2015Ⓒ 2016 The Institute for Solid State Physics, The University of Tokyo

Activity Report
2015

Preface		1

Research Highlights		

2 - 31

Joint Research Highlights

32 - 43

Progress of Facilities		

44 - 51

Conferences and Workshops

52 - 61

Subjects of Joint Research

62 - 155

Publications

156 - 190

The Institute for Solid State Physics (ISSP), The University of Tokyo
Address

5-1-5 Kashiwanoha, Kashiwa, Chiba, 277-8581, JapanPhone+81-4-7136-3207

Home Page

http://www.u-tokyo.ac.jp

Preface

We are pleased to present the annual ISSP Activity Report for
the academic year 2015. 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, as well as their theoretical understanding,by advanced and original methods are at the core of modern condensed
matter science. Such activities are being conducted by relatively small independent groups at ISSP and theircollaborators. At the same time, importance of large experimental and computational facilities in materials
science has been rapidly increasing in recent years. An important mission of ISSP is active participation in thedevelopment and operation of some of those large facilities that are difficult to maintain for typical university
faculties. Notable achievements in this direction are summarized below.
(1) ISSP has been operating supercomputers dedicated to materials science. In addition, the Center ofComputational Materials Science provides technical supports to facilitate use of massively parallel computational resources such as the K and the post K computers. (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 external users access to advanced spectroscopies that use quantum beams such as neutron andsynchrotron light sources. It is a pity for the neutron scattering society that the JRR-3 reactor at Tokai has been
shut down after the earthquake in 2011 but we are expecting reopening in near future. The pulsed neutron
spectrometer at J-PARC developed jointly by ISSP and KEK is now in operation. At the Laser and Synchrotron Research Center, we explore frontier of advanced spectroscopy in ultraviolet and soft X-ray region by
combining high power laser being developed in Kashiwa and synchrotron beamline installed in SPring-8.

June, 2016

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

ISSP Activity Report 20151

Research Highlights
Probing a Horizontal Line Nodein the Heavy-Fermion Superconductor
URu2Si2 by Angle-Resolved Heat
Capacity Measurements
Sakakibara Group
Identification of the gap structure of anisotropic superconductors (SCs) has been the subject of intensive study
over many years. Among various experimental techniques,
the heat capacity (Cϕ) measurement in a rotating magnetic
field (H) is quite useful because of its wide applicability.
This technique is based on the fact that the field-induced
zero-energy density of states, N(E=0), in the superconducting
mixed state of a nodal SC is field and its orientation dependent. In the case of a tetragonal SC with vertical line nodes,
in particular, Cϕ shows an angular oscillation when H isrotated in the basal plane, with Cϕ minima occurring along
the nodal directions.
To probe the horizontal line node, however, is not so easy.
When H is rotated in the ac plane of the tetragonal crystal,
the polar angle (θ) variation of the heat capacity Cθ(H) is
expected to exhibit a twofold oscillation reflecting the gap
structure. It should be reminded, however, that because of
the tetragonal symmetry of the lattice, the upper critical field
Hc2 would have a substantial twofold anisotropy in the acplane and give rise to a strong twofold background in Cθ(H).
Hence, the simple argument—the direction of minima inCθ(H) corresponds to the nodal direction—does not hold.
Nevertheless, because the θ variation of the field-induced
N(E=0) would exhibit local minima as the direction of H
passes through the horizontal line node, fine structures may
appear in the twofold oscillation of C (H). We applied thisθ
technique to the heavy fermion superconductor URu2Si2 [1],Fig. 1. Polar angle dependence of C/T of URu2Si2 measured at 0.2 K invarious magnetic fields ranging from 0.07 to 3 T.

2

ISSP Activity Report 2015

Fig. 2. (a) Field dependence of N(E=0) for B||z and B||x, obtained by
microscopic calculations assuming the kz(kx+iky) gap. (b) Calculated
polar angle variation of N(E=0) at several fields. (c) Angle-resolved
density of states, Nk(0), mapped on the spherical Fermi surface. The
magnetic field is rotated in the xz plane.

whose gap structure is suggested by previous experiments tobe a chiral d-wave, kz(kx+iky), having a horizontal line nodeand polar point nodes [2,3].
Figure 1 shows the measured results of Cθ(H) obtainedby rotating H within the ac plane. At high fields, the large
twofold oscillation is observed, reflecting the anisotropy of
Hc2 predominantly due to the anisotropic Pauli paramagnetic
effect. In the low-field region below 0.15 T, no remarkable anomaly was detected in C(θ): the data can be fitted
by a simple twofold function expected for an effective massmodel. By contrast, a striking feature is found in C(θ) in theregion 0.2~1.5 T; a shoulder-like anomaly appears at aroundθ~45º. With increasing H, this anomaly slightly moves to thehigher θ side.
We calculate the θ dependence of the N(E=0) on the basisof the microscopic Eilenberger theory assuming the gap
symmetry of kz(kx+iky) [inset of Fig. 2(a)] and a single-band
spherical Fermi surface. For simplicity, the Pauli-paramagnetic effect and the anisotropy of the Fermi velocity are nottaken into account. Figure 2(a) shows the field dependence ofN(E=0) at θ=0 (H||z) and 90º. For both field directions, H1/2
dependence is obtained reflecting the line node. Note that asmall anisotropy appears in N(E = 0).
In Fig. 2(b), N(E=0) is plotted as a function of θ at several
fields. The calculated result at a low field B=0.03 can reproduce the features observed in the present experiment, i.e. theshoulder-like anomaly and the dip structure in C(θ) observed
at moderate fields. With increasing B, a sharp dip develops

at θ=0 and then the anisotropy in N(E=0) is reversed aboveB ∼ 0.1, reflecting the Hc2 anisotropy. The dip at θ=0 andthe reversal of the C(θ) anisotropy in the high-field region,
demonstrated in Fig. 2(b), were not detected in the experiment because the actual Hc2 anisotropy depends on the strong
Pauli-paramagnetic effect. Figure 2(c) shows the momentumresolved density of states, Nk(0), mapped on the spherical
Fermi surface. The field B=0.03 is rotated in the xz plane.
When B||z (θ=0), strong quasiparticle excitations occur on
the line node as indicated by a red color. As B rotates towards
x direction, the quasiparticle excitations at the region ky=0
are strongly reduced, resulting in a decrease in N(E=0). Thiseffects account the shoulder-like feature in C(θ) near 45º.
The present results indicate that a horizontal line node
exists in URu2Si2. Note that among the possible gap structures for a tetragonal even parity SC, only kz(kx+iky) has thehorizontal line node. Thus, the pairing symmetry of URu2Si2
is likely to be the chiral d wave [1].
References[1] S. Kittaka et al., J. Phys. Soc. Jpn. 85, 033704 (2016).
[2] Y. Kasahara, T. Iwasawa, H. Shishido, T. Shibauchi, K. Behnia,
Y. Haga, T. D. Matsuda, Y. Onuki, M. Siglist, and Y. Matsuda, Phys.
Rev. Lett. 99, 116402 (2007).
[3] K. Yano, T. Sakakibara, T. Tayama, M. Yokoyama, H. Amitsuka,
Y. Homma, P. Miranović, M. Ichioka, Y. Tsutsumi, and K. Machida,Phys. Rev. Lett. 100, 017004 (2008).

part has an anionic symmetric [O..H..O]¯ structure witha short O..O distance (2.455(3) Å), whose H-bondedhydrogen occupies the inversion center of the H-bondedunit. Thus, two Cat-EDO-TTF skeletons in the unit are
crystallographically equivalent to each other (Fig. 1). In thepresent EDO-TTF is +1 state, as estimated from empiricalbond length analysis of the TTF skeleton due to the inclusion of the BF4¯ anion in the present system to maintainthe charge neutrality of the overall crystal. As a result,the EDO-TFF system is expected to have a larger chargepolarization within the H-bonded unit, [(EDO-TTF+-Cat)[O..H..O]¯-(Cat-TTF+-EDO)]+ The present planar H-bonded
molecular units form a sheet-like structure including the
BF4¯ anions, which is further stacked to construct a so-called
β’-type two-dimensional conducting layer composed of
Cat-EDOTTF + molecules. Thus, the high temperaturephase (HTP: high temperature phase, 220 K < T) crystal
can be called β’-[H3(Cat-EDO-TTF)2]BF4. As shown by
red dashed circles in Fig. 1, the Cat-EDO-TTF+ molecules
are π-dimerized in a head-to-tail manner with an interplanar distance of 3.41 Å, which is much shorter than thatbetween the π-dimers (3.60 Å). Actually, the calculatedtransfer integral within the π-dimer (134 meV, denoted by

Authors
S. Kittaka, Y. Shimizu, T. Sakakibara, Y. Hagaa, E. Yamamotoa,
Y. Onukia,b, Y. Tsutsumic,d, T. Nomotoe, H. Ikedaf, K. Machidafa
JAEAb
University of RyukyucUniversity of Tokyo
d
RIKEN
e
Kyoto University
fRitsumeikan University

Solid-Solid Interconversion Coupled by
Jahn-Teller-Like Distortion and Bond-Orderfor the Hydrogen-Bonded Molecular
Conductor β'-[H3(Cat-EDO-TTF)2]BF4Mori GroupIn the field of molecular functional materials,“π-electronic properties” of (super)conductors and anti/ferromagnets and “protonic properties” of anti/ferro-electrics
and proton conductor have been investigated separately andindependently. Our aim is to couple “π-electronic properties” and “protonic properties” and to create novel “protonand π-electron coupled (PEC) properties and functionalities”.
Recently, in the catechol-fused tetrathiafulvalene (TTF)system [1], the metallic state of purely organic single-unit
crystal of κ-H3(Cat-EDT-ST)2 [2], the quantum spin liquidstate of κ-H3(Cat-EDT-TTF)2 [3], and electronic switching
induced by deuterium and charge transfer of κ-D3(CatEDT-TTF) 2 and κ-D 3 (Cat-EDT-ST) 2 [4,5] have been
unveiled. Here we report unprecedented solid-solid interconversion coupled by Jahn-Teller-like distortion of hydrogenbond (H-bond) unit and bond-order for the molecular
conductor β'-[H3(Cat-EDO-TTF)2]BF4 [6].
The present crystal is composed of an H-bonded unit
structure [H3(Cat-EDO-TTF)2]+ and an additional BF4¯anion (positionally disordered), to give a chemical formulaof [H3(Cat-EDO-TTF)2]BF4. In addition, this H-bond unit,[H3(Cat-EDO-TTF)2]+, is highly planar, and the H-bondFig. 1. The solid-solid interconversion from β’- (220 K < T) toα-[H3(Cat-EDO-TTF)2]BF4 (T < 220 K) is originated from the interplayof geometric Jahn-Teller-like distortion (from 180˚ to 147˚) of the intrahydrogen-bond-unit [H3(Cat-EDO-TTF)2]¯ and magnetic stabilizationof Cat-EDO-TTF dimers, where the paramagnetic-to-non-magnetic andlow-to-high resistivity transition occurs. The solid line in the temperature dependence of χMT is reproduced by the singlet–triplet (S–T)
dimer model with a very strong antiferromagnetic exchange coupling of
2J/kB = -1700 K.

ISSP Activity Report 20153

a in Fig. 1) is much larger than that between the π-dimers(4.3 meV, denoted by b), suggesting that a very strong dimerization occurs. This type of conductive molecular material
composed of a mono-oxidized TTF+ derivative is very rare
due to the strong intermolecular Coulomb repulsion. In thepresent system, however, the head-to-tail arrangement of thesignificantly charge-polarized or zwitterionic-like Cat-EDOTTF skeletons within and between the π-dimer(s) seems toeffectively decrease the intermolecular Coulomb repulsions,
to allow the construction of the infinite π–π stacking. Also,
between the columns, there are some effective intermolecularinteractions (c–e in Fig. 1).
The phase transition occurs around 220 K. Interestingly, upon the transition, the H-bonded unit becomes bent
from 180° to 147° at one of the H-bonded oxygen atoms
in the H-bond (Fig. 1), which results in desymmetrizationof the H-bonded unit: two crystallographically equivalent
Cat-EDO-TTF+ skeletons in the HTP (A and A’ molecules)
become non-equivalent (A and B molecules), and, simultaneously, the symmetric [O..H..O]‒ H-bond is also desymmetrized to an [O–H..O]‒ fashion with the O–H and O..H
distances of 1.17(4) Å and 1.31(4) Å, respectively. The
HOMO energy levels of TTF skeletons are stabilized from
-9.310 eV (HTP) to -9.322 and -9.335 eV (LTP: low temperature phase, T < 220 K) by extended Hückel calculation
based upon crystal structure analyses. The bent of H-bondunit and stabilization of total energy from the HTP to the
LTP are noted to be the Jahn-Teller-like distortion of H-bondunit. Curiously, however, the valence on the TTF skeletons in
the LTP is fundamentally unchanged from that in the HTP, tomaintain the +1 state, as revealed by the bond length analysis
and DFT calculation. Also, the BF4 anions are still positionally disordered, however, notably the molecular arrangementof the Cat-EDO-TTF+ skeletons in the conducting layer isdramatically changed: the β’-type arrangement in the HTP,
composed of a single kind of π-stack inclined in the same
direction, transforms to a so-called α-type molecular arrangement in the LTP, where two types of the π-stacking columns
with opposite inclinations (columns A and B) are alternately
arranged. In this α-[H3(Cat-EDO-TTF)2]BF4 crystal, thetilt angle between the adjacent Cat-EDO-TTF+ skeletons in
the columns A and B corresponds to the bend angle of the
H-bonded unit, which thus suggests that this unusual molecular arrangement change is based on the transformation of
the H-bonded unit between the planar and bent forms.
Temperature dependence of the electrical resistivity andmagnetic susceptibility (Fig. 1) of this H-bonded-unit-based
conductor [H3(Cat-EDO-TTF)2]BF4 was measured on the
single crystal and polycrystalline sample, respectively. In
both the measurements, we observed the phase interconversion between the high-temperature β’-[H3(Cat-EDO-TTF)2]
BF 4 and the low-temperature α-[H 3 (Cat-EDO-TTF) 2 ]BF4, in the almost same temperature region. In the resistivity measurement, the resistivity at room temperature is
50 ohm cm and a semiconductor–semiconductor transition
with an abrupt change in ρ was observed at around 210 K,
which leads to an increase in the activation energy from
135 meV in the HTP to 165 meV in the LTP. This loweringof the transport property is due to the enhancement of the
π-dimerization and the decrease of the inter-columnar
interaction, which make the conductive π-electrons further
localized within the π-dimer. The magnetic properties arealso significantly altered around the anomaly at 220–230 K(Fig. 1): after its gradual decrease from 300 K, the χMT value
rapidly dropped at 230 K and recorded 0.0 emu mol-1 K

4

ISSP Activity Report 2015

below 220 K, indicating that the LTP is a non-magnetic state.
Also this temperature dependence was reversibly observed.
We note here that the χMT value at 300 K (0.047 emu
mol-1 K) is much smaller than the expected value for
non-interacting two S = 1/2 spins (0.75 emu mol-1 K),suggesting the occurrence of a strong antiferromagnetic
interaction between the S = 1/2 radical cationic TTF+ skeletons in the π-dimer. Actually, the temperature dependenceof χMT in the HTP (T > 220 K) was well reproduced by thesinglet–triplet (S–T) dimer model with a very strong antiferromagnetic exchange coupling of 2J/kB = -1700 K (solid line
in Fig. 1).
In summary, we have discovered the novel proton-π-electron
coupled (PEC) conductor, β’-[H3(Cat-EDO-TTF)2]BF4, withthe solid-solid interconversion from β’- to α-phase accompanying resistivity and magnetic switching of the BF4 complex.
This transition is derived from geometric Jahn-Tellerlike distortion from planar to bent form of the composedhydrogen-bonded unit and the magnetic stabilization towards
bond-order derived from spin singlet state with stronger
dimerization of molecules. Further systematic tuning of
proton and π-electron dynamics in this coupled system will
afford novel chemical and physical functionalities beyond theframework of π-electronics so far.
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).
[4] A. Ueda, S. Yamada, T. Isono, H. Kamo, A. Nakao, R. Kumai,
H. Nakao, Y. Murakami, K. Yamamoto, Y. Nishio, and H. Mori, J. Am.
Chem. Soc. 136 (34), 12184 (2014).
[5] A. Ueda, A. Hatakeyama, M. Enomoto, R. Kumai, Y. Murakami,
and H. Mori, Chem. Eur. J. 21, 15020 (2015).
[6] J. Yoshida, A. Ueda, A. Nakao, R. Kumai, H. Nakao, Y. Murakami,
and H. Mori, Chem. Commun. 55, 15557 (2014).
Authors
J. Yoshida, A. Ueda, A. Nakaoa, R. Kumaib, H. Nakaob, Y. Murakamib,and H. MoriaComprehensive Research Organization for Science and SocietybInstitute of Materials Structure Science, High Energy Accelerator
Research Organization

