The Institute for Solid State Physics
The University of Tokyo

2013

Activity Report
2013

Preface		1

Research Highlights		

2 - 25Highlights of Joint Research

26 - 47

International Conferences
and Workshops

48 - 51

ISSP Workshops		

52 - 57

Subjects of Joint Research

58 - 123

Publications

124 - 157

Preface

We are pleased to present the annual ISSP Activity Report for
the academic year 2013. ISSP (Institute for Solid State Physics) wasestablished in 1957 as a joint-use research institution attached to the
University of Tokyo. Since then both in-house research and collaboration with external users have been essential elements of the activities
of ISSP.
The research at ISSP has been pursued along two major directions.
Synthesis of new materials and nano-structures in search for novel
phenomena and functions using advanced and original techniques is at
the core of modern condensed matter science. Such activities are being
conducted by relatively small independent groups at ISSP and their collaborators. At the same time, importance of large experimental and computational facilities in materials science has been rapidly increasing inrecent years. An important mission of ISSP is active participation in the development and operation of some ofthose large facilities that are difficult to maintain for typical university faculties. Notable achievements in thisdirection are summarized below.
(1) ISSP has been operating supercomputers dedicated to materials science. In addition, the Center ofComputational Materials Science 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 the users access to advanced spectroscopy using quantum beams such as neutrons and synchrotron
light sources. Although it is a pity for the neutron scattering society that the JRR-3 reactor at Tokai has been
still shut down after the earthquake in 2011, the pulse spectrometer at J-PARC is now in operation. The latest
development is the opening of the new Laser and Synchrotron Research Center in 2012, which is aimed atmaking a new frontier of advanced spectroscopy by combining laser, synchrotron, and X-FEL light sources inultraviolet and soft X-ray region.

June, 2014

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

ISSP Activity Report 20131

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

Multiband Superconductivity
with Unexpected Deficiency of
Nodal Quasiparticles in CeCu2Si2
Sakakibara GroupThe gap symmetry of unconventional superconductors has attracted much attention of scientific community
because it is closely related to the exotic pairing mechanism.
CeCu2Si2 (Tc ~ 0.6 K) is a historically important compoundthat made a breakthrough in the field of superconductivity;
in 1979, exotic superconductivity was discovered for the
first time in this strongly-correlated heavy-electron system[1]. Until quite recently, its gap symmetry was believed to
be a nodal d-wave pairing mediated by spin fluctuations[2]. The presence of line nodes had been suggested fromthe power-law temperature dependence of various physicalquantities, such as the NMR relaxation rate 1/T1 [3] and thespecific heat, both of which were measured in the intermediate temperature region above 0.1 K. Recent interest has
been focused on the location of line nodes: whether the gap
symmetry is dx2−y2 or dxy type [4,5].
To elucidate the gap symmetry of CeCu2Si2, we performed
specific-heat measurements at low temperatures down
to 40 mK using a high-quality single crystal (S-type)[6].
Quite unexpectedly, the zero-field specific heat Ce exhibits
exponential temperature dependence below 80 mK (Fig.
1(a)), reminiscent of full-gap superconductivity. In addition,
we provide thermodynamic evidence for nodeless superconductivity that the low-temperature specific heat is proportional to the magnetic field at low fields for all field orienta-

Fig. 2. The calculated Fermi surfaces of CeCu2Si2 colored by themagnitude of the Fermi velocity νF.

tions and does not change with the c-plane field rotation. We
found that the temperature dependence of the zero-field Ce /T
including the linear behavior in the intermediate-T region canbe reproduced on the basis of a phenomenological two-gap
model within the conventional BCS framework using two
BCS gaps, Δ1 = 1.76kBTc and Δ2 = 0.7kBTc, whose weights
are 65% and 35% of the total density of states, respectively(Fig. 1(b)). We also found anomalous behaviors in the field
variations of the specific heat as well as the magnetization at
low temperatures in the high-field regime (Fig. 1(c)), which
can be interpreted as a strong Pauli paramagnetic effectoccurring in a multiband superconductor. All the present
results match with the prediction of multiband superconductivity in the absence of nodal quasiparticles.
One may suspect that line nodes might exist in the gap
on light-mass bands, since the specific heat measurement
mainly probes the heavy-mass band. To get an insight into
the band structure of CeCu2Si2, we have performed firstprinciples calculations by the LDA+U method. As shown in
Fig. 2, CeCu2Si2 has a flat electron band around the X pointwith the heaviest mass and two hole bands around the Zpoint. In this Fermi-surface topology, the deficiency of nodal
quasiparticles requires the negligibly small effective mass ofthe two light-mass bands, which contradicts the multiband
feature detected from the specific-heat measurement. This
leads to a conclusion that the pairing symmetry of CeCu2Si2
is not the anticipated d-wave state, but the multiband full-gap
state, including an unconventional s-wave such as s±-wave,
a conventional s-wave, or a fully-gapped d+id state. Thesefindings would open a new door into electron pairing in
CeCu2Si2 and help understand the pairing mechanism of
exotic superconductors.
References[1] F. Steglich et al., Phys. Rev. Lett. 43, 1892 (1979).
[2] O. Stockert et al., Nat. Phys. 7, 119 (2011).
[3] Y. Kitaoka et al., J. Phys. Soc. Jpn. 55, 723 (1986).
[4] H. A. Vieyra et al., Phys. Rev. Lett. 106, 207001 (2011).
[5] I. Eremin et al., Phys. Rev. Lett. 101, 187001 (2008).
[6] S. Kittaka et al., Phys. Rev. Lett. 112, 067002 (2014).

Fig. 1. (a) Temperature dependence of the electronic specific heat of
CeCu2Si2 divided by temperature, Ce /T, for H // [100]. (b) Temperaturedependence of Ce /T at zero field, where the T-dependent normal-state
contribution is subtracted. The solid line is a best fit to the two-gap
BCS model. (c) Field-temperature phase diagram for H // [100] and acontour plot of the superconducting contribution to Ce /T. Anomalous
behavior that can be ascribed to the Pauli paramagnetic effect is clearlyseen in the high-field and low-temperature region below 0.1 K.

2

ISSP Activity Report 2013

Authors
S. Kittaka, Y. Aoki, Y. Shimura, T. Sakakibara, S. Seiroa, C. Geibela,
F. Steglicha, H. Ikedab, K. MachidacaMax-Planck-Institute for Chemical Physics of SolidsbKyoto Universityc
Okayama University

Gapless Quantum Spin Liquid State ina Purely Organic Spin-1/2 Triangular
Lattice κ-H3(Cat-EDT-TTF)2
Mori GroupA quantum spin-liquid (QSL) state is an exotic groundstate where interacting spins continue to fluctuate without
any formation of long-range magnetic order (LRMO) evenat a sufficiently low temperature. A variety of QSL states
have been theoretically predicted, but nevertheless, a systematic understanding of the elementary excitation from theexperiments remains an arduous challenge. This is mainly
because of the rareness of the experimental candidates,
which are still restricted to the several spin-frustrated lattices,such as triangular, kagome, and hyperkagome lattices.
Recently, Mori group has discovered gapless quantum spin
liquid state in a purely organic spin-1/2 triangular latticeκ-H3(Cat-EDT-TTF)2 (abbreviated as κ-H)[1,2]. In thisarticle, the results of SQUID and torque magnetometry
suggesting the QSL state with gapless magnetic excitations in purely organic single-component molecular Mott
insulator, κ-H, have been demonstrated [3].
Samples were prepared by the electrochemical oxidation of H2Cat-EDT-TTF molecules in the presence of a base[1, 2]. A characteristic structural feature of this material isthat, in a 2D layer, two face-to-face (H2Cat-EDT-TTF)0.5+
molecules form a strongly dimerized molecular unit, asshown in Fig. 1(a). Because of the strong dimerization, a
dimerized unit can be treated as one site, resulting in an
effective spin 1/2 per site. As schematically illustrated in Fig.
1(b), each spin is arranged on the triangular mesh with theanisotropy parameter t’/t ~ 1.48 at T = 50 K, where t and t’
are the hopping integrals around the sides of rhomboids andalong one diagonal, respectively. It is specific that this Mott
insulator contains only conducting layers linked by hydrogenbonds without anion layers (Fig. 1(c)), namely purelyorganic single-component quantum spin liquid crystal.
Firstly, we measured the static magnetic susceptibility
at 1 T employing a magnetic property measurement system(Quantum Design) in the temperature region from 2 to 300 K

Fig. 1. (a) Molecular arrangement in a two-dimensional layer (b-cplane) of κ-H3(Cat-EDT-TTF)2. The dotted ellipsoids denote thestrongly dimerized molecules. (b) A schematic of the anisotropic triangular lattice with transfer integrals t’ and t. The closed circles and thearrows on them represent the sites of the triangular lattice composedof the dimerized molecules and the S = 1/2 spins, respectively. (c) The
interlayer packing structure viewed in the a-c plane. The adjacent layers
are connected by hydrogen bonds. The dotted ellipsoids represent
dimerized molecules similar to those described in (a).

Fig. 2. Magnetic susceptibility as a function of temperature χ(T) on
a semilogarithmic plot. The black diamonds denote the result of the
SQUID measurement at 1 T. The red squares represent χ(T) estimatedfrom the torque at 10 T for a–b rotation. The susceptibility χ(T) for thea–b rotation is normalized to χ(50 K) from the SQUID measurement.
The χ(T) is nearly independent of temperature below T ~ 3 K, possibly
being attributed to the Pauli paramagnetic contribution and suggesting
the presence of gapless magnetic excitations in the QSL state.

using poly-crystalline samples of ~16 mg (Fig. 2). The entire
temperature dependence of χ is roughly described by theS = 1/2 Heisenberg antiferromagnetic model of an isotropic
triangular lattice, with an antiferromagnetic exchangecoupling constant J/kB ~ 80–100 K. To shed light on themagnetic properties at lower temperatures, we measured themagnetic torque. As the magnetic torque only detects theanisotropic susceptibility in principle, the isotropic contribution from impurity spins is naturally eliminated, providing
us with the intrinsic low temperature magnetic properties.
For our system, it should be noted that sinusoidal behavior
with two-fold periodicity is observed up to H = 17 T anddown to T = 50 mK. Moreover, the observed amplitude of
the sinusoidal torque curve is precisely proportional to thesquare of the magnetic field. These observations indicatethat the system remains paramagnetic even at T = 50 mK.
The above argument about the torque together with thesusceptibility χ(T) reveals that spin frustration on the triangular lattice strongly suppresses the formation of long-range
antiferromagnetic order even at J/kB / T ~ 103, suggesting thedevelopment of the QSL state as the ground state. Secondly,
we focus on the excitation spectrum of the QSL state. In
Fig. 2, χ(T) from torque magnetometory is normalized usingχ determined from the SQUID measurement. What is notablein Fig. 2 is that χ(T) is nearly independent of temperature below T ~ 3 K, possibly being attributed to the Pauliparamagnetic contribution. This suggests the presence ofgapless magnetic excitations in the QSL state.
In conclusion, we report the results of SQUID and torquemagnetometry of an organic spin-1/2 triangular-latticeκ-H3(Cat-EDT-TTF)2. Despite antiferromagnetic exchange
coupling at 80–100 K, we observed no sign of antiferromagnetic order down to 50 mK owing to spin frustration on thetriangular lattice. In addition, we found nearly temperatureindependent susceptibility below 3 K associated with Pauliparamagnetism. These observations suggest the development of gapless quantum spin liquid as the ground state. On
the basis of a comparative discussion, we point out that thegapless quantum spin liquid states in organic systems share apossible mechanism, namely the formation of a band with a
Fermi surface possibly attributed to spinons.

ISSP Activity Report 20133

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).
[3] T. Isono, H. Kamo, A. Ueda, K.Takahashi, M. Kimata, H. Tajima,
S. Tsuchiya, T. Terashima, S. Uji, and H. Mori, Phys. Rev. Lett. 112,
177201 (2014).
Authors
T. Isono, H. Kamo, A. Ueda, K. Takahashia, M. Kimata, H. Tajima, S.
Tsuchiyab, T. Terashimab, S. Ujib, and H. MoriaKobe UniversitybNational Institute for Materials Science

Quantum Criticality in a Metallic Spin
Liquid System Pr2Ir2O7
Nakatsuji GroupAt finite temperatures, electronic magnetic moments inmagnetic materials are thermally fluctuating and one may
have magnetic phase transitions accompanied by critical
thermal fluctuations. This transition temperature can belowered by controlling external parameters like pressure andmagnetic field. In temperature near absolute zero, thermal
fluctuations will be reduced, allowing quantum fluctuations
to take effect. When the quantum fluctuations are strong
enough, one may have a phase transition at absolute zero,
namely quantum phase transition. In the vicinity of thequantum phase transition point, anomalous magnetic andmetallic behaviors may be observed, such as high-Tc superconductivity in the cuprates and iron pnictides, and unconventional superconductivity in the heavy fermion systems.
These phenomena are stemmed from the anomalous metallic
state around the quantum critical point.
Intensive studies on quantum critical phenomena havebeen done on the groups of compounds so called heavy
fermion systems. It is well known that the tuning of theexternal parameters by applying pressure or magnetic field
suppresses the magnetic order down to absolute zero, leading
to the emergence of quantum criticality along with the evolution of exotic phase such as anomalous superconductors.
Here we have revealed the existence of quantum criticality ina metallic spin liquid system Pr2Ir2O7, which may provide a
key insight on the mechanism of large spontaneous anomalous Hall effect observed in its spin liquid state [1-4]. In
this material, Pr ions form the pyrochlore structure, wherethe vertices of the corner sharing network of tetrahedra areoccupied by Pr ions' Ising type spins, and the ferromagnetic
interaction between them causes geometrically frustrated

Fig. 1. Schematic phase diagram of temperature (T) vs. external parameters in strongly correlated electron systems.

4

ISSP Activity Report 2013

Fig. 2. (a) Temperature dependence of the magnetic Grüneisenratio ΓH of Pr2Ir2O7. The divergent behavior of ΓH appears withdecreasing of a magnetic field. (b) Critical scaling of the magnetic
Grüneisen ratio ΓH for Pr2Ir2O7. This analysis evidences a zero-field
quantum critical point in the material.

spin ice state. As a result, the ground state is considered to
be spin liquid, having no dipolar magnetic order. In addition,
the spontaneous Hall effect appears in this spin liquid phase,suggesting the emergence of a chiral spin liquid state which
has finite spin chirality.
In this study, we performed the precise magnetocaloric effect measurements on Pr2Ir2O7 [1]. The magnetic
Grüneisen ratio, which measures the change of temperature
with magnetic field under adiabatic conditions, generally
is known to diverge at the quantum critical point, and thus
this physical quantity is very sensitive to the existence ofquantum criticality.
The results show the divergence of magnetic Grüneisenratio, indicating the existence of quantum criticality. In
addition, the critical scaling which examines the position of aquantum critical point, suggests that Pr2Ir2O7 has a quantum
critical point at zero magnetic field. Therefore, this system islocated at a zero-field quantum critical point without tuningof any external parameter.
In summary, we have found the zero-field quantum criticality in Pr2Ir2O7 as indicated by the divergent Grüneisenratio and zero-field quantum critical point. All these results
suggest that the chiral spin liquid phase accompanied withthe spontaneous Hall effect emerges under the influenceof the quantum criticality led by geometrical frustration.
This supports the manifestation of novel type of "quantum
critical spin liquid" states. Our study highlights the spin ice
as the parent state of the chiral spin liquid state, inducing the
spontaneous Hall effects and many other intriguing quantum
magnetic phenomena as represented by coherent propagation of monopoles. Our findings of quantum criticality which
emerges in a spin liquid state of a highly frustrated metal

require further studies, both experimental and theoretical, on
the group of frustrated metals.
References[1] S. Nakatsuji et al., Phys. Rev. Lett. 96, 087204 (2006).
[2] Y. Machida, S. Nakatsuji, Y. Maeno, T. Tayama, T. Sakakibara, and
S. Onoda, Phys. Rev. Lett. 98, 057203 (2007).
[3] L. Balicas, S. Nakatsuji, Y. Machida, and S. Onoda, Phys. Rev.
Lett. 106, 217204 (2011).
[4] Y. Machida, S. Nakatsuji, S. Onoda, T. Tayama and
T. Sakakibara, Nature 463, 210 (2010).
[5] Y. Tokiwa, J. J. Ishikawa, S. Nakatsuji, and P. Gegenwart, Nat.
Mater. 13, 356 (2014).
Authors
Y. Tokiwaa, J. J. Ishikawa, S. Nakatsuji, and P. GegenwartaaUniversity of Augsburg

respect to the ppv structure. We then demonstrated that thecompound exhibits superconductivity below 4.2 K (Fig. 1).
This is the first report of superconductivity in an isostructuralcompound. Even though the critical temperature is limited to
low temperatures at present, it should be possible to increase
the critical temperature by optimizing chemical composition.
Indeed, the critical temperature reaches the maximum valueof 5.6 K in a slightly N-deficient compound, V3PNx with x= 0.9. This discovery stimulates further explorations of new
superconducting materials with ppv and anti-ppv structures.
References[1] M. Murakami, K. Hirose, K. Kawamura, N. Sata, and Y. Ohishi,
Science 304, 855 (2004).
[2] B. Wang and K. Ohgushi, Scientific Reports 3, 3381 (2013).
Authors
B. Wang and K. Ohgushi

Superconductivity in Anti-Post-Perovskite
Vanadium Compound
Ohgushi Group
Superconductivity, which is a quantum state induced byspontaneous gauge symmetry breaking, frequently emerges
in quasi-two-dimensional materials. The typical examples are
high-critical-temperature cuprate with the layered-perovskite(pv) structure, and other examples include a ruthenate
Sr2RuO4, boride MgB2, hafnium nitride chloride, cobaltate
NaxCoO2•yH2O, an intercalated graphite C6Ca, and ironbased pnictides and chalcogenides. Hence, the layered
character of the host crystal structures is widely believed tobe essential in producing superconductivity. This provides animportant hint for exploring new superconducting materials.
Recently, the post-perovskite (ppv) structural transition of
MgSiO3 was discovered under extremely high-pressure(~120 GPa), and captures great interests because the ppv
MgSiO3 is considered to be the main constitute of the Earth’s
lowermost mantle, D" layer [1]. The ppv structure has apeculiar two-dimensional character, and is expected to be agood platform for superconductivity. However, up to now,
no superconductivity has been observed in isostructural
materials.
We here report the discovery of superconductivity in theanti-post-perovskite (anti-ppv) compounds [2]. We focusedon the vanadium compound V3PN with an anti-ppv structure, where the anion and cation positions are reversed with

Fig. 1. The resistivity of an anti-post-perovskite compound V3PN. The
resistivity drops to zero at low temperature, indicating the onset ofsuperconductivity. The inset shows the crystal structure.

---Division of Condensed Matter Theory------------

Quantum Phase Transitions of the
Hubbard Model on the 1/5-Depleted
Square Lattice
Ueda Group
Quantum phase transition is one of the central issues ofthe present-day condensed matter physics. One of the routes
to approach quantum criticality is to introduce geometricalfrustration. Another way is to deplete lattice sites periodically, leading to weaker connectivity. A typical example
is depletion from the triangular lattice: One can obtain thehoneycomb lattice by the 1/3-depletion and the kagome
lattice by the 1/4-depletion. It is interesting to note that thetight-binding models on the depleted lattices often show
peculiar dispersions like flat bands and/or Dirac cones.
In the present study [1, 2, 3] we investigate Hubbard
model on the 1/5-depleted square lattice, Fig. 1. Although
the lattice structure looks very artificial, this structure canbe found in nature in CaV4O9 or K0.8Fe1.6Se2. The unit cellof this lattice contains four sites and thus the energy band
structure of the non-interacting system has four bands. At thesymmetric point where t1 = t2 the lowest band and the third
one touch at the Γ point, forming a Dirac cone. The second
lowest band intersects the apex of the Dirac cone. Therefore
this characteristic dispersion is relevant to quantum phasetransitions of the Hubbard model on this lattice at quarter
filling [1, 2]. With the Coulomb interaction the ground statephase diagram obtained by the mean field theory changes
from the non-magneteic insulating phase to the paramagnetic
metallic phase, then to an antiferromagnetic metallic phase,and finally to an antiferromagnetic insulating phase, as theratio t2/t1 is increased. Since the Dirac cone is embedded inthreefold degenerate electronic states the effective theory
around the Γ point is SU(3) Dirac electrons. The rich phase
diagram of the Hubbard model is understood by using thiseffective theory.
The quantum phase transitions at half-filling are also very
interesting [3]. It has been known that the Heisenberg model,
which is the effective Hamiltonian in the strong correlation
limit, shows two quantum phase transitions, one from thedimer singlet phase to the insulating phase with the antiferromagnetic long range order and then onto the plaquette singlet
phase. We have looked at the quantum phase transitions of
the Hubbard model as a function of Coulomb interaction

ISSP Activity Report 20135

References[1] Y. Yamashita, M. Tomura, Y. Yanagi, and K. Ueda, Phys. Rev. B 88
195104 (2013).
[2] Y. Yamashita, M. Tomura, Y. Yanagi, and K. Ueda, JPS Proceedings,
SCES2013.
[3] Y. Yanagi and K. Ueda, JPS Proceedings, SCES2013.
Authors
Y. Yamashitaa, M. Tomura, Y. Yanagib, and K. UedaaNihon UniversitybTokyo University of Science

Structural Evolution of 1D Spectral Function
from Low- to High-Energy Limits
Takada GroupThe concept of spin-charge separation plays a central
role in describing low-energy physics near Fermi points ina one-dimensional (1D) interacting electron gas, a typicalexample of the spin-1/2 Luttinger liquid (LL). This concept
may be confirmed in real materials by various experiments,
including the recent high-resolution angular resolved photoemission spectroscopy in which the one-electron spectral
function A(p,ω) can be directly measured in the wide rangeof momentum p and energy ω.
If p is not restricted to the region near the Fermi
momentum pF, the linear spectrum approximation, usuallyadopted in the LL theory, is not sufficient in appropriately
obtaining A(p,ω). In fact, the effect of the nonlinear spectrumon A(p,ω) has been intensively studied in recent years.
According to those studies on integrable systems, A(p,ω)
has singularities for arbitrary p in proportion to |ω-εν(p)|-μν(p)with ν=s and c, where εs(p) and εc(p) are energies of spinand charge collective excitations, respectively. In the usual
LL theory, the exponent μν(p) is independent of p, but thenonlinearity in the electron dispersion makes it depend on
p. Since the edge of support of A(p,ω) is located at ω=εs(p),μs(p) determines the power of the threshold singularity inA(p,ω) and its actual value has been given from the finitesize spectrum obtained by the Bethe-ansatz method. For

6

ISSP Activity Report 2013㻝㻠㻜㻰㼕㼟㼜㼑㼞㼟㼕㼛㼚㻌㼛㼒㻌㼍㻌㼒㼞㼑㼑㻌㼑㼘㼑㼏㼠㼞㼛㼚㻝㻞㻜㼜㻛㼜㻲㻌㻙㻝

under the assumption of paramagnetic states. The nature of
the metal-insulator transition is different depending on theratio of t2/t1. On the dimer side, it is shown by applying thecluster dynamical mean field theory that the metal-insulatortransition is continuous. This continuous Mott transition ischaracterized as a Lifshitz transition driven by the Coulombinteraction.

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Fig. 1. The 1/5-depleted square lattice. One can define either theunique plaquette covering or the dimer covering. We consider the
Hubbard model on this lattice with different hopping matrix elements
for the plaquette bonds or the dimer bonds.

nonintegrable systems, this threshold singularity remains
intact, but the singularity at ω=εc(p) is smeared into a broadpeak.
In those preceding works, only the singularities atω=εs(p) and ω=εc(p) are discussed on the belief that theelectron nature will not sustain in the spin-charge separated
system. For p far away from pF, however, the effect of interactions becomes so weak that we would naively expectthat the nature of an injected electron to measure A(p,ω)
manifests itself as a main peak in A(p,ω). Then a natural
question arises: Does an electron-like excitation mode
actually exist in the 1D interacting electron gas for p muchlarger than pF? If yes, a related and more intriguing question
is: How does the electron-like mode reconcile with thephysics of spin-charge separation for p near pF?
In pursuit of answers to those questions, we havecarefully studied the 1D one-electron Green's function G(p,t)
in momentum space and time and found that for p~pF, its
long-time asymptotic form is composed of three independentmodes of power-law decay [1]. Two of them correspond towell-known spinon and (anti)holon excitations, but the rest
describes the mode of an electron-like particle (pseudoelectron) which may be regarded as an electron dressed with a“cloud” of low-lying spin and charge collective excitations.
This pseudoelectron does not appear as a main structurein A(p,ω) for p~pF and never leads to a finite jump in the
momentum distribution function n(p). As p goes away frompF, the pseudoelectron structure gets broader, but with thefurther increase of p, it becomes less broad and eventually for p>>pF, it evolves as a main and divergent peak inA(p,ω) by swallowing the antiholon mode. Concomitantly,
its dispersion relation approaches the one of a free electron,
allowing us to regard the pseudoelectron as a free electron,
but actually it is not quite, nor the Landau's quasiparticle,
basically because this excitation is accompanied by powerlaw decay. Those results clarify the generic feature of A(p,ω)
in a 1D metal and answer the aforementioned two questions.
As an illustration of the overall behavior of A(p>pF,ω)with the change of p and ω, we adopt the Yang-Gaudin modelin the weak-coupling region in order to explicitly computeA(p,ω). In Fig. 1, the obtained result is displayed withincreasing p from pF to show its complete structural evolution
in the 1D weakly-interacting electron gas with the quadratic
dispersion ξp (=p2/2m-pF2/2m). Since we focus on the regionof ω in the very vicinity of ξp, only the pseudoelectron mode
appears as a singular structure in A(p,ω) in Fig. 1.

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㻜
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㻞
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ξ 㼜㻌㻩㻔㼜㻌㻌㻙㻌㼜㻌㻌㻕㻛㻞㼙㻌㻲㻜㻚㻜㻞Λ: 㼏㼡㼠㼛㼒㼒㻌㼙㼛㼙㼑㼚㼠㼡㼙㻌

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Fig. 1. Structural change of the pseudoelectron peak in the one-electron
spectral function A(p,ω) for the Luttinger liquid (Yang-Gaudin model).
Inset: The entire structure of the spectral function near the Fermi point.

The pseudoelectron introduced here very much resembles
a quasiparticle in higher-dimensional Fermi-liquid systems,
although it is not quite the same, reflecting the specialty of
1D physics. We hope that this concept of a pesudoelectron
will be confirmed in the future through experiment and/or
large-scale numerical calculation with deliberately-chosenparameters so as to avoid its overdamping regime.
Reference[1] H. Maebashi and Y. Takada, Phys. Rev. B 89, 201109 (R) (2014).
Authors
H. Maebashi and Y. Takada

Particle Statistics, Frustration,
and Ground-State Energy
Oshikawa Group
Quantum statistics of identical particles is one of the mostfascinating aspects of quantum mechanics. The wavefunction
does not change when two identical bosons are exchanged,
while it acquires a negative sign when two identical fermionsare exchanged. This fundamental distinction leads to various
differences in physical properties between a system of manybosons and that of many fermions. For example, fermionsobey Pauli exclusion principle, which forbids more than
one particles to occupy the same single-particle state. In
contrast, any number of bosons can occupy the same singleparticle state, concerning the quantum statistics. In fact, at
sufficiently low temperatures, a macroscopic number ofbosons may occupy the same single-particle state. This is
the celebrated Bose-Einstein Condensation, which has been
directly observed in ultracold atoms.
Let us consider two systems with the “identical” Hamiltonian, but the one consists of many bosons and the otherconsists of many fermions. By “identical” Hamiltonian
we mean the single-particle eigenstates and their energy
eigenvalues are identical. Our question is: which system
has the lower ground-state energy, the one of bosons or thatof fermions? It might appear a trivial question, since in theFig. 1. Comparison of the ground-state energies of fermions and hardcore bosons on the square lattice of 26 sites. The horizontal axis is
the number of particles ne per site, and the vertical axis is the flux per
plaquette Φ in unit of the flux quantum Φ0. The ground-state energyof fermions is lower than that of bosons in the colored region, andthe difference is most significant in the red-colored region, where
ne = Φ/Φ0 or an equivalent relation approximately holds.

ground state all the bosons will occupy the lowest-energy
single-particle eigenstate, while most of the fermions will
occupy higher energy single-particle eigenstates because of
the Pauli exclusion principle. Then the ground-state energyof fermions would be always higher than that of bosons.
However, this simple argument is only valid when there isno interaction. When there is an interaction between theparticles, as is the case in realistic systems, the Bose-Einstein
Condensation is not perfect. Thus the comparison is a
nontrivial question in the presence of interaction.
We first proved [1] a theorem which states: even in
the presence of interaction, bosons have a lower groundstate energy if all the hopping amplitudes are positive. This
theorem can be understood in terms of frustration among
quantal phases; if all the hopping amplitudes are positive,
there is no such frustration in the system of bosons whilefermions are subject to frustration due to their quantum
statistics. We can violate the assumption of the theorem
by introducing negative and/or complex hopping amplitudes. This makes it possible that the inequality between
the ground-state energies to be reversed. This again canbe understood in terms of frustration introduced among
hoppings. In fact, we succeeded in constructing several
concrete examples, in which the ground-state energy offermions is lower than that of corresponding bosons [1].
This includes a rigorous proof on the delta-chain case, forwhich the reversal was reported earlier on small clusters [2].
References[1] W. Nie, H. Katsura, and M. Oshikawa, Phys. Rev. Lett. 111, 100402(2013).
[2] S. D. Huber and E. Altman, Phys. Rev. B 82, 184502 (2010).
AuthorsaW.
Nie, H. Katsura , and M. OshikawaaGakushuin University

K-computer Simulation forElectrochemical Energy Conversion
Sugino Group
Energy flows through matters in various forms andcontrolling the energy flow is an important subject of interdisciplinary material research. The energy flow dynamics
is complex but is particularly rich near the interface, where
the energy carrier (particle or field) switches from one toanother. The electrochemical interface offers a field forconverting an ionic flow to the electronic flow, and thisconversion process is used as the principle of a battery.
The corresponding basic process is the electron-transfer
reaction dynamics, which has now attracted renewed attention not only from electrochemistry but also from many otherfields. In this context, this group is intended to describe thedynamics, with the help of the K-computer power, unambiguously within the first-principles molecular dynamics(FPMD) scheme. A simulation team was organized fromresearch groups of Osaka/Tohoku/Nagoya University andnational laboratories (AIST and NIMS). The joint simulationteam has recently made progress toward the goal.
The team modeled the system using a metal slab, asolution slab, and the dielectric continuum slab as shown in
Fig. 1. This model, called the effective screening medium(ESM) model, was originally developed by the present groupin 2006 [1] but was recently improved to enable a precise

ISSP Activity Report 20137

References[1] M. Otani and O. Sugino, Phys. Rev. B 73, 115407 (2006).
[2] N. Bonnet, T. Morishita, O. Sugino, and M. Otani, Phys. Rev. Lett.
109, 266101 (2012).
[3] I. Hamada, O. Sugino, N. Bonnet, and M. Otani, Phys. Rev. B 88,
155427 (2013).
[4] N. Bonnet, O. Sugino, and M. Otani, J. Chem. Phys. 140, 044703(2014).
[5] N. Bonnet, O. Sugino, and M. Otani, to be published in J. Phys.
Chem. C.
AuthorsaaaO. Sugino, b N. Bonnet,b I. Hamada, M. Otani, T. Ikeshoji
,
b
c
d
Y.
Morikawa,
K.
Inagaki,H.
Kizaki
,
K.
Akagi
,
M.
AraidaiaAdvanced Industrial Science and TechnologybOsaka Universityc
Tohoku UniversitydNagoya University

Fig. 1. The ESM modeling of the electrochemical interface. The model
consists of the electrode slab (Pt(111) in the present case), solution slab
(liquid water plus a hydronium ion) and the dielectric continuum. The
continuum is characterized by the dielectric constant. The bias potential
is controlled with the potentiostat scheme [2].

control of the bias potential [2,3]. By this technique one
can describe a subtle imbalance of chemical equilibrium
between the electrons and the ions, essential for studying anelectrochemical process. This algorithm was implemented to
an FPMD code, called STATE-senri, which had been highly
parallelized for K-computer.
One of the first target of this new FPMD scheme wasto investigate how the solvent fluctuation would affect thecatalytic activity. The solvent fluctuation causes the bias
potential to fluctuate, whereby assisting the catalytic reaction
to occur. The fluctuation is small for the bulk catalysts but isincreasingly enhanced as the catalyst is reduced in size. By
combining the simulation with the classical Marcus theory,
the exchange current for the reaction, which is a measure ofcatalytic activity, was found to be enhance by 15 when thesize of nano-particle is reduced to 3 nm in diameter [4]. Thisenhancement factor is indeed a large value which is comparable to (or larger than) that achievable with the nano-shellmethod, i.e., a technique to enhance the activity by alloying
the subsurface Pt. The fluctuation effect has not been
seriously studied so far, but the present calculation suggests
further room for enhancing the catalytic activity by controlling the structure of the interface.
This group has been performing a large number of firstprinciples simulations, with or without the ESM, and theresults have accumulated. With those data, this group hasreconsidered how the reduction of an oxygen moleculewould occur, which is the central issue of electrochemistry
and many efforts have been devoted. When the simulation results were analyzed together with recently available
experimental results, it was found that some of the reaction
pathways can be excluded and accordingly narrowed down
the possibilities [5]. It was then concluded that the reaction
proceeds mainly through a pathway called the associative
pathway in the steady state, while the other one, called thedissociative pathway, is chosen prior to steady state. This
analysis emphasizes importance of the dynamical effect indiscussing the dominant mechanism.
More extensive simulations are now conducted in
K-computer. The team is preparing further for the coming
exa-flops supercomputers to establish a microscopic theoryof electrochemical energy conversion.

8

ISSP Activity Report 2013

Kondo Signature in Heat Transfer
via a Local Two-State System
Kato Group
Heat and electric transport have several similarities aswell as dissimilarities. Fourier's law in heat transport corresponds to Ohm's law in electric transport, and these laws
are commonly categorized as diffusive transport. Ballistictransport leads to the quantization of conductance in electricas well as heat transport. The conductance quantum wasmeasured in mesoscopic electric conduction in 1988, andmuch later, the version of heat transport was also measured[1]. Recently, the concept of thermal diode has also been
discussed, and an experiment has been conducted for demonstrating this [2]. Recent progress in transport studies strongly
indicates that heat transport analogue exists for many categories of electric transport.
We have studied the Kondo effect in heat transport via a
local two-state system [3]. We consider a two-state system
coupled to phonon environments. The two-state system is,for example, obtained from truncation from a symmetricdouble-well system with a small tunneling matrix element
Δ. The present system is described by the spin-boson Hamiltonian with Ohmic dissipation. The cut-off energy of thephonon bath and the dimensionless system-environment
coupling are denoted with ωc and α, respectively. It is known
that the spin-boson model can be mapped onto the Kondo
model with anisotropic exchange coupling. In order toFig. 1. (Main panel) Two different regimes expected in the spin-bosonmodel. (Inset) The thermal conductance calculated by the quantum
Monte Carlo method is shown as a function of the temperature.

study the Kondo-like effect in the phonon systems, we havederived the exact formula of thermal conductance, and haveevaluated it by the quantum Monte Carlo method.
Summary of the results is shown in Fig. 1. The main
figure shows the Kondo regime and the incoherent tunnelingregime in the space of temperature T versus dimensionless coupling strength α. At the bottom of the main figure,mapping onto corresponding anisotropic Kondo model isshown: the antiferromagnetic Kondo (AF-Kondo) and theferromagnetic Kondo (F-Kondo) region are respectively
mapped onto the region of 0<α<1 and 1<α<4 in the spinboson Hamiltonian. Heat transport via the Kondo effect isrealized in the Kondo regime (the orange region).
In the inset of the figure, we show temperature dependence of the thermal conductance κ calculated by thequantum Monte Carlo method. Different legends in the graphdenote with different ratios of Δ/ωc. As seen in the figure, thedata for a fixed α fall onto one curve by appropriate scalingof the temperature and the thermal conductance with the
Kondo temperature TK. This behavior is characteristic of the
Kondo effect. Below the Kondo temperature, conductancefollows the universal temperature dependence proportional
to T3. The obtained thermal conductance is much larger thanthe one expected from stochastic transition of the two-statesystem [4]. This is a manifestation of strong correlation
between system and reservoirs, which is analogous to the
Kondo effect in electric transport. On the other hand, attemperatures higher than the Kondo temperature TK, thethermal conductance becomes proportional to T2α-1. Thisbehavior is understood by a simple approximation based on
the Fermi's golden rule. We note that the thermal conductance is always proportional to T2α-1 for α>1 since the Kondo
temperature is zero.
In summary, we have investigated the Kondo effect inthermal transport via a local two-state system, by utilizing
the spin-boson model with ohmic dissipation. We hopethat our study motivates further research on low-energy
heat transfer via local systems. Other types of dissipation(superohmic/subohmic dissipation) and far-from-equilibrium effect will be intriguing subjects in this direction.
References[1] B. J. Wees et al., Phys. Rev. Lett. 60, 848 (1988); K. Schwab et al.,Nature (London) 404, 974 (2000); H.-Y. Chiu et al., Phys. Rev. Lett.
95, 226101 (2005).
[2] N. Li, J. Ren, L. Wang, G. Zhang, P. Hänggi, and B. Li, Rev. Mod.
Phys. 84, 1045 (2012); C. W. Chang, D. Okawa, A. Majumdar, and
A. Zettl, Science 314, 1121 (2006).
[3] K. Saito and T. Kato, Phys. Rev. Lett. 111, 214301 (2013).
[4] T. Ruokola and T. Ojanen, Phys. Rev. B 83, 045417 (2011).

Fig. 1. Scanning electron micrograph of the gate configuration for the
sample. The gray regions are metallic Schottky gates.

splits electronic spin states according to the direction of
momentum. Electronic states in a QPC structure are a set ofone-dimensional bands with discrete edges due to quantization transverse to the one-dimensional motion. As a result,ordinary conductance of a QPC is quantized with the unit
2of 2e /h, which is called conductance quantum. There
are a number of experimental reports on the anomalousquantization of conductance at a half conductance quantum,
2i.e. e /h, which phenomenon, called 0.5 conductance plateau
has been attributed to the result of perfect spin polarization[1] though direct evidence was not obtained. Such a highspin polarization was also predicted on the 1.0 plateau (i.e.
22e /h) [2] but due to the lack of detection method, there havebeen no experimental confirmation.
We have developed a new technique for the detection of
spin-polarization with time-domain spin blockade. For thatthe two-electron tunneling process from the target device toa quantum dot (QD) is used. When the process is to a single
orbital level, the probability is suppressed while it is not for
the tunneling into two orbital levels. Hence the degree ofsuppression has a direct relationship to the spin-polarizationin the target with the spin-relaxation time in the QD as aparameter.
As the base system, two-dimensional electron gas(2DEG) in an (In, Ga)As quantum well was adopted. The
sample consists of a QPC with a side-coupled QD withanother QPC for the remote charge detection (Fig. 1). The
conductance of the QPC as a function of the gate voltage
shown in Fig. 2 clearly exhibits 0.5 anomalous plateau struc-

Authorsa
K.
Saito and T. Katoa
Keio University---Division of Nanoscale Science--------------------------Nature of Spin Polarization
in a Quantum Point Contact
Katsumoto Group
Creation of spin current in quantum structures of
non-magnetic materials is a key technique in semiconductor spin-electronics (spintronics). The use of spin-orbit
interaction (SOI) and quantum point contact (QPC) structure is a promising candidate. So called Rashba-type SOI

Fig. 2. QPC conductance as a function of the gate voltage. The unit
is the quantum conductance Gq=2e2/h. The insets show bias voltage(VQPC) dependence of spin-polarization of 0.5 Gq and 1.0 Gq plateaus
respectively.

ISSP Activity Report 20139

2

ture in addition to the ordinary quantized plateau at 2e /h.
Spin-polarization measured with the QD detector is shown
as a function of the QPC bias voltage VQPC in the insets ofFig. 2, both for 0.5 and 1.0 plateaus. Here the definition of
spin-polarization P is P = (Nu–Nd) / (Nu+Nd), where Nu andNd correspond to the concentration of up-spin electrons anddown-spin electrons respectively. At zero-bias voltage, P ishigh on 0.5 plateau while it decreases with increasing VQPC.
The differential conductance of the QPC, on the contrary,increases with VQPC indicating that the mechanism of thespin-polarization is a kind of spin-filtering, which cuts
the flow of spin-down electrons. On the other hand at 1.0
plateau, P gradually increases with VQPC, indicating that themechanism here is spin-rotation, which turns up the down
spin of electrons. There is a small dip structure in P near thezero-bias at 0.5 plateau, which reflects the formation of the
Kondo cloud. As just described we have demonstrated thepowerfulness of the present method and revealed the mechanisms of spin-polarization in a QPC with Rashba-type SOI.
References[1] P. Debray et al., Nature Nanotechnology 4, 759 (2009).
[2] M. Eto, T. Hayashi, and Y. Kurotani, J. Phys. Soc. Jpn. 74, 1934
(2005).
[3] M. Kohda et al., Nature Communications 3, 1082 (2012).
Authors
S. Katsumoto, S.W. Kim, T. Nakamura, and Y. Hashimoto

Spin Injection into a Superconducting Niobium
Otani Group
Spintronics is a spin counterpart of electronics and its
potentiality for future applications as well as for novel
physics has boosted a number of researches in recent years.
Among diverse materials, superconductors are promising
for their distinct properties of spin transport; because of asuperconducting energy gap, spins are mediated by quasiparticles and it is theoretically predicted that the spin relaxation
time (τs) is enhanced owing to the reduced group velocity
of quasiparticles. However, previous experimental studies
are not conclusive due to the problems of device structures.
Thus, for both basic physics and applications, it is highly
desirable to estimate τs in superconductors correctly without
spurious effects. In this work [1], we aimed at injecting a

Fig. 2. The relation between τs and I. τs is normalized by that in thenormal state (τsnormal = 2.3 × 10−13 s). As I decreases, τs dramaticallyincreases.

pure spin current into superconductors with a large spin-orbit(SO) interaction and estimating τs appropriately. Through theuse of such superconductors, we can expect more complex
phenomena for further studies where superconductivity,
magnetism and SO interaction are closely coupled.
We fabricated a typical lateral spin valve structure witha superconductor Nb, consisting of two ferromagnetic
Permalloy (Ni81Fe19; Py) wires bridged by a nonmagnetic Cu
wire and a Nb wire inserted below the Cu bridge in between
the two Py wires. By flowing a charge current (I) from oneof the Py wires to the Cu, a pure spin current is generated in
the Cu bridge and partly absorbed into the Nb due to its large
SO interaction. The pure spin current can be detected by theother Py wire, and the detected nonlocal spin valve (NLSV)
signal is reduced when the spin absorption occurs. In ourstudy we performed spin absorption measurements bothabove and below the critical temperature of Nb (TC = 5.5 K).
In Fig. 1, we show a result of the spin absorption
measurements taken at 370 mK, much lower than TC. The
NLSV signal shown here is normalized by I. Above TC, it isindependent of I (not shown here), as expected for normal
metals. Far below TC, on the other hand, the NLSV signal
obviously increases as I decreases, indicating the suppressionof the spin absorption at the Nb wire. In order to evaluate theamount of the pure spin current absorbed from Cu into Nb,
we calculated the density of states of the superconducting
Nb using the Usadel equation where the superconducting
proximity effect between Cu and Nb is taken into account.
In the Usadel equation, τs of the superconducting Nb istreated as a free parameter. With this parameter, we canreproduce the NLSV signal for each I, and simultaneously
obtain τs. The obtained data are shown in Fig. 2. τs is clearlyenhanced with decreasing I. To know the relation between I
and temperature, we also measured the interface resistance
between Cu and Nb as functions of I and temperature, andfound that the effective temperature (T) at the interface
is increased by I. These results clearly demonstrate theenhancement of τs in a superconductor with decreasing T
consistent with the theoretical prediction [2].
References[1] T. Wakamura, N. Hasegawa, K. Ohnishi, Y. Niimi, and Y. Otani,
Phys. Rev. Lett. 112, 036602 (2014).
[2] T. Yamashita, S. Takahashi, H. Imamura, and S. Maekawa, Phys.
Rev. B 65, 172509 (2002).

Fig. 1. NLSV signals Rs measured at 370 mK (< TC) with two different
currents I = 20 μA (red) and 100 μA (blue).

10

ISSP Activity Report 2013

Authors
T. Wakamura, N. Hasegawa, Y. Niimi, and Y. Otani

One-dimensional Fermi Surface
is Stabilized on Ge Surface Even
at Low Temperature
Komori group
In solid-state physics, we learn that electrons in
one-dimensional metals undergo metal-to-insulator transition induced by the Peierls instability due to electron-phonon
interaction or exhibit a Luttinger liquid behavior due toelectron-electron interaction with decreasing temperature.
Atomic nanowires formed on semiconductor surfaces offer
an opportunity to investigate such intriguing phenomena of
one-dimensional metals. So far, however, their manifestations are largely disturbed by the presence of defects in the
nanowires. Highly-ordered atomic nanowires at surfaces
are thus essential not only for clarifying if they exhibit thePeierls instability or a Luttinger liquid behavior, but also forunderstanding universal nature of one-dimensional electronicsystems. On the Ge(001) surface, defect- and kink-free
Pt-induced atomic nanowires (Pt/Ge(001) NWs) can beformed, and are very suitable for the study of one-dimensional electrons. [1,2,3] We have investigated the groundstate electronic properties of Pt/Ge(001) NWs at the Fermi
level (EF) in situ by angle-resolved photoelectron spectroscopy at 6 K, a sufficiently lower temperature than its structural phase transition at 80 K, using single-domain samples
shown in Fig. 1.
Figure 2(a) shows the Fermi-surface mapping at 6 K. Twometallic surface bands labeled S1 and S2 are clearly identified. The Fermi surface of S1 consists of straight lines in the
ky direction, indicating that the S1 band disperses only inthe nanowire direction. It is therefore an ideal one-dimensional metallic state which is decoupled from neighboring
electronic systems. As shown in Fig. 2(b,c), it exhibits asteep dispersion and clearly crosses EF in the substrate bulk
band gap. Obviously, there is no gap opening at EF. Thus,
the S1 band does not directly contribute to the structuralphase transition at 80 K and is stable against the Peierls
instability if it exists. The electron-phonon interaction could
not be strong enough to induce any structural transition with
the nesting vector for S1 by the Peierls instability scheme.
In order to examine a Luttinger liquid behavior, the energy
distribution curve of S1 was analyzed as shown in Fig. 2(d).
The observed spectral shape agrees with the normal FermiDirac-type distribution function without any indication of
the power-law behavior predicted for a Luttinger liquid.
These novel results provide not only a valuable contribution

Fig. 1. STM images of Pt/Ge(001) nanowires (NW) on a vicinal
Ge(001) substrate. The substrate was tilted toward the [̅110] directionby 2˚. Most of wide terraces are covered by the nanowires parallel tothe step edges. The areas surrounded by purple lines in (left) represent
minority domains. In both images, the bias voltage is 1.5 V and thetunneling current 0.5 nA.

Fig. 2. (a) Constant energy ARPES intensity map at EF of Pt/Ge(001)
NWs with single-domain samples formed on the vicinal Ge(001)substrate. The photoelectron_ _intensity is represented by color scale. (b)ARPES image taken along ΓJ. Dashed curves represent the band structures of S1 and S2, which were fitted to the data. (c) Schematic illustration of the S1 and S2 bands. (d) Integrated energy distribution curve of
S1 near EF over ky in the surface Brillouin zone is compared with theresults of a Ta foil.

to the phenomenology of nanowires/semiconductor systems
but also a major advance for understanding the intriguing
physics of the one-dimensional electrons on solid surfaces.
References[1] Gürlu et al., Appl. Phys. Lett. 83, 4610 (2003).
[2] I. Mochizuki et al., Phys. Rev. B 85, 245438 (2012).
[3] K. Yaji et al., Phys. Rev. B 87, 241413(R) (2013).
Authors
K. Yaji, I. Mochizukia, S. Kim, Y. Takeichia, A. Harasawa, Y. Ohtsubob,
P. Le Fèvreb, F. Bertranb, A. Taleb-Ibrahimib, A. Kakizaki, andF. KomoriaHigh Energy Accelerator Research Organizationb
Synchrotron SOLEIL

Fabrication, Spectroscopic Characterization
and Transport Properties of Aromatic
Monolayers Covalently bonded to Si(111)
Yoshinobu Group
Fabrication of self-assembled monolayers (SAMs) oforganic molecules on semiconductor surfaces is one of
the central issues in surface science and device chemistrybecause of its ability to impart renewed functionalities on thesurfaces. Since well-ordered and dense organic SAMs can be
fabricated without severe reaction conditions and expensive
equipment, organic SAMs on a semiconductor have become
attractive materials that are easily accessible model systems
for both fundamental scientific research and development ofpractical molecular devices. Among various semiconductor–
organic interface structures, Si-organic molecule systems arepromising candidates for future applications because of theactual proven performance of Si in today’s electronics.
In this study [1], SAMs composed of aromatic moleculeswith different anchor groups were fabricated on the Si(111)
surfaces by wet chemical reactions. We investigated thebonding structures and transport properties by spectroscopic
and electrical measurements, respectively. By using simple

ISSP Activity Report 201311

Fig. 1. (left) Schematic representations of the aromatic monolayers on
Si(111) in this study [Si(111)–O–Ph (green), Si(111)–C–C–Ph (blue),and Si(111)–C=C–Ph (red)]. (right) Transmission FT-IR spectra ofthese Si(111)-aromatic SAMs measured at an incident angle of 60°.
Copyright © 2013 American Chemical Society.

aromatic molecules (phenol, styrene, and phenylacetylene) as
initial precursors, we successfully fabricated aromatic SAMs
covalently bonded to Si(111) surfaces through different
anchor structures (Si–O–, Si–CH2–CH2–, and Si–CH=CH−).
Transmission infrared spectra clearly indicate that the phenyl
rings in the SAMs are oriented almost perpendicular to theSi surfaces. High-resolution X-ray photoelectron spectrausing synchrotron radiation (KEK-PF BL13) reveal thatthe aromatic molecules attach to the Si surface with thesurface coverage of ~ 0.5. These experimental results lead toa conclusion that the aromatic SAMs form densely packed
monolayers on Si(111) using the present wet chemical
methods. Judging from the current density–voltage measurements of Hg/aromatic SAM–Si(111) sandwiched structures,the “Si(111)–O–Ph” (SAM by using phenol) system showshigher conductivity compared with the long-chain alkyl
SAM on Si(111).

a hole whose phase is conjugated with that of the electron.
Elastic scatters redirect reflected electrons/holes toward
the interface, making a loop in their trajectories with theinterface. Because of constructive quantum interference dueto the phase conjugation, the looped trajectories enhance
the probability of the Andreev reflection and consequently
proximity effect. As the Andreev-reflected quasiparticles cantunnel though the interface without reflection, the enhancement is called reflectionless tunneling.
Using scanning tunneling microscopy (STM), we studied
the proximity effect and the roles of the atomic-scale defects
in real-space with nano-meter scale spatial resolution. The
measurement was performed at 2.15 K in ultrahigh vacuum.
The proximity effect was characterized via tunnelingspectroscopy of a gap formed by the pair correlation at the
Fermi energy. The investigated super/normal interface wasformed in situ by creating superconducting Pb islands on a
Pb-induced two-dimensional (2D) normal metal formed ona Si substrate. In Fig. 1, a topographic STM image (left) anda mapping of the corresponding conductance at the bottomof the gap, that is, zero bias conductance (ZBC) mapping(right), are shown.
In the ZBC mapping, all Pb islands are colored green,
which indicates zero ZBC and good superconductivity there,
and the normal metal far from the Pb islands is coloredyellow, indicating no gap there. The area surrounding the Pb
islands has the color of blue to red, implying a gap formation by the proximity effect. The gap propagates from thesuperconducting Pb islands and decays into the normal metal
with the coherence length ξ of 40 nm. It is found from themapping that the proximity effect strongly depends on theatomic structure of the interface; it is strong at the place
where a Pd island is directly sitting on the 2D layer, andReference[1] Y. Harada, T. Koitaya, K. Mukai, S. Yoshimoto, and J. Yoshinobu,
J. Phys. Chem. C 117, 7497 (2013).
Authors
Y. Harada, T. Koitaya, K. Mukai, S. Yoshimoto, and J. Yoshinobu

Visualization of "Reflectionless Tunneling"in the Superconducting Proximity EffectFig. 1. (left) STM image of Pb islands on a Pb-induced two-dimensional normal metal formed on a Si substrate (1.0 μm square). The
edges of the Pb islands and the steps of the normal metal layer are
highlighted with white and black dotted lines, respectively. (right) The
zero-bias conductance (ZBC) color map of the same area as in the
topographic image.

Hasegawa and Kato Groups
When a superconducting material is brought into contact
with a normal metal, superconducting properties penetrate
into the metal. The phenomenon called proximity effecthas been utilized to induce the pair correlation into various
materials, including topological insulators to realize elucidating Majorana fermions.
The propagation of the proximity effect depends on the
distribution of scattering centers in the normal metal, as you
may expext. But curiously, it is enhanced by the presenceof elastic scatters. The proximity effect is caused by the
Andreev reflection at the super/normal interface, where
injected electrons from the normal metal is retro-reflected as

12

ISSP Activity Report 2013

Fig. 2. (left) 400 nm × 400 nm ZBC color map taken on a confined areasurrounded by the Pb island and a step edge of the normal metal layer.
(right) Normalized negative ZBC profiles across the super/normal interface and the step edges measured along the colored lines drawn in the
topographic image. The length written for each plot is the terrace width
measured along the corresponding line.

basically no gap formation is observed at the edge of theisland that coincides with the downward step of the 2D layer.
The observed structural dependence can be explained by thevariation of the conductivity at the super/normal interface.
We also found that the surface steps severely block the
propagation, which indicate they behave as a strong potential
barrier or an elastic scatter for the two-dimensional electrons.
In order to find the role of the steps on the proximity effect,
we investigated an area where the step is very close to thesuper/normal interface shown in Fig. 2 (the upper left ofFig. 1). In the wedged area whose terrace width ranges fromalmost 0 to 2ξ we observed the enhancement of the gap
and found that deeper gap is formed on narrower terrace,
as demonstrated in the right panel of Fig. 2, which shows
ZBC profiles for various width terraces. Because of the realspace and cross-sectional observation, we can probe ZBC
throughout the system while eliminating unwanted effectsof structural defects at the super/normal interface and in thenormal metal. The observed enhancement is overall consistent with the reflectionless tunneling. The dependence of theenhancement on the terrace width is, however, not explained
quantitatively with the calculation based on the Usadel
equation, a quasi-classical Green's function formalization.
Some phenomena that are not considered in the calculation
are probably involved in the enhancement of the proximity
effect.
References[1] H. Kim, S.-Z. Lin, M. J. Graf, T. Kato, and Y. Hasegawa,
arXiv:1401.2602
AuthorsaaH.
Kim, S.-Z. Lin , M. J. Graf , T. Kato, and Y. HasegawaaLos Alamos National Laboratory

Ferromagnetic Josephson Junctions
Lippmaa Group
Ferromagnetism and superconductivity are generally
incompatible because in conventional superconductors
Cooper pairs are formed by two electrons with opposite
spins, while in ferromagnets, exchange interactions align thespins parallel to each other. In our recent work, we study thepossibility of a long-range supercurrent surviving in highly
spin-selective materials, such as half-metals in spin filter
tunnel junctions. In particular, our interest is in determining
the role of magnetic disorder in promoting a spin-triplet
supercurrent in a superconducting tunnel junction with aferromagnetic insulator barrier.
The tunnel junctions (Fig. 1a) were grown by pulsed
laser deposition and consisted of superconducting
La1.85Sr0.15CuO4 (LSCO) and Au/Nb/Au electrodes at thebottom and the top of the device. The gold layers were usedas oxygen diffusion barriers but were superconducting due
to the proximity effect. The tunnel barrier material was
Pr0.8Ca0.2Mn0.9Sc0.1O3 (PCMSO), which is a weakly ferromagnetic insulator. The PCMSO layer was doped with Ca
to obtain the ferromagnetic insulating phase, while partial
Mn substitution by Sc was used to tune the coercivity of thebarrier layer and to introduce intentional magnetic disorder.
An array of lithographically patterned junctions can be seenin Fig. 1b.
The tunnel junctions showed characteristic step-like

Fig. 1. (a) Schematic view of the La 1.85 Sr 0.15 CuO 4 (LSCO) /Pr0.8Ca0.2Mn0.9Sc0.1O3 (PCMSO) / Au / Nb / Au junction. (b) Imageof a patterned junction array. (c) Current-voltage characteristic of ajunction at 4.2 K.

current-voltage characteristics below 6.9 K (Fig. 1c), limitedby the superconducting transition temperature of the Au/
Nb top electrode. Differential conductance spectra of thejunctions showed three characteristic peaks that correspondto various quasi-particle tunneling maxima, as illustrated inFig. 2. The spectra measured at various temperatures yieldedthe expected gap values for LSCO (8 to 14 meV) and Au/Nb(1.25 meV) above 4.5 K. Below this temperature, an anomalous increase of the gap energies was observed. This gap
energy change was visible as an increase of the normalized
critical current, ICRN of the devices. Since the contributionof a direct leak between the s-wave Nb/Au top electrode andthe d-wave LSCO bottom electrode is unlikely, we consider
the possibility of scattering from magnetic disorder inducedin the PCMSO barrier by the Sc doping. Magnetic disorderat a c-axis-oriented cuprate superconductor and a ferromagnet may give rise to spin-triplet supercurrent, effectively
increasing the junction critical current.
The devices developed in this work allow us to probe
the role of magnetic disorder at superconductor – ferromagnet interfaces, since it is possible to adjust the disorderby suitable level of Sc doping in PCMSO, while the junction
characteristics can be probed as a function of an external
magnetic field. Our future interest is to discern if singlet

Fig. 2. (a) Differential tunneling spectra at various temperatures and (b)proposed band diagrams explaining the origins of the three peaks, A(top), B (middle), and C (bottom) in the tunneling spectra.

ISSP Activity Report 201313

pairs may be stabilized by local antiferromagnetism inthe barrier or if scattering into spin-triplet Cooper pairs
dominates.
Athors ab
T.
Harada , M. Matvejeff , R.Takahashi, and M. LippmaaaMax
PlanckInstitutefor
Solid State Researchb
Aalto University---Division of Physics in Extreme Conditions-----------

Possible Kondo Physics Near a
Metal-Insulator Crossover in the
A-site Ordered Perovskite CaCu3Ir4O12
Uwatoko GroupThe interplay between localized and itinerant electronsis at the heart of many intriguing phenomena such as theheavy-fermion behavior and the unconventional superconductivity associated with a magnetic quantum critical point[1]. The archetype systems for studying such interplay areconcentrated on the 4f/5f-based intermetallic compounds,
which can be effectively described as a Kondo latticeconsisting of a dense periodic array of f electrons interactingwith the conduction-band electrons [2]. Here, we reported
the realization of an analog d-electron Kondo lattice in anovel A-site-ordered perovskite CaCu3Ir4O12, which canbe synthesized only under high-pressure conditions, e.g. at
9 GPa and 1250 °C [3].
As shown in Fig. 1(b), the A-site-ordered perovskite

Fig. 1. (a) The Cu-O bond length in the coplanar CuO4 versus B-Obond length in the octahedral BO6 for A-site ordered perovskites
CaCu3B4O12; (b) The inverse magnetic susceptibility of several
CaCu3B4O12 perovskites; inset: schematic crystal structure of the A-siteordered perovskite.

14

ISSP Activity Report 2013

Fig. 2. Temperature dependence of (a) magnetic susceptibility χ(T) and
its inverse χ-1(T) measured under H = 1 T after zero-field cooling, (b)resistivity ρ(T) under H = 0 T, (c) thermopower S(T), and (d) specificheat C(T) under H = 0 and 9 T.
2+

CaCu3B4O12 can accommodate the Cu and the transition4+
metal B ions, respectively, in the square-planar CuO4 andoctahedral BO6 units, in which the d electrons can be coupled
2by strong covalent mixing with shared O ions. Depending
4+2+
on the B ions, the Cu 3d electrons can be tuned to beeither localized or itinerant. A plot of Cu-O versus B-O bond2+
length in Fig. 1(a) illustrated that the Cu 3d electronic
states in CaCu3Ir4O12 is located right at the itinerant-tolocalized boundary. In consistent with this observation, themagnetic susceptibility of CaCu3Ir4O12 shown in Fig. 1(b)demonstrated a crossover from the high-temperature CurieWeiss (CW) behavior to a low-temperature enhanced Pauliparamagnetism.
Figure 2 summarizes the physical properties of
CaCu3Ir4O12. The χ(T) measured at H = 1 T shows no signature of a magnetic ordering transition down to 1.8 K, but*a clear deviation from the CW law below T ≈ 80 K. The*
susceptibility anomaly below T is echoed in ρ(T), and also*
in the thermoelectric power S(T). Above T , ρ(T) follows a*perfect linear T-dependence; below T , ρ(T) exhibits a strong
downward trend with no sign of a curvature change down
to 0.5 K, strongly suggestive of non-Fermi-liquid behavior.
Significantly, S(T) also behaves anomalously, changing sign*
at T and remaining large as T approaches zero. The large
thermoelectric power at low temperatures signals strongly
energy-dependent quasiparticle properties. The absenceof a corresponding anomaly in the specific heat C(T) rules*out the possibility of a second-order phase transition at T .
Interestingly, C/T of CaCu3Ir4O12 exhibits a remarkableenhancement below ~ 20 K. The absence of a corresponding
enhancement in the closely related SrIrO3 perovskite, which
is a Pauli paramagnetic metal, indicates that this low-temper2+
ature anomaly must be associated with the Cu 3d electrons
or with interactions between Cu:3d and Ir:5d.
*
The presence of a characteristic temperature at T = 80

K is reminiscent of the low-temperature behavior in typicalheavy-Fermion materials, and is suggestive of Kondo-like2+
hybridization between primarily localized Cu 3d electrons*
and the itinerant Ir 5d electrons below T . In this picture,electrons on the two sublattices are weakly coupled above*
T . The initial reduction in χ(T) relative to the extrapolated*
T > T CW fit, may signal the onset of hybridization of Cu
4+electrons with the itinerant Ir 5d electrons. The quick*
drop of ρ(T) and the sign crossover of S(T) at T appear to
confirm the emergence of a hybridization between more
localized electrons on Cu and more itinerant electrons on Ir.
2+
The incorporation of the Cu 3d electrons into the itinerant
bands would not only enhance the density of states, but also
reduce the scattering from local magnetic moments. Further
evidence for the coherent incorporation of Cu local momentsin the Ir bands can be found in the specific-heat measurement, leading to a strong enhanced electronic specific-heat2
coefficient γ = 173 mJ/mol K for CaCu3Ir4O12. Our results
demonstrated that the A-site-ordered perovskites can host abroad spectrum of interesting phenomena that deserve further
explorations.
References[1] O. Stockert and F. Steglich, Annu. Res. Condens. Matter. Phys. 2,
79 (2011).
[2] Y.-F. Yang, and D. Pines, PNAS 109, E3060 (2012).
[3] J.-G. Cheng, J.-S. Zhou, Y.-F. Yang, H. D. Zhou, K. Matsubayashi,
Y. Uwatoko, A. MacDonald, and J. B. Goodenough, Phys. Rev. Lett.
111, 176403 (2013).
AuthorsaJ.-G. Cheng,
K. Matsubayashi,
Y. Uwatoko,
J.-S.c Zhou , A.
aab
MacDonald,
J.
B.
Goodenough
,
Y.-F.
Yang
,
H.
D.
Zhou
a
University of Texas at AustinbInstitute of Physics Chinese Academy of Sciencesc
University of Tennessee

Stability of Quantum Hall Ferromagnetic
Phase under High Magnetic Fields in the
Organic Dirac Fermion System
Osada Group
A layered organic conductor α-(BEDT-TTF)2I3 underhigh pressure (>1.5 GPa) is a multilayer Dirac fermion
system, in which 2D massless Dirac fermion layers stackwith weak interlayer coupling, and the Fermi level is fixed at
the Dirac point. Such an undoped 2D Dirac fermion systemshows the ν = 0 quantum Hall (QH) effect at sufficiently highFig. 2. High-field interlayer magnetoresistance of 2D organic Diracfermion system α-(BEDT-TTF)2I3. No sign of the QHF-QHI transition
was observed.

magnetic fields resulting from the spontaneous symmetry
breaking (SSB) of four-fold (spin and valley) degeneracy ofthe singular n = 0 Landau level. Generally, two kinds of theν = 0 QH state are possible in the Dirac systems (Fig. 1):
One is the QH ferromagnet (QHF) state with the metallic
helical edge state consisting of a pair of n = 0 QH chiral edge
states with opposite spin and chirality. The other is the QH
insulator (QHI) state with no edge state and some real-spacestructure. In this way, the high-field ground state is one of the
key issues of the physics of the Dirac fermion system.
In graphene, the typical 2D Dirac fermion system, thehigh-field ground state (the ν = 0 QH state) is believed to be
the QHI phase. In contrast, in α-(BEDT-TTF)2I3, the highfield ground state is considered to be the QHF phase. Itsinterlayer magnetoresistance shows anomalous saturation
at high fields. We illustrated that this saturation resistanceis scaled not by the sectional area of sample crystals but by
sample perimeter. This fact directly means that the metallic
surface transport is dominant in the saturating region, andit strongly suggests that the QHF phase with the metallic
helical edge state is realized. However, recently, Kanoda
et al. observed the fine structures of the NMR lineshape athigher fields (B > 15 T), which suggests the appearance ofsome real-space structure accompanied by the QHI. Theirresult shows the possibility of transition from the QHF to the
QHI in higher field region.
To confirm this possibility experimentally, we performed
high-field transport measurement up to 31 T using the
National High Magnetic Field Laboratory at Tallahassee,
USA. Since no surface transport exists in the QHI phase,
rapid increase of the interlayer resistance can be expected at
the QHF-QHI transition. As shown in Fig. 2, the interlayer
resistance shows increase reflecting the activated bulk transport at low fields, and it switches to weak increase at higher
fields up to 31 T. This saturation is caused by the surface
transport via helical edge state. We can see no anomaly in thesaturating region, especially around 15 T. This result meansthat the QHF state survives up to 31 T with no QHF-QHI
transition suggested by the NMR study.
The pure QHF phase is spatially uniform state. To
explain the NMR result, it might be necessary to consider the
mixture of spin and valley degree of freedom.
Authors
T. Osada, M. Sato, T. Konoike, and K. Uchida

Fig. 1. Schematic energy dispersion of QH edge states in the QHF (left)
and QHI (right) states. If the valley splitting becomes larger than thespin splitting in high magnetic fields, the QHF-QHI transition mightoccur. The helical edge channel (indicated by a circle) in the QHF
phase disappears at the QHI phase.

ISSP Activity Report 201315

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

Parallelizable Multi-Worm Algorithm
Kawashima Group
Massively parallel computations open the door to manyotherwise intractable problems in condensed matter physics,
in particular, quantum many-body problems. Recent highperformance computers, symbolized by K-computer in Kobe,
rely on a large number, as many as a million, of processors(or more precisely "cores"). Therefore, we must split thecomputational tasks into many bits and assigning each toone of the numerous processors. This is by no means a trivial
thing to do. Often we must significantly alter algorithms tosplit the task in an efficient way. In other words, we must
develop new parallelizable algorithms. The quantum Monte
Carlo method with the worm update algorithm [1, 2] has abroad range of applicability and is one of the standard tools
to treat quantum many-body problems. However, in thisalgorithm, update of configurations is realized via the motionof a single-point object in the whole space-time (or thelattice), making it hard to split the task.
Based on the directed-loop algorithm [2], one of thevariants of the worm algorithm, we proposed a parallelizable
worm algorithm, which we named the parallelizable multiworm algorithm (PMWA). In PMWA, multiple worms are
introduced by an artificial source field η and the space-timeis decomposed into many domains, as illustrated in Fig. 1.
Each domain is assined to a processor and typically contains
10-100 worms. We estimate physical observables by extrapolation to the η = 0 imit. Introducing multiple worms requires
a different procedure from the conventional worm algorithm
so as to satisfy the detailed balance condition. The migration of the worms over the domain boundaries is effectively
realized through communications between domains so thatthe ergodicity condition is satisfied. The PMWA is applicableto the soft-core Bosons and the quantum spins as the conventional worm algorithm.
We applied the PMWA to the extended Hard-core BoseHubbard model on square lattice defined by
H = -t bi+bj + V ninj - μ ni -η (bi++ bi)

Σ
(ij)

Σ
(ij)

Σi

Σi

where bi is the annihilation operator at site i, t is the hopping
energy, V is the nearest neighbor repulsion, and μ is thechemical potential. We established the extrapolation procedure to obtain physical quantities in the η = 0 limit. Then,
we confirmed that the extrapolated PMWA result agreed
with the result obtained by the conventional DLA algorithm.
Figure 2(a) shows the order parameter of the Bose-Einstein

Fig. 2. (a) The order parameter of the Bose-Einstein condensate as afunction of η;. (b) The standard error as a function of the number ofdomains with the fixed number of Monte Carlo steps. (c) The standard
error as a function of the number of domains with the computationaltime (wall-clock time) being fixed.

condensate Q ≡ 〈b〉 as a function of η. Here we carried out
simulations of the size of L × L × β = 10,240×10,240×16
using 3,200 processing cores, where L is the system's linear
dimension and β is the inverse temperature. This size exceeds
the maximum reachable size of the conventional worm
algorithm. To evaluate the parallelization efficiency of thealgorithm, we measured the standard error as a function of
the number of domains N. We found a very weak N-dependence for the relaxation time in the simulation with fixed
number of the Monte Carlo steps (Fig. 2(b)). In addition,in comparison with the conventional DLA results, PMWA
results show better accuracy in fixed wall-clock time with
N>8 (Fig. 2(c)), and the difference increases as the system
becomes larger.
References[1] N. Prokof'ev, B. Svistunov, and I. Tupitsyn, Sov. Phys. JETP 87,
310 (1998) etc.
[2] O. F. Syljuasen and A. W. Sandvik, Phys. Rev. E 66, 046701 (2012).
[3] A. Masaki-Kato, T. Suzuki, K. Harada, S. Todo, and N. Kawashima,
arXiv:1307.0328 (2013), to be published in Phys. Rev. Lett. (2014).
Authorsab
A.
Masaki-Kato, T. Suzuki , K. Harada , S. Todo, and N. Kawashimaa
University
of
Hyogo
b
Kyoto University---Neutron Science Laboratory-----------------

Dynamic Light Scattering Microscope:
Accessing Opaque Samples
with High Spatial Resolution
Shibayama Group

Fig. 1. Worms and worldlines in PMWA. The yellow dashed lines are
the domain boundaries.

