The Institute for Solid State Physics
The University of Tokyo

5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581
http://www.issp.u-tokyo.ac.jp

Activity Report: The Institute for Solid State Physics (ISSP) The University of Tokyo

The Institute for Solid State Physics
The University of Tokyo

2012

2012

Activity Report
2012

Preface		1

Research Highlights		

2 - 27Highlights of Joint Research

28 - 45

International Conferences
and Workshops

46 - 47

ISSP Workshops		

48 - 53

Subjects of Joint Research

54 - 121

Publications

122 - 155

Preface

We are pleased to present the annual ISSP Activity Report for
the academic year 2012. 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 isat the core of modern condensed matter science. Many groups at ISSP
and their collaborators are involved in this type of “small science”. On the other hand, importance of large
experimental and computational facilities in materials science has been rapidly increasing in recent years. An
important mission of ISSP is to participate in the development and operation of some of those large facilities
that are difficult to maintain for university faculties. Notable achievements in this direction are summarized
below.
(1) ISSP has been operating supercomputers dedicated to materials science. In addition, the Center ofComputational Materials Science launched in 2011 provides technical supports to facilitate use of massively
parallel computational resources such as the K-computer. (2) The International MegaGauss Science Laboratory continues to develop both the destructive ultrahigh magnetic field by electromagnetic compression aimed
at 1000 tesla and the non-destructive long-pulse magnetic field by a flywheel generator. (3) ISSP has been
providing access to quantum beams such as neutrons and synchrotron light sources. Concerning neutron
scattering, the JRR-3 reactor at Tokai is still shut down after the earthquake in 2011, however the pulse
spectrometer at J-PARC is now in operation. The latest development in 2012 is the opening of the new Laserand Synchrotron Research Center, which is aimed at making a new frontier of advanced spectroscopy by
combining laser, synchrotron, and X-FEL light sources in ultraviolet and soft X-ray region.

May, 2013

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

ISSP Activity Report 20121

Research Highlights---Division of New Materials Science-----------------

Incomplete Devil’s Staircase in the
Magnetization Curve of SrCu2(BO3)2
Takigawa and Y. Ueda Groups
Magnetization plateaus in frustrated quantum spin
systems are manifestation of Wigner crystallization ofmagnons, resulting from competition between the kinetic
energy and repulsive interaction. The layered compound
SrCu2(BO3)2 has played a prominent role in this problem
since the discovery of a sequence of plateaus at 1/8, 1/4, and
1/3 of the saturation magnetization. Recent experiments haverevealed a rich phase diagram below the 1/4 plateau, but with
controversial results. We have performed magnetic torqueand 11B-NMR measurements in high magnetic field up to
34 T at the Grenoble High Magnetic Field Laboratory andprecisely determined the sequence and the spin structures ofthe plateaus [1].
The magnetization curve under static magnetic fields
was accurately determined from the torque (τ) data (Fig. 1),
which consist of two terms: τ = aM × H + b(M•∇)M, thefirst one proportional to the transverse magnetization andthe second one to the longitudinal magnetization. The firstterm can be eliminated by taking a linear combination of two
measurements of τ/H taken at different sample positions withthe requirement that the longitudinal magnetization is zero in
the dimer singlet phase below 15 T. The longitudinal magnetization thus obtained clearly shows three plateaus at theratio 1/8:2/15:1/6 below the 1/4 plateau and two intermediatephases below and above the 1/6 plateau.
The plateau phases are associated with symmetry
breaking commensurate spin superstructures, which were
determined from the 11B-NMR spectrum (Fig. 2 (left)).
We have established a systematic way to determine theFig. 2 . (left) The distribution of internal magnetic field at the 11B nuclei
obtained by deconvoluting the quadrupole splitting structure from theexperimental NMR spectra obtained at T=430 mK unless explicitly
indicated. (right) The spin superstructure of the plateaus phases. The
thin black lines show the lattice of orthogonal Cu dimers in one layer.
The thick red lines show the triplet dimers carrying the largest magnetization in the same layer while the blue lines indicate these triplets on
the neighboring layers. The unit cell of each superstructure is shown by
the shaded area.

spin structure from the NMR spectra and the results are
displayed in Fig. 2 (right). All plateaus show stripe order of
triplets. The structure of 1/6 (1/8) plateau can be obtainedby removing every other triplet from the one of the 1/3 (1/4)
plateaus. The 2/15 structure exhibits a sequence of domainsof 1/8-1/8-1/8-1/6 structure, showing how the proliferation of
domain walls leads to a structure of higher order commensurability. This suggests that the plateau sequence can be interpreted as a “devil’s staircase”, which is an infinite sequenceof commensurate phases [2]. However, the NMR spectra in
the intermediate phase consist of only broad lines, indicatingthat what is observed here is an example of “incomplete
devil’s staircase”, in which the infinite sequence of highorder commensurate phases with small steps are replaced byincommensurate phases [3].
References[1] M. Takigawa, M. Horvatić, T. Waki, S. Krämer, C. Berthier,F. Lévy-Bertrand, I. Sheikin, H. Kageyama, Y. Ueda, and F. Mila, Phys.
Rev. Lett. 110, 067210 (2013).
[2] P. Bak, Rep. Prog. Phys. 45, (1982) 587.
[3] S. Arby, Solitons and Condensed Matter Physics, edited by A. R.
Bishop and T. Schneider (Springer-Verlag, Berlin, 1979), p. 264.

Fig. 1. Inset: The torque divided by field vs. field obtained at T=60 mK
with the sample positioned at 10 mm off the nominal field center. Main
panel: The thick black line represents the longitudinal magnetization
with the vertical scale appropriately adjusted. The magnetization values
at 1/8, 2/15, 1/6, and 1/4 of the saturation are shown by the dashedlines. The horizontal bars indicate the field range of the plateaus determined by NMR. The open circles show the magnetization determinedfrom the Cu NMR shift data (Kodama et al., Science 298, (2002) 395).

2

ISSP Activity Report 2012

Authors
M. Takigawa, M. Horvatić, T. Waki, S. Krämer, C. Berthier,F. Lévy-Bertrand, I. Sheikin, H. Kageyama, Y. Ueda, and F. Mila

Hidden Multipole Order in Yb2Pt2Pb
with the Orthogonal Dimer Structure
Sakakibara Group
When a Yb3+ ion (4f13) is situated in a crystalline
electric field of low symmetry, a Kramers doublet becomesthe ground state of the J=7/2 multiplet. Magnetic properties of such systems can be usually described in terms of amagnetic dipole moment carried by the Kramers doublet.
Here we show that the tetragonal compound Yb2Pt2Pb, which
orders antiferromagnetically at TN=2.1 K [1], exhibits avery unusual ordered state in a magnetic field, whose orderparameter is likely to be a high-rank magnetic multipole
moment [2].
The Yb lattice in Yb2Pt2Pb can be viewed as being
composed of orthogonal dimers aligned along [110] or[1-10] directions [1]; we can define two sublattices of Yb
ions: sublattice A of [110] dimers and sublattice B of [1-10]
dimers. In the preceding experiment, Ochiai et al. [3] haveshown that the Yb moment has a strong Ising anisotropy
along the dimer axis. When a magnetic field H is applied
parallel to [110], the antiferromagnetic moments on thesublattice B are decoupled from H because their Ising axes
are perpendicular to H. Accordingly, only the moments on
sublattice A respond to H and the phase diagram is given in
Fig. 1a, where three different ordered phases I, II’ and III
exist. The magnetic structures of phases I and III are shownin Figs. 2a and 2c, respectively. In phase I, both sublattices
A and B are essentially in a collinear structure. In phase
III, magnetic moments on sublattice B remain in a collinear
structure but those on sublattice A become paramagnetic.
Ochiai et al. [3] pointed out that the highly anisotropic
magnetic properties can be understood by assuming the
ground state doublet of Yb3+ ion to be predominantly
composed of states ⎮±7/2〉 with the local quantization axis
parallel to either [110] or [1-10].
There is another phase, phase II’, in the phase diagram

Fig. 2. Proposed magnetic structures of Yb2Pt2Pb for H || [110]. (a)Phase I. Each Yb sublattice has a collinear structure. Thick arrows
indicate the Yb magnetic moment. (b) Phase II’. Sublattice B (solid
circles) remains in a collinear state, whereas sublattice A (open circles)
exhibits a pseudo-spin flop. Dashed arrows denote the pseudo spins
whereas double arrows indicate the multipole moments. (c) Phase III.
Sublattice B remains in a collinear state, whereas sublattice A becomesparmagnetic.

[3]. The exact nature of phase II’, however, has not beenclear in the preceding experiments. We have examined the
low temperature magnetization of Yb2Pt2Pb and found that
the Yb magnetic moment increases almost linearly in phase
II’ and saturates without discontinuity; quite unexpectedly,
the II’-III transition is of second order. This behavior ofphase II’ is apparently incompatible with the Ising anisotropyof the Yb moment. We propose that a high-rank magnetic
multipole moment is the order parameter in phase II’. For
simplicity, let us assume the wave functions of the Kramers
doublet to be ⎮±7/2〉. In a pseudo-spin representation, the z
component is the magnetic dipole Jz. On the other hand, thex and y components are rank-7 magnetic multipoles (octacosahectapoles). It can then be shown that a pseudo-spin flopoccurs in a magnetic field along the Ising axis, if an interaction between the multipole moments is sufficiently strong(Fig.2 b) [2]. In this situation, the magnetic moment along[110] linearly increases with H and continuously saturates, as
observed by experiment.
References[1] M. S. Kim, M. C. Bennett, and M. C. Aronson, Phys. Rev. B 77,
144425 (2008).
[2] Y. Shimura, T. Sakakibara, K. Iwasawa, K. Sugiyama, and Y. Onuki,
J. Phys. Soc. Jpn. 81, 103601 (2012).
[3] A. Ochiai, S. Matsuda, Y. Ikeda, Y. Shimizu, S. Toyoshima, H. Aoki,
and K. Katoh, J. Phys. Soc. Jpn. 80, 123705 (2011).
Authors
Y. Shimura, T. Sakakibara, K. Iwasawaa, K. Sugiyamaa, and Y. OnukiaaOsaka University

Hydrogen Bond-promoted Metallic State in a
Purely Organic Single-component Conductor
Mori Group

Fig. 1. (a) Magnetic phase diagram of Yb2Pt2Pb for H || [110].
(b) Field variation of the magnetization of Yb2Pt2Pb for H || [110]measured at 80 mK.

Realization of “purely organic single-component
molecular metals” has been one of the long-standing open
problems in chemistry, physics, and materials science.
As is well known, purely organic materials are normallyinsulating. Recently, Mori group unveils a new type of purelyorganic single-component molecular conductors based ona catechol-fused ethylenedithiotetrathiafulvalene, H 2CatEDT-TTF, and its diselena analogue, H2Cat-EDT-ST, which
are designed and synthesized by us [1]. These conductors are
the unprecedented single component systems composed ofmolecular units, H3(Cat-EDT-TTF)2 and H3(Cat-EDT-ST)2,

ISSP Activity Report 20123

with the highly symmetric intra-unit hydrogen bond. Theirelectrical conductivity at room temperature is significantly
higher than that for the previously reported purely organic
single-component systems. Under the moderate physicalpressure, moreover, the metallic behavior appeared in thetemperature dependence of the electrical resistivity. The
higher electrical conductivity observed in our systems is
attributed to the hydrogen bond-promoted delocalizationof charge carriers, which are generated through the partial
oxidation of the H 2 Cat-EDT-TTF and H 2 Cat-EDT-ST
molecules [2].
A new type of purely organic single component
molecular conductors, κ-H 3 (Cat-EDT-TTF) 2 and κ-H 3(Cat-EDT-ST)2, hereinafter described as κ-S and κ-Se,
respectively, were obtained as black plate-like crystals
by electrochemical oxidation of the corresponding donor
molecules, H2Cat-EDT-TTF and H2Cat-EDT-ST, in thepresence of the base, 2,2’-bipyridine. The minimal molecular unit, the H3(Cat-EDT-TTF)2 composition (Fig. 1),
is established by the formation of an intra-unit hydrogenbond, O..H..O, between the catechol moieties of the donor
molecules, where the one hydroxyl proton is deprotonated. The oxygen–oxygen distance in the hydrogen bond,d(O..O), is 2.486(5) Å and 2.509(8) Å at room temperature,and 2.453(5) Å and 2.443(8) Å at 50 K and 30 K for κ-S andκ-Se, respectively, which are much shorter than the length of
the normal O–H..O type hydrogen bond, d(O..O) 2.7 ~ 3.0 Å.
Because of this strong hydrogen bonding nature, the bondedhydrogen atom is nearly located at the center between two
oxygen atoms, in contrast to the asymmetric hydrogen
distribution in the normal hydrogen bonds. The minimal
molecular units are assembled into the purely organic single
component crystal.
The electrical conductivity at room temperature is significantly high, 3.5 and 19 S cm−1 for κ-S and κ-Se, respectively.
These values are one or two orders of magnitude higher thanthe highest reported value, σrt = 10−1 S cm−1, in the purelyorganic single-component systems, to our best knowledge.
As temperature is decreased, the electrical resistivity ofthese systems exponentially increases with the energy gap
Δ/ kB, of 2400 K for κ-S and 1200 K for κ-Se, respectively.
The physical pressure is a good tool to change the electronic
states by the modulation of the intermolecular interactions.
We observed dramatic changes in the temperature variationin the electrical resistivity under pressure for κ-Se. Under the

Fig. 1. Structure of the molecular unit and the metallic state in thepurely organic single-component conductor. The “purely organic singlecomponent conductor” developed by Mori’s group with the world
record conductivity at room temperature (19 Scm-1) is composed of theelectrically neutral and symmetric molecular units, where the charge is
widely delocalized. The assembled units construct the two-dimensional
conducting layers which afford the metallic state under the lowest
pressure of around 1 GPa.

4

ISSP Activity Report 2012

pressure above 1.3 GPa, the electrical resistivity monotonically decreases with reducing temperature down to around
150 K, in striking contrast with the semiconducting behavior
at ambient pressure, although the resistive curve turns toincrease at low temperature. Thus, the metallic states emerge
with the simultaneous suppression of the semiconducting
energy gap by the application of the pressure of only 1 GPa.
To our knowledge, this is the lowest metallization pressure
among the purely organic single-component systems.
Our system demonstrates that the symmetric hydrogenbond constructs the new type of the purely organic singlecomponent molecular conductors which are composed ofhighly symmetric molecular units. Moreover, we found thatthe formation of the symmetric hydrogen bond promoted
the intermolecular delocalization of the generated carriers,
associated with the enhancement of the electrical conductivity. We believe that our new type of molecular conductors with the symmetric intra-unit hydrogen bond willrealize the first purely organic single-component molecular
metal at ambient pressure. A tetraselenafulvalene (TSF)type analogue, in which all the sulfur atoms in the TTF partof the present system are replaced with selenium atoms,
is a promising candidate for the ambient-pressure metal,
because the further enhanced intermolecular interactions are
expected.
References[1] H. Kamo, A. Ueda, T. Isono, K. Takahashi, and H. Mori,
Tetrahedron Lett. 53, 4385 (2012).
[2] 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).
Authors
T. Isono, H. Kamo, A. Ueda, K. Takahashia, A. Nakaob, R. Kumaic,
H. Nakaoc, K. Kobayashic, Y. Murakamic, and H. MoriaKobe UniversitybResearch Center for Neutron Science and Technology, CROSSc
Institute of Materials Structure Science, KEK

Quantum Monopolar Fluctuations in the
Exchange-based Spin Ice System Pr2Zr2O7
Nakatsuji Group
Spin ice is a magnetic analogue of H2O ice that harbors
dense static disorder. Dipolar interactions between classical
Ising spins on pyrochlore lattice yield a frozen frustrated
state with residual configurational Pauling entropy [1].
Mimicking the formation of an H3O+−OH− electric dipole
in water ice, a spin flip from the spin ice manifold fractionalizes into a pair of emergent magnetic monopolar quasiparticles with Coulomb attraction. In classical spin ice,monopole dynamics is diffusive −only activated thermally or
by external magnetic field. The classical nature of Ising spinsprecludes attainment of thermal equilibrium at temperatures below the effective nearest neighbor energy scale Jff.
Introducing quantum fluctuations is of great interest as itenhances dynamics and might allow coherent propagationof magnetic charge (Fig. 1), much as spinons in one dimensional quantum magnets.
Here, we report the experimental observation of spin
ice correlations and quantum dynamics in a new class of
spin ice based on exchange interactions, Pr2Zr2O7 [3]. We
have succeeded in growing high quality single crystals at
ISSP, which are stoichiometric to the 1-2% level. Inelastic

pattern resembles the nominally elastic scattering (Fig. 2a),the pinch points have vanished. Excited states thus differ
from the ground state by the appearance of tetrahedra that
violate the ice rule or in other words by the presence ofmagnetic monopoles, furnishing evidence for magnetic
monopolar quantum fluctuations. Such inelastic scattering
accounts for >90% of the magnetic scattering cross section
at 0.1 K, showing that magnetism in Pr2Zr2O7 is dominatedby quantum fluctuations. Our observation in Pr2Zr2O7 isunlike any previously documented in an insulating crystalline magnet. The interplay between monopolar quantum
dynamics and itinerant electrons may play an important rolein the isostructural Kondo lattice system Pr2Ir2O7 [4].
Fig. 1. Schematic illustration of magnetic monopolar quasi-particle
with quantum dynamics. Red arrows denote magnetic moment. Red andBlue spheres indicate a pair of magnetic monopoles.

neutron scattering measurements revealed that the crystalline electric field (CEF) ground state of Pr3+ is magnetic
doublet with <111> Ising anisotropy, as in classical spin ice
systems. AC-magnetic susceptibility and specific heat data
show activated dynamics and residual entropy below 0.1 K,
again similar to the behavior in classical spin ice systems.
However, Curie-Weiss behavior in the temperature dependence of magnetic susceptibility for T < 10 K indicated aneffective moment µeff = 2.5(1)µB that is four times smaller
than for dipolar spin ice Dy2Ti2O7 where µeff = 10µB. Correspondingly, Pr2Zr2O7 displays an antiferromagnetic (AFM)
Weiss temperature θCW = −1.4(1) K compared to the ferromagnetic (FM) θCW ≈ +0.5 K for dipolar Dy2Ti2O7.
Quasi-static spin correlations were investigated usingelastic neutron scattering and the result at T = 0.1 K isshown in Fig. 2(a). Sharp pinch point features near (111)and particularly (002), bear evidence of a divergence free
two-in two-out spin configuration on each tetrahedron.
Indeed, the elastic Q-map resembles a classical Monte Carlosimulation for an exchange only model, which indicatesdominant FM superexchange interactions in Pr 2Zr 2O 7.
θCW is however, negative and this suggests the exchange
Hamiltonian includes AFM transverse terms that induce
quantum dynamics. Figure 2(b) shows the Q-map of inelastic
scattering at ħω = 0.25 meV and T = 0.1 K. While the overall

Fig. 2. Spin ice correlations and quantum dynamics in Pr2Zr2O7 probed
through elastic and inelastic neutron scattering. (a) Elastic Q-map at
0.1 K with pinch points at (002), (111), and (-1-11). 22 K data wassubtracted as a high-temperature background to cancel elastic nuclear
scattering processes at Bragg peak. (b) Inelastic Q-map at ħω = 0.25
meV and T = 0.1 K after subtracting the corresponding data at 15 K as
background [3].

References[1] S. T. Bramwell and M. J. P. Gingras, Science 294, 1495 (2001).
[2] C. Castelnovo, R. Moessner, and S. L. Sondhi, Nature 451, 42(2008).
[3] K. Kimura, S. Nakatsuji, J.-J. Wen, C. Broholm, M. B. Stone, E.
Nishibori, and H. Sawa, to be published in Nature Communications(2013).
[4] Y. Machida, S. Nakatsuji, S. Onoda, T. Tayama, and T. Sakakibara,
Nature 463, 210 (2010).
Authors
K. Kimura, S. Nakatsuji, J.-J. Wena, C. Broholma,b,c, M. B. Stonec,
E. Nishiborid, and H. Sawad,aJohns Hopkins University, USAb
National Institute of Standards and Technology, USAc
Oak Ridge National Laboratory, USAdNagoya University

Heavy Fermion Superconductivity
in the Ferroquadrupolar State in the
Quadrupolar Kondo Lattice PrTi2Al20
Nakatsuji Group
Orbital degree of freedom provides a various interesting
phenomena such as colossal magnetoresistance, orbital
ordering, and quantum spin-orbital liquid states. Althoughorbital degree of freedom strongly couples to spin andcharge degrees of freedom in d-electron systems, f-electron
systems with 4f2 configuration, such as cubic Pr and U based
compounds, sometimes exhibit nonmagnetic ground statewith a pure orbital degree of freedom known as quadrupole
moments. In analogy with magnetic Kondo lattice systems,
two competing interactions, RKKY type intersite couplingand quadrupolar Kondo effect, can be induced in quadrupolar Kondo lattice systems due to hybridization between 4f
quadrupole and conduction(c-) electrons, which may lead tonovel quantum criticality of quadrupole order.
Recently, we revealed that PrTr2Al20 (Tr = transition
metal) is the first ideal quadrupolar Kondo lattice system thatallows us to tune the hybridization strength and the quadrupolar ordering temperature [1]. Among them, PrTi2Al20 is thebest studied and established to have nonmagnetic Γ3 crystal
electric field ground doublet with ferroquadrupolar ordering
at TQ = 2.0 K [1 - 4] as well as strong c-f hybridization [1, 5].
Here, we report the heavy fermion superconductivity at
Tc = 0.2 K in the ferroquadrupolar ordered state of PrTi2Al20.
The temperature dependence of critical field Bc2 and weakdifferential paramagnetic effect indicate type-II superconductivity. Estimated effective mass m* from Bc2 andSommerfeld coefficient γ is ~16 m0, indicating moderately
enhanced m* by hybridization. The positive ∂2Bc2/∂T2 at ~Tc
and sensitivity of Tc to sample quality suggest the multi-gap

ISSP Activity Report 20125

Fig. 1. Temperature dependence of the resistivity below 2.5 K in
PrTi2Al20 (solid circle). Arrows indicate the ferro-quadrupole transition
temperature TQ = 2.0 K and superconducting transition temperature
Tc = 0.2 K. Inset: T dependence of the real part of the ac-susceptibility(solid line) and dc-susceptibility for zero field cooled (ZFC, solid
circle) and field cooled (FC, open circle).

nature of the superconductivity. These features provide
an interesting counterpart to the superconductivity at Tc =50 mK in the antiferro-quadrupole ordered state of PrIr2Zn20[7, 8], where in contrast 4f electrons are well localized. Moreenhanced Tc and Bc2 in PrTi2Al20 should come from the mass
enhancement due to the strong hybridization between 4f andc-electrons.
References[1] A. Sakai and S. Nakatsuji, J. Phys. Soc. Jpn. 80, 063701 (2011).
[2] T. J. Sato, S. Ibuka, Y. Nambu, T. Yamazaki, A. Sakai, and
S. Nakatsuji, arXiv0301828.
[3] T U. Ito, W. Higemoto, K. Ninomiya, H. Luetkens, C. Baines,
A. Sakai, and S. Nakatsuji, J. Phys. Soc Jpn. 80, 113703 (2011).
[4] M. Koseki, Y. Nakanishi, K. Deto, G. Koseki, R. Kashiwazaki,
F. Shichinomiya, M. Nakamura, M. Yoshizawa, A. Sakai, and
S. Nakatsuji, J. Phys. Soc. Jpn. 80, SA049 (2011).
[5] M. Matsunami, M. Taguchi, A. Chainani, R. Eguchi, M. Oura,
A. Sakai, S. Nakatsuji, and S. Shin, Phys. Rev. B 84, 193101 (2011).
[6] A. Sakai, K. Kuga, and S. Nakatsuji, J. Phys. Soc. Jpn. 81, 083702(2012).
[7] T. Onimaru, K. T. Matsumoto, Y. F. Inoue, K. Umeo, Y. Saiga,
Y. Matsushita, R. Tamura, K. Nishimoto, I. Ishii, T. Suzuki, andT. Takabatake, J. Phys. Soc. Jpn. 79, 033704 (2010).
[8] T. Onimaru, K. T. Matsumoto, Y. F. Inoue, K. Umeo, T. Sakakibara,
Y. Karaki, M. Kubota, and T. Takabatake: Phys. Rev. Lett. 106, 197201(2011).
Authors
A. Sakai, K. Kuga, and S. Nakatsuji

an ordered electronic state, such as magnetism. On the other
hand, in apparent contradiction to these low temperature
properties, the Yb f-moment in β-YbAlB4 shows strong
valence fluctuations [4] (the Yb valence is +2.75) and has ahigh Kondo temperature (TK ~ 200 - 300 K) [1, 3]; behaviors
that usually lead to a Fermi liquid ground state with weakly
renormalized quasiparticles. A study of the Hall effect sheds
new light on the evolution of the electronic structure of
β-YbAlB4 and suggests how these behaviors can coexist [5].
The Hall effect measurements using high quality crystalsof β-YbAlB4 found that the Hall coefficient has strong
temperature dependence and a minimum at T = 40 K (seeFig. 1), that bears a close similarity to Kondo rather thanmixed-valence systems. The usual interpretation of thisresult would put the Kondo temperature at 40 K rather than
200 - 300 K, as was measured by the longitudinal resistivity.
To answer the question of how β-YbAlB4 can appear tohave two Kondo temperatures separated by almost an orderof magnitude, we suggested a two component Hall effect,
which was supported by the magnetic field dependence ofthe Hall resistivity.
As the temperature is lowered below 100 K the Hall
resistivity becomes non-linear; a careful analysis showed thatthe field dependence can be explained by the material having
two field independent Hall coefficients, the combination ofwhich leads to a non-linear Hall resistivity. Furthermore, thisanalysis allowed us to show that the mobility of the material
strongly increases approaching the minimum at 40 K; thus
demonstrating that the minimum in the Hall coefficient is
indeed due to the onset of coherent transport in a second
component of the electronic transport that has just 10% of
the total carrier density.
The reason that these two components have such different
Kondo temperatures is suggested by the Fermi surface of
β-YbAlB4 together with a recent theoretical analysis showingthat the hybridization between conduction electrons andf-moments may vanish at certain points in momentum space[6]. These nodal points lead to a large difference in hybridization strength and thereby a different Kondo temperature
between the two Fermi surfaces, one of which passes close to
the nodal region and the other of which is well separated.
These results therefore suggest that the emergent second
component arises from the Fermi surface that lies close to theregion of vanishing hybridization that may be responsible forthe quantum critical and superconducting behavior observed
at low temperature. This scenario is consistent with a recent

Evolution of c-f Hybridization and Two
Component Hall Effect in β-YbAlB4
Nakatsuji Group
Several recent studies of the mixed-valence compoundβ-YbAlB4 have revealed the remarkable properties which
are seemingly contradictory to one another within a conventional understanding of f-electron intermetallics. β-YbAlB4
is the first Yb-based material in which highly renormalized
electronic quasiparticles (with effective masses > 100 times
larger than the bare electronic mass) superconduct [1, 2]. In
addition, β-YbAlB4 was found to have a quantum criticalpoint at exactly zero magnetic field and zero pressure [3],suggesting the vanishing of an energy scale associated with

6

ISSP Activity Report 2012

Fig. 1. The Hall coefficient (RH) of β-YbAlB4 vs temperature (T) for
several different quality samples compared to a mixed valent compound
YbAl3 (left-hand axis). β-YbAlB4 shows a strong temperature dependence characteristic for materials with incoherent skew-scattering fromlocalized moments as expected when the Kondo interaction dominates.
The Hall mobility μ obtained from the two band analysis is also shown(right-hand axis).

theoretical work which provides a phenomenological modelfor quantum criticality in β-YbAlB4 [6].
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,
Phys. Rev. Lett. 101, 137004 (2008).
[3] Y. Matsumoto, S. Nakatsuji, K. Kuga, Y. Karaki, N. Horie,
Y. Shimura, T. Sakakibara, A. H. Nevidomskyy, and P. 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, Phys. Rev.
Lett. 104, 247201 (2010).
[5] E. C. T. O’Farrell, Y. Matsumoto, and S. Nakatsuji, Phys. Rev. Lett.
109, 176405 (2012).
[6] A. Ramires, P. Coleman, A. H. Nevidomskyy, and A. M. Tsvelik,
Phys. Rev. Lett. 109, 176404 (2012).
Authors
E. C. T. O’Farrell, Y. Matsumoto, and S. Nakatsuji

Quantum Compass Model Realizedin Post-Perovskite Iridate CaIrO3
Ohgushi Group
There is a new trend toward exploring Mott physics in 5dtransition metal oxides with a strong spin-orbit interaction.
Theoretical calculations on the Hubbard model revealed thatthe spin-orbit interaction drives a transition from a correlated metal to an insulator [1]. This novel Mott insulatingstate is actually realized in a layered perovskite Sr2IrO4,
including Ir4+ ions with a (t2g)5 electronic configuration[2]. In this compound, one hole among t2g manifolds takes
a complex wavefunction with the spin and orbital magnetic
moments of 1/3 and 2/3 μB, respectively, and this state is
now called the Jeff =1/2 state. The superexchange interaction across two Ir4+ ions in the Jeff =1/2 state is theoretically shown to be unique [3]. Whereas an antiferromagnetic
Heisenberg interaction J1Si·Sj is dominant in a corner-shared
IrO6 bond, the magnetic interaction of the edge-shared IrO6
bond becomes a highly anisotropic and ferromagnetic one,
-J2SizSjz, where the z direction is perpendicular to the plane
expanded by the two Ir atoms and two O atoms responsible
for the edge-shared bond. This interaction, which is called
the quantum compass model, captures great interests since aquantum spin liquid is realized when this interaction works

Fig. 1. (a) The schematic view of Jeff =1/2 state. (b) Magnetic structureof the post-perovskite CaIrO3. The solid lines indicate the conventional
unit cell, which is twice as large as the primitive unit cell. The magnetic
interaction are also shown.

on the honeycomb lattice (Kitaev model). To test the validityof this theory, it is necessary to elucidate the magnetic structure of an Ir oxide with an edge-sharing octahedral network.
We performed resonant x-ray diffraction experiments
at the L absorption edges for the post-perovskite-type
compound CaIrO3, which shows a Mott insulating behavior
characterized by the charge gap ~0.17 eV and undergoes atransition to a canted antiferromagnetic state at 115 K [4]. By
observing the magnetic signals, we could clearly see that themagnetic structure was a striped order with an antiferromagnetic moment along the c-axis and that the wavefunction of
a t2g hole is strongly spin-orbit entangled, the Jeff =1/2 state(Fig. 1). The observed spin arrangement including the weakferromagnetic moments along the b-axis is totally consistent
with the theoretical work predicting isotropic-antiferromagnetic and anisotropic-ferromagnetic superexchange interactions across the corner- and edge-sharing bonds, respectively.
Our results stimulate further exploration of a novel quantum
spin state in iridates.
References[1] D. Pesin and L. Balents, Nat. Phys. 6, 376 (2010).
[2] B. J. Kim, H. Ohsumi, T. Komesu, S. Sakai, T. Morita, H. Takagi,
and T. Arima, Science 323, 1329 (2009).
[3] G. Jackeli and G. Khaliullin, Phys. Rev. Lett. 102, 017205 (2009).
[4] K. Ohgushi, J. Yamaura, H. Ohsumi, K. Sugimoto, S. Takeshita,
A. Tokuda, H. Takagi, M. Takata, and T. Arima, Phys. Rev. Lett. 110,217212 (2013).
Authors
K. Ohgushi, J. Yamaura, H. Ohsumia, K. Sugimotob, S. Takeshitaa,
A. Tokudac, H. Takagid, M. Takataa,b, and T. Arimaa,ea
RIKEN SPring-8 CenterbJapan Synchrotron Radiation Research Institute, SPring-8cKwansei Gakuin UniversitydDepartment of Physics, University of Tokyoe
Department of Advanced Materials Science, University of Tokyo

Magnetism of Fe-Based Ladder Compounds
Ohgushi, Sato, Y. Ueda, and Uwatoko Groups
Since the discovery of superconductivity at high transition temperature in LaFeAsO1-xFx, the study of Fe-based
superconductors has become a main stream in condensed
matter physics. The basic structural feature of Fe-based
superconductors is a square lattice of Fe atoms coordinated tetrahedrally by pnictogens or chalcogens. The mostcommon magnetic structure realized in parent materials is a
stripe order, which is stabilized by Fermi surface nesting andthe orbital ordering. More recently, a block order was foundin A2Fe4Se5 (A = K, Rb, and Cs); an important feature of thisordered phase is a large magnetic moment 3.3 μB as a consequence of the strong electron correlation effect [1]. To gain
further insights into the mechanism and variation of thesemagnetic orders, investigation of Fe-based compounds withvarious dimensions is important, because the dimensionality
strongly influences the itinerancy of electrons.
We investigated electronic properties of Fe-based
chalcogenides AFe2Se3 (A = Ba and Cs), in which Fe atoms
form a quasi-one-dimensional ladder structure [2, 3]. Bothcompounds are Mott insulators due to prominence of theelectron correlation effect in low-dimensional systems. The
magnetic susceptibility shows anomaly corresponding to
the magnetic order at 255 and 175 K for A = Ba and Cs,
respectively. Interestingly, magnetic structures determinedby neutron diffraction experiments are distinct in between:

ISSP Activity Report 20127

Mechanism of Enhanced
Second-Harmonic Generationin Noncentrosymmetric Metal
Ohgushi, Suemoto, and Tajima Groups

Fig. 1. (a) Temperature (T) dependence of the magnetic susceptibility(χ) at 5 T for Fe-based ladder compounds AFe2Se3 (A = Ba and Cs).
(b) Magnetic structures determined by neutron diffraction experiments.
Brock and stripe orders are realized in A = Ba and Cs, respectively.

whereas magnetic moments of 2.8 μB perpendicular to theladder plane are arranged to form a Fe4 ferromagnetic unit
and each Fe4 stacks antiferromagnetically in A = Ba (blockorder), magnetic moments of 1.8 μB along the leg direction
couple ferromagnetically and antiferromagnetically along therung and leg directions, respectively, in A = Cs (stripe order).
These magnetic properties are partly explained by recent
Hartree-Fock calculations for the five-orbital Hubbard model[4]. Our results demonstrate that magnetism of Fe-based
superconducting materials is rather complex owing to themulti-band effect and/or the electron correlation effect.

Solids without spatial inversion symmetry attract greatinterests in the current condensed matter physics. The
most common and well-studied systems without inversion
symmetry are the ferroelectrics, where macroscopic polarization appears in an insulating state. Recently, conductive
materials without inversion symmetry, which are known as
noncentrosymmetric metals, have also attracted interest. In
contrast to ferroelectrics, noncentrosymmetric metals do
not exhibit macroscopic polarization due to screening byconducting electrons; instead the state is characterized bya higher-rank tensor (e.g. piezo-electric tensor). The breakdown of inversion symmetry is considered to influence thetransport properties. For example, it is theoretically predictedthat the inverse Faraday effect can be induced by Rashba
interaction [1]. However, there have been few experimental
studies [2], because noncentrosymmetric metals are rare.
We investigated electronic properties of a noncentrosymmetric metal Pb2Ir2O6O’, which has the pyrochlore-type
structure consisting of the Pb2O’ and Ir2O6 building units[3]. Structural analysis revealed that the structural distortion relevant to the breakdown of the inversion symmetry
is dominated by the Pb2O’ unit but is very small in the Ir-O
network. Nevertheless, gigantic second-harmonic generation (SHG) signal originating from the Ir 5d electrons, whichis as large as SHG signals of GaAs, was observed. Firstprinciples electronic structure calculations reveal that theReferences[1] P. Dai, J. Hu, and E. Dagotto, Nat. Phys. 8, 709 (2012).
[2] Y. Nambu, K. Ohgushi, S. Suzuki, F. Du, M. Avdeev, Y. Uwatoko,
K. Munakata, H. Fukazawa, S. Chi, Y. Ueda, and T. J. Sato, Phys. Rev.
B 85, 064413 (2012).
[3] F. Du, K. Ohgushi, Y. Nambu, T. Kawakami, M. Avdeev, Y. Hirata,
Y. Watanabe, T. J. Sato, and Y. Ueda, Phys. Rev. B 85, 214436 (2012).
[4] Q. Luo, A. Nicholson, J. Rincón, S. Liang, J. Riera, G. Alvarez,
L. Wang, W. Ku, G.D. Samolyuk, A. Moreo, and E. Dagotto, Phys.
Rev. B 87, 024404 (2013).

Authors
K. Ohgushi, Y. Hirata, T. J. Sato, Y. Nambu, Y. Ueda, F. Du, S. Suzuki,
Y. Uwatoko, K. Munakata, M. Avdeeva, T. Kawakamib, Y. Watanabeb,
H. Fukazawac, and S. ChidaBragg Institute, Australian Nuclear Science and Technology Organizationb
Nihon UniversitycJapan Atomic Energy Agencyd
Oak Ridge National Laboratory

Fig. 1. (a) Crystal structure of Pb2Ir2O6O’, which can be viewed asa sum of two interpenetrating units, Pb2O’ and Ir2O6. (b) Polarization dependence of the observed (left) and simulated (right) secondharmonic generation signals for Pb2Ir2O6O’. αω and α2ω stand forpolarization of incident and generated beams, respectively. (c) Total andpartial density of states obtained from the first-principles calculation.
SHG signals originate from dipolar transitions among the bands labeled
as α, β, and γ. The large hybridization of O’ 2p orbitals with α and βbands results in the observed large SHG signals.

8

ISSP Activity Report 2012

underlying mechanism for this phenomenon is the inductionof the noncentrosymmetricity in the Ir 5d bands by the strong
hybridization with O’ 2p orbitals, which are unique characteristics of Pb-containing pyrochlore-type oxides. Our results
stimulate theoretical study of inversion broken iridates,
where exotic quantum states such as a topological insulator
and Dirac semimetal are anticipated.
References[1] V. M. Edelstein, Phys. Rev. Lett. 80, 5766 (1998).
[2] K. Ohgushi, J. Yamaura, M. Ichihara, Y. Kiuchi, T. Tayama,
T. Sakakibara, H. Gotou, T. Yagi, and Y. Ueda, Phys. Rev. B 83, 125103(2011).
[3] Y. Hirata, M. Nakajima, Y. Nomura, H. Tajima, Y. Matsushita,
K. Asoh, Y. Kiuchi, A.G. Eguiluz, R. Arita, T. Suemoto, and
K. Ohgushi, Phys. Rev. Lett. 110, 187402 (2013).
Authors
Y. Hirata, M. Nakajimaa, Y. Nomurab, H. Tajima, Y. Matsushitac, K.
Asoh, Y. Kiuchi, A. G. Eguiluzd, R. Aritab, T. Suemoto, and K. OhgushiaChiba Universityb
Department of Applied Physics, The University of Tokyo
cNational Institute for Materials Scienced
The University of Tennessee---Division of Condensed Matter Theory-----------------

Superconductivity in a Correlated
E⊗e Jahn-Teller System
Takada GroupThe competition of electron-phonon (e-ph) and electronelectron (e-e) interactions in the mechanism of superconductivity is an old issue in strongly correlated systems and it
has been investigated mostly in a single-orbital system, likethe Hubbard-Holstein model in which the e-ph interaction
enhances charge fluctuations, inducing an s-wave superconductivity in the vicinity of a charge density-wave (CDW)
phase, whereas the e-e interaction suppresses such charge
fluctuations but enhances spin ones, leading to a d-wave
superconductivity near a spin density-wave (SDW) phase.
If the effect of the e-ph interaction is about the same as thatof the e-e interaction, there appears a rather complex natureof the pairing, namely, the off-site pairing (leading to either
the extended s-wave or the d-wave nature, depending on thelattice structure) composed of not the bare electrons but the(phonon fully-dressed) polarons [1].
Here we add a further complication to this correlated
and strongly phonon-coupled system by including theorbital degree of freedom. More specifically, we consider a
two-dimensional (2D) square lattice with each site made ofan E⊗e Jahn-Teller (JT) center, namely, a site composed of
doubly degenerate orbitals like the eg orbitals in the d bands
which are coupled to the doubly-degenerate JT phonons.
At each center, we also consider the e-e interaction in an
appropriate way to make this JT crystal as a prototype ofthe charge-spin-orbital complexes. Then the Hamiltonian
H of this system is given by H=H0+He-e+He-ph, where H0 is
the noninteracting part composed of the electron hopping
term characterized by the nearest-neighbor and next-nearestneighbor hopping integrals, t and t’, respectively, withkeeping the orbital symmetry and the degenerate-phononterm with the phonon energy Ω0. The orbital degree of
freedom will be described by pseudospin for analogy tospin degree of freedom and the pseudospin symmetry isconserved throughout the crystal in this choice of H0. Other
terms, He-e and He-ph, consist of local-site terms written with

the intra-orbital Coulomb interaction U, the Hund’s-rule
coupling J, and the JT coupling g.
Due to the SU(2) symmetry in spin space and theconserved symmetry in pseudospin space, the Cooper
pairing state can be specified by three quantum numbers;
S the total spin of the pair, L the total pseudospin, and Ly
its y component, making it possible to write the anomalous
self-energy as ΔSLLy(k), where k is a combined notation of
crystal momentum k and fermion Matsubara frequencyiωn=iπT(2n+1) at temperature T with an integer n. Becauseof the rotational symmetry around the orbital-y axis,
Ly =±1 states are degenerate and thus we treat only either
Ly =0 or 1 here. The group theory determines the transformation property of ΔSLLy(k) in k space; it transforms inaccordance with Γ, one of the irreducible representation of
the point group C4v (A1, A2, B1, B2, or E). The Pauli exclusion principle dictates that ΔSLLy(k) must be antisymmetric
under two-electron interchange, indicating that Γ must be
E for (S,L) equal to either (0, 0) or (1, 1); otherwise Γ mustbe either A1, A2, B1, or B2. With including this transformation property in Γ, we can easily write down the Eliashberg
equation for ΔSLLy(k) at T=Tc with the pairing interaction
VSLLy(q) containing the charge, spin, and orbital susceptibilities χc(q), χs(q) and χo(q), all of which are evaluated in the
RPA with use of the irreducible susceptibility χo(q).
In Fig. 1, the phase diagram at T=0.02t is plotted in the
U-g plane for the typical case of t’=0.125t, U=8t, J=t, andΩ0=0.10t at half filling. Two boundaries, denoted by LI and
LII, indicates the lines where χo(q), and χs(q) diverge, respectively. In the close vicinity of these boundaries, those fluctuations are enhanced strongly enough to make the systementer into various superconducting phases, each labeled by(Γ;S,L,Ly). Among them, we find (E;0,0,0) which is a novel
chiral p-wave pairing state, px(k)±ipy(k), characterized byspin-singlet, orbital-singlet, and odd-parity in momentum
space. This is a state very specific to the degenerate multiorbital system and is induced by the cooperative effects oforbital and spin fluctuations that are, respectively, enhancedby e-ph and e-e interactions [2].
The conservation of the pseudospin symmetry is assumed
in this study, but it is not always the case. By some tentative
works, we come to know that the perturbation breaking thisconservation will enhance Tc for the iron pnictides, while it
reduces Tc very much for the vanadium oxides. This is an
issue to be studied further in the future.

Fig. 1. Phase diagram in the U-g plane at half filling for U/8=J=t, t’=0.125t, and Ω0=0.10t at T=0.02t. Units of strengths are so definedas UM=32/9χ0(Q,0) and gM2/Ω0=1/χ0(Q,0), where Q [=(π,π)] is themomentum maximizing both χo(q,0) andχs(q,0).

ISSP Activity Report 20129

References[1] Y. Takada, J. Phys. Soc. Jpn. 65, 1544 (1996).
[2] C. Hori, H. Maebashi, and Y. Takada, J. Supercond. Nov. Magn. 25,
1369 (2012).
Authors
C. Hori, H. Maebashi, and Y. Takada

Dimensional Crossover in
Layered f-Electron Superlattices
Oshikawa Group
Dimensionality plays a crucial role in condensed matterphysics, especially in systems with strong interactions.
Layered structures provide an opportunity to control thedimensionality and to observe effects of reduced dimensionality and crossover behavior between two and three
dimensions. In particular, recent successful fabrications of
the layered superlattices of CeIn3/LaIn3 [1] and CeCoIn5/
YbCoIn5 [2] have opened new possibilities for investigatingsuch phenomena in f-electron systems. In these systems,
the f-electrons are present only in the Ce layers, which are
2-dimensional. These systems exhibit antiferromagnetic orsuperconducting long-range order in regions of the phase
diagram, which implies a dimensional crossover to 3 dimensions. These observations also give rise to an even more
fundamental question on the dimensionality of the heavy
electron states, before formation of any order. Existing
theories on these systems have been based on the assumptionthat the f-electrons, separated by the spacer layers, are almost
decoupled, which results in essentially 2-dimensional heavy
electron states.
We reexamined [3] the heavy electron states in thelayered f-electron superlattices, based on the inhomogeneous dynamical mean field theory combined with numerical
renormalization group as an impurity solver. We show thatthe spectral function exhibits formation of heavy electrons
in the entire system below a temperature scale T0. On theother hand, in terms of transport, two different coherence
temperatures Tx and Tz are identified in the in-plane- and theout-of-plane-resistivity, respectively. Remarkably, we findTz < Tx ~ T0 due to scatterings between different reduced
Brillouin zones. The existence of these two distinct energy
scales implies a crossover in the dimensionality of the heavy

Fig. 1. Electron spectral function in a layered f-electron superlattice as afunction of the momentum component kz perpendicular to the layers, ata low temperature with fixed in-plane components kx, ky. The dispersion
along the z-axis implies formation of heavy electron states extending
over the entire system, coupled through the spacer layers which do nothave f-electrons.

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ISSP Activity Report 2012

electrons between two and three dimensions as temperature or layer geometry is tuned. This dimensional crossoverwould be responsible for the characteristic behaviors in themagnetic and superconducting properties observed in theexperiments.
References[1] H. Shishido, T. Shibauchi, K. Yasu, T. Kato, H. Kontani,
T. Terashima, and Y. Matsuda, Science 327, 980 (2010).
[2] Y. Mizukami, et al., Nat. Phys. 7, 849 (2012); S. K. Goh, et al.,Phys. Rev. Lett. 109, 157006 (2012).
[3] Y. Tada, R. Peters, and M. Oshikawa, preprint (2013).
Authors
Y. Tada, R. Petersa, and M. OshikawaaKyoto University

Superconductivity near a Transverse
Saturation Field in URhGe
Tsunetsugu Group
Ferromagnetic superconductivity in uranium-based
heavy-fermion compounds has attracted much attention incondensed matter physics in the last decade. UGe2, URhGe,UIr, and UCoGe show unconventional superconductivity
within their ferromagnetic phases. Nonunitary superconductivity is believed to appear in these compounds andtheir pairing mechanism and symmetry as well as novel
self-induced vortex states are central issues to be clarified
in the modern theory of unconventional superconductors.
Among these ferromagnetic superconductors, two isomorphic compounds, UTGe (T = Rh, Co), exhibit superconductivity at ambient pressure within their ferromagnetic stateand have a similar Ising-type anisotropy of magnetization.
Spontaneous moment appears parallel to the c axis, and its
magnetization curve exhibits meta-magnetic behavior with anotable mass enhancement when magnetic field H is applied
to the b direction. This meta-magnetism is particularly
prominent in URhGe and the moment gradually tilts withfield and finally aligns parallel to H at hs = 12 T. Superconductivity appears below the transition temperature Tsc = 0.24
K for H = 0, and Tsc decreases with H and disappears at 2 T
for H // b. Interestingly, superconductivity reappears above
8 T and shows the highest Tsc = 0.42 K at 12 T. The mechanism of this novel re-entrant superconductivity has not been
fully clarified until now.
In this project, we propose a mechanism of the re-entrant
superconductivity and analyze magnetic-field dependence ofthe spin-components of the superconducting order parameter.
We point out that there are soft magnetic excitations near thetransverse-saturation field hs in these anisotropic systems as
similar to the case in the transverse Ising system, and clarify
how these soft excitations couple with itinerant electrons. We
develop a weak-coupling theory of p-wave superconductivity
in the presence of both ferromagnetism and magnetic field.
Figure 1 shows our result of temperature-magnetic
field (hx) phase diagram. Here, hx represents the magnetic
field strength in b direction. The superconducting transition temperatures for the polar state (Txsc) and that for the
ABM state (Tyzsc) are depicted. The amplitude of the gap ∆in the magnetic excitations and the tilting angle θ are alsoplotted in Fig. 1. In the low-field region, Tsc is suppressedas hx increases and disappears due to orbital pair-breaking
effects. In the high-field region near the saturation field hs,

Development of Novel First-Principles
Methods for Material Research
Sugino Group

Fig. 1. Temperature - magnetic field (hx) phase diagram. P-wave superconducting transition temperature for the polar state (Txsc) and thatfor the ABM state (Tyzsc) are shown. The amplitude of the gap ∆ inthe magnetic excitations and the tilting angle θ of the ferromagnetic
moments measured from the zero-field direction are also plotted. The
transition temperatures are scaled by the value at hx = 0, where Txsc
= Tyzsc. Arrows depict the change in direction of the ferromagnetic
moment with magnetic field.

another superconducting phase appears and the transition
temperature reaches a maximum at the saturation field andthen is suppressed. As we commented above, the magneticexcitation gap ∆ gradually decreases with approaching hs andvanishes at hs. At the saturation field, the energy dispersionof the magnetic excitations is linear in the momentum, which
represents the system is at a critical point. Above hs, theexcitations acquire a finite gap again and the gap increases
linearly in hx at higher fields.
The strong enhancement in the transition temperature near the saturation field arises from quantum criticalfluctuations there and the nature of the fluctuations strongly
restricts symmetry of the Cooper pairs. Analyzing thefluctuations near the saturation field, we find that theexchanging magnetic fluctuations between two electrons(Cooper pair) leads to electron spin flipping. Combining thefact that the Zeeman effects favor the equal-spin pairs andnow the spin is not conserved in the presence of the transverse field, the dominant superconducting order parameteris a linear combination of the two equal-spin pairing states.
This state is completely different from that in the low field
superconducting state, where only one of the equal-spin
pairing states is realized due to the strong Zeeman effects by
the ferromagnetism.
The phase diagram we have determined is qualitatively
consistent with that in URhGe. Experimental determinationof the superconducting order parameters near the saturation
field is an interesting subject in the future progress for understanding the ferromagnetic superconductivity in URhGe.
For more quantitative analyses, it is important to include
longitudinal spin fluctuations, which have been observedin UCoGe. Such longitudinal fluctuations would play animportant role for realizing meta-magnetic behaviors near thesaturation field in URhGe.

The first-principles computational methods have enabled,with increasing precision, to elucidate properties of mattersstarting from the microscopic quantum principles only.
This was strongly driven by the development of supercomputers and the computational theory, e.g., density
functional theory (DFT) and Hartree-Fock. Those theories
have already matured and great many efforts are now madetoward the development of post-DFT theory and the extension of the frontier of DFT applications. Towards the goal,
our group has made three important steps. The first one isthe development of a post-DFT scheme, which is based on
the tensor compression technology to compactly represent
the many-body wave function. A graduate course student,
Wataru Uemura, showed that the canonical decomposition
algorithm indeed greatly facilitates handling of the wave
function that appears in the full configuration interaction(CI) scheme. The developed scheme [1], called symmetrictensor decomposition (STD), is considered make the full
CI a method of choice for the molecular and some of thecondensed matter researches.
The use of the tensor compression technology itself is
not new, but was established as a powerful method to handle
one-dimensional spin and Hubbard systems some years
ago. The STD-CI, however, applied the technology to theconventional molecular orbital theory and, with algorithmic
improvements, has greatly reduced the memory and thecomputational time requirement. It is also anticipated that,by combining STD-CI with the tensor network theory developed in the spin physics, extended systems will become thetarget of study. Despite the improved efficiency, the computational time is yet prohibitively large even for mediumsized molecules, but is expected to become tractable by thenext-generation supercomputers because of its excellent
parallelizability.
Towards the study of electronically excited states, theresearch associate, Yoshifumi Noguchi parallelized the codefor many-body perturbation theory, or a post-DFT theory, for
the K-computer and the ISSP supercomputer. The excitedstates of a molecule containing up 100 atoms, such as fullerenes, has become the target of study [2]. By combining with
the DFT-based schemes [3], we are advancing the method for
excited-state research.
Our group regards the solid-liquid interface is the important application field of DFT. We are particularly interested

Reference[1] K. Hattori and H. Tsunetsugu, Phys. Rev. B 87, 064501 (2013).
Authors
K. Hattori and H. Tsunetsugu

Fig.1: An electronic wave function has been traditionally expanded
by non-interacting terms (Φ0) in the configuration interaction (above).
The series can be greatly shortened when expanded by interacting ones
(below). The tensor decomposition provides a practical way to constructa maximally compact series, allowing thereby accurate numerical
handling of the wave function. Using this novel algorithm, or STD-CI,
we are developing a code for electronic structure calculation to be usedin the next-generation supercomputer.

ISSP Activity Report 201211

in explaining the energy conversion mechanism as typified
by the fuel-cell reactions. The major object of the fuel-cellscience is to relate the bias potential with the electrocatalytic reactions, which has been hampered by the difficultyof applying the bias potential to the interface. Importantalgorithmic improvements were made by the collaboration
with research group in AIST to keep applying the bias potential throughout the DFT-based molecular dynamic simulation[4]. Those methods are now used for the large-scale simulations on K-computer.
References[1] W. Uemura and O. Sugino, Phys. Rev. Lett. 109, 253001 (2012).
[2] Y. Noguchi, O. Sugino et al., J. Chem. Phys. 137, 24306 (2012).
[3] T. Tsukagosi et al., Phys. Rev. B 87, 35421 (2012); Phys. Rev. A
86, 64501 (2012).
[4] N. Bonnet et al., Phys. Rev. Lett. 109, 266101 (2012).
Authors
O. Sugino, Y. Noguchi, N. Bonnet, T. Tsukagoshi, and W. Uemura

Relaxor Behavior and Morphotropic
Phase Boundary in a Simple Model
Kato Group
Ferroelectric relaxors made from perovskite oxides(ABO3) have attracted much interest because of their characteristic dielectric properties suitable for application. The
common feature of perovskite-type relaxors is intrinsic
randomness due to compositional disorder. It is well known
that structural phase transition induced by change in composition plays a special role for obtaining excellent dielectric
properties; the region near this phase transiton is called themorphotropic phase boundary (MPB).
The origin of large dielectric response at the MPB was
discussed within the Landau-Ginzburg-Devonshire (LGD)
theory. The LGD theory is, however, not satisfactory todescribe the whole properties of relaxors since it treats only
spatially-averaged quantities. In particular, important information on spatial profiles of electric polarization such as
domain structure and spatial inhomogeneity due to compositional disorder cannot be discussed by the LGD theory.
In order to understand physics near the MPB, we have
performed large-scale Monte Carlo simulation [1] to asimplified dipole model on a square lattice given as
μi･μj(μi･rij) (μi･rij)—-3— .
ℌ=
rij3
rij5
i<j

Σ[

]

Here, μi is a three-dimensional vector representing anelectric polarization caused by the ionic displacement at sitei, and rij is a displacement vector from site i to j. In orderto represent intrinsic compositional randomness at B-site
in perovskite oxides, we divide the square lattice into two
sub-lattices, A and B as shown in the inset of Fig. 1(a), andassume that magnitude of the A-site dipole moments is fixed
as unity (μA =1), whereas that of the B-site dipole moments
has spatial distribution. The magnitude of the B-site moment
is chosen randomly as μB = max(0.8-0.1n,0), where n is an
integer-valued random variable following the Poisson distribution P(n) = λn exp(-λ)/n!. We have performed Monte Carlocalculation by using efficient O(N) algorithm optimized forlong-rage interaction [2].
In Fig. 1(a), we show real part of calculated dielectricsusceptibilities as a function of the temperature T. The

12

ISSP Activity Report 2012

Fig. 1. (a) Plot of real part of dielectric susceptibilities per site. Data
are horizontally shifted for each value of λ. (Inset) Blue and red circles
indicate A- and B-sublattice on a square lattice. (b) A snapshot of dipole
configurations for λ=6. Sizes of radii represent sizes of projected dipole
moments, and colors of circles indicate directions of dipole moments.

peak of the dielectric susceptibility is well suppressed forsmall λ, whereas it rapidly grows with increasing λ. The
maximum value becomes largest at an optimum value λ=5-6,
and is reduced for larger value of λ. These features wellresemble the behavior of the dielectric response near MPB in
perovskite oxides, identifying λ=5-6 to be the MPB.
To examine mechanism of emerging of the maximum,a snapshot at λ=6 is shown in Fig. 1(b). We observemeso-scale ferroelectric domain, whose size becomessignificantly large near λ=5-6. This remarkable enhancementof correlation length for ferroelectric ordering, indicatedfrom the snapshot, is due to phase competition. For small
λ, anti-ferroelectric phase is stabilized at low temperatures,
whereas relaxor ferroelectric phase is realized for large λ.
Direction of polarization is diagonal in the former phase,and is along neighboring sites in the latter phase. As a result,the easy-axis potential is mixture of the ones of these twophases near the MPB (λ=5-6). The resulting mixed potential
forms the dimple at the bottom of a wine bottle, and it makes
dipoles easy to rotate. This result indicates that local polarization rotation under suppressed anisotropy makes domain
wall flexible to external field, leading to huge dielectric
response.
In summary, we proposed a simple dipole model, andexecuted Monte Carlo simulations to it. We showed that there
appears a boundary ferroelectric phase between two phases,
and that it has large ferroelectric domains with flexible walls.
Our result near the MPB can be related to recent experimentsby neutron scattering [3] and transmission electron microscopy [4].

References[1] Y. Tomita and T. Kato, J. Phys. Soc. Jpn. 82, 063002 (2013).
[2] K. Fukui and S. Todo, J. Comp. Phys. 228, 2629 (2009).
[3] M. Matsuura, K. Hirota, P. M. Gehring, Z.-G. Ye, W. Chen, and
G. Shirane, Phys. Rev. B 74, 144107 (2006).
[4] K. Kurushima and S. Mori, Materials Science and Engineering 18,
092015 (2011).
Authors
Y. Tomitaa and T. Katoa
Shibaura Institute of Technology---Division of Nanoscale Science--------------------------

Corbino Thermopower of
Quantum Hall Systems
Iye Group
Thermopower is known to be a sensitive probe to investigate properties of electron systems, owing to its direct accessto the energy derivative of the density of states (DOS) andto the entropy of the systems. It has been predicted [1, 2]
that the radial thermopower Srr measured in the Corbino
geometry (Fig. 1b) exhibits behaviors qualitatively different
from the longitudinal thermopower Sxx measured in theHall-bar geometry in the quantum Hall (QH) systems.
Notably, in the QH plateau regions where the longitudinal
conductivity σxx=σrr vanishes, Sxx also vanishes, whereas Srr
is expected to take large values changing sign at the centerof the QH plateau. The measurement of Srr thus provides us
with a unique opportunity to probe the entropy of the systemin the QH plateau regions [2]. The measurement of thermopower in the QH systems, however, has predominantly been
performed on the Hall-bar geometry. In the present study, we
make measurements of the diffusion thermopower Srr in the
Corbino geometry [3].
Thermopower generally contains contributions from two
distinct mechanisms: diffusion and phonon drag. In the QH
systems embedded in GaAs/AlGaAs wafers, it is well known
that the latter contribution outweighs the former by orders ofmagnitude, if the temperature gradient is introduced by an
external heater. The high sensitivity to the DOS and entropy,
however, is expected only for the former. In order to measure
the diffusion contribution selectively, we employ microwaveheating technique [4] (Fig. 1a) in the present study; microwaves injected into the coplanar wave guide (CPW) placedon the surface of the wafer capacitively couple with thetwo-dimensional electron gas (2DEG) beneath the slots of
the CPW and locally heats the electrons. The lattice tempera-

Fig. 2. Thermopower Srr (left axis) and the conductivity σrr (rightaxis) measured in the Corbino device. Vertical dashed lines indicate thepositions of the center of the QH plateau (exact even integer fillings ν).

ture remains intact, eliminating the phonon-drag contribution. As depicted in Fig. 1b, we install CPW along theouter periphery of a Corbino disk, which introduces radial
temperature gradient toward the center electrode, leading to
the radial thermopower Srr.
The measured Srr is plotted in Fig. 2 along with σrr
obtained in the same Corbino device. As can be seen in the
figure, Srr takes large values (~ ±1 meV/K) in the regions
where σrr = 0, alternating the sign at exact even integer
fillings marked by vertical dashed lines, in accordance withthe theoretical prediction mentioned above. Noting that Srr
represents entropy per carrier [2], large values of | Srr | can beunderstood as reflecting the fact that only small numbers ofthermally activated carriers are available in the QH plateau
regions. The positive (negative) sign of Srr indicates that thecarriers are hole-like (electron-like) for the fillings ν justbelow (above) integer values.
References[1] H. van Zalinge, R. W. van der Heijden, and J. H. Wolter, Phys. Rev.
B 67, 165311 (2003).
[2] Y. Barlas and K. Yang, Phys. Rev. B 85, 195107 (2012).
[3] S. Kobayakawa, A. Endo, and Y. Iye, J. Phys. Soc. Jpn. 82, 053702(2013).
[4] A. Endo, T. Kajioka, and Y. Iye, J. Phys. Soc. Jpn. 82, 054710(2013).
Authors
S. Kobayakawa, A. Endo, and Y. Iye

Switching of Andreev Current
with Spin-Hall EffectKatsumoto Group

Fig. 1. Schematic diagrams of (a) coplanar wave guide (CPW) used in
the microwave-heating technique and (b) Corbino device to measure
diffusion thermopower Srr. IC: inner contact. OC: outer contact. The
microwaves (rf) propagating through the CPW placed on the surface
are partially absorbed by the two-dimensional electron gas (2DEG)
underlying the slot of the CPW and heats the electrons. In the Corbino
device, electrons near the outer periphery of the disk are heated by the
CPW, generating the concentric temperature gradient toward IC.

Two-dimensional electron gas (2DEG) in InAs quantum
well has been often adopted as a material for middle layers
in Superconductor-Normal conductor-Superconductor (SNS)sandwiches due to its low Schottky barrier to metals. At
the same time it is well-known that the spin-orbit interaction (SOI) is generally strong in such materialswith narrow
band gaps and InAs 2DEG actually shows spin-interference
phenomena due to strongRashba-type SOI. The spin Hall
effect originates from the SOI draws apart a spin up-downpair of electrons to form a Cooper pair, thus is supposed towork against the Andreev reflection, and to affect the SNStransport or the Andreev bound states (ABSs) formed in thenormal layer.

ISSP Activity Report 201213

Here we report suppression of electric current enhanced
by Andreev reflection with transverse current flow, which
breaks the time-reversal symmetry in two-dimensional
system (2DES) of InAs. The inset of Fig.1 schematically shows the sample structure, in which a 200nm wide
InAs 2DES stripe is sandwitched by two Nb electrodes.
The sample was cooled down to 0.5K. During the electricmeasurement, we kept the crossing point of Nb and InAs
2DES at the ground level. In order for that, we formed
circuits for sweeping the potentials of the four terminals
assuming Ohmic contact resistances.
At zero magnetic field and with no transverse current,
the differential conductance oscillates with the source-drain
voltage Vsd making a large peak structure at the origin. The
characteristic lineshape can be interpreted with assuming theformation of ABSs as follows. The zero-bias peak reflects
the resonance between the two Fermi levels of superconducting electrodes via the virtual tunneling through ABSs
while the two side peaks are direct resonances between oneof the superconductors and an ABS. Because the mean freepath of InAs 2DES exceeds the width of the 2DES strip, thetransport between the two Nb electrodes should be ballistic,that is, ABSs should be formed.
In Fig.1(a) we show the response to the magnetic field,
in which the structure is squeezed to the origin and disappears at 0.75T. This behavior manifests that the structure
is superconductivity origin and we can explain it withconsidering some kind of interference effect. Because theadditional phase due to the voltage accumulates for Andreev
type (electron-hole) shuttling, the Aharonov-Bohm (AB)phase should shift the positions of ABSs. Figure 1(b) shows

Fig. 1. (a) Differential conductance of Nb-InAs-Nb SNS junction at
0.5K as a function of the source-drain bias voltage. The parameter is theexternal magnetic field perpendicular to the sample. The inset shows
schematic view of the sample. (b) The same measurements as those in(a) under zero magnetic field with transverse currents through the InAs
strip from zero to 1.2μA.

14

ISSP Activity Report 2012

the differential conductance (G) again as a function of Vsd
with the transverse currents through the InAs 2DES strip
from 108 nA to 1.2 μA. The transverse current also strongly
diminishes the G-Vsd structure. The difference between the
response to the magnetic field and that to the transverse
current is apparent. This suggests that the latter comes notfrom the orbital effect and that the spin-Hall effect inducedby the transverse current reduces the formation of ABSs.
Reference[1] Y. Takahashi, Y. Hashimoto, Y. Iye, and S. Katsumoto, J. Cryst.
Growth, published online: http://www.sciencedirect.com/science/
article/pii/S0022024813000705.
Authors
S. Katsumoto, T. Nakamura, and Y. Hashimoto

A Novel Method to Verify Spin Diffusion Length
Otani and Kato Groups
Spin relaxation and spin dephasing are the central issues
in fields of quantum information and spintronics as they
determine how far an electron can transfer spin information,i.e., the spin diffusion length. The spin diffusion length isthus an essential parameter in terms of application in future
spintronics devices. However, there is no well-establishedmethod for obtaining this length; values reported so far differ
greatly depending on the experimental method employed,
the number of variables involved in the definition of the spin
diffusion length and so on. Since the spin diffusion length
determines the spin Hall angle, which is one of the mostimportant physical quantities in spintronics, it is of great
importance to evaluate this length correctly.
In a conventional method, a lateral spin valve structure
where a weak spin-orbit (SO) material such as Cu is bridged
by two ferromagnets is used to determine the spin diffusion
length. On the other hand, this conventional method cannot
be applied to a strong SO material such as Pt, since the spin
diffusion length is in general of the order of nanometers.
One of the ways to obtain such a short spin diffusion length
is to use the spin absorption technique as shown in Fig. 1(a)[1]. However, there was a big debate about how to evaluate
the spin diffusion length of a strong SO material [2] because
there are several parameters that determine the spin diffusion
length, which hinders straightforward evaluation.

Fig. 1. (a) Nonlocal spin valve (NLSV) signal with a 20 nm thick Ptwire (∆RSwith) in between two Permalloy (Py) wires. As a reference
signal, we also plot the NLSV signal without the Pt wire (∆RSwithout).
The magnetic field is applied parallel to the Py wires. From the ratio of∆RSwith/∆RSwithout, the spin diffusion length of Pt can be evaluated (LS= 11±2 nm). A pair of arrows on the top indicates the magnetizationsof Py1 and Py2. The inset shows the schematic of our lateral spin valve
device. (b) WAL curve of a 20 nm thick Pt wire measured at T = 3 K. In
this case, the magnetic field is applied perpendicular to the plane. The
broken line is the best fit of Hikami-Larkin-Nagaoka formula. From thefitting, the SO length of Pt can be obtained (LSO = 12±3 nm).

Fig. 2. Spin diffusion lengths measured with ferromagnets (LS; left) andobtained from WAL—
measurement (LSO; right). The relation of the twolength scales (LS = √ 3 / 2 LSO) has been experimentally verified.

Otani group in collaboration with Kato group havediscovered a new way to evaluate the spin diffusion length[1]. In the new method, the spin diffusion length can beevaluated just by measuring very precisely the resistance ofa SO material (see Fig. 1(b)). In metals, electrons are weakly
localized at temperatures approaching absolute zero. When
there is a finite SO interaction, the weak localization changes
into weak antilocalization (WAL) and the magnetoresistance strongly depends on the SO interaction. In the present
work, we focused on this dependency and obtained the spin
diffusion lengths of several materials such as Cu, Ag and Pt.
The values obtained with the new method are quantitatively
consistent with those from the conventional methods. Since
the new method reduces the number of variables involved
in determining spin diffusion length, a more accurate value
can be calculated. In addition, it has been shown theoretically that the spin diffusion length in a localized state andunder— ferromagnetic conditions varies slightly (by a factorof √ 3 / 2). We have experimentally verified for the first time
the relationship between the spin diffusion length in a localized state and under ferromagnetic conditions (see Fig. 2).
Thanks to these results, a vigorous debate on the spin diffusion length can be concluded and this new method will play
an important role in the fields of quantum information andspintronics.
Reference[1] Y. Niimi, D. H. Wei, H. Idzuchi, T. Wakamura, T. Kato, andY. Otani, Phys. Rev. Lett. 110, 016805 (2013).
[2] L. Liu, R. A. Buhrman, and D. C. Ralph, arXiv:1111.3702.

Fig. 1. (a) ARPES intensity map showing the band structure of the
Au-adsorbed the Ge(111) surface. Three surface bands S1, S2 and S5
are seen, and white dashed lines are guides to the eye for the S1 andS2 bands. (b) Schematic top-view CHTC model for the Au-adsorbed
Ge(111) surface. The white hexagonal lattice indicates the subsurface bilayer Ge lattice, the small blue balls the lower Ge atoms of
the bilayer, small green the upper Ge atoms of the bilayer, yellow thesurface Ge atoms, and red the surface Au atoms. Three adjacent Au
atoms make an Au trimer, which is imaged as a single protrusion in
Fig. 2(a). Centers of three adjacent Ge atoms are imaged as protrusions
in Fig. 2(b), and make a honeycomb pattern, which is indicated as themagenta hexagon.

chained-trimer (CHCT) structure model shown in Fig. 1(b)[2]. However, there have been two discrepancies between
the experiments and theories; the STM image at low bias
voltage (Vsb) and the bottom energy of the S1 band. In thepresent study, we clarify how these are solved by considering
the surface electronic structure and the doping by triangularnanoclusters observed on the surface.
Figure 2 shows bias-dependent atomic STM images.
The images were observed at 80 K for the surface with 1.2
ML of Au atoms on average. The STM image for Vsb = 2.0
V (Fig. 1(a)) shows a triangle lattice pattern with a triangular nanocluster. For Vsb = 0.1 V (Fig. 1(b)), a honeycomb
pattern appeared on the same surface area, and the positionof the triangular nanocluster was imaged as a dented area.
The triangle lattice is consistent with the arrangement of the
Au trimers on the surface in the CHCT model shown in Fig.

Authors
Y. Niimi, D. H. Wei, H. Idzuchi, T. Wakamura, T. Kato, and Y. Otani

Bias-Dependent Atomic STM Images
and Electronic Structure at
Au-Adsorbed Ge(111) Surface
Komori GroupThe Au-adsorbed Ge(111) surface has two surface
metallic bands with hexagonal Fermi surfaces [1]. One bandis electron-like and the other is hole-like. The former bandis anisotropically split and spin-polarized owing to strong
spin-orbit interaction at the surface. These features havebeen studied by angle-resolved photoemission spectroscopy(ARPES). Figure 1(a) shows the ARPES intensity map
along Γ0 − M − Γ1 line for the surface with 0.9 ML of Au on
average. The observed electronic states including the surface
bands (S1, S2 and S5) are qualitatively consistent with thebands calculated for an optimized conjugate honeycomb-

Fig. 2. STM images of the Au-adsorbed Ge(001) surface showing
sample-bias-voltage (Vsb) dependence. Triangle lattice pattern in (a)is attributed to the arrangement of the surface Au trimers. (See Fig.
1(b)). In (b), atomic protrusions arrange in a honeycomb pattern. The
same area is imaged in (a) and (b). A triangular nanocluster is seen as aprotrusion in (a) while it is imaged as a dented area in (b). The precise
bias dependence of the lattice pattern and the triangular nanocluster
is shown in (c-h) and (i-n). Both the triangle and honeycomb patterns
coexist for Vsb = 0.5 V as in (f). The triangular nanocluster becomesthin with decreasing Vsb.

ISSP Activity Report 201215

1(b) whereas the honeycomb pattern could not be attributed
to any arrangement of the surface Au and Ge atoms in themodel. Bias-dependent STM images shown in Figs. 2(c-h),and 2(i-n) indicate gradual change of the lattice pattern andthe triangular nanocluster, respectively.
It was theoretically shown that the surface Au trimersof the CHCT model make the electron-like (S1) band. The
hole-like (S2) band, on the other hand, originates from thesurface and subsurface Ge atoms. The energy maximum of
the S2 band is 0.1 eV above Fermi energy. Consequently, thelocal density of states around the surface Ge atoms can behigh at the top energy of the S2 band. This causes a honeycomb lattice pattern of the protrusions due to the surface Ge
atoms in the STM images as observed for Vsb < 0.3 V. The
bottom of the S1 band decreases with increasing the surface
density of the triangular nanocluster. It plays a role of thedopant selective to the S1 band although its atomic structureis unknown [3].
References[1] K. Nakatsuji et. al., Phys. Rev. B 80, 081406 (2009).
[2] K. Nakatsuji et. al., Phys. Rev. B 84, 035436 (2011).
[3] K. Nakatsuji et. al., J. Phys. Condens. Matter 25, 045007 (2013).
Authors
K. Nakatsuji, Y. Motomura, R. Nikura, and F. Komori

Development of Versatile Nanoscale
Potentiometry for Visualizing
Distribution of Electrical Resistance
Hasegawa GroupScanning tunneling microscopy (STM) has been utilized
for imaging atomic structure of surfaces. Combined with afunction of tunneling spectroscopy, the probe microscopy
can also visualize spatial distribution of various properties in nanoscale; superconductivity has been detected andvisualized through the observation of the superconducting
gap. A spin-polarized probe tip picks up signals of local
magnetization, and inelastic tunneling provides the energyof spin flipping and transition between spin states of atomic
and nanosize systems. Here, we introduce another uniquefunction of STM; mapping of electrical potential and resistance in nanometer-scale spatial resolution.
The method called scanning tunneling potentiometry
enables us to observe spatial distribution of the the potentialof a sample surface under current flow across the sample,
as well as its topographic STM image. Under current
flow, which is 1 ~ 2 mA in the present case, the potential or the Fermi level changes locally at the places where
electrical resistance there. Figure 1 shows an example ofthe topographic and potential images taken simultaneously
on a 2-mm-wide and 2-nm-think Au thin film. As shownin the topograph, Au grains whose size is 10 to 30 nm are
randomly distributed. The potential image, however, clearly
reveals steps in the potential, which provide direct evidenceof significant resistance there. The sites of the drops exactly
correspond to boundaries between the Au grains, as provedby a comparison of the two images. Not all domain boundaries, however, induce the potential drop, although theboundaries that induce the potential drops do not show any
structural differences discernible in the STM image fromthose that do not induce the drops. We confirmed that the16

ISSP Activity Report 2012

Fig. 1. STM image of a 2-nm-thick Au thin film and its potential
mapping taken simultaneously under current flow (1~2 mA) from thebottom to the top of the images. A cross-sectional plot of the potential
indicates that potential drops, which correspond to electrical resistance,
occurs at grain boundaries and that the potential can be measured with aresolution of ~5 μV.

observed drops are really due to the electrical potential bytaking the images under the reversed current flow across the
sample; the direction of the potential drops is also reversedwith the reversed current. The reversed potential image also
indicates that the sites and magnitude of the potential drops
do not change significantly in the both directions of thecurrent flow.
The magnitude of the potential drops can be estimatedas ~ 40 μV from the cross-sectional plot shown in Fig. 1(c).
The plot also indicates that the noise level of the potential is~ 5 μV even at room temperature. The resolution is quite
high compared that of other STM-related potential measurement methods, such as Kelvin probe force microscopy, withwhich we detected interatomic charge transfer [1], and themethod of measuring energy levels of electronic states thatwas used for visualizing the Friedel oscillation [2]. The
reason of the high resolution is because of the zero-balancemethod used in the potential measurement; the potential ismeasured from the voltage applied on the sample to make thetunneling current zero.
One drawback is that the method can only be applied tometallic samples; in the case of semiconducting samples, thetunneling current is zero within the band gap and therefore
the bias voltage that makes the tunneling current zero cannot
be determined with high energy sensitivity. In this work,
we have developed a new method with which one can takea potential mapping on semiconducting samples [3], which
will obviously extend versatility of this technique.
We are applying the method to study potential profiles
on surface conductive layers, which are the ultimate
two-dimensional electron systems. Superconductivity evenon one-monolayer-metal-induced reconstructed surfaces wasreported. Our study will reveal roles of various structuraldefects on the (super-) conductance in real space. By usinga spin-polarized tip, one can also detect spin current since
the dispersionless current is caused by the potential difference between the two spin directions. We expect that various
spin relaxation processes will be identified in real space andattributed to local structures using this method.

References[1] T. Eguchi, et al., Phys. Rev. Lett. 93, 266102 (2004).
[2] M. Ono, et al., Phys. Rev. Lett. 96, 016801 (2006).
[3] M. Hamada and Y. Hasegawa, Jpn. J. Appl. Phys. 51, 125202(2012).
Authors
M. Hamada and Y. Hasegawa

Oxide Photocatalysts
Lippmaa Group
Perovskite-type titanates have been proposed as potentially efficient photocatalytic energy conversion materials
that can absorb visible sunlight and directly transfer theformed photocarriers to liquid water, thereby generatinghydrogen gas. Despite the potential for efficient, cheap, andsustainable energy conversion, photocatalytic materials haveso far not reached practical solar light collection efficiencies.
The main reason appears to be the high recombination rate ofgenerated photocarriers, which means that the energy of thesunlight is mostly spent on generating heat, rather than splitting water. The purpose of this work was to determine theelectronic structure of Rh-doped SrTiO3, which is known to
be a moderately efficient hydrogen-evolution photocatalyst.
For efficient transfer of photoelectrons from a bulk
photocatalyst to water, it is necessary to have a semiconductor with a conduction band located well above the reduction potential of water, while the band gap should be close to
2 eV for the best energy harvesting efficiency. Pure SrTiO3
is a wide-gap semiconductor that satisfies the conduction
band alignment requirement with water, but it is transparent
for visible light and only absorbs sunlight in the ultraviolet
part of the spectrum, above the band gap energy of 3.2 eV.
Rhodium doping of the SrTiO3 host semiconductor appears
to be quite special, in that it creates deep impurity levels
either around the mid-gap region of SrTiO3 or close to the
top of the valence band without affecting the location of the
conduction band edge. Electrochemical measurements undervisible light show an apparent p-type photocathode behavior,
which is quite unusual for typically n-type SrTiO3. In thiswork, we have used a combination of x-ray photoelectron
spectroscopy (XPS) at Photon Factory beamline 13A andx-ray absorption (XAS) and emission (XES) spectroscopy at
the undulator beamline BL07LSU in SPring-8.

Fig. 2. (a) X-ray emission spectra of various Rh-doped SrTiO3 samples
showing the presence of an occupied Rh state close to the top of thevalence band of SrTiO3. (b) Illustration of the XES process and thelocation of the Rh donor levels just above the SrTiO3 valence bandedge.

