌

東京大学

物性研究所

松田

Study of spin relaxation process in iron nanofilms by timeresolved resonant magneto-optical Kerr effect

No．

課題名

氏名

所属

RIXS of giant magnetostrictive material, Tb0.3Dy0.7Fe2 inmagnetic field

Name

Organization

Miyawaki Jun

The University of
Tokyo

17

巨大磁歪物質 Tb0.3Dy0.7Fe2 の磁場中 RIXS 測定 宮脇

淳

東京大学

18

リチウムイオン電池用高電圧正極材料・および
低電圧負極材料のオペランド軟 X 線吸収 / 発光
分光 その２

朝倉大輔

Operando soft x-ray absorption/emission spectroscopy studies
産業技術総合研
エネルギー界面of high-voltage cathode materials and low-voltage anode
究所
技術グループmaterials for Li-ion batteries II

Asakura Daisuke

National Institute ofAdvanced Industrial
Science and Technology

19

顕微高分解能二次元光電子分光による遷移金属
化合物の構造物性解析

大門寛

Analysis of structures and electronic states of transition metal
奈良先端科学技 凝縮系物性学研
compounds by microscopic high-resolution two-dimensional
術大学院大学究室
photoelectron spectroscopy

Daimon Hiroshi

Nara Instituteof Science andTechnology

20

光誘起キャリアによる Si(111)-In 吸着表面の金
属 - 絶縁体相転移ダイナミクス

虻川

匡司

東北大学

多元物質科学研 Dynamics of metal-to-insulator phase-transition of Si(111)-in
surface by photo induced carrier
究所

Abukawa Tadashi

Tohoku University21

強磁性 Cr, Fe 酸化物の磁場中軟 X 線共鳴非弾性
藤原
X 線散乱

秀紀

大阪大学

理学系研究科

Magnetic field dependence of SX-RIXS for Cr and Fe based
Ferromagnetic transition metal oxides

Fujiwara Hideki

Osaka Universtiy

22

雰囲気 X 線光電子分光による Cu ステップ表面における CO2 の活性化と水素化の研究

淳

東京大学

物性研究所

Activation and hydrogenation of CO2 on Cu stepped surfaces
Jun Yoshinobu
studied by ambient pressure X-ray photoelectron spectroscopy

The University of
Tokyo

23

Study of temporal relaxation of the photo-Dember effect on a
InN surface

Tang Shu Jung

National Tsing Hua
University (NTHU)

24

Charge injection in prototype solar cells sampled by fast XPS

Flavell Wendy

The University ofManchester

吉信

物性研究所

Title

ISSP Activity Report 2014

131

No．

課題名

氏名

所属

Title

Name

Organization132

平成 26 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 2014
No．

課題名

氏名

所属

Title

Name

Organization

ISSP Activity Report 2014

1. 第一原理計算 / First-Principles Calculation of Materials Properties
1

ハード及びソフトナノ物質の原子構造と電子物性

2Atsushi Oshiyama

The University of
Tokyo

Kenji Shiraishi

Nagoya University

筑波大学大学院数理物質科学研究
Theoretical analyses on hydrolysis mechanism of Nyl C
科

Yasuteru Shigeta

The University of
Tokyo

真司

Development and application of new methods for first東京大学大学院理学系研究科物理principles simulation of material structure and electronic
学専攻
properties

Shinji Tsuneyuki

The University of
Tokyo

柳澤

将

琉球大学理学部物質地球科学科物 Theoretical investigation of spin polarization induced at theorganic-metal interfaces
理系

Susumu Yanagisawa

University of the
Ryukyus

界面における構造、電子状態、および、反応過程の第一原理シミュレーション

森川

良忠

大阪大学 大学院工学研究科 精密 First-principles simulations of atomic geometries, electronic
properties, and chemical reactions at interfaces
科学・応用物理学専攻

Yoshitada Morikawa

Osaka University

7

極限的パルス光と物質の相互作用に対する実時間第一原理計算矢花一浩

筑波大学計算科学研究センター

Kazuhiro Yabana

University of Tsukuba

8

第一原理計算と革新的数理手法に基づく並列化
超大規模電子構造理論

星

Takeo Hoshi

Tottori University

9

ハード及びソフトナノ物質の原子構造と電子物
性

押山

淳

東京大学工学系研究科

Atomic structures and electronic properties of hard- and softnanomaterials

Atsushi Oshiyama

The University of
Tokyo

10

電極電位一定の方法を用いた電気化学反応シミュレーション

大谷実

産業技術総合研究所

Simulation of electrochemical reaction using constantelectrode potential method

Minoru Otani

National Institute ofAdvanced Industrial
Science and Technology

11

有機分子半導体における金属原子の吸着・クラスター化の研究中山隆史

千葉大学理学部物理学科

Adsorption and clustering of metal atoms on organic molecular
Takashi Nakayama
semiconductors

12

不純物ドープ型カーボン系物質の原子構造、安定性と電子構造藤本義隆

東京工業大学大学院理工学研究科 Atomic structures, structural stabilities, and electronic
properties of impurity-doped carbon-based materials
物性物理学専攻

Yoshitaka Fujimoto

Tokyo Institute ofTechnology

13

界面における構造、電子状態、および、反応過程の第一原理シミュレーション

森川

良忠

大阪大学 大学院工学研究科 精密 First-principles emulations of atomic geometries, electronic
properties, and chemical reactions at interfaces
科学・応用物理学専攻

Yoshitada Morikawa

Osaka University

14

ナノスケール炭素物質の物質設計岡田晋

筑波大学大学院数理物質科学研究
Design of nanoscale carbon materials
科

Susumu Okada

University of Tsukuba

15

水素結合型分子性機能物質における重水素効果の理論的解析

立川仁典

横浜市立大学

Masanori Tachikawa

Yokohama Citu
University

押山

東京大学工学系研究科

SiC ベースの次世代パワーデバイスの設計指針の白石
第一原理量子論による獲得

賢二

名古屋大学

3

ナイロン分解酵素 NylC の加水分解反応に関する理論的研究重田育照

4

物質構造・電子状態の新しい第一原理シミュレーション手法の開発と応用

常行

5

有機・金属界面で誘起される磁気分極に関する
理論的研究

6

Atomic structures and electronic properties of hard- and softnanomaterials

淳

健夫

大学院

工学研究科 First principles design of future SiC-based power devices

First-principles calculation of interactions between extreme
pulse light and matter

鳥取大学大学院工学研究科機械宇 Parallelized ultra-large-scale electronic-structure theory basedon first principle calculation and novel numerical method
宙工学専攻

Theoretical analysis of deuterated effect on hydrogen-bonded
molecular materials

Chiba University

No．

課題名

氏名

所属

Title

Name

Organization

Kouji Inagaki

Osaka University

ISSP Activity Report 2014

133

16

第一原理メタダイナミックス計算による CARE
加工プロセスの解明 -GaN,SiC および SiO2 のエ 稲垣
ッチング反応障壁の解析 -耕司

大阪大学大学院工学研究科

17

DFT 自由エネルギー計算手法を用いた電池・触媒界面の酸化還元反応機構解析

館山佳尚

物質・材料研究機構 国際ナノア DFT free energy analysis of redox reaction mechanism atinterfaces in batteries and catalysts
ーキテクトニクス研究拠点

Yoshitaka Tateyama

National Institute forMaterials Science18

DFT 自由エネルギー計算手法を用いた電池・触媒界面の酸化還元反応機構解析

館山佳尚

物質・材料研究機構 国際ナノア DFT free energy analysis of redox reaction mechanism atinterfaces in batteries and catalysts
ーキテクトニクス研究拠点

Yoshitaka Tateyama

National Institute forMaterials Science19

ナイロン分解酵素 NylC の熱耐性の理論解析

重田育照

筑波大学大学院数理物質科学研究
Theoretical studies on heat resistance of Nyl-C
科

Yasuteru Shigeta

University of Tsukuba

20

第一原理メタダイナミックス計算による CARE
加工プロセスの解明 -GaN,SiC および SiO2 のエ 稲垣
ッチング反応障壁の解析 -耕司

大阪大学大学院工学研究科

Kouji Inagaki

Osaka University

21

遷移金属薄膜・有機金属錯体の電子構造と磁性に関する第一原理計算

中村浩次

First principles calculations on electronic structures and三重大学大学院工学研究科物理工magnetism in transition-metal films and organic metal
学専攻
complexes

Kohji Nakamura

Mie University

22

有機半導体薄膜の成長に関する第一原理計算に
よる研究

西館

数芽

岩手大学工学部

Ab-initio study of organic semiconductor thin film growth

Kazume Nishidate

IWATE University

23

外場に応答するナノ構造の励起電子状態と非断熱過程の第一原理計算

渡辺

一之東京理科大学理学部

Ab initio study of excited electronic states and nonadiabatic
processes of nanostructures under external fields

Kazuyuki Watanabe

Tokyo University of
Science24

鉄化合物の磁性と電子状態計算

小畑修二

東京電機大学理工学部

Magnetization and electronic structure calculations of Fe
compounds

Shuji Obata

Tokyo Denki
University25

二次元半導体の欠陥・表面・界面の物性と構造
の解明

影島

博之

島根大学大学院総合理工学研究科

Study on physical and structural properties of defects,
surfaces, and interfaces for 2D semiconductors

Hiroyuki Kageshima

Shimane University

26

酸化物接合によるスピントロニクス磁気異方性
電界効果材料の探索小田竜樹

金沢大学理工研究域数物科学系

Exploratory study on electric field effect of the magnetic
anisotropy in the spintronics material with the oxide layer

Tatsuki Oda

Kanazawa University

27

遷移金属酸化物における磁性・誘電性・トポロ
ジカル性質の電子状態計算

山内邦彦

大阪大学産業科学研究所

Ab-initio study of magnetism, ferroelectricity, and topologicalproperties in transition-metal oxides

Kunihiko Yamauchi

Osaka University

28

遷移金属化合物の第一原理計算

小口

多美夫

大阪大学産業科学研究所

First-principles calculation of transition-metal compounds

Tamio Oguchi

Osaka University29

シリコン表面における金属ナノクラスターの安定性とダイナミクスの密度汎関数理論による研
究

濱田

幾太郎

物質・材料研究機構

Density functional theory study of stability and dynamics ofmetal nanoclusters on a silicon surface

Ikutaro Hamada

National Institute forMaterials Science

30

第一原理計算による二次電池正極材料の充放電
機構解析

籾田

浩義

大阪大学産業科学研究所

First-principles study on charge-discharge reaction mechanism
Hiroyoshi Momida
in cathode materials of secondary batteries

Osaka University31

実空間差分法に基づく大規模第一原理電子状態・小野
輸送特性計算手法の開発とシミュレーション

倫也

筑波大学計算科学研究センター

Development of first-principles electronic-structure andtransport calculation method based on real-space finitedifference approach

Tomoya Ono

University of Tsukuba

32

高圧力下における共有結合性液体の構造と電子状態の第一原理計算

冬樹

熊本大学大学院自然科学研究科

First-principles molecular-dynamics study of structural andelectronic properties of covalent liquids under pressure

Fuyuki Shimojo

Kumamoto University

下條First-principles meta-dynamics analysis in Catalytic Referred
Etching method (reaction barrier in etching of GaN, SiC andSiO2)First-principles meta-dynamics analysis of Catalytic Referred
Etching method (Reaction barrier in etching of GaN, SiC and
SiO2)

134
ISSP Activity Report 2014

No．

課題名

氏名

所属

33

外場に応答するナノ構造の励起電子状態と非断熱過程の第一原理計算

渡辺

一之東京理科大学理学部

Ab initio study of excited electronic states and nonadiabatic
processes of nanostructures under external fields

Kazuyuki Watanabe

Tokyo University of
Science34

水・界面活性剤界面の第一原理 MD シミュレー
ション

大戸

達彦

大阪大学大学院基礎工学研究科

First-principles molecular dynamics simulation of the water/
surfactant interfaces

Tatsuhiko Ohto

Osaka University

35

スピントロニクス材料の原子構造、磁気状態、お小田
よび電子状態の解析

竜樹

金沢大学理工研究域数物科学系

Analyses on atomic structure, magnetism, and electronic
structure in spintronics materials

Tatsuki Oda

Kanazawa University36

固体表面・界面ナノ領域における水素及び酸素
の反応解析

笠井

秀明

大阪大学大学院工学研究科

Analysis of hydrogen and oxygen reactions on solid surface/interface

Hideaki Kasai

Osaka University

37

NdFeB 主相ー副相界面の磁気異方性

合田

義弘

東京工業大学大学院総合理工学研
Interface magnetic anisotropy of NdFeB magnets
究科材料物理科学専攻

Yoshihiro Gohda

Tokyo Institute ofTechnology

38

不純物ドープ型カーボン系物質の原子構造、安定性と電子構造藤本義隆

東京工業大学大学院理工学研究科 Atomic structures, structural stabilities, and electronic
properties of impurity-doped carbon-based materials
物性物理学専攻

Yoshitaka Fujimoto

Tokyo Institute ofTechnology

39

ナノ構造の量子伝導の第一原理計算

小林伸彦

筑波大学 数理物質科学研究科 電First-principles study of quantum transport in nanostructures
子・物理工学専攻

Nobuhiko Kobayashi University of Tsukuba

40

実空間差分法に基づく大規模第一原理電子状態・小野
輸送特性計算手法の開発とシミュレーション

倫也

筑波大学計算科学研究センター

Development of first-principles electronic-structure andtransport calculation method based on real-space finitedifference approach

Tomoya Ono

University of Tsukuba

41

高圧力下における共有結合性液体の構造と電子状態の第一原理計算

下條冬樹

熊本大学大学院自然科学研究科

First-principles molecular-dynamics study of structural andelectronic properties of covalent liquids under pressure

Fuyuki Shimojo

Kumamoto University

42

ナノ構造の電子およびイオン輸送特性の理論解
析

渡邉

聡

東京大学大学院工学系研究科マテ Theoretical analyses on electronic and ionic transport
properties of nanostructures
リアル工学専攻

Satoshi Watanabe

The University of
Tokyo

43

スピントロニクス材料および分子性磁性体の原子構造、磁気状態、電子状態の解析

小田竜樹

金沢大学理工研究域数物科学系

Tatsuki Oda

Kanazawa University

44

ナノ構造の量子伝導の第一原理計算

小林伸彦

筑波大学 数理物質科学研究科 電First-principles study of quantum transport in nanostructures
子・物理工学専攻

45

エネルギー変換過程における基礎過程の研究と高変換効率化に向けた大規模第一原理計算

山下晃一

東京大学大学院工学系研究科

Large scale ab initio calculations on the fundamental processesof energy convergence devices and on their optimization for
Koichi Yamashitahigh conversion efficiency

The University of
Tokyo

46

第一原理及び古典分子動力学計算による固液界面の構造及び電子状態評価福井賢一

大阪大学大学院基礎工学研究科

Structural and electronic properties of solid / liquid interfaces
using first-principles and classical molecular dynamics

Ken-Ichi Fukui

Osaka University47

固体表面・界面ナノ領域における水素及び酸素
の反応解析

笠井

秀明

大阪大学大学院工学研究科

Analysis of hydrogen and oxygen reactions on solid surface/interface

Hideaki Kasai

Osaka University48

ハイブリッド ab initio QM/MM 計算による生体
舘野
高分子の生物機能の解析

賢

兵庫県立大学大学院
究科

Masaru Tateno

University of Hyogo49

SrVO3 および SrRuO3 の第一原理 GW スペクト
ル関数

和磨

九州工業大学

Kazuma Nakamura

Kyushu Institute ofTechnology

中村

Title

Analyses on atomic structure, magnetism, and electronic
structure in spintronics materials and molecular magnets

生命理学研 Hybrid ab initio QM/MM calculations of biologicalmacromolecules
Ab initio GW calculations for SrVO3 and SrRuO3

Name

Organization

Nobuhiko Kobayashi University of Tsukuba

ISSP Activity Report 2014

No．

課題名

氏名

所属

50

次世代メモリ素子に関する第一原理モデリング

洗平

昌晃

名古屋大学大学院工学研究科

First-principles modeling on emerging memory devices

Masaaki Araidai

Graduate School ofEngineering, Nagoya
University

51

全固体電池材料の固体 / 固体界面構造における電
大野
子構造解析

隆央

物質・材料研究機構

Ab initio analysis on solid/solid interfaces for all-solid-statebatteries

Takahisa Ohno

National Institute forMaterials Science52

全電子第一原理 GW+Bethe-Salpeter 法の開発と
野口
応用計算

良史

東京大学物性研究所

All-electron first-principles GW+Bethe-Salpeter method:development and application

Yoshifumi Noguchi

The University of
Tokyo

53

電圧印加密度汎関数計算によるナノキャパシタ
ンス解析

安藤

康伸

東京大学 工学系研究科

Nano-capacitance analysis based on density functional theory
with applied bias

Yasunobu Ando

The University of
Tokyo

54

マルチスケール電気伝導・熱伝導計算

広瀬賢二

物質材料研究機構

Multi-scale electric and thermal transport calculations

Kenji Hirose

National Institute forMaterials Science55

ナノ構造の電子およびイオン輸送特性の理論解
析

渡邉

聡

東京大学大学院工学系研究科マテ Theoretical analyses on electronic and ionic transport
properties of nanostructures
リアル工学専攻

Satoshi Watanabe

The University of
Tokyo

56

遷移金属酸化物界面の第一原理計算石井史之

金沢大学理工研究域数物科学系

57

酸化物界面原子構造及び電子特性

幾原雄一

東京大学大学院工学系研究科総合Atomic Structure and Electronic Property of Oxide Interfaces
研究機構

58

αアルミナ粒界における点欠陥構造の第一原理
計算

桑原

彰秀

ファインセラミックスセンター

59

酸化物電極触媒杉野修

60

遷移金属酸化物へテロ構造・超格子構造超伝導体の軌道純化理論に立脚した物質設計榊原

61

スピントロニクス向け材料の電子物性シミュレ
ーション

62

Title

Name

First-principles calculation of transition metal oxides interfaces Fumiyuki Ishii

Organization

Kanazawa University

135

Yuichi Ikuhara

The University ofTokyoFirst principles calculations of point defects nearby grainboundaries of alpha Al2O3

Akihide Kuwabara

Japan Fine Ceramics
Center

東京大学物性研究所

Oxide electrocatalysts

Osamu Sugino

The University of
Tokyo

寛史

理化学研究所

Theoretical material design of transition metal oxide hetero
structure based on the orbital distillation effect

Hirofumi Sakakibara RIKEN

斎藤峯雄

金沢大学理学部計算科学科

Simulation of electronic properties in materials for spintronics

Mineo Saito

第一原理及び古典分子動力学計算による電解質
溶液 / 電極界面の微視的研究

福井賢一

大阪大学大学院基礎工学研究科

First-principles and classical molecular dynamics investigations
Ken-Ichi Fukui
of electrolyte solution / electrode interfaces

Osaka University

63

半導体格子欠陥の第一原理計算

山内淳

慶應義塾大学理工学部

First-principles study on the defects in semiconductors

Jun Yamauchi

Keio University64

動的電子輸送解析に向けた第一原理計算手法の
開発と応用

江上

喜幸

北海道大学大学院工学研究院

Development and application of first-principles simulator for
dynamics of electron transport

Yoshiyuki Egami

Hokkaido University

65

有機分子会合体や結晶の電子的性質に関する理
論的研究

柳澤

将

琉球大学理学部物質地球科学科物 Theoretical investigation on electronic structures of organic
molecular aggregates and solids
理系

Susumu Yanagisawa

University of the
Ryukyus66

第一原理分子動力学法による X-FEL 照射に伴う分子解離ダイナミクス

大村訓史

広島工業大学

Satoshi Ohmura

Hiroshima Institute ofTechnology

工学部

Ab initio molecular dynamics study of molecular dissociation
by irradiation of X-FEL

Kanazawa University

136
ISSP Activity Report 2014

No．

課題名

氏名

67

第一原理計算による遷移金属酸化物の原子配列構造の解明と磁性の研究

豊田

68

電子デバイスのための自己組織化ナノインター
フェイスの理論

レービガー
ハンネス

横浜国立大学 大学院工学研究院
Theory of self-organized nano-interfaces for electronic devices Hannes Raebiger
物理工学コース69

トレオニン合成酵素の全反応機構の解明

庄司光男

筑波大学数理物質科学研究科

Theoretical elucidation on the full reaction mechanism of
threonine synthase70

多元系カルコパイライト型半導体の格子熱伝導率低下メカニズム解明

泰岡顕治

慶應義塾大学理工学部機械工学科

First principles study on lattice thermal conductivity reduction
Kenji Yasuoka
in multinary chalcopyrite semiconductors

71

第一原理計算を援用した固体表面・界面領域における電子状態と反応解析

國貞雄治

北海道大学大学院工学研究院 附First principles based analysis of electronic structures and属エネルギー・マテリアル融合領
reactions on surfaces/interfaces域研究センター

Yuji Kunisada

Hokkaido University72

有機・金属界面で誘起される磁気分極に関する
理論的研究

柳澤

将

琉球大学理学部物質地球科学科物 Theoretical investigation of spin polarization induced at theorganic-metal interfaces
理系

Susumu Yanagisawa

University of the
Ryukyus73

グラフェンに担持した Pt クラスターに対する
van der Waals 相互作用の第一原理計算

濱本雄治

大阪大学 大学院工学研究科 精密 First principles calculation of van der Waals interaction in Pt
clusters on graphene
科学・応用物理学専攻

Yuji Hamamoto

Osaka University74

磁性電極を架橋する分子の熱電特性の第一原理
計算

大戸

達彦

大阪大学大学院基礎工学研究科

Tatsuhiko Ohto

Osaka University75

グラフェンに担持した Pt クラスターに対する
van der Waals 相互作用の第一原理計算

濱本雄治

大阪大学 大学院工学研究科 精密 First principles calculation of van der Waals interaction in Pt
clusters on graphene
科学・応用物理学専攻

Yuji Hamamoto

Osaka University

76

有機分子会合体や結晶の電子的性質に関する理
論的研究

柳澤

将

琉球大学理学部物質地球科学科物 Theoretical investigation on electronic structures of organic
molecular aggregates and solids
理系

Susumu Yanagisawa

University of the
Ryukyus77

動的電子輸送解析に向けた第一原理計算手法の
開発と応用

江上

喜幸

北海道大学大学院工学研究院

Development and application of first-principles simulator for
dynamics of electron transport

Yoshiyuki Egami

Hokkaido University

78

酸化物トポロジカル絶縁体の第一原理計算石井史之

金沢大学理工研究域数物科学系

First-principles calculation of oxide topological insulators

Fumiyuki Ishii

Kanazawa University

79

スタンナイト Cu2FeSnS4 の相安定性及び欠陥の
泰岡
性質

顕治

慶應義塾大学理工学部機械工学科 Phase stability and defect properties of stannite Cu2FeSnS4

Kenji Yasuoka

Keio University80

磁気物性値とスピン軌道相互作用系の第一原理
計算

三宅

隆

産総研ナノシステム研究部門

81

ハイブリッド ab initio QM/MM 計算による生体
舘野
高分子の生物機能の解析

賢

兵庫県立大学大学院
究科

82

担持金属ナノクラスターの構造と触媒機能

豊浦

和明

83

新たなナノスケール界面の電子物性の探索

小林

功佳

雅之

所属

Title

大阪大学産業科学研究所

First-principles study on magnetism and atomic structures oftransition-metal oxides

Ab initio study of thermoelectric properties of molecules
between magnetic electrodes

Name
Masayuki Toyoda

Mitsuo ShojiFirst-principles approach to magnetic properties and spin-orbit
Takashi Miyake
interaction

生命理学研 Hybrid ab initio QM/MM calculations of biologicalmacromolecules

Organization
Osaka University
Yokohama National
University
University of Tsukuba
Keio University

AIST

Masaru Tateno

University of Hyogo

名古屋大学工学研究科マテリアル Structures and catalytic properties of supported metal
nanoclusters
理工学専攻

Kazuaki Toyoura

Nagoya University

お茶の水女子大学理学部物理学科 Search for electronic properties of new nanoscale interfaces

Katsuyoshi
Kobayashi

Ochanomizu
University

No．

課題名

氏名

所属

Title

Name

Organization

ISSP Activity Report 2014

137

84

Si 表面上の原子吸着系のモデル計算

服部賢

奈良先端科学技術大学院大学物質
Model calculations in Si surfaces with adsorbates
創成科学研究科

Ken Hattori

Nara Instituteof Science andTechnology

85

第一原理計算を援用した固体表面・界面領域における電子状態と反応解析

國貞雄治

北海道大学大学院工学研究院 附First principles based analysis of electronic structures and属エネルギー・マテリアル融合領
reactions on surfaces/interfaces域研究センター

Yuji Kunisada

Hokkaido University86

金属表面の欠陥と有機分子の結合状態

首藤健一

横浜国立大学・工学部

Bonding states of organic molecules adsorbed at defects on
metal surface

Ken-Ichi Shudo

Yokohama Nat’ lUniversity87

全固体電池におけるイオン伝導特性の計算科学
的解析

大野

隆央

物質・材料研究機構

Computational analysis on ionic conduction properties of allsolid-state lithium secondary battery materials

Takahisa Ohno

National Institute forMaterials Science88

無機複合型プロトン電解質の結晶界面におけるイオン伝導度の評価

大友順一郎

東京大学大学院新領域創成科学研 Evaluation of ion conductivity at interfaces in proton
conducting composite electrolyte
究科環境システム学専攻

Junichiro Otomo

The University of
Tokyo

89

第一原理分子動力学による Pt(322) ステップ表面
木崎
における水バイレイヤー中の水の解離

栄年

大阪大学大学院工学研究科

First-principles molecular dynamics simulations on a water
dissociation in water-bi-layer on stepped Pt(322)

Hidetoshi Kizaki

Osaka University

90

照射損傷と格子間原子との相互作用の研究

大澤一人

九州大学応用力学研究所

Study of interaction between radiation damage and interstitial
atom

Kazuhito Ohsawa

Kyushu University

91

第一原理 GW 計算による遷移金属酸化物のプラ
ズマロン状態の解析中村和磨

九州工業大学

Ab initio GW analysis for low-energy plasmaron states oftransition-metal oxides

Kazuma Nakamura

Kyushu Institute ofTechnology

92

スピントロニクス向け材料の電子物性シミュレ
ーション

斎藤

峯雄

金沢大学理学部計算科学科

Simulation of electronic properties in materials for spintronics

Mineo Saito

Kanazawa University

93

希土類磁石材料の電子状態

赤井久純

東京大学物性研究所

Electronic structure of rare earth magnets

Hisazumi Akai

The University of
Tokyo

94

磁性電極を架橋する分子の熱電特性の第一原理
計算

大戸

達彦

大阪大学大学院基礎工学研究科

Ab initio study of thermoelectric properties of molecules
between magnetic electrodes

Tatsuhiko Ohto

Osaka University

95

第一原理 GW 計算によるプラズマロン状態の解
析

中村

和磨

九州工業大学

Ab initio GW analysis for low-energy plasmaron states

Kazuma Nakamura

Kyushu Institute ofTechnology

96

固体電解質におけるイオン伝導現象の第一原理
計算

桑原

彰秀

ファインセラミックスセンターFirst principles calculations of ionic conductivity in solid
electrolytes

Akihide Kuwabara

Japan Fine Ceramics
Center97

無機複合型プロトン電解質の結晶界面におけるイオン伝導度の評価

大友順一郎

東京大学大学院新領域創成科学研 Evaluation of ion conductivity of interfaces in composite-type
proton conducting electrolyte
究科環境システム学専攻

Junichiro Otomo

The University of
Tokyo

98

下部マントル鉱物の格子熱伝導率に対する鉄固溶効果の第一原理計算

出倉春彦

愛媛大学地球深部ダイナミクス研 First-principles calculations of iron solid solution effects on the
Haruhiko Dekura
lattice thermal conductivity of lower mantle minerals
究センター

Ehime University99

固体表面における有機分子の磁性高木紀明

東京大学新領域創成科学研究科物Magnetism of organic molecules on solid surfaces
質系専攻

Noriaki Takagi

The University of
Tokyo

100

セラミックスの粒界における原子配列および電子状態の第一原理計算佐藤幸生

九州大学大学院工学研究院材料工 First-principles calculation of atomic arrangement andelectronic structure in ceramic grain boundaries
学部門

Yukio Sato

Kyushu University

138
ISSP Activity Report 2014

No．

課題名

氏名

所属

101

磁性薄膜におけるノンコリニア磁気構造の第一
原理計算

三浦

良雄

京都工芸繊維大学
科

102

金属酸化物の酸化還元反応における担体効果シ
ミュレーション

大友順一郎

103 高イオン伝導物質の理論的設計

大野

104 低次元ハニカムシートの物性探索
105 超精密ダイヤモンド工具の損耗機構

Title

Name

Organization

Yoshio Miura

Kyoto Institute ofTechnology

東京大学大学院新領域創成科学研 Numerical simulation of metal oxides redox reaction onvarious supports
究科環境システム学専攻

Junichiro Otomo

The University of
Tokyo

隆央

物質・材料研究機構

Theoretical design of the high ionic conductor

Takahisa Ohno

National Institute forMaterials Science高木紀明

東京大学新領域創成科学研究科物Exploring low-dimensional honeycomb sheets
質系専攻

Noriaki Takagi

The University of
Tokyo

宇田

豊

大阪電気通信大学工学部機械工学
Wear mechanism of diamond tool科

Yutaka Uda

Osaka ElectroCommunication
University

工芸科学研究 A first-principles study on noncollinear magnetic structures inmagnetic films

106

磁性薄膜における交換スティフネスの第一原理
計算

三浦

良雄

京都工芸繊維大学
科

工芸科学研究 A first-principles study on exhange stiffness constants inmagnetic films

Yoshio Miura

Kyoto Institute ofTechnology

107

14 族原子によるハニカムシートの構造と電子状
態

高木

紀明

東京大学新領域創成科学研究科物 Geometric and electronic structures of honeycomb sheet
consisting of atoms in 14th group
質系専攻

Noriaki Takagi

The University of
Tokyo

108

金属電極にコンタクトした分子の幾何構造と磁
性

高木

紀明

東京大学新領域創成科学研究科物 Geometric structure and magnetism of molecules connectingwith metal electrode
質系専攻

Noriaki Takagi

The University of
Tokyo

109

液体金属による Al 合金の粒界脆化抑制メカニズ
谷垣ムの第一原理解析

健一

大阪大学大学院基礎工学研究科

First principles analysis for suppression of grain boundary
embrittlement of aluminum alloys by liquid metals

Kenichi Tanigaki

Osaka University

大澤一人

九州大学応用力学研究所

Study of interaction between radiation damage and interstitial
atom

Kazuhito Ohsawa

Kyushu University

内田尚志

北海道科学大学

Theory of magnetic and electronic structure for Mn-basedordered alloys with Cu3Au-type crystal structure

Takashi Uchida

Hokkaido University of
Science112 液体酸素・液体窒素の超高圧構造の解明

大村訓史

広島工業大学Ultrahigh-pressure structures of liquid oxygen and nitrogen

Satoshi Ohmura

Hiroshima Institute ofTechnology

113 層状人工格子界面の電子状態と近接効果平井國友

奈良県立医科大学医学部物理学

Electronic state and proximity effects around interface inlayered superlattices

Kunitomo Hirai

Nara Medical
University

114 超精密ダイヤモンド工具の損耗機構

宇田豊

大阪電気通信大学工学部機械工学
Wear mechanism of diamond tool科

Yutaka Uda

Osaka ElectroCommunication
University

110 照射損傷と格子間原子との相互作用の研究
111

Cu3Au 型結晶構造を持つ Mn 規則合金の磁気構
造と電子状態の理論

工学部

115

Cu3Au 型結晶構造を持つ Mn 規則合金の磁気構
造と電子状態の温度依存性内田尚志

北海道科学大学

Temperature dependence of magnetic and electronic structure
Takashi Uchidafor Mn-based ordered alloys with Cu3Au-type crystal structure