16

ISSP Activity Report 2013

Dynamic light scattering (DLS) is a technique forobtaining the size distribution of particles in solution.
However, it cannot be applied to opaque samples. There
are two types of opaque samples. One is a black sample,
which is a strong light-absorbing material such as ink. In thiscase, scattered light is completely absorbed by the sample
itself and one cannot obtain the signal. The other type ismilky samples, which are strong light-scattering materials
such as milk. In this case, multiple scattering is inevitable.
In addition to this, poor spatial resolution sometimes also
becomes a problem. There is a growing demand to investi-ered not to aggregate. One of the possible explanations forour result is the existence of attractive interactions between
colloidal particles. In other words, colloidal particles show
collective motion rather than Brownian motion at higher
concentrations. This consideration is supported by the factthat the viscosity of neat ink is approximately five times
higher than that of water. Taking advantage of its high spatial
resolution, this technique can also be readily applied to othermedia such as biological cells and gels.
References[1] T. Hiroi and M. Shibayama, Opt. Express. 21, 20260 (2013).
[2] P. Navabpour et al., Colloid Polym. Sci. 283, 1025 (2005).
Authors
T. Hiroi and M. Shibayama
Fig. 1. Photograph of the dynamic light scattering microscope.

gate the dynamic behavior of samples with a higher spatial
resolution. One such example is a tracking of material transportation in biological cells. To realize such applications,the spatial resolution needs to be near the diffraction limit.
Here, we propose a new DLS technique, “DLS microscope”
that mitigates the above-mentioned disadvantages (Fig. 1)[1]. The proposed DLS microscope obtains signals with abackscattering geometry. This enables us to measure opaquesamples with high spatial resolution.
By using the DLS microscope, we measured the size
distribution of opaque samples such as polystyrene latex andChinese ink with changing their concentrations. Figure 2
shows the results for the polystyrene latex suspension andChinese ink. In the case of polystyrene latex suspension, thedata show the monodisperse nature. The calculated diametershows good agreement with the nominal diameter (100 nm).
Since the result for the polystyrene latex suspension shows
peaks at almost the same position in all concentrations, we
can conclude that the polystyrene latex suspension shows
no morphology change through varying the concentration.
This is consistent with the following molecular interpretation: each particle has a negative charge on the surface, andthe particles repel each other keeping their form unchanged
and showing Brownian motion. This result corresponds to
the result obtained by using diffusing wave spectroscopy [2].
In contrast, the result for Chinese ink seems to show thatthe average particle size increases and the size distribution
broadens at higher concentrations. However, as Chinese ink
is a protective colloidal solution, the particles are consid-

Fig. 2. (Left side) Concentration dependence of the size distribution ofa polystyrene latex suspension. The nominal diameter of the polystyrene latex particles is 100 nm. The 1 - 0.01 wt%, as measured by the
DLS microscope, is represented by the solid lines. The 0.01 - 0.0001
wt%, as measured by the typical DLS system, is represented by thedashed lines. (Right side) Concentration dependence of the size distribution of Chinese ink. The 10 - 0.05 wt%, as measured by the DLS
microscope, is represented by the solid lines. The 0.05 - 0.001 wt%,
as measured by the typical DLS system, is represented by the dashedlines.

Magnetic Relaxation in a
Tb-based Single Molecule Magnet
Yamamuro GroupA single-molecule magnet (SMM) is a metal complex
that behaves as an individual nanomagnet. Each molecule,containing several metal centers with unpaired electrons,possesses a giant resultant spin. Given that the giant spin
exhibits easy-axis anisotropy (D < 0), the magnetization reversal between the ground states with Sz = +/-S is2hindered by the potential barrier of DSz . The traditional
research subjects have been SMMs containing multiple
transition metal atoms such as Mn, Fe, and Ni, while thecurrent mainstream is shifting to lanthanide SMMs. Owing
to a large contribution of angular momentum, lanthanide
complexes can become SMMs containing only one or twomagnetic ions. One of the central issues in lanthanide SMMs
is the quantum tunneling mechanism for the magnetization reversal. In most cases, the tunneling occurs between
ground states (pure tunneling process) and/or excited states(thermally assisted tunneling process). The origins of thetunneling have not been fully understood yet.
We have investigated the spin dynamics of Tb-Cu
dinuclear SMM by means of neutron scattering techniques.
The chemical formula of the sample is TbCuC19D20N3O16
and its molecular structure is schematically shown in theFig. 1. Dynamic structure factors of TbCu-SMM. The data at 3.5 K
represent the resolution function. The other data are fitted to the combination of delta and Lorentz functions. The inset shows the molecular
structure of TbCu-SMM.

ISSP Activity Report 201317

momentum of the Tb ion, Jz (see Fig. 2(a)), assuming thespin Hamiltonian including ligand field anisotropy, exchange
3+2+interaction between Tb and Cu , and hyperfine interaction. The excitation of 1.7 meV is the transition between the
ground and the first excited states. We thus conclude that themagnetization reversal occurs through quantum tunnelingbetween the pairs of degenerated excited states at 1.7 meV.
This is called thermally activated tunneling process, in otherwords the Orbach mechanism of spin-lattice relaxation. On
the other hand, the relaxation 2 detected by QENS has quite-12
different Ea and τ0; Ea(2) = 174 K and τ0(2) = 1.5 × 10 s.
The relaxation 2 is also of the Debye type and gets activatedupon heating according to the Arrhenius law. The simplest
scenario for the origin of the relaxation 2 is that the relaxation 2 takes place through the tunneling between higher
excited states. The activation energy of 174 K (= 15 meV)roughly corresponds to the higher energy level as seen in theenergy diagram in Fig. 2(a).
This is the first successful QENS work to observe
magnetic relaxation in SMM. The use of QENS can open
a new window into the study of relaxation processes in theclass of SMMs.

Fig. 2. (a) Calculated energy diagram as a function of z-component of
the total angular momentum of Tb ion. Dashed lines represent possible
relaxation processes. (b) Arrhenius plot of the relaxation times observedon the five spectrometers. The results from the ac susceptibility
measurements are also shown.

inset of Fig.1. In order to reduce the contribution fromthe strong incoherent scattering of H atoms, the sample
3+
was fully deuterated. Only two magnetic ions, Tb (J = 6)
2+
and Cu (S = 1/2), are involved in a molecule. Following
inelastic neutron scattering studies to determine the energy
scheme [1], we investigated the magnetic relaxation bymeans of quasielastic neutron scattering (QENS) experiments using various spectrometers with different energy
resolutions; AGNES (∆E = 49 µeV) at JRR-3, AMATERAS(∆E = 120 µeV) at J-PARC, TOFTOF (∆E = 8 µeV) at FRM
II (Germany), HFBS (∆E = 0.8 µeV) and neutron spin-echo
NSE (Fourier time, 0.007 < t < 12 ns) at NCNR (USA) [2].
The use of five spectrometers enables us to investigate relaxations over a wide time range between 1 ps and 100 ns.
Figure 1 shows the dynamic structure factors of Tb-Cu-1
SMM at Q = 0.5Å taken on the TOFTOF spectrometer.
Clearly, QENS broadening was observed above 30 K. The
QENS spectra were well fitted to the combination of deltaand Lorentz functions. The linewidth of the Lorentzian,
Γ(Q), exhibits no pronounced Q-dependence, indicating thatthe relaxation is of a local origin. The relaxation times wereobtained from the relation τ = 1/Γ. In Fig. 2(b), we show
the Arrhenius plot of relaxation times estimated from the
QENS together with those from the ac magnetic susceptibility measurements. This provides a clear evidence of theexistence of two distinct relaxation processes. We designate
the slower relaxation as the relaxation 1 and the faster one
as relaxation 2. Both relaxation processes follow the Arrhenius relation τ = τ0exp(∆Ea/kBT). As for the relaxation 1,
the activation energy Ea and prefactor τ0 are estimated to be-8
16.0 K and 4.1 × 10 s, respectively. It should be emphasized that Ea corresponds to the excitation energy of 1.7 meV
observed in the INS study [1]. We have calculated an energy
diagram as a function of the z-component of the total angular

18

ISSP Activity Report 2013

References[1] M. Kofu, O. Yamamuro, T. Kajiwara, Y. Yoshimura, M. Nakano,
K. Nakajima, S. Ohira-Kawamura, T. Kikuchi, and Y. Inamura, Phys.
Rev. B 88, 064405 (2013).
[2] M. Kofu, T. Kajiwara, J. S. Gardner, G. G. Simeoni, M. Tyagi,
A. Faraone, K. Nakajima, S. Ohira-Kawamura, M. Nakano, andO. Yamamuro, Chem. Phys. 427, 147 (2013).
Authorsab
M.
Kofu, T. Kajiwara , G. G. Simeoni , and O. YamamuroaNara
Wemen’s
UniversitybTechnical University of Munich

Nano-magnetism in
Relaxor Magnet LuFeCoO4
Masuda Group
Dielectric property exhibiting an enhanced permittivity
in wide temperature range is known as relaxor ferroelectricity and it has attracted great interest in the field of basic
and applied physics. In the relaxor system Polar Nanoregions (PNRs), where coherent polarizations in nano-scaledomains are randomly oriented in the bulk crystal, play
important role. So far disordered perovskite oxides suchas Pb(Mg1/3Nb2/3)O3, Pb(Sc1/2Ta1/2)O3, etc., have been
extensively studied [1] and all of them are purely dielectric and non-magnetic. Here natural question arises: what
would happen if the relaxor system contains magnetic ions?
One of our group members answered to the question in his
pioneering work on a relaxor magnet, 2/3BiFeO3-1/3BaTiO3[2]; appearance of a new type of nano-magnetism where
superparamagnetic moments are induced limitedly inside
the PNRs. For further understanding of relaxor magnets
we study a new compound LuFeCoO4 by combinationof bulk properties measurements and neutron diffraction
technique. Our study reveals the relationship between PNRs
and magnetic correlation, and establishes the magnetic anddielectric phase diagrams of the relaxor magnet as shown in
Fig. 1(a) [3].
LuFeCoO4 is a two-dimensional (2D) triangular spin

---International MegaGauss Science Laboratory------

3D Liner Imploding Process in theElectro-Magnetic Flux Compression
Takeyama Group

Fig. 1. (a) Magnetic phase diagram (upper panel) and dielectric phase
diagram (lower panel). PM, SM, NR, ER, and PE mean paramagnetism,superparamagnetism, nonergodic relaxor, ergodic relaxor, and paraelectric, respectively. (b)-(g) The relationship between PNR and magnetic
correlation at various temperatures. White arrows are electric polarization and yellow arrow are weak-ferromagnetic moments. (h) Temperature dependence of magnetic and nuclear diffuse intensities. (i) The
temperature dependencies of magnetic and nuclear correlations.
3+2+system where Fe and Co ions are randomly positioned on
the vertices of the triangles. Temperature dependence of thepermittivity constant showed a typical behavior of a conventional relaxor. The result suggested the existence of PNRs
and it is supported by neutron diffuse scattering. Magnetic
susceptibility showed a weak-ferromagnetic component
and magnetization showed superparamagnetic behavior
at T < 190 K. With further decreasing the temperature thesusceptibility showed a well-defined anomaly at 70 K andthe magnetization showed hysteretic behavior at the basetemperature, indicating a realization of magnetic order with aweak-ferromagnetic component.
The nuclear scattering results at T > 190 K in Fig. 1(h)show typical behavior of relaxor systems. At 190 K < T <275 K, the PNRs are freezed and static. With decreasing thetemperature at T = 190 K the nuclear diffuse intensity begins
to decrease and simultaneously the magnetic peak appears.
These results mean that the size of the PNRs increases and,synchronizedly, magnetic correlation develops. The magnetic
correlation length at 190 K is 7 nm and it is the same as thatof nuclear scattering as shown in Fig. 1(i).
Based on the bulk property measurements and neutron
diffraction experiments, we propose a superparamagnetic
model that a weak ferromagnetic correlation is, in thetemperature range of 190 K < T, developed in the crystallographic c plane inside the PNRs as schematized in Fig. 1(d).
Outside the PNRs the nuclear correlation is incoherent andso is the magnetic correlation. Spin moments in the PNRs
behave as superparamagnetic moments and those outside the
PNRs do as conventional paramagnetic spins. At the temperature TMD ~ 190 K the magnetic correlation achieves longranged inside the PNRs. With decreasing the temperature thedomain size of PNR increases and consequently the accompanied magnetic domain increases as described in Fig. 1(c).
At the TN' = 70 K a magnetic correlation in 2D and dielectric correlation in 3D are both in quasi-long-range order as
schematized in Fig. 1(b). Meanwhile at T ≥ TMD the magnetic
order is absent as shown in Figs. 1(e)-(g). The proposedmodel consistently explains both bulk properties and neutron
scattering results.
References[1] A.A. Bokov and Z.-G. Ye, J. Mater. Sci. 41, 31 (2006).
[2] M. Soda et al., J. Phys. Soc. Jpn. 80, 043705 (2011).
[3] M. Soda et al., submitted to Phys Rev. B.

The electromagnetic flux compression (EMFC) techniquein ISSP has been established to generate magnetic fields up
to 730 T [1], which is the world strongest magnetic field in
an indoor experiment. There, a metallic cylinder called the“liner” is subjected to the inductive electromagnetic force
from a primary coil, and the initial magnetic field (~4 T) is
compressed by an imploding liner within a few microseconds
before the magnet destruction. Owing to the high reproducibility in its operation of the EMFC technique, solid-statephysics experiments are nowadays available in ultra-highmagnetic fields of up to 700 T at room temperature and up to
600 T at temperatures as low as 5 K. For solid-state physics
experiments performed under ultra-high magnetic fields,
the particularly important issues are (a) high precision of
the magnetic field intensity, (b) the spatial uniformity of themagnetic field, and (c) appropriate bore at a peak magnetic
field. For issue (a), the magnetic field intensity was recently
verified to have a precision of 3 % up to 500 T, by calibratingwith the Faraday rotation measurement on optical glasses[2]. For issues (b) and (c), detailed knowledge of dynamicalmagnetic-flux compression processes is required, for which
computer simulation can be a powerful tool. Thus, we clarified the relationship between the liner’s imploding process
and the spatiotemporal distribution of the magnetic field
intensity, by comparing with the simulation [3].
In Fig. 1(a), the solid curve is the magnetic field intensity
curve (hereafter termed as the B-t curve) at z = 0. We adopted
the liner of 50 mm length (Llin, illustrated in the inset) and of
1.5 mm thickness. A multi-probe with an eight pick-up coils
were set along the magnetic field axis (defined as the z-axis)
at the center of the imploding liner, and the spatial distribution of the magnetic field intensity was simultaneously
measured in a single shot The magnetic field’s profile in thez direction, B(z), was shown in Fig. 1(b). The field homogeneity was thus successfully determined for the first time in
the EMFC experiment. Up to 500 T, the field homogeneity
was estimated as good as the measurement error (~3 %) atz = ±1 mm, which has proven to be sufficiently good for thegeneral solid-state physics measurements.

Fig. 1. (a) Magnetic field curves of the experiment (the solid curve, Llin
= 50 mm) and the simulation (the dashed curve, Llin = 35 mm). The
inset illustrates the liner’s shape. For t = 0 μs, we show the liner used in
the experiment (Llin = 50 mm). For t = 37 μs, the simulated imploding
liner in case of Llin = 35 mm deforms into a barrel-like shape. The color
map indicates the secondary current intensity, Is, induced in the liner.
(b) Spatial profiles of magnetic field intensity along the magnetic fieldaxis at each time, which corresponds with the open symbols in (a). The
solid-curves are the fitting of two Gaussian functions for the experimental data, and the dashed curves are the simulated spatial profiles incase of Llin = 35 mm.

ISSP Activity Report 201319

Two-hump structure of B(z) in Fig. 1(b) is hardly
explained by the mesh modeling of liner’s dynamics developed by Miura and Nakao [4]. In Ref. 4, the liner’s thickness
was assumed to keep uniform along the z direction during
the implosion. However, their model is far from accuracy indescribing the real situation and is oversimplified. Therefore,
we revised the simulation by independently calculating the
dynamics of the liner mesh with its respective z coordinate,
which allows us to obtain a nonuniform liner deformation.
The dashed curves in Figs. 1(a) and 1(b) are the simulation result in case of Llin = 35 mm. The length of the primarycoil (Lpri) is set to be 45 mm. The simulated liner’s shape at
37 μs is illustrated in the inset of Fig. 1(a), and the color map
indicates the secondary current intensity, Is, induced in theliner. The barrel-like deformation of liner’s inner wall shownin Fig. 1(a) induces the two hump structure of B(z) in Fig.
1(b). Note that the liner’s barrel-like deformation only takes
place when Llin < Lpri, whereas Llin (50 mm) > Lpri (45 mm)
at t = 0 μs in the real experiment. This fact implies a threedimensional implosion process associated with a compression of the liner along the z-axis. The present work has
pointed out that a three-dimensional analysis of an imploding
liner is of particular importance for further record-breaking
higher magnetic field in the EMFC, and for an increased
controllability as well as a higher precision in the solid-statephysics measurements.
References[1] S. Takeyama and E. Kojima, J. Phys. D: Appl. Phys. 44, 425003(2011).
[2] D. Nakamura et al., Rev. Sci. Instrum. 84, 044702 (2013).
[3] D. Nakamura, H. Sawabe and S. Takeyama, Rev. Sci. Instrum. 85,
036102 (2014).
[4] N. Miura and K. Nakao, Jpn. J. Appl. Phys. 29, 1580 (1990).
Authors
D. Nakamura and S. Takeyama

Heat Pulse Measurements of Specific Heat
in Pulsed Magnetic Fields
Kindo Group
Measurements of the specific heat (Cp) in magnetic fields
have been widely used to investigate fundamental propertiesof a material. Although several attempts to provide specificheat data at high magnetic field have been made, experimentsin pulsed magnets are subject to strong constrains that arise
from the short timescale of the measurements. Therefore,
calorimetric studies have all been limited to the magnetic
field range accessible to continuous magnets (dc magnets),with very few exceptions of pulsed magnets having an
unusually long (>250 ms) pulse field duration [1,2]. In thiscontext, we have developed, for the first time, a calorimeterthat can operate in short pulse duration of less than 50 ms[3].
We attempt to obtain a quick thermal response by
reducing the physical size of the calorimeter. Our calorimeterconsists of a Au16Ge84 thin-film thermometer, a Ni50Cr50
thin-film heater, 100 μm diameter Constantan relaxation
wires, and a quartz thermal bath. The eliminations of a bulk
thermometer and a bulk heater lead to a quick monitoringof the temperature and enable us to study thermodynamic
properties, such as Cp and magnetocaloric effect (MCE), in

20

ISSP Activity Report 2013

Fig. 1. Time dependence of the temperature (black dots), the power ofthe heat pulse (red), and the field profile (blue) during the 36 ms pulsed
magnetic field. Gray curve represents a fit obtained with a simple heat
equation.

the 36 ms pulsed magnet that is commonly used to reachfields above 50 T. As a test of our thin-film based calorimeter, we have measured the Cp of slab-shaped Cu3Mo2O9
single crystalline samples (0.10 mg (sample 1) and 0.0285
mg (sample 2)) between 3 and 20 K in pulsed magnetic fields
up to ~56 T.
Figure 1 shows the time dependence of sample temperature (black curve) during a specific heat measurement in thepresence of 56 T pulsed magnetic fields. During the application of square heat pulse (red curve), the sample temperature
linearly increased, and immediately after the heat pulse aclear step in temperature was observed. The short time scaleof measurement (~0.5 ms) significantly reduces the uncertainty in magnetic field (blue curve); 0.2% of the appliedfield (56.0 ± 0.1 T) for observing a single temperature step.
Since the step-like temperature change is the ideal situation
for the heat pulse calorimetry, the change of the temperature(ΔT) can be estimated by the linear extrapolation (green
lines in Fig. 1(a)), and the ΔQ is obtained by integrating theP(t) curve. The molar specific heat was calculated by Cp =-1 -1
ΔQΔT m M, where m and M are the sample mass and themolar weight, respectively, and its temperature dependence
was plotted in Fig. 2.
Figure 2 shows the Cp(T) of sample 1 (black dots) andsample 2 (blue crosses) in various magnetic fields are shown
together with PPMS data measured at 0, 7 and 13 T. Cp(T)Fig. 2. A comparison of the specific heat data from the heat-pulse
calorimeter (sample 1; black squares and sample 2; blue crosses)with those from the PPMS (red curves) near the phase transition in
Cu3Mo2O9. Arrows indicates the peak temperature in specific heat.

show λ-type pronounced peak and its peak temperature andthe size of the anomaly varies as the applied magnetic fieldchanges. Although the point-to-point scatter obtained fromthe present set-up is more than that of PPMS (red curve),
the over-all temperature dependence of Cp, including thepeak shape and its absolute value, agree well with the datameasured in PPMS. We estimate that the absolute accuracyof the measurement is better than ±10% for temperature
range from 3 to 20 K. The quantitative agreement between
two sets of data shows that the experiment we are doing inpulsed field is the same as the experiments we have been
doing in dc fields. The resultant Cp(T) data can be analyzed
in the conventional way to determine the entropy, specificheat exponent, and possibly the order of the phase transition.
We have developed an effective calorimeter for use in apulsed magnetic field up to ~56 T and tested their performance with Cu3Mo2O9 single crystalline samples. For
Cu3Mo2O9, this system exhibits an overall accuracy of better
than ±10% for entire temperatures range of 3 to 20 K. This
technique is now open to users of International Megagauss
Science Laboratory.
References[1] M. Jaime et al., Nature 405, 160 (2000).
[2] Y. Kohama, C. Marcenat, T. Klein, and M. Jaime, Rev. Sci. Instrum.
81, 104902 (2010).
[3] Y. Kohama, Y. Hashimoto, S. Katsumoto, M. Tokunaga, andK. Kindo, Meas. Sci. Technol. 24, 11505 (2013). (IOP select)
Authors
Y. Kohama, Y. Hashimoto, S. Katsumoto, M. Tokunaga, and K. Kindo

Electronic Phase Transitions of Graphite
in the Quasi-Quantum Limit State
Tokunaga and Kindo Groups
The quantum limit state, where all carriers populate thelowest Landau level, exhibits various anomalous phenomena
because of the strong correlation acting on the carriers
confined by magnetic fields. This state can be realized only
in extremely high magnetic fields, the order of 104 T, in
ordinary metals.
Graphite is a semimetal having a small number of18-3electrons and holes ( ~ 3 × 10 cm for each) and goes
into the quasi-quantum limit state, where only the lowest
electron-like (Landau index n = 0, spin↑and↓) and holelike (n = −1, ↑and↓) subbands are populated in magnetic
fields above 7.4 T applied along the c-axis. With further
increasing the field, emergence and collapse of a density
wave state has been claimed through measurements ofin-plane (ρ xx) and out-of-plane (ρ zz) resistivity [1]. In
addition, recent magnetoresistance measurements up to 80 T
suggested emergence and collapse of another density wave
state at 53 T and 75 T, respectively [2]. The actual nesting
vector in these density wave states and also the underlying
structure of the subbands, however, remain unclear as yet
because of the limited experimental technique available
above 25 T.
We studied Hall resistivity (ρxy) and magnetization ofgraphite single crystals in pulsed high magnetic fields [3]. As
the main feature of the results, the ρxy becomes almost zeroas the field approaches 53 T, where ρxx and ρzz show anoma-

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

lies as shown in Fig. 1. In the microscopic point of view, theHall resistance is given by summation of the matrix elementsof the current operator between the states having different
Landau indices ∆n = 1 and, hence, sensitive to the wholedispersion curves of the relevant subbands. The almost zeroHall resistance seems consistent with the existence of two
populated subbands (n = 0↓ and n = −1↑) [1] rather than theless-symmetric three subband model (n = 0↑ , n = 0↓ andn = −1↑) [2]. Thereby, the quantum limit state likely
emerges above 53 T. In this quantum limit state, density
wave can be formed by the nesting between the Fermi pointsof the n = 0↓ and n = −1↑ subbands, which is equivalent
to the BCS-like pairing state of excitons. Further studies areneeded to clarify the nature of the additional phase transitionat 75 T in this quantum limit state.
References[1] H. Yaguchi and J. Singleton, J. Phys.: Condens. Matter 21, 344207(2009).
[2] B. Fauqué et al., Phys. Rev. Lett. 110, 266601 (2013).
[3] K. Akiba et al., submitted to J. Phys. Soc. Jpn.
Authorsa
K. Akiba, A. Miyake, H. Yaguchi , A. Matsuo, K. Kindo, andM.
TokunagaaTokyo University of Science---Laser and Synchrotron Research Center/
Synchrotron Radiation Laboratory-----------

Ultrafast Photo-Induced Transitionof an Insulating VO2 Thin Film
into a Non-Rutile Metallic State
Shin Group

Vanadium dioxide (VO2) is an exemplary strongly correlated material known for its dramatic insulator-to-metaltransition around room temperature (Fig. 1(a)). The phasetransition can also be triggered by external stimuli such as
electric gating and light irradiation. VO2 thus provides aninteresting platform for novel functionalities. By using time-

ISSP Activity Report 201321

Development of the Polarization Control
Segmented Cross Undulator
at SPring-8 BL07LSU
I. Matsuda, Harada, and Shin Groups

Fig. 1. Insulator-to-metal transition of VO2. (a) Structural change frommonoclinic insulating phase to rutile metal phase upon the thermaltransition.
(b) Time-resolve spectrum at delay = 0.95 ps (F ~ 9 mJ/
2
cm , 270 K) compared with a static photoemission spectrum of a rutile
metallic state recorded at 350 K. (c) Time evolution of spectral weightover [-0.2, 0.2 eV]. The inset shows the unoccupied side of the spectra
for delay = 0.95, 4.05, 9.07 ps in the logarithmic scale.

resolved photoemission spectroscopy (TrPES) implemented
by a high-harmonic generation method, we investigated
the ultrafast photo-induced transition of VO2, and provide
insights into the non-equilibrium dynamics governed bystrong correlations.
The valence-band spectrum of a VO2 thin film wasmonitored in a pump-and-probe TrPES configuration. A
metallic state emerged when the sample was impinged
by a 170-fs pulse above a critical fluence F = 6 mJ/cm2,
which was directly evidenced by the ultrafast increase of
the spectral weight at the Fermi level (EF). The transition
was accompanied by a spectral-weight transfer on a 1-eV
scale characteristic of strong electron correlations. The
photo-induced metallic state exhibited a unique spectrum
that tails up to ~0.4 eV above EF. This indicates that the
emergent metallic state is different from the rutile state (Fig.
1(b)). After the impulsive impact, the spectral weight at EF
further increased until ~3 ps (Fig. 1(c), inset), indicatingthat the metallic state grew proliferatively. The ~0.4-eV tailalso persisted for > 3 ps, the behavior of which cannot be
explained by the photo-response of typical Mott insulatorsthat relaxes within ~1 ps. These observations emphasize
the importance of non-electronic degrees of freedom in thephoto-induced dynamics of VO2.

Synchrotron-based soft X-ray spectroscopy has provento be a powerful experimental technique for studying theatomic, molecular and electronic structures of materials.
The energy range of soft X-rays covers the K-edge absorption of the most abundant elements on Earth (e.g. C, N, O,
Si) and the L-edge absorption of the industrially importanttransition metals (Ti, V, Cr, Mn, Fe, Co, Ni, Cu and Zn).
Soft X-ray spectroscopy has many unique characteristics,
such as element specificity, chemical specificity and surface
sensitivity. Furthermore, responses of a matter with different
light polarization determine orbitals of the electronic states
in solids, configurations of molecules on a surface, and spin/
orbital magnetic moments of magnetic atoms. These properties make them versatile for application in a wide range ofscientific fields including surface chemistry, environmental
science and magnetism. Therefore, developments of polarization control soft X-ray sources have been one of the significant issues in condensed matter physics.
Recently, we have constructed a new soft X-ray
beamline, BL07LSU, at SPring-8 to perform advanced
soft X-ray spectroscopy for materials science. To realize
the state-of-the-art performance, a novel segmented crossundulator (SCU) was developed and adopted as a soft X-ray
light source. Figure 1 shows schematic drawing and photograph of the SCU. It consists of eight undulator segments
and seven phase shifters (PS), and its total length is 27 m.
Four segments generate horizontally linearly polarized radiation at the fundamental radiation (Figure-8 undulator), andthe other four segments generate vertically linearly polarizedradiation (Figure-∞ undulator). The horizontal and verticalundulator segments are placed alternately. Circular or tilted
linearly polarized light can be obtained by superposing
horizontally and vertically linearly polarized radiation, andthe helicity of the circularly polarized radiation, for example,
can be changed by the PSs. The PSs adjust the relative
phase of the undulator radiation emitted from each segment
by changing the path length of the electron orbit between
segments with a local orbit bump. Linear polarization, PL,and circular polarization, PC, are evaluated by the rotating
analyzer ellipsometry using the multilayer mirrors. The
degrees of linear polarization (PL) from four horizontal orfour vertical segments are both 1.00. The degree of circularpolarization (PC) from four horizontal and four vertical

Reference[1] R. Yoshida, T. Yamamoto, Y. Ishida, H. Nagao, T. Otsuka, K. Saeki,
Y. Muraoka, R. Eguchi, K. Ishizaka, T. Kiss, S. Watanabe, T. Kanai,J. Itatani, and S. Shin, Phys. Rev. B 89, 205114 (2014).
Authorsaaa
R. Yoshida, aT. Yamamoto,
Y. Ishida, H. Nagao , T. Otsuka , K. Saeki ,aY. Muraoka , R. Eguchi , K. Ishizaka, T. Kiss, S. Watanabe, T. Kanai,J.
Itatani, and S. Shina
Okayama University

22

ISSP Activity Report 2013

Fig. 1. Schematic and photograph of a novel segmented cross undulator
at SPring-8 BL07LSU that generates polarization controlled soft X-ray.

segments are - 0.94 and 0.93 for left- and right-handed circularly polarized light, respectively.
The degree of polarization at SPring-8 BL07LSU is highenough to perform various soft X-ray spectroscopy using
light polarization, such near-edge X-ray fine structure, X-ray
magnetic circular dichroism, X-ray magneto-optical Kerr
effect, and resonant soft X-ray diffraction. Moreover, thebeamline optics and the experimental stations allow users tocarry out the experiments also at small region (70 nm), withtime resolutions (50 ps), and with high energy resolution (>10,000).
Reference[1] S. Yamamoto, Y. Senba, T. Tanaka, H. Ohashi, T. Hirono,
H. Kimura, M. Fujisawa, J. Miyawaki, A. Harasawa, T. Seike,S. Takahashi, N. Nariyama, T. Matsushita, M. Takeuchi, T. Ohata,
Y. Furukawa, K. Takeshita, S. Goto, Y. Harada, S. Shin, H. Kitamura,
A. Kakizaki, M. Oshima, and I. Matsuda, Journal of Synchrotron
Radiation 21, 352 (2014).
Authors
I. Matsuda, S. Yamamoto, Y. Harada, and S. Shin

Discovery of a Giant Kerr Rotation in a
Ferromagnetic Transition Metal by M-edge
Resonant Magneto-Optic Kerr Effect
I. Matsuda and Shin Groups
Magneto-optical effects are one of the central topics
in condensed matter physics. The effects have been used
to study magnetism and spin transport in materials. Manyexperiments with the magneto-optical Kerr effect (MOKE)
have been performed using linearly polarized laser light ofa single wavelength typically in the visible region. Recently,
there has been remarkable progress in new-generation
light sources, such as the X-ray free-electron laser (FEL)
and the high-harmonic generation (HHG) laser. These new
monochromatic lasers have ultra-short pulse widths andtunable photon energies ranging from the extended violet to
the X-ray region. Thus, MOKE measurements with photon
energy tuned at the absorption edge (so-called resonant
MOKE or RMOKE) are of considerable interest. Measurements with the new-generation light sources are expected tobe element-specific and to trace spin dynamics in real time
via time-resolved measurements.

In the present research, we have studied the Kerr
rotation angle and ellipticity in the RMOKE at photon
energies corresponding to the M-shell absorption edge of

Fig. 1. Photon energy dependence of the Kerr rotation angle, θk, of
the Ni film calculated with the resonant scattering theory (sim.) andmeasured experimentally with VUV synchrotron radiation (exp.).
Measurement was performed at room temperature under a magnetic
field of B = ± 0.47 T.

transition metal. We investigated the RMOKE in the wellknown nickel film both theoretically and experimentally.
The simulation was carried out with resonant scattering
theory based on the Kramers-Heisenberg formula. The
predicted Kerr rotation angle indicated a large MOKE (>10˚). Then, the large Kerr rotation angle was confirmedby rotating analyzer ellipsometry using vacuum ultraviolet (VUV) synchrotron radiation at KEK PF BL-18A.
Figure 1 compares experimentally measured and calculated
variations of θk with photon energy. The experiment reproduced large θk values (~10 degree) at the absorption edge:
the overall features are in good agreement with the calculations, where the model parameter set has been independently
determined with other core-level spectroscopies.
Since the RMOKE measurement is inherently element
specific and is a photon-in and photon-out experiment, it isable to probe spin states of selected elements in complicatedmagnetic materials under external electromagnetic fields.
Moreover, we observed a large Kerr rotation angle (> 10˚)in the RMOKE, which is much larger than angles (<1˚)
typically found for the MOKE with visible light. Conventional MOKE measurement has always required lock-in
amplifier techniques to obtain a high enough signal-to-noise
ratio. However, the large Kerr rotation angle in the RMOKE
we observed does not require such techniques. This advantage allows us to detect the magnetism or spin dynamics ofa very small amount of the magnetic element in a material,
such as a dilute magnetic semiconductor, or to measure verysmall structure, such as the magnetic nanostructure on asurface. This feature makes it possible to trace these ultrafast
spin dynamics in terms of individual chemical species inreal time when combined with FEL or HHG lasers.
Reference[1] Sh. Yamamoto, M. Taguchi, M. Fujisawa, R. Hobara, S. Yamamoto,K. Yaji, T. Nakamura, K. Fujikawa, R. Yukawa, T. Togashi, M. Yabashi,
M. Tsunoda, S. Shin, and I. Matsuda, Phys. Rev. B 89, 064423 (2014).
Authorsa
I.
Matsuda, Sh. Yamamoto, T. Nakamura , and S. ShinaJapan Synchrotron Radiation Research Institute/SPring-8

Ultra-Broad Mode-Spacing
Optical Frequency Comb
Kobayashi GroupA mode-locked oscillator produces bunch of regularly
spaced longitudinal modes in an optical frequency region. It
is called as an optical frequency comb. When the frequency
comb was invented, it was regarded as a dream light source
since one oscillator produces tens of thousands modes, corresponding to thousands of ultra-narrow linewidth cw lasers.
Many people said that cw lasers were no longer necessary
since making the mode-locked laser was easier than making
very stable cw lasers. However, this story was not correct.
One could not chose one comb tooth from neighboringmodes because the mode spacing was too small to pick byusing any dispersive optics. The mode-spacing is a repetition
rate of the mode-locked (ML) oscillator, the high-repetition
rate then makes broad mode spacing. The repetition rate of
the ML laser is determined by the cavity length since only
one pulse is propagating in a cavity. The smaller cavity then

ISSP Activity Report 201323

Fig. 1. Schematic of the experimental setup. DMs, dichroic mirrors;
CM, chirp-compensation mirror; HR, high reflection mirror; L1 and L2,
lenses.

produces the broader mode-spacing optical frequency comb.
Another direction is to make higher resolution spectrometeror spectrograph to resolve each mode. The highest frequency
resolution in a commercially available spectrometer is about
4 GHz in an optical frequency, then the higher repetition rate
than 4 GHz is crucial to resolve comb teeth.
Here we report on our recent progress of high-repetitionrate ML oscillator [1]. We are concentrating on the laserdiode (LD) pumped Kerr-lens ML oscillator. There are somereasons to study this type of lasers. Typical high-repetitionrate comb is made by using Ti:sapphire laser pumped by alarge green laser which is not easy to keep running for manydays. However, many applications of the frequency comb
require long-term operation. A single-mode-fiber (SMF)
coupled LD can be kept running as long as we need without
any degradation or miss alignment. The main drawback is
its poor power. The highest power of the SMF coupled LD islimited below 1 W. Lower power pumping makes it difficult
to realize high-repetition-rate ML oscillator. We invented
new scheme of the ML oscillator with high finesse. This
makes the intra-cavity power high enough to realize the Kerrlens ML. By adopting Yb-doped ceramic as a gain medium,
we have realized 6-GHz repetition rate oscillator with femtosecond pulse duration.
Figure 1 shows the schematic of the small oscillator.
ML oscillator consists of two concave mirrors and twoplane mirrors. One of the plane mirror is specially coatedFig. 2. Absorption spectroscopy of meta-stable He. Red curve shows
the laser spectrum without He atoms. The modulation correspond comb
structure. Blue curve was obtained with meta-stable He atoms. We cansee clear two absorptions that correspond to the triplet S to triplet P
transitions in a meta-stable state. 1S-2S transition is strictly prohibitedso that the metastable life time is long enough to observe these transitions.

24

ISSP Activity Report 2013

to compensate a chirp in the cavity. 1-mm-thick Yb:Lu2O3
ceramic was used for the laser gain. Obtained spectrum
width was about 8 nm, and the measured pulse duration was
160 fs. By using commercially available optical spectrum
analyzer, each comb mode was clearly resolved. This comb
is applied for the precision spectroscopy of meta-stable He
atoms, which has three absorption lines in the spectrum of
this laser. Figure 2 shows the absorption spectroscopy of
He obtained with 5.2-GHz repetition rate at this time. Three
3
3
3
3
3
3
lines correspond 2 S1- 2 P0, 2 S1- 2 P1 and 2 S1- 2 P2
3
3
transitions. The energy spacing of 2 P0- 2 P1 is 30 GHz, and33that of 2 P1- 2 P2 is 2 GHz, which is too small to resolve inthis setup. The absolute frequency could be determined if theoffset frequency is controlled, although it is not realized yet.
We have demonstrated the multi-GHz repetition-rate
Kerr-lens ML oscillator with LD pumping for the first time
to our best knowledge. It would open new applications withmode-resolved spectroscopy. The astronomical applicationis one of the promising candidate, in which this kind of laser
could be used in order to find extra-solar planets.
Reference[1] M. Endo, A. Ozawa, and Y. Kobayashi, Opt. Lett. 38, 4502 (2013).
Authors
M. Endo and Y. Kobayashi

Generation of Attosecond Soft-X-Ray
Bursts in the Water Window
Itatani GroupHigh harmonic generation using intense laser pulses is
the most promising method to produce attosecond opticalpulses. In the past decade, attosecond science has been
extensively exploited using the advanced Ti:sapphire laser
technology that can produce attosecond pulses in the extreme
ultraviolet (EUV) below 200 eV in photon energies. Recent
development of intense infrared sources that are based on
optical parametric chirped-pulse amplification (OPCPA)
has opened the opportunities to extend the spectral range ofhigh harmonics from the EUV to the soft X ray region, but
the lack of well-controlled reliable IR sources has been the
problem to realize attosecond soft-X-ray spectroscopy.
In the present research [1], we have developed a novel IR
light source that is based on OPCPA using BiB3O6 crystals
pumped by Ti:sapphire lasers. This OPCPA system canamplify an octave-spanned bandwidth from 1100 to 2200
nm, which enables the phase-stable direct amplification of
sub-two-cycle IR pulses. The light source produces 0.5-mJ,

Fig. 1. (a) Experimentally obtained high harmonic spectra recorded atrelative carrier-envelope phases in steps of 0.1π rad. (b) Simulated highharmonic spectra 14
assuming
10-fs optical pulses at 1600 nm with an2
intensity of 4 × 10 W/cm .

9-fs pulses with stable carrier-envelope phases (CEPs) at
1-kHz repetition rate. We have achieved excellent stabilities
in the output energy and CEP, which are comparable to thoseof commercial Ti:sapphire lasers.
Figure 1(a) shows observed high harmonic spectra
around the cutoff photon energy as a function of the CEP.
The maximum photon energy reaches ~330 eV that is wellbeyond the carbon K edge at 284 eV. The shifting structuresof the spectral peak is called the half-cycle cutoff, which is aclear signature of the generation of single isolated attosecond
pulses. Figure 1(b) shows simulated results that are basedon the strong-field approximation assuming the experimental parameters described in the caption of Fig. 1(a). The
good agreement between the experimental and simulation
results suggests the generation of isolated attosecond bursts
in the water window. This result is an important milestone
to extend the attosecond spectroscopy into the soft X ray
region where element-specific ultrafast spectroscopy as well
as novel attosecond techniques using high-energy electron
wavepackets can be explored in the future.
Reference[1] N. Ishii, K. Kaneshima, K. Kitano, T. Kanai, S. Watanabe, and
J. Itatani, Nature Comm. 5, 3331 (2014).
Authors
N. Ishii, K. Kaneshima, K. Kitano, T. Kanai, S. Watanabea, and
J. ItataniaTokyo University of Science

ISSP Activity Report 201325

Highlights of Joint Research
Supercomputer CenterAll staff members of university faculties or publicresearch institutes in Japan are invited to propose research
projects (called User Program). The proposals are evaluatedby the Steering Committee of SCC. Pre-reviewing is done by
the Supercomputer Project Advisory Committee. In school
year 2013 totally 245 projects were approved. The total
points applied and approved are listed on Table. 1 below.
The research projects are roughly classified into thefollowing three (the number of projects approved):

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

Class

Max/Min
PointsApplication

Numberof
Projects

All the three involve both methodology of computationand its applications. The results of the projects are reported
in 'Activity Report 2013' 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 2013, thefollowing three invited papers are included:"One-hundred-million-atom electronic structure calculations on the K computer", Takeo HOSHI"Strong correlation of electrons studied by computational
approaches—Physics of superconductors and topologicalphases", Shiro SAKAI, Takahiro MISAWA, Youhei
YAMAJI, Mayuru KURITA, and Masatoshi IMADA"Coarse-Grained Simulation of Surfactant Membrane",
Hayato SHIBA and Hiroshi NOGUCHI

Total Points
AppliedApproved

System A

System B

System C

System A

System B

System C

350

850

500

350

850

500

A

100

any timeB

2k, 1k, 500

twice a year

56

40.7k

45.0k

6.6k

28.7k

29.8k

5.8k

C

20k, 10k, 2.5k

twice a year

130793.5k1043.0k146.9k

486.5k

391.0k98.6k

D20k, 10k, 2.5k

any time

3

0

22.0k

0

0

19.0k

0

E

0, 30k, 2.5k

twice a year24-

653.0k

43.8k-283.5k36.6k

twice a year

0

0

0

0

0

0

0

CMSI

22

-

-

-

-

-

92.5k

Total

245

834.6k

1,763.9k

197.8k

515.6k724.2k

144.0kS

10First-Principles Calculation of Materials Properties (107)
Strongly Correlated Quantum Systems (30)
Cooperative Phenomena in Complex, Macroscopic
Systems (86)

Table 1. Research projects approved in 2013
The maximum points allotted to the project of each class are the sum of the points for the two systems; Computation for
1 CPU • hour corresponds to 0.32, 0.022, and 0.042 points for System-A, System-B, and System C, respectively.

26

ISSP Activity Report 2013

Neutron Science Laboratory
The Neutron Science Laboratory (NSL) has been playing
a central role in neutron scattering activities in Japan since
1961 by performing its own research programs as well as
providing a strong General User Program for the universityowned various neutron scattering spectrometers installedat the JRR-3 (20MW) operated by Japan Atomic Energy
Agency (JAEA) in Tokai (Fig. 1). In 2003, the Neutron
Scattering Laboratory was reorganized as the Neutron
Science Laboratory to further promote the neutron science
with use of the instruments in JRR-3. Under the General
User Program supported by NSL, 14 university-group-owned
spectrometers in the JRR-3 reactor are available for a wide
scope of researches on material science, and proposals close
to 300 are submitted each year, and the number of visiting
users under this program reaches over 6000 person-day/year.
In 2009, NSL and Neutron Science Laboratory (KENS),
High Energy Accelerator Research Organization (KEK)
built a chopper spectrometer, High Resolution Chopper
Spectrometer, HRC, at the beam line BL12 of MLF/J-PARC(Materials and Life Science Experimental Facility, J-PARC).
HRC covers a wide energy and Q-range (10μeV < ℏω < 2eV
and 0.02Å-1 < Q < 50Å-1), and therefore becomes complementary to the existing inelastic spectrometers at JRR-3.
HRC started to accept general users through the J-PARC
proposal system in FY2011.
Triple axis spectrometers, HRC, and a high resolution powder diffractometer are utilized for a conventional
solid state physics and a variety of research fields on hardcondensed matter, while in the field of soft-condensed matterscience, researches are mostly carried out by using the small
angle neutron scattering (SANS-U) and/or neutron spin echo
(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 2014, JRR-3 has not restarted yet. General
User Programs of 2012 and 2013 were cancelled and that of2014 has been suspended so far. In order to compensate theFig. 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.

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 celebrate the completion of the project in
October 2010.)

loss of the activity of NSL, a number of proposals acceptedin 2011 - 2013 were transferred to overseas owing to kindoffer from the major facilities, namely, ORNL, ILL, ANSTO,
and HANARO.
The NSL also operates the U.S.-Japan Cooperative
Program on neutron scattering, providing further research
opportunities to material scientists who utilize the neutron
scattering technique for their research interests. In 2010,
relocation of the U.S.-Japan triple-axis spectrometer, CTAX,
was completed, and it is now open to users (Fig. 2).
http://neutrons.ornl.gov/instruments/HFIR/CG4C/
The activity report on Neutron Scattering Research in
JFY2011 is given in NSL-ISSP Activity Report vol. 18 (2011),
http://quasi.issp.u-tokyo.ac.jp/actrep/actrep-18-2011/indexpub_vol18.html.

International MegaGauss
Science Laboratory
The objective of this laboratory (Fig. 1) is to study thephysical properties of solid-state materials (such as semiconductors, magnetic materials, metals, insulators, superconducting materials) under ultra-high magnetic field conditions.
Such a high magnetic field is also used for controlling the
new material phase and functions. Our pulse magnets, atmoment, can generate up to 87 Tesla (T) by non-destructive
manner, and from 100 T up to 760 T (the world strongest as

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

ISSP Activity Report 201327

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

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

an in-door record) by destructive methods. The laboratoryis opened for scientists both from Japan and from overseas,
especially from Asian countries, and many fruitful results are
expected to come out not only from collaborative research
but also from our in-house activities. One of our ultimate
goals is to provide the scientific users as our joint researchwith magnets capable of a 100 T, milli-second long pulses ina non-destructive mode, and to offer versatile physical precision measurements. The available measuring techniques now
involve magneto-optical measurements, cyclotron resonance,
spin resonance, magnetization, and transport measurements.
Recently, specific heat and calorimetric measurements arealso possible to carry out with sufficiently high accuracy.
Our standard non-destructive-type pulse magnets areenergized by single capacitor bank and can generate fields up
to 75 T for ordinary use. Their simple sinusoidal waveforms
are advantageous for precise and reliable measurements ofvarious physical properties. Several on-demand magnets

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

28

ISSP Activity Report 2013

having irregular shapes and sizes are developed for someparticular experiments. We open six magnet cells for parallel
experiments and accept more than 50 research projects per
year in 2013.
A 210 MJ flywheel generator (Fig. 2), which is the world
largest DC power supply (recorded in the Guinness Book ofWorld Records) has been installed in the DC flywheel generator station at our laboratory, and used as an energy source oflong pulse magnets. The magnet technologies are intensively
devoted to the quasi-steady long pulse magnet (an order of
1-10 sec) energized by the giant DC power supply. The latest
long-pulse magnet can generate fields up to 36 T with its
pulse half-period of 1 sec.
Our interests cover the study on quantum phase transitions (QPTs) induced by high magnetic fields. Fieldinduced QPTs have been explored in various materials
such as quantum spin systems, strongly correlated electron
systems and other magnetic materials. Direct thermodynamic evidences of QPTs are obtained through magnetization and recently developed caloric measurements. For some
QPTs, changes in symmetry at the transitions are sensitively
resolved through measurements of electric polarization or
optical imaging using a polarizing microscope. High resolution of electrical measurements realized the observationof quantum oscillations in high quality crystals throughmeasurements of electrical resistivity, contactless impedance,
and torque magnetometry.
Magnetic fields higher than 100 T can only be obtainedwith destructing a magnet coil, where ultra-high magnetic
fields are obtained in a microsecond time scale. Our destructive techniques have undergone intensive developments.
The project, financed by the ministry of education, culture,
sports, science and technology, is now in progress, and goal
is to generate 1000 T by the electromagnetic flux compression (EMFC) system (Fig. 3). The system which is unique to
ISSP in the world scale is comprised of a power source of 5
MJ main condenser bank and 2 MJ condenser bank and has
been accomplished its installation. Two magnet stations areconstructed and both are energized from each power source.
Both systems are fed with a 2 MJ condenser bank used for aseed-field coil, of which magnetic flux is to be compressed.
As an easy access to the megagauss science andtechnology, we have the single-turn coil (STC) systemcapable of generating the fields of up to 300 T by afast-capacitor of 200 kJ. We have two STC systems, one isa horizontal type (H-type) and the other is a vertical type

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

36 T

5 ms
10 mm

Lowest temperature
0.1 K

Down to 0.3 K

0.5 MJ, 20 kV

Magnetization
Magneto-Transport

2K –Room temperature

210 MJ, 2.7 kVResistance
Magneto-Calorimetry

2K –Room temperature

5 ms
18 mm
1s
30 mm

Independent
Experiment in 5 site

Table 1. Available Pulse Magnets, Specifications(V-type, Fig. 4). Various kinds of laser spectroscopy experiments such as the cyclotron resonance and the Faraday
rotation using the H-type STC are available. On the other
hand, for very low-temperature experiments, a combinationof the V-type STC with a liquid helium bath cryostat is very
useful and the magnetization measurements at temperature
as low as 2 K can be performed up to 120 T with high precision.

Center of Computational Materials Science
K-computer at Kobe won the title of the world-fastest
computer at TOP500 ranking announced at ISC11. Though
it is in the 4th place in the list as of today, it is still providing
the Japanese scientific community with an incomparable
amount of computational 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) is a specialized research
center for promoting computer-aided materials science withmassively parallel computers, such as K-computer. The
center also functions as the headquarters of Computational
Materials Science Initiative (CMSI), which is an inter-institutional organization for computational science of a broad
range of disciplines, including molecular science, quantum

chemistry, biological materials, and solid state physics. ISSP
made contracts with 9 universities and 2 national institutes
for supporting 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.
CCMS has a branch office in the RIKEN AICS buildingon the Port Island Kobe, where K-computer is located,for supporting CMSI researchers getting together at the
K-computer site to exchange idears of computational
science, fine-tune various applications software, and develop
better contact with staff members of RIKEN, the operating

Fig. 1. CMSI International Satellite Meeting 2013 in Kobe

ISSP Activity Report 201329

Laser and Synchrotron Research Center(LASOR Center)Fig. 2. Workshop: Programming Techniques for K-Computer (Mishima)

institute of K-computer. Another mission of the Kobe
branch of CCMS is exchanging ideas and techniques withresearchers from other fields of computer science. (There
are 5 major fields in the HPCI strategic program of MEXT,“biology”, “materials and energy” (our field), “seismology,
oceanography and meteorology”, “industrial applications”,
and “high-energy physics and cosmology”.)
The following is the selected list of meetings organized
by CMSI and CCMS in SY2013:• “CMSI Kobe Hands-On: xTAPP Tutorial”(Apr 23, Jul 30/2013, Kobe)• “Workshop: Programming Techniques for K-Computer”(Jul 1-Jul 3/2013, Mishima)• “Internaitional Workshop: EQPCM2013”(Jun 3-Jun 21/2013, Kashiwa)• “CMSI Application Developments Seminar TOKKUN!”(Jun 5, Aug 5, Sep 3/2013, Kobe)• “CMSI Kobe Hands-On: ALPS Tutorial”(Jul 10, Nov 6/2013, Kobe)• “CMSI Kashiwa Hands-On: Machikaneyama2002
Tutorial” (Jul 26/2014, Kashiwa)• “CMSI Division 1 Summer School”(Aug 12-Aug 16/2013, Zao)
• “CMSI Kobe Hands-On: Version Control System
Tutorial” (Aug 22/2013, Kobe)• “CMSI International Satellite Meeting 2013 in Kobe”(Oct 16-Oct 18 /2013, Kobe)• “CMSI International Satellite Meeting 2013 in Nagoya”(Oct 17-Oct 19 /2013, Nagoya)• “CMSI International Satellite Meeting 2013 in Tokyo”(Oct 18-Oct 19/2013, Hongo)• “CMSI International Symposium 2013”(Oct 21-Oct 22/2013, Hongo)• “CCMS Symposium” (Nov 19-Nov 20/2013, Kashiwa)• “ISSP supercomputer - CMSI Joint Symposium”(Dec 10-Dec 13/2013, Kashiwa)• “CMSI Kashiwa Hands-On: Version Control System
Tutorial” (Jan 14/2014, Kashiwa)• “Workshop: Programming Techniques for K-Computer”(Jan 28-Jan 30/2014, Atami)• “CMSI Kashiwa Hands-On: xTAPP Tutorial”(Feb 26/2014, Kashiwa)• “Joint Symposium of Elements Strategy Initiative,
CMSI, SPring-8, J-PARC and KEK”
(Feb 28-Mar 1/2014, Kashiwa)• “CMSI Kobe Hands-On: Rokko Tutorial”(Mar 11/2014, Kobe)

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

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

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

30

ISSP Activity Report 2013

Fig. 3. Close look of a high-peak-power ultrashort-pulse laser

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

spectroscopy, diffraction, light scattering, imaging, microscopy and fluorescence spectroscopy are in progress byemploying new coherent light sources based on laser andsynchrotron technologies that cover a wide spectral range
from X-ray to terahertz. In LASOR Center, a variety ofmaterials sciences for semiconductors, strongly-correlatedmaterials, molecular materials, surface and interfaces, andbio-materials are studied using advanced light sources andadvanced spectroscopy. Another important aim of LASOR
Center is the synergy of photon and materials sciences. Mostof the research activities on the extreme laser development
and their applications to material science are performed in
the ISSP buildings D and E at Kashiwa Campus where large
clean rooms and the vibration-isolated floor are installed.
On the other hand, the experiments utilizing the advanced
synchrotron source are performed at beamline BL07 in
SPring-8 (Hyogo).

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

• Extreme Laser Science GroupThe advancement of ultrashort-pulse laser technologies
in the past decade has transformed the laser development
at ISSP into three major directions, (i) towards ultrashortin the time domain, (ii) ultra high resolution in the spectral
domain, and (iii) the extension of the spectral range, withextreme controllability of the laser sources. For ultrafast
spectroscopy, we have developed carrier-envelope phasestable intense infrared light source that can produce sub-two
cycle optical pulses for high harmonic and attosecond pulse
generation. So far we observed coherent soft-X-ray radia-• Soft-X-ray and Materials Science Group
Recently, VUV and SX lasers have been developed. They
become very usuful for the materials science, if we develop
the SX spectroscopy, such as the cutting-edge photoemission spectroscopy. Laser has a lot of fruitful properties. For
examples, by using monochromatic light, ultra-high resolution angle-resolved photoemission spectroscopy (ARPES) isdeveloped. The achieved resolution of 70-μeV is the highest
resolution of the world. Fermiology of the materials science
with μeV resolution is improved drastically by using thelasers. On the other hand, when we use pulsed laser light, thetime resolved ARPES becomes possible. The time resolved
photoemision in fs region is powerful to know the relaxation
process of photo-induced phase transition. Furthermore, byusing CW and circulary light in VUV region, the photoelec-

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

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

ISSP Activity Report 201331

Fig. 1. 3D nano ESCA at SPring-8 BL07LSU
Fig. 7. Photonics devices under study: (left panel) semiconductor
quantum wires and (right panel) firefly-bioluminescence system
consisting of light emitter (oxyluciferin) and enzyme (luciferase)tron microscopy(PEEM) is developed. The spatial resolutionof nm region is very powerful for the nanomaterials.
• Coherent Photon Science GroupThe coherent-photon science group has main interests in exploring a variety of coherent phenomena andnon-equilibrium properties of excited states in condensed
matters, in collaborations with research groups in chargeof photoemission, operand-spectroscopy and extreme laser
science. This group covers a wide range of materials, fromsemiconductors, ferromagnets, complexes and superconductors to biomaterials. Various ultrafast optics technologies
such as femtosecond luminescence and pump-and-probetransmission/reflection spectroscopy are applied to studies on
wavepacket dynamics, photo-induced phase transitions andcarrier dynamics. Coherent control and observation of spin
dynamics in magnetic materials and metamaterial structuresby using high power terahertz radiation source is extensively
studied. Advanced photonics devices are intensively studied,such as quantum nano-structure lasers with novel low-dimensional gain physics, low-power light-standard LEDs, very
efficient multi-junction tandem solar cells for satellite use,
and wonderful bio-/chemi-luminescent systems for widebio-technology applications.

netic nanofilms.
The SRL staffs have joined the Materials Research
Division of the Synchrotron Radiation Research Organization (SRRO) of the University of Tokyo and they haveplayed an essential role in constructing a new high brilliant
soft X-ray beamline, BL07LSU, in SPring-8. The lightsource is the polarization-controlled 25-m long soft X-ray
undulator. The monochromator is equipped with a variedline-spacing plain grating, which covers the photon energy
range from 250 eV to 2 keV. At the downstream of thebeamline, four experimental stations have been developed forfrontier spectroscopy researches: the three-dimensional (3D)

Fig. 2. XES station at SPring-8 BL07LSU

Synchrotron Radiation Laboratory
The Synchrotron Radiation Laboratory (SRL) was established in 1975 as a research division dedicated to solid statephysics using synchrotron radiation (SR). In 1989, SRL
started to hold the Tsukuba branch, 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, was developed at
BL-19A. SAPRES measurements have now been performed
with high-resolution and the experiments at the beamline
have become important for exciting topics of surface/solidstate physics such as topological insulators and ferromag-

32

ISSP Activity Report 2013

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

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. The beamline construction was completed
in 2009 and SRL established the Harima branch laboratory
in SPring-8. At SPring-8 BL07LSU, each end-station has
achieved high performance: the 3D nano-ESCA reaches thespatial resolution of 70 nm, the XES station obtains spectrawith energy resolving power E/∆E larger than 5,000, andthe TR-SX have established the laser-pump and SR-probe
method with the time-resolution of 50 ps which corresponds
to the SR pulse-width. The four end-stations have now been
opened fully to outside users. In 2013, 153 researchers madetheir experiments during the SPring-8 operation time of 3400
hours.

ISSP Activity Report 201333

Experimental Realization of a Quantum
Breathing Pyrochlore Antiferromagnet
K. Kimura and S. Nakatsuji
Exploring novel and exotic phenomena associatedwith spin degrees of freedom has been central subject
in condensed matter physics [1]. One of the most attractive systems in three dimension is a pyrochlore latticemagnet, which consists of corner-sharing regular tetrahedraof magnetic ions. The inherent geometrical frustration
suppressing a conventional magnetic order often leads toa variety of unusual properties [1]. A key building unit ofpyrochlore magnets is a single spin tetrahedron. Besides
being a good starting point for considering the essence ofphysics of full pyrochlore lattice, it has been theoreticallyshown to possess interesting properties such as a doubly
degenerate singlet state which can be labelled by scalar spinchirality [2]. To our knowledge, however, there has been no
experimental realization of the S = 1/2 quantum spin tetrahedral system, partly because typical 3d transition metal ionswith S = 1/2 (like Cu2+) are difficult to keep the tetrahedral
symmetry due to the inherent Jahn-Teller instability.
Here, we report the new Yb-based quantum spin system
Ba3Yb2Zn5O11 [3]. Polycrystalline samples were synthesized
by the standard solid state reaction method. The Rietveld
refinement on powder X-ray diffraction pattern has revealed
that this material crystallizes into the cubic structure withspace group F-43m, and Yb3+ ions form a so-called breathing
pyrochlore lattice [4] characterized by an alternating arrayof small and large Yb3+ regular tetrahedra (Fig. 1(a), inset).
Analyses of the crystalline electric field (CEF) scheme of
Yb3+ ions (4f13) and magnetic susceptibility data down to
30 K show that the CEF ground state is approximated bya magnetic Kramers doublet with the isotropic effective
g-factor geff = 2.66 for pseudospin-1/2. The very large gap(>500 K) to the excited states ensures that the low-temperature properties are described by pseudospin-1/2.
The temperature dependence of the magnetic susceptibility below 30 K is shown in Fig. 1(a). A broad maximum
at around 4 K suggests a formation of a quantum spin singlet
state due to antiferromagnetic interactions in a small Ybtetrahedron. This is supported by the magnetization curves
at selected temperatures (Fig. 1(b)). Though linear above 4
K, the magnetization curves show a clear non-linear increaseat B ~ 3 T below 4 K, a signature of the singlet-triplet crossover. These results are analyzed based on the pseudospin-1/2
single tetrahedron model with Heisenberg interactions J.
The good agreement is obtained with J = -6.43 K and geff =2.569, as indicated by the solid lines in Figs. 1(a) and 1(b),suggesting a formation of the doubly degenerate singlet stateFig. 1. (a) The temperature dependence of the magnetic susceptibility
below 30 K. Inset: Breathing pyrochlore lattice formed by Yb ions.
(b) The magnetization curves at selected temperatures. Solid lines in(a) and (b) represent calculated values based on the single tetrahedronmodel with Heisenberg J = -6.43 K and geff = 2.569.

34

ISSP Activity Report 2013

Fig. 2. The temperature dependence of (a) the magnetic specific heat
CM and (b) corresponding magnetic entropy SM. Solid lines in (a)and (b) are fit to the single tetrahedron model. The dashed lines in(b) denote the entropy for a two level system Rln(2) and for a doubly
degenerate singlet state (3/4)Rln(2).

with chirality fluctuations predicted by the model [2]. Solidevidence for the double degeneracy is provided by magnetic
specific heat CM measured at ISSP (Fig. 2(a)). CM down
to 0.38 K exhibits a broad peak associated with the singlet
formation without any signs of long-range order. Corresponding magnetic entropy SM is shown in Fig. 2(b). The
saturated value at 20 K is close to 75% of the value expected
for a standard two level system Rln(2), and 25% of magnetic
entropy remains below 0.38 K. This value is fully consistent
with the doublet degeneracy of the singlet state expectedfrom the single tetrahedral model. Moreover, as indicated by
the red line of Figs. 2(a) and 2(b), CM and SM are well reproduced by the model.
All the data presented in this study therefore uncover theunique doubly degenerate singlet state with chirality fluctuations at T = 0.38 K. To the best of our knowledge, this is a
new quantum state of matter which has never been established in existing materials. The mechanism for the liftingof the degeneracy is highly interesting and left for the future
study.
References[1] L. Balents, Nature 464, 199 (2010).
[2] H. Tsunetsugu, J. Phys. Soc. Jpn. 70, 640 (2001).
[3] K. Kimura, S. Nakatsuji, and T. Kimura, arXiv: 1404.6439[4] Y. Okamoto, G. J. Nilsen, J. P. Attfield, and Z. Hiroi, Phys. Rev.
Lett. 110, 097203 (2013).
Authors
K. Kimuraa, S. Nakatsuji, and T. KimuraaaOsaka University

Entanglement Spectra between
Coupled Tomonaga-Luttinger Liquids
R. Lundgren, Y. Fuji, and S. Furukawa
Quantum entanglement has emerged as a new tool tocharacterize quantum phases. While the entanglement isnothing but “quantum correlation” that has been a central
issue in condensed matter physics for a long time, newquantitative descriptions of the entanglement stimulated byquantum information theory have proved useful. The mostfrequently used quantity to describe the entanglement inquantum many-body problem is “entanglement entropy”.
However, there are other quantities which can be useful, andentanglement spectrum is one of them. Its relation to thespectrum of physical edge states is conjectured [1], and has
been confirmed in several examples.
Here we report on a recent joint research [2] on entanglement spectra between two coupled Tomonaga-Luttinger

Fig. 1. The dispersion of entanglement spectra of a spin ladder model
when a linear combination of two TL fields remains gapless while theother acquires a gap. The numerically obtained dispersion relationagrees well with the peculiar square-root dependence predicted by thetheory.

liquids (TLLs). TLL is a ubiquitous effective field theory forquantum many-body problem in one dimension, and many
physical systems such as quantum spin ladders and carbon
nanotubes are described as coupled TLLs. There are varietyof phases in coupled TLLs. In a class of gapless phases ofcoupled non-chiral TLLs, we find an entanglement spectrumwith a dispersion relation proportional to the square root of
the subsystem momentum. This result was derived using thefield theory, and was then confirmed numerically for a spinladder model. Such a dispersion is generally not expected
for a spectrum of physical excitations, including those ofedge states. We relate the unusual dispersion relation in theentanglement spectrum to a long-range interaction in theentanglement Hamiltonian. Our result sheds new light on thecorrespondence between the entanglement spectrum and thespectrum of the edge states.
This work was performed during a visit by R. Lundgren,a Ph. D. student at University of Texas, under the NSF
East Asia and Pacific Summer Institutes for U.S. Graduate
Students and the JSPS Summer Program, hosted by ISSP in
cooperation with Department of Physics, the University ofTokyo.
References[1] H. Li and F. D. M. Haldane, Phys. Rev. Lett. 101, 010504 (2008).
[2] R. Lundgren, Y. Fuji, S. Furukawa, and M. Oshikawa, Phys. Rev. B
88, 245137 (2013).

by the surface [2], and thus is suitable for investigating the
TSS characteristics.
The elastic-scattering vector within the TSS on thecleaved surface was obtained from a quasiparticle interference (QPI) pattern, which is a Fourier-transformed constantvoltage dI/dV image measured using scanning tunnelingmicroscopy at 5 K (Fig. 1). The observed elastic scattering
amplitude within the TSS was critically suppressed beyond
certain scattering-vector lengths, both in the Γ̅ -M
̅ and in Γ̅ -K̅
directions. That is, there is a critical scattering-vector length,

Fig. 1. (a) Topographic STM image of a cleaved surface of
Bi1.5Sb0.5Te1.7Se1.3. (b) dI/dV image at the sample bias voltage Vb= 0.28 V. (c) Amplitude map of the elastic scatterings, or QPI map,derived by Fourier transformation (FT) of the dI/dV image shown in(b). (d) FT amplitude image in Γ̅ - K
̅ and in Γ̅ -M
̅ directions as functionsof Vb. Critical scattering-vector lengths are plotted as red and blue
symbols.

Authors
R. Lundgrena, Y. Fuji, S. Furukawab, and M. OshikawaaUniversity of Texas at Austinb
The University of Tokyo

Robust Protection from Backscattering in
a Topological Insulator
Y. Ando, S. Shin and F. Komori
Surface of three-dimensional (3D) topological insulators (TIs) is a promising platform for novel device functions,whereon robust spin-polarized surface states occur due
to topological feature of the bulk wave functions. Highcarrier mobility is expected on 3D TI surface because 180ºbackscattering is forbidden under the spin-helical texture of
the topological surface states (TSSs). However, the prohibition range of backscattering has not been clarified yet. Here,
we study how the elastic scattering is suppressed as functionsof the scattering angle and electron energy in a single andunwarped upper Dirac cone of Bi1.5Sb0.5Te1.7Se1.3 [1]. The
quaternary compound Bi1.5Sb0.5Te1.7Se1.3 is identified to abulk-insulating TI, whose transport properties are dominatedFig. 2. (a,b) Intensity maps of ARPES before (a) and after (b)impinging a 170-fs pump laser pulse (1.5 eV). The dispersions above
EF are revealed by pumping the electrons into the unoccupied side.
An arrow in (b) indicates the bottom of the bulk conduction band. (c)Comparison between critical scattering-vector lengths qcx and qcy (redand blue symbols) obtained from QPI images and the dispersion of the
TSS (circles) from pump-probe ARPES. (d) Schematic of the elastic
scattering within a nearly ideal Dirac TSS. Scattering angle larger than
100º is effectively prohibited.

ISSP Activity Report 201335

qc, beyond which the scattering is effectively prohibited.
The critical length increased with the increase of energy
from the Dirac point as shown in Fig. 1(d). The band dispersions displayed in Fig. 2(a,b) were recorded by using angleresolved photoemission spectroscopy (ARPES) implemented
by a pump-and-probe method. Here, the dispersions above
the Fermi level were revealed by pumping electrons into
the unoccupied states (Fig. 2(b)). A nearly ideal Dirac-cone
dispersion was observed within the bulk band gap. The locusof the Dirac point, bulk-conduction-band minimum, andthe band velocity of the TSS were obtained. We find thatthe critical scattering vector length is 75 % shorter than thelength of the 180o backscattering vector (Fig. 2(c)). This
indicates that the scattering in the TSS is effectively prohibited in a wide angular range of 100-180o as schematicallyshown in Fig. 2(d). The robust protection from backscattering is good news for applications, but it poses a challenge
to the theoretical understanding of the transport in the TSS.
References[1] S. Kim, et al., Phys. Rev. Lett. 112, 136802 (2014).
[2] A. A. Taskin et al., Phys. Rev. Lett. 109, 066803 (2012).
Authorsaaa
S. Kim, S. Yoshizawa, Y Ishida, K. Eto , K. Segawa Y. Ando , S. Shin,andF. KomoriaOsaka University

Microscopic Origin of π Electronic
States in Silicene Revealed by
Scanning Tunneling Microscopy
Y. Yamada-Takamura, T. Ozaki, and Y. Hasegawa
Silicene, a monolayer of silicon atoms forming a
two-dimensional honeycomb lattice, has attracted significant attention in condensed matter physics because it has
electronic states similar with its carbon counterpart, grapheneand shares almost all the remarkable properties of graphene[1], such as massless Dirac fermion, pseudo spin, and the K/
K' valleys. There are, however, some differences between
the two ultimately thin materials; while graphene has aplanar structure, silicene is buckled [1]; the atoms in the two
sub-lattices have different heights, providing us a possibilityof inducing a staggered potential by an application of an
external electrical field [2]. Different from graphene, silicene
exhibits significant spin-orbit coupling [3], making it bear
topologically nontrivial electronic structure, which realizes
the quantum spin Hall effect or two-dimensional topologicalinsulator. The staggered potential can lift up degeneracy of
the K and K' valleys, opening up a possibility of an effective
spin polarized electron source [4].
Silicene has been formed so far on metal substrates, suchas Ag [5-7] by depositing Si on the substrate. It can also
be formed epitaxially on ZrB2 thin film grown on Si(111)substrate [8]; by annealing silicon atoms segregate from thesubstrate to form the one-monolayer silicon thin film on the
ZrB2(0001). Because of the lattice—matching— between the 2×2
unit cell of ZrB2(0001) and the √ 3 × √ 3 unit cell of silicene,— —the silicene on ZrB2 exhibits a √ 3 × √ 3 reconstruction.
Using a low-temperature scanning tunneling microscopy
and spectroscopy (STM/STS), we investigated atomic andelectronic structures of the silicon layer [9]. By comparing
the experimental results with those of first-principles density
functional theory calculations, we determined the atomic

36

ISSP Activity Report 2013

Fig. 1. (a) atomic structure of epitaxial silicene on ZrB2(0001) derived
from DFT calculations. Si atoms are colored in blue and Zr atoms arecolored in grey. (b) STM image (2 nm × 2 nm) (c-f) tunneling conductance (dI/dV) images at the sample bias voltages of -0.47 V, -0.36 V,-0.12 V, and -0.02 V, respectively.

structure and discussed the electronic states and the bonding
nature of each Si atoms within the unit cell.
Figure 1 shows results taken by STM/STS. Figure 1(a)is an atomic structural model determined in the present
study. Figure 1(b) is an STM image, and (c-f) are tunnelingconductance (dI/dV) images taken at various bias voltages,that is, local density of states (LDOS) mappings at the corresponding energy level with respect to the Fermi energy.
The structural model (Fig. 1(a)) and the STM image (b)indicate that the protrusions observed in the STM image
come from the atoms, marked C in the schematic, sitting
on top of Zr atoms. Because of the local configuration, thebuckling of the atom C is suppressed, making its orbitals
hybridize in planar sp2 manner. The tunneling spectra takenon the atoms indicate significant contribution of the pz orbital
to π/π* valence/conduction bands, which was observedwith angle-resolved photoemission (ARPES) [10]. The— —STS results also confirm the band gap due to the √ 3 × √ 3
buckled reconstruction observed by the ARPES study. On theother hand, atom A, which belongs to the same sub-lattice
as atom C, exhibits buckling larger than the free-standing
silicene, and possesses sp3-like hybridized orbitals. The
STM/STS results evidenced a clear correlation between
hybridization of the orbitals of the Si atoms and the buckling.
References[1] S. Cahangirov, M. Topsakal, E. Akturk, H. Sahin, and S. Ciraci,
Phys. Rev. Lett. 102, 236804 (2009).
[2] M. Ezawa, New J. Phys. 14, 033003 (2012).
[3] C.-C. Liu, W. Feng, and Y. Yao, Phys. Rev. Lett. 107, 076802 (2011).
[4] W.-F. Tsai, C.-Y. Huang, T.-R. Chang, H. Lin, H.-T. Jeng, and
A. Bensil, Nat. Commun. 4, 1500 (2013).
[5] P. Vogt, P. De Padova, C. Quaresima, J. Avila, E. Frantzeskakis,
M. C. Asensio, A. Resta, B. Ealet, and G. Le Lay, Phys. Rev. Lett. 108,
155501 (2012).
[6] L. Chen, C.-C. Liu, B. Feng, X. He, P. Cheng, Z. Ding, S. Meng,
Y. Yao, and K. Wu, Phys. Rev. Lett. 109, 056804 (2012).