The XPS experiments were used to investigate the violetto-yellow color change reaction that occurs when Rh:SrTiO3
is reduced, typically during the initial induction period ofan electrochemical reaction. SrTiO3 thin films with several
different Rh doping levels were grown at various temperatures and ambient oxygen pressures. The Rh 3d XPS profile
analysis showed that the color shift is caused by a change
in the Rh impurity valence, with Rh4+:SrTiO3 being violet
and Rh3+:SrTiO3 yellow [1]. Significant variations werealso observed in the Rh content at the catalyst surface due toevaporative loss of Rh at high crystal growth temperatures.
A more detailed analysis of the in-gap energy levels wasundertaken by XAS and XES analysis of powder samples.
The XAS analysis, which probes unoccupied states, wasused to show that a mid-gap unoccupied state appears only
in samples containing the Rh4+ valence state, as illustrated
in Fig. 1. Reduced Rh3+:SrTiO3 powders did not show a
mid-gap state. Both Rh valence states lead to the appearanceof an occupied impurity level close to the top of the valenceband, as shown by XES spectra in Fig. 2. In addition to anincrease of spectral weight with Rh doping just above thevalence band top, a shift was observed in the locations of theRh4+ and Rh3+ impurity levels. A conclusion of the analysis
was that the Rh3+:SrTiO3 material shows higher photocatalytic activity due to the lack of a mid-gap unoccupied energy
level that would lead to rapid photocarrier recombination.
However, the photogenerated charge collection efficiency islimited by the lack of strong hybridization between the deep
Rh levels and the O2p character valence band of SrTiO3.
References[1] S. Kawasaki, K. Nakatsuji, J. Yoshinobu, F. Komori, R. Takahashi,
M. Lippmaa, K. Mase, and A. Kudo, Appl. Phys. Lett. 101, 033910(2012).
[2] S. Kawasaki, K. Akagi, K. Nakatsuji, S. Yamamoto, I. Matsuda,
Y. Harada, J. Yoshinobu, F. Komori, R. Takahashi, M. Lippmaa,
C. Sakai, H. Niwa, M. Oshima, K. Iwashina, and A. Kudo, J. Phys.
Chem. C 116, 24445 (2012).

Fig. 1. Photographs of Rh4+:SrTiO3 and Rh3+:SrTiO3 pellets showing
the different colors and the Rh in-gap state locations relative to thevalence and conduction band edges of SrTiO3. The yellow Rh3+:SrTiO3
is photocatalytically more efficient due to the lack of a mid-gap recombination state.

Authors:
S. Kawasaki, K. Nakatsuji, S. Yamamoto, I. Matsuda, Y. Harada,
J. Yoshinobu, F. Komori, R. Takahashi, M. Lippmaa, K. Akagia, C.
Sakaib, H. Niwab, M. Oshimab, K. Masec, K. Iwashinad, and A. Kudod.
aTohoku Universityb
Department of Applied Chemistry, University of TokyocHigh Energy Accelerator Research OrganizationdTokyo University of Science

ISSP Activity Report 201217

---Division of Physics in Extreme Conditions-----------

Pressure-Induced Heavy Fermion
Superconductivity in the Nonmagnetic
Quadrupolar System PrTi2Al20
Uwatoko and Nakatsuji Groups
Unconventional superconductivity (SC) with a variety of
exotic characters such as anisotropic superconducting gap,
large critical field and effective mass, reentrant SC, FFLO
SC, etc. has attracted much attention in condensed matterphysics. Since most of these unconventional superconductors have been found near a magnetic quantum criticalpoint (QCP), where the magnetic ordering temperature issuppressed to zero due to the Kondo effect, the interestingquestion is what would happen near the QCP of orbital order.
Although, there have been some theoretical suggestions
that orbital fluctuations play an important role in iron based
superconductors, it is hard to study experimentally because
orbital degree of freedom is strongly coupled with spin andcharge degrees of freedom in d-electron compounds. In
contrast, pure orbital degree of freedom sometimes appears
as a quadrupole moment in f-electron compounds such asnonmagnetic Γ3 state in cubic Pr or U based compounds
The cubic Γ3 compound PrTi2Al20 has demonstrated theinterplay of a ferroquadrupole order at TQ = 2 K and Kondo
effect through the strong c-f hybridization [1]. Furthermore,
it exhibits SC at TSC = 0.2 K with the associated enhanced
effective mass ~16 m0 [2]. Here we report the discovery ofa pressure-induced heavy fermion superconductivity in anonmagnetic orbital ordering system PrTi2Al20. In particular,
we found that the transition temperature and the effective
mass associated with the superconductivity are dramaticallyenhanced to more than 100 m0 as the system approaches theputative quantum critical point of the orbital order [3].
Figure 1(a) shows the temperature dependence of themagnetic resistivity ρmag measured under various pressures.
At high temperatures, the Tmax due to the magnetic Kondo

Fig. 1. (a) Magnetic part of the resistivity, ρmag, versus the logarithmof the temperature under various pressures. Here, ρmag is obtained bysubtracting the resistivity of LaTi2Al20 obtained under ambient pressure
from that of PrTi2Al20. (b) Temperature dependence of the resistivity
and the ac magnetic susceptibility at low temperatures. A large diamagnetic signal due to the SC transition is observed at a lower temperature,
which corresponds to nearly 60% superconducting shielding, estimatedby comparing to the diamagnetic signal of lead with almost the same
size as the sample of PrTi2Al20. (c) Temperature dependence of the ac
specific heat divided by temperature for different pressures. The curves
are shifted vertically for clarity.

18

ISSP Activity Report 2012

Fig. 2. Open circles and squares represent the position of Tmax determined from the maximum in the temperature dependence of the resistivity and the ferroquadrupole ordering temperature TQ, respectively.
The SC transition temperatures TSC are deduced from the temperaturedependence of the resistivity (closed circles), the ac magnetic susceptibility (closed triangles), and the ac specific heat (closed squares),respectively. The inset shows the cubic crystal structure of PrTi2Al20.
Cages made by PrAl16 and TiAl12 are indicated in green (larger cages)
and purple (smaller cages), respectively.

effect using the excited magnetic CEF levels decreases withpressure, suggesting that pressure slightly reduces the CEF
splitting. At lower temperatures, the quadrupole ordering
temperature TQ = 2K at ambient pressure can be traced as a
sharp resistivity drop up to P = 4.5 GPa and shows a slightincrease with pressure. Surprisingly, above 6.7 GPa, anotheranomaly was observed at lower temperatures. The resistivity
shows an abrupt drop to zero at 0.7 K at 6.7 GPa, indicating
the onset of superconductivity. With further increasingpressure, the resistivity drop becomes sharper, and temperature of zero resistance increases up to 1.1 K at P = 8.7 GPa.
The observation of a large diamagnetic response in the ac
magnetic susceptibility at almost the same temperature as
the onset of the zero resistance state indicates that pressureinduced superconductivity is of bulk origin (Fig. 1(b)). To
further elucidate the interplay between the superconductivity and ferroquadrupole order, we measured the specificheat under pressure (Fig. 1(c)). At 1.6 GPa, the specific heat
divided by temperature C/T shows a peak due to the quadrupolar ordering at TQ ~ 2 K. With increasing the pressure,
TQ monotonically goes up to P = 5.5 GPa, however, further
increase of the pressure starts broadening and shifting thetransition to a lower temperature and instead induces awell-defined subsequent anomaly on cooling associatedwith the superconducting transition. The superconducting
anomaly appears at the temperature in full agreement withthose found in the resistivity and ac magnetic susceptibility
measurements, providing further evidence for the bulk superconductivity. Pressure-induced evolution of ferroquadrupolarand superconducting phases of PrTi2Al20 is summarized
in the temperature-pressure phase diagram (Fig. 2). Afterpeaking at P = 6 GPa, the ferroquadrupole ordering temperature becomes suppressed with significant broadening,
indicating the presence of the associated QCP.
At 8.7 GPa, a critical magnetic field Bc2 is estimated tobe more than 3 T, which is the highest value among Pr-based
heavy fermion superconductors and similar to the case foundin the Ce-based heavy fermion superconductors. Our resultssuggest a generic phase diagram hosting unconventional
superconductivity on the border of orbital order, paving a
new path for further research on novel quantum criticality
and superconductivity due to orbital fluctuations.
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).
Authors
K. Matsubayashi, A. Sakai, S. Nakatsuji, Y. Uwatoko, T. Tanakaa, andY. KuboaaNihon University

Surface Magnetotransport inQuantum Hall Ferromagnetic Phasein the Organic Dirac Fermion System
Osada GroupIn the 2D massless Dirac fermion systems with charge
neutrality, the ν=0 quantum Hall (QH) state appears at thehigh-field quantum limit, resulting from the breaking offour-fold (spin and valley) degeneracy of the n=0 Landaulevel. Two kinds of ν=0 QH states appear depending on
the ratio of spin splitting and valley splitting: One is the
spin-unpolarized QH insulating phase, and the other is the
spin-polarized QH ferromagnetic phase accompanied by
the metallic edge state consisting of a pair of n=0 QH edge
states with opposite spin and chirality (helical edge state).
The high-field ground state is one of the key issues of thephysics of the Dirac fermion system. In undoped graphene, it
has been believed that the high-field ground state is the QH
insulator.
On the other hand, the Q2D Dirac fermion system, inwhich 2D massless Dirac layers stack with weak interlayer coupling, is realized in a layered organic conductor
α-(BEDT-TTF)2I3 under pressures P>1.5GPa. We found theexperimental evidences that the high-field ground state is
the QH ferromagneric phase (Fig.1(a)) in α-(BEDT-TTF)2I3
in contrast to graphene. In α-(BEDT-TTF)2I3, the interlayer

Fig. 2. Interlayer resistance as a function of strength and orientation ofmagnetic fields. (a) calculation. (b) experiment in α-(BEDT-TTF)2I3.

magnetoresistance shows anomalous saturation at high fields.
The saturation resistance is scaled not by the sectional areaof sample crystals but by sample perimeter. These experimental facts strongly suggest the interlayer surface transport
due to the helical edge state on side surfaces of crystals. The
existence of the helical edge state directly means the QH
ferromagnet.
We have considered the mechanism of interlayer surface
transport due to helical edge state. Since the helical edge
state is not topologically protected, transport along thehelical edge channel must be diffusive due to spin-inversion
scattering. So, we can assume that the interlayer tunnelingoccurs less frequently than the scattering on the single
layer edge. In this case, the interlayer surface transport isdominated by the single tunneling process between the edge
states on neighboring two layers. The selection rule of thistunneling leads the shift of center coordinate x0 under finite
in-plane magnetic field Bx as shown in Fig.1(b). Therefore,
the interlayer tunneling is allowed only when the magnetic
field is parallel to the side surface of the crystal (Bx =0).
Figure 2(a) shows the calculated interlayer resistanceRzz, which includes the bulk contribution, as a function ofstrength and orientation of magnetic fields. We can see thatRzz shows the saturation when the magnetic field is swept
in the vertical direction, but shows monotonous increasein other directions. Fig. 2(b) shows the measured interlayer resistance Rzz in α-(BEDT-TTF)2I3. The saturation
occurs when the magnetic field was parallel to the stacking
direction. Observed features are well explained by thecalculation. This agreement also indicates the appearance of
the QH ferromagnetic phase with the helical edge state inα-(BEDT-TTF)2I3.
Authors
T. Osada, M. Sato, T. Konoike, and K. Uchida

Fig. 1. (a) Helical edge state surrounding the ν=0 QH ferromagnet. (b)Edge state dispersion around the layer edge. Interlayer tunneling causes
the shift of x0.

ISSP Activity Report 201219

---Materials Design and Characterization Laboratory (MDCL)-----------------

Mn3+/Mn4+ Charge Order Driven by
K-Vacancy Order in Mn-Hollandite
Y. Ueda Group
Hollandite type oxides, K2M8O16 with a mixed valenceof M3+/M4+ =1/3 have intensively investigated, expecting
novel itinerant properties such as metal-insulator (MI) transition, charge order and so on. Actually, K2V8O16 was found toundergo the metal-insulator transition at 170K, accompaniedby the structural transition and charge order [1, 2]. A veryrare ferromagnetic MI transition was discovered in K2Cr8O16[3]. This MI transition is caused by a Peierls instability inthe quasi-one-dimensional column structure made of four
coupled Cr-O chains running in the c-direction, leading to
the formation of tetramers of Cr ions below the transition
temperature [4].
The crystal structure consists of the M8O16-frameworkand K-cations. The M8O16-framework is constructed fromthe double-chains (zigzag-chains) formed by sharing theedges of MO6 octahedra. The M8O16-framework has rectangular tubes surrounded by four double-chains, and K-cations
occupy the sites within each rectangular tube and act aselectron donor.
KxMn8O16 was prepared by high-pressure synthesis using
a cubic anvil press [5]. Unfortunately Mn-hollandite wasobtained only in K-deficient form. The maximum K-composition is x=1.6, in which K-vacancy molar fraction is 1/5 and
Mn3+ molar fraction is also the same 1/5. K1.6Mn8O16 is nota metal and a canted antiferromagnet with Néel temperatureof 50 K. Resistivity well obeys a one-dimensional variable
range hopping manner. K1.6Mn8O16 shows successive structural transitions of tetragonal to monoclinic at 370 K andmonoclinic to monoclinic at 250 K. The superlattice reflections with five-fold periodicity along the b-axis (tunnel direction) as shown in Fig. 1, are observed by electron diffractionof TEM (transmission electron microscope) below 250 K.
Such a five-fold periodicity is consistent with the fractionof K-vacancies, 0.4/2=1/5, suggesting vacancy-ordering at
250 K. At room temperature, similar but rather diffusive
super-reflections are observed. These results suggest that in
K1.6Mn8O16, the charge differentiation into Mn3+ and Mn4+
occurs even at higher temperature than at least 370 K and ashort range order of K-vacancies progresses below 370 K,
followed by a sudden long range order at 250 K. Such charge
differentiation in K1.6Mn8O16 could be due to K-deficiency,
because the fraction of Mn3+ is 1/5 which coincides with

Fig. 1. Electron diffraction pattern observed at 100 K and schematic
illustration of charge order between Mn4+ and Mn3+ for K1.6Mn8O16.
The electron beam incidence is along the [001] direction of themonoclinic lattice. The superlattice reflections with five-fold periodicity along the b-axis (tunnel direction) are clearly observed, indicating
K-vacancies ordering. The extra electrons are trapped by Mn ionsadjacent to K-vacancies, leading to charge order between Mn4+ and
Mn3+.

20

ISSP Activity Report 2012

the fraction of K-vacancies. Namely, extra eg-electrons aretrapped at Mn ions close to K-vacancies, giving rise to Mn3+
ions, namely an ordering between Mn3+ and Mn4+ takes
place in cooperation with K-vacancy ordering. An origin for
K-deficiency in hollandite manganese oxide could be in its
rather shorter b-axis compared with those of K2M8O16 (M =Ti, V, Cr). The electrostatic repulsion between K+ ions in thetunnel would not allow the full occupancy of K-sites. Much
higher pressure would be necessary for the synthesis of the
stoichiometric K2Mn8O16.
References[1] M. Isobe, S. Koishi, N. Kouno, J. Yamaura, T. Yamauchi, H. Ueda,
H. Gotou, T. Yagi, and Y. Ueda, J. Phys. Soc. Jpn. 75, 073801 (2006).
[2] A. C. Komarek, M. Isobe, J. Hemberger, D. Meier, T. Lorenz, D.
Trots, A. Cervellino, M. T. Fernández-Díaz, Y. Ueda, and M. Braden,
Phys. Rev. Lett. 107, 027201 (2011).
[3] K. Hasegawa, M. Isobe, T. Yamauchi, H. Ueda, J-I. Yamaura, H.
Gotou, T. Yagi, H. Sato, and Y. Ueda, Phys. Rev. Lett. 103, 146403(2009).
[4] T. Toriyama. A. Nakao, H. Nakao, Y. Murakami, K. Hasegawa,M. Isobe, Y. Ueda, A. V. Ushakov, D. I. Khomskii, S. V. Streltsov, T.
Konishi, and Y. Ohta, Phys. Rev. Lett. 107, 266402 (2011).
[5] T. Kuwabara, M. Iosbe, H. Gotoh, T. Yagi, D. Nishio-Hamane, andY. Ueda, J. Phys. Soc. Jpn. 81, 104701 (2012).
Authors
M. Isobe, H. Gotoh, D. Nishio-Hamane, and Y. Ueda

Interlayer Switching of Reductionin Layered Bi-V Oxide
Y. Ueda GroupThe pseudo binary oxide system Bi 2 O 3 -V 2 O 5 hasreceived considerable interest due to its wide structural
diversity and rich functional properties. Of particular interest
is Aurivillius phase Bi4V2O11 which is found exhibiting
remarkably high oxygen anionic mobility. Such a function
promises serious potential applications in many important
areas, e.g. solid oxide fuel/electrolysis cells and oxygen
sensors. The crystal structure of idealized Bi4V2O11 is built
up from infinite (Bi2O2)2+ sheets sandwiched between
oxygen deficient VO 4-Δ perovskite slabs (V-O layer).
Intrinsic oxygen vacancies (Δ = 0.5) in the V-O layer, which
is normally believed to enable high oxide ion conductivity, are located in both apical and equatorial sites of
VO6 octahedra randomly. Such a description represents a

Fig. 1. Interlayer Switching of Reduction from V-O layers to Bi-O
layers in Layered Oxide, Bi4V2O11-δ (0≤δ≤1). With increasing oxygen
deficiency in Bi4V2O11-δ, the reduction of Bi4V2O11-δ first proceeds inthe V-O layers, but beyond δ=0.4, suddenly switched to the Bi-O layers
by precipitation of metallic bismuth, retaining a molar ratio of V4+/V5+= 2/3, namely the relation between bismuth and oxygen deficiencies isexpressed as x = 2δ/3 - 4/15 in Bi4-xV2O11-δ (0.4≤δ≤1).

---Neutron Science Laboratory----------------widely accepted prototype structure for the high temperature
γ-phase. With decreasing temperature, Bi4V2O11 undergoes
two consecutive and reversible phase transitions, γ→β and
β→α at 553 and 386 ºC, respectively, due to the long range
oxygen vacancy ordering process.
The oxygen-vacancy-disordered γ-phase reminds usthat there might exist a rich phase diagram in the oxygen
deficient system where a wealth of unknown phases would
be expected. Moreover, Bi4V2O11-δ is of particular interestas the two-dimensional square lattice enables Aurivillius afavoured structure carrier of novel quantum properties. A
full phase diagram for the Bi4V2O11-δ (0≤δ≤1) system wasbuilt for the first time by examining the whole spectrumof composition [1]. One structure (α-phase) related to theestablished Bi4V2O11 phase survives in a very narrow δ
range (≈ 0.1) whereas the other structure type (A-type) with
its parent phase Bi4V2O10.6 shows unusual robustness from
δ=0.4 until δ=1 (0.1<δ<0.4: two phase mixture). Surprisingly, the decreasing oxygen stoichiometry in this structural
region is found to be accommodated not by lowering thevalence of vanadium as would be expected, but instead by
reducing bismuth. It means the Bi site is favored over the Vsite upon reduction. This conclusion was further strengthened by the measurements of magnetic susceptibility overdifferent compositions. All samples (0.4≤δ≤1) show thesimilar behavior that is characteristic of a one dimensional
S = ½ antiferromagnetic Heisenberg chain model. The rigid
V-O unit shared by all compositions between δ=0.4 and 1 isthus responsible for the robustness of the second type structure in the current phase diagram. In situ XRD investigations
as a function of temperature provided strong evidence for the
existence of three allotropic forms, which are α, β and γ for
the Bi4V2O11 type and A, B and γ for the Bi4V2O10.6 type.
When heated to 570ºC or higher temperature, all compositions become uniform by forming the same tetragonal γphase.
These results means that the reduction of Bi4V2O11-δ
first proceeds in the V-O layer, but beyond δ=0.4, suddenly
switched to the Bi-O layer by precipitation of metallic
bismuth, retaining a molar ratio of V4+/V5+ = 2/3, namely
the relation between bismuth and oxygen deficiencies isexpressed as x = 2δ/3 - 4/15 in Bi4-xV2O11-δ (0.4≤δ≤1).
With a larger amount of intrinsic disordered oxygen
vacancies, γ-Bi4V2O11-δ phases, particularly γ-Bi3.6V2O10
hold great potentials in offering optimized ionic conductivity.
On the other hand, given the interesting defect chemistry
and electromagnetic properties, this oxygen deficient systemprovides a very unique opportunity for the study at the interplay between structure and property.

A High-Resolution Detector Installed
on a Focusing Small-Angle Neutron
Scattering Spectrometer (SANS-U)
Shibayama GroupThe small-angle neutron scattering (SANS) spectrometer SANS-U, owned by ISSP, is installed on the C1-2 cold
neutron beamline of the research reactor (JRR-3) at the Japan
Atomic Energy Agency (JAEA), Tokai, Japan. Recently,
SANS-U was upgraded from a pinhole SANS (PSANS)
spectrometer to a focusing SANS (FSANS) spectrometer by
installation of a stack of 55 MgF2 lenses and a high-resolution position-sensitive detector (HR-PSD)[1]. Through thisupgrade, the accessible low Q-limit (Qmin) was expanded
to the order of 10-4 Å-1, where Q is the magnitude of thescattering vector, defined by Q = (4π/λ) sinθ (where λ and2θ are the wavelength and the scattering angle, respectively).
Observation of a scattering profile in this Q-range by meansof an FSANS requires a longer measurement time longer
than that of conventional PSANS. Consequently, measurement time for FSANS experiments usually has a higher
proportion of total user machine time. Therefore, it is desirable to improve the experimental efficiency of FSANS
measurements. In case of cold neutrons, ZnS/6LiF scintillation detectors are known for lower detection efficiency
compared with the conventional 3He detectors. Therefore, toimprove the HR-PSD, we attempted to increase the detection
efficiency of the ZnS/6LiF scintillator by maintaining a highspatial resolution and a low background.
In order to increase the performance of a ZnS/6LiF
scintillator for high-resolution detection of cold neutrons, we
determined optimum thickness of the ZnS/6LiF scintillator.
We also examined the chrematistics of the HR-PSD with the
optimized scintillator, and performed FSANS measurements
in order to compare the performances with a commercial
scintillator. Figure 1 shows the HR-PSD installed inside
the flight-tube of the SANS-U spectrometer. Note that the
HR-PSD consists of a cross-wired position-sensitive photomultiplier tube (PSPMT) combined with a ZnS/6LiF scintillator. According to the specifications of the PSPMT, the sizeof the effective area of the PMT and its spatial resolution areabout ø100 mm and 0.45 mm, respectively. The HR-PSD
packed in an Al vessel was mounted on an X-Z movablebench in front of the main 3He-PSD. Figure 2(a) shows thetotal count of neutrons depending on scintillator thickness.
By increasing the thickness from 0.180 to 0.433 mm, thetotal count increased remarkably from 1.23 × 105 to 3.18 ×

Reference[1] Y. Zhang and Y. Ueda, Inorganic Chemistry 52, 5206 (2013).
Authors
Y. Zhang and Y. Ueda

Fig. 1. Photograph of the high-resolution position sensitive detector(HR-PSD) in the flight tube of the SANS-U spectrometer. (1) The
position of the fixed beam-stopper (Cd; ø4 mm). The details of the
HR-PSD are described in another recent publication. [1]ISSP Activity Report 201221

Glass Transition of HydrogenAtoms in Palladium Lattice
Yamamuro Group

Fig. 2. Scintillator thickness dependences of (a) total count, and (b)peak position on a pulse-height spectrum for the ZnS/6LiF scintillator
developed by Katagiri et al. [2]105. In contrast, the total count increased slightly from 3.18
× 105 to 3.46 × 105 when the scintillator thickness increased
from 0.433 to 0.640 mm. Figure 2(b) shows the peak positionof the pulse height spectra for varying scintillator thicknesses The peak position for a commercial scintillator was
estimated to be 25.54 ch. A low peak position generally
leads to a decrease in counting stability because of difficultyin electrical discrimination, whereas higher values of peak
positions are suitable for count stability. Hence, a trade-off
exists between the total count and peak position. On the basisof the results of the total count and peak position for varying
scintillator thickness, we determined optimum thickness. The
requirements for the HR-PSD were as follows: (i) high detection efficiency and (ii) peak position approximately equal tothat of the commercial scintillator. Accordingly, the optimum
scintillator thickness was determined to be 0.433 mm. The
beam intensities obtained using the optimum ZnS/ 6LiF
scintillator were 1.39 times higher than those obtained using
the commercial scintillator, which is consistent with theresults of pulsed height measurements for comparison.
In conclusion, the total count of direct focused beam
intensity was 1.39 times that of the commercial scintillator
while maintaining both Q-resolution and the backgroundcount at the same level. This optimization resulted in asignificant improvement in the experimental efficiency of the
FSANS experiments.[3]Palladium hydride (PdHx) is the most popular metal
hydride which has been investigated by many physicists andchemists. It has been remarked also from industrial pointsof view, e.g., hydrogen storage, filters, sensors, catalysts,
etc. Figure 1 shows the adsorption isotherm of the Pd
and hydrogen gas system [1]. On adsorption, a hydrogenmolecule (H2) dissociates into two hydrogen atoms (2H).
It is known that the α phase appears in a lower concentration (x) region while the β phase in a higher x region. In theintermediate region (dome-like area of Fig. 1), the α and βphases coexist and pressure becomes constant according
to the Gibbs phase rule. Above the critical point (2.0 MPa,
259ºC), one cannot distinguish the α and β phases. Bothα and β phases have an fcc structure. Most of the H atoms
are located at the octahedral sites in the β phase, while thepositions of the H atoms are not known in the α phase. The
volume of the β phase is 11% larger than that of the α phase.
There are still many unsolved interesting problems in PdHx,
e.g., superconductivity at a higher x region, a surface ferromagnetic phenomenon, etc. The present work is associatedwith a mysterious phenomenon called “50 K anomaly”. We
have measured the heat capacity of the β phase with various
x using an adiabatic calorimeter which was modified for insitu introduction of hydrogen gas into the sample cell.
Figure 2 shows the heat capacities of PdHx (x = 0.638,
0.725, 0.782, 0.829). For all of the samples, a heat capacity
anomaly appeared around 50 K as expected from theprevious work [2, 3]. We have fitted the data at temperatures
lower than the anomaly to the function,
Cp = C(Debye) + C(Einstein) + γT,		
(1)where the first and second terms correspond to the acoustic
and optical vibrations, respectively and the third term
represents the electronic heat capacity. It was revealed that
C(Einstein) does not contribute in this temperature range
since the mass of an H atom is much smaller than that of a
Pd atom. The coefficient γ was determined not by the fitting
but by the interpolation for the previous heat capacity data
at very low temperatures [4]. The fitting was satisfactory for
all samples as shown in Fig. 2. The Debye temperature θD
determined by the fitting is 246 K, being mostly independent from x in the β phase. This value is smaller than thatof pure Pd (θD = 276 K), meaning that the Pd lattice isReferences[1] H. Iwase, H. Endo, M. Katagiri, and M. Shibayama, M. J. Appl.
Cryst. 44, 558 (2011).
[2] M. Katagiri, K. Sakasai, M. Matsubayashi, T. Nakamura, Y. Kondo,
Y. Chujo, H. Nanto, and T. Kojima, Nucl. Instrum. Methods A 529, 274(2004).
[3] H. Iwase, M. Katagiri, and M. Shibayama, M. J. Appl. Cryst. 45,507 (2012).
Authors
H. Iwase, M. Katagiria, and M. ShibayamaaJapan Atomic Energy Agency

Fig. 1. Adsorption isotherms of Pd-H system and schematic structure of
the α and β phases of PdHx.

22

ISSP Activity Report 2012

Spin Nematic Interaction in Square-Lattice
Antiferromagnet Ba2CoGe2O7
Masuda Group

Fig. 2. Heat capacities of PdHx (x = 0.638, 0.725, 0.782, 0.829). The
arrows represent the glass transition temperatures Tgs whose x dependence is shown in the inset. The curves in the Cp and Tg figures represent the results of the fittings to Eqs. (1) and (2), respectively. See text
for the details.

softened by accommodating H atoms. In the previous studies[2, 3], the 50 K anomaly was treated as a Cp peak. From theprecise analysis, however, it was found that this is a step-likeanomaly. We also found that an exothermic, followed byendothermic, phenomenon appeared around the anomaly.
Taking its temperature dependence and annealing effectinto consideration, we conclude that the 50 K anomaly of
PdHx is not a phase transition but a glass transition that is afreezing phenomenon of the H atoms positionally disorderedamong the octahedral sites. This conclusion is supported by
the previous NMR [5], mechanical [6], thermal relaxation[7] studies which show that the relaxation time of the jump
motion of the H atoms reaches 1000 s (the time-scale of theglass transition) around 50 K.
Figure 2 demonstrates that the glass transition temperature Tg strongly depends on x. By assuming that the jumprate of the H atoms is proportional to the number of vacantsites and the Arrhenius relation is valid in this region, we
derived the following equation,
Tg = ΔE/[ln(1 - x) + A].			(2)where ΔE is the activation energy and A is a constant. The x
dependence of Tg is reproduced well as shown the inset of
Fig. 2.
We are now planning to measure the heat capacity of the
PdDx sample with expectation of isotope effects on the 50
K anomaly. It is possible to observe an ordering transitionof the D atoms since the previous neutron diffraction works
using PdDx samples suggest some sort of ordering of the Datoms below 50 K.
References[1] F. D. Manchester, Phase Diagrams of Binary Hydrogen Alloys,
p.158 (2000).
[2] D. M. Nace and G. J. Aston, J. Am. Chem. Soc. 79, 3627 (1957).
[3] H. Araki, M. Nakamura, S. Harada, T. Obata, N. Mikhin,
V. Syvokon, and M. Kubota, J. Low Temp. Phys. 134, 1145 (2004).
[4] C. A. Mackliet and A. I. Schindler, Phys. Rev. 146, 463 (1966).
[5] D. A. Cornell and E. F. W. Seymour, J. Less-Common Met. 39, 43(1975).
[6] J. K. Jacobs, C. R. Brown, V. S. Pavlov, and F. D. Manchester,J. Phys. F: Metal Phys. 6, 2219 (1976).
[7] J. K. Jacobs and F. D. Manchester, J. Phys. F: Metal Phys. 7, 23(1977).
Authors
H. Akiba, M. Kofu, H. Kobayashia, H. Kitagawaa, and O. YamamuroaKyoto University

The interaction between magnetic moments has been wellknown even before the establishment of quantum dynamics
and the pioneering research on various types of the magnetic
correlations by P. Curie is the basis of modern magnetism.
Recently the correlation of the higher order of the spin
operator has attracted theoretical interest in terms of hidden
order in spin disordered state [1] but the direct experimental
probe to identify the correlation is absent. Meanwhile inmultiferroic compound that exhibits spontaneous order bothin magnetism and dielectricity, the electric polarization isexpressed by second order tenors of the spin operators [2],and the spin nematic operator comes to visible. In this fiscal
year we demonstrate the existence of the spin nematic interaction in an easy-plane type antiferromagnet Ba2CoGe2O7[3, 4] by exploring the magnetic anisotropy and spin
dynamics. Combination of neutron scattering and magnetization measurements reveals that the dominant origin of theobserved in-plane anisotropy is the ferro-type interactionof spin nematic operator instead of conventional single-ion
anisotropy. The structure of the spontaneous polarization[10] is consistent with the ferro-type order of the nematic
operators. The introduction of the spin nematic interaction isuseful to understand the physics of spin and electric dipole inmultiferroic compounds.
The crystal structure of Ba2CoGe2O7 is schematized inFig. 1a. The compound exhibits antiferromagnetic transition
at TN=6.7 K and a staggered antiferromagnetic structure inthe (001) plane was identified [3]. Below TN, a ferroelectric
polarization is simultaneously induced [4]. Inelastic neutron
scattering spectrum and magnetization measurements areshown in Figs. 1c and d, respectively. In the former clear
anisotropy gap of about 0.12 meV is observed at the antiferromagnetic zone center Q = (100). In the derivative ofmagnetization curve, a peak due to spin flop is observed at

Fig. 1. a, Crystal structure of Ba2CoGe2O7. b, Structures of spin
dipoles, spin nematic operator OXY , and electric polarizations in
Ba2CoGe2O7. Red arrows are spin dipoles and open circles with crosses
and small filled circles indicate the directions of electric polarization calculated by using the relation between spin nematic operator
and electric polarization. Two-tone clovers are nematic operators. c,
Inelastic neutron scattering spectrum. d, Bulk magnetization M and thederivative by field dM/dH in field along [110], [010], and [001] at T =1.8 K.

ISSP Activity Report 201223

the field H ~ 0.2 T in H // [110], the spin flop field increases
in H // [100], and no spin flop is observed in H // [001]. The
results mean that the magnetic easy axis is along the [110]direction. Meanwhile, the point symmetry of CoO4 tetrahedron, D2d, does not allow the magnetic anisotropy along〈110〉 as far as single ion anisotropy and two-spin exchange
anisotropy are considered. Thus the anisotropy is ascribed tothe interaction of higher order of spin operator. Symmetry
consideration leads to the relation between the electric
polarization and the spin nematic operator, PX = −KabOYZ,
PY = −KabOZX, and PZ = −KcOXY, , where X, Y, and Z are
the local coordinates on CoO4 tetrahedron as shown in Fig.
1a. Among these OYZ and OZX are irrelevant to the anisotropy since the Z component of spin dipole is zero in thespin structure [3]. Hence we consider the nematic Hamiltonian Hp = -JpKc2 Σ OXY(i)OXY(j). Calculation of the classicali, jenergy including antiferromagnetic spin interaction andferro-type nematic interaction between OXY operators leads
the ground state to the staggered spin structure along 〈110〉direction. The ferro-type nematic correlation depicted in Fig.
1b is consistent with the ferroelectric polarization along Z
direction previously reported [4]. Both neutron spectrum andbulk magnetization are quantitatively explained by extended
spin-wave calculation based on Hamiltonian including theferro-type nematic interaction.

Fig. 1. Magnetic field dependence of the temperature of Gd3Ga5O12
measured in pulsed magnetic fields. Open circles represent the reported
results derived from the analyses of the magnetization curve measured
in the quasi-adiabatic condition [2]. The inset shows a schematic illustration of the film thermometer grown on the sample.

References[1] A. F. Andreev and I. A. Grishchuk, Sov. Phys. JETP 60, 267 (2984).
[2] H. Katsura, N. Nagaosa, and A.V. Balatsky, Phys. Rev. Lett. 95,
057205 (2005).
[3] A. Zheludev et al., B. Phys. Rev. B 68, 024428 (2003).
[4] H. Murakawa et al., Y. Phys. Rev. Lett. 105, 137202 (2010).
Authors
M. Soda, T. Masuda, M. Matsumoto a, M. Mansson b, S. OhiraKawamurac, and K. Nakajimaca
The Shizuoka UniversitybTokyo Paul Sherrer Institutec
J-PARC---International MegaGauss Science Laboratory------

Determination of Entropies by
Measurements of Magneto-Caloric
Effects in Pulsed Magnetic Fields
Tokunaga and Katsumoto Groups
Existence of highly degenerated ground states, e.g. infrustrated magnets, results in the emergence of various
non-trivial physical phenomena. Such degeneracy involves
significant residual entropy at low temperatures, whereas its
direct determination is not easily achieved. Our measurement
system of the magneto-caloric effects (MCEs) in pulsed highmagnetic fields provides unique opportunity to study theresidual entropies. Fast field-sweep rates in the pulsed fields
enable us to realize effectively adiabatic conditions in themagnetization processes, and hence, accurate evaluation of
the entropies in wide range of magnetic fields up to 55 T.
With using our system, we measured the MCEs in
Gd3Ga5O12 (GGG) [1], which does not show long-rangeorder of Gd moments down to 25 mK owing to geometricalspin frustration. Through the measurements of magnetoresistance in calibrated resistive film thermometers grown on
top of the sample surfaces, we successfully monitored theinstantaneous change in the sample temperature in durationof the pulsed fields (~ 36 ms). The solid lines in Fig. 1 show
the field dependence of the temperature of GGG. The revers-

24

ISSP Activity Report 2012

Fig. 2. Temperature dependence of the entropy of Gd3Ga5O12 at several
magnetic fields. The open circles were determined by the horizontal
shift of the standard S-T curve at 10 T by the amount of ∆Tad in themeasurements of the MCEs. The solid lines were evaluated by numerical integration of the heat capacity data at various fields. The dashedlines are calculated S-T curves based on a simple crystal field model [3].

ible profiles indicate that the heat exchange to the thermalbath and the delay in the response of the thermometer are
negligibly small. In addition, the present results show reasonable agreement with the preceding results [2] (open circles)
indicating the quantitative validity of the present system.
From these data, we can evaluate the entropy (S) as afunction of temperature (T) for various fields. First, we
determined the standard S-T curve by integrating the data of
specific heat (C) at 10 T, where the residual entropy seems
to be negligible at the lowest temperature for the specificheat measurement (2 K). Then the S-T curves at different
fields (open circles) were determined by horizontal shift by∆Tad determined by measurements of MCEs as shown by
the arrows in Figs. 1 and 2. The solid lines in Fig. 2 are the
S-T curves evaluated by numerical integration of the specificheat data, in which the amounts of the residual entropies,
i.e. the vertical offsets, were determined so as to match with
the MCE results. The result reveals the failure of the simple
estimation of the entropy by a simple crystal field model(dashed lines), while this discrepancy cannot be resolved by
the C-T curves in this temperature range.
References[1] T. Kihara et al, submitted to Rev. Sci. Instrum.
[2] R. Z. Levitin et al, J. Magn. Magn. Mater. 170, 223 (1997).
[3] W. Dai, E. Gmelin, and R. Kremer, J. Phys. D: Appl. Phys. 21, 628(1988).

Authors
T. Kihara, Y. Kohama, Y. Hashimoto, S. Katsumoto, and M. Tokunaga

Exotic spin states in SrCu2(BO3)2
at Megagauss Magnetic Fields
Y. Matsuda and Takeyama Groups
Quantum spin frustration induces interesting magnetic
states in matters. A orthogonal dimer spin system
SrCu2(BO3)2 exhibits fascinating phenomena due to thefrustration [1]. The crystal lattice is topologically equivalent
to the Shastry-Sutherland (SS) lattice. The nearest neighbor(NN) S=1/2 spins of Cu ions are antiferromagneticallycoupled and form the singlet dimer through the exchangeinteraction J. Since the inter dimer exchange interaction J’
between the next nearest neighbor (NNN) Cu ions is antiferromagnetic as well, the orthogonal configuration makes thequantum frustration. The multiple magnetization plateauxfound in high magnetic fields have attracted significant attention as the exotic phenomena. [1, 2] The distinct 1/8, 1/4, and1/3 plateaux were observed in the magnetization process andthe existence of the long predicted 1/2 plateau was reportedby the magnetostriction measurement [3]. However, thewhole 1/2 plateau phase was not unveiled yet because of thetechnical upper limit of the magnetic field 100 T. Moreover,high-field spin states in the SS lattice are theoreticallysuggested to exhibit the exotic states such as the supersolidstate between the 1/3 and 1/2 plateaux and that above the 1/2
plateau [4]. The quantum spin state when the density of thetriplet state becomes high in the SS lattice has never been
uncovered yet.
In the present work, we have investigated the spin statesof SrCu2(BO3)2 by the magnetization measurement up to 109
T using the single-turn coil method. The distinct 1/2 magnetization plateau phase has been observed in the field range
from 84 to 108 T. A sharp magnetization increase at the endof the 1/2 plateau suggests the possible phase transition to
the supersolid phase.
Figure 1 shows the magnetization (M) and the magnetic
field derivative of the magnetization (dM/dH) as a functionof magnetic field. Distinct peak structures are observed in thedM/dH curve, indicating the stepwise increase in the magne-

Fig. 1. A magnetization curve at 2.1 K up to 109 T. Applied field isparallel to the c-axis of the crystal. The magnetic field derivative of themagnetization (dM/dH) curve is also shown as a function of magnetic
field. The dotted curve is the magnetization curve reported previously.
(Ref.[2])tization at critical magnetic fields (Hcn, n=1~6). By comparison with the magnetization curve in the previous report [2],
Hc1~ Hc3 correspond to the boundaries of 1/8, 1/4 and 1/3
plateaux phase. The broad double-peak structure comprisedof Hc4 and Hc5 may suggest that there is an exotic phasebetween the 1/3 and 1/2 plateau phase. Hc5 and Hc6 clarify
the whole region of 1/2 plateau. The finite slope observed at
the 1/2 plateau phase can be caused by the thermal excitation. The exotic spin states in the SS lattice will be clarified
with a help of detailed theoretical calculations. Such collaboration work is now in progress.
References[1] H. Kageyama, K. Yoshimura, R. Stern, N. Mushnikov,K. Onizuka,
M. Kato, K. Kosuge, C. Slichter, T. Goto, and Y. Ueda, Phys. Rev. Lett.
82, 3168 (1999).
[2] K. Onizuka, H. Kageyama, Y. Narumi, K. Kindo, Y. Ueda, and
T. Goto, J. Phys. Soc. Jpn. 69, 1016 (2000).
[3] M. Jaime, R. Daou, S. A. Crooker, F. Weickert, A. Uchida, A. E.
Feiguine, C. D. Batista, H. A.Dabkowska, and B. D. Gaulin, PNAS
109, 12404 (2012).
[ 4 ] J . L o u , T. S u z u k i , K . H a r a d a , a n d N . K awa s h i m a ,arXiv:1212.1999v1 (2012).
Authors
Y. H. Matsuda, N. Abe, S. Takeyama, and H. KageyamaaaKyoto University---Laser and Synchrotron Research Center/
Synchrotron Radiation Laboratory-----------Terahertz Time Domain Observation of
Rotational Type Spin Reorientation Transition
Suemoto Group
Ultrafast coherent excitation of spins is one of thepromising technologies for developments in spintronics andinformation processing. Such ultrafast control of the spin
systems are often studied with pump and probe measurement using femtosecond visible laser [1]. Because thesemethods use indirect excitations of the spins that occur as aresult of dielectric interaction with optical pulses, quite large
amount of optical energy, typically 10 microjoule per pulse
is required for pumping the spins. For this reason, unwanted
electronic excitation and heating occurs. Instead, by using
the terahertz pulses, spin precession motion can be excited
directly through magnetic interaction between the terahertz
magnetic component and the spin system [2, 3]. As describedin Fig. 1, magnetic field component of the THz pulse instantaneously tilts the spins from their equilibrium orientation,

Fig. 1. Illustration of ultrafast spin precession excitation with themagnetic field component of THz pulse parallel to the a-axis for (a)high temperature phase of ErFeO3, and (b) low temperature phase. In
the high temperature phase, elliptically polarized emission from F mode
resonance is observed. On the other hand, linearly polarized AF modeemission is observed in the low temperature phase. For the ease to see,the precessions of the individual Fe3+ spins 1 and 2 (red arrows) areomitted from the figures.

ISSP Activity Report 201225

causing the spins to precess around the effective magnetic
field. Such motion of spins emits radiation which can beobserved as free induction decay signal. With this technique,spin precession can be excited and observed simultaneouslywith a femtojoule terahertz pulse, which enables us to ignore
the heating effect. In addition, owing to the low photon
energy of the terahertz pulse, unwanted electronic excitation
can be avoided.
Weak ferromagnet ErFeO3, which belongs to the rareearth orthoferrites known to have two magnetic resonancemodes (Ferromagnetic mode and Antiferromagnetic mode)in sub-THz region [3], shows temperature induced spin reorientation transition. In this phase transition, the easy axis of
the Fe3+ spins show 90 degree rotation. In the temperature
range higher than 96 K (high temperature phase), the Fe3+
spins align antiferromagnetically toward the a-axis with ac-axis parallel macroscopic magnetization resulting fromthe canting of the spins (Fig. 1 (a)). At 87 K or lower (lowtemperature phase), the easy axis of the Fe3+ spins and themagnetization become parallel to the c-axis and a-axis,
respectively (Fig. 1(b)).
Here, by focusing on the two magnetic resonance modes,
we devised methods to observe the spin reorientation throughTHz time domain spectroscopy (TDS) and demonstrated thismethod with ErFeO3 [4]. The measurement was performed
with a sintered pellet sample and a single crystal with a (001)surface. The temperature dependence of the two resonant
frequencies is shown in Fig. 2(a). It shows that the F mode
frequency drops significantly around the reorientation
temperature. The spectra of radiation emitted from the spin
precession excited with THz magnetic field parallel to a-axis
shows that the frequency of the emission changes significantly between high temperature phase and low temperaturephase (Fig. 2(b)). Comparing this with Fig. 2(a), it can beseen that the resonant frequency equals to F mode frequency
for 250 K and AF mode for 70 K. Such switching of theexcited mode can be explained by rotation of the easy axis
due to the spin reorientation (Figs. 1(a) and (b)) and therefore, we have shown that spin reorientation can be detected
through THz TDS measurement. To the best of our knowledge, this is the first observation of such phase transitions
with THz time domain measurement. When observing thisbehavior in the temporal waveforms, half-cycle of the precession is sufficient for distinguishing F and AF modes. Thus,by focusing on the existence of the AF mode, the phase of
the spin configuration can be determined with a resolutionof 0.67 ps. Therefore, this method offers ability to detectspin reorientation with picosecond time resolution and it

Fig. 2. (a) Temperature dependence of F and AF mode resonant
frequencies in ErFeO3. Circle markers show frequencies obtained withthe sintered pellet, and triangle markers show frequencies in a single
crystal sample with (001) surface. Two vertical lines indicate higher andlower transition temperatures at 96 K and 87 K. (b) Intensity spectra ofoscillatory components obtained with HTHz || a-axis THz pulse excitation.

26

ISSP Activity Report 2012is expected to open the doorway for studying dynamics ofultrafast spin reorientation.
References[1] A. Kirilyuk, A. V. Kimel, and T. Rasing, Rev. Mod. Phys. 82, 2731
(2010).
[2] M. Nakajima, A. Namai, S. Ohkoshi, and T. Suemoto, Opt. Exp. 18,
18260 (2010).
[3] K. Yamaguchi, M. Nakajima, and T. Suemoto, Phys. Rev. Lett. 105,
237201 (2010).
[4] K. Yamaguchi, T. Kurihara, Y. Minami, M. Nakajima, and T.
Suemoto, Phys. Rev. Lett. 110, 137204 (2013).
Authors
K. Yamaguchi, T. Kurihara, Y. Minami, M. Nakajima, and T. SuemotoFirefly Bioluminescence Affectedby Temperatures and Metal Ions
Akiyama Group
Firefly bioluminescence has attracted great interest
among various research fields. The mechanisms of very highquantum yield and condition-sensitive color change of thebioluminescence are long standing issues of basic biochemistry and biophysics, and applications of the bioluminescencesuch as food hygiene inspection, DNA sequencing, bioimaging, cancer diagnosis, and immunoassay, are under intensive developments and some of them are commercially available. Quantitative study of the bioluminescence is crucially
important for both basic research and application, but still
very rare [1, 2].

Fig. 1. Picture of temperature-sensitive color change of bioluminescence of North-American Firefly (Photinus pyralis) at pH 6.8 in
home-made acrylate tube cell placed on an aluminum sheet.

Fig. 2.Time-integrated total photon flux spectra of bioluminescenceof North-American Firefly with various zinc-ion densities. Black line
shows data with magnesium ion, whose density did not changed thespectra significantly, as a reference.

We measured total-photon flux of firefly bioluminescencein various reaction conditions such as temperature, pH, andbivalent metal density quantitatively. All quantitative spectra
were very well reproduced by three Gaussian components,
which peaked at 1.9 (red), 2.0 (orange), and 2.2 (green) eV.
The positions and widths of the components were insensitive to reaction conditions. Firefly bioluminescence changed
its color from yellow-green to yellow, then to orange
with increasing temperature as shown in Fig. 1. Quantitative analysis revealed that the color change solely owing
to decrease of intensity of the green Gaussian component
with increasing temperature. Very similar color change wasobserved with increasing bivalent metal ion density as shownin Fig. 2. The observed similarity of color change is usefulfor detailed basic study such as comparisons with quantumchemistry calculations and the robustness of the luminescence below 2.0 eV can be advantageous as a standard yieldfor future applications of quantitative measurement of bioluminescence.
References[1] Y. Ando et al., Nature Photonics. 2, 44 (2008).
[2] Y. Wang et al., Photochemistry and Photobiology 87, 846 (2011).
Authors
T. Mochizuki, Y. Wanga, M. Hiyama, H. Akiyama, H. Kubota b,
K. Terakadoc, T. NakatsucaChinese Academy of Science, Chinab
ATTO Corporationc
Kyoto University

Direct Short-Pulse Generation from
Gain-Switched Semiconductor Lasers
Akiyama GroupThe compact, inexpensive, and easy-to-operate
gain-switched semiconductor lasers have wide potential applications as pulse light sources in industries andmedical treatments [1]. However, it was very difficult toobtain short pulses with duration shorter than 10 ps throughgain-switching technique. We investigated gain-switching
dynamics in various semiconductor lasers [2 - 4], andsuccessfully achieved Fourier-transform limited picosecond
optical pulses via spectral filtering technique fromgain-switched semiconductor lasers [5, 6].
Excitation-power-dependent lasing spectra from again-switched distributed feedback (DFB) laser diode(LD) driven by pulsed current injection with duration ofnanosecond are shown in Fig. 1(a). The spectral broadening
as well as the down chirping (shown as the dashed line in
Fig. 1(a)) on short wavelength side are typical phenomenareflecting the large variation of carrier density during
pulse generation by gain switching [6], which in turn is
an important reason that results in the broadening of thegain-switched output pulses. By utilizing spectral filtering
technique to extract the transient short wavelength components (Fig. 1(b)) in the lasing spectra, we have successfully
generated Fourier-transform limited 4.7-ps short pulses (Fig.
1(c)) from a gain-switched DFB-LD. The present techniqueprovides a simple and practical method for short pulse
generation and brings new insights for ultrafast nonlinear
dynamics producing picosecond optical pulses by gain
switching.

Fig. 1. (a) Lasing spectra of a single-mode DFB-LD at room temperature with various current densities, showing the significant spectral
broadening towards short wavelength side with increasing current
density. Dashed line shows the down chirp during gain switching of
the DFB-LD with the highest excitation density. (b) Spectrum of theshort wavelength component after spectral filtering of the one with thehighest excitation in (a). The FWHM of the peak is measured to be
0.56 nm. (c) The autocorrelation trace of the spectrally filtered shortwavelength component. Fitting result shows that the pulse has a sech2
shape with a pulse width of 4.7 ps. The time-bandwidth product (0.33)
of the obtained short pulse demonstrates that the obtained short pulses
at short-wavelength side are Fourier-transform-limited pulses.
References[1] H. Yokoyama, et al., Opt. Express 14, 3467 (2006).
[2] S. Q. Chen, et al., Jpn. J. Appl. Phys. 51, 098001 (2012).
[3] S. Q. Chen, et al., Appl. Phys. Lett. 101, 191108 (2012).
[4] S. Q. Chen, et al., Opt. Express 21, 7570 (2013).
[5] S. Q. Chen, et al., Opt. Express 20, 24843 (2012).
[6] S. Q. Chen, et al., Opt. Express 21, 10597 (2013).
Authors
S. Q. Chen, M. Yoshita, T. Ito, T. Mochizuki, C. Kim, H. Akiyama,
A. Satoa, and H, Yokoyamaaa
Tohoku University

ISSP Activity Report 201227

Highlights of Joint Research
Supercomputer Center
The Supercomputer Center (SCC) is a part of theMaterials Design and Characterization Laboratory (MDCL)of ISSP. Its mission is to serve the whole community ofcomputational condensed-matter physics of Japan providing
it with high performance computing environment. In particular, the SCC selectively promotes and supports large-scalecomputations. For this purpose, the SCC invites proposals forsupercomputer-aided research projects and hosts the Steering
Committee, as mentioned below, that evaluates the proposals.
The ISSP supercomputer system consists of two subsystems: System 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 in total 200 TFlops.
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. In CMSI, a number of major
Japanese research institutes in various branches of materials
science are involved. The SCC supports the activities of
CMSI as its major mission.
System C - FUJITSU PRIMEHPC FX10 has just been
installed in April, 2013. It is highly compatible with K
computer, the largest supercomputer in Japan. System C
consists of 384 nodes, and each node has 1 SPARC64TM
IXfx CPU (16 cores) and 32 GB of memory. The total
system achieves 90.8 TFlops theoretical peak performance.
Class Max/Min

Application

PointsNumberof
Projects

Total Points
AppliedApproved

System A

System B

System A

System B

A<100

any time

3

10

290

10

290

B

<2k

twice a year

49

14.5k

40.8k

14.1k

29.5k

C

<20k

twice a year

121

448.8k

919.4k422.3k

406.5kD<20k

any time

11

0

94.0k

0

53.0k

E

<30k

twice a year

21-597.0k

-286.0kS>10k

twice a year

0

0

0

0

0

-

-

-

151.6k205

463.3k

1,651.5k

436.4k

926.9k

CMSI
Total

Table 1. Research projects approved in 2012
The maximum points allotted to the project of each class are the sumof the points for the two systems; Computation for 1 CPU • hour corresponds to 0.6 and 0.02 points for System-A and System-B, respectively.

28

ISSP Activity Report 2012

All staff members of universities or public research institutes in Japan are invited to propose research projects (called
User Program). The proposals are evaluated by the Steering
Committee of SCC. Pre-reviewing is done by the Supercomputer Project Advisory Committee. In school year 2012
totally 205 projects were approved. The total points appliedand approved are listed on Table 1 below.
The research projects are roughly classified into thefollowing three (the number of projects approved):
First-Principles Calculation of Materials Properties (94)
Strongly Correlated Quantum Systems (53)
Cooperative Phenomena in Complex, Macroscopic Systems (58)Projects in all three categories involve both methodology of computation and its applications. The results of the
projects are reported in 'Activity Report 2012' 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 2012, the following three invited papers areincluded:"First-Principles X-ray Photoelectron Spectroscopy
Calculation on Defects in Semiconductors",
Jun TAMAUCHI, Yoshihide YOSHIMOTO, and Yuji SUWA
"Topological Hall Effect in Spatially Inhomogeneous
Systems",
Masafumi UDAGAWA"Huge-Scale Molecular Study of Multi-Bubble Nuclei",
Hiroshi WATANABE and Nobuyasu ITO

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 with 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

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.

(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, HRC, and a high resolution powder diffractometer are utilized for a conventional
solid state physics and a variety of research fields on
hard-condensed matter, while in the field of soft-condensed
matter science, researches are mostly carried out by using thesmall angle neutron scattering (SANS-U) and/or neutron spinecho (iNSE) instruments. The upgraded time-of-flight (TOF)
inelastic scattering spectrometer, AGNES, is also 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 2013, JRR-3 has not restarted yet. General
User Program of 2012 was cancelled and that of 2013 hasbeen suspended so far. In order to compensate the loss of
the activity of NSL, a number of proposals accepted in 2011

Fig. 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 celebrates the completion of the project in
October 2010.)

and 2012 were transferred to overseas thanks to kind offerfrom the major facilities, namely, ORNL, ILL, ANSTO, and
HANARO.
Research topics in FY2012 cover Hydrogen release fromLi 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), Structural analysis ofhigh performance ion-gel comprising tetra-PEG networks(SANS-U), Neutron scattering studies of Ti-Cr-V bcc alloy
with the residual hydrogen and deuterium (AGNES). In
addition, there are a variety of activities on fundamental
physics, neutron beam optics, developments of neutron
scattering techniques.
The NSL also operates the U.S.-Japan Cooperative
Program on neutron scattering, providing further research
opportunities for 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 FY2011 is given in NSL-ISSP Activity Report vol. 18(2011), which can be downloaded from the following URL,
http://quasi.issp.u-tokyo.ac.jp/actrep/actrep-18-2011/index-rep_vol18.html
The list of publication is also given at,(http://quasi.issp.u-tokyo.ac.jp/actrep/actrep-18-2011/index-pub_vol18.html).

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) in a non-destructive
manner, and from 100 up to 730 T (the world strongest as an
in-door record) by destructive methods.
They are open to scientists both from Japan and fromoverseas, especially from Asian countries, and many fruitfulresults are expected to come out not only from collaborative research but also from our in-house activities. One ofFig. 1. Signboard at the entrance of the IMGSL.

ISSP Activity Report 201229

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

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

our ultimate goals is to provide the scientific users as our
joint research with magnets capable of a 100 T, milli-second
pulses in a non-destructive mode, and to offer versatile
precision physical measurements. The available measuring
techniques now include magneto-optical measurements,
cyclotron resonance, spin resonance, magnetization andtransport measurements.
Our interests cover quantum phase transitions (QPT)
induced by high magnetic fields. Field-induced QPT has
been explored in various materials such as quantum spin
systems, strongly correlated electron systems and othermagnetic materials. Non-destructive strong pulse magnets
are expected to provide us with reliable and precise solidstate physics measurements. The number of collaborative
groups for the research is over 50 in the year of 2012.
A 210 MJ flywheel generator (Fig.2) which is the world's
largest DC power supply has been installed in the newly built

Fig. 3. (Build. C) The building for the electro-magnetic flux
compression, generating over 700 T. 1000 T project started since2010, and finally condenser banks of 9 MJ (5 MJ + 2 MJ +2 MJ) as amain system with the 2 MJ sub bank system for the seed field will be
installed, and will be completed in the year of 2013.

30

ISSP Activity Report 2012

DC flywheel generator station at our institute. The generator,
once used for Toroidal magnet coil in JFT-2M (JAERI
Fusion Torus-2M) Tokamak nuclear fusion testing device,
is now renewed as a power supply for the pulse magnets.
The construction of the magnet service station has also beenaccomplished. The magnet technologies are intensively
devoted to the quasi-steady long pulse magnet (of order of
1-10 sec) energized by the giant DC power supply, and also
used for the outer-magnet coil to realize a 100 T nondestructive magnet.
Developments of our destructive magnets are currently
in progress. The ultra-high magnetic fields are obtained in a
microsecond time scale. The electromagnetic flux compression (EMFC) system is equipped with a 5 MJ condenserbank and its seed coils with a 1.5 MJ condenser bank. The
protector chamber and iron block protectors were refined
against stronger explosion than before to be endurable
against explosion by a full injection of 5 MJ. By devisingcopper lined primary coil, we could improve energy
transfer efficiency from the primary coil to the liner kinetic
energy compressing the magnetic flux. The seed field coils
providing the initial magnetic flux are also newly designed
and the maximum magnetic field was increased from 3.2 T
to over 4.4 T at the position of the primary coil. These efforts
led us to obtain the maximum magnetic field of 730 T by a
4 MJ injection of the EMFC recognized as a renewal of theworld record as an indoor experiment. We have started a
new project of the EMFC aiming at achieving 1000 T and its
application to the materials science, financed by the ministryof education, culture, sports, science and technology in thefiscal year of 2010 and 2011 (Fig.3).
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 is ahorizontal type (H-type, Fig.4) and the other is a vertical type(V-type). 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, forvery-low temperature experiments, a combination of theV-type STC and a liquid helium bath cryostat is very useful;the precise magnetization measurements at 2.5 K can be
performed up to 120 T.

Building C
Room
101-113

Building C
Room
114-120

Building C
Room 121

Building K

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

40 ms
18 mm

70 T

40 ms
10 mm

Mid-Pulse Magnet Non-destructive

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

30 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
0.5 s
30 mm

Independent
Experiment in 5 site

Table 1. Available Pulse Magnets, Specifications

Center of Computational Materials Science
K-computer at Kobe won the title of the world's fastest
computer at TOP500 ranking announced at International
Supercomputing Conference (ISC) 11. Though it is in the 3rdplace in the list as of today, it is still providing the Japanesescientific community with an incomparable amount ofcomputational resources. With the advancement of hardware
and software technologies, large-scale numerical calculations have been making important contributions to materials
science and will have even greater impact on the field in
the near future. Center of Computational Materials Science(CCMS) was founded as a specialized research center for
promoting computer-aided materials science with massively
parallel computation using K-computer. This center alsofunctions as the headquarters of Computational Materials
Science Initiative (CMSI), which is an inter-institutionalorganization for computational science of a broad range of
disciplines, including molecular science, quantum chemistry,
biological materials, and solid state physics. ISSP madecontracts with 9 universities and 2 national institutes forsupporting the activities of CMSI in which nearly 100
research groups are involved. The main purpose of CMSI isto establish a new community of computational science inwhich researches from different backgrounds work together
on grand challenge problems, thereby developing computational infrastructures (new algorithms, coding styles,
standard software packages, etc) and inspire young scientists.

A branch office of CCMS was also established in the
RIKEN AICS building on the Port Island Kobe, where
K-computer is located, for supporting CMSI researchers
getting together at Kobe to fine-tune various applications
software for K-computer. It also helps developing bettercontact with staff members of RIKEN, the operating institute of K-computer. Another mission of the Kobe branch of
CCMS is exchanging ideas and techniques with researchers
from other fields of computer science. (There are 5 major

Fig. 1. K-Computer

ISSP Activity Report 201231

Synchrotron Radiation Laboratory

Fig. 2. Summer School in Zao

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 SY2012:• “K-Computer Users' Forum”(May 10/2012, Kobe)• “Joint-Meeting between Field 2 and 5”(May 30/2012 Kashiwa)• “Material Simulation in Petaflops Era (MASP) 2012”(June 25-July 13/2012, Kashiwa)• “Workshop: Programming Techniques for K-Computer”(July 17-19/2012, Kakegawa)• “Summer School: New Materials and New Quantum States”(Aug. 20/2012, Zao)
• “RSC-CMSI Joint Symposium: Multi-scale Structures
Research” (Sep. 15/2012, Hyogo)• “CMSI Symposium”(Dec. 03-05/2012, Okazaki)• “Interdisciplinary Workshop on Numerical Methods for
Many-Body Correlations” (Feb. 05-06/2013, Hongo)• “CMSI Kobe Hands-On: FMO Tutorial”(Feb. 07/2013, Kobe)• “Workshop on Synchrotron Radiation and Computational
Physics” (Feb. 14/2013, Hongo)• “Workshop: Programming Techniques for K-Computer”(Feb. 14-16/2013, Kanazawa)• “Symposium: Visualization of Materials Science”(Mar. 05/2013, Akihabara)• “CMSI Kobe Hands-On: ALPS Tutorial”(Mar. 06/2013, Kobe)• “CMSI Kobe Hands-On: xTAPP Tutorial”(April 23/2013, Kobe)

The Synchrotron Radiation Laboratory (SRL) was established in 1975 as a research division dedicated to solid statephysics using synchrotron radiation (SR). In 1989, SRL
started to hold the Tsukuba branch, a branch laboratory in
the Photon Factory (PF), High Energy Accelerator Research
Organization (KEK). SRL maintains a Revolver undulator,
two beamlines and three experimental stations; BL-18A for
angle-resolved photoemission spectroscopy with SCIENTA
electron analyzer, while undulator beamline BL-19A
and BL-19B, for spin- and angle-resolved photoelectron
spectroscopy (SARPES) and soft X-ray emission spectroscopy experiments, respectively. Recently, a high-yield spin
detector, using very low energy electron diffraction, wasdeveloped at BL-19A. SAPRES measurements have now
been performed with high-resolution and the experiments atthe beamline have become important for exciting topics ofsurface/solid state physics such as topological insulators andferromagnetic nanofilms.
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
essential role in constructing a new high brilliant soft X-ray
beamline, BL07LSU, in SPring-8. The light source is thepolarization-controlled 25-m long soft X-ray undulator.
The monochromator is equipped with varied-line-spacing
plain grating, which covers the photon energy range from
250 eV to 2 keV. At the end of the beamline, four experimental stations have been developed for frontier spectroscopy researches: the three-dimensional (3D) nano-ESCA
station, the soft X-ray emission spectroscopy (XES) station,
the time-resolved soft X-ray spectroscopy (TR-SX) station,and the free-port station for any experimental apparatus.

Fig. 1. 3D nano ESCA at SPring-8 BL07LSU

Fig. 2. XES station at SPring-8 BL07LSU

32

ISSP Activity Report 2012

Fig. 2. Image of laser activities in Building E

Fig. 3. TR-SX station at SPring-8 BL07LSU

The beamline construction was completed in 2009 and SRL
established the Harima branch laboratory in SPring-8. The
four end-stations have now been opened fully to outsideusers. In 2012, 110 researchers made their experiments
during the SPring-8 operation time of 4000 hours.
Members of SRL have devoted themselves in serving
users with technical supports and they have also carried out
their own research works on advanced solid state spectroscopy. At SPring-8 BL07LSU, for example, the staffs haveachieved the high performance at their stations: the 3D
nano-ESCA reaches the spatial resolution of 70 nm, the XES
station obtains spectra with energy resolving power E/∆E
larger than 10,000, and the TR-SX makes the laser –pump
and SR-probe method with the time-resolution of 50 ps
which corresponds to the SR pulse-width.

time-resolved, spin-resolved spectroscopy, diffraction, lightscattering, imaging, microscopy and fluorescence spectroscopy, by new coherent light sources based on laser andsynchrotron radiation technology over a wide spectrum range
from terahertz to soft X-ray. In LASOR center, a variety
of materials sciences, such as semiconductors, stronglycorrelated materials, molecular materials, surface and interfaces, and bio-materials, are studied using advanced lightsources and advanced spectroscopy. Another aim of LASOR
center is to promote the collaboration between the advanced
photon sciences and materials sciences. Most of the research
activities on the development of new lasers with an extreme
performance and the application to material science arestudied in specially designed Buildings D and E with large
clean rooms and the isolated floor in Kashiwa Campus. On
the other hand, the experiments utilizing the synchrotron
radiation are performed at beamline BL07LSU in SPring-8(Hyogo) by Synchrotron Radiation Laboratory in LASOR
center.

Laser and Synchrotron Research Center
Laser and Synchrotron Research (LASOR) Center started
from October, 2012. LASOR center consists of extreme
laser groups and Synchrotron Radiation Laboratory. LASOR
center develops new lasers with extreme performance ofultra-precise, high intensity and ultra-short pulse lasers,
and the cutting edge synchrotron radiation beamline in soft
X-ray region. LASOR center is responsible for the advanced
spectroscopy, such as ultra-high resolution photoemission,

Fig. 1. Open ceremony of LASOR center

ISSP Activity Report 201233

Unconventional Magnetic andThermodynamic Properties of S = 1/2
Spin Ladder with Ferromagnetic Legs
H. Yamaguchi and T. Sakakibara
Spin-ladder systems have been investigated both theoretically and experimentally in relation in particular to fieldinduced quantum phase transitions and high-Tc superconductivity. Among these systems, antiferromagnetic (AFM)
two-leg spin ladders, which have AFM rung and leg interactions, have been most extensively studied and have turned
out to show attractive behaviors originating from theirstrong quantum fluctuations. By contrast, a spin ladder withferromagnetic (FM) leg interactions, which can be viewed
as antiferromagnetically coupled FM chains, has not beenrealized experimentally. Its ground state and the magnetic
behavior have been discussed extensively from a theoreticalpoint of view as an example of complicated quantum spin
systems. The experimental verification of these properties
is thus quite significant for studies on complicated quantum
behavior unsuspected in conventional spin systems.
Here, we report the first model compound of an S = 1/2
two-leg spin ladder with FM leg interaction [1]. We havesucceeded in synthesizing a new verdazyl radical 3-Cl-4-F-V[3-(3-chloro-4-fluorophenyl)-1,5-diphenylverdazyl] andsolved its crystal structure. The ab initio molecular orbital(MO) calculation indicated the formation of an S = 1/2
two-leg spin ladder with FM leg and AFM rung interactions.
The experimental results of magnetic susceptibility, magnetization curve, and specific heat were successfully explained
as the expected spin-ladder model by using the quantum
Monte Carlo method.
Figures 1(a) and 1(b) show the low-temperature regionof the magnetic susceptibility and magnetic specific heat invarious magnetic fields, respectively. At higher magnetic
fields, we observed extrema of the magnetic susceptibility,
which appear almost symmetrically with respect to the curveat 3.0 T. Regarding the magnetic specific heat, the anomaly
observed at zero field splits into two peaks above 1.5 T, as
shown in Fig. 1(b). Figure 2 shows the temperature-field
phase diagram obtained from those specific temperatures.
The transition point shifts toward the high-temperature
region with an increasing magnetic field up to 3.0 T. This
type of phase boundary shape is often associated with thefield-induced phase transition in a gapped spin system. Since

Fig. 2. Magnetic field versus temperature phase diagram of 3-Cl-4-F-V
for H // a The closed circles, closed, triangles, and open triangle indicate
the transition temperatures determined from the magnetic specific heat,
the magnetic susceptibility, and its temperature derivative, respectively.
The solid vertical line indicates the saturation field.

the expected small energy gap of 1.06 K is considered todisappear owing to the weak interladder interactions, thepresent system must be in the vicinity of the quantum criticalpoint between the gapped rung-singlet and the gaplessordered phases. Considering the magnetic specific heat,
we should take into account the possibility of successive
phase transitions, which is often induced by large magnetic
anisotropy and/or noncollinear magnetic structure. Since
organic radical systems have negligibly weak magnetic
anisotropy, we can suggest the possibility of noncollinear
magnetic structure induced by frustration. The MO calculation indicated that there are three kinds of possible smallinterladder interactions. These three interactions can form
frustrated lattices, and then a noncollinear magnetic structure will appear. This unexpected field-induced successive
phase transition possibly originates from the interplay of
low dimensionality and frustration. The present results will
stimulate studies on spin ladder with FM interactions andunconventional behavior of the complicated quantum spin
systems.
Reference[1] H. Yamaguchi, K. Iwase, T. Ono, T. Shimokawa, H. Nakano,Y. Shimura, N. Kase, S. Kittaka, T. Sakakibara, T. Kawakami, andY. Hosokoshi, Phys. Rev. Lett. 110, 157205 (2013).

Authors
H. Yamaguchia, K. Iwasea, T. Onoa, T. Shimokawab, H. Nakanoc,
Y. Shimura, N. Kase, S. Kittaka, T. Sakakibara, T. Kawakamic, andY. HosokoshiaaOsaka Prefecture Universityb
Kobe UniversitycUniversity of HyogodOsaka University

Axion Electrodynamics and Condensed Matter
H. Ooguri and M. Oshikawa
Fig. 1. Temperature dependence of (a) the magnetic susceptibility and(b) Cm/T of 3-Cl-4-F-V in various magnetic fields for H // a. The arrows
indicate the phase transition temperatures. For clarity, Cm/T for 1.0,
1.5, 2.0, 3.0, 4.0, and 4.5 T have been shifted up by 0.2, 0.4, 0.7, 1.3,
1.7, and 2.5 J•mol-1•K-2, respectively. The inset shows the temperature
derivative of the magnetic susceptibility at 0.5 T.

34

ISSP Activity Report 2012

Condensed matter physics and high-energy physics
deal with phenomena at very different scales. Nevertheless, surprisingly often we encounter similar mathematicalstructures in these two different subfields of physics. Indeed,those encounters have been very fruitful for new devel-

Band-Gapped Graphene Nanoribbons
Made by Molecular Beam Epitaxy
S. Tanaka and F. Komori

Fig. 1. The phase transition of the “axion” field takes place under
an applied electric field E 0 above the critical value. It results
in a spontaneous generation of magnetic field, even though nomagnetic field is applied externally. (Figure drawn by Euan McKay
and Azusa Minamizaki, reprinted from Todai Research Editor’s
Choice: http://www.u-tokyo.ac.jp/en/todai-research/editors-choice/theory-of-undiscovered-elementary-particle-applied-to-topologicalinsulator/ )opments in physics: notable examples include Nambu’s development of spontaneous symmetry breaking in field
theory with a hint from superconductivity, and Wilson’s
renormalization group unifying critical phenomena and field
theory. Very recently, application of AdS/CFT correspondence to condensed matter is actively pursued. The foundation of IPMU (Institute for Physics and Mathematics of
the Universe, now Kavli IPMU) in 2007 and opening of its
building next to ISSP in 2010 provides a great opportunity
for ISSP. In 2010, IPMU and ISSP co-hosted a workshop“Condensed Matter Physics Meets High-Energy Physics” tostimulate exchanges between the two fields.
Here we report on a recent joint research [1] between
the two institutes. “Axion” is a hypothetical elementary
particle, which has not yet been detected experimentally, but could be a key to solve mysteries in high-energy
physics and cosmology. Recently, instability of axion fieldin the presence of strong electric field has been pointed
out in high-energy physics. While the original axion as anelementary particle would not directly appear in condensed
matter, it was pointed out [2] that doping of magnetic ionsto a topological insulator results in fluctuating magnetic
moments, which could be described by a similar field theory
as the one of axions. We investigated the instability of the“axion” field in the condensed matter realization. It also
led to a understanding of the physical mechanism of theinstability, and to the clarification of the final state reached
as a result of the instability. Above a critical electric field,
magnetic field is spontaneously generated, and the excess
electric field is screened by the effective surface charge
induced by the deformation of the “axion” field and themagnetic field.

Graphene nanoribbons (GNRs) are attracting much attention in solid state physics and nanoelectronic applications,where the band-gap opening or modification of the electronic
structure at K-points is a central interest. The electronic
structure at K-points in GNRs has been theoretically shownto depend on the type of edge geometry: armchair or zigzag[1]. Semiconducting characteristics are expected in thecase of armchair edges owing to the band-gap openingat K-points. As the width of GNRs is reduced, the gap isincreased by both electron confinement and edge effects.
However, realization of GNRs with atomically well-definededges and providing experimental evidences of the gap
opening at K-points remain challenging. Here we demonstrate a new approach for producing a dense array of aligned
GNRs on unique SiC surfaces [2] as templates via molecular beam epitaxy (MBE), and show band-gap openings
at K-points visualized by angle-resolved photoemission
spectroscopy (ARPES) [3].
In the present study, we used an off-axis SiC substrate(Si-face, 4º off toward [1-100]), and first prepared aself-ordered periodic structure consisting of pairs of a (0001)
basal plane terrace and a (1-10n) nanofacet (n = 35~37) witha characteristic periodicity of ~ 20 nm by H2 gas etching[2]. A typical atomic-force-microscopy (AFM) image of thesubstrate and a model are shown in Fig. 1. After cleaning thesurface of the substrate under —Si flux—at 1050ºC, a carbon
mono-atomic layer with (6√ 3 × 6√ 3 )R30º registry wasgrown exclusively on the SiC terrace by MBE. Finally, thesamples were exposed to H2 gas at 600ºC for 1 h to transform the carbon layer into quasi-free-standing graphene byhydrogen intercalation. The GNRs thus made have armchairedges parallel to the step edge of the substrate. Quality of thegraphene was evaluated by AFM, scanning tunneling microscopy, reflection high-energy electron diffraction, low-energy
electron diffraction, and Raman spectroscopy.
Figure 2(a) shows the ARPES result along the Γ-K-M
lines of the graphene surface Brillouin zone. The measured
Γ-K-M direction in k-space corresponds to the [1-100] direction in real space, which is perpendicular to the edges of
the GNRs. A conduction band is invisible, and the valenceband is folded at the K-point area, as shown in Fig. 2(b). No
states are detected at the K-point between the Fermi energy(EF) and top of the valence band, which is 0.14 eV below EF.

References[1] H. Ooguri and M. Oshikawa, Phys. Rev. Lett. 108, 161803 (2012).
[2] R. Li, J. Wang, X.-L. Qi, and S.-C. Zhang, Nature Phys. 6, 284(2010).
Authors
H. Ooguria and M. OshikawaaKavli IPMU and California Institute of Technology

Fig. 1. (a) An AFM 3-dimensional view of the vicinal SiC(0001)
surface after hydrogen etching, showing a periodic array of terrace andfacet structure. (b) A schematic drawing of the SiC surface in (a). Thiswas derived from high-resolution transmission electron microscopy
images. Each pair of array consists of the (0001) terrace and (1-10n)
facet, and is ordered with the periodic distance of ~ 20 nm. Here, n = 35~37. The width of each (0001) terrace is ~ 10 nm.

ISSP Activity Report 201235

Fig. 2. Intensity map (a) and energy distribution curves (EDCs) (b) of
the ARPES spectra around the K-point for the GNRs on the vicinal
SiC(0001) substrate. The spectra are taken along the Γ-K-M line. The
EDCs show the folding of the valence band at the K-point below EF.
The red dots in (a) indicate the positions of the EDC peaks and represent band dispersion around the K-point. The intensity map indicates alinear dispersion, which is consistent with the valence band of singlelayer graphene.

The band-gap value can be more than 0.28 eV if we assume
a slight p-type doping in the sample as in the case of thehydrogen-intercalated graphene on SiC(0001). This value isconsistent with the theoretical estimation for the GNR withthe width of 10 nm.
References[1] K. Nakada et. al., Phys. Rev. B 54, 17954 (1996).
[2] H. Nakagawa et. al., Phys. Rev. Lett. 91, 226107 (2003).
[3] T. Kajiwara et. al., B 87, 121407(R) (2013).
Authors
T. Kajiwaraa, Y. Nakamoria, A. Visikovskiya, T. Iimori, F. Komori,K. Nakatsujib, K. Masec, and S. TanakaaaKyushu UniversitybTokyo Institute of TechnologycHigh Energy Accelerator Research Organization

Spin Filtering in Oxide Tunnel Junctions
I. Ohkubo, T. Harada, and M. Lippmaa
The operation of conventional functional tunnel devices,such as tunnel magnetoresistance junctions or Josephson
junctions, is derived from the physical properties of theelectrode materials, such as soft ferromagnets or superconductors. The tunnel barrier is usually a passive element ina junction, simply providing a suitable separation between

Fig. 1. Cross-sectional electron microscope image and a schematic
diagram of a spin-filter tunnel junction consisting of normal metal(NM) LaNiO3 (LNO) injection electrode, a Pr0.8Ca0.2Mn1-yCoyO3(PCMCO) tunnel barrier, a SrTiO3 (STO) spacer, and a ferromagnetic(FM) spin detector La0.6Sr0.4MnO3 (LSMO).