Hokkaido University of
Science116

第一原理計算を用いた希薄窒化物半導体 InSbNのバンド構造に関する研究

藤代博記

東京理科大学

Study of band structure for InSbN based dilute nitride
semiconductor by using first-principle simulation

Hiroki Fujishiro

Tokyo University of
Science117

第一原理計算を用いた遷移金属化合物の物性研
究

榊原

寛史

理化学研究所

Physical analysis of transition metal compounds performing
the first-principles calculation

Hirofumi Sakakibara RIKEN

No．

課題名

氏名

所属

Title

118 第一原理計算による水分解用光触媒材料の解析山田太郎

東京大学大学院工学系研究科化学 Ab-initio DFT calculations of photocatalyst material for water
splitting
システム工学専攻

119 状態選択的化学反応の理解と制御

寺本央

北海道大学電子科学研究所

Understandings and control of state-selective chemical
reactions in terms of dynamical systems theory

Name

Organization

Taro Yamada

The University ofTokyo

Teramoto Hiroshi

Hokkaido University of
Science

Masatoshi Imada

The University ofTokyo

2. 強相関 / Strongly Correlated Quantum Systems
120

スピン軌道相互作用と電子相関の協奏による新奇量子相の数値的研究

今田正俊

東京大学工学系研究科物理工学専 Numerical studies on novel quantum phases induced bycooperative spin-orbit couplings and electron correlations
攻121

強相関電子系の新奇電子状態に関する理論的研
究

松浦

弘泰

東京大学理学研究科物理学専攻

Theoretical study of novel electronic states in strongly
correlated electron systems

Hiroyasu Matsuura

The University of
Tokyo

122

鉄系および銅酸化物高温超伝導体における圧力
効果の研究

黒木

和彦

大阪大学

Study on the pressure effect of iron-based and cuprate
superconductors

Kazuhiko Kuroki

Osaka University

123

パイロクロア格子系における磁気・軌道自由度
による多極子秩序の研究

宇田川

124

数値繰り込み群法による電子・フォノン系の近藤効果の研究堀田

125

ドープされたバンド絶縁体における非従来型超伝導メカニズムに関する研究

126

ISSP Activity Report 2014

東京大学大学院工学系研究科物理 Study of multipolar ordering composed of magnetic and orbital
Masafumi Udagawa
degrees of freedom in pyrochlore lattice systems
工学専攻

The University of
Tokyo

貴嗣

首都大学東京理工学研究科物理学 Study of Kondo effect in electron-phonon systems by numerical
Takashi Hottarenormalization group method
専攻

Tokyo Metropolitan
University

黒木

和彦

大阪大学

Study of superconducting mechanisms in carrier doped band
insulators

Kazuhiko Kuroki

Osaka University

非対称的な斥力相互作用における三成分フェルミ粒子系の超流動安定性古賀昌久

東京工業大学

Stability of the superfluid state in three-component Fermions
with asymmetric repulsive interaction

Akihisa Koga

Tokyo Institute ofTechnology127

スピン軌道相互作用の強い多体電子系における電子の局在と分化の数値的研究

山地洋平

東京大学大学院工学系研究科物理 Numerical studies on localization and fractionalization of
many-body electrons with strong spin-orbit couplings
工学専攻

Youhei Yamaji

The University of
Tokyo

128

連続時間量子モンテカルロ法による多軌道強相
関電子系の研究有田亮太郎

理化学研究所創発物性科学研究セ Study of strongly-correlated multiorbital systems with
continuous-time quantum Monte Carlo method
ンター

Ryotaro Arita

RIKEN Center for
Emergent Materials
Science

129

CaV4O9 型格子上ハバード模型におけるモット転柳移東京理科大学理工学部物理学科

Mott transition in the Hubbard model on the CaV4O9 lattice

Yuki Yanagi

Tokyo University of
Science

Inter site electron correlations in two-dimensional Hubbard
Penrose lattice

Akihisa Koga

Tokyo Institute ofTechnology

Ryotaro Arita

RIKEN Center for
Emergent Materials
Science

将文

有起

139

130 2 次元ペンローズ格子におけるサイト間相関効果 古賀昌久

東京工業大学131 強相関フラーレン系の超伝導の非経験的研究

有田

亮太郎

理化学研究所創発物性科学研究セ Nonempirical study of superconductivity in correlated
fullerenes
ンター

132 内部自由度のある系における超流動安定性古賀昌久

東京工業大学

鉄系超伝導体の類似物質 LaMnAsO, LaMnPO の
三澤
第一原理電子状態計算

貴宏

東京大学大学院工学研究科物理工 Ab initio calculations for Mn analog of iron-based
superconductors LaMnAsO and LaMnPO
学専攻

133

Stability of the superfluid state with internal degree of freedom Akihisa Koga
Takahiro Misawa

Tokyo Institute ofTechnology
The University of
Tokyo

140
ISSP Activity Report 2014

No．

課題名

氏名

134

熱的量子純粋状態の方法を用いた Fermion 系の
数値解析

清水

明

135

非一様系の量子相形成における相関効果の理論
的研究

川上

136

超伝導体および電子・格子系における非平衡相
転移

137

所属

Name

Organization

東京大学総合文化研究科広域科学
Thermal pure quantum state calculus of Fermion systems
専攻相関基礎科学系

Akira Shimizu

The University of
Tokyo

則雄

京都大学大学院理学研究科物理学 Theoretical studies of correlation effects on quantum phaseformation in inhomogeneous systems
宇宙物理学専攻

Norio Kawakami

Kyoto University

青木秀夫

東京大学大学院理学系研究科

Hideo Aoki

The University ofTokyo

強相関電子系のヘテロ接合・超格子構造における量子物性の理論的解析

川上則雄

京都大学大学院理学研究科物理学 Theoretical analysis of quantum properties at heterostructures
Norio Kawakami
and superlattices of strongly correlated systems
宇宙物理学専攻138

正方格子ハバード模型における反強磁性転移近傍の電気伝導の研究佐藤年裕

独立行政法人理化学研究所

Electric transport near the antiferromagnetic transition in asquare-lattice Hubbard model

Toshihiro Sato

RIKEN

139

モンテカルロ法を用いたカイラルらせん磁性体
の研究

星野

晋太郎

東京大学総合文化研究科

Monte Carlo approach to Chiral helimagnets

Shintaro Hoshino

The University of
Tokyo

140

1/5 周期欠損正方格子ハバード模型における反強柳
磁性

東京理科大学理工学部物理学科

Antiferromagnetism in 1/5-depleted square lattice Hubbard
model

Yuki Yanagi

Tokyo University of
Science141

多変数変分モンテカルロ法を用いたホルシュタ
イン・ハバードモデルの研究

大越

Takahiro Ohgoe

The University of
Tokyo

142

ALPS/MPS の開発とその 2 次元格子量子模型へ
の応用

五十嵐

143

鉄系超伝導体における動的スピンゆらぎ増強機
構

伏屋

144

量子モンテカルロ法と第一原理計算による強相
関系の研究

145

量子モンテカルロ法と第一原理計算による強相
関系の研究

有起
孝洋

Title

Non-equilibrium phase transitions in superconductors andelectron-phonon systems

東京大学大学院工学系研究科物理 Multi-variable variational Monte Carlo study of the HolsteinHubbard model
工学専攻

Kyoto University

東京大学物性研究所

Development of ALPS/MPS and its application to 2-dimensional
Ryo Igarashi
quantum lattice system

The University of
Tokyo

雄紀

電気通信大学

Enhancement mechanism of dynamical spin-fluctuation iniron-based superconductors

Yuki Fuseya

University of ElectroCommunications柳沢孝

産業技術総合研究所

Quantum Monte Carlo simulations and electronic statecalculations in correlated electron systems

Takashi Yanagisawa

National Institute ofAdvanced Industrial
Science and Technology

柳沢孝

産業技術総合研究所

Quantum Monte Carlo simulations and first principles
calculations in correlated electron systems

Takashi Yanagisawa

National Institute ofAdvanced Industrial
Science and Technology

146 1 次元量子系における磁束クエンチの数値的研究 押川正毅

東京大学物性研究所

Numerical study of flux quench in one-dimensional quantum
systems

Masaki Oshikawa

The University of
Tokyo

147

多自由度電子系における非平衡ダイナミクスの
研究

石原

純夫

東北大学大学院理学研究科

Study of non-equilibrium states in correlated electron systems
with multi-degrees of freedom

Sumio Ishihara

Department of Physics,
Tohoku University148

動的平均場理論の拡張理論による非従来型超伝
導の研究

大槻

純也

東北大学大学院理学研究科

Investigation of unconventional superconductivities byextension of the dynamical mean-field theory

Junya Otsuki

Tohoku University

149

電子相関系における誘電応答・光応答とそのダ
イナミクス

石原

純夫

東北大学大学院理学研究科

Dielectric and optical responses and dynamics in correlated
electron systems

Sumio Ishihara

Tohoku University

荒川直也

理化学研究所創発物性科学研究セ Microscopic theory for transport phenomena of multi-orbital
strongly correlated electron systems
ンター

Naoya Arakawa

RIKEN

150 多軌道強相関電子系の輸送現象の微視的理論

亮

No．

課題名

151 基板吸着 4He の数値解析

氏名

所属

本山

裕一

東京大学物性研究所

Numerical simulation of 4He adsorbed on substrates

Yuichi Motoyama

The University ofTokyo

Insulating state of multi-orbital electronic system with strong
spin-orbit coupling

Toshihiro Sato

RIKEN

Hiroshi Watanabe

RIKEN Center for
Emergent Matter
Science

Studies on strongly correlated electron systems

Atsushi Yamada

Chiba University152

スピン軌道相互作用が強い多軌道電子系における絶縁相の性質佐藤年裕

独立行政法人理化学研究所

153

バンド間相互作用がもたらすエキシトン凝縮・CDW・超伝導に関する理論的研究

渡部洋

理化学研究所
センター

山田

篤志

千葉大学理学研究科

154 強相関電子系の研究

Title

創発物性科学研究 Theoretical study for exciton condensation, CDW, andsuperconductivity induced by interband interaction

Name

Organization

3. 巨視系の協同現象 / Cooperative Phenomena in Complex, Macroscopic Systems
155

フラストレート磁性体におけるトポロジカル相
転移の研究

毅

東京大学物性研究所

Topological phase transition in the frustrated magnets

Tsuyoshi Okubo

The University of
Tokyo

Parallelization of tensor network methods

Naoki Kawashima

The University ofTokyo

Yasuhiro Hatsugai

University of Tsukuba

大久保

156 テンソルネットワーク法の並列化川島直輝

東京大学物性研究所

157 バルクエッジ対応の数値的研究

初貝安弘

筑波大学大学院数理物質科学研究
Numerical studies of bulk-edge correspondence
科物理学専攻村島隆浩

東北大学大学院理学研究科

Multiscale simulation of polymer melts with element
deformation

Takahiro Murashima Tohoku University

159 フラストレート磁性体における新奇秩序川村光

大阪大学理学研究科

Novel order in frustrated magnets

Hikaru Kawamura

Osaka University

160 フラストレート磁性体における新奇秩序川村光

大阪大学理学研究科

Novel order in frustrated magnets

Hikaru Kawamura

Osaka University

坂井徹

日本原子力研究開発機構量子ビー Ring exchange induced new quantum phases in quantum spin
Toru Sakai
systems
ム応用研究部門

Japan Atomic Energy
Agency162 テンソルネットワーク法の並列化川島直輝

東京大学物性研究所

Parallelization of tensor network methods

The University ofTokyo

163 拡張アンサンブル法による複雑系の研究

岡本祐幸

名古屋大学大学院理学研究科

Study on complex systems by generalized-ensemble algorithms Yuko Okamoto

徹

日本原子力研究開発機構量子ビー
Numerical study on novel phases of the spin nanotubes
ム応用研究部門

158

ISSP Activity Report 2014161

高分子溶融体の要素変形を考慮したマルチスケ
ールシミュレーション

量子スピン系におけるリング交換がもたらす新
しい量子相

141

164

スピンナノチューブの新しい量子相についての
数値的研究

坂井

165

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

166

界面活性剤系のマルチラメラ高次構造形成ダイ
ナミクス

芝

隼人

孝

Naoki Kawashima

Toru Sakai

Nagoya University
Japan Atomic Energy
Agency神戸大学大学院理学研究科

Numerical study of the one-dimensional quantum spin systems
Takashi Tonegawa
with spatial structures

Kobe University

東京大学物性研究所

Dynamics of higher-order structure formation in surfactant
membranes

The University ofTokyo

Hayato Shiba

142
ISSP Activity Report 2014

No．

課題名

氏名

167

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

168

ソフトマター系における流体効果の協同運動に
及ぼす効果

古川

169 相転移現象の新奇機構の開拓

所属

Title

Name

Organization

神戸大学大学院理学研究科

Numerical study of the one-dimensional quantum spin systems
Takashi Tonegawa
with spatial structures

Kobe University

亮

東京大学生産技術研究所

Hydrodynamic effects on the collective dynamics of soft matter
Akira Furukawa
systems

The University of
Tokyo

宮下

精二

東京大学理学系研究科物理学専攻 Explore in new aspects of phase transitions

170 非平衡準安定状態での遅い緩和過程

渕崎員弘

愛媛大学理工学研究科

171 強相関超伝導体における非平衡現象

岡172 有限次元模型のレプリカ対称性の破れの可能性

福島孝治

東京大学大学院総合文化研究科

A possible replica symmetry breaking in finite-dimensional
statistical-mechanics models

希土類金属化合物における磁気秩序と逐次相転
移現象

鈴木

隆史

兵庫県立大学

大学院工学研究科

Succsessive phase transition and magnetic orders in rare-earth
Takafumi Suzuki
metals174 蜂の巣格子磁性体 Na2IrO3 の動的性質鈴木隆史

兵庫県立大学

大学院工学研究科 Dynamical properties of honeybomb lattice magnets

175 有限次元模型のレプリカ対称性の破れの可能性

福島孝治

東京大学大学院総合文化研究科

176 フラストレート磁性体における新奇秩序の探索

大久保

173

蛋白質物性に強く関与するソフトモードの効率的サンプリングシミュレーション

孝

Slow dynamical processes in nonequilibrium metastable states Kazuhiro Fuchizaki

東京大学工学系研究科物理工学専 Theoretical study of non-equilibrium phase transitions instrongly correlated superconductors
攻

隆史

毅

Seiji Miyashita

The University of
Tokyo
Ehime University

Takashi Oka

The University ofTokyo

Koji Hukushima

The University ofTokyo
University of Hyogo

Takafumi Suzuki

University of Hyogo

A possible replica symmetry breaking in finite dimensional
statistical-mechanics models

Koji Hukushima

The University ofTokyo

東京大学物性研究所

Novel phases in frustrated magnets

Tsuyoshi Okubo

The University ofTokyo

Akio Kitao

The University of
Tokyo

北尾

彰朗

東京大学分子細胞生物学研究所

Efficient sampling simulation of the soft modes significantly
contribute to protein properties

178 乱れたトポロジカル絶縁体の相図と臨界現象

大槻東巳

上智大学理工学部

Phase diagram and critical properties of disordered topologicalTomi Ohtsuki
insulators

Sophia University

179 フラストレート磁性体における新奇秩序の探索大久保

東京大学物性研究所

Novel phases in the frustrated magnets

Tsuyoshi Okubo

The University ofTokyo

180 摩擦の物理松川宏

青山学院大学理工学部

Physics of friction

Hiroshi Matsukawa

Aoyama Gakuin
University

181 非平衡準安定状態での遅い緩和過程

渕崎員弘

愛媛大学理工学研究科

Slow dynamical processes in nonequilibrium metastable states Kazuhiro Fuchizaki

Ehime University

中野

博生

兵庫県立大学大学院物質理学研究
Numerical study on low-energy states of quantum spin systems Hiroki Nakano
科University of Hyogo

野口博司

東京大学物性研究所

The University of
Tokyo

177

182

量子スピン系の低エネルギー状態に関する数値的研究

183 生体膜上での膜タンパク質の自己集合

毅Protein self-assembly on biomembranes

Hiroshi Noguchi

No．

課題名

184 量子スピン系の非磁性相に関する数値的研究

氏名

所属

Title

Name

Organization

原田

健自

京都大学大学院情報学研究科

Numerical study of non-magnetic phase in quantum spin
systems

Kenji Harada

Kyoto University

Quantum Monte Carlo study of the edge state of hardcore
bosons on a Kagome lattice

Akiko Masaki-Kato

RIKEN

185

並列化マルチワームアルゴリズムを用いたカゴ
メ格子上ハードコアボゾンのエッジ状態

正木晶子

理化学研究所186

密度行列繰り込み群法によるフラストレートス
ピン梯子系の研究遠山貴己

東京理科大学理学部応用物理学科 DMRG study of a frustrated two-leg spin ladder

Takami Tohyama

Tokyo University of
Science187

量子スピン系における量子相関とトポロジカルな秩序に関する研究藤堂眞治

東京大学大学院理学系研究科物理 Study of quantum correlations and topological order inquantum spin systems
学専攻

Synge Todo

The University of
Tokyo

188

構造ガラスの超大規模シミュレーションによる
静的動的不均一性の探索

芝189

気泡の Ostwald 的成長過程におけるスケーリン
グ解析

渡辺

190

3 次元量子スピン液体の有限温度相転移とその特
求
徴付け

191

スピン秩序構造の異方性と磁気熱量効果の関係
の探索

田村

192

微細横溝加工を施した鉛直平板を流れる凝縮液
膜流の熱輸送特性

193 統計物理学を基盤とした量子情報科学の展開

東京大学物性研究所

Quest for static and dynamical heterogeneities in structural
glass by huge-scale molecular simulation

Hayato Shiba

The University ofTokyo

東京大学物性研究所

Scaling analysis for Ostwald-like ripening of bubbles

Hiroshi Watanabe

The University ofTokyo

東京大学大学院工学系研究科

Finite-temperature phase transitions and their characterization
Yukitoshi Motome
in 3D quantum spin liquids

The University of
Tokyo

亮

国立研究開発法人 物質・材料研
究機構

Study on relation between anisotropic magnetic structure andmagnetocaloric effect

Ryo Tamura

National Institute forMaterials Science足立高弘

秋田大学工学資源学部機械工学科

Heat transfer characteristics of condensate film flow along
vertical plates with microscopic grooves

Takahiro Adachi

Akita University

田中宗早稲田大学 高等研究所

Study on quantum information science based on statisticalphysics

Shu Tanaka

Waseda University

隼人
宙志
幸年

ISSP Activity Report 2014

143

194

フラストレーションのある統計力学模型における相転移の探求田中宗

早稲田大学 高等研究所

Study on phase transition in frustrated spin systems

Shu Tanaka

Waseda University

195

膜タンパクの結合、化学反応による脂質２重膜
の形状変化

野口

博司

東京大学物性研究所

Shape transformation of lipid membranes induced by protein
adsorption and chemical reaction

Hiroshi Noguchi

The University of
Tokyo

196

磁場印加下でのフラストレート磁性体が示す新規機能物性の探索

田村亮

国立研究開発法人 物質・材料研
究機構

Quest for exotic functional properties under magnetic field in
frustrated systems

Ryo Tamura

National Institute forMaterials Science197

微細横溝加工を施した鉛直平板を流れる凝縮液
膜流の熱輸送特性足立高弘

秋田大学工学資源学部機械工学科

Heat transfer characteristics of condensate film flow along
vertical plates with microscopic grooves

Takahiro Adachi

Akita University

198

複雑流体の熱流動に対するマルチスケールシミ
ュレーション安田修悟

兵庫県立大学大学院シミュレーシ Multiscale simulation for non-isothermal flows of complex
fluids
ョン学研究科

Shugo Yasuda

Graduate School of
Simulation Studies

199

ジャンクションレストランジスタにおける不純
物散乱

植田

暁子

筑波大学数理物質系

Impurity scattering in Junctionless transistor

Akiko Ueda

The University of
Tokyo

200

カーネル法による動的スケーリングの改良と非平衡緩和解析への応用

尾関之康

電気通信大学情報理工学研究科

Improvement of dynamical scaling by the use of kernel method
Yukiyasu Ozeki
and its applications to nonequilibrium relaxation analyses

The University
of ElectroCommunications

144

No．

課題名

201

シュウ酸カルシウム一水和物による氷核生成促
進機構の分子動力学シミュレーション研究所属

浩樹

産業技術総合研究所

Molecular dynamics simulation study of mechanism of ice
nucleation promotion by calcium oxalate monohydrate

Hiroki Nada

National Institute ofAdvanced Industrial
Science and Technology

灘

氏名

Title

Name

Organization

ISSP Activity Report 2014古川亮

東京大学生産技術研究所

Rheology of heterogeneous soft matter systems

Akira Furukawa

The University of
Tokyo

溜渕

継博

静岡大学理学部

Development of fast algorythms for sparse Pfaffians and theirapplications to Ising systems

Tsuguhiro
Tamaribuchi

Shizuoka University

204 ナノ構造界面での熱輸送特性の評価

塩見

淳一郎

東京大学工学系研究科

Characterization of thermal transport at nanostructureinterface

Junichiro Shiomi

The University ofTokyo

205 量子スピン系の非磁性相に関する数値的研究

原田健自

京都大学大学院情報学研究科

Numerical study of non-magnetic phase in quantum spin
systems

Kenji Harada

Kyoto University

206 地震の統計モデルの数値シミュレーション

川村

光

大阪大学理学研究科

Numerical simulations on statistical models of earthquakes

Hikaru Kawamura

Osaka University

207 非従来型超伝導体の束縛状態

永井佑紀

日本原子力研究開発機構

Bound states in unconventional superconductors

Yuki Nagai

Japan Atomic Energy
Agency208 地震の統計モデルの数値シミュレーション

川村

光

大阪大学理学研究科

Numerical simulations on statistical models of earthquakes

Hikaru Kawamura

Osaka University

Physical properties of low-dimensional electron systems
created at solid surfaces and their control

Takeshi Inaoka

University of the
Ryukyus

Tokuro Shimokawa

Osaka University

202 不均一ソフトマター系のレオロジー
203

疎 Pfaffian の高速計算アルゴリズムの開発とイジング系への応用

209

固体表面に創成された低次元電子系の物性とそ
の制御

稲岡

毅

琉球大学理学部

210

ハニカム格子磁性体を用いた非自明な磁気現象に関する数値的研究

下川統久朗

大阪大学大学院 理学研究科 宇宙 Numerical study of the novel magnetic phenomenon on thehoneycomb magnetism
地球科学専攻

211

カーネル法による動的スケーリングの改良と非平衡緩和法への応用

尾関之康

電気通信大学情報理工学研究科

Improvement of dynamical scaling by the use of kernel method
Yukiyasu Ozeki
and its applications to nonequilibrium relaxation analyses

The University
of ElectroCommunications

212 ネマチック液晶中の高分子鎖の挙動 II荒木武昭

京都大学大学院理学研究科物理学・宇宙物理学専攻

Conformations of polymer chains in nematic liquid crystals II

Takeaki Araki

Kyoto University

213 ボルツマン液体の基底状態と固化簔口

友紀

東京大学大学院総合文化研究科

The ground state properties of Boltzmann liquid and its
crystallization

Tomoki Minoguchi

The University ofTokyo

Study on X-ray n-beam diffraction and phase problem inprotein crystal structure analysis

Kouhei Okitsu

The University of
Tokyo

214

X 線 n 波回折とタンパク質結晶構造解析における位相問題の研究

沖津康平

東京大学 大学院工学系研究科

215

ハニカム格子磁性体を用いた非自明な磁気現象に関する数値的研究

下川統久朗

大阪大学大学院 理学研究科 宇宙 Numerical study of the novel magnetic phenomenon on thehoneycomb magnetism
地球科学専攻Tokuro Shimokawa

Osaka University

216 クーロングラス系の動的性質

寺尾貴道

岐阜大学工学部

Dynamical properties of Coulomb glass

Takamichi Terao

Gifu University

217 クーロングラス系の動的性質

寺尾貴道

岐阜大学工学部

Dynamical properties of Coulomb glass

Takamichi Terao

Gifu University

No．

課題名

218 グラフェン量子素子デバイスの理論的創成

氏名

所属

草部

浩一

大阪大学大学院基礎工学研究科

Theoretical design of graphene quantum devices

Koichi Kusakabe

Osaka University

Title

Name

Organization219

フラストレート量子スピン鎖の励起ダイナミク
ス

大西

弘明

日本原子力研究開発機構 先端基礎研究センター

Excitation dynamics of frustrated quantum spin chain

Hiroaki Onishi

Japan Atomic Energy
Agency220

エネルギー地形計算によるタンパク質内相互作
用フラストレーションの検出松下勝義

大阪大学 CMC

Detection of frustration of intra-protein interaction based onenergy landscape calculation

Katsuyoshi
Matsushita

Osaka University

221

低レイノルズ非ブラウン粒子懸濁液の吸収状態
転移と粘弾性芝

東京大学物性研究所

Absorbing states and viscoelasticity in low-Re non-Browninan
particle dispersions

Hayato Shiba

The University ofTokyo

222 熱電物質におけるスピン軌道相互作用の効果

隼人

伏屋

雄紀

電気通信大学

Effect of spin-orbit interactions in thermoelectric materials

Yuki Fuseya

University of ElectroCommunications

223

Ｘ線 n 波動力学および運動学理論とその解法の
研究

沖津

康平

東京大学 大学院工学系研究科

Study on X-ray n-beam dynamical and kinematical diffraction
theories and numerical methods to solve them

Kouhei Okitsu

The University of
Tokyo

224

量子スピン系におけるフォノンの効果とフラス
トレーションの関連性

安田千寿

琉球大学理学部

Phonon effects and frustration in quantum spin systems

Chitoshi Yasuda

University of Ryukyus

225

モンテカルロ法による効率的スペクトル解析法の開発と量子スピン系への応用

諏訪秀麿

東京大学大学院理学系研究科物理 Efficient Monte Carlo spectral analysis and application toquantum spin systems
学専攻

Hidemaro Suwa

The University of
Tokyo

226

１次元フラストレート量子スピン系の数値的研
究

飛田

和男

埼玉大学大学院理工学研究科物質 Numerical study of one dimensional frustrated quantum spin
systems
科学部門

Kazuo Hida

Saitama University

産業技術総合研究所

High precision computation of Feigenbaum constant, 2nd.