[7] C.-L. Lin, R. Arafune, K. Kawahara, N. Tsukahara, E. Minamitani,
Y. Kim, N. Takagi, and M. Kawai, Appl. Phys. Express 5, 045802(2012).
[8] A. Fleurence, R. Friedlein, T. Ozaki, H. Kawai, Y. Wang, andY. Yamada-Takamura, Phys. Rev. Lett. 108, 245501 (2012).
[9] A. Fleurence, Y. Yoshida, C.-C. Lee, T. Ozaki, Y. Yamada-Takamura,and Y. Hasegawa, Appl. Phys. Lett. 104, 021605 (2014).
[10] R. Friedlein, A. Fleurence, J. T. Sadowski, and Y. YamadaTakamura, Appl. Phys. Lett. 102, 221603 (2013).
AuthorsaaaaA. Fleurence , Y. Yoshida, C.-C. Lee , T. Ozaki , Y. Yamada-Takamura ,andY.
HasegawaaJapan Advanced Institute of Science and Technology

Multiferroic Nanopillar Composites
Y. Matsumoto and M. Lippmaa
Composite materials can be used to elastically couple
ferroelectrics and ferromagnets, producing a multiferroic
material where the magnetization can be controlled by anelectric field or the dielectric polarization by a magnetic
field. In this work, a nanoscale pillar-and-matrix composite,
consisting of a layered Bi5Ti3FeO15 (BTFO) perovskite
matrix and nanoscale pillars of a ferrimagnetic spinel
CoFe2O4 (CFO), were used to study the effectiveness ofnanoscale strain-mediated elastic coupling. The main advantage of this approach is that it may be possible to develop
new types of multiferroics that can work close to room
temperature and do not contain lead.
A three-dimensional model of the composite materialis shown in Fig. 1(b), together with a surface electron
microscope image in Fig. 1(a). The pillars form spontaneously during thin film growth due to immiscibility of theperovskite and spinel phases and extend throughout the
thickness of the thin film, as shown in the cross-sectionaltransmission electron microscope image in Fig. 1c. Composition mapping shows nearly perfect segregation of Fe/Co and
Bi/Ti in pillars with an average diameter of about 50 nm.
From the point of view of achieving elastic multiferroic
coupling in a nanoscale composite, strain fields along thewalls of the nanopillars are critically important. The behavior
was analyzed by high-resolution electron microscopy, whichshowed that the nanostructure-matrix interface is heavily
strained. The strain relaxes gradually in the BTFO matrix,

Fig. 2. (a) Magnetization comparison of a pure BTFO matrix and the
BTFO/CFO nanocomposite film, showing the presence of ferromagnetism in the nanopillars. Inset shows the magnetization of a pure
CFO sample. (b) A ferroelectrically poled pattern on the surface of ananocomposite film, measured with a piezoresponse force microscope.

as illustrated by the red radial arrows in Fig. 1(b). Ferroelectric switching in the BTFO matrix material was studied by
piezoresponse force microscopy, showing that the polarization response depends on the volume fraction of nanopillars,reaching a maximum for a CFO volume of 35%. A bipolar
poling pattern for this sample is shown in Fig. 2(b). Analysis
showed the presence of both in-plane (ab plane) and out-ofplane (c-axis) polarization components, which is unusual forlayered bismuth perovskite ferroelectrics where the polarization direction is in the ab plane. Thermodynamic LandauGinzburg-Devonshire (LGD) calculations showed that this isa direct result of the strain fields surrounding the nanopillars
and may also be caused by the presence of shear domains
at pillar boundaries that are not perfectly c-axis oriented.
Magnetization analysis of the composites at 10 K showedthat the saturation magnetization of CFO is not significantly
affected by the 50 nm diameter of the nanopillars (Fig. 2a),reaching nearly the expected 4 µB/f.u. of bulk CFO.
The work showed that systematic strain control ispossible in spontaneously-formed nanopillar composites
consisting of a spinel ferromagnet and a perovskite ferroelectric. The piezoresponse analysis showed that the threedimensional nanoscale structuring and the associated strain
fields are critical for obtaining suitable polarization behavior
in the layered bismuth ferroelectrics. Work is now underway
to determine the multiferroic response in such nanocomposite systems.
Reference[1] A. Imai, X. Cheng, H. L. Xin, E. A. Eliseev, A. N. Morozovska,
S. V. Kalinin, R. Takahashi, M. Lippmaa, Y. Matsumoto, and
V. Nagarajan, ACS Nano 7, 11079 (2013).
Authorsa,bbcddA. Imai , X. Cheng, H. L. Xin , E. A, Eliseev , A. N. Morozovska,ef
S. V. Kalinin,
R.
Takahashi,
M.
Lippmaa,Y.
Matsumoto
,
and
b
V.
NagarajanaTokyo Institute of Technologyb
University of New South Walesc
Brookhaven
National LaboratorydNational Academy of Sciences of Ukrainee
Oak Ridge National Laboratoryf
Tohoku University

Fig. 1. (a) Scanning electron microscope image of the nanocomposite
film surface and (b) a three-dimensional model of the composite
material. The elastic strain field surrounding the nanopillars is marked
with red arrows. (c) Cross-sectional electron microscope image and (d)Co/Fe and (e) Bi/Ti EDS mapping images.

ISSP Activity Report 201337

Development of High Pressure, High Field
and Multi-Frequency ESR System
Using Hybrid Type Pressure Cell
T. Sakurai, H. Ohta, and Y. Uwatoko
Pressure has been recognized as one of the most important parameters to explore novel phenomena around thequantum critical point for quantum spin systems. As thehigh field and multi-frequency ESR is a powerful means tostudy quantum spin systems from the microscopic point ofview, it is very useful to introduce the parameter of pressure
to the ESR measurement. We developed the high pressure,high field and multi-frequency ESR apparatus by combining
the single-pass transmission type ESR apparatus using thepulsed high magnetic field up to 55 T and the unique piston
cylinder pressure cell previously [1]. The most characteristicfeature of this pressure cell is that all inner parts are made ofzirconium oxide which has relatively good transmittance ofelectromagnetic wave. It enables us to observe ESR underpressure. However, the pressure range is limited below 1
GPa at most because the single layer cylinder is used andits inner and outer diameters are 3 and 8 mm, respectively.
The limited sample space also affects the signal intensity.
The signal to noise ratio is not enough to study spin states indetail. Moreover, several compounds have been suggested tohave the critical pressures above 2 GPa recently [2]. Therefore, the new ESR apparatus which has higher pressure range
and sensitivity is required. In this study, we have developed
new ESR apparatus which uses the combination of thehybrid type pressure cell and the superconducting magnet to
improve these two points [3].
Figure 1 shows the newly developed pressure cell for
multi-frequency ESR measurement. The hybrid type cylinder
which consists of inner NiCrAl cylinder and outer CuBe
sleeve is used to achieve both larger sample space and higher
pressure range above 2 GPa. The inner and outer diametersof the cylinder are 5 and 28 mm, respectively. The innerparts are all made of zirconium oxide. We confirmed thatthe pressure can be generated over 2.5 GPa at low temperature. However, they are sometimes cracked when the load isapplied to generate the pressure over 2.5 GPa at low temperature. We have also developed new ESR apparatus using
cryogen free superconducting magnet with wide bore. Gunn
oscillator and backward wave oscillator which cover thefrequency region from 50 to 400 GHz are used as the lightsource. The ESR signal is detected by an InSb detector andFig. 2. Pressure dependence ESR spectra of CsCuCl3 for H||c at
105 GHz.

the signal is amplified by the lock-in technique. The larger
sample space and the use of the lock-in technique makethe sensitivity higher than previous apparatus successfully.
Figure 2 shows typical ESR spectra obtained by the developed high pressure ESR apparatus. CsCuCl3 is a well known
ABX3 type antiferromagnet with TN = 11 K. Figure 2 shows
the antiferromagnetic resonance of this compound obtained
at 4.2 K for H||c. It clearly shows that the resonance field
shifts to the higher field side as the pressure is increased.
This corresponds to the increase of the antiferromagnetic
gap on applying the pressure [4]. The maximum pressure
obtained in this measurement is 2.7 GPa as shown in Fig. 2.
This result also shows that this high pressure ESR apparatus
is promising tool to clarify the spin states of novel pressure
induced phenomenon for quantum spin system.
References[1] T. Sakurai et al., Rev. Sci. Instrum. 78, 065107 (2007).
[2] T. Sakurai et al., J. Phys. Conf. Ser. 150, 042171 (2009).
[3] K. Fujimoto et al., Appl. Magn. Reson. 44, 893 (2013).
[4] T. Sakurai et al., J. Phys. Conf. Ser. 215, 012184 (2010).
Author aaaT.
Sakurai , S. Okubo , H. Ohta , K. Matsubayashi, and Y. UwatokoaKobe University

One-Hundred-Million-Atom Electronic
Structure Calculations on the K Computer
T. HoshiFig. 1. Cut view of the hybrid type pressure cell for multi-frequency
ESR measurement. Red lines show the electromagnetic wave.

38

ISSP Activity Report 2013

In the current (peta-scale) or next generation (exa-scale)computational physics, a crucial issue is ‘ApplicationAlgorithm-Architecture co-design’ or inter-disciplinary
collaborations among physics, applied mathematics and thehigh-performance computation field.
Here we report that one-hundred-million atom (100-nmscale) electronic structure calculations were realized on the
K computer [1,2]. The methodologies were based on the
co-design. In particular, the novel iterative (Krylov-subspace)algorithms were constructed for the generalized shifted linear
equations ((zS-H)x=b), instead of the conventional generalized eigen-value equation (Hy=eSy) (See [3,4] and reference
therein). The methods give the real-space Green’s function,
instead of eigen states. These solvers were implemented in
our order-N calculation code ELSES (http://www.elses.jp/)
with modeled (tight-binding) systems based on ab initio

calculations. These solver algorithms are purely mathematicaland applicable to large-matrix problems in many computational physics fields beyond electronic structure calculations.
In Fig. 1, the calculations show high parallel efficiency(‘strong scaling’) with up to the full core calculations of the
K computer for one-hundred-million-atom (100-nm-scale)systems [1,2]. The calculated systems are amorphous-likeconjugated polymer (aCP), poly-(9,9 dioctyl-fluorene) with2
3
N=102,238,848 atoms and sp -sp nano-composite carbon
solid (NCCS) with N=103,219,200 atoms. The high parallel
efficiency stems not only from the fundamental mathematicaltheory but also from detailed techniques, such as programing
techniques for saving memory and communication costs anda parallel file I/O [4].
An application study with NCCS is picked out [4].
The study is an early-stage one on the formation processof the nano-polycrystalline diamond (NPD), a novel ultrahard material [5]. NPD is obtained by direct conversion
sintering process from graphite under high pressure and hightemperature and has characteristic 10-nm-scale lamellar-likestructures. NPD is of industrial importance for its extreme
hardness and strength and Sumitomo Electric Industries.
Ltd. began commercial production from 2012. Our simulation is motivated by the investigation of possible precursor
structures in the formation process of NPD and the struc2
tures should be nano-scale composites of sp (graphite-like)3

and sp (diamond-like) domains. Figure 2 shows the nanodomain analysis on the NCCS. The structure is a result of
our simulation. The π-type crystalline orbital Hamiltonian
population (πCOHP) analysis [4], an analysis method based2on the Green’s function, was used so as to distinguish the sp
3
and sp domains. The analysis clarifies shapes of domains
and structure of domain boundaries from huge electronic
structure data and gives theoretical foundations of thecomposite.
General future aspects are (i) large-scale calculation
methods for optical and transport properties and (ii) applications to various systems, such as organic materials.
The fundamental mathematical theory was constructedin the collaboration with applied mathematics researchers;
T. Sogabe (Aichi Prefectural University) and S.-L. Zhang(Nagoya University) [3]. The code for massive parallelism
was developed with the supercomputers, the systems B andC, at ISSP and the K computer was used in the research
proposals of hp120170, hp120280 and hp130052.
References[1] T. Hoshi et al., JPS Conf. Proc. 1, 016004 (2014).
[2] T. Hoshi et al., Proceedings of Science, in press (Preprint : http://
arxiv.org/abs/1402.7285/)[3] T. Hoshi et al., J. Phys.: Condens. Matter 21, 165502 (2012).
[4] T. Hoshi et al., J. Phys. Soc. Jpn. 82, 023710 (2013).
[5] T. Irifune et al., Nature 421, 599 (2003).
Author a,b
T.
Hoshi
a
Tottori
Universityb
JST-CREST

Rolled Lamellar Structure of Surfactant
Membranes Induced by Shear Flow
H. Shiba, H. Noguchi, and G. Gompper

Fig. 1. Benchmark for the parallel efficiency (‘strong scaling’) on the K
computer with one hundred million atoms. [1,2] The calculated systems
are amorphous-likeconjugated polymer (aCP), poly-(9,9 dioctyl23fluorene) and sp -sp nano-composite carbon solid (NCCS).

Fig. 2. Nano-domain analysis of NCCS visualized with the πCOHP [4].
The sp2 (graphite-like) and sp3 (diamond-like) domains are visualizedin (a), while only the sp2 domains are visualized in (b). A closeup of an
sp2- sp3 domain boundary is shown in (c).

Surfactant molecules in water self-assemble into various
structures such as micelles and bilayer membranes, whichdisplay a rich variety of rheological properties. It is known
that under shear flow, lamellar membranes can be oriented
parallel or perpendicular to the shear-gradient direction. Surprisingly, under high shear flow, the membranes
transform the planar lamellae to a closely-packed multilamellar vesicle structures, so-called the onion phase.
The onion radius is reversible and can be described by aunique decreasing function of the shear rate. Although thisonion phase was experimentally discovered 20 years ago,

Fig. 1. Snapshot of surfactant membranes in simple shear flow. (a) A
planar lamellae structure is formed at a low shear rate. (b) At a highshear rate, a rolled lamellar structure is formed perpendicularly to theflow direction. Top and bottom arrows represent the flow directions.
The membranes are viewed from the flow direction.

ISSP Activity Report 201339

the formation mechanism is not understood so far. Since
the onion size is in a micro meter scale, it is far beyond
applicable length scales for molecular simulations. Thus,
we employed a highly coarse-grained membrane model, ameshless-membrane model, in which a membrane particle
represents not a lipid molecule but a patch of the bilayer
membrane. The particles self-assemble into membranes via
multibody potential interactions.
At low shear rates, planar lamellae structures are formedat large membrane volume fractions (see Fig. 1a). At highshear rates, lamellar states exhibit undulation instability,
leading to rolled or cylindrical membrane shapes oriented
in the flow direction (see Fig. 1b). At even higher shear
rate, the planar lamellae structures are formed again. The
spatial symmetry and the structure factor of this rolled stateagree with those of intermediate states during lamellar-toonion transition measured by time-resolved small angle
neutron and X-ray scattering experiments. A cylindricalor wavy lamellar structure was speculated to be this intermediate structure, but could not be distinguished from thescattering pattern alone. Our simulation results revealed that
it is a rolled structure instead of regular cylindrical or wavy
structures. The planar membranes become unstable in theflow gradient direction so that the membranes are rolled inperpendicular to the flow direction. We have not reproduced
the onion structure itself. We will investigate the effects ofdefects and finite system size to pursue understanding of theonion phase.

0.42(2). So far no experimental study has been reported
because of absence of the model compound. Recently wefound that RCrGeO5 is a rare experimental realization of thespin-3/2 alternating spin chain. In this study we performed
inelastic neutron scattering experiments on the polycrystalline sample of YCrGeO5 to observe the magnetic excitationand to identify the spin Hamiltonian.
INS spectrums are shown in Figs. (a) and (b). The excitations are observed in the energy range of 8 meV ≤ ℏω ≤ 23
meV at 4.0 K and the intensity decreases with the increaseof Q. The intensity is suppressed at higher temperature of
199 K. The results mean that the observed excitations are
dominated by magnetic scattering. No excitation is observedat ℏω ≤ 8 meV and this reveals the existence of the spin
gap. The obtained powder INS spectrum was converted tothe one-dimensional S(q,ω) [5] as shown in Fig. (c). The
obtained profile was reproduced by empirical dispersion
formula ℏω = √ A2(sin k)2 + Δ2 with the parameters Δ =10 meV and A = 20 meV. Figure (d) shows the dynamical
structure factor calculated by DMRG with δ = 0.75 andΔ/J=1.1 and the calculation is consistent with the experiment.
The measured magnitude of the spin gap is Δ = 10 meV

Reference[1] H. Shiba, H. Noguchi, and G. Gompper, J. Chem. Phys. 139,014702 (2013).
AuthorsaH. Shiba, H. Noguchi, and G. Gomppera
Forschungszentrum Juelich

Neutron Scattering Study on Alternating
Spin-3/2 Chain Compound YCrGeO5
M. Hase, T. Masuda, and K. Kindo
Neutron scattering technique is known as a powerful tool
to probe the spin correlation in magnetic materials. Among
various types of neutron instruments the chopper spectrometer is designed particularly for collecting inelastic neutron
scattering (INS) spectrum. Combination of position sensitive
detectors and accumulative data-acquiring system leads to astate-of-art instrument for measuring the dynamical structure
factor S(q,ω). Neutron Scattering Laboratory operates theHigh Resolution Chopper (HRC) spectrometer installed in
J-PARC/MLF. The instrument covers the incident neutronenergy range 10 meV ≤ Ei ≤ 500 meV and the scattering
angle range 0.3º ≤ ψ ≤ 40º, which meets typical magnetic
scattering in most of magnetic materials. In this highlight
we introduce a recent study on an alternating spin-3/2 chain
compound by using the HRC spectrometer.
The phase diagrams of the alternating spin chain
systems for various magnitudes of spin were extensively
studied theoretically [1-4]. The model Hamiltonian is= JΣ i(1-(-1)iδ)Si.・Si+1. In case of spin-3/2 chain thespin alternation δ induces a spin gap at 0 < δ < 0.42(2) and0.42(2) < δ ≤ 1, and the ground state is non-magnetic singlet.
Tomonaga-Luttinger liquid (TTL) state exists at δ = 0 and

40

ISSP Activity Report 2013

Fig. 1. (a) Inelastic neutron scattering (INS) spectrum of YCrGeO5
at 4.0 K. (b) INS spectrum of YCrGeO5 at 199 K. (c) INS spectrum
converted to one-dimensional dynamical structure factor. (d) Calculated
dynamical structure factor by DMRG method.

and this leads to J = 11meV. By using these parameters themagnetic susceptibility was quantitatively reproduced. Thus
our study revealed that YCrGeO5 is the first experimental
realization of the spin-3/2 alternating spin chain.
As shown in Figs. (a) and (b) INS spectrum with highexperimental resolution can be efficiently collected by using
HRC spectrometer. Although the polycrystalline sample
form, one-dimensional S(q,ω) can be obtained by the elaborated analysis. Combination of chopper spectrometer andpolycrystalline sample will be a defacto standard in forthcoming era of neutron science.
References[1] Y. Kato and A. Tanaka, J. Phys. Soc. Jpn. 63, 1277 (1994).
[2] M. Kohno, M. Takahashi, and M. Hagiwara, Phys. Rev. B 57, 1046
(1998).
[3] M. Yajima and M. Takahashi, J. Phys. Soc. Jpn. 65, 39 (1996).
[4] S. Yamamoto, Phys. Rev. B 55, 3603 (1997).
[5] K. Tomiyasu, M. Fujita, A. I. Kolesnikov, R. I. Bewley, M. J. Bull,and S. M. Bennington, Appl. Phys. Lett. 94, 092502 (2009).
Authors abb
M. Hase , M. Soda, T. Masuda, aD. Kawana, T.Yokoo , S. Itoh ,A.
Matsuo,K.
Kindo,
and
M.
Kohno
a
National Institute for Materials Science (NIMS)bHigh Energy Accelerator Research Organization (KEK)

Detection of Berry’s Phase in a
Bulk Rashba Semiconductor
H. Murakawa, M. Tokunaga, and Y. Tokura
The geometrical information of the system parametercan be encoded in the wave function as a Berry’s phase andgoverns the system properties. In quantum systems, Berry’s
phase can be a source for various emergent phenomena.
Despite its ubiquity, there are few experimental observationsof Berry’s phase of bulk states. Here, we report detection of a
nontrivial π Berry’s phase in the bulk Rashba semiconductor
BiTeI via analysis of the Shubnikov-de Haas (SdH) effect.
BiTeI has a polar crystal structure made up of stacked
layers of bismuth (Bi), tellurium (Te) and iodine (I) atoms.
Because of the absence of inversion symmetry and thestrong polarity of the system, accompanied by the strong
spin-orbit interaction of Bi, an extremely large Rashba
spin splitting occurs in a bulk scale (Fig. 1A). As shown in
Fig. 1B, two coaxial spin polarized Fermi surfaces verging

Fig. 2. (A) Magnetoresistivity of BiTeI sample. (B) The oscillatorycomponent as a function of 1/B. (C) Landau index plot of the outerFermi. (inset) Magnified view around the intercept.

at Dirac point, namely, inner and outer Fermi surfaces (IFSand OFS, respectively) are formed. Theoretical prediction indicates that electrons on both FSs with the circularspin texture acquire π Berry’s phase (øB = π) and varies thesystem energy from the trivial case (øB = 0). Under magnetic
field, Landau levels in a Dirac system with øB = π locate at the
middle of those in a system with øB = 0. Thus, π Berry’s phasecan be detected as a π phase shift in quantum oscillation.
The extremely large Rashba spin splitting in BiTeI
has great advantages on observing the Berry’s phase.
The large ratio of the extremal cross-sectional areas (AN)of IFS and OFS enables the clear separation of the two
sets of SdH oscillations. Moreover, the giant Rashba
energy can dominate the Zeeman effect and preserve thecircular spin texture even in a high magnetic field region.
According to the Lifshitz-Onsager quantization rule,ANℏ/eB = 2π(n + 1/2 - øB/2π) = 2π(n + γ) , Berry’s phase
is obtained as an intercept value γ in the linear relation
between 1/B and Landau index number n. For precise
evaluation, observation of the SdH oscillation down tolower Landau level is important. Therefore, high-magnetic
field measurement with use of the non-destructive pulse
magnet can be a powerful tool. Figure 2A shows the SdH
oscillation from the OFS up to 56 T. We assign integer
indices to the ρxx peak positions in 1/B and half integer
indices to the ρxx valley positions (Fig. 2B). As shown in
Fig. 2C, the interpolation line has almost zero intercept (γ =1/2 – øB/2π = 0), confirming the existence of π Berry’s phasein the 3-dimensional Rashba semiconductor BiTeI.
Reference[1] H. Murakawa, M. S. Bahramy, M. Tokunaga, Y. Kohama, C. Bell,Y. Kaneko, N. Nagaosa, H. Y. Hwang, and Y. Tokura, Science 342,
1490 (2013).
AuthorsabcH. Murakawa, M. S. Bahramy, M. Tokunaga,
Y. Kohama,
C. Bell ,
a
a,b
a,c
a,b
Y.
Kaneko,N.
Nagaosa
,
H.Y.
Hwang
,
and
Y.
TokuraaRiken CEMSb
The University of Tokyoc
Stanford University

Fig. 1. (A) Energy band dispersion of the Rashba spin split band in
BiTeI. (B) The inner and outer Fermi surfaces and helical spin textures(arrows) in BiTeI.

ISSP Activity Report 201341

Discovery of Novel Phase of Solid
Oxygen in Ultrahigh Magnetic Fields
T. C. Kobayashi and Y. H. Matsuda
Molecular oxygen has the spin S = 1 and the relation
between the magnetic interaction and the crystal structure
has been attracting attention of material scientists for along time [1]. In the present work, we discovered a novel
phase of solid oxygen as a result of the first-order structural phase transition by applying an extraordinarily strong
magnetic field of up to 193 Tesla [2]. The change in the
crystal symmetry due to the rearrangement of O2 molecules
is strongly suggested, which can make the new oxygen phaseferromagnetic. Since all known seven phases of solid oxygen
have the antiferromagnetic nature, it is remarkable to obtain
ferromagnetic oxygen.
The magnetization and magneto-transmission measurements have been performed in ultrahigh fields using adestructive manner, the single-turn coil technique. The
magnetic field was applied in the α-phase of solid oxygen at
low temperatures (T < 24 K). As shown in Fig. 1, we foundthat the magnetization rapidly increased at around 125 T.
This is a clear evidence of the field-induced magnetic phasetransition. Since the magnetization process has the large
hysteresis, the transition is expected to be of first order.
Figure 2 shows the time dependence of the magnetic field
and two-dimensional magneto-transmission image. You can
see that something drastic happens at very high magnetic
fields. The field where this phenomenon is seen almost corresponds to the critical field of the magnetization jump shownin Fig. 1.
The structural phase transition along with the magnetictransition explains the experimental findings; the significant
increase of the light transmission is due to the reduction of
the classical light scattering at the domain boundaries. In thestrong magnetic field, the crystal structure becomes isotropic(cubic) from the anisotropic one (monoclinic). The origin of
the phase transition is suggested to be the rearrangement of
O2 molecules, which is driven by the change in the exchangeinteraction depending on the spatial arrangement of the O2
molecules.
The discovered novel phase is the eighth phase of solid
oxygen, which has the different geometry of O2 moleculesfrom other seven phases. The state-of-the-art high magnetic
field technique was essential in this discovery. Nowadays, inmaterials science, many treasures waiting for discovery are
expected at the frontier of extreme high field.
References[1] Y. A. Freiman, and H. J. Jodl, Phys. Rep. 401, 1 (2004) andreferences therein.
[2] T. Nomura, Y. H. Matsuda, S. Takeyama, A. Matsuo, K. Kindo,
J. L. Her, and T. C. Kobayashi, Phys. Rev. Lett., Editors’ Suggestion,(2014) in press.
AuthorsaT. C. Kobayashi , T. Nomura,Y. H. Matsuda, S. Takeyama, A. Matsuo,bK.
Kindo,andJ.
L. Hera
Okayama Universityb
Chang Gung University

Structure Determination of Silicene on
Ag(111) by Low-Energy Electron Diffraction
K. Kawahara, T. Shirasawa, and N. Takagi

Fig. 1. The magnetization curve in α-oxygen at 9 K up to 129 T.

Fig. 2. (a) The waveform of the pulsed magnetic field. (b) The
two-dimensional magneto-transmission image of α-oxygen.

42

ISSP Activity Report 2013

Silicene, a 2-dimensional honeycomb lattice of Si,
attracts much attention since it is predicted to acquire exotic
features such as massless Dirac fermions and high electron
mobility [1]. As the spin orbit coupling of Si is 1000 times
larger than that of C, silicene is one of the most interesting
candidates for 2-dimensional topological insulator [2]. In
addition, silicene should match with the current Si based
technology. These characteristics make silicene promising in
the next generation devices.
Several groups reported synthesis of silicene on Ag(111)[3-8]. Silicene forms 4×4 superstructure on the Ag(111)
surface [4-8]. On a fundamental question ‘Does 4×4 silicene
have Dirac fermions?’, the arguments conflict among the
research groups [4,7]. The electronic structure is connectedwith the atomic arrangement. Thus, by determining theatomic position, we can answer the above question. However,
the geometric structure of 4×4 silicene has not been established. Several groups proposed the structural models of 4×4
silicene based on the result of scanning tunneling microscopy(STM) [4-8]. The reasonable model is a buckled structuralmodel constructed by the STM and density functional theory(DFT) calculations [4-7]. In contrast, Feng et al. claimed
that the corner-hole like features observed in the STM image
are assigned to missing Si atoms and proposed a model inwhich hydrogen atoms terminate the dangling bonds of Si
atoms [8]. The discrepancy arises from that the STM image
is convolution of the geometric structure together with theelectronic density of states. Hence we cannot determine thepositions of the individual atoms in the 4x4 silicene only by

Observing Hot Carrier Distribution
in an n-type Epitaxial Graphene
on a SiC Substrate
H. Fukidome and I. Matsuda

Fig. 1. The top and side views of the best-fit structure of 4×4 silicene.
The side view is the cross section along the AA’. Green and blue balls
represent Si atoms. The green Si atoms are moved up to the vacuum.
White and Gray balls represent Ag atoms in the first and second layer,
respectively.

STM measurements.
Electron diffraction is one of the most reliable andpowerful techniques to determine the geometric structure.
We have determined the geometric structure of 4×4 siliceneby using low-energy electron diffraction [9]. We examined
the regularly-buckled silicene, the buckled structure where
six Si atoms are displaced and the structural model proposedby Feng et al. The optimized reliability factor (R-factor)of the buckled structure shown in Fig. 1 was 0.17. The
optimized R factor of the model proposed by Feng et al. [8]was 0.48. The buckled structural model as Fig. 1 reproduced
the experimental results very well. Figure 1 shows the top
and cross sectional views of the best-fit structural modelfor 4×4 silicene. The green Si atoms are displaced perpendicularly to the surface and silicene forms into a buckled
structure. The Si-Si bond lengths range from 2.29 to 2.31 Å,
which are shorter than that for the bulk diamond structure.
Substrate Ag atoms are displaced vertically at the interface.
The R-factor is 0.52 for the model without the displacement of Ag, indicating that the displacement of Ag atoms
is a key factor to determine the structure of 4×4 silicene.
The displacement of Ag also reflects the strong interaction
between silicene and Ag substrate, supporting the experimental results showing absence of the Dirac fermions [7].
In addition, the experimentally determined structure of 4×4
silicene matches quite well with that optimized by DFT
calculations [4,5]. Thus, the geometric structure of 4×4
silicene on Ag(111) was completely clarified.
References[1] S. Cahangirov et al., Phys. Rev. Lett. 102, 236804 (2009).
[2] M. Ezawa, Phys. Rev. Lett. 109, 055502 (2012).
[3] B. Lalmi et al.,Appl. Phys. Lett. 97, 223109 (2010).
[4] P. Vogt et al.,Phys. Rev. Lett. 108, 155501 (2012).
[5] C.-L. Lin et al., Appl. Phys. Express 5, 045802 (2012).
[6] R. Arafune et al., Surf. Sci. 608, 297 (2013).
[7] C.-L. Lin et al., Phys. Rev. Lett. 110, 076801 (2013).
[8] B. Feng et al., Nano Lett.12, 3507 (2012).
[9] K. Kawahara et al., Surf. Sci. 623, 25 (2014).
AuthorsabaK. Kawahara, T. Shirasawa,
R. Arafune , C.-L. Lin , T. Takahashi,aaM.
Kawai , and N. TakagiaThe University of Tokyob
IMANA-NIMS

A monolayer graphene is "supermaterial" that is thethinnest, lightest, and strongest material with ultrahighelectrical and thermal conductivity. Recently optical properties of the graphene have also attracted interests in the fieldof developing optoelectronic, plasmonic and nanophotonic
devices. However, detailed mechanisms of the photo-induced
phenomena of a graphene, such as the multiple carrier generation, have not been understood and, thus, the direct investigation of the non-equilibrium carrier dynamics has beenstrongly called for.
In the present research, we carried out femtoseconds(fs)time- and angle-resolved photoemission experiment toobserve the temporal variation of the Dirac electrons after the
optical pumping in real time. The measurement was carriedout using high-harmonic generation (HHG) laser system
based on the Ti:Sappire laser (hν=1.57 eV). Photon energy of
28.26 eV for the HHG laser pulse is generated by irradiating
the second harmonic laser pulses (hν =3.14 eV) at Ar gas
and it is high enough to cover the electron momentum of the
Dirac band at the K point in angle-resolved photoemission
measurement. The time-resolved data were obtained using
the pump (3.14 eV laser) and probe (HHG) method with arepetition rate of 1 kHz.
Figure 1(a) shows a series of angle-integrated spectra
taken with a laser pumping power of 2.5 mW at various
delay times. Dispersion of the Dirac bands, observed byangle-resolved photoemission at the K point, is shown in
the inset. With laser pumping (t=0), the photoemission
intensity of the upper Dirac band (UDB) decreases significantly while that of the lower Dirac band (LDB) remains
constant. Around the energy corresponding to the Fermi
energy, the spectral tail extends in energy. The slope of thespectral edge also becomes small. At each delay time, theFig. 1. (a) Comparison of the spectra at different delay times. The
experimental spectra were taken at a photon energy of 28.26 eV atvarious delay times with pumping laser irradiation (hν=3.14 eV). The
intensity variation for the UDB is clearly reproduced by the simulated
result (d) while the intensity for the LDB is unchanged. The inset
shows dispersion of the Dirac bands near the Fermi level (EF). The
upper Dirac band (UDB) and lower Dirac band (LDB) are labeled in
the figure and the Dirac Point (DP) is indicated by an arrow. (b)–(d)Simulation of energy spectra for two cases of Dirac free electrons. The
inset shows their two-dimensional band dispersion. (b) density of states,(c) Fermi–Dirac function, and (d) resulting spectra.

ISSP Activity Report 201343

raw experimental data, drawn with thin colored lines, arecurve-fitted with a function that is a product of density ofstates of graphene, Fig. 1 (b), and the Fermi-Dirac function,
Fig. 1(c). In the spectral simulation of Fig. 1 (d), the Fermiedge shows a peak-like structure, and the peak top shifts
toward higher binding energy at higher temperature. In
Fig. 1(a), the fitting results are drawn through raw experimental data with bold colored lines. The temporal evolution
in Fig. 1(a) is described by comparing it with the intensities
simulated in Fig. 1(d) , and it reflects the time evolution of
the electronic temperature, that is, the transient distributionof the hot carriers (electrons).
Reference[1] T. Someya, H. Fukidome, Y. Ishida, R. Yoshida, T. Iimori,R. Yukawa, K. Akikubo, Sh. Yamamoto, S. Yamamoto, T. Yamamoto,T. Kanai, K. Funakubo, M. Suemitsu, J. Itatani, F. Komori, S. Shin, andI. Matsuda, Appl. Phys. Lett. 104, 161103 (2014).
Authors
I. Matsuda, H. Fukidomea, J. Itatani, S. Shin, and F. KomoriaTohoku University

Electronic Structure of Carbon-Related
Catalysts During Fuel Cell Operation by
Soft X-Ray Emission Spectroscopy
H. Niwa, Y. Harada, and M. Oshima
Polymer electrolyte fuel cells (PEFCs) are expected to bepromising power sources of high efficiency, low operating
temperature, and low pollution for transportation andresidential applications. Recently, carbon-based catalysts
are getting considerable attention since adequately designed
carbon-based catalysts show high ORR activities and are
expected to be cathode catalysts alternative to conventional
Pt-based catalysts [1,2]. The origin of their high ORR activities should be elucidated to further enhance the activities forcommercialization. Previous electronic structure studies oncarbon-based catalysts were mostly done at ex situ condition[3]. However, the results were not always conclusive
because they did not observe the chemical state of eachelement under PEFC working condition. To further explore
the ORR mechanism of carbon-based cathode catalysts,

Fig. 2. Smoothed Fe 2p SXE spectra compared with the open circuit
voltage (lower panel) and the same gas condition (upper panel). Blacksolid lines are difference spectra.

operando observation of the electronic structure is strongly
required.
Here we report a novel electrochemical cell systemdeveloped for operando soft X-ray emission spectroscopyof cathode catalysts for polymer electrolyte fuel cells at
BL07LSU of SPring-8[4]. Incorporating a membraneelectrode assembly on a vacuum compatible flange(Fig. 1), the system enables direct observation of elementspecific electronic structure that changes with gaseousand potential conditions for electrochemical reaction. We
have successfully observed the electronic structure of ironin the iron phthalocyanine-based cathode catalyst undervarious working conditions by the operando soft X-ray
emission spectroscopy. At open circuit voltage it is foundthat an oxidized iron site exists even after reductive hightemperature pyrolysis and is active for oxygen adsorption(Fig. 2), which is not expected from ex situ results for
powder samples where metallic iron site inactive for ORR
dominates.
References[1] W. Y. Wong, W. R.W. Daud, A. B. Mohamad, A. A. H. Kadhum,
E. H. Majlan, and K. S. Loh, Diam. Relat. Mater. 22, 12 (2012).
[2] F. Jaouen, E. Proietti, M. Lefèvre, R. Chenitz, J.-P. Dodelet, G. Wu,
H. T. Chung, C. M. Johnston, and P. Zelenay, Ene. Environ. Sci. 4, 114(2011).
[3] U. I. Kramm, I. Abs-Wurmbach, I. Herrmann-Geppert, J. Radnik,
S. Fiechter, and P. Bogdanoff, J. Electrochem. Soc. 158, B69 (2011).
[4] H. Niwa, H. Kiuchi , J. Miyawaki, Y. Harada, M. Oshima, Y. Nabae,
and T. Aoki, Electrochem. Commun. 35, 57 (2013).
Authorsaab
H. Niwa, H.c Kiuchi , J. Miyawaki, Y. Harada, M. Oshima , Y. Nabae ,
and
T.
Aoki
a
The University of Tokyob
Tokyo Institute of TechnologycToshiba Fuel Cell Power Systems Corporation

Clarification of Mechanism of
Ferromagnetism inFerromagnetic Semiconductor
M. Kobayashi, A. Tanaka, and Y. HaradaFig. 1. (a) Schematic view of the MEA cell for operando SXE measurements. (b) Photograph of the MEA cell on a vacuum flange. (c) Photograph of a XYZ manipulator and a main chamber.

44

ISSP Activity Report 2013

A ferromagnetic semiconductor (FMS), in which ahost semiconductor is doped with a low concentration ofmagnetic ions, has attracted much attention in spintronics,
which exploits the properties of magnets for electronics

3+

states mainly consist of the Mn electronic configuration
5
6 2composed of the charge-transferred states (d L and d L ), in
5
which the ligand hole is weakly bound to the Mn 3d state(which can be explained by the magnetic polaron model:
2+
Fig. 2(b)), rather than the pure Mn state (which can be
explained by the Zener’s p-d exchange model: Fig. 2(a)). In
order to reproduce the experimental broadening of the Mn
d-d excitation, not only the (Gaussian) broadening by theenergy resolution but also the 0.5 eV Lorentzian broadening
is required. The additional Lorentzian broadening in the
RIXS spectra can be attributed to the lifetime broadening in
the final state of the RIXS process where fast decay of thed-d excitations to an electron-hole pair in the host valence
and conduction bands occurs because of the hybridization
between the Mn 3d orbital and the ligand band.
Fig. 1. Soft X-ray emission spectrumof GaMnAs and simulation
3+
results. The simulation result for Mn (red) is in good agreement withthe experimental spectrum (black).

indispensable in industry. These semiconductors have bothelectrical properties of a semiconductor and magnetic
properties of a doped magnetic element. Ga 1-xMn xAs(GaMnAs) is a typical ferromagnetic semiconductor obtainedby doping a small amount of manganese (Mn) into gallium
arsenide (GaAs). Its practical application as a spintronics
material is being examined because it exhibits ferromagnetism at a relatively high temperature. However, the mechanism of ferromagnetism in GaMnAs has not been conclusively determined, and various physical models have been
proposed.
In this study, to address the electronic structure of
the doped Mn ions, we report the results of Mn L3 x-ray
absorption spectroscopy (XAS) and resonant inelastic x-ray
scattering (RIXS) measurements of Ga1−xMnxAs (x = 0.04)
at SPring-8 BL23SU and BL07LSU [1], respectively. RIXS
is a powerful tool to investigate electronic excitations inelement- and symmetry-specific ways including d-d andcharge-transfer (CT) excitations for open shell 3d orbitals[2], and magnetic excitations for spin or charge-orderedsystems [3]. These excitations are sensitive to electron correlation, crystalline symmetry, and the strength of hybridization with the ligand band. The RIXS spectra obtained for
Ga1−xMnxAs are compared with configuration-interaction(CI) cluster-model calculations [4], and the electronic structure parameters are estimated.
The obtained XAS spectrum was compared with the
CI cluster model calculations. Both the calculated spectra2+3+
for the Mn and Mn states well reproduce the experimental XAS spectrum and we cannot determine the effective
charge on the Mn site. On the other hand, the RIXS spectra
provide definitive information: the RIXS spectra in Fig. 1
show a broad profile even at energy resolutions high enoughto distinguish individual d-d excitation peaks of MnO. An
analysis by the CI calculations indicates that the Mn groundFig. 2. Models for mechanism of ferromagnetism in Ga1-xMnxAs: (a)Zener's p-d exchange model and (b) magnetic polaron model. The
direction of the arrows in the upper figure indicates the direction ofmagnets.

References[1] G. Ghiringhelli, M. Matsubara, C. Dallera, F. Fracassi,
A. Tagliaferri, N. B. Brookes, A. Kotani, and L. Braicovich, Phys. Rev.
B 73, 035111 (2006).
[2] M. L. Tacon, G. Ghiringhelli, J. Chaloupka, M. M. Sala,
V. Hinkov, M. W. Haverkort, M. Minola, M. Bakr, K. J. Zhou,
S. Blanco-Canosa, C. Monney, Y. T. Song, G. L. Sun, C. T. Lin,G. M. D. Luca, M. Salluzzo, G. Khaliullin, T. Schmitt, L. Braicovich,and B. Keimer, Nat. Phys. 7, 725 (2011).
[3] A. Tanaka and T. Jo, J. Phys. Soc. Jpn. 63, 2788 (1994).
Authorsaabac
M. Kobayashi, H.d Niwa , Y.a Takeda , aA. Fujimoria, Y. Senba , H.
c
Ohashi , A.a Tanaka , S. Ohya , P. N. Hai , M. Tanaka , Y. Harada, andM.
Oshimaa
The University of TokyobJapan Atomic Energy AgencycJapan Synchrotron Radiation Research Institute (JASRI)dHiroshima University

Selective Probing of the OH or OD
Stretch Vibrations in Liquid Water Using
Resonant Inelastic Soft X-ray Scattering
Y. Harada, T. Tokushima, and S. Shin
The unique property of water, such as high boilingand melting point compared to molecules like non-metal
hydride, or less density in solid form than in liquid form, areFig. 1. The water vibronic structure observed in the RIXS spectrum.
Dotted red curve is a standard Raman spectrum of liquid water in thesame experimental configuration x(y, x+z)y [2] as the O 1s RIXS.

ISSP Activity Report 201345

M. Kobayashi, M. Oshima, Y. Senba, H. Ohashi, K. T. Wikfeldt, A.
Nilsson, L. G. M. Pettersson, S. Shin, Phys. Rev. Lett. 111, 193001(2013).
[2] G. E. Walrafen, M. S. Hokmabadi, and W.-H. Yang, J. Chem. Phys.
85, 6964 (1986).
[3] J.D. Smith, C. D. Cappa, K. R. Wilson, R. C. Cohen, P. L. Geissler,
R. J. Saykally, Proc. National Acad. Sci. (USA) 102, 14171 (2005).
[4] Y. Nagata, R.E. Pool, E.H.G. Backus, M. Bonn, Phys. Rev. Lett.
109, 226101 (2012).
AuthorsabcY. Harada, T.c Tokushima ,c Y. Horikawa,O. Takahashi, H. Niwae,f,ddM. Kobayashi,
M.
Oshima
,
Y.
Senba
,
H.
Ohashi,K.
T.
Wikfeldt,
g,hhA.
Nilsson,L.
G.
M.
Pettersson
,
and
S.
Shin
a
RIKEN/SPring-8b
Hiroshima Universityc
The University of Tokyod
JASRI/SPring-8eUniversity of Icelandf
NORDITA, AlbaNova University Centerg
SLAC National Accelerator Laboratoryh
AlbaNova University Center, Stockholm University
Fig. 2. Isotope effect on the multiple vibrational excitations of water.
For each spectrum the background level is indicated by a dashed line.
The extracted HDO spectrum is fitted with a linear combination of the
H2O and D2O spectra in the range from 531–534 eV.

explained by an attractive force between water molecules,
called 'hydrogen bond'. There are many proposed local structural models that describe the water network. Among them,a continuum model, where hydrogen bonds in water are
distorted, broken and reformed continuously, but water itself
is composed of a single component, or a mixture (microheterogeneity) model, where the network is considered asa mixture of various hydrogen bond configurations, arewell known. However, the model that describes better thehydrogen bond property of liquid water, is still under debate.
In this work, we have succeeded in revealing validity ofthe mixture (micro-heterogeneity) model by selective observation of hydrogen-bond-broken water molecules and in
detecting with high sensitivity the difference in the degreeof hydrogen bond strength between light (normal) waterand heavy water (in which both hydrogen atoms have been
replaced with deuterium) using soft X-ray resonant inelastic
scattering at BL07LSU and BL17SU of SPring-8[1]. Highresolution O 1s resonant inelastic X-ray scattering spectraof liquid H2O/D2O/HDO, obtained by excitation near the
pre-edge resonance (Fig. 1) show, in the elastic line region,
well-separated multiple vibrational structures corresponding
to the internal OH stretch vibration in the ground state ofwater. The energy of the first-order vibrational excitation isstrongly blue-shifted with respect to the main band in the
Infrared/Raman spectra of water [2], indicating that watermolecules with a highly weakened or broken donatinghydrogen bond are correlated with the pre-edge structure in
the X-ray absorption spectrum. As shown in Fig. 2, the vibrational profile of pre-edge excited HDO water is well fittedwith 50±20% greater OH-stretch contribution compared to
OD, which strongly supports a preference for OH being theweakened or broken H-bond in agreement with the wellknown picture that D2O makes stronger H-bonds than H2O[3,4]. Accompanying path-integral molecular dynamics
simulations show that this is particularly the case for strongly
asymmetrically H-bonded molecules, i.e. those that are
selected by pre-edge excitation. These results are expected
to lead to the clarification of the role of water in various
chemical and catalytic reactions as well as water in biological organisms where hydrogen bond plays an important role.
References[1] Y. Harada, T. Tokushima, Y. Horikawa, O. Takahashi, H. Niwa,

46

ISSP Activity Report 2013

ISSP Activity Report 201347

International Conferences and Workshops
Emergent Quantum Phases in Condensed Matter– from topological to first-principles approaches (EQPCM2013)

June 3-21, 2013
H. Aoki, R. Arita, S. Fujimoto, M. Imada, S. Onoda, Y. Tada ,Y. Takada, and M. Oshikawa

In condensed matter theory, a variety of collective phenomena emerging in real materials are often explained or predicted
first in terms of effective models, and then the description is made more precise with first-principles calculations based on
the ab initio Hamiltonian. These two approaches require different backgrounds and are in many instances pursued separately.
However, given the rapid progress in the both approaches and a rich variety of novel quantum phenomena found in recent years,
bridging between the two is important more than ever. This Workshop/Symposium was organized in order to facilitate such an
exchange with interactions among active theorists with diverse backgrounds.
During the Symposium period (June 12-14, 2013), results from the frontline of research, including experimental works,
were reported in 33 talks and 47 poster presentations. The “hot” topics at the Symposium included Skyrmions in magnetic
materials, transport in topological insulators, electron correlations in topological insulators, quantum spin ice, quantum spin
liquids, and quantum entanglements in topological phases. The cumulative total attendance of the three-day symposium reached351, indicating the success in attracting people from different fields.
The rest of the program was designated as the Workshop period. Typically, each day of the Workshop started with a
90-minute pedagogical lecture in the morning, followed by two 30-minute talks in the afternoon mostly by junior scientists.
This format was conceived in order to stimulate exchanges among scientists with different backgrounds, and to encourage
junior scientists. In fact, the ample free time between and after the talks was filled with lively informal discussions. During theWorkshop period, there were 14 pedagogical lectures and 20 30-minute talks. The pedagogical lectures reviewed fundamentals
of current topics and covered both effective-model based and first-principles approaches. They were particularly useful for theparticipants to become acquainted with unfamiliar concepts and methods. The
30-minute talks by junior scientists were of surprisingly high quality, demonstrating the high standards of young generation in the emerging fields.
This Workshop/Symposium was sponsored by ISSP, as well as Computational Materials Science Initiative of Japan, Elements Strategy Initiative Center for Magnetic Materials, Grant-in-Aid for Scientific Researchon Innovative Areas “Topological Quantum Phenomena in Condensed
Matter with Broken Symmetries”, and Institute for Complex Adaptive
Matter (ICAM-I2CAM, NSF Grant DMR-0844115). The program andother details of the Workshop/Symposium can be found at the web page
http://www.issp.u-tokyo.ac.jp/public/EQPCM/

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ISSP Activity Report 2013

The 2nd DYCE-Asia and ISSP-international Workshop on Life Science and Photonics
December 17-18, 2013
H. Akiyama and H. Yokoyama
As the first ISSP international workshop on life science, the 2nd DYCE-ASIA workshop on “Life Science and Photonics”
was held at Media Hall, Kashiwa Library, in Kashiwa Campus of The University of Tokyo. It was planned as an interdisciplinary scientist meeting of life scientists, physicists, and semiconductor photonics engineers. In this workshop, interesting
recent topics including (1) bio-imaging for science and medical applications, (2) spectroscopy of bio-related materials, and(3) bioluminescence science and applications, were presented. About 60 people attended the workshop, including invited 15
speakers mainly from Asia-Pacific economies. Each speaker gave plain introduction to non-specialist audiences.
Life science and photonics are both very rapidly growing fields in this century, and we need to enhance mutual understanding and interactions among scientists in these fields. Moreover, these fields should lead near-future economy growth.
Indeed, industrial developments related to photonics science are recently very active particularly in Asia-Pacific economies/
countries. Therefore, this workshop was organized as the 2nd DYCE-ASIA workshop: DYCE (Optical science of dynamically-correlated electrons in semiconductors) was the title of a joint-research program from November 2008 to March 2013,
supported via KAKENHI, or Grants-in-Aid for Scientific Research on Innovative Areas, by MEXT, Japan. The DYCE-ASIA
workshop was started in order to extend the domestic DYCE research in Japan to Asian and international economies/countries.
The 2nd DYCE-ASIA workshop was officially supported by and organized as a project of Asia-Pacific Economic Cooperation (APEC), because the above-mentioned aims of the DYCE-ASIA workshop exactly match the goals of Policy Partnershipon Science, Technology and Innovation (PPSTI) in APEC. This workshop was financially supported by KAKENHI grant (No.
20104001) and ISSP.
We got many thankful comments from foreign attendants as shown below.
— Thank you for the excellent work organizing the II DYCE and hosting at Todai. The workshop was very well organized
and interesting. As for me, I had the opportunity to present my work and see and discuss the work of other researchers interested in solving the mechanism of bioluminescence colors. I also had the opportunity to see other interesting works aboutbio-photonics, of special interest were the technologies dealing with fluorescence imaging and microscopy, and to interact withresearchers from other areas. Finally, I wish to thank the opportunity to see state of the art laser technologies in your labs. I
hope in the near future to host a workshop or advanced school of bioluminescence in Brazil.
— Thank you so much indeed for the invitation. I enjoyed taking part in the Workshop. I love Japan very much and I amvery happy every time visiting your so nice and beautiful country. As for the Workshop, I believe that the in general its quality
was good. It was helpful in many senses (for me, at least). The program was interesting, the quality of presentations was fine,the number of participants was about right. The minor problem for me was the accommodation. The air conditioner (the heater)
in my room was awful. Very noisy and without auto temperature control. I hope that the University will replace air conditioners
for modern ones in the near future. Anyway, I enjoyed very my visiting you and hope to see you soon.
— The workshop was extremely well organized. All the invited speakers are very knowledgeable and they are in the topof their scientific fields. I tremendously learnt a lot from these 2 days workshop. Very focused topics! The poster session has
also brought a different flavor to the workshop as we had more time to scientifically discuss with each individual. My overall
impression is very positive about the work and I would love to participate in the next DYCE if possible. Please keep up thegood work.
— Many thanks for your organizing such a wonderful event. I have been back to Taipei on last Thursday. Please kindly
consider the development of 1300 nm femtosecond laser light, which would be very useful for clinical imaging.
— Thanks for your nice organization and warm hospitality during the 2nd DYCE-Asia. The topic of "Life Science andPhotons" is very interesting and reflects the hot application trend of laser technologies. Although the conference is of a small

ISSP Activity Report 201349

scale, it attracts the most important researchers in this field and in the world. Such a conference is definitely important to Asia
researchers. I enjoyed it very much. I think such a topic-limited conference is very good and should be continued in the future.
— I'd like to thank you again for your kind arrangement of the 2nd DYCE workshop and the lab tour, and the nice dinner
for six of us together. As a beginner, I learned a lot from our speakers about life science /firefly and the status of 1300nm
microscopy. I discussed with several DYCE members and possibly some further collaboration work in the near future. I think(at least for Taiwanese participants): we can cover the air fees to Japan to reduce the financial loading of the DYCE program.
The guest house at U. Tokyo is very nice and convenient. Thank you for everything.
— I would like to thank you for the kind invitation and the warm welcome in the University of Tokyo. It was great meeting
you and the other colleagues that work on bioluminescence. I would like to reiterate that I am very interested in starting collaboration with your group. I will re-read your latest excellent publications and I will come up with some proposals on how we cancomplement our expertise.
— Overall, the symposium is of very high quality and efficient. A collection of frontier technologies, results, and ideas ispresented in the symposium. The results on bioluminescence are particularly interesting. It reflects the outreaching effort ofthe excellent team. The team and related scholars have achieved tremendously in various photonics technologies, especially on
novel light sources. As shown in the abstract book, the topics are well selected. The participating scholars also did a great job
in presenting their work. The meeting venue is located in the library and next to on-campus cafeteria. The arrangement is verypractical and efficient. The lab tour is rather impressive. It takes resources, intelligent and dedicated scholars, creativity andrelentless efforts to build up such a world class laboratory, as shown in the tour. It shows Japan can definitely lead the worldin realizing frontier ideas with cutting edge technologies. Last, but not the least, the interaction among the participants is most
warming and rekindling. Behind the excellent works, there are so many details that are often left out from the official presentation. The coffee breaks and the get-together lunches and dinners nicely fill the gap on behind the scene stories and allow thebuilding of friendship. In the next workshop, participation of more graduate students is highly encouraged. The logistics is also
excellently done, simple and effective.

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ISSP Activity Report 2013

ISSP Activity Report 201351

ISSP Workshops
Future Research of Material Science Using Vacuum-Ultraviolet and Soft X-ray
Synchrotron LightMay 28-29, 2013
J. Fujimori, T. Kinoshita, K. Amamiya, T. Okuda, S. Shin, J. Yoshinobu, and F. Komori
Vacuum-ultraviolet and soft X-ray beamlines have been updated in the synchrotron light facilities in Japan including
SPring-8 and Photon Factory. In the end stations of these beamlines, advanced techniques for the studies of new materials are
now available by the improvement of polarization control and expansion of wavelength range with high energy resolution, andso on. Using these, we can expect more precise and quantitative measurements for studying new properties of the materials.
However, the synchrotron radiation facilities have lacked enough opportunities to share information on their individual development plan. This is not ideal for the present trend in the research of solid state physics that a target material is intensively investigated by several complimentary methods for the thoroughunderstanding of its properties and functionalities throughcooperative research. In this workshop, there were reports on
the current status and future plan of each synchrotron radiation facility in Japan and on the recent results at the advanced
beamlines including some of the oversea facilities as well as on
the plan of Tohoku medium-size synchrotron radiation facility.
Based on these reports, we discussed the future research using
vacuum-ultraviolet and soft X-ray synchrotron light. The
workshop provided an important opportunity for the community of this research area that the beamline scientists from all
the facilities and active users in Japan intensively discussed thefuture of their research field together.

Energent Quantum Phases in Condensed Matter (EQPCM2013)
June 12-14, 2013
Y. Takada and M. Oshikawa
This ISSP workshop was held as the symposium part of the international workshop of the same title. See the section of“International Conferences and Workshops”.

52

ISSP Activity Report 2013

Polar Oxides for Energy Conversion
June 26, 2013
M. Lippmaa, Y. Matsumoto, and I. Takeuchi
The focus of this workshop was on new oxide materials related to energy conversion applications. In particular, new typesof polar oxides may offer a way to design internal electric field gradients in oxide heterostructures for achieving efficient photocarrier separation. In addition to basic solar cell geometries, thedesire is to use functional oxides that fulfill two roles simultaneously, harvesting solar light by photocarrier generation andcatalytically enhancing photoelectrochemical reactions on thesurface. The presentations covered a broad range of related
topics: catalytic materials, synthesis techniques, surface analysis,
crystal design, phase transition mechanisms, and microstructural analysis. About 40 people attended the workshop, most ofwhom are young researchers. The event was thus a good venue
for in-depth discussions on new materials and new ideas on oxidematerials design. Two longer invited talks gave the attendees achance to think about more general materials lifecycle issues andto see a practical example how new materials, in this case thermoelastic alloys, transition from pure basic science research to an
actual application.

Extreme High Magnetic Field Science: Towards Fusion of Field, Materials and Probe
October 30-November 1, 2013
K. Kindo, H. Ota, T. Sasaki, T. Shimizu, S. Takeyama, M. Tokunaga, H. Nojiri,
M. Hagiwara, Y. Hosokoshi, Y. H. Matsuda, M. Yoshizawa, and S. Mitsudo
Recently, large high-magnetic field laboratories have been built in many countries all over the world. Progress in thelast decade on both generation- and measurement-techniques makes it possible to carry out various experiments under highmagnetic fields. New development of materials science has started, as well, such as a fusion of high field with other fields (e.g.
synchrotron radiation light source or laser). A fusion of high magnetic field, new materials and probe is required to develop
an advanced research on materials science for the next decade. High
Magnetic Field Co-laboratory Project also contributes to the progress ofhigh field science. The project was planned to connect Japanese large highfield laboratories strongly and has been realized partially. An exchangeof researcher has been promoted in accordance with the project. This
workshop was held to discuss the issues noted below.
1) Search for a new research subject for the next decade and trainingof young researchers2) Development of research subject fused with other fields
3) Complete realization of High Magnetic Field Co-laboratory Project
The three issues were discussed not only by the high field laboratories but also by the users community. It was very significant for the highfield community that all researchers concerned with high field gathered
together to discuss the above issues and exchange recent information.

ISSP Activity Report 201353

Materials and Physical Sciences Related to Energy and Environment
November 11-13, 2013
H. Mori, K. Kanoda, T. Sasaki, J. Takeya, F. Komori, M. Shibayama, J. Yoshinobu,
O. Yamamuro, H. Akiyama, O. Sugino, Y. Harada, and M. Lippmaa
After the 2011 Tohoku earthquake, the scientific studies towards energy conversion and green environment have been extensively carried out. This workshop has focused on fundamental researches of novel materials and physical sciences related toenergy and environment.
The energy conversion system and recent novel materials have hierarchical structures. For example, solar cell is a complex
system, composed of synthetic molecules, charge transfer pairs, p-n interface, semiconducting layers, and buttery device. As
attractive soft material, ionic liquid is also a hierarchical system with nano-meso-micro correlation lengths. The scientifickeywords of these systems are “multi-energy scale”, “dynamic structure”, and “excited state”. Therefore, it is important to perform researches
integratedly.
In this workshop, the active 39 researchers have afforded 30-min.
keynotes and 20-min. oral presentations in the sessions of “solar
cell · artificial photosynthesis”, “photo-catalyst”, “battery”, “surface
science”, “molecular materials · organic electronics”, “bio-materials”,
and “hydrogen-based-materials”. The 24 graduate students and young
researchers have presented their researches in the poster session. Totally,
198 participants for 3 days participated in the workshop with hot discussions. It is meaningful that prominent researchers in a wide range ofscientific fields presented their cutting-edge research results and exchange
their information.

Condensed Matter Physics under Pulsed Ultrahigh Pressures and Magnetic Fields
November 25-26, 2013
K. G. Nakamura, T. Suemoto, N. Sarukura, S. Koshihara, H. Noziri, and M. Yoshimura
Ultrahigh pressures (>1TPa) and magnetic fields (>1kT) are recently realized by using a high-power laser, and electronicand structure dynamics in condensed matter can be studied under these extreme conditions. In this symposium, we discussed
generation techniques of such extreme fields, current research activities, and future topics. The symposium consisted ofsessions on (1) physics under strong magnetic fields, (2) physics under ultrahigh pressures, and (3) ultrafast measurements,
with seventeen presentations. On the topics (1) there were presentations of a recent generation technique of the kT magnetic
field using high-power laser plasma and measurements with synchrotron radiation, laser, and neutron diffraction under pulsed
magnetic fields. On the topics (2), the generation of laser-induced ultrahigh pressures over TPa, which cannot be accessed bystatic compression, and combination research works
with X rays from XFEL (X-ray Free Electron Laser)
were presented. In addition, studies on planetaryscience using shock-induced high pressures were alsopresented. On the topics (3), single-shot measurement
techniques are presented to study ultrafast phenomenausing laser combined with pulsed electrons and X rays.
Throughout the symposium, we discussed the problemsof pulsed high pressure and magnetic fields and potential for studying unique properties of materials under
non-equilibrium conditions.

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ISSP Activity Report 2013

Local Symmetry Breaking and Quantum Properties in Strongly Correlated Electron Systems
November 27-29, 2013
T. Arima, H. Harima, S. Nakatsuji, and Z. Hiroi
Symmetry is one of the most important concepts to determine the physical properties of solid states. For example, many
interesting phenomena such as unconventional superconductivity, multiferroicity, and spin Hall effect are relevant to thebreaking of the global space-inversion symmetry and resultant antisymmetric spin-orbit interaction. The antisymmetric spinorbit interaction can be activated at non-centrosymmetric atomic sites even in materials with global space inversion symmetry.
At such non-centrosymmetric sites, an odd-parity ligand field also allows the emergence of odd-parity multipoles like magnetic
quadrupole and electric octupole moments, which may open the door to new paradigms in material science.
This workshop was organized to shed light on the possible exotic properties induced by the breaking of local inversion symmetry coupled with the electron correlation and spin-orbit coupling. During the workshop, off-diagonal responses,
quantum transport, and exotic superconductivity
were intensively discussed in terms of multipoles.
In particular, many itinerant systems hosting thedegree-of-freedom of various multipole moments
were intensively discussed. The number ofparticipants reached 87, consisting of researchers
in the fields of 4f-electron systems (rare-earth
compounds), 5f systems (uranium compounds), andd-electron systems (transition-metal compounds).
The discussions across the various communities
in solid state science made the workshop very
successful.

Joint Research Meeting of ISSP Supercomputer Joint Use and CMSI Annual Activity
Report 2013

December 10-13, 2013
H. Akai, N. Kawashima, O. Sugino, S. Todo, H. Noguchi, T. Oguchi, A. Oshiyama, T. Kawakatsu,
S. Tsuneyuki, N. Hatano, S. Kasamatsu, H. Watanabe, Y. Noguchi, H. Shiba, and S. Morita

Every year, we hold a workshop for the joint research of the ISSP supercomputers. This year, the meeting was co-organizedwith The Computational Materials Science Initiative (CMSI), of which ISSP is the headquarters. During the four days of themeeting, we had 58 oral presentations, and 49 poster presentations. 192 scientists participated. The subjects of the presentations ranged from the most fundamental low-temperature behaviors of quantum matters to semi-conductor device, and newenergy resources. We invited five distinguished speakers: K. Nakajima (U. Tokyo), Z. Hiroi (ISSP), K. Hukushima (U. Tokyo),
M. Kato (Tokyo Inst. Tech.) and Y. Oyanagi (Kobe Univ.). We had active discussions for oral and poster presentations. The
results of questionnaire on ISSP supercomputer were also presented and supercomputer architectures suitable to computational
material science were discussed. The following three people are presented awards.
Young Researcher Encouragement Award: Kazuya Ishimura (Institute for Molecular Science).
Visual Award: Takuma Yagasaki (Okayama University).
Poster Award: Hiroshi Watanabe (Institute for Solid State Physics).

ISSP Activity Report 2013

55

Joint Researches in Foreign Neutron Facilities

January 29-30, 2014
T. Masuda, M. Shibayama, H. Yoshizawa, and O. Yamamuro

Since the Great East Japan Earthquake on 11th March in 2011, Japan Research Reactor (JRR3) has suspended its operation and the Neutron Scattering Laboratory (NSL) has had difficulty in the domestic joint research using neutron spectrometers
installed in JRR3. Now the NSL provides the neutron users the travel budgets for the neutron experiments at foreign facilities
and supports the joint researches. In this workshop the users presented and discussed the researches performed at the foreign
facilities. The field covers wide range including magnetism, strongly correlated electrons, glass, and soft matter. As for magnetism, the topics on geometrically frustrated systems were focused; the complex magnetic structure in chiral magnet, novel
magnetic phase in quantum spin ice, the interplay between magnetic structure and electric polarization in multiferroics, etc.
As for strongly correlated electrons system, studies on magnetic excitations and structures in various types of superconductors
including high-Tc Cu oxides, Fe pnictides, and heavy-fermion
materials were presented. It should be noted that the development and application of high pressure cell were implemented
even in the restricted machine time at foreign facilities. Structural and dynamical analyses on new materials in the field ofsoft matter and quasi-elastic scatterings on cluster structure
and ion liquid in the field of glass were reported. With 25 talks
and 17 posters, the discussions at the workshop were hot andfruitful, indicating the scientists in the field of neutron scattering
are actively doing their research and even enjoying this hardsituation.

Present Activity and Future Prospect of BL07LSU in SPring-8

February 19, 2014
S. Shin, F. Komori, I. Matsuda, and Y. Harada

Five years has passed since the University of Tokyo started constructing an undulator beamline BL07LSU in SPring-8, and
it is the middle of the project period using exclusively the beamline for joint studies. Polarization-controlled high-brilliancelight is now available in the beamline, and used for advanced spectroscopy at the end-stations for material science. The numberof publications from the beamline users has increased recently, and attracted much attention over the world. As a result, theoverseas researchers continuously apply their joint studies there, and more than 30 % of the beam time for the joint studies isused with the foreign collaborators at present. In this workshop, the present status of the undulator light and the recent results at
the end-stations were reported, and the advancement of the beamline in the next five years was discussed. In particular, future
use of the polarization switching was proposed in relation to the development of the variable-polarization undulator. For the
next two years, three long-term projects have been accepted at the three stationary end-stations for time-resolved spectroscopy,
three-dimensional nano ESCA and soft X-ray emission spectroscopy. Each research plan with common keywords of operando
and polarization control was introduced and discussed.
New research plans using the free port were presented as
well.

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ISSP Activity Report 2013

ISSP Activity Report 2013

57

58

ISSP Activity Report 2013
河江
村田
高橋
藤原
巨海
藤原
辺土
片野
糸井

AgPdCu 合金圧力セルを用いた磁場中比熱測定

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

磁性体の圧力効果

圧力下 NMR 測定法に関する開発

低温用マルチアンビル装置の開発

中性子回析に用いる圧力装置の開発

擬一次元有機物質の圧力下物性研究

4

5

6

7

8

9

10

11

12

充穂

進

正人

直樹

玄道

哲也

博樹

惠三

達也

林 伸彦

二次元超伝導の渦糸および近接効果に関する理
論研究

3

達也

良友

河江

柄木

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

3

幾何学的フラストレートした化合物の極低温磁
化測定

1

氏名

2

課題名

No.

嘱託研究員（Commission Researcher）

日本大学

埼玉大学

琉球大学

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

大阪府立大学

九州大学

琉球大学

Ultra low temperature measurements for geometricallyfrustrated materials

Title

Yoshitomo Karaki

Name

Development of multi-anvil apparatus for low temperature

医学部

Study on pressure induced superconductivity of quasi organic
conductor

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

理学部

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

Effect of pressure on the magnetic materials

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

Miho Itoi

Susumu Katano

Masato Hedo

Naoki Fujiwara

Gendo Oomi

Tetsuya Fujiwara

Hiroki Takahashi

Keizo Murata

大学院理学研究
Effect of pressure on the organic conductor科
Adjustment of cubic anvil apparatus

Tatsuya Kawae

大学院工学研究 Development of pressure cell for specific heat measurements
under magnetic field
院

文理学部

Nobuhiko Hayashi

ナノ科学・材料 Theoretical study on vortices in two-dimensional
superconductors
研究センター

大学院工学研究 Development of very low-temperature spin-polarized STM with
Tatsuya Kawae
a 3He-4He dilution refrigerator
院

教育学部

所属

平成 25 年度 共同利用課題一覧（前期） Joint Research List (2013 First Term)

Subjects of Joint Research

Nihon University

Saitama University

University of the
Ryukyus

Kyoto University

Kurume Institute ofTechnology

Yamaguchi University

Nihon University

Osaka City University

Kyushu University

Osaka Prefecture
University

Kyushu University

University of the
Ryukyus

Organization

ISSP Activity Report 2013

59

松浦 直人
桑原 慶太郎横山 淳
田崎 誠司

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

中性子分光器を用いた強相関電子系物質の微視的研究高度化した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
インの整備

26

27

28

29

大山 研司

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

22

松村 武

藤田 全基

中性子散乱装置のアップグレードと共同利用研
究の推進

21

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木村 宏之

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

20

25

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

19

田畑 吉計

金子 純一

中性子極小角散乱実験装置のアップグレード

18

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

古坂 道弘

小型集束型小角散乱装置の高性能化及びそれによる応用研究

17

24

礒田 誠

重い電子系物質における圧力下電気抵抗測定

16

平賀 晴弘

鹿又 武

3d 遷移金属化合物の圧力下における磁気特性15

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

名嘉 節

磁化測定装置の開発

14

23

梅原 出

氏名

高圧下の比熱測定装置の開発

課題名

13

No.