36

ISSP Activity Report 2012

the functional electrodes. The appearance of a ferromagnetic insulator state in mixed-valent manganites opens a
possibility to construct a different type of junction, where
the electrodes are passive and the functional element is
the tunnel barrier itself. The junctions developed in thisproject contain tunnel barriers made of 10 to 12 unit cells of
Pr0.8Ca0.2Mn1-yCoyO3 [1]. The ferromagnetic insulatingstate can be achieved by a suitable Pr/Ca ratio, while thesaturation magnetization can be adjusted by Co doping. The
electrodes of the junctions were made of a normal metal
LaNiO3 and a ferromagnetic metal La 0.6Sr0.4MnO3, as
illustrated in Fig. 1. Electrons tunneling from the LaNiO3electrode to the La0.6Sr0.4MnO3 side see different barrierheights, depending on spin state, due to an exchange splittingin the magnetic barrier layer. The spin injection rate into theferromagnetic La0.6Sr0.4MnO3 electrode is thus different for
spin-up and spin-down electrons.
The La0.6Sr0.4MnO3 layer in the junction works not
only as a metallic electrode but also as a built-in ferromagnetic spin detector. Due to strong spin polarization in
La0.6Sr0.4MnO3, a spin-filtered tunneling current can only
flow through the device when the magnetization directionsin the ferromagnetic barrier and electrode layers are parallel.
The efficiency of the tunnel barrier spin filter can therefore
be determined easily by measuring the junction resistanceas a function of an applied magnetic field (Fig. 2). Sucha plot shows high resistance when the applied field is has
just changed sign and the magnetically soft La0.6Sr0.4MnO3electrode layer magnetization has flipped antiparallel to thetunnel barrier layer. Above the coercive field of the barrier
layer, at an applied field of about 200 mT, the whole device
magnetizes in the same direction and the total resistance
drops sharply. The magnetoresistance ratio of over 100% isamong the largest seen for any spin-filter junction.
Spin-filter junctions have several interesting uses, themost important being an efficient spin injector for semiconducting spintronic devices. Since the material in contact witha semiconductor is insulating, a spin-filter tunnel junction
injector does not suffer from an impedance mismatch that
occurs when a ferromagnetic metallic electrode is used asa spin-polarized current source in a semiconductor device.
Analysis of spin filter efficiencies and inelastic electron
tunneling spectroscopy showed that the choice of thenormal metal electrode material is important in achieving
efficient spin injection [2]. The use of a perovskite-type
LaNiO3 electrode that was lattice matched (Fig. 1) with theinsulator layer greatly increased the magnetoresistance ratioof the junctions, indicating improved spin filtering contrast.
An approximate matching of the Fermi surface shapes

Fig. 2. Tunnel magnetoresistance response of a spin-filter tunnel
junction at 4 K, showing a resistance switching ratio of over 100%.

of the electrode materials appeared to reduce scatteringof tunneling electrons, further improving the spin filter
efficiency.
References[1] T. Harada, I. Ohkubo, M. Lippmaa, Y. Sakurai, Y. Matsumoto,
S. Muto, H. Koinuma, and M. Oshima, Adv. Funct. Mater. 22, 4471
(2012).
[2] T. Harada, I. Ohkubo, M. Lippmaa, Y. Sakurai, Y. Matsumoto,
S. Muto, H. Koinuma, and M. Oshima, Phys. Rev. Lett. 109, 076602(2012).
Authors
T. Harada, I. Ohkuboa,b, M. Lippmaa, Y. Sakuraib, Y. Matsumotoc,
S. Mutod, H. Koinumae,f and M. OshimabaNational Institute for Materials Scienceb
Department of Applied Chemistry, University of Tokyo
c
Tokyo Institute of TechnologydNagoya UniversityeGraduate School of Frontier Sciences, University of Tokyof
Pusan National University

Anisotropy of Upper Critical Field ina One-Dimensional Organic System,(TMTTF)2PF6 under High Pressure
M. Kano and M. Itoi
The Bechgaard salt (TMTSF)2PF6 (TMTSF = tetramethyltetraselenafulvalene) was the first organic superconductor
discovered in 1980 with a superconducting temperature of
Tc = 0.9 K (critical pressure, Pc =1.2 GPa) [1]. Since this
discovery, materials based on TMTSF and its derivatives,
such as TMTTF (tetramethyltetrathiofulvalene), the so-called(TMTCF)2X (X = monovalent anion) series, have been
investigated extensively to search for other superconducting
behaviors. They also attracted attention owing to their richproperties such as spin-Peierls (SP), charge-ordering (CO),spin density wave (SDW), and possible unconventional
superconductivity (SC) that appear by changing the counterFig. 1. The temperature-dependent resistivity of (TMTTF)2PF6 wasmeasured up to 7 GPa using a turnbuckle-type diamond anvil cell(DAC) and at magnetic fields of up to 5 T. The applied magnetic fields
were (a) parallel to the a-axis at P =4.58 GPa, (b) b’-axis at P = 4.37
GPa and (c) c*-axis at P = 4.58 GPa.

Fig. 2. Hc2 curves with applied fields H || a, H || b’ and H || c* for P =(a) 4.48, (b) 5.10 and (c) 5.64 GPa obtained by using the onset criterion.

anion or by applying external pressure [2]. Many compoundswith TMTSF molecules exhibit an SC state at low pressuresof approximately 1 GPa, whereas most compounds with
TMTTF exhibit an SC transition at ultra high pressures,for example, Pc= 5 GPa in (TMTTF)2PF6 [3,4,5]. Taking
advantage of the low pressure induced and ambient pressure
superconductivity, the characteristic for SC phase has been
well studied with TMTSF salts, but rarely with TMTTF
salts owing to the technical difficulty in applying hydrostaticpressure to the fragile organic compounds at low temperatures in magnetic fields. Recently, we have succeededin resistivity measurement by using a turnbuckle-type
Diamond anvil cell (DAC) on (TMTTF)2PF6 under multiextreme conditions which was previously difficult to achieve[6]. We report on the characteristic superconductivity on(TMTTF)2PF6.
The resistivity of (TMTTF)2PF6 one-dimensional exhibits
strong anisotropy at ambient pressure. In the stacking direction of TMTTF molecules (a-axis), the metal–insulator(M–I) transition was suppressed with increasing externalpressure, and the superconductivity was observed in therange of P = 4.18 to 6.03 GPa. The highest SC transition
temperature is Tc =2.25 K at 4.58 GPa, and no SC transition was observed above P = 6.96 GPa. The presence ofzero resistance was confirmed at approximately 1.5 K in thepressure range of 4.18 ≤ P ≤ 4.58 GPa.
Data of resistivity vs temperature at P = 4.37-4.58 GPawith the field along three different axes are shown in Fig. 1,
and the temperature dependence of Hc2 along the three axeson (TMTTF)2PF6 is described in Fig. 2.
The Hc2 has a positive curvature without saturation,
which may be attributed to an FFLO state, for a magnetic
field along the a (intra-chain direction) – and b’(inter-chain
direction)- axes at T ≥ 0.5 K for P = 4.48 GPa. We also haveshown that the upturn feature is suppressed with increasingpressure and the orbital pair breaking mechanism becomesdominant. In further studies of the pair breaking mechanism,

ISSP Activity Report 201237

measurement should be conducted at lower temperatures andwith more refined pressure control. Our data above T = 0.5 K
shows that Hc2 slightly exceeds the Pauli paramagnetic limit
at P =4.48 GPa for H || a . Hc2 curves for H || a and H || b’ lie
on top of each other indicating that it has a two-dimensionallike feature, being isotropic within the ab’ -plane. GL coherence lengths were obtained, which are highly anisotropic, forexample, ξa : ξb’ : ξc= 5 : 5 : 1 at P = 5.64 GPa. The interlayer
coherence length ξc is much larger than the thickness of the
conducting sheet for all pressures, which is c/2 ~ 6.5 Å ,where c is a lattice parameter of (TMTTF)2PF6. These results
revealed that (TMTTF)2PF6 is an anisotropic three-dimensional superconductor.
References[1] D. Jérome, A. Mazaud, M. Ribault, and K. Bechgaard, J. Phys. Lett.
41, 95 (1980).
[2] D. Jérome, Science 252, 1509 (1991).
[3] T. Adachi, E. Ojima, K. Kato, H. Kobayashi, T. Miyazaki,
M. Tokumoto, and A. Kobayashi, J. Am. Chem. Soc. 122, 3238 (2000).
[4] D. Jaccard, H. Wilhelm, D. JeÅLrome, J. Moser, C. Carcel, andJ. M. Fabre, J. Phys.: Condens. Matter 13, L89 (2001).
[5] C. Araki, M. Itoi, M. Hedo, Y. Uwatoko, and H. Mori, J. Phys. Soc.
Jpn. 76, Suppl. A 198 (2007).
[6] M. Kano, H. Mori, K. Matsubayashi, M. Itoi, M. Hedo,
T. P. Murphy, S. W. Tozer, Y. Uwatoko, and T. Nakamura, J. phys. Soc.
Jpn. 81, 024716 (2012).
Authors
M. Kano a , H. Mori, K. Matsubayashi, M. Itoi b , M. Hedo c ,T. P. Murphyd, S. W. Tozerd, Y. Uwatoko, and T. NakamuraeaTohoku Universityb
Nihon UniversitycUniversity of the RyukyudNational High Magnetic Field LaboratoryeInstitute for Molecular Science

Topological Hall Effect in Spin Ice
Conduction Systems - Application to
Exotic Hall Response in Pr2Ir2O7 M. Udagawa
Topological Hall effect (THE) is a hallmark of modern
condensed matter physics. We have addressed the THE
in conduction electron systems interacting with spin ice,
which is one of the prototypical magnetic states arising fromgeometrical frustration. This setting is relevant to Pr2Ir2O7,
where conduction electrons due to Ir 5d bands interact withPr magnetic moments forming spin ice. In this compound,
Hall conductivity shows highly non-monotonous and anisotropic behavior [1], while the conventional mechanismsof Hall conductivity lead to monotonously increasing Hall
conductivity with magnetic field.
To address this peculiar Hall response, we started withthe construction of general theory of THE in spatiallyinhomogeneous systems. As the simplest case, we considered
Ising Kondo lattice model on a kagome lattice with [111]type easy-axes anisotropy. Through the numerical diagonalization of this model, we found a characteristic crossoverwith respect to spin-electron coupling, J (Fig 1. (a)). For
small J, the Hall conductivity is scaled as ∝ J3, where realspace spin scalar chirality spanned by three localized spinsacts as an independent skew scatterer. On the other hand,for large J, the Hall conductivity converges to a finite value,
where the electron spins are forced to align parallel to the
localized moments.
Motivated by the clear identification of J3 scaling in

38

ISSP Activity Report 2012

Fig. 1. (a) J and damping rate dependence of Hall conductivity of theIsing Kondo lattice model on a kagome lattice. Clear J3 scaling can beobserved in a weak-coupling region. (b) Schematic picture of double
pyrochlore lattice. On one sublattice (brown), localized moments
reside, while on the other (green), conduction electrons are defined.
(c) Magnetic field dependence of Hall conductivity in the Ising Kondo
lattice model on a double pyrochlore lattice. Steep kink is observed for
H||[111], signaling the onset of kagome ice correlation.

weak coupling region, we applied the third-order perturbation theory [2] to the Hall conductivity of Pr2Ir2O7, in which
the coupling between conduction electrons and Pr moments
arises from superexchange process and is small. To describe
this compound, we adopt the Ising-type Kondo lattice model
on a double pyrochlore lattice, where conduction electrons
defined on one pyrochlore sublattice interact with localized
Ising moments residing on the other pyrochlore sublattice(Fig 1. (b)). We calculate Hall conductivity by combining thethird-order perturbation theory and Kubo formula.
As a result, we could successfully reproduce thenon-monotonic behavior of Hall conductivity (Fig 1. (c)).
In particular, for [111] magnetic field, the Hall conductivity
shows steep peak at a relatively low field, then decreases,
leading to sign reversal. These results well capture the mainfeatures of experimental data. One of the main implicationsof our analysis is that the peak for H||[111] can be associatedwith the crossover from zero-field spin ice state to kagomeice-like state[3]. So far, this peak has been associated withthe spin ice (2-in 2-out) to fully saturated state (3-in 1-out
and 1-in 2-out)[1,4]. We thank R. Moessner for fruitful
discussions.
References[1] Y. Machida et al., Phys. Rev. Lett. 98, 057203 (2007).
[2] G. Tatara and H. Kawamura, J. Phys. Soc. Jpn. 73, 2624 (2004).
[3] M. Udagawa and R. Moessner, submitted to Phys. Rev. Lett.
[4] T. Tomizawa and H. Kontani, Phys. Rev. B 82, 104412 (2010).
AuthorM. Udagawa
University of Tokyo

Direct Observation of Antiferromagnetic
Order by Neutron Diffraction of s-Electrons
Confined in Regular Nanospace of Sodalite
T. Nakano and M. Matsuura
Various kinds of magnetically ordered state, such as
ferromagnetism, antiferromagnetism, and ferrimagnetism,
have been found in alkali metal nanoclusters arrayed inregular nanospace of aluminosilicate zeolite crystals. The
magnetic properties depend on the zeolite framework structures, the species of alkali element and the electron densityof the clusters. They are quite a new class of magnetic
materials because the magnetic orderings are realized by
the mutual interaction between s-electrons confined in thenanospace and they contain no magnetic elements such astransition metal or rare earth metal. In this article, we report
the first direct observation of long-range magnetic orderingof s-electrons by neutron diffraction (ND) [1].
Sodalite is a kind of aluminosilicate zeolites. As shownin Fig. 1 (a), truncated-octahedron-shaped β-cages arearrayed in a body-centered cubic (bcc) structure. The inside
diameter of the β-cage is approximately 0.7 nm. The framework Al3Si3O12 is negatively charged and three Na+ ions are
distributed in the cage. By the loading of guest Na atom into
sodalite, Na43+ cluster can be formed in the β-cage as shownin Fig. 1 (b). In the cluster, one unpaired s-electron provided
by the guest Na atom is shared among four Na+ ions andconfined in the cage. When the clusters are formed in all
the cages, antiferromagnetic (AFM) ordering appears below
the Néel temperature of TN = 48 K because of the exchangeinteraction between adjacent clusters via the window of the
cage. The magnetic phase transition has been confirmed bysusceptibility, ESR, NMR, μSR and so on, but there havebeen no reports on determining the magnetic structure. Thismight be due to the difficulties originated from the large
unit cell and resultant low spin density. In the present study,
we prepared approximately 2 grams of powder specimen of
Na-loaded sodalite and performed ND experiments for the
first time by utilizing the spectrometer PONTA at the JRR-3
at JAEA.
We succeeded in observing the 001 and 111 magnetic
Bragg peaks at low temperature. The intensity was nearly
three orders of magnitude weaker than that of the 011
nuclear Bragg peak. The temperature dependence of theintensity of 001 peak was well fitted by using a phenomenological equation of the order parameter with a threedimensional Heisenberg antiferromagnet. The simultaneous
observation of 001 and 111 magnetic Bragg peaks is consis-

Fig. 2. Magnetic form factor of Na clusters in sodalite for scatteringvector q. The closed circles show experimental results obtained by 001
and 111 magnetic Bragg peaks. The dotted curve shows the form factor
evaluated from the 1s wave function in the spherical well potential with
the inner diameter of 0.7 nm.

tent with the magnetic structure shown in Fig. 1 (c) where
the electronic spin in the body center cluster and that in
the corner cluster are antiparallel in the bcc lattice. We also
evaluated the magnetic form factor from the ratio of theintegrated intensities of the 001 and 111 magnetic Bragg
peaks to the 011 nuclear one. The form factor is found todump very quickly as a function of q as shown in Fig. 2. The
simplest model describing the electron wave function of thecluster is a spherical well potential model with the diameterof the cluster. The dotted curve in Fig. 2 shows the calculated
form factor of the 1s wave function confined in the sphericalwell with the inner diameter of 0.7 nm. The calculation
results are in good agreement with the experimental ones.
Therefore, it is evident that the s-electron responsible for
the AFM order possesses a wave function delocalized overnanometer size in the cluster.
Reference[1] T. Nakano, M. Matsuura, A. Hanazawa, K. Hirota, and Y. Nozue,
Phys. Rev. Lett. 109, 167208 (2012).
Authors
T. Nakanoa, M. Matsuuraa,b, A. Hanazawaa, K. Hirotaa, and Y. NozueaaOsaka UniversitybPresent Address: CROSS Tokai

Marked Change in the Ground
State of CeRu2Al10 Induced by
Small Amount of Rh Substitution
M. Sera, T. Nishioka, and K. Kindo

Fig. 1. Schematic illustrations of (a) crystal structure of aluminosilicate sodalite, (b) Na43+ cluster formed in the β-cage, and (c) magnetic
structure model of Na clusters in sodalite. The framework of sodalite
consists of Si, Al and O covalent-bonding network. The β-cages withan inner diameter of 0.7 nm are arrayed in a bcc structure. In the Na43+
cluster, one unpaired s-electron is shared among four Na+ ions andconfined in the β-cage. Under the antiferromagnetic ordered state, theelectronic spin in the body center cluster and that in the corner cluster
are coupled in antiparallel in the bcc lattice.

The recently discovered Kondo semiconductor CeT2Al10(T = Ru, Os, Fe) has attracted much attention because of
their unusual ground states. Among many Kondo semiconductors, CeRu2Al10 and CeOs2Al10 are very rare systems
exhibiting antiferromagnetic (AFM) order at T0 ~ 30 K
[1, 2]. As has been revealed by extensive studies up tonow, the AFM ordered phases in these two compounds are
strange. The AFM moment (MAF) is parallel to the c-axis,
which is not expected from the large anisotropy in magnetic
susceptibility (χa > χc > χb) in the paramagnetic region.
Here, χa is the magnetic susceptibility along the a-axis, etc.
The transition temperature is relatively high considering

ISSP Activity Report 201239

Fig. 1. (a) Temperature dependence of magnetic susceptibility ofCe(Ru1-xRhx)2Al10 (x = 0, 0.05) along the a-, b-, and c-axes measured
at 1 T. (b) Magnetization curve of Ce(Ru0.95Rh0.05)2Al10 under various
temperatures for H // a axis. The inset shows the M–H curve ofCe(Ru1-xRhx)2Al10 (x = 0, 0.05) at T = 1.3 K for the H // a-axis.

in χc below T0 observed in CeRu2Al10 originating from
MAF // c disappears by Rh substitution. These results
suggest that the AFM order with MAF // a occurs below
T0. In Fig. 1(b), we show the magnetization (M) curves ofCe(Ru0.95Rh0.05)2Al10 under various temperatures for the
H // a-axis. In Ce(Ru0.95Rh0.05)2Al10, at 1.3 K, M exhibits
a spin-flop transition at ~ 13 T. M at 50 T is ~ 1.4μB/Ce,which is larger than ~1.3μB/Ce for x = 0. This suggests a
more localized nature of Ce ions in Ce(Ru0.95Rh0.05)2Al10
than in CeRu2Al10. The experimental results were analyzed
by mean field calculation for the two-sublattice model using
the crystalline electric field (CEF) level scheme obtained by
Strigari et al. and the anisotropic exchange interaction [4,5].
The calculated results of χ along the three crystal axes areshown in Fig. 2. χa in the paramagnetic region and a sharp
peak at T0 are reproduced well by the calculation. χc andχb, which are nearly independent of temperature, are also
reproduced. On the basis of both experimental and calculated results, we conclude that, by a small amount of Rh
substitution with one extra 4d electron, the large c-f hybridization along the a-axis, leading to the unusual ground stateof CeRu2Al10, is markedly suppressed and the Ce ion in a
Rh-substituted sample becomes close to the normal localized
magnetic ion.
References[1] T. Nishioka et al., J. Phys. Soc. Jpn. 78, 123705 (2009).
[2] D. D. Khalyavin et al., Phys. Rev. B 82, 100405 (2010).
[3] A. Kondo et al., Phys. Rev. B 83, 180415 (2011).
[4] F. Strigari et al., Phys. Rev. B 86, 081105 (2012).
[5] K. Kunimori et al., Phys. Rev. B 86, 245106 (2012).
Authors
A. Kondo, K. Kindo, K. Kunimoria, H. Noharaa, H. Tanidaa, M. Seraa,
R. Kobayashib, T. Nishiokac, and M. Matsumuraca
Hiroshima UniversitybJapan Atomic Energy Agencyc
Kochi University

Fig. 2. Temperature dependence of magnetic susceptibility for H // a-,b-, and c-axes at 1 T calculated by mean field calculation using CEF
level scheme obtained by Strigari et al. The solid lines represent thecalculated results with the anisotropic exchange interaction of (Jaex,
Jbex, Jcex) = (-7.3 K, -27 K, -40 K). The symbols are experimental
results of Ce(Ru0.95Rh0.05)2Al10.

the long distance (5.2 Å) between Ce ions. Although T0 is
high, the ordered moment is as small as 0.3 ~ 0.4μB/Ce. In
our previous paper, we reported the high field magnetization
curve of CeRu2Al10 and CeOs2Al10 for the magnetic field(H) along the a-axis, and proposed that the unusual AFM
ordered phase in this system is caused by the large hybridization between the conduction band and the nearly localized 4f
shell (c-f hybridization) along the a-axis, leading to the AFM
order with MAF // c [3].
Quite recently, Kobayashi et al. have reported the marked
change in the magnetic susceptibility of CeRu2Al10 by Rh
substitution [Ce(Ru1-xRhx)2Al10, x = 0.1, 0.2, and 0.3]. They
found in these compounds that, below ~ 150 K down to T0,
χa is strongly enhanced and shows a very large decrease withdecreasing temperature after showing a sharp peak at T0,
and thus suggested a possible AFM order with MAF // a. To
clarify the origin of the marked change in the ground state by
Rh substitution, we studied the magnetic susceptibility andhigh field magnetization of Ce(Ru0.95Rh0.05)2Al10.
Figure 1(a) represents the temperature (T) dependenceof χ of Ce(Ru1-xRhx)2Al10 (x = 0, 0.05) along the a-, b-,
and c-axes measured at 1 T. In Ce(Ru0.95Rh0.05)2Al10,
χa shows a large decrease with decreasing temperature
after showing a sharp peak at T0 ~ 24 K and the decrease

40

ISSP Activity Report 2012

Gigantic Negative Magnetoresistance
Effects in Pyrochlore Iridates
K. Matsuhira, M. Tokunaga, and M. Wakeshima
Since the discovery of high-Tc superconductivity incuprate materials, physical properties of 3d transition
metal oxides have been extensively studied. In this class ofmaterials, strong Coulomb interaction dominates the otherFig. 1. Schematic illustration of the Ir-sites in the pyrochlore structure.
Corner shared tetrahedra form three-dimensional network of the ions.
The brown arrows represent the magnetic moments in the Ir ions.

Cyclotron Resonance Studies in
Ferromagnetic Semiconductors
G. A. Khodaparast and Y. H. Matsuda

Fig. 2. Longitudinal magnetoresistance of a high-purity poly-crystal of
Nd2Ir2O7 [5]. The observed hysteresis can be caused by the change intemperature due to the magneto-caloric effect. Inset shows temperaturedependence of the resistance at 0 T and 56 T.

interactions. Various interesting phenomena show up as aresult of the interactions between charge carriers and local
spins in the orbitals determined by the strong crystal electricfields. On the other hand, 5d transition metal oxides involve
strong spin-orbit interaction, and hence, come to attract
considerable attention as a playground for novel physics.
In particular, rare-earth iridates Ln2Ir2O7 (Ln: lanthanoid
elements) are one of the attracting materials because of thegeometrical frustration in the pyrochlore structure (Fig. 1).
The series of Ln2Ir2O7 with Ln = Nd, Sm, Eu, Gd, Tb,
Dy, and Ho exhibit metal-insulator transition when the Ir
spins order at temperatures between 33 K and 141 K [1, 2];
the Ir moments exhibit the antiferromagnetic ordering with
q=0 (all-in/all-out state) shown in Fig. 1 [3, 4]. Thereby,
application of sufficiently high magnetic fields to remove thespin order is expected to induce insulator-metal transitions.
We studied magnetoresistance on high-purity polycrystals of
Nd2Ir2O7 [5] in pulsed high magnetic fields up to 56 T. The
results show prominent negative magnetoresistance effects
below the metal-insulator transition temperature of 33 K
(Fig. 2). The temperature dependence of the resistance at 56
T, however, remains semiconducting as shown in the inset of
Fig. 2. This result suggests that the magnetic field of 56 T isinsufficient to cause phase transitions in the Ir spin system.
Similar behavior is observed when the Ln is magnetic,
whereas non-magnetic Eu compound shows positive magnetoresistance effect [5]. Therefore, the observed negative
magnetoresistance effects can be caused by the reduction of
the spin fluctuation in the rare-earth ions and their coupling
to the mobile 5d electrons via the d-f interactions.

The carrier-induced ferromagnetism in magnetic III-V
semiconductors [1, 2] has opened up several opportunities
for device applications, as well as fundamental studies ofa material system in which itinerant carriers interact withthe localized spins of magnetic impurities. The origin ofcarrier-induced ferromagnetism is still controversial where
reasonable agreement between theory and experiments has
been noted for GaMnAs, but in contrast, the observationof Tc of 10 K for InMnAs films with carrier concentration of 1018cm-3 is inconsistent with theory [3]. Based ontheoretical calculations, InMnAs with a hole concentration of 1018cm-3should have a Tc of 8 K instead of theexperimentally observed 40~90 K [2]. The case for MOVPE
grown films is even more complex. Films with a carrier
concentration of 1018cm-3 have a Tc of 330 K and the Tc isnearly independent of carrier concentration [3]. In order tounderstand hole mediated ferromagnetism, probing the band
structure in these materials are crucial. Cyclotron Resonance(CR) spectroscopy is an extremely powerful tool for the
study of electronic states in semiconductors and here we
present and compare the experimental and theoretical studies

References[1] K. Mastuhira et al., J. Phys. Soc. Jpn. 76, 043706 (2007).
[2] K. Mastuhira et al., J. Phys. Soc. Jpn. 80, 094701 (2011).
[3] K. Tomiyasu et al., J. Phys. Soc. Jpn. 81, 034709 (2012).
[4] H. Sagayama et al., Phys. Rev. B 87, 100403(R) (2013).
[5] K. Mastuhira et al., J. Phys. Soc. Jpn. 82, 023706 (2013).
Authors
K. Matsuhira, M. Tokunaga, M. Wakeshima, Y. Hinatsu, and S. Takagi

Fig. 1. a) CR spectra for InMnAs and InMnSb films. The CR of
InMnSb at 295 K, was measured at 10.6 μm; whereas, the other threeresonances were measured at 10.7 μm. b) Calculated CR spectra for
InMnAs and InMnSb comparing to the experimental results in Fig.1a.
The CR resonance in InMnAs originates from a single (HH only)transition; whereas, in InMnSb it arises from multiple (both LH andHH) transitions.

ISSP Activity Report 201241

of the magneto-optical properties of p-type In1-xMnxAs andIn1-xMnxSb ferromagnetic semiconductors films in ultrahighmagnetic fields oriented along [001].
Since these magnetic semiconductors usually have low
carrier mobilities (typically of the order of 100 cm2/Vs), avery high magnetic field is necessary to observe CR (i.e., ωcτ> 1) where ωc is the cyclotron frequency. Since CR directly
provides the effective masses and scattering times of carriers,
we can obtain detailed information on the itinerancy of thecarriers while in transport measurements it is normally difficult to deduce the contributions of the mass and scattering
time independently. In addition, our observations provide
information on the band structure, sp-d exchange parameters(α, β), and the position of the Fermi level in these material
systems. Recently in GaMnAs, the tunability of the Fermi
level within the impurity band can be used to control the Tc.
CR measurements were performed using CO2, H2O, andCO lasers, providing laser radiation at 10.6, 10.7, and 16.9
and 5.53 μm. Magnetic fields exceeding 100 T were generated by a single turn coil technique. The external magnetic
field was applied along the growth direction and measured
by a pick-up coil around the sample, placed inside a continuous flow helium cryostat. Several IR wavelengths were usedas the excitation source and the transmitted signal throughthe sample was collected using a fast liquid-nitrogen-cooled
HgCdTe detector.
Figure 1a shows the results of the CR measurements
for MBE grown InMnSb (sample A) and MOVOPE grown
InMnAs with 2% Mn content. The observed cyclotron massin the InMnSb(A) is larger than that in MOVPE grown
InMnAs with similar Mn contents (x ~ 0.02). The larger holedensity in the InMnSb compared to the InMnAs, can shift
the Fermi energy to a much higher level. The cyclotron masscan be enhanced when the resonance transition takes place
between the Landau levels with higher indices. The CR of
the holes in InMnSb has been observed for the first time andin the case of Fig. 1a, the CR masses are 0.057m0 at room
temperature (RT) and 0.051m0 at 121 K. These are muchsmaller than the band edge HH mass in InSb (0.32m0). The
cyclotron mobility, μCR, was extracted from the width of
the resonance peaks. We have μCR = 4.8 × 102 cm2/(V s) at
RT and μCR = 6.0 × 102 cm2 /(V s) at 121 K. Lowering thetemperature in InMnSb increased the mobility and reduced
the effective mass, where the InMnAs resonance was notaffected significantly by lowering the temperature. The CR
absorption spectra shown in Fig.1b, is obtained from thecalculated magneto-optical absorption due to transitions
between different Landau levels. From Fermi's golden rule,the magneto-optical absorption coefficients at a given photon
energy and for a magnetic field perpendicular to the sample
can be calculated.
The observed effective mass in the InMnAs studied here
is consistent with the heavy hole (HH) mass reported inan earlier CR study of p-type MBE grown InMnAs grown
on GaAs [4] but different from the observation reported in
InMnAs with the GaSb buffer layer [5]. The MOVPE grown
InMnSb structure shows a much higher hole mobility and afactor of 100 less hole carrier density compared to the MBE
grown structures.
References[1] H. Munekata, H. Ohno, S. von Molnar, A. Segmuller, L. L. Chang,and L. Esaki, Phys. Rev. Lett. 63, 1849 (1989).
[2] T. Schallenberg and H. Munekata, Appl. Phys. Lett. 89, 042507(2006).
[3] N. Rangaraju, Li Pengcheng, and B. W. Wessels, Phys. Rev. B 79,
205209 (2009).

42

ISSP Activity Report 2012[4] Y. H. Matsuda, G. A. Khodaparast, M. A. Zudov, J. Kono, Y. Sun,
F. V. Kyrychenko, G. D. Sanders, C. J. Stanton, N. Miura, S. Ikeda,
Y. Hashimoto, S. Katsumoto, and H. Munekata, Phys. Rev. B 70,
195211 (2004).
[5] G.A. Khodaparast, J. Kono , Y. H. Matsuda, S. Ikeda , N. Miura,
Y. J. Wang, T. Slupinski, A. Oiwa, H. Munekata, Y. Sun, F. V. Kyrychenko,
G. D. Sanders, and C. J. Stanton, Physica E 21, 978 (2004).
Authors
G. A. Khodaparast a ,Y. H. Matsuda, T. R. Merritt a , H. Saito,
S. Takeyama, D. Sahab, G. D. Sandersb, C. J. Stantonb, C. Feeserc,
B. Wesselsc, X. Liud, and J. FurdynadaVirginia Techb
Department of Physics, University of FloridacNorthwestern UniversitydUniversity of Notre Dame

Pulsed Laser Ablation in Supercritical
CO2 for Nanomaterials Synthesis
T. Kato, K. Terashima, and M. Baba
Pulsed laser ablation (PLA) is a versatile technique thatallows the fabrication of high-quality thin ﬁlms in vacuum,and it has also been increasingly used in liquids for theformation and functionalization of nanomaterials. Comparedto gases and liquids, PLA in supercritical ﬂuids (SCFs) offers
further advantages for materials synthesis because of thefavorable thermophysical properties of SCFs. For instance, in
SCFs, coagulation of nanomaterials can be avoided becauseof the possibility to tune the solubility of the synthesizedmaterials. Furthermore, certain thermophysical properties of
SCFs, for instance the density fluctuation FD, which characterizes the inhomogeneity of the local molecular density,present a local maximum at the critical point.
We have applied PLA in supercritical xenon (scXe)and carbon dioxide (scCO2) near their critical points to thesynthesis of diamondoids, which are C(sp3)-C(sp3) hybridized hydrogen-terminated molecules whose cage structures

Fig. 1. (a) Schematic of pulsed laser ablation (PLA) in supercriticalcarbon dioxide (scCO2). (b) Relation of diamondoids and diamondlattice and molecular structures of lower and higher diamondoids.

Development of a Hard Magnetic Ferrite
Exhibiting a Gigantic Coercivity andHigh Frequency Millimeter Wave Rotation
A. Namai and S. Ohkoshi

Fig. 2. (a) Optical emission spectrum acquired from PLA in scCO2 near
the critical point (b) Variation of emission intensities of Ni* and O*
atomic lines and density fluctuation FD of CO2 fluid as a function ofpressure. [4]can be superimposed on a diamond lattice [1] (Fig. 1).
Despite their promising physical properties and potential fora wide range of applications, the availability of high-orderdiamondoids is still very limited [2]. Using the first
diamond member, adamantane, as a precursor and seed, we
succeeded in the synthesis of higher diamondoids that had
not been synthesized before, utilizing the dense and highly
non-equilibrium reaction ﬁeld of PLA plasmas in SCFs near
the critical point [3].
Our joint group’s study now aims to reveal the dynamics
of the PLA reaction fields generated in SCFs using spectroscopic diagnostic equipment in the Spectroscopy Sectionof the Materials Design and Characterization Laboratory,
for further improvement of the nanomaterials synthesis.
Optical emission spectroscopy (OES) gave us informationof target- and solvent-originated excited species in the PLA
reaction field. We found that the emission intensities of bothNi (target) and O atoms (originating from the CO2 solvent)reached local maxima that could be correlated to the changeof the density fluctuation FD [4] (Fig. 2). This is the firstreport on the critical anomaly in PLA dynamics in the world.
The local maxima of emission intensities are probably due
to the enhancement of the plasma excitation and effective
quenching resulting from the large FD, and it also meansthat the large number of excited species can contribute to
the nanomaterials synthesis near the critical point. Theseexperimental approaches for investigating the PLA dynamics
will strongly assist the optimization of PLA nanomaterials
synthesis in SCFs.

Magnetic ferrites such as Fe3O4 and Fe2O3 are extensively used because they are inexpensive and chemicallystable. However, due to their low magnetocrystalline anisotropies, the coercivity of magnetic ferrites is generally low.
The development of magnetic ferrites with a large coercive
field (Hc) is an important issue because this type of ferrite
can be used in various advanced applications.
In this work, we prepared rhodium-substituted ε-Fe2O3,
ε-Rh x Fe 2−x O 3 nanomagnets, by a nanoscale chemical
synthesis using mesoporous silica as a template. The
transmission electron microscope image indicates that theobtained sample is composed of nanoparticles with anaverage particle size of ca. 35 nm. The X-ray diffraction
patterns confirmed that the crystal structure is orthorhombic
with Pna21 space group (Fig. 1a). The magnetic hysteresis
loops measured at room temperature show that the Hc value
increased with rhodium substitution and ε-Rh0.14Fe1.86O3
exhibits a huge Hc value of 27 kOe. Furthermore, as shownin Figure 1b, a crystallographically oriented ε-Rh0.14Fe1.86O3
nanomagnet recorded an Hc value of 31 kOe, which is
the largest value among metal-oxide-based magnets andis comparable to those of rare-earth magnets (Hc valuesof Sm-Co and Nd-Fe-B magnet are 30 kOe and 25 kOe,
respectively). Such a gigantic Hc value is explained by thefollowing reasons. The particle size in the present series
should be sufficiently small to form a single magnetic
domain. In addition, the results of the first-principles calculations indicate strong Fe–O hybridization causing a non-zeroorbital angular momentum on the Fe ion, which induces alarge magnetocrystalline anisotropy. Furthermore, Rh–O–
Fe hybridization is observed around the Rh substituted site,which enhances the magnetocrystalline anisotropy throughthe contribution from the orbital angular momentum on Rh.
Insulating magnetic materials with high magnetic anisotropy is expected to show high-frequency zero-field ferromagnetic resonance (natural resonance). The electromagnetic

References[1] S. Nakahara, S. Stauss, H. Miyazoe, T. Shizuno, M. Suzuki,
H. Kataoka, T. Sasaki, and K. Terashima, Appl. Phys. Express 3,096201 (2010).
[2] J. E. Dahl, S. C. Liu, and R. M. K. Carlson, Science 299, 96 (2003).
[3] S. Nakahara, S. Stauss, T. Kato, T. Sasaki, and K. Terashima,
J. Appl. Phys. 109, 123304 (2011).
[4] T. Kato, S. Stauss, S. Kato, K. Urabe, M. Baba, T. Suemoto, andK. Terashima, Appl. Phys. Lett. 101, 224103 (2012).
Authors
T. Katoa, S. Staussa, S. Katoa, S. Himenoa, K. Urabea, K. Terashimaa,
M. Baba, and T. SuemotoaDepartment of Advanced Materials Science, The University of Tokyo
Fig. 1. (a) Crystal structure and (b) magnetic hysteresis of
ε-RhxFe2−xO3.

ISSP Activity Report 201243

Biexciton Luminescence from Individual
Isoelectronic Traps in Nitrogen δ-Doped GaAs
K. Takamiya, H. Yaguchi, and H. Akiyama

Fig. 2. (a) Electromagnetic wave absorption properties ofε-RhxFe2−xO3 measured by THz-TDS. (b) Rotation angle and ellipticityof the magnetized ε-Rh0.14Fe1.86O3 pellet. (c) The schematic illustrationof millimeter wave rotation.

wave absorption properties of ε-RhxFe2−xO3 were measured
under zero-magnetic field at room temperature using
terahertz time domain spectroscopy (THz-TDS). As shownin Figure 2a, resonance frequencies (fr) were observed at 182
GHz (x = 0), 186 GHz (x = 0.04), 190 GHz (x = 0.07), 198
GHz (x = 0.11), and 209 GHz (x = 0.14). The observed fr
values are the highest among all magnetic materials. Furthermore, a magnetized ε-Rh0.14Fe1.86O3 pellet sample exhibitedmagnetic rotation and ellipticity change of the propagatedmillimeter wave at 220 GHz, which is caused by gyromagnetic effect (Fig. 2b and 2c).
The gigantic Hc value has potential to be applied infuture high-density magnetic recording media because thelarge Hc value enables the particle size to be greatly reduced
while maintaining ferromagnetic properties. In addition,
ε-RhxFe2−xO3 exhibits zero-field ferromagnetic resonance
up to 209 GHz, and magnetic rotation of the propagatedmillimeter wave occurs due to an optically induced magnetic
dipole transition at 220 GHz. The present material should
be useful for high frequency millimeter wave absorbers
and rotators (isolators or circulators) since it should restrict
electromagnetic interference problems because the frequencyof the magnetic rotation corresponds to the highest windowof air (220 GHz band), which is the anticipated carrier
frequency for next-generation millimeter wave wirelesscommunications.

Single photons and entangled photon pairs are expected
to play an important role in the field of quantum information
science and technology, such as quantum key distribution
and quantum computation. Single isoelectronic traps formedby nitrogen–nitrogen (NN) pairs in GaAs are also promising
candidates for generating single photons or entangled photon
pairs [1-6]. The present paper reports on the observation ofbiexciton emission from individual isoelectronic traps innitrogen δ-doped GaAs [7].
The sample used in this study was a nitrogen δ-doped
GaAs layer grown on a semi-insulating undoped GaAs (110)substrate by low-pressure metalorganic vapor phase epitaxy.
We measured micro-photoluminescence (PL) spectra at 4.2
K using a diode-pumped solid-state laser (λ=532nm) as
the excitation source to observe the emission from single
isoelectronic traps. The spatial and energy resolutions of
the micro-PL measurement system used in this study were
~1 μm and ~30 μeV, respectively.
Figure 1 shows the excitation-power-dependent micro-PL
spectra obtained from an individual isoelectronic trap innitrogen δ-doped GaAs. As shown in this figure, sharp
emission lines with full width at half maximum of about
30 μeV, which may be restricted by the energy resolution of
the measurement system, are seen at 1.444 eV (labeled X)
and 1.436eV (labeled XX). The PL line labeled X is assigned
to the excitonic emission due to a NN pair named Z2 because
its photon energy is 1.444 eV. Figure 2 shows the intensityof the PL labeled X and XX as a function of laser power.
The intensity of the excitonic emission labeled X increases
linearly with increasing laser power while the PL intensity
labeled XX clearly shows a quadratic dependence on thelaser power under weak excitation conditions. This showsthat the emission labeled XX is due to a radiative transition
from a biexciton state to an exciton state.
In conclusion, we have observed biexciton luminescence from single isoelectronic traps formed by NN pairs innitrogen δ-doped GaAs grown on GaAs(110). The biexciton
binding energy was found to be 8 meV and almost always
constant. Thus, biexciton emission with a highly reproducible photon energy can be easily obtained from single NN
pairs in GaAs as in the case of exciton emission. Both thebiexciton and exciton emission lines show random polariza-

Reference
A. Namai, M. Yoshikiyo, K. Yamada, S. Sakurai, T. Goto, T. Yoshida,
T. Miyazaki, M. Nakajima, T. Suemoto, H. Tokoro, and S. Ohkoshi,
Nature Communications 3, 1035 (2012). [Nature Materials "ResearchHighlights" and Nature Japan "Focused Articles"]Authors
A. Namai, M. Yoshikiyo, K. Yamada, S. Sakurai, T. Gotoa, T. Yoshidaa,
T. Miyazakia, M. Nakajima, T. Suemoto, H. Tokoro, and S. OhkoshiaDowa Electronics Materials Co., Ltd.

Fig. 1. Excitation-power-dependent micro-PL spectra obtained from anindividual isoelectronic trap in nitrogen δ-doped GaAs.

44

ISSP Activity Report 2012

Fig. 2. PL intensity for the X and XX emission lines as a function oflaser power.

tion and no fine-structure splitting, which shows promise forthe application to polarization-entangled photon pairs.
References[1] Y. Endo et al., J. Cryst. Growth 298 73 (2007).
[2] Y. Endo et al., Physica E 40, 2110 (2008).
[3] T. Fukushima et al., Physica E 42, 2529 (2010).
[4] H. Yaguchi, Proc. SPIE 7945, 79452F (2011).
[5] K. Takamiya et al., Mater. Sci. Forum 706, 2916 (2012).
[6] M. Ikezawa et al., Appl. Phys. Lett. 100, 042106 (2012).
[7] K. Takamiya et al., Appl. Phys. Express 5, 111201 (2012).
Authors
K. Takamiyaa, T. Fukushimaa, S. Yagia, Y. Hijikataa, T. Mochizuki,
M. Yoshita, H. Akiyama, S. Kuboyab, K. Onabeb, R. Katayamac, andH. YaguchiaaSaitama Universityb
Department of Advanced Materials Science, The University of Tokyoc
Tohoku University

ISSP Activity Report 201245

International Conferences and Workshops
MAterial Simulation in Petaflops era (MASP2012)

June 25 - July 13, 2012
O. SuginoWith the development of petaflops supercomputers, such as K-computer, the computational condensed matter physics isundergoing a sea change. The stupendous computer power has enabled to handle very large number of parameters, allowing
thereby to apply increasingly complex formalisms. While, the massive parallelization severely limits the applicable algorithms.
In this context, top level scientists working in this field were invited from all over the world to discuss deeply (taking three
weeks) what can be achieved in the petaflops era. The topics included the high-precision many-body theories, density
functional theory (DFT) for dynamical phenomena, algorithms for very large scale DFT calculation, and application to solidliquid interface. Through the lecture of 2-3 hours and the symposium talks, followed by endless informal discussions, theattendees enjoyed the time to deeply think about the future of the computational condensed matter theories.
This event consisted of the workshop (June 25 - July 1st and July 3 - 11), where one or two lectures were given, and thesymposium (July 2, and 12 - 13), where the most recent achievement was presented. It was remarkable that some of experimentalists, invited to the symposium, are expecting the future success of joint computational and experimental research, and suchcomment was given from the field where the joint research had not been so common.
This workshop was financially supported by Computational Materials Science Initiative (CMSI) and ISSP, and the symposium was additionally supported by the Joint Research budget of ISSP. The management of the workshop was performedby Profs. Naoki Kawashima, Hiroshi Noguchi and Yoshifumi Noguchi (ISSP), Shinji Tsuneyuki and Koichi Yamashita (The
University of Tokyo), Drs. Yoshiyuki Miyamoto and Minoru Otani (The National Institute of Advanced Industrial Science andTechnology) and Drs. Takahisa Ohno and Yoshitaka Tateyama (The National Institute for Materials Science).

46

ISSP Activity Report 2012

ISSP International Workshop on Coherent Soft X-ray Sciences, and 5th Asian Workshop
on Generation and Applications of Coherent XUV and X-ray Radiation (5th AWCXR)
June 27 - 29, 2012
J. Itatani, Y. Kobayashi, and S. Shin

The joint workshop of the 5th Asian Workshop on Generation and Application of Coherent XUV and X-ray Radiation (5thAWCXR) and the ISSP International Workshop on Coherent Soft X-ray Sciences were held from June 27 to 29, 2012 at theMedia Hall, Kashiwanoha Library. The AWCXR workshop is originated from Asian Intense Laser Network. This time, it is
jointly held with the ISSP International Workshop on Coherent Soft X-ray Sciences, aiming to envisage the future direction of
new light sources such as laser-based high harmonics and XFEL's and their applications.
Because of the rapid progress in ultrafast soft-x-ray sciences, many fields are now getting close to each other. This joint
workshop has become an opportunity where various fields (e.g., intense lasers, next-generation synchrotrons, strong-field
physics and material sciences) will meet in one place to discuss the future of emerging sciences and technologies. Following are
the discussed topics:• Intense ultrafast lasers• High harmonic generation and attosecond physics• VUV frequency comb and their applications• XFEL and their applications• Strong field physics and molecular sciences• Material sciences with short-wavelength light sources
There were 2 tutorials, 35 oral presentations, and 20 poster
presentations. There were about 120 participants including
those from Korea (6), China (12) and Taiwan (1).

International Workshop on 3D Atomic Imaging at Nano-Scale Active Sites in Materials

August 6 - 8, 2012
K. Hayashi, H. Daimon, K. Gohara, T. Takahashi, J. Yoshinobu, Y. Sasaki, K. Ohoyama, and T. Matsushita“3D atomic imaging” is a quite new keyword as a scope of workshop, symposium or conference, despite of its importancefor structural analysis in materials science. Therefore, we planned the ISSP workshop of “3D-AINAS” in order to exchange
the ideas about the different analytical techniques aiming at 3D atomic imaging. We invited researchers whose specialities
were atomic resolution holography, surface/interface scattering and diffractive imaging, and discussed what is necessary forrealizing the ideal 3D atomic imaging. The ISSP workshop was consisted of 16 oral presentations and 23 poster presentations.
Two young scientists were awarded in the banquet. Over 70 participants were attended to the workshop, and had a hot discussion during the whole time. At the end of theworkshop, we got a consensus that the establishment in the 3D atomic imaging is necessary forrevealing roles of the active sites in functional
materials. The program is given at https://sites.
google.com/site/3daiworkshop/.

ISSP Activity Report 201247

ISSP Workshops
ISSP Workshop: Triple-Axis Spectrometer

April 27, 2012
T. Masuda and H. Yoshizawa

Since the fiscal year of 2010 the neutron scattering laboratory (NSL) started a new system for Instrument and Research
Team (IRT) so that the IRT members can effectively use the machine time and they promote scientific activities in a specifictheme. The members have produced excellent results in the fields of strongly correlated electron systems, frustrated system,
Fe-based superconductor, f-electron system, etc. Then, on 11th March in 2011, the east Japan earthquake attacked neutron facilities and scientists could not perform neutron experiment in Japan. Instead many Japanese scientists had opportunity to conduct
their experiments abroad thanks to the aid from foreign facilities including Oak Ridge National Laboratory (ORNL), Australian
Nuclear Science and Technology Organization (ANSTO), Korea Academic Energy Research Institute (KAERI), etc. Many
proposals of NSL joint research were transferred to these foreign facilities.
The aims of this workshop are to report the situation of the new IRT system and to present the scientific output obtained in
the IRT system and in the transferred proposals. Instrumental scientists of six triple-axis spectrometers reported current situation and management of their spectrometers. Outstanding sciences outcomes including multiferroics, Fe-based superconductivity, f-electron systems, etc., were reported by the IRT members and several frequent users. The new IRT system and scientifictopics in condensed matter physics were actively discussed by the professionals of triple-axis spectrometer.

ISSP International Workshop on Coherent Soft X-ray Sciences, and 5th Asian Workshop
on Generation and Applications of Coherent XUV and X-ray Radiation (5th AWCXR)
June 27 - 29, 2012
J. Itatani, Y. Kobayashi, and S. ShinThis ISSP workshop was held as a part of the international workshop of the same title. See the section of “International
Conferences and Workshops”.

MAterial Simulation in Petaflops era (MASP2012)

June 25 - July 13, 2012
O. SuginoThis ISSP workshop was held as a part of the international workshop of the same title. See the section of “International
Conferences and Workshops”.

48

ISSP Activity Report 2012

ISSP Workshop: Transport and Conversion Processes at Surfaces and Interfaces

July 13 - 14, 2012
J. Yoshinobu

It becomes more and more important to utilize renewable energies efficiently after the 2011 Great East Japan Earthquake.
Fundamental and applied studies towards practical use have been accelerated in the field of material science including artificial photosynthesis, water-splitting photocatalysis, thermoelectric conversion device etc. as well as solar cells. These materials
and devices are closely related to the disciplines of new material
development, optical properties of condensed matter, electronic
states of solids, electrochemistry and so on. In particular, surfaces
and interfaces between materials in devices play crucial roles,
where various energy conversion and transport processes occur
including photo excitation, charge separation, charge transport,
energy level alignment, and chemical reactions. The processes
at surface and/or interfaces could be rate limiting. In addition,energy dissipation (friction) occurs at interfaces. However,researchers in these fields have been working in different
academic communities so far. In order to overcome the compartmentalized academic areas, this ISSP workshop was held; wehave shared and exchanged our recent knowledge and idea indifferent fields. We hope that this workshop would activate thecollaboration and joint research in the future.

ISSP Workshop: Future Mission of Triple-Axis Spectrometer in Research Reactor andPolarized Neutron Scattering

July 23 - 24, 2012
T. Masuda

Neutron scattering laboratory (NSL) operates triple-axis spectrometers (TAS) installed in research reactor JRR-3 that leadthe frontier of neutron science in Japan. Meanwhile J-PARC, in which NSL owns a chopper spectrometer HRC, restarted its
operation since December 2011 and now we are in the coexistence era of JRR-3 and J-PARC. In this workshop the future roleof the TAS, the flagship of spectrometer in JRR-3, was discussed. As state of arts triple-axis spectrometers, those equipped withmulti-detectors that cover wide reciprocal space are of practical use and MACS in NIST and Flatcone in ILL were introduced
as successful examples. Meanwhile the important missions for the existing TAS were pointed out; spectrometer for polarized neutron scattering, spectrometer for general purposes from powder diffraction to inelastic neutron scattering on single
crystal, and spectrometer for education. Among them polarized inelastic neutron scattering technique is noticed as a potentially powerful one that has not been well developed because of low efficiency of polarizer. Recent progress of polarizer suchas supermirror or SEOP can be a breakthrough to realize the efficient inelastic polarized neutron scattering. Relevant research
topics in the condensed matter sciences including novel magnetic correlation, precise measurement on spin fluctuations, hybrid
mode of magnetic and lattice excitations, and etc. are introduced. Furthermore spin-echo option combined with polarized mode
enables very high energy resolution experiment that is useful to the measurement of phonon lifetime, dynamics of Skyrmion
lattice, low frequency mode of relaxor, etc. Cryopad option enables three-dimensional polarized neutron analysis and it is used
for precise magnetic structure analysis on complex structure. Thus the upgrade of polarization function in TAS is the mostimportant mission. Furthermore, the development of novel types of TAS having multi-detector is also desired. Finally the education for the students in neutron sciences is indispensable to the progress of the field and the TAS, of which the basic is simple,
plays important role. Interesting presentations and fruitful discussions were made by 11 speakers and 20 participants.

ISSP Activity Report 201249

International Workshop on 3D Atomic Imaging at Nano-Scale Active Sites in Materials

August 6 - 8, 2012
K. Hayashi, H. Daimon, K. Gohara, T. Takahashi, J. Yoshinobu, Y. Sasaki, K. Ohoyama, and T. Matsushita

This ISSP workshop was held as a part of the international workshop of the same title. See the section of “International
Conferences and Workshops”.

Frontier of Searching for Strongly Correlated Materials

October 22, 2012
Z. Hiroi, H. Kageyama, M. Nohara, and Y. Ueda

The workshop focused on the recent progress insearching for new compounds in the field of the strongly
correlated electron systems. Approximately 60 people
including 14 invited speakers got together and intensively
discussed various classes of materials such as superconductors, frustrated compounds, and heavy fermion
compounds. The workshop gave a good opportunity forattendees to understand the present status and to imagine
the future prospect of materials research. Moreover, it was
helpful in building a community for solid state chemists
and physicists.

Workshop on the Occasion of the Establishment of Laser and Synchrotron Research Center"Frontier of Laser and Synchrotron Joint Research"

November 29 - 30, 2012
T. Suemoto

Laser spectroscopy and synchrotron radiation (SOR) spectroscopy have made a considerable progress for decades as two
independent fields. Recently, these two advanced light sources become to have a large overlap in the wavelength domain fromterahertz to soft-X-ray. This workshop aimed at promoting collaboration between these two fields and we invited speakers fromboth laser and synchrotron communities under common concepts on physics and methodology. On the occasion of the establishment (Oct. 2012) of LASOR (Laser and Synchrotron Research Center) at Institute for Solid State Physics, we organized thisworkshop.
The sessions included are:(1) General introduction of the recent activity of LASOR:
Laser sources based on high harmonic generation. High performance undulator at SPring-8.
(2) Time-resolved inner shell spectroscopy:
Chemistry of adsorbed molecules and catalysts. Operand-spectroscopy. Time-resolved inner-shell spectroscopy.
(3) High resolution photoemission spectroscopy (PES):
Application of high resolution PES to new materials including strongly correlated systems, topologicalinsulators etc.
(4) Time-resolved photoemission spectroscopy:
Dynamics of photoinduced phase transitions, excited carriers in semiconductors, etc. Comparison of laser
and SOR.
On average, 80 participants were present inevery session, and we shared common science
irrespective of the light source hardware. We believethat this workshop promote growth of a merged
community of materials photon scientists.

50

ISSP Activity Report 2012

Recent Developments in Computational Condensed Matter Physics

January 10 - 11, 2013
O. Sugino, N. Kawashima, H. Noguchi, S. Todo, H. Watanabe, S. Kasamatsu, Y. Noguchi, and H. Shiba

This workshop was held cosponsored by ISSP, CCMS (center of computational material science) of ISSP, and centers of
the MEXT project “Research for Advanced Strategic Materials”. The ISSP supercomputing environment is facing sea changeby the vast computer resources provided by K-computers (and possibly the exaflops computers of the next decade) and by the
responsibility to take part in strategic material design. The ISSP supercomputer itself is going to be reinforced by the system
C (Fujitsu FX10) in the coming new fiscal year and will be replaced to novel systems in 2015. In this circumstance, the annual
ISSP supercomputer user workshop was enlarged this year to call for attendance of general computational materials scientists. The workshop started by the plenary talk by Prof. Matsuoka, a developer of Tsubame supercomputer, where the role ofGraphics Processing Unit (GPU) played in the next generation supercomputers was discussed; Prof. Yoshimoto, on behalf ofa committee of the HPCI consortium, discussed possible hardware and software requirements in the exaflops computers. In
addition to the fifteen oral presentations given by the heavy users of ISSP supercomputers, four presentations were given on the
future strategic research on advanced electronic materials, magnets, catalysts/batteries, and structural materials.

Development for Polarization-Control Experiments at SPring-8BL07LSU:
Present and Future

February 15, 2013
S. Shin, I. Matsuda, Y. Harada, and F. Komori

In the high-brilliance soft X-ray beamline BL07LSU of SPring-8, new proposals for long-term beam-time were approved
and the beam-time started last year using three regular end-stations, which were made by the construction teams. The experiments of the short-time proposals have progressed smoothly as well. In parallel, the development for polarization-controlled
experiments has been continued. This workshop was held to review the achievements of the proposals submitted this year inthis beamline and to discuss the prospects of the polarization-controlled experiments. The number of the participants was over
60. After the summary of the beamline and achievements, the present status of the development for polarized light from theundulator was first reported. Then, the plan of the further developments for the polarization control using new phase-shifters
and the application to the experimental studies of material science were proposed and discussed. In the latter half, fruitful andinteresting experimental results at the regular end-stations and at the free port were presented. The beamline has been successfully constructed, and is now used for various studies on solid-state physics and materials science related to electronic devises,
batteries and catalyses.

ISSP Activity Report 201251

Valence Fluctuations and Quantum Criticality in the Strongly Correlated Electron Systems

February 25, 2013
S. Nakatsuji, M. Takigawa, and Y. H. Matsuda

Quantum critical phenomena in the strongly correlated electron systems have attracted attention for the emergence of theexotic quantum phases such as anomalous metallic phase and anisotropic superconductivity. In this context, the heavy fermion
systems have been well-studied since the high-purity single crystal samples are available and the ground state is tunable bymagnetic field and pressure in the clean limit. As a result, anisotropic superconductivities and non-Fermi liquid behaviors
have been found in various heavy fermion systems near the antiferromagnetic quantum critical point. These studies have been
performed in the Kondo lattice systems where the valence of the rare-earth ions has the integer value. In contrast, in the valencefluctuating systems with a moderately high Kondo temperature, no instability of magnetism have been found because ofstrong screening effect. In recent years, however, the valence fluctuating systems have been found to show physical properties
indicating localization of 4f electrons, quantum critical phenomena and the superconductivities. In addition, the experimental
results based on the recent developments of microscopic/macroscopic methods imply that these anomalous behaviors arestrongly related to the valence fluctuations. Therefore, it was quite timely to organize this workshop to discuss the interestingdevelopments and the future directions.
In spite of a short announcement, a relatively large number of on/off-campus researchers reaching 38 attended thisworkshop. As the first speaker, Prof. Kazumasa Miyake from Osaka University gave a introductory lecture about the theory ofthe quantum critical valence fluctuations. Next, based on the results obtained by the various experimental methods, several talks
were made to discuss the quantum critical phenomena due to the valence fluctuations in β-YbAlB4. Distinct quantum criticalbehaviors were discussed, which were found under magnetic fields and pressure in the electric/thermal transport properties
as well as the thermal bulk properties. It was pointed out that these quantum critical behaviors are clearly different from thetypical non-Fermi liquid behaviors observed in the vicinity of the antiferromagnetic quantum critical point. The results of the
microscopic measurements including Mossbauer spectroscopy and nuclear magnetic resonance were also reported in detail.
Prof. Hisao Kobayashi from University of Hyogo reported slow valence fluctuations estimated from the latest results of the
Yb Mossbauer spectroscopy obtained by using Synchrotron Radiation. Prof. Yasuhiro Matsuda at ISSP talked about the recent
developments of the valence control by magnetic field. His talk provided an active discussion about the relation between thevalence crossover and quantum critical phenomena. The time-resolved photoemission spectroscopy was also introduced as a
new tool to measure dynamics of valence fluctuations. Finally, Prof. Hisatomo Harima from Kobe University introduced a new
viewpoint to understand anomalous properties and superconductivities in the zigzag lattice. Through this workshop, the future
direction was addressed to shed further light on this new quantum criticality.

52

ISSP Activity Report 2012

片野 進

池田 伸一

3d遷移金属化合物の圧力下における磁気特性

磁化測定装置の開発

NiCrAlを用いた圧力装置の開発

高圧下の比熱測定装置の開発

擬一次元有機物質の圧力下物性研究

中性子回折に用いる圧力装置の開発

新しい122化合物の単結晶成長の試みと圧力効
果

4

5

6

7

8

9

10

藤原 直樹

村田 惠三

11 圧力下NMR測定法に関する開発

12 有機伝導体の圧力効果

糸井 充穂

梅原 出

松本 武彦

名嘉 節

鹿又 武

He-4He希釈冷凍機を用いた走査トンネル顕微鏡 河江 達也の改良と極低温スピン偏極STMの開発

3

3

大阪市立大学

京都大学

産業技術総合
研究所

埼玉大学

日本大学

横浜国立大学

Keizo Murata

Osaka City University

Effect of pressure on the organic conductor

大学院理学研究科

National Institute ofIndustrial Science andTechnology
Kyoto University

Shinichi Ikeda

Susumu Katano

大学院人間・環Development of NMR measurement method under high pressure Naoki Fujimori
境学研究科

ナノエレクトロニ
Pressure effect of new materials
クス研究部門Developments of high pressure cell for neutron diffraction

大学院理工学研究科

Saitama University

Nihon University

Miho Itoi

Study on pressure induced superconductivity of quasi organic
conductor

医学部

National Institute forMaterials Science

National Institute forMaterials Science

Tohoku Gakuin
University

Kyushu University

National Institute ofIndustrial Science andTechnology

Tokyo Institute ofTechnology

Organization

Yokohama National
University

TakehikoMatsumotoTakashi Naka

Takeshi Kanomata

Tatsuya Kawae

Minoru Otani

Yuichi Okuda

Name

Development of apparatus for specific heat measurements underIzuru Umeharahigh pressure

工学部

The development of the pressure equipment using NiCrAl

物質・材料研究機構

Investigation of magnetic properties for 3d transitionintermetallic compounds under pressure

工学総合研究所
Development of the magnetometer

Development of very Low-temperature spin-polarized STM
with a 3He-4He dilution refrigerator

Molecular dynamics simulations of metal-water interface using
the large scale simulation tool (STATE)

Experimental study of the surface bound state of superfluid
3
He-B

Title

大学院工学研究院

ナノシステム研
究部門

大学院理工学研究科

所属

物質・材料研究機構

東北学院大学

九州大学

産業技術総合研究所

大規模第一原理計算プログラムSTATEを用いた
固液界面の分子動力学シミュレーション

2

大谷 実

東京工業大学

氏名

超流動3He-B相における表面束縛状態の実験的 奥田 雄一
研究

課題名

1

No.

嘱託研究員（Commission Researcher）

平成２４年度 共同利用課題一覧（前期） Joint Research List (2012 First Term)

九州大学

香川大学

14 AgPdCu合金圧力セルを用いた磁場中比熱測定 河江 達也

礒田 誠

藤原 哲也

辺土 正人

巨海 玄道

15 重い電子系物質における圧力下電気抵抗測定

16 Ce化合物の単結晶試料評価とその圧力効果

17 低温マルチアンビル装置の開発

18 磁性体の圧力効果

強磁場量子ビーム科学のためのパルスマグネット
鳴海 康雄
の開発

28

東北大学

高輝度光科学
研究センター

高輝度光科学
研究センター

理学部

金属材料研究所Time resolved photoemission on Mn compounds

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

Design of the new undulator beamline at Spring-8

Design of the new undulator beamline at Spring-8

Design and characterization of brilliance VUV beamline

自然科学研究機構

分子科学研究所

Design and characterization of brilliance VUV beamline

高エネルギー加 物質構造科学
速器研究機構 研究所

Research and development of a new photoelectron spin
detector
Magnetization in process of magnetic nano structure by PEEM

放射光科学研究センター

Design and case study for the high-resolution atoms- andmolecules-spectroscopy beamline at the Super SOR facility

Research and development of soft X-ray undulator beamline

Mario Okawa

Yasuo Narumi

Haruhiko Ohashi

Syunji Goto

Shinichi Kimura

Kanta Ono

Toyohiko Kinoshita

Taichi Okuda

Kenji Ito

Kenta Amemiya

Hiroshi Kondoh

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

高輝度光科学
研究センター

広島大学

大川 万里生 東京理科大学

大橋 治彦

高輝度光源ビームラインにおける分光光学系の
設計・開発

27

29 Mn化合物の時間分解光電子分光

後藤 俊治

高輝度光源ビームラインにおける分光光学系の
設計・開発

木村 真一

25 高輝度極紫外ビームラインの設計・評価

26

小野 寛太

光電子顕微鏡による磁性ナノ構造物質の磁化過木下 豊彦
程24 高輝度極紫外ビームラインの設計・評価

23

奥田 太一

高エネルギー加 物質構造科学
速器研究機構 研究所

高輝度光源計画における直入射ビームラインおよ伊藤 健二
びその利用計画の検討

21

22 光電子スピン検出器の開発・研究

高エネルギー加 物質構造科学
速器研究機構 研究所

雨宮 健太

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

20

理工学部

慶應義塾大学

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

Gendo Oomi

Masato Hedo

Effect of Pressure on the Magnetic Materials

Development of multi-anvil apparatus for low temperature

Effect of Pressure on the Ce Compounds

大学院理工学
研究科
理学部

Makoto Isoda

Effect of Pressure on the Electrical Resistivity of Heavy Fermi
on Compounds

教育学部

Tetsuya Fujiwara

Tatsuya Kawae

Development of pressure cell for specific heat measurements
under magnetic field

大学院工学研究院

Hiroki Takahashi

Name

Adjustment of Cubic Anvil Apparatus

Title

文理学部

所属

19

久留米工業大
学

琉球大学

山口大学

日本大学

氏名

高橋 博樹

課題名

13 多重極限関連装置の調整

No.

Tokyo University of
ScienceTohoku University

Japan Synchrotron
Radiation InstituteJapan Synchrotron
Radiation Institute

Institute for Molecular
ScienceHigh Energy
Accelerator ResearchInstituteJapan Synchrotron
Radiation Institute

Hiroshima University

High Energy
Accelerator ResearchInstituteHigh Energy
Accelerator ResearchInstitute

Keio University

Kurume Institute ofTechnology

University of the
Ryukyus

Yamaguchi University

Kagawa University

Kyushu University

Nihon University

Organization

課題名

竹内 恒博

氏名

自然科学研究機構

60-eVレーザーを用いた時間分解光電子分光の
石坂 香子
開発

藤森 淳

45 高温超伝導体の高分解能光電子分光

46

横谷 尚睦

下志万 貴博 東京大学

42 鉄系超伝導体のレーザー光電子分光

44 高分解能光電子分光による強相関物質の研究

吉田 鉄平

41 鉄ニクタイドの高分解能光電子分光

松波 雅治

金井 要

40 有機化合物の光電子分光

43 ４ｆ電子系物質の高分解能光電子分光

江口 律子

39 酸化バナジウムの高分解能光電子分光

東京大学

東京大学

岡山大学

自然科学研究機構

東京大学

東京理科大学

岡山大学

小野 寛太

38 レーザーPEEMによる磁性体の研究

Ultra-high resolution photoemission spectroscopy on high Tc
superconductor

大学院理学系
研究科

The development of time-resolved photoemission using 60eV
laser

Ultra-high resolution study on strongly correlated materials

大学院自然科
学研究科

大学院工学系
研究科

Photoemission study on 4f materials

分子科学研究所

Laser-ARPES on Fe superconductor

大学院工学系
研究科

Kyoko Ishizaka

Atsushi Fujimori

Takayoshi Yokoya

Masaharu
Matsunami

Takahiro Shimojima

Ultra-high resolution photoemission spectroscopy on Fe-based
Teppei Yoshidasuperconductor

大学院理学系
研究科

Kaname Kanai

Ritsuko Eguchi

Kanta Ono

Yoshinori Onose

Takeshi Nakagawa

Shunsuke Tsuda

Ryuji Tamura

Shinichi Fujimori

Tohru Higuchi

Takayuki Kisu

Photoemission study on organic compounds

Photoemission study on vanadium oxides

Organization

The University ofTokyo

The University ofTokyo

Okayama University

Institute for Molecular
Science

The University ofTokyo

The University of
Tokyo

Tokyo University of
ScienceOkayama University

High Energy
Accelerator ResearchInstitute

The University ofTokyo

Institute for Molecular
ScienceNational Institute forMaterials Science

Tokyo University of
Science

Japan Atomic Energy
AgencyTokyo University of
Science

Osaka University

Tsunehiko Takeuchi Nagoya University

Name

理工学部

大学院自然科
学研究科

Study on magnetism by laser PEEM

Ultra-high resolution photoemission spectroscopy on newstrongly correlated materials

大学院工学系
研究科

高エネルギー加 物質構造科学
速器研究機構 研究所

Observation of magnetic domain structures by ultra-highresolution photoemission electron microscopy

Laser-photoemission study on oxide films

分子科学研究所

物質・材料研究 若手国際研究機構
拠点

小野瀬 佳文 東京大学

超高空間分解能光電子顕微鏡による磁区構造観
中川 剛志
察37 新規開発強相関物質の高分解能光電子分光

36

津田 俊輔

35 レーザー光電子分光による酸化物薄膜の研究

High-resolution photoemission study on quasi crystals

東京理科大学田村 隆治

34 準結晶の高分解能光電子分光

基礎工学部

量子ビーム応用 Ultra high resolution photoemission study on heavy fermion
部門
uranium compounds

日本原子力研究開発機構

Development of resonant inverse photoemission spectroscopy

Research on electron state of molecular crystals using
photoemission spectroscopy

Angle-resolved photoemission study on high Tc cuprate

33 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

大学院基礎工
学研究科

エコトピア科学
研究所

Title

理学部

大阪大学

名古屋大学

所属

東京理科大学樋口 透

光電子分光法を用いた各種分子性結晶の電子状
木須 孝幸
態の研究及び装置の低温化

32 共鳴逆光電子分光装置の開発

31

30 Bi系超伝導体の角度分解光電子分光

No.

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47

大学院理工学
研究科
理学部

東北大学

東北大学

大山 研司

平賀 晴弘

田畑 吉計

松村 武

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

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

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

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

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

中性子分光器を用いた強相関電子系物質の微視桑原 慶太郎 茨城大学
的研究高度化した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

冷中性子スピン干渉計の応用とMINEビームライン
田崎 誠司
の整備

53

54

55

56

57

58

59

60

京都大学

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

63

京都大学

杉山 正明

62 C1-3 ULS極小角散乱装置IRT

富山大学

中野 実

京都大学

茨城大学

広島大学

京都大学

61 膜貫通ペプチドのフリップフロップ誘起能の評価

横山 淳

金属材料研究所

東北大学

中性子散乱装置のアップグレードと共同利用研究
藤田 全基
の推進

52

東北大学

東北大学

中性子４軸回折計FONDERの制御プログラムの改
木村 宏之
良

51

Kenji Ohoyama

Masaki Fujita

Hiroyuki Kimura

Kazuaki Iwasa

原子炉実験所

Masahiro Hino

Masaaki Sugiyama

Development of micro-focusing small-angle neutron scattering
spectrometer
Improvement of MIEZE spectrometer and cold neutronreflectometer and interferometer

Minoru Nakano

Induction of Phospholipid Flip-Flop by Transmembrane
PeptidesSeiji Tasaki

Makoto Yokoyama

Keitaro Kuwahara

Masato Matsuura

大学院医学薬学研究部（薬学）
原子炉実験所

Kyoto University

Tohoku University

Tohoku University

Tohoku University

Tohoku University

Tohoku University

Tohoku University

Hokkaido University

Hokkaido University

Organization

Kyoto University

Kyoto University

University of Toyama

Kyoto University

Ibaraki University

Ibaraki University

Tohoku University

Takeshi Matsumura Hiroshima University

Yoshikazu Tabata

Development of cold neutron spin interferometry andimprovements of MINE beam line

Executing user program and study of material science with theadvanced triple-axis spectrometers

Neutron scattering study of strongly correlated electron
systems by using neutron triple-axis spectrometers

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

Promotion of joint research after the upgrade of neutron
scattering instruments

Progress of the joint research by using the neutron scattering
instruments

Implementation of the research plan under the cooperation-use
Haruhiro Hiraka
program after upgrading neutron scattering instruments

Propelling the inter university research cooperation

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

Updating of control program for four circle neutron
deffractometer FONDER

Structural studies of strongly correlated electron systems byneutron scattering method and instrumental development

Upgrading of neutron diffractometer FONDER and contributing
Yukio Noda
to user collaboration program

Junichi Kaneko

Michihiro Furusaka

Name

大学院工学研究科

大学院先端物質科学研究科

大学院工学研究科

金属材料研究所

金属材料研究所

金属材料研究所

多元物質科学研究所

大学院理学研
究科

東北大学

岩佐 和晃

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

多元物質科学研究所

Upgrade of ULS system

大学院工学研
究科

50

東北大学

Development of a compact focusing small-angle neutron
scattering instrument and application research using the
instrument

Title

大学院工学研
究科

野田 幸男

北海道大学

北海道大学

所属

中性子散乱装置FONDER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

金子 純一

古坂 道弘

氏名

49

48 中性子極小角散乱実験装置のアップグレード

課題名

No.

琉球大学

首都大学東京三軸分光器を用いた極端条件下における物質科
阿曽 尚文
学研究の実施
川端 庸平

伊藤 晋一

糖系界面活性剤水溶液のゲル構造におけるラメ
ラドメイン構造67

68

69 中性子散乱研究計画の実施と共同利用の推進

Study of magnetic properties by time-resolved soft X-ray
spectroscopy

大学院理学研究科

Akio Kimura

Hiroshi Daimon

Akira Sekiyama

大阪大学

Study on heavy Fermion materials by time-resolved
Photoemission

大学院基礎工学研究科

関山 明

エネルギー界面 Study on the electronic property of electrode materials for Li技術グループ ion batteries by soft X-ray absorption/emission spectroscopy

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

79

80 時間分解光電子分光による重い電子系の研究

Daisuke Asakura

数理物質系

超高分解能軟X線発光分光による水素吸蔵合金
関場 大一郎 筑波大学
中の水素の波動関数の局在性に関する研究
産業技術総合研究所

Tokyo Institute ofTechnology

Osaka University

National Institute ofIndustrial Science andTechnology

University of Tsukuba

Hiroshima University

Nara Institute of
Science andTechnology

Kazuyuki Sakamoto Chiba University

Kenichi Ozawa

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

Research and designing of a PEEM spectrometer for highbrilliance soft X ray.

Study of carrier dynamics in photocatalysis materials by timeresolved photoemission spectroscopy

Chiba University

University of the
Ryukyus

RIKEN

High Energy
Accelerator ResearchInstituteTokyo Metropolitan
University

University of the
Ryukyus

Kyushu University

Yamaguchi University

Kyoto University

Organization

High Energy
Hiroshi Kumigashira Accelerator ResearchInstitute

Makoto Nakajima

Yoshitomo Karaki

Yoshie Otake

Shinichi Itoh

Youhei Kawabata

Naofumi Aso

Yoshiaki Takahashi

Tetsuya Fujiwara

Masaaki Kitaguchi

Name

78

広島大学

物質創成科学研究科

奈良先端科学
技術大学院大学

二次元表示型スピン分解光電子エネルギー分析
大門 寛
器の開発

76

木村 昭夫

大学院融合科学研究科

千葉大学

高輝度軟X線を利用する光電子顕微鏡装置の設
坂本 一之
計・開発

75

77 軟X線時間分解分光実験による磁性研究

Development of 2D display type spin resolved photoelectronenergy analyzer.

大学院理工学研究科

東京工業大学

時間分解光電子分光法による光触媒材料のキャ
小澤 健一
リアダイナミクス研究74

Study of electronic states in strongly correlated materials withhigh brilliant soft-Xray

高エネルギー加 物質構造科学
速器研究機構 研究所

高輝度軟X線を利用した強相関物質の電子状態
組頭 広志
研究

Study of spin order control by pulsed terahertz radiation

Ultra low temperature measurements for quantum criticalmaterials

73

理学部

教育学部

千葉大学

琉球大学

Upgrade the instrument of the ultra-precise optics for cold
仁科加速器セン
neutron and research and development of cold neutron
ター
interferometer

Propelling the inter university research cooperation

Lamellar domain structures in the gel structure of a sugar
surfactant solution

テラヘルツパルス電磁波によるスピン秩序の制御
中嶋 誠
の研究

柄木 良友

理化学研究所

大学院理工学
研究科

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

Studies on structural change of soft matter under flow field

先導物質化学研究所
理学部

Neutron scattering experiments under high pressure anddevelopment of high pressure cell for neutron scattering

大学院理工学研究科

Improvement of MIEZE spectrometer and cold neutronreflectometer and interferometer

Title

72

71 量子臨界物質の極低温磁化測定

冷中性子干渉コントラストイメージングならびに超大竹 淑恵
精密光学実験の開発研究

九州大学

66 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

70

山口大学

中性子散乱用高圧セルの開発および高圧下にお藤原 哲也
ける中性子散乱実験

65

原子炉実験所所属

高エネルギー加速器研究機構京都大学

氏名

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

課題名

64

No.

高分解能光電子分光による酸化バナジウムの研
究

81

12

京都大学

擬二次元磁性体Sr2VO4における磁気低温相の解
吉村 一良
明

〃

11

京都大学

京都大学

吉村 一良

一次元フラストレート磁性体におけるネマティック
相間の微視的観測10

首都大学東京大阪市立大学

大阪市立大学

岡山大学

茨城大学

茨城大学

茨城大学

京都大学

東京工業大学東京大学

奈良教育大学

大阪大学

那波 和宏

高津 浩

量子スピン液体Tb2Ti2O7の比熱測定

國松 貴之

石川 修六

町田 一成

伊賀 文俊

9

〃

超流動ヘリウム３-A相の新奇量子渦の研究

78重い電子系超伝導体の対関数対称性の決定

6

〃

4

高圧合成希土類6,12ホウ化物の磁化特性

横山 淳

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

3

5

佐々木 豊

回転超流動ヘリウム３のテクスチャーダイナミクス
の研究

2

中野 優

青木 悠樹

氏名

ずれ振動に対する固体ヘリウム４の応答

課題名

1

No.

中村 元彦

藤原 秀紀

氏名

角度分解光電子分光法による遷移金属酸化物の吉松 公平
表面/界面電子状態の研究

一般研究員（General Researcher）

83

82 鉄シリコンの円２色性光電子分光の研究

課題名

No.