Masanori Shiro

National Institute ofAdvanced Industrial
Science and Technology

The University ofTokyo

227 Feigenbaum 定数の高精度計算 2

城真範

ISSP Activity Report 2014

145

228

変分モンテカルロ法におけるトポロジカルな量子数射影の開発森田悟史

東京大学物性研究所

Topological quantum-number projection in variational Monte
Carlo method

Satoshi Morita

229

内部自由度を持つ冷却原子気体における熱平衡
状態の普遍性クラス

小林

未知数

京都大学大学院理学研究科

Universality class of thermally equilibrium states for cold
atoms with internal degrees of freedomMichikazu Kobayashi Kyoto University230

非局所動的ＣＰＡ理論に基づく長距離磁気相関の数値的研究梯

琉球大学理学部物理系

Numerical study of long-range magnetic correlations based on
Yoshiro Kakehashi
the nonlocal dynamical CPA

University of Ryukyus

231

シェル・モデルを用いた誘電体の分子動力学シ
ミュレーション

橋本

保

産業技術総合研究所

Molecular dynamics simulation of ferroelectrics using shellmodelsTamotsu Hashimoto

National Institute ofAdvanced Industrial
Science and Technology

232

タンパク質折りたたみエネルギー地形のマルチ
カノニカルサンプリング手法による構成

松下勝義

大阪大学 CMC

Reconstruction of protein folding energy landscape based ona Multicanonical sampling method

Katsuyoshi
Matsushita

Osaka University

233

スピン系の厳密対角化パッケージの並列化と高
精度化

坂下

達哉

東京大学物性研究所

Parallelization and high precision computation of exact
diagonalization package for spin systems

Tatsuya Sakashita

The University of
Tokyo

234

高密剛体球系の非平衡相転移と大規模分子動力学シミュレーション

礒部

雅晴

名古屋工業大学

Nonequilibirum phase transition in the large scale dense hard
sphere molecular dynamics simulation

Masaharu Isobe

Nagoya Institute ofTechnology

祥郎

146
ISSP Activity Report 2014

No．

課題名

氏名

所属

235

量子 Hall 系のスケーリング理論に対する運動量依存摂動の効果の研究

宮田直幸

富山県工業技術センター

Study on effects of momentum-dependent perturbation on thescaling theory of the quantum Hall systems236

多成分剛体球の稠密充填状態の並列 WangLanadu 法による探索

能川知昭

東邦大学医学部

Search of close packing states of multicomponent hard-sphereTomoaki Nogawa
systems by the parallelized Wang-Landau sampling237

両親媒性溶液中におけるミセル形状変化の分子シミュレーション研究藤原進

京都工芸繊維大学大学院工芸科学 Molecular simulation study of Micellar shape change inamphiphilic solution
研究科

238

多成分剛体球の稠密充填状態の並列 WangLanadu 法による探索

能川知昭

東邦大学医学部

Search of close packing states of multicomponent hard-sphereTomoaki Nogawa
systems by the parallelized Wang-Landau sampling

Faculty of Medicine,
Toho University239

カイロペンタゴン格子上量子スピンの磁場中相
転移

礒田

誠

香川大学教育学部

The phase transition under magnetic field of the quantum spin
Makoto Isodaon the Cairo pentagon lattice

Faculty of Education,
Kagawa University

240

スカーミオン構造を持つ磁性体におけるジョセ
フソン効果

横山

毅人

東京工業大学大学院理工学研究科 Josephson effect through magnetic skyrmion

Takehito Yokoyama

Tokyo Institute ofTechnology

241

シリコンナノワイヤにおけるプラズモンの電子輸送への影響植田暁子

筑波大学数理物質系

Effect of plasmon on electron transport in Si nanowires

Akiko Ueda

University of Tsukuba

242

Pruisken スケーリング理論に対する周期磁場の
効果の研究

宮田

直幸

富山県工業技術センター

On effects of periodic magnetic field on the scaling theory of
Pruisken

Naoyuki Miyata

Toyama Industrial
Technology Center

243 決定論的モンテカルロ計算アルゴリズムの解析鈴木秀幸

東京大学大学院情報理工学系研究
Analysis of deterministic Monte Carlo algorithms
科

Hideyuki Suzuki

The University of
Tokyo

Title

Name
Naoyuki Miyata

Susumu Fujiwara

Organization
Toyama Industrial
Technology Center
Faculty of Medicine,
Toho University
Kyoto Instituteof
Technology

No．

課題名

氏名

所属

Title

Name

Organization

平成 26 年度 スーパーコンピュータ CMSI 戦略課題一覧 / CMSI Project List of Supercomputer system 2014

ISSP Activity Report 2014

No．

課題名

氏名

1

分子における電子の動的過程と多体量子動力学

高塚 和夫

東京大学

大学院総合文化 Nonadiabatic electron dynamics and many-body nuclear
dynamics in molecules
研究科

Kazuo Takatsuka

The University of
Tokyo

2

スピン軌道相互作用と電子相関の協奏が生む新
量子相

今田 正俊

東京大学

大学院工学系研 Novel quantum phase induced by synergetic effects of spinMasatoshi Imada
orbit interaction and electron correlation
究科

The University of
Tokyo

3

強相関電子系の励起ダイナミクスの研究

遠山 貴己

東京理科大学

理学部

Study of excitation dynamics in strongly correlated electron
Takami Tohyamasystems

Tokyo University of
Science4

量子モンテカルロ法による新しい量子相・量子臨界現象に関する研究

川島 直輝

東京大学

物性研究所

Monte Carlo study of novel quantum phases and critical
Naoki Kawashima
phenemena

The University of
Tokyo

5

ナノ構造の電子状態から機械的性質までのマルチ
尾形 修司
スケールシミュレーション

名古屋工業大学 工学部

Multi-scale simulation of nano-structured devices fromelectronic structures to mechanical properties

Nagoya Institute ofTechnology6

密度汎関数法によるナノ構造の電子機能予測に関
押山 淳
する研究

東京大学

大学院工学系研 Density functional study on prediction of electronic properties
Atsushi Oshiyama
of nanostructures
究科

The University of
Tokyo

7

新材料探索のための第一原理計算手法開発

常行 真司

東京大学

大学院理学系研 Development of first-principles simulation software for
exploration of new materials
究科

Shinji Tsuneyuki

The University of
Tokyo

8

スピントロニクス / マルチフェロイックスの応用
斎藤 峯雄
へ指向した材料探索

金沢大学

理工研究域

Mineo Saito

Kanazawa University

9

ナノ構造体における光誘起電子ダイナミクスと
光・電子機能性量子デバイスの開発

分子科学研究所

Photo-induced electron dynamics in nanostructures and
理論・計算分子development of quantum devices with optical and electronic
科学研究領域
functionality

Katsuyuki Nobusada

Institute for Molecular
Science10

全原子シミュレーションによるウィルスの分子科
岡崎 進
学の展開

名古屋大学

大学院工学研究
Molecular science of virus by all-atom simulation
科

Susumu Okazaki

Nagoya University

11

太陽電池における光電変換の基礎過程の研究と変山下 晃一
換効率最適化にむけた大規模数値計算

東京大学

Large scale calculations on the fundamental processes of solar
大学院工学系研cells and their optimization in conversion efficiency and long Koichi Yamashita
究科
lifetime

The University of
Tokyo

信定 克幸

所属

Title

Materials design for spintronics/multiferroics applications

Name

Shuji Ogata

Organization

147

12 エネルギー変換の界面科学

杉野 修

東京大学

物性研究所

Interface science on energy conversion

Osamu Sugino

The University ofTokyo

13 バイオマス利用のための酵素反応解析

吉田

九州大学

大学院理学研究
Analysis of enzymatic reaction for biomass energy creation
院

Norio Yoshida

Kyushu University

14 剪断流下の脂質膜系の欠陥ダイナミクスの研究

芝 隼人

東京大学

物性研究所

Study of defect dynamics of surfactant membranes under shear
Hayato Shibaflow

The University ofTokyo

15 フラストレート磁性体の計算科学的研究

中野 博生

兵庫県立大学

大学院物質理学
Computational-science study of frustrated magnets
研究科

東京大学

物性研究所

16

紀生

Screened KKR 法による永久磁石材料の第一原理
土居 抄太郎電子状態計算First-principles electronic structure calculation of permanent
magnets using the screened KKR Green's function method

Hiroki Nakano

University of Hyogo

Shotaro Doi

The University of
Tokyo

148

No．

課題名

氏名

所属

Title

Name

Organization

ISSP Activity Report 201417

フラストレート磁性体におけるトポロジカル励起
大久保 毅
の秩序化

東京大学

物性研究所

18

物質デザインのための確率論的手法に基づく多成立川 仁典
分系量子化学の高度化

横浜市立大学

大学院生命ナノDevelopment of multicomponent quantum chemistry based on
Yokohama City
Masanori Tachikawa
システム科学研
stochastic method for material design
University
究科

Ordering of topological excitations of the frustrated magnets

Tsuyoshi Okubo

The University ofTokyoISSP Activity Report 2014149

Publications
Division of New Materials Science
Takigawa group
We have been performing nuclear magnetic resonance experiments on various quantum spin systems and strongly correlated
electron systems to explore novel quantum phases with exotic ordering and fluctuation phenomena. The major achievements inthe year 2014 include: (1) Investigation by 11B-NMR of the real space imaging of a spin polaron generated by non-magnetic
defects in the Shastry-Sutherland spin system SrCu2(BO3)2, (2) Microscopic examination by angle resolved 27Al-NMR of
the quarupole order and mutipolar fluctuations in PrTi2Al20, (3) Continued investigation on single crystals of volborthite,a frustrated quantum spin system with distorted Kagome lattice aimed at the full understanding of the phase diagram andmagnetic structure in magnetic field.
1.

†*

2.

†

3.

*

4.

†

Field-induced incommensurate phase in the strong-rung spin ladder with ferromagnetic legs: H. Yamaguchi, H.
Miyagai, M. Yoshida, M. Takigawa, K. Iwase, T. Ono, N. Kase, K. Araki, S. Kittaka, T. Sakakibara, T. Shimokawa, T.
Okubo, K. Okunishi, A. Matsuo and Y. Hosokoshi, Phys. Rev. B 89 (2014) 220402(R)(1-7).
Search for a spin-nematic phase in the quasi-one-dimensional frustrated magnet LiCuVO4: N. Büttgen, K. Nawa, T.
Fujita, M. Hagiwara, P. Kuhns, A. Prokofiev, A. P. Reyes, L. E. Svistov, K. Yoshimura and M. Takigawa, Phys. Rev. B
90 (2014) 134401(1-7).
Novel Phase Transitions in the Breathing Pyrochlore Lattice:7Li-NMR on LiInCr4O8 and LiGaCr4O8: Y. Tanaka, M.
Yoshida, M. Takigawa, Y. Okamoto and Z. Hiroi, Phys. Rev. Lett. 113 (2014) 227204(1-5).
Real Space Imaging of Spin Polarons in Zn-Doped SrCu2(BO3)2: M. Yoshida, H. Kobayashi, I. Yamauchi, M.
Takigawa, S. Capponi, D. Poilblanc, F. Mila, K. Kudo, Y. Koike and N. Kobayashi, Phys. Rev. Lett. 114 (2015)056402(1-5).

Sakakibara group
We study magnetism and superconductivity of materials having low characteristic temperatures. These include heavy-electron
systems, quantum spin systems and frustrated spin systems. The followings are some selected achievements in the fiscal year
2014. (1) Field and temperature variations of the specific heat C(H,T) of the heavy fermion superconductor UBe13 (Tc=0.9 K)
were examined at temperatures down to 80 mK. Quite unexpectedly, the magnetic-field dependence of C(H) is linear in H withno angular dependence at low fields in the superconducting state, implying that the gap is fully open over the Fermi surfaces,in stark contrast to the previous expectation. (2) Magnetization and magnetic torque of a high-quality single crystal of Sr2RuO4
have been measured down to 100 mK under a precise control of the magnetic-filed orientation. When the magnetic field isapplied exactly parallel to the ab plane, a sharp magnetization jump at the upper critical field is observed at low temperatures,
evidencing the first-order superconducting-normal transition. A strong magnetic torque appearing when H is slightly tilted awayfrom the ab plane confirms the intrinsic anisotropy Γ = ξa /ξc of as large as 60 even at 100 mK. The present results raises fundamental issues in both the existing spin-triplet and spin-singlet scenarios.
†

1.

Fine-Tuning of Magnetic Interactions in Organic Spin Ladders: H. Yama80guchi, H. Miyagai, T. Shimokawa, K. Iwase,
T. Ono, Y. Kono, N. Kase, K. Araki, S. Kittaka, T. Sakakibara, T. Kawakami, K. Okunishi and Y. Hosokoshi, J. Phys.
Soc. Jpn. 83 (2014) 033707(1-4).

1.

Novel Electronic States of Heavy Fermion Compound YbCo2Zn20: F. Honda, Y. Taga, Y. Hirose, S. Yoshiuchi, Y.
Tomooka, M. Ohya, J. Sakaguchi, T. Takeuchi, R. Settai, Y. Shimura, T. Sakakibara, I. Sheikin, T. Tanaka, Y. Kubo and
Y. Onuki, J. Phys. Soc. Jpn. 83 (2014) 044703(1-9).

2.

†

3.

Thermodynamic Study of Nodal Structure and Multiband Superconductivity of KFe2As2: S. Kittaka, Y. Aoki, N. Kase,
T. Sakakibara, T. Saito, H. Fukazawa, Y. Kohori, K. Kihou, C. Ho Lee, A. Iyo, H. Eisaki, K. Deguchi, N. K. Sato, Y.

Possible Evolution of Antiferromagnetism in Zn-Doped Heavy-Fermion Superconductor CeCoIn5: M. Yokoyama, K.
Fujimura, S. Ishikawa, M. Kimura, T. Hasegawa, I. Kawasaki, K. Tenya, Y. Kono and T. Sakakibara, J. Phys. Soc. Jpn.
83 (2014) 033706(1-5).

* Joint research among groups within ISSP.

150

ISSP Activity Report 2014

Tsutsumi and K. Machida, J. Phys. Soc. Jpn. 83 (2014) 013704(1-4).
4.

†*

5.

Sharp magnetization jump at the first-order superconducting transition in Sr2RuO4: S. Kittaka, A. Kasahara, T. Sakakibara, D. Shibata, S. Yonezawa, Y. Maeno, K. Tenya and K. Machida, Phys. Rev. B 90 (2014) 220502(R) (1-5).

6.

Measurement of the spin-orbit coupling in superconducting Sr2RuO4 using polarized light and spin-resolved photoemission spectroscopy: Evidence for a breakdown in the singlets and triplets pairing mechanisms: C. N. Veenstra, Z. -H.
Zhu, M. Raichle, B. M. Ludbrook, A. Nicolaou, B. Slomski, G. Landolt, S. Kittaka, Y. Maeno, J. H. Dil, I. S. Elfimov,
M. W. Haverkort and A. Damascelli, Phys. Rev. Lett. 112 (2014) 127002(1-4).

7.

Multiband superconductivity with unexpected deficiency of nodal quasiparticles in CeCu2Si2: S. Kittaka, Y. Aoki,
Y. Shimura, T. Sakakibara, S. Seiro, C. Geibel, F. Steglich, H. Ikeda and K. Machida, Phys. Rev. Lett. 112 (2014)
067002(1-5).

8.

Spin-Chirality-Driven Ferroelectricity on a Perfect Triangular Lattice Antiferromagnet: H. Mitamura, R. Watanuki, K.
Kaneko, N. Onozaki, Y. Amou, S. Kittaka, R. Kobayashi, Y. Shimura, I. Yamamoto, K. Suzuki, S. Chi and T. Sakakibara,
Phys. Rev. Lett. 113 (2014) 147202 (1-5).

9.

Anisotropic Superconductivity of the Caged Compound Y5Rh6Sn18 with Unusual Normal-State Electrical Resistivity:
N. Kase, S. Kittaka, T. Sakakibara and J. Akimitsu, JPS Conf. Proc. 3 (2014) 015042 (1-5).

Field-induced incommensurate phase in the strong-rung spin ladder with ferromagnetic legs: H. Yamaguchi, H.
Miyagai, M. Yoshida, M. Takigawa, K. Iwase, T. Ono, N. Kase, K. Araki, S. Kittaka, T. Sakakibara, T. Shimokawa, T.
Okubo, K. Okunishi, A. Matsuo and Y. Hosokoshi, Phys. Rev. B 89 (2014) 220402(R)(1-7).

10. †*Low Temperature Magnetic Properties of Frustrated Quantum Spin Chain System Rb 2Cu2Mo3O12: Y. Yasui, R.
Okazaki, I. Terasaki, M. Hase, M. Hagihala, T. Masuda and T. Sakakibara, JPS Conf. Proc. 3 (2014) 014014 (1-6).
11. Low Temperature Magnetization of Yb2Pt2Pb Along the Hard Magnetization Axis: Y. Shimura, T. Sakakibara, K.
Iwakawa, K. Sugiyama and Y. Onuki, JPS Conf. Proc. 3 (2014) 014029 (1-6).
12. *Magnetization and Specific Heat of the Caged Compound PrV2Al20: K. Araki, Y. Shimura, N. Kase, T. Sakakibara, A.
Sakai and S. Nakatsuji, JPS Conf. Proc. 3 (2014) 011093(1-5).
13. Magnetization Study of the Quantum Critical Behavior of the One Dimensional Spin-1/2 Heisenberg Antiferromagnet
CuPzN: Y. Kono, T. Sakakibara, C. Aoyama, M. M. Turnbull, C. Landee and Y. Takano, JPS Conf. Proc. 3 (2014)
012015 (1-5).
14. †Metal-Insulator Transition in Pyrochlore Oxide (Nd1−xPrx)2Ir2O7 (0.7 ≤x≤ 1): K. Matsuhira, K. Kuroda, T. Sakakibara,
M. Wakeshima and Y. Hinatsu, JPS Conf. Proc. 3 (2014) 013017 (1-6).
15. †Quantum phase near the saturation field in the S=1/2 frustrated spin ladder: H. Yamaguchi, H. Miyagai, Y. Kono, S.
Kittaka, T. Sakakibara, K. Iwase, T. Ono, T. Shimokawa and Y. Hosokoshi, Phys. Rev. B 91 (2015) 125104 (1-5).
16. †S=1/2 ferromagnetic-antiferromagnetic alternating Heisenberg chain in a zinc-verdazyl complex: H. Yamaguchi, Y.
Shinpuku, T. Shimokawa, K. Iwase, T. Ono, Y. Kono, S. Kittaka, T. Sakakibara and Y. Hosokoshi, Phys. Rev. B 91
(2015) 085117 (1-6).
17. Field-Induced Quantum Criticality and Universal Temperature Dependence of the Magnetization of a Spin-1/2 Heisenberg Chain: Y. Kono, T. Sakakibara, C. P. Aoyama, C. Hotta, M. M. Turnbull, C. P. Landee and Y. Takano, Phys. Rev.
Lett. 114 (2015) 037202 (1-5).
18. Field-Orientation Dependence of Low-Energy Quasiparticle Excitations in the Heavy-Electron Superconductor UBe13:
Y. Shimizu, S. Kittaka, T. Sakakibara, Y. Haga, E. Yamamoto, H. Amitsuka, Y. Tsutsumi and K. Machida, Phys. Rev.
Lett. 114 (2015) 147002 (1-5).
19. *Antiferromagnetic transition of the caged compound TmTi2Al20: N. Kase, Y. Shimura, S. Kittaka, T. Sakakibara, S.
Nakatsuji, T. Nakano, N. Takeda and J. Akimitsu, J. Phys.: Conf. Ser. 592 (2015) 012052.

Mori group
We have successfully developed and characterized the functional molecular materials. The major achievements in 2014 are(1) to discover the conductivity and magnetism switching caused by coupled deuterium and electron transfer in the organic
single-component crystal κ-D3(Cat-EDT-TTF)2, (2) to find the solid-solid interconversion with dynamic change of donor
arrangement and electrical properties related to bending of hydrogen-bonded unit for the organic crystal β'-H3(Cat-EDOTTF)2BF4, and (3)to observe the anisotropic transport behavior under uniaxial strain in the pressure indeuced superconductor† Joint research with outside partners.

ISSP Activity Report 2014151

β-(meso-DMBEDT-TTF)2PF6. The introduction of a large variety of molecule degree of freedom to solid promises the development of new trends in functional molecular materials.
1.

Gapless Quantum Spin Liquid in an Organic Spin-1/2 Triangular-Lattice κ-H3(Cat-EDT-TTF)2: T. Isono, H. Kamo, A.
Ueda, K. Takahashi, M. Kimata, H. Tajima, S. Tsuchiya, T. Terashima, S. Uji and H. Mori, Phys. Rev. Lett. 112 (2014)
177201.

2.

A biferrocenium salt containing paramagnetic tetracyanoquinodimethane hexamers: charge disproportionation via
donor–acceptor interactions: T. Mochida, Y. Funasako, K. Takahashi, M. Inokuchi, T. Sakurai, S. Ikeda, H. Ohta, H.
Mori and M. Uruichi, Chem. Commun. 50 (2014) 13370.

3.

Solid-solid phase interconversion in an organic conductor crystal: hydrogen-bond-mediated dynamic changes in
π-stacked molecular arrangement and physical properties: J. Yoshida, A. Ueda, A. Nakao, R. Kumai, H. Nakao, Y.
Murakami and H. Mori, Chem. Commun. 50 (2014) 15557.

4.

Hydrogen-Bond-Dynamics-Based Switching of Conductivity and Magnetism: A Phase Transition Caused by Deuterium and Electron Transfer in a Hydrogen-Bonded Purely Organic Conductor Crystal: A. Ueda, S. Yamada, T. Isono,
H. Kamo, A. Nakao, R. Kumai, H. Nakao, Y. Murakami, K. Yamamoto, Y. Nishio and H. Mori, J. Am. Chem. Soc. 136(2014) 12184.

5.

Protonation of Pyridyl-Substituted TTF Derivatives: Substituent Effects in Solution and in the Proton-Electron Correlated Charge-Transfer Complexes: S. C. Lee, A. Ueda, A. Nakao, R. Kumai, H. Nakao, Y. Murakami and H. Mori,
Chem. Eur. J. 20 (2014) 1909.

6.

Synergistic Spin Transition between Spin Crossover and Spin-Peierls-like Singlet Formation in the Halogen-Bonded
Molecular Hybrid System: [Fe(Iqsal)2][Ni(dmit)2]⋅CH3CN⋅H2O: K. Fukuroi, K. Takahashi, T. Mochida, T. Sakurai, H.
Ohta, T. Yamamoto, Y. Einaga and H. Mori, Angew. Chem. Int. Ed. 53 (2014) 1983.

7.

Uniaxial Strain Effect of the Moderately Dimerized Molecular Conductor β-(meso-DMBEDT-TTF)2PF6: Y. Nishida, T.
Isono, A. Ueda and H. Mori, Eur. J. Inorg. Chem. 2014 (2014) 3845.

8.

Dynamics of Charge Ordering in the Nonlinear Regime of θ-(BEDT-TTF)2CsZn(SCN)4: M. Abdel-Jawad, I. Terasaki, T.
Mori and H. Mori, J. Phys. Soc. Jpn. 84 (2015) 033707.

9.

Phase-change memory function of correlated electrons in organic conductors: H. Oike, F. Kagawa, N. Ogawa, A. Ueda,
H. Mori, M. Kawasaki and Y. Tokura, Phys. Rev. B 91 (2015) 041101.

10. 電子とプロトンが協奏する新しい分子機能性結晶の展開 : 森 初果 , 上田 顕 , 磯野 貴之 , 固体物理 49 (2014) 149-160.

11. 化学の力を生かした新しい分子性機能材料の開発 : 森 初果 , 化学 69、No1 (2014) 20-21.
12. 金属状態を示す純有機単成分導体 : 森 初果 , 工業材料 62

No1 (2014) 26-27.

13. Women in Physics に参加して: 森 初果 , 東京大学理学部ニュース 理学エッセイ No13 (2014) https://www.s.u-tokyo.
ac.jp/ja/s.

Nakatsuji group
Our group explores novel quantum phases and phase transitions in rare-earth and transition metal based compounds. The
followings are some relevant results obtained in 2014. (1) We have succeeded in growing high quality single crystals of
PrV2Al20 and discovered heavy fermion superconductivity due to orbital fluctuations in the antiferro-quadrupolar state. Our
results suggest a proximity to the quadrupolar quantum criticality due to the competition between quadrupolar Kondo effectand multipolar ordering. Indeed, we found that the application of the magnetic field suppresses the quadrupolar transition
and induces a novel type of quantum criticality. Our results indicate that PrTr2Al20 provides a model system to investigate thequantum criticality purely associated with the multipolar (orbital) degrees of freedom. (2) Our high resolution thermodynamic
measurements at very low temperatures on β-YbAlB4 has revealed that two components associated with quantum criticality andheavy fermion behaviour exist in this intermediate valence material. The similar type of heavy fermion component dominatesin the properties of α-analog. Future comparative studies will clarify the origin of the spontaneous quantum criticality of the
β-phase. (3) Finally, the magnetic domain control of antiferromagnetism is an interesting subject for both basic science and theirtechnological application. We found that the magnetic domains in the well-known antiferromagnetic Mott insulator NiS2 may becontrolled by the cooling procedure under magnetic fields. Further investigation such as the magnetoresistance and Hall resistivity would be important to find out useful functions in these non-collinear antiferromagnets.
1.

Electronic Structure of Quantum Spin-liquid Coupound Ba3CuSb2O9: T. Sugimoto, T. Mizokawa, H. Wadati, K. Takubo,
A. Damascelli, T. Z. Regier, G. A. Sawatzky, N. Katayama, H. Sawa, K. Kimura and S. Nakatsuji, J. Phys. Soc. Jpn. 3(2014) 014007 (1-4).
* Joint research among groups within ISSP.

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2.

†*

3.

Sample Dependence of the Quadrupolar Transition in the Nonmagnetic cubic Γ3 Compound PrV2Al20: M. Tsujimoto, A.
Sakai and S. Nakatsuji, J. Phys. Soc. Jpn. 3 (2014) 011066(1-6).

4.

Structural and Magnetic Properties of α-Yb(Al1-xFex)B4 under Hydtostatic Pressure: Y. Sakaguchi, S. Ikeda, K. Kuga, S.
Nakatsuji, N. Hirao, Y. Ohishi and H. Kobayashi, J. Phys. Soc. Jpn. 3 (2014) 011059 (1-6).

5.

Superconducting properties of the ferroquadrupolar cubic Γ3 compound PrTi2Al20: A. Sakai, K. Kuga and S. Nakatsuji,
J. Phys. Soc. Jpn. 3 (2014) 011066 (1-6).

6.

Suppression of the Heavy Fermion State in Magnetic Fields in the Mixed Valent α-YbAlB4: Y. Matsumoto, K. Kentaro
and S. Nakatsuji, J. Phys. Soc. Jpn. 3 (2014) 011076(1-5).

7.

Two magnetic phases in α-YbAl1-xFexB4: K. Kuga, S. Suzuki and S. Nakatsuji, J. Phys. Soc. Jpn. 3 (2014) 012013(14).

8.

CeCu2Ge2 : Challenging our understanding of quantum criticality: B. Zeng, Q. R. Zhang, D. Rhodes, Y. Shimura, D.
Watanabe, R. E. Baumbach, P. Schlottmann, T. Ebihara and L. Balicas, Phys. Rev. B 90 (2014) 155101.

9.

Experimental realization of a quantum breathing pyrochlore antiferromagnet: K. Kimura, S. Nakatsuji and T. Kimura,Phys. Rev. B 90 (2014) 060414.

Heavy fermion superconductivity under pressure in the quadrupole system PrTi2Al20: K. Matsubayashi, T. Tanaka, J.
Suzuki, A. Sakai, S. Nakatsuji, K. Kitagawa, Y. Kubo and Y. Uwatoko, J. Phys. Soc. Jpn. 3 (2014) 011077 (1-5).

10. Heavy-Fermion Superconductivity in the Quadrupole Ordered State of PrV2Al20: M. Tsujimoto, Y. Matsumoto, T.
Tomita, A. Sakai and S. Nakatsuji, Phys. Rev. Lett. 113 (2014) 267001 (1-5).
11. 銅酸化物磁性体におけるスピン・軌道の特異な量子状態 : 澤 博 , 中辻 知 , 固体物理 49 (2014) 533-543.
12. Quantum criticality in a metallic spin liquid: Y. Tokiwa, J. J. Ishikawa, S. Nakatsuji and P. Gegenwart, Nature Mater. 13(2014) 356-359.
13. X-ray Photoemission and X-ray Absorption Spectroscopy of Hexagonal Ba3CuSb2O9: T. Sugimoto, T. Mizokawa, H.
Wadati, K. Takubo, A. Damascelli, T. Z. Regier, G. A. Sawatzky, N. Katayama, H. Sawa, K. Kimura and S. Nakatsuji, J.
Phys. Soc. Jpn 63 (2014) 549-550.
14. Magnetic and Thermal Properties of the Single Crystalline Pr2Zr2O7 in a [111] field: K. Kimura and S. Nakatsuji, JPS
Conf. Proc. 3 (2014) 014027[5 pages].
15. *Magnetization and Specific Heat of the Caged Compound PrV2Al20: K. Araki, Y. Shimura, N. Kase, T. Sakakibara, A.
Sakai and S. Nakatsuji, JPS Conf. Proc. 3 (2014) 011093(1-5).
16. *Magnetization of Yb-based mixed-valent compounds at megagauss fields: T. Terashima, Y. H. Matsuda, K. Kuga, Y.
Matsumoto and S. Nakatsuji, J. Phys. Conf. Proc. 3 (2014) 011027(1-5).
17. Conduction electron spin resonance in the α-Yb1-xFexAlB4 (0 ≤ x ≤ 0.50) and α-LuAlB4 compounds: L. Holanda, G.
Lesseux, E. Magnavita, R. Ribeiro, S. Nakatsuji, K. Kuga, Z. Fisk, S. Oseroff, R. Urbano, C. Rettori and P. Pagliuso, J.
Phys.: Condens. Matter 27 (2015) 255601/1-5.
18. Field Evolution of Quantum Critical and Heavy Fermi-Liquid Components in the Magnetization of the Mixed Valence
Compound β-YbAlB 4: Y. Matsumoto, K. Kuga, Y. Karaki, Y. Shimura, T. Sakakibara, M. Tokunaga, K. Kindo and S.
Nakatsuji, J. Phys. Soc. Jpn. 84 (2015) 024710(1-7).
19. Magnetization Anomaly due to the Non-Coplanar Spin Structure in NiS 2: T. Higo and S. Nakatsuji, J. Phys. Soc. Jpn.
84 (2015) 053702(1-5).
20. Field-induced quadrupolar quantum criticality in PrV2 Al20: Y. Shimura, M. Tsujimoto, B. Zeng, L. Balicas, A. Sakaiand S. Nakatsuji, Phys. Rev. B 91 (2015) 241102/1-5.
21. 電子軌道の量子ゆらぎによる新しい超伝導 : 松本 洋介 , パリティ 30-7 (2015) (2-6).
22. Anisotropic transverse magnetoresistivity in α-YbAlB 4: Y. Matsumoto, J. Hong, K. Kuga and S. Nakatsuji, J. Phys.:Conf. Ser. 592 (2015) 012086.
23. Anomalous Enhancement of Seebeck Coefficient in Pr-Based 1-2-20 System with Non-Kramers Doublet Ground States:
Y. Machida, T. Yoshida, T. Ikeura, K. Izawa, A. Nakama, R. Higashinaka, Y. Aoki, H. Sato, A. Sakai, S. Nakatsuji, N.
Nagasawa, K. Matsumoto, T. Onimaru and T. Takabatake, J. Phys.: Conf. Ser. 592 (2015) 012025.

† Joint research with outside partners.

ISSP Activity Report 2014153

24. Anomalous specific heat behaviour in the quadrupolar Kondo system PrV 2 Al 20: M. Tsujimoto, Y. Matsumoto and S.
Nakatsuji, J. Phys.: Conf. Ser. 592 (2015) 012023.
25. *Antiferromagnetic transition of the caged compound TmTi2Al20: N. Kase, Y. Shimura, S. Kittaka, T. Sakakibara, S.
Nakatsuji, T. Nakano, N. Takeda and J. Akimitsu, J. Phys.: Conf. Ser. 592 (2015) 012052.
26. *High Pressure Measurements of the Resistivity of β -YbAlB 4: T. Tomita, K. Kuga, Y. Uwatoko and S. Nakatsuji, J.
Phys.: Conf. Ser. 592 (2015) 012019.
27. Shubnikov-de Haas Oscillation in the cubic Γ3-based heavy fermion superconductor PrV2Al20: Y. Shimura, M. Tsujimoto, A. Sakai, B. Zeng, L. Balicas and S. Nakatsuji, J. Phys.: Conf. Ser. 592 (2015) 012026.
28. †*Synchrotron X-ray spectroscopy study on the valence state and magnetization in α-YbAl 1-x Fe x B 4 (x = 0.115) at
low temperatures and high magnetic fields: T. Terashima, Y. H. Matsuda, K. Kuga, S. Suzuki, Y. Matsumoto, S. Nakatsuji, A. Kondo, K. Kindo, N. Kawamura, M. Mizumaki and T. Inami, J. Phys.: Conf. Ser. 592 (2015) 012020 (6 pages).
29. High-Field Multi-Frequency ESR in the Rare-Earth Spinel Compound CdYb2S4: D. Yoshizawa, T. Kida, S. Nakatsuji,
K. Iritani, M. Halim, T. Takeuchi and M. Hagiwara, Appl. Magn. Reson. NIL (2015) 0937-9347.
30. Absence of Jahn-Teller transition in the hexagonal Ba3CuSb2O9 single crystal: N. Katayama, K. Kimura, Y. Han, J.
Nasu, N. Drichko, Y. Nakanishi, M. Halim, Y. Ishiguro, R. Satake, E. Nishibori, M. Yoshizawa, T. Nakano, Y. Nozue, Y.
Wakabayashi, S. Ishihara, M. Hagiwara, H. Sawa and S. Nakatsuji, Proceedings of the National Academy of Sciences(2015), in print.

Division of Condensed Matter Theory
K. Ueda group
Metal-insulator (MI) transition is one of the most intriguing phenomena of the strongly correlated electron systems. Nature of
the MI transitions depends on lattice structure even if the orbital degeneracy is not taken into account. We investigate the MI
transitions of the Hubbard model on the one-fifth-depleted square lattice by using the cellular dynamical mean field theory,
assuming paramagnetic phases. It is shown that the MI transition is of the first order on the plaquette side of the parameter
space, while it is continuous on the dimer side. The continuous MI transition is a Lifshitz transition driven by the electronelectron interaction.
1.

Continuous Mott transition in a two-dimensional Hubbard model: Y. Yanagi and K. Ueda, Phys. Rev. B 90 (2014)
085113.

2.

Magnetic Phases and Edge States of the 1/5-Depleted Square-Lattice Hubbard Model at 1/4 Filling: Y. Yamashita, M.
Tomura, Y. Yanagi and K. Ueda, JPS Conf. Proc 3 (2014) 016012.

3.

Quantum Phase Transition in the 1/5 Depleted Square Lattice Hubbard Model: Y. Yanagi and K. Ueda, JPS Conf. Proc 3(2014) 013005.

Takada group
Employing several techniques including the Green's-function approach, quantum Monte Carlo simulations, and several types ofvariational approaches, we are studying various aspects of quantum many-body problems in condensed matter physics, based
mainly on the first-principles Hamiltonian. This year we have obtained a couple of outstanding results: (1) We have revealed
that the system of a proton embedded in the electron gas with the density parameter rs in the region between 2 and 12.5 yields
a Kondo spin-singlet resonance state with the Kondo temperature TK well beyond 1,000K as its ground state, indicating that if
a macroscopic number of protons are embedded in a regular array into a metal in this density region to form a periodic Kondo
lattice, superconductivity is expected to occur at a temperature as high as TK/10 by referring to heavy-fermion physics. (2) In
the electron gas with the density as low as rs~20, a new phase transition is found to occur as signaled by the anomalous behavior
in the momentum distribution function, along with the unusual property of vanishing effective mass at the Fermi level m*~0,
leading to a new filed of “light-fermion physics”.
1.