Takeshi Kanomata

Investigation of magnetic properties for 3d transitionintermetallic compounds under pressure

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

金属材料研究所 Propelling the inter university research cooperation

金属材料研究所

京都大学

茨城大学

茨城大学

総合科学研究機
構

広島大学

京都大学

Keitaro Kuwahara

Masato Matsuura

Takeshi Matsumura

Yoshikazu Tabata

Seiji Tasaki

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

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

理学部

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

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

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

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

Haruhiro Hiraka

Kenji Ohoyama

Masaki Fujita

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

Kazuaki Iwasa

Junichi Kaneko

大学院工学研究
Upgrade of ULS system
院
大学院理学研究 Structural studies of strongly correlated electron systems byneutron scattering method and instrumental development
科

Michihiro Furusaka

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

Takashi Naka

Izuru Umehara

Development of the magnetometer

Development of apparatus for specific heat measurements
under high pressure

Name

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

教育学部

工学総合研究所

工学部

Title

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

東北大学

東北大学

東北大学

東北大学

北海道大学

北海道大学

香川大学

東北学院大学

物質・材料研究機構

横浜国立大学所属

Kyoto University

Ibaraki University

Ibaraki University

CROSS

Hiroshima University

Kyoto University

KEK

Tohoku University

Tohoku University

Tohoku University

Tohoku University

Hokkaido University

Hokkaido University

Kagawa University

Tohoku Gakuin
University

National Institute forMaterials Science

Yokohama National
University

Organization

60

ISSP Activity Report 2013
杉山 正明
日野 正裕
北口 雅暁
藤原 哲也
高橋 良彰
阿曽 尚文
川端 庸平
伊藤 晋一
大竹 淑恵
佐藤 卓
南部 雄亮
藤森 淳
石坂 香子
下志万 貴博
竹内 恒博
横谷 尚睦

C1-3 ULS 極小角散乱装置 IRT

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

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

中性子散乱用高圧セルの開発および高圧下における中性子散乱実験

流動場でのソフトマターの構造変化に関する研究三軸分光器を用いた極端条件下における物質科
学研究の実施

非イオン界面活性剤水溶液ゲル構造に対する高分子添加効果

中性子散乱研究計画の実施と共同利用の推進

冷中性子干渉イメージング装置開発研究

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

高温超伝導体の高分解能光電子分光

60-eV レーザーを用いた時間分解光電子分光の開発

鉄系超伝導体のレーザー光電子分光

Bi 系超伝導体の角度分解光電子分光

高分解能光電子分光による強相関物質の研究

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

中野 実

膜貫通ペプチドのフリップフロップ誘起能の評
価

30

氏名

課題名

No.

岡山大学

名古屋大学

東京大学

東京大学

東京大学

東北大学

東北大学

理化学研究所高エネルギー加速器研究機構首都大学東京

琉球大学

九州大学

山口大学

名古屋大学

京都大学

京都大学

富山大学

Title

Name

Improvement of MIEZE spectrometer and cold neutronreflectometer and interferometer

Development of micro-focusing small-angle neutron scattering
spectrometer

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

Yoshie Otake

Shinichi Itoh

Youhei Kawabata

Naofumi Aso

Yoshiaki Takahashi

Tetsuya Fujiwara

Masaaki Kitaguchi

Masahiro Hino

Masaaki Sugiyama

Kyoko Ishizaka
Takahiro Shimojima
Tsunehiro Takeuchi
Takayoshi Yokoya

大学院工学系研
Laser-ARPES on Fe superconductor
究科
エコトピア科学
Angle-resolved photoemission study on high Tc cuprate研究所
大学院自然科学
Ultra-high resolution study on strongly correlated materials
研究科

Atsushi Fujimori

大学院理学系研 Ultra-high resolution photoemission spectroscopy on high Tc
superconductor
究科
大学院工学系研 The development of time-resolved photoemission using 60eV
laser
究科

Yusuke Nambu

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

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

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

Propelling the inter university research cooperation

大学院理工学研 Effect of polymer addition to gel structures in a nonionicsurfactant solution
究科

理学部

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

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

素粒子宇宙起源 Development of compact SANS and improvement of cold
neutron reflectometer and interferometer
研究機構

原子炉実験所

原子炉実験所大学院医学薬学
Induction of phospholipid flip-flop by transmembrane peptides Minoru Nakano
研究部

所属

Okayama University

Nagoya University

The University ofTokyo

The University ofTokyo

The University ofTokyo

Tohoku University

Tohoku University

RIKEN

KEK

Tokyo Metropolitan
University

University of the
Ryukyus

Kyushu University

Yamaguchi University

Nagoya University

Kyoto University

Kyoto University

University of Toyama

Organization

ISSP Activity Report 2013

61

伊藤 健二
奥田 太一
木下 豊彦
小野 寛太

高輝度光源計画における直入射ビームラインおよびその利用計画の検討

光電子スピン検出器の開発・研究

光電子顕微鏡による磁性ナノ構造物質の磁化過程

高輝度極紫外ビームラインの設計・評価

60

61

62

63

藤原 秀紀

高分解能光電子分光による酸化バナジウムの研
究

56

雨宮 健太

関山 明

時間分解光電子分光による重い電子系の研究

55

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大川 万里生Mn 化合物の時間分解光電子分光

54

59

中川 剛志

超高空間分解能光電子顕微鏡による磁区構造観
察

53

近藤 寛

松波 雅治

4f 電子系物質の高分解能光電子分光

52

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

レーザー光電子分光による酸化物薄膜の研究

51

58

小野 寛太

レーザー PEEM による磁性体の研究

50

吉松 公平

藤森 伸一

重い電子系ウラン化合物の高分解能光電子分光

49

角度分解光電子分光法による遷移金属酸化物の表面 / 界面電子状態の研究

金井 要

有機化合物の光電子分光

48

57

江口 律子

氏名

酸化バナジウムの高分解能光電子分光

課題名

47

No.

Time resolved photoemission on Mn compounds

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

Taichi Okuda

Kenji Ito

Kenta Amemiya

Hiroshi Kondoh

Kanta Ono

Magnetization in process of magnetic nano structure by PEEM Toyohiko Kinoshita

高エネルギー加 物質構造科学研
Design and characterization of brilliance VUV beamline
速器研究機構究所

高輝度光科学研究センター

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

高エネルギー加 物質構造科学研 Design and case study for the high-resolution atoms- andmolecules-spectroscopy beamline at the Super SOR facility
速器研究機構究所
広島大学

Hidenori Fujiwara

Akira Sekiyama

Mario Okawa

Takeshi Nakagawa

大学院理学系研 Angle-resolved photoemission study of the interfacial states of
Kohei Yoshimatsu
transition-metal oxides
究科

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

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

理学部

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

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

慶應義塾大学

東京大学

大阪大学

大阪大学

東京理科大学

九州大学

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

Masaharu
Matsunami

Shunsuke Tsuda

物質・材料研究機構
Laser-Photoemission Study on Oxide Films

Kanta Ono

Kaname Kanai

高エネルギー加 物質構造科学研
Study on magnetism by laser PEEM
速器研究機構究所

Photoemission study on organic compounds

Ritsuko Eguchi

Name

Shinichi Fujimori

理工学部

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

Title

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

東京理科大学

岡山大学

所属

KEK

Japan Synchrotron
Radiation Institute

Hiroshima University

KEK

KEK

Keio University

The University ofTokyo

Osaka University

Osaka University

Tokyo University of
Science

Kyushu University

National Institutes of
Natural Sciences

National Institute forMaterials Science

KEK

Japan Atomic Energy
AgencyTokyo University of
ScienceOkayama University

Organization

62

ISSP Activity Report 2013

Title

東北大学

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

組頭 広志
小澤 健一
木村 昭夫
坂本 一之
大門 寛
北村 英男

関場 大一郎
三宅 和正
田島 裕之
和達 大樹
木村 健太

軟 X 線時間分解分光実験による磁性研究

高輝度軟 X 線を利用する光電子顕微鏡装置の設計・開発

二次元表示型スピン分解光電子エネルギー分析器の開発

偏光制御軟 X 線アンジュレータの研究開発

Si（111）表面相転移におけるキャリアダイナミ
虻川 匡司
クスの研究
細野 英司

時間分解光電子分光法による光触媒材料のキャ
リアダイナミクス研究

軟 X 線吸収／発光分光法によるリチウムイオン
電池電極材料の電子物性研究

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

価数異常を伴う量子臨界現象

有機薄膜の物性測定

光電子分光、共鳴軟 X 線回折

幾何学的フラストレーション系における量子物
性の研究

68

69

70

71

72

73

74

75

76

77

78

79

大阪大学

東京大学

兵庫県立大学

豊田理化学研究
所

筑波大学

理化学研究所

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

Kenta Kimura

Hiroki Wadati

大学院工学系研 Spades photoemission spectroscopy・resonant soft x-ray
scattering
究科

Kazumasa Miyake
Hiroyuki Tajima

Quantum criticality associated with valence instability

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

Tadashi Abukawa

Hideo Kitamura

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

数理物質系

多元物質科学研
Study of carrier dynamics during Si(111) surface transition
究所

Research and development of polarization-controlled soft
X-ray undulator

Hiroshi Daimon

Kazuyuki Sakamoto

Akio Kimura

大学院理学研究 Study of magnetic properties by time-resolved soft X-ray
spectroscopy
科
大学院融合科学 Research and designing of a PEEM spectrometer for highbrilliance soft X ray
研究科

Kenichi Ozawa

Organization

Japan Synchrotron
Radiation InstituteJapan Synchrotron
Radiation InstituteNational Institutes of
Natural Sciences

Osaka University

The University ofTokyo

University of Hyogo

Toyota Physical andChemical ResearchInstitute

University of Tsukuba

National Institute ofAdvanced Industrial
Science and Technology

Tohoku University

RIKEN

Nara Instituteof Science andTechnology

Chiba University

Hiroshima University

Tokyo Institute ofTechnology

Hiroshi Kumigashira KEK

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

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

千葉大学

広島大学

東京工業大学高エネルギー加 物質構造科学研 Study of electronic states in strongly correlated materials withhigh brilliant soft-X ray.
速器研究機構究所

Haruhiko Ohashi

高輝度軟 X 線を利用した強相関物質の電子状態
研究

〃

67

高輝度光科学研
究センター

大橋 治彦

Shunji Goto〃

Design of the new undulator beamline at SPring-8

Shinichi Kimura

Name

66

高輝度光科学研究センター

自然科学研究機
分子科学研究所 Design and characterization of brilliance VUV beamline
構

所属

後藤 俊治

木村 真一

氏名

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

高輝度極紫外ビームラインの設計・評価

課題名

65

64

No.

ISSP Activity Report 2013

63

課題名

三浦 尊

〃

9

國松 貴之
山口 博則
岩瀬 賢治

〃

有機ラジカルを用いた新規磁性体の低温磁気測
定

〃

15

16

石川 修六

超流動ヘリウム３-A 相の半整数量子渦の研究

13

14

安井 幸夫

新奇な強磁性転移をもつパイロクロア化合物
Yb2Ti2O7 の磁気相図

鎌田 尚史

12

〃

岩佐 泉

〃

8

11

青木 悠樹

固体ヘリウム 4 の非古典的回転慣性の遮断効果

7

山口 明

石川 沙羅

〃

6

新しいスピンフィルターを用いた超流動ヘリウ
ム３スピン流制御の研究

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

5

10

竹澤 遼

吉澤 正人

谷口 智洋

高津 浩

氏名

〃

強相関伝導系のパルス磁場中の超音波測定〃

スピン液体 Tb2Ti2O7 の比熱測定

課題名

氏名

4

3

2

1

No.

一般研究員（General Researcher）

No.

大阪府立大学

大阪府立大学

大阪市立大学

大阪市立大学明治大学

兵庫県立大学

兵庫県立大学

東京工業大学

神奈川大学

東京工業大学

茨城大学

茨城大学

岩手大学

岩手大学

首都大学東京首都大学東京Tomohiro Taniguchi〃

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

Sara Ishikawa

Makoto Yokoyama

Kenji Iwase

大学院理学系研
究科〃

Hironori Yamaguchi

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

Osaka Prefecture
University

Osaka Prefecture
University

Takayuki Kunimatsu Osaka City University〃

Osaka City University

Meiji University

大学院理学研究
科

Yukio Yasui
Osamu Ishikawa

Magnetic phase diagram of pyrochlore compound Yb2Ti2O7
with anomalous ferromagnetic transition

University of Hyogo

University of Hyogo

Tokyo Institute ofTechnology

Kanagawa University

Tokyo Institute ofTechnology

Ibaraki University

Ibaraki University

Iwate University

Iwate University

Tokyo Metropolitan
University

Tokyo Metropolitan
University

Organization

Organization

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

理工学部

Naofumi Kamada〃

大学院物質理学研究科

Takeru Miura
Akira Yamaguchi〃

大学院理工学研
究科

Izumi Iwasa

大学院物質理学New spin filter for spin current control in superfluid helium-3
研究科

〃

理学部

大学院総合理工 Blocking effect of nonclassical rotational momentum inertia for
Yuki Aoki
Solid Helium 4
学研究科

大学院理工学研
究科

理学部

Haruka Takezawa

大学院工学研究科〃

Masahito Yoshizawa

大学院工学研究 Ultrasonic measurements of strongly correlated systems inpulsed magnetic field科〃

大学院理工学研
究科

Name

Name

Hiroshi Takatsu

Title

Title

大学院理工学研 Specific heat measurements on a spin liquid candidate
Tb2Ti2O7
究科

所属

所属

64

ISSP Activity Report 2013
篠崎 彩子
関根 ちひろ高温高圧下おいて水素分子が石英の結晶構造に与える影響

充填スクッテルダイト構造を有する新熱電変換
材料の開発

〃

22

23

24

飯田 勇気

〃

30

三好 正悟
田中 和彦

〃

〃

32

33

山口 周

ドロクサリブ
ロラス
ティンブル

〃

29

溶融亜鉛メッキ合金相の応力誘起変態

東京大学

田中 和彦

〃

28

31

東京大学

三好 正悟

〃

27

東京大学

東京大学

東京大学

東京大学

東京大学

東京大学

山口 周

超高圧プレスを用いた新規プロトニクス酸化物のソフト化学的合成法の検討

26

岡山理科大学寒川 匡哉

超硬質窒化炭素の高温高圧合成

室蘭工業大学

室蘭工業大学

東京大学

東邦大学

東邦大学

神戸大学

神戸大学

大阪府立大学

25

川合 拓馬

山本 翔平

〃

森山 広思

21

フラーライド単結晶の伝導性と磁性

川向 希昂

〃

19

20

高橋 一志

スピンクロスオーバー伝導体に対する圧力効果

18

奥 雄太

有機ラジカルを用いた新規磁性体の低温磁気測
定

17

氏名

課題名

No.

Title

〃

Magnetic and transport properties of fullereide single crystals〃

大学院工学研究
科

Kazuhiko Tanaka

Shogo Miyoshi〃

大学院工学研究科

Yuki Iida
Shu Yamaguchi〃

大学院工学研究科

Doloksaribu Rolas
Timbul

大学院工学研究 Stress-induced phase transformation of Fe-Zn alloy formed in
hot-dip process科〃〃

大学院工学研究科
大学院工学研究科

Shogo Miyoshi〃

大学院工学研究
科

Kazuhiko Tanaka

Shu Yamaguchi

Synthesis of superhard carbon nitride at high temperature andMasaya Sougawa
high pressure

大学院工学研究 Oxide-protonics materials synthesis by combined use of soft
chemical method and high pressure科

理学部

Takuma Kawaai

大学院工学研究科〃

Chihiro Sekine

Ayako Shinozaki

Shohei Yamamoto

Hiroshi Moriyama

大学院工学研究 Development of new thermoelectric materials with filledskutterudite structure科

大学院理学系研 Effect of hydrogen molecules to crystal structure of quartz
under high pressure
究科

大学院理学研究
科

理学部

Kiko Kawamukai

大学院理学研究科〃

Kazuyuki Takahashi

Yuta Oku

Name

大学院理学研究
Pressure effect on spin crossover conductors
科

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

Okayama University of
Science

Muroran Institute ofTechnology

Muroran Institute ofTechnology

The University ofTokyo

Toho University

Toho University

Kobe University

Kobe University

Osaka Prefecture
University

Organization

ISSP Activity Report 201365

量子ホール効果測定のための高移動度半導体試
料作成

〃

47

48

50

49

長井 健太

〃

46

〃

栃原 浩

SiC 表面上のエピタキシャルシリコン酸化物超薄鈴木 孝将
膜のバンドギャップ接続に関する研究

寺澤 大樹

福田 昭

渡辺 量朗

表面プラズモンを支持する金属単結晶面の作成と解析 (3)

田中 慎一郎

カーボンナノマテリアル表面からの２次電子放出機構の研究

43

45

伊高 健治

太陽電池応用を目指したシリコン材料プロセス
の研究

42

成島 哲也

B サイト秩序型ペロブスカイト酸化物のエピタキ
大久保 勇男
シャル薄膜におけるマルチフェロイック特性

41

機械的応力のシリコン表面化学への影響に関す
る研究

山下 靖文

1/5 欠損正方格子ハバードモデルの磁気相図

40

44

鳥塚 潔

浜田 佑美

有機伝導体の低温物性測定

〃

39

38

松田 真生

袋井 克平

〃

36

分子性導電体の磁気・光物性研究高橋 一志

スピンクロスオーバー伝導体の電流電圧特性の
光応答

35

37

上田 涼平

氏名

溶融亜鉛メッキ合金相の応力誘起変態

課題名

34

No.

Kappei Fukuroi

大学院理学研究
科

工学部

理工学部

Yumi Hamada

大学院自然科学研究科

Yasufumi Yamashita

Magnetic phase diagram of the 1/5-depleted square-lattice
Hubbard model

産業科学研究所

Mechanism of the secondary-electron emission from thesurface of carbon nanomaterials

北日本新エネル Research of the process of silicon products for solar cellapplication
ギー研究所

福岡大学

福岡大学

兵庫医科大学兵庫医科大学

東京理科大学

東京理科大学

工学部

工学部

教養部門

教養部門

〃

Study on band-gap profiles of epitaxial ultra-thin films on SiC
surfaces〃

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

Hiroshi Tochihara

Takayuki Suzuki

Daiju Terasawa

Akira Fukuda

Kenta Nagai

大学院総合化学研究科〃

Kazuo Watanabe

Tetsuya Narushima

Shin-ichiro Tanaka

Kenji Itaka

大学院総合化学 Fabrication and analysis of single crystal metal surfaces
supporting surface plasmons (3)研究科

Effect on silicon surface chemistry under external mechanical
自然科学研究機
分子科学研究所
stress
構

大阪大学

弘前大学

Isao Ohkubo

Kiyoshi Torizuka

Measurements of low temperature properties of organic thinfilms (2)〃Masaki Matsuda

大学院自然科学 Studies on magnetic and optical properties of molecular
conductors
研究科〃

Kazuyuki Takahashi

Ryohei Ueda

Name

大学院理学研究 Photo response of I-V characteristics of spin crossoverconductors
科

大学院工学研究 Stress-induced phase transformation of Fe-Zn alloy formed in
hot-dip process
科

Title

国際ナノアーキMultiferroicity in epitaxial films of B-site ordered perovskite
物質・材料研究
テクトニクス研
oxides
機構
究拠点

日本大学

法政大学

熊本大学

熊本大学

神戸大学

神戸大学

東京大学

所属

Fukuoka University

Fukuoka University

Hyogo College ofMedicine

Hyogo College ofMedicineTokyo University of
ScienceTokyo University of
ScienceNational Institutes of
Natural Sciences

Osaka University

Hirosaki University

National Institute forMaterials Science

Nihon University

Hosei University

Kumamoto University

Kumamoto University

Kobe University

Kobe University

The University ofTokyo

Organization

66

ISSP Activity Report 2013
松本 佳大

〃

61

道村 真司
阿曽 尚文

〃

セリウム系磁性超伝導体における微小磁気モーメントの圧力下磁化測定 III

67

伊賀 文俊

TmB4 の磁気準周期秩序相における圧力効果

65

66

北川 健太郎池田 大地

R-TM-Ge 系新物質の基本物性評価

〃

64

63

Ni-Mn-Ga 系強磁性形状記憶合金の磁化の圧力依
安達 義也
存性

小山 佳一

Mn2Sb 系メタ磁性体の高圧下における磁気状態

60

62

藤原 哲也

安藤 拓矢

和氣 剛

中田 琢也

藤原 哲也

LaFe2P2 の輸送特性の圧力効果〃

Fe3Mo3N の高圧下電気抵抗率測定〃

EuCo2P2 の高圧力下磁化測定

59

58

57

56

55

森田 哲広

〃

54

繁岡 透
藤原 哲也

(Ho,Y)Rh2Si2 単結晶の磁気転移

52

河村 紀一

〃

金属／半導体表面上ナノ構造の形成とその非線形発光の時間分解測定

51

氏名

53

課題名

No.

Title

Name

Organization

琉球大学

埼玉大学

茨城大学

高知大学

山形大学

山形大学

鹿児島大学

鹿児島大学

山口大学

京都大学

京都大学

山口大学

山口大学

山口大学

山口大学

山口大学

Takuya Ando

大学院工学研究科

Yoshihiro Matsumoto Kagoshima University

大学院理工学研
究科

理学部

研究機構

理学部

教育研究部

Daichi Ikeda

大学院理工学研
究科

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

Naofumi Aso

Shinji Michimura

Fumitoshi Iga

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

Kentaro Kitagawa

Investigation for basic properties in a new R-TM-Ge system〃

Yoshiya Adachi

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

University of the
Ryukyus

Saitama University

Ibaraki University

Kochi University

Yamagata University

Yamagata University

Kagoshima University

Keiichi Koyama

大学院理工学研
Magnetic state of Mn2Sb metamagnets under high pressure
究科〃

Yamaguchi University

Kyoto University

大学院理工学研
Pressure effect on the electrical transport properties of LaFe2P2 Tetsuya Fujiwara
究科〃

Takeshi Waki

大学院工学研究
Resistivity measurement of Fe3Mo3N under high pressure
科

Kyoto University

Yamaguchi University

Takuya Nakada

大学院理工学研
究科〃

Yamaguchi University

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

大学院理工学研
究科

Yamaguchi University
Yamaguchi University

Tetsuya Fujiwara〃

大学院理工学研
究科

Yamaguchi University

Tetsuhiro Morita

Toru Shigeoka

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

NHK Science &日本放送協会放 表示・機能素子 Time resolved spectroscopy of harmonics from nano-structures
Norikazu Kawamura Technical Researchon metal/semiconductor surfaces
送技術研究所研究部
Laboratories

所属ISSP Activity Report 201367

井村 敬一郎
松川 周矢
中野 智仁
大屋 七海

〃

〃

希土類化合物の純良単結晶育成と圧力下低温物
性

〃

71

72

73

74

柄木 良友
藤原 哲也
河江 達也
佐藤 由昌

磁化測定用対向アンビル型高圧力発生装置の開発 (2)重い電子系物質における 3He 温度領域での磁化
測定

〃

82

83

84

水野 博貴

〃

80

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

雨海 有佑

〃

79

81

村山 茂幸

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

青山 悠司

78

〃

武田 直也

幾何学的フラストレート系の圧力効果の研究

76

77

大橋 政司

希土類強磁性体 RAl2 の異方的磁気体積効果

75

出口 和彦

価数揺動系 SmS ならびに Yb 系準結晶における高圧下物性研究70

太刀掛 勇哉

本山 岳

氏名

〃

圧力下磁場中点接合分光実験の試み

課題名

69

68

No.

九州大学

九州大学

山口大学

琉球大学

室蘭工業大学

室蘭工業大学

室蘭工業大学

新潟大学

新潟大学

金沢大学

新潟大学

新潟大学

名古屋大学

名古屋大学

名古屋大学

兵庫県立大学

島根大学
Yuya Tachikake

Keiichiro Imura〃〃

大学院理学研究科
大学院理学研究科

Low temperature magnetism of triangular lattice
antiferromagnet NaM(Acac)3benzene (M=Ni,Mn,Fe)

大学院工学府〃大学院工学研究 Magnetization measurements in 3He temperature region forheavy fermion systems
院

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

教育学部

〃

大学院工学研究科

Yoshiaki Sato

Tatsuya Kawae

Tetsuya Fujiwara

Yoshitomo Karaki

Hiroki Mizuno

Yusuke Amakai〃

大学院工学研究
科

Yuji Aoyama

Naoya Takeda

Masashi Ohashi

Shigeyuki Murayama〃

Pressure effect of geometric frustration system

Anisotropic magnetovolume effect of rare earth ferromagnet
RAl2

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

大学院自然科学
研究科

工学部

理工研究域

Nami Ohya

大学院自然科学研究科〃

Tomohito Nakano

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

Shuya Matsukawa

Kazuhiko Deguchi

大学院理学研究 High-pressure study on mixed-valence SmS and Ybquasicrystal
科〃

大学院物質理学研究科

Name
Gaku Motoyama

Title

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

所属

Kyushu University

Kyushu University

Yamaguchi University

University of the
RyukyusMuroran Institute ofTechnology

Muroran Institute ofTechnology

Muroran Institute ofTechnology

Niigata University

Niigata University

Kanazawa University

Niigata University

Niigata University

Nagoya University

Nagoya University

Nagoya University

University of Hyogo

Shimane University

Organization

68

ISSP Activity Report 2013

101

〃

藤原 哲也

繁岡 透

阿曽 尚文

中性子散乱研究用大型単結晶試料の結晶性評価

99

100 DyPd2Ge2 単結晶の逐次磁気転移

真中 浩貴

三角スピンチューブのスピンダイナミクス

98

山口大学

山口大学

琉球大学

鹿児島大学

京都大学

原田 健自

テンソルネットワーク変分法の開発

97

名古屋大学

名古屋大学

兵庫県立大学鈴木 健太郎長谷川 正

SU(N) スピンをもつ 2 次元一般化 Heisenberg 模
鈴木 隆史
型の有限温度転移〃新規遷移金属窒化物の超高圧合成

名古屋大学

名古屋大学

桐蔭横浜大学

大阪市立大学

大阪市立大学

山口大学

山口大学

山口大学

九州大学

96

95

94

岩崎 純也

丹羽 健

新規遷移金属炭化物の高圧合成

92

〃

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

91

93

福本 雄平

村田 惠三

〃

低次元有機伝導体の温度圧力相図の構築

90

89

蔵田 裕也

〃

88

繁岡 透
藤原 哲也

多形化合物 DyIr2Si2 の磁気特性

86

古谷 圭一

〃

重い電子系物質における 3He 温度領域での磁化
測定

85

氏名

87

課題名

No.

〃

大学院理工学研
究科

Yuhei Fukumoto

大学院理学研究科

Ken Niwa
Junya Iwasaki

大学院工学研究High pressure synthesis of new transition metal carbides科
大学院工学研究科

Kentaro Suzuki

大学院工学研究
科

Tetsuya Fujiwara

大学院理工学研
究科〃

Toru Shigeoka

大学院理工学研
Successive magnetic transitions of DyPd2Ge2 single crystal
究科

Naofumi Aso

Hirotaka Manaka

大学院理工学研
Spin dynamics of triangular spin tubes
究科
Crystal quality evaluation of large single crystals for neutron
scattering

Kenji Harada

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

理学部

Takafumi Suzuki

大学院工学研究 Finite temperature phase transition in 2d SU(N)-spin
Heisenberg models
科〃

Masashi Hasegawa

大学院工学研究High pressure synthesis of novel transition metal nitrides
科〃

Yasuhiro Miura

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

Keizo Murata

大学院理学研究 Temperature-pressure phase diagram of low dimensionalorganic conductors
科

Yuya Kurata

Tetsuya Fujiwara〃

大学院理工学研
究科

Keiichi Furuya

NameToru Shigeoka

Magnetization measurements in 3He temperature region forheavy fermion systems

Title

大学院理工学研
Magnetic property of polymorphic compound DyIr2Si2
究科

大学院工学府所属

Yamaguchi University

Yamaguchi University

University of the
RyukyusKagoshima University

Kyoto University

University of Hyogo

Nagoya University

Nagoya University

Nagoya University

Nagoya University

Toin University of
Yokohama

Osaka City University

Osaka City University

Yamaguchi University

Yamaguchi University

Yamaguchi University

Kyushu University

Organization

ISSP Activity Report 2013

69

課題名
田端 克好

氏名

〃

〃

〃

植田 浩明
小林 慎太郎田口 篤史

スピン・電荷・軌道の自由度をもつ新規フラス
トレート物質の磁性

〃

〃

116

117

118

佐藤 桂輔

原口 祐哉

〃

114

115 LaCoO3 系の強磁場誘起スピン転移の研究

今井 正樹

〃

道岡 千城

藤井 洋

繁岡 透

森田 哲広

113

112 Co を含む遍歴電子メタ磁性体の強磁場測定

111

110 (Ho,Y)Rh2Si2 単結晶の高磁場磁化

109

繁岡 透

108 (Ho,Gd)Rh2Si2 単結晶の高磁場磁化

中田 琢也
山崎 照夫

〃

藤原 哲也

清原 達也

107 鉄系超伝導体 FeTe1-xSx のアニール効果

106

105 新規三元化合物 CeZn2Ge2 の輸送特性

104

103 パイロクロア磁性体 Tb2+xTi2-xO7-y の比熱研究 高津 浩

102 DyPd2Ge2 単結晶の逐次磁気転移

No.

Tatsuya Kiyohara

大学院理工学研
究科

Tetsuhiro Morita

Yoh Fujii

大学院理工学研
究科〃

大学院理学研究
科

京都大学

京都大学

京都大学

Shintaro Kobayashi〃〃

大学院理学研究科
大学院理学研究科

Atsushi Taguchi

Hiroaki Ueda

Keisuke Sato

大学院理学研究 Magnetism of novel frustrated materials with spin, charge,
orbital degrees of freedom
科

Field induced spin-state transition in LaCoO3

Masaki Imai〃

大学院理学研究
科

Yuya Haraguchi

Chishiro Michioka

大学院理学研究 High field magnetization of the itinerant metamagnet withcobalt ions科〃

Toru Shigeoka

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

大学院理工学研
究科

Teruo Yamazaki
Toru Shigeoka

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

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

理工学部

Takuya Nakada

大学院理工学研
究科〃

Tetsuya Fujiwara

大学院理工学研 Electrical transport properties of new ternary compound
CeZn2Ge2
究科〃

Hiroshi Takatsu

大学院理工学研 Specific heat studies of a pyrochlore-lattice magnet
Tb2+xTi2-xO7-y
究科

Name
Katsuyoshi Tabata

Title

大学院理工学研
Successive magnetic transitions of DyPd2Ge2 single crystal
究科

茨城工業高等専
自然科学
門学校

京都大学

京都大学

京都大学

山口大学

山口大学

山口大学

山口大学

東京理科大学

山口大学

山口大学

首都大学東京首都大学東京山口大学

所属

Kyoto University

Kyoto University

Kyoto University

Ibaraki National
College of Technology

Kyoto University

Kyoto University

Kyoto University

Yamaguchi University

Yamaguchi University

Yamaguchi University

Yamaguchi University

Tokyo University of
Science

Yamaguchi University

Yamaguchi University

Tokyo Metropolitan
University

Tokyo Metropolitan
University

Yamaguchi University

Organization

70

ISSP Activity Report 2013
渡辺 孝夫
掛谷 一弘
臼井 友洋

高ドープ高温超伝導体のパルス強磁場下輸送現
象

〃

〃

131

132

133
伊賀 文俊

135 四元系 η- カーバイド型化合物の強磁場磁化測定 和氣 剛

134 高圧合成希土類 12 ホウ化物の磁化特性

小川 智矢

〃

130

稲田 貢

金属ナノクラスターネットワークの磁気抵抗測
定

129

石井 克弥

京都大学

茨城大学

弘前大学

京都大学

弘前大学

関西大学

関西大学

茨城大学

茨城大学

近藤半導体 (Yb, R)B12 (R=Zr, Sc) の 80T 級磁場
伊賀 文俊
下での強磁場物性

〃

静岡大学

静岡大学

九州大学

九州大学

鹿児島大学

鹿児島大学

九州大学

京都大学

土屋 政人

〃

128

127

126

海老原 孝雄

福井 博章

〃

124

125 希土類金属間化合物の強磁場物性研究浅野 貴行

モリブデン酸銅におけるマルチクロミズム現象
の観測

123

西井上 創羅

〃

122

廣井 政彦

121 ホイスラー化合物 Ru2-xFexCrSi の強磁場磁化

田畑 吉計
稲垣 祐次

ナローギャップ半導体 Fe1-xCoxSb2 の強磁場誘起強磁性の探索119

氏名120 パルス磁場下比熱測定法による物性研究

課題名

No.

Title

Soura Nishiinoue

大学院理工学研究科

大学院工学研究 High field magnetization measurement of quartery η-carbidetype compounds
科

Magnetic property of rare earth dodecaborides produced byhigh pressure synthesis〃

大学院理工学研
究科
理学部

Itsuhiro Kakeya〃

大学院工学研究
科

Takeshi Waki

Fumitoshi Iga

Tomohiro Usui

Takao Watanabe

Tomoya Ogawa

大学院理工学研 Transport phenomena in strongly-doped high-Tc
superconductors under pulsed high magnetic fields
究科〃

Kyoto University

Ibaraki University

Hirosaki University

Kyoto University

Hirosaki University

Kansai University

Ibaraki University

Ibaraki University

Shizuoka University

Shizuoka University

Kyushu University

大学院理工学研
究科

Katsuya Ishii

Fumitoshi Iga

Masato Tsuchiya

Takao Ebihara

Hiroaki Fukui

Kansai University〃

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

Physical phenomena at high magnetic fields in rear earth
intermetallic compounds〃

Kyushu University

Kagoshima University

Kagoshima University

Kyushu University

Kyoto University

Organization

システム理工学 Electronic transport properties of metal cluster networks underMitsuru Inada
high-magnetic field部

大学院理工学研
究科

理学部

大学院理学研究科

理学部

大学院理学府大学院理学研究
Observation of multi-chromic phenomena in the CuMoO4
院

Takayuki Asano

Masahiko Hiroi

大学院理工学研 Magnetizaiton of Heusler compounds Ru2-xFexCrSi in highmagnetic field
究科〃

Yuji Inagaki

Yoshikazu Tabata

Name

大学院工学研究 High field study by specific heat measurements under pulsed
magnetic field院

大学院工学研究 Search for a high-field induced ferromagnetic state in the
narrow-gap semiconductor Fe1-xCoxSb2
科所属

ISSP Activity Report 2013

71

安藤 悠一

幾何学的フラストレーションを有する磁性体の強磁場下での振舞い〃

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

〃

148

149

150

151

152 二次元遍歴電子磁性体の強磁場下での磁化過程

香取 浩子

〃

147

太田 寛人

キョ キョウ伊東 航

後藤 岳

パイロクロア型イリジウム酸化物の強磁場下の
物性研究
松平 和之

林 健人

東京農工大学

東北大学

Title

〃

Kento Hayashi

High field magnetization of Kondo insulator (Yb,R)B12 by using
Fumitoshi Iga
one-turn coil in a 120T pulse magnet〃〃

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

大学院工学研究 Magnetic behavior of 2-dimensional itinerant electronicmagnets under high magnetic field院

大学院工学研究科

大学院工学府大学院工学研究 Properties of geometrically frustrated magnets in highmagnetic fields
院

大学院工学府

Hiroto Ohta

Xiao XU

Wataru ItoYuichi Ando

Hiroko Katori

Gaku Goto

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

大学院理工学研
究科

理学部

Kazuya Taniguchi

極限量子科学研究センター〃

Masayuki Hagiwara

Masakazu Ito

極限量子科学研 Development of a wide-bore pulse magnet for experimental
apparatus used under multiple extreme conditions究センター

大学院理工学研High field magnetization of Heusler compound Fe2Mn1-xVxSi
究科〃

大学院理学系研
究科

Kentaro Kikuchi

Naoki Amaya〃

大学院理学系研
究科

Shigeo Hara
Yuko Hosokoshi

Heat capacity measurement of novel vanadium based oxide

Takuya Ando

Name

大学院理学系研 High-field magnetization measurements of organic lowdimensional magnets
究科

理工学部

大学院工学研究 High field magnetization measurement of quartary η-carbidetype compounds
科

所属

仙台高等専門学校

東京農工大学

東京農工大学

九州工業大学

九州工業大学

茨城大学

茨城大学

近藤半導体 (Yb,R)B12 のワンターンコイル 120T
伊賀 文俊
パルス磁場下での強磁場磁化過程

〃

大阪大学

谷口 一也

〃

146

145

144

143

大阪大学

複合極限装置のためのワイドボアパルスマグ
ネットの開発

142

萩原 政幸

鹿児島大学

大阪府立大学

鉄系ホイスラー化合物 Fe2Mn1-xVxSi の高磁場磁
伊藤 昌和
化測定

菊地 健太郎〃140

大阪府立大学

141

天谷 直樹

〃

139

細越 裕子

138 低次元有機磁性体の強磁場磁化測定

大阪府立大学中央大学

原 茂生

137 水熱合成法による新規 V 系酸化物の比熱測定

氏名
京都大学

課題名

136 四元系 η- カーバイド型化合物の強磁場磁化測定 安藤 拓矢

No.

Tokyo Universityof Agriculture andTechnology

Tohoku University

Sendai National
College of Technology

Tokyo Universityof Agriculture andTechnology
Tokyo Universityof Agriculture andTechnology

Kyushu Institute ofTechnology

Kyushu Institute ofTechnology

Ibaraki University

Ibaraki University

Osaka University

Osaka University

Kagoshima University

Osaka Prefecture
University

Osaka Prefecture
University

Osaka Prefecture
University

Chuo University

Kyoto University

Organization

72

ISSP Activity Report 2013

課題名

中井 裕子
矢口 裕之
高宮 健吾
山崎 泰由

〃

窒素デルタドーピング構造半導体中の等電子ト
ラップの光学特性評価

〃

〃

158

159

160

161

吉清 まりえ〃マルチフェロイック物質 YBaCuFeO5 の単結晶
評価

166

167

169

半導体基板上に成長したグラフェンナノリボン
およびシリセンの電子物性

168 Bi ナノワイヤーにおける量子振動実験

生井 飛鳥

〃

165

中辻 寛

長谷川 靖洋

安井 幸夫

大越 慎一

テラヘルツ分光装置を用いた酸化物磁性材料の研究

164

太田 奈津美

〃

163

小柴 俊

小柴 俊

MBE 法による窒化物半導体ナノ超格子の高分解
能 X 線回折測定

157

窒素ラジカル変調制御法を用いた RF-MBE に
162 よる GaNAs/GaAs 多重量子井戸構造を含んだ
p-i-n 接合の特性評価

東北大学

吹留 博一

二次元 Dirac 電子系における多体効果のナノス
ケール制御

156

東京工業大学

埼玉大学

明治大学

東京大学

東京大学

東京大学

香川大学

香川大学

埼玉大学

埼玉大学

埼玉大学

香川大学

香川大学

東京大学

Ca2-xSrxRuO4 における不純物効果のレーザー光
溝川 貴司
電子分光による研究

155

東京理科大学

東京農工大学

非破壊パルス強磁場を用いたグラファイトの磁
場誘起密度波多重相の研究
矢口 宏

野口 大介

氏名

154

153 二次元遍歴電子磁性体の強磁場下での磁化過程

No.

Study of the magnetic-field induced multiple density-wave
state in graphite using non-destructive pulsed magnetic fields

Magnetic behavior of 2-dimensional itinerant electronicmagnets under high magnetic field

Title

Experiment of quantum oscillation by Bi nanowire

Characterization of single crystals of multiferroic system
YBaCuFeO5

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

工学部

理工学部

〃

大学院理学系研
究科

Kan Nakatsuji

Yasuhiro Hasegawa

Yukio Yasui

Marie Yoshikiyo

Asuka Namai〃

大学院理学系研
究科

Natsumi Ohta

Shyun KoshibaShin-ichi Ohkoshi〃

Electrical Properties of GaNAs/GaAs MQWs p-i-n junctions
grown by RF-MBE using modulated nitrogen radical beamsource大学院理学系研Study of magnetic oxide using terahertz spectroscopy
究科

大学院工学研究科

工学部〃

大学院理工学研
究科

Yasuyuki Yamazaki

Kengo Takamiya〃

大学院理工学研
究科

Yuko Nakai

Shyun Koshiba

Hirokazu Fukidome

Hiroyuki Yaguchi〃

High resolution XRD studies of nitride semiconductor nanometer superlattices by modulated beam epitaxy

Nanoscale control of many-body effects in 2D Dirac electron
systems

Takashi Mizokawa

Hiroshi Yaguchi

Daisuke Noguchi

Name

大学院理工学研 Optical characterization of individual isoelectronic traps innitrogen delta-doped semiconductors
究科

大学院工学研究科

工学部

電気通信研究所

大学院新領域創Laser photoemission study of impurity effect in Ca2-xSrxRuO4
成科学研究科

理工学部

大学院工学府

所属

Tokyo Institute ofTechnology

Saitama University

Meiji University

The University ofTokyo

The University ofTokyo

The University of
Tokyo

Kagawa University

Kagawa University

Saitama University

Saitama University

Saitama University

Kagawa University

Kagawa University

Tohoku University

The University of
Tokyo

Tokyo University of
SceinceTokyo Universityof Agriculture andTechnology

Organization

ISSP Activity Report 2013

73

仲村 愛
平仲 裕一
仲間 隆男
照屋 淳志

〃

希土類金属間化合物の高圧下における磁性と輸
送特性

〃

184

185

186

仲間 隆男

182 価数揺動物質の高圧力中輸送特性の研究

〃

小林 夏野

181 カルコパイライト CuFeS2 の低温磁性相の探索

183

平山 尚美

180 Mg2Si 単結晶および焼結体のホール測定

島田 祐樹

〃

179

非磁性基底二重項を持つ PrIr2Zn20 の磁場中比熱
鬼丸 孝博
測定

177
松本 圭介

飯塚 理子

鉄水素化物の高圧合成と地球のコアに溶け込む
水素量の推定

176

〃

広島大学

堀尾 眞史

〃

175

178

愛媛大学

岡崎 浩三

極低温超高分解能レーザー光電子分光装置による超伝導ギャップ測定

174

琉球大学

琉球大学

琉球大学

琉球大学

琉球大学

青山学院大学

東京理科大学

広島大学

広島大学

東京大学

東京大学

東京工業大学岡 研吾

BiCo1-x(Fe,Ni)xO3 のパルス強磁場中スピン状態
転移

名古屋大学

173

松川 周矢

〃

名古屋大学

東京大学

172

出口 和彦

171 強磁場による準結晶の量子臨界現象の研究

氏名
平原 徹

課題名

170 銀超薄膜上のシリセンの構造解析

No.

大学院理工学研
究科

理学部

Yuichi Hiranaka〃

Atsushi Teruya

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

大学院理工学研
究科

Ai Nakamura

Takao Nakama

Transport properties of valence fluctuating compounds underpressure〃

Kaya Kobayashi

Naomi Hirayama

Investigation of magnetic property in chalcopyrite CuFeS2

大学院理工学研
究科

理学部

理工学部

Hall measurement of single-crystalline and sinteredpolycrystalline Magnesium Silicide (Mg2Si)〃

大学院先端物質
科学研究科
基礎工学部

Keisuke Matsumoto〃

大学院先端物質科学研究科

Yuki Shimada

Takahiro Onimaru

大学院先端物質 Specific heat measurements in magnetic field on PrIr2Zn20
with the nonmagnetic doublet ground state
科学研究科

地球深部ダイナ
Synthesis of iron hydride at high pressure and study for
ミクス研究センhydrogen melting in core of the Earth
ター

Riko Iizuka

Masafumi Horio

大学院理学系研
究科〃

Kozo Okazaki

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

応用セラミック
Field induced spin-state transition in BiCo1-x(Fe,Ni)xO3
ス研究所
Kengo Oka

Shuya Matsukawa

大学院理学研究
科〃

Kazuhiko Deguchi

大学院理学研究 High magnetic field experiments of quantum criticalquasicrystal
科

Name
Toru Hirahara

Title

大学院理学系研
Structure analysis of silicene formed on ultrathin Ag films
究科所属

University of the
Ryukyus

University of the
Ryukyus

University of the
Ryukyus

University of the
Ryukyus

University of the
Ryukyus

Aoyama Gakuin
University

Tokyo University of
Sceince

Hiroshima University

Hiroshima University

Hiroshima University

Ehime University

The University ofTokyo

The University of
Tokyo

Tokyo Institute ofTechnology

Nagoya University

Nagoya University

The University ofTokyo

Organization

74

ISSP Activity Report 2013

希土類金属間化合物の高圧下における磁性と輸
送特性

187

古川 はづき石井 梨恵子呉 麻美子

空間反転対称性の破れた超伝導体のヘリカル磁束格子の観測

〃

〃

194

195

196

新しいボロン・クラスター系物質の開発と陽電子ビーム法による分析

〃

201

202

低次元頂点及び辺共有した四面体のフラスト
レーション効果と磁化過程〃

203

納谷 麻衣子浅野 貴行

今井 恵利華金沢 育三

石井 梨恵子ErNi2B2C とその関連物質における自発的磁束格
古川 はづき
子の観測

〃

200

199

198

古川 はづき

呉 麻美子

〃

193

197 Sr2RuO4 の異常金属状態の研究

石井 梨恵子〃192

古川 はづき坂野 昌人

極性層状ビスマス化合物におけるバルクとサブ表面のスピン分裂バンド構造

190

191 空間反転対称性の破れた超伝導体の結晶性評価

園部 竜也

角度分解光電子分光による鉄系超伝導体における擬ギャップの研究

本多 史憲

上門 太郎

氏名

189

188 EuCd11 の高圧下における電子状態の研究

課題名

No.

Name

〃

お茶の水女子大 大学院人間文化学
創成科学研究科〃

お茶の水女子大 大学院人間文化学
創成科学研究科

Maiko Naya

お茶の水女子大 大学院人間文化学
創成科学研究科

九州大学

東京学芸大学

東京学芸大学〃

Making of new boron-cluster materials and analysis by slowpositron beam

大学院理学研究 Frustration effect and magnetization process of lowdimensional corner-edge-sharing tetrahedron compounds
院

大学院教育学研
究科

自然科学系

Takayuki Asano

Erika Imai

Ikuzo Kanazawa

Rieko Ishii

お茶の水女子大 大学院人間文化学
創成科学研究科〃

Hazuki Furukawa

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

Hazuki Furukawa

お茶の水女子大 大学院人間文化
Anomalous vortex state of Sr2RuO4
学
創成科学研究科

Mamiko Kure

Kyushu University

Tokyo Gakugei
University

Tokyo Gakugei
University

Ochanomizu
University

Ochanomizu
University

Ochanomizu
University

Ochanomizu
University

Ochanomizu
University

Ochanomizu
University〃

お茶の水女子大 大学院人間文化学
創成科学研究科

Rieko Ishii

Ochanomizu
University

Ochanomizu
University

Ochanomizu
University

Ochanomizu
University

The University ofTokyo

The University ofTokyo

Tohoku University

University of the
Ryukyus

Organization

お茶の水女子大 大学院人間文化
Helical vortex phase on non-centrosymmetric superconductors Hazuki Furukawa
学
創成科学研究科

Mamiko Kure

Rieko Ishii〃

お茶の水女子大 大学院人間文化学
創成科学研究科

Masato Sakano

Tatsuya Sonobe

Fuminori Honda

Hazuki Furukawa

大学院工学系研 Spin-splitting in bulk and near surface of layered polar Bibased semiconductors
究科

大学院工学系研
APRES Study on Pseudogap in Iron-Pnictides
究科

金属材料研究所 Electronic state in EuCd11 under high pressure

大学院理工学研 Magnetism and transport properties of rare-earth intermetallic
Taro Uejyo
compounds under high pressure
究科

Title

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

東京大学

東京大学

東北大学

琉球大学

所属

ISSP Activity Report 201375

三津井 親彦
山岸 正和
中村 健一
吉本 和美

〃

〃

〃

〃

206

207

208

209

〃

磁化測定用対向アンビル型高圧力発生装置の開
発 (2)
木村 豊

中田 琢也

中田 琢也

佐藤 拓朗

大阪市立大学

山口大学

山口大学

東京大学

東京大学

大阪府立大学

大阪府立大学横浜国立大学

東京大学

愛媛大学

東京大学

東京大学

東京大学

九州大学

課題名

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

No.

1

シュタウス
スヴェン

氏名
東京大学

〃

Takuro Sato

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

所属

Sven Stauss

Name

Yutaka Kimura

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

Title

Takuya Nakada

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

大学院理工学研
Pressure effect on the electrical transport properties of LaFe2P2 Takuya Nakada
究科

大学院工学系研
究科

大学院工学系研 Studies of formation of charge ordered state and charge glass
state in theta-(BEDT-TTF) system
究科

Kazuya Miyagawa

Hirotsugu Miyagai

大学院理学系研
究科〃

Hironori Yamaguchi

大学院理学系研
NMR study of new spin-ladder material 3-Br-4-F-V
究科

Kazumi Yoshimoto
Hiroshi Nakatsugawa〃

大学院新領域創成科学研究科Ken-ichi Nakamura

Masakazu Yamagishi

大学院工学研究 Antiferromagnetism and thermoelectric properties in
La1-xCaxMnO3+δ
院

〃

工学部

〃

大学院新領域創成科学研究科The University ofTokyo

Organization

Osaka City University

Yamaguchi University

Yamaguchi University

The University ofTokyo

The University ofTokyo

Osaka Prefecture
University

Osaka Prefecture
University

Yokohama National
University

The University of
Tokyo

Ehime University

The University ofTokyo

The University ofTokyo

Chikahiko Mitsui〃

Kyushu University

Organization

大学院新領域創成科学研究科Yoichiro Kawami

Name

The University ofTokyo

Frustration effect and magnetization process of lowdimensional corner- edge-sharing tetrahedron compounds

Title

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

大学院理学府所属

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

217 超流動ヘリウム３-A 相の半整数量子渦の研究

216

宮外 浩嗣

山口 博則

theta-BEDT-TTF 塩の電荷秩序と電荷グラス形成
宮川 和也
に関する研究〃215 LaFe2P2 の輸送特性の圧力効果

214

213

212

211 新規梯子格子磁性体 3-Br-4-F-V の NMR 測定

La1-xCaxMnO3+δ の反強磁性と熱電特性に関する
中津川 博
研究

岡本 敏宏

熱耐久性を有する高性能塗布型有機トランジス
タ材料の開発205

210

川見 洋一郎氏名

低次元頂点及び辺共有した四面体のフラスト
レーション効果と磁化過程

課題名

204

No.

76

ISSP Activity Report 2013

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

パイロクロア型希土類酸化物の単結晶育成と磁気フラストレーションの研究

2

3

松平 和之

姫野 翔平

氏名

九州工業大学

東京大学

ぺロブスカイト型酸素キャリアを用いたケミカ
ルルーピングシステムの開発〃

ケミカルループ法の還元過程における酸化物イ
オン伝導体の担体効果〃

プロトン伝導性固体電解質を用いた有機ハイド
ライド脱水素・水素化の電極反応特性〃

金属酸化物の酸化還元を利用した蓄電システム
の開発

〃

3

4

5

6

7

8

9

10

〃

酸化物イオン伝導体とプロトン伝導体を用いた
新規二次電池の開発

1213

酸化セリウムナノマテリアルのキャラクタリ
ゼーション

〃

2

11

大友 順一郎

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1

大友 順一郎

梶 智大

佐々木 岳彦

高坂 文彦

大友 順一郎

野田 直人

大友 順一郎

菊池 典晃

東京大学

東京大学

東京大学

東京大学

東京大学

東京大学

東京大学

東京大学

東京大学

東京大学

オーチェン
ジェームス
オーチェン
大友 順一郎

東京大学

東京大学

東京大学

大友 順一郎

松本 祐太

氏名

課題名

No.

Title

Noriaki Kikuchi

Naoto Noda

大学院新領域創成科学研究科

Fumihiko Kosaka

大学院新領域創成科学研究科

大学院新領域創 Development of novel rechargeable battery utilizing oxide ion
conductor and proton conductor
成科学研究科

Junichiro Otomo

Tomohiro Kaji

大学院新領域創成科学研究科〃

Takehiko Sasaki

大学院新領域創Characterization for ceria-based nanomaterials
成科学研究科〃

Junichiro Otomo

大学院新領域創 Development of energy storage system using redox of metaloxide
成科学研究科〃

Junichiro Otomo

大学院新領域創 Electrochemical redox of organic chemical hydrides with
proton conducting solid electrolyte
成科学研究科〃

大学院新領域創成科学研究科

Ochieng JamesOCHIENG
Junichiro Otomo〃

大学院新領域創 Influence of the oxide ion conductor on the reduction processof a chemical-looping method
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 The study on perovskite based oxygen carrier materials for
CLC/CLR applications
成科学研究科

Junichiro Otomo

Yuta Matsumoto

大学院新領域創成科学研究科〃

Junichiro Otomo

Name

Kazuyuki Matsuhira

Shohei Himeno

Name

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

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

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

所属

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

課題名

No.

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

Kyushu Institute ofTechnology

The University ofTokyo

Organization

ISSP Activity Report 201377

大友 順一郎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

〃

15

16

豊田 新悟

〃

21

大友 順一郎生駒 健太郎
大友 順一郎固体酸化物形燃料電池の劣化挙動におけるイン
ピーダンススペクトルと電極構造の解析〃

高温高圧水を利用した有機修飾微粒子の連続式
合成技術の開発〃

超臨界水を反応場とした複合酸化物ナノ粒子の
合成

26

27

28

29

30

伊原 冬樹

大友 順一郎

磯貝 俊介

〃

25

大友 順一郎大石 淳矢

ケミカルループ法におけるカルシウムフェライ
ト系材料の酸化還元反応特性

〃

24

23

SOFC 空気極における製造プロセス由来微量成分
大友 順一郎の電極性能に対する影響評価

阿部 伸行

〃

20

22

有馬 孝尚

フラストレート磁性とスピン軌道相互作用の協調・競合効果

19

門田 稔

〃

高プロトン伝導性リン酸ガラス - セラミックスの大友 順一郎合成およびイオン伝導特性の解明

1817

櫻井 健一朗

酸化物イオン伝導体とプロトン伝導体を用いた
新規二次電池の開発

14

庄野 洋平

氏名

課題名

No.

東京大学

東京大学

東京大学

東京大学

東京大学

東京大学

東京大学

東京大学

東京大学

東京大学

東京大学

東京大学

東京大学

東京大学

東京大学

東京大学

東京大学

Title

Yohei Shono

大学院新領域創成科学研究科

Minoru Kadota

大学院新領域創成科学研究科Nobuyuki Abe〃〃

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The University ofTokyo

Fuyuki Ihara

大学院新領域創成科学研究科

大学院新領域創 Synthesis of nano-sized oxide particles using supercriticalwater as a reaction medium
成科学研究科

Junichiro Otomo

Kentaro Ikoma

大学院新領域創成科学研究科〃

Junichiro Otomo

大学院新領域創 The development of continuous synthesis of organic-modified
particles in high temperature and pressure water
成科学研究科〃

Junichiro Otomo

Analysis of electrochemical impedance spectra and electrode
大学院新領域創
structure for the identification of degradation mechanisms in
成科学研究科
solid oxide fuel cells

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo
Shunsuke Isogai

大学院新領域創成科学研究科〃The University ofTokyo

大学院新領域創 Redox kinetics of calcium ferrite materials in chemical looping
Junichiro Otomo
combustion
成科学研究科

Junya Oishi

大学院新領域創成科学研究科〃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

大学院新領域創 Evaluation of correlation between SOFC cathode performance
Junichiro Otomo
and trace element behavior in a SOFC production process
成科学研究科

Shingo Toyoda

Taka-hisa Arima

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

Junichiro Otomo

大学院新領域創 Synthesis of proton conducting phosphate glass-ceramics andelucidation of property of ion conduction
成科学研究科〃

Junichiro Otomo

Kenichiro Sakurai

Name

大学院新領域創 Development of proton conducting electrolyte for intermediate fuel cells
成科学研究科

大学院新領域創 Development of novel rechargeable battery utilizing oxide ion
conductor and proton conductor
成科学研究科所属

78

ISSP Activity Report 2013
糸井 充穂
植田 浩明
小林 慎太郎
後藤 真人

多重安定性を示す光誘起分子磁性体のサイズ効
果の研究

新規な相転移を示すフラストレート磁性体の物
性評価

〃

〃

32

33

34

35

細野 英司
齋藤 哲治

重田 出

新規磁石材料の微細構造解析

酸化物薄膜 / ナノ構造体の配向成長法の確立と物
中島 智彦
理特性制御
吉田 喜孝

ナノ構造制御に基づく環境、エネルギー材料の開発

金属炭化物微粒子の超伝導磁気特性

ハーフメタル型ホイスラー合金の磁性と輸送特性に関する研究

〃

39

40

41

42

43

44

〃

志村 元

長谷川 正

新規ペロヴスカイト系関連酸化物の磁気物性

46

47

廣井 政彦

ホイスラー型化合物の磁性と伝導の研究

45

春森 浩平

加藤 智嗣

〃

38

Title

工学部

名古屋大学

名古屋大学

鹿児島大学

鹿児島大学

鹿児島大学

Masashi Hasegawa
Gen Shimura

大学院工学研究
Magnetism of novel perovskite related oxides科
大学院工学研究科〃

Masahiko Hiroi

Kouhei Harumori

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

Nagoya University

Nagoya University

Kagoshima University

Kagoshima University

Iwaki-Meisei
University

大学院理工学研
究科

Yoshitaka Yoshida

Kagoshima University

Magnetic property in superconducting fine particles of metal
carbidesNational Institute ofAdvanced Industrial
Science and Technology

Chiba Institute ofTechnology

National Institute ofAdvanced Industrial
Science and Technology

The University ofTokyo

The University ofTokyo

The University ofTokyo

Kyoto University

Kyoto University

Kyoto University

Nihon University

The University ofTokyo

Organization

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

いわき明星大学 科学技術学部

Tomohiko Nakajima

Microstructural studies of newly developed permanent magnet
Tetsuji Saito
materials

産業技術総合研 先進製造プロセ Orientation growth and physical property of oxide thin films
and nanostructured materials
究所
ス研究部門

千葉工業大学Eiji Hosono

Satoshi Kato

大学院新領域創成科学研究科〃Sven Stauss

Keiichiro Urabe

大学院新領域創 Synthesis of diamondoids by pulsed-laser plasmas insupercritical CO2
成科学研究科

大学院新領域創 Spectroscopic plasma diagnostics of pulsed laser ablation
generated in supercritical carbon dioxide
成科学研究科〃

大学院理学研究科

Masato Goto

Shintaro Kobayashi〃

大学院理学研究科

Miho Itoi
Hiroaki Ueda

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

Akira Yoko

Name

大学院理学研究 Characterization of frustrated magnets with novel phasetransitions
科

医学部

大学院新領域創 Synthesis of nano-sized oxide particles using supercriticalwater as a reaction medium
成科学研究科所属

産業技術総合研 エネルギー技術 Development of the environmental and energy materials by
the nanostructure control
究所
研究部門

東京大学

シュタウス ス
東京大学
ヴェン

超臨界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

37

東京大学

占部 継一郎超臨界二酸化炭素中パルスレーザーアブレー
ションのプラズマ分光診断

京都大学

京都大学

京都大学

日本大学

東京大学

36

横 哲

超臨界水を反応場とした複合酸化物ナノ粒子の
合成

31

氏名

課題名

No.

ISSP Activity Report 2013

79

柳原 大輔

〃

52

金 俊燮

〃

55

横浜国立大学横浜国立大学横浜国立大学

東京大学

東京大学

東邦大学

伊藤 悠太
山田 翔太
設楽 航

カテコール縮環型 TTF 誘導体を用いた新規誘起伝導体の合成と構造、性質

プロトン - 電子相関系分子性導体の重水素効果

低次元電子系の高周波伝導率の測定

2

3

4

東京理科大学

東邦大学

東京理科大学氏名

銅酸化物高温超伝導体 Bi2212 の極紫外レーザー
山本 貴士
時間分解 ARPES

課題名

東京大学

1

No.

氏名

Mn および Cr を含む (Fe,Mg)2SiO4 単結晶の合成 杉浦 直治

課題名

長期留学研究員（Long Term Young Researcher）

1

No.

Title

〃

大学院新領域創成科学研究科

大学院工学府大学院工学府

Title

Title

Yuta Ito
Shota Yamada
Wataru Shitara

大学院理学研究 Deutelation effect of proton-electron correlated molecular
conductor
科
大学院基礎工学 Measurement of the high-frequency conductivities of the lowdimensional electron systems
研究科

Takashi Yamamoto

Name

Naoji Sugiura

Name

KIM JUNSEOPLee donghae

Mahoto Takeda

Yanagihara Daisuke

Kouichi Kitahara

大学院理学研究 Synthesis, structures, and properties of novel organic
conductors based on catechol-fused TTF derivatives
科

大学院理学研究 EUV-laser time and angle resolved photoemission of hightemperature cuprate Bi2212
科

所属

大学院理学系研 Synthesis of (Fe,Mg)2SiO4 single crystals doped with Mn and
Cr
究科

所属

〃

〃

大学院工学研究 Precipitation behavior and magnetic properties of finemagnetic particles in Cu-X base alloys
院〃

大学院新領域創成科学研究科Tokyo University of
SceinceToho University

Toho University

Tokyo University of
SceinceOrganization

The University ofTokyo

Organization

Yokohama National
Univirsity

Yokohama National
University

Yokohama National
University

The University ofTokyo

The University ofTokyo

The University ofTokyo

Yoshiki Takagiwa〃

大学院新領域創成科学研究科Tokyo University of
SceinceOrganization

The University of
Tokyo

Takanobu Hiroto

Name

大学院新領域創Electronic properties of group 13 elements-based cluster solids Kaoru Kimura
成科学研究科

大学院基礎工学 Crystal structures, electric and magnetic properties of alloys
composed of icosahedral rare-earth cluster
研究科

所属

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

李 東海

〃

54

Cu-X（X=Co, Fe, Ni）系合金中の磁性微粒子析
竹田 真帆人出過程と磁気特性の関係

北原 功一

〃

51

53

高際 良樹

〃

50

東京大学

東京大学

13 族クラスター固体の電子物性に関する研究

49

木村 薫

東京理科大学

氏名

正 20 面体希土類クラスターを特徴とする金属合廣戸 孝信
金の構造、電子物性と磁性

課題名

48

No.

80

ISSP Activity Report 2013

課題名

琉球大学
琉球大学
山口大学

名古屋大学
名古屋大学
名古屋大学
東北大学

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

新しい重い電子系超伝導体 CePt2In7 の磁気反射
阿曽 尚文
の探索
藤原 哲也
藤原 哲也
門脇 広明
元屋 清一郎
元屋 清一郎南部 雄亮

重い電子系新物質 Ce2Pt3Ge5 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

時間分割中性子散乱測定による磁気構造変化過程の実時間追跡

磁気構造の長時間変化と磁性原子希釈効果

AFeAs (A = Li, Na) の超伝導対称性

強磁性超伝導体 UCoGe におけるスピン揺らぎの
佐藤 憲昭
研究
佐藤 憲昭

EuCo2P2 の磁気構造解析

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

重い電子系超伝導体 CeRhxIr1-xIn5 における磁性佐藤 憲昭と超伝導の相関の研究

Dy3Al5O12 ガーネットにおけるクーロン相の探
索

4

5

6

7

8

9

10

11

12

13

14

15

佐藤 卓

北海道大学

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

3

東北大学

東京理科大学

東京理科大学首都大学東京

山口大学

北海道大学

網塚 浩

重い電子系 URu2Si2 の磁気励起

2

東北大学

佐藤 卓

氏名

GPTAS（汎用 3 軸中性子分光器）IRT 課題

課題名

氏名

1

・申請装置 4G: GPTAS

No.

中性子（Neutron Scattering Researcher）

No.

Hirsohi Amitsuka

多元物質科学研
Search for Coulomb phase in the Dy3Al5O12 garnet
究所

Taku J Sato

Tohoku University

Nagoya University

Study on the correlation of magnetism and superconductivity
大学院理学研究in CeRhxIr1-xIn5科

Noriaki Sato

Nagoya University

Nagoya University

大学院理学研究 Study on the quantum criticality and correlation of magnetism
Noriaki Satoand superconductivity in CeTe3 and TbTe3
科

大学院理学研究 Study on spin fluctuations of the superconducting ferromagnet
Noriaki Sato
UCoGe
科

Tohoku University

Tokyo University of
Science

Dilution effect of magnetic atoms on the long-time variation of
Kiyoichiro Motoya
magnetic structure
Yusuke Nambu

Tokyo University of
ScienceTokyo Metropolitan
University

Yamaguchi University

Yamaguchi University

University of the
Ryukyus

University of the
Ryukyus

Hokkaido University

Hokkaido University

Tohoku University

Organization

Organization

Real-time observation of magnetic structural change by means
Kiyoichiro Motoya
of time-resolved neutron scattering experiments

Hiroaki Kadowaki

Tetsuya Fujiwara

Magnetic structure analysis of new heavy fermion material
Ce2Pt3Ge5
Topological phase transitions in spin ice

Tetsuya Fujiwara

Naofumi Aso

Magnetic structure analysis of EuCo2P2

多元物質科学研
Superconducting pairing symmetry in AFeAs (A = Li, Na)
究所

理工学部

理工学部

理工学研究科

理工学研究科

理工学研究科

理学部物質地球 Search for magnetic reflections in a new heavy fermion
superconductor CePt2In7
科学科

理学部物質地球 Incommensurate magnetic structure in a non-centrosymmetric
Naofumi Aso
superconductor CeIrSi3
科学科

大学院理学研究 Magnetic ordering structure and excitation in La1-xUxRu2Si2
院 物理学部門 (x > 0.9)

Hirsohi Amitsuka

大学院理学研究
Magnetic excitation of heavy-electron system URu2Si2
院 物理学部門

Name

Name

Taku J Sato

Title

Title

多元物質科学研
IRT: GPTAS (Triple Axis Spectrometer)
究所

所属

所属

ISSP Activity Report 2013

81

李 哲虎
藤原 哲也
古川 はづき松浦 直人

鉄系超伝導体のスピン揺動

EuRu2P2 の磁気構造解析

パイロクア磁性体における格子―軌道―スピン
観測とスピン流、異常ホール効果への影響

電子誘電性を示す分子性有機導体
θ -(BEDT-TTF)2CsZn(SCN)4 における格子ダイ
ナミクスの研究

21

22

23

24

東北大学
九州工業大学

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

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

27

東北大学

26

東京大学
東京大学
東京大学
東北大学

萩原 雅人

一次元鎖量子磁性体 LiCuVO4 の SDW2 相での弾
萩原 雅人
性散乱測定

スピンギャップ系物質 Pb2V3O9 の磁気構造と磁
益田 隆嗣
気励起

電子誘電性を示す分子性有機導体 β'-(BEDTTTF)2ICl2 における格子ダイナミクスの研究

29

30

31

松浦 直人

Effect of uniaxial stress on ordered state in U-based heavyfermion compound

理工学研究科
Magnetic structure analysis of EuRu2P2

Magnetic structure and magnetic excitation in the spin gap
material Pb2V3O9

Neutron diffraction at SDW2 phase on one dimensional
quantum magnetic LiCuVO4Magnetic excitation of one dimensional quantum frustrated
chain CaCuVO4(OD)

Investigation of lattice dynamics reflecting electronic
金属材料研究所 ferroelectricity in a charge-transfer complex β'-(BEDTTTF)2ICl2

物性研究所

物性研究所

物性研究所

Masato Matsuura

Takatsugu Masuda

Masato Hagihala

Masato Hagihala

Masanori Enoki

大学院工学研究
Study of magnetic excitation dispassion in Bi2201 by
院物質工学研究measurement of high-energy excitation
系

Takatsugu Masuda
Koichi Hayashi

IRT: PONTA (Polarized Neutron Triple Axis Spectrometer)

Masato Matsuura

Hazuki Furukawa

Tetsuya Fujiwara

Chul-Ho Lee

Makoto Yokoyama

金属材料研究所 IRT: PONTA (Polarized Neutron Triple Axis Spectrometer)

物性研究所

Investigation of lattice dynamics reflecting electronic
金属材料研究所 ferroelectricity in a charge-transfer complex θ-(BEDTTTF)2CsZn(SCN)4

お茶の水女子大 大学院人間文化
Neutron study on pyrochlore oxide materials
学
創成科学研究科

山口大学

東京大学

一次元フラストレート鎖量子磁性体 CaCuVO4（OD) の磁気励起

理学部

Tohoku University

The University ofTokyo

The University ofTokyo

The University ofTokyo

Kyushu Institute ofTechnology

Tohoku University

The University ofTokyo

Tohoku University

Ochanomizu
University

Yamaguchi University

National Institute ofAdvanced Industrial
Science and Technology

Ibaraki University

Tokyo University of
Science, Suwa

Kyoto University

Yamaguchi University

Toru Shigeoka

Successive components-separated magnetic transitions in
HoRh2Si2

Organization

Hirotake Shigematsu Yamaguchi University

Name

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

Title

産業技術総合研 エネルギー技術
Spin fluctuations of iron-based superconductors
究所
研究部門

茨城大学

PONTA（高性能偏極中性子散乱装置）IRT 課題 益田 隆嗣

28

理工学研究科

教育学部

所属

Dynamic spin correlations of itinerant-electron frustrated
大学院工学研究
magnets in the vicinity of a FM-QCP Fe3Mo3N and its coYoshikazu Tabata
科材料工学専攻
substituted systems
Superexchange interaction of hexagonal ferrites
諏訪東京理科大システム工学部 (Ba1-xSrx)2Zn2Fe12O22 and Ba(Fe1-xScx)12O19 studied by neutron Shigenori Utsumi
学
diffraction

京都大学

山口大学

山口大学

25

・申請装置 5G: PONTA

横山 淳

重い電子系ウラン化合物の秩序状態に対する一
軸応力効果

20

19

強磁性量子臨界点近傍の遍歴電子フラストレー
ト磁性体 Fe3Mo3N およびその Co 置換系の動的 田畑 吉計
スピン相関
中性子回折による六方晶フェライト(Ba1-xSrx)2Zn2Fe12O22 および Ba(Fe1-xScx)12O19 内海 重宜の超交換相互作用研究

繁岡 透

HoRh2Si2 の成分分離逐次磁気転移

17

18

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

氏名

課題名

No.