Study of novel quantum vortex of superfluid 3He

大学院理学研究科

大学院理学研究科

大学院理学研究科

大学院理学研究科

大学院理工学研究科

Investigation of a low-temperature magnetic phase in a quasitwo-dimensional magnet Sr 2VO4〃

Microscopic observation of nematic correlation in onedimensional frustrated magnets

Specific heat of the quantum spin liquid of Tb 2Ti2O7〃

Symmetry determination of pairing functions in heavy Fermion
superconductors

大学院自然科
学研究科

大学院理学研究科

Magnetic property of rare earth hexa- and dodeca-borides
produced by high pressure synthesis〃

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

Texture dynamics of Rotating Superfluid 3He

Acoustic shear response of solid Helium 4

Title

Angle-resolved photoemission study of the interfacial states oftransition-metal oxides

Study of circular dichroism of photoemission on FeSi

Study on vanadium oxides by high resolution Photoemission

Title

理学部

大学院理工学
研究科

理学部

低温物質科学
研究センター

大学院総合理
工学研究科

所属

大学院理学系
研究科

理科教育講座大学院基礎工学研究科

所属

Osaka City University

Okayama University

Ibaraki University

Ibaraki University

Ibaraki University

Kyoto University

Tokyo Institute ofTechnology

Organization

The University of
Tokyo

Nara University of
Education

Osaka University

Organization

Kazuyoshi
Yoshimura

Kazuhiro Nawa

Kazuyoshi
Yoshimura

Hiroshi Takatsu

Kyoto University

Kyoto University

Kyoto University

Tokyo Metropolitan
University

Takayuki Kunimatsu Osaka City University

Osamu Ishikawa

Kazushige Machida

Fumitoshi Iga

Suguru Nakano

Makoto Yokoyama

Yutaka Sasaki

Yuki Aoki

Name

Kohei Yoshimatsu

Motohiko Nakamura

Hidenori Fujiwara

Name

29

Dy2Ti2O7のカゴメアイス状態における磁気モノ
ポール
高津 浩

首都大学東京

鹿児島大学

折橋 広樹

28

〃

鹿児島大学

〃

26

27 (MnCo)2Sbの一次磁気相転移の磁場中圧力効果 小山 佳一〃

25

マテリアルサイエンス研究科

北陸先端科学
高村 由起子 技術大学院大学
北陸先端科学ライナー フ
技術大学院大リードライン
学
北陸先端科学
アントワーヌ
技術大学院大フロランス
学

エピタキシャルシリセンの低温走査トンネル顕微
鏡観察

日本放送協会銅表面上ナノ構造における非線形発光の時間分
河村 紀一
解測定

23

24

放送技術研究所

自然科学研究機構

成島 哲也

機械的応力のシリコン表面化学への影響に関する研究22

大学院理工学研究科

大学院理工学研究科

マテリアルサイエンス研究科

Magnetic monopole in the kagome ice state of Dy 2Ti2O7〃

Hiroshi Takatsu

Hiroki Orihashi

Tokyo Metropolitan
University

Kagoshima University

Kagoshima University

Pressure effect on first order magnetic transition of (MnCo) 2Sb Keiichi Koyama

Institute for Molecular
Science

大学院理工学研究科

Tetsuya Narushima

Yasufumi Yamashita Nihon University

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

マテリアルサイエンス研究科

Effect on Silicon Surface Chemistry of External MechanicalStress

Effect of electron correlations in geometrically frustrated
itinerant-electron systems

Kazuhiko Tanaka

Shogo Miyoshi

Shu Yamaguchi

Kazuhiko Tanaka

Shogo Miyoshi

The University ofTokyo

Hosei University

Kyoto University

Organization

NHK Science andTime resolved spectroscopy of harmonics from nano-structures
Norikazu Kawamura Technology Researchon Cu surfaces
Laboratory
Japan Advanced
Low temperature scanning tunneling microscopy investigations
Yukiko Takamura
Institute of Scienceof epitaxial silicene
and Technology
Japan Advanced〃
Rainer Friedlein
Institute of Scienceand Technology
Japan Advanced〃
Antoine Fleurence Institute of Scienceand Technology

分子科学研究
所

工学部

日本大学

〃

大学院工学系
研究科

幾何学的フラストレート遍歴電子系における電子
山下 靖文
相関効果

〃

大学院工学系
研究科

21

〃

20

東京大学

Stress-induced phase transformation of Fe-Zn alloy formed in
hot-dip process〃

大学院工学系
研究科
大学院工学系
研究科〃

Shu Yamaguchi

Kiyoshi Torizuka

Studies on organic molecular conductors by magnetic torquemeasurements
Oxide-Protonics materials synthesis by combined use of soft
chemical method and high pressure

Kazuhiro Nawa

Name

Investigation of a low-temperature magnetic phase in a quasitwo-dimensional magnet Sr 2VO4

Title

大学院工学系
研究科

東京大学

三好 正悟

〃

19

東京大学

東京大学

東京大学

大学院工学系
研究科

理工学部

大学院理学研
究科

所属

田中 和彦

山口 周

田中 和彦

18 溶融亜鉛メッキ合金相の応力誘起変態

〃

17

三好 正悟

東京大学

超高圧プレスを用いた新規プロトニクス酸化物の山口 周
ソフト化学的合成法の検討

〃

法政大学

京都大学

鳥塚 潔

16

15

氏名

擬二次元磁性体Sr2VO4における磁気低温相の解
那波 和宏
明

課題名

14 磁気トルク測定による有機導体の研究

13

No.

課題名

蔵田 裕也

35

道村 真司

37

穴田 泰士

仲村 愛

46

〃

仲間 隆男

45 価数揺動物質の高圧力中輸送特性の研究

〃

44

琉球大学

琉球大学

新潟大学

新潟大学

神戸大学

圧力下強磁場電子スピン共鳴測定のためのハイ
櫻井 敬博
ブリッド圧力セルの開発
中野 智仁

琉球大学

琉球大学

大阪市立大学

大阪市立大学

大学院理工学
研究科

理学部

工学部

工学部

研究基盤センター

大学院理工学
研究科

理学部

大学院理学研究科

大学院理学研究科

量子ビーム応用研究部門

Hidekazu Tanaka

Naofumi Aso

Yuhei Fukumoto

Keizo Murata

Shinji Michimura〃Transport properties of valence fluctuation compounds〃

Transport property of pressure-induced superconductor

Ai Nakamura

Takao Nakama

Taishi Anada

Tomohito Nakano

Development of hybrid pressure cell for high field electron spin
Takahiro Sakurai
resonance measurement under pressure〃

Magnetization studies under pressure in Ce-based magnetic
superconductors with small magnetic moments〃

High Pressure Properties of TTF-TCNQ Analogue〃

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

日本原子力研究開発機構

Fumitoshi Iga〃

大学院理工学
研究科
理学部

Yuya Kurata

Magnetization measurements under high pressures in PrRu 2P2

大学院理工学研究科

Tetsuya Fujiwara

Hironari Okada

Transport properties under high pressure in Pd-based Heusler
alloys

工学部

Yoshiya Adachi

Takeshi Waki

Name

Tomoya Miura

Pressure Dependence of Magnetization for the Ferromagnetic
Shape-Memory Alloys of Ni-Mn-Ga system

Resistivity measurement of Fe 3Mo3N under high pressure

Title

〃

大学院理工学研究科

大学院理工学研究科

大学院工学研
究科

所属

茨城大学

山口大学

山口大学

東北学院大学

山形大学

山形大学

京都大学

田中 秀和

〃

セリウム系磁性超伝導体における微小磁気モーメ
阿曽 尚文
ントの圧力下磁化測定

43 圧力誘起超伝導体の圧力下輸送特性

42

41

40

福本 雄平

39

〃

村田 惠三

38 TTF-TCNQ類縁物質の高圧物性

〃

伊賀 文俊

36 TmB4の磁気準周期秩序相における圧力効果

〃

藤原 哲也

34 PrRu2P2の高圧力下磁化測定

三浦 友也

岡田 宏成

〃

Ni-Mn-Ga系強磁性形状記憶合金の磁化の圧力
安達 義也
依存性

和氣 剛

氏名

33 Pd基ホイスラー合金の高圧下輸送特性

32

31

30 Fe3Mo3Nの高圧下電気抵抗率測定

No.

University of the
Ryukyus

University of the
RyukyusNiigata University

Niigata University

Kobe University

University of the
Ryukyus

University of the
Ryukyus

Osaka City University

Osaka City University

Japan Atomic Energy
AgencyIbaraki University

Yamaguchi University

Yamaguchi University

Tohoku Gakuin
University

Yamagata University

Yamagata University

Kyoto University

Organization

課題名

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

〃

〃

57

58

59

63

62

61

〃

琉球大学

室蘭工業大学

室蘭工業大学

室蘭工業大学

琉球大学

琉球大学

高江洲 義尚 琉球大学

琉球大学

大学院理工学
研究科

理学部

大学院理工学研究科〃

Electrical resistivity under pressure of non-centrosymmetricmagnetic superconductors CeTSi 3 (T=Rh,Ir)〃

Searching for pressure-induced valence transition of noninversion symmetry structure EuTX 3(T=Fe,Co,Ni; X=Ge,Si)〃

大学院工学研究科
理学部〃

大学院工学研究科

Quantum phase transition and magnetism in the strongly
correlated Ce compounds and alloys〃

大学院理工学研究科
大学院工学研究科〃〃

Magnetism and transport properties of rare-earth intermetallic
compounds under high pressure

大学院理工学
研究科

理学部

Yoshinao Takaesu

Naofumi Aso

Sentarou Hirakawa

Masato Hedo

Tsutomu Morioka

Yusuke Amakai

Shigeyuki Murayama

Atsushi Teruya

Masataka Takeda

Kiyoharu Uchima

Takao Nakama

Kazuma Sawami〃

大学院自然科
学研究科

Yuya Imai

Masashi Ohashi〃

大学院理学研究科

Kazuhiko Deguchi

Noriaki Sato

Yuichi Hiranaka

Name

環境デザイン学 Anisotropic magnetovolume effect of rare earth ferromagnet
RAl2
系

〃

High pressure experiments of RTe 3 (R=Ce, Tb) and SmS

Transport properties of valence fluctuation compounds

Title

大学院理学研究科

大学院理学研究科

大学院理工学研究科

所属

沖縄キリスト教短期大学

平川 先太郎 琉球大学

辺土 正人

森岡 敦

雨海 有佑

空間反転対称性のないCeTSi3 (T=Rh,Ir) の圧力
阿曽 尚文
下電気抵抗

〃

空間反転対称性のない EuTX3(T=Fe,Co,Ni;
X=Ge,Si) の圧力誘起価数転移の探索

村山 茂幸

〃

56

60

照屋 淳志

〃

55

竹田 政貴

〃

54

内間 清晴

琉球大学

希土類金属間化合物の高圧下における磁性と輸
仲間 隆男
送特性

53

金沢大学

〃

金沢大学

名古屋大学

澤味 一馬

今井 祐也

名古屋大学

52

〃

50

出口 和彦

名古屋大学

琉球大学

大橋 政司

〃

49

佐藤 憲昭

平仲 裕一

氏名

51 希土類強磁性体RAl2の異方的磁気体積効果

希土類トリテルライドRTe3 (R = Ce,Tb)とSmSの高
圧下物性実験

48

47 価数揺動物質の高圧力中輸送特性の研究

No.

University of the
Ryukyus

University of the
Ryukyus

University of the
Ryukyus

University of the
RyukyusMuroran Institute ofTechnology

Muroran Institute ofTechnology

Muroran Institute ofTechnology

University of the
Ryukyus

University of the
RyukyusOkinawa Christian
Junior College

University of the
RyukyusKanazawa University

Kanazawa University

Nagoya University

Nagoya University

Nagoya University

University of the
Ryukyus

Organization

〃

76

80

窪谷 茂幸

三浦 康弘

余 珊

竹原 陵介

宮川 和也

窒素変調ビームエピタキシー法により作製した窒
小柴 俊化物半導体超格子構造の高分解能X線回折測定

79 高N濃度(In)GaAsN系混晶薄膜の構造解析 (3)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

77 鉄系超伝導体関連物質の圧力効果

〃

78

飯久保 智

九州工業大学〃

大学院工学系
研究科

香川大学

東京大学

桐蔭横浜大学High Resolution XRD Studies of Nitride Semiconductor
Superlattices by Modulated Nitrogen Beam Epitaxy

Structural analysis of higher-N-content (In)GaAsN films (3)大学院新領域
創成科学研究科
工学部

Studies on Electrical Properties of Conductive LangmuirBlodgett Films under High Pressure

大学院工学研
究科

Pressure effects of Fe-based superconductor related materials〃

Resistivity measurement of neutral-ionic phase transitionmaterials under extreme high pressure

Pressure Effect on Magnetic Ordering in Mn 3ZnN〃

Transport properties under high pressure on large cage
structure CeRuGe 3〃

Magnetic transition of polymorphic compounds RIn 2Si2〃

Magnetization measurements under high pressures in new
heavy fermion system Ce 2Pt3Ge5〃

Magnetic properties under pressure of filled-type compound

Searching for pressure-induced valence transition of noninversion symmetry structure EuTX 3(T=Fe,Co,Ni; X=Ge,Si)

Title

大学院工学系
研究科

大学院工学系
研究科

大学院生命体
工学研究科

大学院理工学
研究科

理学部

大学院理工学研究科

大学院理工学研究科

大学院理工学研究科

大学院理工学
研究科

大学院自然科
学研究科

工学部

大学院理工学研究科

所属

物質・材料研究 超伝導物性ユ
機構
ニット

東京大学

東京大学

中性-イオン性転移物質の超高圧下電気伝導度
鹿野田 一司 東京大学
測定

75

74

73 逐次転移を示すMn3ZnNの圧力効果〃

渡部 晋太郎 琉球大学

琉球大学

71 大きな籠状構造を持つCeRuGe3の高圧輸送特性 辺土 正人

72

山口大学

大河原 遊

〃

70

山口大学

繁岡 透

〃

69 多形性化合物RIn2Si2の磁気転移

68

長谷川 貴大 山口大学

山口大学

重い電子系新物質Ce2Pt3Ge5の高圧力下磁化測
藤原 哲也
定

67

新潟大学

青山 悠司

〃

新潟大学

琉球大学

66

田中 秀和

氏名

中野 智仁

空間反転対称性のない EuTX3(T=Fe,Co,Ni;
X=Ge,Si) の圧力誘起価数転移の探索課題名

65 充填型物質の作成と圧力下物性

64

No.

Shyun Koshiba

Shigeyuki Kuboya

Yasuhiro Miura

Yu ShanRyosuke Takehara

Kazuya Miyagawa

Kazushi Kanoda

Satoshi Iikubo

Shintarou Watanabe

Masato Hedo

Yu Okawara

Toru Shigeoka

Takahiro Hasegawa

Tetsuya Fujiwara

Yuji Aoyama

Nakano Tomohito

Hidekazu Tanaka

Name

Kagawa University

The University ofTokyo

Toin University of
Yokohama

National Institute forMaterials Science

The University ofTokyo

The University ofTokyo

The University ofTokyo

Kyushu Institute ofTechnology

University of the
Ryukyus

University of the
Ryukyus

Yamaguchi University

Yamaguchi University

Yamaguchi University

Yamaguchi University

Niigata University

Niigata University

University of the
Ryukyus

Organization

角田 雅弘97

大型プレスを用いた新規遷移金属炭化物の高圧
丹羽 健
合成

96 正20面体希土類クラスターの磁気物性

廣戸 孝信

江口 遼

95

〃

長谷川 正

94 新規アルカリ土類金属間化合物の超高圧合成

名古屋大学

東京理科大学

名古屋大学

名古屋大学

室蘭工業大学

川田 友和

93

〃

室蘭工業大学

名古屋大学

名古屋大学

埼玉大学

埼玉大学

埼玉大学

92 カゴ状構造を持つ新奇希土類プニクタイドの探索 関根 ちひろ

能丸 大器

〃

91

吉田 直史

草場 啓治

〃

89

高宮 健吾

90 Mg2Siの高圧合成〃

窒素デルタドープGaAs中の等電子トラップからの
矢口 裕之
単一光子発生に関する研究松本 翔太郎 香川大学

香川大学

希薄磁性半導体GaGdAsの光学特性・光スピンダ
宮川 勇人
イナミクスに及ぼす成長条件・Gd濃度の影響

〃

香川大学

香川大学

東京大学

香川大学

稲田 雅俊

〃

RF-MBE法を用いた窒化物半導体超格子構造の小柴 俊
電気特性評価

88

87

86

85

84

83

氏名

窒素変調ビームエピタキシー法により作製した窒矢内 俊輔
化物半導体超格子構造の高分解能X線回折測定

課題名

82 立方晶窒化物半導体の結晶成長と評価

81

No.

High-pressure synthesis of Mg 2Si〃

大学院工学研究科
大学院工学研究科

大学院工学研究科

大学院基礎工
学研究科

大学院工学研究科

大学院工学研究科

大学院工学研究科

Kagawa University

Kagawa University

Kagawa University

The University of
Tokyo

Kagawa University

Organization

Takanobu Hiroto

Ryo Eguchi

Masashi Hasegawa

Tomokazu Kawata

Chihiro Sekine

Taiki Noumaru

Keiji Kusaba

Naofumi Yoshida

Kengo Takamiya

Hiroyuki Yaguchi

Nagoya University

Tokyo University of
Science

Nagoya University

Nagoya University

Muroran Institute ofTechnology

Muroran Institute ofTechnology

Nagoya University

Nagoya University

Saitama University

Saitama University

Saitama University

Shotaro Matsumoto Kagawa University

Hayato Miyagawa

Masatoshi Inada

High pressure synthesis of novel transition metal carbides using
Ken Niwa
large volume press

Magnetic properties of intermetalic compounds made of
icosahedral rare-earth clusters〃

High pressure synthesis of novel alkaline earth metalintermetallic compounds〃

Search for new rare-earth pnictides with cage-like structure〃

大学院理工学研究科

大学院工学研究科〃

Single photon generation from isoelectronic traps is nitrogendelta-doped GaAs〃

Growth Condition Effect on Optical Properties and Opto-spin
Dynamics of Diluted Magnetic Semiconductor GaGdAs

大学院理工学研究科

大学院理工学研究科

大学院工学研究科

工学部

大学院工学研究科〃

Shyun Koshiba

Electric characteristic of nitride semiconductor superlatticegrown by radio frequency molecular beam epitaxy using
modulated N radical beam method

工学部

Masahiro Kakuda

Crystal growth and characterization of cubic nitride
semiconductor

大学院新領域
創成科学研究科

Syunsuke Yanai

NameHigh Resolution XRD Studies of Nitride Semiconductor
Superlattices by Modulated Nitrogen Beam Epitaxy

Title

大学院工学研
究科

所属

氏名

〃

102

原田 健自

エンタングルメント繰り込みを用いた量子三角格子モデルの変分法

105

大河原 遊

109

蔵田 裕也

111

114

谷口 智洋

113

近藤半導体YbB12 のワンターンコイルによる100T
伊賀 文俊
パルス磁場下での強磁場磁化過程

〃

門脇 広明

112 Tb2Ti2O7における量子スピン液体状態の研究

〃

藤原 哲也

110 LaRu2P2の上部臨界磁場の圧力効果

〃

繁岡 透

ヒ素の化学結合制の形成・切断を利用した電子物
野原 実
性開拓

108 (Ho,Gd)Rh2Si2 単結晶の磁気転移Ⅱ

107

京都大学

九州大学

九州大学

茨城大学

首都大学東京首都大学東京

山口大学

山口大学

山口大学

山口大学

岡山大学

多羅間 充輔 京都大学

眞鍋 栄樹

〃

104

106 細胞の自己推進機構の理論的解析

光田 暁弘

103 六方晶Eu化合物の低温粉末X線回折

京都大学

京都大学

ギヨーム ブ
イー

〃

101

中野 晃佑

京都大学

矢島 健

〃

100

京都大学

名古屋大学

小林 洋治

大型プレスを用いた新規遷移金属炭化物の高圧
野引 浩介
合成

課題名

99 低温合成による層状酸砒化物の構造物性

98

No.

Powder X-ray diffraction at low temperatures of hexagonal Eu
compounds

大学院理学研究院〃

大学院理工学
研究科

High field magnetization of Kondo insulator YbB 12 by using
one-turn coil in a 100T pulse magnet

Quantum spin liquid in Tb 2Ti2O7

大学院理工学
研究科

理学部〃

Pressure effect on the upper critical field of LaRu 2P2

大学院理工学研究科

大学院理工学研究科〃

Magnetic transitions of (Ho,Gd)Rh 2Si2 single crystal Ⅱ

大学院理工学研究科
大学院理工学
研究科

Exploration of novel electronic states out of the arsenic bondmaking and breaking in solid

Theoretical analysis of the mechanism of cellular spontaneous
propulsion

大学院理学研
究科
大学院自然科
学研究科

Variational method based on an entanglement renormalization
for quantum triangular lattice models

大学院情報学研究科〃〃

大学院工学研究科

大学院理学府〃〃大学院工学研究科

大学院工学研究科

Fumitoshi Iga

Tomohiro Taniguchi

Hiroaki Kadowaki

Yuya Kurata

Tetsuya Fujiwara

Yu Okawara

Toru Shigeoka

Minoru Nohara

Mitsusuke Tarama

Kenji Harada

Shigeki Manabe

Akihiro Mitsuda

Kousuke Nakano

Guillaume Bouilly

Takeshi Yajima

Yoji Kobayashi

Structural properties of layered oxide-pnictide via lowtemperature synthesis

大学院工学研究科

NameHigh pressure synthesis of novel transition metal carbides using
Kosuke Nobiki
large volume press

Title

大学院工学研究科所属

Ibaraki University

Tokyo Metropolitan
University

Tokyo Metropolitan
University

Yamaguchi University

Yamaguchi University

Yamaguchi University

Yamaguchi University

Okayama University

Kyoto University

Kyoto University

Kyushu University

Kyushu University

Kyoto University

Kyoto University

Kyoto University

Kyoto University

Nagoya University

Organization

佐藤 桂輔131 幾何学的フラストレート磁性体の磁化研究

菊池 彦光

福井大学

静岡大学

中井 裕人

〃

130

大学院工学研究科

大学院理学研究科

理学部

Magnetization of the geometrically frustrated magnets〃

Hikomitsu Kikuchi

Hirohito Nakai

Takao Ebihara

Physical phenomena at high magnetic fields in rear earth
intermetallic compounds

Masato Goto

Hideaki Kitazawa〃

大学院理学研究科

Hiroaki Ueda

Masakazu Ito

Study of Kondo state in rare-earth clathrate compounds
Ce3Pd20(Si1-xGex)6

Magnetism of transition-metal fluorides with frustrated lattices

Specific heat of Heusler compounds with spin glass undermagnetic field

Hiroaki Fukui

Takayuki Asano

Magnetic Ordering and Magnetization Process in the Chromic
Compound CoMoO 4〃

Daisuke Furusawa

Takeshi Waki

Masaki Imai〃High field magnetization measurement of η-carbide-type
compounds

大学院理学研究科

大学院理工学研究科

大学院理学府大学院理学研究院

大学院工学研究科

大学院工学研究科〃

大学院理学研究科

Shintaro Kobayashi

Chishiro Michioka

Physical properties in the vicinity of itinerant ferromagnetic
quantum critical point in SrCo 2P2 and its family compounds〃

Keisuke Sato

Takahiro Hasegawa

Toru Shigeoka

Name

High-Field Induced Spin State Transition in Co perovskite〃

High field magnetization of DyPd2Ge2 single crystal

Title

大学院理学研究科

大学院理学研究科

大学院理工学研究科

大学院理工学研究科

所属

物質・材料研究 量子ビームユ
機構
ニット

京都大学

海老原 孝雄 静岡大学

希土類カゴ状化合物Ce3Pd20(Si1-xGex)6の近藤状
北澤 英明
態に関する研究後藤 真人

129 希土類金属間化合物の強磁場物性研究

128

〃

京都大学

フラストレートした格子をもつ遷移金属フッ化物の
植田 浩明
磁性

126

127

鹿児島大学

九州大学

スピングラスを持つホイスラー化合物の磁場中比
伊藤 昌和
熱

〃

125

124

福井 博章

九州大学

クロミック化合物モリブデン酸コバルトの磁気相転浅野 貴行
移と強磁場磁化過程

123

京都大学

古澤 大介

〃

京都大学

京都大学

122

今井 正樹

和氣 剛

〃

120

小林 慎太郎 京都大学

京都大学

茨城工業高等専門学校

121 η-カーバイド型化合物の強磁場磁化測定〃

SrCo2P2とその周辺化合物における遍歴電子強磁
道岡 千城
性量子臨界点近傍の物性

119

118

117 LaCoO3系の強磁場誘起スピン転移の研究〃

長谷川 貴大 山口大学

山口大学

116

氏名

繁岡 透

課題名

115 DyPd2Ge2単結晶の強磁場磁化

No.

University of Fukui

Shizuoka University

Shizuoka University

National Institute forMaterials Science

Kyoto University

Kyoto university

Kagoshima University

Kyushu University

Kyushu University

Kyoto University

Kyoto University

Kyoto University

Kyoto University

Kyoto University

Ibaraki National
College of Technology

Yamaguchi University

Yamaguchi University

Organization

吉原 義浩

136

高橋 康輔

138

田中 佑季

140

香取 浩子

太田 寛人

安藤 悠一

松平 和之

黒江 晴彦

有馬 孝尚

142 スピネル酸化物の強磁場下での振る舞い〃〃

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

〃

144

145

146 パルス強磁場中のCu3Mo2O9の磁化・分極測定

メタホウ酸銅における電気磁気効果の磁場方位
依存性

143

147

148

阿部 伸行

奥田 哲治

141 強磁場下での遷移金属酸化物の熱電特性評価

〃

池田 修悟

139 単結晶EuNiIn4における高磁場磁化

〃

稲田 貢

137 金属ナノクラスター集合体の磁気抵抗測定

〃

稲田 貢

伊賀 文俊

近藤半導体YbB12の100T級ロングパルス磁場下での強磁場物性134

135 金属ナノクラスターの磁化測定

中田 隼人

〃

133

氏名

藤井 裕

課題名

132 幾何学的フラストレート磁性体の磁化研究

No.

東京大学

東京大学

上智大学

九州工業大学

東京農工大学

東京農工大学

東京農工大学

鹿児島大学

兵庫県立大学

兵庫県立大学

関西大学

関西大学

関西大学

関西大学

茨城大学

福井大学

福井大学

Magnetic properties of spinel oxides in high magnetic fields

大学院工学研究院

Yuichi Ando

Hiroto Ohta

Hiroko Katori

Tetsuji Okuda

Yuki Tanaka

Shugo Ikeda

Tokyo University ofAgriculture andTechnology
Tokyo University ofAgriculture andTechnology
Tokyo university ofagriculture andtechnology

Kagoshima University

University of Hyogo

University of Hyogo

Kansai University

Dependence of electric polarization in copper metaborate on
magnetic field direction

大学院新領域
創成科学研究科
大学院新領域
創成科学研究科〃

Magnetization and electric polarization measurements in
Cu3Mo2O9 under strong pulsed magnetic fieldNobuyuki Abe

Taka-hisa Arima

Haruhiko Kuroe

The University ofTokyo

The University ofTokyo

Sophia University

Transport and Magnetic Properties of Pyrochlore Iridates under
Kyushu Institute of
Kazuyuki MatsuhiraHigh Field Magnetic Field
Technology

〃

理工学部

大学院工学研究院

大学院工学府〃Measurements of thermoelectric properties of transition metaloxides in a high magnetic field

大学院理工学研究科

工学部〃

High-field magnetization in EuNiIn4 single crystals

大学院物質理学研究科

大学院物質理学研究科

Kousuke Takahashi

大学院理工学研究科〃

Mitsuru Inada

システム理工学 Electronic transport properties of metal clusters under high部
magnetic fieldKansai University

Yoshihiro Yoshihara Kansai University〃

Kansai University

Ibaraki University

大学院理工学
研究科

Fumitoshi Iga

Mitsuru Inada

High field physical property of Kondo insulator YbB 12 up to
100T class in a long pulse magnet

University of Fukui

University of Fukui

Organization

システム理工学 Magnetic properties of metal nano-clusters under high部
magnetic field

理学部

Hayato Nakata〃

大学院工学研究科

Name

Yutaka Fujii

Title

遠赤外領域開Magnetization of the geometrically frustrated magnets
発研究センター

所属

〃

155

山田 浩平

SiC (000-1)上のエピタキシャル酸化シリコン超薄栃原 浩
膜の高分解能STM/STS測定〃

キャリアドープボロンクラスター物質の作製と陽電金沢 育三
子ビーム法による分析

齋藤 誠

金沢 育三

165

164

冨田 崇弘

〃

岩瀬 賢治

フェルダジルラジカルを用いた新規磁性体の低温
山口 博則
磁気状態

163 重い電子系Yb化合物の量子臨界と価数揺動〃

大阪府立大学

大阪府立大学

日本大学

九州大学

162

佐藤 由昌

九州大学

3

161 重い電子系物質における He温度領域での磁化 河江 達也
測定

160

日本大学

東京工業大学

九州大学

東京学芸大学

東京学芸大学

多重安定性を示す光誘起分子磁性体のサイズ効
糸井 充穂
果の研究

159 微傾斜SiC表面に成長したグラフェンの電子物性 中辻 寛

158

157

156

東京学芸大学

Al系準結晶及び近似結晶中の構造欠陥の陽電子ビーム法による分析

154

東京学芸大学

物質・材料研究 環境・エネル
機構
ギー材料部門マルチフェロイック薄膜の焦電流検出による電気木村 秀夫
磁気結合評価153

Makoto Saito

Ikuzo Kanazawa

Hideo Kimura

Masato Matsuura

Hiroshi Yaguchi

Xiao XU

Wataru Ito

Name

Low-temperature magnetic state of new material with verdazyl
radicals〃

大学院理学系
研究科

valence fluctuation and Quantum Criticality in Heavy Fermion
System Yb compound
大学院理学系
研究科

文理学部

Kenji Iwase

Hironori Yamaguchi

Takahiro Tomita

Yoshiaki Sato

Tatsuya Kawae

Magnetization measurements in 3He temperature region forheavy fermion systems

大学院工学研究院〃

Miho Itoi

Size effect on photo-switchable molecular magnet
K0.3Co[Fe(CN)6]0.77・3.4H2O

医学部

大学院工学府Kan Nakatsuji

Electronic structure of graphene grown on a vicinal SiC
substrate

大学院総合理工学研究科

Hiroshi Tochihara

Kouhei Yamada

High-resolution STM and STS measurements of silicon-oxide
ultrathin films formed epitaxially on the SiC(000-1) surface〃

Preparing of carrier-doped Boron clusters and analysis by slow
Ikuzo Kanazawa
positron beam〃

Analysis of structural diffects in Al based icosahedral
quasicrystals and approximate crystals by slow positron beam

Evaluation of magneto-electric coupling on multiferroic thinfilms by pyroelectric current

Study of spin fluctuations in the pseudogap phase of high-Tc
cuprate LSCO

Study of the Magnetic-Field Induced Density-Wave Phase inGraphite Using Non-Destructive Pulsed Magnetic Fields〃

Observation and clarification of the origin of anomalous
behaviors at low temperature under strong magnetic field in
NiMn based and FeMn based alloys

Title

大学院総合理工学研究院

大学院教育学
研究科

自然科学系

大学院教育学研究科

自然科学系

金属材料研究
所

東北大学

松浦 直人

銅酸化物高温超伝導体LSCO擬ギャップ相における磁気励起スペクトラムの研究

理工学部

大学院工学研
究科

152

東北大学

許 皛（キョ
キョウ）
東京理科大学〃150

仙台高等専門
学校

伊東 航

所属

非破壊パルス強磁場を用いたグラファイトの磁場
矢口 宏
誘起密度波相の研究

超強磁場を利用したNiMn基およびFeMn基合金の低温異常現象の観察および起源解明

149

氏名

151

課題名

No.

Osaka Prefecture
University

Osaka Prefecture
University

Nihon University

Kyushu University

Kyushu University

Nihon University

Tokyo Institute ofTechnology

Kyushu University

Tokyo Gakugei
University

Tokyo Gakugei
University

Tokyo Gakugei
University

Tokyo Gakugei
University

National Institute forMaterials Science

Tohoku University

Tokyo University of
ScienceTohoku University

Sendai National
College of Technology

Organization

氏名

東京理科大学

清川 貴和

内藤 智之

〃

Pr-Ca-Co-O系の強磁場下における金属・絶縁体－スピン状態転移

マルチフェロイック(Sr0.5Ba0.5)MnO3の強磁場下に鈴木 健士
おける磁性-強誘電性結合

表面プラズモンを支持する金属単結晶表面の作
成と解析

〃

170

171

172

173

174

一次元パイエルス絶縁体の時間分解テラヘルツ
分光

〃

〃

〃

176

177

178

179

182

内田 翔也

181

LEED I-V 法による Cu(001) 上のアラニン吸着表
岩井 秀和
面の構造解析

〃稲垣 祐次

180 パルス強磁場下における比熱測定技術の開発

大島 拓也

南 康夫

片山 郁文

武田 淳

電荷注入された低次元量子スピン系の結晶育成
横尾 哲也
とその評価

175

友部 弥

渡辺 量朗

理化学研究所山田 重樹

169 FeTiO3の誘電性と磁性

理学部

大学院理学系
研究科

所属

大学院総合化
学研究科

大学院総合化学研究科

交差相関物質研究チーム

工学部

大学院生命ナノシステム科学研
究科

国際総合科学
部

宇都宮大学

九州大学

九州大学

横浜国立大学横浜国立大学横浜国立大学横浜国立大学

大学院工学研究科

大学院工学府LEED-IV structure analysis of alanine on Cu(001) surface〃

Specific heat measurements under pulsed high magnetic field〃〃

Time-resolved THz spectroscopy for one-dimensional Peierls
insulators

大学院工学研究院

大学院工学研究院

Wataru Tomobe

Hidekazu Iwai

Shoya Uchida

Yuji Inagaki

Takuya Ohshima

Yasuo Minami

Ikufumi Katayama

Jun Takeda

Single crystal growth and physical properties of charge induced
Tetsuya Yokoo
low dimensional quantum spin systems〃

Kazuo Watanabe

Takehito Suzuki

Coupling between magnetism and ferroelectricity at highmagnetic field for mutiferroic (Sr 0.5Ba0.5)MnO3
Fabrication and analysis of single crystal metal surfaces
supporting surface plasmons

Tomoyuki Naito

Takayasu Kiyokawa

Shigeki Yamada

Metal-insulator and spin-state transition in Pr-Ca-Co-O
system under high magnetic fields〃

Dielectric and Magnetic Properties of FeTiO 3〃

大学院工学府Izumi Iwasa

Naoki Amaya

Name

Pulsed-field quantum oscillation measurements on iron-pnictide
Taichi Terashima
superconductors

Acoustic shear response of solid Helium 4

Low-temperature magnetic state of new material with verdazyl
radicals

Title

大学院工学研究院

大学院工学研究院

高エネルギー加 物質構造科学
速器研究機構 研究所

東京理科大学

岩手大学

横浜市立大学

横浜市立大学

物質・材料研究 超伝導物性ユ
機構
ニット

寺嶋 太一

168 鉄系超伝導体のパルス磁場下量子振動計測

神奈川大学

大阪府立大学

岩佐 泉

フェルダジルラジカルを用いた新規磁性体の低温
天谷 直樹
磁気状態

課題名

167 ずれ振動に対する固体ヘリウム４の応答

166

No.

Utsunomiya University

Kyushu University

Kyushu University

Yokohama National
University

Yokohama National
University

Yokohama National
University

Yokohama National
University

High Energy
Accelerator ResearchInstituteTokyo University of
ScienceTokyo University of
Science

RIKEN

Iwate University

Yokohama City
University

Yokohama City
University

National Institute forMaterials Science

Kanagawa University

Osaka Prefecture
University

Organization

〃

195

大阪府立大学〃198

199 量子ホール効果試料の作成

CeRu2Al10における超高圧下反強磁性消失点近傍のバルク測定

197

澤田 安樹

栗原 弘光

京都大学

高知大学

北川 健太郎 高知大学

豊田工業大学細越 裕子

有機ビラジカルによる低次元量子磁性体の強磁
場磁化測定

194

東京理科大学196 GaAsNの電子輸送特性およびバンド構造の解明 稲垣 充

安藤 正海

角度分析板厚と空間解像度に関する理論・実験
研究

193

埼玉大学

大阪府立大学

吉田 透

〃

192

埼玉大学

岩手大学

岩下 健

片野 進

空間反転対称性を欠いた系 CeNiC2の圧力下での磁気秩序と超伝導

191

低温物質科学
研究センター

大学院総合人間自然科学研究科

Sample Preparation for Quantum Hall Effect〃

Bulk experiments around the antiferromagnetism vanishingpoint of CeRu2Al10 under ultrahigh pressures

Clarification of electron transport property and band structureof GaAsN

大学院工学研究科
教育研究部〃

Magnetization measurements of organic biradical crystals inhigh magnetic fields

Theoretical and Experimental Study on Relation between Laue
Angle Analyzer and Spatial Resolution〃

Magnetic ordering and superconductivity of the noncentrosymmetric system CeNiC 2 under high pressure

大学院理学系
研究科

大学院理学系
研究科

総合研究機構大学院理工学研究科

大学院理工学研究科〃

大学院工学研
究科

坂野 幸平

〃

190

〃

大学院工学研究科

シャラムジャン
岩手大学
スマイ

〃

189

Ultrasonic measurements of strongly correlated systems inpulsed magnetic field

吉澤 正人

188 強相関伝導系のパルス磁場中の超音波測定

東北大学
大学院工学研究科〃

岩手大学

大学院工学府Photoemission study of organic thin film growth process on
silicon surfaces

Development of high-quality, single-crystal neutron
monochromator横浜国立大学

大学院工学研究院

Tohoku University

Yokohama National
University

Yokohama National
University

Yokohama National
University

Kyushu Institute ofTechnology

Organization

Anju Sawada

Hiromitsu Kurihara

Kentaro Kitagawa

Makoto Inagaki

Ken Iwashita

Yuko Hosokoshi

Masami Ando

Toru Yoshida

Susumu Katano

Kouhei Sakano

Kyoto University

Kochi University

Kochi University

Toyota Technological
Institute

Osaka Prefecture
University

Osaka Prefecture
University

Tokyo University of
Science

Saitama University

Saitama University

Iwate University

Shalamujiang Simayi Iwate University

Masahito Yoshizawa Iwate University

Haruhiro Hiraka

Kenta Hiraga

Shinya Ohno

Shinya Ohno

Photoemission study of silicide of magnetic metals

大学院工学研究院

NameTransport and Magnetic Properties of Pyrochlore Iridates under
Yuto MizutoriHigh Field Magnetic Field

Title

大学院工学府所属

金属材料研究
所

平賀 健太

平賀 晴弘

〃

横浜国立大学

シリコン表面上の有機薄膜成長過程の光電子分
大野 真也
光187 高品質単結晶中性子モノクロメータの開発

186

185

九州工業大学横浜国立大学

水鳥 雄斗

氏名

大野 真也

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

183

184 磁性金属シリサイドの光電子分光

課題名

No.

〃

田端 千紘

北海道大学

大学院理学院

大学院理学研究院

大学院理学研究科

大学院理学研
究科

所属

〃

4

加藤 暢

中山 則昭

〃

強相関系遷移金属酸化物の透過電子顕微鏡法
による研究

10

11

山口大学

東京大学

東京大学

大学院理工学研究科

TEM study of strongly correlated transition metal oxidesystems〃

Noriaki Nakayama

Toru KatoSven Stauss

Yuya Haraguchi

Shintaro Kobayashi

Hiroaki Ueda

Ryuta Yoshii

Investigation of the reaction mechanisms of diamondoid
synthesis by pulsed laser plasmas generated in supercriticalfluids by time-resolved spectroscopy
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科

時間分解分光法を用いた超臨界流体中パルス
シュタウス ス
レーザープラズマによるダイヤモンドイド合成におヴェンける反応メカニズムの探索

9

Kyoto University

Kyoto University

Organization

Hokkaido University

Hokkaido University

Nagoya University

Kobe University

Organization

Yamaguchi University

The University ofTokyo

The University ofTokyo

Yamaguchi University

Kyoto University

Kyoto University

Kyoto University

Kyoto University

Takafumi Yamamoto Kyoto University

Cedric Tassel

Hiroshi Kageyama

Name

Chihiro Tabata

Mariko Nagashima

大学院理工学研究科

低結晶性クリノゾイサイトの非晶質特性の実態と原永嶌 真理子 山口大学
因の解明

8

原口 祐哉

Shuya Matsukawa

Properties of low crystallinity clinozoisite

〃

〃

7

小林 慎太郎 京都大学
大学院理学研
究科

〃

6

京都大学

京都大学

〃

植田 浩明

京都大学

Characterization of novel frustrated magnets〃

大学院工学研
究科

吉井 龍太
大学院理学研究科〃

京都大学

大学院工学研
究科

山本 隆文

〃

大学院工学研究科

セドリック タッ京都大学
セル

大学院理学研究科

新規フラストレート磁性体の物性評価

〃

3

5

〃

Structural Transition in Ruddlesden-Popper Type Perovskite

Title

〃

大学院工学研
究科

所属

Name

Polarization-Microscope Study on Domain Structure of Hidden
Hiroshi Amitsuka
Order in URu2Si2

High pressure experiments of RTe 3 (R=Ce, Tb) and SmS

京都大学

氏名

Ruddlesden-Popper型ペロブスカイトにおける構造
陰山 洋
相転移

課題名

2

1

No.

Title
Development of hybrid pressure cell for high field electron spin
Kohdai Fujimoto
resonance measurement under pressure

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

203

偏光顕微鏡によるURu2Si2の隠れた秩序相におけ網塚 浩るドメイン構造の観察

202

北海道大学

名古屋大学

希土類トリテルライドRTe3 (R = Ce,Tb)とSmSの高
圧下物性実験

201

松川 周矢

神戸大学

氏名

圧力下強磁場電子スピン共鳴測定のためのハイ藤本 皓大
ブリッド圧力セルの開発

課題名

200

No.

パイロクロア型希土類酸化物の単結晶育成と磁気
松平 和之
フラストレーションの研究

13

九州工業大学

山口大学
大学院工学研究院

大学院理工学
研究科

所属

氏名

佐野 恵二

東京大学

〃

〃

13

植松 大介

佐賀山 基

東京大学

東京大学

東京大学

生駒 健太郎 東京大学

幾何学的フラストレーションと強相関に基づく物性
阿部 伸行
開拓

12

11

〃

高温高圧水を利用した有機修飾微粒子の連続合大友 順一郎 東京大学
成技術の開発910

大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科

カーボンナイトライドマテリアルの開発とキャラクタ
佐々木 岳彦 東京大学
リゼーション

光田 暁弘

8

東京大学
大学院理学研
究院

松本 祐太

九州大学

〃

6

大友 順一郎 東京大学

東京大学

低温下における単結晶YbPdの構造解析

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

5

秋月 信

大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科

所属

7〃

高温高圧水中における固体酸塩基触媒反応の速大友 順一郎 東京大学
度論的解析

〃

高温高圧水中における固体塩基触媒反応の速度
大友 順一郎 東京大学
論的解析

課題名

4

3

2

1

No.

Title

Yuta Matsumoto

Junichiro Otomo

Makoto Akizuki

Junichiro Otomo

Keiji Sano

Junichiro Otomo

Name

Kazuyuki Matsuhira

Yoshihiro Teraura

Name

〃

〃

Research of strongly correlated electron systems withgeometrical frustration〃

The development of continuous synthesis of organic-modified
particles in high temperature and pressure water

Development and characterization of carbon-nitiride materials

Daisuke Uematsu

Hajime Sagayama

Nobuyuki Abe

Kentaro Ikoma

Junichiro Otomo

Takehiko Sasaki

Structural analysis of single crystal of YbPd at low temperatures Akihiro Mitsuda〃

Material recycling from organic-inorganic composite waste
using supercritical water〃

Kinetic analysis of solid acid and base catalyzed reactions in
sub- and supercritical water〃

Kinetic analysis of solid base catalyzed reactions in sub- andsupercritical water

Title

Single crystal growth and study of frustrated magnetism inpyrochlore rare-earth oxides

TEM study of strongly correlated transition metal oxidesystems

物質合成・評価設備Gクラス（Materials Synthesis and Characterization G Class Researcher）

寺浦 佳宏

強相関系遷移金属酸化物の透過電子顕微鏡法
による研究

12

氏名

課題名

No.

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

Kyushu University

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

Organization

Kyushu Institute ofTechnology

Yamaguchi University

Organization

佐賀山 基

幾何学的フラストレーションを有する強相関電子
系物質の電子状態の評価

15

東京大学

東京大学

〃

プロトン伝導性電解質を用いた中温作動燃料電
池の開発

〃

19

20

21

超臨界水を用いたシリコンスラッジからのシリコン
の回収

〃

24

25

嶋田 五百里 東京大学〃

マイクロ・ナノスプリングのモルフォロジーの観察及び微細構造の解析

30 シリサイド系半導体単結晶の光学特性評価

29

東京大学

横 哲

東京大学

大友 順一郎 東京大学

高坂 文彦

大石 淳矢

鵜殿 治彦

陳 秀琴

28 TiNマイクロ・ナノスプリングの成長パータンの観察 楊 少明

27

東京大学

大友 順一郎 東京大学

川村 亮人

茨城大学

東京理科大学

東京理科大学

東京大学

微量成分に着目したSOFCの発電性能及び製造
大友 順一郎 東京大学
プロセスの評価

〃

23

26

東京大学

大友 順一郎 東京大学

山本 高史

リン酸リチウムガラスセラミックスの合成とリチウムイ
大友 順一郎 東京大学
オン伝導特性評価

プロトン伝導性中温作動燃料電池電解質および空気極の研究

18

22

〃

17

IT-SOFCならびに金属空気電池のためのセリア
16 系高酸化物イオン伝導性電解質の作製と特性評 大友 順一郎 東京大学
価

有馬 孝尚

幾何学的フラストレーションを有する強相関電子
系の設計

14

氏名

課題名

No.

工学部

理工学部

理工学部

大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科所属
Name

Iori Shimada

Junichiro Otomo

Xiuqin Chen

Haruhiko Udono

Characterizations of optical properties single crystalline
semiconducting silicides

Shaoming Yang

Junya Oishi

Junichiro Otomo

Akira Yoko

Junichiro Otomo

Fumihiko Kosaka

Observation for the morphologies of micro/nano and thesolution for their microstructures

Observation of the growth pattern of the TiN micro/nanosprings〃

Evaluation of SOFC cathode performance based on traceelement behavior〃

Recycle of silicon from silicon sludge using supercritical water〃

Synthesis of lithium phosphate glass ceramics and evaluation of
Junichiro Otomo
lithium ion conductivity〃

Development of an intermediate temperature fuel cell using a
proton conducting electrolyte

Ryoto Kawamura

Junichiro Otomo

Synthesis of Electrolyte and Cathode Materials forIntermediate-Temperature Fuel Cells with Proton-Conducting
Electrolyte〃

Takashi Yamamoto

Junichiro Otomo

Synthesis and characterization of high ion-conductive
electrolytes of Ceria ceramics for intermediate-temperaturesolid oxide fuel cell and metal-air battery〃

Hajime Sagayama

Investigation of strongly correlated electron systems withgeometrical frustration

Design of strongly correlated electron systems with geometrical
Taka-hisa Arima
frustration

Title

Ibaraki University

Tokyo University of
ScienceTokyo University of
Science

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

Organization

今成 慶

千葉工業大学37 新規磁石材料の微細構造解析

47

加藤 智嗣

東京大学

Cu-Ni-Co 系合金中のCo 微粒子の析出過程と磁気特性の関係
李 東海

西本 一恵

横浜国立大学

東京大学

超臨界流体中プラズマによるダイヤモンドイド合成 パイ デイビッ
東京大学における反応機構の探索
ド

〃

東京大学

石井 千佳子 東京大学

超臨界二酸化炭素中レーザー誘起プラズマによ シュタウス ス
るナノ微粒子合成
ヴェン

46 正20面体準結晶および近似結晶の構造相転移

45

44

43

〃

東京大学

超臨界二酸化炭素プラズマによるカーボンナノマ シュタウス ス
テリアルの合成、分離及び評価
ヴェン

41

42

東京大学

東京大学

シュタウス スヴェン

大島 郁人

超臨界キセノン及び二酸化炭素中パルスレー
ザープラズマによるダイヤモンドイドの合成

〃

40

39

シュタウス スヴェン
東京大学

理化学研究所

幾何学的フラストレーションを有するパイロクロア
36 型酸化物の金属絶縁体転移に伴う結晶構造変化 山本 文子の解析

マイクロキャピラリー超臨界流体プラズマによるカーボンナノマテリアルの合成

産業技術総合研究所

マイクロミキサを用いた機能性ナノ粒子の連続水
陶 究
熱合成

35

38

産業技術総合研究所

ナノ構造制御による二次電池等の機能性材料開
細野 英司
発

34

齋藤 哲治

北海道大学

MnSiO3成分のMgSiO3組成とCaSiO3組成のケイ酸
李 林
塩ペロブスカイトへの分配

東京理科大学

東京理科大学

33

〃

32

氏名

田村 隆治

課題名

31 Fe基磁性材料のTEM観察

No.

Partitioning of MnSiO 3 content between MgSiO 3 and CaSiO3
perovskites〃

TEM study of Fe based magnetic materials

Title

Structural phase transitions in icosahedral quasicrystals andcrystalline approximants

生産技術研究所
大学院工学府

Investigation of the reaction mechanisms in the synthesis of
diamondoids by plasmas in high-pressure and supercriticalfluidsPrecipitation behavior and magnetic properties of fine Co
particles in Cu-Ni-Co alloys〃

Synthesis of nanomaterials by laser induced plasmas insupercritical CO2

Lee dong hae

Kazue Nishimoto

David Pai

Satoshi KatoSven Stauss

Chikako Ishii

Sven Stauss

Synthesis, separation and characterization of carbon
nanomaterials using plasmas generated in supercritical CO 2〃

Sven Stauss

Fumito Oshima

Sven Stauss

Synthesis of diamondoids by pulsed laser plasmas in highpressure and supercritical CO 2 and Xe〃

Synthesis of carbon nanomaterials using supercritical fluid
plasma generated in micro capillaries

大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科

Yokohama National
University

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

Chiba Institute ofTechnology
Tetsuji Saito

Microstructural studies of newly developed permanent magnet
materials

工学部

Kiwamu Sue

National Institute ofIndustrial Science andTechnology
National Institute ofIndustrial Science andTechnology

Hokkaido University

Tokyo University of
ScienceTokyo University of
ScienceOrganization

RIKEN

Continuous hydrothermal synthesis of functional nanoparticles
using a micromixer

Eiji Hosono

Li LinKei Imanari

Ryuji Tamura

Name

Analysis of a change in crystal structure of pyrochlore-typeoxides showing metal-insulator transition caused by geometrical Ayako Yamamoto
frustration

ナノシステム研
究部門

エネルギー技術 Development of the functional materials such as secondary
研究部門
battery by the nanostructure control

大学院理学院

大学院基礎工
学研究科

基礎工学部

所属

諏訪 秀和

56
物質創成科学研究科

奈良先端科学
技術大学院大
学

谷口 智洋

61

高際 良樹

〃

〃

63

64

住吉 篤郎

木村 薫

62 13族クラスター固体の電子物性に関する研究

〃

門脇 広明

60 Tb2Ti2O7における量子スピン液体状態の研究

東京大学

東京大学

東京大学

首都大学東京首都大学東京〃大学院理工学研究科〃〃

Electronic Properties of Group 13 elements-based Cluster
SolidsQuantum spin liquid in Tb 2Ti2O7

大学院理工学
研究科

Yositaka Yoshida

Magnetic property in superconducting fine particles of metal
carbideAtsuro Sumiyoshi

Yoshiki Takagiwa

Kaoru Kimura

Tomohiro Taniguchi

Hiroaki Kadowaki

Mahoto Takeda

Ken Hattori

Suwa Hidekazu

Masahiko Hiroi

Taishi Horibe

Masashi Hasegawa

Seiki Mitsumori

Keiji Kusaba

Yuya Nishisako

SQUID measurements of Mn-silicide thin films〃

Study on the magnetic and electrical properties of Heusler
compounds〃

Magnetic properties of noble materials synthesized using highpressure polymer-derived reactions〃

Magnetic properties of copper compounds synthesized underhigh pressure and high temperature〃

The relationship between microstructure and magnetic
properties of nano-scale Fe particles in Cu-Ni-Fe alloys

大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科

Takashiro Akitsu

Name

Study on the magnetic and transport properties of half-metallic
Iduru Shigeta
Heusler alloys

Magnetism of hybrid assemblies of chiral Cu(II) complexes andfunctional metal compounds

Title

大学院工学研究院

いわき明星大学 科学技術学部

大学院理工学研究科

大学院理工学研究科

大学院工学研究科

大学院工学研究科

大学院工学研究科

大学院工学研究科

大学院理工学研究科

大学院理工学
研究科

理学部

所属

鹿児島大学

鹿児島大学

名古屋大学

Cu-Ni-Fe系合金中における析出ナノ粒子の磁化
竹田 真帆人 横浜国立大学
配向と磁気特性の関係

吉田 喜孝

58 金属炭化物微粒子の超伝導磁気特性

59

服部 賢

57 Mnシリサイド薄膜試料のSQUID測定

〃

廣井 政彦

〃

55 ホイスラー型化合物の磁性と伝導の研究

54

堀部 太嗣

名古屋大学

高分子前駆体高圧合成法で得られた新物質の磁
長谷川 正
気特性

53

名古屋大学

光森 成生

〃

52

名古屋大学

鹿児島大学

草場 啓治

西迫 裕也

51 高温高圧合成した銅化合物の磁気特性

〃

鹿児島大学

ハーフメタル型ホイスラー合金の磁性と輸送特性
重田 出
に関する研究49

50

東京理科大学

氏名

キラル銅(II)錯体-機能性金属化合物複合系の磁
秋津 貴城
性

課題名

48

No.

The University ofTokyo

The University ofTokyo

The University of
Tokyo

Tokyo Metropolitan
University

Tokyo Metropolitan
University

Yokohama National
University

Iwaki-Meisei
University

Nara Institute of
Science andTechnology

Kagoshima University

Kagoshima University

Nagoya University

Nagoya University

Nagoya University

Nagoya University

Kagoshima University

Kagoshima University

Tokyo University of
ScienceOrganization幾何学的フラストレーションと強相関に基づく物性
新居 陽一
開拓
東京大学

Research of strongly correlated electron systems withgeometrical frustration

大学院新領域
創成科学研究科〃

8〃

11 Vドープβ-ボロンのSEMによる組成分析

10

原 章悟

李 備戦

周 迪帆

金沢 育三

中村 敬人

SPS法によるAl基準結晶の作製と電気抵抗への熱
田村 隆治
処理の効果

〃

7

9

〃

6

東京学芸大学

東京理科大学

東京理科大学

東京海洋大学

東京海洋大学

東京海洋大学

東京海洋大学

東京海洋大学

バルク高温超伝導体および関連磁性酸化物の磁
和泉 充性と構造組織観察4

都築 啓太

横浜国立大学

AgをドープしたFeSe0.5Te0.5超伝導体の構造解析 右田 稔

3

〃

東京大学

セメント硬化体・セラミック系建材の分光反射率測
北垣 亮馬
定と日射熱制御に関する研究

2

5

東京大学

氏名

結晶膜蒸留法を用いて濃縮水に含まれるリンと窒白土 敬介
素の回収・固定化プロセスの検討

課題名

1

No.

〃

〃

大学院海洋科
学技術研究科
大学院海洋科
学技術研究科

自然科学系

大学院基礎工
学研究科

Shogo Hara

Beizhan Li

Zhou Difan

Keita Tsuzuki

Mitsuru Izumi

Minoru Migita

Composition analysis of Vanadium doped beta-Boron byscanning electron microscope〃

Ikuzo Kanazawa

Takahito Nakamura

Effect of heat treatment on the electrical resistivity of
Ryuji Tamura
icosahedral Al-based quasicrystal prepared by the SPS method〃

大学院海洋科
学技術研究科

Magnetism and structural organization of bulk hightemperature superconductor and the related magnetic oxides

Structural analysis of Ag doped FeSe 0.5Te0.5 superconductor

Controlling solar radiation heat by designing surface reflectivity
Ryoma Kitagakiof cementious/ceramic material for building use

〃

基礎工学部

Name

Yoichi Nii

Asuka Kimura

Yusuke Matsuura

Kouichi Kitahara

Name

Recovery and solidification of nutrients from brine in membrane
Keisuke Shirado
distillation crystallizer

大学院海洋科
学技術研究科

大学院海洋科
学技術研究科

大学院工学府大学院工学系
研究科

大学院工学系
研究科

所属
Title

SQUID measurements of Mn-silicide thin films〃

Electronic Properties of Group 13 elements-based Cluster
SolidsTitle

物質創成科学研究科

大学院新領域
創成科学研究科
大学院新領域
創成科学研究科

所属

物質合成・評価設備Uクラス（Materials Synthesis and Characterization U Class Researcher）

68

67 Mnシリサイド薄膜試料のSQUID測定

東京大学

東京大学

奈良先端科学
木村 明日香 技術大学院大
学

松浦 裕介

〃

66

氏名

北原 功一

課題名

65 13族クラスター固体の電子物性に関する研究

No.

Tokyo Gakugei
University

Tokyo University of
ScienceTokyo University of
ScienceTokyo University ofMarine Science andTechnology
Tokyo University ofMarine Science andTechnology
Tokyo University ofMarine Science andTechnology
Tokyo University ofMarine Science andTechnology
Tokyo University ofMarine Science andTechnology

Yokohama National
University

The University ofTokyo

The University ofTokyo

Organization

The University of
Tokyo

Nara Institute of
Science andTechnology

The University ofTokyo

The University ofTokyo

Organization

網塚 浩

網塚 浩

阿曽 尚文

藤原 哲也

La1-xUxRu2Si2 (x > 0.9)における磁気秩序構造と磁気励起

重い電子系URu2Si2の磁気励起

量子臨界点近傍にあるYbCo2Zn20の磁気励起

EuCo2P2の磁気構造解析

スピンアイスにおけるトポロジカル相転移

重い電子系物質YbCo2Zn20における圧力誘起反松林 和幸
強磁性秩序の研究

2

3

4

5

6

7

門脇 広明

佐藤 卓

氏名

GPTAS（汎用3軸中性子分光器）IRT課題

課題名

1

No.

中性子（Neutron Scattering Researcher）

東京大学

首都大学東京

山口大学

琉球大学

北海道大学

北海道大学

東京大学

東京理科大学

低次元電子系の高周波伝導率の測定

3

設楽 航

四極子転移を示すPrTr2Al20の圧力効果と電子状
田中 斗志貴 日本大学
態

2

氏名

極紫外レーザー時間分解光電子分光によるトポロ
山本 貴士
ジカル絶縁体の研究

課題名

1

No.

長期留学研究員（Long Term Young Researcher）

東京理科大学

東京学芸大学14

齋藤 誠

東京学芸大学13 Al系準結晶の熱電特性及びSEMによる組成分析 金沢 育三〃

東京学芸大学

氏名

山田 浩平

課題名

12 Vドープβ-ボロンのSEMによる組成分析

No.

Naofumi Aso

Hiroaki Kadowaki
KazuyukiMatsubayashi

Magnetic excitations in YbCo 2Zn20 in vicinity of a quantum
critical point
Magnetic structure analysis of EuCo 2P2
Topological phase transitions in spin ice
Pressure induced antiferromagnetic order in heavy fermion
YbCo2Zn20

理学部
大学院理工学研究科
大学院理工学研究科
物性研究所

Hirsohi Amitsuka

Magnetic Excitation of Heavy-Electron Compound URu 2Si2

大学院理学研究院

Tetsuya Fujiwara

Hirsohi Amitsuka

Magnetic Ordering Structure and excitations in La 1-xUxRu2Si2(x > 0.9)

大学院理学研究院

Name

Taku J Sato

Title

IRT: GPTAS(Triple Axis Spectrometer)

物性研究所

所属

Measurement of the high-frequency conductivities of lowdimensional electron systems

大学院基礎工学研究科

Wataru Shitara

Toshiki Tanaka

High Pressure effect and Electronic Structure of Quadrupolar
Order PrTr 2Al20

大学院総合基礎科学研究科Name

Takashi Yamamoto

Title

Makoto Saito

Ikuzo Kanazawa

Thermoelectric properties and composition analysis, of Al
based icosahedral quasicrystals and approximate crystals, byscanning electron microscope〃

Kouhei Yamada

Name

Composition analysis of Vanadium doped beta-Boron byscanning electron microscope

Title

Study of Topological insulator using EUV Laser time-resolved
photoemission spectroscopy

大学院理学研
究科

所属

大学院教育学
研究科

自然科学系

大学院教育学研究科

所属

The University of
Tokyo

Tokyo Metropolitan
University

Yamaguchi University

University of the
Ryukyus

Hokkaido University

Hokkaido University

The University ofTokyo

Organization

Tokyo University of
Science

Nihon University

Tokyo University of
ScienceOrganization

Tokyo Gakugei
University

Tokyo Gakugei
University

Tokyo Gakugei
University

Organization

導電性三角格子磁性体PdCrO2の反強磁性秩序
高津 浩
と異常伝導
上床 美也

山 照夫

横山 淳

10GPa級中性子散乱実験用圧力発生装置の開発

新しい籠状物質PrTM2Al20 (TM=V,Cr)の四極子
秩序と結晶場励起

重い電子系ウラン化合物の隠れた秩序に対する一軸応力効果

18

19

20

21

空間反転対称性を持たない超伝導体CeIrSi3の非阿曽 尚文
整合磁気構造

24

網塚 浩

UPd2Si2におけるフラストレートした反強磁性相関の１軸応力および静水圧効果

23

李 哲虎

東京大学

田畑 吉計

新しいタイプの遍歴電子フラストレート磁性体
A3B3Xの動的スピン相関1722 鉄系超伝導体のスピン揺動

首都大学東京重松 宏武

強誘電体の相転移機構（変位型及び秩序 無秩序型）に関する統一的理解の確立

16

琉球大学

北海道大学

理学部

大学院理学研究院

Hirsohi Amitsuka

Chul-Ho Lee

Incommensurate Magnetic Structure in a Non-Centrosymmetric
Naofumi Aso
Superconductor CeIrSi 3

Effects of Uniaxial Stress and Hydrostatic Pressure on
Frustrated Antiferromagnetic Correlations in UPd 2Si2エネルギー技術
Spin fluctuations of iron-based superconductors
研究部門

産業技術総合研究所

Makoto Yokoyama

University of the
Ryukyus

Hokkaido University

National Institute ofAdvanced Industrial
Science and Technology

Ibaraki University

The University ofTokyo

Quadrupolar order and crystal field excitations in the new cage
Teruo Yamazaki
compound PrTM 2Al20 (TM=V,Cr).
Effect of uniaxial stress on hidden order in U-based heavyfermion compound

The University ofTokyo
Yoshiya Uwatoko

Development of high pressure apparatus for elastic neutron
scattering experiments

Tokyo Metropolitan
University

Antiferromagnetism and its relation to the anomalous
conductivity in the metallic triangular-lattice magnet PdCrO 2

Hiroshi Takatsu

Kyoto University

Dynamic spin correlations in novel itinerant-electron frustrated
Yoshikazu Tabatamagnets A3B3X

Hirotake Shigematsu ShimaneUniversity

Establishment of the unified explanation about the phasetransition mechanism (displacive and order-disorder type) in
Ferroelectrics

The University ofTokyo
Taku J SatoThe University ofTokyo

Magnetic excitations in the s=1/2 kagome antiferromagnet
volborthite

Taku J Sato

Nagoya University

Study on the correlation of magnetism and superconductivity in
Noriaki Sato
CeRhxIr(1-x)In5
Search for the Coulomb phase in the Dy 3Al5O12 garnet

Nagoya University

Noriaki Sato

Nagoya University

Tohoku Universdity

Study on the quantum criticality and correlation of magnetismand superconductivity in CeTe 3 and TbTe3

Yukio Noda

Magnetic interaction and ferroelectricity in multiferroic
YMn2O5The University of
Tokyo

Noriaki Sato

Yusuke Nambu

Magnetic fluctuations in stoichiometric iron-based
superconductors LiFe(As,P)Tokyo University of
ScienceOrganization

Study on spin fluctuations of the superconducting ferromagnet
UCoGe

Kiyoichiro Motoya

Name

Real-time observation of magnetic structural change by meansof time-resolved neutron scattering experiments

Title

理学部

物性研究所

物性研究所

大学院理工学研究科

大学院工学研
究科

教育学部

物性研究所

物性研究所

大学院理学研究科

大学院理学研究科

大学院理学研究科

多元物質科学
研究所

物性研究所

理工学部

所属

茨城大学

東京大学

京都大学

山口大学

東京大学

佐藤 卓

s=1/2 籠目格子反強磁性体 volborthite の磁気
励起

名古屋大学

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

13

15

名古屋大学

CeTe3およびTbTe3における量子臨界現象および
佐藤 憲昭
磁性と超伝導の相関の研究

12

東京大学

名古屋大学

佐藤 憲昭

強磁性超伝導体UCoGeにおけるスピン揺らぎの
研究

11

佐藤 卓

東北大学

マルチフェロイック物質YMn2O5の磁気励起と磁気
野田 幸男
相互作用

10

14 Dy3Al5O12 ガーネットにおけるクーロン相の探索

東京大学

南部 雄亮

鉄系超伝導体LiFe(As,P)の磁気揺らぎ

9

氏名

時間分割中性子散乱測定による磁気構造変化過元屋 清一郎 東京理科大学
程の実時間追跡

課題名

8

No.

益田 隆嗣29 PONTA（高性能偏極中性子散乱装置）IRT課題

東京大学

萩原 雅人

益田 隆嗣

益田 隆嗣

四面体構造を持つ量子スピン磁性体
Cu2(OD)3Cl(Clinoatacamite)の磁気励起3334 強磁性ダイマーCs3V2Cl9の中性子散乱

35 アルカリ超酸化物KO2の磁気励起

南部 雄亮

東京大学

東京理科大学

マルチフェロイックCuFeO2における2軸圧力による
中島 多朗
磁気・強誘電ド メイン配向制御

4041 NiGa2S4におけるスピンネマティック相関の検出

東京理科大学

多段メタ磁性体Ca3Co2O6における磁気構造の長茂吉 武人
時間変化へのdisorderの効果

元屋 清一郎 東京理科大学

39

38 磁気構造の長時間変化と磁性原子希釈効果

時間分割中性子散乱測定による磁気構造変化過元屋 清一郎 東京理科大学
程の実時間追跡37

東北大学

リラクサーPMN-xPTにおける低エネルギーフォノ
ンモードの研究II

東京大学

36

松浦 直人

東京大学

一次元フラストレート鎖量子磁性体CaCuVO4(OD)
萩原 雅人
の磁気励起

32

東京大学

九州工業大学高エネルギー磁気励起測定によるBi2201の磁気励
榎木 勝徳
起分散の研究東北大学

東京大学

諏訪東京理科大学

31

PONTA（高性能偏極中性子散乱装置）IRT課題
30 偏極中性子線を用いた磁気散乱中性子線ホログ 林 好一
ラフィー

内海 重宜

中性子回折法による六方晶フェライト
28 (Ba1-xSrx)2Zn2Fe12O22およびBa(Fe1-xScx)12O19の超交換相互作用の研究

元屋 清一郎 東京理科大学

27 磁気構造の長時間変化と磁性原子希釈効果

山口大学

藤原 哲也

山口大学

26 EuRu2P2の磁気構造解析

氏名

藤原 哲也

課題名

25 重い電子系新物質Ce2Pt3Ge5の磁気構造解析

No.

物性研究所

理学部

理工学部

理工学部

理工学部

金属材料研究
所

物性研究所

物性研究所

物性研究所

物性研究所

大学院工学研
究院

金属材料研究所

物性研究所

Taro Nakajima

Biaxial-pressure control of multiferroic domain structure in
spin-driven ME multiferroic CuFeO 2

Detection of spin nematic correlation in the 2D magnet NiGa 2S4 Yusuke Nambu

Taketo Moyoshi

Kiyoichiro Motoya

Dilution effect of magnetic atoms on the long-time variation ofmagnetic structure
Effect of Disorder on the Long-Time Variation of Magnetic
Structure in a Multistep Metamagnet Ca 3Co2O6

Kiyoichiro Motoya

Masato Matsuura

Takatsugu Masuda

Takatsugu Masuda

Masato Hagihala

Masato Hagihala

Masanori Enoki

Koichi Hayashi

Takatsugu Masuda

Real-time observation of magnetic structural change by meansof time-resolved neutron scattering experiments

Study of extremely low energy phonon mode in PNR of relaxor
PMN-xPTⅡ

Magnetic excitation in Alkali superoxide KO2

Neutron scattering study in ferromagnetic dimer Cs 3V2Cl9Magnetic excitation in tetrahedral quantum spin compound
Cu2(OH)3Cl (Clinoatacamite)

Magnetic excitation of one dimensional quantum frustrated
chain magnetism CaCuVO4(OD)

Study of magnetic excitation dispersion in Bi 2201 by
measurement of high-energy excitation

IRT: PONTA(Polarized Neutron Triple Axis Spectrometer)

IRT: PONTA(Polarized Neutron Triple Axis Spectrometer)

Study on superexchange interactions of hexagonal ferrites
システム工学部 (Ba1-xSrx)2Zn2Fe12O22 and Ba(Fe1-xScx)12O19 by neutron
diffraction

Shigenori Utsumi

Kiyoichiro Motoya

Dilution effect of magnetic atoms on the long-time variation ofmagnetic structure

理工学部

Tetsuya Fujiwara

Magnetic structure analysis of EuRu 2P2

大学院理工学研究科

Tetsuya Fujiwara

Name

Magnetic structure analysis of new heavy fermion material
Ce2Pt3Ge5

Title

大学院理工学研究科

所属

The University of
Tokyo

Tokyo University of
ScienceTokyo University of
ScienceTokyo University of
ScienceTokyo University of
ScienceTohoku University

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

Kyushu Institute ofTechnology

Tohoku University

The University of
Tokyo

Tokyo University of
Science, Suwa

Tokyo University of
Science

Yamaguchi University

Yamaguchi University

Organization

藤田 全基高精度測定によるFe-LSCOの異方的磁気秩序ピークの起源の研究

58

留野 泉

56 混晶系Ba1-xCaxTiO3のフォノン
岩佐 和晃

高橋 美和子 筑波大学

55 3元合金CuFePt6の磁気構造

TOPAN（東北大理：３軸型偏極中性子分光器）
IRT課題

茂吉 武人

54 三角格子系NaxNiO2の磁気構造

57

松岡 由貴

53 MnRhの低温相及び高温相の磁気構造相転移

東北大学

東北大学

秋田大学

東京理科大学奈良女子大学

総合科学研究機構

佐藤 正俊

52 鉄系超伝導体単結晶のフォノン

長谷 正司

偏極中性子を用いたCu3Mo2O9単結晶の磁気構
造の決定

50

大学院理学研究科

教育文化学部

教育文化学部

教育文化学部

大学院理工学研究科

大学院工学研
究科

物性研究所

所属

Hiroshi Takatsu

Antiferromagnetism and its relation to the anomalous
conductivity in the metallic triangular-lattice magnet PdCrO 2

Masashi Hase

Investigation of magnetic reflections in a (CuZn) 3Mo2O9 single
crystal

金属材料研究所

大学院理学研究科

Izumi Tomeno

Miwako Takahashi

Taketo Moyoshi

Yuki Matsuoka

Origin of anisotropic magnetic peak in Fe-LSCO studied withhigh resolution measurement

Masaki Fujita

IRT: TOPAN(Tohoku-University Polarization Analysis Neutron
Kazuaki Iwasa
Spectrometer)

Phonons in (Ba,Ca)TiO3

Magnetic structure of CuFePt 6 ternary alloy

大学院数理物質科学研究科
教育文化学部

Magnetic structure of a triangular system Na xNiO2Magnetic phase transformations in B 2-phase and L10-phase

理工学部

理学部

Masatoshi Sato

Masashi Hase

Determination of the magnetic structure of a Cu 3Mo2O9 single
crystal using polarized neutrons

Tohoku University

Tohoku University

Akita University

University of Tsukuba

Tokyo University of
ScienceNara Women's
University

Comprehensive Research
Organization for Scienceand Society

National Institute forMaterials Science

National Institute forMaterials Science

National Institute forMaterials Science
Masashi Hase

Investigation of spin gap excitations in the spin-3/2
antiferromagnetic alternating chain substances RCrGeO 5(R=Sm, Y or Nd)

Akita University

Akita University

Nagoya University

Izumi Tomeno

Izumi Tomeno

Akita University

Tokyo Metropolitan
University

Kyoto University

The University ofTokyo

Organization

LaCo1-xRhxO3:Ferromagnetism induced by doping between two
Yukio Yasuinonmagnetic end phase

Phonons in FeTe 1-xSex

Temperature dependence of phonons in cubic BaTiO 3

Izumi Tomeno

Yoshikazu Tabata

Anomalous spin dynamics in the magnetic ordered state of thediluted Ising antiferromagnet Ho xY1-xRu2Si2

Phonons in ordered perovskite CaCu 3Ti4O12

Minoru Soda

Name

E+F914lectric control of nano magnetic domain in relaxor
ferroelectrics having magnetic ions

Title

サイエンス コー Phonon Measurements of Single Crystal Samples of Fe-based
ディネーター
Superconductors

量子ビームユ
物質・材料研究
ニット中性子散機構
乱グループ
量子ビームユ
物質・材料研究
ニット中性子散機構
乱グループ
量子ビームユ
物質・材料研究
ニット中性子散
機構
乱グループ

長谷 正司

長谷 正司

スピン3/2の反強磁性交替鎖を持つRCrGeO5(R=Sm, Y or Nd)のスピン・ギャップ励起の研究

49

名古屋大学

秋田大学

秋田大学

51 (CuZn)3Mo2O9単結晶の磁気反射の測定

安井 幸夫

LaCo1-xRhxO3:非磁性状態をend phaseに持つ
dopingによって現れる強磁性

留野 泉

47 FeTe1-xSex系のフォノン

48

留野 泉

46 立方晶BaTiO3のフォノンの温度依存性

秋田大学

首都大学東京導電性三角格子磁性体PdCrO2の反強磁性秩序
高津 浩
と異常伝導

44

留野 泉

京都大学

希釈イジング反強磁性体HoxY1-xRu2Si2の磁気秩
田畑 吉計
序相における異常スピンダイナミクス

43

45 秩序型ペロブスカイトCaCu3Ti4O12のフォノン

東京大学

氏名

磁性イオンをもつリラクサー誘電体におけるナノ磁
左右田 稔
気ドメインの電場制御

課題名

42

No.

氏名

東北大学

電子ドープした重い電子系Pr(Fe1-xCox)4P12の磁
気励起

65

東北大学

九州大学

高温超伝導体LSCO擬ギャップ相における磁気励
松浦 直人
起の温度依存性
光田 暁弘

富安 啓輔

富安 啓輔

極低温単結晶中性子回折によるYbPdの磁気構造および金属的電荷秩序の検証

希薄不純物置換LaCoO3系における巨大磁気モーメントを伴うスピン分子ポーラロンの研究

金属絶縁体転移を示す導電性フラストレート系
R2Ir2O7における磁気構造と内部磁場の研究

69

70

71

72

Magnetic Octupole Order in Ce 0.5La0.5B6

大学院先端物質科学研究科Akihiro Mitsuda

Masato Matsuura

茨城大学

理学部理学科IRT: HER(High Energy Resolution Triple-Axis Spectrometer)

Neutron diffraction on Ce 0.7La0.3B6 under uniaxial pressure

Jun Yokoyama

Keitaro Kuwahara

桑原 慶太郎 茨城大学

74 Ce0.7La0.3B6の一軸圧下中性子回折大学院理工学研究科

Keisuke Tomiyasu

Chul-Ho Lee

Magnetic structure and internal magnetic field in conductive
frustrated system R 2Ir2O7 with metal-insulator transition

Molecular spin polaron with colossal magnetic moment in lightly
Keisuke Tomiyasu
impurity doped LaCoO 3 system

Study on metallic charge order of YbPd by single-crystal
neutron diffraction at lowest temperature

Investigation of the thermal variation of magnetic spectra inpseudogap phase of high-Tc superconductor LSCO

Masato Matsuura

エネルギー技術
Spin fluctuations of iron-based superconductors
研究部門

大学院理学研究科

大学院理学研
究院

金属材料研究所

金属材料研究所

Ibaraki University

Ibaraki University

National Institute ofAdvanced Industrial
Science and Technology

Tohoku University

Tohoku University

Kyushu University

Tohoku University

Tohoku University

Takeshi Matsumura Hiroshima University

Takeshi Matsumura Hiroshima University

産業技術総合研究所

李 哲虎

HER (高エネルギー分解能３軸型中性子分光器)
横山 淳
IRT課題

Pressure induced antiferroquadrupole order in CeTe

大学院先端物質科学研究科

大学院理学研究科

73 鉄系超伝導体のスピン揺動

75

Tohoku University

Magnetic excitation in the electron-doped heavy-electron
system Pr(Fe1-xCox)4P12

大学院理学研究科

Investigation of Ni-impurity doping effect on magnetic
excitations in high-Tc superconductor LSCO II

Tohoku University

An Order Parameter Enhanced by Magnetic Field in the Kondo
Kazuaki Iwasa
Semiconductor CeOs 4Sb12+F519

大学院理学研究科

Kazuaki Iwasa

Tohoku University

Kazuaki Iwasa

Search for a quadrupole ordering by the non-Kramers doublet
in PrIr2Zn20

大学院理学研究科

Kyushu Institute ofTechnology

Ibaraki University

Tohoku University

Tohoku University

Organization

Neutron scattering study of high temperature anti-ferromagnet
Satoshi Iikubo
TlFe2Se2

大学院生命体
工学研究科

Determination of crystalline electrical field level of Kondo alloy
Fumitoshi Iga
Yb1-xTmxB6

Haruhiro Hiraka

High-temperature spin excitations in antiferromagnetic metal
Mn3Si

金属材料研究所
理学部

Masaki Fujita

Name

Hole-doping effect on spin correlations in a new cuprate oxideof T'-structured Pr 2-xCaxCuO4

Title

金属材料研究
所

所属

東北大学

東北大学

東北大学

広島大学

高温超伝導体LSCOの磁気励起における磁性不松浦 直人
純物Ni置換効果の研究II

松村 武

67 Ce0.5La0.5B6における磁気八極子秩序の検証

68

松村 武

66 CeTeにおける圧力誘起反強四極子秩序

広島大学

東北大学

近藤半導体CeOs4Sb12における磁場によってエン岩佐 和晃
ハンスされる秩序変数

64

岩佐 和晃

東北大学

PrIr2Zn20における非Kramers二重項による四極子
岩佐 和晃
秩序の検証

九州工業大学

63

飯久保 智

茨城大学

高い反強磁性転移温度をもつ鉄系化合物
TlFe2Se2の磁性

伊賀 文俊

61 近藤合金Yb1-xTmxB6の結晶場遷移

東北大学

東北大学

62

平賀 晴弘

新規T'構造銅酸化物Pr2-xCaxCuO4における磁気
藤田 全基
相関のホールドープ効果

課題名

60 反強磁性金属Mn3Siにおける高温スピン励起

59

No.

La1-xUxRu2Si2 (x > 0.9)における磁気秩序構造と
磁気励起

76

東北大学

東北大学

東北大学

新規T'構造銅酸化物Pr2-xCaxCuO4における磁気
藤田 全基
相関のホールドープ効果(Pr1-xCex)Ru4P12のリエントラント型金属 非金属転岩佐 和晃
移における全対称型高次多極子秩序の研究

電子ドープした重い電子系Pr(Fe1-xCox)4P12の磁
気励起

81

82

83

東京大学

東北大学

名古屋大学

名古屋大学

南部 雄亮

マルチフェロイック物質YMn2O5の磁気励起と磁気
野田 幸男
相互作用
佐藤 憲昭

89 鉄系超伝導体LiFe(As,P)の磁気揺らぎ

強磁性超伝導体UCoGeにおけるスピン揺らぎの研究

CeTe3およびTbTe3における量子臨界現象および
佐藤 憲昭
磁性と超伝導の相関の研究

90

91

92

東京大学

東京理科大学南部 雄亮

スピン格子結合系CuFeO2のスピン波分散関係の満田 節生
一軸応力変化

東京大学

88 鉄系スピンラダーBaFe2Se3の磁気揺動

87

益田 隆嗣

東京大学

フラストレート強磁性鎖におけるスピン・ネマティッ
益田 隆嗣
ク相関の検出86 強磁性ダイマーCs3V2Cl9の中性子散乱

85

東京大学

益田 隆嗣

84 酸素吸着Cuジカルボン酸の低エネルギー励起

東北大学

藤田 全基

高精度測定によるFe-LSCOの異方的磁気秩序ピークの起源の研究

80

岩佐 和晃

九州工業大学高エネルギー磁気励起測定によるBi2201の磁気
榎木 勝徳
励起分散の研究

琉球大学

79

阿曽 尚文

琉球大学

北海道大学

空間反転対称性をもたない超伝導体
CeTSi3(T=Rh,Ir)の磁気励起

阿曽 尚文

網塚 浩

氏名

78

77 量子臨界点近傍にあるYbCo2Zn20の磁気励起

課題名

No.