Large Anomalous Hall Effect in
the Non-Collinear Antiferromagnet
Mn3Sn at Room Temperature
Nakatsuji GroupIn ferromagnetic (FM) conductors, an electric current
may induce a transverse voltage drop in zero appliedmagnetic field: this anomalous Hall effect is observed to
be proportional to magnetization M, and thus is not usuallyseen in antiferromagnets in zero field. Recent developmentsin theory and experiment have provided a framework forunderstanding the anomalous Hall effect using Berry-phase
concepts [1], and this perspective has led to predictions that,
under certain conditions, a large anomalous Hall effect may
appear in spin liquids and antiferromagnets without net spin
magnetization [2]. Although such a spontaneous Hall effecthas now been observed in a spin liquid state [3], a zero-fieldanomalous Hall effect has hitherto not been reported forFig. 1. (a) The crystallographic unit cell of Mn3Sn. (b) An individual
ab-plane of Mn3Sn. Mn moments form an inverse triangular spin structure. Each Mn moment has the local easy-axis parallel to the in-plane
direction towards its nearest-neighbor Sn sites.

antiferromagnets.
Mn 3Sn is a hexagonal antiferromagnet (AFM) thatexhibits non-collinear ordering of Mn magnetic moments at
the Néel temperature of TN ~ 420 K [4]. The system has a
Ni3Sn-type structure with space group P63/mmc (Fig. 1(a)).
The basal plane projection of the each ab-plane consists ofa slightly distorted kagome lattice of Mn, and the associatedgeometrical frustration manifests itself as an inverse triangular spin structure that carries a very small net FM momentof ~ 2 mµB/Mn (Fig. 1(b)) [4]. All Mn moments lie in theab-plane and form a chiral spin texture with an opposite
vector chirality to the usual 120° structure. This spin configuration has an orthorhombic symmetry, and only one of thethree moments in each Mn triangle is parallel to the local
easy-axis. Thus, the canting of the other two spins towards
the local easy-axis is considered to be the origin of the weak
FM moment [4].
We have carried out detailed transport measurements
using high-quality single crystals of Mn3Sn to reveal theproperties associated with the non-collinear antiferromagnetic (AF) ordering [5]. Figure 2(a) presents the field
B dependence of the Hall resistivity, ρH(B) at 300 K for
B || [2-1-10]. ρH(B) exhibits a clear hysteresis loop with asizable jump of |ΔρH| ~ 6 μΩcm. This is strikingly large for
an AFM, and is larger than those found in elemental transition metal ferromagnets (FMs) such as Fe, Co and Ni [1, 6].
Notably, the sign change occurs at a small field of ~ 300 Oe.
In contrast, the longitudinal resistivity ρ(B) remains constant
except for spikes at the critical fields where the Hall resistivity jumps (Fig. 2(a)). Correspondingly, the Hall conductivity, σH = − ρH/ρ2, for in-plane fields along both [2-1-10]
and [01-10] shows a large jump and narrow hysteresis. For
instance, with B || [01-10], σH has large values near zero
field, ~ 20 Ω−1cm−1 at 300 K and nearly 100 Ω−1cm−1 at 100
K. This is again quite large for an AFM and comparable tothose values found in FM metals [1, 7]. On the other hand,the Hall signal for B || [0001] shows no hysteresis but only alinear field dependence.

Fig. 2. (a) Field dependence of the Hall resistivity ρH and the longitudinal resistivity ρ at 300 K in the magnetic field B || [2-1-10] with theelectric current I || [01-10]. (b) Field dependence of the non-collinear
AF ordering driven Hall resistivity ρHAF = ρH − R0B − Rsµ0M at 300 K.

If we label the additional term originating from thenon-collinear AF ordering as ρHAF, the Hall resistivity in
Mn3Sn can be described by ρH = R0B + Rsµ0M +ρHAF.
By subtracting R0B and Rsµ0M from ρH, we find that ρHAF
is nearly independent of B or M, unlike what is found inFMs, as shown in Fig. 2(b). With the reversal of a small
applied in-plane field, ρHAF changes sign, corresponding to
the rotation of the staggered moments of the non-collinear
spin structure [4]. Thus, the large AHE, ρHAF, must havea distinct AF-driven origin. This soft response of the large
anomalous Hall effect in an AFM could be useful for various
applications including spintronics—for example, to develop
a memory device that produces almost no perturbing strayfields.
Finally, we note that the present exceptionally large
AHE found in an AFM with vanishingly small magnetization indicates that a large fictitious field due to Berry phasemust exist in momentum space, and is expected to generatevarious effects including orbital ferromagnetism and the spin
Hall effect. Exploration of such effects and their externalfield control are suitable subjects for future studies.
References[1] N. Nagaosa et al., Rev. Mod. Phys. 82, 1539 (2010).
[2] R. Shindou and N. Nagaosa, Phys. Rev. Lett. 87, 116801 (2001);
H. Chen et al., Phys. Rev. Lett. 112, 017205 (2014); J. Kübler and
C. Felser, Europhys. Lett. 108, 67001 (2014).
[3] Y. Machida, S. Nakatsuji, S. Onoda, T. Tayama, and T. Sakakibara,
Nature 463, 210 (2010).
[4] S. Tomiyoshi et al., J. Phys. Soc. Jpn. 51, 2478 (1982); P. J. Brown
et al., J. Phys. Condens. Matter 2, 9409 (1990).
[5] S. Nakatsuji, N. Kiyohara, and T. Higo, Nature 527, 212 (2015).
[6] C. L. Chien and C. R. Westgate, The Hall Effect and its Applications (Plenum, 1980).
[7] T. Miyasato et al., Phys. Rev. Lett. 99, 086602 (2007).
Authors
S. Nakatsuji, N. Kiyohara, and T. Higo

Strange Metal Phase without
Magnetic Criticality
Nakatsuji and Uwatoko Groups
In condensed matter physics, it is highly important
subject to find a novel state of matter. Through many extensive work performed on strongly correlated electron systems
including heavy electron metals, high-Tc superconductors and organic conductors, it has been one of the mostintriguing and significant possibility that there should be
another class of a metallic phase that cannot be describedby the standard frame work of metal, namely, Fermi liquid
theory. It has been often called as strange metal phase.
However, its strong sensitivity to impurity has made it hardto distinguish it from quantum criticality associated with asingular zero temperature point, namely, quantum criticalpoint.
Nakatsuji and Uwatoko groups at ISSP University ofTokyo and a theoretical group at Rutgers University, USA,
have studied the pressure effect on heavy fermion system
β-YbAlB4 and found the first evidence of a strange metal
phase over an extensive region of pressure by suppressing
superconductivity. Just as the melting of ice involves atransition from solid to liquid state, strongly correlatedmaterials exhibit transition between magnetic ordered state
and a Fermi liquid state. Among the strongly correlated
electron systems, the heavy fermion metals often offer the

ISSP Activity Report 20155

[3] Y. Matsumoto, S. Nakatsuji, K. Kuga, Y. Karaki, N. Horie,
Y. Shimura, T. Sakakibara, A. H. Nevidomskyy, and P. Coleman,
Science 331, 316 (2011).
[4] T. Tomita, K. Kuga, Y. Uwatoko, P. Coleman, and S. Nakatsuji,
Science 349, 506 (2015)
Authors
T. Tomita, K. Kuga, Y. Uwatoko, P. Colemana,b, and S. Nakatsuji,aRutgers Universityb
University of London

Fig. 1. Conventional quantum critical point and new types of strange
metal phase realized in β-YbAlB4

convenient cases where the transition temperature can beeasily tuned, for example, by varying a physical parameter, such as magnetic field, external pressure and chemicalcomposition. In particular, the parameter where the transition temperature is suppressed to absolute zero temperature(minus 273.15 °C) is called quantum critical point (QCP).
Nearby the quantum critical point, at low temperatures, astrange metal state is believed to emerge due to quantum
critical fluctuations associated with the instability between
the magnetic ordered state and Fermi liquid state (Fig. 1(a)).
As the quantum critical point is very unstable, the quantum
critical phenomena such as the non-Fermi liquid state andsuperconductivity appear only nearby quantum critical point(conventional QCP in Fig. 1).
Here, we show our experimental study on an ultrapure
single crystal of the Yb-based heavy fermion compoundβ-YbAlB4. β-YbAlB4 is known to have a zero magnetic
field and zero pressure quantum critical point and exhibits
pronounced strange metal state and superconductivity at low
temperatures [1-3]. We applied high pressures and performedhigh resolution measurements of electric resistivity at
low temperatures to investigate its electrical properties. A
small magnetic field was used to suppress the superconductivity to reveal the strange metal state. Eventually, we
succeeded in elucidating a number of surprising phenomena(Fig. 1(b)) [4]:1) In the extensive pressure regime (0 < P < 0.4 GPa), a
strange-metal region with non-Fermi liquid properties
exists beneath the superconducting dome.
2) Both the strange metal phase as well as the superconducting (SC) phase (0 < P < 1 GPa) are isolated fromthe border of magnetism (P > 2.5 GPa).
3) The strange metal phase can not be described by thestandard theory of metals based on spin fluctuations. A
new type of mechanism is expected, and is most likely
associated with valence fluctuations.
These discoveries imply the existence of a strange
metallic phase (Fig. 1(b)), which should be well distinguished from the quantum critical states associated witha magnetic quantum critical point (conventional QCP in
Fig. 1(a)). This insight may be useful for clarifying themechanism for the strange metal phase. It may also contributeto understanding the superconducting mechanisms associatedwith other classes of strongly correlated materials such as
Cu-based and Fe-based high-temperature superconductors.
References[1] S. Nakatsuji, K. Kuga, Y. Machida, T. Tayama, T. Sakakibara,
Y. Karaki, H. Ishimoto, S. Yonezawa, Y. Maeno, E. Pearson, G. G.
Lonzarich, L. Balicas, H. Lee, and Z. Fisk, Nature Physics 4, 603(2008).
[2] K. Kuga, Y. Karaki, Y. Matsumoto, Y. Machida, and S. Nakatsuji,
Phys. Rev. Lett. 101, 137004 (2008).

6

ISSP Activity Report 2015

Field Induced Quantum
Metal-Insulator Transition in
the Pyrochlore Iridate Nd2Ir2O7
Nakatsuji and Kindo Groups
Recently, the iridium oxides (iridates) have attracted
tremendous attention for their unique position amongst
correlated electron materials, balancing comparable
electronic kinetic energy (bandwidth), Coulomb interaction(U), and spin-orbit coupling. This makes them susceptible
to novel quantum effects, forming topological phases, andphase transitions. Nd2Ir2O7 as a member of pyrochlore
iridates, is a rare example of a weak Mott insulator, which
undergoes a continuous metal-insulator transition (MIT) at
TMI ~ 32 K, the transition closest to the T = 0 quantum MIT
in this class of materials. Hence, novel quantum critical Mott
transitions, quantum spin liquid phases, and other exotic
states are expected to emerge in this weak Mott insulator.
Here, we report for the first time a quantum phase transition between a magnetic insulating state and a metallic statedriven by magnetic field. Our discovery may be potentially
important for applications, showing how to tune the metalinsulator transition by applying magnetic field in a weakMott insulator.
Anisotropic magnetotransport measurements were
performed under high magnetic field up to 50 T using highquality Nd2Ir2O7 single crystals. Strikingly, a strongly
anisotropic field induced quantum metal-insulating transition was discovered in this cubic symmetric material. The
insulator state can be suppressed by such a field ~ 10 T to azero temperature quantum MIT only for fields near the [001]axis, as shown in Fig. 1(a). The strong sensitivity to the field
direction is remarkable for a cubic crystal, as is the fact that
the MIT can be driven by such a small magnetic field, given
the 45 meV gap energy, which is ~ 50 times larger than the
Zeeman energy for an Ir4+ spin.
We mapped out the temperature-field phase diagram for
Nd2Ir2O7 under magnetic field along the [001] direction.
As shown in Fig. 1(b), a systematic change in the MIT from

Fig. 1. (a) Field-dependent magnetoresistivity with increasing anddecreasing field at T=2 K for various field directions between [001] and[110] directions. The angle Θ is measured from the [001] directions. (b)Temperature-field phase diagram for Nd2Ir2O7 under a magnetic fieldalong [001] direction.

continuous near zero field to first order under fields indicatesthe emergence of possible tricritical point proximate to thequantum phase transition, consistent with the hysteresis
seen in the field dependent data shown in Fig. 1(a). Notably,
this systematic change across the tricritical point may exist
only for the case using high quality single crystals. This new
insight contributed to the understanding of quantum MIT
behavior. The theorists have constructed a Kondo latticemodel considering the strong Kondo coupling between
Nd-moments and Ir conduction electron sites, emphasizing
the essential role of Nd physics in this quantum MIT picture
under magnetic fields.
References[1] Z. Tian, Y. Kohama, T. Tomita, H. Ishizuka, T. H. Hsieh, J. J.
Ishikawa, K. Kindo, L. Balents, and S. Nakatsuji, Nat. Phys. 12, 134(2016).
Authors
Z. Tian, Y. Kohama, T. Tomita, H. Ishizukaa, T. H. Hsieha,b, J. J.
Ishikawa, K. Kindo, Leon Balentsa, and S. NakatsujiaKavli Institute for Theoretical Physics, University of Californiab
Massachusetts Institute of Technology

Emergence of a Kondo Singlet
State with TK ≈ 2000K in
the Proton-Embedded Electron Gas:
Route to High-Tc Superconductivity
Takada Group
Physics in heavy fermion superconductors has been
understood by the concept of quantum criticality in a Kondo
lattice and the spin-fluctuation mechanism is believed tobe responsible for superconductivity, as inferred from thestrong correlation between Tc and TK. More specifically, Tc
is of the order of 0.1TK, as shown in Fig. 1, from which we
can conceive an idea that high-Tc superconductivity will beobtained if we can discover a Kondo system with very high
TK. In fact, the recently-discovered plutonium compounds
such as PuCoGa5 with Tc=18.5K and TK≈260K may be
regarded as a successful realization of this idea. Thus weshould make further pursuit of this idea by searching for a

Fig. 1. Superconducting transition temperature Tc versus Kondo
temperature TK (a characteristic energy scale for spin fluctuations) inheavy fermion superconductors.

Fig. 2. Phase diagram for sharp sequential transitions among (a) charge
resonance, (b) spin-singlet resonance, and (c) closed-shell H - ion
confinement states in the proton-embedded electron gas with N the total
number of electrons and rs the electron density parameter to specify theelectron gas.

new class of Kondo systems with TK higher than 1000K.
Theoretically, this search can be done by the first-principles
quantitative determination of TK for the composite system of
an impurity atom embedded in a metal.
As first suggested by Debye and Hückel, an atomic
nucleus charge +Ze in a metal is screened by accumulationof metallic electrons which is regarded as a charge resonanceand well described by the linear response theory. This
concept of metallic screening is prevailing for a century, but
because Z is not infinitesimally small, we need to consider
nonlinear effects in the screening, including the contribution from spin fluctuations. The spin contribution will beenhanced, if Z is an odd integer, such as Z=1 (case of a
proton), in which a spin-polarized bound state might appear
at the impurity atom.
With the above basic scientific issues in mind, we haveconcerned with the problem of hydrogen impurity in metals
which attracts long attention from a technological point ofview, such as hydrogen storage in solids, sensor applications,and catalysis. Its electronic state has been investigated interms of a proton immersed into the electron gas since 1970s,
but no serious attention has been paid so far to the spinresonance effect.
We have studied this system with changing the electron
density in a wide range by employing the diffusion Monte
Carlo simulations with the total electron number N up to
170 to accurately obtain the ground-state electronic distribution n(r) and found a sharp transition at rs≈2 from shortrange H+ screening charge resonance to long-range Kondo
singlet resonance, the emergence of which is confirmedby the presence of an oscillation-period-shortened Friedel
oscillation characteristic to the Kondo singlet state with TK
well beyond 1000K for rs in the range 3-8. Another transition to the closed-shell H- confinement state occurs at rs≈12.5(see Fig. 2).
This study not only reveals interesting competition
between charge and spin resonances, enriching the centuryold paradigm of metallic screening to a point charge, but also
discovers a long-sought high-TK system, opening a new andunexpected route to room-temperature superconductivity ina Kondo lattice made of protons. The metal hydrides, usually

ISSP Activity Report 20157

used for secondary batteries, are promising candidates, if themetallic electron density is suitably arranged and the lattice
constant is properly tuned to exhibit quantum criticality in
the Kondo lattice.
References[1] Y. Takada, R. Maezono, and K. Yoshizawa, Phys. Rev. B 92, 155140(2015).
Authors
Y. Takada, R. Maezonoa, and K. YoshizawaaJapan Advanced Institute of Science and Technology

Chiral Magnetic Effect inCondensed Matter Systems
Oshikawa Group
Relativistic massless fermions in 3+1 dimensions exhibit
so-called chiral anomaly where the chiral symmetry, which
is a symmetry of the Lagrangian, is broken due to quantum
effects. This results in the violation of the individual conservation of the number of left-handed and right-handed
fermions, allowing them to change to each other. Chiralmagnetic effect (CME), an induction electric current parallelto the applied external magnetic field is one of the mostintriguing phenomena related to this chiral anomaly. Dueto the time reversal symmetric nature of CME, the current
induced through CME is non-dissipative so that it has potential applications to the low-energy consuming electronics.
Recently, it becomes possible to synthesize a family of
three-dimensional materials, topological semimetals, where
electrons have (3+1) dimensional relativistic band dispersion
near the Fermi energy, similar to graphene in (2+1) dimensions. That is, in these materials, the relativistic massless
fermions emerge in the low-energy effective theory. It isthus tempting to observe the chiral anomaly and CME in atabletop experiment with a high-controllability which wecannot have in high-energy physics. Indeed, there are alreadyseveral experimental reports that claim to have observed thechiral anomaly and CME in topological semimetals throughthe negative magnetoresistance in the presence of parallel
electric and magnetic field. Although the negative magnetoresistance can be an indication of the chiral anomaly, it could
arise from other mechanisms and thus is not a smoking-gun
evidence for the chiral anomaly, let alone CME
In order to develop a direct and unambiguous probe ofFig. 1. Schematic picture of our setup. A solenoid (radius Rs) is represented as a surface current K between the two vacua. Inside them, acylindrical sample (radius rs) is placed.