82

ISSP Activity Report 2013
秋田大学
秋田大学

元屋 清一郎
茂吉 武人
茂吉 武人
中島 多朗
中野 岳仁
南部 雄亮
左右田 稔
左右田 稔
田畑 吉計
高津 浩

留野 泉
安井 幸夫
長谷 正司
長谷 正司

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

三角格子系 NaxNiO2 の磁気構造

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

偏極中性子回折によるアルカリ金属ナノクラス
ター強磁性体の研究

NiGa2S4 におけるスピンネマティック相関の検出

カゴメ格子・三角格子積層系 YBaCo4O7 の磁気励起

A2CoSi2O7(A=Ca and Ba) におけるエレクトロマグノン

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

導電性三角格子磁性体 PdCrO2 の反強磁性秩序と異常伝導秩序型ペロブスカイト CaCu3Ti4O12 のフォノン 留野 泉
留野 泉

磁気構造の長時間変化と磁性原子希釈効果

立方晶 BaTiO3 のフォノンの温度依存性

Pr0.5Sr0.5MnO3 の高温フォノン

PbCuSO4(OH)2 の磁場によって誘起される新奇量子相

偏極中性子を用いた Cu3Mo2O9 単結晶の磁気構
造の決定(CuZn)3Mo2O9 単結晶の磁気反射の測定

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

Name

Magnetic structure of a triangular system NaxNiO2Disorder effects on the long-time variation of magnetic
structure in a multistep metamagnet Ca3Co2O6

Electromagnon in A2CoSi2O7 (A=Ca and Ba)

Magnetic excitation of YBaCo4O7 with kagome and triangularlattices

Minoru Soda

Minoru Soda

Yusuke Nambu

Takehito Nakano

理工学部

教育文化学部

教育文化学部

教育文化学部

理工学研究科
物理学専攻

Magnetic-field-induced anomalous quantum phase of
PbCuSO4(OH)2)

Phonon in Pr0.5Mn0.5MnO3 at high temperature

Temperature dependence of phonons in cubic BaTiO3

Phonons in ordered perovskite CaCu3Ti4O12

Antiferromagnetism and its relation to the anomalous
conductivity in the metallic triangular-lattice magnet PdCrO2

Yukio Yasui

Izumi Tomeno

Izumi Tomeno

Izumi Tomeno

Hiroshi Takatsu

大学院工学研究 Anomalous spin dynamics in the magnetic ordered state of the
Yoshikazu Tabata
科材料工学専攻 diluted Ising antiferromagnet HoxY1-xRu2Si2

物性研究所

物性研究所

多元物質科学研 Detection of spin nematic correlation in the 2D magnet
NiGa2S4
究所

理学研究科物理 Neutron diffraction study on ferromagnetism of alkali-metal
nanocluster array by spin-polarized beam
学専攻

Taro Nakajima

Taketo Moyoshi

Taketo Moyoshi

物理 Dilution effect of magnetic atoms on the long-time variation of
Kiyoichiro Motoya
magnetic structure

物理 Real-time observation of magnetic structural change by means
Kiyoichiro Motoya
of time-resolved neutron scattering experiments

Title

理学部物理学教 Biaxial-pressure control of multiferroic domain structure in
spin-driven ME multiferroic CuFeO2
室

理工学部

理工学部

理工学部
学科

理工学部
学科

所属

量子ビームユDetermination of the magnetic structure of a Cu3Mo2O9 single
物質・材料研究
Masashi Hase
ニット中性子散
crystal using polarized neutrons
機構
乱グループ
量子ビームユInvestigation of magnetic reflections in a (CuZn)3Mo2O9 single
物質・材料研究
Masashi Hase
ニット中性子散
crystal
機構
乱グループ

明治大学

秋田大学

首都大学東京

京都大学

東京大学

東京大学

東北大学

大阪大学

東京理科大学

東京理科大学

東京理科大学

東京理科大学元屋 清一郎時間分割中性子散乱測定による磁気構造変化過程の実時間追跡32

東京理科大学

氏名

課題名

No.

National Institute forMaterials Science

National Institute forMaterials Science

Meiji University

Akita University

Akita University

Akita University

Tokyo Metropolitan
University

Kyoto University

The University ofTokyo

The University ofTokyo

Tohoku University

Osaka University

Tokyo University of
ScienceTokyo University of
ScienceTokyo University of
ScienceTokyo University of
ScienceTokyo University of
ScienceOrganization

ISSP Activity Report 2013

83

課題名

混晶系 Ba1-xCaxTiO3 のフォノン

茨城大学
北海道大学
琉球大学

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

空間反転対称性をもたない超伝導体 CeRhSi3 の
磁気励起

62

63

東北大学

広島大学

広島大学

Izumi Tomeno

Name

Masaki Fujita

Masaki Fujita

An order parameter enhanced by magnetic field in the Kondo
semiconductor CeOs4Sb12

Search for a quadrupole ordering due to a non-Kramers
doublet in PrIr2Zn20

Study on dynamical spin hierarchical structure in itinerantelectron antiferromagnet Mn3Si

理学部物質地球 Magnetic fluctuations in a non-centrosymmetricsuperconductor CeRhSi3
科学科

大学院理学研究 Magnetic ordering structure and excitation in La1-xUxRu2Si2
院 物理学部門 (x > 0.9)

Naofumi Aso

Hirsohi Amitsuka

Makoto Yokoyama

Keisuke Tomiyasu

Diffraction and inelastic scattering studies of decomposition
高等教育開発推
process in hydrogen storage material, hydride with aluminum
進センター
complex

IRT: HER (High Energy Resolution Triple-Axis Spectrometer)

Takeshi Matsumura

大学院先端物質
Magnetic octupole order in Ce0.5La0.5B6
科学研究科

理学部理学科

Takeshi Matsumura

大学院先端物質
Pressure induced antiferroquadrupole order in CeTe
科学研究科

Keitaro Kuwahara

Kazuaki Iwasa

Kazuaki Iwasa

Haruhiro Hiraka

Thermal evolution of magnetic correlations in novel frustrated
Masaki Fujita
spin-ladder system BiCu2PO6

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

Study of spin correlations in novel T'-structured cuprate oxide
Pr2-xCaxCuO4

理工学研究科応
Neutron diffraction study of Ce0.7La0.3B6 under uniaxial
茨城大学大学院 用粒子線科学専
pressure
攻HER ( 高エネルギー分解能３軸型中性子分光器 )横山 淳
IRT 課題阿曽 尚文

金属材料研究所

金属材料研究所

金属材料研究所

金属材料研究所

東北大学大学院 理学研究科

61

・申請装置 C1-1: HER

富安 啓輔

水素貯蔵材料アルミニウム錯体水素化物における水素放出過程の回折と非弾性散乱による研究

60

桑原 慶太郎Ce0.7La0.3B6 の一軸圧下中性子回折

57

松村 武

岩佐 和晃

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

56

Ce0.5La0.5B6 における磁気八極子秩序の検証

岩佐 和晃

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

55

59

東北大学

平賀 晴弘

遍歴電子反強磁性体 Mn3Si における動的スピン階層構造の研究

54

松村 武

東北大学

新規フラストレーションスピン梯子系 BiCu2PO6
藤田 全基における磁気相関の温度発展

53

CeTe における圧力誘起反強四極子秩序

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

52

58

東北大学

新規 T' 構造ホールドープ銅酸化物 Pr2-xCaxCuO4
藤田 全基
における磁気相関の研究

51

Phonons in Ba1-xCaxTiO3

Title

大学院理学研究 IRT: TOPAN (Tohoku-University Polarization Analysis Neutron
Kazuaki Iwasa
Spectrometer)科

教育文化学部所属

東北大学大学院 理学研究科

東北大学

秋田大学

TOPAN（東北大理：３軸型偏極中性子分光器）
岩佐 和晃
IRT 課題

留野 泉

氏名

50

・申請装置 6G: TOPAN

49

No.

University of the
Ryukyus

Hokkaido University

Ibaraki University

Tohoku University

Hiroshima University

Hiroshima University

Ibaraki University

Tohoku University

Tohoku University

Tohoku University

Tohoku University

Tohoku University

Tohoku University

Tohoku University

Akita University

Organization

84

ISSP Activity Report 2013
東北大学
東京大学

新規フラストレーションスピン梯子系 BiCu2PO6
藤田 全基における磁気相関の温度発展

一次元フラストレート鎖量子磁性体 CaCuVO4（OD) の磁気励起

68

69

東京大学
東京理科大学

名古屋大学
名古屋大学
名古屋大学
東北大学

益田 隆嗣

スピンギャップ系物質 Pb2V3O9 の磁気構造と磁
益田 隆嗣
気励起
満田 節生
南部 雄亮
南部 雄亮

スピン格子結合系 CuFeO2 のスピン波分散関係の一軸応力変化

鉄系スピンラダー BaFe2Se3 の磁気揺動

AFeAs (A = Li, Na) の超伝導対称性

強磁性超伝導体 UCoGe におけるスピン揺らぎの
佐藤 憲昭
研究
佐藤 憲昭

スピン・ネマティック相関の検出

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

重い電子系超伝導体 CeRhxIr1-xIn5 における磁性佐藤 憲昭と超伝導の相関の研究

量子スピン反強磁性三量体系 2b 3CuCl2 2H2O
の磁気励起

72

73

74

75

76

77

78

79

80

佐藤 卓

東京大学

門脇 広明

量子スピンアイスの研究

71

東北大学

東北大学

首都大学東京

岩佐 和晃

DyFe2Zn20 における異方性変化を伴う逐次磁気
相転移

70

Title

物性研究所

金属材料研究所

金属材料研究所

金属材料研究所

Yusuke Nambu

多元物質科学研
Superconducting pairing symmetry in AFeAs (A = Li, Na)
究所

多元物質科学研 Magnetic excitations in quantum spin antiferromagnetic trimer
Taku J Satosystem 2b 3CuCl2 2H2O
究所

Tohoku University

Nagoya University

Study on the correlation of magnetism and superconductivity
大学院理学研究in CeRhxIr1-xIn5科

Noriaki Sato

Nagoya University

Nagoya University

Tohoku University

Tohoku University

Tokyo University of
Science

The University ofTokyo

The University of
Tokyo

Tokyo Metropolitan
University

Tohoku University

The University ofTokyo

Tohoku University

Tohoku University

Tohoku University

Kyushu Institute ofTechnology

University of the
Ryukyus

Organization

大学院理学研究 Study on the quantum criticality and correlation of magnetism
Noriaki Satoand superconductivity in CeTe3 and TbTe3
科

大学院理学研究 Study on spin fluctuations of the superconducting ferromagnet
Noriaki Sato
UCoGe
科

Yusuke Nambu

多元物質科学研 Spin dynamics of the iron-based spin ladder compoundBaFe2Se3
究所

Takatsugu Masuda

Takatsugu Masuda

Hiroaki Kadowaki

Kazuaki Iwasa

Masato Hagihala

Setsuo Mitsuda

Magnetic structure and magnetic excitation in the spin gap
material Pb2V3O9

Detection of spin nematic correlation

Quantum spin ice

Successive magnetic phase transition accompanying drastic
variation in magnetic anisotropy of DyFe2Zn20

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

理学部物理学教 Spin wave dispersion relation in a spin-lattice coupled system
CuFeO2 under uniaxial stress
室

物性研究所

物性研究所

理工学研究科

Masaki Fujita

Masaki Fujita

Masanori Enoki

Naofumi Aso

Name

Thermal evolution of magnetic correlations in novel frustrated
Masaki Fujita
spin-ladder system BiCu2PO6

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

Study of spin correlations in novel T'-structured cuprate oxide
Pr2-xCaxCuO4

大学院工学研究
Study of magnetic excitation dispassion in Bi2201 by
院物質工学研究measurement of high-energy excitation
系

理学部物質地球 Magnetic excitations in YbCo2Zn20 in vicinity of a quantum
critical point
科学科

所属

東北大学大学院 理学研究科

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

67

萩原 雅人

東北大学

新規 T' 構造ホールドープ銅酸化物 Pr2-xCaxCuO4
藤田 全基
における磁気相関の研究

66

琉球大学
九州工業大学阿曽 尚文

氏名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

量子臨界点近傍にある YbCo2Zn20 の磁気励起

課題名

65

64

No.

ISSP Activity Report 2013

85

富安 啓輔

電荷スピン両フラストレート系 1147 フェライト
蒲沢 和也の中性子散乱による電気磁気効果探査
李 哲虎
繁岡 透

水素貯蔵材料アルミニウム錯体水素化物における水素放出過程の回折と非弾性散乱による研究

鉄系超伝導体のスピン揺動

PrRh2Ge2 の逐次磁気転移

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

86

87

88

89

90

Title

物性研究所

物性研究所
Electromagnon in A2CoSi2O7 (A=Ca and Ba)

Magnetic excitation of YBaCo4O7 with kagome and triangularlattices

多元物質科学研
Search for Coulomb phase in the Dy3Al5O12 garnet
究所

所属

東京大学

藤井 健太
藤井 健太
古川 はづき古川 はづき時分割 SANS 測定によるイオン液体中で特有なゲル化反応速度論の構造化学的研究

phosphonate 型イオン液体を溶解剤とするセル
ロースの溶存構造

空間反転対称性の破れた超伝導体のヘリカル磁束格子の観測新規 Fe 系超伝導体の磁束格子実験

93

94

95

96

Kenta Fujii

Mitsuhiro Shibayama

Hazuki Furukawa

Ochanomizu
University

The University ofTokyo

The University ofTokyo

The University of
Tokyo

Saga University

Saga University

Yamaguchi University

お茶の水女子大 大学院人間文化 SANS experiment on flux line lattice on new Fe pnictide
学
創成科学研究科 superconductors

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

Gelation process of tetra-PEG ion gel studied by time-resolved
small angle neutron scattering

IRT: SANS-U (Small Angle Neutron Scattering Instrument)

Xu-Guang Zheng

Xu-Guang Zheng

Toru Shigeoka

National Institute ofAdvanced Industrial
Science and Technology

CROSS-Tokai

Tohoku University

Tokyo Institute ofTechnology

Kyoto University

The University ofTokyo

The University ofTokyo

Tohoku University

Organization

Ochanomizu
University

物性研究所

物性研究所

物性研究所

大学院工学系研 Investigation of spin fluctuations in atacamite-type pyrochlore
compounds Mn2(OD)3Cl and Mn2(OD)3Br
究科

Successive magnetic transitions in PrRh2Ge2

Chul-Ho Lee

Kazuya Kamazawa

Keisuke Tomiyasu

Hidekazu Tanaka

Yoshikazu Tabata

Minoru Soda

Minoru Soda

Taku J SatoName

お茶の水女子大 大学院人間文化
Helical vortex phase on non-centrosymmetric superconductors Hazuki Furukawa
学
創成科学研究科

東京大学

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

佐賀大学

大学院工学系研
究科

理工学研究科

産業技術総合研 エネルギー技術
Spin fluctuations of iron-based superconductors
究所
研究部門

Dynamic spin correlations of itinerant-electron frustrated
大学院工学研究
magnets in the vicinity of a FM-QCP Fe3Mo3N and its co科材料工学専攻
substituted systems
大学院理工学研
Quantum renormalization of magnetic excitations in S=1/2
東京工業大学
究科物性物理学
triangular lattice Heisenberg antiferromagnet Ba3CoSb2O9
専攻
Diffraction and inelastic scattering studies of decomposition
高等教育開発推
process in hydrogen storage material, hydride with aluminum
東北大学
進センター
complex
Neutron scattering study for both charge and spin frustrated
総合科学研究機 東海事業セン
system of the 4th pyrochlore lattice of cubic 1147 ferrite
構
ター
HoBaFe4O7

京都大学

東京大学

92

・申請装置 C1-2: SANS-U

鄭 旭光

田中 秀数

S=1/2 三角格子ハイゼンベルク反強磁性体
Ba3CoSb2O9 の磁気励起と量子再規格化

85

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

佐賀大学

強磁性量子臨界点近傍の遍歴電子フラストレー
ト磁性体 Fe3Mo3N およびその Co 置換系の動的 田畑 吉計
スピン相関

84

91

山口大学

左右田 稔

A2CoSi2O7(A=Ca and Ba) におけるエレクトロ
マグノン

83

東京大学

左右田 稔

カゴメ格子・三角格子積層系 YBaCo4O7 の磁気
励起

82

東北大学

佐藤 卓

Dy3Al5O12 ガーネットにおけるクーロン相の探
索

81

氏名

課題名

No.

86

ISSP Activity Report 2013
松浦 直人

超巨大磁気抵抗を示すペロブスカイト型マンガ
ン酸化物における自己相似プロファイルの研究

104

中野 実
中野 実
貞包 浩一朗107 膜脂質のダイナミクスに及ぼす膜の曲率の評価

108 界面不活性の働きをする界面活性剤

柴山 充弘

113 温度応答性部位を有する Tetra ゲルの構造解析

PEG/PDMS 相互連結相構造を有する高分子ゲル
酒井 崇匡
の構造解析

111
柴山 充弘

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110112 毛髪の内部構造解析

貞包 浩一朗高圧条件下における 2 成分混合溶液の新奇な臨
界挙動

109

106

膜貫通ペプチドのフリップフロップ誘起能の評
価

中野 実

松岡 秀樹

温度および塩濃度応答性界面不活性／界面活性転移高分子のミセル形成とナノ構造転移

103

105 POPC ナノディスクの構造とダイナミクス

松葉 豪

架橋点が疎水性相互作用からなる非晶性高分子
ゲルの広い空間スケールでの構造

川端 庸平

非イオン界面活性剤水溶液で形成されるベシク
101 ルの臨界ベシクル濃度近傍での構造とダイナミ
クス

102

金谷 利治

100 エポキシ樹脂の重合誘起相分離と架橋構造

東京大学

東京大学

東京大学

Static and dynamic structures of vesicles near the critical
Youhei Kawabata
vesicle concentration in a nonionic surfactant aqueous solution

Investigation of power law profile of the ferromagnetic clusterin perovskite manganite

物性研究所

物性研究所

工学系研究科

Structural analysis of thermo-responsive Tetra-gel

Structural analysis of hair

Structural study on end-linked PEG/PDMS hydrogels

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

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

Mitsuhiro Shibayama

Mitsuhiro Shibayama

Takamasa Sakai

Koichiro Sadakane

Koichiro Sadakane

Koichiro Sadakane

Minoru Nakano

医学薬学研究部
Effects of curvature on dynamics of membrane lipids（薬学）
Amphiphilic molecules acting as a surface inactive substance

Minoru Nakano

医学薬学研究部
Induction of flip-flop by transmembrane peptides（薬学）

Minoru Nakano

Masato Matsuura

Micelle formation and nanostructure transition of temperatureand salt concentration responsive non-surface active/surface
Hideki Matsuoka
active transition polymers

医学薬学研究部
Structure and dynamics of POPC nanodiscs（薬学）

金属材料研究所

工学研究科

The University ofTokyo

The University ofTokyo

The University of
Tokyo

KEK

KEK

KEK

University of Toyama

University of Toyama

University of Toyama

Tohoku University

Kyoto University

Yamagata University

Tokyo Metropolitan
University

Kyoto University

Polymerization induced phase separation of epoxy resin andnetwork structure
Toshiji Kanaya

Doshisha University

Ochanomizu
University

Ochanomizu
University

Organization

Structural analysis of thickener in grease under shear stress by
Tomoko Hirayama
means of Rheo-SANS

大学院理工学研 Wide spatial scale structure of hydrophobic crosslinked gels in
Go Matsuba
amorphous polymers
究科

理工学研究科

化学研究所

理工学部

物質構造科学研
高エネルギー加究所中性子研究
速器研究機構系
物質構造科学研
高エネルギー加究所中性子研究
速器研究機構系
物質構造科学研
高エネルギー加究所中性子研究
速器研究機構系

富山大学大学院

富山大学大学院

富山大学大学院

東北大学

京都大学

山形大学

首都大学東京

京都大学

同志社大学

Rheo-SANS を用いたずり応力場におけるグリー
平山 朋子
ス増ちょう剤の構造解析

Hazuki Furukawa99

古川 はづきお茶の水女子大 大学院人間文化 Anomalous vortex state in Sr2RuO4 studied by SANS
学
創成科学研究科 experiments

Name

中性子小角散乱実験による Sr2RuO4 の異常金属
状態の研究

Title

98

所属
お茶の水女子大 大学院人間文化 Anomalous magnetic form factor in the vortex state on CeMIn5
Hazuki Furukawa
学
創成科学研究科 (M=Co, Ir)

氏名

希釈冷凍機温度領域における CeMIn5(M=Co, Ir)
古川 はづきの磁束の磁気形状因子の異常

課題名

97

No.

ISSP Activity Report 2013

87

氏名

京都大学

名古屋大学
名古屋大学
福岡大学

杉山 正明
高橋 宏明
高椋 利幸
高椋 利幸
高野 敦志

糖鎖クラスターを修飾した巨大錯体分子の構造解析

含水飽和圧縮モンモリロナイトの原子炉型中性子小角散乱によるキャラクタリゼーション

イミダゾリウム系イオン液体とベンゼン誘導体との混合状態120

121

122 イオン液体によるタンパク質３次構造の安定化

結び目を有する環状高分子の溶液中のコンフォ
メーション

119

（環状高分子 + 線状高分子）ブレンド試料中の環124 状高分子の回転半径に及ぼす線状高分子の添加 高野 敦志
効果

125 イオン液体と界面活性剤の混合物の相分離現象

生理活性を持つリン脂質二重膜のメゾスコピッ
ク物性研究

多分岐ポリエチレンオキサイドを用いたイオン
ゲルの網目構造とその溶媒効果

130 Fe 系超伝導体の磁束研究

129

128 DNA 界面密生相の構造物性解析

127

古川 はづき

藤井 健太

藤田 雅弘

遠藤 仁

中性子スピンエコー法を基軸とした
126 Staphylococcal nuclease の水溶液中でのメゾス 遠藤 仁
コピックダイナミクス研究

吉田 亨次

京都大学

α - シヌクレインにおける初期会合過程のその場
杉山 正明
観測

118

123

東京大学

柴山 充弘

117 フェノール樹脂ゲル化過程の不均一性解析

理学部

Phase separation of ionic liquids and surfactant mixtures

大学院工学研究
科化学・生物工 Conformation of knotted ring polymers in solutions
学専攻
大学院工学研究
Addition effect of linear polymer in ring/linear polymer blend
科化学・生物工on radius of gyration of ring polymer
学専攻

Vortex study on Fe-based superconductors

物性研究所中性
Solvent effect on the network structure of Tetra-PEG ion gel
子科学研究施設

前田バイオ工学
Structural and physical properties of DNA brush layer
研究室

お茶の水女子大 大学院人間文化学
創成科学研究科

東京大学

理化学研究所

日本原子力研究 量子ビーム応用
Mesoscopic properties of bioactive lipid bilayer
開発機構
研究部門

Hazuki Furukawa

Kenta Fujii

Masahiro Fujita

Hitoshi Endo

Hitoshi Endo

Koji Yoshida

Atsushi Takano

Atsushi Takano

Ochanomizu
University

The University of
Tokyo

RIKEN

Japan Atomic Energy
AgencyJapan Atomic Energy
AgencyFukuoka University

Nagoya University

Nagoya University

Toshiyuki Takamuku Saga University

Tohoku University

大学院工学系研
Stabilization of tertiary structure of proteins by ionic liquids
究科

Hiroaki Takahashi

Characterization of water-saturated compacted
montmorillonites by reactor type small-angle neutron
scattering

Kyoto University

Kyoto University

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

Organization

Toshiyuki Takamuku Saga University

Masaaki Sugiyama

Masaaki Sugiyama

Mitsuhiro Shibayama

Mitsuhiro Shibayama

Mitsuhiro Shibayama

Mitsuhiro Shibayama

Name

Structural analysis of huge complexes decorated with sugarcluster surfaces

In situ SANS observation of the early stage on aggregation
process of α-synuclein

Inhomogeneity of phenolic resins during gelation process

Particle structure for aqueous acrylic polymer dispersion

Structural studies on catalyst for fuel cell electrodes

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

Title

大学院工学系研 Mixing state of imidazolium-based ionic liquids and benzene
derivatives
究科

工学研究科

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

所属

日本原子力研究 量子ビーム応用 Mesoscopic dynamics of staphylococcal nuclease in aqueous
solution investigated by neutron spin echo technique
開発機構
研究部門

佐賀大学

佐賀大学

東北大学

東京大学

柴山 充弘

116 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

東京大学

柴山 充弘

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

課題名

115 燃料電池電極用触媒インクの構造解析

114

No.

88

ISSP Activity Report 2013

中性子小角散乱法による多孔性放射線合成ゲルのナノ構造解析

131

川端 庸平

非イオン界面活性剤水溶液で形成されるベシク
136 ルの臨界ベシクル濃度近傍での構造とダイナミ
クス

柴山 充弘
高椋 利幸
吉田 亨次

Tetra-PEG イオンゲル・ハイドロゲルの動的挙
動の解析

140

141 イオン液体によるタンパク質３次構造の安定化

142 イオン液体と界面活性剤の混合物の相分離現象

144

生理活性を持つリン脂質二重膜のメゾスコピッ
ク物性研究
遠藤 仁

中性子スピンエコー法を基軸とした
143 Staphylococcal nuclease の水溶液中でのメゾス 遠藤 仁
コピックダイナミクス研究

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中野 実

139

138 POPC ナノディスクの構造とダイナミクス

リラクサー PMN-xPT におけるフラクタル揺らぎ
松浦 直人
の研究

川端 庸平

135 界面活性剤ゲルの膜面内ダイナミクス

137

柴山 充弘

古坂 道弘

大竹 淑恵

佐藤 信浩

氏名

134 iNSE（中性子スピンエコー分光器）IRT 課題

・申請装置 C2-3-1: iNSE

133 C1-3 小型集束型小角散乱装置 IRT 課題

・申請装置 C1-3: mf-SANS

132 ULS（極小角散乱装置）IRT 課題

・申請装置 C1-3: ULS

課題名

No.
SANS analysis on the nano structure of radiation-synthesizedporous polymer gels

Youhei Kawabata

Mitsuhiro Shibayama

Michihiro Furusaka

Yoshie Otake

Nobuhiro Sato

Name

理学部

Phase separation of ionic liquids and surfactant mixtures

大学院工学系研
Stabilization of tertiary structure of proteins by ionic liquids
究科

Segment dynamics analysis of Tetra-PEG ionic liquid gels andhydrogels

日本原子力研究 量子ビーム応用
Mesoscopic properties of bioactive lipid bilayer
開発機構
研究部門

日本原子力研究 量子ビーム応用 Mesoscopic dynamics of staphylococcal nuclease in aqueous
solution investigated by neutron spin echo technique
開発機構
研究部門

福岡大学

佐賀大学

物性研究所

The University of
Tokyo

KEK

University of Toyama

Tohoku University

Tokyo Metropolitan
University

Tokyo Metropolitan
University

The University ofTokyo

Hokkaido University

RIKEN

Kyoto University

Organization

Hitoshi Endo

Hitoshi Endo

Koji Yoshida

Japan Atomic Energy
AgencyJapan Atomic Energy
AgencyFukuoka University

Toshiyuki Takamuku Saga University

Mitsuhiro Shibayama

Koichiro Sadakane

物質構造科学研
Pressure-induced phase transition in a mixture of water/
高エネルギー加究所中性子研究
organic solvent/salt
速器研究機構系
東京大学

Minoru Nakano

Masato Matsuura

Static and dynamic structures of vesicles near the critical
Youhei Kawabata
vesicle concentration in a nonionic surfactant aqueous solution

Dynamics in gel-like surfactant membrane

IRT: iNSE (New issp Neutron Spin Echo Spectrometer)

金属材料研究所 Study of fractal dynamics in relaxor ferroelectric PMN-30%PT

理工学研究科

理工学研究科物性研究所

大学院工学研究 IRT: mf-SANS (mini-focusing Small Angle Neutron Scattering
Instrument)
科

仁科加速器セン
IRT: ULS (Ultra Small Angle Scattering Instrument)
ター

原子炉実験所

Title

富山大学大学院 医学薬学研究部 Structure and dynamics of POPC nanodiscs

東北大学

首都大学東京首都大学東京

東京大学

北海道大学

理化学研究所京都大学

所属

ISSP Activity Report 2013

89

課題名

AGNES（高分解能パルス冷中性子分光器）IRT
課題

東北大学

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

159

・申請装置 C3-1-2: MINE1

東京大学

多孔性配位高分子 MIL-53 におけるプロトン伝導
山室 修
ダイナミクス

158
林 慶

東京大学

東京電機大学

福岡大学

東京工業大学

九州大学

新潟大学

東京大学

東京大学

山室 修

両性イオン - グリシンの水溶液のダイナミクスと
山室 憲子
水和構造

156

157 逆浸透膜表面での水のダイナミクス

山口 敏男

メソポーラス有機シリカ中に閉じ込めた水とメ
タノールのダイナミクス

155

貞清 正彰

水酸化テトラアルキルアンモニウムを包接した配位高分子中での水酸化物イオンの運動

153
辰巳 創一

丸山 健二

メタノール水溶液における疎水性水和による水分子の拡散遅延効果

152

ナノ細孔中に封じ込められたシクロヘキサンの新奇な相転移に伴うダイナミクスの変化の解明

古府 麻衣子H2-SF6 ハイドレート中の水素の拡散ダイナミク
ス

151

154

古府 麻衣子

小林 洋治

ペロブスカイト型酸水素化物におけるヒドリド
ダイナミクス149

中性子準弾性散乱によるアルキルイミダゾリウ
150 ム系イオン液体におけるアルキル鎖運動の系統
的研究

大阪大学

金子 文俊

非晶性高分子の分子運動への超臨界二酸化炭素
の影響

148
京都大学

京都大学

慶應義塾大学東京大学

ポリ 4- メチルペンテン -1 のガス透過と局所ダイ
井上 倫太郎ナミクスの相関

千葉 文野

山室 修

氏名

147

146 GeTe 系の液液転移と個別原子拡散

145・申請装置 C3-1-1: AGNES

No.

IRT: AGNES (Angle Focusing Cold Neutron Spectrometer)

Title

Osamu Yamamuro

Name

Correlation between local dynamics and gas permeability ofpoly(4-methyl-1-pentene)

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

Diffusion of hydrogen molecules in H2-SF6 hydrate

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

Mobile hydride in perovskite oxyhydrides

Proton conducting dynamics in porous coordination polymer
MIL-53

Dynamics of water on surface of reverse osmosis membranes

Dynamics and hydration structures of aqueous solutions ofzwitterionic glycine

Dynamics of water and methanol molecules confined inmesoporous organic silica

大学院工学研究
Quasielastic neutron scattering of multiferroic CuFe1-xMxO2
科応用物理学専(M=Al,Mn)
攻

物性研究所

物性研究所

理工学部

理学部

理工学研究科化 Elucidation of the dynamical change involved in newly
discovered phase transition of nano-confined cyclohexane学専攻

カーボンニュー
Motion of hydroxide ions inside a metal-organic framework
トラル・エネル
including alkyl ammonium hydroxides
ギー国際研究所

理学部化学科

物性研究所

物性研究所

工学研究科

大学院理学研究
Influence of supercritical carbon dioxide on dynamical
科高分子科学専
properties of amorphous polymers
攻

化学研究所

Kei Hayashi

Osamu Yamamuro

Osamu Yamamuro

Noriko Yamamuro

Toshio Yamaguchi

Soichi Tatsumi

Masaaki Sadakiyo

Kenji Maruyama

Maiko Kofu

Maiko Kofu

Yoji Kobayashi

Fumitoshi Kaneko

Rintaro Inoue

理工学部物理学 Liquid-liquid transition and individual atomic diffusion in GeTe
Ayano Chiba
system
科

物性研究所

所属

Tohoku University

The University ofTokyo

The University of
Tokyo

Tokyo Denki
University

Fukuoka University

Tokyo Institute ofTechnology

Kyushu Univeristy

Niigata University

The University ofTokyo

The University ofTokyo

Faculty of Engineering,
Kyoto University

Osaka University

Kyoto University

Keio University

The University ofTokyo

Organization

90

ISSP Activity Report 2013

中性子スピン位相イメージングを用いた電流分
布の可視化 III

同志社大学

平山 朋子
平山 朋子
井上 倫太郎

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

中性子反射率法による疎水性表面上におけるア
ルカン分子の密度測定

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

170

171

172

九州大学

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

175

京都大学

北口 雅暁

174 超冷中性子光学系のためのデバイス開発

京都大学

井上 倫太郎

173 ディップコート薄膜の熱的物性挙動

京都大学

同志社大学

同志社大学

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

京都大学

169

日野 正裕

日野 正裕

MIEZE 分光法を用いた量子井戸滞在時間の実時
間測定

167

168 2 次元中性子集光デバイスの開発

京都大学

舟橋 春彦

経路を完全分離する Jamin 型冷中性子干渉計の
開発と応用

166
京都大学

京都大学

京都大学

京都大学

京都大学

MINE2（京大炉：多層膜中性子干渉計・反射率計）
日野 正裕
IRT 課題

田崎 誠司

田崎 誠司

日野 正裕

京都大学

京都大学

165

・申請装置 C3-1-2: MINE2

164 冷中性子による全断面積測定

163

162 2 次元中性子集光デバイスの開発

日野 正裕

MIEZE 分光法を用いた量子井戸滞在時間の実時
間測定

161

氏名

MINE1（京大炉：多層膜中性子干渉計・反射率計）
日野 正裕
IRT 課題

課題名

160

No.

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

Development of optical devices for ultra cold neutrons

Thermal properties of dip-coated polymer thin film

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

Hisao Matsuno

Masaaki Kitaguchi

Rintaro Inoue

Rintaro Inoue

Density of alkane molecules on hydrophobic surface measured
Tomoko Hirayama
by neutron reflectometry

Thickness and density of polymer brush layer on metal surface
Tomoko Hirayama
under lubrication measured by neutron reflectometry

Tomoko Hirayama

Masahiro Hino

Development of 2D focusing supermirror device
Structural analysis of interface of DLC/lubricant by means ofneutron reflectometry

Masahiro Hino

Haruhiko Funahashi

Masahiro Hino

Direct measurement of dwell time in quasi-bound state bymean of MIEZE spectroscopy

大学院工学研究
院 応用化学部 Study of adsorbed proteins at the polymer/water interfaces
門 ( 機能 )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 Jamin-type cold-neutron interferometer with completely
separated two paths
発推進機構

原子炉実験所

Seiji Tasaki

Kyushu University

Kyoto University

Kyoto University

Kyoto University

Doshisha University

Doshisha University

Doshisha University

Kyoto University

Kyoto University

Kyoto University

Kyoto University

Kyoto University

Kyoto University

工学研究科原子Measurement of total cross section for cold neutron
核工学専攻

Masahiro Hino

Development of 2D focusing supermirror device

Kyoto University

Kyoto University

Organization

Kyoto University

Masahiro Hino

Masahiro Hino

Name

Direct measurement of dwell time in quasi-bound state bymean of MIEZE spectroscopy

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

Title

工学研究科原子 Visualization of electric current distribution using neutron spin
Seiji Tasaki
phase imaging III
核工学専攻

原子炉実験所

原子炉実験所

原子炉実験所所属

ISSP Activity Report 2013

91

課題名

田崎 誠司
林田 洋寿
関 義親

波動関数の振幅を制御した多層膜中性子反射鏡の開発

多層膜スピンスプリッターによる高空間分解能
磁気イメージング法の開発

多層膜冷中性子干渉計による重力起因位相の精密測定（II）

178

179

180

山口大学

191

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

元屋 清一郎

元屋 清一郎時間分割中性子散乱測定による磁気構造変化過程の実時間追跡189

190 磁気構造の長時間変化と磁性原子希釈効果

満田 節生

スピン格子結合系 CuFeO2 のスピン波分散関係の一軸応力変化188

磁性イオン置換によりフラストレーションを制
187 御したスピン誘導型強 誘電体 CuFeO2 の交差相 満田 節生
関物性

益田 隆嗣

東京理科大学

東京理科大学

東京理科大学

東京理科大学

東京理科大学

東京大学

藤原 哲也

184 重い電子系新物質 Ce2Pt3Ge5 の磁気構造解析

山口大学

186 スピン・ネマティック相関の検出藤原 哲也

183 EuRu2P2 の磁気構造解析

山口大学

埼玉大学

藤原 哲也

182 EuCo2P2 の磁気構造解析

東京大学

理化学研究所

Title
Keiji Tanaka

Name

Detection of spin nematic correlation

理工学部

理工学部

理工学部

Disorder effects on the long-time variation of magnetic
structure in a multistep metamagnet Ca3Co2O6

Taketo Moyoshi

Tokyo University of
ScienceTokyo University of
Science

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

Tokyo University of
ScienceTokyo University of
Science

Setsuo Mitsuda

Tokyo University of
Science

The University ofTokyo

Saitama University

Yamaguchi University

Yamaguchi University

Yamaguchi University

The University of
Tokyo

RIKEN

Japan Atomic Energy
AgencyKyoto University

Kyoto University

Kyushu University

Organization

Real-time observation of magnetic structural change by means
Kiyoichiro Motoya
of time-resolved neutron scattering experiments

理学部物理学教 Spin wave dispersion relation in a spin-lattice coupled system
CuFeO2 under uniaxial stress室

Setsuo Mitsuda

Takatsugu Masuda

Susumu Katano

Tetsuya Fujiwara

Magnetic structure analysis of new heavy fermion material
Ce2Pt3Ge5
Magnetic structures of the non-centrosymmetrical 2D system
CeNiC2

Tetsuya Fujiwara

Tetsuya Fujiwara

Hideki Yoshizawa

Yoshichika Seki

Hirotoshi Hayashida

Seiji Tasaki

Magnetic structure analysis of EuRu2P2

Magnetic structure analysis of EuCo2P2

IRT: HQR (High Q Resolution Triple Axis Spectrometer)

理学部物理学教 Cross-correlation in spin-driven ME multiferroic CuFeO2 with
Mn-magnetic doping
室

物性研究所

理工学研究科

理工学研究科

理工学研究科

理工学研究科

物性研究所

仁科加速器研究 Precision measurement of gravitationally induced phase withmultilayer cold neutron interferometer II
センター

Development of new magnetic imaging technique with highspatial resolution using multilayer spin splitter

工学研究科原子 Improvement of multilayer neutron mirrors by controlling
amplitude of the internal wavefunction
核工学専攻

工学研究科原子 Visualization of electric current distribution using neutron spin
Seiji Tasaki
phase imaging III
核工学専攻

大学院工学研究 Aggregation State of Interface between Polymers and Mixed
院応用化学部門 Non-solvents所属

日本原子力研究 J-PARC セン
開発機構
ター

京都大学

京都大学

九州大学

空間反転対称性を欠く二次元的系 CeNiC2 の磁気185 構造
片野 進

吉沢 英樹

181 HQR（高分解能中性子散乱装置）IRT 課題

・申請装置 T1-1: HQR

田崎 誠司

中性子スピン位相イメージングを用いた電流分
布の可視化 III

田中 敬二

氏名

177

176 混合液体と接触した高分子界面の凝集状態

No.

92

ISSP Activity Report 2013

課題名

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

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

留野 泉

207 Pr0.5Sr0.5MnO3 の高温フォノン

208

留野 泉

総合科学研究機 東海事業セン構ター

電荷スピン両フラストレート系 1147 フェライト
蒲沢 和也の中性子散乱による電気磁気効果探査

204

206 混晶系 Ba1-xCaxTiO3 のフォノン

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

203

留野 泉

秋田大学

202 秩序型ペロブスカイト CaCu3Ti4O12 のフォノン 留野 泉

205 立方晶 BaTiO3 のフォノンの温度依存性

山口大学

繁岡 透

佐賀大学

秋田大学

秋田大学

秋田大学

Phonon in Pr0.5Mn0.5MnO3 at high temperature

Phonons in Ba1-xCaxTiO3

Temperature dependence of phonons in cubic BaTiO3

Neutron scattering study for both charge and spin frustrated
system of the 4th pyrochlore lattice of cubic 1147 ferrite
HoBaFe4O7

Xu-Guang Zheng

Izumi Tomeno

Izumi Tomeno

Izumi Tomeno

Kazuya Kamazawa

Xu-Guang Zheng

Izumi Tomeno

Toru Shigeoka

Successive components-separated magnetic transitions in
HoRh2Si2
Phonons in ordered perovskite CaCu3Ti4O12

Toru Shigeoka

Saga University

Akita University

Akita University

Akita University

CROSS-Tokai

Saga University

Akita University

Yamaguchi University

Yamaguchi University

Hirotake Shigematsu Yamaguchi University

Hirotake Shigematsu Yamaguchi University

Successive magnetic transitions in PrRh2Ge2

Polymorph transition and soft phonon in Rb2MoO4

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

大学院工学系研 Investigation of spin fluctuations in atacamite-type pyrochlore
compounds Mn2(OD)3Cl and Mn2(OD)3Br
究科

教育文化学部

教育文化学部

教育文化学部

大学院工学系研
究科

教育文化学部

理工学研究科

理工学研究科201 HoRh2Si2 の成分分離逐次磁気転移

山口大学

教育学部

教育学部

繁岡 透

山口大学

山口大学

Tohoku University

多元物質科学研
Magnetic structure of MnSb2O6 under external field
究所

Taku J Sato

Nagoya University

Tohoku University

Tokyo University of
ScienceTokyo University of
ScienceTokyo University of
ScienceOrganization

大学院理学研究 Study on the quantum criticality and correlation of magnetism
Noriaki Satoand superconductivity in CeTe3 and TbTe3
科

Yusuke Nambu

多元物質科学研
Pressure effects on the 2D triangular antiferromagnet
究所

Taro Nakajima

Taketo Moyoshi

Taro Nakajima

200 PrRh2Ge2 の逐次磁気転移

重松 宏武

東北大学

名古屋大学

Magnetic structure of a triangular system NaxNiO2

Name

理学部物理学教 Uniaxial pressure effect on a parent compound of Fe-based
superconductor FeTe
室

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

佐藤 卓

佐藤 憲昭

東北大学

物理

Title

理学部物理学教 Biaxial-pressure control of multiferroic domain structure in
spin-driven ME multiferroic CuFeO2
室

理工学部
学科

所属

199 Rb2MoO4 における多形転移とソフトフォノン

198

197 MnSb2O6 の磁場中磁気構造

196

南部 雄亮

東京理科大学

鉄系超伝導体母物質 FeTe のスピン・格子結合に
中島 多朗
対する一軸圧力効果

194

195 二次元三角格子反強磁性体の圧力効果

東京理科大学中島 多朗

東京理科大学

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

茂吉 武人

氏名

193

192 三角格子系 NaxNiO2 の磁気構造

No.

ISSP Activity Report 2013

93

東北大学
東北大学
東北大学
東北大学

新規 T' 構造ホールドープ銅酸化物 Pr2-xCaxCuO4
藤田 全基
における磁気相関の研究
藤田 全基

新規フラストレーションスピン梯子系 BiCu2PO6
藤田 全基における磁気相関の温度発展
平賀 晴弘
木村 宏之

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

遍歴電子反強磁性体 Mn3Si における動的スピン階層構造の研究マルチフェロイック物質 SmMn2O5 の磁気秩序
と強誘電性

211

212

213

214

215

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

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HERMES（東北大金研：中性子粉末回折装置）
IRT 課題223 希土類 遷移金属複合酸化物の磁気構造

222

・申請装置 T1-3: HERMES

221 鉄系超伝導体のスピン揺動

220

219 Mn2Sb のスピン揺らぎの研究

218

土井 貴弘

大山 研司

李 哲虎

光田 暁弘

小山 佳一

高阪 勇輔

北海道大学

東北大学

Masaki Fujita

Masaki Fujita

IRT: HERMES (Kinken Powder Diffractometer for High
Efficiency and High Resolution MeasurementS)

大学院理学研究
Magnetic structure of lanthanide transition metal oxides
院化学部門

金属材料研究所

Yoshihiro Doi

Kenji Ohoyama

Chul-Ho Lee

Study on metallic charge order in YbPd by neutron diffraction
Akihiro Mitsuda
in a magnetic fieldKeiichi Koyama

大学院理工学研
Experimental study of spin fluctuation on Mn2Sb
究科
理学研究院

Yusuke Kousaka

Yusuke Kousaka

理工学部物理数
Chiral magnetic structure in CrX (X=Si, Ge)
理学科
理工学部物理数 Crossover between conical and screw magnetic phase in(Mn,Mg)Cr2O4
理学科

Yusuke Kousaka

理工学部物理数
Chiral magnetism in MPO4 (M: transition metal)
理学科

Haruhiro Hiraka
Hiroyuki Kimura

Study on dynamical spin hierarchical structure in itinerantelectron antiferromagnet Mn3Si

Thermal evolution of magnetic correlations in novel frustrated
Masaki Fujita
spin-ladder system BiCu2PO6

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

Study of spin correlations in novel T'-structured cuprate oxide
Pr2-xCaxCuO4

多元物質科学研 Antiferromagnetism and ferroelectricity in multiferroic
compounds of SmMn2O5
究所

金属材料研究所

金属材料研究所

金属材料研究所

金属材料研究所

Masanori Enoki

大学院工学研究
Study of magnetic excitation dispassion in Bi2201 by
院物質工学研究measurement of high-energy excitation
系

Name

Haruhiro Hiraka

Title

金属材料研究所 IRT: AKANE (Advanced Kinken Neutron Spectrometer)所属

産業技術総合研 エネルギー技術
Spin fluctuations of iron-based superconductors
究所
研究部門

九州大学

鹿児島大学

青山学院大学青山学院大学217 CrX (Cr=Si, Ge) のカイラル磁気構造の検証

高阪 勇輔

青山学院大学216 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

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

東北大学

210

平賀 晴弘

氏名

AKANE（東北大金研：三軸型中性子分光器 ）IRT 課題課題名

209

・申請装置 T1-2: AKANE

No.

Hokkaido University

Tohoku University

National Institute ofAdvanced Industrial
Science and Technology

Kyushu Univerisity

Kagoshima University

Aoyama-Gakuin
University

Aoyama-Gakuin
University

Aoyama-Gakuin
University

Tohoku University

Tohoku University

Tohoku University

Tohoku University

Tohoku University

Kyushu Institute ofTechnology

Tohoku University

Organization

94

ISSP Activity Report 2013

異常高原子価鉄を持つ (Ba,Sr)FeO3 の磁気構造と相境界の解明

225

岩手大学
東北大学
東北大学

東京工業大学
東京工業大学松川 倫明

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
南部 雄亮
単 躍進
田畑 吉計
田畑 吉計

電子ドープ型マンガン酸化物の磁化の反転と磁気構造

新しい S=3/2 三角格子反強磁性体の結晶構造と磁気構造

リチウムイオンを含む新規複合酸化物の結晶構
造解析

新しいタイプの遍歴電子フラストレート磁性体
Fe6W6C, Co6W6C における磁気相関

機械的特性に優れた新規磁性化合物 M2AX の磁気構造解析

スピン 2 の籠目格子反強磁性体 Cs2Mn3LiF12 の
田中 秀数
基底状態

ナノ細孔中に封じ込められたシクロヘキサンの新奇な相転移に伴う構造変化の解明

232

233

234

235

236

237

238

239

240 クロム複硫化物の結晶構造と磁気転移

青山学院大学

新規カイラル磁性体 CrX (X=Si, Ge) の磁気構造
高阪 勇輔
解析

231

手塚 慶太郎

宇都宮大学

京都大学

京都大学

宇都宮大学

青山学院大学高阪 勇輔

Structural determination of (CuCl)LaNb2O7-xFx

Yoji Kobayashi

Magnetization reversal and magnetic structure in electron
doped manganites

Crystal structure analysis of a novel multiple oxide withlithium and tellurium

Aoyama-Gakuin
University

Aoyama-Gakuin
University

Faculty of Engineering,
Kyoto University

Kyoto University

Kyoto University

Kyoto University

Kyoto University

Tokyo Institute ofTechnology

Organization

Yue Jin Shan

Yusuke Nambu

Yusuke Nambu

Soichi Tatsumi
Keitaro Tezuka

工学研究科物質 Crystal structures and magnetic transitions of chromium
complex Sulfides
環境化学専攻Hidekazu Tanaka

大学院理工学研
Ground state of spin-2 kagome lattice antiferromagnet
究科物性物理学
Cs2MnLiF12
専攻
理工学研究科化 Elucidation of the structural change involved in newly
discovered phase transition of nano-confined cyclohexane
学専攻

Yoshikazu Tabata

大学院工学研究 Magnetic structure of novel magnetic compounds with
科材料工学専攻 outstanding mechanical properties M2AX

Utsunomiya University

Tokyo Institute ofTechnology

Tokyo Institute ofTechnology

Kyoto University

Kyoto University

Utsunomiya University

Tohoku University

Tohoku University

Michiaki Matsukawa Iwate University

大学院工学研究 Spin correlatons in novel itinerant-electron frustrated magnets
Yoshikazu Tabata
科材料工学専攻 Fe6W6C and Co6W6C

工学研究科

多元物質科学研 Crystal and magnetic structures of a new S=3/2 triangularantiferromagnet
究所

多元物質科学研 Crystal and magnetic structures of the bilayer triangularantiferromagnet Fe2Ga2S5
究所

工学部

理工学部物理数 Magnetic structure analysis in new chiral magnetic compounds
Yusuke Kousaka
CrX (X=Si, Ge)
理学科

理工学部物理数 Magnetic structure analysis in new chiral magnetic compounds
Yusuke Kousaka
MPO4 (M: transition metal)
理学科

工学研究科

Hiroshi Kageyama

Structural investigation of neodymium-doped cobaltate
京都大学工学研 物質エネルギー
perovskites
究科
化学専攻

京都大学

Hiroshi Kageyama

京都大学工学研 物質エネルギー
Hydride-incorporation into perovskite-type oxynitride
究科
化学専攻

Hiroshi Kageyama

京都大学工学研 物質エネルギー Low temperature structural analysis in BaTi2Sb2O with a d1
square lattice
究科
化学専攻

Kotaro Fujii

Name

Hiroshi Kageyama

新規カイラル磁性体 MPO4 (M: 遷移金属 ) の磁
気構造解析

辰巳 創一

Title

大学院理工学研 Structural investigation of the novel AA'BO4-type materials
mixed oxide-ionic and electronic conducting materials
究科所属

京都大学工学研 物質エネルギー Investigation for magnetic structure and phase boundary of(Ba,Sr)FeO3 with an unusually high valence strate of iron究科
化学専攻

東京工業大学

230

小林 洋治

陰山 洋

ニオブドープ・ペロブスカイトコバルト酸化物の構造の解明228229 (CuCl)LaNb2O7-xFx の構造決定

陰山 洋

ペロブスカイト型酸窒化物に対する水素化物イ
オン挿入

陰山 洋

227

226 正方格子 d1 超伝導体 BaTi2Sb2O の低温構造

藤井 孝太郎新規 AA'BO4 型構造をもつ混合イオン伝導体の結晶構造とイオン伝導経路の解明

224
陰山 洋

氏名

課題名

No.

ISSP Activity Report 201395

水素貯蔵材料アルミニウム錯体水素化物における水素放出過程の回折と非弾性散乱による研究

241

八島 正知

格子間酸素を利用したイオン伝導性セラミック
スの結晶構造とイオン拡散経路

244

八島 正知

250 可視光応答型酸窒化物光触媒の構造物性

満田 節生

256

磁性イオン置換したスピンフラストレーション
系物質 CuFeO2 の磁気構造

小林 悟

塑性歪みを加えた Pt3Fe 反強磁性体における強磁性の発現機構

254
光田 暁弘

木村 宏之

マルチフェロイック物質 SmMn2O5 の磁気秩序
と強誘電性

253

255 金属的電荷秩序を示す YbPd の低温構造の解明

岩佐 和晃

DyFe2Zn20 における異方性変化を伴う逐次磁気
相転移

252

251 FONDER（中性子 4 軸回折装置）IRT 課題

・申請装置 C2-2: FONDER
野田 幸男

飯久保 智

249 高い保磁力を有する FeCo ナノ粒子の結晶構造

248

野村 勝裕

李 哲虎

白金含有ペロブスカイト型酸化物の中性子回折測定

247 鉄系超伝導体の結晶構造と超伝導の相関

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

八島 正知

層状ペロブスカイト型酸化物の結晶構造とイオ
ン拡散経路

山室 修

富安 啓輔

氏名

243

242 イミダゾリウム系イオン液体の短・中距離構造

課題名

No.

東京理科大学

九州大学

岩手大学

東北大学

Satoshi Iikubo

Katsuhiro Nomura

Chul-Ho Lee

Study on low-temperature structure of YbPd performing
metallic charge order

理学部物理学教 Magnetic structures in spin frustration system CuFeO2 withmagnetic doping
室

理学研究院

工学部マテリア Mechanism of ferromagnetism in plastically deformed Pt3Fe
antiferromagnet
ル工学科

多元物質科学研 Antiferromagnetism and ferroelectricity in multiferroic
compounds of SmMn2O5
究所

Successive magnetic phase transition accompanying drastic
variation in magnetic anisotropy of DyFe2Zn20

多元物質科学研 IRT: FONDER (Four-circle-Off-center-type Neutron
Diffractometer)
究所

Setsuo Mitsuda

Akihiro Mitsuda

Satoru Kobayashi

Hiroyuki Kimura

Kazuaki Iwasa

Yukio Noda

大学院理工学研 Structure-property correlation of visible-light responsive metalMasatomo Yashima
oxynitride photocatalysis
究科

大学院生命体工 Crystal structure of a FeCo nano-particle with high coercive
force
学研究科

東北大学大学院 理学研究科

東北大学

東京工業大学

九州工業大学

産業技術総合研 ユビキタスエネ Neutron diffraction study of platinum containing perovskite
究所
ルギー研究部門 oxides

産業技術総合研 エネルギー技術 Relationship between crystal structure and superconductivity
in Fe-based superconductors
究所
研究部門

Tokyo University of
Science

Kyushu Univerisity

Iwate University

Tohoku University

Tohoku University

Tohoku University

Tokyo Institute ofTechnology

Kyushu Institute ofTechnology

National Institute ofAdvanced Industrial
Science and Technology

National Institute ofAdvanced Industrial
Science and Technology

Saga University

Xu-Guang Zheng

大学院工学系研 Study of geometric frustration in triangular-lattice
M2(OD)3X[M:Cu,Ni,Cu etc; X:Cl,Br,I]
究科

佐賀大学

Tokyo Institute ofTechnology
Saga University

Masatomo Yashima

Tokyo Institute ofTechnology

大学院工学系研 Study of geometric frustration in a new triangular lattice series
Xu-Guang Zheng
compounds MODX
究科

大学院理工学研 Crystal structure and diffusion pathway of oxide ions in ionic
conducting ceramics via interstitial oxide ions
究科

Masatomo Yashima

The University ofTokyo

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

大学院理工学研 Crystal structure and ion conduction pathway of layered
perovskite-type oxides
究科

物性研究所

Organization
Tohoku University

Name
Keisuke Tomiyasu

Diffraction and inelastic scattering studies of decomposition
高等教育開発推
process in hydrogen storage material, hydride with aluminum
進センター
complex

Title

佐賀大学

東京工業大学

東京工業大学

東京大学

東北大学

所属

96

ISSP Activity Report 2013

ビスマス系強誘電体単結晶における巨大圧電性
の起源解明

257

262 アクセサリー IRT 課題

・申請装置 Accessory
上床 美也

金子 耕士

261 β- パイロクロア化合物における精密構造解析

山崎 照夫
金子 耕士

スピン三重項超伝導体 Sr2RuO4 の一軸圧力下中性子散乱実験

重松 宏武

野口 祐二

氏名

260 I 型クラスレートにおける非調和振動

259

258 KH2AsO4 の低温構造と相転移

課題名

No.

Low temperature structure and the phase transition of
KH2AsO4

物性研究所
IRT: Accessory

Yoshiya Uwatoko

Koji Kaneko

Teruo Yamazaki

日本原子力研究 量子ビーム応用
Detailed structural analysis on beta-pyrochlore compounds
開発機構
研究部門

東京大学

The University ofTokyo

Organization

The University of
Tokyo

Japan Atomic Energy
AgencyJapan Atomic Energy
AgencyTokyo University of
Science

Hirotake Shigematsu Yamaguchi University

Yuji Noguchi

Name

Koji Kaneko

理工学部物理学 Neutron scattering of the triplet superconductor Sr2RuO4
under uniaxial pressures
科

教育学部

先端科学技術研 Mechanism of a giant piezoelectric response for Bi-based
ferroelectric single crystals
究センター

Title

日本原子力研究 量子ビーム応用
Anharmonicity in type-I clathrates
開発機構
研究部門

東京理科大学

山口大学

東京大学

所属

ISSP Activity Report 2013

97

鹿又 武
礒田 誠
古坂 道弘
金子 純一

3d 遷移金属化合物の圧力下における磁気特性

重い電子系物質における圧力下電気抵抗測定

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

中性子極小角散乱実験装置のアップグレード

12

13

14

15

名嘉 節

磁化測定装置の開発

片野 進

中性子回析に用いる圧力装置の開発

8

11

辺土 正人

低温用マルチアンビル装置の開発

7

梅原 出

藤原 直樹

圧力下 NMR 測定法に関する開発

6高圧下の比熱測定装置の開発

巨海 玄道

磁性体の圧力効果

5

10

藤原 哲也

希土類化合物の単結晶試料評価とその圧力効果

4

糸井 充穂

高橋 博樹

多重極限関連装置の調整

3

擬一次元有機物質の圧力下物性研究

村田 惠三

有機伝導体の圧力効果

2

9

河江 達也

AgPdCu 合金圧力セルを用いた磁場中比熱測定

1

氏名

課題名

No.

嘱託研究員（Comission Researcher）

北海道大学

北海道大学

香川大学

東北学院大学

物質・材料研究機構

横浜国立大学

日本大学

埼玉大学

琉球大学

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

Adjustment of cubic anvil apparatus

Development of multi-anvil apparatus for low temperature

Takeshi Kanomata

Investigation of magnetic properties for 3d transitionintermetallic compounds under pressure

Michihiro Furusaka
Junichi Kaneko

大学院工学研究
Upgrade of ULS system院

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

Takashi Naka

Izuru Umehara

Development of apparatus for specific heat measurements
under high pressure
Development of the magnetometer

Miho Itoi

Study on pressure induced superconductivity of quasi organic
conductor

Susumu Katano

Masato Hedo

Naoki Fujiwara

Gendo Oomi

Tetsuya Fujiwara

Hiroki Takahashi

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

教育学部

工学総合研究所

工学部

医学部

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

理学部

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

Effect of pressure on the magnetic materials

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

文理学部

Keizo Murata

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

Name
Tatsuya Kawae

Title

Name

大学院工学研究 Development of pressure cell for specific heat measurements
under magnetic field
院

所属

Title

共同利用課題一覧（後期） Joint Research List (2013 Latter Term)所属

平成 25 年度

氏名

課題名

No.

Hokkaido University

Hokkaido University

Kagawa University

Tohoku Gakuin
University

National Institute forMaterials Science

Yokohama National
University

Nihon University

Saitama University

University of the
Ryukyus

Kyoto University

Kurume Institute ofTechnology

Yamaguchi University

Nihon University

Osaka City University

Kyushu University

Organization

Organization

98

ISSP Activity Report 2013
木村 宏之
藤田 全基
大山 研司
平賀 晴弘
田畑 吉計
松村 武
松浦 直人
桑原 慶太郎
横山 淳
田崎 誠司
中野 実
杉山 正明
日野 正裕
北口 雅暁
藤原 哲也
高橋 良彰

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と共同利用研
究の推進

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

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
インの整備

膜貫通ペプチドのフリップフロップ誘起能の評
価

C1-3 ULS 極小角散乱装置 IRT

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

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

中性子散乱用高圧セルの開発および高圧下における中性子散乱実験

流動場でのソフトマターの構造変化に関する研
究

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

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

16

氏名

課題名

No.

九州大学

山口大学

名古屋大学

京都大学

京都大学

富山大学

京都大学

茨城大学

茨城大学

総合科学研究機
構

広島大学

京都大学

Kazuaki Iwasa

Name

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

金属材料研究所 P ropelling the inter university research cooperation

金属材料研究所

Keitaro Kuwahara

Masato Matsuura

Takeshi Matsumura

Yoshikazu Tanabe

Improvement of MIEZE spectrometer and cold neutronreflectometer and interferometer

Development of micro-focusing small-angle neutron scattering
spectrometer

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

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

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

原子炉実験所

原子炉実験所

Yoshiaki Takahashi

Tetsuya Fujiwara

Masaaki Kitaguchi

Masahiro Hino

Masaaki Sugiyama

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

Seiji Tasaki

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

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

理学部

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

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

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

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

Haruhiro Hiraka

Keji Ohoyama

Masaki Fujita

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

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

Title

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

東北大学

東北大学

東北大学

東北大学

所属

Kyushu University

Yamaguchi University

Nagoya University

Kyoto University

Kyoto University

University of Toyama

Kyoto University

Ibaraki University

Ibaraki University

CROSS

Hiroshima University

Kyoto University

KEK

Tohoku University

Tohoku University

Tohoku University

Tohoku University

Organization

ISSP Activity Report 2013

99

金井 要
藤森 伸一
津田 俊輔
松波 雅治

有機化合物の光電子分光

重い電子系ウラン化合物の高分解能光電子分光

レーザー光電子分光による酸化物薄膜の研究

4f 電子系物質の高分解能光電子分光

46

47

48

49

下志万 貴博鉄系超伝導体のレーザー光電子分光

42

江口 律子

石坂 香子

60-eV レーザーを用いた時間分解光電子分光の開発

41

酸化バナジウムの高分解能光電子分光

藤森 淳

高温超伝導体の高分解能光電子分光

40

45

鳴海 康雄

強磁場量子ビーム科学のためのパルスマグネッ
トの開発

39

横谷 尚睦

南部 雄亮

高度化した三軸分光器を用いた強相関電子系物
質の研究

38

高分解能光電子分光による強相関物質の研究

佐藤 卓

高度化した三軸分光器を用いた共同利用の推進とスピンダイナミクスの研究

37

44

大竹 淑恵

冷中性子干渉イメージング装置開発研究

36

竹内 恒博

伊藤 晋一

中性子散乱研究計画の実施と共同利用の推進

35

Bi 系超伝導体の角度分解光電子分光

川端 庸平

非イオン界面活性剤水溶液における臨界ベシク
ル濃度近傍での 2 分子膜の熱揺らぎ

34

43

阿曽 尚文

三軸分光器を用いた極端条件下における物質科
学研究の実施

33

氏名

課題名

No.
Material science studies under extreme conditions by using
triple-axis spectrometers

Yoshie Otake

Shinichi Itoh

Youhei Kawabata

Naofumi Aso

Name

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

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

Masaharu
Matsunami

Shunsuke Tsuda

物質・材料研究機構

Laser-photoemission study on oxide films

Shinichi Fujimori

Kaname Kanai

Ritsuko Eguchi

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

Takayoshi Yokoya

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

理工学部

Tsunehiro Takeuchi

Takahiro Shimojima

大学院工学系研
Laser-ARPES on Fe superconductor
究科
エコトピア科学
Angle-resolved photoemission study on high Tc cuprate
研究所

Kyoko Ishizaka

Atsushi Fujimori

Yasuo Narumi

Yusuke Nambu

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

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

金属材料研究所

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

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

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

Propelling the inter university research cooperation

大学院理工学研 Thermal fluctuation of bilayers near the critical vesicle
concentration in a nonionic surfactant aqueous solution
究科

理学部

Title

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

東京理科大学

岡山大学

岡山大学

名古屋大学

東京大学

東京大学

東京大学

東北大学

東北大学

東北大学

理化学研究所高エネルギー加速器研究機構首都大学東京琉球大学

所属

National Institutes of
Natural Sciences

National Institute forMaterials Science

Japan Atomic Energy
AgencyTokyo University of
ScienceOkayama University

Okayama University

Nagoya University

The University ofTokyo

The University ofTokyo

The University ofTokyo

Tohoku University

Tohoku University

Tohoku University

RIKEN

High Energy
Accelerator ResearchInstituteTokyo Metropolitan
University

University of the
Ryukyus

Organization

100

ISSP Activity Report 2013
大川 万里生
和達 大樹
岡崎 浩三
小嗣 真人
室 隆桂之
田島 裕之
近藤 寛
雨宮 健太
奥田 太一
木下 豊彦
小野 寛太
後藤 俊治
大橋 治彦
組頭 広志
小澤 健一
木村 昭夫

光電子分光、共鳴軟 X 線回析

極低温・超高分解能光電子分光を用いた超伝導機構の研究

収差補正型光電子顕微鏡の建設と利用研究

時間分解・マイクロビームラインの開発と研究

ナノクラスター物質の発光測定

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

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光電子スピン検出器の開発・研究

光電子顕微鏡による磁性ナノ構造物質の磁化過程

高輝度極紫外ビームラインの設計・評価

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

〃

高輝度軟 X 線を利用した強相関物質の電子状態研究

時間分解光電子分光法による光触媒材料のキャ
リアダイナミクス研究

軟 X 線時間分解分光実験による磁性研究

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

中川 剛志

Mn 化合物の時間分解光電子分光

超高空間分解能光電子顕微鏡による磁区構造観
察

50

氏名

51

課題名

No.

Time resolved photoemission on Mn compounds

理工学部Study of surface dynamics by time-resolved photoemission
spectroscopy with high-brilliant soft X-ray synchrotron
radiation〃

Design of the new undulator beamline at SPring-8

広島大学

東京工業大学Japan Synchrotron
Radiation InstituteJapan Synchrotron
Radiation InstituteHigh Energy
Accelerator ResearchInstituteJapan Synchrotron
Radiation Institute

Hiroshima University

High Energy
Accelerator ResearchInstitute

Keio University

The Univerisity of
Hyogo

Japan Synchrotron
Radiation InstituteJapan Synchrotron
Radiation Institute

The University ofTokyo

The University of
Tokyo

Tokyo University of
Science

Kyushu University

Organization

Kenichi Ozawa
Akio Kimura

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

Hiroshima University

Tokyo Institute ofTechnology

High Energy
Hiroshi Kumigashira Accelerator ResearchInstituteHaruhiko Ohashi

Shunji Goto

Kanta Ono

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

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

高輝度光科学研
放射光研究所
究センター

高輝度光科学研
放射光研究所
究センター

Taichi Okuda

Kenta Amemiya

Hiroshi Kondoh

Hiroyuki Tajima

Takayuki Muro

Masato Kotsugi

Kozo Okazaki

Hiroki Wadati

Mario Okawa

Takeshi Nakagawa

Name

Magnetization in process of magnetic nano structure by PEEM Toyohiko Kinoshita

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

高エネルギー加 物質構造科学研
Design and characterization of brilliance VUV beamline.
速器研究機構究所

高輝度光科学研
究センター

広島大学

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

慶應義塾大学

大学院物質理学
Luminescence studies on nanoclusters
研究科

Development of micr- and time-resolved beamline

高輝度光科学研究センター
兵庫県立大学

Construction and utilization research of aberration correction
photoelectron emission microscopy

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

大学院工学系研 Spades photoemission spectroscopy-resonant soft x-ray
scattering
究科

理学部

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

Title

高輝度光科学研
究センター

東京大学

東京大学

東京理科大学

九州大学

所属

ISSP Activity Report 2013

101

林 好一
細野 英司
関場 大一郎
関山 明
藤原 秀紀
菅 滋正

時間分解光電子回析実験の要素技術開発

軟 X 線吸収／発光分光法によるリチウムイオン
電池電極材料の電子物性研究

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

時間分解光電子分光による重い電子系の研究

高分解能光電子分光による酸化バナジウムの研
究

軟 X 線発光・共鳴非弾性散乱分光の磁気円・線二色性測定システムの構築

69

70

71

72

73

74

増村 昌三
吉澤 正人
藤井 千旭

〃

トポロジカル物質のパルス磁場中の超音波測定

〃

6

7

カゴ状構造を有する異方的超伝導体 Y5Ir6Sn18 の
加瀬 直樹
超伝導ギャップ構造の決定

國方 翔太

5

4

〃

出口 和彦

5f 及び 3d 電子系強磁性超伝導体の研究

2

3

萩原 政幸

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

課題名

1

No.

氏名

大門 寛

二次元表示型スピン分解光電子エネルギー分析
器の開発

68

一般研究員（General Researcher）

坂本 一之

高輝度軟 X 線を利用する光電子顕微鏡装置の設
計・開発

67

氏名

課題名

No.
大学院融合科学 Research and designing of a PEEM spectrometer for highbrilliance soft X ray
研究科

Title

金属材料研究所

Technical development of time-resolved photoelectron
diffraction experiment
Koichi Hayashi

Hiroshi Daimon

Kazuyuki Sakamoto

Name

岩手大学

岩手大学

新潟大学

新潟大学

名古屋大学

名古屋大学

大阪大学

大阪大学

大阪大学

大阪大学

筑波大学

Shouta Kunikata

大学院理学研究
科

Shozo Masumura

大学院自然科学研究科

Chiaki Fujii

大学院工学研究科〃

Masahito Yoshizawa

大学院工学研究 Ultrasonic measurements of topological materials in pulsed
magnetic field科〃

Naoki Kase

大学院自然科学 Superconducting gap structures of Y5Ir6Sn18 determined byangle-resolved specific heat measurements
研究科〃

Kazuhiko Deguchi

大学院理学研究
Study of 5f and 3d ferromagnetic superconductors
科

Name

Shigemasa Suga

Masayuki Hagiwara

Title

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

Hidenori Fujiwara

極限量子科学研 Magnetization measurements on an S=2 one-dimensional
Heisenberg antiferromagnet at ultra-low temperatures
究センター

所属

産業科学研究所

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

Akira Sekiyama

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

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

数理物質系

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

東北大学

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

千葉大学

所属

Iwate University

Iwate University

Niigata University

Niigata University

Nagoya University

Nagoya University

Osaka University

Organization

Osaka University

Osaka University

Osaka University

University of Tsukuba

National Institute ofAdvanced Industrial
Science and Technology

Tohoku University

Nara Instituteof Science andTechnology

Chiba University

Organization

102

ISSP Activity Report 2013〃

鉄錯体からなる分子性導電体の磁気・光物性研
究〃

熱耐久性を有する高性能塗布型有機トランジス
タ材料の開発

〃

20

21

22

23

24

三津井 親彦

岡本 敏宏

西 美樹

松田 真生

小崎 祐太郎

松田 真生

コバルト錯体からなる分子性導電体の磁気・光
物性研究

19

東京大学

東京大学

熊本大学

熊本大学

熊本大学

熊本大学

茨城大学

桑原 慶太郎磁性体の中性子散乱による研究

18

大阪府立大学

大阪府立大学

奥 雄太

〃

15

大阪府立大学

小野 俊雄

岩瀬 賢治

〃

14

大阪府立大学

六方晶 ordered perovskite 三角格子反強磁性体
Ba3MTa2O9 (M=Co, Ni) の低温磁性

山口 博則

有機ラジカルを用いた新規磁性体の低温磁気測
定

13

広島大学

17

島田 祐樹

〃

12

広島大学

明治大学

松本 圭介

〃

11

広島大学

量子スピンアイス系 Yb2Ti2O7 の特異な磁気相転
安井 幸夫
移

鬼丸 孝博

非磁性基底二重項を持つ PrIr2Zn20 における La
希釈効果

10

首都大学東京首都大学東京

16

清原 達也

高津 浩

氏名

〃

パイロクロア磁性体 Tb2-xTi2+xO7 の比熱測定

課題名

9

8

No.