大学院理学研究科

大学院理学研究科

多元物質科学
研究所

物性研究所

物性研究所

理学部

物性研究所

物性研究所

物性研究所

大学院理学研究科

大学院理学研究科

金属材料研究所

金属材料研究所

大学院工学研
究院

理学部

理学部

大学院理学研究院

所属

Takatsugu Masuda

Low energy excitation in O2 adsorbed Cu-dicarboxylic acid

Noriaki Sato

Study on the quantum criticality and correlation of magnetismand superconductivity in CeTe 3 and TbTe3

Yukio Noda

Magnetic interaction and ferroelectricity in multiferroic
YMn2O5

Noriaki Sato

Yusuke Nambu

Magnetic fluctuations in stoichiometric iron-based
superconductors LiFe(As,P)

Study on spin fluctuations of the superconducting ferromagnet
UCoGe

Yusuke Nambu

Setsuo Mitsuda

Spin wave dispersion relation in a spin-lattice coupled system
CuFeO2 under uni-axial stressSpin dynamics of the iron-based spin ladder BaFe 2Se3

Takatsugu Masuda

Neutron scattering study in ferromagnetic dimer Cs 3V2Cl9

Takatsugu Masuda

Tohoku University

Kazuaki Iwasa

Magnetic excitation in the electron-doped heavy-electron
system Pr(Fe1-xCox)4P12

Detection of spin nematic correlation in frustrated
ferromagnetic chain

Tohoku University

Studies on totally symmetric higher-rank multipolar ordering
Kazuaki Iwasa
on the reentrant metal-nonmental transition of (Pr 1-xCex)Ru4P12

Nagoya University

Nagoya University

Tohoku Universdity

The University ofTokyo

The University of
Tokyo

Tokyo University of
Science

The University ofTokyo

The University ofTokyo

The University ofTokyo

Tohoku University

Masaki Fujita

Hole-doping effect on spin correlations in a new cuprate oxideof T'-structured Pr 2-xCaxCuO4

Tohoku University

Kyushu Institute ofTechnology

Masaki Fujita

Masanori Enoki

University of the
Ryukyus

University of the
Ryukyus

Hokkaido University

Organization

Origin of anisotropic magnetic peak in Fe-LSCO studied withhigh resolution measurement

Study of magnetic excitation dispersion in Bi2201 by
measurement of high-energy excitation

Naofumi Aso

Naofumi Aso

Magnetic excitations in YbCo 2Zn20 in vicinity of a quantum
critical point
Magnetic Fluctuations in a Non-CentrosymmetricSuperconductor CeTSi 3

Hirsohi Amitsuka

Name

Magnetic Ordering Structure and excitations in La 1-xUxRu2Si2(x > 0.9)Title重い電子系超伝導体CeRhxIr1-xIn5における磁性と超伝導の相関の研究

93

エネルギー技術
Spin fluctuations of iron-based superconductors
研究部門

佐賀大学
産業技術総合研究所

逐次相転移を示した三角格子物質Co2(OD)3Brの
鄭 旭光
フラストレーション磁性とスピン揺らぎ

101

高い反強磁性転移温度をもつ鉄系化合物
TlFe2Se2の磁性

富安 啓輔

繁岡 透

108 TbCu2Si2の複雑な磁気相図

希薄不純物置換LaCoO3系における巨大磁気モーメントを伴うスピン分子ポーラロンの研究

繁岡 透

107 成分分離逐次磁気転移の研究

109

繁岡 透

S=1/2擬一次元スピン・ギャップ物質Pb2V3O9の磁
益田 隆嗣
気励起

門脇 広明

飯久保 智

106 PrRh2Ge2の逐次磁気転移

105104 量子スピンアイスの研究

103

李 哲虎

東京大学

山 照夫

新しい籠状物質PrTM2Al20 (TM=V,Cr)の四極子
秩序と結晶場励起

100

102 鉄系超伝導体のスピン揺動

大学院工学系
研究科

東京大学

山 照夫

金属磁性体MnPにおけるDzyaloshinsky-Moriya
相互作用の逆効果の検証

東北大学

山口大学

山口大学

山口大学

東京大学

首都大学東京九州工業大学

Saga University

Study of the frustrated magnetism and spin fluctuations intriangular-lattice Co 2(OD)3Br

Takatsugu Masuda

Magnetic excitation in S=1/2 quasi 1D spin-gap compoundPb2V3O9
Successive magnetic transitions of PrRh 2Ge2
Study of component s-separated magnetic transition
Complex magnetic phase diagrams of TbCu 2Si2

物性研究所
大学院理工学研究科
大学院理工学研究科
大学院理工学研究科
大学院理学研究科

Hiroaki Kadowaki

Quantum spin ice

大学院理工学研究科

Molecular spin polaron with colossal magnetic moment in lightly
Keisuke Tomiyasu
impurity doped LaCoO 3 system

Toru Shigeoka

Toru Shigeoka

Toru Shigeoka

Neutron scattering study of high temperature anti-ferromagnet
Satoshi Iikubo
TlFe2Se2

Chul-Ho Lee

Tohoku University

Yamaguchi University

Yamaguchi University

Yamaguchi University

The University of
Tokyo

Tokyo Metropolitan
University

Kyushu Institute ofTechnology

National Institute ofAdvanced Industrial
Science and Technology

The University ofTokyo

Quadrupolar order and crystal field excitations in the new cage
Teruo Yamazaki
compound PrTM 2Al20 (TM=V,Cr).
Xu-Guang Zheng

The University ofTokyo
Teruo Yamazaki

Verification of the inverse effect of the Dzyaloshinsky-Moriya
interaction in metallic magnet MnP

大学院生命体
工学研究科

物性研究所

物性研究所

Hidekazu Tanaka

Tokyo Institute ofTechnology

99

大学院理工学研究科

Negative quantum renormalization of magnetic excitations inquasi-2D triangular-lattice antiferromagnets Ba 3MSb2O9(M=Co, Ni)

東京工業大学

The University ofTokyo
Kyoto University

擬2次元三角格子反強磁性体Ba3MSb2O9 (M=Co,田中 秀数Ni) の磁気励起と負の量子再規格化

大学院工学研
究科

物性研究所

The University ofTokyo

The University ofTokyo

Dynamic spin correlations in novel itinerant-electron frustrated
Yoshikazu Tabatamagnets A3B3X

98

京都大学

田畑 吉計

新しいタイプの遍歴電子フラストレート磁性体
A3B3Xの動的スピン相関

97

Minoru Soda

Magnetic Interaction between Absorbed O 2 Molecules in[Cu2(bza)4(pyz)]n

東京大学

左右田 稔

[Cu2(bza)4(pyz)]nにおける吸着酸素分子の磁気相関Taku J Sato

Magnetic Excitations in Quantum Spin Antiferromagnetic
Trimer System 2b 3CuCl 2 2H2O

96

物性研究所

東京大学

Taku J Sato

Search for the Coulomb phase in the Dy 3Al5O12 garnet

Nagoya University

Study on the correlation of magnetism and superconductivity in
Noriaki Sato
CeRhxIr1-xIn5

量子スピン反強磁性三量体系2b 3CuCl2 2H2Oの
佐藤 卓
磁気励起

物性研究所

大学院理学研究科

Organization

Name

Title

95

名古屋大学

所属

東京大学

佐藤 憲昭

氏名

佐藤 卓

94 Dy3Al5O12 ガーネットにおけるクーロン相の探索

課題名

No.

大学院人間文化創成科学研究科
大学院人間文
化創成科学研究科
大学院人間文
化創成科学研究科
大学院人間文
化創成科学研究科

お茶の水女子大学

Mitsuhiro Shibayama

中野 実

中野 実

126 膜脂質のダイナミクスに及ぼす膜の曲率の評価

眞山 博幸

メソ細孔を発達させたフラクタルポーラスシリカの
構造評価

123

125 膜貫通ペプチドのフリップフロップ誘起能の評価

東北大学

松浦 直人

リラクサー誘電体における自己相似プロファイル
の研究

122

中野 実

京都大学

界面不活性イオン性両親媒性高分子ミセルのナ
松岡 秀樹
ノ構造転移---誘電率の効果

121

124 POPCナノディスクの構造とダイナミクス

大学院工学研
究科

京都大学

松岡 秀樹

温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

120

京都大学

京都大学

京都大学

北海道大学

Micelle Formation and Nanostructure Transition of
Temperature Responsive Non-Surface Active/Surface Active
Transition Polymers
Nanostructure Transition of Non-Surface Active Ionic
Amphiphilic Diblock Copolymers --- Effect of Dielectric
Constant

物質創成科学研究科

奈良先端科学
技術大学院大学

片岡 幹雄

抗ガン作用のあるハイブリッドリポソームの構造と揺らぎの観測119

Induction of Flip-Flop by Transmembrane Peptides

Effects of Curvature on Dynamics of Membrane Lipids

大学院薬学研究科
大学院薬学研究科

Minoru Nakano

Minoru Nakano

Minoru Nakano

Structure and Dynamics of POPC Nanodiscs

大学院薬学研究科

Masato Matsuura

Hideki Matsuoka

Hideki Matsuoka

Toshiji Kanaya

Structural investigation of fractal porous silica created by novel
Hiroyuki Mayama
template and nano-composite methods

Investigation of power law profile in relaxor ferroelectrics

Role of high and low molecular weight components in flow
induced polymer crystallization

電子科学研究所

金属材料研究所

大学院工学研究科

The structure and dynamics of hybrid liposome with anticancer
Mikio Kataoka
function

化学研究所

京都大学

高分子流動結晶化における高分子量成分と低分
金谷 利治
子量成分の役割

118

Anomalous magnetic form factor in the vortex state on CeIrIn 5 Hazuki Furukawa

お茶の水女子
大学

希釈冷凍機温度領域におけるCeIrIn5の磁束の磁
古川 はづき気形状因子の異常

117

Hazuki Furukawa

Anomalous vortex state in Sr 2RuO4 studied by SANS
experiments

お茶の水女子大学

古川 はづきHazuki Furukawa

Hazuki Furukawa

Vortex study on Fe-based superconductor

SANS experiment on flux line lattice in K0.8Fe2Se2

Solution structure of phosphonate-based ionic liquid containing
Kenta Fujii
cellulose

IRT: SANS-U(Small Angle Neutron Scattering Instrument,
University of Tokyo)

Xu-Guang Zheng

Investigation of spin fluctuations in atacamite-type pyrochlore
compounds Mn 2(OD)3Cl and Mn2(OD)3Br

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115 新規Fe系超伝導BaFe2(AS,P)2の磁束研究

物性研究所

Keisuke Tomiyasu

Name

Magnetic structure and internal magnetic field in conductive
frustrated system R 2Ir2O7 with metal-insulator transition

Title

116

古川 はづき114 新規Fe系超伝導体K0.8Fe2Se2の磁束格子実験
お茶の水女子
大学

物性研究所

東京大学

phosphonate型イオン液体を溶解剤とするセル
ロースの溶存状態

113

藤井 健太

東京大学

SANS-U（二次元位置測定小角散乱装置）IRT課
柴山 充弘
題

112

大学院工学系
研究科

佐賀大学

大学院理学研究科

atacamite型四面体構造Mn2(OD)3Cl, Mn2(OD)3Br
鄭 旭光のスピン揺らぎ

東北大学

所属

111

富安 啓輔

氏名

金属絶縁体転移を示す導電性フラストレート系
R2Ir2O7における磁気構造と内部磁場の研究

課題名

110

No.

Kyoto University

Kyoto University

Kyoto University

Hokkaido University

Tohoku University

Kyoto University

Kyoto University

Nara Institute of
Science andTechnology

Kyoto University

Ochanomizu University

Ochanomizu University

Ochanomizu University

Ochanomizu University

The University ofTokyo

The University of
Tokyo

Saga University

Tohoku University

Organization

高圧条件下における２成分混合溶液の新奇な臨高エネルギー加 物質構造科学
貞包 浩一朗界挙動速器研究機構 研究所

129

京都大学

中性子小角散乱によるGM1含有Bicelleの構造解
杉山 正明
析

141

143

九州大学

東京大学

時分割SANS法によるイオン液体中のゲル化反応
柴山 充弘
メカニズム解明140

イオン液体と低分子液体混合系の動的秩序構造
高橋 良彰
の検討

東京大学

Rheo-FocusingSANSを用いたずり粘稠効果に伴う
柴山 充弘
紐状ミセル伸長機構の解明

139

京都大学

東京大学

結合不均一性を有するTetra-PEGゲルの延伸下
柴山 充弘
における構造解析

138

杉山 正明

東京大学

Tetra-PEGイオンゲルの均一網目構造に対するイ
柴山 充弘
オン液体の特殊反応場効果

137

142 マルチドメインタンパク質の動的性質の解明

東京大学

柴山 充弘

136 燃料電池電極用触媒インクの構造解析

東京大学

柴山 充弘

先導物質化学研究所

原子炉実験所

原子炉実験所

物性研究所

物性研究所

物性研究所

物性研究所

物性研究所

物性研究所

理学部

ナノメートルサイズベシクル上でのドメインダイナミ
お茶の水女子
佐久間 由香クス
大学

134

135 毛髪の内部構造解析

理学部

理学部

お茶の水女子
大学
お茶の水女子大学

佐久間 由香佐久間 由香132 自発曲率による脂質分子のソーティング

大学院工学系研究科

東京大学

後期エンドソームにおける特異的脂質BMPの分
布の非対称性酒井 崇匡

131 温度応答性部位を有するTetraゲルの構造解析

133

貞包 浩一朗

130 界面不活性の働きをする界面活性剤

高エネルギー加 物質構造科学
速器研究機構 研究所

高エネルギー加 物質構造科学
速器研究機構 研究所

貞包 浩一朗

水/有機溶媒/塩混合溶液系の秩序構造に対する圧力の効果128

大学院理学研
究院

所属

九州大学

氏名

N-isopropylacrylamide水溶液における相分離挙
岡部 哲士
動と疎水性水和への電解質効果の分子論的解明

課題名

127

No.

Examination of dynamically ordered structure in mixtures ofionic liquid and low molecular weight liquids

Investigation of Dynamics on Multi-domain Proteins

Structural Investigation of GM1-containing Bicelle by SmallAngle Neutron Scattering

Gelation process of Tetra-PEG ion gel studied by timeresolved small angle neutron scattering

Rheo-Focusing SANS study on shear induced transition of
wormlike micelle

Yoshiaki Takahashi

Masaaki Sugiyama

Masaaki Sugiyama

Mitsuhiro Shibayama

Mitsuhiro Shibayama

Mitsuhiro Shibayama

Mitsuhiro Shibayama

Effect of ionic liquid type on the structure of Tetra-PEG iongel Solvent effect of network structure of Tetra-PEG iongel
studied by SANS
Structual Analysis of Connective Defects Induced Tetra-PEG
gel Under Uniaxial Deformation

Mitsuhiro Shibayama

Mitsuhiro Shibayama

Yuka Sakuma

Yuka Sakuma

Yuka Sakuma

Takamasa Sakai

Koichiro Sadakane

Koichiro Sadakane

Koichiro Sadakane

Satoshi Okabe

Name

Structural studies on catalyst ink for fuel cell electrodes

Structural analysis of hair

Dynamics of Domains on a Nanometer-Sized Vesicle

Asymmetric Distribution of BMP on Late Endosome

Lipids Sorting Induced by Membrane Curvature andGeometrical Shape of Lipids

Structural analysis of thermo-responsive Tetra gel

Amphiphilic molecules acting as a surface inactive substance

Novel critical behavior in a mixture of water / organic solvent
under high-pressure condition

Pressure-induced phase transition in a mixture ofwater/organic solvent/salt

Molecular understanding of the effect of electrolytes on phaseseparation and hydrophobic hydration in the aqueous solutionsof NIPA

Title

Kyusyu University

Kyoto University

Kyoto University

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University of
Tokyo

Ochanomizu University

Ochanomizu University

Ochanomizu University

The University of
Tokyo

High Energy Research
Organization

High Energy Research
Organization

High Energy Research
Organization

Kyushu University

Organization

Micelle Properties of Novel Nonionic Gemini Surfactants to
Preserve Environment

高分子密集条件下におけるタンパク質の構造とダ平井 光博
イナミックス

小角中性子散乱によるインスリンアミロイド線維形
井上 倫太郎 京都大学
成機構に関する研究

153

154

九州大学

高エネルギー加 物質構造科学
速器研究機構 研究所

高橋 良彰

ひも状ミセルのシアーバンディング領域における構造の不安定性

セルロースの1‐ブチル‐3‐メチルイミダゾリウムクロ
高橋 良彰
リド溶液中の分子量と回転半径

脂質二重膜の曲げ弾性係数に対する面内ネット
ワーク構造の影響

158

159

160

山田 悟史

九州大学

柴山 充弘

東京大学

先導物質化学研究所

先導物質化学
研究所

物性研究所

物性研究所

157 水性アクリル樹脂分散体における粒子構造解析

東京大学

柴山 充弘

化学研究所

156 フェノール樹脂ゲル化過程の不均一性解析

京都大学

金谷 利治

化学研究所

大学院工学研究科

利用研究促進部

155 エポキシ樹脂の重合誘起相分離と架橋構造

群馬大学

総合科学研究機構

高世代デンドロンを有する両親媒性デンドリマー
会合体の構造解析

152

岩瀬 裕希

日本原子力研究開発機構

アミロイド線維形成初期過程中間体のダイナミクス
藤原 悟
Ⅱ

151

Satoru Fujiwara

Satoru Fujiwara

Masahiro Fujita

Hitoshi Endo

Tomokazu
Yoshimura

Koji Yoshida

Yoshiaki Takahashi

Yoshiaki Takahashi

Mitsuhiro Shibayama

Mitsuhiro Shibayama

Effect of network structure in lipid bilayers on bending modulus Norifumi Yamada

Molecular weight and radius of gyration of cellulose in 1buthyl-3-methylimidazorium chloride solution

Structure instability of thread-like micelle in shear banding
regionParticle Structure for Aqueous Acrylic Polymer Dispersion

Inhomogeneity of Phenolic Resins during Gelation Process

KENS

Kyusyu University

Kyusyu University

The University ofTokyo

The University ofTokyo

Kyoto University

Toshiji Kanaya

Polymerization Induced Phase Separation of Epoxy Resin and
Network Structure

Gunma University
Institute for Chemical
Research

Mitsuhiro Hirai

Comprehensive Research
Organization for Scienceand Society

Japan Atomic Energy
AgencyJapan Atomic Energy
AgencyRIKEN

Japan Atomic Energy
AgencyNara Women's
University

Fukuoka University

Toshiyuki Takamuku Saga University

Mechanism of insulin amyloid fibril formation as studied by small
Rintaro Inoueangle neutron scattering

Structure and dynamics of proteins under crowded polymer
conditions

Organization

Toshiyuki Takamuku Saga University

Name

Structure analysis of newly synthesized amphiphilic dendrimers
Hiroki Iwase
with high-generation dendrons in aqueous solution

量子ビーム応用 Dynamics of the intermediate structures of the early stages of
研究部門
the amyloid fibril formation II

量子ビーム応用 Relationship between the structural polymorphism and the
研究部門
dynamics of F-actin II

日本原子力研
究開発機構

150 F-アクチンの構造多形性と運動特性の相関Ⅱ

149

藤原 悟

量子ビーム応用 Mesoscopic Dynamics of Staphylococcal Nuclease in Aqueous
研究部門
Solution Investigated by Neutron Spin Echo Technique

大学院人間文化研究科

Phase separation of ionic liquids and surfactant mixtures

Alkali Electrolytes-Induced Phase Separation of AcetonitrileWater Mixtures

Aggregation of Imidazolium Nitrate Depending on Solvent
Polarities

Title

前田バイオ工学 Structural study on DNA coronal layer in DNA-functionalized
研究室
nanoparticle

日本原子力研究開発機構

奈良女子大学

理学部

大学院工学系
研究科

大学院工学系研究科

所属

独立行政法人
理化学研究所

遠藤 仁

DNA担持ナノ粒子におけるDNA密生相の構造解
藤田 雅弘
析中性子スピンエコー法を用いたStaphylococcal
148 nucleaseの水溶液中でのメゾスコピックダイナミク
ス研究

環境負荷低減を目指した新規ジェミニ型非イオン
吉村 倫一性界面活性剤のミセル特性

福岡大学

146 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

147

佐賀大学

高椋 利幸

アルカリ電解質が誘起するアセトニトリル 水混合溶液の相分離

145

佐賀大学

高椋 利幸

溶媒極性による硝酸イミダゾリウムの会合挙動の
相違

144

氏名

課題名

No.

Minoru Nakano

Satoshi Okabe

Structure and Dynamics of POPC Nanodiscs
Molecular understanding of the effect of electrolytes on phaseseparation and hydrophobic hydration in the aqueous solutionsof NIPA

大学院薬学研究科

量子ビーム応用 Relationship between the structural polymorphism and the
研究部門
dynamics of F-actin II

日本原子力研
究開発機構
日本原子力研
究開発機構
日本原子力研究開発機構

藤原 悟

175 F-アクチンの構造多形性と運動特性の相関Ⅱ

アミロイド線維形成初期過程中間体のダイナミクス
藤原 悟
Ⅱ重元素イオンを選択的に認識する配位子がつくる鈴木 伸一
逆ミセルの構造176

177

量子ビーム応用 Structure of Reverse Micelles Self-Assembled by Organic
研究部門
Ligands with Selective Recognition for Heavy Metal Ion.

量子ビーム応用 Dynamics of the intermediate structures of the early stages of
研究部門
the amyloid fibril formation II

量子ビーム応用 Mesoscopic Dynamics of Staphylococcal Nuclease in Aqueous
研究部門
Solution Investigated by Neutron Spin Echo Technique

日本原子力研究開発機構

Phase separation of ionic liquids and surfactant mixtures

Kyoto University

High Energy Research
Organization

Kyushu University

Kyoto University

Nara Institute of
Science andTechnology

Gunma University

The University ofTokyo

Hokkaido University

RIKEN

Organization

Shinichi Suzuki

Satoru Fujiwara

Satoru Fujiwara

Hitoshi Endo

Koji Yoshida

Japan Atomic Energy
AgencyJapan Atomic Energy
AgencyJapan Atomic Energy
AgencyJapan Atomic Energy
AgencyFukuoka University

KENS

Toshiyuki Takamuku Saga University

Toshiyuki Takamuku Saga University

Masaaki Sugiyama

Koichiro Sadakane

Mitsuhiro Hirai

Mitsuhiro Shibayama

Effect of network structure in lipid bilayers on bending modulus Norifumi Yamada

Alkali Electrolytes-Induced Phase Separation of AcetonitrileWater Mixtures

遠藤 仁

理学部

高エネルギー加 物質構造科学
速器研究機構 研究所

大学院工学系
研究科

Aggregation of Imidazolium Nitrate Depending on Solvent
Polarities

Investigation of Dynamics on Multi-domain Proteins

中性子スピンエコー法を用いたStaphylococcal
174 nucleaseの水溶液中でのメゾスコピックダイナミク
ス研究

山田 悟史

脂質二重膜の曲げ弾性係数に対する面内ネット
ワーク構造の影響

172

佐賀大学

大学院工学系研究科

原子炉実験所

福岡大学

高椋 利幸

アルカリ電解質が誘起するアセトニトリル 水混合溶液の相分離

171

佐賀大学

京都大学

Pressure-induced phase transition in a mixture ofwater/organic solvent/salt

Structure and dynamics of proteins under crowded polymer
conditions

IRT: iNSE(New issp Neutron Spin Echo Spectrometer)

173 イオン液体と界面活性剤の混合物の相分離現象 吉田 亨次高椋 利幸

溶媒極性による硝酸イミダゾリウムの会合挙動の
相違

杉山 正明

170

169 マルチドメインタンパク質の動的性質の解明

高エネルギー加 物質構造科学
速器研究機構 研究所

貞包 浩一朗

水/有機溶媒/塩混合溶液系の秩序構造に対する圧力の効果

168

大学院理学研
究院

九州大学

京都大学

N-isopropylacrylamide水溶液における相分離挙
岡部 哲士
動と疎水性水和への電解質効果の分子論的解明

中野 実

167

166 POPCナノディスクの構造とダイナミクス

The structure and dynamics of hybrid liposome with anticancer
Mikio Kataoka
function

物質創成科学研究科

奈良先端科学
技術大学院大学

抗ガン作用のあるハイブリッドリポソームの構造と揺らぎの観測165

片岡 幹雄

大学院工学研究科

群馬大学

高分子密集条件下におけるタンパク質の構造とダ平井 光博
イナミックス

164

物性研究所

Michihiro Furusaka

東京大学

IRT: mf-SANS(mini-focusing Small Angle Neutron Scattering
Instrument)

柴山 充弘

大学院工学研究科

Yoshie Otake

Name

163 iNSE（中性子スピンエコー分光器）IRT課題

北海道大学

IRT: ULS(Ultra Small Angle Scattering Instrument)

Title

古坂 道弘

理化学研究所所属

162 C1-3 小型集束型小角散乱装置 IRT課題

氏名

大竹 淑恵

課題名

161 ULS（極小角散乱装置）IRT課題

No.

東京大学

東北大学

AGNES（高分解能パルス冷中性子分光器）IRT課
山室 修
題
林 慶

金子 文俊

マルチフェロイック物質CuFe1-xMxO2 (M=Al,Mn)の中性子準弾性散乱

非晶性高分子の分子運動に関する超臨界二酸化炭素の影響

180

181

Title

194

中性子スピン位相コントラスト法による磁気ヒステリ
林田 洋寿
シス分布可視化技術の開発

田崎 誠司

日本原子力研
究開発機構

京都大学

京都大学

中性子スピン位相イメージングを用いた電流分布
田崎 誠司の可視化 III

192

193 冷中性子による全断面積測定

京都大学

MIEZE分光法を用いた量子井戸滞在時間の実時
日野 正裕
間測定

191

京都大学

京都大学

日野 正裕

東京大学

日野 正裕

MINE1（京大炉：多層膜中性子干渉計・反射率
計）IRT課題

190 2次元中性子集光デバイスの開発

189

山室 修

188 逆浸透膜表面における水のダイナミクス

東京電機大学

福岡大学

規則構造型メソポーラスカーボン中に閉じ込めた
山口 敏男
分子液体のダイナミクス

186

山室 憲子

福岡大学

山口 敏男

有機無機ハイブリッドメソポーラスシリカ中に閉じ込めた水とメタノールのダイナミクス

185

187 両性イオン-グリシンの水和構造とダイナミクス

新潟大学

メタノール水溶液における疎水性水和による水分丸山 健二子の拡散遅延効果

Masahiro Hino

Masahiro Hino

J-PARCセン
ター

Development of imaging technique of magnetic hysteresis
distribution with neutron spin phase contrast method

Measurment of total cross section for cold neutron

大学院工学研究科

Hirotoshi Hayashida

Seiji Tasaki

Visualization of electric current distribution using neutron spin
Seiji Tasaki
phase imaging III

Direct measurement of dwell time in quasi-bound state by mean
Masahiro Hinoof MIEZE spectroscopy

Development of 2D focusing supermirror device

IRT: MINE(Multilayer Interferometer and Refrectmeter for
Neutron) 1

Osamu Yamamuro

Noriko Yamamuro

Dynamics and hydration structures of aqueous solutions ofzwitterionic glycine
Dynamics of water on surface of reverse osmosis membranes

Toshio Yamaguchi

Toshio Yamaguchi

Kenji Maruyama

Dynamics of molecular liquids confined in ordered mesoporous
carbonDynamics of water and methanol confined in organic-inorganic
hybrid mesoporous silica

The retardation effect of hydrophobic hydration on diffusion
dynamics of water molecules in methanol aqueous solution

大学院工学研
究科

原子炉実験所

原子炉実験所

原子炉実験所

物性研究所

理工学部

理学部

理学部

理学部

Maiko Kofu

Systematic QENS study on dynamics of alkyl-chain inalkylimidazolium ionic liquids

物性研究所

184

Hiroshi Kitagawa

Control of Proton Conductivity in Porous Coordination
Polymers, M(OH)(bdc R)(M = Fe, Al, bdc = terephthalate, R =NH2, OH, (COOH)2)

大学院理学研究科

M(OH)(bdc R)(M = Fe, Al, bdc = terephthalate, R
182 = NH2, OH, (COOH)2)配位高分子の酸発生基に 北川 宏
京都大学
よるプロトン伝導性の制御
中性子準弾性散乱によるアルキルイミダゾリウム
183 系イオン液体におけるアルキル鎖運動の系統的 古府 麻衣子 東京大学
研究

Fumitoshi Kaneko

Kei Hayashi

Quasielastic neutron scattering of multiferroic CuFe 1-xMxO2(M=Al,Mn)
Influence of supercritical carbon dioxide on dynamical
properties of synthetic rubbers

Osamu Yamamuro

IRT: AGNES(Angle Focusing Cold Neutron Spectrometer)

Yohei Noda

Name

大学院理学研究科

大学院工学研
究科

物性研究所

量子ビーム応用
Dynamics of water in ion-channel of Nafion
研究部門

所属

大阪大学

日本原子力研
究開発機構

179

能田 洋平

ナフィオン膜イオンチャンネル中の水分子のダイ
ナミクス

178

氏名

課題名

No.

Japan Atomic Energy
AgencyKyoto University

Kyoto University

Kyoto University

Kyoto University

Kyoto University

The University of
Tokyo

Tokyo Denki
University

Fukuoka University

Fukuoka University

Niigata University

The University ofTokyo

Kyoto University

Osaka University

Tohoku University

The University of
Tokyo

Japan Atomic Energy
AgencyOrganization

京都大学

経路を完全分離するJamin型冷中性子干渉計の
開発と応用

197

京都大学

同志社大学

同志社大学

同志社大学

MIEZE分光法を用いた量子井戸滞在時間の実時
日野 正裕
間測定

中性子反射率法による潤滑下摩擦低減のための平山 朋子
金属基板上ポリマーブラシ層の膜厚・密度測定

中性子反射率法による疎水性表面上におけるア
平山 朋子
ルカン分子の密度測定

中性子反射率法による各種DLC被膜／潤滑油界
平山 朋子
面の構造解析

中性子反射率によるポリメチルメタクリレート薄膜におけるガラス転移温度の分布

199

200

201

202

203

九州大学

京都大学

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

イオン液体｜固体界面におけるイオン多層構造の中性子反射率測定による研究

206

207

大学院工学研究科

大学院工学研究院

原子炉実験所

化学研究所

化学研究所

理工学部

理工学部

理工学部

原子炉実験所

原子炉実験所

高等教育研究開発推進機構大学院工学研究院

原子炉実験所

所属

九州大学

京都大学

理化学研究所

川崎 真介

田中 敬二

208 偏極超冷中性子輸送ガイドの開発

209 混合液体と接触した高分子界面の凝集状態

中性子スピン位相イメージングを用いた電流分布
田崎 誠司の可視化 III

多層膜冷中性子干渉計による重力起因位相の精
関 義親
密測定

210

211

仁科加速器研究センター

大学院工学研究科

大学院工学研究院

高エネルギー加 素粒子原子核速器研究機構 研究所

京都大学

北口 雅暁

205 超冷中性子光学系のためのデバイス開発

西 直哉

井上 倫太郎 京都大学

204 ディップコート薄膜の熱的物性

井上 倫太郎 京都大学

京都大学

日野 正裕

198 2次元中性子集光デバイスの開発

九州大学

水と接触した多層積層高分子電解質膜の凝集状
藤井 義久
態

196

舟橋 春彦

京都大学

日野 正裕

氏名

MINE2（京大炉：多層膜中性子干渉計・反射率
計）IRT課題

課題名

195

No.

Masahiro Hino

Keiji Tanaka

Kawasaki Shinsuke

Naoya Nishi

Hisao Matsuno

Masaaki Kitaguchi

Rintaro Inoue

Precision measurement of gravitationally induced phase withmultilayer cold neutron interferometer

Yoshichika Seki

Visualization of electric current distribution using neutron spin
Seiji Tasaki
phase imaging III

Aggregation State of Interface between Polymers and Mixed
Non-solvents

Development of polarized Ultra-Cold Neutron transport

Neutron reflectivity measurements on the ionic multilayer
structures at ionic liquid|solid interface

Study of adsorbed proteins at the polymer/water interfaces

Development of optical devices for ultra cold neutrons

Thermal properties of dip-coat thin film

Rintaro Inoue

Structural Analysis of Interface of DLC/Lubricant by Means ofTomoko Hirayama
Neutron Reflectometry

Density of Alkane Molecules on Hydrophobic Surface Measured
Tomoko Hirayama
by Neutron Reflectometry

Thickness and Density of Polymer Brush Layer on Metal
Tomoko Hirayama
Surface under Lubrication Measured by Neutron Reflectometry

Distribution of glass transition temperature in poly(methyl
methacrylate) thin film studied by neutron reflectivity

Kyushu University

Kyoto University

Organization

RIKEN

Kyoto University

Kyushu University

KEK

Kyoto University

Kyushu University

Kyoto University

Kyoto University

Kyoto University

Doshisha University

Doshisha University

Doshisha University

Kyoto University

Kyoto University

Haruhiko Funahashi Kyoto University

Yoshihisa Fujii

Masahiro Hino

Name

Direct measurement of dwell time in quasi-bound state by mean
Masahiro Hinoof MIEZE spectroscopy

Development of 2D focusing supermirror device

Jamin-Type Cold-Neutron lnterferometer with Completely
Separated Two Paths

Aggregation State of Multi-layered Polymer Electrolyte inContact with Water

IRT: MINE(Multilayer Interferometer and Refrectmeter for
Neutron) 2

Title

東京大学

東京理科大学

東京理科大学

東京理科大学

フラストレート強磁性鎖におけるスピン・ネマティッ
益田 隆嗣
ク相関の検出
満田 節生

磁性イオン置換によりフラストレーションを制御したスピン誘導型強誘電体CuFeO2

スピン格子結合系CuFeO2のスピン波分散関係の満田 節生
一軸応力変化

スピン誘導型強誘電体CuFeO2における磁気ピエ
満田 節生
ゾ効果

時間分割中性子散乱測定による磁気構造変化過元屋 清一郎 東京理科大学
程の実時間追跡

217

218

219

220

221

名古屋大学

CeTe3およびTbTe3における量子臨界現象および
佐藤 憲昭
磁性と超伝導の相関の研究

226

228

強誘電体の相転移機構（変位型及び秩序 無秩序型）に関する統一的理解の確立
重松 宏武

山口大学

山口大学

東京理科大学

三角格子反強磁性体CuCrO2磁性と誘電性に対中島 多朗
する一軸圧力効果

225

重松 宏武

東京理科大学

マルチフェロイックCuFeO2における2軸圧力による
中島 多朗
磁気・強誘電ド メイン配向制御

224

227 Rb2MoO4における多形転移とソフトフォノン

東京理科大学

多段メタ磁性体Ca3Co2O6における磁気構造の長茂吉 武人
時間変化へのdisorderの効果

元屋 清一郎 東京理科大学

223

222 磁気構造の長時間変化と磁性原子希釈効果

山口大学

藤原 哲也

216 EuRu2P2の磁気構造解析

山口大学

藤原 哲也

215 重い電子系新物質Ce2Pt3Ge5の磁気構造解析

山口大学

藤原 哲也

東北大学

新規T'構造銅酸化物Pr2-xCaxCuO4における磁気
藤田 全基
相関のホールドープ効果

214 EuCo2P2の磁気構造解析

213

東京大学

氏名

吉沢 英樹

課題名

212 HQR（高分解能中性子散乱装置）IRT課題

No.

Magnetic structure analysis of EuRu 2P2

大学院理工学
研究科

教育学部

教育学部

大学院理学研
究科

理学部

理学部

理工学部

理工学部

理工学部

理学部

理学部

理学部

Takatsugu Masuda

Tokyo University of
Science
Nagoya University

Taro Nakajima

Biaxial-pressure control of multiferroic domain structure in
spin-driven ME multiferroic CuFeO 2

Uniaxial pressure effect on magnetic and dielectric properties ofTaro Nakajima
a triangular lattice antiferromagnet CuCrO 2
Study on the quantum criticality and correlation of magnetismand superconductivity in CeTe 3 and TbTe3

Hirotake Shigematsu Shimane University

Hirotake Shigematsu Shimane University

Establishment of the unified explanation about the phasetransition mechanism (displacive and order-disorder type) in
Ferroelectrics

Tokyo University of
Science

Polymorph Transition and Soft Phonon in Rb 2MoO4

Noriaki Sato

Tokyo University of
Science

Taketo Moyoshi

Effect of Disorder on the Long-Time Variation of Magnetic
Structure in a Multistep Metamagnet Ca 3Co2O6Tokyo University of
Science
Kiyoichiro Motoya

Dilution effect of magnetic atoms on the long-time variation ofmagnetic structure

Tokyo University of
ScienceTokyo University of
Science
Kiyoichiro Motoya

Setsuo Mitsuda

spin-mediated piezoelectric effect in spin-driven magnetoelectric multiferroic CuFeO 2

Tokyo University of
ScienceTokyo University of
Science

The University ofTokyo

Yamaguchi University

Yamaguchi University

Yamaguchi University

Tohoku University

The University ofTokyo

Organization

Real-time observation of magnetic structural change by meansof time-resolved neutron scattering experiments

Setsuo Mitsuda

Spin wave dispersion relation in a spin-lattice coupled system
CuFeO2 under uni-axial stress

Cross-correlation in spin-driven ME multiferroic CuFeO 2 with
Setsuo Mitsuda
Mn-magnetic doping

Detection of spin nematic correlation in frustrated
ferromagnetic chain

Tetsuya Fujiwara

Magnetic structure analysis of new heavy fermion material
Ce2Pt3Ge5

大学院理工学
研究科

物性研究所

Tetsuya Fujiwara

Magnetic structure analysis of EuCo 2P2

大学院理工学研究科

Tetsuya Fujiwara

Masaki Fujita

Hole-doping effect on spin correlations in a new cuprate oxideof T'-structured Pr 2-xCaxCuO4

金属材料研究所

Name

Hideki Yoshizawa

Title

IRT: HQR(High Q Resolution Triple Axis Spectrometer)

物性研究所

所属

佐賀大学

埼玉大学

atacamite型四面体構造Mn2(OD)3Cl, Mn2(OD)3Br
鄭 旭光のスピン揺らぎ

空間反転対称性を欠く系CeNiC2の複雑な磁気構
片野 進
造

238

239

東京大学

上床 美也

10GPa級中性子散乱実験用圧力発生装置の開
発

秋田大学

245

留野 泉

243 (Sr,Ca)VO3のフォノン

秋田大学

広島大学

留野 泉

242 NdCoO3の格子ダイナミックス

山口大学

中性子回折を用いたNd5Ge3における磁場誘起非蔦岡 孝則
可逆反強磁性 強磁性転移の研究 II

繁岡 透

241 TbCu2Si2の複雑な磁気相図

244

茂吉 武人

240 三角格子系NaxNiO2の磁気構造
東京理科大学

佐賀大学

逐次相転移を示した三角格子物質Co2(OD)3Brの
鄭 旭光
フラストレーション磁性とスピン揺らぎ

237

安井 幸夫

名古屋大学

秋田大学

ダブルペロブスカイト酸化物Sr2YRuO6および
Sr2CrNbO6の磁気構造

留野 泉

234 FeTe1-xSex系のフォノン

秋田大学

236

留野 泉

233 混晶系Ba1-xCaxTiO3のフォノン

秋田大学

名古屋大学

留野 泉

232 立方晶BaTiO3のフォノンの温度依存性

秋田大学

マルチフェロイック物質YBaCuFeO5の非自明な磁
安井 幸夫
気構造

留野 泉

231 秩序型ペロブスカイトCaCu3Ti4O12のフォノン

山口大学

山口大学

235

繁岡 透

230 成分分離逐次磁気転移の研究

氏名

繁岡 透

課題名

229 PrRh2Ge2の逐次磁気転移

No.

物性研究所

大学院教育学研究科

教育文化学部

教育文化学部

Yoshiya Uwatoko

Takanori Tsutaoka

Neutron diffraction studies for Magnetic field induced
irreversible antiferromagnetic to ferromagnetic transition in
Nd5Ge3 II
Development of high pressure apparatus for elastic neutron
scattering experiments

Izumi Tomeno

Izumi Tomeno

Toru Shigeoka

Phonons in (Sr,Ca)VO3

Lattice dynamics of NdCoO3

Complex magnetic phase diagrams of TbCu 2Si2

Susumu Katano

Complex magnetic structures of the non-centrosymmetricsystem CeNiC2

大学院理工学研究科

Xu-Guang Zheng

Investigation of spin fluctuations in atacamite-type pyrochlore
compounds Mn 2(OD)3Cl and Mn2(OD)3Br

Taketo Moyoshi

Xu-Guang Zheng

Study of the frustrated magnetism and spin fluctuations intriangular-lattice Co 2(OD)3Br

Magnetic structure of a triangular system Na xNiO2

Yukio Yasui

Yukio Yasui

Non-trivial Magnetic Structure of Multiferroic System
YBaCuFeO5
Magnetic Structure of double perovskite oxides Sr 2YRuO6 andSr2CrNbO6

Izumi Tomeno

Izumi Tomeno

Izumi Tomeno

Izumi Tomeno

Toru Shigeoka

Toru Shigeoka

Name

Phonons in FeTe 1-xSex

Phonons in (Ba,Ca)TiO3

Temperature dependence of phonons in cubic BaTiO 3

理工学部

大学院理工学研究科

大学院工学系
研究科

大学院工学系
研究科

大学院理学研究科

大学院理学研究科

教育文化学部

教育文化学部

教育文化学部

Phonons in ordered perovskite CaCu 3Ti4O12

Study of component s-separated magnetic transition

大学院理工学研究科
教育文化学部

Successive magnetic transitions of PrRh 2Ge2

Title

大学院理工学研究科

所属

The University ofTokyo

Hiroshima University

Akita University

Akita University

Yamaguchi University

Tokyo University of
Science

Saitama University

Saga University

Saga University

Nagoya University

Nagoya University

Akita University

Akita University

Akita University

Akita University

Yamaguchi University

Yamaguchi University

Organization

青山学院大学

幾何学的フラストレート系(Mn,Mg)Cr2O4における高阪 勇輔
らせん磁気構造のクロスオーバー

大山 研司

HERMES（東北大金研：中性子粉末回折装置）
IRT課題

261

土井 貴弘

光田 暁弘

磁場中中性子回折によるYbPdの金属的電荷秩
序構造の研究260

262 希土類 遷移金属複合酸化物の磁気構造

九州大学

光田 暁弘

極低温単結晶中性子回折によるYbPdの磁気構造および金属的電荷秩序の検証

259

北海道大学

東北大学

九州大学

東北大学

広島大学

高温超伝導体LSCOの磁気励起における磁性不松浦 直人
純物Ni置換効果の研究II

松村 武

257 Ce0.5La0.5B6における磁気八極子秩序の検証

258

小山 佳一

256 Mn2Sbのスピン揺らぎの研究鹿児島大学

青山学院大学高阪 勇輔

254 CrX (Cr=Si, Ge) のカイラル磁気構造の検証

255

青山学院大学東北大学

マルチフェロイックBiMn2O5の非磁性不純物置換
木村 宏之
による強誘電性と磁性の制御

252

253 MPO4 (M: 遷移金属) のカイラル磁気構造の検証 高阪 勇輔

東北大学

マルチフェロイック物質(Bi,Eu)Mn2O5の圧力誘起
木村 宏之
磁気秩序と強誘電性

九州工業大学251

飯久保 智

高い反強磁性転移温度をもつ鉄系化合物
TlFe2Se2の磁性

250

平賀 晴弘

東北大学

東北大学

高精度測定によるFe-LSCOの異方的磁気秩序ピークの起源の研究

248

249 反強磁性金属Mn3Siにおける高温スピン励起

九州工業大学高エネルギー磁気励起測定によるBi2201の磁気
榎木 勝徳
励起分散の研究

247

藤田 全基

東北大学

氏名

AKANE（東北大金研：三軸型中性子分光器 ）IRT
大山 研司
課題

課題名

246

No.

Magnetic structure of lanthanide transition metal oxides

大学院理学研究院

Yoshihiro Doi

Kenji Ohoyama

IRT: HERMES(Kinken Powder Diffractometer for High
Efficiency and High Resolution MEasurementS)
金属材料研究所

Akihiro Mitsuda

Masato Matsuura

Akihiro Mitsuda

Study on metallic charge order of YbPd by single-crystal
neutron diffraction at lowest temperature

Kagoshima University

Aoyama-Gakuin
University

Aoyama-Gakuin
University

Aoyama-Gakuin
University

Hokkaido University

Tohoku University

Kyushu University

Kyushu University

Tohoku University

Takeshi Matsumura Hiroshima University

Study on metallic charge order in YbPd by neutron diffraction
in a magnetic field

大学院理学研究院

大学院理学研究院

Investigation of Ni-impurity doping effect on magnetic
excitations in high-Tc superconductor LSCO II

Magnetic Octupole Order in Ce 0.5La0.5B6

大学院先端物質科学研究科
金属材料研究所

Experimental study of spin fluctuation on Mn 2Sb

大学院理工学研究科

Keiichi Koyama

Yusuke Kousaka

Crossover between conical and screw magnetic phase in(Mn,Mg)Cr2O4

理工学部

Yusuke Kousaka

Yusuke Kousaka

Chiral Magnetism in MPO4 (M: Transition Metal)

Hiroyuki Kimura

Control of ferroelectricity and magnetism by non-magnetic
impurity substitution in Multiferroic BiMn 2O5

Tohoku University

Tohoku University

Hiroyuki Kimura

Pressure induced magnetic order and ferroelectricity inmultiferroic (Bi,Eu)Mn2O5

Chiral Magnetic Structure in CrX (X=Si, Ge)

理工学部

理工学部

多元物質科学研究所

多元物質科学研究所

Kyushu Institute ofTechnology

Tohoku University

Tohoku University

Kyushu Institute ofTechnology

Tohoku University

Organization

Neutron scattering study of high temperature anti-ferromagnet
Satoshi Iikubo
TlFe2Se2

Haruhiro Hiraka

High-temperature spin excitations in antiferromagnetic metal
Mn3Si

金属材料研究所
大学院生命体
工学研究科

Masaki Fujita

Masanori Enoki

Kenji Ohoyama

Name

Origin of anisotropic magnetic peak in Fe-LSCO studied withhigh resolution measurement

Study of magnetic excitation dispersion in Bi2201 by
measurement of high-energy excitation

IRT: AKANE(Advanced Kinken Neutron Spectrometer)

Title

金属材料研究所

大学院工学研
究院

金属材料研究
所

所属

岩手大学

東北大学

九州大学

東京大学

松川 倫明

高温超伝導体LSCOの格子における磁性不純物
松浦 直人
Ni置換効果の研究
光田 暁弘

電子ドープ型マンガン酸化物の磁化の反転と磁気構造

極低温粉末中性子回折によるYbPdの磁気構造および金属的電荷秩序の検証

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

277

278

279

青山学院大学青山学院大学

京都大学

276

高阪 勇輔

新規カイラル磁性体MPO4 (M: 遷移金属) の磁気
高阪 勇輔
構造解析

275 新規カイラル磁性体CrGeの磁気構造解析

274

小林 洋治

273 チタン酸化物のマグネシウム還元

京都大学

東北大学

混晶系マルフチフェロイクス(1-x)BiFeO3-xPbTiO3
木村 宏之のMPB相近傍の結晶構造と磁気構造

271

小林 洋治

京都大学

異常高原子価鉄を持つ(Ba,Sr)FeO3の磁気構造と陰山 洋相境界の解明270

272 (CuCl)LaNb2O7-xFxの構造決定

京都大学

陰山 洋

269 層間酸素を含んだ鉄平面４配位酸化物

京都大学

九州工業大学茨城大学

陰山 洋

高い保磁力を有する水素化FeCoナノ粒子の結晶
飯久保 智
構造

伊賀 文俊

268 ペロブスカイト型チタン酸水素化物の構造267

266 近藤合金Yb1-xTmxB6の低温磁気秩序構造

井手本(Bi,Na)(Ti,Nb,Ta)O3系無鉛圧電セラミックスの結晶構造に与える分極処理の影響

265

東京理科大学

東京大学

萩原 雅人

擬一次元鎖フラストレート磁性体SrCo2V2O8の中
性子回折

264

康

京都大学

氏名

ニオブ酸リチウム型構造をもつ遷移金属酸化物の
藤田 晃司
磁気構造

課題名

263

No.

The structure of perovskite type titanium oxyhydride

Square Planar Iron Oxide with Apical Oxygen

大学院工学研究科
大学院工学研究科

Yusuke Kousaka

Yusuke Kousaka

Reduction of titanates with Mg
Magnetic Structure Analysis in New Chiral Magnetic
Compounds MPO 4 (M: Transition Metal)
Magnetic Structure Analysis in New Chiral Magnetic
Compounds CrGe

大学院工学研
究科

物性研究所

大学院理学研
究院

金属材料研究
所

工学部

理工学部

Aoyama-Gakuin
University

Aoyama-Gakuin
University

Kyoto University

Kyoto University

Tohoku University

Kyoto University

Kyoto University

Kyoto University

Kyushu Institute ofTechnology

Akihiro Mitsuda

Yusuke Nambu

Crystal and magnetic structures of the bilayer triangularantiferromagnet Fe 2Ga2S5

Masato Matsuura

The University ofTokyo

Kyushu Univerisity

Tohoku University

Michiaki Matsukawa Iwate University

Study on metallic charge order of YbPd by powder neutron
diffraction at lowest temperature

Investigation of Ni-impurity doping effect on crystal structure
in high-Tc superconductor LSCO

Magnetization reversal and magnetic structure in electron
doped manganites

Yoji Kobayashi

Structural determination of (CuCl)LaNb 2O7-xFx

大学院工学研究科

理工学部

Hiroyuki Kimura

Crystal and magnetic structure in MPB phase of multiferroic
composite (1-x)BiFeO3-xPbTiO3多元物質科学研究所

Yoji Kobayashi

Hiroshi Kageyama

Hiroshi Kageyama

Hiroshi Kageyama

Satoshi Iikubo

Investigation for Magnetic Structure and Phase Boundary of(Ba,Sr)FeO3 with an Unusually High Valence State of Iron

大学院工学研究科

Crystal structure of a hydrogenated FeCo nano-particle withhigh coercive force

Fumitoshi Iga

Magnetic structure of Kondo alloy Yb 1-xTmxB6 at low
temperatures

Ibaraki University

Tokyo University of
ScienceYasushi Idemoto

Effect of poling process on crystal structure of(Bi,Na)(Ti,Nb,Ta)O3-based lead-free piezoelectric ceramics

Kyoto University

Organization

The University ofTokyo

Koji Fujita

Name

Neutron diffraction of quasi-1D frustrate magnetism SrCo 2V2O8 Masato Hagihala

Magnetic structure of transition metal oxides with lithium
niobate-type structure

Title

大学院生命体
工学研究科

理学部

理工学部

物性研究所

大学院工学研究科

所属

氏名

金属絶縁体転移を示す導電性フラストレート系
R2Ir2O7における磁気構造と内部磁場の研究

巨大な負の熱膨張を示すペロブスカイトの結晶・
磁気構造解析

東京工業大学

東京工業大学

格子間酸素を利用したイオン伝導性セラミックスの八島 正知
結晶構造とイオン拡散経路

295

八島 正知

東京工業大学

層状ペロブスカイト型酸化物の結晶構造とイオン
八島 正知
拡散経路

294

296 排ガス浄化触媒の構造物性

東京工業大学

八島 正知

東京大学

愛媛大学

北海道大学

東北大学

鉛フリー圧電体ニオブ酸銀系材料の結晶構造と
誘電性

山室 修

山田 幾也

分島 亮

富安 啓輔

手塚 慶太郎 宇都宮大学

293

292 イミダゾリウム系イオン液体の短・中距離構造

291

290 層状鉄オキシカルコゲナイドの磁気構造

289

288 クロム複硫化物の結晶構造と磁気転移

東京工業大学

スピン2籠目格子反強磁性体Cs2LiMn3F12の基底
田中 秀数
状態

287

Ikuya Yamada

Makoto Wakeshima

Keisuke Tomiyasu

Keitaro Tezuka

Crystal structure and diffusion pathway of oxide ions in ionic
conducting ceramics via interstitial oxide ions
Crystal structure catalysis correlation of exhaust gas catalysts

大学院理工学研究科

Crystal structure and ion conduction pathway of layered
perovskite-type oxides

Crystal structure and dielectric properties of Pb-freepiezoelectric silver niobate-based materials

Masatomo Yashima

Masatomo Yashima

Masatomo Yashima

Masatomo Yashima

Short- and intermediate-range structures of imidazolium-based
Osamu Yamamuro
ionic liquids

大学院理工学研究科

大学院理工学研究科

大学院理工学
研究科

物性研究所

Crystal and Magnetic Structure Analysis of Perovskites
Showing Giant Negative Thermal Expansion

Magnetic structures of layered iron oxychalcogenides

大学院理学研究院
大学院理工学研究科

Magnetic structure and internal magnetic field in conductive
frustrated system R 2Ir2O7 with metal-insulator transition

Crystal Structures and Magnetic Transitions of Chromium
Complex Sulfides

大学院工学研究科
大学院理学研究科

Ground state of spin-2 kagome-lattice antiferromagnet
Cs2LiMn3F12

大学院理工学
研究科

Hidekazu Tanaka

Shigeomi Takai

大学院工学研究科

Defect Structure of CaWO4-based Oxice Ion Conductor with
Oxygen Vacancies

鳥取大学

酸素空孔をもつCaWO4系酸化物イオン伝導体の
高井 茂臣
欠陥構造

286

Miwako Takahashi

Crystal and magnetic structures of Co xNbS2

大学院数理物質科学研究科Yoshikazu Tabata

Takayuki Suehiro

285 層状金属硫化物CoxNbS2の結晶構造と磁気構造 高橋 美和子 筑波大学

Analyses of site preference in cerium silicon nitride phosphorsfor solid-state lighting
Non-magnetic ordered states in novel itinerant-electron
frustrated magnets Fe 6W6C

田畑 吉計

新しいタイプの遍歴電子フラストレート磁性体
Fe6W6Cにおける非磁気的秩序相284

多元物質科学研究所

Yue Jin Shan

Taku J Sato

Magnetic Structure of Antiferromagnetic Trimer 2b 3CuCl 2
2H2O
Synthesis and crystal structure analysis of a novel multipleoxide with lithium and tellurium

Yusuke Nambu

Name

Crystal and magnetic structures of a new S = 3/2 triangularantiferromagnet

Title

大学院工学研
究科

東北大学

末廣 隆之

次世代固体照明用セリウムシリコンナイトライド系
蛍光体におけるサイト選択性の解明

283

大学院工学研
究科

物性研究所

物性研究所

所属

京都大学

宇都宮大学

リチウムイオンを含む新規複合酸化物の合成と結
単 躍進
晶構造解析

東京大学

東京大学

282

佐藤 卓

新しいS = 3/2三角格子反強磁性体の結晶構造と
南部 雄亮
磁気構造

課題名

281 反強磁性三量体2b 3CuCl2 2H2Oの磁気構造

280

No.

Tokyo Institute ofTechnology

Tokyo Institute ofTechnology

Tokyo Institute ofTechnology

Tokyo Institute ofTechnology

The University of
Tokyo

Ehime University

Hokkaido University

Tohoku University

Utsunomiya University

Tokyo Institute ofTechnology

Tottori University

University of Tsukuba

Kyoto University

Tohoku University

Utsunomiya University

The University ofTokyo

The University ofTokyo

Organization

課題名

八島 正知

氏名

東京大学

マルチフェロイック物質Ca2Fe1.5Al0.5O5の磁気構
造の解明

312

313 二糖類水和物の結晶構造

東京理科大学

三角格子反強磁性体CuCrO2磁性と誘電性に対中島 多朗
する一軸圧力効果(4軸)311

高橋 美和子 筑波大学

佐賀山 基

東京理科大学

磁性イオン置換によりスピンフラストレーションを制
満田 節生御したスピン誘導型強誘電体CuFeO2（４軸）

東京大学

310

益田 隆嗣

309 アルカリ超酸化物KO2の磁気構造

岩手大学

塑性歪みを加えたPt3Fe反強磁性体における強磁小林 悟
性の発現機構

307

山口大学

東北大学

マルチフェロイックBiMn2O5の非磁性不純物置換
木村 宏之
による強誘電性と磁性の制御

306

増山 博行

東北大学

マルチフェロイック物質(Bi,Eu)Mn2O5の圧力誘起
木村 宏之
磁気秩序と強誘電性

305

308 KH2AsO4の低温構造と相転移

東北大学

野田 幸男

304 FONDER（中性子4軸回折装置）IRT課題

理化学研究所

Satoru Kobayashi

Hiroyuki Mashiyama Yamaguchi University

Mechanism of ferromagnetism in plastically deformed Pt 3Fe
antiferromagnet
Low Temperature Structure and the Phase Transition of
KH2AsO4

工学部
大学院理工学研究科

Effect of uniaxial pressure on a triangular lattice
antiferromagnet CuCrO 2 (4-circle neutron diffraction)
Study of magnetic structure in multiferroic material
Ca2Fe1.5Al0.5O5
Crystal structure of hydrate disaccharide

大学院新領域
創成科学研究科
大学院数理物質科学研究科

Magnetic structures in spin frustration system CuFeO 2 withmagnetic doping

理学部

理学部

物性研究所

Miwako Takahashi

Hajime Sagayama

Taro Nakajima

Setsuo Mitsuda

Takatsugu Masuda

Hiroyuki Kimura

Control of ferroelectricity and magnetism by non-magnetic
impurity substitution in Multiferroic BiMn 2O5

多元物質科学研究所

Magnetic structure of Alkali superoxide KO 2

Hiroyuki Kimura

Pressure induced magnetic order and ferroelectricity inmultiferroic (Bi,Eu)Mn2O5

多元物質科学研究所

University of Tsukuba

The University of
Tokyo

Tokyo University of
ScienceTokyo University of
Science

The University ofTokyo

Iwate University

Tohoku University

Tohoku University

Tohoku University

Noda Yukio

IRT: FONDER(Four-circle-Off-center-type Neutron
Diffractometer)

多元物質科学研究所

RIKEN

National Institute ofAdvanced Industrial
Science and Technology

Magnetic structure analysis on electron-doped VO 2

Daisuke Okuyama

Katsuhiro Nomura

National Institute ofAdvanced Industrial
Science and Technology

National Institute ofAdvanced Industrial
Science and Technology

Saga University

Saga University

Tokyo Institute ofTechnology

Organization

基幹研究所

ユビキタスエネ Neutron diffraction study of platinum containing perovskite
ルギー研究部門 oxides

エネルギー技術 Relationship between crystal structure and superconductivity in
Chul-Ho Lee
研究部門
Fe-based superconductors

産業技術総合研究所
産業技術総合研究所

先進製造プロセ Neutron Powder Diffraction Studies of Lithium-ion Battery
ス研究部門
materials

産業技術総合
研究所

奥山 大輔

野村 勝裕

Xu-Guang Zheng

Study of geometric frustration in triangular-lattice
M2(OD)3X[M:Cu,Ni,Cu etc; X:Cl,Br,I] Ⅱ

大学院工学系
研究科

佐賀大学

Norihito Kijima

Xu-Guang Zheng

Masatomo Yashima

Name

Study of geometric frustration in a new triangular lattice series
compounds M(OD)X[M:Cu,Ni,Cu etc; X:Cl,Br,I]

Structure-property correlation of visible-light responsive
metal-oxynitride photocatalysts

Title

大学院工学系
研究科

大学院理工学
研究科

所属

佐賀大学

東京工業大学303 電子ドープVO2の磁気構造解析

白金含有ペロブスカイト酸化物の中性子回折測定李 哲虎301 鉄系超伝導体の結晶構造と超伝導の相関

302

木嶋 倫人

300 リチウムイオン電池材料の粉末中性子回折

新しい三角格子系物質M(OD)X [M:Cu,Ni,Co
298 etc; X:Cl,Br,I] の幾何学的フラストレーション磁性 鄭 旭光と磁気構造の解明
三角格子系水酸塩化物M2(OD)3X[M:Cu,Ni,Cu
299 etc; X:Cl,Br,I]の幾何学的フラストレーション磁性 鄭 旭光と磁気構造の解明Ⅱ

297 可視光応答型酸窒化物光触媒の構造物性

No.

課題名

金子 耕士

金子 耕士

上床 美也

316 β-パイロクロア化合物における非調和熱振動

317 アクセサリーIRT課題

東京大学

物性研究所

量子ビーム応用
Anharmonic thermal motion in beta-pyrochlore compounds
研究部門

日本原子力研究開発機構

Structure and magnetism in Pt(1-x)Mn x (x=0.11~0.14)

Title

量子ビーム応用
Anharmonic thermal motion in type I clathrate compounds
研究部門

大学院数理物質科学研究科

所属

日本原子力研究開発機構

高橋 美和子 筑波大学

氏名315 I型クラスレートにおける非調和熱振動

314 Pt(1-x)Mnx(x=0.11~0.14)の規則構造と磁性

No.

Yoshiya Uwatoko

Koji Kaneko

Koji Kaneko

Miwako Takahashi

Name

The University of
Tokyo

Japan Atomic Energy
AgencyJapan Atomic Energy
AgencyUniversity of Tsukuba

Organization

低温スピン偏極走査トンネル顕微鏡の開発

表面薄膜超伝導体の探索

極性結晶のイオン散乱分光

AgPdCu合金圧力セルを用いた磁場中比熱測定 河江 達也

有機伝導体の圧力効果

多重極限関連装置の調整

Ce化合物の単結晶試料評価とその圧力効果

3

4

5

6

7

8

9

片野 進

糸井 充穂

梅原 出

13 中性子回析に用いる圧力装置の開発

14 擬一次元有機物質の圧力下物性研究

15 高圧下の比熱測定装置の開発

新しい１２２化合物の単結晶成長の試みと圧力効
池田 伸一
果

藤原 直樹

11 圧力下NMR測定法に関する開発

12

巨海 玄道

10 磁性体の圧力効果

藤原 哲也

高橋 博樹

村田 惠三

大西 剛

坂本 一之

山田 豊和

林 伸彦

二次元超伝導の渦糸に関する理論研究

2

氏名

He-4He希釈冷凍機を用いた走査トンネル顕微鏡 河江 達也の改良と極低温スピン偏極STMの開発

3

課題名

1

No.

嘱託研究員（Commission Researcher）

Development of very Low-temperature spin-polarized STM
with a 3He-4He dilution refrigerator
Theoretical study on vortices in two-dimensional
superconductors
Development of spin-polarized scanning tunneling microscopeat low temperatures
Search for surface/thin film superconductors

大学院工学研究院
ナノ科学・材料研究センター
大学院工学研究科
大学院融合科
学研究科

Title

横浜国立大学

日本大学

埼玉大学

産業技術総合研究所

京都大学

久留米工業大
学

山口大学

日本大学

大阪市立大学

九州大学

Effect of Pressure on the Ce Compounds

大学院理工学
研究科

Gendo Oomi

Tetsuya Fujiwara

Hiroki Takahashi

Keizo Murata

Tatsuya Kawae

Tsuyoshi Ohnishi

Susumu Katano

Miho Itoi

Developments of high pressure cell for neutron diffraction
Study on pressure induced superconductivity of quasi organic
conductor

大学院理工学
研究科

工学部

Development of apparatus for specific heat measurements underIzuru Umeharahigh pressure

Shinichi Ikeda

ナノエレクトロニ
Pressure effect of new materials
クス研究部門

医学部

Chiba University

Osaka Prefecture
University

Kyushu University

Organization

Yokohama National
University

Nihon University

Saitama University

National Institute ofIndustrial Science andTechnology

Kyoto University

Kurume Institute ofTechnology

Yamaguchi University

Nihon University

Osaka City University

Kyushu University

National Institute forMaterials Science

Kazuyuki Sakamoto Chiba University

Toyokazu Yamada

Nobuhiko Hayashi

Tatsuya Kawae

Name

大学院人間・環Development of NMR measurement method under high pressure Naoki Fujiwara
境学研究科

Effect of pressure on the Magnetic Materials

Adjustment of Cubic Anvil apparatus

Effect of pressure on the organic conductor

大学院理学研究科
文理学部

Development of pressure cell for specific heat measurements
under magnetic field

大学院工学研究院

物質・材料研究 国際ﾅﾉｱｰｷﾃｸﾄ
Ion scattering spectroscopy of polar crystals
機構
ﾆｸｽ研究拠点

千葉大学

千葉大学

大阪府立大学

九州大学

所属

平成２４年度 共同利用課題一覧（後期） Joint Research List (2012 Latter Term)量子ビーム応用 Ultra high resolution photoemission study on heavy fermion
部門
uranium compounds

日本原子力研究開発機構

高エネルギー加 物質構造科学
速器研究機構 研究所

31 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

32 レーザーPEEMによる磁性体の研究
小野 寛太

基礎工学部

東京理科大学

Study on magnetism by laser PEEM

High-resolution photoemission study on quasi crystals

Photoemission study on organic compounds

田村 隆治

東京理科大学理工学部

30 準結晶の高分解能光電子分光

Photoemission study on vanadium oxides

大学院自然科
学研究科

金井 要

岡山大学

29 有機化合物の光電子分光

ultra-high resolution study on strongly correlated materials

大学院自然科
学研究科

江口 律子

Research on electron state of molecular crystals using
photoemission spectroscopy

大学院基礎工学研究科

28 酸化バナジウムの高分解能光電子分光

岡山大学

大阪大学

Angle-resolved photoemission study on high Tc cuprate

エコトピア科学研究所

横谷 尚睦

光電子分光法を用いた各種分子性結晶の電子状
木須 孝幸
態の研究及び装置の低温化

名古屋大学

Ultra-high resolution photoemission spectroscopy on Fe-based
Teppei Yoshidasuperconductor

大学院理学系
研究科

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

Chiba University

Kagawa University

Tohoku Gakuin
University

National Institute forMaterials Science

National Institute forMaterials Science

Organization

Kanta Ono

Shinichi Fujimori

Ryuji Tamura

Kaname Kanai

Ritsuko Eguchi

Takayoshi Yokoya

Takayuki Kisu

High Energy
Accelerator ResearchInstituteJapan Atomic Energy
AgencyTokyo University of
ScienceTokyo University of
ScienceOkayama University

Okayama University

Osaka University

Tsunehiro Takeuchi Nagoya University

Takahiro Shimojima

Laser-ARPES on Fe superconductor

大学院工学系
研究科

Kyoko Ishizaka

Atsushi Fujimori

The development of time-resolved photoemission using 60eV
laser

Ultra-high resolution photoemission spectroscopy on high Tc
superconductor

大学院理学系
研究科

Makoto Nakajima

大学院工学系
研究科

Study of spin order control by pulsed terahertz radiation

理学部

27 高分解能光電子分光による強相関物質の研究

26

竹内 恒博

25 Bi系超伝導体の角度分解光電子分光

東京大学

吉田 鉄平

24 鉄ニクタイドの高分解能光電子分光

東京大学

下志万 貴博 東京大学

60-eVレーザーを用いた時間分解光電子分光の
石坂 香子
開発

東京大学

23 鉄系超伝導体のレーザー光電子分光

2221 高温超伝導体の高分解能光電子分光

藤森 淳

千葉大学

20

テラヘルツパルス電磁波によるスピン秩序の制御
中嶋 誠
の研究

Makoto Isoda

教育学部

Effect of Pressure on the Electrical Resistivity of Heavy Fermi
on Compounds

香川大学

礒田 誠

19 重い電子系物質における圧力下電気抵抗測定

Takeshi Kanomata

Investigation of magnetic properties for 3d transitionintermetallic compounds under pressure

東北学院大学鹿又 武

18 3d遷移金属化合物の圧力下における磁気特性

Takashi Naka

Development of the magnetometer

名嘉 節

TskehikoMatsumoto

Name

物質・材料研究機構

Title

The development of the pressure equipment using NiCrAl

所属
物質・材料研究機構

17 磁化測定装置の開発

氏名

松本 武彦

課題名

16 NiCrAlを用いた圧力装置の開発

No.

高分解能光電子分光による酸化バナジウムの研
究

小野 寛太

木村 真一

後藤 俊治

〃

高輝度光源ビームラインにおける分光光学系の
設計・開発

48

49

光電子顕微鏡による磁性ナノ構造物質の磁化過木下 豊彦
程47 高輝度極紫外ビームラインの設計・評価

46

高輝度光科学
研究センター

自然科学研究機構

分子科学研究所

Design of the new undulator beamline at Spring-8〃

Design and characterization of brilliance VUV beamline

高エネルギー加 物質構造科学
速器研究機構 研究所

Research and development of a new photoelectron spin
detector

Design and case study for the high-resolution atoms- andmolecules-spectroscopy beamline at the Super SOR facility

Research and development of soft X-ray undulator beamline

Shunji Goto

Shinichi Kimura

Kanta Ono

Toyohiko Kinoshita

Taichi Okuda

Kenji Ito

Kenta Amemiya

Hiroshi Kondoh

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

Magnetization in process of magnetic nano structure by PEEM

放射光科学研究センター

理工学部

Koichi Akimoto

Kohei Yoshimatsu

Motohiko Nakamura

Hidenori Fujiwara

Akira Sekiyama

Mario Okawa

Takeshi Nakagawa

Masaharu
Matsunami

Shunsuke Tsuda

Name

Analysis of strain field near the surface of semiconductors by
surface-sensitive x-ray diffraction

Angle-resolved photoemission study of the interfacial states oftransition-metal oxides

Study of circular dichroism of photoemission on FeSi

Study on vanadium oxides by high resolution Photoemission

高輝度光科学
研究センター

広島大学

高エネルギー加 物質構造科学
速器研究機構 研究所

高輝度光源計画における直入射ビームラインおよ伊藤 健二
びその利用計画の検討

44

奥田 太一

高エネルギー加 物質構造科学
速器研究機構 研究所

雨宮 健太

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

43

45 光電子スピン検出器の開発・研究

慶應義塾大学

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

42

理学部

日本女子大学

X線回折法による表面近傍の半導体微小格子ひ秋本 晃一
ずみ解析に関する研究

41

大学院理学系
研究科

理科教育講座大学院基礎工
学研究科

東京大学

奈良教育大学

大阪大学

Study on heavy Fermion materials by time-resolved
Photoemission

大学院基礎工学研究科

角度分解光電子分光法による遷移金属酸化物の吉松 公平
表面/界面電子状態の研究

中村 元彦

藤原 秀紀

Time resolved Photoemission on Mn compounds

理学部

40

39 鉄シリコンの円２色性光電子分光の研究

38

関山 明

37 時間分解光電子分光による重い電子系の研究

大阪大学

大川 万里生 東京理科大学

分子科学研究所

Observation of magnetic domain structures by ultra-highresolution photoemission electron microscopy

自然科学研究機構

分子科学研究所

超高空間分解能光電子顕微鏡による磁区構造観
中川 剛志
察36 Mn化合物の時間分解光電子分光

35

34 ４ｆ電子系物質の高分解能光電子分光

Photoemission study on 4f materials

津田 俊輔
自然科学研究
機構

Title

松波 雅治

所属

Laser-Photoemission Study on Oxide Films

氏名
物質・材料研究 若手国際研究
機構
拠点

課題名

33 レーザー光電子分光による酸化物薄膜の研究

No.

Japan Synchrotron
Radiation Institute

Institute for Molecular
ScienceHigh Energy
Accelerator ResearchInstituteJapan Synchrotron
Radiation Institute

Hiroshima University

High Energy
Accelerator ResearchInstituteHigh Energy
Accelerator ResearchInstitute

Keio University

Japan Women's
University

The University of
Tokyo

Nara University of
Education

Osaka University

Osaka University

Tokyo University of
Science

Institute for Molecular
Science

Institute for Molecular
ScienceNational Institute forMaterials Science

Organization

Study of magnetic properties by time-resolved soft X-ray
spectroscopy

大学院理学研究科

Upgrade of ULS system

大学院工学研究院

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

58

東北大学

東北大学

東北大学

木村 宏之

中性子散乱装置のアップグレードと共同利用研究
藤田 全基
の推進
大山 研司

平賀 晴弘

田畑 吉計

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

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

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

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

62

63

64

65

66

京都大学

東北大学

東北大学

岩佐 和晃

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

61

東北大学

野田 幸男

北海道大学

中性子散乱装置FONDER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

金子 純一

60

59 中性子極小角散乱実験装置のアップグレード

大学院工学研究院

超高分解能軟X線発光分光による水素吸蔵合金
関場 大一郎 筑波大学
中の水素の波動関数の局在性に関する研究

57

北海道大学

数理物質系

産業技術総合研究所

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

56

古坂 道弘

Study on the localization of Wave functions of hydrogen atom inhydrogen storage alloys using ultrahigh resolution soft X-ray
Daiichiro Sekiba
emission spectroscopy
Development of a compact focusing small-angle neutron
scattering instrument and application research using theMichihiro Furusaka
instrument

物質創成科学研究科

奈良先端科学
技術大学院大学

二次元表示型スピン分解光電子エネルギー分析
大門 寛
器の開発

55

大学院工学研究科

金属材料研究所

金属材料研究所

金属材料研究所

多元物質科学研究所

大学院理学研究科

多元物質科学研究所

Junichi Kaneko

Daisuke Asakura

Hiroshi Daimon

Kenji Ohoyama

Masaki Fujita

Hiroyuki Kimura

Kazuaki Iwasa

Progress of the joint research by using the neutron scattering
instruments

Yoshikazu Tabata

Implementation of the research plan under the cooperation-use
Haruhiro Hiraka
program after upgrading neutron scattering instruments

Propelling the inter university research cooperation

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

Improvement of neutron monochromator and control programfor four circle neutron diffractometer FONDER

Structural studies of strongly correlated electron systems byneutron scattering method and instrumental development

Upgrading of neutron diffractometer FONDER and contributing
Yukio Noda
to user collaboration program

エネルギー界面 Study on the electronic property of electrode materials for Li技術グループ ion batteries by soft X-ray absorption/emission spectroscopy

Development of 2D display type spin resolved photoelectronenergy analyzer

Hiroshima University

Tokyo Institute ofTechnology

Kyoto University

Tohoku University

Tohoku University

Tohoku University

Tohoku University

Tohoku University

Tohoku University

Hokkaido University

Hokkaido University

University of Tsukuba

Nara Institute of
Science andTechnology
National Institute ofIndustrial Science andTechnology

Kazuyuki Sakamoto Chiba University

大学院融合科学研究科

千葉大学

高輝度軟X線を利用する光電子顕微鏡装置の設
坂本 一之
計・開発

54

Akio Kimura

Kenichi Ozawa

広島大学
Research and designing of a PEEM spectrometer for highbrilliance soft X ray

Japan Synchrotron
Radiation Institute

Organization

High Energy
Hiroshi Kumigashira Accelerator ResearchInstituteHaruhiko Ohashi

Name

木村 昭夫

53 軟X線時間分解分光実験による磁性研究

Study of carrier dynamics in photocatalysis materials by timeresolved photoemission spectroscopy

大学院理工学研究科

時間分解光電子分光法による光触媒材料のキャ
小澤 健一
リアダイナミクス研究52

東京工業大学

Study of electronic states in strongly correlated materials withhigh brilliant soft-Xray.

高エネルギー加 物質構造科学
速器研究機構 研究所

高輝度軟X線を利用した強相関物質の電子状態
組頭 広志
研究

Design of the new undulator beamline at Spring-8

51

大橋 治彦

高輝度光科学
研究センター

Title

高輝度光源ビームラインにおける分光光学系の
設計・開発

所属

50

氏名

課題名

No.

大学院理工学研究科
理学部

中性子分光器を用いた強相関電子系物質の微視桑原 慶太郎 茨城大学
的研究高度化した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

冷中性子スピン干渉計の応用とMINEビームライン
田崎 誠司
の整備

69

70

71

九州大学

琉球大学

首都大学東京77 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

三軸分光器を用いた極端条件下における物質科
阿曽 尚文
学研究の実施
川端 庸平

伊藤 晋一

大竹 淑恵

非イオン界面活性剤水溶液におけるベシクル系の高分子添加効果

7879

80 中性子散乱研究計画の実施と共同利用の推進

81 冷中性子干渉イメージング装置開発研究

東北大学

東北大学

高度化した三軸分光器を用いた共同利用の推進佐藤 卓とスピンダイナミクスの研究高度化した三軸分光器を用いた強相関電子系物
南部 雄亮
質の研究

82

83

理化学研究所高エネルギー加速器研究機構山口大学

中性子散乱用高圧セルの開発および高圧下にお藤原 哲也
ける中性子散乱実験

76

京都大学

北口 雅暁

75

〃

京都大学

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

74

京都大学

杉山 正明

73 C1-3 ULS極小角散乱装置IRT

富山大学

中野 実

京都大学

72 膜貫通ペプチドのフリップフロップ誘起能の評価

横山 淳

茨城大学

金属材料研究所

東北大学

多元物質科学研究所

Study of strongly correlated electron systems using advanced
triple-axis spectrometers

Yusuke Nambu

Taku Sato

Promoting user program and investigating spin dynamics using
triple-axis spectrometers

多元物質科学研究所

Shinichi Itoh

Youhei Kawabata

Yoshie Otake

propelling the inter university research cooperation

Effect of polymer addition to vesicles in a nonionic surfactant
solution

Naofumi Aso

Yoshiaki Takahashi

Tetsuya Fujiwara

Masaaki Kitaguchi

仁科加速器セン Research and Development of interferometric imaging
ター
instruments for cold neutron

大学院理工学
研究科

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

Studies on structural change of soft matter under flow field

先導物質化学研究所
理学部

Neutron Scattering Experiments under High Pressure andDevelopment of High Pressure Cell for Neutron Scattering〃

大学院理工学研究科

原子炉実験所

原子炉実験所

Masahiro Hino

Masaaki Sugiyama

Development of micro-focusing small-angle neutron scattering
spectrometer
Improvement of MIEZE spectrometer and cold neutronreflectometer and interferometer

Minoru Nakano

Induction of Phospholipid Flip-Flop by Transmembrane
PeptidesSeiji Tasaki

Makoto Yokoyama

Keitaro Kuwahara

Masato Matsuura

大学院医学薬学研究部（薬学）
原子炉実験所

Organization

Tohoku University

Tohoku University

RIKEN

High Energy
Accelerator ResearchInstituteTokyo Metropolitan
University

University of the
Ryukyus

Kyushu University

Yamaguchi University

Kyoto University

Kyoto University

Kyoto University

University of Toyama

Kyoto University

Ibaraki University

Ibaraki University

Tohoku University

Takeshi Matsumura Hiroshima University

Name

Development of cold neutron spin interferometry andimprovements of MINE beam line

Executing user program and study of material science with theadvanced triple-axis spectrometers

Neutron scattering study of strongly correlated electron
systems by using neutron triple-axis spectrometers

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

Promotion of joint research after the upgrade of neutron
scattering instruments

Title

大学院工学研究科

大学院先端物質科学研究科

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

広島大学

68

松村 武

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

所属

67

氏名

課題名

No.