8

ISSP Activity Report 2015

Fig. 2. Blue line: Total current Itotz [A] for parameters μ0σch = 1 [mm],ω=100 [Hz], B = 1 [Gauss]. Red: J1(μ0σchrs) in an arbitrary unit. The
current is resonantly enhanced for rs satisfying J1(μ0σchrs) = 0 represented by a dashed line.

CME, we studied the interplay of CME and electromagnetism in matter. Since CME can be understood as a consequence of an extension of electromagnetism called ChernSimons electromagnetism, transport properties are governedin a highly non-trivial manner by both electromagnetism
and CME. As a concrete example, we performed an electromagnetic field analysis in the setup shown in Fig. 1. We
demonstrated that the physically observed admittance is not
simply proportional to the chiral magnetic conductivity, evenwhen the transport is governed by the CME. Furthermore,
we found that the CME-induced AC current is resonantly
enhanced when the cross section matches the “chiralmagnetic length” as shown in Fig. 2. Our results imply thatthe electromagnetism is fundamental for actual transports in
topological semimetals and that proposals for their applications to future electronics need careful considerations on thisissue.
Reference[1] H. Fujita and M. Oshikawa, arxiv: 1602.00687
Authors
H. Fujita and M. Oshikawa

Optical Conductivity Nearan Antiferromagnetic Phase Transition
Tsunetsugu Group
Optical conductivity is one of fundamental dynamicalcorrelation functions in solids and measures a metallicity.
A few years ago, we numerically investigated opticalconductivity near the Mott metal-insulator transition in thefrustrated Hubbard model on a triangular lattice using acluster dynamical-mean field theory (CDMFT). We found a
singularity in its dc value and in contrast to general belief thecorresponding critical exponent does not coincide with thatof the order parameter [1]. Another important finding wasthat the vertex corrections are not so important in that case.
The Mott transition is driven by strong correlation effects,
which may suggest large vertex corrections. However,
our numerical data exhibited only a minor contribution of
theirs, and it is likely due to two characteristic features inthis system. The first is that spin fluctuations depend little
on wave vectors because of strong frustration. The second
is that quasiparticle scatterings due to spin fluctuations donot depend so much on their position on the Fermi surface.
We have performed a new study to examine if the vertex
corrections are more pronounced in an unfrustrated system.
To compare with the previous result, we particularly investigated the temperature region near an antiferromagnetic phasetransition.
We have used a 4-site CDMFT approach for calculating
optical conductivity σ(ω) in the square-lattice Hubbard
model at half filling, and studied its temperature dependence both above and below the antiferromagnetic transition
temperature TN for the Coulomb repulsion U=6.5t. Here,t is the matrix element of nearest-neighbor hopping. A real
antiferro long-range order is absent in two-dimensional
systems, and our results correspond to quasi-two-dimensional systems. To implement the vertex corrections in theantiferromagnetic phase, we have derived a new formulabased on our previous one for the paramagnetic phase. We
have found that the vertex corrections change various important details in temperature and frequency dependence ofconductivity near TN. This point differs from our previous
study on optical conductivity near the Mott transition in afrustrated triangular lattice.
General trends in the temperature evolution of σ(ω) areconsistent with expected behaviors near the metal-insulatortransition. In the high-temperature paramagnetic phase, σ(ω)

Fig. 1. (Top) Optical conductivity in the square-lattice Hubbard modelat half filling. Units are the quantum conductance. (Bottom) Temperature dependence of dc conductivity in the same model.

Fig. 2. Momentum dependence of the vertex function Γ that describes
the process that a particle-hole pair with momentum and spin(k’, σ’) are scattered to another pair with (k, σ). Plotted is the chargepart summed over σ and σ’ at Matsubara frequency νn =0. Dependenceson temperature and k–k’ strongly vary with the initial momentum k’.

has the Drude peak at ω=0 and also a broad peak aroundω~U, which is related to excitations to the Hubbard bands.
With lowering temperature, an antiferromagnetic phasetransition occurs at TN~0.34t, and σ(ω) changes its frequency
dependence below TN. While the incoherent peak continues
to exist, now a dip appears at ω=0 and the low-energy peakshifts to ω~t. Top two panels in Fig. 1 compare σ(ω) withand without the vertex corrections. Most importantly, thevertex corrections enhance variations in the frequency dependence. The Drude peak and the high-ω broad peaks in theparamagnetic phase are both sharpened. This continues in theantiferromagnetic phase and the two peaks are both sharpened by the vertex corrections, whereas the dip at ω=0 is alsoenhanced. Another important discovery is the behavior in atemperature region just above TN. As shown in the bottom
panel in Fig. 1, dc conductivity decreases in this region withlowering temperature, which is a precursor of the transition. However, the electron excitation spectrum shows nopseudogap behavior and the Drude peak is pinned at ω=0.
This temperature region appears before including the vertex
corrections, but the corrections extends it quite wide. These
are main results directly related to observable properties inexperiments.
For better understanding of the vertex corrections, wehave also carried out their detailed analysis. The vertex
corrections are determined by the vertex function Γ andfour single-electron Green's functions. As for the part of theGreen's functions, we have found that their spin dependent
components provide a dominant contribution in the antiferromagnetic phase. For Γ a predominant contribution is givenby the scattering processes of polarization made of a particle
on one sublattice and a hole on the other sublattice. We havealso examined Γ’s momentum dependence. Results in theparamagnetic phase are shown in Fig. 2. In the antiferromagnetic phase, the charge vertex and spin vertex functions
have similar momentum dependence but the sign is opposite.
A large difference is found in Γ’s momentum dependence
between quasiparticles at different positions in the Brillouinzone. For those at (π, 0) or (0, π), the momentum dependence
is dominated by nearest-neighbor correlations. For those at(π/2, ±π/2), the momentum dependence is quite one-dimensional. It is an important future study to clarify how to relate

ISSP Activity Report 20159

these exotic correlations to properties of conductivity.
This work is collaboration with Toshihiro Sato at RIKEN.
Reference[1] T. Sato, K. Hattori, and H. Tsunetsugu, Phys. Rev. B 86, 235137(2012); J. Phys. Soc. Jpn. 81, 083703 (2012).
Author
H. Tsunetsugu

Temperature-Driven andChemical-Potential-Driven Adiabatic
Pumping in Coherent Electron Transport
Kato Group
Adiabatic pumping is a process by which a finite
charge(heat) current is induced under periodic slow modulation of external parameters. This phenomenon has beenstudied for a long time as an important issue in time-dependent quantum transport. In addition to charge current, recent
developments in the field of nanotechnology have enabled
us to measure heat current under temperature bias in acontrolled way. This development has stimulated both of thetheoretical and experimental investigations of the thermodynamics properties of mesoscopic devices. Recently, adiabatic
heat pumping induced by temperature modulation has been
discussed in phonon transport via molecule junctions [1], andtemperature-induced transport has been discussed in contextsof thermoelectric transport and nonequilibrium thermodynamics [2].
We have studied adiabatic charge pumping driven bymodulation of thermodynamic variables of the reservoirs in
the coherent regime [3]. We have considered charge pumping
via a single-level quantum dot (QD) coupled to reservoirs
with time-dependent temperatures and chemical potentials(see Fig. 1), and have shown that charge pumping is indeed
possible when Coulomb interaction is introduced in the QD.
We have calculated pumping current up to the first order ofU (the strength of the Coulomb interaction in the QD) by
the perturbation theory based on the Keldysh formalism,
employing the method of the thermomechanical field todescribe temporal changes of the temperatures.
We show the estimated average pumping current in
Fig. 2 for a pumping frequency f=1GHz. The upper panelof Fig. 2 shows the pumping current under the chemicalpotential modulation described by μL(t)=μ0+μ1cos(2πft)
and μR(t)=μ0+μ1sin(2πft) for μ1=0.5Γ and TL=TR(=T)=0,
0.1Γ, 0.3Γ as a function of (μ0-εd)/Γ, where εd and Γ are an
energy level and a linewidth of the QD, respectively. The
lower panel of Fig. 2 shows the pumping current under thetemperature modulation described by TL(t)=T0+T1cos(2πft)
and TR(t)=T0+T1sin(2πft) for T1=0.3Γ, μL=μR=0, and εd=0,

Fig. 1. Schematic figure of the system considered in this study.

10

ISSP Activity Report 2015

Fig. 2. The upper panel: Estimated pumping current under thechemical-potential modulation described by μL(t)=μ0+μ1cos(2πft) andμR(t)=μ0+μ1sin(2πft) for μ1=0.5Γ and TL=TR=0, 0.1Γ, 0.3Γ as a functionof (μ0-εd)/Γ. Here, εd and Γ are an energy level and a linewidth of the
QD, respectively. The lower panel: Estimated pumping current under
the temperature modulation described by TL(t)=T0+T1cos(2πft) andTR(t)=T0+T1sin(2πft) for T1=0.3Γ, μL=μR=0, and εd=0, 0.1Γ, 0.3Γ as afunction of T0.

0.1Γ, 0.3Γ as a function of T0. In the present estimate, wehave assumed the symmetric coupling to the two reservoirs, and have set the strength of Coulomb interaction
as U=Γ. As seen in Fig. 2, the estimated pumping current
is of order of 1-10pA, which is measurable in a standard
experimental setup. The pumping current is proportional toboth the frequency f and the Coulomb interaction U in thepresent calculation, and therefore is reduced if f and U aretaken as smaller. In the chemical-potential-driven pumping,
we have shown that the pumping current is related to thefirst energy derivative of the spectral function (the local
density of states in the QD) at low temperatures. Similarly,
in the temperature-driven pumping, we have shown that thepumping current is related to the second energy derivativeof the spectral function at low temperatures; the sign changeof the pumping current for εd=Γ in the lower panel of Fig. 2
originates from this fact. The insets of Fig. 2 show the timedependence of the current induced by the modulation at the
maximum of the pumping current in the main panel.
We have also shown that the present charge pumping
originates from a time delay in a change of the occupation
number of the QD with respect to modulation of the reservoirs. This time delay is understood by a relaxation time
determined by circuit elements characteristic of coherent
electron transport under external AC modulation of voltages
and temperatures.
In this study, we have studied charge pumping in a
simple setup with a single-level QD up to the leading orderof Coulomb interaction. It is a future problem to formulate
adiabatic pumping in the presence of a strong Coulombinteraction. Also, with the present formulation, we would beable to tackle general pumping in coherent transport from theviewpoint of the nonequilibrium thermodynamic propertiesof mesoscopic devices.
References[1] J. Ren, P. Hänggi, and B. Li, Phys. Rev. Lett. 104, 170601 (2010).
[2] T. Yuge, T. Sagawa, A. Sugita, and H. Hayakawa, J. Stat. Phys. 153,
412 (2013).
[3] M. Hasegawa and T. Kato, arXiv:1601.05812 (2016).
Authors
M. Hasegawa and T. Kato

“Zitterbewegung” Appeared as
Conductance Fluctuation in Transport
Between Quantum Point Contacts
Katsumoto GroupFor a particle which obeys the Dirac equation, velocity
is not a well-defined quantity in that the kinetic motion inreal space is the mixed one of particle and anti-particle. Sucha quantum mechanical state can be described as a superposition of states with velocities +c and –c. Hence in thespace of velocity-base, such a particle is in a zigzag motion(trembling motion), which is called “Zitterbewegung” (ZB)(a)

in Germany[1]. A trivial analog in electrons in solids isoscillation in velocity of classical electrons due to periodic
lattice potential. Even the experimental observation of sucha trivial phenomenon is difficult at present. A bit non-trivial
phenomenon closer to the ZB of electrons in vacuum is azigzag motion of electrons due to the spin-orbit mixing of thetwo (spin and orbital) freedoms. This is also called ZB and
expected to be observable in experiments though no clear
observation has been reported yet.
For the observation of ZB in transport, we need toprepare spin-polarized electrons in a system with a simpleform spin-orbit interaction. We have experimentallyconfirmed that a quantum point contact (QPC) in a systemwith strong Rashba-type spin-orbit interaction (RSOI) canwork as an efficient spin polarizer on plateaus of a half andof a one conductance quantum (2e2/h) [2]. Hence a system
of QPCs with RSOI can provide an ideal test-bed of ZB in
solids.
Figure 1(a) shows a schematic view of the present systemwith two sets of three parallel QPCs made from InAs 2DEG.
The two are placed face-to-face. The two-terminal conductance through a confronting QPC pair (2-5) as a functionof magnetic field for various field directions is shown in
Fig.1 (b). Reproducible fluctuations reminiscent of universal
conductance fluctuation (UCF) appear in the magnetoconductance. Surprisingly the amplitude nor the characteristic frequency does not change with the field angle. On theother hand in the transport not through QPC (terminal 1 to 4)
no fluctuation appears and ordinal Shubnikov-de Haas oscillation appears for vertical magnetic field. In short the fluctuation appears only when the spins of conduction electrons
are aligned.
The above results can be well explained within the
ZB framework. The external magnetic field modifies thefrequency of spin precession thus that of ZB, which resultsin large variation of scattering cross section. Superpositionof various scattering paths leads to the observed conductancefluctuation.
References[1] W. Zawadzki and T. M. Rusin, J. Phys.: Condensed Matter 23,
143201 (2011).
[2] M. Eto, T. Uehara, H. Taniguchi, K. Satoh, Y. Ishii, andI. Watanabe, J. Phys. Soc. Jpn. 84, 053703 (2015).

(b)

Authors
Y. Iwasaki, Y. Hashimoto, T. Nakamura, and S. KatsumotoDistant-Dependent Tunneling
Process Observed in Iron Nitride
Komori Group

Fig. 1. (a) QPC positioning in the sample. (b) Conductance fluctuation(through QPC 2 to 5) versus magnetic field. The field is rotated from 0º(parallel to the plane) to 90º (perpendicular).

Scanning tunneling microscopy (STM) is one of themost powerful tools to investigate surface topographic andelectronic structures with an atomic resolution. Surface
nanostructures are often discussed based on the topographic
image. However, its image contrast is mainly based on theelectron tunneling processes between the STM tip and thesurface local electronic states [1]. Systematic changes of theimage contrast as a function of the sample-bias voltage Vs
have been widely interpreted in terms of energy-dependent
electronic structures. The STM tip-surface distance, d, is

ISSP Activity Report 201511

square lattice of atomic size dots with increasing d. The line
profiles shown in Fig. 1(h) are systematically changing withthe tunneling current. By measuring the images with various
VB values, the threshold distance of the image change wasfound to be independent of VB . The tunneling spectrum
on the Fe2N surface has several peaks that well correspondto the peaks of the calculated total local density of states(LDOS) as in Fig. 2(a,b). The observed systematic d dependence of the tunneling spectra shown in Fig. 2(c) implied
the shift in the dominant electronic states contributing to thetunneling process. The LDOS calculations above the surface
by first principles indicate the change of the dominantorbitals detected by the STM tip from the Fe 3d states to thes/p states with increasing the tip-surface distance.