Structural evolution of the one-dimensional spectral function from the low- to the high-energy limit: H. Maebashi and Y.
Takada, Phys. Rev. B 89 (2014) 201109(R) (1-5).

2.

Generic Features of an Electron Injected into the Luttinger Liquid: H. Maebashi and Y. Takada, J Supercond Nov Magn

* Joint research among groups within ISSP.

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28 (2015) 1331-1335.
3.

第１原理からの超伝導理論 : 高田 康民 , 物性研究 電子版 Vol.3, No.1 (2014) 031203(1-29).

4.

Theory for Reliable First-Principles Prediction of the Superconducting Transition Temperature: Y. Takada, in: Carbonbased New Superconductors: Toward high-Tc superconductivity (ISBN 978-981-4303-30-9 (Hardcover), 978-981-430331-6 (eBook)), Ch 8, edited by J. Haruyama, (Pan Stanford Publishing Pte. Ltd., 2015), pp. 193-230.

5.

Theory of Superconductivity in Graphite Intercalation Compounds: Y. Takada, in: Materials Science and Materials
Engineering, edited by S. Mahfoudh and M. Nicholls, (Elsevier, 2015), in print.

Oshikawa group
We studied a wide range of fundamental problems in condensed matter theory and statistical mechanics. In particular, westudied the total orbital angular momentum of chiral superfluids. Superfluids/superconductors with vanishing viscosity or resistivity often arise as a result of condensation of pairs of the constituent fermions. Usually, each pair does not involve a circularmotion and has zero angular momentum. However, in the superfluid-A phase of liquid Helium-3, for example, each pair isrotating in a particular orientation around its center. We may then expect that the superfluid carries a total angular momentum,
i.e. is rotating as a whole. There have been, however, conflicting arguments, and the problem has remained unresolved for morethan 30 years. We studied this long-standing question carefully, to find a rather surprising answer: the superfluid indeed has alarge total angular momentum, only if each pair has the minimal angular momentum 1. When each pair carries a higher angularmomentum (2, 3, 4, ...), the total angular momentum almost vanishes. This counter-intuitive phenomenon is a consequence ofsubtle quantum mechanical nature of the superfluids.
1.

†

2.

†

3.

Beats and expansion of two-component Bose–Einstein condensates in the Thomas–Fermi limit: J. Q. Quach, J. Phys. B:
At. Mol. Opt. Phys. 47 (2014) 215007.

4.

†

5.

Distinct Trivial Phases Protected by a Point-Group Symmetry in Quantum Spin Chains: Y. Fuji, F. Pollmann and M.
Oshikawa, Phys. Rev. Lett. 114 (2015) 177204.

6.

Gravitational Casimir Effect: J. Q. Quach, Phys. Rev. Lett. 114 (2015) 081104 (1-5).

7.

†

Quantum criticality in an asymmetric three-leg spin tube: A strong rung-coupling perspective: Y. Fuji, S. Nishimoto, H.
Nakada and M. Oshikawa, Phys. Rev. B 89 (2014) 054425 (1-13).
Valence bond distribution and correlation in bipartite Heisenberg antiferromagnets: D. Schwandt, F. Alet and M.
Oshikawa, Phys. Rev. B 89 (2014) 104416 (1-14).

Selection of factorizable ground state in a frustrated spin tube: Order by disorder and hidden ferromagnetism: X. Plat,
Y. Fuji, S. Capponi and P. Pujol, Phys. Rev. B 91 (2015) 064411 (1-21).

Orbital Angular Momentum and Spectral Flow in Two-Dimensional Chiral Superfluids: Y. Tada, W. Nie and M.
Oshikawa, Phys. Rev. Lett. 114 (2015) 195301.

8. 「物性物理学」～物質に潜む普遍的概念～ : 押川 正毅 , 数理科学 620 (2015) 40-45.
9.

†Absence of Quantum Time Crystals: H. Watanabe and M. Oshikawa, Phys. Rev. Lett. (2015), accepted for publication.

10. † ウラン系強磁性超伝導における強磁性ゆらぎが誘起するスピン三重項超伝導 : 石田 憲二 , 服部 泰佑 , 佐藤 憲昭 , 出口
和彦 , 多田 靖啓 , 藤本 聡 , 固体物理 50 (2015) 123-132.

Tsunetsugu group
We have studied an unidentified phase transition observed in the heavy fermion compound PrIr2Zn20. Each Pr ion has two
f-orbital electrons, and its local ground state is a non-Kramers doublet. We investigated how this degeneracy is lifted due tointeractions between neighbor sites. We have performed a detailed analysis of mean-field approximation and phenomenologicalapproach and determined the phase diagram upon controlling temperature and magnetic field. At low temperature, electric
quadrupoles show a few types of antiferro orders, and the phase diagram is particularly rich when magnetic field is appliedalong (1,0,0) direction. An important finding is that the antiferro quadrupole order at zero magnetic field is accompanied by aweak ferro order, which is the secondary order parameter induced due to quadrupole anisotropy. Our calculation demonstrates
that the induced ferro component also exhibits singular behaviors below the transition temperature, and this would explain theanomaly observed in ultrasound experiments. We have also investigated dynamics near the Mott metal-insulator transition.
Using the cluster dynamical mean-field theory, we calculated dynamical correlations between doublon and holon, and demonstrated different behaviors between the metallic and insulating phases.

† Joint research with outside partners.

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155

1.

Antiferro Quadrupole Orders in Non-Kramers Doublet Systems: K. Hattori and H. Tsunetsugu, J. Phys. Soc. Jpn. 83(2014) 034709 (19 pages).

2.

Doublon dynamics of the Hubbard model on a triangular lattice: T. Sato and H. Tsunetsugu, Phys. Rev. B 90 (2014)
115114.

3.

Quantum impurity in a Tomonaga-Luttinger liquid: Continuous-time quantum Monte Carlo approach: K. Hattori and A.
Rosch, Phys. Rev. B 90 (2014) 115103.

Kohmoto group
Energy versus magnetic field (Hofstadter butterfly diagram) in twisted bilayer graphene is studied theoretically. If we take theusual Landau gauge, we cannot take a finite periodicity even when the magnetic flux through a supercell is a rational number.
We show that the periodic Landau gauge, which has the periodicity in one direction, makes it possible to obtain the Hofstadterbutterfly diagram. Since a supercell can be large, magnetic flux through a supercell normalized by the flux quantum can be afractional number with a small denominator, even when a magnetic field is not extremely strong. As a result, quantized Hall
conductance can be a solution of the Diophantine equation which cannot be obtained by the approximation of the linearizedenergy dispersion near the Dirac points.

Sugino group
In this fiscal year, we have studied the electrode-solution interface using the density functional theory (DFT) and the excitedstates of molecules using the time-dependent DFT and the two-particle Green's function method. In the former research, we
focused on Pt(111)/solution interface and studies hydrogen distribution, the solvent fluctuation effect, and the oxygen reduction reaction. In the latter research, we studied the non-adiabatic effect, and in addition, started study on the firefly luciferin in
collaboration with Akiyama group. The tensor-decomposition approach to very accurate first-principles calculation was also
intensively studied.
1.

†

2.

†*

3.

†

4.

†

5.

First-principles thermodynamic description of hydrogen electroadsorption on the Pt(111) surface: T. T. T. Hanh, Y.
Takimoto and O. Sugino, Surf. Sci. 625 (2014) 104.

6.

†

7.

All-electron GW+Bethe-Salpeter calculations on small molecules: D. Hirose, Y. Noguchi and O. Sugino, Phys. Rev. B
91 (2015) 205111.

8.

Symmetry breaking and excitonic effects on optical properties of defective nanographenes: Y. Noguchi and O. Sugino, J.
Chem. Phys. 142 (2015) 064313.

9.

†

Effect of thermal motion on catalytic activity of nanoparticles in polar solvent: N. Bonnet, O. Sugino and M. Otani, J.
Chem. Phys. 140 (2014) 044703.
First-Principles Investigation on Rydberg excitations of Firefly Luciferin Anion in Vacuum: Y. Noguchi, M. Hiyama,
H. Akiyama and N. Koga, J. Chem. Phys. 141 (2014) 044309.
Performance of Tamm-Dancoff approximation on nonadiabatic couplings by time-dependent density functional theory:
C. Hu, O. Sugino and K. Watanabe, J. Chem. Phys. 140 (2014) 054106.
Exceptionally long-ranged lattice relaxation in oxygen-deficient Ta2O5: Y. Yang, O. Sugino and Y. Kawazoe, Solid
State Communications 195 (2014) 16.

Self-Poisoning Dynamical Effects in the Oxygen Reduction Reaction on Pt(111) from a Top-Down Kinetic Analysis:
N. Bonnet, M. Otani and O. Sugino, J. Phys. Chem. C 118 (2014) 13638.

TOMBO: All-electron mixed-basis approach to condensed matter physics: S. Ono, Y. Noguchi, R. Sahara, Y. Kawazoe
and K. Ohno, Computer Physics Communications 189 (2015) 20.

10. *First-Principles Investigation of Strong Excitonic Effects in Oxygen 1s X-ray Absorption Spectra: Y. Noguchi, M.
Hiyama, H. Akiyama, Y. Harada and N. Koga, J. Chem. Theory Comput. 11 (2015) 1668-1673.
11. *Vibronic Structures in Absorption and Fluorescence Spectra of Firefly Oxyluciferin in Aqueous Solutions: M. Hiyama,
Y. Noguchi, H. Akiyama, K. Yamada and N. Koga, Photochem Photobiol (2015) published online, in print.
12. Configuration interaction with antisymmetrized geminal powers: W. Uemura, S. Kasamatsu and O. Sugino, Phys. Rev.
A (2015), accepted for publication.

* Joint research among groups within ISSP.

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ISSP Activity Report 2014

Kato group
The main research subject of our laboratory is theory of nonequilibrium properties in nanoscale devices. We have performed(1) research on exact solutions for a multiorbital Anderson impurity at high bias voltages and (2) calculation of photon-assisted
current noises under strong AC fields in quantum dot systems. We have also evaluated rare transition rates in evolutionary gametheory in semiclassical analysis based on the path-integral formalism.
1.

Dephasing in single-electron generation due to environmental noise probed by Hong-Ou-Mandel interferometry: E.
Iyoda, T. Kato, K. Koshino and T. Martin, Phys. Rev. B 89 (2014) 205318(1-8).

2.

Spatial effect on stochastic dynamics of bistable evolutionary games: K. H. Z. So, H. Otsuki and T. Kato, J. Stat. Mech.
- (2014) P10020(1-34).

3.

双安定進化ゲームの確率的ダイナミクスに対する空間自由度の影響 : 曽弘 博 , 物性研究・電子版 3 (2014) 032601(1-80).

4.

メゾスコピック系の物理―基礎から最近の話題まで―（第 58 回物性若手夏の学校 : 講義）: 加藤 岳生 , 物性研究・電子版 3 (2014) 031201(1-26).

5.

Effects of Coulomb interaction on photon-assisted current noise through a quantum dot: T. J. Suzuki and T. Kato, Phys.
Rev. B 91 (2015) 165302(1-12).

6.

Exact Green’s function for a multiorbital Anderson impurity at high bias voltages: A. Oguri and R. Sakano, Phys. Rev. B
91 (2015) 115429(1-14).

Division of Nanoscale ScienceIye group
Highly anisotropic magneto-transport is observed in single-layer graphene grown on a vicinal SiC(0001) substrate, which hasa step-and-terrace morphology providing a uni-directional modulation. The anisotropy is attributed to the presence of parallel
conduction due to remnant carriers in the SiC substrate which primarily conduct in the direction parallel to the steps. Welldeveloped quantum Hall state with zero resistance manifests itself for the current along the steps, whereas the QHE is obscured
by pronounced positive magnetoresistance with quadratic magnetic-field dependence for the current across the steps. In the low
field range conspicuous negative magnetoresiatance due to localization effect and oscillatory behavior attributed to geometricalresonance and observed.
1.

†*

Highly Anisotropic Parallel Conduction in the Stepped Substrate of Epitaxial Graphene Grown on Vicinal SiC: A.
Endo, F. Komori, K. Morita, T. Kajiwara and S. Tanaka, J Low Temp Phys 179 (2015) 237-250.

Katsumoto group
By using spin-polarization at quantum point contacts (QPCs) spin interference effect in ring shaped interferometer circuit has
been examined. Conductance oscillation pattern characteristic in the spin-interference effect appeared only when spin-polarized
electrons were emitted into the circuit. This is probably due to the fixing of dynamical nuclear polarization. Spin injections
from ferromagnets to two-dimensional electrons in quantum wells and also to two-dimensional system of graphene have beenstudied. In the former high spin injection efficiency of 34% has been attained. In the latter, appearance of spin-orbit interaction
due to slight hydrogenaration has been detected through the inverse spin Hall effect.
1.

High-efficiency graphene nanomesh magnets realized by controlling mono-hydrogenation of pore edges: T. Kato, T.
Nakamura, J. Kamijyo, T. Kobayashi, Y. Yagi and J. Haruyama, Appl. Phys. Lett. 104 (2014) 252410.

2.

半導体量子輸送物性 : 勝本 信吾 , ( 培風館 , 東京 , 2014).

3.

量子の匠 : 勝本 信吾 , ( 丸善 , 東京 , 2014).

Otani group
Our research topics this year include diffusive spin transport, spin Hall effects, magnonic crystals and vortex dynamics.
Concerning the diffusive spin transport, we have succeeded in fully describing spin current properties including the anisotropic
spin absorption in lateral spin valves, which enable one to elucidate intrinsic spin transport and relaxation mechanisms innonmagnets including graphene. As to spin Hall effects, we comprehensively discussed extrinsic spin Hall effects based on our† Joint research with outside partners.

ISSP Activity Report 2014

157

experimental results on SHE in Cu based dilute alloys. We also developed a new scheme for determining the eigenfrequency
of magnetic vortex dynamics, which has been hardly detected electrically because of its nanoscale diameter on the order of theexchange length, without exploiting large magnetoresistive materials or distorted core trajectories for homodyne spin torquediode detection.
1.

Propagation of nonlinearly generated harmonic spin waves in microscopic stripes: O. Rousseau, M. Yamada, K. Miura,
S. Ogawa and Y. Otani, J. Appl. Phys. 115 (2014) 053914.

2.

Width dependent transition of quantized spin-wave modes in Ni80Fe20 square nanorings: C. Banerjee, S. Saha, S.
Barman, O. Rousseau, Y. Otani and A. Barman, J. Appl. Phys. 116 (2014) 163912.

3.

Effect of anisotropic spin absorption on the Hanle effect in lateral spin valves: H. Idzuchi, Y. Fukuma, S. Takahashi, S.
Maekawa and Y. Otani, Phys. Rev. B 89 (2014) 081308.

4.

Extrinsic spin Hall effects measured with lateral spin valve structures: Y. Niimi, H. Suzuki, Y. Kawanishi, Y. Omori, T.
Valet, A. Fert and Y. Otani, Phys. Rev. B 89 (2014) 054401.

5.

Spin Injection into a Superconductor with Strong Spin-Orbit Coupling: T. Wakamura, N. Hasegawa, K. Ohnishi, Y.
Niimi and Y. Otani, Phys. Rev. Lett. 112 (2014) 036602.

6.

Inverse spin Hall effect in a closed loop circuit: Y. Omori, F. Auvray, T. Wakamura, Y. Niimi, A. Fert and Y. Otani, Appl.
Phys. Lett. 104 (2014) 242415.

7.

Modulation of effective damping constant using spin Hall effect: S. Kasai, K. Kondou, H. Sukegawa, S. Mitani, K.
Tsukagoshi and Y. Otani, Appl. Phys. Lett. 104 (2014) 092408.

8.

Thickness dependence of spin torque ferromagnetic resonance in Co75Fe25/Pt bilayer films: A. Ganguly, K. Kondou, H.
Sukegawa, S. Mitani, S. Kasai, Y. Niimi, Y. Otani and A. Barman, Appl. Phys. Lett. 104 (2014) 072405.

9.

Tunable spin wave dynamics in two-dimensional Ni80Fe20 nanodot lattices by varying dot shape: B. K. Mahato, B.
Rana, D. Kumar, S. Barman, S. Sugimoto, Y. Otani and A. Barman, Appl. Phys. Lett. 105 (2014) 012406.

10. Critical exponents and domain structures of magnetic semiconductor EuS and Gd-doped EuS films near Curie temperature: H. Idzuchi, Y. Fukuma, H. S. Park, T. Matsuda, T. Tanigaki, S. Aizawa, M. Shirai, D. Shindo and Y. Otani, Appl.
Phys. Express 7 (2014) 113002.
11. Detection of a symmetric circular gyration of the vortex core via the second-order harmonic magnetoresistance oscillation: S. Sugimoto, N. Hasegawa, Y. Niimi, Y. Fukuma, S. Kasai and Y. Otani, Appl. Phys. Express 7 (2014) 023006.
12. The 2014 Magnetism Roadmap: R. L. Stamps, S. Breitkreutz, J. Åkerman, A. V. Chumak, Y. Otani, G. E. W. Bauer, J.-U.
Thiele, M. Bowen, S. A. Majetich, M. Kläui, I. L. Prejbeanu, B. Dieny, N. M. Dempsey and B. Hillebrands, J. Phys. D:
Appl. Phys. 47 (2014) 333001.
13. Spin transport in non-magnetic nano-structures induced by non-local spin injection: H. Idzuchi, Y. Fukuma and Y. Otani,
Physica E: Low-dimensional Systems and Nanostructures 68 (2015) 239.

Komori group
Electronic structures of the Au-adsorbed Ge(001) surface with a one-dimensional atomic structure were studied by high-resolution ARPES and STS. Two-dimensional Fermi surface of the surface state and decreasing density of states (DOS) toward Fermi
energy are confirmed by ARPES. The latter is also confirmed by STS and attributed to the disorder of the surface lattice. The
unoccupied band structure of a topological insulator BiSb alloy was studied using quasiparticle interference measured by STM.
Absence of the surface band crossing is clarified, indicating this system is a dual topological insulator with the mirror Chern
number −1.
1.

†

2.

†

3.

*

4.

†*

Systematic study of surface magnetism in Si(111)-Fe system grown by solid phase epitaxy: In situ schematic magnetic
phase diagram of Si(111)-Fe: A. N. Hattori, K. Hattori, K. Kataoka, E. Takematsu, A. Ishii, F. Komori and H. Daimon, J.
Magn. Magn. Mater. 363 (2014) 158-165.
Absence of Luttinger liquid behavior in Au-Ge wires: A high-resolution scanning tunneling microscopy and spectroscopy study: J. Park, K. Nakatsuji, T.-H. Kim, S. K. Song, F. Komori and H. W. Yeom, Phys. Rev. B 90 (2014) 165410(5).
Robust Protection from Backscattering in the Topological Insulator Bi1.5Sb0.5Te1.7Se1.3: S. Kim, S. Yoshizawa, Y.
Ishida, K. Eto, K. Segawa, Y. Ando, S. Shin and F. Komori, Phys. Rev. Lett. 112 (2014) 136802(1-5).
Observing hot carrier distribution in an n-type epitaxial graphene on a SiC substrate: T. Someya, H. Fukidome,* Joint research among groups within ISSP.

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Y. Ishida, R. Yoshida, T. Iimori, R. Yukawa, K. Akikubo, Sh. Yamamoto, S. Yamamoto, T. Yamamoto, T. Kanai, K.
Funakubo, M. Suemitsu, J. Itatani, F. Komori, S. Shin and I. Matsuda, Appl. Phys. Lett. 104 (2014) 161103(1-4).
5.

†*

6.

†*

7.

†

8.

†

9.

*

Scanning tunneling microscopic and spectroscopic studies on a crystalline silica monolayer epitaxially formedon hexagonal SiC(000-1) surfaces: H. Tochihara, T. Shirasawa, T. Suzuki, T. Miyamachi, T. Kajiwara, K. Yagyu, S.
Yoshizawa, T. Takahashi, S. Tanaka and F. Komori, Appl. Phys. Lett. 104 (2014) 051601(1-4).
Electronic Structure and Photoelectrochemical Properties of an Ir-Doped SrTiO3 Photocatalyst: S. Kawasaki, R.
Takahashi, K. Akagi, J. Yoshinobu, F. Komori, K. Horiba, H. Kumigashira, K. Iwashina, A. Kudo and M. Lippmaa, J.
Phys. Chem. C 118 (2014) 20222-20228.
Formation of linearly linked Fe clusters on Si(111)-7x7-C2H5OH surface: W. Ding, D. Ju, Y. Guo, K.-I. Tanaka and F.
Komori, Nanoscale Res Lett 9 (2014) 377 (6).
Nonlinear terahertz field-induced carrier dynamics in photoexcited epitaxial monolayer graphene: H. A. Hafez, I.
Al-Naib, M. M. Dignam, Y. Sekine, K. Oguri, F. Blanchard, D. G. Cooke, S. Tanaka, F. Komori, H. Hibino and T. Ozaki,
Phys. Rev. B 91 (2015) 035422 (9).
Scanning tunneling spectroscopy study of quasiparticle interference on dual topological insulator Bi 1-xSbx: S.
Yoshizawa, F. Nakamura, A. A. Taskin, T. Iimori, K. Nakatsuji, I. Matsuda, Y. Ando and F. Komori, Phys. Rev. B 91
(2015) 045423-1,-6.

10. †*Highly Anisotropic Parallel Conduction in the Stepped Substrate of Epitaxial Graphene Grown on Vicinal SiC: A.
Endo, F. Komori, K. Morita, T. Kajiwara and S. Tanaka, J Low Temp Phys 179 (2015) 237-250.
11. フェルミガス的に振る舞う表面 1 次元金属電子 : 矢治 浩一郎 , 小森 文夫 , 表面科学 35 (2014) 426-431.

Yoshinobu group
We conducted several research projects in the fiscal year 2014. (1) The activation and hydrogenation of CO2 on Cu(997) studied
by SR-PES and IRAS. (2) The adsorption and decomposition of formic acid on Zn-Cu(111) studied by SR-PES and IRAS. (3)Spectroscopic characterization of chemically modified graphene (4)Construction of ambient-pressure XPS system at SPring-8.
(5) The formation and characterization of oxynitride of SrTiO3.
1.

Quantitative analysis of chemical interaction and doping of the Si(111) native oxide surface with tetrafluorotetracyanoquinodimethane: S. Yoshimoto, M. Furuhashi, T. Koitaya, Y. Shiozawa, K. Fujimaki, Y. Harada, K. Mukai and J. Yoshinobu, J. Appl. Phys. 115 (2014) 143709 (6 pages).

2.

†

3.

Core level excitations of a fingerprint of structural and electronic properties of epitaxial silicene: R. Friedlein, A. Fleurence, K. Aoyagi, M. P. de Jong, H. Van Bui, F. B. Wiggers, S. Yoshimoto, T. Koitaya, S. Shimizu, H. Noritake, K.
Mukai, J. Yoshinobu and Y. Yamada- Takamura, J. Chem. Phys. 140 (2014) 184704 (6 pages).

4.

†

5.

Aqueous-Phase Oxidation of Epitaxial Graphene on the Silicon Face of SiC(0001): Md. Zakir Hossain, M. B. A. Razak,
S. Yoshimoto, K. Mukai, T. Koitaya, J. Yoshinobu, H. Sone, S. Hosaka and M. C. Hersam, J. Phys. Chem. C 118 (2014)
1014-1020.

6.

†*Electronic Structure and Photoelectrochemical Properties of an Ir-Doped SrTiO3 Photocatalyst: S. Kawasaki, R.
Takahashi, K. Akagi, J. Yoshinobu, F. Komori, K. Horiba, H. Kumigashira, K. Iwashina, A. Kudo and M. Lippmaa, J.
Phys. Chem. C 118 (2014) 20222-20228.

7.

†

8.

Structure and Photo-Induced Charge Transfer of Pyridine Molecules Adsorbed on TiO2(110): A NEXAFS and CoreHole-Clock Study: H. Kondoh, Y. Higashi, M. Yoshida, Y. Monya, R. Toyoshima, K. Mase, K. Amemiya, F. Tsukioka,
M. Nagasaka, Y. Iwasawa, H. Orita, K. Mukai and J. Yoshinobu, Electrochemistry 82 (2014) 341-345.

9.

Interface state and energy level alignment of F4-TCNQ sandwiched between a pentacene film and the ethyleneterminated Si(100) surface: S. Yoshimoto, K. Kameshima, T. Koitaya, Y. Harada, K. Mukai and J. Yoshinobu, Organic

Configurational change of NO on Cu(110) as a function of temperature: A. Shiotari, T. Mitsui, H. Okuyama, S. Hatta,
T. Aruga, T. Koitaya and J. Yoshinobu, J. Chem. Phys. 140 (2014) 214706 (6 pages).

Electronic structure of α-sexithiophene ultrathin films grown on passivated Si(001) surfaces: K. Hiraga, H. Toyoshima,
H. Tanaka, K. Inoue, S. Ohno, K. Mukai, J. Yoshinobu and M. Tanaka, Appl. Surf. Sci. 307 (2014) 520-524.

Monolayer selective methylation of epitaxial graphene on SiC(0001) through two-step chlorination-alkylation
reactions: Md. Zakir Hossain, M. B. A. Razak, H. Noritake, Y. Shiozawa, S. Yoshimoto, K. Mukai, T. Koitaya, J. Yoshinobu and S. Hosaka, J. Phys. Chem. C 118 (2014) 22096-22101.

† Joint research with outside partners.

ISSP Activity Report 2014159

Electronics 15 (2014) 356-364.
10. 淡青評論「東京大学憲章を読んでみませんか」: 吉信 淳 , 学内広報 1450 (2014) 12.
11. The Quantum Nature of CH···metal Interaction: Vibrational Spectra and Kinetic and Geometric Isotope Effects ofAdsorbed Cyclohexane: T. Koitaya and J. Yoshinobu, The Chemical Record 14 (2014) 848-856.
12. 「水素の事典」のうち 5 章 1-a（p.86-p.89）を分担執筆．: 水素エ ネルギー協会編 , ( 朝倉書店 , 東京 , 2014).

Hasegawa group
Using a low temperature scanning tunneling microscopy (LT-STM), we investigated electrical conductance at atomic point
contact and found that the conductance depends on the atomic site on the substrate where the point contact is formed. For
instance, the point contact conductance measured on a 3-fold hollow site of the Pb(111) substrate is larger than that measured
at on-top site. We also found that the conductances measured at the two sites were reversed when the tip and substrate wasseparated by 20 pm from the contact. These contact-atomic-site and gap-distance dependences can be explained with thenumber of the substrate atoms chemically—— interacted with the tip-apex atom. We also studied vortices on superconducting
surface structure of the Si(111)-(√ 7 × √ 3 )-In using a LT-STM. At step edges of the two-dimensional superconductor weobserved vortices whose shape was elongated along the step edges and whose core still exhibited a weak superconducting gap.
These anomalous features can be explained by the Josephson vortices localized at the step edges, and this also evidences the
Josephson coupling at the step edges. We also studied the relation of magnetic anisotropy and stacking fault in hcp Co island
structures formed on the Ag(111) substrate using a spin-polarized STM. From a magnetization curve we measured on individual
islands, we found that the hcp-stacked Co islands exhibit perpendicular magnetic anisotropy whereas the ones with stacking
fault have in-plane magnetization. First principle calculations clearly demonstrate the weakened magnetocrystalline anisotropy
and dominance of the shape anisotropy by the stacking fault insertion into the hcp island structures.
——
1. †Imaging Josephson Vortices on the Surface Superconductor Si(111)-(√ 7 × √ 3 )-In using a Scanning Tunneling Microscope: S. Yoshizawa, H. Kim, T. Kawakami, Y. Nagai, T. Nakayama, X. Hu, Y. Hasegawa and T. Uchihashi, Phys. Rev.
Lett. 113 (2014) 247004(1-5).
2.

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3.

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4.

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5.

Site-Dependent Evolution of Electrical Conductance from Tunneling to Atomic Point Contact: H. Kim and Y. Hasegawa,Phys. Rev. Lett. 114 (2015) 206801(1-5).
——†
Impact of Surface Conditions on the Superconductivity of Si(111)-(√ 7 × √ 3 )-In: S. Yoshizawa, H. Kim, T. Kawakami,
Y. Nagai, T. Nakayama, X. Hu, Y. Hasegawa and T. Uchihashi, e-J. Surf. Sci. Nanotech. 13 (2015) 151-154.

6.

Microscopic origin of the π states in epitaxial silicene: A. Fleurence, Y. Yoshida, C. -C. Lee, T. Ozaki, Y. YamadaTakamura and Y. Hasegawa, Appl. Phys. Lett. 104 (2014) 021605 (4 pages).
Scanning tunneling microscopy/spectroscopy of picene thin films formed on Ag(111): Y. Yoshida, H.-H. Yang, H.-S.
Huang, S.-Y. Guan, S. Yanagisawa, T. Yokosuka, M.-T. Lin, W.-B. Su, C.-S. Chang, G. Hoffmann and Y. Hasegawa, J.
Chem. Phys. 141 (2014) 114701(1-8).
Excitation spectrum of Josephson vortices on surface superconductor: T. Kawakami, Y. Nagai, S. Yoshizawa, H. Kim,
Y. Hasegawa, T. Nakayama, T. Uchihashi and X. Hu, J. Phys.: Conf. Ser. 568 (2014) 022022(1-5).

Lippmaa group
Our main projects are related to the development of photocatalytic oxides and nanoscale multiferroic materials. In catalyst
development, we look the effects of noble metal doping in SrTiO3. Recent work shows that Ir and Pt dopants tend to segregate
into metallic clusters at specific oxygen activities during crystal growth. The segregated metals form nanoscale pillar structuresthat are embedded in the perovskite lattice and can function as embedded charge collections electrodes that help to extract
photogenerated charge from the bulk of the photocatalyst. Our recent work on multiferroic materials has proven that a polarstate appears in magnetite immediately at the charge ordering temperature of 120 K. A new double perovskite oxide phase,
La2NiMnO6 was found to become multiferroic under epitaxial strain. The cause of the polar state was found to be an offset of
La ions at the perovskite A site.
1.

Growth temperature effect on the structural and magnetic properties of Fe3O4 films grown by the self-template method:
R. Takahashi, H. Misumi and M. Lippmaa, J. Appl. Phys. 116 (2014) 033918(1-7).

2.

Pulsed laser deposition of epitaxial BeO thin films on sapphire and SrTiO3: T. Peltier, R. Takahashi and M. Lippmaa,
Appl. Phys. Lett. 104 (2014) 231608(1-4).

3.

†*

Electronic Structure and Photoelectrochemical Properties of an Ir-Doped SrTiO3 Photocatalyst: S. Kawasaki, R.
Takahashi, K. Akagi, J. Yoshinobu, F. Komori, K. Horiba, H. Kumigashira, K. Iwashina, A. Kudo and M. Lippmaa, J.
* Joint research among groups within ISSP.

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Phys. Chem. C 118 (2014) 20222-20228.
4.

Spontaneous Growth of Strain-Free Magnetite Nanocrystals via Temperature-Driven Dewetting: R. Takahashi, H.
Misumi, T. Yamamoto and M. Lippmaa, Crystal Growth & Design 14 (2014) 1264-1271.

5.