Title

〃

大学院先端物質
科学研究科〃

大学院理学系研
究科

Yutaro Kozaki

Miki Nishi

大学院自然科学
研究科

The University ofTokyo
Chikahiko Mitsui

大学院新領域創成科学研究科〃The University ofTokyo

Kumamoto University

Kumamoto University

Kumamoto University

Kumamoto University

Ibaraki University

Osaka Prefecture
University

Meiji University

Osaka Prefecture
University

Osaka Prefecture
University

Osaka Prefecture
University

Hiroshima University

Hiroshima University

Hiroshima University

Tokyo Metropolitan
University

Tokyo Metropolitan
University

Organization

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

Masaki Matsuda

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

大学院自然科学研究科

Keitaro Kuwahara

大学院理工学研
Neutron scattering study of magnetic materials
究科

Masaki Matsuda

Toshio Ono

Low temperature magnetic properties of hexagonal ordered
大学院理学系研
perovskite triangular antiferromagnetic system Ba3MTa2O9
究科(M=Co, Ni)

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

Yukio Yasui

Anomalous magnetic transition of quantum spin ice system
Yb2Ti2O7

理工学部

Kenji Iwase〃

大学院理学系研
究科

Yuta Oku

Hironori Yamaguchi

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

Yuki Shimada

Keisuke Matsumoto〃

大学院先端物質科学研究科

Tatsuya Kiyohara
Takahiro Onimaru〃

Hiroshi Takatsu

Name

大学院先端物質 La substitution effect on the magnetic properties of PrIr2Zn20
with the nonmagnetic doublet ground state
科学研究科

大学院理工学研
究科

大学院理工学研 Specific heat measurements of the pyrochlore magnet
Tb2-xTi2+xO7
究科所属

ISSP Activity Report 2013

103

呉 勇傑

〃

神戸 士郎

Pb 置換 BI 系超伝導体のホール係数測定

39

41

平山 尚美

Mg2Si 単結晶および焼結体のホール測定

38

菅野 駿

長谷川 靖洋Bi ナノワイヤーにおける量子振動実験

37

〃

坪内 賢太

機能性酸化物薄膜の作製と評価

36

40

伊高 健治

松本 祐司

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

34

太陽電池用シリコンプロセスにおける副生成物
の分析

北村 未歩

ダブルペロブスカイト酸化物薄膜における秩序構造制御とその輸送・誘電特性評価

33

35

宮原 慎

特異な分散を示す強相関電子系における量子相
転移

32

山形大学

山形大学

山形大学

東京理科大学

埼玉大学

東京大学

弘前大学

東北大学

東京大学

福岡大学

福岡工業大学丸山 勲

1/5 欠損正方格子上のハバード模型におけるチャーン数の計算

31

大阪府立大学日本大学

宮外 浩嗣

1/5 欠損正方格子ハバードモデルにおけるエッジ
山下 靖文
状態とベリー位相〃大阪府立大学

愛媛大学

東京大学

東京大学

30

29

山口 博則

中村 健一

〃

27

新規梯子格子磁性体 3-Br-4-F-V の NMR 測定

吉本 和美

〃

26

28

山岸 正和

熱耐久性を有する高性能塗布型有機トランジス
タ材料の開発

25

氏名

課題名

No.

Title

Name

Organization

Quantum phase transition in strongly correlated electron
systems with anomalous dispersion relations

Calculation of the Chern Number in the 1/5-depleted squarelattice Hubbard model.

Edge state and Berry phase of the 1/5-depleted square-lattice
Hubbard model at 1/4-filling

Shun Kanno〃〃

大学院理工学研
究科
大学院理工学研
究科

Yongjie Wu

Shiro Kambe

Naomi Hirayama

Hall measurement of single-crystalline and sinteredpolycrystalline magnesium silicide Mg2Si

大学院理工学研 Hall coefficient measurement of Pb-substituted Bi-based
superconductors
究科

基礎工学部

Yasuhiro Hasegawa

Experiment of quantum oscillation by Bi nanowire

Kenta Tsubouchi

大学院新領域創
Fablication and characterization of functional oxide thin film
成科学研究科
工学部

Kenji Itaka

Yuji Matsumoto

Miho Kitamura

Shin Miyahara

Isao Maruyama

Yasufumi Yamashita

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

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

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

理学部

情報工学部

工学部

Hirotsugu Miyagai〃

大学院理学系研
究科

Ken-ichi Nakamura

Kazumi Yoshimoto

Hironori Yamaguchi〃〃

大学院理学系研
NMR study of new spin-ladder material 3-Br-4-F-V
究科

工学部

大学院新領域創成科学研究科Yamagata University

Yamagata University

Yamagata University

Tokyo University of
Science

Saitama University

The University ofTokyo

Hirosaki University

Tohoku University

The University ofTokyo

Fukuoka University

Fukuoka Institute ofTechnology

Nihon University

Osaka Prefecture
University

Osaka Prefecture
University

Ehime University

The University ofTokyo

The University of
大学院新領域創 Development of solution-processable high performance organic
Masakazu Yamagishi
semiconductors with thermal durability
Tokyo
成科学研究科所属

104

ISSP Activity Report 2013
河村 紀一
金沢 育三

金属／半導体表面上ナノ構造の形成とその非線形発光の時間分解測定

新しい金属ドープ・ボロン・クラスター系物質と陽電子ビーム法による分析〃

半導体基板上に成長したグラフェンナノリボン
およびシリセンの電子物性

重い電子系超伝導の実空間観察のための超低温・
河江 達也
強磁場の小型 STM の開発

44

45

46

47

48

〃

Making of new metal-doped boron-cluster materials andanalysis by slow-positron beam

58

57

56

55

EuRu2P2 の高圧力下磁化測定 (2)〃EuFe2P2 の高圧力下磁化測定〃(Ho,Y)Rh2Si2 単結晶の磁気転移 2

藤原 哲也

田端 克好

藤原 哲也

藤井 洋

繁岡 透

山口大学

山口大学

山口大学

山口大学

山口大学

〃

北陸先端科学技 マテリアルサイ術大学院大学
エンス研究科

青柳 航平

〃

53

54

〃

北陸先端科学技 マテリアルサイ術大学院大学
エンス研究科アントワーヌ
フロランス

〃

52

Yoh Fujii

大学院理工学研
究科

大学院理工学研 Magnetization measurements under high pressures in EuRu2P2
Tetsuya Fujiwara(II)
究科

Yamaguchi University

Yamaguchi University

Katsuyoshi Tabata

大学院理工学研
究科〃

Yamaguchi University

Yamaguchi University

Yamaguchi University

Japan Advanced
Institute of Scienceand Technology

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

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

Kohei Aoyagi

Rainer FRIEDLEIN

Japan Advanced
Institute of Scienceand Technology

Kyushu University

Kyushu University

Tokyo Institute ofTechnology

Tokyo Gakugei
University

Tokyo Gakugei
University

Japan Advanced
Institute of Scienceand Technology
Japan Advanced
Antoine FLEURENCE Institute of Scienceand Technology

北陸先端科学技 マテリアルサイ術大学院大学
エンス研究科ライナー フリードライン〃51〃

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

高村 由起子Hiroki Takata

Tatsuya Kawae

Kan Nakatsuji

Erika Imai

Ikuzo Kanazawa

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

大学院工学研究 Development of a miniature STM for low-temperature andhigh-field measurements of heavy fermion superconductors
院
大学院工学府National Institutes of
Natural Sciences

Yamagata University

Organization

NHK Science &Time resolved spectroscopy of harmonics from nano-structures
Norikazu Kawamura Technical Researchon metal/semiconductor surfaces
Laboratories

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

大学院教育学研
究科

自然科学系

放送技術研究所

50

九州大学

九州大学

東京工業大学

東京学芸大学

東京学芸大学

日本放送協会Tetsuya Narushima

Luo Tianwen

Name

〃

高田 弘樹

大学院理工学研 Hall coefficient measurement of Pb-substituted Bi-based
superconductors
究

Title

Effect on silicon surface chemistry under external mechanical
自然科学研究機
分子科学研究所
stress
構

山形大学

所属

49

中辻 寛

今井 恵利華

成島 哲也

羅 添文

氏名

機械的応力のシリコン表面化学への影響に関する研究

Pb 置換 BI 系超伝導体のホール係数測定

課題名

43

42

No.

ISSP Activity Report 2013

105

阿曽 尚文

セリウム系化合物における微小磁気モーメントの圧力下磁化測定

ホイスラー化合物 Fe2-xCoxMnSi の圧力下電気抵
伊藤 昌和
抗率

66

67

仲村 愛
平仲 裕一
白濱 圭也
高橋 大輔

〃

〃

回転希釈冷凍機を用いた量子固体・量子液体研
究

〃

73

74

75

仲間 隆男

72

価数揺動物質の高圧力中輸送特性の研究

大貫 惇睦

〃

70

71

本多 史憲

圧力下での磁気および価数ゆらぎが生み出す Eu
化合物の新しい電子状態の探索

69

山下 敏広

伊賀 文俊

TmB4 の磁気準周期秩序相における圧力効果

65

〃

久田 旭彦

PrBa2Cu4O8 と PrBa2Cu3O7-δ の混合セラミッ
クスの高圧下電気抵抗率測定

64

68

池田 大地

〃

Ni-Mn-Ga 系強磁性形状記憶合金の磁化の圧力依
安達 義也
存性

松本 佳大

63

62

〃

小山 佳一

Mn2-xCuxSb 磁性体の高圧下における磁気状態

60

61

中田 琢也

氏名

EuRu2P2 の高圧力下磁化測定 (2)

課題名

59

No.

足利工業大学慶應義塾大学

琉球大学

琉球大学

琉球大学

琉球大学

東北大学

鹿児島大学

鹿児島大学

琉球大学

茨城大学

徳島大学

山形大学

山形大学

鹿児島大学

鹿児島大学

山口大学

共通課程

〃

Studies of quantum fluids and solids using rotating dilution
refrigerators〃

大学院理工学研究科
理工学部〃

Transport properties of valence fluctuating compounds underpressure〃

大学院理工学研
究科

理学部

理学部

Investigation of exotic electronic properties of Eu compounds
金属材料研究所 driven by magnetic and valence fluctuation under highpressure

Daisuke Takahashi

Keiya Shirahama

Yuichi Hiranaka

Ai Nakamura

Takao Nakama

Yoshichika Onuki

Fuminori Honda

Ashikaga Institute ofTechnology

Keio University

University of the
Ryukyus

University of the
Ryukyus

University of the
Ryukyus

University of the
Ryukyus

Tohoku University

Toshihiro Yamashita Kagoshima University〃

大学院理工学研
究科

Kagoshima University

University of the
Ryukyus

Ibaraki University

The University ofTokushima

Masakazu Ito

Naofumi Aso

Fumitoshi Iga

Pressure effect on the magnetic quasi-period ordered phase in
TmB4
Magnetization studies under pressure in Ce-based compoundswith small magnetic moments

Akihiko HisadaElectrical resistivity of mixtures of PrBa2Cu4O8 and
PrBa2Cu3O7-δ ceramics under high pressure

Yamagata University

大学院理工学研 Electrical transport properties of Heusler compoundFe2-xCoxMnSi
究科

理学部

理学部

大学院ソシオ・アーツ・アンド・
サイエンス研究部

Daichi Ikeda

大学院理工学研
究科〃

Yoshiya Adachi

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

Yamagata University

Yoshihiro Matsumoto Kagoshima University

大学院理工学研
究科〃

Kagoshima University

Keiichi Koyama

Organization

大学院理工学研
Magnetic state of Mn2-xCuxSb magnet under high pressure
究科

Name

Yamaguchi University

Title

大学院理工学研 Magnetization measurements under high pressures in EuRu2P2
Takuya Nakada
(II)
究科

所属

106

ISSP Activity Report 2013
立木 智也
佐々木 豊
中野 智仁
安達 季並
井上 和朗
久保田 実
荒木 秀明
藤原 哲也
森田 哲広
大原 繁男
松本 裕司
小林 拓也
河江 達也
佐藤 由昌
古谷 圭一
仲間 隆男

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

希土類化合物の純良単結晶育成と圧力下電気抵
抗測定〃

固体ヘリウムの超流動に見られる様な「新規超流動現象の基礎研究」〃〃

磁化測定用対向アンビル型高圧力発生装置の開
発 (3)

〃

重い電子系反強磁性体 CeNiIn4 の圧力誘起量子
臨界現象の研究〃〃

重い電子系物質における 3He 温度領域での磁化
測定

〃

〃

遷移金属間化合物の高圧下における磁性と輸送
特性

78

79

80

81

82

83

84

85

86

87

88

89

90

91

92

村川 智

〃

回転希釈冷凍機を用いた量子固体・量子液体研
究

76

氏名

77

課題名

No.

〃

Studies of quantum fluids and solids using rotating dilution
refrigerators

琉球大学

九州大学

九州大学

九州大学

名古屋工業大学

名古屋工業大学

名古屋工業大学

山口大学

山口大学

Tetsuhiro Morita

大学院理工学研究科〃

大学院工学研究科

理学部

大学院工学府大学院工学府Magnetism and transport properties of intermetallic
compounds under high pressure〃〃

大学院工学研究 Magnetization measurements in 3He temperature region forheavy fermion systems
科

Yuji Matsumoto〃

大学院工学研究
科

Takao Nakama

Keiichi Furuya

Yoshiaki Sato

Tatsuya Kawae

Takuya Kobayashi

Shigeo Ohara

大学院工学研究 Study of pressure induced quantum critical phenomena forheavy fermion antiferromagnet CeNiIn4科〃

Tetsuya Fujiwara

Hideaki Araki

Minoru Kubota

Kazuo Inoue

大学院理工学研 Development of opposed-anvil type high pressure apparatus
for magnetization measurement (III)究科〃

長岡工業高等専
物質工学科
門学校

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

工学部

Kinami Adachi

大学院自然科学研究科〃

Tomohito Nakano

Yutaka Sasaki

Tsuiki Tomoya

Satoshi Murakawa

Name

大学院自然科学 Single-crystal growth of the rare-earth compound and lowtemperature resistivity under high pressure
研究科

低温物質科学研
Texture dynamics of rotating superfluid 3He究センター

大学院理工学研
究科

理工学部

Title

総合研究所

芝浦工業大学

芝浦工業大学

新潟大学

新潟大学

京都大学

慶應義塾大学慶應義塾大学所属

University of the
Ryukyus

Kyushu University

Kyushu University

Kyushu University

Nagoya Institute ofTechnology

Nagoya Institute ofTechnology

Nagoya Institute ofTechnology

Yamaguchi University

Yamaguchi University

Nagaoka National
College of Technology

Shibaura Institute ofTechnology

Shibaura Institute ofTechnology

Niigata University

Niigata University

Kyoto University

Keio University

Keio University

Organization

ISSP Activity Report 2013

107

蔵田 裕也

國松 貴之

〃

強磁性元素を含む非磁性半導体のフェルミ面計測108

109 新奇な量子相転移現象の数値的研究

三浦 尊

〃

107

原田 健自

小林 夏野

岩佐 泉

〃

106

青木 悠樹

捩り振り子測定による固体ヘリウム４のずれ弾
性測定

105

鳥塚 潔

鎌田 尚史

超流動ヘリウム 3-A1 相におけるスピン流に伴う山口 明
電場効果の検出〃104 有機分子性導体の高圧物性の研究

103

102

101

石川 修六

松川 周矢

〃

99

100 超流動ヘリウム 3-A 相の半整数量子渦の研究

井村 敬一郎〃中間価数状態を示す SmS ならびに Yb 系準結晶・
出口 和彦
近似結晶における高圧下物性研究

〃

繁岡 透

98

97

96

多形化合物 RIr2Si2(R= 希土類）の磁気転移

上門 太郎

〃

94

95

照屋 淳志

遷移金属間化合物の高圧下における磁性と輸送
特性

93

氏名

課題名

No.

京都大学

青山学院大学

東京工業大学

神奈川大学

東京工業大学法政大学

兵庫県立大学

兵庫県立大学

大阪市立大学

大阪市立大学

名古屋大学

名古屋大学

名古屋大学

山口大学

山口大学

琉球大学

琉球大学
Taro Uejyo

Keiichiro Imura〃〃

大学院理学研究科
大学院理学研究科

Studies on high pressure properties of organic molecular
conductors〃

Kaya Kobayashi

Takeru Miura

Izumi Iwasa

Yuki Aoki

Kiyoshi Torizuka

Naofumi Kamada

大学院情報学研
Numerical study of unconventional quantum phase transitions Kenji Harada
究科

Measuring Fermi surfaces of paramagnetic semiconductors
containing ferromagnetic elements〃

大学院総合理工
学研究科
理工学部

〃

理学部

大学院総合理工 Shear modulus measurement of solid helium-4 by torsional
oscillator
学研究科

理工学部

大学院物質理学研究科

大学院物質理学 Detection of an electrical field induced by spin current insuperfluid 3He-A1 phase
研究科

Akira Yamaguchi

Kyoto University

Aoyama Gakuin
University

Tokyo Institute ofTechnology

Kanagawa University

Tokyo Institute ofTechnology

Hosei University

The Univerisity of
Hyogo

The Univerisity of
Hyogo

Takayuki Kunimatsu Osaka City University〃

大学院理学研究科

Osaka City University

Osamu Ishikawa

Nagoya University

Nagoya University

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

Shuya Matsukawa

Kazuhiko Deguchi

大学院理学研究 High-pressure study on mixed-valence SmS, Yb-quasi and-approximant crystals
科

Nagoya University

Yamaguchi University

Yuya Kurata

大学院理工学研
究科〃

Yamaguchi University

University of the
Ryukyus

University of the
Ryukyus

Organization

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

大学院理工学研
究科

Name
Atsushi Teruya

Title

大学院理工学研 Magnetism and transport properties of intermetallic
compounds under high pressure
究科

所属

108

ISSP Activity Report 2013

課題名

中野 晃佑
篠崎 彩子
関根 ちひろ〃高温高圧下おいて水素分子がコーサイトの結晶構造に与える影響

充填スクッテルダイト構造を有する新超伝導体
の物質探索

〃

118

119

120

121

〃

〃

126 造礁性サンゴ骨格の微細組織観察125

124 新規 C-N 系化合物の超高圧合成

123

122 新規 B1 型酸化物固溶体の超高圧合成

吉井 龍太

〃

117

甕 聡子

小田 喬史

長谷川 正

嶋田 大輝

長谷川 正

崔 云

山本 隆文

〃

高圧下におけるペロブスカイト Eu(Ti,Zr)O3 の構
陰山 洋
造変化

篠崎 彩子

鈴木 健太郎116

115

114 高圧下におけるベンゼンの重合反応

〃

113

北海道大学

名古屋大学

名古屋大学

名古屋大学

名古屋大学

室蘭工業大学

室蘭工業大学

東京大学

京都大学

京都大学

京都大学

京都大学

東京大学

名古屋大学

名古屋大学

高圧その場ラマン散乱測定による後期遷移金属
多窒化物の窒素状態の評価

112

丹羽 健

愛媛大学

京都大学

Fe-MgSiO3-H2 系の高温高圧下におけるふるまい
八木 健彦
の解明

和氣 剛

氏名

111

110 Fe6W6C の異常な熱膨張

No.

Title

〃

Un Sai

大学院工学研究
科

Hiroki Shimada

大学院工学研究
科

Takashi Oda
Satoko Motai〃
Observation on crystallographic texture of reef-building coralskeleton

大学院工学研究科
大学院理学院

Masashi Hasegawa

大学院工学研究High pressure syntheses of novel C-N compounds
科〃

Masashi Hasegawa

大学院工学研究High pressure syntheses of novel B1-type oxide solid solutions
科〃

Chihiro Sekine

Ayako Shinozaki

Kousuke Nakano

大学院工学研究 Search for new superconductors with filled-skutterudite
structure科

大学院理学系研 Effect of hydrogen molecules to crystal structure of coesite
under high pressure
究科〃

大学院工学研究
科

Hokkaido University

Nagoya University

Nagoya University

Nagoya University

Nagoya University

Muroran Institute ofTechnology

Muroran Institute ofTechnology

The University ofTokyo

Kyoto University

Kyoto University〃

大学院工学研究
科

Ryuta Yoshii

Takafumi Yamamoto Kyoto University〃

大学院工学研究
科

Kyoto University

The University ofTokyo

Nagoya University

Nagoya University

Ehime University

Kyoto University

Organization

Hiroshi Kageyama

Ayako Shinozaki

Kentaro Suzuki

Ken Niwa

Takehiko Yagi

Takeshi Waki

Name

大学院工学研究
Structural change in Eu(Ti,Zr)O3 under high pressure科

大学院理学系研
Polymerization of benzene under high pressure condition.
究科

大学院工学研究科

地球深部ダイナ
Behavior of Fe-MgSiO3-H2 system under high pressure andミクス研究セン
temperature condition
ター
Evaluation for bonding character of dinitrogen in transition
大学院工学研究
metal pernitrides inferred from high-pressure in-situ Raman
科
scattering measurements

大学院工学研究
Anomalous thermal expansion in Fe6W6C科所属

ISSP Activity Report 2013

109

氏名

〃

ドロクサリブ
ロラス
ティンブル
飯田 勇気

〃

〃

134

135

上田 涼平

〃

139

真中 浩貴

呉 麻美子

〃

142

143 三角スピンチューブのスピンダイナミクス

石井 梨恵子〃141

古川 はづき

田中 和彦

〃

138

140 空間反転対称性の破れた超伝導体の結晶性評価

三好 正悟

〃

137

山口 周

東京大学

田中 和彦

〃

133

136 溶融亜鉛メッキ合金相の応力誘起変態

東京大学

三好 正悟

〃

132

Gen Shimura

Dai Tanaka

大学院理学研究科〃

大学院工学系研
究科

鹿児島大学

大学院理工学研
Spin dynamics of triangular spin tubes
究科〃

お茶の水女子大 大学院人間文化学
創成科学研究科

Hirotaka Manaka

Mamiko Kure

Rieko Ishii

Ryohei Ueda〃〃

大学院工学系研
究科

Kazuhiko Tanaka

お茶の水女子大 大学院人間文化学
創成科学研究科〃

大学院工学系研
究科

Shogo Miyoshi

Shu Yamaguchi

Yuki Iida

Doloksaribu Rolas
TimbulHazuki Furukawa〃

大学院工学系研
究科

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

〃

〃

大学院工学系研
究科
大学院工学系研
究科

Shogo Miyoshi〃

大学院工学系研
究科

Kazuhiko Tanaka

Shu Yamaguchi

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

Masaya Sougawa

大学院理学研究
Synthesis of superhard carbon nitride at high temperature (II)科〃

大学院工学研究科

Name
Ken Niwa

Title

大学院工学研究 High pressure synthesis of IV group transition metal carbides
using large volume high pressure apparatus
科所属

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

東京大学

東京大学

東京大学

東京大学

東京大学

東京大学

東京大学

山口 周

超高圧プレスを用いた新規プロトニクス酸化物のソフト化学的合成法の検討

131

岡山理科大学

田中 大〃

岡山理科大学

名古屋大学

名古屋大学

130

寒川 匡哉

志村 元

大型プレスを用いた IV 族遷移金属炭化物の高圧
丹羽 健
合成

課題名

129 超硬質窒化炭素の高温高圧合成 (2)

128

127

No.

Kagoshima University

Ochanomizu
University

Ochanomizu
University

Ochanomizu
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

Okayama University of
ScienceOkayama University of
Science

Nagoya University

Nagoya University

Organization

110

ISSP Activity Report 2013

課題名

Rieko Ishii

〃

〃

呉 麻美子

〃

158

160

〃

中田 琢也

藤原 哲也

石井 梨恵子〃157

159 重い電子系新物質 Ce2Pt3Ge5 の比熱測定 (2)古川 はづき空間反転対称性の破れた超伝導体のヘリカル磁束格子の観測

156

清原 達也

〃

高津 浩

谷口 智洋

155

154 スピン液体 Tb2Ti2O7 の比熱測定

153

門脇 広明

納谷 麻衣子

古川 はづきTomohiro Taniguchi

大学院理工学研
究科

Tatsuya Kiyohara

大学院理工学研
究科

山口大学

山口大学

〃

お茶の水女子大 大学院人間文化学
創成科学研究科

Takuya Nakada

大学院理工学研
究科〃

Tetsuya Fujiwara

大学院理工学研 Specific heat measurement in new heavy fermion system
Ce2Pt3Ge5 (II)究科

Mamiko Kure

Yamaguchi University

Yamaguchi University

Ochanomizu
University

Ochanomizu
University
Rieko Ishii〃

お茶の水女子大 大学院人間文化学
創成科学研究科Tokyo Metropolitan
University

Tokyo Metropolitan
University

Tokyo Metropolitan
University

Tokyo Metropolitan
University

Ochanomizu
University〃

Hiroshi Takatsu

大学院理工学研 Specific heat measurements on a spin liquid candidate
Tb2Ti2O7
究科〃

Hiroaki Kadowaki

大学院理工学研
Quantum spin liquid in Tb2Ti2O7
究科

Ochanomizu
University

Ochanomizu
University

Ochanomizu
University

Ochanomizu
University

Ochanomizu
University

Tohoku University

University of the
Ryukyus

University of Tsukuba

Organization

お茶の水女子大 大学院人間文化
Helical vortex phase on non-centrosymmetric superconductors Hazuki Furukawa
学
創成科学研究科

首都大学東京首都大学東京首都大学東京首都大学東京Maiko Naya

お茶の水女子大 大学院人間文化学
創成科学研究科〃

Hazuki Furukawa

お茶の水女子大 大学院人間文化
Anomalous vortex state of Sr2RuO4
学
創成科学研究科〃

お茶の水女子大 大学院人間文化学
創成科学研究科〃

石井 梨恵子Hazuki Furukawa

Hazuki Furukawa

Taku Sato

Naofumi Aso

Miwako Takahashi

Name

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

152 Tb2Ti2O7 における量子スピン液体状態の研究

151

Crystal quality evaluation of large single crystals for neutron
scattering

Characterization for a single crystal of ternary alloy CuFePt6

多元物質科学研 Quality check of Fe-based superconductor related materials
using high energy X-ray diffraction
究所

理学部

数理物質系

Title

ErNi2B2C とその関連物質における自発的磁束格
古川 はづき子の観測150 Sr2RuO4 の異常金属状態の研究

149

148

東北大学

琉球大学

筑波大学

所属

お茶の水女子大 大学院人間文化 Anomalous magnetic form factor in the vortex state on
学
創成科学研究科 CeCoIn5

佐藤 卓

阿曽 尚文

高橋 美和子氏名

古川 はづき鉄系超伝導体関連物質の高エネルギー X 線回折による単結晶試料確認

147 CeCoIn5 の磁束の磁気形状因子の異常

146

145 中性子散乱研究用大型単結晶試料の結晶性評価

144 三元合金 CuFePt6 単結晶の評価

No.

ISSP Activity Report 2013

111

課題名

土屋 政人
菊池 彦光

〃

幾何学的フラストレート磁性体の強磁場磁化測
定

176

177

海老原 孝雄

中東 太一

〃

174

175 希土類金属間化合物の強磁場物性研究

今井 正樹

道岡 千城

福井 博章

〃

価数揺動状態にある Yb 化合物 YbInCu4 のYb-In 固溶系における強磁場磁化過程

〃

173

172

171

浅野 貴行

170 モリブデン酸銅の強磁場磁化過程とサイズ効果

山下 敏広
稲垣 祐次

〃

伊藤 昌和

森田 哲広

169 パルス磁場下比熱測定法による物性研究

168

167 スピネル FeCr2S4 の高磁場物性

〃

繁岡 透

165 (Ho,Gd)Rh2Si2 単結晶の高磁場磁化 2

166

佐藤 卓

164 複合スピン系の比熱測定

蔵田 裕也
佐藤 卓

〃

繁岡 透

氏名

163 鉄系超伝導体関連物質の輸送特性

162

161 多形化合物 RIr2Si2（R= 希土類）の磁気特性

No.

福井大学

静岡大学

静岡大学

京都大学

京都大学

京都大学

九州大学

九州大学

九州大学

鹿児島大学

鹿児島大学

山口大学

山口大学

東北大学

東北大学

山口大学

山口大学
Yuya Kurata

Taku Sato
Toru Shigeoka
Tetsuhiro Morita

多元物質科学研Heat capacity of complex spin system
究所
大学院理工学研High field magnetization of (Ho,Gd)Rh2Si2 single crystal (2)究科
大学院理工学研
究科〃

大学院理学研究科

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

Hikomitsu Kikuchi

Masato Tsuchiya

大学院理学研究
科〃

Takao Ebihara

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

Taichi Nakahigashi

University of Fukui

Shizuoka University

Shizuoka University

Kyoto University

Kyoto University

Masaki Imai〃

大学院理学研究
科

Kyushu University
Kyoto University

Hiroaki Fukui

Kyushu University

大学院理学研究 High field magnetization of a valence fluctuated Yb compound
Chishiro Michioka
YbInCu4 and its family compounds
科〃

Takayuki Asano

大学院理学研究 High-field magnetization process and size effect in copper
molybdate院
大学院理学府

Yuji Inagaki

大学院工学研究 High field study by specific heat measurements under pulsed
magnetic field
院

Kyushu University

Toshihiro Yamashita Kagoshima University〃

大学院理工学研
究科

Kagoshima University

Masakazu Ito

Yamaguchi University

Yamaguchi University

Tohoku University

Tohoku University

Yamaguchi University

Yamaguchi University

Organization

大学院理工学研
Magnetic properties of spinel FeCr2S4 in high magnetic field
究科〃

Taku Sato

多元物質科学研 Transport properties of Fe-based superconductor relatedmaterials
究所〃

大学院理工学研
究科

Name
Toru Shigeoka

Title

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

所属

112

ISSP Activity Report 2013

〃

181

天谷 直樹
菊地 健太郎

〃

〃

186

187

〃

190

茨城大学

近藤半導体 (Yb,R)B12 のワンターンコイル 120T
伊賀 文俊
パルス磁場下での強磁場磁化過程

194

東京大学

豊田 新悟

〃

193

東京大学

阿部 伸行

東京大学

九州大学

九州大学

〃

有馬 孝尚

川見 洋一郎

浅野 貴行

Title

Hiroki Tominaga〃

大学院理学系研
究科

理学部〃

大学院新領域創成科学研究科High field magnetization of Kondo insulator (Yb,R)B12 by using
Fumitoshi Iga
one-turn coil in a 120 T pulse magnet

Shingo Toyoda

Nobuyuki Abe〃

大学院新領域創成科学研究科Yoichiro Kawami
Taka-hisa Arima〃

Takayuki Asano

Keisuke Sato

大学院新領域創 Directional birefringence in boracite-type magnetic
ferroelectrics
成科学研究科

大学院理学府大学院理学研究 Low-dimensionality and geometrically frustrated effect incorner- and edge-sharing tetrahedra
院

Field induced spin-state transition in LaCo1-xRhxO3

Naoki Amaya〃

大学院理学系研
究科

Kentaro Kikuchi

Yuko Hosokoshi

大学院理学系研 High-field magnetization measurements of new organic
polyradical magnets
究科〃

大学院理学系研
究科

Fumitoshi Iga

Kento Hayashi

Fumitoshi Iga

Toshio Ono

Magnetic property of rare earth dodecaborides produced byhigh pressure synthesis〃

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

Yoshikazu Tabata

Yasunori Asano

Name

大学院理学系研 Magnetization plateaux in triangular antiferromagnet mixture
system Cs2CuCl4-xBrx
究科

理学部

大学院理工学研
究科

理学部

大学院工学研究 High field magnetic properties of the strongly correlated
narrow-gap semiconductor Fe1-xMnxSb2
科

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

所属

茨城工業高等専
自然科学
門学校

大阪府立大学

大阪府立大学

大阪府立大学

大阪府立大学

大阪府立大学

茨城大学

茨城大学

茨城大学

京都大学

福井大学

192

191 ボラサイト型磁性強誘電体における方向複屈折

頂点及び辺共有した四面体の低次元性と幾何学
的競合効果

189

佐藤 桂輔

細越 裕子

新しい有機ポリラジカル磁性体の強磁場磁化測定185188 単結晶 LaCo1-xRhxO3 の強磁場磁化

富永 紘基

〃

三角格子反強磁性体混晶系 Cs2CuCl4-xBrx の磁化
小野 俊雄
プラトー

伊賀 文俊

184

183

182 高圧合成希土類 12 ホウ化物の磁化特性

伊賀 文俊

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

180
林 健人

田畑 吉計

浅野 泰典

強相関ナローギャップ半導体 Fe1-xMnxSb2 の強磁場物性

幾何学的フラストレート磁性体の強磁場磁化測
定

178

氏名

179

課題名

No.

Ibaraki University

The University ofTokyo

The University ofTokyo

The University ofTokyo

Kyushu University

Kyushu University

Ibaraki National
College of Technology

Osaka Prefecture
University

Osaka Prefecture
University

Osaka Prefecture
University

Osaka Prefecture
University

Osaka Prefecture
University

Ibaraki University

Ibaraki University

Ibaraki University

Kyoto University

University of Fukui

Organization

ISSP Activity Report 2013

113

香取 浩子
斉藤 大地

フラストレーションを有する磁性体の強磁場下
での振舞い

〃

203

204

〃

208

211

マイクロリボン化によるグラフェンの超高速キャリアダイナミクスの変調
吹留 博一

武田 さくらCu(111) 上に作製した BDTDA ラジカル単層膜に
山本 真幸
おける LEED I-V 実験

210 歪半導体の表面近傍の歪み量の精密測定

209

松平 和之

導電性パイロクロア型酸化物の強磁場下の物性
研究

207
坂本 健

松川 周矢

〃

206

出口 和彦

福井 博章

〃

202

205 強磁場による中間価数状態を示す準結晶の研究

浅野 貴行

パルス磁場による磁場誘起クロミズムの直接観
測

佐藤 桂輔

201

200 コバルト酸化物の磁気形状記憶効果

赤羽 栄介

太田 寛人

198 コバルトヒ素伝導面を有する化合物の磁化過程

〃

小林 夏野

カルコパイライト型カルコゲン化合物の強磁場
物性の探索

197

199

東京工業大学岡 研吾

BiCo1-x(Fe,Ni)xO3 のパルス強磁場中磁気電気効
果の観察

196
Investigation of novel properties on chalcopyrite typechalcogenides in high magnetic fields

大学院工学府

〃

東北大学

Name

〃

Takeru Sakamoto

Kazuyuki Matsuhira

Kyushu Institute ofTechnology

Kyushu Institute ofTechnology

電気通信研究所 Modulated ultrafast carrier dynamics of graphene micro-ribbon Hirokazu Fukidome

Sakura Takeda

Tohoku University

Nara Instituteof Science andTechnology

University of
医学工学総合研 LEED I-V experiment on BDTDA radical monolayer formed on
Masayuki Yamamoto
Cu(111)
Yamanashi
究部

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

Shuya Matsukawa

Nagoya University〃

大学院理学研究科

Daichi Saito

Tokyo Universityof Agriculture andTechnology
Tokyo Universityof Agriculture andTechnology

Kyushu University

Kyushu University

Ibaraki National
College of Technology

Tokyo Universityof Agriculture andTechnology
Tokyo Universityof Agriculture andTechnology

Aoyama Gakuin
University

Tokyo Institute ofTechnology

Nagoya University〃

Hiroko Katori

Hiroaki Fukui

Takayuki Asano

Keisuke Sato

Eisuke Akabane

Hiroto Ohta

Kaya Kobayashi

Kengo Oka

Ibaraki University

Organization

大学院理学研究High magnetic field experiments of mixed-valence quasicrystal Kazuhiko Deguchi科

大学院工学府大学院工学研究
Properties of frustrated magnets in high magnetic fields
院

大学院理学府大学院理学研究 Direct observation of field-induced chromism in high pulsed
magnetic fields
院

Magnetic shape memory effect in cobalt oxide〃

大学院工学研究 Magnetic behavior of compounds with cobalt pnictide
conducting planes
院

理工学部

応用セラミック Investigation of the electro-magnetic effect in
BiCo1-x(Fe,Ni)xO3 under pulsed magnetic field
ス研究所

奈良先端科学技 物質創成科学研 Precise measurement of strain in the subsurface region ofstrained semiconductors
術大学院大学
究科

山梨大学

九州工業大学

九州工業大学

名古屋大学

名古屋大学

東京農工大学

東京農工大学

九州大学

九州大学

Title

大学院理工学研 High field magnetization of Kondo insulator (Yb,R)B12 by using
Katsuya Ishii
one-turn coil in a 120 T pulse magnet
究科所属

茨城工業高等専
自然科学
門学校

東京農工大学

東京農工大学青山学院大学

茨城大学

氏名

近藤半導体 (Yb,R)B12 のワンターンコイル 120T
石井 克弥
パルス磁場下での強磁場磁化過程

課題名

195

No.

114

ISSP Activity Report 2013
雨海 有佑
水野 博貴
田中 慎一郎
横山 淳
藤村 健司
梅尾 和則

〃

〃

HREELS によるグラファイトにおける電子格子
散乱の直接測定

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〃

Pr 内包カゴ状化合物 PrIr2Zn20 の超伝導転移と四極子秩序に対する圧力効果

223

224

225

226

227

228

広島大学

茨城大学

茨城大学

大阪大学

室蘭工業大学

室蘭工業大学

室蘭工業大学村山 茂幸

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

222

東京大学
愛媛大学

吉清 まりえ

〃

220

東京大学

Fe-MgSiO3-H2 系の高温高圧下におけるふるまい
飯塚 理子
の解明

生井 飛鳥

〃

219

東京大学

金沢大学

221

大越 慎一

テラヘルツ分光装置を用いた酸化物磁性材料の
研究

218

大橋 政司

大阪大学

高温超伝導体 Bi2212 におけるラマン散乱スペク
宮坂 茂樹
トルと角度光電子分光スペクトルの定量的比較

216

217 希土類磁性体の異方的磁気体積効果

東京大学

園部 竜也

角度分解光電子分光による鉄系超伝導体における擬ギャップの研究

215

東京大学

堀尾 眞史

〃

214

東京大学

東京大学

岡崎 浩三

坂野 昌人

極低温超高分解能レーザー光電子分光装置による超伝導ギャップ測定

強いスピン軌道相互作用を有する空間反転対称性の破れた物質の電子状態

212

氏名

213

課題名

No.

Title

Masafumi Horio

大学院理学系研
究科〃

大学院理学系研
究科〃

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

Pressure effect on the superconducting and自然科学研究支
antiferroquadrupolar transitions in a caged compound
援開発センター
PrIr2Zn20

大学院理工学研
究科

理学部

Direct measurement of the electron-phonon scattering ingraphite by using HREELS〃大学院工学研究科
産業科学研究所

Yusuke Amakai〃

大学院工学研究
科

Kazunori Umeo

Kenji Fujimura

Makoto Yokoyama

Shin-ichiro Tanaka

Hiroki Mizuno

Shigeyuki Murayama

Riko Iizuka

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

地球深部ダイナ
Behavior of Fe-MgSiO3-H2 system under high pressure andミクス研究セン
temperature condition
ター

Asuka Namai〃

大学院理学系研
究科

Marie Yoshikiyo

Shin-ichi Ohkoshi

Masashi Ohashi

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

Anisotropic magnetovolume effect of rare earth compounds

Shigeki Miyasaka

Quantitative comparison between electronic Raman spectra
大学院理学研究and angle-resolved photoemission spectra on high-Tc
科
superconductor Bi2212

理工研究域

Tatsuya Sonobe

大学院工学系研
APRES study on pseudogap in Iron-pnictides
究科〃

Kozo Okazaki

Masato Sakano

Name

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

大学院工学系研 Electronic structures of strongly spin-orbit coupled
noncentrosymmetric materials
究科所属

Hiroshima University

Ibaraki University

Ibaraki University

Osaka University

Muroran Institute ofTechnology

Muroran Institute ofTechnology

Muroran Institute ofTechnology

Ehime University

The University ofTokyo

The University ofTokyo

The University ofTokyo

Kanazawa University

Osaka University

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

Organization

ISSP Activity Report 2013

115

緒方 勇大

〃

242

ゾビレイ
高温超伝導体 Bi2212 におけるラマン散乱スペク
ティルマン
トルと角度光電子分光スペクトルの定量的比較
レナルト

兼松 佑典

〃

241

243

立川 仁典

水素結合型分子性機能物質における重水素効果の理論的解析

240

朱 思源

キョ キョウ

超強磁場を利用した NiMn 基低温異常現象の起
源解明

238

239 新奇トポロジカル絶縁体の 2 光子光電子分光

琉球大学

柄木 良友

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

237

大阪大学

横浜市立大学

横浜市立大学

横浜市立大学

広島大学

東北大学

大阪大学

マルチフェロイックな CuO における強磁場中の木村 剛
電気磁気相図に関する研究

名古屋大学

東京大学

埼玉大学

埼玉大学

236

235 NMR による有機三角格子物質の基底状態の研究 清水 康弘

笠原 裕一

山崎 泰由

〃

233

234 MoS2 電界誘起超伝導の上部臨界磁場

高宮 健吾

〃

埼玉大学

顕微分光による Er ドープ GaAs の発光特性に関
矢口 裕之
する研究

231

232

大阪大学

木村 健太

スピン正四面体を内包する希土類磁性体の極低
温磁化測定

230

広島大学

菅野 雄介

Pr 内包カゴ状化合物 PrIr2Zn20 の超伝導転移と四極子秩序に対する圧力効果

229

氏名

課題名

No.

Title
Yusuke Sugano

Name

Kengo Takamiya〃〃

大学院理工学研
究科
大学院理工学研
究科

Yasuhiro Shimizu

大学院理学研究 NMR study for the ground state of organic triangular latticematerials科

大学院生命ナノ
Theoretical analysis of deuterated effect on hydrogen-bonded
システム科学研
molecular materials
究科
大学院生命ナノ〃システム科学研
究科
大学院生命ナノ〃システム科学研
究科
Quantitative comparison between electronic Raman spectra
大学院理学研究and angle-resolved photoemission spectra on high-Tc
科
superconductor Bi2212

Sobirey Tilman
LennartYudai Ogata

Yusuke Kanematsu

Masanori Tachikawa

Zhu Siyuan

Osaka University

Yokohama City
University

Yokohama City
University

Yokohama City
University

Hiroshima University

University of the
Ryukyus

大学院理学研究 Two photon photoemission spectroscopy of exotic topologicalinsulators
科

Yoshitomo Karaki

Tohoku University

Low temperature magnetism of triangular lattice
antiferromagnet NaM(Acac)3benzene (M=Ni,Mn,Fe)

Osaka University

Nagoya University

The University ofTokyo

Saitama University

Saitama University

Saitama University

Osaka University

Hiroshima University

Organization

大学院工学研究 Clarification of the origin of anomalous behaviors at low
Xiao XU
temperature under strong magnetic field in NiMn based alloys
科

教育学部

大学院基礎工学 Investigation of magnetoelectric phase diagram in multiferroic
Tsuyoshi Kimura
CuO
研究科

Yuichi Kasahara

Upper critical field of electric-field-induced superconductivity
大学院工学系研in MoS2
究科

Yasuyuki Yamazaki

Hiroyuki Yaguchi

大学院理工学研
Micro photoluminescence study of Er doped GaAs
究科

大学院基礎工学 Magnetization measurements of the spin tetrahedral rare-earth
Kenta Kimura
magnet at very low temperatures
研究科

Pressure effect on the superconducting and
大学院先端物質
antiferroquadrupolar transitions in a caged compound
科学研究科
PrIr2Zn20

所属

116

ISSP Activity Report 2013

課題名

氏名

所属

増田 直也
山浦 淳一
瀬戸 雄介
松本 恵
森家 智嗣
酒井 碧
シュタウス
スヴェン
姫野 翔平
松平 和之

〃

遷移金属酸窒化物、金属間化合物における構造
物性研究

コンドライト母天体における含揮発性元素鉱物の形成環境の推定〃〃〃

超臨界流体中レーザーアブレーションによるダイヤモンドイド合成の分光学的診断による反応
機構の探索

〃

パイロクロア型希土類酸化物の単結晶育成と磁気フラストレーションの研究

3

4

5

6

7

8

9

10

11

九州工業大学

東京大学

東京大学

神戸大学

神戸大学

神戸大学

神戸大学

東京工業大学

京都大学

京都大学

京都大学

Megumi Matsumoto〃〃〃

研究基盤センター
大学院理学研究科
大学院理学研究科

大友 順一郎高温高圧水を用いた医療廃棄物の小型オンサイ
ト処理システムの開発〃

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

1

2

3

大友 順一郎

長澤 祐介

氏名

課題名

No.

東京大学

東京大学

東京大学

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

Junichiro Otomo

Yusuke Nagasawa

大学院新領域創成科学研究科〃

Junichiro Otomo

Name

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

Title

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

Kazuyuki Matsuhira

Shohei Himeno

大学院新領域創成科学研究科〃Sven Stauss

Investigation of the reaction mechanisms of diamondoid
大学院新領域創
synthesis by laser ablation in supercritical fluids by
成科学研究科
spectroscopic diagnostics

Midori Sakai

Satoshi Moriya

Yusuke Seto

Junichi Yamaura

大学院理学研究 Formation environment of volatile element rich minerals onchondrite's parent bodies
科

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

大学院工学研究
科
Naoya Masuda

Kei Asai〃

大学院工学研究
科

Name

Name

Yoji Kobayashi

Title

Title

大学院工学研究 The effect of anion manipulation on structural transitions in
ReO3/VF3 type compounds
科所属

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

淺井 啓

〃

2

小林 洋治

氏名

ReO3・VF3 型化合物の構造転移に関するアニオ
ン操作の影響

課題名

1

No.

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

No.

The University ofTokyo

The University ofTokyo

The University ofTokyo

Organization

Kyushu Institute ofTechnology

The University ofTokyo

The University ofTokyo

Kobe University

Kobe University

Kobe University

Kobe University

Tokyo Institute ofTechnology

Kyoto University

Kyoto University

Kyoto University

Organization

Organization

ISSP Activity Report 2013117〃

高温高圧水中における固体酸・塩基触媒反応の速度論的解析

〃

8

9

10

原田 慧

〃

13

有馬 孝尚
阿部 伸行
佐賀山 基
松浦 慧介
豊田 新悟
植松 大介

〃

フラストレート磁性とスピン軌道相互作用の協調・競合効果

〃

〃

〃

〃

〃

14

15

16

17

18

19

20

板子 健太郎梶 智大〃

酸化セリウム - 金属微粒子系のキャラクタリゼー
佐々木 岳彦ション

秋月 信

大友 順一郎

高坂 文彦

12

11

金属酸化物の酸化還元反応における担体効果の
検討

7

東京大学

東京大学

東京大学

東京大学

東京大学

東京大学

東京大学

東京大学

東京大学

東京大学

東京大学

東京大学

東京大学

東京大学

東京大学

オーチェン
ジェームズ
オーチェン

〃

6
大友 順一郎東京大学

大友 順一郎ぺロブスカイト型酸化物を用いたケミカルルー
ピングシステムの開発

5

東京大学

松本 祐太

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

4

氏名

課題名

No.

Title

Fumihiko Kosaka

Makoto Akizuki

大学院新領域創成科学研究科Nobuyuki Abe

〃
〃
〃
〃
〃

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

Daisuke Uematsu

Shingo Toyoda

Keisuke Matsuura

Hajime Sagayama

Taka-hisa Arima

Kentaro Itako

大学院新領域創 Interplay between frustrated magnetism and spin-orbit
interaction
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Tomohiro Kaji〃

大学院新領域創成科学研究科Kei Harada

Takehiko Sasaki

大学院新領域創Characterization of cerium oxide with metal nanoparticles
成科学研究科〃

Junichiro Otomo

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

大学院新領域創成科学研究科

Ochieng James
Ochieng
Junichiro Otomo〃

Junichiro Otomo

Yuta Matsumoto

Name

大学院新領域創
Effect of support material on redox reaction of metal oxide
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 Study on perovskite based oxygen carrier materials for CLC/
CLR applications
成科学研究科

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

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

The University ofTokyo

Organization

118

ISSP Activity Report 2013東京大学

櫻井 健一朗

酸化物イオン伝導体とプロトン伝導体を用いた
新規二次電池の開発〃

SOFC 空気極性能に対する製造プロセス由来微量
大友 順一郎
成分の影響評価26

27〃

ケミカルループ燃焼における酸化物イオン伝導体を用いた酸素キャリア材料の還元反応特性〃

タングステン酸ランタンにおけるプロトン伝導率に与える影響因子の評価

〃

31

32

33

34

35

37

庄野 洋平

大友 順一郎

磯貝 俊介

大友 順一郎

野田 直人

大友 順一郎

大石 淳矢

名越 詩織

〃

門田 稔

プロトン伝導性リン酸ガラス - セラミックスの微大友 順一郎構造観察とイオン伝導特性

アンモニア分解及び合成反応における電気化学
特性と速度論解析

30

36

〃

29

28

東京大学

大友 順一郎〃25

大友 順一郎高温高圧水中における層状固体酸触媒反応の基
礎研究

24

東京大学

東京大学

東京大学

東京大学

東京大学

東京大学

東京大学

東京大学

東京大学

東京大学

東京大学

東京大学

京都大学

森下 翔

〃

23

京都大学

京都大学

小林 慎太郎

植田 浩明〃

3d 遷移金属の三角格子をもつ新規層状化合物の
物性評価

21

氏名

22

課題名

No.

Title

Name

Kenichiro Sakurai

大学院新領域創成科学研究科

Junya Oishi

大学院新領域創成科学研究科

Naoto Noda

大学院新領域創成科学研究科Yohei Shono

大学院新領域創成科学研究科

Minoru Kadota

大学院新領域創成科学研究科〃

Junichiro Otomo

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

Junichiro Otomo

大学院新領域創 Study on physicochemical properties for proton conductivity
in lanthanum tungstate
成科学研究科The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo
Shunsuke Isogai

大学院新領域創成科学研究科〃The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

大学院新領域創 Reduction kinetics of oxygen carrier using oxide ion conductor
Junichiro Otomo
in chemical-looping combustion
成科学研究科〃

Junichiro Otomo

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

Junichiro Otomo

大学院新領域創 Evaluation of the effects of minor components derived fromproduction processes on SOFC cathode performance
成科学研究科〃

Otomo Junichiro

Shiori Nagoya

大学院新領域創 Development of novel rechargeable battery using oxide ion
and proton conductors
成科学研究科〃The University ofTokyo

Kyoto University

大学院新領域創成科学研究科

Haruka Morishita

Kyoto University

The University of
Tokyo

〃

大学院理学研究
科

Shintaro Kobayashi

Kyoto University

Organization

大学院新領域創 Fundamental research of layered solid acid catalyzed reaction
Junichiro Otomo
in sub- and supercritical water.
成科学研究科〃

大学院理学研究科

大学院理学研究 Characterization of novel layered compounds with a triangular
Hiroaki Ueda
lattice of 3d transition metals
科所属

ISSP Activity Report 2013

119

〃

39

生駒 健太郎
大友 順一郎〃

酸化物イオン伝導体を担体に用いた金属酸化物の還元反応機構の解明〃

新規エネルギー変換デバイスに用いる複合セラ
ミックス電解質材料のイオン輸送現象の研究

〃

43

44

45

46

47

糸井 充穂
占部 継一郎
坪内 賢太
細野 英司
篠崎 彩子

〃

多重安定性を示す光誘起分子磁性体のサイズ効
果の研究

超臨界二酸化炭素中パルスレーザーアブレー
ションの分光診断法開発

太陽電池級シリコンの新規製造法の開発

ナノ構造制御に基づく蓄電池材料開発

高温高圧下における水素によるエンスタタイトの安定性、相関係への影響

49

50

51

52

53

54

横 哲

超臨界水熱合成における複合酸化物ナノ粒子生成機構の解明48

大友 順一郎

宮崎 顕也

大友 順一郎

菊池 典晃

大友 順一郎高温高圧水を利用した有機修飾微粒子の連続式
合成技術の開発

42

伊原 冬樹

〃

固体酸化物形燃料電池の電極 - 電解質界面におけ大友 順一郎るカチオンの拡散挙動

4140

大友 順一郎結晶界面における無機複合型プロトン電解質の合成とイオン伝導度の評価

38
岩永 愛季

氏名

課題名

No.

Aki Iwanaga

大学院新領域創成科学研究科

Fuyuki Ihara

大学院新領域創成科学研究科

Kentaro Ikoma

大学院新領域創成科学研究科

Noriaki Kikuchi

大学院新領域創成科学研究科Kenya Miyazaki

大学院新領域創成科学研究科

東京大学

大学院理学系研 Influence of H2 fluid on the stability and phase relation of
enstatite under high pressure and high temperature
究科

Ayako Shinozaki

Eiji Hosono

Kenta Tsubouchi

大学院新領域創
Development of new method to produce solar grade silicon
成科学研究科

Miho Itoi
Keiichiro Urabe

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

大学院新領域創 Development of spectroscopic diagnostic methods for pulsed
laser ablation plasma in supercritical carbon-dioxide
成科学研究科

医学部

Akira Yoko

大学院新領域創成科学研究科〃

Junichiro Otomo

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

Junichiro Otomo

大学院新領域創 Study on ionic transport in ceramics composites for newenergy conversion devices
成科学研究科〃

Junichiro Otomo

大学院新領域創 Reduction mechanism of metal oxide supported by oxide ion
conductor
成科学研究科〃

Junichiro Otomo

大学院新領域創 Development of continuous synthesis of organic-modified
particles in high temperature and pressure water
成科学研究科〃

Junichiro Otomo

大学院新領域創 Diffusion mechanism at interface between electrode andelectrolyte in solid oxide fuel cells
成科学研究科〃

Otomo Junichiro

Name

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

Title

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

東京大学

東京大学

日本大学

東京大学

東京大学

東京大学

東京大学

東京大学

東京大学

東京大学

東京大学

東京大学

東京大学

東京大学

東京大学

所属

The University of
Tokyo

National Institute ofAdvanced Industrial
Science and Technology

The University ofTokyo

The University ofTokyo

Nihon 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

The University ofTokyo

The University ofTokyo

The University ofTokyo

Organization

120

ISSP Activity Report 2013

ハーフメタル型ホイスラー合金の磁性と輸送特性に関する研究

〃

59

60

高際 良樹
北原 功一
柳原 大輔
星野 建

〃

〃

〃

69

70

71

木村 薫

岩崎 純也

長谷川 正

志村 元

長谷川 正

佐野 紘晃

〃

クラスター固体の熱電物性に関する研究〃

新規遷移金属硫化物固溶体の磁気物性〃

新規ぺロブスカイト型酸化物の磁気物性

〃

廣井 政彦

西迫 裕也

68

67

66

65

64

63

62

ホイスラー型化合物の磁性と伝導の研究

加藤 智嗣

〃

58

61

シュタウス
スヴェン

超臨界二酸化炭素中パルスレーザープラズマによる新規炭素ナノ材料の合成法の確立

57

重田 出

永嶌 真理子齋藤 哲治

氏名

天然鉱物の微細組織と結晶性の実態

新規磁石材料の微細構造解析

課題名

56

55

No.

東京大学

東京大学

東京大学

東京大学

東京大学

名古屋大学

名古屋大学

名古屋大学

名古屋大学

鹿児島大学

鹿児島大学

鹿児島大学

鹿児島大学

東京大学

東京大学

山口大学

千葉工業大学Name

The University ofTokyo

Hiroaki Sano

大学院理工学研
究科

Gen Shimura

大学院工学研究
科

Junya Iwasaki

大学院工学研究科

Yoshiki Takagiwa

〃
〃
〃
〃

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

Takeru Hoshino

Daisuke Yanagihara

Kouichi Kitahara

Kaoru Kimura

大学院新領域創Thermoelectric properties of cluster compounds
成科学研究科〃

Masashi Hasegawa

大学院工学研究
Magnetism of novel transition metal sulfide solid solutions科〃

Masashi Hasegawa

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

Hiroi Masahiko

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

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

The University ofTokyo

Nagoya University

Nagoya University

Nagoya University

Nagoya University

Kagoshima University

Kagoshima University

Kagoshima University

Yuya Nishisako

大学院理工学研
究科〃

Kagoshima University

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

Satoshi Kato

大学院新領域創成科学研究科〃The University ofTokyo

Yamaguchi University

Chiba Institute ofTechnology

Organization

大学院新領域創 Development of synthesis method of carbon nanomaterials by
Sven Stausspulsed-laser plasmas in supercritical CO2
成科学研究科Mariko Nagashima

Microstructural studies of newly developed permanent magnet
Tetsuji Saito
materials

Title

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

工学部

所属

ISSP Activity Report 2013

121

クラスター固体の熱電物性に関する研究

課題名
佐藤 直大

氏名
東京大学

山本 貴士
木内 久雄
木村 豊

課題名

トポロジカル絶縁体 Cu0.17Bi2Se3 の極紫外レー
ザー時間分解光電子分光

窒素ドープ炭素材料の酸素還元反応メカニズムの解明

超流動ヘリウム 3-A 相の半整数量子渦の研究

No.

1

2

3

氏名

南川 晴紀

〃

9

長期留学研究員（Long Term Young Researcher）

井口 雄介

〃

小野瀬 佳文

異常マイクロ波応答の観測に向けた空間反転対
称性が破れた磁性体の X 線試料評価

78東京理科大学廣戸 孝信

Au 基正 20 面体近似結晶の磁気構造の解明

6大阪市立大学

東京大学

東京理科大学

東京大学

東京大学

東京大学

大阪大学

横浜国立大学Si 基ナノ複合熱電材料の TEM による微細組織評
宮崎 吉宣
価

金 俊燮

〃

4

横浜国立大学横浜国立大学

茨城大学

5

李 東海

〃

3

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

2

鵜殿 治彦

氏名

シリサイド系半導体単結晶の光学特性評価

課題名

1

No.

Title

Characterizations of optical properties single crystalline
semiconducting silicides〃〃

Yoshinobu Miyazaki

Kim Junseop

Lee donghae

Mahoto Takeda

Haruhiko Udono

Name

Naoki Sato

Name

Hisao Kiuchi
Yutaka Kimura

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

Takashi Yamamoto

Name

Haruki Namikawa

Yusuke Iguchi

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

大学院理学研究
Time resolved ARPES of topological insulator Cu0.17Bi2Se3
科

Title

〃

大学院総合文化研究科

所属〃

大学院総合文化研究科

大学院総合文化 X-ray characterization of noncentrosymmetic magnetic
Yoshinori Onose
samples for the observation of anomalous microwave response
研究科

大学院基礎工学 Magnetic structure of Au based icosahedral approximant to the
Takanobu Hiroto
quasicrystal
研究科

大学院工学研究 Microstructural characterization of Si-based nanocomposite
thermoelectric materials by TEM
科

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

工学部

所属
Title

大学院新領域創Thermoelectric properties of cluster compounds
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）

72

No.

Osaka City University

The University of
Tokyo

Tokyo University of
ScienceOrganization

The University ofTokyo

The University ofTokyo

The University of
Tokyo

Tokyo University of
Science

Osaka University

Yokohama National
University

Yokohama National
University

Yokohama National
University

Ibaraki University

Organization

The University ofTokyo

Organization

122

ISSP Activity Report 2013

課題名

京都大学

熱輸送測定を用いたスピン液体の研究

2

渡邊 大樹

京都大学

氏名

カゴメ格子反強磁性体 volborthite における極低渡邊 大樹
温熱励起の研究

課題名

氏名

1

No.

短期留学研究員（Short Term Young Researcher）

No.

Daiki Watanabe

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

Name

Name

Daiki Watanabe

Title

Title

大学院理学研究 Study of thermal excitations of kagome lattice material
vorborthite in very low temperature
科

所属

所属

Kyoto University

Kyoto University

Organization

Organization

ISSP Activity Report 2013123

Publications
Division of New Materials Science
Takigawa group
We have been performing nuclear magnetic resonance experiments on various quantum spin systems and strongly correlated
electron systems to explore novel quantum phases with exotic ordering and fluctuation phenomena. The major achievements
7in the year 2013 include: (1) Investigation by Li-NMR of the magnetic phase transition in the frustrated antiferromagnets
LiInCr4O8 and LiGaCr4O8 with the novel breathing pyrochlore structure, (2) Microscopic examination of the quantum criticaland non-fermi liquid behavior in the valence fluctuating Yb compound alpha- and beta- YbAlB4, (3) Continued investigation of
the magnetic and structural transition in single crystals of volborthite with the distorted Kagome lattice aimed at the full understanding of the phase diagram in magnetic field.
1.

†

2.

*

3.

*

4.

Iterative deconvolution of quadrupole split NMR spectra: F. Mila and M. Takigawa, Eur. Phys. J. B 86 (2013) 354(1-4).

5.

†*

Anisotropic spin fluctuations in the quasi one-dimensional frustrated magnet LiCuVO4: K. Nawa, M. Takigawa, M.
Yoshida and K. Yoshimura, J. Phys. Soc. Jpn. 86 (2013) 094709(1-13).
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).
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).

Field-induced incommensurate phase in the strong-rung spin ladder with ferromagnetic legs: H. Yamaguchi, H.
Miyagai, M. Yoshida, M. Takigawa, K. Iwase, T. Ono, N. Kase, K. Araki, S. Kittaka, T. Sakakibara, T. Shimokawa, T.
Okubo, K. Okunishi, A. Matsuo and Y. Hosokoshi, Phys. Rev. B 89 (2014) 220402.

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
2013. (1) Field and temperature variations of the specific heat C(H,T) of the iron pnictide superconductor KFe2As2 (Tc=3.4K) were examined at temperatures down to 100 mK. Thermodynamic evidence for the presence of line nodes is obtained fromthe square-root H dependence of C/T in the low-T and low-H regime. Under a magnetic field rotated within the tetragonal abplane, a fourfold oscillation is observed in Ce and its sign changes at 0.08 Tc. The results indicate that line nodes exist on the
superconducting gap where the Fermi velocity is parallel to [100] directions. (2) We measured the temperature dependence ofthe magnetization M(T) of a S=1/2 one dimensional Heisenberg antiferromagnet CuPzN (interaction parameter J~10 K) near thesaturation field Hs~14 T where a quantum phase transition from a Luttinger liquid ground state to a fully polarized state occurs.
It is found that M(T) at Hs exhibits a square-root T dependence below ~1 K down to 80 mK, in good agreement with a prediction of the exact solutions.
1.

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).

2.

†

3.

*

4.

†*

124

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).
Evidence of a High-Field Phase in PrV2Al20 in a [100] Magnetic Field: Y. Shimura, Y. Ohta, T. Sakakibara, A. Sakaiand S. Nakatsuji, J. Phys. Soc. Jpn. 82 (2013) 043705(1-4).
High-Field Phase Diagram of SmRu4P12 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).

ISSP Activity Report 2013

5.

Verification of Anisotropic s-Wave Superconducting Gap Structure in CeRu2 from Low-Temperature Field-AngleResolved Specific Heat Measurements: S. Kittaka, T. Sakakibara, M. Hedo, Y. Onuki and K. Machida, J. Phys. Soc. Jpn.
82 (2013) 123706(1-4).

6.

†*

7.

†*

8.

†*

9.

Determining the Surface-To-Bulk Progression in the Normal-State Electronic Structure of Sr2RuO4 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).

Long-range order and spin-liquid states of polycrystalline Tb2+xTi2−xO7+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).
Quasi-one-dimensional S=1/2 Heisenberg antiferromagnetic chain consisting of the organic radical p-Br-V: K. Iwase,
H. Yamaguchi, T. Ono, Y. Hosokoshi, T. Shimokawa, Y. Kono, S. Kittaka, T. Sakakibara, A. Matsuo and K. Kindo, Phys.
Rev. B 88 (2013) 184431(1-5).
Various regimes of quantum behavior in an S=1/2 Heisenberg antiferromagnetic chain with fourfold periodicity: H.
Yamaguchi, T. Okubo, K. Iwase, T. Ono, Y. Kono, S. Kittaka, T. Sakakibara, A. Matsuo, K. Kindo and Y. Hosokoshi,
Phys. Rev. B 88 (2013) 174410(1-5).

†

10. 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).
11. 高次多極子がもたらす磁場誘起相 : 志村 恭通 , 榊原 俊郎 , 大貫 惇睦 , 固体物理 48 (2013) 721-727.
12. Magnetization steps in Yb2Pt2Pb with the Shastry-Sutherland lattice: Y. Shimura, T. Sakakibara, K. Iwakawa, Y. Onuki
and K. Sugiyama, J. Kor. Phys. Soc. 63 (2013) 551-554.
13. Singlet-triplet crossover in the two-dimensional dimer spin system YbAl3C3: S. Kittaka, T. Sugiyama, Y. Shimura, T.
Sakakibara, S. Matsuda and A. Ochiai, J. Kor. Phys. Soc. 62 (2013) 2088-2092.
†

14. Fine-Tuning of Magnetic Interactions in Organic Spin Ladders: H. Yamaguchi, H. Miyagai, T. Shimokawa, K. Iwase, T.
Ono, Y. Kono, N. Kase, K. Araki, S. Kittaka, T. Sakakibara, T. Kawakami, K. Okunishi and Y. Hosokoshi, J. Phys. Soc.
Jpn. 83 (2014) 033707(1-4).
15. Novel Electronic States of Heavy Fermion Compound YbCo2Zn20: F. Honda, Y. Taga, Y. Hirose, S. Yoshiuchi, Y.
Tomooka, M. Ohya, J. Sakaguchi, T. Takeuchi, R. Settai, Y. Shimura, T. Sakakibara, I. Sheikin, T. Tanaka, Y. Kubo and
Y. Onuki, J. Phys. Soc. Jpn. 83 (2014) 044703(1-9).
†

16. Possible Evolution of Antiferromagnetism in Zn-Doped Heavy-Fermion Superconductor CeCoIn5: M. Yokoyama, K.
Fujimura, S. Ishikawa, M. Kimura, T. Hasegawa, I. Kawasaki, K. Tenya, Y. Kono and T. Sakakibara, J. Phys. Soc. Jpn.
83 (2014) 033706(1-5).
17. Thermodynamic Study of Nodal Structure and Multiband Superconductivity of KFe2As2: S. Kittaka, Y. Aoki, N. Kase,
T. Sakakibara, T. Saito, H. Fukazawa, Y. Kohori, K. Kihou, C. Ho Lee, A. Iyo, H. Eisaki, K. Deguchi, N. K. Sato, Y.
Tsutsumi and K. Machida, J. Phys. Soc. Jpn. 83 (2014) 013704(1-4).
18.

†*

Field-induced incommensurate phase in the strong-rung spin ladder with ferromagnetic legs: H. Yamaguchi, H.
Miyagai, M. Yoshida, M. Takigawa, K. Iwase, T. Ono, N. Kase, K. Araki, S. Kittaka, T. Sakakibara, T. Shimokawa, T.
Okubo, K. Okunishi, A. Matsuo and Y. Hosokoshi, Phys. Rev. B 89 (2014) 220402.

19. Measurement of the spin-orbit coupling in superconducting Sr2RuO4 using polarized light and spin-resolved photoemission spectroscopy: Evidence for a breakdown in the singlets and triplets pairing mechanisms: C. N. Veenstra, Z. -H.
Zhu, M. Raichle, B. M. Ludbrook, A. Nicolaou, B. Slomski, G. Landolt, S. Kittaka, Y. Maeno, J. H. Dil, I. S. Elfimov,
M. W. Haverkort and A. Damascelli, Phys. Rev. Lett. 112 (2014) 127002(1-4).
20. Multiband superconductivity with unexpected deficiency of nodal quasiparticles in CeCu2Si2: S. Kittaka, Y. Aoki,
Y. Shimura, T. Sakakibara, S. Seiro, C. Geibel, F. Steglich, H. Ikeda and K. Machida, Phys. Rev. Lett. 112 (2014)
067002(1-5).
*

21. Magnetization and Specific Heat of the Caged Compound PrV2Al20: K. Araki, Y. Shimura, N. Kase, T. Sakakibara, A.
Sakai and S. Nakatsuji, J. Phys. Soc. Jpn. (2014), in print.

ISSP Activity Report 2013125

Mori group
We have successfully developed and characterized the functional molecular materials. The major achievements in 2013 are(1) to discover the novel spin liquid state of purely organic single-component crystal κ-H3(Cat-EDT-TTF)2, (2) to develop
the proton-electron coupled molecular conductor with tuning π-electron bandwidth and hydrogen bond, and (3) to clarify theelectronic state between 3/4-filled and effective 1/2-filled band structure by optical measurement for pressure-induced superconductor β-( meso-DMBEDT-TTF)2PF6.
1.

Optical Conductivity Measurement of a Dimer Mott-Insulator to Charge-Order Phase Transition in a Two-Dimensional
Quarter-Filled Organic Salt Compound: R. Okazaki, Y. Ikemoto, T. Moriwaki, T. Shikama, K. Takahashi, H. Mori, H.
Nakaya, T. Sasaki, Y. Yasui and I. Terasaki, Phys. Rev. Lett. 111 (2013) 217801.

2.

†

3.

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.

4.

Crystal Architectures and Magnetic Properties of Alkylferrocenium Salts with FnTCNQ(n = 0, 2, 4): Effect of Substituents on the Self-Assembled Structures: T. Mochida, T. Akasaka, Y. Funasako, Y. Nishio and H. Mori, Crystal Growth &Design 13 (2013) 4460.

5.

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, Nat. Commun.
4 (2013) 1344-1349.

6.

Gapless Quantum Spin Liquid in an Organic Spin-1/2 Triangular-Lattice κ-H3(Cat-EDT-TTF)2: T. Isono, H. Kamo, A.
Ueda, K. Takahashi, M. Kimata, H. Tajima, S. Tsuchiya, T. Terashima, S. Uji and H. Mori, Phys. Rev. Lett. 112 (2014)
177201.

7.

Biferrocenium salts with magnetite-like mixed-valence iron: coexistence of Fe
E. Nagabuchi, M. Takahashi and H. Mori, Chem. Commun. 50 (2014) 2481.

8.

Protonation of Pyridyl-Substituted TTF Derivatives: Substituent Effects in Solution and in the Proton-Electron Correlated Charge-Transfer Complexes: S. C. Lee, A. Ueda, A. Nakao, R. Kumai, H. Nakao, Y. Murakami and H. Mori,
Chem. Eur. J. 20 (2014) 1909.

9.

Charge-Transfer Salts of Biferrocene Derivatives with F2- and F4-Tetracyanoquinodimethane: Correlation Between
Donor–Acceptor Ratios and Cation Valence States: T. Mochida, Y. Funasako, E. Nagabuchi and H. Mori, Crystal
Growth & Design 14 (2014) 1459.

Fabrication of a field effect transistor structure using charge-ordered organic materials α-(BEDT-TTF)2I3 andα′-(BEDT-TTF)2IBr2: M. Kimata, T. Ishihara, A. Ueda, H. Mori and H. Tajima, Synth. Met. 173 (2013) 43-45.