Fig. 1. (a) Schematic model of an Fe4N crystal. The layer consisting of
Fe2N stoichiometry, indicated by green lines, appears at the surface of
the Fe4N thin films on Cu(001). (b,c) Schematic surface models of the
p4gm(2x2) reconstruction (b) corresponding to the monatomic Fe2N
layer on Cu(001), and c(2x2) reconstruction (c) corresponding to theideal bulk Fe2N plane. (d-g) Topographic images taken at Vs = 0:25 Vwith varying It from 0.1, 3.0, 10 to 45 nA. (h) Line profiles at Vs = 0:25
V, measured along lines indicated in (d-g). From the top to the bottom,
I varies as follows: 45, 40, 35, 30, 28, 25, 22, 20, 18, 15, 12, 11, 10, 9.0,
8.0, 7.0, 5.0, 3.0, 2.0, 1.0, 0.9, 0.8, 0.7, 0.6, 0.5, 0.4,.0.3, 0.2, and 0.1
nA, respectively. Empty circles indicate peak positions extracted fromone Fe dimer.

an alternative parameter of the image change on the surface
consisting of several orbitals with different decay lengthsof the wave functions into the vacuum. In such systems, theimage can be changed by the shift of the dominant surface
orbital contributing to the tunneling process. We havedemonstrated the d-dependent STM imaging and spectroscopy on the surface of a monatomic layer of iron nitride(Fe2N) on Cu(001) (see Fig. 1) to characterize the orbitalsensitive tunneling as the origin of the topographic imagechanges [2].
Figure 1(d-g) shows a systematic change of the
topographic images of the Fe2N layer from a dimerizedatomic image reflecting the atomic surface structure to a

Fig. 2. (a) dI/dV spectra of Fe2N on Cu (001) and the clean Cu(001)surface. The STM tip was stabilized at It = 30 nA and Vs = 1 V. (b)Calculated spin-resolved LDOS of single-layer Fe2N on Cu(001). Fe
and N states are separately shown. (c) Distant-dependent dI/dV spectra
measured at d = 0.42, 0.34, and 0.29 nm from the bottom to the top.
Dashed curves indicate a tunneling background obtained by a TersoffHamann approximation. [1] (d-f) Topographic images taken at Vs =0.25 V with d = 0.29 nm (d), 0.34 nm (e), and 0.42 nm (f).

12

ISSP Activity Report 2015

References[1] J. Tersoff and D. R. Hamann, Phys. Rev. B 31, 805 (1985).
[2] Y. Takahashi et. al., Phys. Rev. Lett. 116, 056802 (2016).
Authors
F. Komori, Y. Takahashi, T. Miyamachi, K. Ienaga, N. Kawamuraa, and
A. ErnstbaScience & Technology Research Laboratories, NHK,b
Max-Planck-Institut fur Mikrostrukturphysik

Real-Time Operando Observationof Reaction Processes of CO2 on
Cu(997) by Near-ambient Pressure
X-ray Photoelectron Spectroscopy
Yoshinobu and I. Matsuda Groups
Activation of CO2 is an important topic in the efficientuse of CO2 as a chemical feedstock. Methanol synthesis
from CO2 and H2 on a Cu/ZnO catalyst has been widely
studied. CO2 is chemically inert, and thus the interaction of
the molecule with metallic Cu surfaces plays an essential
role for molecular activation. On metallic copper, very low
reactivity of CO2 on low-index surfaces was reported underultrahigh vacuum conditions. In contrast to the flat surfaces,
the dissociation of CO2 into CO was reported on vicinal Cu
surfaces previously. These results indicate that defect sites,such as step and kink, may be important for the CO2 activation. However, the reaction condition in UHV is far from areal catalytic reaction, which is normally operated at higher
temperature and nearly/above atmospheric pressure. Such
differences in pressure and temperature may lead to distinct

Fig. 1. Schematic of the operando AP-XPS system at SPring-8
BL07LSUFig. 2. A series of (a) O 1s and (b) C 1s AP-XPS spectra of Cu(997)
at 340 K under CO2 pressure of 0.8 mbar as a function of elapsed time
together with the assignment of each peak. Only selected spectra fromthe whole series are shown in the figure. The photon energy was 630
eV. The CO2 gas was introduced in the gas cell at t = 0 s. The fitting
results for the spectra at t = 5474 s (O 1s) and t = 5607 s (C 1s) arealso shown in the figure. (c) O 1s and (d) C 1s XPS spectra after the
AP-XPS measurements shown in (a) and (b). The gas cell was evacuated to UHV (~10-9 mbar), and then the XPS measurements were
performed.

reactivity under ambient conditions from UHV, reflecting
thermodynamic and kinetic effects. Ambient pressure X-ray
photoelectron spectroscopy (AP-XPS) is a powerful toolfor investigating electronic structures and chemical states ofadsorbates and a substrate quantitatively under reactant-gas
pressure.
Here, the reaction of CO2 on the vicinal Cu(997) surface
at 340 K under CO2 gas pressure of 0.8 mbar was investigated by ambient pressure X-ray photoelectron spectroscopy (AP-XPS). We found that initially carbonate (CO3)
was produced on the surface through the reaction of CO2
with oxygen formed from CO2 dissociation; the amount ofadsorbed CO3 was increased and saturated as time elapsed
and after saturation of adsorbed CO3, atomic oxygen
appeared on the surface, indicating that CO2 dissociation into
CO and O continued to take place. The estimated saturation
coverage of CO3 from XPS is rather small (0.05 ML).
The experiments were performed using a newly developed AP-XPS apparatus at the soft X-ray undulator beamline
BL07LSU of SPring-8. Figure 1 shows a schematic of thepresent operando AP-XPS system at SPring-8 BL07LSU.
The AP-XPS system consists of four interconnected UHVchambers; an analysis chamber, a preparation chamber, aload-lock chamber, and a fast-entry chamber. The analysis
chamber is used for XPS measurements both in UHV andat ambient conditions. The preparation chamber is equippedwith an ion source and low energy electron diffraction optics.
The load-lock chamber and the fast-entry chamber allow the
introduction of samples from the air into the UHV system.
Figures 2(a) and (b) show series of O 1s and C 1s
AP-XPS spectra of the Cu(997) surface at 340 K under CO2
pressure of 0.8 mbar as a function of elapsed time. Gas-phase
CO2 peaks were initially observed at 536.6 eV in an O 1s
XPS spectrum at t = 376 s, and at 292.8 eV in a C 1s XPS
spectrum at t = 507 s. These gas-phase peaks were shifted to536.4 eV and 292.6 eV, respectively, after a lapse of about
5500s. At t = 376 s, a peak of adsorbate was observed at531.3 eV in the O 1s region. Three peaks of adsorbates wereobserved in the C 1s spectrum (t = 507 s) at 288.4 eV witha broader shoulder peak at higher binding energy (289.0eV), and at 284.4 eV (C0), which is assigned to neutralcarbon species such as carbon atoms and hydrocarbons. As
discussed later, the other adsorbate peaks at 531.3, 289.0
and 288.4 eV are assigned to carbonate (CO3). The amountof CO3 was saturated at t ~ 2000 s, and then a new peak at
529.5 eV appeared in O 1s spectra. This peak is attributed
to atomic oxygen. Figures 2(c) and (d) show O 1s and C 1s
spectra measured under UHV (~10-9 mbar) after a seriesof AP-XPS measurements. The adsorbates formed in thepresence of 0.8 mbar CO2 were stable at 340 K and remainedon the surface even after evacuating the gas cell to UHV. The
result indicates that the decomposition of CO3 does not occur
at 340 K.
The composition ratio between oxygen and carbon at thesaturation region (t > 2000 s) was calculated from the area
intensity of the O 1s peak at 531.3 eV and the sum of theintensities of the two C 1s peaks at 289.0 and 288.4 eV. In
the estimation, the O 1s and C 1s intensities of the adsorbate
peaks were normalized by those of the gas-phase CO2 peaksin these spectra to cancel out differences in the analyzer
transmission function and the core-election ionized crosssection between O 1s and C 1s. The O/C ratio was estimatedto be 3.1 ± 0.1. Similar experiments were done using aphoton energy (hν) of 740 eV to check the effect of photoelectron diffraction on the estimation of the O/C ratio. The
estimated ratio at hν = 740 eV is 3.2 which is within the error
in the case of hν = 630 eV. If the observed two peaks in C
1s are due to both CO3 and chemisorbed CO2, the O/C ratio
should be in the range from 2 to 3. Thus, the peaks at 531.3,
289.0 and 288.4 eV are assigned to CO3.
The produced CO3 is stable at 340 K even after evacuation to UHV as shown in Figs. 2(c) and (d). The gas-phasepeaks in AP-XPS spectra (Figs. 2a and b) are shifted tolower binding energies with increasing the CO3 coverage,
indicating the increase of the work function by the CO3
adsorption. Therefore, adsorbed CO3 is negatively charged
by charge transfer from the Cu substrate. The present study
clearly shows a facile formation of CO3 on the stepped Cu
surface, and CO3 may be a key intermediate in CO2 activation.
Reference[1] T. Koitaya et al., Top. Catal. 59, 526 (2016).
Authors
T. Koitaya, S. Yamamoto, Y. Shiozawa, K. Takeuchi, R.-Y. Liu,
K. Mukai, S. Yoshimoto, K. Akikubo, I. Matsuda, and J. Yoshinobu

Chiral Spin Spiral Structure
Studied by Spin-Polarized
Scanning Tunneling Microscopy
Hasegawa Group
Because of the potential application for future spintronics
devices, spiral magnetic structures, such as skyrmion lattices,domain walls, and homogeneous spin spiral structures, havebeen a subject of extensive studies. Various types of spinrotations have been reported; Bloch-type (helical) or Néeltype (cycloidal), left-handed (↑←↓) or right-handed (↑→↓),and chiral or non-chiral. To determine these types, neutron
scattering, Lorentz microscopy, etc. have been utilized. For

ISSP Activity Report 201513

nanometer- or atomic-scale spin spiral structures, often
formed in ultrathin films, spin-polarized scanning tunnelingmicroscopy (SP-STM), which detects spin orientations inatomic-scale spatial resolution, is the only method for thedetermination. We have investigated the types of the spin
structure observed in a monolayer (ML) Mn thin film formed
on a tungsten substrate using the ultimate spin-probe microscopic method.
In magnetic systems whose inversion symmetry is
broken, the Dzyaloshinskii–Moriya interaction (DMI) plays
a key role in the formation of chiral spin structures. Since thesymmetry is naturally broken at interfaces, several systems
composed of 3d magnetic thin ﬁlms and 5d non-magnetic
heavy-elemental substrates showing a strong spin-orbit
coupling exhibit DMI-driven chiral spin structures. For
the investigation of how overlayers and substrates affectthe polarity and strength of DMI a W(110) substrate isone of the ideal systems because various chiral structures
have been discovered on it with overlayers. From SP-STM
images taken with a tip whose magnetization direction iswell controlled, we revealed that the Mn monolayer indeed
exhibits a cycloidal spin spiral structure with a left-handed
rotation (See a schematic shown in Fig. 1(e)). By comparing
with e.g. the case of magnetic domain walls observed in Fe
thin films, we found that the polarity of DMI is basicallydetermined by the substrate.
The SP-STM experiments were performed with anultrahigh vacuum STM at 5 K using Fe-coated W tips as amagnetic probe. Since the amount of the tunneling current is
proportional to the cosine of the angle θ between the tip andsample magnetization directions, one can obtain the spin ormagnetic contrast of the sample using the magnetized tip. A
two-axis superconducting magnet was used to align the tip
magnetization to the specific orientations of the sample.
A typical STM image taken on monolayer Mn-covered
W(110) surface is shown in Fig. 1(a). A cross-sectional

Fig. 1. (a) STM image of a Mn monolayer (ML) formed on a W(110)substrate. (b) Cross-sectional proﬁle taken along the blue line in (a).
(c) Spin-polarized STM image of 1 ML Mn/W(110) taken with an
Fe-coated W tip magnetized perpendicular to the sample surface. (d)Cross-sectional proﬁle averaged in the boxed area in (c). (e) schematicof the magnetic structure of ML Mn/W(110).

14

ISSP Activity Report 2015

Fig. 2. (a, d) SP-STM images of 1 ML Mn/W(110) taken in the same
area with an Fe-coated W tip magnetized in the in-plane (a) and out-ofplane directions (d) The direction of the applied magnetic ﬁeld isshown by the arrows. (b, e) Images whose nonmagnetic contribution
was subtracted from (a) and (d). (c, f) Cross-sectional proﬁles averaged
in the boxed areas of (b, e). The same colored dots indicate the sameatomic rows in the images of (b, c, e, f).

proﬁle shown in Fig. 1(b) indicates atomically ﬂat terracesof Mn ML grown from the W step edges. Figure 1(c) shows
an SP-STM image taken on an ML region of Mn/W(110)with a tip magnetized perpendicular to the sample surface.
Bright and dark rows separated by an atomic distance along
the [11
̅0] direction indicate antiferromagnetic magnetizationof the Mn [001] rows. The contrast vanishes periodically at
the Mn rows whose magnetization directions are close to thein-plane direction (i.e., θ is close to 90°), indicating a spinspiral structure.
There are two possible types of spin spiral structure to
explain the observed images; a cycloidal structure whose
spins are rotating in the (001) plane and a helical one rotatingin the (11̅0) plane. To determine the rotational type of thespin structure, SP-STM images are taken with a tip magnetized along the [001] direction. The obtained images showed
suppressed magnetic contrast, indicating a cycloidal spin
spiral structure. This result is consistent with the mechanismof the interfacial DMI, which only produces cycloidal spin
spiral structures or Néel-type domain walls.
Then, in order to clarify the rotational sense of thecycloidal spin spiral structure, we performed SP-STM
measurements with a spin-polarized tip magnetized in two
orthogonal directions within the (001) plane. When we focus
on every two adjacent spins, the magnetic contrast exhibitsa sinusoidal variation. By changing the direction of the tip
magnetization from parallel to perpendicular to the surface[i.e. from the leftward to the upward direction], we shouldobserve +90° or -90° phase shifts in the sinusoidal proﬁledepending on the rotational sense.
Figures 2(a, d) show SP-STM images taken in the same
area with the tips magnetized in the directions shown in theﬁgures. White clusters provide a proof that it is the same
area. In order to extract the magnetic contrast, we subtracted
the nonmagnetic contributions, which are derived byaveraging two SP-STM images taken with the tips magnetized in opposite directions. Cross-sectional proﬁles shownin Figs. 2(c, f) indicate the direction of the phase shift isconsistent with that expected for the left-handed spin spiralstructure.
The domain walls in the Fe DL/W(110) were found as
Néel-type domain walls with right-handed rotation, which
can be explained by the consequence of the competition
between ferromagnetic interaction (↑↑) and right-handed
DMI (↑→). On the other hand, the left-handed rotation of
Mn ML (↑ ↘ ← ↗ ↓) is a consequence of the competition
between antiferromagnetic interaction (↑↓) and right-handed
DMI (↑→). We thus found the consistent role of the substrateon the polarity of DMI in the both cases.

Reference[1] M. Haze, Y. Yoshida, and Y. Hasegawa, arXiv:1604.01123 (2016).
Authors
M. Haze, Y. Yoshida, and Y. Hasegawa

Nanocomposite Electrodes for
Photoelectrochemical Water Splitting
Lippmaa Group
Photoelectrochemical water splitting can be used toharvest solar energy and produce hydrogen gas, which canbe stored for later use in a fuel cell to generate electricity
or used as a raw material for chemical synthesis. A major
obstacle to wide-spread solar hydrogen production is thelow efficiency of the energy conversion process due to large
recombination losses in typical water-stable oxide semiconductors, such as titanates. In a typical oxide semiconductor,
illustrated in Fig. 1a, a band bending region exists at theoxide-water interface, where electron-hole pairs are formedby light excitation and separated by the internal electricfield. For an n-type semiconductor, photogenerated holes
would be transported through a surface depletion layer tothe surface, where the oxygen evolution reaction can takeplace. Hydrogen would be produced on a suitable counterelectrode. However, only photocarriers formed within a
few tens of nm of the surface can escape from the semiconductor and participate in water splitting, whereas photocarriers formed deeper in the semiconductor are rapidly lost to
trapping and recombination. Considering the visible lightabsorption length, which is closer to micrometer scale in
doped titanates, the fraction of incident light that can actually
be converted to active photocarriers at the surface is on theorder of a percent.
Various strategies exist for improving the charge extraction efficiency from oxide photoelectrodes. Besides apure materials approach directed at finding more efficient
semiconductors and doping schemes, it is also possible todesign suitable nanoscale structures that improve chargecollection by virtue of geometric effects. In our work, wehave developed a method of growing noble-metal-doped
titanate semiconductors where some of the noble metal segregates in the form of nanoscale pillars as illustrated in Fig. 1b.