Interfacial capacitance between a ferroelectric Fe3O4 thin film and a semiconducting Nb:SrTiO3 substrate: R. Takahashi,
Y. Cho and M. Lippmaa, J. Appl. Phys. 117 (2015) 014104(1-10).

6.

A-site-driven ferroelectricity in strained ferromagnetic La2NiMnO6 thin films: R. Takahashi, I. Ohkubo, K. Yamauchi,
M. Kitamura, Y. Sakurai, M. Oshima, T. Oguchi, Y. Cho and M. Lippmaa, Phys. Rev. B 91 (2015) 134107 (1-9).

7.

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8.

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Determination of band diagram for a p-n junction between Mott insulator LaMnO3 and band insulator Nb:SrTiO3: M.
Kitamura, M. Kobayashi, E. Sakai, R. Takahashi, M. Lippmaa, K. Horiba, H. Fujioka and H. Kumigashira, Appl. Phys.
Lett. 106 (2015) 061605 (1-5).
Photo-electrochemical epitaxy of silver-oxide clathrate Ag7O8M (M=NO3, HSO4) on rutile-type Nb-doped TiO2 single
crystals: R. Tanaka, R. Takahashi, S. Takata, M. Lippmaa and Y. Matsumoto, CrystEngComm 17 (2015) 3701-3707.

Division of Physics in Extreme Conditions
Uwatoko group
The electrical resistivity of the nonmagnetic quadrupolar system PrTi2Al20 under pressure has been measured. The experimental
results suggest that critical fluctuations associated with the ferroquadrupole order may mediate superconductivity. The resistivity and ac susceptibility measurements of the topological insulator Bi2Te3 single crystals have been reported up to 11 GPa.
Under highly hydrostatic pressure conditions generated in a multi-anvil high-pressure apparatus, a pressure- induced superconductivity only appears above a critical pressure PC ∼ 7 GPa, coinciding with a structural transition from a rhombohedral to a
monoclinic structure. By using an integrated-fin gasket technique made from the semi-sintered MgO ceramics and the tungstencarbide anvils of 2.5 mm square top, we successfully generate pressures over 16 GPa at both room and cryogenic temperatures
down to 0.5 K. We report on the discovery of superconductivity on the verge of antiferromagnetic order in CrAs via the application of external pressure. Bulk superconductivity with Tc≈2&thinsp;K emerges at the critical pressure Pc≈8&thinsp;kbar, where
the first-order antiferromagnetic transition at TN≈265&thinsp;K under ambient pressure is completely suppressed.
1.

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2.

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3.

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4.

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5.

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6.

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7.

Long-range antiferromagnetic order in the frustrated XY pyrochlore antiferromagnet Er2Ge2O7: X. Li, W. M. Li, K.
Matsubayashi, Y. Sato, C. Q. Jin, Y. Uwatoko, T. Kawae, A. M. Hallas, C. R. Wiebe, A. M. Arevalo-Lopez, J. P. Attfield,
J. S. Gardner, R. S. Freitas, H. D. Zhou and J. -G. Cheng, Phys. Rev. B 89 (2014) 064409 (1-7).

8.

Superconductivity in the topological insulator Bi2Te3 under hydrostatic pressure: K. Matsubayashi, T. Terai, J. S. Zhou
and Y. Uwatoko, Phys. Rev. B 90 (2014) 125126.

9.

Integrated-fin gasket for palm cubic-anvil high pressure apparatus: J. -G. Cheng, K. Matsubayashi, S. Nagasaki, A.
Hisada, T. Hirayama, M. Hedo, H. Kagi and Y. Uwatoko, Rev. Sci. Instrum. 85 (2014) 093907(1-6).

Heavy fermion superconductivity under pressure in the quadrupole system PrTi2Al20: K. Matsubayashi, T. Tanaka, J.
Suzuki, A. Sakai, S. Nakatsuji, K. Kitagawa, Y. Kubo and Y. Uwatoko, J. Phys. Soc. Jpn. 3 (2014) 011077 (1-5).
Magnetic and Fermi Surface Properties of Antiferromagnet EuCd11: A. Nakamura, Y. Hiranaka, T. Uejo, T. Takeuchi,
F. Honda, H. Harima, K. Matsubayashi, Y. Uwatoko, M. Hedo, T. Nakama and Y. Onuki, J. Phys. Soc. Jpn. 83 (2014)
074714.
Superconductivity on a Crossover Phenomenon of Spin–Ladder System SrCa 13 Cu 24 O 41 Single Crystals: A. Hisada,
K. Matsubayashi, Y. Uwatoko, N. Fujiwara, G. Deng, E. Pomjakushina, K. Conder, D. M. Radheep, R. Thiyagarajan, S.
Esakkimuthu and S. Arumugam, J. Phys. Soc. Jpn. 83 (2014) 073703.
Anomalous pressure dependence of the superconductivity in noncentrosymmetric LaNiC2: Evidence of strong
electronic correlations: S. Katano, H. Nakagawa, K. Matsubayashi, Y. Uwatoko, H. Soeda, T. Tomita and H. Takahashi,
Phys. Rev. B 90 (2014) 220508 (1-4).
Doping- and pressure-induced change of electrical and magnetic properties in the Fe-based spin-ladder compoundBaFe2Se3: F. Du, Y. Hirata, K. Matsubayashi, Y. Uwatoko, Y. Ueda and K. Ohgushi, Phys. Rev. B 90 (2014) 085143.
High-pressure effects in anti-post-perovskite superconductors V3PnNx (Pn = P, As): B. S. Wang, J. -G. Cheng, K.
Matsubayashi, Y. Uwatoko and K. Ohgushi, Phys. Rev. B 89 (2014) 144510 (1-4).

† Joint research with outside partners.

ISSP Activity Report 2014161

10. Abnormal Elastic and Vibrational Behaviors of Magnetite at High Pressures: J.-F. Lin, J. Wu, J. Zhu, Z. Mao, A. H.
Said, B. M. Leu, J. Cheng, Y. Uwatoko, C. Jin and J. Zhou, Sci. Rep. 4 (2014) 6282(1-11).
11. †Magnetic Field Effect on Magnetic and Electrical Properties ofMn2-xCuxSb: Y. Matsumoto, H. Orihashi, K. Matsubayashi, Y. Uwatoko, M. Hiroi and K. Koyama, IEEE Transactions on Magnetics 50 (2014) 1000704(1-4).
12. High Pressure Effect on Superconductivity of Hole-Doped Pr0.75Sr0.25FeAsO Iron Pnictides: N. R. Tamilselvan, M.
Kanagaraj, K. Murata, H. Yoshino, S. Arumugam, A. Yamada, Y. Uwatoko and S. Kumararaman, J Supercond Nov
Magn 27 (2014) 1381-1385.
13. Superconductivity in the vicinity of antiferromagnetic order in CrAs: W. Wu, J. Cheng, K. Matsubayashi, P. Kong, F.
Lin, C. Jin, N. Wang, Y. Uwatoko and J. Luo, Nat Comms 5 (2014) 5508.
14. Correlation between Tc and Crystal Structure in S-Doped FeSe Superconductors under Pressure: Studied by X-ray
Diffraction of FeSe0.8S0.2 at Low Temperatures: T. Tomita, H. Takahashi, H. Takahashi, H. Okada, Y. Mizuguchi, Y.
Takano, S. Nakano, K. Matsubayashi and Y. Uwatoko, J. Phys. Soc. Jpn. 84 (2015) 024713(1-8).
15. *Temperature and composition phase diagram in the iron-based ladder compounds Ba1−xCsxFe2Se3: T. Hawai, Y.
Nambu, K. Ohgushi, F. Du, Y. Hirata, M. Avdeev, Y. Uwatoko, Y. Sekine, H. Fukazawa, J. Ma, S. Chi, Y. Ueda, H.
Yoshizawa and T. J. Sato, Phys. Rev. B 91 (2015) 184416.
16. Pressure Induced Superconductivity on the border of Magnetic Order in MnP: J. -G. Cheng, K. Matsubayashi, W. Wu, J.
P. Sun, F. K. Lin, J. L. Luo and Y. Uwatoko, Phys. Rev. Lett. 114 (2015) 117001(1-18).
17. Pressure-Induced Valence Crossover and Novel Metamagnetic Behavior near the Antiferromagnetic Quantum Phase
Transition of YbNi 3Ga9: K. Matsubayashi, T. Hirayama, T. Yamashita, S. Ohara, N. Kawamura, M. Mizumaki, N.
Ishimatsu, S. Watanabe, K. Kitagawa and Y. Uwatoko, Phys. Rev. Lett. 114 (2015) 086401(1-5).
18. *High Pressure Measurements of the Resistivity of β -YbAlB 4: T. Tomita, K. Kuga, Y. Uwatoko and S. Nakatsuji, J.
Phys.: Conf. Ser. 592 (2015) 012019.
19. Electron transport in TTF-CA under High pressures: R. Takehara, K. Miyagawa, K. Kanoda, T. Miyamoto, H. Matsuzaki, H. Okamoto, H. Taniguchi, K. Matsubayashi and Y. Uwatoko, Physica B: Condensed Matter 460 (2015) 83-87.
20. Charge disproportionation and the pressure-induced insulator–metal transition in cubic perovskite PbCrO3: J. Cheng,
K. E. Kweon, S. A. Larregola, Y. Ding, Y. Shirako, L. G. Marshall, Z. -Y. Li, X. Li, A. M. D. Santos, M. R. Suchomel,
K. Matsubayashi, Y. Uwatoko, G. S. Hwang, J. B. Goodenough and J. -S. Zhou, Proc Natl Acad Sci USA 112 (2015)
1670-1674.

Osada group
Using a simple Slater-Koster-Harrison LCAO model, we have qualitatively studied the edge state of bilayer phosphorene, which
is a unit structure of the layered crystal of black phosphorus. This model successfully reproduces the isolated edge state in thebulk gap in monolayer phosphorene. In bilayer phosphorene, however, it shows that edge states are almost buried in the valenceband and there is no isolated midgap edge state at the zigzag edge. Since the buried edge state works as acceptor, holes are
doped from the edge state into the bulk. This gives a possible explanation for p-type conduction in undoped black phosphorus.
Under the vertical electric field, the intrinsic hole doping is reduced because a part of edge states move into the gap. Thesefeatures of bilayer phosphorene might be better suited for device application.
1.

有機ディラック電子系における量子ホール状態 : 田嶋 尚也 , 佐藤 光幸 , 鴻池 貴子 , 長田 俊人 , 固体物理 49 (2014)229-240.
2.

Edge State and Intrinsic Hole Doping in Bilayer Phosphorene: T. Osada, J. Phys. Soc. Jpn. 84 (2015) 013703/1-4.

3.

Surface Transport in the n=0 Quantum Hall Ferromagnetic State in the Organic Dirac Fermion System: T. Osada, J.
Phys. Soc. Jpn. 84 (2015) 053704/1-4.

Yamashita group
From longitudinal and transverse thermal transport measurements of kagome material Volborthite, we've found a magnon
thermal conduction below the Neel temperature. We also found that there is a finite thermal Hall effect in the kagome insulator
above the Neel temperature, which indicate a formation of a non-trivial spin texture as entering the QSL phase. We also havemade thermal transport measurements of an organic QSL candidate, kappa-H3(CAT-EDT-TTF)2, down to 100 mK. We findthat the phonons are strongly scattered in this compound down to very low temperature, although the material is very clean. By
comparing the thermal conductivity of the pristine and the deuterated samples, we find the proton fluctuations in the pristine* Joint research among groups within ISSP.

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compound persist down to 300 mK. This proton fluctuation can be the origin to stabilize the QSL state of the material. As ajoint research with Prof. Sasaki from IMR, Tohoku University, we’ve performed magnetic torque measurements at ultra-low
temperatures. By using the nuclear demagnetization cryostat inherited from Ishimoto group, we’ve cooled organic superconductors down to 2 mK and measured the dHvA oscillations. To our best knowledge, this is the very first trial to measure a quantum
oscillation below the dilution temperature. Moreover, from the temperature dependence of the torque-field curve, we succeeded
to extend the vortex phase diagram of the 2D superconductor down to the ultra-low temperatures. As a joint project with Dr.
Yoshida from Takigawa group in ISSP, we’ve also performed NMR measurements of kagome volborthite by using the ultralow cryostat. We’ve found that the NMR spectrum at low fields shows a drastic change at the ultra-low temperatures, which is
expected to clarify the unconventional magnetic order of the kagomé compound.

Materials Design and Characterization Laboratory
Hiroi group
A new type of magnetically frustrated lattice was found in the layered fluoride NaBa2Mn3F11. A kagome-type array of regulartriangles composed of Mn2+ ions (spin 5/2) deforms so as to generate the next-nearest-neighbor interaction J2 between threeout of six spins in the hexagon of a normal kagome lattice, in addition to the nearest-neighbor interaction J1. As a functionof |J2/J1|, this lattice can interconnect the kagome (J2 = 0) and the triangular (J2 = J1) lattices and thus is called the kagome–
triangular (KT) lattice. Magnetic susceptibility and heat capacity measurements performed on a polycrystalline sample of
NaBa2Mn3F11 show an intensive short-range antiferromagnetic correlation below 14 K probably due to the specific magnetic
frustration of the KT lattice. In addition, a long-range order at 2.0 K is observed, which is significantly low compared with theantiferromagnetic Weiss temperature of 32.3 K. Theoretical considerations of Heisenberg spins in the KT lattice reveal unique
non-coplanar magnetic orders in the case of ferromagnetic J1 and antiferromagnetic J2. NaBa2Mn3F11 may actually exist in
this regime according to the results of our analysis based on classical Monte-Carlo simulation. In a frustrated J1–J2 chain
with the nearest-neighbor ferromagnetic interaction J1 and the next-nearest-neighbor antiferromagnetic interaction J2, novel
magnetic states such as a spin-nematic state are theoretically expected. However, they have been rarely examined in experiments
because of the difficulty in obtaining suitable model compounds. We show here that the quasi-one-dimensional antiferromagnet
NaCuMoO4(OH), which comprises edge-sharing CuO2 chains, is a good candidate J1–J2 chain antiferromagnet. The exchangeinteractions are estimated as J1 = −51 K and J2 = 36 K by comparing the magnetic susceptibility, heat capacity, and magnetization data with the data obtained using calculations by the exact diagonalization method. High-field magnetization measurements
at 1.3 K show a saturation above 26 T with little evidence of a spin nematic state expected just below the saturation field, which
is probably due to smearing effects caused by thermal fluctuations and the polycrystalline nature of the sample.
1.

Novel rattling of K atoms in aluminium-doped defect pyrochlore tungstate: E. Shoko, G. J. Kearley, V. K. Peterson, H.
Mutka, M. M. Koza, J.-I. Yamaura, Z. Hiroi and G. J. Thorogood, J. Phys.: Condens. Matter 26 (2014) 305401.

2.

*

3.

†*

4.

*

5.

†*

6.

*

7.

Helical order and multiferroicity in the S=12 quasi-kagome system KCu3As2O7(OD)3: G. J. Nilsen, Y. Okamoto, H.
Ishikawa, V. Simonet, C. V. Colin, A. Cano, L. C. Chapon, T. Hansen, H. Mutka and Z. Hiroi, Phys. Rev. B 89 (2014)
140412.

8.

*

9.

†*

Absence of Metallic Conductivity in Tetragonal and Cubic PbVO3 at High Pressure: A. A. Belik, T. Yamauchi, H.
Ueda, Y. Ueda, H. Yusa, N. Hirao and M. Azuma, J. Phys. Soc. Jpn. 83 (2014) 074711.
Electronic State of CeFe4As12 Investigated by Using Single Crystals Grown under High Pressure of 4 GPa: Y. Ogawa,
H. Sato, M. Watanabe, T. Namiki, S. Tatsuoka, R. Higashinaka, Y. Aoki, K. Kuwahara, J.-I. Yamaura and Z. Hiroi, J.
Phys. Soc. Jpn. 83 (2014) 034710.
Kagome–Triangular Lattice Antiferromagnet NaBa2Mn3F11: H. Ishikawa, T. Okubo, Y. Okamoto and Z. Hiroi, J. Phys.
Soc. Jpn. 83 (2014) 043703(1-5).
NaCuMoO4(OH) as a Candidate Frustrated J1–J2 Chain Quantum Magnet: K. Nawa, Y. Okamoto, A. Matsuo, K.
Kindo, Y. Kitahara, S. Yoshida, S. Ikeda, S. Hara, T. Sakurai, S. Okubo, H. Ohta and Z. Hiroi, J. Phys. Soc. Jpn. 83(2014) 103702.
Superconductivity in the Hypervalent Compound Ba2Bi(Sb1−xBix)2 with a Square-Honeycomb Lattice: T. Yajima,
F. Takeiri, Y. Nozaki, Z. Li, T. Tohyama, M. A. Green, Y. Kobayashi and H. Kageyama, J. Phys. Soc. Jpn. 83 (2014)
073705.

Novel Phase Transitions in the Breathing Pyrochlore Lattice:7Li-NMR on LiInCr4O8 and LiGaCr4O8: Y. Tanaka, M.
Yoshida, M. Takigawa, Y. Okamoto and Z. Hiroi, Phys. Rev. Lett. 113 (2014) 227204(1-5).
Phase transitions and hydrogen bonding in deuterated calcium hydroxide: High-pressure and high-temperature neutron† Joint research with outside partners.

ISSP Activity Report 2014163

diffraction measurements: R. Iizuka, K. Komatsu, H. Kagi, T. Nagai, A. Sano-Furukawa, T. Hattori, H. Gotou and T.
Yagi, J. Solid State Chem. 218 (2014) 95.
10. †*Pressure-induced oligomerization of benzene at room temperature as a precursory reaction of amorphization: A.
Shinozaki, K. Mimura, H. Kagi, K. Komatu, N. Noguchi and H. Gotou, J. Chem. Phys. 141 (2014) 084306.
11. †*Spin Polarization Measurements of Heusler Alloy Ru0.2Fe1.8CrSi by Andreev Reflection Technique: I. Shigeta, Y.
Maeda, K. Harumori, Y. Nishisako, M. Ito, T. Yamauchi and M. Hiroi, IEEE Trans. Magn. 50 (2014) 1.
12. Spin dynamics of Mn pyrochlore lattice in YMn 2 Zn 20- x In x : M. Miyazaki, R. Kadono, M. Hiraishi, I. Yamauchi, A.
Koda, K. M. Kojima, I. Kawasaki, I. Watanabe, Y. Okamoto and Z. Hiroi, J. Phys.: Conf. Ser. 551 (2014) 012019.
13. Thermoelectric properties of Sr and Mg double-substituted LaCoO3 at room temperature: A. Jiamprasertboon, Y.
Okamoto, Z. Hiroi and T. Siritanon, Ceramics International 40 (2014) 12729.
14. *Charge Order Induced by Cation Order in δ-Ag2/3V2O5: T. Baba, T. Yamauchi, S. Yamazaki, H. Ueda, M. Isobe, Y.
Matsushita and Y. Ueda, J. Phys. Soc. Jpn. 84 (2015) 024718.
15. *Superconductivity in 122-type antimonide BaPt2Sb2: M. Imai, S. Ibuka, N. Kikugawa, T. Terashima, S. Uji, T. Yajima,
H. Kageyama and I. Hase, Phys. Rev. B 91 (2015) 014513.
16. Structural instability of the rutile compounds and its relevance to the metal–insulator transition of VO2: Z. Hiroi,
Progress in Solid State Chemistry 43 (2015) 47.
17. *Substrate-induced anion rearrangement in epitaxial thin films of LaSrCoO4−xHx: G. Bouilly, T. Yajima, T. Terashima,
Y. Kususe, K. Fujita, C. Tassel, T. Yamamoto, K. Tanaka, Y. Kobayashi and H. Kageyama, CrystEngComm 16 (2015)
9669-9674.
18. *Superconducting properties of BaTi2Pn2O (Pn = Sb, Bi): T. Yajima, K. Nakano, Y. Nozaki and H. Kageyama, Physica
C: Superconductivity 504 (2015) 36-38.
19. Superconductivity in LaPd2As2 with a collapsed 122 structure: S. Ganesanpotti, T. Yajima, K. Nakano, Y. Nozaki, T.
Yamamoto, C. Tassel, Y. Kobayashi and H. Kageyama, Journal of Alloys and Compounds 613 (2015) 370-374.
20. Lifshitz metal–insulator transition induced by the all-in/all-out magnetic order in the pyrochlore oxide Cd2Os2O7: Z.
Hiroi, J. Yamaura, T. Hirose, I. Nagashima and Y. Okamoto, APL Mater. 3 (2015) 041501.

Kawashima group
We have been investigating quantum spin/boson systems and frustrated systems by means of large-scale numerical simulation.
We also develop new numerical techniques. Our group's achievements of 2014 include: (1) accumulating evidences for thedeconfined critical phenomena in the SU(N) J-Q Heisenberg model, (2) proposal of new update scheme for quantum Monte
Carlo method, which is based on the worm algorithm, but, unlike the conventional one, can be run by space-decomposition
parallelization, and (3) large-scale non-equilibrium molecular dynamics simulation of bubble growth in under-pressured neartransition liquid.
1.

*

2.

Parallelized Quantum Monte Carlo Algorithm with Nonlocal Worm Updates: A. Masaki-Kato, T. Suzuki, K. Harada, S.
Todo and N. Kawashima, Phys. Rev. Lett. 112 (2014) 140603(1-5).

3.

Phase Transitions with Discrete Symmetry Breaking in Antiferromagnetic Heisenberg Models on a Triangular Lattice:
R. Tamura, S. Tanaka and N. Kawashima, JPS Conf. Proc. --- Proceedings of the 12th Asia Pacific Physics Conference(APPC12) 1 (2014) 012125(1-5).

4.

大規模並列化量子モンテカルロ法の開発と冷却ボーズ原子系のシミュレーション : 正木 晶子 , スーパーコンピューティング
ニュース 16-6 (2014) 15-24.

5.

Thermal phase transition of generalized Heisenberg models for SU(N) spins on square and honeycomb lattices: T.
Suzuki, K. Harada, H. Matsuo, S. Todo and N. Kawashima, Phys. Rev. B 91 (2015) 094414.

6.

Thermal phase transitions to valence-bond-solid phase in the two dimensional; generalized SU(N) Heisenberg models:T. Suzuki, K. Harada, H. Matsuo, S. Todo and N. Kawashima, J. Phys.:Conf. Ser. 592 (2015) 012114.

7.

Scaling relation for dangerously irrelevant symmetry-breaking fields: T. Okubo, K. Oshikawa, H. Watanabe and N.
Kawashima, Phys. Rev. B (2015), accepted for publication.

Kagome–Triangular Lattice Antiferromagnet NaBa2Mn3F11: H. Ishikawa, T. Okubo, Y. Okamoto and Z. Hiroi, J. Phys.
Soc. Jpn. 83 (2014) 043703(1-5).

* Joint research among groups within ISSP.

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Noguchi group
We have studied morphologies of a double-bilayer vesicle theoretically and experimentally in collaboration with Prof. M. Imai.
We found that the confinement of the outer vesicle induces several shapes of the inner vesicles that had not been observed inunilamellar vesicles: double and quadruple stomatocytes, slit vesicle, and vesicles of two or three compartments with various
shapes. Our simulations reproduced the experimental results very well. We also studied the assembly of banana-shaped proteinson biomembrane and dynamics of deformable microsimmers.
1.

Deformable microswimmer in a swirl: Capturing and scattering dynamics: M. Tarama, A. M. Menzel and H. Löwen,Phys. Rev. E 90 (2014) 032907.

2.

Morphological variation of a lipid vesicle confined in a spherical vesicle: A. Sakashita, M. Imai and H. Noguchi, Phys.
Rev. E 89 (2014) 040701.

3.

Tunable dynamic response of magnetic gels: Impact of structural properties and magnetic fields: M. Tarama, P. Cremer,
D. Y. Borin, S. Odenbach, H. Löwen and A. M. Menzel, Phys. Rev. E 90 (2014) 042311/1-9.

4.

Individual and collective dynamics of self-propelled soft particles: M. Tarama, Y. Itino, A. M. Menzel and T. Ohta, Eur.
Phys. J. Spec. Top. 223 (2014) 121.

5.

Multiscale modeling of blood flow: from single cells to blood rheology: D. A. Fedosov, H. Noguchi and G. Gompper,
Biomech. Model. Mechanobiol. 13 (2014) 239-258.

6.

Two- or three-step assembly of banana-shaped proteins coupled with shape transformation of lipid membranes: H.
Noguchi, EPL 108 (2014) 48001.

7.

界面活性剤系の構造形成の粗視化分子シミュレーション : 芝隼 人 , 野口 博司 , 分子シミュレーション研究会会誌 “アンサンブル” 16 (2014) 59-65.

8.

粒子描像の流体力学計算手法 III: 野口 博司 , 分子シミュレーション研究会会誌 “アンサンブル” 16(3) (2014) 211-214.

9.

粒子描像の流体力学計算手法 II: 野口 博司 , 分子シミュレーション研究会会誌 “アンサンブル” 16(2) (2014) 118-121.

10. 粒子描像の流体力学計算手法 IV: 野口 博司 , 分子シミュレーション研究会会誌 “アンサンブル” 16(4) (2014) 252-254.
11. Morphological changes of amphiphilic molecular assemblies induced by chemical reactions: K. M. Nakagawa and H.
Noguchi, Soft Matter 11 (2015) 1403-1411.
12. Shape transformations of toroidal vesicles: H. Noguchi, A. Sakashita and M. Imai, Soft Matter 11 (2015) 193.

Materials Synthesis and Characterization group
1.

†*

2.

*

Superconductivity in the Hypervalent Compound Ba2Bi(Sb1−xBix)2 with a Square-Honeycomb Lattice: T. Yajima,
F. Takeiri, Y. Nozaki, Z. Li, T. Tohyama, M. A. Green, Y. Kobayashi and H. Kageyama, J. Phys. Soc. Jpn. 83 (2014)
073705.

3.

†

4.

†

5.

†*

6.

†*

7.

†*

Electronic State of CeFe4As12 Investigated by Using Single Crystals Grown under High Pressure of 4 GPa: Y. Ogawa,
H. Sato, M. Watanabe, T. Namiki, S. Tatsuoka, R. Higashinaka, Y. Aoki, K. Kuwahara, J.-I. Yamaura and Z. Hiroi, J.
Phys. Soc. Jpn. 83 (2014) 034710.

Magnetic properties of Mn–Bi melt-spun ribbons: T. Saito, R. Nishimura and D. Nishio-Hamane, J. Magn. Magn.
Mater. 349 (2014) 9.
Successive phase transitions driven by orbital ordering and electron transfer in quasi-two-dimensional CrSe2 with atriangular lattice: S. Kobayashi, H. Ueda, D. Nishio-Hamane, C. Michioka and K. Yoshimura, Phys. Rev. B 89 (2014)054413.
Phase transitions and hydrogen bonding in deuterated calcium hydroxide: High-pressure and high-temperature neutron
diffraction measurements: R. Iizuka, K. Komatsu, H. Kagi, T. Nagai, A. Sano-Furukawa, T. Hattori, H. Gotou and T.
Yagi, J. Solid State Chem. 218 (2014) 95.
Pressure-induced oligomerization of benzene at room temperature as a precursory reaction of amorphization: A.
Shinozaki, K. Mimura, H. Kagi, K. Komatu, N. Noguchi and H. Gotou, J. Chem. Phys. 141 (2014) 084306.
Spin Polarization Measurements of Heusler Alloy Ru0.2Fe1.8CrSi by Andreev Reflection Technique: I. Shigeta, Y.
Maeda, K. Harumori, Y. Nishisako, M. Ito, T. Yamauchi and M. Hiroi, IEEE Trans. Magn. 50 (2014) 1.

† Joint research with outside partners.

ISSP Activity Report 2014

165

†

8.

Magnetic properties of SmCo5−xFex (x=0–4) melt-spun ribbon: T. Saito and D. Nishio-Hamane, J. Alloys Compd. 585(2014) 423.

9.

†Electrochemical properties of LiMnxFe1−xPO4 (x = 0, 0.2, 0.4, 0.6, 0.8 and 1.0)/vapor grown carbon fiber core–sheath
composite nanowire synthesized by electrospinning method: K. Kagesawa, E. Hosono, M. Okubo, D. Nishio-Hamane,
T. Kudo and H. Zhou, J. Power Sources 248 (2014) 615.

10. †Electrically Conductive and Mechanically Elastic Titanium Nitride Ceramic Microsprings: S. Yang, X. Chen, K.
Yamamoto, M. Iitake, D. Nishio-Hamane, H. Sakai and M. Abe, J. Nanosci. Nanotech. 14 (2014) 4292.
11. Structural discrimination of double-walled carbon nanotubes by chiral diporphyrin nanocalipers: G. Liu, Y. Saito, D.
Nishio-Hamane, A. K. Bauri, E. Flahaut, T. Kimura and N. Komatsu, J. Mater. Chem. A 2 (2014) 19067.
12. Adachiite, a Si–poor member of the tourmaline supergroup from the Kiura mine, Oita Prefecture, Japan: D. Nishio–
Hamane, T. Minakawa, J. Yamaura, T. Oyama, M. Ohnishi and N. Shimobayashi, J. Miner. Petrol. Sci. 109 (2014) 74.
13. Iwateite, Na2BaMn(PO4)2, a new mineral from the Tanohata mine, Iwate Prefecture, Japan: D. Nishio-Hamane, T.
Minakawa and H. Okada, J. Miner. Petrol. Sci. 109 (2014) 34.
14. Spin transition, substitution, and partitioning of iron in lower mantle minerals: K. Fujino, D. Nishio-Hamane, T. Nagai,
Y. Seto, Y. Kuwayama, M. Whitaker, H. Ohfuji, T. Shinmei and T. Irifune, Phys. Earth Planet. In. 228 (2014) 186.
15. Ultrafast hydrothermal synthesis of Pr-doped Ca0.6Sr0.4TiO3 red phosphor nanoparticles using corrosion resistant microfluidic devices with Ti-lined structure under high-temperature and high-pressure condition: K. Sue, T. Ono, Y. Hakuta,
H. Takashima, D. Nishio-Hamane, T. Sato, M. Ohara, M. Aoki, Y. Takebayashi, S. Yoda, T. Hiaki and T. Furuya, Chem.
Eng. J. 239 (2014) 360.
16. Magnetic properties of Sm-Fe-N bulk magnets prepared from Sm2Fe17N3 melt-spun ribbons: T. Saito and D. NishioHamane, J. Appl. Phys. 117 (2015) 17D130.
17. *Superconductivity in 122-type antimonide BaPt2Sb2: M. Imai, S. Ibuka, N. Kikugawa, T. Terashima, S. Uji, T. Yajima,
H. Kageyama and I. Hase, Phys. Rev. B 91 (2015) 014513.
18. Effect of surfactant/water ratio and reagents’ concentration on size distribution of manganese carbonate nanoparticles
synthesized by microemulsion mediated route: G. Granata, F. Pagnanelli, D. Nishio-Hamane and T. Sasaki, Appl. Surf.
Sci. 331 (2015) 463.
19. New hard magnetic phase in Mn–Ga–Al system alloys: T. Saito and D. Nishio-Hamane, J. Alloys Compd. 632 (2015)486.
20. *Substrate-induced anion rearrangement in epitaxial thin films of LaSrCoO4−xHx: G. Bouilly, T. Yajima, T. Terashima,
Y. Kususe, K. Fujita, C. Tassel, T. Yamamoto, K. Tanaka, Y. Kobayashi and H. Kageyama, CrystEngComm 16 (2015)
9669-9674.
21. *Superconducting properties of BaTi2Pn2O (Pn = Sb, Bi): T. Yajima, K. Nakano, Y. Nozaki and H. Kageyama, Physica
C: Superconductivity 504 (2015) 36-38.
22. Synthesis of oxamate and urea by oxidative single and double carbonylation of amines using immobilized palladium
metal-containing ionic liquid@SBA-15: S. T. Gadge, E. N. Kusumawati, K. Harada, T. Sasaki, D. Nishio-Hamane andB. M. Bhanage, J. Mol. Catal. A: Chem. 400 (2015) 170.
23. Synthesis of Polyester Amide by Carbonylation–Polycondensation Reaction Using Immobilized Palladium Metal
Containing Ionic Liquid on SBA-15 as a Phosphine-Free Catalytic System: A. Satapathy, S. T. Gadge, E. N.
Kusumawati, K. Harada, T. Sasaki, D. Nishio-Hamane and B. M. Bhanage, Catal. Lett. 145 (2015) 824.