〃

9

12

町田 一成

安井 幸夫

岩佐 泉

青木 悠樹

新しいスピンフィルターを用いた超流動ヘリウム３
山口 明
スピン流制御の研究11 重い電子系超伝導体の対称性の決定

磁気フラストレートした一次元量子スピンをもつ
CuO2リボン鎖系の磁場相図

固体ヘリウム４の非古典的回転慣性の遮断効果

8

10

〃

7

石川 沙羅

横山 淳

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

6

兵庫県立大学

岡山大学

明治大学

神奈川大学

東京工業大学

茨城大学

茨城大学

New spin filter for spin current control in superfluid helium-3

Determination of pairing symmetry in heavy fermion
superconductors

大学院自然科
学研究科
大学院物質理学研究科

Magnetic Phase Diagram of CuO2 Ribbon Chain System withFrustrated One-Dimensional Quantum Spins〃

Kyoto University

Organization

Tokyo Institute ofTechnology

National Institute ofIndustrial Science andTechnology

Tohoku University

Organization

Iwate University

Sara Ishikawa

Makoto Yokoyama

Kouhei Sakano

Akira Yamaguchi

Kazushige Machida

Yukio Yasui

Izumi Iwasa

University of Hyogo

Okayama University

Meiji University

Kanagawa University

Tokyo Institute ofTechnology

Ibaraki University

Ibaraki University

Iwate University

Shalamujiang Simayi Iwate University

Yoshiki Nakanishi

Masahito Yoshizawa Iwate University

Yutaka Sasaki

Name

Blocking effect of Non classical rotational momentum inertia for
Yuki Aoki
Solid Helium 4〃

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

理工学部

理学部

大学院総合理
工学研究科

大学院理工学
研究科

理学部

〃

岩手大学

大学院工学研
究科

坂野 幸平

〃

5

〃

大学院工学研究科〃

中西 良樹
シャラムジャン
岩手大学
スマイ

Ultrasonic measurements of strongly correlated systems inpulsed magnetic field

大学院工学研究科〃

Texture dynamics of Rotating Superfluid 3He

Title

低温物質科学
研究センター所属

Jun-ichi Yamaura

元素戦略研究セ Crystal systhesis and the structural properties pf transition
ンター
metal compounds

大学院工学研
究科

岩手大学

京都大学

東京工業大学

Yasuo Narumi

Name

Eiji Hosono

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

Title

エネルギー技術 Study on the electronic property of electrode materials for Li研究部門
ion batteries by soft X-ray absorption/emission spectroscopy

金属材料研究
所

所属

岩手大学

吉澤 正人

4

強相関伝導系のパルス磁場中の超音波測定

2

佐々木 豊

〃

回転超流動ヘリウム３のテクスチャーダイナミクス
の研究

1

氏名

3

課題名

No.

一般研究員（General Researcher）

山浦 淳一

産業技術総合研究所

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

85

86 遷移金属化合物の結晶合成と構造物性

東北大学

氏名

強磁場量子ビーム科学のためのパルスマグネット
鳴海 康雄
の開発

課題名

84

No.

氏名

成島 哲也

渡辺 量朗

機械的応力のシリコン表面化学への影響に関する研究

表面プラズモンを支持する金属単結晶表面の作成と解析 (2)29

東京理科大学

自然科学研究機構

大学院総合化学研究科

分子科学研究所

先端科学研究指導者育成ユニット

Fabrication and analysis of single crystal metal surfaces
supporting surface plasmons (2)Effect on Silicon Surface Chemistry under External MechanicalStressChemical modification of graphene

Precise measurement of Cu valence and hole density for Pbsubstituted Bi2201 superconductor

応用セラミックス Structural and material-property characterization of multi研究所
component oxide films with nano-scale phase separation

エムデイ ザキール ホサイ 群馬大学
ン

28

27 グラフィン表面の化学修飾

Ground-state phase diagram of the checkerboard Hubbard
model at 1/4 filling〃

北日本新エネル
Research of the energy materials for solar cell application
ギー研究所

工学部総合教育大学院自然科
学研究科

大学院理工学研究科

神戸 士郎

Pb置換Bi2201相超伝導体のCu価数とホール濃度の精密測定26

東京工業大学

熊本大学

Kumamoto University

Kumamoto University

Hosei University

Kyoto University

The University ofTokyo

Kyoto University

Kyoto University

Tokyo Metropolitan
University

Tokyo Metropolitan
University

University of Hyogo

Organization

Kazuo Watanabe

Tetsuya Narushima

Md. Zakir Hossain

Shiro Kambe

Yuji Matsumoto

Kenji Itaka

Tokyo University of
Science

Institute for Molecular
Science

Gunma University

Yamagata University

Tokyo Institute ofTechnology

Hirosaki University

Yasufumi Yamashita Nihon University

Keita Kiyoshima

Masaki Matsuda

Studies on organic thin film devices

大学院自然科
学研究科

Kazuhiro Nawa

Ayako Shinozaki

Kazuhiro Nawa

Kazuyoshi
YoshimuraMeasurements of Low Temperature Properties of Organic Thin
Kiyoshi Torizuka
Films

Investigation of a low-temperature magnetic phase in a quasitwo-dimensional magnet Sr 2VO4 using a purified sample

Dissolution of quartz into hydrogen fluid under high pressure
and temperature〃

Anisotropy of a SDW and a nematic correlations in onedimensional frustrated magnets

Tomohiro Taniguchi

理工学部

大学院理学研究科

大学院理学系
研究科

大学院理学研究科

大学院理学研究科〃

Hiroshi Takatsu

Magnetization measurements of the quantum spin liquid of
Tb2Ti2O7

大学院理工学研究科
大学院理工学研究科

Naofumi KamadaName

New spin filter for spin current control in superfluid helium-3

Title

大学院物質理
学研究科

所属

山形大学

松本 祐司

24 太陽電池応用を目指したエネルギー材料の研究 伊高 健治

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

弘前大学

山下 靖文

1/4フィルド・チェッカーボードハバードモデルの基底状態相図

23

25

日本大学

清島 啓太

〃

22

熊本大学

松田 真生

21 有機薄膜素子の物性研究

法政大学

鳥塚 潔

京都大学

純良化試料を用いた擬二次元磁性体Sr2VO4の磁
那波 和宏
気低温相の解明1920 有機薄膜の低温物性測定

東京大学

高温高圧下における石英の水素流体への溶解メ
篠崎 彩子
カニズム

〃

17

京都大学

18

吉村 一良

一次元フラストレート磁性体におけるSDW相関とネマティック相関の異方性

16

首都大学東京

京都大学

谷口 智洋

〃

15

首都大学東京兵庫県立大学

那波 和宏

高津 浩

新しいスピンフィルターを用いた超流動ヘリウム３
鎌田 尚史
スピン流制御の研究課題名

14 量子スピン液体Tb2Ti2O7の磁化測定

13

No.

大河原 遊46 Dy2Ti2O7のスピンダイナミクスと磁気モノポール
高津 浩

林 佑弥

45

〃

松村 武

44 CeTeにおける圧力誘起四極子秩序と近藤効果〃

43

首都大学東京

広島大学

広島大学

山口大学

大学院理工学研究科

大学院先端物質科学研究科

大学院先端物質科学研究科

大学院理工学研究科

大学院理工学研究科

Spin dynamics and magnetic monopole in Dy 2Ti2O7〃

Pressure induced quadrupole order and Kondo effect in CeTe〃

Magnetic transitions of (Ho,Gd)Rh 2Si2 single crystal〃

マテリアルサイエンス研究科

〃

41

山口大学

〃

マテリアルサイエンス研究科

〃

40

繁岡 透

Low temperature scanning tunneling microscopy investigationsof epitaxial silicene

マテリアルサイエンス研究科

北陸先端科学
高村 由起子 技術大学院大学
北陸先端科学ライナー フ
技術大学院大リードライン
学
北陸先端科学
アントワーヌ
技術大学院大フロランス
学

エピタキシャルシリセンの低温走査トンネル顕微
鏡観察

39Electronic structure of graphene and silicene grown on
semiconductor substrates

大学院総合理工学研究科

Photoemission study of silicide of magnetic metals

東京工業大学42 (Ho,Gd)Rh2Si2単結晶の磁気転移

Kouhei Yamada

Tokyo Gakugei
University

Tokyo Gakugei
University

Kyushu University

Tokyo Gakugei
University

Tokyo Gakugei
University

Tokyo University of
ScienceOrganization

Yamaguchi University

Yamaguchi University

Japan Advanced
Institute of Scienceand Technology
Japan Advanced
Institute of Scienceand Technology
Japan Advanced
Institute of Scienceand Technology

Tokyo Institute ofTechnology

Yokohama National
University

Hiroshi Takatsu

Yuya Hayashi

Tokyo Metropolitan
University

Hiroshima University

Takeshi Matsumura Hiroshima University

Yu Okawara

Toru Shigeoka

Antoine
FLEURENCE

Rainer FRIEDLEIN

Yukiko Takamura

Kan Nakatsuji

Shinya Ohno

NHK Science andTime resolved spectroscopy of harmonics from nano-structures
Norikazu Kawamura Technology Researchon Cu surfaces
Laboratory〃

Preparing of carrier-doped Boron clusters and analysis by slow
Ikuzo Kanazawa
positron beam

中辻 寛

大学院工学研究院

Makoto Saito

Ikuzo Kanazawa

Kenta Nagai

Name

Formation of an epitaxial silicon-oxide ultrathin film on Mo andHiroshi Tochihara
SiC surfaces and STM/STS measurement〃

Analysis of structural defects in Al based icosahedral
quasicrystals and approximate crystals by slow positron beam

Fabrication and analysis of single crystal metal surfaces
supporting surface plasmons (2)Title

半導体基板上に成長したグラフェンおよびシリシ
ンの電子物性横浜国立大学

放送技術研究所

大学院教育学
研究科

自然科学系

大学院総合理工学研究院

大学院教育学
研究科

自然科学系

大学院総合化
学研究科

所属

38

大野 真也

日本放送協会37 磁性金属シリサイドの光電子分光

36

東京学芸大学金属／半導体表面上ナノ構造の形成とその非線
河村 紀一
形発光の時間分解測定

キャリアドープボロンクラスター物質の作製と陽電金沢 育三
子ビーム法による分析する。

34

九州大学

東京学芸大学

栃原 浩

Mo及びSiC上のエピタキシャル酸化シリコン超薄膜の作製とSTM/STS観察

33

東京学芸大学

東京学芸大学

東京理科大学

山田 浩平

齋藤 誠

〃

32

〃

金沢 育三

Al系準結晶及び近似結晶中の構造欠陥の陽電子ビーム法による分析

31

35

長井 健太

表面プラズモンを支持する金属単結晶表面の作成と解析 (2)

30

氏名

課題名

No.

蔵田 裕也49〃

太刀掛 勇哉 兵庫県立大学〃

63

兵庫県立大学

大阪大学

本山 岳

森 晶宣

新潟大学

62 圧力下磁場中点接合分光実験の試み

〃

61

廣瀬 雄介

東北大学

圧力下での磁気および価数ゆらぎが生み出すEu
本多 史憲
化合物の新しい電子状態の探索

〃

琉球大学

大阪大学

鹿児島大学

琉球大学

琉球大学

鹿児島大学

鹿児島大学

大貫 惇睦

〃

圧力下での磁気および価数ゆらぎが生み出すEu
杉山 清寛
化合物の新しい電子状態の探索

60

59

58

57

伊藤 昌和

田中 秀和

セリウム系磁性超伝導体における微小磁気モーメ
阿曽 尚文
ントの圧力下磁化測定II

56 ホイスラー化合物Fe2MnSiの圧力下電気抵抗率

55

54

折橋 広樹

53

〃

小山 佳一

52 Mn2-xCoxSbの高圧下磁気緩和

長谷川 貴大 山口大学

〃

51

山口大学

藤原 哲也

山口大学

山口大学

首都大学東京50 HoRh2Si2の単結晶育成

〃

藤原 哲也

48 EuRu2P2の高圧力下磁化測定

氏名

後藤 和基

課題名

47 Dy2Ti2O7のスピンダイナミクスと磁気モノポール

No.

〃
Single crystal growth of HoRh 2Si2〃

大学院理工学研究科
大学院理工学研究科
大学院理工学
研究科

Hidekazu Tanaka

Naofumi Aso

Hiroki Orihashi

Keiichi Koyama

Takahiro Hasegawa

Tetsuya Fujiwara

Yuya Kurata

Tetsuya Fujiwara

Kazuki Goto

Name

Yoshichika Onuki〃〃
Development of a new method of Point-Contact-Spectroscopy
under pressure〃

大学院理学研究科
大学院物質理学研究科
大学院物質理学研究科

Yuya Tachikake

Gaku Motoyama

Akinobu Mori

Yusuke Hirose

Investigation of exotic electronic properties of Eu compounds
Fuminori Honda
driven by magnetic and valence fluctuation under high pressure〃

Investigation of exotic electronic properties of Eu compounds
Kiyohiro Sugiyama
driven by magnetic and valence fluctuation under high pressure

Transport properties of Heusler alloy Fe 2MnSi under pressure. Masakazu Ito〃

Magnetization studies under pressure in Ce-based magnetic
superconductors with small magnetic moments II〃

大学院自然科
学研究科

金属材料研究所

理学部

大学院理学研究科

大学院理工学研究科

大学院理工学
研究科

理学部

大学院理工学研究科

Magnetic relaxation in Mn2-xCoxSb under high pressure

Magnetization measurements under high pressures in EuRu 2P2

大学院理工学研究科

大学院理工学研究科

Spin dynamics and magnetic monopole in Dy 2Ti2O7

Title

大学院理工学
研究科

所属

University of Hyogo

University of Hyogo

Osaka University

Niigata University

Tohoku University

University of the
Ryukyus

Osaka University

Kagoshima University

University of the
Ryukyus

University of the
RyukyusKagoshima University

Kagoshima University

Yamaguchi University

Yamaguchi University

Yamaguchi University

Yamaguchi University

Tokyo Metropolitan
University

Organization

〃

68

杉山 清寛

石田 一裕

村山 茂幸

〃

強磁性Ce化合物の高圧下における量子臨界点
の探索

〃

〃

〃

〃

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

〃

73

74

75

76

77

78

79

80

雨海 有佑

廣瀬 雄介

本多 史憲

大貫 惇睦

照屋 淳志

〃

72

内間 清晴

理学部

大学院自然科
学研究科

室蘭工業大学

室蘭工業大学

大阪大学

新潟大学

東北大学

琉球大学

大阪大学

琉球大学

〃

〃

大学院自然科
学研究科
大学院理学研究科

大学院工学研究科〃

Quantum phase transition and magnetism in the strongly
correlated Ce compounds and alloys〃

金属材料研究所

大学院工学研究科〃

Investigation of a quantum critical point of ferromagnetic Ce
compound under high pressure〃〃

Magnetism and transport properties of rare-earth intermetallic
compounds under high pressure〃

理学部

大学院理学研究科

大学院理工学
研究科

Yuichi Hiranaka

Ai Nakamura

Takao Nakama

Shigeki Manabe

Akihiro Mitsuda

Name

Yusuke Amakai

Shigeyuki Murayama

Kazuhiro Ishida

Yusuke Hirose

Fuminori Honda

Yoshichika Onuki

Kiyohiro Sugiyama

Atsushi Teruya

Kiyoharu Nakama

Takao Nakama

Daichi Takeda

Pressure effect of low-temperature properties of the rare-earth
Tomohito Nakano
compound.

〃

大学院理工学研究科
工学部〃

Transport properties of valence fluctuation compounds〃

Physical properties under high pressure of Eu compounds
performing valence transition and valence ordering

Title

大学院理工学
研究科

理学部

大学院理学府大学院理学研究院

所属

沖縄キリスト教短
総合教育系
期大学

琉球大学

希土類金属間化合物の高圧下における磁性と輸
仲間 隆男
送特性

71

新潟大学

武田 大地

〃

70

新潟大学

中野 智仁

琉球大学

琉球大学

琉球大学

九州大学

九州大学

69 希土類化合物における低温物性の圧力効果

平仲 裕一

仲村 愛

〃

眞鍋 栄樹

67

〃

65

光田 暁弘

仲間 隆男

価数転移及び価数秩序を示すEu化合物の高圧
下物性

64

氏名

66 価数揺動物質の高圧力中輸送特性の研究

課題名

No.

Muroran Institute ofTechnology

Muroran Institute ofTechnology

Osaka University

Niigata University

Tohoku University

University of the
Ryukyus

Osaka University

University of the
RyukyusOkinawa Christian
Junior College

University of the
RyukyusNiigata University

Niigata University

University of the
Ryukyus

University of the
Ryukyus

University of the
Ryukyus

Kyushu University

Kyushu University

Organization

氏名

阿曽 尚文

空間反転対称性のないCeTSi3(T=Rh,Ir) の圧力
下電気抵抗II

〃

〃

83

84

85

〃

88

川合 拓馬

室蘭工業大学

室蘭工業大学

青山 悠司

97

〃

中野 智仁

佐藤 由昌

96 新規希土類化合物の作成と圧力下物性

〃

新潟大学

新潟大学

九州大学

〃

93

川村 幸裕

室蘭工業大学95〃92

関根 ちひろ

九州大学

充填スクッテルダイト化合物LaFe4P12における超伝導の圧力効果91

長谷川 貴大 山口大学

山口大学

慶應義塾大学

足利工業大学慶應義塾大学

琉球大学

大学院自然科
学研究科

工学部

大学院工学府〃Magnetic properties under pressure of the new rare earth
compound〃Magnetization measurements in 3He temperature region forheavy fermion systems〃

大学院工学研究科
大学院工学研究院〃

Pressure Effect of Superconductivity on Filled Skutterudite
LaFe4P12〃

大学院工学研究科

大学院工学研究科

大学院理工学
研究科

Tomoya Tsuiki

Daisuke Takahashi

Keiya Shirahama

Hidekazu Tanaka

Yoshinao Takaesu

Naofumi Aso

Takuya Deguchi

Keiichi Koyama

Name

Yuji Aoyama

Tomohito Nakano

Yoshiaki Sato

Tatsuya Kawae

Takuma Kawaai

Yukihiro Kawamura

Chihiro Sekine

Takahiro Hasegawa

Development of opposed-anvil type high pressure apparatus for
Tetsuya Fujiwara
magnetization measurement〃

大学院理工学研究科
大学院理工学研究科〃

Rotation Effect on Supersolid Behavior of Solid 4He〃〃

Electrical resistivity under pressure of non-centrosymmetricmagnetic superconductors CeTSi3 (T=Rh,Ir) II〃

Precise magnetization measurement of narrow-gap
semiconductor FeSb 2 under high pressure

Title

共通課程

理工学部

大学院理工学
研究科

理学部

大学院理工学研究科

大学院理工学研究科

所属

沖縄キリスト教短
期大学

琉球大学

鹿児島大学

鹿児島大学

3
94 重い電子系物質における He温度領域での磁化 河江 達也
測定〃

磁化測定用対抗アンビル型高圧力発生装置の開
藤原 哲也
発

90

89

高橋 大輔

〃

87

立木 智也

白濱 圭也

86 固体ヘリウムの超流動的挙動に対する回転効果

田中 秀和

高江洲 義尚出口 拓也〃

狭バンドギャップ半導体FeSb2の高圧下精密磁化
小山 佳一
測定

課題名

82

81

No.

Niigata University

Niigata University

Kyushu University

Kyushu University

Muroran Institute ofTechnology

Muroran Institute ofTechnology

Muroran Institute ofTechnology

Yamaguchi University

Yamaguchi University

Keio University

Ashikaga Institute ofTechnology

Keio University

University of the
RyukyusOkinawa Christian
Junior College

University of the
RyukyusKagoshima University

Kagoshima University

Organization

氏名

〃

〃

114

田中 和彦

三好 正悟

超高圧プレスを用いた新規プロトニクス酸化物の山口 周
ソフト化学的合成法の検討

113

112

廣戸 孝信

111 正20面体準結晶およびその近似結晶の磁性

吉田 直史

丹羽 健

〃

109

高宮 健吾

110 新規遷移金属炭化物の高圧合成と物性評価〃

窒素デルタドープGaAs中の等電子トラップからの矢口 裕之
発光の光子相関測定

108

107

武田 さくら

安藤 正海

角度分析板厚と空間解像度に関する理論・実験研究

104

106 歪み半導体の表面近傍の歪み量の精密測定

片野 進

空間反転対称を持たない炭化物 CeNiC2の圧力下での磁気秩序の安定性

103

窪谷 茂幸

國松 貴之

〃

102

105 高N濃度(In)GaAsN系混晶薄膜の構造解析 (4)

石川 修六

三浦 康弘

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

100

101 超流動ヘリウム３ーA相の新奇渦状態の探索

新川 貴晃

〃

層状有機物質(BPDT-TTF)2I3の超高圧下新電子
谷口 弘三
相探索

課題名

99

98

No.

東京大学

東京大学

東京大学

東京理科大学

名古屋大学

埼玉大学

埼玉大学

埼玉大学

High pressure synthesis and characterization of new transition
metal carbides
Magnetic properties of icosahedral quasicrystals and theirapproximants

大学院工学研究科
大学院基礎工
学研究科〃〃

大学院工学系
研究科
大学院工学系
研究科

Oxide-Protonics materials synthesis by combined use of soft
chemical method and high pressure〃

大学院理工学研究科

大学院工学系
研究科〃

Photon correlation measurement of luminescence fromisoelectronic traps in nitrogen delta-doped GaAs

大学院理工学研究科

大学院理工学研究科

物質創成科学研究科

奈良先端科学
技術大学院大学

Precise measurement of Strain beneath the surface of strained
semiconductors

Structural analysis of higher-N-content (In)GaAsN films (4)大学院新領域
創成科学研究科

東京大学

Stability of magnetic ordering of the non-centrosymmetriccarbide CeNiC2 under high pressure
Theoretical and Experimental Study on Relation between
Thickness of Laue Angle Analyzer and Spatial Resolution

大学院理工学研究科〃

Investigation of novel quantum vortex of superfluid 3He-A

大学院理学研究科〃
Studies on Electrical Properties of Conductive LangmuirBlodgett Films under High Pressure

大学院理学研究科

NameOsaka City University

Toin University of
Yokohama

Saitama University

Saitama University

Organization

Kazuhiko Tanaka

Shogo Miyoshi

Shu Yamaguchi

Takanobu Hiroto

Ken Niwa

Naofumi Yoshida

Kengo Takamiya

Hiroyuki Yaguchi

Sakura Takeda

Shigeyuki Kuboya

Masami Ando

Susumu Katano

The University ofTokyo

The University ofTokyo

The University of
Tokyo

Tokyo University of
Science

Nagoya University

Saitama University

Saitama University

Saitama University

Nara Institute of
Science andTechnology

The University of
Tokyo

Tokyo University of
Science

Saitama University

Takayuki Kunimatsu Osaka City University

Osamu Ishikawa

Yasuhiro Miura

Takaaki Shinkawa

Search for novel electronic phase in a layered organic material,
Hiromi Taniguchi(BPDT-TTF)2I3 under ultra-high pressure

大学院工学研究科

大学院理工学研究科

大学院理工学
研究科

Title

総合研究機構東京理科大学

埼玉大学

大阪市立大学

大阪市立大学桐蔭横浜大学

埼玉大学

埼玉大学

所属

131 Tb2Ti2O7における量子スピン液体状態の研究
門脇 広明

松澤 光司

130

〃

門脇 広明

129 Tb2(Sn1-xTix)2O7におけるスピン液体状態の研究

首都大学東京首都大学東京首都大学東京東北大学〃
Quantum spin liquid in Tb 2Ti2O7

大学院理工学研究科
大学院理工学研究科

Spin liquid state in Tb 2(Sn1-xTix)2O7

大学院理工学
研究科

Hiroaki Kadowaki

Koji Matsuzawa

Hiroaki Kadowaki

Tokyo Metropolitan
University

Tokyo Metropolitan
University

Tokyo Metropolitan
University

Tohoku University

Masato Matsuura

Study of spin fluctuations in the itinerant antiferromagnet
Ni(SSe)2

University of the
Ryukyus

金属材料研究所

遍歴反強磁性体Ni(SSe)2における磁気励起スペク
松浦 直人
トラムの研究128

Naofumi Aso

Kagoshima University

Tohoku University

Kyoto University

Kyoto University

High Energy
Accelerator ResearchInstitute

Crystal Quality Evaluation of large single crystals for neutron
scattering

Hirotaka Manaka

Haruhiro Hiraka

Kei Asai

Subodh Ganesan
Potti

Kyoto University

The University ofTokyo

The University ofTokyo

The University ofTokyo

Muroran Institute ofTechnology

Muroran Institute ofTechnology

The University ofTokyo

Organization

Single crystal growth and physical properties of charge induced
Tetsuya Yokoo
low dimensional quantum spin systems

高エネルギー加 物質構造科学
速器研究機構 研究所

理学部

電荷注入された低次元量子スピン系の結晶育成
横尾 哲也
とその評価

琉球大学

Spin dynamics of triangular spin tubes

大学院理工学
研究科

127

阿曽 尚文

鹿児島大学

Development of high-quality, single-crystal neutron
monochromator

金属材料研究所

中性子散乱研究用大型単結晶試料の結晶性評
価

真中 浩貴

125 三角スピンチューブのスピンダイナミクス

東北大学

126

平賀 晴弘

124 高品質単結晶中性子モノクロメータの開発

京都大学

〃

淺井 啓

大学院工学研
究科

〃

123

〃

大学院工学研究科

スボード ガネ京都大学
サン ポッティ〃Kazuhiko Tanaka

Shogo Miyoshi

Shu Yamaguchi

Tomokazu Kawada

Chihiro Sekine

Doloksaribu Rolas
TimbulNameSynthesis and Characterization of Amorphous Oxides Based on
Yoji Kobayashi
Ion-exchangeable Layered Oxides

大学院工学研究科〃

大学院工学系
研究科

京都大学

〃

大学院工学系
研究科

イオン交換性層状酸化物を基にしたアモルファス
小林 洋治
酸化物の合成とキャラクタリゼーション

122

121

〃

120

東京大学

Stress-induced phase transformation of Fe-Zn alloy formed in
hot-dip process

大学院工学系
研究科

東京大学

三好 正悟

〃

119

東京大学

田中 和彦

山口 周

118 溶融亜鉛メッキ合金相の応力誘起変態

Search for new rare-earth pnictides with cage-like structure

室蘭工業大学

超伝導を示すAs系充填スクッテルダイト化合物の
川田 友和
探索

117

Search for As-based filled-skutterudite compounds showsuperconductivity

Oxide-Protonics materials synthesis by combined use of soft
chemical method and high pressure

Title

大学院工学研究科

大学院工学研究科

室蘭工業大学

超伝導を示すAs系充填スクッテルダイト化合物の関根 ちひろ探索116所属
大学院工学系
研究科

氏名

ドロクサリブ ロ
超高圧プレスを用いた新規プロトニクス酸化物のラス ティンブ 東京大学
ソフト化学的合成法の検討
ル

課題名

115

No.

蔵田 裕也134

長谷川 貴大 山口大学

廣井 政彦

光田 暁弘

浜野 卓

146 ホイスラー化合物Ru2-xFexCrSiの強磁場磁化

147 価数揺動Eu化合物の強磁場磁化過程

148

〃

稲垣 祐次

145 パルス強磁場下における比熱測定技術の開発

九州大学

九州大学

鹿児島大学

九州大学

九州大学

福井 博章

144

〃

九州大学

143 クロミック化合物の結晶粒径と磁気的性質の相関 浅野 貴行

〃

山口大学

東京理科大学142

櫻井 辰弥

東京理科大学

繁岡 透

〃

140

山崎 照夫

東京理科大学

東北大学

山口大学

山口大学

山口大学

山口大学

首都大学東京141 HoRh2Si2単結晶における磁化の角度依存〃

鉄系超伝導体Fe1+yTe1-xSxにおける酸素中アニー
矢口 宏
ルによる物性変化

139138

137 鉄系超伝導体111系の比熱測定

佐藤 卓

大河原 遊

136

〃

繁岡 透

135 多形性化合物TbIr2Si2の磁気転移

〃

藤原 哲也

133 重い電子系新物質Ce2Pt3Ge5の比熱測定

氏名

谷口 智洋

課題名

132 Tb2Ti2O7における量子スピン液体状態の研究

No.

〃

Magnetization in a pulsed magnetic field of valence fluctuating
Eu compounds

大学院理学研究院
大学院理学府

Masahiko Hiroi

Magnetization of Heusler compounds Ru 2-xFexCrSi in highmagnetic field
大学院理工学
研究科

Suguru Hamano

Akihiro Mitsuda

Yuji Inagaki

Hiroaki Fukui

Takayuki Asano

Takahiro Hasegawa

Toru Shigeoka

Specific heat measurements under pulsed high magnetic field〃

Correlation between grain size and magnetic property inchromic compound〃

Angular dependence of magnetization on a HoRh 2Si2 single
crystal

Tatsuya Sakurai

大学院工学研究院

大学院理学府大学院理学研究院

大学院理工学研究科

大学院理工学研究科〃

大学院理工学研究科

Teruo Yamazaki

Hiroshi Yaguchi

Progress of physical property by annealing in Fe-based
superconductor in Fe 1+yTe1-xSx〃

Taku SatoYu Okawara

Toru Shigeoka

Yuya Kurata

Specific heat measurement of the 111 systems among ironbased superconductors〃

Magnetic transition of polymorphic compounds TbIr 2Si2

理工学部

理工学部

多元物質科学研究所

大学院理工学研究科

大学院理工学研究科〃

Tetsuya Fujiwara

Specific heat measurement in new heavy fermion system
Ce2Pt3Ge5

大学院理工学研究科
大学院理工学
研究科

Tomohiro Taniguchi

Name

Quantum spin liquid in Tb 2Ti2O7

Title

大学院理工学研究科

所属

Kyushu University

Kyushu University

Kagoshima University

Kyushu University

Kyushu University

Kyushu University

Yamaguchi University

Yamaguchi University

Tokyo University of
ScienceTokyo University of
ScienceTokyo University of
ScienceTohoku University

Yamaguchi University

Yamaguchi University

Yamaguchi University

Yamaguchi University

Tokyo Metropolitan
University

Organization

藤井 裕

高田 晋弥

柏木 隆成

〃

〃

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

〃

152

153

154

155

小川 智矢

157

吉原 義浩

159

道岡 千城

遍歴電子メタ磁性体SrCo2P2周辺物質の強磁場
測定

〃

164

165

京都大学

小林 慎太郎 京都大学

谷口 一也

〃

163

大阪大学

大阪大学

複合極限装置のためのワイドボアパルスマグネッ
萩原 政幸
トの開発

162

京都大学

原口 祐哉

〃

161

京都大学

植田 浩明

関西大学

関西大学

関西大学

関西大学

筑波大学

筑波大学

福井大学

福井大学

福井大学

160 新規フッ化物フラストレート磁性体の強磁場磁性

〃

稲田 貢

158 金属ナノクラスターの磁化測定

〃

稲田 貢

156 金属ナノクラスターネットワークの磁気抵抗測定

鈴木 悠介

菊池 彦光

151 幾何学的フラストレート磁性体の磁化研究

静岡大学

中井 裕人

〃

150

氏名

海老原 孝雄 静岡大学課題名

149 希土類金属間化合物の強磁場物性研究

No.

大学院理学研究科

大学院理学研究科

極限量子科学
研究センター

極限量子科学
研究センター

大学院理学研究科

大学院理学研究科〃

High field magnetization of the itinerant electron metamagnet
SrCo2P2 and its family compounds〃

Development of a wide-bore pulse magnet for experimental
apparatus used under multiple extreme conditions〃

Magnetism of novel frustrated magnetic fluorides under verystrong magnetic field

Shintaro Kobayashi

Chihiro Michioka

Kazuya Taniguchi

Masayuki Hagiwara

Yuya Haraguchi

Hiroaki Ueda

Kyoto University

Kyoto University

Osaka University

Osaka University

Kyoto University

Kyoto University

Yoshihiro Yoshihara Kansai University〃

大学院理工学研究科

Kansai University

Mitsuru Inada

Tomoya Ogawa

システム理工学 Magnetic properties of metal nano-clusters under high部
magnetic field〃Kansai University

University of Tsukuba

大学院理工学
研究科

Yusuke Suzuki

Kansai University〃

University of Tsukuba

University of Fukui

University of Fukui

University of Fukui

Shizuoka University

Shizuoka University

Organization

システム理工学 Electronic transport properties of metal cluster networks underMitsuru Inada部
high-magnetic field

大学院数理物質科学研究科Shinya Takada

Yutaka Fujii

Hikomitsu Kikuchi

Hirohito Nakai

Takao Ebihara

Name

Study of the transport properties of topological insulator under
Takanari Kashiwagi
high magnetic fields.

〃

大学院工学研究科
数理物質系〃

Magnetization of the geometrically frustrated magnets〃

Physical Phenomena at high magnetic fields in rear earth
intermetallic compounds

Title

遠赤外領域開発研究センター

大学院工学研究科

大学院理学研究科

理学部

所属

遍歴電子メタ磁性体SrCo2P2周辺物質の強磁場
測定

166

野口 大介

176

渡部 晋太郎 琉球大学

〃

182

琉球大学

平川 先太郎 琉球大学

琉球大学

仲間 隆男

〃

EuNiSi3の圧力誘起価数転移の探索と低温異常の
仲間 隆男
解明

鹿児島大学

鹿児島大学

東京農工大学

東京農工大学

東京農工大学

東京農工大学

東京理科大学

九州工業大学181 立方晶 CeTSn3 (T=Ni, Rh) の高圧輸送特性

180

179

折橋 広樹

178

〃

小山 佳一

177 Mn3Siの超強磁場磁化測定

〃

太田 寛人

175 遍歴電子系磁性体の強磁場下での振る舞い

安藤 悠一

幾何学的フラストレート磁性体の強磁場下での振
香取 浩子
る舞い

173

〃

矢口 宏

パルス強磁場を用いたグラファイトの強磁場相の
研究

172

174

水鳥 雄斗

〃

171

松平 和之

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

170

九州工業大学

大学院理工学
研究科

理学部

大学院理工学
研究科

理学部

大学院理工学研究科

大学院理工学研究科

大学院工学府大学院工学府大学院工学府大学院工学研究院

理工学部

大学院工学府大学院工学研究院

自然科学

茨城工業高等専門学校

佐藤 桂輔

169 コバルト酸化物の磁気形状記憶効果

Keisuke Sato

Makoto Inagaki

Keisuke Sato

Masaki Imai

Name

Ibaraki National
College of Technology

Toyota Technological
Institute

Ibaraki National
College of Technology

Kyoto University

Organization

Hiroshi Yaguchi

Yuto Mizutori〃High pressure transport properties of cubic structure CeTSn 3(T=Ni, Rh)〃

Searching for pressure-induced valence transition andresolution of low temperature anomalies on EuNiSi 3〃High field magnetization measurement of Mn 3Si〃

Magnetic behavior of itinerant electronic magnets under highmagnetic field〃

Shintaro Watanabe

Takao Nakama

Sentaro Hirakawa

Takao Nakama

Hiroki Orihashi

Keiichi Koyama

Daisuke Noguchi

Hiroto Ohta

Yuichi Ando

Properties of geometrically frustrated magnets in high magnetic
Hiroko Katori
fieldsStudy of High Magnetic Field Phase in Graphite Using Pulsed
Magnetic Fields〃

University of the
Ryukyus

University of the
Ryukyus

University of the
Ryukyus

University of the
RyukyusKagoshima University

Kagoshima University

Tokyo University ofAgriculture andTechnology
Tokyo University ofAgriculture andTechnology
Tokyo University ofAgriculture andTechnology
Tokyo University ofAgriculture andTechnology

Tokyo University of
Science

Kyushu Institute ofTechnology

Transport and Magnetic Properties of Pyrochlore Iridates under
Kyushu Institute of
Kazuyuki MatsuhiraHigh Field Magnetic Field
Technology

Magnetic shape memory effect in cobalt oxide

Clarification of electron transport property and band structureof GaAsN

自然科学

茨城工業高等専門学校
大学院工学研究科

High-Field Induced Spin State Transition in Co perovskite

大学院理学研究科

High field magnetization of the itinerant electron metamagnet
SrCo2P2 and its family compounds

Title

京都大学

所属

豊田工業大学

佐藤 桂輔

今井 正樹

氏名

168 GaAsNの電子輸送特性およびバンド構造の解明 稲垣 充

167 LaCoO3系の強磁場誘起スピン転移の研究

課題名

No.

氏名

〃

195

大阪大学

大阪大学

強磁場下における酸化コバルト反強磁性相のバリ
寺井 智之
アント再配列現象の観察
萩原 政幸

東京大学

東京大学

大阪府立大学

大阪府立大学

大阪府立大学阿部 伸行〃

マルチフェロイック物質の低エネルギー励起状態
佐賀山 基
の研究

199 In2Ga2CuO7の単結晶合成

198

197

196

岩瀬 賢治

〃

194

奥 雄太

山口 博則

東北大学

許 皛（キョ
キョウ）

〃

192

193 低次元有機ラジカル磁性体の極低温磁化測定

仙台高等専門学校

伊藤 航

超強磁場を利用したNiMn基およびCoCr基合金の低温異常現象の観察および起源解明

191

兵庫県立大学満身 稔

部分酸化型一次元複核白金錯体の伝導挙動の
圧力依存性

山形大学

190

三浦 友也

山形大学

〃

Ni-Mn-Ga系強磁性形状記憶合金の磁化の圧力
安達 義也
依存性

東北学院大学

京都大学

神戸大学

神戸大学

神戸大学

189

188

187 Pd-Mn-Sn合金のマルテンサイト変態の圧力効果 岡田 宏成

186 量子ホール効果試料の作成

澤田 安樹

川向 希昂

185

〃

高橋 一志

スピンクロスオーバー伝導体に対する光照射効果
高橋 一志
の観測

課題名

184 スピンクロスオーバー錯体の誘電率測定

183

No.

Pressure Dependence of Electrical Conductivity of Partially
Oxidized One-Dimensional Diplatinum Complex〃

Pressure Dependence of Magnetization for the Ferromagnetic
Shape-Memory Alloys of Ni-Mn-Ga system

Pressure effect on martensitic transition in Pd-Mn-Sn alloy

Sample Preparation for Quantum Hall EffectOrganization

Growth of single crystals of In 2Ga2CuO7

極限量子科学
研究センター

Masayuki Hagiwara

Observation of variant rearrangement of CoO antiferromagnetic
Tomoyuki Teraiphase under high magnetic fieldNobuyuki Abe

Hajime Sagayama

Yuta Oku

Kenji Iwase

Hironori Yamaguchi

Xiao XU

Wataru Ito

Minoru Mitsumi

Tomoya Miura

Yoshiya Adachi

Hironari Okada

Anju Sawada

Kiko Kawamukai

Osaka University

Osaka University

The University ofTokyo

The University ofTokyo

Osaka Prefecture
University

Osaka Prefecture
University

Osaka Prefecture
University

Tohoku University

Sendai National
College of Technology

University of Hyogo

Yamagata University

Yamagata University

Tohoku Gakuin
University

Kyoto University

Kobe University

Kazuyuki Takahashi Kobe University

Kazuyuki Takahashi Kobe University

Name

大学院工学研究科〃

Research of low-energy exitations in multiferroics〃

大学院理学系
研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科〃

Magnetization measurements of organic low-dimensional
magnets at low temperature〃

大学院理学系
研究科

大学院理学系
研究科

大学院工学研究科

Observation and clarification of the origin of anomalous
マテリアル環境
behaviors at low temperature under strong magnetic field in工学科
NiMn based and CoCr based alloys

大学院物質理
学研究科

大学院理工学研究科

大学院理工学研究科

工学部

低温物質科学
研究センター〃

Permittivity measurements of spin-crossover complexes

大学院理学研究科
大学院理学研究科

Photo effect on spin crossover conductors

Title

大学院理学研
究科

所属

課題名

〃

211

池田 真実

萩原 政幸

大阪大学

大阪大学

東京工業大学

兵庫県立大学

埼玉大学

茨城大学

Fabrication of hydrophilic silicon nanocrystals and application
to functional devices

大学院理学研究科

極限量子科学
研究センター

〃

〃

3

〃

京都大学

大学院工学研
究科

山本 隆文

〃

大学院工学研究科

セドリック タッ京都大学
セル

Structural Transition in Ruddlesden-Popper Type Perovskite
oxidesTitle

大学院工学研
究科

所属

京都大学

氏名

Ruddlesden-Popper 型ペロブスカイト酸化物にお陰山 洋
ける構造相転移

課題名

2

1

No.

〃

Magnetization measurements on an S=2 one-dimensional
Heisenberg antiferromagnet at ultra-low temperatures

Kyoto University

Kyoto University

Organization

Osaka University

Osaka University

Tokyo Institute ofTechnology

University of Hyogo

Saitama University

Ibaraki University

The University ofTokyo

The University ofTokyo

Toho University

Toho University

Muroran Institute ofTechnology

Osaka University

Organization

Takafumi Yamamoto Kyoto University

Cedric Tassel

Hiroshi Kageyama

Name

Masami Ikeda

Masayuki Hagiwara

Kengo Oka

Seiichi Sato

Shinji Michimura

Fumitoshi Iga

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

Yukiko Fujiuchi

Takeshi Morita〃

Orientation controlled KN family piezoelectric material withhydrothermal synthesis powder

Shohei Yamamoto

Hiroshi Moriyama

Magnetic and Transport Properties of Fullereide Single
Crystals〃

Mitsuharu Nomoto

Akira Okutani

Name

Quantum phase transition and magnetism in the strongly
correlated Ce compounds and alloys

Growth of single crystals of In 2Ga2CuO7

Title

応用セラミックス Field Induced Spin-State Transition in BiCo Fe O
1-x
x 3
研究所

大学院物質理学研究科

研究機構科学
分析支援セン
ター

理学部

大学院新領域
創成科学研究科
大学院新領域
創成科学研究科

大学院理学研究科

理学部

大学院工学研究科

大学院理学研究科

所属

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

S=2一次元ハイゼンベルグ反強磁性体の極低温
磁化測定

210

岡 研吾

水溶性シリコンナノ結晶の作製と機能デバイスへ
佐藤 井一
の応用

209 BiCo1-xFexO3のパルス強磁場中スピン状態転移

208

道村 真司

207

〃

東京大学

東邦大学

東邦大学

室蘭工業大学大阪大学

藤内 由紀子 東京大学

伊賀 文俊

〃

配向制御されたニオブ酸カリウム系非鉛圧電材料
森田 剛に関する研究206 TmB4の磁気準周期秩序相における圧力効果

205

204

山本 翔平

〃

203

野本 光春

森山 広思

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

奥谷 顕

氏名

202 フラーライド単結晶の伝導性と磁性

201

200 In2Ga2CuO7の単結晶合成

No.

後藤 真人瀬戸 雄介

炭素質コンドライト隕石にみられる水質変成組織の微細組織観察〃〃

強相関系遷移金属酸化物の透過電子顕微鏡法
による研究

パイロクロア型希土類酸化物の単結晶育成と磁気
松平 和之
フラストレーションの研究

10

11

12

13

14

神戸大学

神戸大学

東京大学

九州工業大学

山口大学〃

大学院理学研究科

大学院工学研
究院

4

3

2

1

No.

氏名

秋月 信

東京大学

〃

佐野 恵二

東京大学

高温高圧水中における固体酸触媒反応の速度論
大友 順一郎 東京大学
的解析〃

高温高圧水中における固体酸塩基触媒反応の速大友 順一郎 東京大学
度論的解析

課題名
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科所属〃

Kinetic analysis of solid acid catalyzed reactions in sub- andsupercritical water〃

Kinetic analysis of solid acid and base catalyzed reactions in
sub- and supercritical water

Title

Single crystal growth and study of frustrated magnetism inpyrochlore rare-earth oxides

TEM study of strongly correlated transition metal oxidesystems〃

大学院理学研究科
大学院理工学
研究科〃

Microscopic characterization of aqueous alteration texture incarbonaceous chondrites

大学院理学研究科

大学院理学研究科〃

Investigation of the reaction mechanisms of diamondoid
synthesis by pulsed laser plasmas generated in supercriticalfluids by time-resolved spectroscopy〃

大学院新領域
創成科学研究科
大学院新領域
創成科学研究科

Ryuta Yoshii

Name

Kobe University

The University ofTokyo

The University ofTokyo

Kyoto University

Kyoto University

Kyoto University

Kyoto University

Organization

Keiji Sano

Junichiro Otomo

Makoto Akizuki

Junichiro Otomo

Name

Kazuyuki Matsuhira

Noriaki Nakayama

Ayaka Utsuki

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

Organization

Kyushu Institute ofTechnology

Yamaguchi University

Kobe University

Megumi Matsumoto Kobe University

Yusuke Seto

Toru KatoSven Stauss

Masato Goto

Shintaro Kobayashi

characterization of novel frustrated magnets with spin-chargeHiroaki Ueda
orbital degrees of freedom

Structural Transition in Ruddlesden-Popper Type Perovskite
oxidesTitle

大学院理学研究科

大学院理学研究科

大学院工学研究科

所属

物質合成・評価設備Gクラス（Materials Synthesis and Characterization G Class Researcher）

中山 則昭

宇津木 綾香 神戸大学

松本 恵

加藤 暢

〃

9

東京大学

京都大学

小林 慎太郎 京都大学

時間分解分光法を用いた超臨界流体中パルス
シュタウス ス
レーザープラズマによるダイヤモンドイド合成におヴェンける反応メカニズムの探索

〃

7

8

〃

京都大学

スピン・電荷・軌道の自由度を有する新規フラスト
植田 浩明
レート磁性体の物性評価

5

6

京都大学

氏名

Ruddlesden-Popper 型ペロブスカイト酸化物にお吉井 龍太
ける構造相転移

課題名

4

No.

東京大学

磯貝 俊介

東京大学

伊原 冬樹

東京大学

生駒 健太郎 東京大学

梶 智大

東京大学

嶋田 五百里 東京大学

大友 順一郎 東京大学〃

中温作動型燃料電池におけるプロトン伝導型固体電解質の開発

〃

19

20

21

東京大学

大友 順一郎 東京大学

中温作動プロトン伝導型燃料電池における多様な燃料の直接利用

18

庄野 洋平

櫻井 健一朗 東京大学〃

酸化物イオン伝導体とプロトン伝導体を用いた新大友 順一郎 東京大学
規二次電池の開発〃

酸化セリウムナノマテリアルのキャラクタリゼーショ
佐々木 岳彦 東京大学
ン〃

高温高圧水を利用した有機修飾微粒子の連続式
大友 順一郎 東京大学
合成技術の開発〃

固体酸化物形燃料電池の劣化挙動におけるイン大友 順一郎 東京大学
ピーダンススペクトルの解析〃

ケミカルループ法における鉄系酸素キャリア材料
大友 順一郎 東京大学の酸化還元反応特性と担体効果

松本 祐太

17

16

15

14

13

12

11

10

9

8

〃

7

名古屋工業大学

大友 順一郎 東京大学

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

6

氏名重い電子系反強磁性体Yb(Ni1-xCux)3Al9の結晶構
大原 繁男
造

課題名

5

No.

Material recycling from organic-inorganic composite waste
using supercritical water

大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
Shunsuke Isogai

Junichiro Otomo

Yuta Matsumoto

Junichiro Otomo

Shigeo Ohara

Name

Tomohiro Kaji

Takehiko Sasaki

Kentaro Ikoma

Junichiro Otomo

Fuyuki Ihara

Kenichiro Sakurai〃

Development of proton conducting electrolyte for intermediate
temperature fuel cells〃

Yohei Shono

Junichiro Otomo

Iori Shimada

Direct use of diverse fuels in a proton-conducting intermediate
Junichiro Otomo
temperature fuel cell〃

Development of novel rechargeable battery using oxide ion and
Junichiro Otomo
proton conductors〃

Characterization for cerium oxide nanomaterials〃

The development of continuous synthesis of organic-modified
particles in high temperature and pressure water〃

Analysis of electrochemical impedance spectra for the
Junichiro Otomo
identification of degradation mechanisms in solid oxide fuel cells〃

Reduction and Oxidation Kinetics of Iron Oxide Carriers andeffect of support materials for Chemical Looping Combustion〃

Structure study of heavy-fermion anitiferromagnet;
Yb(Ni1-xCux)3Al9

Title

大学院工学研究科

所属

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

Nagoya Institute ofTechnology

Organization

有馬 孝尚幾何学的フラストレーションを有する強相関電子
系の設計

〃

〃

〃

〃

〃

SOFC空気極における製造プロセス由来微量成分の電極特性に対する影響評価

〃

26

27

28

29

30

31

32

33

東京大学

東京大学

東京大学

東京大学

東京大学

東京大学

〃

37

38

複合型酸化物イオン伝導体の合成と金属-空気二次電池への応用

36

超臨界二酸化炭素中パルスレーザープラズマに シュタウス ス
よるナノ微粒子の合成
ヴェン

山本 高史

東京大学

東京大学

大友 順一郎 東京大学

東京大学

横

〃

35

哲

大友 順一郎 東京大学

東京大学

34 超臨界水を反応場としたナノ材料の創成

大石 淳矢

大友 順一郎 東京大学

豊田 新悟

ヌイェン
ドゥーイ カー 東京大学
ン

新居 陽一

佐賀山 基

阿部 伸行

川村 亮人

〃

プロトン伝導性中温作動燃料電池における新規リ
大友 順一郎 東京大学
ン酸ガラス-セラミックス電解質の開発

25

24

東京大学

高坂 文彦

〃

23

氏名

大友 順一郎 東京大学課題名

22 複合固体電解質の合成と大容量蓄電池の開発

No.
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科

所属

Synthesis of nanomaterials by pulsed-laser plasmas in highpressure and supercritical CO 2〃

Synthesis and utilization of nanocomposite materials for highlyoxide ion conducting electrolytes of metal-air secondary
battery〃

Synthesis of nano-materials using supercritical water as areaction medium〃

Evaluation of correlation between SOFC cathode performanceand trace element behavior in a SOFC production process

〃

〃

〃

〃

〃

Sven Stauss

Takashi Yamamoto

Junichiro Otomo

Akira Yoko

Junichiro Otomo

Junya Oishi

Junichiro Otomo

Shingo Toyoda

Nguyen Duy Khanh

Yoichi Nii

Hajime Sagayama

Nobuyuki Abe

Design of strongly correlated electron systems with geometrical
Taka-hisa Arima
frustration

Ryoto Kawamura

Junichiro Otomo

Development of Phosphate Glass-Ceramics Electrolyte forIntermediate-Temperature Fuel Cells with Proton-Conducting
Electrolyte〃

Fumihiko Kosaka

Junichiro Otomo

Name

〃

Synthesis of glass ceramics composite electrolyte anddevelopment of novel rechargeable battery.

Title

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

Organization

東京学芸大学

東京大学

澤井 理

陶 究

下水汚泥の超臨界水ガス化プロセスにおける栄養塩回収・固定化の実験的検討

高温高圧水とマイクロミキサを用いた機能性ナノ粒子の連続合成4950〃

様々な不純物をドープした超伝導体の結晶構造
解析

54

55

右田 稔

櫻井 辰弥

横浜国立大学

東京理科大学

大学院工学府

大学院理工学研究科

理工学部

東京理科大学

鉄カルコゲナイド超伝導体FeTe1-xSxにおける表面の酸化状態と超伝導性

53
山崎 照夫

大学院理工学
研究科

工学部

ナノシステム研
究部門

Structure analysis of the superconductor which doped various
impurities〃

Minoru Migita

Tatsuya Sakurai

Superconductivity and the state of oxidization on the surface inTeruo Yamazaki
iron calcogenide superconductors

Mariko Nagashima

Tetsuji Saito

Microstructural studies of newly developed permanent magnet
materials
Properties of low crystallinity clinozoisite

Kiwamu SueContinuous hydrothermal synthesis of functional nanoparticles
using a micromixer

Osamu Sawai

Recovery and immobilization of nutrients salts in the
環境安全研究セsupercritical water gasication process of municipal sewage
ンター
sludgeKouhei Yamada

Ikuzo Kanazawa

composition analysis of Vanadium doped beta-Boron byscanning electron microscope〃

Takahito Nakamura

The electrical properties of icosahedral Al-based quasicrystal
prepared by the SPS method

Effect of heat treatment on the electrical resistivity of
Ryuji Tamura
icosahedral Al-based quasicrystal prepared by the SPS method

Eiji Hosono

低結晶性クリノゾイサイトの非晶質特性の実態と原永嶌 真理子 山口大学
因の解明

千葉工業大学

Ikuzo Kanazawa

Thermoelectric properties and composition analysis, of Al
based icosahedral quasicrystals and approximate crystals, byscanning electron microscope
Makoto Saito

David Pai

Investigation of the reaction mechanisms in the synthesis of diamondoids by plasmas
in high-pressure and supercritical fluids Investigation of the reaction mechanisms inthe synthesis of diamondoids by plasmas in high-pressure and supercritical fluids〃

Keiichiro Urabe

Satoshi Kato

Name

Spectroscopic investigation of laser plasma generation
mechanisms in supercritical carbon-dioxide

Synthesis of nanomaterials by pulsed-laser plasmas in highpressure and supercritical CO 2

Title

エネルギー技術 Development of the functional materials such as secondary
研究部門
battery by the nanostructure control

大学院教育学
研究科

自然科学系

大学院基礎工
学研究科

基礎工学部

大学院教育学研究科

自然科学系

大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科所属

52

51 新規磁石材料の微細構造解析

齋藤 哲治

産業技術総合研究所

ナノ構造制御による二次電池等の機能性材料開
細野 英司
発

48

産業技術総合研究所

東京学芸大学

山田 浩平

〃

47

東京学芸大学金沢 育三

東京理科大学

SPS法によるAl基準結晶の作製と電気抵抗への熱
中村 敬人
処理の効果

45

46 Vドープβ-ボロンのSEMによる組成分析

東京理科大学

SPS法によるAl基準結晶の作製と電気抵抗への熱
田村 隆治
処理の効果

44

齋藤 誠

43

〃

東京学芸大学

超臨界流体中プラズマによるダイヤモンドイド合成 パイ デイビッ
東京大学における反応機構の探索
ド

41

42 Al系準結晶の熱電特性及びSEMによる組成分析 金沢 育三

超臨界二酸化炭素中レーザプラズマ生成現象の占部 継一郎 東京大学
分光学的基礎研究

東京大学

40

氏名

超臨界二酸化炭素中パルスレーザープラズマに
加藤 智嗣
よるナノ微粒子の合成

課題名

39

No.

Yokohama National
University

Tokyo University of
ScienceTokyo University of
Science

Yamaguchi University

Chiba Institute ofTechnology

National Institute ofIndustrial Science andTechnology

The University of
Tokyo

National Institute ofIndustrial Science andTechnology

Tokyo Gakugei
University

Tokyo Gakugei
University

Tokyo University of
ScienceTokyo University of
ScienceTokyo Gakugei
University

Tokyo Gakugei
University

The University ofTokyo

The University ofTokyo

The University ofTokyo

Organization

〃

〃

61

62

服部 賢

村岡 祐治

パルスレーザー堆積法により作製したTaO2薄膜
の物性評価

〃

68

69

72 金属炭化物微粒子の超伝導磁気特性

吉田 喜孝

諏訪 秀和

71

〃

廣井 政彦

70 ホイスラー型化合物の磁性と伝導の研究

藤本 佑樹

春森 浩平

〃

ハーフメタル型ホイスラー合金の磁性と輸送特性
重田 出
に関する研究〃東京大学

東京海洋大学

東京海洋大学

東京海洋大学

東京海洋大学〃〃

大学院海洋科
学技術研究科
大学院海洋科
学技術研究科

大学院理工学研究科

大学院理工学
研究科

大学院自然科
学研究科

大学院自然科
学研究科

大学院理工学研究科

大学院理工学研究科

物質創成科学研究科

物質創成科学研究科

Asuka Kimura

Ken Hattori

Kazue Nishimoto

Shogo Hara

Li Beizhan

Zhou Difan

Keita Tsuzuki

Mitsuru Izumi

Lee Dong Hae

Li LinName

Magnetic property in superconducting fine particles of metal
carbides〃Study on the magnetic and electrical properties of Heusler
compounds〃

Characterization of physical properties for TaO 2 thin films
prepared by pulsed laser deposition method〃

Yositaka Yosida

Hidekazu Suwa

Masahiko Hiroi

Yuki Fujimoto

Yuji Muraoka

Kouhei Harumori

Study on the magnetic and transport properties of half-metallic
Iduru Shigeta
Heusler alloys〃

SQUID measurements of Mn-silicide thin films

The structural studies of icosahedral cluster solids〃

大学院海洋科
学技術研究科

生産技術研究所〃

Magnetism and structural organization of bulk hightemperature superconductor and the related magnetic oxides

Precipitation behavior and magnetic properties of fine Co
particles in Cu-Ni-Co alloys

Partitioning of MnSiO 3 content between MgSiO 3 and CaSiO3
perovskites

Title

大学院海洋科
学技術研究科

大学院海洋科
学技術研究科

大学院工学府大学院理学院所属

いわき明星大学 科学技術学部

鹿児島大学

鹿児島大学

岡山大学

岡山大学

鹿児島大学

鹿児島大学

奈良先端科学
技術大学院大学
奈良先端科学
木村 明日香 技術大学院大
学

西本 一恵

原 章悟

李 備戦

周 迪帆

67

66

65

64 Mnシリサイド薄膜試料のSQUID測定

63 正20面体クラスター固体の構造に関する研究

〃

60

都築 啓太

東京海洋大学

バルク高温超伝導体および関連磁性酸化物の磁
和泉 充性と構造組織観察58〃

横浜国立大学李 東海

Cu-Ni-Co 系合金中のCo 微粒子の析出過程と磁気特性の関係

57

59

北海道大学

氏名

MnSiO3成分のMgSiO3組成とCaSiO3組成のケイ酸
李 林
塩ペロブスカイトへの分配

課題名

56

No.

Iwaki-Meisei
University

Kagoshima University

Kagoshima University

Okayama University

Okayama University

Kagoshima University

Kagoshima University

Nara Institute of
Science andTechnology
Nara Institute of
Science andTechnology

The University of
Tokyo

Tokyo University ofMarine Science andTechnology
Tokyo University ofMarine Science andTechnology
Tokyo University ofMarine Science andTechnology
Tokyo University ofMarine Science andTechnology
Tokyo University ofMarine Science andTechnology

Yokohama National
University

Hokkaido University

Organization

〃

〃

75

76

東京大学

セメント硬化体・セラミック系建材の分光反射率測
北垣 亮馬
定と日射熱制御に関する研究

80

イリジウム酸化物系の結晶構造評価

シリサイド系半導体単結晶の光学特性評価

4

課題名

3

No.

鵜殿 治彦

植松 大介

氏名

有馬 孝尚

イリジウム酸化物系の結晶構造評価

2

氏名

炭素材料の高分解能透過電子顕微鏡による微細
齋藤 幸恵
構造解析

課題名

1

No.

茨城大学

東京大学

東京大学

東京大学

工学部

大学院新領域
創成科学研究科

Daisuke Uematsu

Haruhiko Udono

Characterizations of optical properties single crystalline
Semiconducting Silicides

Name

Taka-hisa Arima

Yukie Saito

Name

Characterization of the crystal structure in iridate materials

Title

Characterization of the crystal structure in iridate materials

大学院新領域
創成科学研究科
所属

Structural analysis of carbon materials using high resolution
transmission electron microscopy

Title

大学院農学生命科学研究科所属

物質合成・評価設備Uクラス（Materials Synthesis and Characterization U Class Researcher）

大学院工学系
研究科

Controlling solar radiation heat by designing surface reflectivity
Ryoma Kitagakiof cementious/ceramic material for building use

Miho Itoi

Size effect on photo-switchable molecular magnet
K0.3Co[Fe(CN)6]0.77・3.4H2O

日本大学

多重安定性を示す光誘起分子磁性体のサイズ効
糸井 充穂
果の研究

79

医学部

Ai Momozawa

Investigation on phase formation and oxidation behavior of
boride ceramics, and development of arc-heater

東京大学

大学院新領域
創成科学研究科

桃沢 愛

ホウ化物セラミックスサンプルの相形成及び酸化挙動の研究およびアーク風洞の開発

78

Mahoto Takeda

Yusuke Matsuura

Kouichi Kitahara

Atsuro Sumiyoshi

Kaoru Kimura

Precipitation behavior and magnetic properties of fine Co
particles in Cu‐Ni‐Co based alloys

〃

〃

〃

Electronic Properties of Group 13 elements-based Cluster
SolidsName

大学院工学研
究院

大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科
大学院新領域
創成科学研究科

Title

Cu－Ni－Co系合金中のCo微粒子析出過程と磁竹田 真帆人 横浜国立大学
気特性の関係

東京大学

東京大学

東京大学

東京大学

所属

77

松浦 裕介

北原 功一

住吉 篤郎

〃

74

氏名

木村 薫

課題名

73 13族クラスター固体の電子物性に関する研究

No.

Ibaraki University

The University ofTokyo

Organization

The University ofTokyo

The University ofTokyo

Organization

The University ofTokyo

Nihon University

The University of
Tokyo

Yokohama National
University

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

Organization

ISSP 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 achievementsin the year 2011 include: (1) Investigation in high magnetic field of anisotropic spin dynamics of LiCuVO4 , a quasi 1D
frustrated antiferromagnet with a ferromagnetic nearest neighbor interaction, which enabled us to find evidence for thetwo-magnon bound state in the field range where the spin density wave order takes place at low temperatures, (2) Srearch fora spin nematic order in LiCuVO4 in very high magnetic fields immediately below the saturation, (3) Detailed and systematic
NMR experiments on the distorted Kagome spin system volborthite, which allowed us to determine the precise phase diagramwith unusual spin order and fluctuation effects in high magnetic fields.
1. ∗ High-Field Phase Diagram and Spin Structure of Volborthite Cu3 V2 O7 (OH)2 ·2H2 O: M. Yoshida, M. Takigawa, S.
Krämer, S. Mukhopadhyay, M. Horvati’c, C. Berthier, H. Yoshida, Y. Okamoto and Z. Hiroi, J. Phys. Soc. Jpn. 81(2012) 024703(1-9).
2. Magnetic Coulomb Fields of Monopoles in Spin Ice and Their Signatures in the Internal Field Distribution: G. Sala, C.
Castelnovo, R. Moessner, S. Sondhi, K. Kitagawa, M. Takigawa, R. Higashinaka and Y. Maeno, Phys. Rev. Lett. 108(2012) 217203(1-5).
3. ∗ Magnetic Order in the Spin-1/2 Kagome Antiferromagnet Vesignieite: M. Yoshida, Y. Okamoto, M. Takigawa and Z.
Hiroi, J. Phys. Soc. Jpn. 82 (2013) 013702(1-5).
4. ∗ Incomplete Devil‘s Staircase in the Magnetization Curve of SrCu2 (BO3 )2 : M. Takigawa, M. Horvatic, T. Waki, S.
Kramer, C. Berthier, F. L. Bertrand, I. Sheikin, H. Kageyama, Y. Ueda and F. Mila, Phys. Rev. Lett. 110 (2013)067210(1-5).
5. フラストレートした磁性体ボルボサイトのゆらぎと秩序: 吉田 誠, 瀧川 仁, 日本物理学会誌 67 (2012) 179-183.
6. 容積効率にこだわった高圧セルによる 10GPa 級 NMR 測定: 北川健 太郎, 松林 和幸, 後藤 弘匡, 松本 武彦, 上床美也, 八木 健彦, 瀧川 仁, 高圧力の科学と技術 22 (2012) 198-205.

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
2012. (1) Field and temperature variations of the specific heat C(H,T) of the heavy fermion superconductor CeCu2 Si2 (Tc =0.6
K) were examined at temperatures down to 50 mK. Quite unexpectedly, the low temperature C(H,T) indicates an exponential
decay with a two-gap feature in its temperature variation, along with a linear dependence as a function of H. The results
strongly indicate that the superconducting gap is fully opened, in sharp contrast to the general belief that CeCu2 Si2 is ad-wave superconductor. (2) We examined the low temperature magnetization of the Yb dimer compound Yb2 Pt3 Pb. The
results confirm the model, proposed in a preceding study by Ochiai et al., in which Yb3+ has an Ising-type Kramers doublet
in the crystalline electric field ground state. Interestingly, the system exhibits a spin-flop like phase at low temperatures andin high fields. This unusual behavior of the magnetization is explained by assuming a pseudo-spin flop of the doublet, which
can be stabilized by introducing a high-rank multipole interaction. (3) We measured the magnetization of the S=1/2 one
dimensional Heisenberg antiferromagnet CuPzN (interaction parameter J∼10 K) at temperatures down to 80 mK in magnetic
fields up to 15 T. At the base temperature (T/J=0.008), the field variation of the magnetization is found to closely follow theexact solution obtained by the Bethe ansatz.

1. † Nonmagnetic ground states and phase transitions in the caged compounds PrT2 Zn20 (T = Ru, Rh and Ir): T. Onimaru,
K. T. Matsumoto, N. Nagasawa, Y. F. Inoue, K. Umeo, R. Tamura, K. Nishimoto, S. Kittaka, T. Sakakibara and T.
Takabatake, J. Phys.: Condens. Matter 24 (2012) 294207(1-5).
2. ∗ Field dependence of the specific heat in a heavy-fermion superconductor CeIrIn5 : Y. Aoki, S. Kittaka, T. Sakakibara,
A. Sakai, S. Nakatsuji, Y. Tsutsumi, M. Ichioka and K. Machida, J. Phys. Soc. Jpn. 81 (2012) SB014(1-4).
3. Low Temperature Magnetization of Yb2 Pt2 Pb with the Shastry–Sutherland Type Lattice and a High-Rank Multipole
Interaction: Y. Shimura, T. Sakakibara, K. Iwakawa, K. Sugiyama and Y. Onuki, J. Phys. Soc. Jpn. 81 (2012)
103601(1-4).
4. ∗ Multiferroicity on the Zigzag-Chain Antiferromagnet MnWO4 in High Magnetic Fields: H. Mitamura, T. Sakakibara,
H. Nakamura, T. Kimura and K. Kindo, J. Phys. Soc. Jpn. 81 (2012) 054705(1-7).
5. Superconducting Gap Structure of the Cage Compound Sc5 Rh6 Sn18 : N. Kase, S. Kittaka, T. Sakakibara and J.
Akimitsu, J. Phys. Soc. Jpn. 81 (2012) SB016(1-4).
6. † Simultaneous superconducting and antiferroquadrupolar transitions in PrRh2 Zn20 : T. Onimaru, N. Nagasawa, K. T.
Matsumoto, K. Wakiya, K. Umeo, S. Kittaka, T. Sakakibara, Y. Matsushita and T. Takabatake, Phys. Rev. B 86 (2012)
184426(1-7).
7. ∗ Superconducting gap structure of CeIrIn5 from field-angle-resolved measurements of its specific heat: S. Kittaka,
Y. Aoki, T. Sakakibara, A. Sakai, S. Nakatsuji, Y. Tsutsumi, M. Ichioka and K. Machida, Phys. Rev. B 85 (2012)
060505(1-4).
8. カゴ状化合物 Pr1-2-20 系における非クラマース二重項と多彩な相転移現象: 鬼丸 孝博, 榊原 俊郎, 固体物理 47(2012) 565-576.
9. Destruction of the Kondo effect in the cubic heavy-fermion compound Ce3 Pd20 Si6 : J. Custers, K.-A. Lorenzer, M.
Müller, A. Prokofiev, A. Sidorenko, H. Winkler, A. M. Strydom, Y. Shimura, T. Sakakibara, R. Yu, Q. Si and S.
Paschen, Nature Mater. 11 (2012) 189-194.
10. Field-Induced Ordering in the Heavy Fermion Compound YbCo2 Zn20 : Y. Shimura, T. Sakakibara, S. Yoshiuchi, F.
Honda, R. Settai and Y. Onuki, J. Phys.: Conf. Ser. 391 (2012) 012066(1-4).
11. Field-temperature phase diagram of superconductivity in Sr2 RuO4 -Ru under out-of-plane uniaxial pressure: H.
Taniguchi, S. Kittaka, S. Yonezawa, H. Yaguchi and Y. Maeno, J. Phys.: Conf. Ser. 391 (2012) 012108(1-5).
12. ∗ T/B scaling of magnetization in the mixed valent compound β -YbAlB4 : Y. Matsumoto, S. Nakatsuji, K. Kuga, Y.
Karaki, Y. Shimura, T. Sakakibara, A. H. Nevidomskyy and P. Coleman, J. Phys.: Conf. Ser. 391 (2012) 012041(1-4).
13. Probing Spin Chirality of the Equilateral Triangular-Lattice Antiferromagnet RbFe(MoO4 )2 through Multiferroicity:
H. Mitamura, R. Watanuki, N. Onozaki, Y. Shimura, S. Kittaka, T. Sakakibara and K. Suzuki, J. Phys.: Conf. Ser. 391(2012) 012099(1-4).
14. Searching for the in-plane anisotropy of the specific heat of UPt3 in rotating fields: S. Kittaka, K. An, T. Sakakibara,
Y. Haga, E. Yamamoto, N. Kimura, Y. Onuki and K. Machida, J. Phys.: Conf. Ser. 391 (2012) 012031(1-4).
15. Anomalous Field-Angle Dependence of the Specific Heat of Heavy-Fermion Superconductor UPt3 : S. Kittaka, K. An,
T. Sakakibara, Y. Haga, E. Yamamoto, N. Kimura, Y. Onuki and K. Machida, J. Phys. Soc. Jpn. 82 (2013) 024707(1-5).
16. † Coexistence of Ising and XY Spin Systems on a Single Tb Atom in TbCoGa5 : N. Sanada, Y. Amou, R. Watanuki, K.
Suzuki, I. Yamamoto, H. Mitamura, T. Sakakibara, M. Akatsu, Y. Nemoto and T. Goto, J. Phys. Soc. Jpn. 82 (2013)
044713(1-7).
17. ∗ Evidence of a High-Field Phase in PrV2 Al20 in a [100] Magnetic Field: Y. Shimura, Y. Ohta, T. Sakakibara, A. Sakaiand S. Nakatsuji, J. Phys. Soc. Jpn. 82 (2013) 043705(1-4).
18. †∗ High-Field Phase Diagram of SmRu4 P12 Determined by Ultrasonic Measurements in Pulsed Magnetic Field up to 55
T: M. Yoshizawa, H. Mitamura, F. Shichinomiya, S. Fukuda, Y. Nakanishi, H. Sugawara, T. Sakakibara and K. Kindo,
J. Phys. Soc. Jpn. 82 (2013) 033602(1-5).
19. †∗ Long-range order and spin-liquid states of polycrystalline Tb2+x Ti2−x O7+y : T. Taniguchi, H. Kadowaki, H. Takatsu,
B. Fåk, J. Ollivier, T. Yamazaki, T. J. Sato, H. Yoshizawa, Y. Shimura, T. Sakakibara, T. Hong, K. Goto, L. R.
Yaraskavitch and J. B. Kycia, Phys. Rev. B 87 (2013) 060408R(1-5).

20. Determining the Surface-To-Bulk Progression in the Normal-State Electronic Structure of Sr2 RuO4 by Angle-Resolved
Photoemission and Density Functional Theory: C. N. Veenstra, Z. -H. Zhu, B. Ludbrook, M. Capsoni, G. Levy, A.
Nicolaou, J. A. Rosen, R. Comin, S. Kittaka, Y. Maeno, I. S. Elfimov and A. Damascelli, Phys. Rev. Lett. 110 (2013)
097004(1-5).
21. † Unconventional Magnetic and Thermodynamic Properties of S=1/2 Spin Ladder with Ferromagnetic Legs: H.
Yamaguchi, K. Iwase, T. Ono, T. Shimokawa, H. Nakano, Y. Shimura, N. Kase, S. Kittaka, T. Sakakibara, T. Kawakami
and Y. Hosokoshi, Phys. Rev. Lett. 110 (2013) 157205(1-5).

Mori group
We have successfully developed and characterized the functional molecular materials. The major achievements in 2012 are (1)to develop the purely organic single-component organic conductor kappa-H3 (Cat-EDT-ST)2 which shows metallic state under
1GPa, (2) to develop the proton-electron coupled conductor with the proton arrangement driven by the charge ordering, and(3)to develop the pressure-induced superconductor beta-(meso-DMBEDT-TTF)2 AsF6 which shows the checkerboard-typecharge ordering at ambient pressure.
1. Recent Topics of Organic Superconductors: A. Ardavan, S. Brown, S. Kagoshima, K. Kanoda, K. Kuroki, H. Mori, M.
Ogata, S. Uji and J. Wosnitza, J. Phys. Soc. Jpn. 81 (2012) 011004(27 pages).
2. Charge-order driven proton arrangement in a hydrogen-bonded charge-transfer complex based on a pyridyl-substituted
TTF derivative: S. C. Lee, A. Ueda, H. Kamo, K. Takahashi, M. Uruichi, K. Yamamoto, K. Yakushi, A. Nakao, R.
Kumai, K. Kobayashi, H. Nakao, Y. Murakami and H. Mori, Chem. Commun. 48 (2012) 8673-8675.
3. Reversible iodine absorption by alkali-TCNQ salts with associated changes in physical properties: A. Funabiki, T.
Mochida, K. Takahashi, H. Mori, T. Sakurai, H. Ohtad and M. Uruich, J. Mater. Chem. 344 (2012) 8361-8366.
4. Development of chiral molecular crystals: S. J. Krivickas, C. Hashimoto, K. Takahashi, J. D. Wallis and H. Mori, Phys.
Status Solidi C 9（5） (2012) 1146-1148.
5. ∗ Magnetism in crown-ether-substituted nitronyl nitroxide derivatives and their metal complexes: T. Sugano, S. J.
Blundell, W. Hayes, H. Tajima and H. Mori, Phys. Status Solidi C 9(5) (2012) 1205-1207.
6. Thermoelectric and thermal properties of novel τ -type organic conductors as thermoelectric materials: H. Yoshino,
H. Nakada, S. J. Krivickas, H. Mori, G. C. Anyfantis, G. C. Papavassiliou and K. Murata, Phys. Status Solidi C 9(5)(2012) 1193-1195.
7. ∗ Cooperative spin transition and thermally quenched high-spin state in new polymorph of [Fe(qsal)2 ]I3 : K. Takahashi,
T. Sato, H. Mori, H. Tajima, Y. Einaga and O. Sato, Hyp. Int. 1-5 (2012) 206(1-3).
8. Manipulation of the heme electronic structure by external stimuli and ligand field: Y. Ohgo, M. Takahashi, K.
Takahashi, Y. Namatame, H. Konaka, H. Mori, S. Neya, S. Hayami, D. Hashizume and M. Nakamura, Hyp. Int.
23-33 (2012) 206(1-3).
9. Spectroscopic characterization of charge order fluctuations in BEDT-TTF metals and superconductors: A. Girlando,
M. Masino, S. Kaiser, Y. Sun N. Drichko, M. Dressel and H. Mori, Phys. Status Solidi B 24 (2012) 953-956.
10. Synthesis and properties of catechol-fused tetrathiafulvalene derivatives and their hydrogen-bonded conductive
charge-transfer salts: H. Kamo, A. Ueda, T. Isono, K. Takahashi and H. Mori, Tetrahedron Letters 53 (2012) 4385-4388.
11. Magnetism and Pressure-Induced Superconductivity of Checkerboard-Type Charge-Ordered Molecular Conductor
β -(meso-DMBEDT-TTF)2 X (X = PF6 and AsF6 ): T. Shikama, T. Shimokawa, S. Lee, T. Isono, A. Ueda, K. Takahashi,
A. Nakao, R. Kumai, H. Nakao, K. Kobayashi, Y. Murakami, M. Kimata, H. Tajima, K. Matsubayashi, Y. Uwatoko, Y.
Nishio, K. Kajita and H. Mori, Crystals 2 (2012) 1502-1513.
12. Pyridone derivatives carrying radical moieties: Hydrogen-bonded structures, magnetic properties, and metal
coordination: M. Ueda, T. Mochida and H. Mori, Polyhedron 52 (2013) 755-760.
13. Fabrication of a field effect transistor structure using charge-ordered organic materials α -(BEDT-TTF)2 I3 andα ’-(BEDT-TTF)2 IBr2 : M. Kimata, T. Ishihara, A. Ueda, H. Mori and H. Tajima, Synthetic Metals 173 (2013) 43-45.
14. Hydrogen bond-promoted metallic state in a purely organic single-component conductor under pressure: T. Isono, H.
Kamo, A. Ueda, K. Takahashi, A. Nakao, R. Kumai, H. Nakao, K. Kobayashi, Y. Murakami and H. Mori, Nature
Commun. 4 (2013) 1344-1349.

Tajima group
Our main subject is the electrical properties on molecular assemblies especially on organic thin films and conducting
molecular crystals. The major achievements in 2012 include (1) spin injection experiments into a organic conductive polymer
PEDOT:PSS, (2) a detailed report on a new technique for determining a trap density function based on the photo-CELIV
measurements, and (3) magnetic torque studies on conducting phthalocyanine salts.
1. Electrostatic Charge Carrier Injection into the Charge-Ordered Organic Material α -(BEDT-TTF)2 I3 : M. Kimata, T.
Ishihara and H. Tajima, J. Phys. Soc. Jpn. 81 (2012) 073704(1-4).
2. ∗ Magnetism in crown-ether-substituted nitronyl nitroxide derivatives and their metal complexes: T. Sugano, S. J.
Blundell, W. Hayes, H. Tajima and H. Mori, Phys. Status Solidi C 9(5) (2012) 1205-1207.
3. ∗ Cooperative spin transition and thermally quenched high-spin state in new polymorph of [Fe(qsal)2 ]I3 : K. Takahashi,
T. Sato, H. Mori, H. Tajima, Y. Einaga and O. Sato, Hyp. Int. 1-5 (2012) 206(1-3).
4. Direct determination of trap density function based on the photoinduced charge carrier extraction technique: H. Tajima,
T. Suzuki and M. Kimata, Organic Electronics 13 (2012) 2272-2280.
5. ∗ Observation of Phonon-Assisted Magnon Absorption in Spin–Orbit Coupling Induced Mott Insulator Sr2 IrO4 : Y.
Hirata, H. Tajima and K. Ohgushi, J. Phys. Soc. Jpn. 82 (2013) 035002(1-2).
6. ∗ Mechanism of Enhanced Optical Second-Harmonic Generation in the Conducting Pyrochlore-Type Pb2 Ir2 O7−x Oxide
Compound: Y. Hirata, M. Nakajima, Y. Nomura, H. Tajima, Y. Matsushita, K. Asoh, Y. Kiuchi, A. G. Eguiluz, R. Arita,
T. Suemoto and K. Ohgushi, Phys. Rev. Lett. 110 (2013) 187402(1-5).
7. Characteristics of organic light-emitting devices consisting of dye-doped spin crossover complex films: M. Matsuda,
K. Kiyoshima, R. Uchida, N. Kinoshita and H. Tajima, Thin Solid Films 531 (2013) 451-453.
8. Electrochemically Fabricated Phthalocyanine-Based Molecular Conductor Films and Their Potential Use in Organic
Electronic Devices: M. Matsuda, N. Kinoshita, M. Fujishima, S. Tanaka, H. Tajima and H. Hasegawa, Appl. Phys.
Express 6 (2013) 021602 1-3.
9. 新著紹介「太陽電池の物理」: 田島 裕之, 日本物理学会誌 68 (2013) 186-187.
10. 固体の分光測定: 田島 裕之, 「大学院講義物理化学（第 2 版）3 固体の化学と物性」, 7, 近藤 保, (東京化学同人,
2012), 190-198.