When the nanopillar consists of a high work function metal
and the surrounding semiconductor is an n-type material,
tubular Schottky junctions form around each pillar. Theinternal field of the Schottky junction ensures efficient charge
separation and extraction throughout the thickness of the thinfilm photoelectrode, while the metal nanopillars provides a
low-resistance charge extraction path to the film surface.
The formation of noble metal nanopillars is achieved byconsidering the kinetic and thermodynamic crystal growthparameters in a pulsed laser deposition process. For several
noble metals, it is possible to find a balance between theoxidation rate of the metal and the growth rate of the crystal,
where the average background oxygen pressure is low
enough for metal segregation to occur at the initial growthstage of a film and the growth rate is balanced with thesurface migration rate so that further segregated metal canform vertical pillar structures.
From the point of view of water splitting, the best
starting material for the nanopillar composite photoelectrodegrowth is Ir:SrTiO3. Homogeneously doped Ir:SrTiO3 is ann-type semiconductor, while bulk iridium metal is a highworkfunction material, ensuring that Schottky junctions
form at Ir – Ir:SrTiO3 interfaces. Additionally, Ir and IrO2
are electrocatalysts that are known to promote the oxygen
evolution reaction in water. The formation of segregated Ir
metal inclusions in a Ir:SrTiO3 film can be seen in scanningtransmission electron microscope (STEM) plan and crosssection views in Fig. 1c. The cross-section image showsthat the pillars do indeed nucleate at the SrTiO3 substrateinterface, and that approximately 10 nm wide pillars extend
through the thickness of the film to the photoelectrode film
surface. The spontaneous segregation behavior seen for Ir
can be reproduced for a variety of noble metals. Although
the particular growth parameters vary from metal to metal,
nanopillar formation has been observed for Ir, Pt, Pd, and Rh(Fig. 1(d)).
Reference[1] S. Kawasaki, R. Takahashi, T. Yamamoto, M. Kobayashi,
H. Kumigashira, J. Yoshinobu, F. Komori, A. Kudo, and M. Lippmaa,
Nature Commun. 7, 11818 (2016).
Authors
S. Kawasaki, R. Takahashi, T. Yamamoto a , M. Kobayashi b ,H. Kumigashirab, J. Yoshinobu, F. Komori, A. Kudoc, and M. LippmaaaNagoya Universityb
Photon Factory, KEKcTokyo University of science

The Novel Magnetic and Valence
Instabilities Tuned by Pressure in YbNi3Ga9
Uwatoko Group

Fig. 1. (a) Operating principle of a photocatalytic energy conversion
system where photogenerated charges are extracted only from a thinsurface layer. (b) A nanopillar composite electrode where tubular
Schottky junctions surrounding metal pillars extend the charge extraction region to the full depth of a thin film electrode. (c) Plan and crosssection STEM views of Ir metal nanopillars in a Ir:SrTiO3 matrix, (d)Examples of (left-to-right) Ir, Pt, Pd, and Rh nanopillars grown in a
SrTiO3 matrix. The diameter of all pillars is 5 to 10 nm.

In heavy fermion systems, non-Fermi liquid state and/or unconventional superconductivity often appear near aquantum critical point (QCP) where a second order phasetransition is suppressed to zero temperature [1]. Therefore,pressure tuning of the ground state from a nonmagnetic state
to a magnetic state or vice versa has attracted attention. The
anomalous properties in the vicinity of QCP are described by
the spin fluctuation theory, especially for most of Ce-based
compounds, however, the unconventional critical behavior
has been recently reported in several Yb-based heavy fermion
compounds. Soon after, several theories have been proposed

ISSP Activity Report 201515

Authors
K. Matsubayashi a , T. Hirayama, T. Yamashita b , S. Ohara b ,N. Kawamura c , M. Mizumaki c , N. Ishimatsu d , S. Watanabe e ,K. Kitagawaf, and Y. Uwatoko
aUniversity of Electro-Communications
bNagoya Institute of Technology
cJASRI/SPring-8
dHiroshima University
eKyushu Institute of Technology
fUniversity of Tokyo

Coupling of Two Quantum Hall States at
Graphene Monolayer/Bilayer Boundary:Bulk-Edge Correspondence
between Different Materials
Osada Group

Fig. 1. Contour plot of the Yb valence in the temperature-pressure
phase diagram of YbNi3Ga9. The transition and crossover temperatures
are deduced from resistivity (circles) and ac magnetic susceptibility(squares) measurements. Here, closed squares below and above Pc
indicate the CP and TCP, respectively. The dashed lines are guides tothe eye.

to clarify the origin of the unconventional criticality, nevertheless, it remains an open question. Since the pressure
variation of magnetism in Yb systems is accompanied by avalence change from the divalent to the trivalent state of Ybions, direct observations of Yb valence toward the magnetic
QCP is highly desirable. Here we show the realization of thepressure-induced valence crossover and the novel metamagnetic behavior possibly due to the valence instability near themagnetic quantum phase transition in intermediate valence
YbNi3Ga9 [2,3].
Figure 1 shows the temperature-pressure-magnetic field
phase diagram of YbNi3Ga9 together with a contour plotof the Yb valence value in the T-P plane. We have revealeda clear evolution of the Yb valence toward the magnetic
trivalent state as well as the change from the nonmagnetic
to the magnetic ground state with increasing pressure. The
resulting phase diagram suggests that the occurrence of thepressure-induced first-order magnetic transition in YbNi3Ga9
is associated with enhanced valence fluctuations. This interpretation is consistent with the observations of a first-ordermetamagnetic transition below Pc, which is associated withthe field-induced valence change from the mixed-valent state
to the trivalent state with magnetic degrees of freedom. Our
results suggest that the proximity to the critical end point of
the first-order valence transition gives rise to the unconventional critical behavior in other Yb systems.
References[1] P. Gegenwart, Q. Si, and F. Steglich, Nat. Phys. 4, 186 (2008).
[2] S. Watanabe and K. Miyake, J. Phys. Condens. Matter 23, 094217(2011).
[3] T. Yamashita, R. Miyazaki, Y. Aoki, and S. Ohara, J. Phys. Soc. Jpn.
81, 034705 (2012).
[4] K. Matsubayashi, T. Hirayama, T. Yamashita, S. Ohara,
N. Kawamura, M. Mizumaki, N. Ishimatsu, S. Watanabe, K. Kitagawa,and Y. Uwatoko, Phys. Rev. Lett. 114, 086401 (2015).

16

ISSP Activity Report 2015

The edge channel transport in the quantum Hall (QH)
states has been extensively investigated in graphene systems.
The subjects of most studies have been the p-n homojunction of monolayer graphene (MLG) or bilayer graphene(BLG), since they were the first bipolar QH junctions
between electron and hole QH states. The graphene p-njunctions are realized using the dual gate FET devices, inwhich an additional top-gate electrode partially covers MLG
or BLG so as to control the carrier number and polarity of
the covered part independently. In this case, both sides of
the junction are the same material with the same band structure under different potential energy. The main issue was
the mixing between the electron and hole QH edge channels
propagating parallel along the junction in both sides.
Here, we consider another type of QH junctions in thegraphene system, namely, the hetero-junction of MLG and
BLG. In this case, the both sides of the junction have thesame polarity (n-n or p-p junction), but they are different
materials (MLG and BLG) with the different band structures:the low-energy band dispersion is the Dirac cone in MLG,
but it shows the quadratic band touching in BLG. Under
the perpendicular magnetic field B, these energy bands arequantized into the Landau levels (LLs), which have four-foldspin and valley degeneracies. The most characteristic featureis the appearance of the zero-energy LL resulting from the
Berry phase of ± π and ± 2π around the band contact points
in MLG and BLG, respectively. Note that the zero-energy
LLs in MLG and BLG have different degeneracies; four-Fig. 1. Hall resistance R14,25 and transverse resistance R14,23 across the
MLG/BLG junction. The horizontal bars indicate the quantized values
assuming strong coupling limit. Inset: microscope image of the FET
device.

fold in MLG but eight-fold in BLG in which both the n=0
and n=1 LLs degenerate to zero energy. This fact resultsin the different quantized values of the Hall conductivity;
σxy = N1e2/h = ±(4N + 2)e2/h in MLG and σxy = N2e2/h =±(4N + 4)e2/h in BLG (N = 0, 1, 2, · · · ). Here, N1 and N2
are the Chern numbers of the QH states in MLG and BLG,
respectively. The spin or valley splitting is ignored.
In the present work, we have experimentally studied the
QH edge transport across the MLG/BLG junction employing
hexagonal boron nitride (h-BN) substrate, which remarkably improves sample quality, and we have clarified the edge
channel configuration along the MLG/BLG junction. If theboth sides of the junction is perfectly decoupled, there are|N1| and |N2| edge channels in MLG and BLG sides, respectively, so that they propagate in opposite direction along thejunction. If finite coupling exists between both sides, theymust show pair annihilation resulting in |N1| – n and |N2| – nchannels at the boundary. At the strong coupling limit, n =min(|N1|, |N2|), |N2 – N1| channels with the same direction
remains at the boundary. These features are required from thebulk-edge correspondence at the boundary of two QH states,
which basically originates from the charge conservation law.
The coupling feature is not trivial since MLG and BLG havedifferent crystal and band structures. Whereas electronic
states in MLG consist of A and/or B site Wannier states,
those in BLG mainly consist of A and/or B' site Wannier
states. So, the envelope function is not continuous at the
MLG/BLG boundary. The coupling depends on the connection of the true wave functions at the boundary.
Figure 1 shows the observed Hall resistance and transverse resistance across the MLG/BLG boundary of the FET
device fabricated on h-BN substrate as functions of thefilling factor, which is controlled by the back gate voltage.
The carrier densities of the MLG and BLG parts are almost
same, since the gate voltages of charge neutrality points
coincide in both parts. The horizontal bars indicate thequantized values calculated from the Landauer-Büttiker
formula assuming the strong coupling limit. The calculation
well reproduces the observed result in the positive filling(n-type) region. Considering the BLG side shows imperfect
QH effect in the negative filling (p-type) region in the present
device, this agreement indicates that the coupling between
two QH states at the boundary is so strong that the minimum
number (|N2 – N1|) of edge channels survives at the boundaryof MLG and BLG.
In the figure, we can see another remarkable featurearound the zero filling. The transverse resistance shows finedip structures. They are considered to reflect the degeneracy
breaking of the zero-energy LL in MLG and BLG. Althoughno perfect splitting was observed in MLG or BLG in thepresent device, this result suggests the splitting of the edge
channels along the boundary.

One-Third Magnetization Plateau witha Preceding Novel Phase in Volborthite
Hiroi, Kindo, Tokunaga and Takigawa Groups
We have synthesized high-quality single crystals of
volborthite, a seemingly distorted kagome antiferromagnet,
and carried out high-field magnetization measurements up to
74 T and 51V NMR measurements up to 30 T. An extremely
wide 1/3 magnetization plateau appears above 28 T andcontinues over 74 T at 1.4 K, which has not been observedin previous studies using polycrystalline samples (Fig. 1).
NMR spectra reveal an incommensurate order (most likely aspin-density wave order) below 22 T and a simple spin structure in the plateau phase. Moreover, a novel intermediatephase called 'N' phase is found between 23 and 26 T, where
the magnetization varies linearly with magnetic field and the
NMR spectra indicate an inhomogeneous distribution of theinternal magnetic field (Fig. 2). This sequence of phases inFig. 1. Magnetization curves of volborthite measured at 1.4 K on two
piles of single crystals in magnetic fields perpendicular (red line) andparallel (blue line) to the ab plane, and on a polycrystalline sample(green line). Shown also are a typical single crystal of volborthite(upper left) and the arrangement of Cu dx2−y2 orbitals projected onto theab plane in the low-temperature P21/a structure (lower right). J1 and J2
represent the NN and NNN interactions in the Cu2 spin chains, respectively. J' and J" represent the NN interactions between Cu1 and Cu2
spins.

Authors
T. Osada, H. Nakase, F. Uehara, T. Taen, and K. Uchida

Fig. 2. Magnetization curve of single crystals (top, black line) and its
field derivative (bottom) in B ⊥ ab at 1.4 K after the subtraction of the
Van Vleck paramagnetic magnetization (MVV). Magnetization deduced
from the center of the gravity of the NMR spectra is also plotted (top,blue circles). Phase 'N' with a linear field dependence of magnetization
exists between phase II (SDW) and the 1/3 plateau state.

ISSP Activity Report 201517

volborthite bears a striking similarity to those of frustrated
spin chains with a ferromagnetic nearest-neighbor couplingJ 1 competing with an antiferromagnetic next-nearestneighbor coupling J2. This analogy suggests that the N phaseis related to a spin nematic order that is expected to appear in"frustrated" ferromagnets.
How do we understand the appearance of this seriesof magnetic phases in volborthite under magnetic fields?
Among the various possible spin models for volborthite,
we now consider a J1 − J2 − J' − J" model on the distorted
kagome net (see Fig. 1) as the most likely. Using DFT +U calculations, Janson and his coworkers evaluated themagnetic interactions and found that J" is the strongest
antiferromagnetic coupling, which results in a coupled trimer
model [2]. In this model, the 1/3 plateau phase pertains
to polarized magnetic trimers formed by J" bonds. Theirtheoretical considerations also predict the presence of a spin
nematic phase just before the 1/3 saturation, which seems tocorrespond to our N phase.
References[1] H. Ishikawa, M. Yoshida, K. Nawa, M. Jeong, S. Krämer,M. Horvatić, C. Berthier, M. Takigawa, M. Akaki, A. Miyake,
M. Tokunaga, K. Kindo, J. Yamaura, Y. Okamoto, and Z. Hiroi, Phys.
Rev. Lett. 114, 227202 (2015).
[2] O. Janson, S. Furukawa, T. Momoi, P. Sindzingre, J. Richter, and
K. Held, arXiv:1509.07333.
Authors
H. Ishikawa, M. Yoshida, K. Nawa, M. Jeong a , S. Krämer a ,M. Horvatića, C. Berthiera, M. Takigawa, M. Akaki, A. Miyake,
M. Tokunaga, K. Kindo, J. Yamaura, Y. Okamoto, and Z. Hiroia
LNCMI-CNRS, Grenoble

SU(N) Heisenberg Model with
Multicolumn Representations
Kawashima Group
Realization of quantum spin liquid in short-range
coupling models has been a popular research target incondensed-matter physics for several decades. One approachto obtain a spin liquid state is to consider a Hamiltonian withhigher symmetry, which increases quantum fluctuations.
Read and Sachdev generalized the antiferromagnetic Heisenberg into SU(N) symmetry [2]. Based on the 1/N expansion they showed that the ground state of the model with
sufficiently large N is a valence-bond-solid (VBS) ordering
breaking the lattice rotational or the translational symmetry
spontaneously. Recently, in the context of the deconfinedquantum criticality [3], their theory attracts renewed attention. In particular, the existence of an intermediate state,
which might be a spin-liquid state, was discussed near theboundary of Néel and VBS [4,5].
With the famous example of the Haldane gap states, it
is now well-known that the nature of the ground state canstrongly depend on the representation of the symmetry groupeven if the symmetry itself is the same. It also applies tothe present problem. We consider SU(N) Heisenberg modelwith the representation of the Young diagram with a single
row and n columns. Previously, it was found [4,5] that the
Néel state for small N switches to the VBS state for large
N without an intermediate spin liquid state. In the case ofn = 2, 3, 4, however, though the Néel order disappears at
some value of N, no evidence of VBS order has been foundin QMC calculation for the L×L square lattice up to L = 32

18

ISSP Activity Report 2015

Fig. 1. Schematic phase diagram of the SU(N) Heisenberg model on
the square lattice with single-row (m = 1) representations. The phaseboundaries for the case of n = 2,3 are determined in the present study.
In the case of n = 3,4, we do not see clear evidence of the spontaneous
VBS order in the vicinity of the phase boundaries for finite-size QMC
simulations.