Neutron Science Laboratory
Shibayama group
Shibayama group has been exploring the structure and dynamics of soft matter, especially polymer gels, micelles, and phenolic
resin, utilizing a combination of small-angle neutron scattering (SANS), neutron spin echo (NSE), and dynamic light scattering(DLS). The objectives are to elucidate the mysterious relationship between the structure and variety of novel properties/functions of polymer gels/resins. The highlights of 2013 include structural investigations of (1) Poly(ethylene glycol) in ionicliquids, (2) UCST-type phase separation of poly(N-isopropylacrylamide) in ionic liquids, (3) catalyst ink of fuel cell, (4) defect* Joint research among groups within ISSP.

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ISSP Activity Report 2014

controlled polymer networks, and so on. We also developed a dynamic light scattering microscope capable of accessing opaquesamples with high spatial resolution, which sheds a light for investigations of particle dynamics and characterization in dense
systems.
1.

Gelation and cross-link inhomogeneity of phenolic resins studied by small- and wide-angle X-ray scattering and
1H-pulse NMR spectroscopy: A. Izumi, T. Nakao and M. Shibayama, Polymer 59 (2014) 226-233.

2.

Water-in-Ionic Liquid Microemulsion Formation in Solvent Mixture of Aprotic and Protic Imidazolium-Based Ionic
Liquids: T. Kusano, K. Fujii, K. Hashimoto and M. Shibayama, Langmuir 30 (2014) 11890-11896.

3.

Kinetic Aspect on Gelation Mechanism of Tetra-PEG Hydrogel: K. Nishi, K. Fujii, Y. Katsumoto, T. Sakai and M.
Shibayama, Macromolecules 47 (2014) 3274-3281.

4.

Multiscale Dynamics of Inhomogeneity-Free Polymer Gels: T. Hiroi, M. Ohl, T. Sakai and M. Shibayama, Macromolecules 47 (2014) 763.

5.

Small-Angle Neutron Scattering Study on Defect-Controlled Polymer Networks: K. Nishi, H. Asai, K. Fujii, Y.-S. Han,
T.-H. Kim, T. Sakai and M. Shibayama, Macromolecules 47 (2014) 1801.

6.

SANS および SAXS によるフェノール樹脂硬化物の構造解析 : 和泉 篤士 , 中尾 俊夫 , 岩瀬 裕希 , 柴山 充弘 , 波紋 24(2014) 11-14.
7.

CO2 Separation Using High-toughness Ion Gel with Tetraarmed olymer Network: K. Fujii, T. Makino, K. Hashimoto, T.
Sakai, M. Kanakubo and M. Shibayama, Chem. Lett. 44 (2014) 17-19.

8.

Self-Oscillating Vesicles: Spontaneous Cyclic Structural Changes of Synthetic Diblock Copolymers: R. Tamate, T. Ueki,
M. Shibayama and R. Yoshida, Angew. Chem. Int. Ed. 53 (2014) 11248-11252.

9.

中性子散乱を用いた構造解析手法

概説とエラストマー・高分子ゲル解析への応用 : 柴山 充弘 , ゴム協会編 (2014) 1-10.

10. SANS studies on catalyst ink of fuel cell: M. Shibayama, T. Matsunaga, T. Kusano, K. Amemiya, N. Kobayashi and T.
Yoshida, J. Appl. Polym. Sci. 131 (2014) 1-7.
11. Gelation Mechanism of Tetra-Armed Poly(ethylene glycol) in Aprotic Ionic Liquid Containing Non-volatile Proton
Source, Protic Ionic Liquid: K. Hashimoto, K. Fujii, K. Nishi, T. Sakai, N. Yoshimoto, M. Morita and M. Shibayama, J.
Phys. Chem. B 119 (2015) 4795-4801.
12. Dynamic light scattering study on curing mechanisms of novolac-type phenolic resins: Y. Shudo, A. Izumi, T. Takeuchi,
T. Nakao and M. Shibayama, Polym. J. (2015), in print.
13. 中性子小角散乱を用いた分子集合体の解析 : 草野 巧巳 , 柴山 充弘 , Colloid & Interface Communication 39 (2014)16-18.
14. Computer simulation of network formation in natural rubber (NR): T. Nakao and S. Kohjiya, in: Chemistry, Manufacture and Applications of Natural Rubber, Kohjiya S. and Ikeda, Y. Eds., edited by S. Kohjiya and Y. Ikeda, (Woodhead,
Cambridge, UK, 2014), 216-246.

Yoshizawa groupA systematic study on spin dynamics in a two-dimensional transition-metal Ni oxide has been carried out with use of the highresolution chopper spectrometer installed at BL12 in the Material and Life Science Facility, J-PARC. The checkerboard-typespin-charge ordering in the highly hole-doped region of the layered nickelate was studied in detail. The nature of the excitation
spectra and the thermodynamic properties in the checkerboard phase was found to show qualitative differences from those in
the stripe phase. Magnetic structures and spin fluctuations in a few quantum spin systems as well as Ce-based heavy Fermion
systems were also studied.
1.

Magnetic structure of the conductive triangular-lattice antiferromagnet PdCrO2: H. Takatsu, G. Nénert, H. Kadowaki, H.
Yoshizawa, M. Enderle, S. Yonezawa, Y. Maeno, J. Kim, N. Tsuji, M. Takata, Y. Zhao, M. Green and C. Broholm, Phys.
Rev. B 89 (2014) 104408.

2.

Dynamical Properties of Spins and Holes in Carrier Doped Quantum Haldane Chain: T. Yokoo, S. Itoh, D. Kawana, H.
Yoshizawa and J. Akimitsu, J. Phys.: Conf. Ser. 502 (2014) 012045.

3.

Spin and Hole Dynamics in Carrier-Doped Quantum Haldane Chain: T. Yokoo, S. Itoh, S. Ibuka, H. Yoshizawa and J.
Akimitsu, J. Phys.: Conf. Ser. 568 (2014) 042035.

4.

Neutron Diffraction Study of Parasitic Nd-Moment Order in the Checkerboard-Type Phase Nd1.3Sr0.7NiO4: R.
† Joint research with outside partners.

ISSP Activity Report 2014

167

Kobayashi, H. Yoshizawa, M. Matsuda, R. Kajimoto, K. Ishizaka and Y. Tokura, J. Phys. Soc. Jpn. 84 (2015) 064711.
5.

Resistance Anomalies Accompanying Crossover from Heavy-Fermion Regime to Intermediate-Valence Regime: A
Study of Cu–Ni Substitution and Pressure Effects on CeCu2Si2: Y. Ikeda, Y. Ito, S. Araki, T. C. Kobayashi and H.
Yoshizawa, J. Phys. Soc. Jpn. 84 (2015) 024702.

6.

Transport and Thermodynamic Studies of Stripe and Checkerboard Ordering in Layered Nickel Oxides R2−xSrxNiO4(R = La and Nd): Y. Ikeda, S. Suzuki, T. Nakabayashi, H. Yoshizawa, T. Yokoo and S. Itoh, J. Phys. Soc. Jpn. 84 (2015)
023706.

7.

*

8.

Characterization of Ferromagnetic Order in CePd2P2: Y. Ikeda, H. Yoshizawa, S. Konishi, S. Araki, T. C. Kobayashi, T.
Yokoo and S. Itoh, J. Phys.: Conf. Ser. 592 (2015) 012013.

Temperature and composition phase diagram in the iron-based ladder compounds Ba1−xCsxFe2Se3: T. Hawai, Y.
Nambu, K. Ohgushi, F. Du, Y. Hirata, M. Avdeev, Y. Uwatoko, Y. Sekine, H. Fukazawa, J. Ma, S. Chi, Y. Ueda, H.
Yoshizawa and T. J. Sato, Phys. Rev. B 91 (2015) 184416.

Yamamuro group
Our laboratory is studying chemical physics of complex condensed matters by using neutron scattering, X-ray diffraction,
calorimetric, dielectric, and viscoelastic techniques. Our target materials are glasses, liquids, and various disordered systems.
This year, there were two important outcomes in the study of nano-particles of palladium hydrides. The neutron powder diffraction experiment of nano-PdD has demonstrated that D atoms are located not only at the octahedral sites of the fcc lattice of Pd
but also at the tetrahedral sites probably due to the surface and/or distortion effects of nano-particles. The quasielastic neutron
scattering experiment of nano-PdH has revealed a new relaxation, which has much smaller activation energy than that in bulk
PdH. This relaxation could be due to the jump of H atoms among the tetrahedral sites. One more important topic is that our
low-temperature (3 K) vapor-deposition method has produced glassy carbon dioxide that is the simplest molecular glass in thehistory of the glass study. Other than above topics, we have made some progresses in the studies on liquid-crystalline ionicliquids and rare-earth metal-based single molecule magnets.
1.

†

2.

イミダゾリウム系イオン液体の不均一ダイナミクス : 古府 麻衣子 , 山室 修 , 波紋 24 (2014) 126-131.

3.

Proton Dynamics of Two Dimensional Oxalate-Bridged Coordination Polymers: S. Miyatsu, M. Kofu, A. Nagoe, T.
Yamada, M. Sadakiyo, T. Yamada, H. Kitagawa, M. Tyagi, V. Garcia Sakai and O. Yamamuro, Phys. Chem. Chem. Phys.
16 (2014) 17295-17304.

4.

Thermal and Structural Studies of Imidazolium-Based Ionic Liquids with and without Liquid-Crystalline Phases: The
Origin of Nanostructure: F. Nemoto, M. Kofu and O. Yamamuro, J. Phys. Chem. B 119 (2015) 5028-5034.

5.

Inelastic neutron scattering study on boson peaks of imidazolium-based ionic liquids: M. Kofu, Y. Inamura, Y. Moriya,
A. Podlesnyak, G. Ehlers and O. Yamamuro, J. Mol. Liq. (2015), accepted for publication.

6.

連載講座「中性子散乱による原子・分子のダイナミクスの観測」III-2 中性子非弾性散乱法による固体表面での分子分光 :山室 修 , 古府 麻衣子 , RADIOISOTOPES 63 (2014) 453-459.

7.

中性子散乱で観たイオン液体の階層的構造とダイナミクス : 山室 修 , 根本 文也 , 古府 麻衣子 , 高圧力学会誌 25 (2015),

Relationship between the local dynamics and gas permeability of polyacetylenes containing polymethylated indan/
tetrahydronaphtalene moieties: R. Inoue, T. Kanaya, Y. Hu, T. Masuda, K. Nishida and O. Yamamuro, Polymer 55(2014) 182-186.

in print.

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; multiferroic property in integer spin systems with large single-ion anisotropy, low temperaturemagnetic properties of frustrated quantum spin system Rb2Cu2Mo3O12, spin gap in antiferromagnetic alternating spin 3/2 chain
substances RCrGeO5 (R=Y or 154Sm), and Inhomogeneous ordering in weakly coupled Heisenberg S=1/2 chains with random
bonds.
†*

1.

Experimental confirmation of spin gap in antiferromagnetic alternating spin-3/2 chain substances RCrGeO5(R=Y or
Sm-154) by inelastic neutron scattering experiments: M. Hase, M. Soda, T. Masuda, D. Kawana, T. Yokoo, S. Itoh, A.
Matsuo, K. Kindo and M. Kohno, Phys. Rev. B 90 (2014) 024416.

2.

Inhomogeneous ordering in weakly coupled Heisenberg S=1/2 chains with random bonds: M. Thede, T. Haku, T.
* Joint research among groups within ISSP.

168

ISSP Activity Report 2014

Masuda, C. Baines, E. Pomjakushina, G. Dhalenne, A. Revcolevschi, E. Morenzoni and A. Zheludev, Phys. Rev. B 90
(2014) 144407.
3.

Spin-Nematic Interaction in the Multiferroic Compound Ba2CoGe2O7: M. Soda, M. Matsumoto, M. Mansson, S. OhiraKawamura, K. Nakajima, R. Shiina and T. Masuda, Phys. Rev. Lett. 112 (2014) 127205.

4.

†*

5.

Theoretical Study on Multiferroic Properties in Integer Spin Systems with Large Single-Ion Anisotropy: M. Matsumoto,
M. Soda and T. Masuda, JPS Conf. Proc. 3 (2014) 014033.

6.

Complex magnetostructural order in the frustrated spinel LiInCr4O8: G. J. Nilsen, Y. Okamoto, T. Masuda, J. Rodriguez-Carvajal, H. Mutka, T. Hansen and Z. Hiroi, Phys. Rev. B 91 (2015) 174435.

7.

マルチフェロイック物質 Ba2CoGe2O7 におけるスピン・ネマティック相互作用の観測 : 益田 隆嗣 , 左右田 稔 , 固体物理

Low Temperature Magnetic Properties of Frustrated Quantum Spin Chain System Rb2Cu2Mo3O12: Y. Yasui, R.
Okazaki, I. Terasaki, M. Hase, M. Hagihala, T. Masuda and T. Sakakibara, JPS Conf. Proc. 3 (2014) 014014 (1-6).

50 (2015) 111.

8.

A magnetic anti-cancer compound for magnet-guided delivery and magnetic resonance imaging: H. Eguchi, M.
Umemura, R. Kurotani, H. Fukumura, I. Sato, J.-H. Kim, Y. Hoshino, J. Lee, N. Amemiya, M. Sato, K. Hirata, D. J.
Singh, T. Masuda, M. Yamamoto, T. Urano, K. Yoshida, K. Tanigaki, M. Yamamoto, M. Sato, S. Inoue, I. Aoki and Y.
Ishikawa, Sci. Rep. 5 (2015) 9194.

International MegaGauss Science Laboratory
Takeyama group
Recently, the technique for the electro-magnetic flux compression at the International Megagauss Science Laboratory is wellestablished and a peak magnetic field more than 700 T is reproducibly generated with the peak field almost approaching to
800 T. We have developed a calculation code, which is used for dynamical simulation of the magnetic-flux compression. This
simulation assists comprehension of the time and 3 dimensional special distribution of magnetic field inside the imploding liner,
and very useful for further development for achieving 1000 T. The exciton-magnon optical absorption spectra in HgCr2O4 wasinvestigated in various magnetic phases up to the full saturation, and compared with other preceding results of the lattice and theelectron-spin-resonance measurements. The existence of the novel phase, most possibly the spin nematic phase, prior to the fullsaturation is suggested. This phase is very similar to that discovered in other chromium spinel oxide, CdCr2O4, and ZnCr2O4.
We have found that relative ordering between optical bright and dark band-edge excitons is chirality dependent in semiconductor single wall carbon nanotubes, and a bright exciton can stay at the lowest energy for a certain chirality carbon nanotube.
1.

Canted 2:1:1 Magnetic Supersolid Phase in a Frustrated Magnet MgCr2O4 as a Small Limit of the Biquadratic Spin
Interaction: A. Miyata, H. Ueda and S. Takeyama, J. Phys. Soc. Jpn. 83 (2014) 063702(1-4).

2.

Optical Detection of Magnetic Orders in HgCr2O4 Frustrated Spin Magnet under Pulsed High Magnetic Fields: D.
Nakamura, A. Miyata, Y. Aida, H. Ueda and S. Takeyama, J. Phys. Soc. Jpn. 83 (2014) 113703(1-3).

3.

*

4.

Negative initial phase shift of Kerr rotation generated from the building-up process of resident electron spin polarization
in a CdTe single quantum well: L. -P. Yan, M. Kurosawa, R. Kaji, G. Karczewski, S. Takeyama and S. Adachi, Phys.
Rev. B 90 (2014) 205307(1-6).

5.

Note: Experimental evidence of three-dimensional dynamics of an electromagnetically imploded liner: D. Nakamura, H.
Sawabe and S. Takeyama, Rev. Sci. Instrum. 85 (2014) 036102.

6.

†*

7.

†*

Entropy of the quantum soliton lattice and multiple magnetization steps in BiCu2PO6: Y. Kohama, K. Mochidzuki, T.
Terashima, A. Miyata, A. DeMuer, T. Klein, C. Marcenat, Z. L. Dun, H. Zhou, G. Li, L. Balicas, N. Abe, Y. H. Matsuda,
S. Takeyama, A. Matsuo and K. Kindo, Phys. Rev. B 90 (2014) 060408(1-4).

Novel Phase of Solid Oxygen Induced by Ultrahigh Magnetic Fields: T. Nomura, Y. H. Matsuda, S. Takeyama, A.
Matsuo, K. Kindo, J. L. Her and T. C. Kobayashi, Phys. Rev. Lett. 112 (2014) 247201 (5 pages).
固体酸素の超強磁場誘起新規相 : 野村 肇宏 , 松田 康弘 , 嶽山 正二郎 , 小林 達生 , 固体物理 Vol. 49, No. 12 (2014)

687-694.
8.

†*

Optical anisotropy and diamagnetic energy shifts in InP–GaP lateral quantum wells: Y. H. Shin, Y. Kim, J. D. Song, Y.
T. Lee, H. Saito, D. Nakamura, Y. H. Matsuda and S. Takeyama, Journal of Luminescence 151 (2014) 244-246.

† Joint research with outside partners.

ISSP Activity Report 2014

169

9.

*

Development of Techniques for Radio Frequency Conductivity Experiments in Ultra High Magnetic Fields: S. Lee, Y.
H. Matsuda, D. Nakamura, S. Takeyama, T.-H. Arima and S. Yamada, JPS Conf. Proc. 3 (2014) 013009 (6 pages).

10. Relative Ordering between Bright and Dark Excitons in Single-walled Carbon Nanotubes: W. Zhou, D. Nakamura, H.
Liu, H. Kataura and S. Takeyama, Scientific Reports 4 (2014) 6999.
11. †*Orbital Zeeman Effect of Liquid Oxygen in High Magnetic Fields: T. Nomura, Y. H. Matsuda, S. Takeyama, A.
Matsuo, K. Kindo and T. C. Kobayashi, J. Phys. Soc. Jpn. Conf. Proc. 3 (2014) 017004(1-6).
12. *Magnetic-Field-Induced Insulator–Metal Transition in (Pr1−yYy)0.7Ca0.3CoO3 at Ultrahigh Magnetic Fields: S. Lee, Y.
H. Matsuda, T. Naito, D. Nakamura and S. Takeyama, J. Phys. Soc. Jpn. 84 (2015) 044703 (5pages).
13. Exciton splitting in semiconducting carbon nanotubes in ultrahigh magnetic fields above 300 T: D. Nakamura, T. Sasaki,
W. Zhou, H. Liu, H. Kataura and S. Takeyama, Phys. Rev. B 91 (2015) 235427.
14. *Effect of very high magnetic field on the optical properties of firefly light emitter oxyluciferin: W. Zhou, D. Nakamura,
Y. Wang, T. Mochizuki, H. Akiyama and S. Takeyama, Journal of Luminescence 165 (2015) 15.

Kindo group
The heat capacity measurement by using long pulsed field with duration of about 1 sec has been opened for outer user. Newly
manufactured Cu-Ag wire shows reliability and long life which enables to carry out 75 T measurement with short pulse
duration.
1.

†

2.

†

3.

Exchange Interactions of the Chromium Spinel Oxide HgCr2O4 in High Magnetic Fields Examined by the Magnetoelastic Theory: S. Kimura, M. Hagiwara, T. Takeuchi, H. Yamaguchi, H. Ueda and K. Kindo, J. Phys. Soc. Jpn. 83(2014) 113709.

4.

†

5.

†*

6.

†

7.

†

8.

†*

9.

†

Almost Perfect Frustration in the Dimer Magnet Ba2CoSi2O6Cl2: H. Tanaka, N. Kurita, M. Okada, E. Kunihiro, Y.
Shirata, K. Fujii, H. Uekusa, A. Matsuo, K. Kindo and H. Nojiri, J. Phys. Soc. Jpn. 83 (2014) 103701.
Collapse of Anisotropic Hybridization Gap below 20 K in Kondo Semiconductor CeFe2Al10 by Pressure and Magnetic
Field: H. Tanida, M. Nakamura, M. Sera, A. Kondo, K. Kindo, T. Nishioka and M. Matsumura, J. Phys. Soc. Jpn. 83(2014) 084708.

Field-Induced Spin-State Transition in LaCo1−xMxO3 (M = Al, Ga, Rh, and Ir): K. Sato, A. Matsuo, K. Kindo, Y. Hara,
K. Nakaoka, Y. Kobayashi and K. Asai, J. Phys. Soc. Jpn. 83 (2014) 114712.
NaCuMoO4(OH) as a Candidate Frustrated J1–J2 Chain Quantum Magnet: K. Nawa, Y. Okamoto, A. Matsuo, K.
Kindo, Y. Kitahara, S. Yoshida, S. Ikeda, S. Hara, T. Sakurai, S. Okubo, H. Ohta and Z. Hiroi, J. Phys. Soc. Jpn. 83(2014) 103702.
Spin Frustration and Field-Induced Transitions of Modified Pyrochlore Fluorides ACr2F6 (A = Rb and Cs): H. Ueda, A.
Matsuo, K. Kindo and K. Yoshimura, J. Phys. Soc. Jpn. 83 (2014) 014701(1-6).
Spin-Singlet Ground State of Two-Dimensional Quantum Spin Antiferromagnet (CuCl)Ca2Nb3O10: Y. Tsujimoto, A.
Kitada, M. Nishi, Y. Narumi, K. Kindo, T. Goko, Y. J. Uemura, A. A. Aczel, T. J. Williams, G. M. Luke, Y. Ajiro and H.
Kageyama, J. Phys. Soc. Jpn. 83 (2014) 074712.
Successive Magnetic Transitions of Ca2CoSi2O7 in High Magnetic Fields: M. Akaki, H. Kuwahara, A. Matsuo, K.
Kindo and M. Tokunaga, J. Phys. Soc. Jpn. 83 (2014) 093704(1-4).
Anomalous itinerant-electron metamagnetic transition in the layered Sr1−xCaxCo2P2 system: M. Imai, C. Michioka, H.
Ohta, A. Matsuo, K. Kindo, H. Ueda and K. Yoshimura, Phys. Rev. B 90 (2014) 014407.

10. *Entropy of the quantum soliton lattice and multiple magnetization steps in BiCu2PO6: Y. Kohama, K. Mochidzuki, T.
Terashima, A. Miyata, A. DeMuer, T. Klein, C. Marcenat, Z. L. Dun, H. Zhou, G. Li, L. Balicas, N. Abe, Y. H. Matsuda,
S. Takeyama, A. Matsuo and K. Kindo, Phys. Rev. B 90 (2014) 060408(1-4).
11. †*Experimental confirmation of spin gap in antiferromagnetic alternating spin-3/2 chain substances RCrGeO5(R=Y or
Sm-154) by inelastic neutron scattering experiments: M. Hase, M. Soda, T. Masuda, D. Kawana, T. Yokoo, S. Itoh, A.
Matsuo, K. Kindo and M. Kohno, Phys. Rev. B 90 (2014) 024416.
12. †Observation of two ferromagnetic phases in Fe3Mo3N: T. Waki, S. Terazawa, Y. Tabata, K. Sato, A. Kondo, K. Kindo
and H. Nakamura, Phys. Rev. B 90 (2014) 014416.
13. † Unconventional spin freezing in the highly two-dimensional spin-l/2 kagome antiferromagnet* Joint research among groups within ISSP.

170

ISSP Activity Report 2014

Cd2Cu3(OH)6(SO4)24H2O: Evidence of partial order and coexisting spin singlet state on a distorted kagome lattice:
M. Fujihala, X.-G. Zheng, H. Morodomi, T. Kawae, A. Matsuo, K. Kindo and I. Watanabe, Phys. Rev. B 89 (2014)
100401(1-5).
14. †*Novel Phase of Solid Oxygen Induced by Ultrahigh Magnetic Fields: T. Nomura, Y. H. Matsuda, S. Takeyama, A.
Matsuo, K. Kindo, J. L. Her and T. C. Kobayashi, Phys. Rev. Lett. 112 (2014) 247201 (5 pages).
15. †High-magnetic-field phase transitions and H–T phase diagram of the Kagome-staircase compound Ni3V2O8: Z. Q.
Lin, M. Yang, H. W. Wang, Q. Guo, Y. J. Liu, X. T. Han, Y. B. Han, J. F. Wang, Z. Z. He and K. Kindo, J. Magn. Magn.
Mater. 382 (2015) 7.
16. †Successive magnetic phase transitions in α-RuCl3: XY-like frustrated magnet on the honeycomb lattice: Y. Kubota, H.
Tanaka, T. Ono, Y. Narumi and K. Kindo, Phys. Rev. B 91 (2015) 094422.
17. †Valence-specific magnetization of the charge-ordered multiferroelectric LuFe2O4 using soft x-ray magnetic circulardichroism under 30 T pulsed high magnetic fields: Y. Narumi, T. Nakamura, K. Saito, T. Morioka, Y. Fukada, T. Kambe,
N. Ikeda, Y. Kotani, T. Kinoshita, K. Kindo and H. Nojiri, Phys. Rev. B 91 (2015) 014410.
18. †*Anisotropy in the upper critical field of FeSe and FeSe0.33Te0.67 single crystals: J. L. Her, Y. Kohama, Y. H. Matsuda,
K. Kindo, W.-H. Yang, D. A. Chareev, E. S. Mitrofanova, O. S. Volkova, A. N. Vasiliev and J.-Y. Lin, Supercond. Sci.
Technol. 28 (2015) 045013 (6 pages).
19. †*Synchrotron X-ray spectroscopy study on the valence state and magnetization in α-YbAl1-xFexB4 (x = 0.115) at low
temperatures and high magnetic fields: T. Terashima, Y. H. Matsuda, K. Kuga, S. Suzuki, Y. Matsumoto, S. Nakatsuji, A.
Kondo, K. Kindo, N. Kawamura, M. Mizumaki and T. Inami, J. Phys.: Conf. Ser. 592 (2015) 012020 (6 pages).

Tokunaga group
With using the measurement technique developed in the previous year, we studied the inverse magneto-caloric effects (IMCEs)
in metamagnetic shape-memory alloys NiCoMnIn. We quantitatively estimated the contribution of magnetic, lattice, and charge
degrees of freedom to the IMCEs, and revealed that the lattice sector played the dominant role in these phenomena.
1.

†*

2.

Anisotropic Upper Critical Field of BiS2-Based Superconductor LaO0.5F0.5BiS2: Y. Mizuguchi, A. Miyake, K. Akiba, M.
Tokunaga, J. Kajitani and O. Miura, Phys. Rev. B 89 (2014) 174515(1-7).

3.

Direct measurements of inverse magnetocaloric effects in metamagnetic shape-memory alloy NiCoMnIn: T. Kihara, X.
Xu, W. Ito, R. Kainuma and M. Tokunaga, Phys. Rev. B 90 (2014) 214409(1-6).

4.

Novel multiferroic phase of CsCuCl3 in High Magnetic Fields: J. Shibuya, M. Akaki, Y. Kohama, A. Miyake, M.
Tokunaga and H. Tanaka, J. Phys.: Conf. Ser. 568 (2014) 042030(1-5).

5.

Magnetic Field-Induced Reverse Martensitic Transformation and Thermal Transformation Arrest Phenomenon of
Ni41Co9Mn39Sb11 Alloy: R. Umetsu, X. Xu, W. Ito, T. Kihara, K. Takahashi, M. Tokunaga and R. Kainuma, Metals 4(2014) 609-622.

6.

Possible Excitonic Phase of Graphite in the Quantum Limit State: K. Akiba, A. Miyake, H. Yaguchi, A. Matsuo, K.
Kindo and M. Tokunaga, J. Phys. Soc. Jpn. 84 (2015) 054709(1-6).

7.

Magnetic control of transverse electric polarization in BiFeO3: M. Tokunaga, M. Akaki, T. Ito, S. Miyahara, A. Miyake,
H. Kuwahara and N. Furukawa, Nat. Commun. 6 (2015) 5878(1-5).

8.

High field studies on BiFeO3 single crystals grown by the laser-diode heating floating zone method: M. Tokunaga, M.
Akaki, A. Miyake, T. Ito and H. Kuwahara, Journal of Magnetism and Magnetic Materials 383 (2015) 259-261.

Successive Magnetic Transitions of Ca2CoSi2O7 in High Magnetic Fields: M. Akaki, H. Kuwahara, A. Matsuo, K.
Kindo and M. Tokunaga, J. Phys. Soc. Jpn. 83 (2014) 093704/1-4.

Y. Matsuda group
A novel phase of solid oxygen was discovered in ultrahigh magnetic fields of up to 193 T. The phase transition is expected tobe driven by rearrangement of oxygen molecules. The nearest neighbor molecules are coupled with the parallel H-geometry
at low magnetic fields and the exchange interaction is antiferromagnetic. The H-geometry becomes unstable at high magnetic
fields owing to its antiferromagnetic exchange interaction and a new geometry is likely to realize so that the exchange coupling
becomes ferromagnetic. The cubic crystal symmetry is most plausible for the novel phase that we term θ phase. Other thansolid oxygen, heavy fermion compounds such as YbAlB4 and CeRh2Si2 were investigated in pulsed high magnetic fields. A† Joint research with outside partners.

ISSP Activity Report 2014171

small metamagnetic transition was observed in YbAlB4 and the origin of the transition can be the valence change of Yb. As for
CeRh2Si2, a field-induced valence change of Ce at around 25 T was directly observed by X-ray absorption spectroscopy done at
SPring-8. In order to realize the electrical transport measurement in destructive magnetic fields over 100 T, a contactless radio
frequency technique was developed. Magnetic-field-induced insulator-metal transition of Pr0.6Ca0.4MnO3 was successfully
observed in pulsed fields up to 80 T produced by the single-turn coil method.
1.

*

2.

†*

3.

†*

Entropy of the quantum soliton lattice and multiple magnetization steps in BiCu2PO6: Y. Kohama, K. Mochidzuki, T.
Terashima, A. Miyata, A. DeMuer, T. Klein, C. Marcenat, Z. L. Dun, H. Zhou, G. Li, L. Balicas, N. Abe, Y. H. Matsuda,
S. Takeyama, A. Matsuo and K. Kindo, Phys. Rev. B 90 (2014) 060408(1-4).
Novel Phase of Solid Oxygen Induced by Ultrahigh Magnetic Fields: T. Nomura, Y. H. Matsuda, S. Takeyama, A.
Matsuo, K. Kindo, J. L. Her and T. C. Kobayashi, Phys. Rev. Lett. 112 (2014) 247201 (5 pages).
固体酸素の超強磁場誘起新規相 : 野村 肇宏 , 松田 康弘 , 嶽山 正二郎 , 小林 達生 , 固体物理 Vol. 49, No. 12 (2014)

687-694.
4.