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 2012. (1) We have found that Pr2 Zr2 O7 , the sister insulating compound of
Pr2 Ir2 O7 , has strong quantum monopolar fluctuations in the spin ice state. This suggests the monopole in this exchange-based
spin ice may propagate coherently in the lattice, in contrast with the diffusive motion of the classical counterpart. (2)We discovered heavy fermion superconductivity in the ferroquadrupolar state in the quadrupolar Kondo lattice system
PrTi2 Al20 . (3) The strong temperature and field dependence of the Hall resistivity of β -YbAlB4 indicates that the low
coherence temperature of 40 K in comparison with the valence fluctuation scale of 300 K. The results further suggest theband dependence of the localized and itinerant characters of f-electrons.
1. ∗ Field dependence of the specific heat in a heavy-fermion superconductor CeIrIn5 : Y. Aoki, S. Kittaka, T. Sakakibara,
A. Sakai, S. Nakatsuji, Y. Tsutsumi, M. Ichioka and K. Machida, J. Phys. Soc. Jpn. 81 (2012) SB014(4 pages).
2. Low Temperature Properties of the Cubic Kondo Lattice Systems SmTr2 Al20 (Tr = Ti, V, Cr): A. Sakai and S. Nakatsuji,
J. Phys. Soc. Jpn. 81 (2012) SB049 (5 pages).
3. Microscopic Evidence for Long-Range Magnetic Ordering in the Γ8 Ground Quartet Systems SmTr2 Al20 (Tr: Ti, V,Cr): T. U. Ito, W. Higemoto, K. Ninomiya, A. Sakai and S. Nakatsuji, J. Phys. Soc. Jpn. 81 (2012) SB050 (4 pages).
4. Superconductivity in the Ferroquadrupolar State in the Quadrupolar Kondo Lattice PrTi2 Al20 : A. Sakai, K. Kuga and
S. Nakatsuji, J. Phys. Soc. Jpn. 81 (2012) 083702 (4 pages).
5. Continuous transition between antiferromagnetic insulator and paramagnetic metal in the pyrochlore iridate Eu2 Ir2 O7 :J. Ishikawa, E. C. T. O’Farrell and S. Nakatsuji, Phys. Rev. B 85 (2012) 245109(1-6).

6. Evidence for an exotic magnetic transition in the triangular spin system FeGa2 S4 : P. Dalmas de Réotier, A. Yaouanc,
D. E. MacLaughlin, S. Zhao, T. Higo, S. Nakatsuji, Y. Nambu, C. Marin, G. Lapertot, A. Amato and C. Baines, Phys.
Rev. B 85 (2012) 140407(1-5).
7. Ferroquadrupolar ordering in PrTi2 Al20 : T. Sato, S. Ibuka, Y. Nambu, T. Yamazaki, T. Hong, A. Sakai and S. Nakatsuji,
Phys. Rev. B 86 (2012) 184419(1-8).
8. Magnetic order induced by Fe substitution of Al site in the heavy-fermion systems α -YbAlB4 and β -YbAlB4 : K.
Kuga, G. Morrison, L. Treadwell, J. Y. Chan and S. Nakatsuji, Phys. Rev. B 86 (2012) 224413(1-6).
9. Pressure-tuned insulator to metal transition in Eu2 Ir2 O7 : F. Tafti, J. Ishikawa, A. McCollam, S. Nakatsuji and S. Julian,
Phys. Rev. B 85 (2012) 205104(1-6).
10. Spin dynamics and spin freezing in the triangular lattice antiferromagnets FeGa2 S4 and NiGa2 S4 : S. Zhao, P. Dalmas
de Réotier, A. Yaouanc, D. MacLaughlin, J. Mackie, O. Bernal, Y. Nambu, T. Higo and S. Nakatsuji, Phys. Rev. B 86
(2012) 064435(1-11).
11. ∗ Superconducting gap structure of CeIrIn5 from field-angle-resolved measurements of its specific heat: S. Kittaka,
Y. Aoki, T. Sakakibara, A. Sakai, S. Nakatsuji, Y. Tsutsumi, M. Ichioka and K. Machida, Phys. Rev. B 85 (2012)
060505(1-4).
12. Evolution of c-f Hybridization and Two-Component Hall Effect in β -YbAlB4 : E. O’Farrell, Y. Matsumoto and S.
Nakatsuji, Phys. Rev. Lett. 109 (2012) 176405(1-5).
13. ∗ Pressure-Induced Heavy Fermion Superconductivity in the Nonmagnetic Quadrupolar System PrTi2 Al20 : K.
Matsubayashi, T. Tanaka, A. Sakai, S. Nakatsuji, Y. Kubo and Y. Uwatoko, Phys. Rev. Lett. 109 (2012) 187004(1-5).
14. Thermoelectric Response Near a Quantum Critical Point of β -YbAlB4 and YbRh2 Si2 : A Comparative Study: Y.
Machida, K. Tomokuni, C. Ogura, K. Izawa, K. Kuga, S. Nakatsuji, G. Lapertot, G. Knebel, J. -P. Brison and J.
Flouquet, Phys. Rev. Lett. 109 (2012) 156405(1-5).
15. Yb 系の重い電子化合物における量子臨界性と超伝導: 中辻 知, 固体物理 47 (2012) 521-535.
16. Spin-Orbital Short-Range Order on a Honeycomb-Based Lattice: S. Nakatsuji, K. Kuga, K. Kimura, R. Satake, N.
Katayama, E. Nishibori, H. Sawa, R. Ishii, M. Hagiwara, F. Bridges, T. U. Ito, W. Higemoto, Y. Karaki, M. Halim, A.
A. Nugroho, J. A. Rodriguez-Rivera, M. A. Green and C. Broholm, Science 336 (2012) 559-563.
17. 磁気秩序なしに起こる新しい巨大ホール効果: 中辻 知, パリティ 27-7 (2012) P.11-17.
18. New magnetic phase diagram of (Sr,Ca)2 RuO4 : J. P. Carlo, T. Goko, I. M. Gat-Malureanu, P. L. Russo, A. T. Savici,
A. A. Aczel, G. J. MacDougall, J. A. Rodriguez, T. J. Williams, G. M. Luke, C. R. Wiebe, Y. Yoshida, S. Nakatsuji, Y.
Maeno, T. Taniguchi and Y. J. Uemura, Nature Mater. 11 (2012) 323-328.
19. ∗ T/B scaling of magnetization in the mixed valent compound β -YbAlB4 : Y. Matsumoto, S. Nakatsuji, K. Kuga, Y.
Karaki, Y. Shimura, T. Sakakibara, A. H. Nevidomskyy and P. Coleman, J. Phys.: Conf. Ser. 391 (2012) 012041(1-4).
20. Shubnikov-de Haas oscillations in the heavy fermion α -YbAlB4 : E. C. T. O’Farrell, D. A. Tompsett, N. Horie, S.
Nakatsuji and M. L. Sutherland, J. Phys.: Conf. Ser. 391 (2012) 012053(1-4).
21. Thermal properties of the nonmagnetic cubic Γ3 Kondo lattice systems PrTr2 Al20 (Tr = Ti, V): A. Sakai and S. Nakatsuji,
J. Phys.: Conf. Ser. 391 (2012) 012058(1-4).
22. Structure and physical properties of single crystal PrCr2 Al20 and CeM2 Al20 (M=V,Cr): comparison of compounds
adopting the CeCr2 Al20 structure type: M. J. Kangas, D. Schmitt, A. Sakai, S. Nakatsuji and J. Y. Chan, Journal of
Solid State Chemistry 196 (2012) 274-281.
23. Discovery of the Novel Quantum Liquid Robust Against Disorder in Pseudo-Honeycomb Lattice Antiferromagnet
Ba3 CuSb2 O9 : N. Katayama, R. Satake, E. Nishibori, H. Sawa and S. Nakatsuji, SPring-8 Information 17, No.4 (2012)297-303.
24. ∗ Evidence of a High-Field Phase in PrV2 Al20 in a [100] Magnetic Field: Y. Shimura, Y. Ohta, T. Sakakibara, A. Sakaiand S. Nakatsuji, J. Phys. Soc. Jpn. 82 (2013) 043705(1-4).
25. Determination of long-range all-in-all-out ordering of Ir4+ moments in a pyrochlore iridate Eu2 Ir2 O7 by resonant x-ray
diffraction: H. Sagayama, D. Uematsu, T. Arima, K. Sugimoto, J. J. Ishikawa, E. O’Farrell and S. Nakatsuji, Phys.
Rev. B 87 (2013) 100403(4 pages).

26. Dynamical spin-orbital correlation in the frustrated magnet Ba3 CuSb2 O9 : Y. Ishiguro, K. Kimura, S. Nakatsuji, S.
Tsutsui, A. Q. R. Baron, T. Kimura and Y. Wakabayashi, Nature Commun. 4 (2013) 1-11, in print.
27. Chemical effects of high-resolutionYbLγ 4 emission spectra: a possible probe for chemical analysis: H. Hayashi, N.
Kanai, N. Kawamura, Y. H. Matsuda, K. Kuga, S. Nakatsuji, T. Yamashita and S. Ohara, X-Ray Spectrometry (2013)
1-18, in print.
28. Quantum fluctuations in spin-ice-like Pr2 Zr2 O7 : K. Kimura, S. Nakatsuji, J. J. Wen, C. Broholm, M. B. Stone and E.
Nishibori & H. Sawa, Nature Commun. 4 (2013) 1-6, in print.
29. 銅酸化物における乱れに強い量子液体状態: 中辻 知, 澤 博, 「超伝導現象と高温超伝導体」, 新日本編集企画,(NTS 出版社, 2013), 475-481.

Ohgushi group
Our group is focused on an exploratory synthesis and characterization of oxides, chalcogenides, and intermetallics. The
major achievements in the fiscal year 2012 are (1) investigation of electronic properties of Fe-based ladder compounds, and(2) elucidation of magnetic and orbital structures of 5d transition metal oxides by means of resonant x-ray diffraction.
1. †∗ Abrupt change in the energy gap of superconducting Ba1−x Kx Fe2 As2 single crystals with hole doping: W. Malaeb,
T. Shimojima, Y. Ishida, K. Okazaki, Y. Ota, K. Ohgushi, K. Kihou, T. Saito, C. H. Lee, S. Ishida, M. Nakajima, S.
Uchida, H. Fukazawa, Y. Kohori, A. Iyo, H. Eisaki, C. -T. Chen, S. Watanabe, H. Ikeda and S. Shin, Phys. Rev. B 86
(2012) 165117 (1-7).
2. ∗ Block magnetism coupled with local distortion in the iron-based spin-ladder compound BaFe2 Se3 : Y. Nambu, K.
Ohgushi, S. Suzuki, F. Du, M. Avdeev, Y. Uwatoko, K. Munakata, H. Fukazawa, S. Chi, Y. Ueda and T. Sato, Phys.
Rev. B 85 (2012) 064413(1-5).
3. Doping dependence of Hall coefficient and evolution of coherent electronic state in the normal state of the Fe-based
superconductor Ba1−x Kx Fe2 As2 : K. Ohgushi and Y. Kiuchi, Phys. Rev. B 85 (2012) 064522(1-5).
4. ∗ Stripelike magnetism in a mixed-valence insulating state of the Fe-based ladder compound CsFe2 Se3 : F. Du, K.
Ohgushi, Y. Nambu, T. Kawakami, M. Avdeev, Y. Hirata, Y. Watanabe, T.-J. Sato and Y. Ueda, Phys. Rev. B 85 (2012)
214436(1-5).
5. ∗ Tetrahedral Magnetic Order and the Metal-Insulator Transition in the Pyrochlore Lattice of Cd2 Os2 O7 : J. Yamaura,
K. Ohgushi, H. Ohsumi, T. Hasegawa, I. Yamauchi, K. Sugimoto, S. Takeshita, A. Tokuda, M. Takata, M. Udagawa,M. Takigawa, H. Harima, T. Arima and Z. Hiroi, Phys. Rev. Lett. 108 (2012) 247205(1-5).
6. ∗ Insitu observation of shear stress-induced perovskite to post-perovskite phase transition in CaIrO3 and the developmentof its deformation texture in a diamond-anvil cell up to 30 GPa: K. Niwa, N. Miyajima, Y. Seto, K. Ohgushi, H. Gotou
and T. Yagi, Phys. Earth Planet. Inter. 194–195 (2012) 10–17.
7. ∗ Observation of Phonon-Assisted Magnon Absorption in Spin–Orbit Coupling Induced Mott Insulator Sr2 IrO4 : Y.
Hirata, H. Tajima and K. Ohgushi, J. Phys. Soc. Jpn. 82 (2013) 035002(1-2).
8. Complex orbital state stabilized by strong spin-orbit coupling in a metallic iridium oxide IrO2 : Y. Hirata, K. Ohgushi,
J.-I. Yamaura, H. Ohsumi, S. Takeshita, M. Takata and T. Arima, Phys. Rev. B 87 (2013) 161111(1-5).
9. Magnetoelasticity in ACr2 O4 spinel oxides (A = Mn, Fe, Co, Ni, and Cu): V. Kocsis, S. Bordács, D. Varjas, K. Penc,
A. Abouelsayed, C. A. Kuntscher, K. Ohgushi, Y. Tokura and I. Kézsmárki, Phys. Rev. B 87 (2013) 064416(1-9).
10. ∗ Mechanism of Enhanced Optical Second-Harmonic Generation in the Conducting Pyrochlore-Type Pb2 Ir2 O7−x Oxide
Compound: Y. Hirata, M. Nakajima, Y. Nomura, H. Tajima, Y. Matsushita, K. Asoh, Y. Kiuchi, A. G. Eguiluz, R. Arita,
T. Suemoto and K. Ohgushi, Phys. Rev. Lett. 110 (2013) 187402(1-5).
11. Resonant X-ray Diffraction Study of the Strongly Spin-Orbit-Coupled Mott Insulator CaIrO3 : K. Ohgushi, J.-I.
Yamaura, H. Ohsumi, K. Sugimoto, S. Takeshita, A. Tokuda, H. Takagi, M. Takata and T.-H. Arima, Phys. Rev.
Lett. 110 (2013) 217212(1-5).
12. † Suppression of Intersite Charge Transfer in Charge-Disproportionated Perovskite YCu3 Fe4 O12 : H. Etani, I. Yamada,K. Ohgushi, N. Hayashi, Y. Kusano, M. Mizumaki, J. Kim, N. Tsuji, R. Takahashi, N. Nishiyama, T. Inoue, T. Irifune
and M. Takano, J. Am. Chem. Soc. 135 (2013) 6100-6106.

13. † B-Site Deficiencies in A-site-Ordered Perovskite LaCu3 Pt3.75 O12 : M. Ochi, I. Yamada, K. Ohgushi, Y. Kusano, M.
Mizumaki, R. Takahashi, S. Yagi, N. Nishiyama, T. Inoue and T. Irifune, Inorg. Chem. 52 (2013) 3985-3989.
14. † Pd2+ -Incorporated Perovskite CaPd3 B4 O12 (B = Ti, V): K. Shiro, I. Yamada, N. Ikeda, K. Ohgushi, M. Mizumaki, R.
Takahashi, N. Nishiyama, T. Inoue and T. Irifune, Inorg. Chem. 52 (2013) 1604-1609.

Division of Condensed Matter Theory
K. Ueda group
Following the previous year, the problem of the Kondo effect of a magnetic ion vibrating in a metal was investigated. In 2011,
we investigated the nature of Kondo effect in the weak electron correlation regime from a different point of view. It has turned
out that the essential physics in this regime can be understood by the concept of electric dipolar Kondo effect. As anothertopic, our group focused on shot noise observed in the Kondo tunnelingthrough the dot with orbital degeneracy. The Fanofactor determined by the Wilson ratio was calculated by employing the NRG calculation. This approach was also applied to
the FQH edge states. Analyzing shot noise at finite temperatures, we proposed a way to observe the fractional statistics for
Laughlin quasi-particles.
1. Dimensional Reduction and Odd-Frequency Pairing of the Checkerboard-Lattice Hubbard Model at 1/4-Filling: Y.
Yanagi, Y. Yamashita and K. Ueda, J. Phys. Soc. Jpn. 81 (2012) 123701(1-4).
2. Electric Dipolar Kondo Effect Emerging from a Vibrating Magnetic Ion: T. Hotta and K. Ueda, Phys. Rev. Lett. 108(2012) 247214(1-5).
3. 固体物理特集号「重い電子系の物理の最近の発展」 はじめに: 上田 和夫, 固体物理 67 (2012) 509-510.
4. 高温超伝導–理論–: 上田 和夫, 「物性物理学ハンドブック」, 川畑有郷・鹿児島誠一・北岡良雄・上田正仁, (朝倉書店, 2012), 175-182.

Takada group
Employing several techniques including the Green’s-function approach, the density-matrix renormalization group, quantum
Monte Carlo simulations, band-structure calculations, and several types of variational 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 studied the following issues: (1) With use of both the diffusion Monte Carlo method and the density
functional theory, a detailed analysis is made on the system of a proton embedded in an electron gas with a view of clarifying
the difference between this first-principles system and the impurity Anderson model devised for investigating the Kondo
physics. With the decrease of the electron density of the electron gas, the electronic state around the proton changes
in three steps, i.e., from the hydron H+ with itinerant metallic screening to the totally localized hydride H− through the
Kondo-resonant nonmagnetic neutral hydrogen H. The transition of each step is abrupt. (2) With use of analytical methods aswell as the powerful self-consistent numerical scheme of GWΓ, we have discovered an electron-like elementally excitation(pseudoelectron) in the Luttinger liquid. The pseudoelectron is considered as a spinon-(anti)holon composite particle.
Although it manifests itself only as the small cusp behavior in the one-electron spectral function near the Fermi level, it
constitutes the main structure if the momentum is far away from the Fermi momentum. (3) With a better functional form forΓ always satisfying not only the Ward identity but also the momentum conservation law, we have investigated the low-density
electron gas in the GWΓ scheme to find an anomalous mass reduction as a result of avoiding the collapse of the normal state
into a spontaneously excited electron-hole liquid (excitonic liquid).
1. ∗ Coulomb Frustrated Phase Separation in Quasi-Two-Dimensional Organic Conductors on the Verge of Charge
Ordering: K. Yoshimi and H. Maebashi, J. Phys. Soc. Jpn. 81 (2012) 063003(1-4).
2. Superconductivity in a Correlated E ⊗ e Jahn-Teller System: C. Hori, H. Maebashi and Y. Takada, J. Supercond. Nov.
Magn. 25 (2012) 1369-1373.
3. 超伝導転移温度の第一原理計算: 高田 康民, 「岩波講座：計算科学 「計算と物質」」, 第８章, 押山淳, (岩波書店, 2012), 221-267.

Oshikawa group
We studied a wide range of fundamental problems in condensed matter theory and statistical mechanics. In particular,
we discussed doping of holes into the spin liquid phases of the Quantum Dimer Model (QDM). A fundamental issue is thepossible existence of a superconducting phase in such systems and its properties. For this purpose, the question of the statisticsof the mobile holes (or “holons”) was addressed first. We proved a general “statistical transmutation” symmetry of such doped
QDM by using composite operators of dimers and holes. This exact transformation enables to define duality equivalenceclasses (or families) of doped QDM, and provides the analytic framework to analyze dynamical statistical transmutations.
We then discussed possible superconducting phases of the system. In particular, the possibility of an exotic superconducting
phase originating from the condensation of (bosonic) charge-e holons was examined. It was shown that flux quantization does
not distinguish such an exotic superconducting phase from a standard one due to Cooper pairing. Thus we proposed a newgauge-invariant holon Green’s function, as a mean to detect the exotic phase. A numerical evidence supported its existencein the doped QDM on a triangular lattice.
1. † Correlation effects in two-dimensional topological insulators: Y. Tada, R. Peters, M. Oshikawa, A. Koga, N.
Kawakami and S. Fujimoto, Phys. Rev. B 85 (2012) 165138(1-18).
2. † Field theory analysis of S=1 antiferromagnetic bond-alternating chains in the dimer phase: J. Tamaki and M.
Oshikawa, Phys. Rev. B 85 (2012) 134431(1-10).
3. † General method for calculating the universal conductance of strongly correlated junctions of multiple quantum wires:
A. Rahmani, C.-Y. Hou, A. Feiguin, M. Oshikawa, C. Chamon and I. Affleck, Phys. Rev. B 85 (2012) 045120(1-24).
4. Mass ratio of elementary excitations in frustrated antiferromagnetic chains with dimerization: S. Takayoshi and M.
Oshikawa, Phys. Rev. B 86 (2012) 144408 (1-6).
5. † Quasiparticle statistics and braiding from ground-state entanglement: Y. Zhang, T. Grover, A. Turner, M. Oshikawa
and A. Vishwanath, Phys. Rev. B 85 (2012) 235151(1-15).
6. † Symmetry protection of topological phases in one-dimensional quantum spin systems: F. Pollmann, E. Berg, A. M.
Turner and M. Oshikawa, Phys. Rev. B 85 (2012) 075125(1-9).
7. † Thermodynamic properties of quantum sine-Gordon spin chain system KCuGaF6 : I. Umegaki, H. Tanaka, T. Ono, M.
Oshikawa and K. Sakai, Phys. Rev. B 85 (2012) 144423(1-9).
8. † Boundary Resonances in S=1/2 Antiferromagnetic Chains Under a Staggered Field: S. C. Furuya and M. Oshikawa,Phys. Rev. Lett. 109 (2012) 247603(1-5).
9. † Electron Spin Resonance Shift in Spin Ladder Compounds: S. C. Furuya, P. Bouillot, C. Kollath, M. Oshikawa and T.
Giamarchi, Phys. Rev. Lett. 108 (2012) 037204(1-5).
10. † Instability in Magnetic Materials with a Dynamical Axion Field: H. Ooguri and M. Oshikawa, Phys. Rev. Lett. 108(2012) 161803(1-5).
11. Superconductivity Induced by Longitudinal Ferromagnetic Fluctuations in UCoGe: T. Hattori, Y. Ihara, Y. Nakai, K.
Ishida, Y. Tada, S. Fujimoto, N. Kawakami, E. Osaki, K. Deguchi, N. Sato and I. Satoh, Phys. Rev. Lett. 108 (2012)066403(1-5).
12. † Electron spin resonance shifts in S=1 antiferromagnetic chains: S. C. Furuya, Y. Maeda and M. Oshikawa, Phys. Rev.
B 87 (2013) 125122 (1-10).
13. † Hole statistics and superfluid phases in quantum dimer models: C. A. Lamas, A. Ralko, M. Oshikawa, D. Poilblancand P. Pujol, Phys. Rev. B 87 (2013) 104512(1-20).

Tsunetsugu group
We have investigated p-wave superconductivity near a transverse saturation field in easy-axis ferromagnets and demonstrated
that soft-magnon excitations lead to enhancement and re-entrance of the superconducting transition temperature. This
explains the enhanced superconducting transition temperature in the reentrant superconductivity in URhGe under transverse
magnetic fields.
We have also extended our earlier analysis about phonon coupled Kondo systems. We have constructed a boundary
conformal field theory (BCFT) with non-magnetic SO(5) degrees of freedom, which successfully explains earlier numericalresults. We have further developed a powerful continuous-time quantum Monte Carlo algorithm for general phonon-assisted
hybridization Anderson models and checked the validity of the results by the BCFT.
We have also clarified various details of transport criticality in electric conductivity near the Mott transition in a frustrated
Hubbard model, using large-scale numerical simulations based on the cluster dynamical mean-field theory.

1. ∗ Rattling Good Superconductor: the β -Pyrochlore Oxide AOs2 O6 : Z. Hiroi, J. Yamaura and K. Hattori, J. Phys. Soc.
Jpn. 81 (2012) 011012 (24 pages).
2. Transport Criticality in Triangular Lattice Hubbard Model: T. Sato, K. Hattori and H. Tsunetsugu, J. Phys. Soc. Jpn.
81 (2012) 083703 (4 pages).
3. Bipolaron-SO(5) Non-Fermi Liquid in a Two-channel Anderson Model with Phonon-assisted Hybridizations: K.
Hattori, Phys. Rev. B 85 (2012) 214411 (14 pages).
4. Conventional and charge-six superfluids from melting hexagonal Fulde-Ferrell-Larkin-Ovchinnikov phases in two
dimensions: D. F. Agterberg, M. Geracie and H. Tsunetsugu, Phys. Rev. B 84 (2012) 014513 (7 pages).
5. Non-Fermi liquid, unscreened scalar chirality, and parafermions in a frustrated tetrahedron Anderson model: K. Hattoriand H. Tsunetsugu, Phys. Rev. B 86 (2012) 054421 (6 pages).
6. Transport criticality at the Mott transition in a triangular-lattice Hubbard model: T. Sato, K. Hattori and H. Tsunetsugu,
Phys. Rev. B 86 (2012) 235137 (13 pages).
7. Continuous-Time Quantum Monte Carlo Approach for Impurity Anderson Models with Phonon-Assisted
Hybridizations: K. Hattori, J. Phys. Soc. Jpn. 82 (2013) 064709 (5 pages).
8. Exotic disordered phases in the quantum J1-J2 model on the honeycomb lattice: H. Zhang and C. A. Lamas, Phys. Rev.
B 87 (2013) 024415 (10 pages).
9. p-wave superconductivity near a transverse saturation field: K. Hattori and H. Tsunetsugu, Phys. Rev. B 87 (2013)064501 (5 pages).

Kohmoto group
Twisted bilayer graphen is studied. Especially energy versus magnetic field shows a fractal Hofstadter butterfly. Since
supercell is large one can expect nontrivial Hall conductance (TKNN integer) may be observed in a high magnetic field
experiment. Also edge states at the interface between monolayer and bilayer are studied and its properties of applied
electric field is clarified. Fibonacci optical lattice are studied and it is shown that soliton states and critical states can coexist
multifractal analysis.
1. Electric-field Induced Penetration of Edge States at the Interface between Monolayer and Bilayer Graphene: Y.
Hasegawa and M. Kohmoto, Phys. Rev. B 85 (2012) 125430(1-9).
2. Multifractals Competing with Solitons on Fibonacci Optical Lattices: M. Takahashi, H. Katsura, M. Kohmoto and T.
Koma, New J. Phys. 14 (2012) 113012-113027.
3. Time-Reversal Symmetry in Non-Hermitian Systems: M. Sato, K. Hasebe, K. Esaki and M. Kohmoto, Prog. Theor.
Phys. 127 (2012) 937-974.
4. Theory of tunneling conductance and surface-state transition in superconducting topological insulators: A. Yamakage,
K. Yada, M. Sato and Y. Tanaka, Phys. Rev. B 85 (2012) 180509(R)(1-5).
5. Topological Field Theory for p-wave Superconductors: T. H. Hansson, A. Karlhede and M. Sato, New J. Phys. 14(2012) 063017(10pages).
6. Symmetry and Topology in Superconductors —Odd-Frequency Pairing and Edge States—: Y. Tanaka, M. Sato and N.
Nagaosa, J. Phys. Soc. Jpn. 81 (2012) 011013(1-34).

Sugino group
The activity of Sugino group consists of (1) investigation of the property of materials related to energy-conversion, (2)developing density functional methods for computing dynamical process in matters, and (3) developing a many-body scheme
to calculate the ground-state and the excited-state energies. Particularly, there was breakthrough in the algorithm of handlingthe many-body wavefunctions, possibly leading to one of the post density functional theories (post-DFT).
1. Possible magnetic behavior in oxygen-deficient β -PtO2 : Y. Yang, O. Sugino and T. Ohno, Phys. Rev. B 85 (2012)
035204(1-13).
2. First-Principles Molecular Dynamics at a Constant Electrode Potential: N. Bonnet, T. Morishita, O. Sugino and M.
Otani, Phys. Rev. Lett. 109 (2012) 266101(1-5).

3. Symmetric Tensor Decomposition Description of Fermionic Many-Body Wave Functions: W. Uemura and O. Sugino,
Phys. Rev. Lett. 109 (2012) 253001(1-5).
4. A GW+Bethe-Salpeter calculation on photoabsorption spectra of (CdSe)3 and (CdSe)6 clusters: Y. Noguchi, O. Sugino,
M. Nagaoka, S. Ishii and K. Ohno, J. Chem. Phys. 137 (2012) 024306 (1-5).
5. Analytical expression for the excited-state force from density-functional perturbation theory: T. Tsukagoshi and O.
Sugino, Phys. Rev. A 86 (2012) 064501(1-4).
6. Quantum dissipative dynamics using the Doebner–Goldin equation: T. Tsukagoshi and O. Sugino, Physics Letters A
376 (2012) 3033-3037.
7. Band gap of β -PtO2 from first-principles: Y. Yang, O. Sugino and T. Ohno, AIP Advances 2 (2012) 022172(1-7).
8. The charged interface between Pt and water: First principles molecular dynamics simulations: T. Ikeshoji, M. Otani, I.
Hamada, O. Sugino, Y. Morikawa, Y. Okamoto, Y. Qian and I. Yagi, AIP Advances 2 (2012) 032182(1-10).
9. Nonadiabatic couplings from time-dependent density functional theory: Formulation by the Kohn-Sham derivative
matrix within density functional perturbation theory: C. Hu, T. Tsukagoshi, O. Sugino and K. Watanabe, Phys. Rev. B
87 (2013) 035421(1-7).
10. Electronic structures of oxygen-deficient Ta2 O5 : Y. Yang, H.-H. Nahm, O. Sugino and T. Ohno, AIP Advances 3 (2013)
042101(1-8).

Kato group
The main research subject in our laboratory is theory of nonequilibrium properties in nanoscale devices. We have studied
nonequilibrium noise of the Kondo regime in quantum dot systems by considering effect of Hund’s exchange interaction, andpurity of single photons in semiconductor microcavity. Dielectric properties in ferroelectric relaxors made from perovskite
oxides have been studied by the Monte Carlo method. We have also studied spin diffusion length in normal metals in thecontext of anti-localization analysis in collaboration with Otani group.
1. ∗ Coulomb Frustrated Phase Separation in Quasi-Two-Dimensional Organic Conductors on the Verge of Charge
Ordering: K. Yoshimi and H. Maebashi, J. Phys. Soc. Jpn. 81 (2012) 063003(1-4).
2. Full Counting Statistics for Orbital-Degenerate Impurity Anderson Model with Hund’s Rule Exchange Coupling: R.
Sakano, Y. Nishikawa, A. Oguri, A. C. Hewson and S. Tarucha, Phys. Rev. Lett. 108 (2012) 266401(1-5).
3. Properties of a Single Photon Generated by a Solid-State Emitter: Effects of Pure Dephasing: E. Iyoda, T. Kato, T.
Aoki, K. Edamatsu and K. Koshino, J. Phys. Soc. Jpn. 82 (2013) 014301(1-10).
4. Relaxor Behavior and Morphotropic Phase Boundary in a Simple Model: Y. Tomita and T. Kato, J. Phys. Soc. Jpn. 82(2013) 063002(1-5).
5. 量子ドットの近藤効果による非平衡電流の完全係数統計: 阪野 塁, 小栗 章, 小林 研介, 固体物理 47 (2013) 475-485.

Division of Nanoscale ScienceIye group
Thermoelectric effect in GaAs/AlGaAs 2DEG in the quantum Hall regime is studied by using a Corbino geometry.
Thermopower generally contains contributions from two distinct mechanisms: diffusion and phonon drag. In order toselectively extract the diffusion contribution, microwave-heating technique is used to raise the electron temperature withthe lattice temperature kept at the bath temperature. The measurement of the diagonal thermpower Srr provides a unique
opportunity to probe the entropy of the system in the QH plateau regions. The measured Srr takes large values on the orderof 1 meV/K in the regions where σ rr = 0, alternating the sign at exact even integer fillings, in accordance with the theoreticalprediction.
1. ∗ Geometric resonances in the magnetoresistance of hexagonal lateral superlattices: Y. Kato, A. Endo, S. Katsumoto
and Y. Iye, Phys. Rev. B 86 (2012) 235315(1-10).
2. ∗ Magnetization dependent rectification in (Ga,Mn)As tri-layer tunnel junctions: Y. Hashimoto, H. Amano, Y. Iye and
S. Katsumoto, J. Phys.: Conf. Ser. 400 (2012) 042016(1-4).

3. ∗ Novel blockade due to spin-filtering with spin-orbit interaction: S. W. Kim, Y. Hashimto, Y. Iye and S. Katsumoto, J.
Phys.: Conf. Ser. 400 (2012) 042032(1-4).
4. ∗ Suppression of Andreev current due to transverse current flow in an InAs two-dimensional electrons: Y. Takahashi, Y.
Hashimoto, Y. Iye and S. Katsumoto, Journal of Crystal Growth 378 (2013) S0022024813000705(1-4).
5. ∗ Control of magnetic anisotropy in (Ga,Mn)As with etching depth of specimen boundaries: Y. Hashimoto, Y. Iye and
S. Katsumoto, J. Cryst. Growth 378 (2013) S0022024812008329(1-4).
6. Commensurability oscillations in the rf conductivity of unidirectional lateral superlattices: measurement of anisotropic
conductivity by coplanar waveguide: A. Endo, T. Kajioka and Y. Iye, J. Phys. Soc. Jpn 82 (2013) 054710(1-7).
7. Diffusion Thermopower of Quantum Hall States Measured in Corbino Geometry: S. Kobayakawa, A. Endo and Y. Iye,
J. Phys. Soc. Jpn 82 (2013) 053702(1-4).

Katsumoto group
We have investigated the supercurrent through semiconductor 2-dimensional systems by applying spin current created withthe spin Hall effect. We found the superconductivity established through the formation of the Andreev bound states iseasily broken by small amount of spin current. This phenomenon seems to be promising in the application to low energy
consumption logic devices.
1. Evidence of Spin-Filtering in Quantum Constrictions with Spin-Orbit Interaction: S. W. Kim, Y. Hashimoto, Y. Iye and
S. Katsumoto, J. Phys. Soc. Jpn. 81 (2012) 054706 (1-5).
2. Detection of spin polarization utilizing singlet and triplet states in a single-lead quantum dot: T. Otsuka, Y. Sugihara,
J. Yoneda, S. Katsumoto and S. Tarucha, Phys. Rev. B 86 (2012) 081308(1-4).
3. ∗ Geometric resonances in the magnetoresistance of hexagonal lateral superlattices: Y. Kato, A. Endo, S. Katsumoto
and Y. Iye, Phys. Rev. B 86 (2012) 235315(1-10).
4. ∗ Magnetization dependent rectification in (Ga,Mn)As tri-layer tunnel junctions: Y. Hashimoto, H. Amano, Y. Iye and
S. Katsumoto, J. Phys.: Conf. Ser. 400 (2012) 042016(1-4).
5. ∗ Novel blockade due to spin-filtering with spin-orbit interaction: S. W. Kim, Y. Hashimto, Y. Iye and S. Katsumoto, J.
Phys.: Conf. Ser. 400 (2012) 042032(1-4).
6. Robustness of spin filtering against current leakage in a Rashba-Dresselhaus-Aharonov-Bohm interferometer: S.
Matityahu, A. Aharony, O. Entin-Wohlman and S. Katsumoto, Phys. Rev. B 87 (2013) 205438(1-8).
7. ∗ Suppression of Andreev current due to transverse current flow in an InAs two-dimensional electrons: Y. Takahashi, Y.
Hashimoto, Y. Iye and S. Katsumoto, Journal of Crystal Growth 378 (2013) S0022024813000705(1-4).
8. ∗ Control of magnetic anisotropy in (Ga,Mn)As with etching depth of specimen boundaries: Y. Hashimoto, Y. Iye and
S. Katsumoto, J. Cryst. Growth 378 (2013) S0022024812008329(1-4).
9. Energy level spectroscopy of a quantum dot with a side‐coupled satellite dot: S. W. Kim, Y. Kuwabara, T. Otsuka, Y.
Iye and S. Katsumoto, in: AIP Conference Proceedings, edited by Jisoon Ihm, Hyeonsik Cheong (American Instituteof Physics, 2012), 393-394.

Otani group
This year we put our focus on the following three topics including the skew scattering mechanism of spin Hall effects, spin
relaxation mechanism in lateral spin valve structures, and collective dynamics of coupled magnetic vortices. Concerning thefirst topic, we have performed collaborative research with German and French groups to find best combination of materials to
induce large spin Hall effects originating from the skew scattering mechanisms. Based on these theoretical studies we havesucceeded in demonstrating the giant spin Hall effect by doping copper with small amount of bismuth. Apart from the skew
scattering studies, we have shown for the first time a possibility to use spin Hall effect as a means to detect higher order spin
fluctuation. As to the second topic on the lateral spin valve, we have found the contribution of the surface spin flip scattering
was non-negligible at low temperatures and was suppressed significantly by the surface capping layer of MgO. Thereby
we were able to clarify that the spin relaxation process was well described in the framework of Elliot-Yafet mechanism.
Furthermore we have demonstrated the non-local spin valve effect in the lateral spin valve structure consisting of siliconnano-wire and permalloy. As to the third topic on vortex dynamics, our final goal is to realize magnonic crystals. For this, wehave been studying collective spin dynamics mediated by the dynamic dipolar interaction. When the nano-scale ferromagnetic

elements are very closely spaced with a separation of 50 nm, a gradual transition from completely uniform collective regime
to a completely non-collective regime was observed as the azimuthal angle varies from 0◦ to 45◦ .
1. Anisotropy in collective precessional dynamics in arrays of Ni80 Fe20 nanoelements: B. Rana, D. Kumar, S. Barman, S.
Pal, R. Mandal, Y. Fukuma, Y. Otani, S. Sugimoto and A. Barman, J. Appl. Phys. 111 (2012) 07D503(1-3).
2. Nonlinear motion of magnetic vortex cores during fast magnetic pulses: K. Fukumoto, K. Arai, T. Kimura, Y. Otani
and T. Kinoshita, Phys. Rev. B 85 (2012) 134414(1-4).
3. Giant Spin Hall Effect Induced by Skew Scattering from Bismuth Impurities inside Thin Film CuBi Alloys: Y. Niimi,
Y. Kawanishi, D. H. Wei, C. Deranlot, H. X. Yang, M. Chshiev, T. Valet, A. Fert and Y. Otani, Phys. Rev. Lett. 109(2012) 156602(1-5).
4. Spin relaxation mechanism in silver nanowires covered with MgO protection layer: H. Idzuchi, Y. Fukuma, L. Wang
and Y. Otani, Appl. Phys. Lett. 101 (2012) 022415(1-4).
5. Temperature Evolution of Spin-Polarized Electron Tunneling in Silicon Nanowire–Permalloy Lateral Spin Valve
System: J. Tarun, S. Huang, Y. Fukuma, H. Idzuchi, Y. Otani, N. Fukata, K. Ishibashi and S. Oda, Appl. Phys.
Express 5 (2012) 045001(1-3).
6. Optically Induced Tunable Magnetization Dynamics in Nanoscale Co Antidot Lattices: R. Mandal, S. Saha, D. Kumar,
S. Barman, S. Pal, K. Das, A. K. Raychaudhuri, Y. Fukuma, Y. Otani and A. Barman, ACS Nano 6 (2012) 3397-3403.
7. The spin Hall effect as a probe of nonlinear spin fluctuations: D. H. Wei, Y. Niimi, B. Gu, T. Ziman, S. Maekawa andY. Otani, Nature Commun. 3 (2012) 1058(1-5).
8. Towards coherent spin precession in pure-spin current: H. Idzuchi, Y. Fukuma and Y. Otani, Sci. Rep. 2 (2012)
628(1-5).
9. Perfect Alloys for Spin Hall Current-Induced Magnetization Switching: M. Gradhand, D. V. Fedorov, P. Zahn, I.
Mertig, Y. Otani, Y. Niimi, L. Vila and A. Fert, SPIN 02 (2012) 1250010(1-8).

Komori group
Electronic and atomic structures of the Au-adsorbed Ge(111) surface are studied by ARPES and STM. A triangle structure,
which is mobile at room temperature on the surface, selectively dopes the electron-like metallic surface band. A band gap
over 0.3 eV was found by ARPES in a regular array of the graphene nanoribbons that were formed selectively on the terraceof vicinal SiC(0001) surfaces by molecular beam epitaxy. The width of each nanoribbon is 10 nm. The gap size increases
with decreasing the width of the nanoribbons. Regular arrays of square CrN islands were thermally fabricated on the Cu(001)surface. A short-range attractive interaction among the islands is the origin of the self-assembly.
1. † Uniaxial deformation of graphene Dirac cone on a vicinal SiC substrate: K. Nakatsuji, T. Yoshimura, F. Komori, K.
Morita and S. Tanaka, Phys. Rev. B 85 (2012) 195416(1-6).
2. ∗ Epitaxial Rh-doped SrTiO3 thin film photocathode for water splitting under visible light irradiation: S. Kawasaki, K.
Nakatsuji, J. Yoshinobu, F. Komori, R. Takahashi, M. Lippmaa, K. Mase and A. Kudo, Appl. Phys. Lett. 101 (2012)
033910 (1-4).
3. ∗ Elucidation of Rh-Induced In-Gap States of Rh:SrTiO3 Visible-Light-Driven Photocatalyst by Soft X-ray
Spectroscopy and First-Principles Calculations: S. Kawasaki, K. Akagi, K. Nakatsuji, S. Yamamoto, I. Matsuda, Y.
Harada, J. Yoshinobu, F. Komori, R. Takahashi, M. Lippmaa, C. Sakai, H. Niwa, M. Oshima, K. Iwashina and A.
Kudo, J. Phys. Chem. C 116 (2012) 24445-24448.
√√
4. Selective doping in a surface band and atomic structures of the Ge(111) ( 3 × 3)R30◦ –Au surface: K. Nakatsuji, Y.
Motomura, R. Niikura and F. Komori, J. Phys.: Condens. Matter 25 (2013) 045007 (9).
5. Fabrication and characterization of strain-driven self-assembled CrN nanoislands on Cu(001): P. Krukowski, T. Iimori,K. Nakatsuji, M. Yamada and F. Komori, J. Appl. Phys. 113 (2013) 174309 (5).
6. † Graphene nanoribbons on vicinal SiC surfaces by molecular beam epitaxy: T. Kajiwara, Y. Nakamori, A. Visikovskiy,
T. Iimori, F. Komori, K. Nakatsuji, K. Mase and S. Tanaka, Phys. Rev. B 87 (2013) 121407R (4).
7. Growth and structure of CrN nanoislands on Cu(001) studied by scanning tunneling microscopy and X-ray
photoemission spectroscopy: P. Krukowski, T. Iimori, K. Nakatsuji, M. Yamada and F. Komori, Thin Solid Films
531 (2013) 251-254.

8. † エピタキシャルグラフェンの成長と電子物性: 田中 悟, 中辻 寛, 小森 文夫, 日比野 浩樹, 触媒 54 (2012) 386-391.
9. 表面磁性: 小森 文夫, 「現代表面科学シリーズ 3 巻 表面物性」, 第 4 章, 坂本 一之, (共立出版, 東京都文京区小日
向 4 丁目 6 番 19 号, 2012), 132-172.
10. エピタキシャルグラフェンの電子状態: 中辻 寛, 小森 文夫, 「ポストシリコン半導体-ナノ成膜ダイナミクスと基板・界面効果-」, 6 章 2.2, 財満 鎮明, (NTS, 東京都文京区湯島 2-16-16, 2013), in print.

Yoshinobu group
We conducted several research projects in the fiscal year 2012. (1) The kinetic and geometric isotope effects and energy-levelalignment of cyclohexane on clean and H-preadsorbed Rh(111) surfaces using IRAS, TPD, STM, SPA-LEED and SR-PES.
(2) The adsorption states of CO2 on Cu(997) studied by SR-PES and IRAS. (3) The thin file growth and electronic statesof pentacene film on chemically modified Si(100) surfaces using PES and 4-probe surface conductivity measurements. (4)Spectroscopic characterization and transport properties of aromatic monolayers covalently attached to Si(111) surfaces by
wet-chemical methods.
1. ∗ Epitaxial Rh-doped SrTiO3 thin film photocathode for water splitting under visible light irradiation: S. Kawasaki, K.
Nakatsuji, J. Yoshinobu, F. Komori, R. Takahashi, M. Lippmaa, K. Mase and A. Kudo, Appl. Phys. Lett. 101 (2012)
033910 (1-4).
2. Kinetic and geometric isotope effects originating from different potential energy surfaces: cyclohexane on Rh(111): T.
Koitaya, S. Shimizu, K. Mukai, S. Yoshimoto and J. Yoshinobu, J. Chem. Phys. 136 (2012) 214705 (9 pages).
3. ∗ Elucidation of Rh-Induced In-Gap States of Rh:SrTiO3 Visible-Light-Driven Photocatalyst by Soft X-ray
Spectroscopy and First-Principles Calculations: S. Kawasaki, K. Akagi, K. Nakatsuji, S. Yamamoto, I. Matsuda, Y.
Harada, J. Yoshinobu, F. Komori, R. Takahashi, M. Lippmaa, C. Sakai, H. Niwa, M. Oshima, K. Iwashina and A.
Kudo, J. Phys. Chem. C 116 (2012) 24445-24448.
4. Chemically homogeneous and thermally reversible oxidation of epitaxial graphene: Md. Zakir Hossain, J. E. Johns, K.
H. Bevan, H. J. Karmel, Y. T. Liang, S. Yoshimoto, K. Mukai, T. Koitaya, J. Yoshinobu, M. Kawai, A. M. Lear, L. L.
Kesmodel, S. L. Tait and M. C. Hersam, Nature Chem. 4 (2012) 305-309.
5. Energy level alignment of cyclohexane on Rh(111): the importance of interfacial dipole and final-state screening: T.
Koitaya, K. Mukai, S. Yoshimoto and J. Yoshinobu, J. Chem. Phys. 138 (2013) 044702 (9 pages).
6. Site-specific chemical states of adsorbed CO on Pt(997): a high resolution XPS study: S. Shimizu, H. Noritake, T.
Koitaya, K. Mukai, S. Yoshimoto and J. Yoshinobu, Surf. Sci. 608 (2013) 220-225.
7. Spectroscopic Characterization and Transport Properties of Aromatic Monolayers Covalently Attached to Si(111)
Surfaces: Y. Harada, T. Koitaya, K. Mukai, S. Yoshimoto and J. Yoshinobu, J. Phys. Chem. C 117 (2013) 7497-7505.
8. 「読書のススメ」: 吉信 淳, 化学 Vol.67 (2012) 58.
9. Potential Energy Surface of NO on Pt(997): Adsorbed States and Surface Diffusion: N. Tsukahara and J. Yoshinobu,
Advances in Physical Chemistry 2012 (2012) Article ID 571657 (9 pages).

Hasegawa group
We have developed spin-polarized scanning tunneling microscopy (SP-STM), and studied magnetic properties of nano-size
Co island structures, whose dimension ranges 10-30 nm in lateral size and 1 nm in thickness, formed on Ag(111). From
the Moiré intensities observed in STM images, we found two structurally different Co islands on the substrate. Magnetic
properties revealed by the SP-STM are also different; one has an out-of-plane magnetization while the other does not. As
pristine hcp Co has strong magnetocrystalline anisotropy along the c-axis whereas in fcc Co thin films shape anisotropy
prefers in-plane magnetization, we assign the two structures as hcp and fcc Co structures, respectively. We also developed ascanning potentiometry, which enables us to visualize nanoscale spatial distribution of electrical potential under current flow.
The potential drops due to finite electrical resistance at grain boundaries were clearly observed in a Au thin film. The method
will be applied to two-dimensional surface electron systems that show superconductivity at low temperatures.
1. Thermally assisted penetration and exclusion of single vortex in mesoscopic superconductors: S.-Z. Lin, T. Nishio, L.
Bulaevskii, M. Graf and Y. Hasegawa, Phys. Rev. B 85 (2012) 134534(1-7).
2. Development of Scanning Tunneling Potentiometry for Semiconducting Samples: M. Hamada and Y. Hasegawa, Jpn.
J. Appl. Phys. 51 (2012) 125202.

3. 電子定在波とフリーデル振動: 長谷川 幸雄, 小野 雅紀, 鈴木 孝将, 江口 豊明, 日本物理学会誌 67 (2012) 6-13.
4. Observation of Vortex Clustering in Nano-Size Superconducting Pb Island Structures by Low-Temperature Scanning
Tunneling Microscopy/ Spectroscopy: T. Tominaga, T. Sakamoto, T. Nishio, T. An, T. Eguchi, Y. Yoshida and Y.
Hasegawa, J. Supercond. Nov. Magn. 25 (2012) 1375-1378.
5. 放射光励起走査トンネル顕微鏡による高分解能元素分析: 江口豊 明・奥田太一・木下豊彦・長谷川幸雄, 顕微鏡
47 (2012) 14-17.
6. Trapping and squeezing of vortices in voids directly observed by scanning tunneling microscopy and spectroscopy: T.
Tominaga, T. Sakamoto, H. Kim, T. Nishio, T. Eguchi and Y. Hasegawa, Phys. Rev. B 87 (2013) 195434.
7. 低温走査トンネル顕微鏡によるナノサイズ超伝導体の研究: 坂本 崇樹, 富永 貴亮, 西尾 隆宏, 江口 豊明, 吉田 靖
雄, 長谷川 幸雄, 表面科学 33 (2012) 443-448.

Lippmaa group
This year saw progress on three main fronts: photocatalytic materials, spin filters, and the pyroelectric analysis offerroelectrics. In the catalyst project, we analyzed the electronic structure of Rh:doped SrTiO3 and showed that the valence
state of the Rh dopant can be controlled by a suitable selection of crystal growth parameters. The presence of a mid-gap
acceptor state in Rh4+ :SrTiO3 was confirmed, explaining the reduced solar energy conversion efficiency. The tunnel junction
project culminated with a successful construction of spin-filter tunnel junctions based on ferromagnetic insulator barrier
layers. Record-making magnetoresistance ratios were observed in the tunnel junctions. A pyroelectric analysis system wasused to analyze the presence of ferroelectricity in Magnetite thin films. A new buffer layer technique was developed for
growing perfectly oriented magnetite thin films.
1. Sub-bandgap photocurrent effects on dynamic pyroelectric measurement in Pt/PbTiO3 /Nb:SrTiO3 heterostructures: R.
Takahashi, T. Tybell and M. Lippmaa, J. Appl. Phys. 112 (2012) 014111(1-6).
2. Pyroelectric detection of spontaneous polarization in magnetite thin films: R. Takahashi, H. Misumi and M. Lippmaa,
Phys. Rev. B 86 (2012) 144105 (1-7).
3. Development of a new laser heating system for thin film growth by chemical vapor deposition: E. Fujimoto, M. Sumiya,
T. Ohnishi, M. Lippmaa, M. Takeguchi, H. Koinuma and Y. Matsumoto, Rev. Sci. Instrum. 83 (2012) 094701(1-6).
4. Spin-Filter Tunnel Junction with Matched Fermi Surfaces: T. Harada, I. Ohkubo, M. Lippmaa, Y. Sakurai, Y.
Matsumoto, S. Muto, H. Koinuma and M. Oshima, Phys. Rev. Lett. 109 (2012) 076602(1-5).
5. ∗ Epitaxial Rh-doped SrTiO3 thin film photocathode for water splitting under visible light irradiation: S. Kawasaki, K.
Nakatsuji, J. Yoshinobu, F. Komori, R. Takahashi, M. Lippmaa, K. Mase and A. Kudo, Appl. Phys. Lett. 101 (2012)
033910 (1-4).
6. ∗ Elucidation of Rh-Induced In-Gap States of Rh:SrTiO3 Visible-Light-Driven Photocatalyst by Soft X-ray
Spectroscopy and First-Principles Calculations: S. Kawasaki, K. Akagi, K. Nakatsuji, S. Yamamoto, I. Matsuda, Y.
Harada, J. Yoshinobu, F. Komori, R. Takahashi, M. Lippmaa, C. Sakai, H. Niwa, M. Oshima, K. Iwashina and A.
Kudo, J. Phys. Chem. C 116 (2012) 24445-24448.
7. Self-Template Growth of Orientation-Controlled Fe3 O4 Thin Films: R. Takahashi, H. Misumi and M. Lippmaa, Cryst.
Growth Des. 12 (2012) 2679-2683.
8. † Photo-Electrochemical Synthesis of Silver-Oxide Clathrate Ag7 O8 NO3 on SrTiO3 : R. Tanaka, S. Takata, R.
Takahashi, J. K. Grepstad, T. Tybell and Y. Matsumoto, Electrochem. Solid-State Lett. 15 (2012) E19-E22.
9. Large Tunnel Magnetoresistance in Epitaxial Oxide Spin-Filter Tunnel Junctions: T. Harada, I. Ohkubo, M. Lippmaa,
Y. Sakurai, Y. Matsumoto, S. Muto, H. Koinuma and M. Oshima, Adv. Funct. Mater. 22 (2012) 4471-4475.
10. Nonmagnetic Sc Substitution in a Perovskite Ferromagnetic Insulator Pr0.8 Ca0.2 MnO3 : T. Harada, R. Takahashi and
M. Lippmaa, J. Phys. Soc. Jpn. 82 (2013) 014801 (1-5).
11. Combinatorial Nanoscience and Technology for Solid-state Materials: H. Koinuma, R. Takahashi, M. Lippmaa, S.-Y.
Jeong, Y. Matsumoto, T. Chikyo and S. Suzuki, in: Handbook of Advanced Ceramics, Ch 11.1.11, edited by S. Somiya,(Academic Press, Amsterdam, 2013), 1103-1124.

Division of Physics in Extreme Conditions
Uwatoko groupWe report the discovery of a pressure-induced heavy fermion superconductivity in a nonmagnetic orbital ordering state in the
cubic compound PrTi2 Al20 . The strong orbital fluctuations may provide a nonmagnetic glue for Cooper pairing. The results
suggest a generic phase diagram hosting unconventional superconductivity on the border of orbital order, paving a newpath for further research on novel quantum criticality and superconductivity due to orbital fluctuations. We have performed
XAS, NMR, magnetization measurements in relatively large fields and specific heat up to 3 T on heavy fermion YbCo2 Zn20
to investigate the possibility that magnetic field gives rise to the delocalization of 4f electrons. Correlations between Yb
moments are weak without significant enhancement in the χ (q) spectrum at least in a field, which may explain the lackof magnetic order in YbCo2 Zn20 in spite of the existence of distinct local moments. We measured the microwave surface
impedances and obtained the superfluid density and flux flow resistivity in single crystals of a phosphor-doped iron-based
superconductor SrFe2 (As0.7 P0.3 )2 single crystals (TC = 25 K). These results indicate the presences of line nodes on at least
one band and modulated nodeless gap with deep minimum on the same bands and or other bands. We report a comprehensive
high-pressure study on the triple-layer T’-La4 Ni3 O8 with a suite of experimental probes, including structure determination,
magnetic, and transport properties up to 50 GPa. The presence of isolated Ni sites with apical oxygen in the T’ structureleads to a variable-range-hopping conductivity in the LS phase. The high pressure structural study reveals that a new T+
structure is stabilized under P>21 GPa. We have performed inelastic neutron scattering measurements in the ferroelectric
noncollinear magnetic phase of CuFe0.965 Ga0.035 O2 under applied uniaxial pressure. The reduction of the spin-latticecoupling, which reflects the partial release of the magnetic frustration due to the nonmagnetic substitution, can also contributeto the emergence of the noncollinear incommensurate magnetic ground state. We have measured the temperature-dependent
resistivity of (TMTTF)2 PF6 up to 7 GPa using a turnbuckle-type diamond anvil cell (DAC) and at magnetic fields of up to
5 T. The Ginzburg–Landau coherence lengths for three different axes obtained from this work show that (TMTTF)2 PF6 isan anisotropic three-dimensional superconductor. We have developed a high-pressure and high-field ESR system using the
combination of a commercially available SQUID magnetometer up to 5 T and a clamp-type piston cylinder pressure cell up
to 1.5 GPa.
1. ∗ Block magnetism coupled with local distortion in the iron-based spin-ladder compound BaFe2 Se3 : Y. Nambu, K.
Ohgushi, S. Suzuki, F. Du, M. Avdeev, Y. Uwatoko, K. Munakata, H. Fukazawa, S. Chi, Y. Ueda and T. Sato, Phys.
Rev. B 85 (2012) 064413(1-5).
2. Effect of pressure on the neutron spin resonance in the unconventional superconductor FeTe0.6 Se0.4 : K. Marty, A. D.
Christianson, A. M. dos Santos, B. Sipos, K. Matsubayashi, Y. Uwatoko, J. A. Fernandez-Baca, C. A. Tulk, T. A.
Maier, B. C. Sales and M. D. Lumsden, Phys. Rev. B 86 (2012) 220509(1-5).
3. † Investigation of the superconducting gap structure in SrFe2 (As0.7 P0.3 )2 by magnetic penetration depth and flux flow
resistivity analysis: H. Takahashi, T. Okada, Y. Imai, K. Kitagawa, K. Matsubayashi, Y. Uwatoko and A. Maeda, Phys.
Rev. B 86 (2012) 144525(1-5).
4. Magnetic anisotropy of Kondo semiconductor CeT2 Al10 (T = Ru,Os) in the ordered state: H. Tanida, Y. Nonaka, D.
Tanaka, M. Sera, Y. Kawamura, Y. Uwatoko, T. Nishioka and M. Matsumura, Phys. Rev. B 85 (2012) 205208(1-11).
5. Magnetic interactions in the multiferroic phase of CuFe1−x Gax O2 (x=0.035) refined by inelastic neutron scattering withuniaxial-pressure control of domain structure: T. Nakajima, S. Mitsuda, J. T. Haraldsen, R. S. Fishman, T. Hong, N.
Terada and Y. Uwatoko, Phys. Rev. B 85 (2012) 144405 (1-7 ).
6. Microwave surface-impedance measurements of the electronic state and dissipation of magnetic vortices insuperconducting LiFeAs single crystals: T. Okada, H. Takahashi, Y. Imai, K. Kitagawa, K. Matsubayashi, Y. Uwatoko
and A. Yamada, Phys. Rev. B 2 (2012) 064516 (1-5 ).
7. Weakly ferromagnetic metallic state in heavily doped Ba1−x Kx Mn2 As2 : JK. Bao, H. Jiang, YL. Sun, WH. Jiao, CY.
Shen, HJ. Guo, Y. Chen, CM. Feng, HQ. Yuan, ZA. Xu, GH. Cao, R. Sasaki, T. Tanaka, K. Matsubayashi and Y.
Uwatoko, Phys. Rev. B 85 (2012) 144523(1-6).
8. ∗ Pressure-Induced Heavy Fermion Superconductivity in the Nonmagnetic Quadrupolar System PrTi2 Al20 : K.
Matsubayashi, T. Tanaka, A. Sakai, S. Nakatsuji, Y. Kubo and Y. Uwatoko, Phys. Rev. Lett. 109 (2012) 187004(1-5).
9. † Correlation between superconductivity and structural properties under high pressure of iron pnictide superconductor
Ce0.6 Y0.4 FeAsO0.8 F0.2 : M. Kanagaraj, S. Arumugam, RS. Kumar, NRT. Selvan, SE. Muthu, H. Yoshino, K. Murata,
K. Matsubayashi, Y. Uwatoko, S. Sinogeikin, A. Cornelius, AK. Ganguli and YS. Zhao, Appl. Phys. Lett. 100 (2012)052601(1-4).

10. Conductivity and Incommensurate Antiferromagnetism of Fe1.02 Se0.10 Te0.90 under pressure: N. Katayama, K.
Matsubayashi, Y. Nomura, S. J. Leao, M. A. Green, T. J. Sato, Y. Uwatoko, M. Fujita, K. Yamada, R. Arita and S.
H. Lee, Europhys. Lett. 98 (2012) 37002 (1-6).
11. † Uniaxial-stress enhancement of spin-driven ferroelectric polarization in a multiferroic CuFe1−x Gax O2 : S. Mitsuda, K.
Yoshitomi, T. Nakajima, C. Kaneko, H. Yamazaki, M. Kosaka, N. Aso, Y. Uwatoko, Y. Noda, M. Matsuura, N. Terada,
S. Wakimoto, M. Takeda and K. Kakurai, J. Phys.: Conf. Series 340 (2012) 012062(1-8).
12. Uniaxial-Pressure Control of Magnetic Phase Transitions in a Frustrated Magnet CuFe1−x Gax O2 (x=0, 0.018): T.
Nakajima, S. Mitsuda, K. Takahashi, K. Yoshitomi, K. Masuda, C. Kaneko, Y. Honma, S. Kobayashi, H. Kitazawa,
M. Kosaka, N. Aso, Y. Uwatoko, N. Terada, S. Wakimoto, M. Takeda and K. Kakurai, J. Phys. Soc. Jpn 81 (2012)
094710(1-8).
13. Heat Capacity Measurement of Heavy Fermion YbCo2 Zn20 under Magnetic Field: R. Yamanaka, K. Matsubayashi, Y.
Saiga, T. Kawae and Y. Uwatoko, J. Phys.: Conf. Ser. 391 (2012) 012078.
14. † Anisotropy of Upper Critical Field in a One-Dimensional Organic System, (TMTTF)2 PF6 under High
Pressure:
M. Kano, M. Hatsumi, K. Matsubayashi, M. Itoi, M. Hedo, T. P. Murphy, S. W. Tozer, Y. Uwatoko and T. Nakamura,
J. Phys. Soc. Jpn. 81 (2012) 024716 (1-7).
15. † Magnetic Properties of TbPd2 Si2 Single Crystal: Y. Zhang, T. Fujiwara, Y. Uwatoko and T. Shigeoka, J. Phys. Soc.
Jpn. 81 (2012) 044702(1-5).
16. Mechanism of Field Induced Fermi Liquid State in Yb-Based Heavy-Fermion Compound: X-ray Absorption
Spectroscopy and Nuclear Magnetic Resonance Studies of YbCo2 Zn20 : T. Mito, T. Koyama, K. Nakagawara, T. Ishida,
K. Ueda, T. Kohara, K. Matsubayashi, Y. Saiga, K. Munakata, Y. Uwatoko, M. Mizumaki, N. Kawamura, B. Idzikowski
and M. Reiffers, J. Phys. Soc. Jpn. 81 (2012) 033706(1-4).
17. Pressure effects on the superconducting transition of ytterbium doped Ce0.6 Yb0.4 FeAsO0.9 F0.1 : S. Arumugam, M.
Kanagaraj, N. R. T. Selvan, S. E. Muthu, J. Prakash, G. S. Thakur, A. K. Ganguli, H. Yoshino, K. Murata, K.
Matsubayashi and Y. Uwatoko, Phys. Status Solidi: Rapid Res. Lett. 6 (2012) 220-222.
18. Scanning tunneling microscopy/spectroscopy of vortices in LiFeAs: T. Hanaguri, K. Kitagawa, K. Matsubayashi, Y.
Mazaki, Y. Uwatoko and H. Takagi, Phys. Rev. B 85 (2012) 214505(1-9).
19. Pressure-induced positive electrical resistivity coefficient in Ni-Nb-Zr-H glassy alloy: M. Fukuhara, C. Gangli, K.
Matsubayashi and Y. Uwatoko, Appl. Phys. Lett. 100 (2012) 253114(1-3).
20. Pressure Effect on the Structural Transition and Suppression of the High-Spin State in the Triple-Layer T’-La4 Ni3 O8 :J. G. Cheng, J. S. Zhou, J. B. Goodenough, H. D. Zhou, K. Matsubayashi, Y. Uwatoko, P. P. Kong, C. Q. Jin, W. G.
Yang and G. Y. Shen, Phys. Rev. Lett. 108 (2012) 236403(1-5).
21. Development of high-pressure and high-field ESR system using SQUID magnetometer: T. Sakurai, K. Fujimoto, R.
Goto, S. Okubo, H. Ohta and Y. Uwatoko, Journal of Magnetic Resonance 223 (2012) 41-45.
22. †∗ High-Field Phase Diagram of SmRu4 P12 Determined by Ultrasonic Measurements in Pulsed Magnetic Field up to 55
T: M. Yoshizawa, H. Mitamura, F. Shichinomiya, S. Fukuda, Y. Nakanishi, H. Sugawara, T. Sakakibara and K. Kindo,
J. Phys. Soc. Jpn. 82 (2013) 033602(1-5).
23. † Pressure and Substitution Effects on Transport and Magnetic Properties of Y1−x Rx Co2 Systems with Static Magnetic
Disorder: M. Takeda, A. Teruya, S. Watanabe, S. Hirakawa, Y. Hiranaka, A. Nakamura, Y. Takaesu, K. Uchima, M.
Hedo, T. Nakama, K. Yagasaki, K. Matsubayashi, Y. Uwatoko and A. T. Burkov, J. Phys. Soc. Jpn. 82 (2013) 014708(1-6).
24. † Low energy excitations inside the vortex core of LiFe(As, P) single crystals investigated by microwave-surface
impedance: T. Okada, H. Takahashi, Y. Imai, K. Kitagawa, K. Matsubayashi, Y. Uwatoko and A. Maeda, J. Magn.
Magn. Mater. 331 (2013) 98-101.
25. Dielectric properties of single crystal spinels in the series FeV2 O4 , MnV2 O4 , and CoV2 O4 in high magnetic fields: A.
Kismarahadja, J. S. Brooks, H. D. Zhou, E. S. Choi, K. Matsubayashi and Y. Uwatoko, Phys. Rev. B 87 (2013) 054432(1-10).
26. Magnetic properties of spinel CuCrZrS4 under pressure: M. Ito, N. Kado, K. Matsubayashi, Y. Uwatoko, N. Terada, S.
Ebisu and S. Nagata, J. Magn. Magn. Mater 331 (2013) 98-101.
27. † High Field Magnetization of TbPd2 Ge2 Single Crystal: T. Shigeoka, T. Hasegawa, T. Fujiwara, A. Kondo, K. Kindo
and Y. Uwatoko, J. Low. Temp. Phys. 170 (2013) 248-254.

Osada group(1) We have discussed the mechanism of interlayer surface transport due to helical edge state accompanying the quantum Hall
ferromagnetic state in multilayer Dirac fermion systems by employing the tunneling picture. Since this surface state is not
topologically protected, it must be diffusive due to spin-inversion scattering. This fact justifies the tunneling picture, in whichinter-edge tunneling is regarded as a perturbation. We have concluded that the interlayer tunneling due to the helical surface
state is allowed only when the magnetic field is parallel to the side surface of the crystal. (2) We have confirmed the above
theoretical prediction by performing the experiment on organic Dirac fermion system α -(BEDT-TTF)2 I3 . The saturation
odf interlayer resistance occurs when the magnetic field was parallel to the stacking direction. Observed features are well
explained by the above picture. This agreement indicates the appearance of the QH ferromagnetic phase with the helical edge
state in α -(BEDT-TTF)2 I3 .
1. Observation of Angle-Dependent Stark Cyclotron Resonance in a Layered Organic Conductor: A. Kumagai, T.
Konoike, K. Uchida and T. Osada, J. Phys. Soc. Jpn. 81 (2012) 023708(1-4).
2. Specific Heat of the Multilayered Massless Dirac Fermion System: T. Konoike, K. Uchida and T. Osada, J. Phys. Soc.
Jpn. 81 (2012) 043601(1-4).
3. α -(BEDT-TTF)2 I3 におけるディラック電子系の比熱とその磁場効果: 鴻池 貴子, 内田 和人, 長田 俊人, 固体物理
47 (2012) 301-307.
4. Specific heat study of massless Dirac fermion system α -(BEDT-TTF)2 I3 under pressure: T. Konoike, K. Uchida and T.
Osada, Phys. Status Solidi C 9 (2012) 1177-1179.
5. Magnetotransport in organic Dirac fermion system at the quantum limit: Interlayer Hall effect and surface transport via
helical edge states: T. Osada, Phys. Status Solidi B 249 (2012) 962-966.
6. Angle-Dependent Magnetoresistance Oscillations and Charge Density Wave in the Organic Conductor
α -(BEDT-TTF)2 KHg(SCN)4 : K. Uchida, R. Yamaguchi, T. Konoike, T. Osada and W. Kang, J. Phys. Soc. Jpn.
82 (2013) 043714(1-4).
7. 強磁場下電気伝導に現れるサイクロトロン共鳴: 長田 俊人, 熊谷 篤, 内田 和人, 鴻池 貴子, 固体物理 48 (2013)65-73.
8. 角度依存シュタルクサイクロトロン共鳴とその応用: 鴻池 貴子, パリティ 28(4) (2013) 42-45.
9. 角度依存シュタルクサイクロトロン共鳴法の開発: 長田 俊人, パリティ 28(1) (2013) 20-23.
10. グラフェンの量子ホール伝導: 長田 俊人, 「グラフェンの機能と応用展望 II」, 16, 斉木 幸一郎, (シーエムシー出版, 東京, 2012), 169-184.

Materials Design and Characterization Laboratory
Y. Ueda group
The materials mainly studied in 2012 are (1) hollandites, (2) A-site ordered manganites, (3) iron-based spin laddercompounds, and (4) low dimensional or frustrated magnetic materials. The main findings in each material group are (1) novel
structural distortion accompanied by metal-insulator transition in K2 Cr8 O16 and charge order driven by K-vacancy order in
Kx Mn8 O16 , (2) Korringa-like relaxation in YBaMn2 O6 , (3) block and stripelike magnetism in BaFe2 Se3 and CsFe2 Se3 ,respectively, and (4) magnetic phases up to 600 T in ZnCr2 O4 and incomplete devil’s staircase magnetization curve in
SrCu2 (BO3 )2 .
1. ∗ Magnetic Phases of ZnCr2 O4 Revealed by Magneto-Optical Studies under Ultra-High Magnetic Fields up to 600 T:
A. Miyata, H. Ueda, Y. Ueda, Y. Motome, N. Shannon, K. Penc and S. Takeyama, J. Phys. Soc. Jpn. 81 (2012)
114701(1-8).
2. Observation of Structural Change in the Novel Ferromagnetic Metal-Insulator Transition of K2 Cr8 O16 : A. Nakao, Y.
Yamaki, H. Nakao, Y. Murakami, K. Hasegawa, M. Isobe and Y. Ueda, J. Phys. Soc. Jpn. 81 (2012) 054710(1-6).
3. ∗ Synthesis, Structure and Electromagnetic Properties of Manganese Hollandite, Kx Mn8 O16 : T. Kuwabara, M. Isobe,
H. Gotou, T. Yagi, D. Nishio-Hamane and Y. Ueda, J. Phys. Soc. Jpn. 81 (2012) 104701(1-5).
4. Antiferromagnetism in the spin-gap system NaV2 O5 : Muon spin rataion measurements: V. G. Storchak, O. E. Parfenov,
D. G. Eshchenko, R. L. Lichti, P. W. Mengyan, M. Isobe and Y. Ueda, Phys. Rev. B 85 (2012) 094406(1-6).

5. ∗ Block magnetism coupled with local distortion in the iron-based spin-ladder compound BaFe2 Se3 : Y. Nambu, K.
Ohgushi, S. Suzuki, F. Du, M. Avdeev, Y. Uwatoko, K. Munakata, H. Fukazawa, S. Chi, Y. Ueda and T. Sato, Phys.
Rev. B 85 (2012) 064413(1-5).
6. µ SR investigation of magnetically ordered states in the A-site ordered perovskite manganites RBaMn2 O6 (R = Y andLa): Y. Kawasaki, T. Minami, Y. Kishimoto, T. Ohno, K. H. Satoh, A. Koda, R. Kadono, J. L. Gavilano, H. Luetkens,
T. Nakajimna and Y. Ueda, Phys. Rev. B 86 (2012) 125141(1-8).
7. µ + SR study on ferromagnetic hollandites, K2 Cr8 O16 and Rb2 Cr8 O16 : J. Sugiyama, H. Nozaki M. Mänsson, K. Prša,D. Andreica, A. Amato, M. Isobe and Y. Ueda, Phys. Rev. B 85 (2012) 214407(1-8).
8. Infrared phonons and specific heat in the gapped quantum magnet Ba3 Cr2 O8 : Z. Wang, M. Schmidt, A. Günther, F.
Mayr, Y. Wan, S. -H. Lee, H. Ueda, Y. Ueda, A. Loidl and J. Deisenhofer, Phys. Rev. B 85 (2012) 224304(1-5).
9. Korringa-like relaxation in the high-temperature phase of A-site ordered YBaMn2 O6 : S. Schaile, H. -A. Krug vonNidda, J. Deisenhofer, A. Loidl, T. Nakajima and Y. Ueda, Phys. Rev. B 85 (2012) 205121(1-5).
10. ∗ Stripelike magnetism in a mixed-valence insulating state of the Fe-based ladder compound CsFe2 Se3 : F. Du, K.
Ohgushi, Y. Nambu, T. Kawakami, M. Avdeev, Y. Hirata, Y. Watanabe, T.-J. Sato and Y. Ueda, Phys. Rev. B 85 (2012)
214436(1-5).
11. 51 V-NMR study of antiferromagnetic state and spin dynamics in quasi-one-dimensional BaCo2 V2 O8 : Y. Ideta, Y.
Kawasaki, Y. Kishimoto, T. Ohno, Y. Michihiro, Z. He, Y. Ueda and M. Itoh, Phys. Rev. B 86 (2012) 094433(1-5).
12. Two-dimensional charge fluctuation in β -Na0.33 V2 O5 : K. Ohwada, T. Yamauchi, Y. Fujii and Y. Ueda, Phys. Rev. B
85 (2012) 134102(1-4).
13. †∗ Quadruple-layered perovskite (CuCl)Ca2 NaNb4 O13 : A. Kitada, Y. Tsujimoto, T. Yamamoto, Y. Kobayashi, Y.
Narumi, K. Kindo, A. A. Aczel, G. M. Luke, Y. J. Uemura, Y. Kiuchi, Y. Ueda, K. Yoshimura, Y. Ajiro and H.
Kageyama, J. Solid State Chem. 185 (2012) 10-17.
14. Orbital order in layered manganites probed with 57 Fe Mössbauer spectroscopy: Y. Ueda, K. Nomura and A. I. Rykov,
Hyp. Int. 208 (2012) 19-23.
15. Ferromagnetic hollandite K2 Cr8 O16 : J. Sugiyama, H. Nozaki, M. Mansson, K. Prsa, A. Amato, M. Isobe and Y. Ueda,
Physics Procedia 30 (2012) 186-189.
16. µ SR Investigation of the Hollandite Vanadate K2 V8 O16 : K. H. Chow, M. Mansson, Y. Ikedo, J. Sugiyama, O. Ofer, E.
J. Ansaldo, J. H. Brewer, M. Isobe, H. Gotou, T. Yagi, Y. Ueda and C. Baines, Physics Procedia 30 (2012) 117-120.
17. Revisiting the layered LiNi0.4 Mn0.4 Co0.2 O2 : a magnetic approach: X. Bie, L. Liu, H. Ehrenberg, Y. Wei, K.
Nikolowski, C. Wang, Y. Ueda, H. Chen, G. Chen and F. Du, RSC Advances 2 (2012) 9986-9992.
18. ∗ Incomplete Devil’s Staircase in the Magnetization Curve of SrCu2 (BO3 )2 : M. Takigawa, M. Horvatic, T. Waki, S.
Kramer, C. Berthier, F. L. Bertrand, I. Sheikin, H. Kageyama, Y. Ueda and F. Mila, Phys. Rev. Lett. 110 (2013)067210(1-5).

Hiroi group
Various novel compounds are presented, For example, a unique type of frustrated lattice is found in two A-site ordered spineloxides, LiGaCr4 O8 and LiInCr4 O8 . Because of the large size mismatch between Li+ and Ga3+ /In3+ ions at the A site,
the pyrochlore lattice made up of Cr3+ ions carrying spin 3/2 becomes an alternating array of small and large tetrahedra,
i.e., a “breathing” pyrochlore lattice. YCr6 Ge6 , comprising a kagome lattice made up of Cr atoms, is a plausible candidate
compound for a kagome metal that is expected to exhibit anomalous phenomena such as flat-band ferromagnetism. A uniquestructural transition in single crystals of the spin-1/2 quasi-kagomé antiferromagnet volborthite, Cu3 V2 O7 (OH)2 ·2H2 O, isfound, whereby the unpaired electron “switches” from one d orbital to another upon cooling, so that it is called the orbital
switching transition. Tetrahedral magnetic order and the metal-insulator transition in the pyrochlore lattice of Cd2 Os2 O7 arestudied in detail. Rattling and superconducting properties of the cage compound Gax V2 Al20 are reported.
1. The spin dynamics in distorted kagome lattices: a comparative Raman study: D. Wulferding, P. Lemmens, H. Yoshida,
Y. Okamoto and Z. Hiroi, J. Phys.: Condens. Matter 24 (2012) 185602(1-4).
2. Distorted Kagome Lattice Generated by a Unique Orbital Arrangement in the Copper Mineral KCu3 As2 O7 (OH)3 : Y.
Okamoto, H. Ishikawa, J. G. Nilsen and Z. Hiroi, J. Phys. Soc. Jpn. 81 (2012) 033707(1-4).