[5]. At first sight, this result may appear to suggest an intermediate phase between the Néel phase and the VBS phases.
In the present work [1], we investigate this problem to clarify
whether the intermediate phase exists or not.
First, we examine the case of n = 2. In Fig. 2, we show
the Binder parameter of the VBS order parameter for various
N and L. The Binder parameter should be 1 when the corresponding order exists and 0 otherwise. From the figure, we
see that the VBS order is absent for N = 9 while it exists for
N = 11. While the case N = 10 may seem marginal at the firstsight, it is approaching the value 1 as can be seen in the inset.
From these observations, we conclude that in the case of n
= 2 the ground state is the Néel state for N ≤ 9 , while it is
the nematic VBS state for N ≥ 10. There is no intermediatephase.
For n = 3 and 4, the problem is harder. In the case ofn = 3, while the system size dependence of the Néel orderparameter shows that the Néel states end at N = 14, no clear
VBS order can be seen in our calculation up to L = 128. To
see if this can be regarded as an evidence of the intermediate
spin liquid state, we re-examine the prediction of the large-N
theory [2], and we find a correspondence between the twocases: (n,N) = (2,10) and (3,15). When the order is small,even if it is finite, the numerical estimate shows apparent
1/L decay for small L regime, and eventually deviates fromit. From the known size dependence of the order parameterfor the (2,10) case and the correspondence between the twocases, we estimate the cross-over system size at which thesize dependence starts to deviate from 1/L behavior in the(3,15) case. It turns out that this cross-over size is aroundL = 400, indicating that the order is too small to detect evenFig. 2. The Binder cumulant of the nematic order parameter for themodel with n = 2 for 16 ≤ L ≤ 128. The inset shows size dependence of
the Binder cumulant for N = 10, 11 and 12 in the semi-log scale. The
error bars represent the standard errors.

if it exists as the 1/N theory predicts. The situation is similar
for the n = 4 case.
To summarize, none of the existing evidence contradict
to the absence of the intermediate spin liquid phase, and theabsence is confirmed in the n = 2 case while direct confirmation is still missing for larger n.
References[1] T. Okubo, K. Harada, J. Lou, and N. Kawashima, Phys. Rev. B 92,
134404 (2015)[2] N. Read and S. Sachdev, Phys. Rev. B 42, 4568 (1990); N. Readand S. Sachdev, Nucl. Phys. B 316, 609 (1989).
[3] T. Senthil, A. Vishwanath, L. Balents, S. Sachdev, and M. P. A.
Fisher, Science 303, 1490 (2004).
[4] K. Harada, N. Kawashima, and M. Troyer, Phys. Rev. Lett. 90,
117203 (2003).
[5] N. Kawashima and Y. Tanabe, Phys. Rev. Lett. 98, 057202 (2007).
Authors
T. Okubo, K. Harada, J. Lou, and N. Kawashima

Membrane Tubulation and Polyhedral
Vesicle Formation Inducedby Banana-Shaped Proteins
Noguchi GroupIn living cells, membrane morphology is regulated byvarious proteins. Many membrane reshaping proteins containa Bin/Amphiphysin/Rvs (BAR) domain, which consists ofa banana-shaped rod. The BAR domain bends the biomembrane along the rod axis and the features of this anisotropic
bending have recently been studied. We study as to how sucha local anisotropic curvature induces effective interaction
between proteins and changes the global shape of vesicles
and membrane tubes using meshless membrane simulations.
The proteins are modeled as banana-shaped rods strongly
adhered to the membrane.
Our study revealed that the rods assemble via two continuous directional phase separations in membrane tubes andvesicles unlike a conventional two-dimensional phase separation [1]. As the rod curvature increases, the rods assemble
along the azimuthal direction and subsequently along thelongitudinal direction accompanied by shape transformationof the membrane tube. In the vesicle, in addition to these
two assembly processes, further increase in the rod curvatureinduces tubular scaffold formation. We also found that thepolyhedral vesicles and polygonal tubes are stabilized at highrod densities [2]. The discrete shape transition between triangular and buckled discoidal tubes and between polyhedral
shapes are obtained. As line tension of the membrane edge
is reduced, the protein adhesion induces membrane rupture
leading to high-genus vesicle formation and vesicle inversion [3]. These shape transformations and assemblies are notobtained by isotropic inclusions.
We also studied the effects of the spontaneous (side)curvature perpendicular to the rod, which can be generated
by protein–protein and membrane–protein interactions [4].
We revealed that the perpendicular curvature can drastically alter the tubulation dynamics from a flat membrane
at high protein density whereas no significant difference isobtained at low density. A percolated network is intermediately formed depending on the perpendicular curvature. This
network suppresses tubule protrusion. Thus, this kinetic trap
makes tubule formation significantly slower. The stability of
network structures can be explained by a simple geometricmodel. Positive surface tensions and vesicle membrane
curvature can stabilize this network structure by suppressing
the tubulation. It is known that tubulation dynamics canbe different even for proteins consisting of the same BAR
domains. Our finding suggests that the interactions between
the rest parts of the proteins can give significant effects.
References[1] H. Noguchi, EPL 108, 48001 (2014).
[2] H. Noguchi, J. Chem. Phys. 143, 243109 (2015).
[3] H. Noguchi, Phys. Rev. E to be published (arXiv:1602.04569).
[4] H. Noguchi, Sci. Rep. 6, 20935 (2016).
AuthorH. Noguchi

Formation and Structureof Carbon Dioxide Glass
Yamamuro Group

Fig. 1. Sequential snapshots of tabulation from a flat membrane
induced by protein rods. (a) Positive perpendicular rod curvature. (b)Negative perpendicular rod curvature.

Glass can be recognized as the ‘fourth state of matter’
following gas, liquid, and solid. Compared with the conventional three states, glass is more mysterious and leaves many
unsolved problems from the viewpoint of physics. One of themost important problems is the ‘basic structure of glasses’.
Is it similar to the local structure of the corresponding crystal
or characteristic of the glass such as an icosahedral cluster?
This problem is recently remarked more and more as it has
been understood that the mechanism of the glass transition is
deeply associated with the local and/or medium-range structures of glasses.
For metallic glasses, a bulk glass of tantalum (Ta) was
experimentally obtained recently [1] and its structure wasconfirmed to be an aggregate of icosahedral clusters from themolecular dynamics simulation [2]. On the other hand, forsimple molecular glasses which additionally have an orientational degree of freedom, there have been few structural
works since their glass transition temperatures are very low

ISSP Activity Report 201519

Fig. 1. X-ray diffraction patterns of the vapor-deposited CO2 measured
at 3 K. The red and blue curves represent the data of the as-depositedand 90 K-annealed samples, respectively. The tick marks with Miller
indices show the peak positions calculated from the crystalline data [7]with a space group Pa-3.

and they are readily crystallized on cooling. Our group hasformed several simple molecular glasses by means of a vapor
deposition (VD) method, and investigated their thermal andstructural properties [3-6]. The vapor-deposition is the most
rapid cooling method, in which molecules at a gas state arecondensed on a cold substrate. The cooling rate is estimatedto be higher than 107 Ks-1. In this work, we have tried toform a CO2 glass, which has never been vitrified.
The red curve in Fig. 1 shows the X-ray diffraction
pattern of the as-deposited sample measured at 3 K. Thisdata clearly exhibits a typical halo pattern characteristic ofamorphous structures, indicating that the amorphous form of
CO2 was successfully prepared by the VD method. We would
like to emphasize that this is the simplest molecular glass
ever realized. On heating the VD sample, many Bragg peaks,
which are a direct evidence of crystallization, appeared at 25
K. To obtain the complete crystalline state, the sample wasannealed at 90 K for 5 min and then cooled again to 3 K.
The blue curve in Fig. 1 presents the diffraction pattern of
the annealed sample exhibiting sharp Bragg peaks. The peakFig. 2. Pair distribution functions for glassy, liquid, and crystalline CO2.
The nearest neighbor configuration in crystalline CO2 is schematicallyshown below the graph. The label corresponding to each atomic correlation is depicted in the graph.

20

ISSP Activity Report 2015

positions are well reproduced in terms of the reported crystal
structure (space group Pa-3) [7] as shown by the tick marks
in Fig. 1.
Figure 2 shows the pair distribution functions G(r) of
glassy, liquid, and crystalline CO2. The former two wereobtained by the Fourier transformation of the observed
diffraction data and previous data on liquid CO2 at 220 K
and 0.85 MPa [8]. The G(r) of crystalline CO2 was calculated from the crystal data [7]. The configuration of theneighboring two CO2 molecules in the crystalline state isalso depicted in Fig. 2. The peaks around 1.15 Å and 2.3 Å,which are common in all states, correspond to the C-O andO-O correlations within a molecule, respectively. The G(r)of the glassy sample exhibits a peak around 3.1 Å, while thatof the liquid sample broader peaks around 3.3 Å and 4.0 Å.
It is noteworthy that the peak position of the glassy sample(3.1 Å) coincides with the shortest intermolecular correlation(O1-C2, O1-O3) in the crystalline state. This indicates thatthe glassy CO2 has a strong intermolecular correlation which
is similar to that in crystalline CO2. This is the first experimental evidence for the basic structure of glasses.
References[1] L. Zhong et al., Nature 512, 177 (2014).
[2] J. C. Zhang et al., Mater. Des. 77, 1 (2015).
[3] O. Yamamuro et al., Europhys. Lett. 63, 368 (2003).
[4] O. Yamamuro et al., J. Chem. Phys. 115, 9808 (2001).
[5] O. Yamamuro et al., J. Chem. Phys. 106, 2997 (1997).
[6] S. Tatsumi et al., Phys. Rev. Lett. 109, 045701 (2012).
[7] A. Simon et al., Acta. Cryst. B36, 2750 (1980).
[8] A. K. Adya et al., Mol. Phys. 77, 1217 (1992).
Authors
Y. Mizuno, M. Kofu, and O. Yamamuro

Magnetic Model in Multiferroic
NdFe3(BO3)4 Investigatedby Inelastic Neutron Scattering
Masuda Group
Symmetry breaking of time reversal and space inversion
allows spontaneous order both in magnetism and dielectricity. The enhanced simultaneous order, multiferroics [1],has been extensively studied since the discovery of its experimental realization in the perovskite manganite TbMnO3[2]. The microscopic consideration of electronic states
taking into account a spin-orbit interaction and symmetryof crystals reveals the relationship between the structures ofspin and polarization. So far, in many multiferroic materials,
the complex spin structure of the 3d transition metal ionshas been focused in relation with induced electric polarizations. On the other hand, existence of an interaction between
4f and 3d ions (f-d coupling) and its importance on themultiferroic structure has not been in the spotlight. In thiscontext, an easy-plane type antiferromagnet NdFe3(11BO3)4
provides a simple and interesting playground in which Nd
and Fe moments are simultaneously ordered thorough the
f-d coupling and the polarizations are simply described bya rank two tensor of local magnetic operators. Recently
we performed inelastic neutron scattering (INS) measurements on single crystals of hexagonal NdFe3(11BO3)4 to
explore the magnetic excitations, to establish the underlying
Hamiltonian, and to reveal the detailed nature of hybridization between the 4f and 3d magnetism and its relation toMagnetic Fields up to 370 T
Revealed Aharonov-Bohm Exciton
Splitting in Carbon Nanotubes
Takeyama Group

Fig. 1. Inelastic neutron scattering spectra obtained using HRC, alongthe (a) c* and (b) a* directions. The curves are the calculated spin-wave
dispersions.

the multiferroic structure by using state-of-the-art neutron
spectrometer HRC [3].
The INS spectra projected onto ħω-c* and ħω -a* plane
are shown in Figs. 1(a) and 1(b). We clearly observed thespin waves of the Fe3+ moments around AF zone center at
q = (0,0, −1.5), and the flat excitation at about 1.0 meV fromthe crystal field of Nd3+ ion. Overall spectra are reasonably reproduced by spin-wave calculation including spin
interaction in the framework of weakly coupled Fe3+ chains,
f-d coupling, and single-ion anisotropy derived from the
Nd3+ crystal field. Hybridization between the 4 f and 3d
magnetism is probed as the anticrossing of the Nd- andFe-excitations. The in-plane anisotropy gap at the AF zone
center is explained solely by the crystal field of the Nd3+
ion in the quantitative level. The magnetic anisotropy of
the Fe3+ ion allowed in the crystal structure is found to be
negligibly small after the consideration on dipole-dipole
interaction, single ion anisotropy, and spin nematic interaction as the origin of the in-plane anisotropy. Combinationof the measurements and calculations revealed that the
hybridization between 4 f and 3d magnetism propagates
the local magnetic anisotropy of the Nd3+ ion to the Fe3+
network, resulting in the bulk magnetic structure. In themultiferroics of the spin-dependent metal-ligand hybridization type, the local magnetic anisotropy controls the electric
polarization, meaning that the local symmetry of the rareearth ion is a driving force for the nonlocal multiferroicity in
NdFe3(11BO3)4.
References[1] W. Eerenstein, N. D. Mathur, and J. F. Scott, Nature (London) 442,
759 (2006).
[2] T. Kimura, T. Goto, H. Shintani, K. Ishizaka, T. Arima, andY. Tokura, Nature 426, 55 (2003).
[3] S. Hayashida, M. Soda, S. Itoh, T. Yokoo, K. Ohgushi, D. Kawana,
H. M. Ronnow, and T. Masuda, Phys. Rev. B 92, 054402 (2015).
Authors
S. Hayashida, M. Soda, S. Itoh, T. Yokoo, K. Ohgushi, D. Kawana,
H. M. Ronnow, and T. Masuda

Rolled graphene with a certain chirality vector (n, m)
forms a single-walled carbon nanotube (SWNT), possessing
different electrical properties depending on the chirality,changing from semiconductors to metals. The penetrationof magnetic flux quanta into a SWNT breaks the timereversal symmetry of the electronic states, and the effect isknown as the Aharonov-Bohm (A-B) effect. The quasi-one
dimensionality of SWNTs enhances the effects of exciton as
well as electron correlation in the band-edge optical properties. Owing to the A-B effect, a magnetic flux penetrating
the cross section of a SWNT induces the valley splitting
between the K and K’ points in the Brillouin zone, along witha mixing of the exciton wave functions, and eventually thebright exciton and its dark counter part are converted into
two independent bright K and K’ point excitons in a limitof strong magnetic fields. The k · p theory by Ando [1], haspredicted magnetic field evolution of the K and K’ point
exciton absorption spectra differently, depending on therelative energy-level ordering of the bright and dark bandedge excitons.
We have observed a discernible linear peak splitting of
the K and K’ point exciton absorption spectra of SWNTs
in magagauss magnetic fields above the field where theexciton wave function mixing is over. Highly-selected (6,5)
single-chirality SWNTs synthesized by a single-surfactant
multicolumn-gel-chromatography method [2] were further
processed to highly alignment of the tubes to yield average
29 degrees alignment by a polyvinyl alcohol thin film
stretching.
The thin stretched film sample was set inside of theflux-compression coil with input and output optical fibers insuch a way that magnetic field was oriented along the film
stretching direction (the Voigt configuration). The transmission light was detected by a streak camera equipped witha CCD camera. A streak image of absorption spectra was
obtained in magnetic fields up to around 370 T generated by

Fig. 1. A streak 2-dimensional image of the E22 second sub-band
absorption of (6,5) SWNTs with a signal of magnetic field measured at
300 K. The inset illustrates sample setting with optical fibers inside a
EMFC coil.

ISSP Activity Report 201521

Fig. 2. (a) The band-edge absorption spectra at each magnetic fieldobtained from Fig.1. (b) The absorption intensity evolution in magnetic
fields. The solid lines are the results of fitting using a two-energy
level model (dotted line) modified with a linear B term. Triangles are
obtained by the single-turn coil ultra-high magnetic field generator inmagnetic fields up to 160 T.

the electro-magnetic flux compression ultra-high magnetic
field generator, and the result was shown for the E22 second
sub-band transition of a sample of (6,5) chirality SWNTs in
Fig. 1. Absorption peak centered at 575 nm showed clearly asplitting when the magnetic field exceeds 170 T. The absorption spectra were plotted at each magnetic field strengthfrom Fig. 1, and plotted in Fig. 2(a) with those of Lorentzian de-convolution spectral lines (dotted line). The peakenergy splits linearly with magnetic field with the splitting
Δab = μBeff (where, μ: exciton splitting coefficient = 0.5, Beff
= Bcos(29), and B is the strength of an external magnetic
field) above 150 T. The integrated intensity of the absorption
spectrum of each K and K’ splitting component exhibitedlinear magnetic field dependence above 200 T, but with theirintensity recovers to that of the original peak, respectively,
as seen in Fig. 2(b). Simple two-energy level mixing model
does not hold anymore [3], but should be modified with alinear B term. All these phenomena evolve quite similarly
with those presented by the theory of T. Ando [1]. We havefigured out that the linear term is correlated to the environmental static dielectric constant, and found that the value
amounts to 50, which arises likely from residual watermolecules in hydrophilic PVA film [4].

bank and its field duration is typically from 1 to 100 milliseconds. Because of the extremely short timescale, mostof experiments are difficult to perform, and only selected
measurement techniques (such as magnetization andelectronic resistivity) have been applied in pulsed magnetic
fields. To solve this problem, some facilities in foreigncountries start to utilize a flywheel generator and produces
a “long” pulsed magnetic field that has ~1 second pulsed
field duration. In 2008, International MegaGauss Science
Laboratory at ISSP also installed the 51.3 MW DC flywheel
generator and successfully produced long pulsed magnetic
fields. The use of flywheel generator also enables us togenerate a flat-top pulsed magnetic field (FTPMF) which has
a constant field region around the maximum field. Since the
FTPMF is the most demanding field profile for performinga precise experiment, we are now trying to generate highly
stabilized FTPMFs with a homemade feedback controller.
In this report, we would shortly describe our recent achievement of generating a FTPMF and its application to a scientific research.
Our homemade feedback controller consists of a FPGA
(field programmable gate array) devise and a mini-coilcircuit and is used in conjunction with a commonly usedpulsed magnet[1]. The mini-coil is inserted into a pulsed
magnet and modifies the original pulsed field profile toobtain a FTPMF. In Fig. 1 and 2, we show the generated field
profiles of FTPMFs (60.64 ± 0.005 T for 2 ms and 35.5 ±0.01 T for 90 ms) which are obtained with the mid-pulsed
magnet (36 ms, 60 T) and the long-pulsed magnet (1.2 s,
36 T), respectively. In both cases, an extremely high fieldstability (±0.005~0.01 T) were obtained with feedback
control of magnetic fields (see black curves). Since there iscurrently no alternative way to produce a FTPMF with highstability of the magnetic field, these FTPMFs can be used for
improving the resolution of data with signal averaging or for
performing a slow measurement (such as NMR and specificheat) at unprecedented high magnetic fields. The FTPMF
shown in Fig. 2 is already utilized to perform a collaboration
research and some specific heat data have been obtained. As
shown as the green curve in Fig. 2, the temperature of thesample was recorded as a function of time. During the stabilized FTPMF, we applied heat pulses (ΔQ) to the sample andobserved the resultant temperature jumps (ΔT). From each

References[1] T. Ando, J. Phys. Soc. Jpn. 75, 024707 (2006).
[2] H. Liu et al., Nat. Commun. 2, 309 (2011).
[3] W. Zhou, D. Nakamura, H. Liu, H. Kataura, and S. Takeyama,
Scientific Reports 4, 6999 (2014).
[4] D. Nakamura, T. Sasaki, W. Zhou, H. Liu, H. Kataura, and
S. Takeyama, Phys. Rev. B 91,235427 (2015).
Authors
D. Nakamura and S. Takeyama

Generation of Flat-Top Pulsed
Magnetic Fields at ISSP
Kindo Group
Pulsed magnetic fields are commonly used where
extremely strong magnetic fields are required. However,pulsed magnetic fields only persist for a short period of time
which makes a scientific research difficult to conduct. The
most commonly used pulsed field is driven by a capacitor

22

ISSP Activity Report 2015

Fig. 1. Flattop pulsed field profile generated by 60 T user-coil and 1.2 T
mini-coil. The user-coil and mini-coil were driven by the conventional
capacitance banks and the lead batteries, respectively. The magnetic
field generated by mini-coil is regulated by a homemade feedback
controller and makes the pulsed field profile flat on the top of pulsed
fields. The black (blue) curve is obtained with (without) the feedback
control.