†*

5.

*

6.

Valence State in Ce-based Heavy Fermion Compounds at High Magnetic Fields: Y. H. Matsuda, J.-L. Her, S.
Michimura, T. Inami, T. Ebihara and H. Amitsuka, JPS Conf. Proc. 3 (2014) 011044 (6 pages).

7.

†*

8.

*

9.

*

Optical anisotropy and diamagnetic energy shifts in InP–GaP lateral quantum wells: Y. H. Shin, Y. Kim, J. D. Song, Y.
T. Lee, H. Saito, D. Nakamura, Y. H. Matsuda and S. Takeyama, Journal of Luminescence 151 (2014) 244-246.
Development of Techniques for Radio Frequency Conductivity Experiments in Ultra High Magnetic Fields: S. Lee, Y.
H. Matsuda, D. Nakamura, S. Takeyama, T.-H. Arima and S. Yamada, JPS Conf. Proc. 3 (2014) 013009 (6 pages).

Orbital Zeeman Effect of Liquid Oxygen in High Magnetic Fields: T. Nomura, Y. H. Matsuda, S. Takeyama, A.
Matsuo, K. Kindo and T. C. Kobayashi, J. Phys. Soc. Jpn. Conf. Proc. 3 (2014) 017004(1-6).
Magnetization of Yb-based mixed-valent compounds at megagauss fields: T. Terashima, Y. H. Matsuda, K. Kuga, Y.
Matsumoto and S. Nakatsuji, J. Phys. Conf. Proc. 3 (2014) 011027(1-5).
Magnetic-Field-Induced Insulator–Metal Transition in (Pr1−yYy)0.7Ca0.3CoO 3 at Ultrahigh Magnetic Fields: S. Lee, Y.
H. Matsuda, T. Naito, D. Nakamura and S. Takeyama, J. Phys. Soc. Jpn. 84 (2015) 044703 (5pages).

10. †*Anisotropy in the upper critical field of FeSe and FeSe0.33Te0.67 single crystals: J. L. Her, Y. Kohama, Y. H. Matsuda,
K. Kindo, W.-H. Yang, D. A. Chareev, E. S. Mitrofanova, O. S. Volkova, A. N. Vasiliev and J.-Y. Lin, Supercond. Sci.
Technol. 28 (2015) 045013 (6 pages).
11. † 超強磁場で誘起される固体酸素の新しい相 : 松田 康弘 , パリティ 30 (2015) 48-51.
12. †*Synchrotron X-ray spectroscopy study on the valence state and magnetization in α-YbAl1-xFexB4 (x = 0.115) at low
temperatures and high magnetic fields: T. Terashima, Y. H. Matsuda, K. Kuga, S. Suzuki, Y. Matsumoto, S. Nakatsuji, A.
Kondo, K. Kindo, N. Kawamura, M. Mizumaki and T. Inami, J. Phys.: Conf. Ser. 592 (2015) 012020 (6 pages).

Center of Computational Materials Science
Akai group(1) In order to seek better permanent magnet materials, the mechanisms that govern the magnetic anisotropy, magnetisation, andthe Curie temperature were investigated. For typical permanent magnet materials Nd2Fe17B and Sm2Fe17N3, the local magnetic
moments, hyperfine fields, the magnetic exchange couplings, the magnetic anisotropy energy are calculated within the density
functional theory using all-eletron KKR Green's function method. The importance of hybridisation between the 4f states ofrare earth elements and N and B are pointed out. (2)New scheme of calculating Keldysh Green's function in the framework of
KKR Green's function was proposed and successfully applied to some test cases. The method open up a possibility to deal with
non-equlibrium process in the framework of KKR all -electron scheme. (3)Extension of the optimised effective potential method(OEP) so as to include the correlation of RPA level was developed together with some reformulation of OEP that as it stood had
shown ill behaviour for spin polarised cases.
1.

Ab initio study of 59Co NMR spectra in Co2FeAl1−xSix Heusler alloys: H. Nishihara, K. Sato, H. Akai, C. Takiguchi, M.
Geshi, T. Kanomata, T. Sakon and T. Wada, Physica B 485 (2015) 66-70.

2.

Optimized effective potential method and application to a static RPA correlation: T. Fukazawa and H. Akai, J. Phys.:
Condens. Matter 27 (2015) 115502(1-10).

* Joint research among groups within ISSP.

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ISSP Activity Report 2014

3.

Formulation of the augmented plane-wave and muffin-tin orbital method: T. Kotani, H. Kino and H. Akai, J. Phys. Soc.
Jpn. 84 (2015) 034701(1-9(.

4.

The metamagnetic behavior and giant inverse magnetocaloric effect in Ni–Co–Mn– (Ga, In, Sn) Heusler alloys: P. Entel,
V. V. Sokolovskiy, V. D. Buchelnikov, M. Ogura, M. E. Gruner, A. Gruenebohm, D. Comtesse and H. Akai, J. Magn.
Magn. Mater. 385 (2015) 193-197.

5.

Role of N in permeant magnet materials Sm2Fe17Nx: M. Ogura, A. Mashiyama and H. Akai, J. Phys. Soc. Jpn. (2015),
in print.

6.

Basic and applications of Moessbauer spectrometry and the electronics structure of matters: H. Akai, ISOTOPES 63(2014) 163-174.

7.

鉄の事典 : 赤井 久純 , ( 朝倉書店 , 東京 , 2014).

Ozaki group
Although it is believed that two-dimensional honeycomb structures consisting of silicon atoms do not exist experimentally due
to relative instability of its hybridized sp2 orbitals, a recent experiment clearly demonstrates that silicene, honeycomb structureof silicon atoms, can be fabricated on ZrB2 (0001) thin films. We have performed detailed studies on geometrical and electronic
structures of silicene on ZrB2 and a related two-dimensional structure by means of electronic structure calculations based on
density functional theories (DFT), guided by a close collaboration with experimental groups. Theoretical chemical shift of Si-2p
states and band structure calculations strongly support the formation of silicene having a planar-like structure. The stability ofthe planar-like structure over the regularly buckled structure can be understood by interaction between states of the silicene andsurface states consisting of the d-orbital of the top Zr atoms. We have also proposed a possible mechanism for the formation of
the domain structure of silicene on ZrB2. It is inferred that the domain structure is induced by an instability of a phonon having
a nearly zero frequency, and is formed in such a way that the k-points having the zero frequency can be removed from the first
Brillouin zone. The mechanism is verified by performing large-scale total energy calculations. We have further explored apossible structure of multi-layer silicene, and find that the MoS2 structure consisting of silicon atoms is stabilized with atoms in
the inner layer having a sixfold coordination, which results in cigar-shaped nematic orbitals originating from the Si-sp2 orbitals.
1.

Systematic study of electronic and magnetic properties for Cu12-xTMxSb4S13 (TM= Mn, Fe, Co, Ni, and Zn) tetrahedrite: K. Suekuni, Y. Tomizawa, T. Ozaki and M. Koyano, J. Appl. Phys. 115 (2014) 143702.

2.

Avoiding critical-point phonon instabilities in two-dimensional materials: The origin of the stripe formation in epitaxial
silicene: C. -C. Lee, A. Fleurence, R. Friedlein, Y. Yamada-Takamura and T. Ozaki, Phys. Rev. B 90 (2014) 241402(R).

3.

Band structure of silicene on zirconium diboride (0001) thin-film surface: Convergence of experiment and calculationsin the one-Si-atom Brillouin zone: C. -C. Lee, A. Fleurence, Y. Yamada-Takamura, T. Ozaki and R. Friedlein, Phys. Rev.
B 90 (2014) 075422.

4.

Competing magnetism in π-electrons in graphene with a single carbon vacancy: C. -C. Lee, Y. Yamada-Takamura and T.
Ozaki, Phys. Rev. B 90 (2014) 014401.

5.

Diverse forms of bonding in two-dimensional Si allotropes: Nematic orbitals in the MoS2 structure: F. Gimbert, C. -C.
Lee, R. Friedlein, A. Fleurence, Y. Yamada-Takamura and T. Ozaki, Phys. Rev. B 90 (2014) 165423.

6.

Microscopic origin of the π states in epitaxial silicene: A. Fleurence, Y. Yoshida, C. -C. Lee, T. Ozaki, Y. YamadaTakamura and Y. Hasegawa, Appl. Phys. Lett. 104 (2014) 021605.

7.

Strain effects on the magnetic anisotropy of Y2Fe14B examined by first-principles calculations: Z. Torbatian, T. Ozaki,
S. Tsuneyuki and Y. Gohda, Appl. Phys. Lett. 104 (2014) 242403.

8.

A method of orbital analysis for large-scale first-principles simulations: T. Ohwaki, M. Otani and T. Ozaki, J. Chem.
Phys. 140 (2014) 244105.

9.

First-principles electronic transport calculations of graphene nanoribbons on SiO2/Si: H. Jippo, T. Ozaki and M.
Ohfuchi, Appl. Phys. Express 7 (2014) 025101.

10. A decomposition method with minimum communication amount for parallelization of multi-dimensional FFTs: T. V. T.
Duy and T. Ozaki, Comput. Phys. Commun. 185 (2014) 153.
11. A three-dimensional domain decomposition method for large-scale DFT electronic structure calculations: T. V. T. Duy
and T. Ozaki, Comput. Phys. Commun. 185 (2014) 777.

† Joint research with outside partners.

ISSP Activity Report 2014173

Laser and Synchrotron Research Center
Suemoto group(1) Coherent control and observation of spin dynamics by using terahertz (THz) wave: The spin orientation during the spin
reorientation transition was precisely determined in an orthoferrite Dy0.7Er0.3FeO3 by THz TDS (time domain spectroscopy) andthe advantage of this method over a standard SQUID measurement was demonstrated. By using a high intensity THz source,
instantaneous non-linear response was found in ErFeO3. (2) THz spectroscopy for d-electron dynamics: Behavior of photogenerated d-electrons in MnO was investigated by optical-pump-THz-probe spectroscopy and the relaxation path to magnetic
self-trapped exciton was suggested, comparing with luminescence measurement. (3) Ultrafast time-resolved luminescence
spectroscopy: Luminescence dynamics was studied in graphenes and the importance of Fermi energy to the hot electron relaxation was shown. Femtosecond infrared luminescence was firstly observed in semimetals (Bi, Sb) and in a topological insulator(TlBiSe2). (4) Single-shot soft x-ray imaging: A single-shot soft-x-ray microscope with a Fresnel's zone plate was constructed
and a good performance with a spatial resolution of 200 nm was demonstrated.
1.

†

2.

†

Nonlinear photoluminescence properties of trions in hole-doped single-walled carbon nanotubes: N. Akizuki, M.
Iwamura, S. Mouri, Y. Miyauchi, T. Kawasaki, H. Watanabe, T. Suemoto, K. Watanabe, K. Asano and K. Matsuda, Phys.
Rev. B 89 (2014) 195432.

3.

†

4.

*

5.

†

6.

*

7.

*

8.

†

Submicron scale image observation with a grazing incidence reflection-type single-shot soft X-ray microscope: M.
Baba, M. Nishikino, N. Hasegawa, T. Tomita, Y. Minami, R. Takei, M. Yamagiwa, T. Kawachi and T. Suemoto, Jpn J.
App. Phys. 53 (2014) 080302.

9.

†

Enhanced spin-precession dynamics in a spin-metamaterial coupled resonator observed in terahertz time-domain
measurements: T. Kurihara, K. Nakamura, K. Yamaguchi, Y. Sekine, Y. Saito, M. Nakajima, K. Oto, H. Watanabe and T.
Suemoto, Phys. Rev. B 90 (2014) 144408(1-5).

Ultrafast dynamics of photoinduced semiconductor-to-metal transition in optical switching nano-oxide Ti3O5: A.
Asahara, H. Watanabe, H. Tokoro, S. Ohkoshi and T. Suemoto, Phys. Rev. B 90 (2014) 014303(1-7).
Gain-switching dynamics in optically pumped single-mode InGaN vertical-cavity surface-emitting lasers: S. Chen, A.
Asahara, T. Ito, J. Zhang, B. Zhang, T. Suemoto, M. Yoshita and H. Akiyama, Optics Express 22 (2014) 4196-4201.
Domain growth and aggregation dynamics in photo-induced phase transition phenomena: H. Watanabe, S. Ishige, A.
Asahara, H. Tokoro, S. Ohkoshi and T. Suemoto, J. Lumin 152 (2014) 108-111.
Direct generation of 2-ps blue pulses from gain-switched InGaN VCSEL assessed by up-conversion technique: A.
Asahara, S. Chen, T. Ito, M. Yoshita, W. Liu, B. Zhang, T. Suemoto and H. Akiyama, Sci. Rep. 4 (2014) 6401.
Spectral dynamics of picosecond gain-switched pulses from nitride-based vertical-cavity surface-emitting lasers: S.
Chen, T. Ito, A. Asahara, M. Yoshita, W. Liu, J. Zhang, B. Zhang, T. Suemoto and H. Akiyama, Sci. Rep. 4 (2014) 4325.

Time-Resolved Soft X-Ray Imaging of Femtosecond Laser Ablation Processes on MetalsTomita: M. Nishikino, N.
Hasegawa, Y. Minami, R. Takei, M. Baba, T. Eyama, S. Takayoshi, T. Kaihori, T. Morita, Y. Hirano, T. Kawachi, M.
Yamagiwa and T. Suemoto, J. Laser Micro Nanoengineering 9 (2014) 137-142.

10. †High-frequency millimeter wave absorption of indium-substituted epsilon-Fe2O3 spherical nanoparticles: M. Yoshikiyo,
A. Namai, M. Nakajima, K. Yamaguchi, T. Suemoto and S. Ohkoshi, J. App. Phys. 15 (2014) 172613.
11. †Ultraviolet stimulated emission from high-temperature-annealed MgO microcrystals at room temperature: H. Soma, Y.
Uenaka, A. Asahara, T. Suemoto and T. Uchino, Appl. Phys. Lett. 106 (2015) 041116(1-5).

Shin group
We studied high Tc Fe-pnictide superconductors using 7-eV laser. High resolution photoemission study with polarization dependence is very powerful for the study of the superconducting mechanism. Orbital fluctuation mechanism is also important inaddition to the spin fluctuation mechanism.
1.

Electronic structure of CeCuAs2: A. Chainani, M. Matsunami, M. Taguchi, R. Eguchi, Y. Takata, M. Oura, S. Shin,
K. Sengupta, E. V. Sampathkumaran, Th. Doert, Y. Senba, H. Ohashi, K. Tamasaku, Y. Kohmura, M. Yabashi and T.
Ishikawa, Phys. Rev. B 89 (2014) 235117.

2.

*

Evidence for excluding the possibility of d-wave superconducting-gap symmetry in Ba-doped KFe2As2: Y. Ota, K.
Okazaki, Y. Kotani, T. Shimojima, W. Malaeb, S. Watanabe, C. -T. Chen, K. Kihou, C. H. Lee, A. Iyo, H. Eisaki, T.
Saito, H. Fukazawa, Y. Kohori and S. Shin, Phys. Rev. B 89 (2014) 081103(1-5).

* Joint research among groups within ISSP.

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3.

†*

4.

†*

5.

*

6.

†*

7.

*

8.

*

9.

Selective Probing of the OH or OD Stretch Vibration in Liquid Water Using Resonant Inelastic Soft-X-Ray Scattering:
Y. Harada, T. Tokushima, Y. Horikawa, O. Takahashi, H. Niwa, M. Kobayashi, M. Oshima, Y. Senba, H. Ohashi, KT.
Wikfeldt, A. Nilsson, LGM. Pettersson and S. Shin, Phys. Rev. Lett. 111 (2014) 193001(1-5).

Evidence of a universal relation between electron-mode coupling and Tc in Ba1-xKxFe2As2 superconductor from laser
angle-resolved photoemission spectroscopy: W. Malaeb, T. Shimojima, Y. Ishida, T. Kondo, K. Okazaki, Y. Ota, K.
Ohgushi, K. Kihou, C. H. Lee, A. Iyo, H. Eisaki, S. Ishida, M. Nakajima, S. Uchida, H. Fukazawa, T. Saito, Y. Kohori
and S. Shin, Phys. Rev. B 90 (2014) 195124(1-6).
Observation of a giant Kerr rotation in a ferromagnetic transition metal by M-edge resonant magneto-optic Kerr effect:
Sh. Yamamoto, M. Taguchi, M. Fujisawa, R. Hobara, S. Yamamoto, K. Yaji, T. Nakamura, K. Fujikawa, R. Yukawa, T.
Togashi, M. Yabashi, M. Tsunoda, S. Shin and I. Matsuda, Phys. Rev. B 89 (2014) 064423(1-6).
Pseudogap formation above the superconducting dome in iron pnictides: T. Shimojima, T. Sonobe, W. Malaeb, K.
Shinada, A. Chainani, S. Shin, T. Yoshida, S. Ideta, A. Fujimori, H. Kumigashira, K. Ono, Y. Nakashima, H. Anzai, M.
Arita, A. Ino, H. Namatame, M. Taniguchi, M. Nakajima, S. Uchida, Y. Tomioka, T. Ito, K. Kihou, C. H. Lee, A. Iyo,
H. Eisaki, K. Ohgushi, S. Kasahara, T. Terashima, H. Ikeda, T. Shibauchi, Y. Matsuda and K. Ishizaka, Phys. Rev. B 89
(2014) 045101(1-10).
Ultrafast photoinduced transition of an insulating VO2 thin film into a nonrutile metallic state: R. Yoshida, T.
Yamamoto, Y. Ishida, H. Nagao, T. Otsuka, K. Saeki, Y. Muraoka, R. Eguchi, K. Ishizaka, T. Kiss, S. Watanabe, T.
Kanai, J. Itatani and S. Shin, Phys. Rev. B 89 (2014) 205114(1-7).
Time-resolved photoemission apparatus achieving sub-20-meV energy resolution and high stability: Y. Ishida, T.
Togashi, K. Yamamoto, M. Tanaka, T. Kiss, T. Otsu, Y. Kobayashi and S. Shin, Rev. Sci. Instrum. 85 (2014) 123904(19).
Robust Protection from Backscattering in the Topological Insulator Bi1.5Sb0.5Te1.7Se1.3: S. Kim, S. Yoshizawa, Y.
Ishida, K. Eto, K. Segawa, Y. Ando, S. Shin and F. Komori, Phys. Rev. Lett. 112 (2014) 136802(1-5).

10. レーザー光電子分光による分子性導体の電子構造の観測 : 石坂 香子 , 小泉 健二 , 木須 孝幸 , 辛 埴 , 固体物理 49 (2014)
153-162.
11. †*Observing hot carrier distribution in an n-type epitaxial graphene on a SiC substrate: T. Someya, H. Fukidome,
Y. Ishida, R. Yoshida, T. Iimori, R. Yukawa, K. Akikubo, Sh. Yamamoto, S. Yamamoto, T. Yamamoto, T. Kanai, K.
Funakubo, M. Suemitsu, J. Itatani, F. Komori, S. Shin and I. Matsuda, Appl. Phys. Lett. 104 (2014) 161103(1-4).
12. †*Solvation dependence of valence electronic states of water diluted in organic solvents probed by soft X-ray spectroscopy: T. Tokushima, Y. Horikawa, O. Takahashi, H. Arai, K. Sadakane, Y. Harada, Y. Takata and S. Shin, Phys. Chem.
Chem. Phys. 16 (2014) 10753-10761.
13. *Superconductivity in an electron band just above the Fermi level: possible route to BCS-BEC superconductivity: K.
Okazaki1, Y. Ito, Y. Ota, Y. Kotani, T. Shimojima, T. Kiss, S. Watanabe, C. -T. Chen, S. Niitaka, T. Hanaguri, H. Takagi,
A. Chainani and S. Shin, Sci. Rep. 4 (2014) 4109(1-6).
14. Development of a single-shot CCD-based data acquisition system for time-resolved X-ray photoelectron spectroscopy atan X-ray free-electron laser facility: M. Oura, T. Wagai, A. Chainani, J. Miyawaki, H. Sato, M. Matsunami, R. Eguchi,
T. Kiss, T. Yamaguchi, Y. Nakatani, T. Togashi, T. Katayama, K. Ogawa, M. Yabashi, I. Y. Tanaka, Y. Kohmura, K.
Tamasaku, S. Shin and T. Ishikawa, J.Syn.Rad. 21 (2014) 183-192.
15. The electronic structure of carbonate ion in aqueous solution studied by soft X-ray emission spectroscopy: Y. Horikawa
A. Yoshida, O. Takahashi, H. Araia, T. Tokushima, T. Gejo and S. Shin, J.Mol.Liq 189 (2014) 9-12.
16. †*New soft X-ray beamline BL07LSU at SPring-8: S. Yamamoto, Y. Senba, T. Tanaka, H. Ohashi, T. Hirono, H. Kimura,
M. Fujisawa, J. Miyawaki, A. Harasawa, T. Seike, S. Takahashi, N. Nariyama, T. Matsushita, M. Takeuchi, T. Ohata, Y.
Furukawa, K. Takeshita, S. Goto, Y. Harada, S. Shin, H. Kitamura, A. Kakizaki, M. Oshima and I. Matsuda, J Synchrotron Rad 21 (2014) 352-365.
17. Observation of quadrupole helix chirality and its domain structure in DyFe3(BO3)4: T. Usui, Y. Tanaka, H. Nakajima,
M. Taguchi, A. Chainani, M. Oura, S. Shin, N. Katayama, H. Sawa, Y. Wakabayashi and T. Kimura, Nature materials 13(2014) 611-618.
18. Ultrahigh-spatial-resolution chemical and magnetic imaging by laser-based photoemission electron microscopy: T.
taniuchi, Y. Kotani and S. Shin, Rev. Sci. Instrum. 86 (2015) 023701.
19. *Emergent photovoltage on SmB6 surface upon bulk-gap evolution revealed by pump-and-probe photoemission
spectroscopy: Y. Ishida, T. Otsu, T. Shimada, M. Okawa, Y. Kobayashi, F. Iga, Y. Takabatake and S. Shin, Sci. Rep. 5† Joint research with outside partners.

ISSP Activity Report 2014175

(2015) 8160(1-6).
20. * 鉄タンパク質の電子状態と機能 : 原田 慈久 , 辛 埴 , ( 朝倉書店「鉄の事典」, 3.11.d 節 , 2014).

Takahashi group
We have been studying the structure and phase transition of surfaces and interfaces with diffraction techniques. Atomic structure and electronic transport properties of Cu-doped topological insulator Bi2Se3 thin-films were investigated by surface X-ray
diffraction and magnetotransport measurements. It is reported that Cu-doped Bi2Se3 bulk crystals show superconductivity at low
temperature below 4 K. But the thin-film samples never showed superconductivity. This suggests that such bulk crystals contain
impurity sub-phases responsible to superconductivity. On the other hand, we investigated the surface structure of Si(111)5x2-Au, a typical prototype of one dimensional structure, that has not been solved for a long time since its first observation by
LEED in 1969. We have experimentally determined the atomic structure without ambiguity with an aid of a holographic methodin surface X-ray diffraction.
1.

†

2.

†

3.

Identification of the Structure Model of the Si(111)-(5×2)-Au Surface: T. Shirasawa, W. Voegeli, T. Nojima, Y. Iwasawa,
Y. Yamaguchi and T. Takahashi, Phys. Rev. Lett. 113 (2014) 165501(1-4).

4.

†*

5.

†

Structure and transport properties of Cu doped Bi2Se3 films: T. Shirasawa, M. Sugiki, T. Hirahara, M. Aitani, T. Shirai,
S. Hasegawa and T. Takahashi, Phys. Rev. B 89 (2014) 195311(1-6).
Structure determination of multilayer silicene grown on Ag(111) films by electron diffraction: Evidence for Ag segregation at the surface: T. Shirai, T. Shirasawa, T. Hirahara, N. Fukui, T. Takahashi and S. Hasegawa, Phys. Rev. B 89
(2014) 241403(R)(1-5).

Scanning tunneling microscopic and spectroscopic studies on a crystalline silica monolayer epitaxially formedon hexagonal SiC(000-1) surfaces: H. Tochihara, T. Shirasawa, T. Suzuki, T. Miyamachi, T. Kajiwara, K. Yagyu, S.
Yoshizawa, T. Takahashi, S. Tanaka and F. Komori, Appl. Phys. Lett. 104 (2014) 051601(1-4).
Determination of atomic positions in silicene on Ag(111) by low-energy electron diffraction: K. Kawahara, T. Shirasawa, R. Arafune, C. -L. Lin, T. Takahashi, M. Kawai and N. Takagi, Surf. Sci. 623 (2014) 25-28.

Akiyama group
In 2014, we developed experimental study on subcells diagnosis in a multi-junction solar cell via absolute electroluminescenceefficiency measurements, on the basis of a detailed-balance or reciprocity relation. Collaborations on GaAs quantum wells
pumped by an intense single-cycle terahertz pulse were also developed. We studied spectral dynamics in pico-second shortpulse generation via gain switching in InGaN VCSELs and double-core-slab-waveguide semiconductor lasers for end opticalpumping. We studied temperature dependence of quantitative green and orange/red emission intensities in firefly bioluminescence, and made intensive studies on theoretical quantum-chemistry calculations on luciferins and oxyluciferins.
1.

Mode imaging and loss evaluation of semiconductor waveguides: T. Mochizuki, C. Kim, M. Yoshita, T. Nakamura, H.
Akiyama, L. N. Pfeiffer and K. W. West, Rev. Sci. Instrum. 85 (2014) 053109.

2.

Impact of Sub-cell Internal Luminescence Yields on Energy Conversion Efficiencies of Tandem Solar Cells: A designprinciple: L. Zhu, C. Kim, M. Yoshita, S. Chen, S. Sato, T. Mochizuki, H. Akiyama and Y. Kanemitsu, Appl. Phys. Lett.
104 (2014) 031118.

3.

Robust red-emission spectra and yields in firefly bioluminescence against temperature changes: T. Mochizuki, Y. Wang,
M. Hiyama and H. Akiyama, Appl. Phys. Lett. 104 (2014) 213704.

4.

Spectroscopic Study of Firefly Oxyluciferin in an Enzymatic Environment on the Basis of Stability Monitoring: Y.
Wang, Y. Hayamizu and H. Akiyama, J. Phys. Chem. B 118 (2014) 2070–2076.

5.

†*

6.

ホタル生物発光と物理 : 秋山 英文 , 望月 敏光 , 樋山 みやび , 日本物理学会誌 69 (2014) 218.

7.

*

8.

Analysis of Photoexcitation Energy Dependence in the Photoluminescence of Firefly Luciferin: M. Hiyama, H.
Akiyama, T. Mochizuki, K. Yamada and N. Koga, Photochem. Photobiol. 90 (2014) 820-828.

First-Principles Investigation on Rydberg excitations of Firefly Luciferin Anion in Vacuum: Y. Noguchi, M. Hiyama,
H. Akiyama and N. Koga, J. Chem. Phys. 141 (2014) 044309.

Gain-switching dynamics in optically pumped single-mode InGaN vertical-cavity surface-emitting lasers: S. Chen, A.
Asahara, T. Ito, J. Zhang, B. Zhang, T. Suemoto, M. Yoshita and H. Akiyama, Optics Express 22 (2014) 4196-4201.

* Joint research among groups within ISSP.

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9.

Atomically Engineered Metal-Insulator Transition at the TiO2/LaAlO3 Heterointerface: M. Minohara, T. Tachikawa, Y.
Nakanishi, Y. Hikita, L. F. Kourkoutis, J.-S. Lee, C.-C. Kao, M. Yoshita, H. Akiyama, C. Bell and H. Y. Hwang, Nano
Lett. 14 (11) (2014) 6743-6746.

10. Gain switching of a double-core-waveguide semiconductor laser via traveling-wave optical pumping: H. Nakamae, T.
Nakamura, T. Ito, T. Mochizuki, C. Kim, S. Chen, M. Yoshita and H. Akiyama, Appl. Phys. Express 7 (2014) 062701.
11. *Direct generation of 2-ps blue pulses from gain-switched InGaN VCSEL assessed by up-conversion technique: A.
Asahara, S. Chen, T. Ito, M. Yoshita, W. Liu, B. Zhang, T. Suemoto and H. Akiyama, Sci. Rep. 4 (2014) 6401.
12. *Spectral dynamics of picosecond gain-switched pulses from nitride-based vertical-cavity surface-emitting lasers: S.
Chen, T. Ito, A. Asahara, M. Yoshita, W. Liu, J. Zhang, B. Zhang, T. Suemoto and H. Akiyama, Sci. Rep. 4 (2014) 4325.
13. Balance sheets of energy and carriers and subcell characteristics in a InGaP/GaAs/Ge tandem solar cell: S. Chen, L.
Zhu, M. Yoshita, T. Mochizuki, C. Kim, H. Akiyama, M. Imaizumi and Y. Kanemitsu, Photovoltaic Specialists Conference Proceedings IEEE 40th (2014) 1780-1783.
14. Conversion efficiency limits and optimized designs for tandem solar cells with realistic sub-cell material quality: L. Zhu,
T. Mochizuki, M. Yoshita, S. Chen, S. Sato, C. Kim, H. Akiyama and Y. Kanemitsu, Photovoltaic Specialists Conference
Proceedings IEEE 40th (2014) 3404-3408.
15. Time-resolved photoluminescence measurements for determining voltage-dependent charge-separation efficiencies ofsubcells in triple-junction solar cells: D. M. Tex, T. Ihara, H. Akiyama, M. Imaizumi and Y. Kanemitsu, Appl. Phys. Lett.
106 (2015) 013905.
16. 多接合太陽電池の診断・設計と発光絶対値・発光量子効率の評価 : 秋山 英文 , 応用物理 84 (2015) 319-325.
17. Multi-junction-solar-cell designs and characterizations based on detailed-balance principle and luminescence yields: H.
Akiyama, L. Zhu, M. Yoshita, C. Kim, S. Chen, T. Mochizuki and Y. Kanemitsu, Proc. SPIE 9358 (2015) 93580B1-8.
18. Time-resolved observation of excitonic dynamics under coherent terahertz excitation in GaAs quantum wells: K.
Uchida, H. Hirori, T. Aoki, C. Wolpert, K. Tanaka, T. Mochizuki, C. Kim, M. Yoshita, H. Akiyama, L. N. Pfeiffer and K.
W. West, Proc. SPIE 9361 (2015) 93611L1-6.
19. Analysis of Oxyluciferin Photoluminescence Pathways in Aqueous Solutions: M. Hiyama, T. Mochizuki, H. Akiyama
and N. Koga, Photochem. Photobiol. 91 (2015) 74.
20. *Effect of very high magnetic field on the optical properties of firefly light emitter oxyluciferin: W. Zhou, D. Nakamura,
Y. Wang, T. Mochizuki, H. Akiyama and S. Takeyama, Journal of Luminescence 165 (2015) 15.
21. On the importance of cavity-length and heat dissipation in GaN-based vertical-cavity surface-emitting lasers: W. J. Liu,
X. L. Hu, L. Y. Ying, S. Q. Chen, J. Y. Zhang, H. Akiyama, Z. P. Cai and B. P. Zhang, Sci. Rep. 5 (2015) 9600.
22. Thorough subcells diagnosis in a multi-junction solar cell via absolute electroluminescence-efficiency measurements: S.
Chen, L. Zhu, M. Yoshita, T. Mochizuki, C. Kim, H. Akiyama, M. Imaizumi and Y. Kanemitsu, Sci. Rep. 5 (2015) 7836.
23. *First-Principles Investigation of Strong Excitonic Effects in Oxygen 1s X-ray Absorption Spectra: Y. Noguchi, M.
Hiyama, H. Akiyama, Y. Harada and N. Koga, J. Chem. Theory Comput. 11 (2015) 1668-1673.
24. Strong localization effect and carrier relaxation dynamics in self-assembled InGaN quantum dots emitting in the green:
G.-E. Weng, W.-R. Zhao, S.-Q. Chen, H. Akiyama, Z.-C. Li, J.-P. Liu and B.-P. Zhang, Nanoscale Res. Lett. 10 (2015)31.
25. *Vibronic Structures in Absorption and Fluorescence Spectra of Firefly Oxyluciferin in Aqueous Solutions: M. Hiyama,
Y. Noguchi, H. Akiyama, K. Yamada and N. Koga, Photochem Photobiol (2015) published online, in print.