3. ∗ High-Field Phase Diagram and Spin Structure of Volborthite Cu3 V2 O7 (OH)2 ·2H2 O: M. Yoshida, M. Takigawa, S.
Krämer, S. Mukhopadhyay, M. Horvati’c, C. Berthier, H. Yoshida, Y. Okamoto and Z. Hiroi, J. Phys. Soc. Jpn. 81(2012) 024703 (1-9).
4. Large Diamagnetism of AV2 Al20 (A=Y and La): A. Onosaka, Y. Okamoto, J.-I. Yamaura, T. Hirose and Z. Hiroi, J.
Phys. Soc. Jpn. 81 (2012) 123702(1-4).
5. ∗ Pressure Dependence of Upper Critical Field in β -Pyrochlore Oxides: D. Iguchi, T. Isono, Y. Machida, K. Izawa, B.
Salce, J. Flouquet, H. Ogusu, J. Yamaura and Z. Hiroi, J. Phys. Soc. Jpn. 80 (2012) SA040.
6. Rattling and Superconducting Properties of the Cage Compound Gax V2 Al20 : Z. Hiroi, A. Onosaka, Y. Okamoto, J.-I.
Yamaura and H. Harima, J. Phys. Soc. Jpn. 81 (2012) 124707(1-11).
7. ∗ Rattling Good Superconductor: the β -Pyrochlore Oxide AOs2 O6 : Z. Hiroi, J. Yamaura and K. Hattori, J. Phys. Soc.
Jpn. 81 (2012) 011012 (24 pages).
8. ∗ Superconductivity in the Einstein Solid Ax V2 Al20 (A = Al and Ga): A. Onosaka, Y. Okamoto, J. Yamaura and Z.
Hiroi, J. Phys. Soc. Jpn. 81 (2012) 023703(1-4).
9. ∗ Synthesis, Structure and Electromagnetic Properties of Manganese Hollandite, Kx Mn8 O16 : T. Kuwabara, M. Isobe,
H. Gotou, T. Yagi, D. Nishio-Hamane and Y. Ueda, J. Phys. Soc. Jpn. 81 (2012) 104701(1-5).
10. Large and homogeneous mass enhancement in the rattling-induced superconductor KOs2 O6 : T. Terashima, N. Kurita,
A. Kiswandhi, E.-S. Choi, J. S. Brooks, K. Sato, J.-I. Yamaura, Z. Hiroi, H. Harima and S. Uji, Phys. Rev. B 85 (2012)
180503(1-5).
11. Giant Phonon Softening and Enhancement of Superconductivity by Phosphorus Doping of BaNi2 As2 : K. Kudo, M.
Takasuga, Y. Okamoto, Z. Hiroi and M. Nohara, Phys. Rev. Lett. 109 (2012) 097002(1-5).
12. ∗ Tetrahedral Magnetic Order and the Metal-Insulator Transition in the Pyrochlore Lattice of Cd2 Os2 O7 : J. Yamaura,
K. Ohgushi, H. Ohsumi, T. Hasegawa, I. Yamauchi, K. Sugimoto, S. Takeshita, A. Tokuda, M. Takata, M. Udagawa,M. Takigawa, H. Harima, T. Arima and Z. Hiroi, Phys. Rev. Lett. 108 (2012) 247205(1-5).
13. Crystal chemistry and magnetic properties of manganese zinc alloy “YMn2 Zn20 ” comprising a Mn pyrochlore lattice:Y. Okamoto, T. Shimizu, J.-I. Yamaura and Z. Hiroi, J. Solid State Chem. 191 (2012) 246-256.
14. Spin Reorientation in the Square-Lattice Antiferromagnets RMnAsO (R = Ce, Nd): Density Functional Analysis of
the Spin-Exchange Interactions between the Rare-Earth and Transition-Metal Ions: C. Lee, E. Kan, H. Xiang, R. K.
Kremer, S.-H. Lee, Z. Hiroi and M.-H. Whangbo, Inorg. Chem. 51 (2012) 6890-6897.
15. A novel crystal polymorph of volborthite, Cu3 V2 O7 (OH)2 ·2H2 O: H. Ishikawa, J.-I. Yamaura, Y. Okamoto, H. Yoshida,
G. J. Nilsen and Z. Hiroi, Acta Cryst. 68 (2012) i41-i44.
16. †∗ Electrospinning Synthesis of Wire-Structured LiCoO2 for Electrode Materials of High-Power Li-Ion Batteries: Y.
Mizuno, E. Hosono, T. Saito, M. Okubo, D. Nishio-Hamane, K. Oh-ishi, T. Kudo and H. Zhou, J. Phys. Chem. C 116(2012) 10774-10780.
17. †∗ Miyahisaite, (Sr,Ca)2 Ba3 (PO4 )3 F, a new mineral of the hedyphane group in the apatite supergroup from the
Shimoharai mine, Oita Prefecture, Japan: D. Nishio-Hmane, Y. Ogoshi and T. Minakawa, Journal of Mineralogicaland Petrological Sciences 107 (2012) 121-126.
18. †∗ An Energy Storage Principle using Bipolar Porous Polymeric Frameworks: K. Sakaushi, G. Nickerl, F. M. Wisser,
D. Nishio-Hamane, E. Hosono, H. Zhou, S. Kaskel and J. Eckert, Angew. Chem. Int. Ed. 51 (2012) 7850-7854.
19. Orbital switching in a frustrated magnet: H. Yoshida, J.-I. Yamaura, M. Isobe, Y. Okamoto, G. J. Nilsen and Z. Hiroi,
Nature Commun. 3 (2012) 860(1-5).
20. Study on the Microstructures and the Magnetic Properties of Precipitates in a Cu75 -Fe5 -Ni20 Alloy: S. Kang, M.
Takeda, M. Takeguchi, Z. Hiroi, G.-W. Kim, D.-S. Bae, C.-G. Lee and B.-H. Koo, J. Nanosci. Nanotech. 12 (2012)
1337-1340.
21. †∗ Hulsite from Sengendera skarn deposit, Miyazaki, Japan: Y. Ogoshi, T. Minakwa and D. Hamane, Japanese Magazineof Mineralogical and Petrological Sciences 41 (2012) 61-66.
22. †∗ Gold nanoparticles stabilized on nanocrystalline magnesium oxide as an active catalyst for reduction of nitroarenes
in aqueous medium at room temperature: K. Layek, M. Lakshmi Kantam, M. Shirai, D. Nishio-Hamane, T. Sasaki and
H. Maheswaran, Green Chem. 14 (2012) 3164-3174.

23. ∗ Magnetic Order in the Spin-1/2 Kagome Antiferromagnet Vesignieite: M. Yoshida, Y. Okamoto, M. Takigawa and Z.
Hiroi, J. Phys. Soc. Jpn. 82 (2013) 013702(1-5).
24. YCr6 Ge6 as a Candidate Compound for a Kagome Metal: Y. Ishii, H. Harima, Y. Okamoto, J.-I. Yamaura and Z. Hiroi,
J. Phys. Soc. Jpn. 82 (2013) 023705(1-4).
25. Breathing Pyrochlore Lattice Realized in A-Site Ordered Spinel Oxides LiGaCr4 O8 and LiInCr4 O8 : Y. Okamoto, G. J.
Nilsen, J. Paul Attfield and Z. Hiroi, Phys. Rev. Lett. 110 (2013) 097203(1-5).
26. †∗ Iseite, Mn2 Mo3 O8 , a new mineral from Ise, Mie Prefecture, Japan: D. Nishio-Hamane, N. Tomita, T. Minakawa and
S. Inaba, Journal of Mineralogical and Petrological Sciences 108 (2013) 37-41.
27. †∗ Synthesis of LiNi0.5 Mn1.5 O4 and 0.5Li2 MnO3 –0.5LiNi1/3 Co1/3 Mn1/3 O2 hollow nanowires by electrospinning: E.
Hosono, T. Saito, J. Hoshino, Y. Mizuno, M. Okubo, D. Asakura, K. Kagesawa, D. Nishio-Hamane, T. Kudo and H.
Zhou, CrystEngComm 15 (2013) 2592-2597.

Kawashima group
We investigated quantum spin/boson systems and frustrated systems by means of large-scale numerical simulation. We also
developed several new numerical techniques. This year we discovered the following facts in particular: (1) super-solid state
exists at the commensurate filling in the soft-core Bose-Hubbard model in two and three dimensions, (2) the phase diagram
was obtained for hard-core Bose-Hubbard model with dipolar interaction, and (3) the solution of the finite-temperature
Gross-Pitaevski equation agree with the Quantum Monte Carlo results even quantitatively.
1. Ground-state phase diagram of the two-dimensional extended Bose-Hubbard model: T. Ohgoe, T. Suzuki and N.
Kawashima, Phys. Rev. B 86 (2012) 054520(1-9).
2. Quantum phases of hardcore bosons with long-range interactions on a square lattice: D. Yamamoto, A. Masaki and I.
Danshita, Phys. Rev. B 86 (2012) 054516(1-17).
3. Commensurate supersolid of three-dimensional lattice bosons: T. Ohgoe, T. Suzuki and N. Kawashima, Phys. Rev.
Lett. 108 (2012) 185302 (4 pages).
4. Finite-Temperature Transition of the Antiferromagnetic Heisenberg Model on a Distorted kagome Lattice: H. Masuda,
T. Okubo and H. Kawamura, Phys. Rev. Lett. 109 (2012) 057201(1-5).
5. Bimodal Momentum Distribution of the High-Density Supersolid State: T. Ohgoe, T. Suzuki and N. Kawashima, J.
Low Temp. Phys. 171 (2012) 309.
6. Phase diagram and universality of the Lennard-Jones gas-liquid system: H. Watanabe, N. Ito and C.-K. Hu, J. Chem.
Phys. 136 (2012) 204102 (7 pages).
7. Quantum phases of hard-core bosons on two-dimensional lattices with anisotropic dipole-dipole interaction: T. Ohgoe,
T. Suzuki and N. Kawashima, Phys. Rev. A 86 (2012) 063635(1-6).
8. Usefulness of an equal-probability assumption for out-of-equilibrium states: a master equation approach: T. Nogawa,
N. Ito and H. Watanabe, Phys. Rev. E 86 (2012) 41133(1-8).
9. Validity of projected Gross-Pitaevskii simulation: Comparison with quantum Monte Carlo: T. Sato, Y. Kato, T. Suzuki
and N. Kawashima, Phys. Rev. E 85 (2012) 050105 (1-4).
10. Localization of Bose-Fermi Mixtures in One-Dimensional Incommensurate Lattices: A. Masaki and H. Mori, J. Phys.:Conf. Series 400 (2012) 012043.
11. Double peaks in the momentum distribution of cold polar molecules in the supersolid state: T. Ohgoe, T. Suzuki and
N. Kawashima, J. Phys.: Conf. Ser. 400 (2012) 012058.
12. Second-Order Phase Transition in Heisenberg Model on Triangular Lattice with Competing Interactions: R. Tamura,
S. Tanaka and N. Kawashima, Phys. Rev. B (2013), accepted for publication.
13. Visibility Pattern of Bose-Fermi Mixtures in One-Dimensional Incommensurate Lattices: A. Masaki and H. Mori,
Philosophical Magazine (2013), accepted for publication.

Noguchi group
We have studied the structure formation of binary mixtures of two surfactants. We found that various micelles such as
bicelles and octopus-like shapes are formed depending on the critical micelle concentration and the ratio of hydrophobic andhydrophilic segments of the molecules. We also studied the dynamics of red blood cells in capillary flow and dynamic-mode
correlation in a glass system.
1. Relationship between bond-breakage correlations and four-point correlations in heterogeneous glassy dynamics:
Configuration changes and vibration modes: H. Shiba, T. Kawasaki and A. Onuki, Phys. Rev. E 86 (2012)
041504(1-14).
2. Ordering and arrangement of deformed red blood cells in flow through microcapillaries: J. L. McWhirter, H. Noguchi
and G. Gompper, New J. Phys. 14 (2012) 085026(1-23).
3. Line tension of branching junctions of bilayer membranes: H. Noguchi, Soft Matter 8 (2012) 3146-3153.
4. Structure formation in binary mixtures of surfactants: vesicle opening-up to bicelles and octopus-like micelles: H.
Noguchi, Soft Matter 8 (2012) 8926-8935.
5. 生体膜の粗視化シミュレーション: 野口 博司, アンサンブル 57 (2012) 1-4.
6. Structure formation in binary mixtures of lipids and detergents: Self-assembly and vesicle division: H. Noguchi, J.
Chem. Phys. 138 (2013) 024907(1-9).
7. Effects of anchored flexible polymers on mechanical properties of model biomembranes: H. Wu and H. Noguchi, AIP
Conf. Proc. 1518 (2013) 649-653.
8. Hierarchical heterogeneous glassy dynamics of configuration changes and vibration modes: T. Kawasaki, H. Shiba and
A. Onuk, AIP Conf. Proc. 1518 (2013) 784-791.
9. Structure formation of lipid membranes: Membrane self-assembly and vesicle opening-up to octopus-like micelles: H.
Noguchi, AIP Conf. Proc. 1518 (2013) 566-570.
10. 脂質膜の構造形成の粗視化シミュレーション: 野口 博司, 生物物理 53 (2013) 11-14.
11. Multiscale modeling of blood flow: from single cells to blood rheology: D. A. Fedosov, H. Noguchi and G. Gompper,
Biomech. Model. Mechanobiol. (2013), in print.
12. Structure formation of surfactant membranes under shear flow: H. Shiba, H. Noguchi and G. Gompper, J. Chem. Phys.
(2013), accepted for publication.
13. Entropy-driven aggregation in multilamellar membranes: H. Noguchi, EPL (2013), accepted for publication.

Materials Synthesis and Characterization group
1. ∗ Pressure Dependence of Upper Critical Field in β -Pyrochlore Oxides: D. Iguchi, T. Isono, Y. Machida, K. Izawa, B.
Salce, J. Flouquet, H. Ogusu, J. Yamaura and Z. Hiroi, J. Phys. Soc. Jpn. 80 (2012) SA040.
2. ∗ Superconductivity in the Einstein Solid Ax V2 Al20 (A = Al and Ga): A. Onosaka, Y. Okamoto, J. Yamaura and Z.
Hiroi, J. Phys. Soc. Jpn. 81 (2012) 023703(1-4).
3. ∗ Synthesis, Structure and Electromagnetic Properties of Manganese Hollandite, Kx Mn8 O16 : T. Kuwabara, M. Isobe,
H. Gotou, T. Yagi, D. Nishio-Hamane and Y. Ueda, J. Phys. Soc. Jpn. 81 (2012) 104701(1-5).
4. †∗ Electrospinning Synthesis of Wire-Structured LiCoO2 for Electrode Materials of High-Power Li-Ion Batteries: Y.
Mizuno, E. Hosono, T. Saito, M. Okubo, D. Nishio-Hamane, K. Oh-ishi, T. Kudo and H. Zhou, J. Phys. Chem. C 116(2012) 10774-10780.
5. †∗ Miyahisaite, (Sr,Ca)2 Ba3 (PO4 )3 F, a new mineral of the hedyphane group in the apatite supergroup from the
Shimoharai mine, Oita Prefecture, Japan: D. Nishio-Hmane, Y. Ogoshi and T. Minakawa, Journal of Mineralogicaland Petrological Sciences 107 (2012) 121-126.
6. †∗ An Energy Storage Principle using Bipolar Porous Polymeric Frameworks: K. Sakaushi, G. Nickerl, F. M. Wisser,
D. Nishio-Hamane, E. Hosono, H. Zhou, S. Kaskel and J. Eckert, Angew. Chem. Int. Ed. 51 (2012) 7850-7854.

7. †∗ Gold nanoparticles stabilized on nanocrystalline magnesium oxide as an active catalyst for reduction of nitroarenes
in aqueous medium at room temperature: K. Layek, M. Lakshmi Kantam, M. Shirai, D. Nishio-Hamane, T. Sasaki and
H. Maheswaran, Green Chem. 14 (2012) 3164-3174.
8. †∗ Iseite, Mn2 Mo3 O8 , a new mineral from Ise, Mie Prefecture, Japan: D. Nishio-Hamane, N. Tomita, T. Minakawa and
S. Inaba, Journal of Mineralogical and Petrological Sciences 108 (2013) 37-41.
9. †∗ Synthesis of LiNi0.5 Mn1.5 O4 and 0.5Li2 MnO3 –0.5LiNi1/3 Co1/3 Mn1/3 O2 hollow nanowires by electrospinning: E.
Hosono, T. Saito, J. Hoshino, Y. Mizuno, M. Okubo, D. Asakura, K. Kagesawa, D. Nishio-Hamane, T. Kudo and H.
Zhou, CrystEngComm 15 (2013) 2592-2597.

Neutron Science Laboratory
Shibayama group
Shibayama group has been exploring the structure and dynamics of soft matter, especially polymer gels, micelles, andphenolic 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 2012 include that (1) upgrade of the small-angle neutron
scattering instrument, SANS-U by introducing a focusing collimation and high-resolution area detector, (2) examination of
the theories of rubber elasticity using an ideal polymer network, i.e., Tetra-PEG gels, (3) Rheo-SANS of threadlike micelles,(4) structural characterization of phenolic resin, and so on.
1. Stress relaxation and hysteresis of nanocomposite gel investigated by SAXS and SANS measurement: T. Nishida, A.
Obayashi, K. Haraguchi and M. Shibayama, Polymer 53 (2012) 4533-4538.
2. Experimental evidences for molecular origin of low-Q peak in neutron/x-ray scattering of 1-alkyl-3-methylimidazolium
bis: K. Fujii, R. Takamuku and T. Kameda, J. Chem. Phys. 135 (2012) 244502(1-11).
3. Relationship between mesoscale dynamics and shear relaxation of ionic liquids with long alkyl chain: T. Yamaguchi,
K.-I. Mikawa, S. Koda, K. Fujii, H. Endo, M. Shibayama, H. Hamano and Y. Umebayashi, J. Chem. Phys. 137 (2012)
104511(1-7).
4. Rubber elasticity for incomplete polymer networks: K. Nishi, M. Chijiishi, Y. Katsumoto, T. Nakao, K. Fujii, U.-I.
Chung, H. Noguchi, T. Sakai and M. Shibayama, J. Chem. Phys. 137 (2012) 224903(1-7).
5. Star-Shaped Trimeric Quaternary Ammonium Bromide Surfactants: Adsorption and Aggregation Properties: T.
Yoshimura, T. Kusano, H. Iwase, M. Shibayama, T. Ogawa and H. Kurata, Langmuir 28 (2012) 9322-9331.
6. Structural and Rheological Studies on Growth of Salt-Free Wormlike Micelles Formed by Star-Type TrimericSurfactants: T. Kusano, H. Iwase, T. Yoshimura and M. Shibayama, Langmuir 28 (2012) 16798-16806.
7. Kinetic Study for AB-Type Coupling Reaction of Tetra-Arm Polymers: K. Nishi, K. Fujii, M. Chijiishi, Y. Katsumoto,U.-I. Chung, T. Sakai and M. Shibayama, Macromolecules 45 (2012) 1031-1036.
8. Pressure Effects on Cononsolvency Behavior of Poly(N-isopropylacrylamide) in Water/DMSO Mixed Solvents: N.
Osaka and M. Shibayama, Macromolecules 45 (2012) 2171-2174.
9. Structural Analysis of High Performance Ion-Gel Comprising Tetra-PEG Network: H. Asai, K. Fujii, T. Ueki, T. Sakai,
U.-I. Chung, M. Watanabe, Y.-S. Han, T.-H. Kim and M. Shibayama, Macromolecules 45 (2012) 3902-3909.
10. Anomalous volume phase transition in a polymer gel with alternative hydrophilic–amphiphilic sequence: H. Kamata,U. Chung, M. Shibayama and T. Sakai, Soft Matter 8 (2012) 6876-6879.
11. Atomistic molecular dynamics study of cross-linked phenolic resins: A. Izumi, T. Nakao and M. Shibayama, Soft
Matter 8 (2012) 5283-5292.
12. Effect of swelling and deswelling on the elasticity of polymer networks in the dilute to semi-dilute region: T. Sakai, M.
Kurakazu, Y. Akagi, M. Shibayama and U.-I. Chung, Soft Matter 8 (2012) 2730-2736.
13. High-performance ion gel with tetra-PEG network: K. Fujii, H. Asai, T. Ueki, T. Sakai, S. Imaizumi, U.-I. Chung, M.
Watanabe and M. Shibayama, Soft Matter 8 (2012) 1756-1759.

14. ∗ Microscopic insights into Ion Gel dynamics using neutron spectroscopy: M. Kofu, T. Someya, S. Tatsumi, K. Ueno,
T. Ueki, M. Watanabe, T. Matsunaga, M. Shibayama, V. G. Sakai, M. Tyagi and O. Yamamuro, Soft Matter 8 (2012)7888-7897.
15. Structural analysis of cured phenolic resins using complementary small-angle neutron and X-ray scattering andscanning electron microscopy: A. Izumi, T. Nakao, H. Iwase and M. Shibayama, Soft Matter 8 (2012) 8438-8445.
16. Structure-mechanical property relationship of tough hydrogels: M. Shibayama, Soft Matter 8 (2012) 8030-8038.
17. Optimization of the thickness of a ZnS/(LiF)-Li-6 scintillator for a high-resolution detector installed on a focusing
small-angle neutron scattering spectrometer (SANS-U): H. Iwase, M. Katagiri and M. Shibayama, J Appl Crystallogr
45 (2012) 507-512.
18. Mechanical properties of a polymer network of Tetra-PEG gel: A. Sugimura, M. Asai, T. Matsunaga, Y. Akagi, T.
Sakai, H. Noguchi and M. Shibayama, Polym J 45 (2012) 300-306.
19. 中性子による材料評価・構造解析: 柴山 充弘, 表面科学 33 (2012) 258-263.
20. 中性子による材料評価・構造解析: 柴山 充弘, 表面科学 33 (2013) 258-263.
21. 溶液中での重水素化ノボラックのコンフォメーション: 和泉 篤士, 中尾 俊夫, 柴山 充弘, ネットワークポリマー
33 (2013) 204-208.
22. Fabrication, Structure, Mechanical Properties, and Application of Tetra-PEG Hydrogels Oren Scherman and Xian Jun
Loh, Eds.: M. Shibayama and T. Sakai, in: Polymeric and Self Assembled Hydrogels: Fundamentals to Applications,
Chapt. 2, edited by RSC Publishing, (RSC Publishing, 2013), 2-38.

Yoshizawa groupA systematic study on spin dynamics in two-dimensional transition-metal oxides have been carried out with use of the highresolution chopper spectrometer installed at BL12 in the Material and Life Science Facility, J-PARC. In the highly hole-doped
region in the layered nickelate, conventional spin wave excitations change its character to metal-like behavior. Spin dynamics
in non-centrosymmetric superconductors CeRhSi3 and CeIrSi3 were also studied.
1. †∗ Long-range order and spin-liquid states of polycrystalline Tb2+x Ti2−x O7+y : T. Taniguchi, H. Kadowaki, H. Takatsu,
B. Fåk, J. Ollivier, T. Yamazaki, T. J. Sato, H. Yoshizawa, Y. Shimura, T. Sakakibara, T. Hong, K. Goto, L. R.
Yaraskavitch and J. B. Kycia, Phys. Rev. B 87 (2013) 060408R(1-5).
2. Structural and magnetic properties in the quantum S=1/2 dimer system Ba3 (Cr1−x Vx )2 O8 with site disorder: T. Hong,
L. Y. Zhu, X. Ke, V. O. Garlea, Y. Qiu, Y. Nambu, H. Yoshizawa, M. Zhu, G. E. Granroth, A. T. Savici, Z. Gai and H.
D. Zhou, Phys. Rev. B 87 (2013) 144427(1-9).

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.
The first topic of this year is that we developed a calorimetric system for metal hydrides and measured the heat of hydrogen
adsorption to palladium and the heat capacities of palladium hydrides. We have clarified that “50 K anomaly”, which has
been a long mystery in this material, is due to a glass transition, i.e., freezing of the motion of the hydrogen atoms disorderedamong the octahedral sites of the palladium fcc lattice. The second topic is that we succeeded to observe magnetic relaxations
in a single molecule magnet (SMM) as a clear quasielastic neutron scattering (QENS) for the first time. The third topic isthat we found the diffusion of hydrogen molecules in clathrate hydrates stabilized by tetrahydrofuran by means of a QENS
technique. Other than these three, we have made some progresses in the studies on porous coordination polymers and ionicliquids.
1. Structures and Low-energy Excitations of Amorphous Gas Hydrates: T. Kikuchi, Y. Inamura, N. Onoda-Yamamuroand O. Yamamuro, J. Phys. Soc. Jpn. 81 (2012) 094604 (5 pages).
2. Hydration properties and compressive strength development of Low Heat Cement: K. Mori, T. Fukunaga, M. Sugiyama,
K. Iwase, K. Oishi and O. Yamamuro, J. Phys. Chem. Solids 73 (2012) 1274-1277.
3. Thermodynamic Study of Simple Molecular Glasses: Universal Features in Their Heat Capacity and the Size of the
Cooperatively Rearranging Regions: S. Tatsumi, S. Aso and O. Yamamuro, Phys. Rev. Lett. 109 (2012) 045701 (5pages).

4. Heat Capacities and Glass Transitions of Ion Gels: O. Yamamuro, T. Someya, M. Kofu, T. Ueki, K. Ueno and M.
Watanabe, J. Phys. Chem. B 116 (2012) 10935-10940.
5. Relationshipbetweenthe
Local
Dynamics
andGas
PermeabilityofPara-SubstitutedPoly(1-chloro-2-phenylacetylenes): R. Inoue, T. Kanaya, T. Masuda, K. Nishida and O. Yamamuro, Macromolecules
45 (2012) 6008-6014.
6. Direct Observation of Supercooled Water in Mortar Materials by Quasi-elastic Neutron Scattering: K. Mori, K. Iwase,
M. Sugiyama, T. Fukunaga and O. Yamamuro, Trans. Mater. Res. Soc. Jpn. 37 (2012) 139-142.
7. Neutron scattering studies of Ti-Cr-V bcc alloy with the residual hydrogen and deuterium: K. Mori, K. Iwase, M.
Sugiyama, M. Kofu, O. Yamamuro, Y. Onodera, T. Otomo and T. Fukunaga, J. Phys.: Conf. Series 340 (2012) 012103(5 pages).
8. ∗ Microscopic insights into Ion Gel dynamics using neutron spectroscopy: M. Kofu, T. Someya, S. Tatsumi, K. Ueno,
T. Ueki, M. Watanabe, T. Matsunaga, M. Shibayama, V. G. Sakai, M. Tyagi and O. Yamamuro, Soft Matter 8 (2012)7888-7897.
9. 単純分子ガラスの熱力学的研究: 山室 修, 辰巳 創一, レオロジー学会誌 40 (2012) 137-142.
10. Heterogeneous Slow Dynamics of Imidazolium Based Ionic Liquids Studied by Neutron Spin Echo: M. Kofu, M.
Nagao, T. Ueki, Y. Kitazawa, Y. Nakamura, S. Sawamura, M. Watanabe and O. Yamamuro, J. Phys. Chem. B 117(2013) 2773-2781.
11. Linear trinuclear Zn(II)–Ce(III)–Zn(II) complex which behaves as a single-molecule magnet: S. Hino, M. Maeda, K.
Yamashita, Y. Kataoka, M. Nakano, T. Yamamura, H. Nojiri, M. Kofu, O. Yamamuro and T. Kajiwara, Dalton Trans.
42 (2013) 2683-2686.
12. Thermal behaviour, structure and dynamics of low-temperature water confined in mesoporous organosilica bydifferential scanning calorimetry, X-ray diffraction and quasi-elastic neutron scattering: M. Aso, K. Ito, H. Sugino,
K. Yoshida, T. Yamada, O. Yamamuro, S. Inagaki and T. Yamaguchi, Pure and Appl. Chem. 85 (2013) 289-305.
13. Phase Transition and Dynamics of Water Confined in Hydroxyethyl Copper Rubeanate Hydrate: T. Yamada, T. Yamada,
M. Tyagi, M. Nagao, H. Kitagawa and O. Yamamuro, J. Phys. Soc. Jpn. (2013), accepted for publication.
14. Mode distribution analysis of quasi-elastic neutron scattering and application to liquid water: T. Kikuchi, K. Nakajima,
S. Ohira-Kawamura, Y. Inamura, O. Yamamuro, M. Kofu, Y. Kawakita, K. Suzuya, M. Nakamura and M. Arai, Phys.
Rev. E (2013), accepted for publication.
15. 中性子散乱と回折: 山室 修, 「大学院講義物理化学 (第 2 版) III. 固体の化学と物性」, 7.3, 小谷正博，幸田清一郎，
染田清彦，阿波賀邦夫, (東京化学同人, 2012), 181-190.
16. ガラス状態: 山室 修, 「イオン液体の科学―新世代液体への挑戦―」, 1.4.3, 西川恵子, 大内幸雄, 伊藤俊幸, 大野
弘幸, 渡邉正義, (丸善, 2012), 82-89.

Masuda group
The correlation of the higher order of the spin operator has attracted theoretical interest in terms of hidden order in spin
disordered state. The challenge is that the experimental probe to identify the correlation is absent. Meanwhile in multiferroic
compound that exhibits spontaneous order both in magnetism and dielectricity, the electric polarization is expressed by second
order tenors of the spin operators, and the spin nematic operator comes to visible. In this fiscal year our group demonstrated
the existence of the spin nematic interaction in an easy-plane type antiferromagnet Ba2 CoGe2 O7 by exploring the magnetic
anisotropy and spin dynamics. Combination of neutron scattering and magnetization measurements reveals that the dominantorigin of the observed in-plane anisotropy is the antiferro-type interaction of spin nematic operator instead of conventional
single-ion anisotropy. The structure of the spontaneous polarization is consistent with the antiferro-nematic order. The
introduction of the spin nematic interaction is useful to understand the physics of spin and electric dipole in multiferroic
compounds.
1. 63,65 Cu Nuclear Resonance Study of the Coupled Spin Dimers and Chains Compound Cu2 Fe2 Ge4 O13 : J. Kikuchi, S.
Nagura, K. Murakami, T. Masuda and G. J. Redhammer, J. Phys. Soc. Jpn. 82 (2013) 034710(1-10).
2. 1 次元フラストレート強磁性鎖のスピン密度波と Bond Nematic 相関: 萩原 雅人, 益田 隆嗣, 波紋 23 (2013) 14-18.

International MegaGauss Science Laboratory
Takeyama group
We have developed a magnetization measurement technique for special use in a vertically aligned single-turn coil, capableof generating ultra-high magnetic fields over 100 T. Compensation ratios of an order as high as 10−4 were achieved by
self-compensation in parallel twin-pickup coils without using compensation circuit mixing of the signal from an auxiliary
coil. High performance cryogenics was employed with a liquid Helium container that was also manufactured to fit the system.
The high magnetic field magnetization measurements were applied to a manganite Bi0.5 Ca0.5 MnO3 at room temperature, andalso to a geometrically frustrated spinel oxide, CdCr2 O44 at very low temperatures. Not only the transition field, but also theabsolute value of the magnetization was shown to be evaluated within a 3% degree of accuracy in magnetic fields over 100 T
by means of a 14-mm inner-diameter single-turn coil.
1. ∗ Magnetic Phases of ZnCr2 O4 Revealed by Magneto-Optical Studies under Ultra-High Magnetic Fields up to 600 T:
A. Miyata, H. Ueda, Y. Ueda, Y. Motome, N. Shannon, K. Penc and S. Takeyama, J. Phys. Soc. Jpn. 81 (2012)
114701(1-8).
2. ∗ Precise Magnetization Measurements by Parallel Self-Compensated Induction Coils in a Vertical Single-Turn Coilup to 103 T: S. Takeyama, R. Sakakura, Y. H. Matsuda, A. Miyata and M. Tokunaga, J. Phys. Soc. Jpn. 81 (2012)
014702(1-7).
3. クロムスピネル幾何学的フラストレート磁性体の超強磁場磁気相 -600 T までの磁気光学精密測定から-: 宮田 敦
彦, 嶽山 正二郎, 固体物理 47(8) (2012) 17-25.
4. 「電磁濃縮法による室内世界最高磁場発生と物性物理への応用」: 嶽山 正二郎, 日本物理学会誌 67(3) (2012)
170-178.
5. Magneto-photoluminescence of charged excitons from Mgx Zn1−x O/ZnO heterojunctions: T. Makino, Y. Segawa, A.
Tsukazaki, H. Saito, S. Takeyama, S. Akasaka, K. Nakahara and M. Kawasaki, Phys. Rev. B 87 (2013) 085312(1-7).
6. Precise measurement of a magnetic field generated by the electromagnetic flux compression technique: D. Nakamura,
H. Sawabe, Y. H. Matsuda and S. Takeyama, Rev. Sci. Instrum. 84 (2013) 044702(1-10).
7. Magnetization Studies of Field-Induced Transitions by Using a Single-Turn Coil Technique: N. Abe, Y. H. Matsuda,
S. Takeyama, K. Sato, H. Kageyama and Y. Nishiwaki, J. Low Temp. Phys. 170 (2013) 452–456.
8. Precision of an Ultra-high Magnetic Field Generated by the Electro-magnetic Flux Compression: D. Nakamura, Y. H.
Matsuda and S. Takeyama, J. Low Temp. Phys. 170 (2013) 457–462.
9. ∗ Magneto-Absorption in the α Phase of Solid Oxygen at Megagauss Magnetic Fields: T. Nomura, Y. H. Matsuda, J. L.
Her, S. Takeyama, A. Matsuo, K. Kindo and T. C. Kobayashi, J Low Temp Phys 170 (2013) 372-376.

Kindo group
New mono-coil was developed to generate 85.8 T non-destructively. The maximum field beyond 85 T is the world highest
field as generated by a non-destructive mono-coil. The coil has an inner bore of 18 mm and the pulse duration is about 4
msec.
1. †∗ High-Magnetic-Field X-ray Absorption and Magnetic Circular Dichroism Spectroscopy in the Mixed-Valent
Compound YbAgCu4 : T. Nakamura, Y. H. Matsuda, J.-L. Her, K. Kindo, S. Michimura, T. Inami, M. Mizumaki,
N. Kawamura, M. Suzuki, B. Chen, H. Ohta, K. Yoshimura and A. Kotani, J. Phys. Soc. Jpn. 81 (2012) 114702(1-11).
2. ∗ Multiferroicity on the Zigzag-Chain Antiferromagnet MnWO4 in High Magnetic Fields: H. Mitamura, T. Sakakibara,
H. Nakamura, T. Kimura and K. Kindo, J. Phys. Soc. Jpn. 81 (2012) 054705(1-7).
3. † Soft-X-ray Magnetic Circular Dichroism under Pulsed High Magnetic Fields at Eu M4,5 Edges of Mixed Valence
Compound EuNi2 (Si0.18 Ge0.82 )2 : T. Nakamura, T. Hirono, T. Kinoshita, Y. Narumi, M. Hayashi, H. Nojiri, A. Mitsuda,
H. Wada, K. Kodama, K. Kindo and A. Kotani, J. Phys. Soc. Jpn. 81 (2012) 103705(1-4).
4. †∗ Valence Fluctuation in YbAgCu4 at High Magnetic Fields: Y. H. Matsuda, T. Nakamura, J.-L. Her, K. Kindo, S.
Michimura, T. Inami, M. Mizumaki, N. Kawamura, M. Suzuki, B. Chen, H. Ohta and K. Yoshimura, J. Phys. Soc. Jpn.
81 (2012) 015002(1-2).

5. High magnetic field study of the Gd-Co exchange interactions in GdCo12 B6 : O. Isnard, Y. Skourski, L. V. B. Diop,
Z. Arnold, A. V. Andreev, J. Wosnitza, A. Iwasa, A. Kondo, A. Matsuo and K. Kindo, J. Appl. Phys. 111 (2012)
093916(1-5).
6. † Ferromagnetism induced in the anisotropic stacked kagome lattice antiferromagnet Cs2 Cu3 CeF12 : T. Amemiya, I.
Umegaki, H. Tanaka, T. Ono, A. Matsuo and K. Kindo, Phys. Rev. B 85 (2012) 144409(1-9).
7. † Short-range correlations and persistent spin fluctuations in the undistorted kagome lattice Ising antiferromagnet
Co3 Mg(OH)6 Cl2 : M. Fujihala, X. G. Zheng, Y. Oohara, H. Morodomi, T. Kawae, A. Matsuo and K. Kindo, Phys.
Rev. B 85 (2012) 012402(1-5).
8. †∗ Suppression of f-electron itinerancy in CeRu2 Si2 by a strong magnetic field: Y. H. Matsuda, T. Nakamura, J. L. Her,
S. Michimura, T. Inami, K. Kindo and T. Ebihara, Phys. Rev. B 86 (2012) 041109(R)(1-4).
9. † Experimental Realization of a Spin-1/2 Triangular-Lattice Heisenberg Antiferromagnet: Y. Shirata, H. Tanaka, A.
Matsuo and K. Kindo, Phys. Rev. Lett. 108 (2012) 057205(1-5).
10. †∗ Quadruple-layered perovskite (CuCl)Ca2 NaNb4 O13 : A. Kitada, Y. Tsujimoto, T. Yamamoto, Y. Kobayashi, Y.
Narumi, K. Kindo, A. A. Aczel, G. M. Luke, Y. J. Uemura, Y. Kiuchi, Y. Ueda, K. Yoshimura, Y. Ajiro and H.
Kageyama, J. Solid State Chem. 185 (2012) 10-17.
11. † Field-induced valence transition in EuPtP1−x Asx : A. Mitsuda, T. Okuma, M. Sugishima, H. Wada, K. Sato and K.
Kindo, Eur. Phys. J. B 85 (2012) 71-75.
12. Collapse of Magnetic Order of the Quasi One-Dimensional Ising-Like Antiferromagnet BaCo2 V2 O8 in Transverse
Fields: S. Kimura, K. Okunishi, M. Hagiwara, K. Kindo, Z. He, T. Taniyama, M. Itoh, K. Koyama and K. Watanabe, J.
Phys. Soc. Jpn. 82 (2013) 033706(1-4).
13. †∗ High-Field Phase Diagram of SmRu4 P12 Determined by Ultrasonic Measurements in Pulsed Magnetic Field up to 55
T: M. Yoshizawa, H. Mitamura, F. Shichinomiya, S. Fukuda, Y. Nakanishi, H. Sugawara, T. Sakakibara and K. Kindo,
J. Phys. Soc. Jpn. 82 (2013) 033602(1-5).
14. † Marked Change in the Ground State of CeRu2 Al10 Induced by Small Amount of Rh Substitution: A. Kondo, K. Kindo,
K. Kunimori, H. Nohara, H. Tanida, M. Sera, R. Kobayashi, T. Nishioka and M. Matsumura, J. Phys. Soc. Jpn. 82(2013) 054709(1-5).
15. † Crystal structure and magnetic properties of honeycomb-like lattice antiferromagnet p-BIP-V2 : H. Yamaguchi, S.
Nagata, M. Tada, K. Iwase, T. Ono, S. Nishihara, Y. Hosokoshi, T. Shimokawa, H. Nakano, H. Nojiri, A. Matsuo, K.
Kindo and T. Kawakami, Phys. Rev. B 87 (2013) 125120(1-8).
16. ∗ Magneto-Absorption in the α Phase of Solid Oxygen at Megagauss Magnetic Fields: T. Nomura, Y. H. Matsuda, J. L.
Her, S. Takeyama, A. Matsuo, K. Kindo and T. C. Kobayashi, J Low Temp Phys 170 (2013) 372-376.
17. ∗ Observation of Field-induced Anomaly in High-field Magnetization on a Complex Spin-Driven Multiferroic
Compound, LiCu2−z Znz O2 : J. L. Her, H. C. Hsu, Y. H. Matsuda, K. Kindo and F. C. Chou, J Low Temp Phys 170(2013) 285-290.
18. † Present Status and Future Plan at High Magnetic Field Laboratory in Osaka University: M. Hagiwara, T. Kida, K.
Taniguchi and K. Kindo, J Low Temp Phys 170 (2013) 531-540.
19. † Itinerant electron magnetism of η -carbides Co6 M6 C and Ni6 M6 C (M=Mo and W): T. Waki, D. Furusawa, Y. Tabata,C. Michioka, K. Yoshimura, A. Kondo, K. Kindo and H. Nakamura, Journal of Alloys and Compounds 554 (2013)21-24.

Tokunaga group
Through the measurements of magnetoresistance up to 65 T, we found field-induced melting of the antiferromagnetic spinorder in single crystals of Fe1+y Te1−x Sx . Concomitant melting of the orbital order was visually demonstrated through thehigh-speed polarizing microscopy in pulsed fields.
1. Field-Induced Magnetostructural Transitions in Antiferromagnetic Fe1+y Te1−x Sx : M. Tokunaga, T. Kihara, Y.
Mizuguchi and Y. Takano, J. Phys. Soc. Jpn. 81 (2012) 063703(1-4).

2. ∗ Precise Magnetization Measurements by Parallel Self-Compensated Induction Coils in a Vertical Single-Turn Coilup to 103 T: S. Takeyama, R. Sakakura, Y. H. Matsuda, A. Miyata and M. Tokunaga, J. Phys. Soc. Jpn. 81 (2012)
014702(1-7).
3. Multiferroic properties of an åkermanite Sr2 CoSi2 O7 single crystal in high magnetic fields: M. Akaki, H. Iwamoto, T.
Kihara, M. Tokunaga and H. Kuwahara, Phys. Rev. B 86 (2012) 060413(1-4).
4. Giant Magnetoresistance Effect in the Metal–Insulator Transition of Pyrochlore Oxide Nd2 Ir2 O7 : K. Matsuhira, M.
Tokunaga, M. Wakeshima, Y. Hinatsu and S. Takagi, J. Phys. Soc. Jpn. 82 (2013) 023706(1-4).
5. Thermal Transport and Magnetotransport Properties of CuCr1−x Mgx O2 with a Spin-3/2 Antiferromagnetic Triangular
Lattice: T. Okuda, S. Oozono, T. Kihara and M. Tokunaga, J. Phys. Soc. Jpn. 82 (2013) 014706(1-7).
6. Magnetic control of electric polarization in the noncentrosymmetric compound (Cu,Ni)B2 O4 : N. D. Khanh, N. Abe,K. Kubo, M. Akaki, M. Tokunaga, T. Sasaki and T. Arima, Phys. Rev. B 87 (2013) 184416(1-5).
7. Shubnikov–de Haas oscillations in the bulk Rashba semiconductor BiTeI: C. Bell, M. S. Bahramy, H. Murakawa, J. G.
Checkelsky, R. Arita, Y. Kaneko, Y. Onose, M. Tokunaga, Y. Kohama, N. Nagaosa, Y. Tokura and H. Y. Hwang, Phys.
Rev. B 87 (2013) 081109(R)(1-5).
8. Field-Induced Magnetostructural Transitions in Antiferromagnetic Fe1+y Te1−x Sx : M. Tokunaga, T. Kihara, Y.
Mizuguchi and Y. Takano, J. Low Temp. Phys. 170 (2013) 340-345.
9. High Magnetic Field Dependence of Magnetodielectric Properties in Sr2 CoSi2 O7 Crystal: M. Akaki, T. Tadokoro, T.
Kihara, M. Tokunaga and H. Kuwahara, J. Low Temp. Phys. 170 (2013) 291-295.
10. Studies on multiferroic materials in high magnetic fields: M. Tokunaga, Front. Phys. 7 (2012) 386-398.

Y. Matsuda group
Valence states of rare-earth ions in heavy fermion compounds at high magnetic fields have been investigated. A
distinct magnetic field-induced valence transition was observed in YbAgCu4 by the x-ray absorption spectroscopy. The
metamagnetism was also found at the valence transition. This findings support the theoretical proposal that YbAgCu4 islocated at near the quantum critical point of the valence transition. Moreover, a small magnetic field-induced valence change
was detected in a typical Kondo lattice CeRu2 Si2 . The observed valence reduction of Ce ion towards 3+ indicates the reductionof the itinerancy of the f-electrons. Apart from the valence states, the microscopic magnetic field-induced spin-crossoverphenomenon was observed in a complex molecule Mn III(taa) using the high magnetic field x-ray spectroscopy. The
techniques of the x-ray spectroscopy in a pulsed high magnetic field were reported, especially focusing on the portable type
capacitor bank and miniature magnets. We have succeeded in making the ultrahigh magnetic field magnetization measurement
up to 103 T, and demonstrated the magnetization curves in several magnetic materials.
1. †∗ High-Magnetic-Field X-ray Absorption and Magnetic Circular Dichroism Spectroscopy in the Mixed-Valent
Compound YbAgCu4 : T. Nakamura, Y. H. Matsuda, J.-L. Her, K. Kindo, S. Michimura, T. Inami, M. Mizumaki,
N. Kawamura, M. Suzuki, B. Chen, H. Ohta, K. Yoshimura and A. Kotani, J. Phys. Soc. Jpn. 81 (2012) 114702(1-11).
2. ∗ Precise Magnetization Measurements by Parallel Self-Compensated Induction Coils in a Vertical Single-Turn Coilup to 103 T: S. Takeyama, R. Sakakura, Y. H. Matsuda, A. Miyata and M. Tokunaga, J. Phys. Soc. Jpn. 81 (2012)
014702(1-7).
3. †∗ Valence Fluctuation in YbAgCu4 at High Magnetic Fields: Y. H. Matsuda, T. Nakamura, J.-L. Her, K. Kindo, S.
Michimura, T. Inami, M. Mizumaki, N. Kawamura, M. Suzuki, B. Chen, H. Ohta and K. Yoshimura, J. Phys. Soc. Jpn.
81 (2012) 015002(1-2).
4. † Magnetic field-induced spin-crossover transition in [MnIII(taa)] studied by x-ray absorption spectroscopy: J. L. Her,Y. H. Matsuda, M. Nakano, Y. Niwa and Y. Inada, J. Appl. Phys. 111 (2012) 053921(1-4).
5. †∗ Suppression of f-electron itinerancy in CeRu2 Si2 by a strong magnetic field: Y. H. Matsuda, T. Nakamura, J. L. Her,
S. Michimura, T. Inami, K. Kindo and T. Ebihara, Phys. Rev. B 86 (2012) 041109(R)(1-4).
6. X-ray Spectroscopies in Pulsed High Magnetic Fields: New Frontier with Flying Magnets and Rolling Capacitor Banks:
Y. Narumi, T. Nakamura, T. Kinoshita, Y. H. Matsuda and H. Nojiri, Synchrotron Radiation News 25 (2012) 12-17.
7. X-ray Diffraction and Absorption Spectroscopy in Pulsed High Magnetic Fields: Y. H. Matsuda and T. Inami, J. Phys.
Soc. Jpn. 82 (2013) 021009 (17 pages).

8. ∗ Precise measurement of a magnetic field generated by the electromagnetic flux compression technique: D. Nakamura,
H. Sawabe, Y. H. Matsuda and S. Takeyama, Rev. Sci. Instrum. 84 (2013) 044702 (10 pages).
9. Effect of surface roughness on electrical characteristics in amorphous InGaZnO thin-film transistors with high-κ
Sm2O3 dielectrics: F.-H. Chen, M.-N. Hung, J.-F. Yang, S.-Y. Kuo, J.-L. Her, Y. H. Matsuda and T.-M. Pan, Journal of
Physics and Chemistry of Solids 74 (2013) 570-574.
10. ∗ Magnetization Studies of Field-Induced Transitions by Using a Single-Turn Coil Technique: N. Abe, Y. H. Matsuda,
S. Takeyama, K. Sato, H. Kageyama and Y. Nishiwaki, J Low Temp Phys 170 (2013) 452-456.
11. ∗ Magneto-Absorption in the α Phase of Solid Oxygen at Megagauss Magnetic Fields: T. Nomura, Y. H. Matsuda, J. L.
Her, S. Takeyama, A. Matsuo, K. Kindo and T. C. Kobayashi, J Low Temp Phys 170 (2013) 372-376.
12. ∗ Observation of Field-induced Anomaly in High-field Magnetization on a Complex Spin-Driven Multiferroic
Compound, LiCu2−z Znz O2 : J. L. Her, H. C. Hsu, Y. H. Matsuda, K. Kindo and F. C. Chou, J Low Temp Phys 170(2013) 285-290.
13. ∗ Precision of an Ultra-high Magnetic Field Generated by the Electro-magnetic Flux Compression: D. Nakamura, Y. H.
Matsuda and S. Takeyama, J Low Temp Phys 170 (2013) 457-462.

Center of Computational Materials Science
Todo group
The main subject of the research in Todo group in FY2012 is as follows: (1) Optimization of transition kernel of Markov
chain Monte Carlo. (2) Quantum Monte Carlo level spectroscopy and spin liquid phase in two dimensions. (3) Finite-size
scaling with dynamical recovery of isotropy for anisotropic spin systems. (4) Quantum Monte Carlo method for measuring
the local Z2 Berry phase. (5) Deconfined critical phenomena in SU(N) quantum antiferromagnets. We have also developed
the ALPS framework for large-scale parallel simulations using quantum Monte Carlo, numerical diagonalization, etc, in orderto advance our own research on quantum phase transitions and quantum critical phenomena by eliciting high performance ofthe modern supercomputers, such as the K computer.
1. Ordering and excitation in orbital compass model on a checkerboard lattice: J. Nasu, S. Todo and S. Ishihara, Phys.
Rev. B 85 (2012) 205141(1-12).
2. Path-integral Monte Carlo method for the local Z2 Berry phase: Y. Motoyama and S. Todo, Phys. Rev. E 87 (2013)
021301(1-5).
3. Loop Algorithm: S. Todo, in: Strongly Correlated Systems: Numerical Methods (Springer Series in Solid-State
Sciences), Ch 6, edited by A. Avella and F. Mancini, (Springer-Verlag, Berlin, 2013), 153-184.

Laser and Synchrotron Research Center
Suemoto group
The spin reorientation transition in a weak ferromagnet ErFeO3 has been detected by observing the free induction decay
signal due to the spin precession motion of the aligned spins, using the terahertz time domain spectroscopy. This demonstrates
ultrafast detection of spin orientation with femtojoule pulses which gives practically no thermal disturbance on the sample.
The ultrafast hole dynamics, which was hard to access, has been deduced from a comparison of time-resolved luminescenceand photoemission data. We propose this type of combined measurements as a new methodology for investigating the holedynamics in luminescent materials.
1. † Anomalous behavior of high-frequency zero-field ferromagnetic resonance in aluminum-substituted ε -Fe2 O3 : M.
Yoshikiyo, A. Namai, M. Nakajima, T. Suemoto and S. Ohkoshi, J. Appl. Phys. 111 (2012) 07A726(1-3).
2. † Ultrafast dynamics of reversible photoinduced phase transitions in rubidium manganese hexacyanoferrate investigatedby CN vibration spectroscopy: A. Asahara, M. Nakajima, R. Fukaya, H. Tokoro, S. Ohkoshi and T. Suemoto, Phys.
Rev. B 86 (2012) 195138(1-9).
3. † Picosecond Soft-X-ray Laser Interferometer for Probing Nanometer Surface Structure: Y. Ochi, K. Terakawa, N.
Hasegawa, M. Yamamoto, T. Tomita, T. Kawachi, Y. Minami, M. Nishikino, T. Imazono, M. Ishino and T. Suemoto,Jpn. J. Appl. Phys. 51 (2012) 016601(1-3).

4. † Experimental verification of femtosecond laser ablation schemes by time-resolved soft x-ray reflective imaging: T.
Tomita, M. Yamamoto, N. Hasegawa, K. Terakawa, Y. Minami, M. Nishikino, M. Ishino, T. Kaihori, Y. Ochi, T.
Kawachi, M. Yamagiwa and T. Suemoto, Optics Express 20 (2012) 29329-29337.
5. † Dependence of the cutoff in lithium plasma harmonics on the delay betweenthe prepulse and the main pulse: M.
Suzuki, M. Baba, R. A. Ganeev, L. E. Bom, H. Kuroda and T. Ozaki, J. Phys. B: At. Mol. Opt. Phys. 45 (2012)065601(5 pages).
6. † Growth Dynamics of Photoinduced Phase Domainin Cyano-Complex Studied by Boundary Sensitive Raman
Spectroscopy: A. Asahara, M. Nakajima, R. Fukaya, H. Tokoro, S. Ohkoshi and T. Suemoto, Acta Physica Polonica A
121 (2012) 375-378.
7. Ultrafast Coherent Control of Spin Precession Motion by Terahertz Magnetic Pulses: M. Nakajima, K. Yamaguchi and
T. Suemoto, Acta Physica Polonica A 121 (2012) 343-346.
8. † Hard magnetic ferrite with a gigantic coercivity and high frequency millimetre wave rotation: A. Namai, M. Yoshikiyo,
K. Yamada, S. Sakurai, T. Goto, T. Yoshida, T. Miyazaki M. Nakajima, T. Suemoto, H. Tokoro and S. Ohkoshi, Nature
Commun. 3 (2012) 1035(1-6).
9. ∗ Mechanism of Enhanced Optical Second-Harmonic Generation in the Conducting Pyrochlore-Type Pb2 Ir2 O7−x Oxide
Compound: Y. Hirata, M. Nakajima, Y. Nomura, H. Tajima, Y. Matsushita, K. Asoh, Y. Kiuchi, A. G. Eguiluz, R. Arita,
T. Suemoto and K. Ohgushi, Phys. Rev. Lett. 110 (2013) 187402(1-5).
10. † Terahertz Time-Domain Observation of Spin Reorientation in Orthoferrite ErFeO3 through Magnetic Free Induction
Decay: K. Yamaguchi, T. Kurihara, Y. Minami, M. Nakajima and T. Suemoto, Phys. Rev. Lett. 110 (2013)
137204(1-5).
11. † High-power THz wave generation in plasma induced by polarization adjusted two-color laser pulses: Y. Minami, T.
Kurihara, K. Yamaguchi, M. Nakajima and T. Suemoto, Appl. Phys. Lett. 102 (2013) 041105(1-4).
12. † Longitudinal THz wave generation from an air plasma filament induced by a femtosecond lase: Y. Minami, T.
Kurihara, K. Yamaguchi, M. Nakajima and T. Suemoto, Appl. Phys. Lett. 102 (2013) 151106(1-3).
13. † Pulsed laser ablation plasmas generated in CO2 under high-pressure conditions up to supercritical fluid: T. Kato, S.
Stauss, S. Kato, K. Urabe, M. Baba, T. Suemoto and K. Terashima, Appl. Phys. Lett. 101 (2013) 224013(1-4).
14. テラヘルツパルス磁場によるインパルシブなスピン励起とコヒーレント制御: 中嶋 誠, 山口 啓太, 末元 徹, 応用
物理 81-4 (2012) 317-320.

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 importantin addition to the spin fluctuation mechanism.
1. Corrigendum: Determination of the absolute chirality of tellurium using resonant diffraction with circularly polarized
x-rays: Y. Tanaka, S. P. Collins, S. W. Lovesey, M. Matsunami, T. Moriwaki and S. Shin, J. Phys.: Condens. Matter 24(2012) 159501(1 page).
2. Photoemission Evidence for Valence Fluctuations and Kondo Resonance in YbAl2: M. Matsunami, A. Chainani, M.
Taguchi, R. Eguchi, Y. Takata, M. Oura, M. Yabashi, K. Tamasaku, Y. Nishino, T. Ishikawa, M. Kosaka and S. Shin, J.
Phys. Soc. Jpn. 81 (2012) 073702(1-4).
3. †∗ Abrupt change in the energy gap of superconducting Ba1−x Kx Fe2 As2 single crystals with hole doping: W. Malaeb,
T. Shimojima, Y. Ishida, K. Okazaki, Y. Ota, K. Ohgushi, K. Kihou, T. Saito, C. H. Lee, S. Ishida, M. Nakajima, S.
Uchida, H. Fukazawa, Y. Kohori, A. Iyo, H. Eisaki, C. -T. Chen, S. Watanabe, H. Ikeda and S. Shin, Phys. Rev. B 86
(2012) 165117 (1-7).
4. Correlation effects, circular dichroism, and Fermi surfaces of bulk nickel from soft x-ray angle-resolved photoemission:
J. Braun, J. Minar, H. Ebert, A. Chainani, J. Miyawaki, Y. Takata, M. Taguchi, M. Oura and S. Shin, Phys. Rev. B 85
(2012) 165105(1-5).
5. Evolution of magnetic phases in single crystals of SrFe1−x Cox O3 solid solution: Y. W. Long, Y. Kaneko, S. Ishiwata, Y.
Tokunaga, T. Matsuda, H. Wadati, Y. Tanaka, S. Shin, Y. Tokura and Y. Taguchi, Phys. Rev. B 86 (2012) 064436(1-8).

6. Observation of two fine structures related to the hidden order in the spectral functions of URu2Si2: R. Yoshida, M.
Fukui, Y. Haga, E. Yamamoto, Y. Onuki, M. Okawa, W. Malaeb, S. Shin, Y. Muraoka and T. Yokoya, Phys. Rev. B 85
(2012) 241102(1-4).
7. †∗ Ultrahigh resolution soft x-ray emission spectrometer at BL07LSU in SPring-8: Y. Harada, M. Kobayashi, H. Niwa,
Y. Senba, H. Ohashi, T. Tokushima, Y. Horikawa and S. Shin, Rev. Sci. Instrum. 83 (2012) 013116(1-6).
8. Incommensurate Orbital Modulation behind Ferroelectricity in CuFeO2 .: Y. Tanaka, N. Terada, T. Nakajima, M.
Taguchi, T. Kojima, Y. Takata, S. Mitsuda, M. Oura, Y. Senba, H. Ohashi and S. Shin, Phys. Rev. Lett. 109 (2012)
127205(1-5).
9. Octet-line node structure of superconducting order parameter in KFe2 As2 : K. Okazaki, Y. Ota, Y. Kotani, W. Malaeb,
Y. Ishida, T. Shimojima, T. Kiss, S. Watanabe, C. -T. Chen, K. Kihou, C. H. Lee, A. Iyo, H. Eisaki, T. Saito, H.
Fukazawa, Y. Kohori, K. Hashimoto, T. Shibauchi, Y. Matsuda, H. Ikeda, H. Miyahara, R. Arita, A. Chainani and S.
Shin, Science 337 (2012) 1314-1317.
10. Special fingerprint in x-ray absorption for hydrogen-bonded dimer formation of acentic acids in solution: Y. Horikawa,
H. Arai, T. Tokushima and S. Shin, Chem. Phys. Lett. 522 (2012) 33-37.
11. The Effect of Tetraphenylphosphonium Chloride on Phase Behavior and Nanoscale Structures in a Mixture of D2 O and3-Methylpyridine: K. Sadakane, Y. Horikawa, M. Nagao and H. Seto, Chem. Lett. 41 (2012) 1075-1077.
12. Quasiparticles and Fermi liquid behavior in an organic metal: T. Kiss, A. Chainai, H. M. Yamamoto, T. Miyazaki, T.
Akimoto, T. Shimojima, K. Ishizaka, S. Watanabe, C. T. Chen, A. Fukaya, R. Kato and S. Shin, Nature Commun. 3(2012) 1089(1-6).
13. ∗ 液体水分子の内殻電子励起ダイナミクスと局所構造: 原田 慈久, 徳島 高, 堀川 裕加, 丹羽 秀治, 木内 久雄, 小林
正起, 尾嶋 正治, 辛 埴, しょうとつ 10 (2013) 14-20.

Takahashi group
We have been studying the structure and phase transition of surfaces and interfaces with diffraction techniques. Bismuth
attracts much attention from a viewpoint of topological insulators. It was shown that a single bilayer of Bi(001) on
Bi2 Te3 (111) is strongly distorted compared to the bulk Bi, resulting in a large change in the band structure. We have also
successfully applied a novel method, analyzing the surface structure as an electron density distribution model-independently,
to the structure of a few layers of pentacene on Bi(001).
1. Surface relaxation of topological insulators: Influence on the electronic structure: N. Fukui, T. Hirahara, T. Shirasawa,T. Takahashi, K. Kobayashi and S. Hasegawa, Phys. Rev. B 85 (2012) 115426(1-4).
2. Atomic and Electronic Structure of Ultrathin Bi(111) Films Grown on Bi2 Te3 (111) Substrates: Evidence for a
Strain-Induced Topological Phase Transition: T. Hirahara, N. Fukui, T. Shirasawa, M. Yamada, M. Aitani, H. Miyazaki,
M. Matsunami, S. Kimura, T. Takahashi, S. Hasegawa and K. Kobayashi, Phys. Rev. Lett. 109 (2012) 227401(1-5).
3. 多波長同時分散型光学系を用いた結晶トランケーションロッド散乱プロファイルの迅速測定法の開発: 白澤 徹郎, 荒川 悦雄, W. Voegeli, 高橋 敏男, 松下 正, 放射光 25 No.4 (2012) 229-237.
4. Structure of a Bi/Bi2 Te3 heteroepitaxial film studied by x-ray crystal truncation rod scattering: T. Shirasawa, J.
Tsunoda, T. Hirahara and T. Takahashi, Phys. Rev. B 87 (2013) 075449(1-5).
5. A method for measuring the specular X-ray reflectivity with millisecond time resolution: W. Voegeli, T. Matsushita, E.
Arakawa, T. Shirasawa, T. Takahashi and Y. F. Yano, J. Phys.: Conf. Ser. 425 (2013) 092003(1-4).
6. X-ray intensity and beam trajectory for the Laue-case off-Bragg conditions: T. Takahashi, T. Shirasawa, W. Voegeli,
E. Arakawa and T. Matsushita, in: Silicon Single Crystal:Insatiable Pursuit towards Ideal Quality as Crop in
Semiconductor Industry and X-ray Optical Element in Synchrotron Science (High Energy Accelerator Research
Organization(KEK), 2012), 105-105.
7. X 線 CTR 散乱ホログラフィによる表面・界面原子イメージング: 白澤 徹郎, 高橋 敏男, X 線結像光学ニューズレ
ター No.36 (2012) 5-7.
8. X 線物理学の基礎: 雨宮 慶幸, 高橋 敏男, 百生 敦, 篠原 佑也, 白澤 徹郎, 矢代 航, ((株) 講談社, 東京都文京区音羽2-12-21, 2012).

Akiyama group
In 2012, we intensively studied physics of short-pulse generation via gain switching of various semiconductor lasers, such as
InGaAsP distributed-feedback (DFB) lasers, InGaAs Fabry-Perot (FP) lasers, and InGaN vertical-cavity surface-emitting
lasers (VCSELs). We developed quantitative optical spectroscopy and analysis using detailed-balance relations tostudy non-equilibrium nature of photo-excited carriers in non-doped semiconductor quantum wells, fluorescent radiation
thermometry, quantum-wire lasers, and tandem solar cells. We achieved quantitative measurements of color change inspectra of firefly bioluminescence due to modification of enzyme protein structures in site-directed-mutant luciferase andto temperature change. We also accomplished in-situ absorption and fluorescence spectroscopy of firefly oxyluciferin in thewild-type and red-mutant luciferase. Collaborations of theoretical calculations with TD-DFT of electronic states for luciferin
and oxyluciferin in water were made to interpret these experiments.
1. Fano-Resonance Gain by Dephasing Electron–Hole Cooper Pairs in Semiconductors: K. Kamide, M. Yoshita, H.
Akiyama, M. Yamaguchi and T. Ogawa, J. Phys. Soc. Jpn. 81 (2012) 093706(1-4).
2. Observation of high Rydberg states of one-dimensional excitons in GaAs quantum wires bymagneto-photoluminescence excitation spectroscopy: M. Okano, Y. Kanemitsu, S. Chen, T. Mochizuki, M.
Yoshita, H. Akiyama, L. N. Pfeiffer and K. W. West, Phys. Rev. B 86 (2012) 085312(1-5).
3. Analysis of gain-switching characteristics including strong gain saturation effects in low-dimensional semiconductor
lasers: S. Chen, M. Yoshita, T. Ito, T. Mochizuki, H. Akiyama, H. Yokoyama, K. Kamide and T. Ogawa, Jpn. J. Appl.
Phys. 51 (2012) 098001(1-2).
4. Waveguide-two-points-differential-excitation method for quantitative absorption measurements of nano-structures: T.
Mochizuki, M. Yoshita, S. Maruyama, C. Kim, K. Fukuda, H. Akiyama, L. N. Pfeiffer and K. W. West, Jpn. J. Appl.
Phys. 51 (2012) 106601(1-5).
5. Applicability of continuum absorption in semiconductor quantum wells to absolute absorption-strength standards: M.
Yoshita, K. Kamide, H. Suzuura and H. Akiyama, Appl. Phys. Lett. 101 (2012) 032108(1-4).
6. Blue 6-ps short-pulse generation in gain-switched InGaN vertical-cavity surface-emitting lasers via impulsive opticalpumping: S. Chen, M. Okano, B. Zhang, M. Yoshita, H. Akiyama and Y. Kanemitsu, Appl. Phys. Lett. 101 (2012)
191108(1-3).
7. Metal-to-insulator transition in anatase TiO2 thin films induced by growth rate modulation: T. Tachikawa, M. Minohara,
Y. Nakanishi, Y. Hikita, M. Yoshita, H. Akiyama, C. Bell and H. Y. Hwang, Appl. Phys. Lett. 101 (2012) 022104(1-4).
8. Quantitative absorption spectra of quantum wires measured by analysis of attenuated internal emissions: M. Yoshita,
T. Okada, H. Akiyama, M. Okano, T. Ihara, L. N. Pfeiffer and K. W. West, Appl. Phys. Lett. 100 (2012) 112101(1-4).
9. † Electrical and Optical Properties of GaNAs/GaAs MQW p-i-n Junctions: K. Arimoto, M. Shiraga, H. Shirai, S.
Takeda, M. Ohmori, H. Akiyama, T. Mochizuki, K. Yamaguchi, H. Miyagawa, N. Tsurumachi, S. Nakanishi and S.
Koshiba, Transactions of the Materials Research Society of Japan 37 (2012) 193-196.
10. † Biexciton Luminescence from Individual Isoelectronic Traps in Nitrogen δ -Doped GaAs: K. Takamiya, T. Fukushima,
S. Yagi, Y. Hijikata, T. Mochizuki, M. Yoshita, H. Akiyama, S. Kuboya, K. Onabe, R. Katayama and H. Yaguchi, Appl.
Phys. Express 5 (2012) 111201(1-3).
11. Sub-5-ps optical pulse generation from a 155-µ m distributed-feedback laser diode with nanosecond electric pulse
excitation and spectral filtering: S. Chen, A. Sato, T. Ito, M. Yoshita, H. Akiyama and H. Yokoyama, Opt. Express 20(2012) 24843-24849.
12. Theoretical Study of Absorption and Fluorescence Spectra of Firefly Luciferin in Aqueous Solutions: M. Hiyama, H.
Akiyama, K. Yamada and N. Koga, Photochemistry and Photobiology 88 (2012) 889-898.
13. Fluorescent Radiation Thermometry at Cryogenic Temperatures Based on Detailed Balance Relation: T. Mochizuki,
T. Ihara, M. Yoshita, S. Maruyama, H. Akiyama, L. N. Pfeiffer and K. W. West, Appl. Phys. Express 6 (2013) 056602(1-3).
14. Dynamics of short-pulse generation via spectral filtering from intensely excited gain-switched 155-µ m
distributed-feedback laser diodes: S. Chen, M. Yoshita, A. Sato, T. Ito, H. Akiyama and H. Yokoyama, Opt. Express
21 (2013) 10597-10605.
15. Gain-switched pulses from InGaAs ridge-quantum-well lasers limited by intrinsic dynamical gain suppression: S.
Chen, M. Yoshita, T. Ito, T. Mochizuki, H. Akiyama and H. Yokoyama, Opt. Express 21 (2013) 7570-7576.

16. Theoretical Study of Firefly Luciferin pKa Values-Relative Absorption Intensity in Aqueous Solutions: M. Hiyama, H.
Akiyama, K. Yamada and N. Koga, Photochem Photobiol 89 (2013) 571-578.
17. † Electroluminescence of GaNAs/GaAs MQWs p–i–n junctions grown by RF-MBE using modulated nitrogen radical
beam source: N. Ohta, K. Arimoto, M. Shiraga, K. Ishii, M. Inada, S. Yanai, Y. Nakai, H. Akiyama, T. Mochizuki,
T. Takahashi, N. Takahashi, H. Miyagawa, N. Tsurumachi, S. Nakanishi and S. Koshiba, Journal of Crystal Growth(2013) S002202481300081X, in print.
18. Double-core-slab-waveguide semiconductor lasers for end optical pumping: T. Nakamura, T. Mochizuki, C. Kim, S.
Chen, M. Yoshita and H. Akiyama, Applied Physics Express (2013), in print.
19. Intrinsic radiative lifetime derived via absorption cross section of one-dimensional excitons: S. Chen, M. Yoshita, A.
Ishikawa, T. Mochizuki, S. Maruyama, H. Akiyama, Y. Hayamizu, L. N. Pfeiffer and K. W. West, Scientific Reports(2013), in print.
20. Theoretical Study of Oxyuciferin pKa Values; Relative Absorption Intensity in Aqueous Solutions: M. Hiyama, H.
Akiyama, Y. Wang and N. Koga, Chem. Phys. Lett (2013), in print.
21. Spectroscopic study on oxyluciferinluciferase complex in firefly bioluminescent reaction solution and clues tounderstand the color tuning mechanism: Y. Wang, Y. Hayamizu and H. Akiyama, in: 7th International Symposium
on Bioluminescence and Chemiluminescence (ISBC2012, 2012), 172.

I. Matsuda group
We have carried out developments and experiments of the advanced spectroscopies using vacuum ultraviolet and soft X-rays.
1) Time-resolved soft X-ray photoemission researches have been performed at high brilliant soft X-ray beamline SPring-8
BL07LSU with the ultrashort pulse laser. By the pump-probe method, relaxation of photoexcited carriers after the surface
photovoltage effect at various semiconductor surfaces are traced in real time in the picoseconds to nanoseconds-time scale.
2) The M-edge resonant magneto-optical Kerr effect (RMOKE) of a transition metal film was examined by measurementof the rotating analyzer ellipsometry method and by theoretical simulation based on the resonant scattering theory. The
giant Kerr rotation angle over 10 degree at room temperature was observed with vacuum ultraviolet synchrotron radiation at
KEK-PB BL-18A. Significant roles of lifetime of the intermediate state during the scattering process and the Fano-resonancewere identified. The time-resolved measurement of RMOKE was demonstrated with the SCSS free-electron laser to trace
relaxation after the photo-induced demagnetization.
3) The SPring-8 BL07LSU is equipped with a crossed-type long undulator that is designed to generate high-brilliant
soft X-rays with various light polarizations. Degrees of linear (horizontal/vertical) and circular (left/right) polarizations were
evaluated with soft X-ray polarimeter using the rotating analyzer ellipsometry method.
√ √1. Electronic structure study of ultra thin Ag(111) films modified by Si(111) substrate and by the 3 × 3-Ag2 Bi surface:
M. Ogawa, P. M. Sheverdyaeva, P. Moras, D. Topwal, A. Harasawa, K. Kobayashi, C. Carbone and I. Matsuda, J. Phys.:
Condens. Matter 24 (2012) 115501(1-6).
2. Atomic configuration and phase transition of Pt-induced nanowire on Ge(001) surface studied by scanning tunnelingmicroscopy, reflection high-energy positron diffraction and angle resolved photo-emission spectroscopy: I. Mochizuki,
Y. Fukaya, A. Kawasuso, K. Wada, T. Hyodo, K. Yaji, A. Harasawa and I. Matsuda, Phys. Rev. B 85 (2012)
245438(1-6).
3. ∗ Development of soft X-ray time-resolved photoemission spectroscopy systemwith a two-dimensional angle-resolved
time-of-flight analyzer at SPring-8 BL07LSU: M. Ogawa, S. Yamamoto, Y. Kousa, F. Nakamura, R. Yukawa, A.
Fukushima, A. Harasawa, H. Kondo, Y. Tanaka, A. Kakizaki and I. Matsuda, Rev. Sci. Instrum. 83 (2012) 023109(1-7).
4. Controlling the topology of Fermi surfaces in metal nanofilms: M. Ogawa, A. Gray, P. M. Sheverdyaeva, P. Moras, H.
Hong, L. -C. Huang, S. -J. Tang, K. Kobayashi, C. Carbone, T. -C. Chiang and I. Matsuda, Phys. Rev. Lett. 109 (2012)026802(1-4).
5. Hydrogen-induced surface metallization of SrTiO3 (001): M. D’Angelo, R. Yukawa, K. Ozawa, S. Yamamoto, T.
Hirahara, S. Hasegawa, M. G. Silly, F. Sirotti and I. Matsuda, Phys. Rev. Lett. 108 (2012) 116802(1-5).
6. ∗ Elucidation of Rh-Induced In-Gap States of Rh:SrTiO3 Visible-Light-Driven Photocatalyst by Soft X-ray
Spectroscopy and First-Principles Calculations: S. Kawasaki, K. Akagi, K. Nakatsuji, S. Yamamoto, I. Matsuda, Y.
Harada, J. Yoshinobu, F. Komori, R. Takahashi, M. Lippmaa, C. Sakai, H. Niwa, M. Oshima, K. Iwashina and A.
Kudo, J. Phys. Chem. C 116 (2012) 24445-24448.

√√
7. Atomic and electronic structures of Si(111)- 21 × 21 superstructure: Y. Fukaya, K. Kubo, T. Hirahara, S. Yamazaki,
W. H. Choi, H. W. Yeom, S. Hasegawa, A. Kawasuso and I. Matsuda, e-J. Surf. Sci. Nanotechnology 10 (2012)
310-314.
√√
8. Structural analysis of Si(111)- 21 × 21-(Ag, Cs) surface by reflection high-energy positron diffraction: Y. Fukaya,
I. Matsuda, R. Yukawa and A. Kawasuso, Surface Science 606 (2012) 1918-1921.
9. Time-resolved photoelectron spectroscopies using synchrotron radiation: Past, present, and future: S. Yamamoto and
I. Matsuda, J. Phys. Soc. Jpn. 82 (2013) 021003(1-18).
10. Electronic structure of the hydrogen-adsorbed SrTiO3(001) surface studied by polarization-dependent photoemission
spectroscopy: R. Yukawa, S. Yamamoto, K. Ozawa, M. D’Angelo, M. Ogawa, M. G. Silly, F. Sirotti and I. Matsuda,
Phys. Rev. B 87 (2013) 115314(1-6).
11. 金属超薄膜内に閉じ込められた電子系のフェルミ面トポロジー制御-量子効果で銀細工: 永村 直佳, 小河 愛実, 松
田 巌, 固体物理 48 (2013) 13-19.

Kobayashi group
We have developed a Dual-comb spectroscopy setup, Multi-GHz repetition-rate mode-locked laser, and precision
spectroscopy in VUV.
1. Chirped-pulse direct frequency-comb spectroscopy of two-photon transitions: A. Ozawa and Y. Kobayashi, Phys. Rev.
A 86 (2012) 022514(1-6).
2. ∗ Generation of soft x-ray and water window harmonics using a few-cycle, phase-locked, optical parametricchirped-pulse amplifier: N. Ishii, S. Adachi, Y. Nomura, A. Kosuge, Y. Kobayashi, T. Kanai, J. Itatani and S. Watanabe,
Opt. Lett. 37 (2012) 97-99.
3. † Vacuum ultraviolet frequency combs generated by a femtosecond enhancement cavity in the visible: B. Bernhardt, A.
Ozawa, A. Vernaleken, I. Pupeza, J. Kaster, Y. Kobayashi, R. Holzwarth, E. Fill, F. Krausz, T. W. Hänsch and T. Udem,
Opt. Lett. 37 (2012) 503-505.
4. Injection locking of Yb-fiber based optical frequency comb: N. Kuse, A. Ozawa, Y. Nomura, I. Ito and Y. Kobayashi,
Optics Express 20 (2012) 10509-10518.
5. Kerr-lens mode-locked Yb:KYW laser at 4.6-GHz repetition rate: M. Endo, A. Ozawa and Y. Kobayashi, Optics
Express 20 (2012) 12191-12197.
6. Comb-Resolved Dual-Comb Spectroscopy Stabilized by Free-Running Continuous-Wave Lasers: N. Kuse, A. Ozawa
and Y. Kobayashi, Appl. Phys. Express 5 (2012) 112402(1-3).
7. vuv frequency-comb spectroscopy of atomic xenon: A. Ozawa and Y. Kobayashi, Phys. Rev. A 87 (2013) 022507(1-4).

Itatani group
We have developed a novel BIBO-based intense optical parametric amplifier system that produces 0.55-mJ, 9-fs pulses at 1.6µ m at a repetition rate of 1 kHz with stable carrier-envelope phases. High harmonics are successfully produced with thislight source, and we observed CEP-dependent coherent soft x rays that extend to ∽330 eV in photon energies. This is thefirst observation of CEP-dependent soft-x-ray high harmonics that extend to the water window. The observed high harmonic
spectra agree quantitatively well with quantum simulation that suggests the generation of isolated attosecond pulses in soft xrays. This result is an important milestone to extend the attosecond optical science from extremely ultraviolet (EUV) to softx rays. We have also started to work on high harmonics beamlines for time-and-angle-resolved photoemission spectroscopy(TARPES) and ultrafast magneto-optical Kerr effect (MOKE) spectroscopy for collaborative research on material sciences.
1. ∗ Generation of soft x-ray and water window harmonics using a few-cycle, phase-locked, optical parametricchirped-pulse amplifier: N. Ishii, S. Adachi, Y. Nomura, A. Kosuge, Y. Kobayashi, T. Kanai, J. Itatani and S. Watanabe,
Opt. Lett. 37 (2012) 97-99.
2. Sub-two-cycle, carrier-envelope phase-stable, intense optical pulses at 16&nbsp;µ m from a BiB3 O6 optical parametricchirped-pulse amplifier: N. Ishii, K. Kaneshima, K. Kitano, T. Kanai, S. Watanabe and J. Itatani, Opt. Lett. 37 (2012)4182-4184.
3. 高強度レーザーによる再衝突物理: 板谷 治郎, パリティ 27 (2012) 11-19.

Harada group1) We have upgraded our ultrahigh resolution soft X-ray emission spectrometer to increase the detection efficiency byimplementing a pre-focusing mirror in front of the grating. The upgrade was successful and has improved the performanceof the spectrometer by a factor of three without losing energy resolving power.
2) We have studied hydrogen bond property of water using O 1s resonant X-ray emission spectroscopy (XES).
Spectroscopic evidence of inhomogeneity in liquid water, i.e. tetrahedrally coordinated and highly distorted hydrogenbond picture of water, depends on the character of the pre-edge peak in the O 1s X-ray absorption spectrum (XAS).
In the recombination emission spectrum at resonant excitation to the pre-edge, we have observed vibrational excitations
characteristic of a highly broken hydrogen bond, which strengthen the inhomogeneous picture of liquid water.
3) Determination of oxygen reduction active site in carbon based fuel cell cathode catalyst is a critical issue tosystematically improve the catalytic activity. This year we have studied the problem by the following two in situ and one inoperando experiments; i) In situ C 1s, N 1s and O 1s XAS, XPS and XES experiments to elucidate O2 adsorption propertyof nitrogen doped HOPG as a model of the carbon based catalyst. ii) In situ N 1s and O 1s XAS and XES to elucidate O2
adsorption property of highly active carbon based catalyst mixed with Nafion211. iii) In operando XAS and XES to elucidate
O2 adsorption property of carbon based catalyst embedded in a membrane electrolyte assembly (MEA). We have fabricated an
original cell for the MEA experiments. The electronic structure of metals in metallo-phthalocyanine derived fuel cell cathodecatalysts under operation (gas condition/ bias application) was obtained for the first time. Combining these three experiments
we concluded that nitrogen should contribute to the high oxygen reduction activity at high pyrolysis temperatures above 800◦ C while at low (< 600 ◦ C) temperatures the residual iron regains oxygen adsorption property through mixture with Nafion
and possibly contribute to the oxygen reduction activity.
1. †∗ Ultrahigh resolution soft x-ray emission spectrometer at BL07LSU in SPring-8: Y. Harada, M. Kobayashi, H. Niwa,
Y. Senba, H. Ohashi, T. Tokushima, Y. Horikawa and S. Shin, Rev. Sci. Instrum. 83 (2012) 013116(1-6).
2. ∗ Elucidation of Rh-Induced In-Gap States of Rh:SrTiO3 Visible-Light-Driven Photocatalyst by Soft X-ray
Spectroscopy and First-Principles Calculations: S. Kawasaki, K. Akagi, K. Nakatsuji, S. Yamamoto, I. Matsuda, Y.
Harada, J. Yoshinobu, F. Komori, R. Takahashi, M. Lippmaa, C. Sakai, H. Niwa, M. Oshima, K. Iwashina and A.
Kudo, J. Phys. Chem. C 116 (2012) 24445-24448.
3. ∗ 液体水分子の内殻電子励起ダイナミクスと局所構造: 原田 慈久, 徳島 高, 堀川 裕加, 丹羽 秀治, 木内 久雄, 小林
正起, 尾嶋 正治, 辛 埴, しょうとつ 10 (2013) 14-20.

Joint Use Projects
Jointuse group
1. †∗ Electrospinning Synthesis of Wire-Structured LiCoO2 for Electrode Materials of High-Power Li-Ion Batteries: Y.
Mizuno, E. Hosono, T. Saito, M. Okubo, D. Nishio-Hamane, K. Oh-ishi, T. Kudo and H. Zhou, J. Phys. Chem. C 116(2012) 10774-10780.
2. †∗ Hulsite from Sengendera skarn deposit, Miyazaki, Japan: Y. Ogoshi, T. Minakwa and D. Hamane, Japanese Magazineof Mineralogical and Petrological Sciences 41 (2012) 61-66.
† Joint research with outside partners.

∗ Joint research between groups within ISSP.