Fig. 2. Flattop pulsed field profile obtained with 36 T long pulsed
magnet and 1.1 T mini-coil, which were driven by the DC flywheel
generator and the lead batteries, respectively. The black curve indicatesa field profile of a stabilized FTPMF. The field profile generated onlywith 36 T long pulsed magnet (no feedback control) is shown by ablue dashed curve. The temperature (green curve) and heat power (notshown) were recorded for the specific heat measurement.

temperature jump, we successfully estimated the specificheat (Cp = ΔQ/ΔT) and obtained several specific heat data
points from a single pulse of magnetic fields.
We are planning to extend the time duration of FTPMF
by a factor of 2 to 3 in 2016. Adding to the specific heatmeasurement, the generation of a highly stabilized FTPMF
may open the way to perform a precise measurement that has
never been possible in pulsed magnetic fields.
Reference[1] Y. Kohama and K. Kindo, Rev. Sci. Instrum. 86, 104701 (2015).

constant in the plateau region (IC3), and decreases to zeroon entering a commensurate (C) phase [3]. Using a pulse
magnet developed at ISSP, we discovered a new multiferroic(MF) phase and discussed the origin of the emergence of theelectric polarization in the chiral magnet CsCuCl3 [4].
Figure 1(b) represents the magnetization (M) of CsCuCl3
at 1.4 K as a function of H applied along the a, b* and caxes, where b* is perpendicular to the ac plane. In addition to
the reported anomalies, we newly observe a jump of M above
the plateau region for H // a or b* axis, which is clearly seen
as a sharp peak in the dM/dH curve in Fig. 1(c). This fieldcorresponds to the phase transition to the C phase. The mostintriguing observation is that the electric polarization along
the a axis (Pa) becomes finite just above the IC3 phase anddisappears in the C phase for H || b*, as shown in Fig. 1(c).
The induced P is as small as ~ 0.25 μC/m2. Figure 1(a) is
the magnetoelectric phase diagram for the Hb*-T plane. The
MF phase is located at H between the upper bound of the M
plateau and the lower bound of the C phase. According toa classical calculation [5], spins in each chain are expected
to form a chiral soliton lattice in this field region. Observation of higher harmonics in neutron diffraction supports
this theoretical prediction [6]. The chiral soliton lattice state
comes to attract considerable attention after its discovery
in metallic CrNb3S6 that belongs to the same point group(622) as that of CsCuCl3 [7]. The present insulating material
exhibits finite electric polarization in the relevant fieldregion. The helical arrangement of Cu ions results in finite
local electric polarization normal to the c axis through thespin current mechanism even in the proper screw-type spinorder because of the non-zero eij × (Si × Sj) term as shownin Fig. 1(d) [4]. This local polarization will be cancelled out
if the helical spin arrangement is incommensurate with thelattice period. In the soliton lattice state, however, distance

Authors
Y. Kohama and K. Kindo

Magnetic Field Induced Polar Phasein the Chiral Magnet CsCuCl3
Tokunaga Group
Among the triangular lattice antiferromagnets, hexagonal
CsCuCl3 has been studied for a long time because of its
interesting crystal and magnetic structures, and magnetic
field induced phenomena. Owing to the Jahn-Teller distortion, Cu chains along the c axis are displaced helicallyin the triangular ab plane and form helices with a six-ion
periodicity. This distortion makes the Dzyaloshinskii-Moriya(DM) interaction active with the D vector pointing to the caxis. The S = 1/2 spins of Cu2+ ions are ferromagneticallyand antiferromagnetically coupled within and between thehelical chains, respectively. The competition of ferromagnetic exchange and DM interaction induces the helical spin
configuration with an incommensurate (IC) magnetic propagation vector (1/3, 1/3, δ = 0.085) below TN ~ 10.7 K atzero field, in which spins lie on the triangular ab plane [1].
The magnetic field (H) applied normal to the c axis induces
a plateau-like behavior in magnetization between 10.5 and14.5 T before the spin saturation at 30 T, while for H // c axis
magnetization shows a jump at 12.5 T [2]. With increasingH ⊥ c, the IC wave number δ decreases to ~ 0.05 at the
beginning of the plateau [IC1 phase in Fig. 1(a)], remains

Fig. 1. (a) Magnetoelectric phase diagram of CsCuCl3 in the Hb*-T
plane. (b) Magnetic field (H) dependence of magnetization (M) of
CsCuCl3 for H parallel to the a, b*, and c axes at 1.4 K. (c) H dependence of dM/dH and electric polarization along the a axis, Pa, of
CsCuCl3 for H // b* at 1.4 K. (d) Schematic of the two nearest interlayer Cu ions (spheres). Two adjacent spins Si and Sj are connectedwith a unit vector eij. (e) Pa(H) curves for the H angle θ ~ –39° and~ 36° in the paramagnetic region T = 50 K.

ISSP Activity Report 201523

between the spin helices (solitons) becomes extremely large,
and as a result, a small perturbation like magnetoelectriceffects of the second order may align the local electric polarization to one direction. This second order effect, which iscalled as a paramagnetoelectric effect, is actually resolved by
our accurate high-field experiments of the magnetoelectriceffects in the paramagnetic phase as shown in Fig. 1(e). The
emergence of electric polarization is thus explained by thecooperation of the local electric polarization on the chiralsolitonic spin arrangement and the paramagnetoelectriceffect. Therefore, we interpret this MF phase in CsCuCl3 as
the polar solitonic phase [4].
References[1] K. Adachi et al., J. Phys. Soc. Jpn. 49, 545 (1980).
[2] H. Nojiri et al., J. Phys. (Paris) 49, C8-1459 (1988).
[3] H. Nojiri et al., Physica B 241-243, 210 (1998).
[4] A. Miyake et al., Phys. Rev. B 92, 100406(R) (2015).
[5] A. E. Jacobs et al., J. Phys. Soc. Jpn. 62, 4066 (1993).
[6] N. Stüβer et al., Physica B 350, e47 (2004).
[7] Y. Togawa et al., Phys. Rev. Lett. 108, 107202 (2012).
Authors
A. Miyake, J. Shibuya, M. Akakia, H. Tanakab and M. Tokunagaa
The University of Tokyo and Osaka UniversitybTokyo Institute of Technology

Novel Spin State Ordering in LaCoO3
Discovered at above 100 T
Y. H. Matsuda and Kindo Groups
In transition metal oxides (TMO), various exotic
phenomena emerge such as superconductivity, colossal
magnetoresistance, metal-insulator transition, multiferroics
and so forth. All these phenomena are considered to origi-

Fig. 1. (a) Schematic drawing of the perovskite structure and electronic
configurations of spin state of LaCoO3 (b) Magnetization (M) and (c)dM/dB curves of LaCoO3 measured using induction method up to 130
T generated with the single turn coil method.

24

ISSP Activity Report 2015

Fig. 2. (a) Magnetic field – Temperature phase diagram of LaCoO3
determined by the magnetization measurements. (b) Tentatively
proposed configurations of the spatial ordering of the spin state andorbitals in LaCoO3.

nate in the electron correlation that gives rise to the quantum
many body effects. Then, the emergent orders appear due tothe coupling of multiple degrees of freedom in solids suchas spin, charge, lattice. Among TMO, cobaltites are regarded
unique for their spin state degree of freedom. For example
in the case of the most intensively studied LaCoO3, theelectronic state of the trivalent cobalt ion (3d 6) is classified
into low spin (LS), intermediate spin (IS) and high spin (HS)state according to the total spin angular momentum S = 0, 1,
2, respectively, based on the single ion picture.
One of the most interesting phenomena expected incobaltites is the ordering of spin states, which is, however,
not observed in general except for the limited cases suchas thin films or special materials. Actually, in the case of
LaCoO3, no order of spin state has been found for more thanhalf a century. LaCoO3 undergoes the anomalous change inthe magnetic and electric properties in the thermal evolution.
In fact, even what kind of spin states are involved is still amajor matter of debate.
Recently, it becomes clear that high magnetic fields canbe used to directly observe the magnetic excited state of
LaCoO3. At ISSP UTokyo in 2009, the magnetization jumpof 0.5 μB/Co at about 60 T was found [1]. At Los AlamosHigh field laboratory in 2012, another magnetization jumpat 70 T was found by measurements up to 100 T [2]. It has
been proposed that the spatial ordering of different spinstate called spin state crystalline (SSC) phase is realized athigh magnetic fields. However, for the confirmation of theSSC, the study up to even more high temperature and highmagnetic fields is needed.
In Fig. 1 (b) and (c), we present the measured magnetization (M) and dM/dB up to 130 T and up to 110 K. We found
an obviously new magnetic phase at above 100 T and atabove 35 K along with the previously found phase of above

65 T and below 35 K in Fig. 2 (a) [3]. We at this moment
are considering the origin of the novel phase as follows. At
the phase (A1), all Co ions are in LS state. With increasing
temperature at the phase (A2), thermally induced IS or HS
of Co ions appears with spatially disordered manner. With
increasing magnetic field, the phase transition from (A2) to(B2) takes place accompanied with the sudden increase of
the number of IS or HS species and also accompanied by theformation of the spatial ordering or IS or HS and LS species,
namely, the SSC. In (B2), further order such as orbitals
may also be possible on the background of the SSC. Withdecreasing temperature, another phase transition takes place
between (B2) and (B1) without changing the magnetization.
At this moment, it is difficult to clarify what is happening
in the phase transition between (B1) and (B2). We note thatthe representative possibilities are the order-disorder phasetransition of orbitals, the switching between the different
orbital order, the switching between the different SSC.
Tentative schematics of such spin state and orbital order are
depicted in Fig. 2 (b).
Actually, the origin of the discovered high field phases(B1) and (B2) in LaCoO3 is still an open question. Besides
the possibilities mentioned above, the possibilities of the
field induced excitonic condensate and the SSC are investigated very recently with the calculations based on the
dynamical mean field theory motivated by the present result[4,5]. For further investigation of the origins of the phase(B1) and (B2), different kind of experimental efforts such as
the magnetostriction, magnetoresistance, x-ray diffraction ateven higher magnetic fields, and the exploration of familymaterials are quite in demand.
References[1] K. Sato, A. Matsuo, K. Kindo, Y. Kobayashi, and K. Asai, J. Phys.
Soc. Jpn. 78, 093702 (2009).
[2] M. M. Altarawneh, G. W. Chern, N. Harrison, C. D. Batista,
A. Uchida, M. Jaime, D. G. Rickel, S. A. Crooker, C. H. Mielke, J. B.
Betts, J. F. Mitchell, and M. J. R. Hoch, Phys. Rev. Lett. 109, 037201(2012).
[3] A. Ikeda, T. Nomura, Y. H. Matsuda, A. Matsuo, K. Kindo and
K. Sato, Phys. Rev. B 93, 220401(R) (2016).
[4] A. Sotnikov and J. Kunes, arXiv:1604.01997.
[5] T. Tatsuno, E. Mizoguchi, J. Nasu, M. Naka, and S. Ishihara,
arXiv:1606.01681.
Authors
A. Ikeda, T. Nomura, Y. H. Matsuda, A. Matsuo, K. Kindo and K. Satoaa
Ibaraki National College of Technology

Fig. 1. (a) Overview of the laser-SARPES system developed at theLaser and Synchrotron Research Laboratory. [1] (b) Schematic
drawing of the photoelectron detection part of laser-SARPES. The
angle between the laser and the analyzer is fixed at 50˚. Twin VLEEDspin detectors arranged with orthogonal geometry are connected tothe hemispherical photoelectron analyzer. The spectrometer is also
equipped with electron deflectors at the multi-electron-lens part
between the sample and the entrance slit.

[1] with high energy (1.7 meV) and angle resolutions (0.7˚)by combining a very-low-energy-electron-diffractiontype (VLEED) spin detector using the oxygen-adsorbed
Fe surface [2] and a high-photon-flux vacuum-ultraviolet(VUV) laser, the 6th harmonic of a basic wave of Nd:YVO4
quasi-continuous wave laser with a non-linear optical crystal
KBe2BOF2. (hν = 6.994 eV) [3]. The spectrometer consistsof a hemispherical photoelectron analyzer equipped with aphotoelectron deflector function and twin VLEED detectors,
as shown in Fig. 1. The latter allows us to analyze the spin
vector of a photoelectron three-dimensionally.
We have shown that the present laser-SARPES machine
realizes a quick SARPES on the spin-split surface band
structure of a Bi(111) film even with 7 meV energy and 0.7˚angular resolutions. Figure 2 demonstrates three-dimensional
detection of the spin polarization on the Bi(111) surface. We
performed three-dimensional SARPES at a point between
Γ and K where we can expect non-zero spin polarizations in the x, y, and z directions because of the absence of
mirror symmetry on the ΓK line of the Bi(111) surface. In
Figs. 2(a)-(f), two spin-polarized surface states, labeled
S1 and S2, are clearly seen, and the amplitude of the spin
vector is summarized in Fig. 2(g). From the spin polarization analysis, we can draw the energy dependence of the spin
vector as in Fig. 2(h).

High-Resolution Three-Dimensional
Spin- and Angle-Resolved
Photoelectron Spectrometer Using
Vacuum Ultraviolet Laser Light
Komori and Shin Groups
Spin-polarized electrons in solids have been intensively
studied not only for fundamental scientific interests but also
for technological applications such as to spintronic devices
utilizing the spin degree of freedom. Recently, highly spinpolarized surface states have been discovered under the
topological concepts associated with the electronic band
structure of materials with strong spin-orbit interaction. Spinand angle-resolved photoelectron spectroscopy (SARPES) isa powerful technique for investigating such spin-dependent
electronic bands. We have constructed a SARPES apparatus

Fig. 2. Spin-polarized surface bands at a point between Γ and K on
the Bi(111) surface detected by the three-dimensional laser-SARPES.
(a-f) The x (a,d), y (b,e) and z (c,f) components of the spin polarizationand the spin-resolved spectra. (g) Amplitude of the spin vector of thephotoelectron emitted with the present experimental geometry shown in
Fig. 1b. (h) Schematic drawing of the spin vector of the photoelectron
emitted from the point between Γ and K as a function of the binding
energy. The length of the arrows is proportional to the amplitude of thespin vector.

ISSP Activity Report 201525

References[1] K. Yaji et. al., Rev. Sci. Instrum. 87, 053111 (2016).
[2] T. Okuda et. al., Rev. Sci. Instrum. 82, 103302 (2011).
[3] T. Kiss et. al., Rev. Sci. Instrum. 73, 1875 (2002).
Authors
K. Yaji, A. Harasawa, K. Kuroda, Y. Ishida, A. Fukushima,
S. Watanabea, C. Chenb, F. Komori, and S. ShinaTokyo University of Scienceb
Beijing Center for Crystal Research and Development, Chinese
Academy of Science

Ultrafast Spin-Switching of a Ferrimagnetic
Alloy at Room Temperature Traced by
Resonant Magneto-Optical Kerr EffectUsing a Seeded Free Electron Laser
I. Matsuda, Wadati, and Shin Groups
Ultrafast spin dynamics in femtosecond timescale,so-called the femtomagnetism, has been one of the central
issues in the frontier science and technology for the lasttwo decades. To capture the nature of the non-equilibrium
dynamics, ultrafast time-resolved experiments have been
carried out using an ultra- short laser pulses. Recently, thedeveloped EUV-X-ray free electron lasers (FEL) and highharmonic generation (HHG) lasers have opened the opportunity for exploring dynamic phenomena with element selectivity by tuning the photon energy of the laser pulses to theabsorption edges of a material. Moreover, since the electron
exchange interactions, the most fundamental origin of themagnetism, occur in the femtosecond time-scales, ultrafast
experiments using FELs and HHG lasers are expected to
add the missing knowledge in condensed matter physics thatshould bring technological innovation in ultrafast spintronics.
One of the famous ultrafast magnetization phenomena
is reversal of GdFeCo ferrimagnetic alloy by opticalpumping. GdFeCo is known as a ferrimagnetic metallic
alloy, composed of rare-earth (RE) and transition metal(TM) sublattices. The two sublattices couple each otheranti-ferromagnetically and spin-switching, induced by afemtoseconds-pulse of either circularly or linearly polarized
infrared light, has already been reported. However, there iscontroversy in the suggested dynamical mechanisms andit was proposed recently that the magnetization reversal

Fig. 1. (a) Experimental results (circles) of the intensity variation

with rotation angle taken at hv = 53eV for FEL at each delay timeshown in each figure with fitting by cosine curve (solid lines). (b)A schematic diagram of the magnetization reversal dynamics of the
Fe magnetic moment with respect to an external field H. The lengthof the arrows is scaled to the magnitude of the Kerr rotation angle
at each delay time shown in (a).