3+

2.5+

and Fein the crystal: T. Mochida,

10. Synergistic Spin Transition between Spin Crossover and Spin-Peierls-like Singlet Formation in the Halogen-Bonded
Molecular Hybrid System: [Fe(Iqsal)2][Ni(dmit)2]⋅CH3CN⋅H2O: K. Fukuroi, K. Takahashi, T. Mochida, T. Sakurai, H.
Ohta, T. Yamamoto, Y. Einaga and H. Mori, Angew. Chem. Int. Ed. 53 (2014) 1983.
11. 単成分純有機金属材料で金属伝導は可能か？ : 森 初果 , 上田 顕 , 化学 68 (2013) 64-65.
12. 磁性と伝導性が相関した多重機能性分子性物質の開発 : 森 初果 , 高橋 一志 , まぐね 8 (2013) 148-154.
13. はたらくこと 生きること理工系女性の想い : 森 初果 , 日刊工業新聞 (2013).
14. 化学の力を生かした新しい分子性機能材料の開発 : 森 初果 , 化学 69, No1 (2014) 20-21.
15. 金属状態を示す純有機単成分導体 : 森 初果 , 工業材料 62 No1 (2014) 26-27.

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 2013. (1) We have found that the metallic spin ice compound Pr2Ir2O7 exhibits
quantum criticality in a nontrivial semimetallic state. (2) The Fe doping at the Al site in α-YbAlB4 induces an antiferromagnetic
ordering whose ordering temperature goes up to 10 K, which is the highest among the Yb based heavy fermion materials. The
large enhancement of the magnetic ordering indicates that the mixed valence plays an important role. (3) Finally, our successin synthesizing high quality single crystals of PrTr2Al20 allows us to reveal that the superconductivity in PrTi2Al20 and theantiferro-quadrupolar transition in PrV2Al20 can be easily suppressed by disorder. This highlights the importance of high quality
crystals for the study of strong hybridization effects in quadrupolar Kondo systems.

126

ISSP Activity Report 2013

1.

Conduction electron spin resonance in AlB2: L. M. Holanda, L. Mendonça-Ferreira, R. A. Ribeiro, J. M. Osorio-Guillén,
G. M. Dalpian, K. Kuga, S. Nakatsuji, Z. Fisk, R. R. Urbano, P. G. Pagliuso and C. Rettori, J. Phys.: Condens. Matter 25(2013) 216001.

2.

*

3.

Determination of long-range all-in-all-out ordering of Ir moments in a pyrochlore iridate Eu2Ir2O7 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).

4.

Magnetic excitations and c-f hybridization effect in PrTi2Al20and PrV2Al20: Y. Tokunaga, H. Sakai, S. Kambe, A. Sakai,
S. Nakatsuji and H. Harima, Phys. Rev. B 88 (2013) 085124.

5.

Dynamical spin–orbital correlation in the frustrated magnet Ba3CuSb2O9: Y. Ishiguro, K. Kimura, S. Nakatsuji, S.
Tsutsui, A. Q. R. Baron, T. Kimura and Y. Wakabayashi, Nat. Commun. 4 (2013) 2022(1-6).

6.

Quantum fluctuations in spin-ice-like Pr2Zr2O7: K. Kimura, S. Nakatsuji, J.-J. Wen, C. Broholm, M. B. Stone, E. Nishibori and H. Sawa, Nat. Commun. 4 (2013) 1934(1-6).

7.

*

8.

Low temperature transport properties of the quadrupolar Kondo lattice system PrTi2Al20: A. Sakai and S. Nakatsuji, J.
Kor. Phys. Soc. 63 (2013) 398-400.

9.

Magnetic order induced by Fe doping in the intermediate valence system β-YbAlB4: K. Kuga and S. Nakatsuji, J. Kor.
Phys. Soc. 63 (2013) 549-550.

Evidence of a High-Field Phase in PrV2Al20 in a [100] Magnetic Field: Y. Shimura, Y. Ohta, T. Sakakibara, A. Sakaiand S. Nakatsuji, J. Phys. Soc. Jpn. 82 (2013) 043705(1-4).
4+

Chemical effects of high-resolution Yb Lγ 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 Spectrom. 42 (2013)450-455.

10. Mössbauer spectroscopy of Fe-doped valence-fluctuating α-YbAlB4: Y. Sakaguchi, S. Ikeda, H. Kobayashi, K. Kuga, K.
Sone and S. Nakatsuji, J. Kor. Phys. Soc. 62 (2013) 2146-2149.
11. Single-crystal study on the low-temperature magnetism of the pyrochlore magnet Pr2Zr2O7: K. Kimura, S. Nakatsuji
and A. A. Nugroho, J. Kor. Phys. Soc. 63 (2013) 719-721.
*

12. Synchrotron X-ray spectroscopy study on the valence state in α- and β-YbAlB4 at low temperatures and high magnetic
fields: Y. H. Matsuda, T. Nakamura, K. Kuga, S. Nakatsuji, S. Michimura, T. Inami, N. Kawamura and M. Mizumaki, J.
Kor. Phys. Soc. 62 (2013) 1778-1781.
13. Quantum criticality in a metallic spin liquid: Y. Tokiwa, J. J. Ishikawa, S. Nakatsuji and P. Gegenwart, Nature Mater. 13(2014) 356.
14. X-ray Photoemission and X-ray Absorption Spectroscopy of Hexagonal Ba3CuSb2O9: T. Sugimoto, T. Mizokawa, H.
Wadati, K. Takubo, A. Damascelli, T. Z. Regier, G. A. Sawatzky, N. Katayama, H. Sawa, K. Kimura and S. Nakatsuji, J.
Kor. Phys. Soc. 63 (2014) 549-550.
*

15. Heavy fermion superconductivity under pressure in the quadrupole system PrTi2Al20: K. Matsubayashi, T. Tanaka, J.
Suzuki, A. Sakai, S. Nakatsuji, K. Kitagawa, Y. Kubo and Y. Uwatoko, J. Phys. Soc. Jpn. (2014), in print.
16. Magnetic and Thermal Properties of the Single Crystalline Pr2Zr2O7 in a [111] field: K. Kimura and S. Nakatsuji, J.
Phys. Soc. Jpn. (2014), in print.
*

17. Magnetization and Specific Heat of the Caged Compound PrV2Al20: K. Araki, Y. Shimura, N. Kase, T. Sakakibara, A.
Sakai and S. Nakatsuji, J. Phys. Soc. Jpn. (2014), in print.
*

18. Magnetization of Yb-based mixed-valent compounds at megagauss fields: T. Terashima, Y. H. Matsuda, K. Kuga, Y.
Matsumoto and S. Nakatsuji, J. Phys. Soc. Jpn. (2014), in print.
19. Sample Dependence of the Quadrupolar Transition in the Nonmagnetic cubic Γ3 Compound PrV2Al20: M. Tsujimoto, A.
Sakai and S. Nakatsuji, J. Phys. Soc. Jpn. (2014), in print.
20. Structural and Magnetic Properties of α-Yb(Al1-xFex)B4 under Hydtostatic Pressure: Y. Sakaguchi, S. Ikeda, K. Kuga, S.
Nakatsuji, N. Hirao, Y. Ohishi and H. Kobayashi, J. Phys. Soc. Jpn. (2014), in print.
21. Superconducting properties of the ferroquadrupolar cubic Γ3 compound PrTi2Al20: A. Sakai, K. Kuga and S. Nakatsuji,
J. Phys. Soc. Jpn. (2014), in print.

ISSP Activity Report 2013127

22. Suppression of the Heavy Fermion State in Magnetic Fields in the Mixed Valent α-YbAlB4: Y. Matsumoto, K. Kentaro
and S. Nakatsuji, J. Phys. Soc. Jpn. (2014), in print.
23. Two magnetic phases in α-YbAl1-xFexB4: K. Kuga, S. Suzuki and S. Nakatsuji, J. Phys. Soc. Jpn. (2014), in print.
24. 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 majorachievements in the fiscal year 2013 are (1) finding of new superconductivity in anti-post-perovskite compounds, and (2) elucidation of orbital states of iridium oxides by means of resonant x-ray diffraction.
1.

*

2.

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).

3.

Magnetoelasticity in ACr2O4 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).

4.

*

5.

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).

6.

*

7.

†

8.

*

9.

†

Observation of Phonon-Assisted Magnon Absorption in Spin–Orbit Coupling Induced Mott Insulator Sr2IrO4: Y.
Hirata, H. Tajima and K. Ohgushi, J. Phys. Soc. Jpn. 82 (2013) 035002(1-2).

Mechanism of Enhanced Optical Second-Harmonic Generation in the Conducting Pyrochlore-Type Pb2Ir2O7-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).

Hydrostatic pressure (8GPa) dependence of electrical resistivity of BaCo2As2 single crystal: C. Ganguli, K. Matsubayashi, K. Ohgushi, Y. Uwatoko, M. Kanagaraj and S. Arumugam, Mat. Res. Bull. 48 (2013) 4329-4331.
Suppression of Intersite Charge Transfer in Charge-Disproportionated Perovskite YCu3Fe4O12: 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.
5d 遷移金属パイロクロア酸化物における低温磁気構造の研究 : 山浦 淳一 , 大串 研也 , 広井 善二 , 日本結晶学会誌 55 (2013) 116-120.
Control of Bond-Strain-Induced Electronic Phase Transitions in Iron Perovskites: I. Yamada, H. Etani, K. Tsuchida, S.
Marukawa, N. Hayashi, T. Kawakami, M. Mizumaki, K. Ohgushi, Y. Kusano, J. Kim, N. Tsuji, R. Takahashi, N. Nishiyama, T. Inoue, T. Irifune and M. Takano, Inorg. Chem. 52 (2013) 13751-13761.

. †

10

B-Site Deficiencies in A-site-Ordered Perovskite LaCu3Pt3.75O12: 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.

†

2+

11. Pd -Incorporated Perovskite CaPd3B4O12(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.
12. Superconductivity in anti-post-perovskite vanadium compounds: B. Wang and K. Ohgushi, Sci. Rep. 3 (2013) 3381.
†

13. NMR study of successive magnetic transitions in the A-site ordered perovskite LaMn3Cr4O12: Y. Kawasaki, S. Takase,Y. Kishimoto, T. Ohno, I. Yamada, K. Shiro, R. Takahashi, K. Ohgushi, N. Nishiyama, T. Inoue and T. Irifune, J. Kor.
Phys. Soc. 63 (2013) 640-643.
*

14. High-pressure effects in anti-post-perovskite superconductors V3PnNx (Pn = P, As): B. S. Wang, J. -G. Cheng, K.
Matsubayashi, Y. Uwatoko and K. Ohgushi, Phys. Rev. B 89 (2014) 144510 (1-4).
15. Magnetoelectric responses from the respective magnetic R and Fe subsystems in the noncentrosymmetric antiferromagnets RFe3(BO3)4 (R = Eu, Gd, and Tb): T. Kurumaji, K. Ohgushi and Y. Tokura, Phys. Rev. B 89 (2014) 195126 (1-13).

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ISSP Activity Report 2013

*

16. Pseudogap formation above the superconducting dome in iron pnictides: T. Shimojima, T. Sonobe, W. Malaeb, K.
Shinada, A. Chainani, S. Shin, T. Yoshida, S. Ideta, A. Fujimori, H. Kumigashira, K. Ono, Y. Nakashima, H. Anzai, M.
Arita, A. Ino, H. Namatame, M. Taniguchi, M. Nakajima, S. Uchida, Y. Tomioka, T. Ito, K. Kihou, C. H. Lee, A. Iyo,
H. Eisaki, K. Ohgushi, S. Kasahara, T. Terashima, H. Ikeda, T. Shibauchi, Y. Matsuda and K. Ishizaka, Phys. Rev. B 89
(2014) 045101(1-10).
17. CaIrO3: a Spin-Orbit Mott Insulator Beyond the jeff = 1/2 Ground State: M. Moretti Sala, K. Ohgushi, A. Al-Zein, Y.
Hirata, G. Monaco and M. Krisch, Phys. Rev. Lett. 112 (2014) 176402.
18. ポストペロブスカイト型化合物 CaIrO3 の磁気構造 : 大串 研也 , 大隅 寛幸 , 山浦 淳一 , 有馬 孝尚 , 日本結晶学会誌 56 (2014) 36.

Division of Condensed Matter Theory
K. Ueda group
When a simple lattice is depleted in a periodic manner, electronic states of a tight binding model on such a depleted lattice
sometimes shows a peculiar feature like a flat band or a Dirac cone. A typical example is the triangular lattice: the honeycomb
lattice is obtained by the one third depletion and the kagome lattice by the one quarter depletion. In 2013, we concentrated on
the quantum phase transitions of the Hubbard model on the one fifth depleted square lattice. This structure exists in nature in
CaV4O9 and in some iron pnictide compound. At quarter filling the Dirac cone at the gamma point coincides with the Fermi
energy and furthermore the Dirac cone touches with an almost flat band forming an SU(3) multiplet. We have shown thatquantum phase transitions around the symmetric point is controlled by the SU(3) Dirac electrons. At half filling the effective
theory in the strong coupling limit is a Heisenberg model which shows quantum phase transitions from the dimer singlet to theantiferromagnetic phase and further onto the plaquette singlet phase. Quantum phase transitions of the Hubbard model on thislattice have been investigated by using the cluster dynamical mean field theory.
1.

SU(3) Dirac Electrons in the 1/5-Depleted Square-Lattice Hubbard Model at 1/4-Filling: Y. Yamashita, M. Tomura, Y.
Yanagi and K. Ueda, Phys. Rev. B 88 (2013) 195104(1-7).

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) In order to better reproduce the electron-density profile obtained by the diffusion
Monte Carlo method for the system of a single atom embedded in the electron gas with arbitrary densities, we have improved on
the GGA-PBE version of the exchange-correlation energy functional in the density functional theory. In making this improvement, we have paid special attention to fulfilling the cusp theorem at the atom site. The improved functional will be applied to awide range of topics in the future, including the phase diagram of the solid hydrogen under high pressures. (2) A further analysis
is made for an electron-like elementally excitation (pseudoelectron) in the Luttinger liquid in competition with the spinon
and holon excitations by using the powerful self-consistent numerical GWΓ scheme. (3) Mechanisms of superconductivity
are considered in the low-density system in the framework of the kp perturbation theory with application to the n-type doped
SrTiO3. We have considered the effects of various issues such as the ferroelectric soft-phonon exchange, the plasmon contribution, the band multiplicity and the spin-orbit interaction.
1.

第１原理からの超伝導理論 : 高田 康民 , 物性研究 電子版 Vol.3, No.1 (2013) 031203(1-29).

2.

Structural evolution of the one-dimensional spectral function from the low- to the high-energy limit: H. Maebashi and Y.
Takada, Phys. Rev. B 89 (2014) 201109(R) (1-5).

3.

Theory for Reliable First-Principles Prediction of the Superconducting Transition Temperature: Y. Takada, in: Carbonbased New Superconductors: Toward high-Tc superconductivity (ISBN 978-981-4303-30-9 (Hardcover), 978-981-430331-6 (eBook)), Ch 8, edited by J. Haruyama, (Pan Stanford Publishing Pte. Ltd., 2014), 38page.

Oshikawa group
We studied a wide range of fundamental problems in condensed matter theory and statistical mechanics. In particular, we investigated the effects of quantum particle statistics on the ground-state energy. In the case of free particles, a ground state of bosons
is given by a Bose-Einstein Condensation of all the particles into the lowest-energy single-particle state. In contrast, the ground

ISSP Activity Report 2013129

state of fermions is given by putting the particles to lowest-energy single-particle state, but with the restriction that no more than
one particle can occupy an identical state (Pauli exclusion principle). Thus the ground-state energy for the identical Hamiltonian
would be higher in the case of fermions, compared to the case of bosons. However, the comparison becomes not trivial when
the particles are interacting. In fact, we established several examples in which the hard-core bosons have a higher ground-stateenergy than the corresponding fermions. We have also provided a novel understanding how the particle statistics affects theground-state energy: Fermi statistics introduces a sort of frustration among hoppings of many particles. When there is no otherfrustration among hoppings, we proved that the bosons have a lower ground-state energy than the corresponding fermions, evenin the presence of interactions. On the other hand, when frustration is introduced through phases of hopping amplitudes, theeffects may partially cancel with each other, resulting in a reversal of the ground-state energy.
1.

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2.

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3.

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8.

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Dimensional crossover in layered f-electron superlattices: Y. Tada, R. Peters and M. Oshikawa, Phys. Rev. B 88 (2013)
235121 (1-7).
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).
Entanglement spectra between coupled Tomonaga-Luttinger liquids: Applications to ladder systems and topologicalphases: R. Lundgren, Y. Fuji, S. Furukawa and M. Oshikawa, Phys. Rev. B 88 (2013) 245137 (1-14).
Hole statistics and superfluid phases in quantum dimer models: C. A. Lamas, A. Ralko, M. Oshikawa, D. Poilblanc and
P. Pujol, Phys. Rev. B 87 (2013) 104512(1-20).
Response to a twist in systems with Zp symmetry: The two-dimensional p-state clock model: Y. Kumano, K.
Hukushima, Y. Tomita and M. Oshikawa, Phys. Rev. B 88 (2013) 104427 (1-6).
Ground-State Energies of Spinless Free Fermions and Hard-Core Bosons: W. Nie, H. Katsura and M. Oshikawa, Phys.
Rev. Lett. 111 (2013) 100402 (1-5).
Quantum criticality in an asymmetric three-leg spin tube: A strong rung-coupling perspective: Y. Fuji, S. Nishimoto, H.
Nakada and M. Oshikawa, Phys. Rev. B 89 (2014) 054425 (1-13).
Valence bond distribution and correlation in bipartite Heisenberg antiferromagnets: D. Schwandt, F. Alet and M.
Oshikawa, Phys. Rev. B 89 (2014) 104416 (1-14).

Tsunetsugu group
We have investigated novel phases of non-Kramers doublets realized in the heavy fermion compound PrIr2Zn20 and related
2materials. Non-Kramers doublet is a ground state of f electron configuration protected by cubic symmetry of the crystalline
field. Based on a microscopic model and an effective field theory, we have used symmetry arguments and mean-field approachto study possible symmetry breaking at low temperatures with and without magnetic field. We have found various antiferro
quadrupole ordered phases depending on the magnetic field direction. The most important ingredient is the presence of a unique
Z3 anisotropy in the order parameter space, and in particular, the zero-field order corresponds to the spontaneous breaking of Z3
× Z2 symmetry. This also results in unusual divergence of quadrupole susceptibility in several channels near the critical point.
This may be related to observed singularity in ultrasound measurements. We have also numerically studied doublon dynamics
near the Mott metal-insulator transition. It has been long believed that the Mott transition is a binding-unbinding transition of
doublons and holons, but this point has been directly examined only by equal-time correlations. We have performed large-scalecomputations of cluster dynamical mean-field theory for the half-filled Hubbard model on the triangular lattice, and calculated
dynamical correlations of doublons and holons on the same site and also between nearest-neighbor sites. The results show
drastic changes in their dynamics between the metallic and insulating phases. In particular, the doublon-holon pair correlation shows fluctuations up to a very long time in the metallic phase, while the correlation decays very quickly in the insulatingphase. This supports the binding-unbinding transition picture of the Mott transition. (Reference: Toshihiro Sato and Hirokazu
Tsunetsugu, arXiv:1404.6598) Quantum impurities coupled to Tomonaga-Luttinger liquids are interesting physical systems
including an impurity in quantum wire, a spin coupled to a two-dimensional topological insulator etc. We have developed a new
method of quantum Monte Carlo simulation with continuous time formulation. This is base on the duality between electrons andbosons, and this results in the advantage of negative sign free nature. The new method is applied to various problems and scaling
properties of correlation functions are examined. (Reference: K. Hattori and A. Rosch, arXiv: 1405.3300)
1.

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).

2.

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).

3.

p-wave superconductivity near a transverse saturation field: K. Hattori and H. Tsunetsugu, Phys. Rev. B 87 (2013)064501 (5 pages).

130

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4.

Antiferro Quadrupole Orders in Non-Kramers Doublet Systems: K. Hattori and H. Tsunetsugu, J. Phys. Soc. Jpn. 83(2014) 034709 (19 pages).

Kohmoto group
Energy versus magnetic field (Hofstadter butterfly diagram) in twisted bilayer graphene is studied theoretically. If we take theusual Landau gauge, we cannot take a finite periodicity even when the magnetic flux through a supercell is a rational number.
We show that the periodic Landau gauge, which has the periodicity in one direction, makes it possible to obtain the Hofstadterbutterfly diagram. Since a supercell can be large, magnetic flux through a supercell normalized by the flux quantum can be afractional number with a small denominator, even when a magnetic field is not extremely strong. As a result, quantized Hall
conductance can be a solution of the Diophantine equation which cannot be obtained by the approximation of the linearizedenergy dispersion near the Dirac points.
1.

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2.

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Periodic Landau gauge and quantum Hall effect in twisted bilayer graphene: Y. Hasegawa and M. Kohmoto, Phys. Rev.
B 88 (2013) 125426(1-8).
The Spectral Shift Function and the Friedel Sum Rule: M. Kohmoto, T. Koma and S. Nakamura, Ann. Henri Poincaré
14 (2013) 1413-1424.

Sugino group
We have advanced the first-principles molecular dynamics approach to the electrochemical interfaces. This was done by
improving the effective screening medium (ESM) method. With the method, new results was obtained regarding the planar andparticle catalysts and the mechanism of the reactions. We have continued to develop a many-body Green's function approachto the spectroscopy and began to obtain promising results. Progress has been made on the tensor network approach to obtainaccurate density matrix of molecules.
1.

Improved modeling of electrified interfaces using the effective screening medium method: I. Hamada, O. Sugino, N.
Bonnet and M. Otani, Phys. Rev. B 88 (2013) 155427.

2.

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).

3.

Reply to “Comment on ‘Nonadiabatic couplings from the Kohn-Sham derivative matrix: Formulation by time-dependent density-functional theory and evaluation in the pseudopotential framework’”: C. Hu, O. Sugino, H. Hirai and Y.
Tateyama, Phys. Rev. A 88 (2013) 056502.

4.

First-Principles Investigation on Structural and Optical Properties of M @C60 (Where M = H, Li, Na, and K): Y.
Noguchi, O. Sugino, H. Okada and Y. Matsuo, J. Phys. Chem. C 117 (2013) 15362.

5.

白金電極上における水素発生反応の第一原理的理解に向けて : I. Hamada and O. Sugino, J. Surf. Sci. Soc. Jpn. 34(2013) 638.

6.

Microscopic understanding of the electrochemical interfaces: O. Sugino, AIP Conf. Proc. 1568 (2013) 43.

7.

Electronic structures of oxygen-deficient Ta2O5: Y. Yang, H.-H. Nahm, O. Sugino and T. Ohno, AIP Advances 3 (2013)
042101(1-8).

8.

Effect of thermal motion on catalytic activity of nanoparticles in polar solvent: N. Bonnet, O. Sugino and M. Otani, J.
Chem. Phys. 140 (2014) 044703.

9.

Performance of Tamm-Dancoff approximation on nonadiabatic couplings by time-dependent density functional theory:
C. Hu, O. Sugino and K. Watanabe, J. Chem. Phys. 140 (2014) 054106.

+

10. First-principles thermodynamic description of hydrogen electroadsorption on the Pt(111) surface: T. T. T. Hanh, Y.
Takimoto and O. Sugino, Surf. Sci. 625 (2014) 104.

Kato group
The main research subject in our laboratory is theory of nonequilibrium properties in nanoscale devices. We have performed (1)evaluation of coherence in single-photon and single-electron generation quantum, (2) exact calculation of transport properties in
the Anderson impurity at high bias voltages, and (3) Kondo-like phenomena in heat transport through a local two-state system.

ISSP Activity Report 2013

131

1.

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).

2.

Relaxor Behavior and Morphotropic Phase Boundary in a Simple Model: Y. Tomita and T. Kato, J. Phys. Soc. Jpn. 82(2013) 063002(1-5).

3.

Exact interacting Green's function for the Anderson impurity at high bias voltages: A. Oguri and R. Sakano, Phys. Rev.
B 88 (2013) 155424(1-12).

4.

*

5.

Kondo Signature in Heat Transfer via a Local Two-State System: K. Saito and T. Kato, Phys. Rev. Lett. 111 (2013)
214301(1-5).

6.

1/(N − 1) expansion approach to full-counting statistics for the SU(N) Anderson model: A. Oguri and R. Sakano, J. Kor.
Phys. Soc. 63 (2013) 423-427.

7.

Dephasing in single-electron generation due to environmental noise probed by Hong-Ou-Mandel interferometry: E.
Iyoda, T. Kato, K. Koshino and T. Martin, Phys. Rev. B 89 (2014) 205318(1-8).

8.

メゾスコピック系の物理―基礎から最近の話題まで―（第 58 回物性若手夏の学校 : 講義）: 加藤 岳生 , 物性研究・
電子版 3 (2014) 031201(1-26).

Experimental Verification of Comparability between Spin-Orbit and Spin-Diffusion Lengths: Y. Niimi, D. Wei, H.
Idzuchi, T. Wakamura, T. Kato and Y. Otani, Phys. Rev. Lett. 110 (2013) 016805.

Division of Nanoscale ScienceIye group
Thermoelectric effect and high frequency conduction in GaAs/AlGaAs 2DEG subjected to periodic potential modulation (lateralsuperlattice) has been investigated. Commensurability oscillation in thermoelectric power is observed in one-dimensional lateralsuperlattice sample. AC conductivity in the quantum Hall plateau region of a hexagonal lateral superlattice sample exhibits a
few characteristic resonance peaks.
1.

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2.

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3.

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4.

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).

5.

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).

6.

*

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) 381.
Suppression of Andreev current due to transverse current flow in an InAs two-dimensional electrons: Y. Takahashi, Y.
Hashimoto, Y. Iye and S. Katsumoto, J. Cryst. Growth 378 (2013) 400.
Spin Hall reduction of Josephson effect in InAs two-dimensional electrons: T. Nakamura, Y. Takahashi, Y. Hashimoto,D. H. Yun, S. W. Kim, Y. Iye and S. Katsumoto, Phys. Status Solidi C 10 (2013) 1473.

Mechanical modification of magnetic anisotropy in (Ga,Mn)As: Y. Hashimoto, Y. Iye and S. Katsumoto, in: AIP
Conference Proceedings "International Conference on Physics of Semiconductors", edited by T. Ihn (AIP, 2013), 347.

Katsumoto group
The two-electron tunneling process to a side-coupled quantum dot has been applied to detect spin polarization in the target
device. The method is most powerful among so far developed and the device voltage dependence can be measured. We haverevealed that the polarization mechanism at so called 0.5 plateau is the Stern-Gelach type spin-filter while that at 1.0 plateau isthe spin rotation predicted a decade ago.
1.

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).

2.

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132

Adiabatic measurements of magneto-caloric effects in pulsed high magnetic fields up to 55 T: T. Kihara, Y. Kohama,
Y. Hashimoto, S. Katsumoto and M. Tokunaga, Rev. Sci. Instrum. 84 (2013) 074901(1-7).

ISSP Activity Report 2013

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7.

Effect of transverse current on Andreev bound state: Y. Takahashi, Y. Hashimoto, D. H. Yun, S. W. Kim, T. Nakamura,Y. Iye and S. Katsumoto, in: AIP Conference Proceedings, "International Conference on Physics of Semiconductors",edited by T. Ihn (AIP, 2013), 345.

8.

*

9.

量子の匠 : 勝本 信吾 , ( 丸善 , 東京 , 2014).

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) 381.
Suppression of Andreev current due to transverse current flow in an InAs two-dimensional electrons: Y. Takahashi, Y.
Hashimoto, Y. Iye and S. Katsumoto, J. Cryst. Growth 378 (2013) 400.
Spin Hall reduction of Josephson effect in InAs two-dimensional electrons: T. Nakamura, Y. Takahashi, Y. Hashimoto,D. H. Yun, S. W. Kim, Y. Iye and S. Katsumoto, Phys. Status Solidi C 10 (2013) 1473.
Heat-pulse measurements of specific heat in 36 ms pulsed magnetic fields: Y. Kohama, Y. Hashimoto, S. Katsumoto,
M. Tokunaga and K. Kindo, Meas. Sci. Technol. 24 (2013) 115005(1-9).

Mechanical modification of magnetic anisotropy in (Ga,Mn)As: Y. Hashimoto, Y. Iye and S. Katsumoto, in: AIP
Conference Proceedings "International Conference on Physics of Semiconductors", edited by T. Ihn (AIP, 2013), 347.

Otani group
We have studied on three topics including spin Hall effect, spin diffusion length, and magnonic crystals. Firstly we have applied
our non-local spin injection technique to 5d iridium oxide, and succeeded in detecting a very large inverse spin Hall resistivity
at room temperature which guarantees this material as a good spin current detector. Secondly we experimentally confirmed thatweak antilocalization measurements can be employed as a complementary method for determining the spin diffusion lengths
of noble metals. Thirdly in collaboration with Indian group lead by Prof. Barman in Bose Center Kolkata, we have performed
all-optical time-resolved magneto-optical Kerr microscope measurements and found that the anisotropic propagation of spinwaves are tunable by arranging different symmetries in the form of artificial ferromagnetic nanodot lattices. The observations
are important for further development in magnonic crystal based devices.
1.

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2.

Configurational anisotropic spin waves in cross-shaped Ni80Fe20 nanoelements: B. K. Mahato, B. Rana, R. Mandal, D.
Kumar, S. Barman, Y. Fukuma, Y. Otani and A. Barman, Appl. Phys. Lett. 102 (2013) 192402.

3.

Impact of interface properties on spin accumulation in dual-injection lateral spin valves: H. Idzuchi, S. Karube, Y.
Fukuma, T. Aoki and Y. Otani, Appl. Phys. Lett. 103 (2013) 162403.

4.

Spin injection properties in trilayer graphene lateral spin valves: Y. P. Liu, H. Idzuchi, Y. Fukuma, O. Rousseau, Y. Otani
and W. S. Lew, Appl. Phys. Lett. 102 (2013) 033105.

5.

Tunable Magnonic Spectra in Two-Dimensional Magnonic Crystals with Variable Lattice Symmetry: S. Saha, R.
Mandal, S. Barman, D. Kumar, B. Rana, Y. Fukuma, S. Sugimoto, Y. Otani and A. Barman, Adv. Funct. Mater. 23(2013) 2378.

6.

5d iridium oxide as a material for spin-current detection: K. Fujiwara, Y. Fukuma, J. Matsuno, H. Idzuchi, Y. Niimi, Y.
Otani and H. Takagi, Nat. Commun. 4 (2013) 3893.

7.

Propagation of nonlinearly generated harmonic spin waves in microscopic stripes: O. Rousseau, M. Yamada, K. Miura,
S. Ogawa and Y. Otani, J. Appl. Phys. 115 (2014) 053914.

8.

Effect of anisotropic spin absorption on the Hanle effect in lateral spin valves: H. Idzuchi, Y. Fukuma, S. Takahashi, S.
Maekawa and Y. Otani, Phys. Rev. B 89 (2014) 081308(R).

9.

Extrinsic spin Hall effects measured with lateral spin valve structures: Y. Niimi, H. Suzuki, Y. Kawanishi, Y. Omori, T.
Valet, A. Fert and Y. Otani, Phys. Rev. B 89 (2014) 054401.

Experimental Verification of Comparability between Spin-Orbit and Spin-Diffusion Lengths: Y. Niimi, D. Wei, H.
Idzuchi, T. Wakamura, T. Kato and Y. Otani, Phys. Rev. Lett. 110 (2013) 016805.

10. Spin Injection into a Superconductor with Strong Spin-Orbit Coupling: T. Wakamura, N. Hasegawa, K. Ohnishi, Y.
Niimi and Y. Otani, Phys. Rev. Lett. 112 (2014) 036602.

ISSP Activity Report 2013133

Komori group
Electronic structures of Pt-induced nanowires on the Ge(001) surface were studied by ARPES. Two one-dimensional (1D)
metallic surface bands are clearly identified at temperatures much lower than its structural transition temperature. This 1D
system exhibits neither Peierls instability nor Luttinger liquid behaviors. The elastic-scattering vectors within the topological surface state (TSS) of a topological insulator Bi1.5Sb0.5Te1.7Se1.3 were studied using quasiparticle interference patterns
measured by STM. The results are compared by the surface band obtained using time-resolved ARPES. The scattering in the
TSS is effectively prohibited in a wide angular range of 100-180°.
——
1. Selective doping in a surface band and atomic structures of the Ge(111) (√ 3 × √ 3 ) R30º–Au surface: K. Nakatsuji, Y.
Motomura, R. Niikura and F. Komori, J. Phys.: Condens. Matter 25 (2013) 045007 (9).
2.

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).

3.

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4.

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5.

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.

6.

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Fermi gas behavior of a one-dimensional metallic band of Pt-induced nanowires on Ge(001): K. Yaji, I. Mochizuki, S.
Kim, Y. Takeichi, A. Harasawa, Y. Ohtsubo, P. Le Fevre, F. Bertran, A. Taleb-Ibrahimi, A. Kakizaki and F. Komori, Phys.
Rev. B 87 (2013) 241413R (5).
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 (1-4).

Systematic study of surface magnetism in Si(111)-Fe system grown by solid phase epitaxy: In situ schematic magnetic
phase diagram of Si(111)-Fe: A. N. Hattori, K. Hattori, K. Kataoka, E. Takematsu, A. Ishii, F. Komori and H. Daimon, J.
Magn. Magn. Mater. 363 (2014) 158-165.
Robust Protection from Backscattering in the Topological Insulator Bi1.5Sb0.5Te1.7Se1.3: S. Kim, S. Yoshizawa, Y.
Ishida, K. Eto, K. Segawa, Y. Ando, S. Shin and F. Komori, Phys. Rev. Lett. 112 (2014) 136802(1-5).
Observing hot carrier distribution in an n-type epitaxial graphene on a SiC substrate: T. Someya, H. Fukidome,
Y. Ishida, R. Yoshida, T. Iimori, R. Yukawa, K. Akikubo, Sh. Yamamoto, S. Yamamoto, T. Yamamoto, T. Kanai, K.
Funakubo, M. Suemitsu, J. Itatani, F. Komori, S. Shin and I. Matsuda, Appl. Phys. Lett. 104 (2014) 161103(1-4).
Scanning tunneling microscopic and spectroscopic studies on a crystalline silica monolayer epitaxially formedon hexagonal SiC(000-1) surfaces: H. Tochihara, T. Shirasawa, T. Suzuki, T. Miyamachi, T. Kajiwara, K. Yagyu, S.
Yoshizawa, T. Takahashi, S. Tanaka and F. Komori, Appl. Phys. Lett. 104 (2014) 051601(1-4).

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), 334-345.

Yoshinobu group
We conducted several research projects in the fiscal year 2013. (1) The adsorption and activation of CO2 on Cu(997) studied
by SR-PES and IRAS. (2) The adsorption and decomposition of formic acid on Cu(111) studied by SR-PES and IRAS. (3)Spectroscopic characterization and transport properties of the Si(111) native oxide surface with tetrafluorotetracyanoquinodimethane. (4) Electronic structure of alufa-sexithiophene ultra thin films grown on passivated Si(001) surfaces.
1.

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).

2.

巻頭言「君たちは何のために研究するのか？」: 吉信 淳 , 表面科学 34 (2013) 403.

3.

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.

4.

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.

5.

Quantitative analysis of chemical interaction and doping of the Si(111) native oxide surface with tetrafluorotetracyanoquinodimethane: S. Yoshimoto, M. Furuhashi, T. Koitaya, Y. Shiozawa, K. Fujimaki, Y. Harada, K. Mukai and J. Yoshinobu, J. Appl. Phys. 115 (2014) 143709.

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7.

Aqueous-Phase Oxidation of Epitaxial Graphene on the Silicon Face of SiC(0001): Md. Zakir Hossain, M. B. A. Razak,
S. Yoshimoto, K. Mukai, T. Koitaya, J. Yoshinobu, H. Sone, S. Hosaka and M. C. Hersam, J. Phys. Chem. C 118 (2014)
1014.

8.

Structure and Photo-Induced Charge Transfer of Pyridine Molecules Adsorbed on TiO2(110): A NEXAFS and CoreHole-Clock Study: H. Kondoh, Y. Higashi, M. Yoshida, Y. Monya, R. Toyoshima, K. Mase, K. Amemiya, F. Tsukioka,
M. Nagasaka, Y. Iwasawa, H. Orita, K. Mukai and J. Yoshinobu, Electrochemistry 82 (2014) 341.

9.

Interface state and energy level alignment of F4-TCNQ sandwiched between a pentacene film and the ethyleneterminated Si(100) surface: S. Yoshimoto, K. Kameshima, T. Koitaya, Y. Harada, K. Mukai and J. Yoshinobu, Organic
Electronics 15 (2014) 356.

Electronic structure of α-sexithiophene ultrathin films grown on passivated Si(001) surfaces: K. Hiraga, H. Toyoshima,
H. Tanaka, K. Inoue, S. Ohno, K. Mukai, J. Yoshinobu and M. Tanaka, Appl. Surf. Sci. 307 (2014) 520.

10. 淡青評論「東京大学憲章を読んでみませんか」: 吉信 淳 , 学内広報 1450 (2014) 12.
11. 「現代ケイ素化学 - 体系的な基礎概念と応用に向けて」のうち第 24 章「ケイ素単結晶表面の修飾」（p.377-p.388）．:
吉良 満夫 , 玉尾皓平 ( 編集 ), 吉信淳（部分執筆）, ( 化学同人 , 京都市 , 2013).
12. 絶対微小 日常生活を量子論で理解する : マイケ ル・D・フェイヤー著 , 丑田 公規 , 吉信淳 訳 , ( 化学同人 ,Kyoto, 2013).
13. 「水素の事典」のうち 5 章 1-a（p.86-p.89）を分担執筆．: 水素エ ネルギー協会編 , ( 朝倉書店 , 東京 , 2014).

Hasegawa group
We studied the superconducting proximity effect in real space by using low-temperature scanning tunneling microscopy andspectroscopy aiming at the observation of peculiar superconducting states, such as Fulde–Ferrell–Larkin–Ovchinnikov (FFLO)
states and odd-frequency superconductivity. So far, we observed the spatial distribution of superconductivity around an interface between Pb islands and a two-dimensional (2D) diffusive normal metal, and found that the surface steps in the 2D normal
metal working as a potential barrier exhibit a significant role on the proximity effect; through the real-space mapping of superconductivity in nano-meter spatial resolution, we observed the steps blocking the propagation of the proximity and enhancing it
in confined area between the steps and the super/normal interface. The enhancement is explained with reflectionless tunneling,
quantum interference phenomenon between the incident electrons and retro-reflected holes formed by the Andreev reflection at
the interface. On a 2D surface superconductor, which can be formed by depositing 1 monolayer In or Pb on Si(111) substrate,
we also observed Josephson vortices at the step edges, indicating weakened superconductivity there.
1.

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.

2.

†

Microscopic origin of the π states in epitaxial silicene: A. Fleurence, Y. Yoshida, C. -C. Lee, T. Ozaki, Y. YamadaTakamura and Y. Hasegawa, Appl. Phys. Lett. 104 (2014) 021605 (4 pages).

Lippmaa group
High-temperature growth studies of magnetite Fe3O4 showed that it is possible to fabricate self-organized arrays of strainfree and uniformly oriented nanoscale pyramids. We hope to use such nanopyramid arrays for studying the multiferroic
coupling in magnetite. Nanoscale composite materials based on a ferromagnetic spinel, CoFe2O4 and a ferroelectric perovskite,
Bi5Ti3FeO15 were characterized in collaboration with our joint-use partners. Saturation magnetism and spin dilution was studied
in Pr0.8Ca0.2MnO3 to develop a suitably weak ferromagnet for use in superconductor - ferromagnet tunnel junctions. Workproceeded on the development of light-element oxide films with the mapping of the growth mechanisms of BeO.
1.

Nonmagnetic Sc Substitution in a Perovskite Ferromagnetic Insulator Pr0.8Ca0.2MnO3: T. Harada, R. Takahashi and M.
Lippmaa, J. Phys. Soc. Jpn. 82 (2013) 014801(1-5).

2.

Spectroscopic studies on the electronic and magnetic states of Co-doped perovskite manganite Pr0.8Ca0.2Mn1−yCoyO3
thin films: K. Yoshimatsu, H. Wadati, E. Sakai, T. Harada, Y. Takahashi, T. Harano, G. Shibata, K. Ishigami, T. Kadono,
T. Koide, T. Sugiyama, E. Ikenaga, H. Kumigashira, M. Lippmaa, M. Oshima and A. Fujimori, Phys. Rev. B 88 (2013)
174423.

3.

Epitaxial Bi5Ti3FeO15–CoFe2O4 Pillar–Matrix Multiferroic Nanostructures: A. Imai, X. Cheng, H. L. Xin, E. A. Eliseev,
A. N. Morozovska, S. V. Kalinin, R. Takahashi, M. Lippmaa, Y. Matsumoto and V. Nagarajan, ACS Nano 7 (2013)11079-11086.

ISSP Activity Report 2013

135

4.

Pulsed laser deposition of epitaxial BeO thin films on sapphire and SrTiO3: T. Peltier, R. Takahashi and M. Lippmaa,
Appl. Phys. Lett. 104 (2014) 231608(1-4).

5.

Spontaneous Growth of Strain-Free Magnetite Nanocrystals via Temperature-Driven Dewetting: R. Takahashi, H.
Misumi, T. Yamamoto and M. Lippmaa, Crystal Growth & Design 14 (2014) 1264-1271.

6.

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 group
The present antiferromagnetic state TN=7.5 K of EuBi3 with the AuCu3-type cubic structure is found to be stable underpressures up to 8 GPa, where the Neel temperature increases with increasing pressure, being TN=16.5 K at 8 GPa. We havestudied the effect of pressure on the superconducting transition temperature of YFe4P12 and LaFe4P12 up to 8 GPa throughelectrical resistivity measurements in a cubic anvil apparatus. TSC of both compounds increase to 9.3 K and 8.0 K withincreasing pressure, but the slopes decreases gradually with increasing pressure, respectivily. In contrast, the TSC of YRu4P12
and LaRu4P12 monotonically decreases with pressure. The distinct pressure dependences of both TSC cannot be explained solely
from a structural point of view. The pressure dependence of the electrical resistivity of BaCo2As2 single crystal as a functionof temperature was measured up to 8 GPa. A hybrid-type piston-cylinder pressure cell for the electron spin resonance (ESR)
measurement has been developed that the pressure reaches 2.1 GPa. The cylinder of this pressure cell consists of a NiCrAl
inner cylinder and a CuBe outer sleeve, and all inner parts are made of zirconium oxide which has good transmittance to themillimeter and submillimeter waves. We have also developed a transmission-type high-field ESR system having two different
modulation methods for this pressure cell.
1.

†

2.

Change in Unusual Magnetic Properties by Rh Substitution in CeRu2Al10: R. Kobayashi, Y. Ogane, D. Hirai, T.
Nishioka, M. Matsumura, Y. Kawamura, K. Matsubayashi, Y. Uwatoko, H. Tanida and M. Sera, J. Phys. Soc. Jpn. 82(2013) 093702(1-5).

3.

†

4.

†

5.

Microscopic Evidence of a Crossover to a Low-Temperature Intermediate Valence State in YbCo2Zn20: T. Mito, H.
Hara, T. Ishida, K. Nakagawara, T. Koyama, K. Ueda, T. Kohara, K. Ishida, K. Matsubayashi, Y. Saiga and Y. Uwatoko,
J. Phys. Soc. Jpn. 82 (2013) 103704 (1-4).

6.

†

7.

†

8.

†

9.

Dielectric properties of single crystal spinels in the series FeV2O4, MnV2O4, and CoV2O4 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).

136

AC Susceptibility of the Dipolar Spin Ice Dy2Ti2O7: Experiments and Monte Carlo Simulations: H. Takatsu, K. Goto,
H. Otsuka, R. Higashinaka, K. Matsubayashi, Y. Uwaoko and H. Kadowaki, J. Phys. Soc. Jpn. 82 (2013) 104710(1-5).

Fermi Surface and Magnetic Properties of Antiferromagnet EuBi3: A. Nakamura, Y. Hiranaka, M. Hedo, T. Nakama, Y.
Tatetsu, T. Maehira, Y. Miura, A. Mori, H. Tsutsumi, Y. Hirose, K. Mitamura, K. Sugiyama, M. Hagiwara, F. Honda, T.
Takeuchi, Y. Haga, K. Matsubayashi, Y. Uwatoko and Y. Onuki, J. Phys. Soc. Jpn. 82 (2013) 124708(1-6).

Magnetic and Fermi Surface Properties of EuGa4: A. Nakamura, Y. Hiranaka, M. Hedo, T. Nakama, Y. Miura, H.
Tsutsumi, A. Mori, K. Ishida, K. Mitamura, Y. Hirose, K. Sugiyama, F. Homda, R. Settai, T. Takeuchi, M. Hagiwara,
T. D. Matsuda, E. Yamamoto, Y. Haga, K. Matsubayashi, Y. Uwatoko, H. Harima and Y. Onuki, J. Phys. Soc. Jpn. 82(2013) 104703 (1-10).

Pressure and Substitution Effects on Transport and Magnetic Properties of Y1-xRxCo2 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).
Two-Dimensional Monopole Dynamics in the Dipolar Spin Ice Dy2Ti2O7: H. Takatau, K. Goto, H. Otsuka, R. Higashinaka, K. Matsubayashi, Y. Uwatoko and H. Kadowaki, J. Phys. Soc. Jpn. 82 (2013) 073707(1-5).
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.

ISSP Activity Report 2013

10. High-pressure synthesis of the BaIrO3 perovskite: A Pauli paramagnetic metal with a Fermi liquid ground state: J. G.
Cheng, T. Ishii, H. Kojitani, K. Matsubayashi, A. Matsuo, X. Li, Y. Shirako, J. S. Zhou, J. B. Goodenough, C. Q. Jin, M.
Akaogi and Y. Uwatoko, Phys. Rev. B 88 (2013) 205114(1-7).
11. Pressure dependence of the superconducting transition temperature of the filled skutterudite YFe4P12: J. G. Cheng, J.
S. Jhou, K. Matsubayashi, P. P. Kong, Y. Kubo, Y. Kawamura, C. Sekine, C. Q. Jin, J. B. Goodenough and Y. Uwatoko,
Phys. Rev. B 88 (2013) 024514(1-8).
†

12. Development of a Low-Temperature Insert for Precise Magnetization Measurement below T = 2 K with a Superconducting Quantum Interference Device Magnetometer: Y. Sato, S. Makiyama, Y. Sakamoto, T. Hasuo, Y. Inagaki, T.
Fujiwara, H. S. Suzuki, K. Matsubayashi, Y. Uwatoko and T. Kawae, Jpn. J. Appl. Phys. 52 (2013) 106702 (1-6).
13. Possible Kondo Physics near a Metal-Insulator Crossover in the A-Site Ordered Perovskite CaCu3Ir4O12: J. G. Cheng,
J. S. Zhou, Y. F. Yang, H. D. Zhou, K. Matsubayashi, Y. Uwatoko, A. MacDonald and J. B. Goodnough, Phys. Rev. Lett.
111 (2013) 176403(1-5).
14.

†*High Field Magnetization of TbPd2Ge2 Single Crystal: T. Shigeoka, T. Hasegawa, T. Fujiwara, A. Kondo, K. Kindo
and Y. Uwatoko, J. Low Temp. Phys. 170 (2013) 248-254.

†

15. Magnetic penetration depth and flux-flow resistivity measurements on NaFe0.97Co0.03As single crystals: T. Okada, H.
Takahashi, Y. Imai, K. Kitagawa, K. Matsubayashi, Y. Uwatoko and A. Maeda, Physica C 494 (2013) 109-112.
*

16. Hydrostatic pressure (8GPa) dependence of electrical resistivity of BaCo2As2 single crystal: C. Ganguli, K. Matsubayashi, K. Ohgushi, Y. Uwatoko, M. Kanagaraj and S. Arumugam, Mat. Res. Bull. 48 (2013) 4329-4331.
†

17. Magnetic and Structural Properties of Mn1.8Co0.2Sb under High Magnetic Fields: H. Orihashi, M. Hiroi, Y. Mitsui, K.
Takahashi, K. Watanabe, K. Matsubayashi, Y. Uwatoko and K. Koyama, Mater. Trans. 54 (2013) 969-973.
†

18. 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, Physica C: Superconductivity 484 (2013) 27.
†

19. Development of Hybrid-Type Pressure Cell for High-Pressure and High-Field ESR Measurement: K. Fujimoto, T.
Sakurai, S. Okubo, H. Ohta, K. Matsubayashi, Y. Uwatoko and Y. Koike, Applied Magnetic Resonance 44 (2013)893-898.
†

20. Magnetic properties of Mn2Sb1-xGex(0.05 ≤ｘ≤0.2) in high magnetic fields: D. Shimada, H. Orihashi, D. Mitsunaga, M.
Ito, M. Hiroi, K. Koyama, R. Onodera, K. Takahashi, K. Matsubayashi and Y. Uwatoko, J. Kor. Phys. Soc. 63 (2013)743-746.
†

21. Phase diagram and transport properties of Y1−xNdxCo2 pseudo-binary alloys: A. T. Burkov, M. Takeda, A. Teruya, S.
Watanabe, S. Hirakawa, Y. Hiranaka, A. Nakamura, M. Hedo, T. Nakama, K. Yagasaki, Y. Takaesu, K. Uchima and Y.
Uwatoko, J. Kor. Phys. Soc. 62 (2013) 2080-2083.
†

22. Successive magnetic transitions of PrRh2 single crystals: Y. Okawara, J. W. Cui, T. Fujiwara, T. Shigeoka, K. Matsubayashi, Y. Uwatoko, S. Kimura and K. Watanabe, J. Kor. Phys. Soc. 63 (2013) 743-746.
23. Pressure Effect on the Structure and Superconducting Transition Temperature of Filled Skutterudites LaT4P12 (T=Fe,
Ru): Y. Kawamura, T. Kawaai, J. Hayashi, C. Sekine, H. Gotou, J. Cheng, K. Matsubayashi and Y. Uwatoko, J. Phys.
Soc. jpn. 82 (2013) 114702(1-4).
†

24. Development of High-Field ESR System Using SQUID Magnetometer and its Application to Measurement under High
Pressure: T. Sakurai, K. Fujimoto, S. Okubo, H. Ohata and Y. Uwatoko, Journal of Magnetics 18 (2013) 168-172.
*

25. High-pressure effects in anti-post-perovskite superconductors V3PnNx (Pn = P, As): B. S. Wang, J. -G. Cheng, K.
Matsubayashi, Y. Uwatoko and K. Ohgushi, Phys. Rev. B 89 (2014) 144510 (1-4).
26. Long-range antiferromagnetic order in the frustrated XY pyrochlore antiferromagnet Er2Ge2O7: X. Li, W. M. Li, K.
Matsubayashi, Y. Sato, C. Q. Jin, Y. Uwatoko, T. Kawae, A. M. Hallas, C. R. Wiebe, A. M. Arevalo-Lopez, J. P. Attfield,
J. S. Gardner, R. S. Freitas, H. D. Zhou and J. -G. Cheng, Phys. Rev. B 89 (2014) 064409 (1-7).
†

27. Magnetic Field Effect on Magnetic and Electrical Properties ofMn2-xCuxSb: Y. Matsumoto, H. Orihashi, K. Matsubayashi, Y. Uwatoko, M. Hiroi and K. Koyama, IEEE Transactions on Magnetics 50 (2014) 1000704(1-4).
*

28. Heavy fermion superconductivity under pressure in the quadrupole system PrTi2Al20: K. Matsubayashi, T. Tanaka, J.
Suzuki, A. Sakai, S. Nakatsuji, K. Kitagawa, Y. Kubo and Y. Uwatoko, J. Phys. Soc. Jpn. (2014), in print.

ISSP Activity Report 2013137

Osada group
In an organic Dirac fermion system α-(BEDT-TTF)2I3, the ν=0 quantum Hall state is realized under magnetic fields resulting
from the breaking of four-fold (spin and valley) degeneracy of the singular n=0 Landau level.. The recent NMR measurement
has suggested the possible transition from the quantum Hall ferromagnetic (QHF) phase to the quantum Hall insulator (QHI)
phase around 15 T. To check this possibility, we have performed high-field transport measurement up to 31T using the NHMFL
at Tallahassee, USA. The interlayer resistance shows the saturating behavior up to high fields, which reflects the surface transport via helical edge state of the QHF phase. We can see no anomaly in the saturating region, especially around 15T. This resultmeans that the QHF state survives up to 31T with no QHF-QHI transition.

1.

Angle-Dependent Magnetoresistance Oscillations and Charge Density Wave in the Organic Conductor α-(BEDTTTF)2KHg(SCN)4: K. Uchida, R. Yamaguchi, T. Konoike, T. Osada and W. Kang, J. Phys. Soc. Jpn. 82 (2013)
043714(1-4).

2.

Anomalous Thermoelectric Transport and Giant Nernst Effect in Multilayered Massless Dirac Fermion System: T.
Konoike, M. Sato, K. Uchida and T. Osada, J. Phys. Soc. Jpn. 82 (2013) 073601(1-4).

3.

†

4.

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.

5.

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.

6.

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.

7.

有機ディラック電子系における量子ホール状態 : 田嶋 尚也 , 佐藤 光幸 , 鴻池 貴子 , 長田 俊人 , 固体物理 49(2014) 229-240.

Stereoscopic study of the angle-dependent magnetoresistance oscillations across the charge-density-wave transitionof the organic conductor α-(BEDT-TTF)2KHg(SCN)4: W. Kang, T. Osada, T. Konoike and K. Uchida, Phys. Rev. B 88
(2013) 195105(1-9).

Yamashita group
As the first year of Yamashita group, we developed a new probe for thermal-Hall measurement which can be used in VTI systemwith 16 T magnet. With this probe, we successfully started the study of thermal-transport measurement of a kagom&eacute;material, Volborthite, to find if there is a thermal-Hall effect due to spinons. Developments of the measurement systems forstudies under ultra-low temperatures, on the other hand, did not work out due to malfunctions of dilution refrigerators inheritedfrom Ishimoto and Tajima groups.

Materials Design and Characterization Laboratory
Hiroi group
Spinodal decomposition is a ubiquitous phenomenon leading to phase separation from a uniform solution. We show that aspinodal decomposition occurs in a unique combination of two rutile compounds of TiO2 and VO2, which are chemically andphysically distinguished from each other: TiO2 is a wide-gap insulator with photo catalytic activities and VO2 is assumed to bea strongly correlated electron system which exhibits a dramatic metal-insulator transition at 342 K. The spinodal decomposition
takes place below 830 K at a critical composition of 34 mol% Ti, generates a unidirectional composition modulation along thec axis with a wavelength of approximately 6 nm, and finally results in the formation of self-assembled lamella structures madeup of Ti-rich and V-rich layers stacked alternately with 30-50 nm wavelengths. A metal-insulator transition is not observed inquenched solid solutions with intermediate compositions but emerges in the thin V-rich layers as the result of phase separation.
Interestingly, the metal-insulator transition remains as sharp as in pure VO2 even in such thin layers and takes place at significantly reduced temperatures of 310-340 K, which is probably due to a large misfit strain induced by lattice matching at thecoherent interface.
1.

*

2.

Magnetic Properties of the Spin-1/2 Deformed Kagome Antiferromagnet Edwardsite: H. Ishikawa, Y. Okamoto and Z.
Hiroi, J. Phys. Soc. Jpn. 82 (2013) 063710.

138

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).

ISSP Activity Report 2013

3.

Pressure Effects on Rattling and Superconductivity in the Einstein Solids: Y. Ikeda, Y. Kawasaki, T. Shinohara, S. Araki,
T. C. Kobayashi, A. Onosaka, Y. Okamoto, J.-I. Yamaura and Z. Hiroi, J. Phys. Soc. Jpn. 82 (2013) 063707.

4.

Understanding of the Temperature–Pressure Phase Diagram of β-Pyrochlore Oxides: A Role of Anhamonicity on Superconductivity: T. Isono, D. Iguchi, T. Matsubara, Y. Machida, B. Salce, J. Flouquet, H. Ogusu, J.-I. Yamaura, Z. Hiroi andK. Izawa, J. Phys. Soc. Jpn. 82 (2013) 114708.

5.

YCr6Ge6 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).

6.

Breathing Pyrochlore Lattice Realized in A-Site Ordered Spinel Oxides LiGaCr4O8 and LiInCr4O8: Y. Okamoto, G. J.
Nilsen, J. Paul Attfield and Z. Hiroi, Phys. Rev. Lett. 110 (2013) 097203(1-5).

7.

*

8.

*

9.

†*

10.

†*

5d 遷移金属パイロクロア酸化物における低温磁気構造の研究 : 山浦 淳一 , 大串 研也 , 広井 善二 , 日本結晶学会誌 55 (2013) 116-120.
Spinodal Decomposition in the TiO2–VO2 System: Z. Hiroi, H. Hayamizu, T. Yoshida, Y. Muraoka, Y. Okamoto, J.-I.
Yamaura and Y. Ueda, Chem. Mater. 25 (2013) 2202.
Iseite, Mn2Mo3O8, 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.
Synthesis of LiNi0.5Mn1.5O4 and 0.5Li2MnO3–0.5LiNi1/3Co1/3Mn1/3O2 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.

*

11. Electronic State of CeFe4As12 Investigated by Using Single Crystals Grown under High Pressure of 4 GPa: Y. Ogawa,
H. Sato, M. Watanabe, T. Namiki, S. Tatsuoka, R. Higashinaka, Y. Aoki, K. Kuwahara, J.-I. Yamaura and Z. Hiroi, J.
Phys. Soc. Jpn. 83 (2014) 034710.
*

12. Kagome–Triangular Lattice Antiferromagnet NaBa2Mn3F11: H. Ishikawa, T. Okubo, Y. Okamoto and Z. Hiroi, J. Phys.
Soc. Jpn. 83 (2014) 043703(1-5).

Kawashima group
We have been investigating quantum spin/boson systems and frustrated systems by means of large-scale numerical simulation. We also develop new numerical techniques. Our group's achievements of 2013 include: (1) clarifying the apparent deconfined critical behavior of the SU(N) J-Q Heisenberg model with a strong corrections to scaling, (2) lattice rotational symmetry
breaking in flustrated spin systems, and (3) highly parallelized code for the molecular dynamics simulation of mixed-phase fluid
dynamics.
1.

Mott Transition of Bose–Fermi Mixtures in Optical Lattices Induced by Attractive Interactions: A. Masaki and H. Mori,
J. Phys. Soc. Jpn. 82 (2013) 074002(1-4).

2.

*

3.

Second-order phase transition in the Heisenberg model on a triangular lattice with competing interactions: R. Tamura, S.
Tanaka and N. Kawashima, Phys. Rev. B 87 (2013) 214401(1-5).

4.

†*

5.

Visibility pattern of Bose–Fermi mixtures in one-dimensional incommensurate lattices: A. Masaki and H. Mori, Philosophical Magazine Letters 93 (2013) 422(9pages).

6.

Fermion-induced decoherence of bosons in optical lattices: A. Masaki and H. Mori, J. Phys.: Conf. Ser. 454 (2013)
012048(1-4).

7.

Huge-scale molecular dynamics simulation of multibubble nuclei: H. Watanabe, M. Suzuki and N. Ito, Computer
Physics Communications 184 (2013) 2775(8pages).

8.

*

Possibility of deconfined criticality in SU(N) Heisenberg models at small N: K. Harada, T. Suzuki, T. Okubo, H.
Matsuo, J. Lou, H. Watanabe, S. Todo and N. Kawashima, Phys. Rev. B 88 (2013) 220408(1-4).

Various regimes of quantum behavior in an S=1/2 Heisenberg antiferromagnetic chain with fourfold periodicity: H.
Yamaguchi, T. Okubo, K. Iwase, T. Ono, Y. Kono, S. Kittaka, T. Sakakibara, A. Matsuo, K. Kindo and Y. Hosokoshi,
Phys. Rev. B 88 (2013) 174410(1-5).

Kagome–Triangular Lattice Antiferromagnet NaBa2Mn3F11: H. Ishikawa, T. Okubo, Y. Okamoto and Z. Hiroi, J. Phys.
Soc. Jpn. 83 (2014) 043703(1-5).

ISSP Activity Report 2013

139

9.

Parallelized Quantum Monte Carlo Algorithm with Nonlocal Worm Updates: A. Masaki-Kato, T. Suzuki, K. Harada, S.
Todo and N. Kawashima, Phys. Rev. Lett. 112 (2014) 140603(1-5).

10. Phase Transitions with Discrete Symmetry Breaking in Antiferromagnetic Heisenberg Models on a Triangular Lattice:
R. Tamura, S. Tanaka and N. Kawashima, JPS Conf. Proc. --- Proceedings of the 12th Asia Pacific Physics Conference(APPC12) 1 (2014) 012125(1-5).

Noguchi group
We have studied the structure formation of surfactant membranes under shear flow. We found that shear can induce a rolledlamellae structure, which structure factor agrees with those of intermediate states during lamellar-to-onion transition measured
by time-resolved scatting experiments. We revealed that entropy reduction of membrane fluctuations can induce aggregation ofbinding proteins in multilamellar membranes. We also studied the effects of anchored polymers on membranes and dynamics ofdeformable active particles.
1.

Dynamics of a deformable active particle under shear flow: M. Tarama, A. M. Menzel, B. T. Hagen, R. Wittkowski, T.
Ohta and H. Loewen, J. Chem. Phys. 139 (2013) 104906.

2.

Spatiotemporal heterogeneity of local free volumes in highly supercooled liquid: H. Shiba and T. Kawasaki, J. Chem.
Phys. 139 (2013) 184502.

3.

Structure formation in binary mixtures of lipids and detergents: Self-assembly and vesicle division: H. Noguchi, J.
Chem. Phys. 138 (2013) 024907(1-9).

4.

Structure formation of surfactant membranes under shear flow: H. Shiba, H. Noguchi and G. Gompper, J. Chem. Phys.
139 (2013) 014702.

5.

Oscillatory motions of an active deformable particle: M. Tarama and T. Ohta, Phys. Rev. E 87 (2013) 062912.

6.

Mechanical properties and microdomain separation of fluid membranes with anchored polymers: H. Wu, H. Shiba and
H. Noguchi, Soft Matter 9 (2013) 9907.

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. Entropy-driven aggregation in multilamellar membranes: H. Noguchi, EPL 102 (2013) 68001.
12. 粒子描像の流体力学計算手法 I: 野口 博司 , 分子シミュレーション研究会会誌 “アンサンブル ” 15 (2013) 265-268.
13. Morphological variation of a lipid vesicle confined in a spherical vesicle: A. Sakashita, M. Imai and H. Noguchi, Phys.
Rev. E 89 (2014) 040701.
14. Multiscale modeling of blood flow: from single cells to blood rheology: D. A. Fedosov, H. Noguchi and G. Gompper,
Biomech. Model. Mechanobiol. 13 (2014) 239-258.
15. 界面活性剤系の構造形成の粗視化分子シミュレーション : 芝隼 人 , 野口 博司 , 分子シミュレーション研究会会誌“アンサンブル ” 16 (2014) 59-65.
16. 粒子描像の流体力学計算手法 II: 野口 博司 , 分子シミュレーション研究会会誌 “アンサンブル ” 16(2) (2014)
118-121.

Materials Synthesis and Characterization group
1.

140

†*

Iseite, Mn2Mo3O8, 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.

ISSP Activity Report 2013

2.

†

3.

†*

4.

†

5.

†

6.

Minohlite, a new copper-zinc sulfate mineral from Minoh, Osaka, Japan: M. Ohnishi, N. Shimobayashi, D. NishioHamane, K. Shinoda, K. Momma and T. Ikeda, Mineral. Mag. 77 (2013) 335.

7.

†

8.

*

9.

†

Takanawaite-(Y), a new mineral of the M-type polymorph with Y(Ta,Nb)O4 from Takanawa Mountain, Ehime Prefecture, Japan: D. Nishio-Hamane, T. Minakawa and Y. Ohgoshi, Journal of Mineralogical and Petrological Sciences 108(2013) 335.
Synthesis of LiNi0.5Mn1.5O4 and 0.5Li2MnO3–0.5LiNi1/3Co1/3Mn1/3O2 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.
VGCF-core@LiMn0.4Fe0.6PO4-sheath heterostructure nanowire for high rate Li-ion batteries: K. Kagesawa, E. Hosono,
M. Okubo, J. Kikkawa, D. Nishio-Hamane, T. Kudo and H. Zhou, CrystEngComm 15 (2013) 6638.
3+

Spin transition and substitution of Fe in Al-bearing post-Mg-perovskite: K. Fujino, D. Nishio-Hamane, Y.
Kuwayama, N. Sata, S. Murakami, M. Whitaker, A. Shinozaki, H. Ohfuji, Y. Kojima, T. Irifune, N. Hiraoka, H. Ishii andK.-D. Tsuei, Physics of the Earth and Planetary Interiors 217 (2013) 31.

Vanadoallanite-(La): a new epidote-supergroup mineral from Ise, Mie Prefecture, Japan: M. Nagashima, D. NishioHamane, N. Tomita, T. Minakawa and S. Inaba, Mineral. Mag. 77 (2013) 2739.
Electronic State of CeFe4As12 Investigated by Using Single Crystals Grown under High Pressure of 4 GPa: Y. Ogawa,
H. Sato, M. Watanabe, T. Namiki, S. Tatsuoka, R. Higashinaka, Y. Aoki, K. Kuwahara, J.-I. Yamaura and Z. Hiroi, J.
Phys. Soc. Jpn. 83 (2014) 034710.
Magnetic properties of Mn–Bi melt-spun ribbons: T. Saito, R. Nishimura and D. Nishio-Hamane, J. Magn. Magn.
Mater. 349 (2014) 9.

†

10. Successive phase transitions driven by orbital ordering and electron transfer in quasi-two-dimensional CrSe2 with atriangular lattice: S. Kobayashi, H. Ueda, D. Nishio-Hamane, C. Michioka and K. Yoshimura, Phys. Rev. B 89 (2014)054413.
11. Iwateite, Na2BaMn(PO4)2, a new mineral from the Tanohata mine, Iwate Prefecture, Japan: D. Nishio-Hamane, T.
Minakawa and H. Okada, Journal of Mineralogical and Petrological Sciences 109 (2014) 34.
†

12. Magnetic properties of SmCo5−xFex (x=0–4) melt-spun ribbon: T. Saito and D. Nishio-Hamane, J. Alloys Compd. 585(2014) 423.
†

13. Electrochemical properties of LiMnxFe1−xPO4 (x = 0, 0.2, 0.4, 0.6, 0.8 and 1.0)/vapor grown carbon fiber core–sheath
composite nanowire synthesized by electrospinning method: K. Kagesawa, E. Hosono, M. Okubo, D. Nishio-Hamane,
T. Kudo and H. Zhou, Journal of Power Sources 248 (2014) 615.
†

14. Electrically Conductive and Mechanically Elastic Titanium Nitride Ceramic Microsprings: S. Yang, X. Chen, K.
Yamamoto, M. Iitake, D. Nishio-Hamane, H. Sakai and M. Abe, J. Nanosci. Nanotech. 14 (2014) 4292.
†

15. Ultrafast hydrothermal synthesis of Pr-doped Ca0.6Sr0.4TiO3 red phosphor nanoparticles using corrosion resistantmicrofluidic devices with Ti-lined structure under high-temperature and high-pressure condition: K. Sue, T. Ono, Y.
Hakuta, H. Takashima, D. Nishio-Hamane, T. Sato, M. Ohara, M. Aoki, Y. Takebayashi, S. Yoda, T. Hiaki and T. Furuya,
Chemical Engineering Journal 239 (2014) 360.

Neutron Science Laboratory
Shibayama group
Shibayama group has been exploring the structure and dynamics of soft matter, especially polymer gels, micelles, and phenolic
resin, utilizing a combination of small-angle neutron scattering (SANS), neutron spin echo (NSE), and dynamic light scattering(DLS). The objectives are to elucidate the mysterious relationship between the structure and variety of novel properties/functions of polymer gels/resins. The highlights of 2012 include (1) structural analysis of high performance ion-gel comprising
tetra-PEG networks, (2) atomistic molecular dynamics study of cross-linked phenolic resins, (3) rubber elasticity for incomplete
polymer networks, (4) kinetic study for AB-type coupling reaction of tetra-arm polymers, (5) optimization of the thickness ofa ZnS/(LiF)-Li-6 scintillator for a high-resolution detector installed on a focusing small-angle neutron scattering spectrometer(SANS-U), and so on.
1.

Self-oscillating micelles: T. Ueki, M. Shibayama and R. Yoshida, Chem. Commun. 49 (2013) 6947.

ISSP Activity Report 2013

141

2.

Gelation process of Tetra-PEG ion-gel investigated by time-resolved dynamic light scattering: H. Asai, K. Nishi, T.
Hiroi, K. Fujii, T. Sakai and M. Shibayama, Polymer 54 (2013) 1160.

3.

Communication: Collective dynamics of room-temperature ionic liquids and their Li ion solutions studied by highresolution inelastic X-ray scattering: K. Fujii, M. Shibayama, T. Yamaguchi, K. Yoshida, T. Yamaguchi, S. Seki, H.
Uchiyama, A. Q. R. Baron and Y. Umebayashi, J. Chem. Phys. 138 (2013) 151101.

4.

Correlation between Local and Global Inhomogeneities of Chemical Gels: M. Asai, T. Katashima, U.-I. Chung, T. Sakai
and M. Shibayama, Macromolecules 46 (2013) 9772.

5.

SANS and DLS Study of Tacticity Effects on Hydrophobicity and Phase Separation of Poly(N -isopropylacrylamide):
K. Nishi, T. Hiroi, K. Hashimoto, K. Fujii, Y.-S. Han, T.-H. Kim, Y. Katsumoto and M. Shibayama, Macromolecules 46(2013) 6225.

6.

Solvation Structure of Poly(ethylene glycol) in Ionic Liquids Studied by High-energy X-ray Diffraction and Molecular
Dynamics Simulations: H. Asai, K. Fujii, K. Nishi, T. Sakai, K. Ohara, Y. Umebayashi and M. Shibayama, Macromolecules 46 (2013) 2369.

7.

Structural Study on the UCST-Type Phase Separation of Poly(N -isopropylacrylamide) in Ionic Liquid: H. Asai, K.
Fujii, T. Ueki, S. Sawamura, Y. Nakamura, Y. Kitazawa, M. Watanabe, Y.-S. Han, T.-H. Kim and M. Shibayama, Macromolecules 46 (2013) 1101.

8.

Br nsted Basicity of Solute Butylamine in an Aprotic Ionic Liquid Investigated by Potentiometric Titration: K. Fujii, K.
Hashimoto, T. Sakai, Y. Umebayashi and M. Shibayama, Chem. Lett. 42 (2013) 1250.

9.