I. Matsuda group
Developments and experiments of the advanced spectroscopies have been carried out by using vacuum ultraviolet (VUV) andsoft X-rays (SX). At SPring-8 BL07LSU, we have adjusted phase shifters with electromagnetic coils of the segmented crosstype undulator in the electron storage ring to realize fast switching of the light polarizations. At the end-station, we routinely
supported picosecond-time-resolved SX photoemission spectroscopy experiments of joint-researches. Studies of photovoltaics
and photocatalysis have been carried out mainly. As a new experimental tool for investigating spin dynamics, we have continued
development of the rotating analyzer ellipsometry method for measuring the resonant magneto-optical Ker effect (RMOKE)
using VUV and SX rays. Using a seeded free-electron laser at FERMI@ELETTRA in Italy, we have succeeded in tracing thephoto-induced femtoseconds-spin-flipping in the ferrimagnetic material by RMOKE.
† Joint research with outside partners.

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1.

Anisotropic electronic conduction in metal nanofilms grown on a one-dimensional surface superstructure: N. Nagamura,
R. Hobara, T. Uetake, T. Hirahara, K. Kobayashi, I. Matsuda and S. Hasegawa, Phys. Rev. B 89 (2014) 125415-1,-5.

2.

†*

3.

Electron-hole recombination on ZnO(0001) single-crystal surface studied by time-resolved soft X-ray photoelectron
spectroscopy: R. Yukawa, S. Yamamoto, K. Ozawa, M. Emori, M. Ogawa, Sh. Yamamoto, K. Fujikawa, R. Hobara, S.
Kitagawa, H. Daimon, H. Sakama and I. Matsuda, Appl. Phys. Lett. 105 (2014) 151602-1,-4.

4.

†*

5.

Non-linear kinetic model for oscillatory relaxation of the photovoltage effect on a Si(111)7x7 surface: M. Ogawa, R. -Y.
Liu, C. -H. Lin, S. Yamamoto, R. Yukawa, R. Hobara, S. -J. Tang and I. Matsuda, Surf. Sci. 624 (2014) 70-75.

6.

反射高速陽電子回折（RHEPD）による Ag(111) 表面上のシリセンの構造決定 : 深谷 有喜 , 望月 出海 , 前川 雅樹 , 和
田 健 , 兵頭 俊夫 , 松田 巌 , 河裾 厚男 , PF News 32 (2014) 10-14.

7.

表面電子化合物 : 松田 巌 , 深谷 有喜 , PF News 31 (2014) 33-37.

8.

†

9.

Rashba effects within the space charge layer of a semiconductor: C.-H. Lin, T.-R. Chang, Ro. -Ya. Liu, C.-M. Cheng,
K.-D. Tsuei, H. -T. Jeng, C.-Y. Mou, I. Matsuda and S. -J. Tang, New. J. Phys. 16 (2014) 045003-1,-12.

Observation of a giant Kerr rotation in a ferromagnetic transition metal by M-edge resonant magneto-optic Kerr effect:
Sh. Yamamoto, M. Taguchi, M. Fujisawa, R. Hobara, S. Yamamoto, K. Yaji, T. Nakamura, K. Fujikawa, R. Yukawa, T.
Togashi, M. Yabashi, M. Tsunoda, S. Shin and I. Matsuda, Phys. Rev. B 89 (2014) 064423(1-6).

Observing hot carrier distribution in an n-type epitaxial graphene on a SiC substrate: T. Someya, H. Fukidome,
Y. Ishida, R. Yoshida, T. Iimori, R. Yukawa, K. Akikubo, Sh. Yamamoto, S. Yamamoto, T. Yamamoto, T. Kanai, K.
Funakubo, M. Suemitsu, J. Itatani, F. Komori, S. Shin and I. Matsuda, Appl. Phys. Lett. 104 (2014) 161103(1-4).

Electron–Hole Recombination Time at TiO2 Single-Crystal Surfaces: Influence of Surface Band Bending: K. Ozawa,M. Emori, S. Yamamoto, R. Yukawa, S. Yamamoto, R. Hobara, K. Fujikawa, H. Sakama and I. Matsuda, J. Phys. Chem.
Lett. 5 (2014) 1953-1957.

10. †*New soft X-ray beamline BL07LSU at SPring-8: S. Yamamoto, Y. Senba, T. Tanaka, H. Ohashi, T. Hirono, H. Kimura,
M. Fujisawa, J. Miyawaki, A. Harasawa, T. Seike, S. Takahashi, N. Nariyama, T. Matsushita, M. Takeuchi, T. Ohata, Y.
Furukawa, K. Takeshita, S. Goto, Y. Harada, S. Shin, H. Kitamura, A. Kakizaki, M. Oshima and I. Matsuda, J Synchrotron Rad 21 (2014) 352-365.
11. †*Development of an electromagnetic phase shifter using a pair of cut-core coils for a cross undulator: I. Matsuda, A.
Kuroda, J. Miyawaki, Y. Kosegawa, S. Yamamoto, T. Seike, T. Bizen, Y. Harada, T. Tanaka and H. Kitamura, Nucl.
Instrum. Methods Phys. Res. A 767 (2014) 296-299.
12. †Titanium-induced charge of Si(001) surface dependent on local configuration: K. Shudo, T. Aoki, S. Ohno, K.
Yamazaki, F. Nakayama, M. Tanaka, T. Okuda, A. Harasawa, I. Matsuda, T. Kakizaki and M. Uchiyama, J. Elec. Spec.
Rel, Phen. 192 (2014) 35.
13. 時間分解軟 X 線光電子分光法による表面キャリアダイナミクス研究の進展 : 山本 達 , 松田 巌 , 日本放射光学会誌 27 (2014)241.
14. *Scanning tunneling spectroscopy study of quasiparticle interference on dual topological insulator Bi 1-xSbx: S.
Yoshizawa, F. Nakamura, A. A. Taskin, T. Iimori, K. Nakatsuji, I. Matsuda, Y. Ando and F. Komori, Phys. Rev. B 91
(2015) 045423-1,-6.
15. †Experimental evidence for two-dimensional states localized in subsurface region in Ge(111): K. Yaji, Y. Ohtsubo, S.
Hatta, H. Okuyama, R. Yukawa, I. Matsuda, P. Le Fevre, F. Bertran, A. Taleb-Ibrahimi, A. Kakizaki and T. Aruga, J.
Elec. Spec. Rel. Phenom. (2014), in print.

Kobayashi group
We have demonstrated high-power high-harmonic generation from 30-m cavity. The obtained VUV coherent light had a comparable brightness to a synchrotron radiation. We are developing very-high repetition-rate mode-locked laser for astronomical
applications. Long-term stable optical frequency comb is also developing. We have stated to develop a mid-infrared opticalfrequency comb for medical applications.
1.

*

2.

*

Time-resolved photoemission apparatus achieving sub-20-meV energy resolution and high stability: Y. Ishida, T.
Togashi, K. Yamamoto, M. Tanaka, T. Kiss, T. Otsu, Y. Kobayashi and S. Shin, Rev. Sci. Instrum. 85 (2014) 123904(19).
Wavefront analysis of high-efficiency, large-scale, thin transmission gratings: C. Zhou, T. Seki, T. Kitamura, Y.
* Joint research among groups within ISSP.

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Kuramoto, T. Sukegawa, N. Ishii, T. Kanai, J. Itatani, Y. Kobayashi and S. Watanabe, Opt. Express 22 (2014) 5995-6008.
3.

デュアルコム分光 FT-IR にかわる高速広帯域精密分光 : 久世 直也 , 小澤 陽 , 小林 洋平 , 日本物理学会 69 (2014) 29.

4.

エンハンスメントキャビティー、フォトンリングを用いた高強度レーザー実現の試み : 小林 洋平 , プラズマ・核融合学会誌 第90 巻 8 号 (2014) 462-467.

5.

300-mW narrow-linewidth deep-ultraviolet light generation at 193 nm by frequency mixing between Yb-hybrid and
Er-fiber lasers: H. Xuan, Z. Zhao, H. Igarashi, S. Ito, K. Kakizaki and Y. Kobayashi, Opt. Express 23 (2015) 1056410572.

6.

Direct 15-GHz mode-spacing optical frequency comb with a Kerr-lens mode-locked Yb:Y2O3 ceramic laser: M. Endo, I.
Ito and Y. Kobayashi, Opt. Express 23 (2015) 1276-1282.

7.

*

Emergent photovoltage on SmB6 surface upon bulk-gap evolution revealed by pump-and-probe photoemission
spectroscopy: Y. Ishida, T. Otsu, T. Shimada, M. Okawa, Y. Kobayashi, F. Iga, Y. Takabatake and S. Shin, Sci. Rep. 5(2015) 8160(1-6).

8.

Development of compact and ultra-high-resolution spectrograph with multi-GHz optical frequency comb: M. Endo, T.
Sukegawa, A. Silva and Y. Kobayashi, in: Ground-based and Airborne Instrumentation for Astronomy V (Proc. SPIE
9147, 2014), 91477Y.

9.

Development of narrow-linewidth Yb- and Er- fiber lasers and frequency mixing for ArF excimer laser seeding: H.
Xuan, Z. Zhao, H. Igarashi, S. Ito, K. Kakizaki and Y. Kobayashi, in: Fiber Lasers XI: Technology, Systems, and Applications (Proc. SPIE 8961, 2014), 89612M.

Itatani group
We have continued to develop an infrared (IR) optical parametric chirped pulse amplifier (OPCPA) to produce coherent soft
X ray via high harmonic generation. Comparison between the observed carrier-envelope phase dependence of high harmonic
spectra and a quantum simulation suggested the generation of isolated attosecond pulses that covered the carbon K edge(~284
eV). This is an important milestone for realizing ultrafast soft-X-ray spectroscopy using laser-based light sources. The long-term
stability of the carrier-envelope phase of the IR OPCPA was examined by monitoring the high-energy photoelectron spectrain above-threshold ionization, revealing the excellent long-term passive stabilization up to 47 hours. The molecular control
experiments using intense THz pulses was extended to a novel double-pulse scheme. We successfully controlled the two-level
coherence that were probed by the velocity map technique. We also kept collaboration with Shin, Komori, and Matsuda groups
at LASOR-ISSP on time-resolved ARPES using a femtosecond EUV source. Several experiments on the ultrafast relaxation ofphoto-induced states in VO2 and graphene were successfully performed.
1.

†*

2.

†*

3.

高次高調波によるコヒーレント軟 X 線の発生とその応用 : 板谷 治郎 , 光学 43 (2014) 419-425.

4.

Selecting rotational two-level coherence in polar molecules by double terahertz pulses: K. Kitano, N. Ishii, T. Kanai and
J. Itatani, Phys. Rev. A 90 (2014) 041402(R)-1-5.

5.

Long-term passive stabilization of the carrier-envelope phase of an intense infrared few-cycle pulse source: H. Geiseler,
N. Ishii, K. Kaneshima, T. Kanai and J. Itatani, Appl. Phys. B 117 (2014) 941-946.

6.

High-energy half-cycle cutoffs in high harmonic and rescattered electron spectra using waveform-controlled few-cycle
infrared pulses: H. Geiseler, N. Ishii, K. Kaneshima, K. Kitano, T. Kanai and J. Itatani, J. Phys. B: At. Mol. Opt. Phys.
47 (2014) 204011-1-8.

7.

*

8.

Carrier-envelope phase-dependent high harmonic generation in the water window using few-cycle infrared pulses: N.
Ishii, K. Kaneshima, K. Kitano, T. Kanai, S. Watanabe and J. Itatani, Nat. Commun. 5 (2014) 3331.

9.

Ultrabroadband infrared chirped mirrors characterized by a white-light Michelson interferometer: K. Kaneshima, M.

Ultrafast photoinduced transition of an insulating VO2 thin film into a nonrutile metallic state: R. Yoshida, T.
Yamamoto, Y. Ishida, H. Nagao, T. Otsuka, K. Saeki, Y. Muraoka, R. Eguchi, K. Ishizaka, T. Kiss, S. Watanabe, T.
Kanai, J. Itatani and S. Shin, Phys. Rev. B 89 (2014) 205114(1-7).
Observing hot carrier distribution in an n-type epitaxial graphene on a SiC substrate: T. Someya, H. Fukidome,
Y. Ishida, R. Yoshida, T. Iimori, R. Yukawa, K. Akikubo, Sh. Yamamoto, S. Yamamoto, T. Yamamoto, T. Kanai, K.
Funakubo, M. Suemitsu, J. Itatani, F. Komori, S. Shin and I. Matsuda, Appl. Phys. Lett. 104 (2014) 161103(1-4).

Wavefront analysis of high-efficiency, large-scale, thin transmission gratings: C. Zhou, T. Seki, T. Kitamura, Y.
Kuramoto, T. Sukegawa, N. Ishii, T. Kanai, J. Itatani, Y. Kobayashi and S. Watanabe, Opt. Express 22 (2014) 5995-6008.

† Joint research with outside partners.

ISSP Activity Report 2014179

Sugiura, K. Tamura, N. Ishii and J. Itatani, Appl. Phys. B 119 (2015) 347-353.

Harada group
Soft X-ray absorption/emission spectroscopy in a real ambient condition is an urgent requisite since the ultrahigh vacuum
needed to transmit soft X-rays hampers the use of this unique method among various spectroscopies for a long time. Therefore, this is one of the major goals of our project. From 2013, we have developed a system for ambient pressure soft X-ray
emission spectroscopy using originally-developed differential pumping system. In 2014, we have introduced a co-axial sample
monitor and a beam profile monitor, which has facilitated the alignment of the apertures and a nozzle for differential pumping
to efficiently transmit incident soft X-rays to the sample. Finally we have enabled 10 orders of magnitude different pressure(from 10-5 Pa to 105 Pa) at only around 400 mm distance. As a demonstration we performed O 1s RIXS of H2O ice under thepressure around 10-1Pa. We also have introduced a system to apply a magnetic field on the sample up to 0.3 T. We have accepted
7 collaborative works at BL07LSU HORNET endstation, which are i) Observation of 100 meV-order multiphonon excitations
in Ti 2p RIXS of anatase TiO2, which reveals real bulk sensitive isotropic phonon modes for the first time; ii) Development ofdamage-free RIXS technique for highly valent manganese complex as a model manganese cluster for oxygen evolving complex
in photosystem II; iii) Study on the structure making/breaking characteristics of hydrated water around a series of hydrophobic
phase-transfer catalysts: TBA, TPA, TEA and TMA, which followed a general trend even in the electronic structure level fromstructure-breaking to structure-making as the size of the catalyst decreases; iv) MCD-RIXS experiments applying the 0.3 T
magnetic field, one is terfenol-D, the most famous magnetostrictive material and the other is half metal CrO2 which demonstrated a beautiful selection rule of dd excitations depending on the polarization of the incident photon due to fully spin-polarized HOMO state under the magnetic field; v) Operando Fe 2p RIXS spectroscopy of the cathode electrode LiFePO4 for lithium
ion batteries by characterizing electrochemical property.
1.

†

2.

†

Electronic Excitations of a Magnetic Impurity State in the Diluted Magnetic Semiconductor (Ga,Mn)As: M.
Kobayashi, H. Niwa, Y. Takeda, A. Fujimori, Y. Senba, H. Ohashi, A. Tanaka, S. Ohya, P. N. Hai, M. Tanaka, Y. Haradaand M. Oshima, Phys. Rev. Lett. 112 (2014) 107203(1-7).

3.

Reabsorption of Soft X-Ray Emission at High X-Ray Free-Electron Laser Fluences: S. Schreck, M. Beye, J. A. Sellberg,
T. McQueen, H. Laksmono, B. Kennedy, S. Eckert, D. Schlesinger, D. Nordlund, H. Ogasawara, R. G. Sierra, V. H.
Segtnan, K. Kubicek, W. F. Schlotter, G. L. Dakovski, S. P. Moeller, U. Bergmann, S. Techert, L. G. M. Pettersson, P.
Wernet, M. J. Bogan, Y. Harada, A. Nilsson and A. Föhlisch, Phys. Rev. Lett. 113 (2014) 153002(1-6).

4.

Spin and orbital magnetic moments of Fe in the n-type ferromagnetic semiconductor (In,Fe)As: M. Kobayashi, L. D.
Anh, P. N. Hai, Y. Takeda, S. Sakamoto, T. Kadono, T. Okane, Y. Saitoh, H. Yamagami, Y. Harada, M. Oshima, M.
Tanaka and A. Fujimori, Appl. Phys. Lett. 105 (2014) 032403(1-4).

5.

†*

6.

†

7.

†*

8.

Iron-Nitrogen Coordination in Modified Graphene Catalyzes a Four-Electron-Transfer Oxygen Reduction Reaction: K.
Kamiya, H. Koshikawa, H. Kiuchi, Y. Harada, M. Oshima, K. Hashimoto and S. Nakanishi, ChemElectroChem 1 (2014)877-884.

9.

†*Unveiling the impurity band induced ferromagnetism in the magnetic semiconductor (Ga,Mn)As: M. Kobayashi,
I. Muneta, Y. Takeda, Y. Harada, A. Fujimori, J. Krempaský, T. Schmitt, S. Ohya, M. Tanaka, M. Oshima and V. N.
Strocov, Phys. Rev. B 89 (2014) 205204(1-8).

Solvation dependence of valence electronic states of water diluted in organic solvents probed by soft X-ray spectroscopy: T. Tokushima, Y. Horikawa, O. Takahashi, H. Arai, K. Sadakane, Y. Harada, Y. Takata and S. Shin, Phys. Chem.
Chem. Phys. 16 (2014) 10753-10761.
Distinguishing between High- and Low-Spin States for Divalent Mn in Mn-Based Prussian Blue Analogue by HighResolution Soft X-ray Emission Spectroscopy: D. Asakura, Y. Nanba, M. Okubo, Y. Mizuno, H. Niwa, M. Oshima, H.
Zhou, K. Okada and Y. Harada, J. Phys. Chem. Lett. 5 (2014) 4008-4013.
New soft X-ray beamline BL07LSU at SPring-8: S. Yamamoto, Y. Senba, T. Tanaka, H. Ohashi, T. Hirono, H. Kimura,
M. Fujisawa, J. Miyawaki, A. Harasawa, T. Seike, S. Takahashi, N. Nariyama, T. Matsushita, M. Takeuchi, T. Ohata, Y.
Furukawa, K. Takeshita, S. Goto, Y. Harada, S. Shin, H. Kitamura, A. Kakizaki, M. Oshima and I. Matsuda, J Synchrotron Rad 21 (2014) 352-365.

Development of an electromagnetic phase shifter using a pair of cut-core coils for a cross undulator: I. Matsuda, A.
Kuroda, J. Miyawaki, Y. Kosegawa, S. Yamamoto, T. Seike, T. Bizen, Y. Harada, T. Tanaka and H. Kitamura, Nucl.
Instrum. Methods Phys. Res. A 767 (2014) 296-299.

10. †Multi-Phonon Excitations in Fe 2p RIXS on Mg2FeH6: K. Kurita, D. Sekiba, I. Harayama, K. Chito, Y. Harada, H.
Kiuchi, M. Oshima, S. Takagi, M. Matsuo, R. Sato, K. Aoki and S.-I. Orimo, J. Phys. Soc. Jpn. 84 (2015) 043201 1-3.
11. X-ray Emission Spectroscopy of Bulk Liquid Water in "No-man's Land": J. Sellberg, T. McQueen, H. Laksmono, S.
* Joint research among groups within ISSP.

180

ISSP Activity Report 2014

Schreck, M. Beye, D. DePonte, B. O'Kennedy, D. Nordlund, R. Sierra, D. Schlesinger, T. Tokushima, S. Eckert, V.
Segtnan, H. Ogasawara, K. Kubicek, S. Techert, U. Bergmann, G. Dakovski, W. Schlotter, Y. Harada, I. Zhovtobriukh,
M. Bogan, P. Wernet, A. Föhlisch, L. Pettersson and A. Nilsson, J. Chem. Phys. 142 (2015) 044505 1-9.
12. †Enhancement in Kinetics of the Oxygen Reduction Reaction on a Nitrogen-Doped Carbon Catalyst by Introduction ofIron via Electrochemical Methods: J. Wu, D. Zhang, H. Niwa, Y. Harada, M. Oshima, H. Ofuchi, Y. Nabae, T. Okajima
and T. Ohsaka, Langmuir 31 (2015) 5529-5536.
13. Active site formation mechanism of carbon-based oxygen reduction catalysts derived from a hyperbranched iron phthalocyanine polymer: Y. Hiraike, M. Saito, H. Niwa, M. Kobayashi, Y. Harada, M. Oshima, J. Kim, Y. Nabae and M.-A.
Kakimoto, Nanoscale Res Lett 10 (2015) 179 1-11.
14. †Operando soft x-ray emission spectroscopy of LiMn2O4 thin film involving Li-ion extraction/insertion reaction: D.
Asakura, E. Hosono, H. Niwa, H. Kiuchi, J. Miyawaki, Y. Nanba, M. Okubo, H. Matsuda, H. S. Zhou, M. Oshima and Y.
Harada, Electrochem. Commun. 50 (2015) 93-96.
15. *First-Principles Investigation of Strong Excitonic Effects in Oxygen 1s X-ray Absorption Spectra: Y. Noguchi, M.
Hiyama, H. Akiyama, Y. Harada and N. Koga, J. Chem. Theory Comput. 11 (2015) 1668-1673.
16. カーボンアロイ触媒の開発、そしてその可能性 : 難波江 裕太 , 原田 慈久 , 尾嶋 正治 , ( シーエムシー出版 , SPring-8 の高輝度放射光を利用したグリーンエネルギー分野における電池材料開発、第５章電池における触媒開発 , 2014).
17. * 鉄タンパク質の電子状態と機能 : 原田 慈久 , 辛 埴 , ( 朝倉書店「鉄の事典」, 3.11.d 節 , 2014).

Wadati group
Our main experimental techniques are synchrotron-based x-ray spectroscopy and scattering. We studied the orbital and magnetic
phase transitions in Pr0.5Ca0.5MnO3/LaSrCa0.5MnO3 superlattices by resonant soft x-ray scattering and observed dimensionalcrossover as a function of temperature. We also performed time-resolved x-ray diffraction study of Pr0.5Ca0.5MnO3 thin films byusing x-ray free electron laser in LCLS (USA), and observed a time-dependent order parameter by creating coherent phonons.
1.

Antiferromagnetic Order of the Co2+ High-Spin State with a Large Orbital Angular Momentum in La1.5Ca0.5CoO4: J.
Okamoto, H. Nakao, Y. Yamasaki, H. Wadati, A. Tanaka, M. Kubota, K. Horigane, Y. Murakami and K. Yamada, J. Phys.
Soc. Jpn. 83 (2014) 044705(1-6).

2.

Insulator-to-Superconductor Transition upon Electron Doping in a BiS2-Based Superconductor Sr1−xLaxFBiS2: H. Sakai,
D. Kotajima, K. Saito, H. Wadati, Y. Wakisaka, M. Mizumaki, K. Nitta, Y. Tokura and S. Ishiwata, J. Phys. Soc. Jpn. 83(2014) 014709(1-7).

3.

Bond order and the role of ligand states in stripe-modulated IrTe2: K. Takubo, R. Comin, D. Ootsuki, T. Mizokawa, H.
Wadati, Y. Takahashi, G. Shibata, A. Fujimori, R. Sutarto, F. He, S. Pyon, K. Kudo, M. Nohara, G. Levy, I. Elfimov, G.
A. Sawatzky and A. Damascelli, Phys. Rev. B 90 (2014) 081104(R)(1-5).

4.

Photoemission and DMFT study of electronic correlations in SrMoO3: Effects of Hund's rule coupling and possible
plasmonic sideband: H. Wadati, J. Mravlje, K. Yoshimatsu, H. Kumigashira, M. Oshima, T. Sugiyama, E. Ikenaga, A.
Fujimori, A. Georges, A. Radetinac, K. S. Takahashi, M. Kawasaki and Y. Tokura, Phys. Rev. B 90 (2014) 205131(1-8).

5.

Orbital correlations and dimensional crossover in epitaxial Pr0.5Ca0.5MnO3/La0.5Sr0.5MnO3 superlattices: H. Wadati, J.
Okamoto, M. Garganourakis, V. Scagnoli, U. Staub, E. Sakai, H. Kumigashira, T. Sugiyama, E. Ikenaga, M. Nakamura,
M. Kawasaki and Y. Tokura, New J. Phys. 16 (2014) 073044(1-10).

6.

Revealing orbital and magnetic phase transitions in Pr0.5Ca0.5MnO3 epitaxial thin films by resonant soft x-ray scattering:
H. Wadati, J. Geck, E. Schierle, R. Sutarto, F. He, D. G. Hawthorn, M. Nakamura, M. Kawasaki, Y. Tokura and G. A.
Sawatzky, New J. Phys. 16 (2014) 033006(1-12).

7.

A time-dependent order parameter for non-equilibrium phase transitions: P. Beaud, A. Caviezel, S. O. Mariager, L.
Rettig, G. Ingold, C. Dornes, S.-W. Huang, J. A. Johnson, M. Radovic, T. Huber, T. Kubacka, A. Ferrer, H. T. Lemke,
M. Chollet, D. Zhu, J. M. Glownia, M. Sikorski, A. Robert, H. Wadati, M. Nakamura, M. Kawasaki, Y. Tokura, S. L.
Johnson and U. Staub, Nat. Mater. 13 (2014) 923-927.

8.

X-ray spectroscopic study of BaFeO3 thin films; an Fe4+ ferromagnetic insulator: T. Tsuyama, T. Matsuda, S. Chakraverty, J. Okamoto, E. Ikenaga, A. Tanaka, T. Mizokawa, H. Y. Hwang, Y. Tokura and H. Wadati, Phys. Rev. B 91 (2015)
115101(1-7).

9.

Engineering a spin-orbital magnetic insulator by tailoring superlattices: J. Matsuno, K. Ihara, S. Yamamura, H. Wadati,
K. Ishii, V. V. Shankar, H.-Y. Kee and H. Takagi, Phys. Rev. Lett. 114 (2015) 247209(1-5).
† Joint research with outside partners.

ISSP Activity Report 2014181

10. Observation of a Devil’s Staircase in the Novel Spin-Valve System SrCo6O11: T. Matsuda, S. Partzsch, T. Tsuyama, E.
Schierle, E. Weschke, J. Geck, T. Saito, S. Ishiwata, Y. Tokura and H. Wadati, Phys. Rev. Lett. 114 (2015) 236403(1-5).

Kondo group
A central issue in the search for the mechanism of high temperature conductivity is to determine the bosons which mediate
electron pairing. Electron coupling with a bosonic mode changes the slope of the band dispersion within its excitation energy.
Such a band renormalization or ‘‘kink’’is usually observed in superconducting materials. By using laser-based angle-resolved
photoemission spectroscopy, capable of ultrahigh energy resolution, we found a universal relation between electron-mode
coupling and Tc in the pnictide high-Tc superconductor.
1.

†*

2.

Fermi Surface and Pseudogap Evolution in a Cuprate Superconductor.: Y. He, Y. Yin, M. Zech, A. Soumyanarayanan, M.
M. Yee, T. Williams, M. C. Boyer, K. Chatterjee, W. D. Wise, I. Zeljkovic, T. Kondo, T. Takeuchi, H. Ikuta, P. Mistark,
R. S. Markiewicz, A. Bansil, S. Sachdev, E. W. Hudson and J. E. Hoffman, Science 344 (2014) 608-611.

3.

Pairing, pseudogap and Fermi arcs in cuprates.: A. Kaminski, T. Kondo, T. Takeuchi and G. Gu, Philosophical Magazine
95 (2015) 453-466.

Evidence of a universal relation between electron-mode coupling and Tc in Ba1-xKxFe2As2 superconductor from laser
angle-resolved photoemission spectroscopy: W. Malaeb, T. Shimojima, Y. Ishida, T. Kondo, K. Okazaki, Y. Ota, K.
Ohgushi, K. Kihou, C. H. Lee, A. Iyo, H. Eisaki, S. Ishida, M. Nakajima, S. Uchida, H. Fukazawa, T. Saito, Y. Kohori
and S. Shin, Phys. Rev. B 90 (2014) 195124(1-6).

Okazaki group
We have developed and improved a time- and angle-resolved photoemission (TARPES) apparatus using an EUV and SX laser
by high harmonics generation (HHG). In 2014, we have installed a new chamber for HHG with a gas cell, a spectrometer forchecking spectra of high harmonics, and a chamber for multi-layer mirrors to select a single order of the harmonics. Now, we
can use 28, 40, and 70 eV for a probe light. We have also installed an optical parametric amplifier (OPA) system for a pumplight, and succeeded in obtaining TRPES spectra of graphite using this system. We have studied nonequilibrium electronic statesof graphenes, iron-based superconductors, strongly correlated electron systems, and valence fluctuating heavy fermion systems.
In addition, we have also investigated superconducting-gap structures of iron-based superconductors and BiS2-based superconductors by a low-temperature and high-resolution laser ARPES apparatus.
1.

*

2.

†*

3.

*

Evidence for excluding the possibility of d-wave superconducting-gap symmetry in Ba-doped KFe2As2: Y. Ota, K.
Okazaki, Y. Kotani, T. Shimojima, W. Malaeb, S. Watanabe, C. -T. Chen, K. Kihou, C. H. Lee, A. Iyo, H. Eisaki, T.
Saito, H. Fukazawa, Y. Kohori and S. Shin, Phys. Rev. B 89 (2014) 081103(1-5).
Evidence of a universal relation between electron-mode coupling and Tc in Ba1-xKxFe2As2 superconductor from laser
angle-resolved photoemission spectroscopy: W. Malaeb, T. Shimojima, Y. Ishida, T. Kondo, K. Okazaki, Y. Ota, K.
Ohgushi, K. Kihou, C. H. Lee, A. Iyo, H. Eisaki, S. Ishida, M. Nakajima, S. Uchida, H. Fukazawa, T. Saito, Y. Kohori
and S. Shin, Phys. Rev. B 90 (2014) 195124(1-6).
Superconductivity in an electron band just above the Fermi level: possible route to BCS-BEC superconductivity: K.
Okazaki1, Y. Ito, Y. Ota, Y. Kotani, T. Shimojima, T. Kiss, S. Watanabe, C. -T. Chen, S. Niitaka, T. Hanaguri, H. Takagi,
A. Chainani and S. Shin, Sci. Rep. 4 (2014) 4109(1-6).

* Joint research among groups within ISSP.

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ISSP Activity Report 2014