Dynamic light scattering microscope: Accessing opaque samples with high spatial resolution: T. Hiroi and M.
Shibayama, Opt. Express 21 (2013) 20260.
13

10. Gelation and cross-link inhomogeneity of phenolic resins studied by C-NMR spectroscopy and small-angle X-ray
scattering: A. Izumi, T. Nakao and M. Shibayama, Soft Matter 9 (2013) 4188.
11. Specific Solvation of Benzyl Methacrylate in 1-Ethyl-3-methylimidazolium Bis(trifluoromethanesulfonyl)amide Ionic
Liquid: M. Matsugami, K. Fujii, T. Ueki, Y. Kitazawa, Y. Umebayashi, M. Watanabe and M. Shibayama, Anal. Sci. 29(2013) 311.
12. Acid–base property of protic ionic liquid, 1-alkylimidazolium bis(trifluoromethanesulfonyl)amide studied by potentiometric titration: K. Hashimoto, K. Fujii and M. Shibayama, Journal of Molecular Liquids 188 (2013) 143.
13. Small-Angle Neutron Scattering Study on Aggregation of 1-Alkyl-3-methylimidazolium Based Ionic Liquids in
Aqueous Solution: T. Kusano, K. Fujii, M. Tabata and M. Shibayama, J Solution Chem 42 (2013) 1888.
14. Multiscale Dynamics of Inhomogeneity-Free Polymer Gels: T. Hiroi, M. Ohl, T. Sakai and M. Shibayama, Macromolecules 47 (2014) 763.
15. Small-Angle Neutron Scattering Study on Defect-Controlled Polymer Networks: K. Nishi, H. Asai, K. Fujii, Y.-S. Han,
T.-H. Kim, T. Sakai and M. Shibayama, Macromolecules 47 (2014) 1801.
16. SANS および SAXS によるフェノール樹脂硬化物の構造解析 : 和泉 篤士 , 中尾 俊夫 , 岩瀬 裕希 , 柴山 充弘 , 波
紋 24 (2014) 11-14.
17. 中性子散乱を用いた構造解析手法(2014) 1-10.

概説とエラストマー・高分子ゲル解析への応用 : 柴山 充弘 , ゴム協会編

18. SANS studies on catalyst ink of fuel cell: M. Shibayama, T. Matsunaga, T. Kusano, K. Amemiya, N. Kobayashi and T.
Yoshida, J. Appl. Polym. Sci. 131 (2014) 1-7.
19. 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.
20. 小角 X 線散乱法によるフェノール樹脂ゲル化メカニズムの解析 : 和泉 篤士 , 中尾 俊夫 , 柴山 充弘 , ネットワーク
ポリマー 34 (2013) 330-335.
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. 水面をかけ抜けるには？ : 東 昭 , 柴山 充弘 , 増淵 雄一 , ニュートンプレス(2013) 90-95.

23. 中性子小角散乱を用いた分子集合体の解析 : 草野 巧巳 , 柴山 充弘 , Colloid & Interface Communication 39 (2014)16-18.

142

ISSP Activity Report 201324. 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.
25. Computer simulation of network formation in natural rubber (NR): T. Nakao and S. Kohjiya, in: Chemistry, Manufacture and Applications of Natural Rubber, Kohjiya S. and Ikeda, Y. Eds., edited by S. Kohjiya and Y. Ikeda, (Woodhead,
Cambridge, UK, 2014), 216-246.

Yoshizawa groupA systematic study on spin dynamics in two-dimensional transition-metal oxides has 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, it shows a checkerboard-type spin-charge ordering, and the nature of the excitation spectrachanges its character and approaches to the metal-like behavior. Spin fluctuations in several quantum spin systems were alsostudied.
1.

†*

2.

Structural and magnetic properties in the quantum S=1/2 dimer system Ba3(Cr1-xVx)2O8 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).

3.

Magnetic structure of the conductive triangular-lattice antiferromagnet PdCrO2: H. Takatsu, G. Nénert, H. Kadowaki, H.
Yoshizawa, M. Enderle, S. Yonezawa, Y. Maeno, J. Kim, N. Tsuji, M. Takata, Y. Zhao, M. Green and C. Broholm, Phys.
Rev. B 89 (2014) 104408.

Long-range order and spin-liquid states of polycrystalline Tb2+xTi2−xO7+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).

Yamamuro group
Our laboratory is studying chemical physics of complex condensed matters by using neutron scattering, X-ray diffraction,
calorimetric, dielectric, and viscoelastic techniques. Our target materials are glasses, liquids, and various disordered systems.
This year, there were two important outcomes in the study of ionic liquids. The first one, which was found in the quasielastic
neutron scattering (QENS) and viscoelastic measurements, is that the inter-ionic motion is directly associated with the glasstransitions in imidazolium-bases ionic liquids. The second one is that the origin of the low-Q diffraction peak, which is atypical property of the ionic liquids, is a local structure similar to that of a liquid-crystalline (SmA) phase. This was obtained
from differential scanning calorimetry (DSC) and X-ray diffraction experiments. In the QENS study of a porous coordination
polymer MIL-53, we have found that protons are carried by both water and ammonia molecules which are more mobile thanthose in bulk states. Other than these topics, we have made some progresses in the studies on palladium hydrides and vapordeposited simple molecular glasses.
1.

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. 82 (2013) SA010 (8 pages).

2.

Hyperfine structure of magnetic excitations in a novel Tb based single molecule magnet studied by high-resolution
neutron spectroscopy: M. Kofu, T. Kajiwara, M. Nakano, K. Nakajima, S. Ohira-Kawamura, T. Kikuchi, Y. Inamura andO. Yamamuro, Phys. Rev. B 88 (2013) 064405 (7 pages).

3.

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.

4.

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 87 (2013) 062314 (8 pages).

5.

Magnetic relaxations in a Tb-based single molecule magnet studied by quasielastic neutron scattering: M. Kofu, T.
Kajiwara, J. S. Gardner, G. G. Simeoni, M. Tyagi, K. Nakajima, S. Ohira-Kawamura, M. Nakano and O. Yamamuro,Chem. Phys. 427 (2013) 147-152.

6.

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.

ISSP Activity Report 2013

143

7.

Thermal behaviour, structure and dynamics of low-temperature water confined in mesoporous organosilica by differential 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.

8.

Relationship between the local dynamics and gas permeability of polyacetylenes containing polymethylated indan/tetrahydronaphtalene moieties: R. Inoue, T. Kanaya, Y. Hu, T. Masuda, K. Nishida and O. Yamamuro, Polymer 55 (2014)
182-186.

9.

Proton Dynamics of Two Dimensional Oxalate-Bridged Coordination Polymers: S. Miyatsu, M. Kofu, A. Nagoe, T.
Yamada, M. Sadakiyo, T. Yamada, H. Kitagawa, M. Tyagi, V. Garcia Sakai and O. Yamamuro, Phys. Chem. Chem. Phys.
(2014), accepted for publication.

10. 連載講座「中性子散乱による原子・分子のダイナミクスの観測」III 原子・分子のダイナミクス「液体・非晶質・表面／界面」: 山室 修 , RADIOISOTOPES 62 (2013) 691-701.

Masuda group
Recently the discovery of the multiferroics, i.e., enhanced simultaneous orders in magnetism and dielectricity,revived the studyof the magnetoelectric effect. A number of studies had revealed its mechanism and clarified the relationships between dielectric and magnetic structures in homogeneous systems. Next challenge would be to find and study a new magnetoelectric effectin inhomogeneous system. A remarkable example in an inhomogeneous system is a magnet having relaxor property, relaxor
magnet. In 2013 our group studied a new relaxor magnet, LuFeCoO4, by combination of bulk properties measurements andneutron diffraction technique. Our study reveals a novel relationship between PNRs and magnetic correlation, and establishes
the magnetic and dielectric phase diagrams of the relaxor magnet.
1.

Quantum-Phase-Transition-Induced Multiferroics and Higgs Mode in Integer Spin Systems in Noncentrosymmetric
Lattice with Strong Single-Ion Anisotropy: M. Matsumoto, M. Soda and T. Masuda, J. Phys. Soc. Jpn. 82 (2013)
093703.

2.

63,65

3.

三軸分光器入門 : 益田 隆嗣 , 波紋 23 (2013) 223-229.

4.

Spin-Nematic Interaction in the Multiferroic Compound Ba2CoGe2O7: M. Soda, M. Matsumoto, M. Mansson, S. OhiraKawamura, K. Nakajima, R. Shiina and T. Masuda, Phys. Rev. Lett. 112 (2014) 127205.

5.

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.

Cu Nuclear Resonance Study of the Coupled Spin Dimers and Chains Compound Cu2Fe2Ge4O13: J. Kikuchi, S.
Nagura, K. Murakami, T. Masuda and G. J. Redhammer, J. Phys. Soc. Jpn. 82 (2013) 034710(1-10).

International MegaGauss Science Laboratory
Takeyama group
The electro-magnetic flux compression techniques have been established to generate magnetic fields over 700 T by employing
a new type of primary coil (a copper lined iron coil). In such a high magnetic field, a measurement of the magnetic field should
be reconsidered. In pulse magnet operation, the magnetic field has been determined by a pick-up coil, wound around a thin rod,
converted from the detected induced voltage from dφ /dt (φ, a magnetic flux), followed by a certain process of calibration. We
have found recently that the pick-up coil is not a reliable method anymore in such an extremely high magnetic fields. A Faraday
rotation angle of quartz and the other glasses was measured up to a peak field and is calibrated with the signals from the pick-up
coil. The present study revealed that the conventional pick-up coil method underestimated the values of the peak fields at least
10 %, so that 730 T ever reported could possibly reach 800 T.
1.

Band-edge exciton states in a single-walled carbon nanotube revealed by magneto-optical spectroscopy in ultrahighmagnetic fields: W. Zhou, T. Sasaki, D. Nakamura, H. Liu, H. Kataura and S. Takeyama, Phys. Rev. B 87 (2013)
241406(1-4).

2.

*

144

Cyclotron resonance in ferromagnetic InMnAs and InMnSb: G. Khodaparast, Y. H. Matsuda, D. Saha, G. Sanders,C. Stanton, H. Saito, S. Takeyama, T. Merritt, C. Feeser, B. Wessels, X. Liu and J. Furdyna, Phys. Rev. B 88 (2013)
235204(11pages).

ISSP Activity Report 2013

3.

Magnetic superfluid state in the frustrated spinel oxide CdCr2O4 revealed by ultrahigh magnetic fields: A. Miyata, S.
Takeyama and H. Ueda, Phys. Rev. B 87 (2013) 214424(1-6).

4.

Magneto-photoluminescence of charged excitons from MgxZn1−xO/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).

5.

*

6.

*

7.

*

8.

†*

9.

*

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).
Magnetization of SrCu2(BO3)2 in Ultrahigh Magnetic Fields up to 118 T: Y. H. Matsuda, N. Abe, S. Takeyama, H.
Kageyama, P. Corboz, A. Honecker, S. R. Manmana, G. R. Foltin, K. P. Schmidt and F. Mila, Phys. Rev. Lett. 111(2013) 137204 (5 pages).
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.
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.
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.

10. Exciton-phonon bound complex in single-walled carbon nanotubes revealed by high-field magneto-optical spectroscopy: W. Zhou, T. Sasaki, D. Nakamura, H. Saito, H. Liu, H. Kataura and S. Takeyama, Appl. Phys. Lett. 103 (2013)
233101.
11. Survey of exciton-phonon sidebands by magneto-optical spectroscopy using highly specified (6,5) single-walled carbon
nanotubes: W. Zhou, T. Sasaki, D. Nakamura, H. Saito, H. Liu, H. Kataura and S. Takeyama, Appl. Phys. Lett. 103(2013) 021117(1-4).
12. Infrared cyclotron resonances of Dirac electrons in SiC epitaxial graphene in ultra-high magnetic fields: H. Saito, D.
Nakamura, S. Takeyama and H. Hibino, AIP Conf. Proc. 1566 (2013) 145.
*

13. Magneto-optical study of Dirac fermion in quartz CVD-grown graphene above 100 T: D. Nakamura, H. Saito, W.
Zhou, Y. H. Matsuda, S. Takeyama, K. Yagi, K. Hayashi and S. Sato, AIP Conf. Proc. 1566 (2013) 169-170.
14. Magneto-optical survey of 1st and 2nd sub-bands in chirality specific (6, 5) single-walled carbon nanotube up to 190 T:
T. Sasaki, W. Zhou, D. Nakamura, H. Liu, H. Kataura and S. Takeyama, AIP Conf. Proc. 1566 (2013) 171.
15. Canted 2:1:1 Magnetic Supersolid Phase in a Frustrated Magnet MgCr2O4 as a Small Limit of the Biquadratic Spin
Interaction: A. Miyata, H. Ueda and S. Takeyama, J. Phys. Soc. Jpn. 83 (2014) 063702(1-4).
16. Note: Experimental evidence of three-dimensional dynamics of an electromagnetically imploded liner: D. Nakamura, H.
Sawabe and S. Takeyama, Rev. Sci. Instrum. 85 (2014) 036102.

Kindo group
A new user coil has been installed. The coil can generate a short pulsed field with duration of 4 ms. 75 T field can be used every
half hour. A new long-pulse magnet has been installed. The magnet can generate a long pulsed field with duration of about 1
sec. The maximum field of 36 T can be generated. Heat capacity measurement under the long pulsed field can be carried out.
1.

†

2.

Collapse of Magnetic Order of the Quasi One-Dimensional Ising-Like Antiferromagnet BaCo2V2O8 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).

3.

†

4.

†*

Antiferromagnetic ordering in Sr2CrO4: M. Rani, H. Sakurai, S. Okubo, K. Takamoto, R. Nakata, T. Sakurai, H. Ohta,
A. Matsuo, Y. Kohama, K. Kindo and J. Ahmad, J. Phys.: Condens. Matter 25 (2013) 226001(1-5).

Crystal Structure and Magnetic Properties of the Verdazyl Biradical m-Ph-V2 Forming a Ferromagnetic Alternating
Double Chain: K. Iwase, H. Yamaguchi, T. Ono, T. Shimokawa, H. Nakano, A. Matsuo, K. Kindo, H. Nojiri and Y.
Hosokoshi, J. Phys. Soc. Jpn. 82 (2013) 074719(1-6).
High-Field Phase Diagram of SmRu4P12 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).

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5.

†

6.

Metamagnetic Behavior and Effect of Pressure on the Electronic State in Heavy-Fermion Compound YbRh2Zn20: F.
Honda, T. Takeuchi, S. Yasui, Y. Taga, S. Yoshiuchi, Y. Hirose, Y. Tomooka, K. Sugiyama, M. Hagiwara, K. Kindo, R.
Settai and Y. Onuki, J. Phys. Soc. Jpn. 82 (2013) 084705(1-10).

7.

†

8.

*

9.

†

Marked Change in the Ground State of CeRu2Al10 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).

Spin-Dependent Molecular Orientation of O2–O2 Dimer Formed in the Nanoporous Coordination Polymer: A. Hori, T.
C. Kobayashi, Y. Kubota, A. Matsuo, K. Kindo, J. Kim, K. Kato, M. Takata, H. Sakamoto, R. Matsuda and S. Kitagawa,J. Phys. Soc. Jpn. 82 (2013) 084703(6).
Temperature and Magnetic Field Dependent Yb Valence in YbRh2Si2 Observed by X-ray Absorption Spectroscopy: H.
Nakai, T. Ebihara, S. Tsutsui, M. Mizumaki, N. Kawamura, S. Michimura, T. Inami, T. Nakamura, A. Kondo, K. Kindo
and Y. H. Matsuda, J. Phys. Soc. Jpn. 82 (2013) 124712 (5pages).
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).

†

10. High magnetic field study of the Tm2Fe17 and Tm2Fe17D3.2 compounds: O. Isnard, A. V. Andreev, M. D. Kuz'min, Y.
Skourski, D. I. Gorbunov, J. Wosnitza, N. V. Kudrevatykh, A. Iwasa, A. Kondo, A. Matsuo and K. Kindo, Phys. Rev. B
88 (2013) 174406(1-10).
11.

†*

12.

†*

Quasi-one-dimensional S=1/2 Heisenberg antiferromagnetic chain consisting of the organic radical p-Br-V: K. Iwase,
H. Yamaguchi, T. Ono, Y. Hosokoshi, T. Shimokawa, Y. Kono, S. Kittaka, T. Sakakibara, A. Matsuo and K. Kindo, Phys.
Rev. B 88 (2013) 184431(1-5).
Various regimes of quantum behavior in an S=1/2 Heisenberg antiferromagnetic chain with fourfold periodicity: H.
Yamaguchi, T. Okubo, K. Iwase, T. Ono, Y. Kono, S. Kittaka, T. Sakakibara, A. Matsuo, K. Kindo and Y. Hosokoshi,
Phys. Rev. B 88 (2013) 174410(1-5).

†

13. Magnetization Process and Collective Excitations in the S=1/2 Triangular-Lattice Heisenberg Antiferromagnet
Ba3CoSb2O9: T. Susuki, N. Kurita, T. Tanaka, H. Nojiri, A. Matsuo, K. Kindo and H. Tanaka, Phys. Rev. Lett. 110(2013) 267201(5).
14.

†*

15.

†*

High Field Magnetization of TbPd2Ge2 Single Crystal: T. Shigeoka, T. Hasegawa, T. Fujiwara, A. Kondo, K. Kindo
and Y. Uwatoko, J. Low Temp. Phys. 170 (2013) 248-254.
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.

*

16. Observation of Field-induced Anomaly in High-field Magnetization on a Complex Spin-Driven Multiferroic
Compound, LiCu2−zZnzO2: J. L. Her, H. C. Hsu, Y. H. Matsuda, K. Kindo and F. C. Chou, J. Low Temp. Phys. 170(2013) 285-290.
†

17. 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.
18.

†*

Magnetic field hysteresis under various sweeping rates for Ni-Co-Mn-In metamagnetic shape memory alloys: X. Xu,
T. Kihara, M. Tokunaga, A. Matsuo, W. Ito, R. Y. Umetsu, K. Kindo and R. Kainuma, Appl. Phys. Lett. 103 (2013)
122406(1-4).

†

19. Itinerant electron magnetism of η-carbides Co6M6C and Ni6M6C (M=Mo and W): T. Waki, D. Furusawa, Y. Tabata, C.
Michioka, K. Yoshimura, A. Kondo, K. Kindo and H. Nakamura, J. Alloys Compd. 554 (2013) 21-24.
20.

†*

Optical imaging and magnetocaloric effect measurements in pulsed high magnetic fields and their application to Ni–
Co–Mn–In Heusler alloy: T. Kihara, I. Katakura, M. Tokunaga, A. Matsuo, K. Kawaguchi, A. Kondo, K. Kindo, W. Ito,
X. Xu and R. Kainuma, J. Alloys Compd. 577 (2013) S722-S725.

†

21. Magnetoresistance and Transformation Hysteresis in the Ni50Mn34.4In15.6 Metamagnetic Shape Memory Alloy: R. Y.
Umetsu, K. Endo, A. Kondo, K. Kindo, W. Ito, X. Xu, T. Kanomata and R. Kainuma, Mater. Trans. 54 (2013) 291.
†

22. Magnetic properties of the frustrated magnet Cu5(PO4)3(OH)4 on a peculiar spin network composed of pentagons andtriangles: H. Kikuchi, Y. Nguyen Thi Tinh, Y. Fujii, A. Matsuo and K. Kindo, J. Kor. Phys. Soc. 62 (2013) 2037-2040.

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23. Heat-pulse measurements of specific heat in 36 ms pulsed magnetic fields: Y. Kohama, Y. Hashimoto, S. Katsumoto,
M. Tokunaga and K. Kindo, Meas. Sci. Technol. 24 (2013) 115005(1-9).
†

24. Spin Frustration and Field-Induced Transitions of Modified Pyrochlore Fluorides ACr2F6 (A = Rb and Cs): H. Ueda, A.
Matsuo, K. Kindo and K. Yoshimura, J. Phys. Soc. Jpn. 83 (2014) 014701(1-6)
25.

†

Unconventional spin freezing in the highly two-dimensional spin-l/2 kagome antiferromagnet
Cd2Cu3(OH)6(SO4)24H2O: Evidence of partial order and coexisting spin singlet state on a distorted kagome lattice:
M. Fujihala, X.-G. Zheng, H. Morodomi, T. Kawae, A. Matsuo, K. Kindo and I. Watanabe, Phys. Rev. B 89 (2014)
100401(1-5).

Tokunaga group
By measuring the resistance of thin-film thermometers deposited on the sample surface, we succeeded in rapid temperaturemonitoring of the sample with the response time shorter than 0.1 ms. With using this technique, we developed a measurement
system of magneto-caloric effects in pulsed high magnetic fields up to 55 T. This technique provides us of novel thermodynamic
information of various kind of phase transitions induced in high magnetic fields and also direct information of the entropy infrustrated magnets.
1.

Giant Magnetoresistance Effect in the Metal–Insulator Transition of Pyrochlore Oxide Nd2Ir2O7: K. Matsuhira, M.
Tokunaga, M. Wakeshima, Y. Hinatsu and S. Takagi, J. Phys. Soc. Jpn. 82 (2013) 023706(1-4).

2.

High-Field Magnetization of Quasi-One-Dimensional Ising-Like Antiferromagnet TlCoCl3: Y. Nishiwaki, M. Tokunaga,
N. Todoroki and T. Kato, J. Phys. Soc. Jpn. 82 (2013) 104717(1-5).

3.

Metamagnetic Transition and Its Related Magnetocapacitance Effect in Phthalocyanine-Molecular Conductor Exhibiting
Giant Magnetoresistance: N. Hanasaki, T. Tateishi, H. Tajima, M. Kimata, M. Tokunaga, M. Matsuda, A. Kanda, H.
Murakawa, T. Naito and T. Inabe, J. Phys. Soc. Jpn. 82 (2013) 094713(1-5).

4.

Thermal Transport and Magnetotransport Properties of CuCr1-xMgxO2 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).

5.

Magnetic control of electric polarization in the noncentrosymmetric compound (Cu,Ni)B2O4: N. D. Khanh, N. Abe, K.
Kubo, M. Akaki, M. Tokunaga, T. Sasaki and T. Arima, Phys. Rev. B 87 (2013) 184416(1-5).

6.

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).

7.

†*

8.

Field-Induced Magnetostructural Transitions in Antiferromagnetic Fe1+yTe1-xSx: 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 Sr2CoSi2O7 Crystal: M. Akaki, T. Tadokoro, T.
Kihara, M. Tokunaga and H. Kuwahara, J. Low Temp. Phys. 170 (2013) 291-295.

10.

†*

Adiabatic measurements of magneto-caloric effects in pulsed high magnetic fields up to 55 T: T. Kihara, Y. Kohama,
Y. Hashimoto, S. Katsumoto and M. Tokunaga, Rev. Sci. Instrum. 84 (2013) 074901(1-7).

Magnetic field hysteresis under various sweeping rates for Ni-Co-Mn-In metamagnetic shape memory alloys: X. Xu,
T. Kihara, M. Tokunaga, A. Matsuo, W. Ito, R. Y. Umetsu, K. Kindo and R. Kainuma, Appl. Phys. Lett. 103 (2013)
122406(1-4).

11. Detection of Berry's Phase in a Bulk Rashba Semiconductor: H. Murakawa, M. S. Bahramy, M. Tokunaga, Y. Kohama,
C. Bell, Y. Kaneko, N. Nagaosa, H. Y. Hwang and Y. Tokura, Science 342 (2013) 1490-1493.
12. Spin Frustration from cis -Edge or -Corner Sharing Metal-Centered Octahedra: R. Gautier, K. Oka, T. Kihara, N.
Kumar, A. Sundaresan, M. Tokunaga, M. Azuma and K. R. Poeppelmeier, J. Am. Chem. Soc. 135 (2013) 19268-19274.
13.

†*

Optical imaging and magnetocaloric effect measurements in pulsed high magnetic fields and their application to Ni–
Co–Mn–In Heusler alloy: T. Kihara, I. Katakura, M. Tokunaga, A. Matsuo, K. Kawaguchi, A. Kondo, K. Kindo, W. Ito,
X. Xu and R. Kainuma, J. Alloys Compd. 577 (2013) S722-S725.

14. Optical Microscopic Study on NiCoMnAl Metamagnetic Shape Memory Alloy by In Situ Observation under a PulsedHigh Magnetic Field: X. Xu, I. Katakura, T. Kihara, M. Tokunaga, W. Ito, R. Y. Umetsu and R. Kainuma, Mater. Trans.
54 (2013) 357-362.

ISSP Activity Report 2013147

15. Anisotropic magnetic properties in Åkermanite Sr2MSi2O7 (M=Co, Mn) crystals: M. Akaki, T. Tadokoro, H. Kuwahara,
T. Kihara and M. Tokunaga, J. Kor. Phys. Soc. 62 (2013) 1812-1814.
16. Magnetotransport property of the hole-doped delafossite CuCr0.97Mg0.03O2 with a Spin-3/2 antiferromagnetic triangularsublattice: T. Okuda, S. Oozono, T. Kihara and M. Tokunaga, J. Kor. Phys. Soc. 62 (2013) 2168-2172.
*

17. Heat-pulse measurements of specific heat in 36 ms pulsed magnetic fields: Y. Kohama, Y. Hashimoto, S. Katsumoto,
M. Tokunaga and K. Kindo, Meas. Sci. Technol. 24 (2013) 115005(1-9).

Y. Matsuda group
The magnetization process of SrCu2(BO3)2 shows exotic multi-plateau structure, indicating the crystallization of the excitedtriplet dimers with the several factional fillings in the sea of the singlet dimers. We have succeeded in observing the magnetization curve of SrCu2(BO3)2 in ultrahigh magnetic fields of up to 118 Tesla. The long predicted 1/2 plateau has been clearlyobserved at the field range from 84 to 108 Tesla for the first time. A destructive way of magnetic field generation, singleturn coil method (STC), was used for the experiment. In addition to the magnetization measurement, the cyclotron resonancein ferromagnetic semiconductors and magneto-absorption spectroscopy in solid oxygen have been performed at very highmagnetic fields over 100 Tesla. The synchrotron x-ray spectroscopy on Yb-based heavy fermion compounds YbRh2Si2 andYbAlB4 revealed that the valence instability was affected by a strong magnetic field, suggesting the importance of the charge
degree of freedom for understanding their exotic properties at very low temperatures.
1.

*

2.

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).

3.

*

4.

*

5.

*

6.

*

7.

†*

8.

*

9.

*

Temperature and Magnetic Field Dependent Yb Valence in YbRh2Si2 Observed by X-ray Absorption Spectroscopy: H.
Nakai, T. Ebihara, S. Tsutsui, M. Mizumaki, N. Kawamura, S. Michimura, T. Inami, T. Nakamura, A. Kondo, K. Kindo
and Y. H. Matsuda, J. Phys. Soc. Jpn. 82 (2013) 124712 (5pages).

Cyclotron resonance in ferromagnetic InMnAs and InMnSb: G. Khodaparast, Y. H. Matsuda, D. Saha, G. Sanders,C. Stanton, H. Saito, S. Takeyama, T. Merritt, C. Feeser, B. Wessels, X. Liu and J. Furdyna, Phys. Rev. B 88 (2013)
235204(11pages).
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).
Magnetization of SrCu2(BO3)2 in Ultrahigh Magnetic Fields up to 118 T: Y. H. Matsuda, N. Abe, S. Takeyama, H.
Kageyama, P. Corboz, A. Honecker, S. R. Manmana, G. R. Foltin, K. P. Schmidt and F. Mila, Phys. Rev. Lett. 111(2013) 137204 (5 pages).
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.
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.
Observation of Field-induced Anomaly in High-field Magnetization on a Complex Spin-Driven Multiferroic
Compound, LiCu2−zZnzO2: J. L. Her, H. C. Hsu, Y. H. Matsuda, K. Kindo and F. C. Chou, J. Low Temp. Phys. 170(2013) 285-290.
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.

10. Structural and electrical characteristics of high-κ ErTixOy gate dielectrics on InGaZnO thin-film transistors: F.-H. Chen,
J.-L. Her, Y.-H. Shao, W.-C. Li, Y. H. Matsuda and T.-M. Pan, Thin Solid Films 539 (2013) 251-255.
11. 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.
*

12. Magneto-optical study of Dirac fermion in quartz CVD-grown graphene above 100 T: D. Nakamura, H. Saito, W.
Zhou, Y. H. Matsuda, S. Takeyama, K. Yagi, K. Hayashi and S. Sato, AIP Conf. Proc. 1566 (2013) 169-170.
*

13. Chemical effects of high-resolution Yb Lγ 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 Spectrom. 42 (2013)450-455.

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14. Synchrotron X-ray spectroscopy study on the valence state in α- and β-YbAlB4 at low temperatures and high magnetic
fields: Y. H. Matsuda, T. Nakamura, K. Kuga, S. Nakatsuji, S. Michimura, T. Inami, N. Kawamura and M. Mizumaki, J.
Kor. Phys. Soc. 62 (2013) 1778-1781.
15. Structural and electrical characteristics of high-κ Er2O3 and Er2TiO5 gate dielectrics for a-IGZO thin-film transistors:
F.-H. Chen, J.-L. Her, Y.-H. Shao, Y. H. Matsuda and T.-M. Pan, Nanoscale Res Lett 8 (2013) 18 (5 pages).
*

16. Magnetization of Yb-based mixed-valent compounds at megagauss fields: T. Terashima, Y. H. Matsuda, K. Kuga, Y.
Matsumoto and S. Nakatsuji, J. Phys. Soc. Jpn. (2014), in print.

Center of Computational Materials Science
Akai group
We have developed methodologies that enable us to calculate electronic structure of wide range of systems such as strongly
correlated systems and systems in non-equlibrium states. One of them is a scheme of first-principles calculation of the
non-equilibrium Green's function of tunnelling junctions in the framework of the Korringa-Kohn-Rostoker (KKR) Green's
function method is developed. Another is the optimized effective potential (OEP) method applied to static RPA scheme. The
latter includes an elaboration that dissolves a well-known difficulty arising from the indefiniteness inherent in the theory of
OEP. One of main topics we are now working on is the theory of permanent magnet. This year we have developed the theory ofmagnetic anisotropy of Sm-Fe-N magnet, in particular discussing the role of N that experimentally is is known to be importantto realize the uni-axial magnetic anisotropy of this system.
1.

Basic and applications of Moessbauer spectrometry and the electronics structure of matters: H. Akai, ISOTOPES 63(2014) 163-174.

2.

鉄の事典 : 赤井 久純 , ( 朝倉書店 , 東京 , 2014) in print.

Todo group
We study novel phases and critical phenomena in strongly correlated many-body systems, such as quantum magnets and BoseHubbard model, by using the state-of-the-art computational physics techniques like the quantum Monte Carlo method. We also
develop new computational algorithms for quantum many-body systems, such as the tensor-network method, study the parallelization technique for supercomputers, and develop open-source software for next-generation parallel simulations: (1) Analysis
of quantum phases and quantum phase transitions by local Z2 Berry phase (2) Critical phenomena of long-range interacting spinmodel (3) Quantum phase transition of SU(N) J-Q model (4) Irreversible Markov chain Monte Carlo (5) Simulation method forsystems with strong spatial anisotropy (6) Parallelization of worm algorithm quantum Monte Carlo method (7) Parallel exact
diagonalization package “Rokko".
1.

Long-Range Order of the Three-Sublattice Structure in the S =1 Heisenberg Antiferromagnet on a Spatially Anisotropic
Triangular Lattice: H. Nakano, S. Todo and T. Sakai, J. Phys. Soc. Jpn. 82 (2013) 043715.

2.

*

3.

Monte Carlo simulation with aspect-ratio optimization: Anomalous anisotropic scaling in dimerized antiferromagnets:
S. Yasuda and S. Todo, Phys. Rev. E 88 (2013) 061301.

4.

Path-integral Monte Carlo method for the local Z2 Berry phase: Y. Motoyama and S. Todo, Phys. Rev. E 87 (2013)
021301(1-5).

5.

Geometric allocation approaches in Markov chain Monte Carlo: S. Todo and H. Suwa, J. Phys.: Conf. Ser. 473 (2013)
012013.

6.

詳細つりあいを満たさないマルコフ連鎖モンテカルロ法とその一般化 : 諏訪 秀麿 , 藤堂 眞治 , 数理解析研究所 講究録 1848 (2013) 93.

7.

Numerical Analysis of Quantum Phase Transitions with Dynamic Control of Anisotropy: S. Yasuda and S. Todo, JPS
Conf. Proc. 1 (2014) 012127.

8.

Path-Integral Monte Carlo for the Gauge-Fixed Berry Connection and the Local Z2 Berry Phase: Y. Motoyama and S.
Todo, JPS Conf. Proc. 1 (2014) 012130.

Possibility of deconfined criticality in SU(N) Heisenberg models at small N: K. Harada, T. Suzuki, T. Okubo, H.
Matsuo, J. Lou, H. Watanabe, S. Todo and N. Kawashima, Phys. Rev. B 88 (2013) 220408(1-4).

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9.

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
To study ultrafast spin dynamics in canted ferromagnets, terahertz pump-Faraday probe experiments were performed on orthoferrites and several new aspects were revealed as follows. (1) Extremely long coherence time and beating phenomena were
found in spin precession modes. (2) Dynamics of magnetic anisotropy parameters modified by optical excitation was observed.
(3) Resonance enhancement of the spin precession by using a metamaterial structure (split ring resonator) was demonstrated. As
for the photoinduced phase transition, femtosecond dynamics in a novel nanocrystalline titanium oxide was studied and ultrafast phase change was confirmed, which guarantees usefulness of this material for optical storage. Newtons's ring in soft x-ray
region (at 13.9 nm) was firstly observed during the laser ablation process, suggesting an extremely thin and flat expansion front.
1.

†

2.

*

3.

*

4.

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.

5.

Dielectric probe for scattering-type terahertz scanning near-field optical microscopy: T. Kurihara, K. Yamaguchi, H.
Watanabe, M. Nakajima and T. Suemoto, Appl. Phys. Lett. 103 (2013) 151105.

6.

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).

7.

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).

8.

†

9.

†

Dynamics of pulsed laser ablation in high-density carbon dioxide including supercritical fluid state: K. Urabe, T. Kato,
S. Stauss, S. Himeno, S. Kato, H. Muneoka, M. Baba, T. Suemoto and K. Terashima, J. Appl. Phys. 114 (2013) 143303.
Access to hole dynamics in graphite by femtosecond luminescence and photoemission spectroscopy: T. Suemoto, S.
Sakaki, M. Nakajima, Y. Ishida and S. Shin, Phys. Rev. B 87 (2013) 224302(1-5).

Mechanism of Enhanced Optical Second-Harmonic Generation in the Conducting Pyrochlore-Type Pb2Ir2O7-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).

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).
Probing of local structures of thermal and photoinduced phases in rubidium manganese hexacyanoferrate by resonant
Raman spectroscopy: R. Fukaya, A. Asahara, S. Ishige, M. Nakajima, H. Tokoro, S.-I. Ohkoshi and T. Suemoto, J.
Chem. Phys. 139 (2013) 084303(1-7).

†

10. The synthesis of rhodium substituted ε-iron oxide exhibiting super high frequency natural resonance: A. Namai, M.
Yoshikiyo, S. Umeda, T. Yoshida, T. Miyazaki, M. Nakajima, K. Yamaguchi, T. Suemoto and S. Ohkoshi, Journal of
Materials Chemistry C 1 (2013) 5200-5206.
*

11. Gain-switching dynamics in optically pumped single-mode InGaN vertical-cavity surface-emitting lasers: S. Chen, A.
Asahara, T. Ito, J. Zhang, B. Zhang, T. Suemoto, M. Yoshita and H. Akiyama, Optics Express 22 (2014) 4196-4201.
*

12. Spectral dynamics of picosecond gain-switched pulses from nitride-based vertical-cavity surface-emitting lasers: S.
Chen, T. Ito, A. Asahara, M. Yoshita, W. Liu, J. Zhang, B. Zhang, T. Suemoto and H. Akiyama, Sci. Rep. 4 (2014) 4325.

Shin group
We studied high Tc Fe-pnictide superconductors using 7-eV laser. High resolution photoemission study with polarization dependence is very powerful for the study of the superconducting mechanism. Orbital fluctuation mechanism is also important inaddition to the spin fluctuation mechanism.
1.

150

Bulk-Sensitive Angle-Resolved PhotoemissionSpectroscopy on TTF-TCNQ: K. Koizumi, K. Ishizaka, T. Kiss, M.
Okawa, R. Kato and S. Shin, J. Phys. Soc. Jpn. 82 (2013) 025004(1-2).

ISSP Activity Report 2013

2.

*

3.

Quantifying covalency and metallicity in correlated compounds undergoing metal-insulator transitions: A. Chainani,
A. Yamamoto, M. Matsunami, R. Eguchi, M. Taguchi, Y. Takata, S. Shin, Y. Nishino, M. Yabashi, K. Tamasaku and T.
Ishikawa, Phys. Rev. B 87 (2013) 045108(1-10).

4.

†*

5.

†*

6.

Existence of Orbital Order and its Fluctuation in Superconducting Ba(Fe1-xCox)2As2 Single Crystals Revealed by
X-ray Absorption Spectroscopy: YK. Kim, WS. Jung, GR. Han, KY. Choi, CC. Chen, TP. Devereaux, A. Chainani, J.
Miyawaki, Y. Takata, Y. Tanaka, M. Oura, S. Shin, A. P. Singh, H. G Lee, JY. Kim and C. Kim, Phys. Rev. Lett. 111(2013) 217001(1-5).

7.

†*

8.

Strongly Spin-Orbit Coupled Two-Dimensional Electron Gas Emerging near the Surface of Polar Semiconductors:
M. Sakano, M. S. Bahramy, A. Katayama, T. Shimojima, H. Murakawa, Y. Kaneko, W. Malaeb, S. Shin, K. Ono, H.
Kumigashira, R. Arita, N. Nagaosa, H. Y. Hwang, Y. Tokura and K. Ishizaka, Phys. Rev. Lett. 110 (2013) 107204(1-5).

9.

*

10.

†*

11.

*

Access to hole dynamics in graphite by femtosecond luminescence and photoemission spectroscopy: T. Suemoto, S.
Sakaki, M. Nakajima, Y. Ishida and S. Shin, Phys. Rev. B 87 (2013) 224302(1-5).

Anomalous Doping Variation of the Nodal Low-Energy Feature of Superconducting (Bi,Pb)2(Sr, La)2CuO6+δ Crystals
Revealed by Laser-Based Angle-Resolved Photoemission Spectroscopy: T. Kondo, Y. Nakashima, W. Malaeb, Y. Ishida,
Y. Hamaya, T. Takeuchi and S. Shin, Phys. Rev. Lett. 110 (2013) 217006(1-5).
Anomalous Dressing of Dirac Fermions in the Topological Surface State of Bi2Se3, Bi2Te3, and Cu-Doped Bi2Se3: T.
Kondo, Y. Nakashima, Y. Ota, Y. Ishida, W. Malaeb, K. Okazaki, S. Shin, M. Kriener, S. Sasaki, K. Segawa and Y. Ando,Phys. Rev. Lett. 110 (2013) 217601(1-5).

Selective Probing of the OH or OD Stretch Vibration in Liquid Water Using Resonant Inelastic Soft-X-Ray Scattering:
Y. Harada, T. Tokushima, Y. Horikawa, O. Takahashi, H. Niwa, M. Kobayashi, M. Oshima, Y. Senba, H. Ohashi, KT.
Wikfeldt, A. Nilsson, LGM. Pettersson and S. Shin, Phys. Rev. Lett. 111 (2013) 193001(1-5).

Resonant inelastic X-ray scattering of liquid water: A. Nilsson, T. Tokushima, Y. Horikawa, Y. Harada, M. P. Ljungberg,
S. Shin and L. G. M. Pettersson, J. Electron Spectrosc. Relat. Phenom. 188 (2013) 84-100.
Surface electronic structure of the topological Kondo-insulator candidate correlated electron system SmB6: M.
Neupane, N. Alidoust, S. -Y. Xu, T. Kondo, Y. Ishida, D. J. Kim, C. Liu, I. Belopolski, Y. J. Jo, T. -R. Chang, H. -T. Jeng,
T. Durakiewicz, L. Balicas, H. Lin, A. Bansil, S. Shin, Z. Fisk and M. Z. Hasan, Nat. Commun. 4 (2013) 2991(1-7).
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.

12. Evidence for excluding the possibility of d-wave superconducting-gap symmetry in Ba-doped KFe2As2: Y. Ota, K.
Okazaki, Y. Kotani, T. Shimojima, W. Malaeb, S. Watanabe, C. -T. Chen, K. Kihou, C. H. Lee, A. Iyo, H. Eisaki, T.
Saito, H. Fukazawa, Y. Kohori and S. Shin, Phys. Rev. B 89 (2014) 081103(1-5).
13.

†*

Observation of a giant Kerr rotation in a ferromagnetic transition metal by M-edge resonant magneto-optic Kerr effect:
Sh. Yamamoto, M. Taguchi, M. Fujisawa, R. Hobara, S. Yamamoto, K. Yaji, T. Nakamura, K. Fujikawa, R. Yukawa, T.
Togashi, M. Yabashi, M. Tsunoda, S. Shin and I. Matsuda, Phys. Rev. B 89 (2014) 064423(1-6).

*

14. Pseudogap formation above the superconducting dome in iron pnictides: T. Shimojima, T. Sonobe, W. Malaeb, K.
Shinada, A. Chainani, S. Shin, T. Yoshida, S. Ideta, A. Fujimori, H. Kumigashira, K. Ono, Y. Nakashima, H. Anzai, M.
Arita, A. Ino, H. Namatame, M. Taniguchi, M. Nakajima, S. Uchida, Y. Tomioka, T. Ito, K. Kihou, C. H. Lee, A. Iyo,
H. Eisaki, K. Ohgushi, S. Kasahara, T. Terashima, H. Ikeda, T. Shibauchi, Y. Matsuda and K. Ishizaka, Phys. Rev. B 89
(2014) 045101(1-10).
15.

†*

Ultrafast photoinduced transition of an insulating VO2 thin film into a nonrutile metallic state: R. Yoshida, T.
Yamamoto, Y. Ishida, H. Nagao, T. Otsuka, K. Saeki, Y. Muraoka, R. Eguchi, K. Ishizaka, T. Kiss, S. Watanabe, T.
Kanai, J. Itatani and S. Shin, Phys. Rev. B 89 (2014) 205114(1-7).

*

16. Robust Protection from Backscattering in the Topological Insulator Bi1.5Sb0.5Te1.7Se1.3: S. Kim, S. Yoshizawa, Y.
Ishida, K. Eto, K. Segawa, Y. Ando, S. Shin and F. Komori, Phys. Rev. Lett. 112 (2014) 136802(1-5).
17. Selective Probing of the OH or OD Stretch Vibration in Liquid Water Using Resonant Inelastic Soft-X-Ray Scattering:
Y. Harada, T. Tokushima, Y. Horikawa, O. Takahashi, H. Niwa, M. Kobayashi, M. Oshima, Y. Senba, H. Ohashi, KT.
Wikfeldt, A. Nilsson, LGM. Pettersson and S. Shin, Phys. Rev. Lett. 111 (2014) 193001(1-5).
18. レーザー光電子分光による分子性導体の電子構造の観測 : 石坂 香子 , 小泉 健二 , 木須 孝幸 , 辛 埴 , 固体物理
49 (2014) 153-162.

ISSP Activity Report 2013

151

*

19. Observing hot carrier distribution in an n-type epitaxial graphene on a SiC substrate: T. Someya, H. Fukidome,
Y. Ishida, R. Yoshida, T. Iimori, R. Yukawa, K. Akikubo, Sh. Yamamoto, S. Yamamoto, T. Yamamoto, T. Kanai, K.
Funakubo, M. Suemitsu, J. Itatani, F. Komori, S. Shin and I. Matsuda, Appl. Phys. Lett. 104 (2014) 161103(1-4).
20.

†*

Solvation dependence of valence electronic states of water diluted in organic solvents probed by soft X-ray spectroscopy: T. Tokushima, Y. Horikawa, O. Takahashi, H. Arai, K. Sadakane, Y. Harada, Y. Takata and S. Shin, Phys. Chem.
Chem. Phys. 16 (2014) 10753.

21. Superconductivity in an electron band just above the Fermi level: possible route to BCS-BEC superconductivity: K.
Okazaki1, Y. Ito, Y. Ota, Y. Kotani, T. Shimojima, T. Kiss, S. Watanabe, C. -T. Chen, S. Niitaka, T. Hanaguri, H. Takagi,
A. Chainani and S. Shin, Sci. Rep. 4 (2014) 4109(1-6).
22. Development of a single-shot CCD-based data acquisition system for time-resolved X-ray photoelectron spectroscopy atan X-ray free-electron laser facility: M. Oura, T. Wagai, A. Chainani, J. Miyawaki, H. Sato, M. Matsunami, R. Eguchi,
T. Kiss, T. Yamaguchi, Y. Nakatani, T. Togashi, T. Katayama, K. Ogawa, M. Yabashi, I. Y. Tanaka, Y. Kohmura, K.
Tamasaku, S. Shin and T. Ishikawa, J.Syn.Rad. 21 (2014) 183-192.
23. The electronic structure of carbonate ion in aqueous solution studied by soft X-ray emission spectroscopy: Y. Horikawa
A. Yoshida, O. Takahashi, H. Araia, T. Tokushima, T. Gejo and S. Shin, J.Mol.Liq 189 (2014) 9-12.
24.

†*

New soft X-ray beamline BL07LSU at SPring-8: S. Yamamoto, Y. Senba, T. Tanaka, H. Ohashi, T. Hirono, H. Kimura,
M. Fujisawa, J. Miyawaki, A. Harasawa, T. Seike, S. Takahashi, N. Nariyama, T. Matsushita, M. Takeuchi, T. Ohata, Y.
Furukawa, K. Takeshita, S. Goto, Y. Harada, S. Shin, H. Kitamura, A. Kakizaki, M. Oshima and I. Matsuda, J Synchrotron Rad 21 (2014) 352-365.

Takahashi group
We have been studying the structure and phase transition of surfaces and interfaces with diffraction techniques. Topologicalinsulators attract much attention due to potential applications such as spintronics and quantum computing. The structure of aBi(001)/Bi2Te3(001) heteroepitaxial film grown on Si(111) was studied with atomic layer resolution by using X-ray crystal
truncation rod scattering in combination with a novel structure analysis method. We revealed the Bi thin film is heavily distorted
due to the interaction with the substrate Bi2Te3, resulting in the topological phase transition of the Bi film. We could also get
quantitative information on the structural inhomogeneity at the interface between both Bi/Bi2Te3 and Bi2Te3/Si(111).
1.

Structure of a Bi/Bi2Te3 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).

2.

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).

3.

†*

4.

Determination of atomic positions in silicene on Ag(111) by low-energy electron diffraction: K. Kawahara, T. Shirasawa, R. Arafune, C. -L. Lin, T. Takahashi, M. Kawai and N. Takagi, Surf. Sci. 623 (2014) 25-28.

Scanning tunneling microscopic and spectroscopic studies on a crystalline silica monolayer epitaxially formedon hexagonal SiC(000-1) surfaces: H. Tochihara, T. Shirasawa, T. Suzuki, T. Miyamachi, T. Kajiwara, K. Yagyu, S.
Yoshizawa, T. Takahashi, S. Tanaka and F. Komori, Appl. Phys. Lett. 104 (2014) 051601(1-4).

5. 「グラフェン／ SiC(000-1) 界面構造の研究」角田 潤一 , 新領域物質系 (2013).
6.

Structure and transport properties 1 of Cu doped Bi2Se3 films: T. Shirasawa, M. Sugiki, T. Hirahara, M. Aitani, T. Shirai,
S. Hasegawa and T. Takahashi, Phys. Rev. B (2014), accepted for publication.

Akiyama group
In 2013, we started experimental and theoretical study on energy conversion efficiencies and sub-cell internal luminescence
yields of tandem solar cells on the basis of a detailed-balance relation. We applied this key relation to the study of intrinsic
radiative lifetime of one-dimensional excitons, and fluorescent radiation thermometry at cryogenic temperatures. We also started
collaboration on the photoluminescence emission of photoexcited undoped GaAs quantum wells induced by an intense singlecycle terahertz pulse. We intensively studied spectral dynamics in short-pulse generation via gain switching of semiconductor
lasers, such as Fabry-Perot GaAs or InGaAs lasers, InGaN VCSELs, and InGaAsP DFB lasers. We developed and characterized double-core-slab-waveguide semiconductor lasers for end optical pumping. We studied the effect of site-directed mutant
luciferase on quantitative green and orange/red emission intensities in firefly bioluminescence, and firefly oxyluciferin inenzymatic environment on the basis of stability monitoring. Intensive studies were made with TD-DFT theoretical calculations
on electronic states for luciferin and oxyluciferin.

152

ISSP Activity Report 2013

1.

Transient hot-carrier optical gain in a gain-switched semiconductor laser: T. Ito, S. Chen, M. Yoshita, T. Mochizuki, C.
Kim, H. Akiyama, L. N. Pfeiffer and K. W. West, Appl. Phys. Lett. 103 (2013) 082117.

2.

†

3.

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).

4.

Dynamics of short-pulse generation via spectral filtering from intensely excited gain-switched 155-μm distributedfeedback laser diodes: S. Chen, M. Yoshita, A. Sato, T. Ito, H. Akiyama and H. Yokoyama, Opt. Express 21 (2013)
10597-10605.

5.

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.

6.

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 6 (2013) 062702.

7.

Impact of Site-Directed Mutant Luciferase on Quantitative Green and Orange/Red Emission Intensities in Firefly Bioluminescence: Y. Wang, H. Akiyama, K. Terakado and T. Nakatsu, Sci. Rep. 3 (2013) 2490.

8.

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, Sci. Rep. 3 (2013)
1941.

9.

Theoretical Study of Firefly Luciferin p K a Values-Relative Absorption Intensity in Aqueous Solutions: M. Hiyama, H.
Akiyama, K. Yamada and N. Koga, Photochem Photobiol 89 (2013) 571.

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, J. Cryst. Growth 378 (2013) 150.

10. Theoretical study for absorption spectra of oxyluciferin in aqueous solutions: M. Hiyama, H. Akiyama, Y. Wang and N.
Koga, Chemical Physics Letters 577 (2013) 121.
11. Large enhancement of the photoluminescence emission of photoexcited undoped GaAs quantum wells induced byan intense single-cycle terahertz pulse: K. Shinokita, H. Hirori, K. Tanaka, T. Mochizuki, C. Kim, H. Akiyama, L. N.
Pfeiffer and K. W. West, Phys. Rev. Lett 111 (2013) 067401.
12. Theoretical Study of Fluorescence Spectra Utilizing the pKa Values of Acids in Their Excited States: M. Hiyama, H.
Akiyama, K. Yamada and N. Koga, Photochem. Photobiol 90 (2013) 35-40.
13. Low Threshold Lasing of GaN-Based VCSELs With Sub-Nanometer Roughness Polishing: W.-J. Liu, S.-Q. Chen, X.-L.
Hu, Z. Liu, J.-Y. Zhang, L.-Y. Ying, X.-Q. Lv, H. Akiyama, Z.-P. Cai and B.-P. Zhang, IEEE Photon. Technol. Lett. 25(2013) 2014.
14. Mode imaging and loss evaluation of semiconductor waveguides: T. Mochizuki, C. Kim, M. Yoshita, T. Nakamura, H.
Akiyama, L. N. Pfeiffer and K. W. West, Rev. Sci. Instrum. 85 (2014) 053109.
15. Robust red-emission spectra and yields in firefly bioluminescence against temperature changes: T. Mochizuki, Y. Wang,
M. Hiyama and H. Akiyama, Appl. Phys. Lett. 104 (2014) 213704.
16. Spectroscopic Study of Firefly Oxyluciferin in an Enzymatic Environment on the Basis of Stability Monitoring: Y.
Wang, Y. Hayamizu and H. Akiyama, J. Phys. Chem. B 118 (2014) 2070–2076.
*

17. Gain-switching dynamics in optically pumped single-mode InGaN vertical-cavity surface-emitting lasers: S. Chen, A.
Asahara, T. Ito, J. Zhang, B. Zhang, T. Suemoto, M. Yoshita and H. Akiyama, Optics Express 22 (2014) 4196-4201.
18. Gain switching of a double-core-waveguide semiconductor laser via traveling-wave optical pumping: H. Nakamae, T.
Nakamura, T. Ito, T. Mochizuki, C. Kim, S. Chen, M. Yoshita and H. Akiyama, Appl. Phys. Express 7 (2014) 062701.
*

19. Spectral dynamics of picosecond gain-switched pulses from nitride-based vertical-cavity surface-emitting lasers: S.
Chen, T. Ito, A. Asahara, M. Yoshita, W. Liu, J. Zhang, B. Zhang, T. Suemoto and H. Akiyama, Sci. Rep. 4 (2014) 4325.
20. Impact of Sub-cell Internal Luminescence Yields on Energy Conversion Efficiencies of Tandem Solar Cells: A designprinciple: L. Zhu, C. Kim, M. Yoshita, S. Chen, S. Sato, T. Mochizuki, H. Akiyama and Y. Kanemitsu, Applied Physics
Letters 104 (2014) 031118.

ISSP Activity Report 2013

153

I. Matsuda group
Developments and experiments of the advanced spectroscopies have been carried out by using vacuum ultraviolet (VUV) andsoft X-rays (SX). At SPring-8 BL07LSU, picosecond-time-resolved SX photoemission spectroscopy measurements have been
carried out to trace relaxation of photo-excited carriers at metal oxide surfaces. Analyses of the carrier life time have directly
revealed the electron-hole recombination process. At Kashiwa campus, dynamics of the Dirac Fermion in a graphene layer
is studied by femtosecond-time-resolved VUV photoemission spectroscopy. The transient electron temperature has indicatedgeneration of the cascade carrier multiplication in the femtosecond-time scale. As a part of the undulator development at
SPring-8 BL07LSU, phase shifters with electromagnetic coils were mechanically adjusted and installed in the electron storage
ring. The phase shifters will be used to make fast polarization switching of the beamline.
1.

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).

2.

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).

3.

Oscillatory relaxation of surface photovoltage on a semiconductor surface: M. Ogawa, S. Yamamoto, R. Yukawa, R.
Hobara, L. -C. Huang, R. -Y. Liu, S. -J. Tang and I. Matsuda, Phys. Rev. B 87 (2013) 235308(1-4).

4.

Relaxations of the surface photovoltage effect on the atomically controlled semiconductor surfaces studied by timeresolved photoemission spectroscopy: M. Ogawa, S. Yamamoto, K. Fujikawa, R. Hobara, R. Yukawa, Sh. Yamamoto, S.
Kitagawa, D. Pierucci, M. G. Silly, C. -H. Lin, R. -Y. Liu, H. Daimon, F. Sirotti, S. -J. Tang and I. Matsuda, Phys. Rev.
B 88 (2013) 165313(1-9).

5.

Structure of silicene on a Ag(111) surface studied by reflection high-energy positron diffraction: Y. Fukaya, I.
Mochizuki, M. Maekawa, K. Wada, T. Hyodo, I. Matsuda and A. Kawasuso, Phys. Rev. B 88 (2013) 205413(1-4).

6.

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.

7.

Anisotropic electronic conduction in metal nanofilms grown on a one-dimensional surface superstructure: N. Nagamura,
R. Hobara, T. Uetake, T. Hirahara, K. Kobayashi, I. Matsuda and S. Hasegawa, Phys. Rev. B 89 (2014) 125415(1-5).

8.

†*

9.

*

Observation of a giant Kerr rotation in a ferromagnetic transition metal by M-edge resonant magneto-optic Kerr effect:
Sh. Yamamoto, M. Taguchi, M. Fujisawa, R. Hobara, S. Yamamoto, K. Yaji, T. Nakamura, K. Fujikawa, R. Yukawa, T.
Togashi, M. Yabashi, M. Tsunoda, S. Shin and I. Matsuda, Phys. Rev. B 89 (2014) 064423(1-6).
Observing hot carrier distribution in an n-type epitaxial graphene on a SiC substrate: T. Someya, H. Fukidome,
Y. Ishida, R. Yoshida, T. Iimori, R. Yukawa, K. Akikubo, Sh. Yamamoto, S. Yamamoto, T. Yamamoto, T. Kanai, K.
Funakubo, M. Suemitsu, J. Itatani, F. Komori, S. Shin and I. Matsuda, Appl. Phys. Lett. 104 (2014) 161103(1-4).

10. Non-linear kinetic model for oscillatory relaxation of the photovoltage effect on a Si(111)7x7 surface: M. Ogawa, R. -Y.
Liu, C. -H. Lin, S. Yamamoto, R. Yukawa, R. Hobara, S. -J. Tang and I. Matsuda, Surf. Sci. 624 (2014) 70-75.
11. 反射高速陽電子回折（RHEPD）
による Ag(111) 表面上のシリセンの構造決定 : 深谷 有喜 , 望月 出海 , 前川 雅樹 ,和田 健 , 兵頭 俊夫 , 松田 巌 , 河裾 厚男 , PF News 32 (2014) 10-14.
12. 表面電子化合物 : 松田 巌 , 深谷 有喜 , PF News 31 (2014) 33-37.
†

13. Electron–Hole Recombination Time at TiO2 Single-Crystal Surfaces: Influence of Surface Band Bending: K. Ozawa,M. Emori, S. Yamamoto, R. Yukawa, S. Yamamoto, R. Hobara, K. Fujikawa, H. Sakama and I. Matsuda, J. Phys. Chem.
Lett. 5 (2014) 1953.
14. Rashba effects within the space charge layer of a semiconductor: C.-H. Lin, T.-R. Chang, Ro. -Ya. Liu, C.-M. Cheng,
K.-D. Tsuei, H. -T. Jeng, C.-Y. Mou, I. Matsuda and S. -J. Tang, New. J. Phys. 16 (2014) 045003(1-12).
15.

†*

New soft X-ray beamline BL07LSU at SPring-8: S. Yamamoto, Y. Senba, T. Tanaka, H. Ohashi, T. Hirono, H. Kimura,
M. Fujisawa, J. Miyawaki, A. Harasawa, T. Seike, S. Takahashi, N. Nariyama, T. Matsushita, M. Takeuchi, T. Ohata, Y.
Furukawa, K. Takeshita, S. Goto, Y. Harada, S. Shin, H. Kitamura, A. Kakizaki, M. Oshima and I. Matsuda, J Synchrotron Rad 21 (2014) 352-365.

16. 量子井戸 : 松田 巌 , 「表面科学会教科書シリーズ 62013), 88.

154

ISSP Activity Report 2013

問題と解説で学ぶ表面科学」, 松井文彦 , ( 共立出版 ,Kobayashi group
We have demonstrated a precision spectroscopy in VUV region by using VUV frequency comb.
1.

vuv frequency-comb spectroscopy of atomic xenon: A. Ozawa and Y. Kobayashi, Phys. Rev. A 87 (2013) 022507(1-4).

2.

6-GHz, Kerr-lens mode-locked Yb:Lu2O3 ceramic laser for comb-resolved broadband spectroscopy: M. Endo, A. Ozawa
and Y. Kobayashi, Opt. Lett. 38 (2013) 4502.

3.

10-MHz, Yb-fiber chirped-pulse amplifier system with large-scale transmission gratings: Y. Kobayashi, N. Hirayama, A.
Ozawa, T. Sukegawa, T. Seki, Y. Kuramoto and S. Watanabe, Optics Express 21 (2013) 12865.

4.

Static FBG strain sensor with high resolution and large dynamic range by dual-comb spectroscopy: N. Kuse, A. Ozawa
and Y. Kobayashi, Optics Express 21 (2013) 11141.

5.

光源としての光コム (2)6.

紫外光周波数コム発生と精密分光への応用 : 小澤 陽 , 小林 洋平 , OplusE 35 (2013) 1132.

7.

デュアルコム分光 FT-IR にかわる高速広帯域精密分光 : 久世 直也 , 小澤 陽 , 小林 洋平 , 日本物理学会 69 (2014)
29.

VUV 領域および高繰り返しコム : 小林 洋平 , 分光研究 62 (2013) 185.

Itatani group
The Itatani group worked mainly on (i) the generation of soft-X-ray high harmonics using a BIBO-based optical parametricchirped pulse amplifier at 1.6 µm and (ii) the generation of intense THz pulses and their application to coherent control of small
molecules. Regarding the BIBO-based source, we measured high harmonic spectra up to 330 eV with various experimental
parameters such as backing pressures and carrier-envelope phases of the driver pulses. We observed clear CEP-dependences
up to the backing pressure of 3 atm, which showed a potential to increase the photon flux of soft-X-ray attosecond pulses. As
for the THz generation, we controlled the rotational wavepackets in jet-cooled HBr molecules to achieve molecular orientation (alignment with head-and-tail discrimination). We observed clear signature of molecular orientation by a newly-developed
velocity-map imaging apparatus. This is the first clear demonstration of molecular orientation by using intense THz pulses.
1.

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2.

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3.

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4.

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Orientation of jet-cooled polar molecules with an intense single-cycle THz pulse: K. Kitano, N. Ishii, N. Kanda, Y.
Matsumoto, T. Kanai, M. Kuwata-Gonokami and J. Itatani, Phys. Rev. A 88 (2013) 061405.
Ultrafast photoinduced transition of an insulating VO2 thin film into a nonrutile metallic state: R. Yoshida, T.
Yamamoto, Y. Ishida, H. Nagao, T. Otsuka, K. Saeki, Y. Muraoka, R. Eguchi, K. Ishizaka, T. Kiss, S. Watanabe, T.
Kanai, J. Itatani and S. Shin, Phys. Rev. B 89 (2014) 205114(1-7).
Observing hot carrier distribution in an n-type epitaxial graphene on a SiC substrate: T. Someya, H. Fukidome,
Y. Ishida, R. Yoshida, T. Iimori, R. Yukawa, K. Akikubo, Sh. Yamamoto, S. Yamamoto, T. Yamamoto, T. Kanai, K.
Funakubo, M. Suemitsu, J. Itatani, F. Komori, S. Shin and I. Matsuda, Appl. Phys. Lett. 104 (2014) 161103(1-4).
Carrier-envelope phase-dependent high harmonic generation in the water window using few-cycle infrared pulses: N.
Ishii, K. Kaneshima, K. Kitano, T. Kanai, S. Watanabe and J. Itatani, Nat. Commun. 5 (2014) 3331.

Harada group
1) Operando soft X-ray RIXS spectroscopy for electronic structure analysis of catalytic reactions:: We have developed a novel
electrochemical cell system for operando soft X-ray emission spectroscopy for analysis of catalytic reactions. We have applied
the system to identify the active site for oxygen reduction reaction in polymer electrolyte fuel cells cathode catalysts. We haveobserved the electronic structure of iron in an iron phthalocyanine-based cathode catalyst under various working conditions
and found that an oxidized iron site exists and is active for oxygen adsorption, which is not expected from ex situ results inwhich a metallic iron site dominates. 2) Development of the soft X-ray RIXS system around sample manipulation:: In order toextend the public use of the soft X-ray emission spectroscopy station we have realized precise temperature control of liquids inothe range of -5 ∼ 80 C within ±1K accuracy using an originally developed thermal shielding, and surface cleaning by neutralized ion sputtering and annealing at more than 1000 K by electron bombardment. We also have implemented a liq. He sample
cooling system down to 35 K. All these systems are now in operation and open to public. 3) Pioneering work on soft X-ray
vibrational RIXS of liquids: Ultrahigh resolution resonant inelastic soft X-ray scattering was applied to observe multiple vibrational excitations in liquid water. By tuning X-ray excitation energy to a particular structure in the X-ray absorption spectrum
we have successfully obtained vibrational frequencies well correlate with the OH stretching mode of a particular configurationof water. This enables element- and site-specific vibrational spectroscopy that is not accessible by the conventional IR or Raman
spectroscopy.

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155

1.

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2.

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3.

Probing carbon edge exposure of iron phthalocyanine-based oxygen reduction catalysts by soft X-ray absorption
spectroscopy: H. Niwa, M. Saito, M. Kobayashi, Y. Harada, M. Oshima, S. Moriya, K. Matsubayashi, Y. Nabae, S.
Kuroki, T. Ikeda, K. Terakura, J.-I. Ozaki and S. Miyata, Journal of Power Sources 223 (2013) 30-35.

4.

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5.

Operando soft X-ray emission spectroscopy of iron phthalocyanine-based oxygen reduction catalysts: H. Niwa, H.
Kiuchi, J. Miyawaki, Y. Harada, M. Oshima, Y. Nabae and T. Aoki, Electrochemistry Communications 35 (2013) 57-60.

6.

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7.

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8.

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9.

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Selective Probing of the OH or OD Stretch Vibration in Liquid Water Using Resonant Inelastic Soft-X-Ray Scattering:
Y. Harada, T. Tokushima, Y. Horikawa, O. Takahashi, H. Niwa, M. Kobayashi, M. Oshima, Y. Senba, H. Ohashi, KT.
Wikfeldt, A. Nilsson, LGM. Pettersson and S. Shin, Phys. Rev. Lett. 111 (2013) 193001(1-5).
Resonant inelastic X-ray scattering of liquid water: A. Nilsson, T. Tokushima, Y. Horikawa, Y. Harada, M. P. Ljungberg,
S. Shin and L. G. M. Pettersson, J. Electron Spectrosc. Relat. Phenom. 188 (2013) 84-100.

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.

Unveiling the impurity band induced ferromagnetism in the magnetic semiconductor (Ga,Mn)As: M. Kobayashi,
I. Muneta, Y. Takeda, Y. Harada, A. Fujimori, J. Krempaský, T. Schmitt, S. Ohya, M. Tanaka, M. Oshima and V. N.
Strocov, Phys. Rev. B 89 (2014) 205204(1-8).
Electronic Excitations of a Magnetic Impurity State in the Diluted Magnetic Semiconductor (Ga,Mn)As: M.
Kobayashi, H. Niwa, Y. Takeda, A. Fujimori, Y. Senba, H. Ohashi, A. Tanaka, S. Ohya, P. N. Hai, M. Tanaka, Y. Haradaand M. Oshima, Phys. Rev. Lett. 112 (2014) 107203(1-7).
Solvation dependence of valence electronic states of water diluted in organic solvents probed by soft X-ray spectroscopy: T. Tokushima, Y. Horikawa, O. Takahashi, H. Arai, K. Sadakane, Y. Harada, Y. Takata and S. Shin, Phys. Chem.
Chem. Phys. 16 (2014) 10753.
New soft X-ray beamline BL07LSU at SPring-8: S. Yamamoto, Y. Senba, T. Tanaka, H. Ohashi, T. Hirono, H. Kimura,
M. Fujisawa, J. Miyawaki, A. Harasawa, T. Seike, S. Takahashi, N. Nariyama, T. Matsushita, M. Takeuchi, T. Ohata, Y.
Furukawa, K. Takeshita, S. Goto, Y. Harada, S. Shin, H. Kitamura, A. Kakizaki, M. Oshima and I. Matsuda, J Synchrotron Rad 21 (2014) 352-365.

†

10. Iron-Nitrogen Coordination in Modified Graphene Catalyzes a Four-Electron-Transfer Oxygen Reduction Reaction: K.
Kamiya, H. Koshikawa, H. Kiuchi, Y. Harada, M. Oshima, K. Hashimoto and S. Nakanishi, ChemElectroChem (2014),
accepted for publication.

Wadati group
Our main experimental techniques are synchrotron-based x-ray spectroscopy and scattering. We studied the orbital and magnetic
phase transitions in Pr0.5Ca0.5MnO3 epitaxial thin films by resonant soft x-ray scattering and observed three phase transitions,one of which is absent in bulk Pr0.5Ca0.5MnO3. We also studied the valence of Bi in Bi-based new-type superconductors by
x-ray absorption spectroscopy and obtained evidence for the scenario of electron doping for the emergence of superconductivity.
1.

Antiferromagnetic Order of the Co2+ High-Spin State with a Large Orbital Angular Momentum in La1.5Ca0.5CoO4: J.
Okamoto, H. Nakao, Y. Yamasaki, H. Wadati, A. Tanaka, M. Kubota, K. Horigane, Y. Murakami and K. Yamada, J. Phys.
Soc. Jpn. 83 (2014) 044705.

2.

Insulator-to-Superconductor Transition upon Electron Doping in a BiS2 -Based Superconductor Sr1−xLaxFBiS2: H.
Sakai, D. Kotajima, K. Saito, H. Wadati, Y. Wakisaka, M. Mizumaki, K. Nitta, Y. Tokura and S. Ishiwata, J. Phys. Soc.
Jpn. 83 (2014) 014709.

3.

Revealing orbital and magnetic phase transitions in Pr0.5Ca0.5MnO3 epitaxial thin films by resonant soft x-ray scattering:
H. Wadati, J. Geck, E. Schierle, R. Sutarto, F. He, D. G. Hawthorn, M. Nakamura, M. Kawasaki, Y. Tokura and G. A.
Sawatzky, New J. Phys. 16 (2014) 033006.

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ISSP Activity Report 2013

Kondo group
We use angle-resolved photoemission spectroscopy (ARPES) with ultrahigh energy resolution, achieved by using laser
photon source, and study the nonconventional superconductors, heavy fermions, strongly correlated systems, topologicalquantum phases, and quantum well states. The main findings in 2013 are as follows: (1) Formation of Gapless Fermi Arcs andFingerprints of Order in the Pseudogap State of Cuprate Superconductors. (2) Anomalous Dressing of Dirac Fermions in the
Topological Surface State. (3) Significant doping Variation of the Nodal Low-Energy Feature of Superconducting Bi2Sr2CuO6+δ
(Bi2201) crystals.
1.

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2.

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3.

Formation of Gapless Fermi Arcs and Fingerprints of Order in the Pseudogap State of Cuprate Superconductors.: T.
Kondo, A. D. Palczewski, Y. Hamaya, T. Takeuchi, J. S. Wen, Z. J. Xu, G. Gu and A. Kaminski, Phys. Rev. Lett. 111(2013) 157003(1-5).

4.

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5.

Fermi Surface and Pseudogap Evolution in a Cuprate Superconductor.: Y. He, Y. Yin, M. Zech, A. Soumyanarayanan, M.
M. Yee, T. Williams, M. C. Boyer, K. Chatterjee, W. D. Wise, I. Zeljkovic, T. Kondo, T. Takeuchi, H. Ikuta, P. Mistark,
R. S. Markiewicz, A. Bansil, S. Sachdev, E. W. Hudson and J. E. Hoffman, Science 344 (2014) 608-611.

Anomalous Doping Variation of the Nodal Low-Energy Feature of Superconducting (Bi,Pb)2(Sr, La)2CuO6+δ Crystals
Revealed by Laser-Based Angle-Resolved Photoemission Spectroscopy: T. Kondo, Y. Nakashima, W. Malaeb, Y. Ishida,
Y. Hamaya, T. Takeuchi and S. Shin, Phys. Rev. Lett. 110 (2013) 217006(1-5).
Anomalous Dressing of Dirac Fermions in the Topological Surface State of Bi2Se3, Bi2Te3, and Cu-Doped Bi2Se3: T.
Kondo, Y. Nakashima, Y. Ota, Y. Ishida, W. Malaeb, K. Okazaki, S. Shin, M. Kriener, S. Sasaki, K. Segawa and Y. Ando,Phys. Rev. Lett. 110 (2013) 217601(1-5).

Surface electronic structure of the topological Kondo-insulator candidate correlated electron system SmB6: M.
Neupane, N. Alidoust, S. -Y. Xu, T. Kondo, Y. Ishida, D. J. Kim, C. Liu, I. Belopolski, Y. J. Jo, T. -R. Chang, H. -T. Jeng,
T. Durakiewicz, L. Balicas, H. Lin, A. Bansil, S. Shin, Z. Fisk and M. Z. Hasan, Nat. Commun. 4 (2013) 2991(1-7).

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157

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