26

ISSP Activity Report 2015

process is thermal and the reversal can be explained in termsof the angular momentum conservation when the material
is irradiated by circular polarized light. More experimental
data, in particular using linearly polarized light, are needed
to understand the nature of these opto-magnetic phenomena.
In the present study, we extended our resonant magnetooptical Kerr effect (RMOKE) technique for FELs to trace thespin in the Fe (TM) site in a GdFeCo crystal.
The experiment was performed at FERMI@ELETTRA
in Italy by bring our homemade measurement system to
the FEL end-station. The Kerr-rotation angle of RMOKE
was determined by rotating-analyzer ellipsomtry (RAE)
method and time-resolved measurement was carried out by
the pump (Ti:S laser) and probe (seeded FEL) technique.
Before optical pumping, a sample was set at room temperature, which is above the magnetic compensation temperatureof GdFeCo at 250 K and the external magnetic field wasapplied in the direction of the initial Fe magnetization. Then,the Fe magnetization reversal was traced in real time bytuning the photon energy (hv = 53 eV) to the Fe M-absorption edge, which added the element-selectively.
Figure 1(a) shows the results of time-resolved measurements. Each panel shows the RAE results at each indicateddelay time. The vertical axis denotes the normalized photon
intensity. The two curves (blue and red) correspond to themeasurements under the applied magnetic field in up anddown direction along the sample surface normal. The solidlines are cosine fitting to the experimental results. The
angle zero in each panel corresponds to the extinction state
without external field. The Kerr rotation angle at each delay
time can be extracted from the phase difference between thetwo curves. The initial Kerr rotation angle was 3.2 degree
at -100 fs (before pumping), which was also measured in
the static RMOKE (not shown). Since a polar geometry isused in this TR-RMOKE measurement, the Kerr rotation
angle indicates the out-of-plane magnetic moment of Fe in
GdFeCo. Figure 1(b) schematically depicts the magnetization dynamics with respect to the external field resulting
from the time dependent Kerr rotation angle. The length of
the arrows in the figure corresponds to the magnitude of theKerr rotation angle for each delay time. At 200 fs after theintense laser irradiation, changes of sign of the Kerr rotation
angle indicate reversal of Fe magnetization. This reversal
mechanism is classified in thermal process, being different
from the process involving the inverse Faraday effect in theprevious studies using circularly polarized light. Considering
the FEL repetition rate of 10 Hz at FERMI@ELETTRA
the Fe magnetic moment is recovered at least 100 ms after
the pump. Since linearly polarized IR pump laser was used
there is no coupling in terms of the exchange of angularmomentum between photons and spins in the material.
This means that the path for angular momentum transfer isclosed between the sub-lattices of Gd and Fe. The timescaleof magnetization reversal of TM sublattice is the same as
observed in preceding research using time-resolved XMCD,
in which transient ferromagnetic-like coupling has been
observed due to different demagnetization times for RE andTM sublattices. Our measurement of TR-RMOKE reveals its
compatibility with FEL for tracing ultrafast spin dynamics.
References[1] Sh. Yamamoto et al., Rev. Sci. Instrum. 86, 083901 (2015).
[2] Sh. Yamamoto et al., Phys. Rev. B 89, 064423 (2014).
Authors
Sh. Yamamoto, M. Taguchi a , T. Someya, Y. Kubota, S. Ito,
H. Wadati, M. Fujisawa, F. Capotondib, E. Pedersolib, M. Manfreddab,

L. Raimondib, Maya Kiskinovab, c, J. Fujiid, P. Morasd, T. Tsuyama,
T. Nakamurae, T. Katof, T. Higashidef, S. Iwataf, S. Yamamoto, S. Shin,and I. MatsudaaNara Institute of Science and TechnologybElettra-Sincrotrone TriestecDipartimento di Fisica, Universita’ degli Studi di TriestedIstituto Officina dei Materiali, Consiglio Nazionale delle RicercheeJapan Synchrotron Radiation Research Institute/SPring-8
fNagoya University

Optically Detecting Edge-State ofTopological Insulator under the Ambient
Condition by Ultrafast Infrared
Photoluminescence Spectroscopy
Suemoto and I. Matsuda Groups
Three-dimensional topological insulators (TIs) arematerials characterized by insulating bulk bands and metallic
surface states resulting from a nontrivial topology of thebulk wave functions. The surface states form a Dirac cone
structure with electron spins locked perpendicular to their
momenta within the bulk band gap. The helical spin structure, which suppresses electron backscattering induced bynonmagnetic impurities, proposes electronic and spintronic
device applications of TIs. The robustness of topologicallyprotected surface states under exposure to air furthermore
offers to realize versatile TI devices operating under theambient environment. It is therefore crucial for the device
applications to investigate dynamical properties of surface
carriers in TIs particularly under the ambient condition.
Recently the surface carrier dynamics has been explored withultrafast time-resolved techniques allowing for distinguishing
the bulk and surface response, involving time- and angleresolved photoemission spectroscopy (TrARPES), opticalpump mid-infrared probe spectroscopy (OPMP), and opticalpump THz probe spectroscopy (OPTP). TrARPES has beenutilized to observe directly the transient electron population
with the high momentum and energy resolution, providing
knowledge about the electron-phonon scattering and thebulk-surface interband transition in TIs. TrARPES, however,needs the ultra-high vacuum condition to prevent the surface
contamination of samples due to the surface sensitivity. In
contrast, OPMP and OPTP have delivered insights into thelow-energy electronic transition in the surface Dirac coneeven under the atmospheric condition with larger penetration depth than that in TrARPES experiments, while being
incapable of direct access to excited states over a wide
energy range from the surface states to the bulk bands.
Time-resolved photoluminescence spectroscopy (TrLS)
overcomes their drawbacks with the bulk sensitivity and thewide-range detection of excited states in visible to infrared
regions. TrLS combined with time-resolved photoemission
spectroscopy (TrPES) has been applied to graphite, providing
deep understanding on the carrier dynamics in the Dirac cone[1]. TrLS is therefore urgently expected to be a practical
approach even to surface carrier transitions in TIs under theambient consition; however, no TI research with TrLS has
been reported. Here, we report an application of the infrared
TrLS technique to a TI TlBiSe2 under the ambient condition(inset in Fig.1).
A TI TlBiSe2 is known to feature the Dirac point locatednear the middle point of the bulk band gap of 0.35 eV atthe Γ̅ point, which is a large value among TIs. We used

Tl1-xBi1+xSe2 (x = 0.025) synthesized by the Bridgman
method as the sample, where the Fermi-level is locatednear the Dirac point. The infrared time-resolved luminescence measurement was performed with the up-conversion
technique under the ambient condition. The TlBiSe2 sample
was excited by 70 fs pulses at a wavelength of 800 nm(1.55 eV) from Ti:sapphire regenerative amplifier operating
at a repetition rate of 200 kHz. The spot size on the sample
was approximately 300 μm in diameter and the fluence wasestimated to be 0.34 mJ/cm2. The visible light was generated by sum-frequency mixing of the infrared luminescencelight and the gating pulses at 1.55 eV in an optical nonlinear
crystal LiIO3, and detected by a photomultiplier tube coupledwith a double grating monochromator. The time resolution
estimated by autocorrelation of the pump pulse reflectedby the sample and the gating pulse was 168 fs. The energy
resolution was approximately 70 meV. The up-conversion
measuring system had sensitivity for the luminescencephotons between 0.23 eV and 1.3 eV. The spectral sensitivityof the system was calibrated by using the sum-frequency
signal between the light from a tungsten lamp with asapphire window and the gating pulses at 1.55 eV.
Figure 1 shows time evolution curves of the luminescence intensities from the TlBiSe 2 crystal at emission
photon energy ranging from 0.25 eV to 1.0 eV under the
1.55 eV-photoexcitation. The decay profiles exhibit specifically different shapes with the photon energy. As photon
energy decreases from 1.0 eV, the peak position time
becomes longer with decrease of the photon energy. Thisbehaviour can be explained in terms of the bulk insulating
property: the carriers are accumulated at the bottom of theFig. 1. Time evolution curves of the luminescence intensities from
TlBiSe2 at emission photon energy ranging from 0.25 eV to 1.0 eV
under 1.55 eV-photoexcitation. The curves are normalized at theirown maxima and offset for clarity of display. The curves at lower
photon energy than bulk band gap of 0.35 eV are shown in blue. The
green arrows indicate the peak position of each curve. The inset shows
schematic drawing of the infrared photoluminescence measurement
under 1.55 eV (800 nm) pulse excitation.

ISSP Activity Report 201527

bulk bands due to the energy band gap, which obstructs
phonon-mediated recombination between electrons andholes. The longer decay time at lower photon energy is attributed to slower relaxation of the carrier population at lower
energy, reflecting the cooling dynamics of the carriers via
carrier-phonon interactions. On the other hand, when thephoton energy is lower than the bulk band gap of 0.35eV,
distinctive decay profiles with much longer decay times(approximately 4 ps) are found at 0.25 eV and 0.3 eV. The
decay profile at 0.4 eV, which corresponds to the turning
point of the shape change of the decay profiles, consists of
two components similar to each decay profile at 0.3 eV and
0.5 eV.
The distinctive shape change of the luminescence decay
profiles and the bimodality of the time-resolved luminescence spectra elucidate that the luminescence originates fromdifferent energy bands. According to the band calculations,no bulk state resides in the energy band gap region less than
0.6 eV, except each one around the Γ̅ point (0.35 eV) and theM̅ point (0.3 eV)[2]. The bulk band around the M̅ point might
contribute to the luminescence at photon energy even below
the bulk band gap of 0.35 eV; however, the decay profile atthe photon energy of 0.3 eV that matches the energy band
gap at the M̅ point does not exhibit a rapid rise expected fromthe bulk insulating property[3]. The decay profiles at thephoton energy below the bulk band gap of 0.35 eV are therefore attributed to the luminescence predominantly derived
from the surface states. The quantitative analyses, based on
the rate-equation model, also confirmed this assignment [3].
The topologically protected surface states were opticallydetected even under the ambient condition, and the relaxation
rate of the surface carriers was determined, distinguishedfrom the bulk contribution simply with the emission photon
energy. Our results present the availability of the infrared
TrLS technique as a novel approach to the dynamical properties of the surface carriers in TIs toward their application toelectronic and spintronic devices operating under the ambientenvironment.
References[1] T. Suemoto et al., Phys. Rev. B 87, 224302 (2013).
[2] K. Kuroda et al., Phys. Rev. Lett. 105,146801 (2010).
[3] S. Maezawa et al., Sci. Rep. 5, 16443 (2015).
Authors
S. Maezawa, H. Watanabe, M. Takeda, T. Someya, K. Kuroda,
I. Matsuda, and T. Suemoto

Development of Sub-300 fs, 100-W Class,
Yb-Fiber Based CPA Laser System at 1-MHz
Kobayashi GroupHigh repetition rate (>MHz) high harmonics generation (HHG) based vacuum ultraviolet (VUV) laser source ishighly desirable for photoelectron spectroscopy, for spacecharge-free measurement by limiting the number of emitted
electrons per pulse, which can lead to higher signal-to-noiseratios and achieve high energy resolution. Traditionally,Ti:sapphire laser systems were adopted as the driver, which,however, typically have a repetition rate on the order of a few
kilohertz, or hundred kilohertz at the expense of the pulse
energy. That is mainly limited by the poor thermal conductivity of the Ti:sapphire crystal itself. Even with the state-of-

28

ISSP Activity Report 2015

Fig. 1. (a), Power performance of the FCPA system; (b), Spectra takenfrom different stages of amplification; (c), Pulse intensity and phaseobtained from the SHG-FROG measurement; (d), Power stability of thefiber CPA laser system and beam profile.

the-art cryogenic configuration, the average power is limited
at a few tens of watts.
As far as high repetition rate, high average power lasers
are concerned, Yb-based fiber, slab, and disk lasers areleading the trend in this field and all three have enabled >1
kW of average output power, due to their advanced heatdissipating ability. Comparatively speaking, slab lasers
and disk lasers give pulse duration on the order of few
picosecond or sub-picosecond. While, fiber lasers, due to thebroader gain bandwidth they can support, can give shorter
pulse duration. Unfavorably, due to the small core diameterof gain fibers, the peak powers reached inside the fiber are
high and unwanted nonlinear effects, such as self-phasemodulation, tend to occur. Hence, in order to avoid possible
nonlinearities, the pulse duration of a seed laser needs to be
stretched before it is amplified by a fiber amplifier. Although
there have been some reports on high average power 1-MHz
fiber chirped pulse amplification (FCPA) lasers, their pulse
duration were limited to ~500 fs.
Here we report on a FCPA laser system, which delivered 100 W of output power after a pulse compressor, at arepetition rate of 1 MHz, corresponding to a pulse energyof 100 µJ. The compressor efficiency was as high as 85%
thanks to the special large scale transmission gratings. The
pulse duration was measured to be 270 fs using second
harmonic generation frequency-resolved optical gating(SHG-FROG) method. To the best of our knowledge, thisrepresents the shortest pulse duration achieved by a hundredwatt-level fiber chirped pulse amplification laser system at
few MHz repetition rate, without resorting to any means of
post-compression and SLM-based phase compensation. The
excellent beam quality was guaranteed by the rod fiber itself
and by careful alignment into this fiber to effectively excite
the fundamental mode alone.
The FCPA system started from a mode-locked 64-MHz
Yb:fiber oscillator with an average power of 5 mW. This seedlaser was then directed to a grating based pulse stretcher,and stretched to be ~1 ns. A single mode Yb pre-amplifier
followed the stretcher to boost the power up to ~100 mW.
An acoustic optical modulator (AOM) was used to lower
the repetition rate down to 1 MHz. Meanwhile, the average
power was decreased to 0.5 mW. Additional two-stage
pre-amplifiers increased the average power to 500 mW,
which then seeded the following 40/200 photonic crystal
fiber (PCF) amplifier that was pumped in the backward

direction by a 25 W laser diode at 976nm. The final
stage amplifier was a straight 55 cm rod fiber from NKT
Photoncis, pumped by a fiber coupled 350-W laser diodecentered at 976 nm. With a seed laser of 13W, more than 120
W average power was extracted when backward pumping at~200 W was used, shown in Fig.1(a). The optical-to-optical
efficiency was in excess of 60%. After compressor, morethan 100 W of average power were obtained, corresponding
to an efficiency of ~85% for the compressor. Fig.1(b) shows
the spectrum taken after different amplifier stages. Only
minor gain narrowing effects were visible. Figure 1(c) shows
the measured pulse duration of ~270 fs. Figure 1(d) shows
2-hours operation of the system.
In the future, we would like to use this laser system todrive HHG process. By that, high repetition rate VUV laser
could be expected soon.
Reference[1] Z. Zhao and Y. Kobayashi, Appl. Phys. Express. 9, 012701 (2016).
Authors
Z. Zhao, and Y. Kobayashi

Observation of a Devil’s Staircase in theNovel Spin-Valve System SrCo6O11
Wadati Group
Combining different materials in artificial nanostructures
is a most important approach to create improved or evencompletely new electronic functionalities for technologicalapplications. A very prominent example of this is the giant
magnetoresistance (GMR), which was first realized bymultilayers of alternating nonmagnetic and ferromagnetic
metals [1] and which now is an indispensable part of today’s
information technology. In these GMR systems the electricalresistance is high for an antiparallel alignment of the magnetization in the neighboring magnetic layers, while it is low
for a parallel alignment of those magnetizations. For thisreason such systems are also referred to as spin valves.
Here we report on a high-resolution resonant soft x-ray
scattering (RSXS) study of SrCo6O11 bulk single crystals
as a function of temperature (T) and applied magnetic field(H) [2]. SrCo6O11 is a particularly interesting material withintrinsic magnetoresistance. Figure 1 (a) shows the lattice
structure, which is believed to realize a GMR multilayer
system at the atomic scale [3]. One of the most striking
magnetic features of SrCo6O11 observed so far are plateaus in
the magnetization as a function of the applied magnetic fieldalong the c axis as shown in Fig. 1 (b). These plateaus correspond to 1/3 and 3/3 of the saturated moment and were foundFig. 2. (a) Magnetic peak profile of SrCo6O11 at various temperatures atzero magnetic field. (b) Magnetic phase diagram of SrCo6O11.

to reflect different stackings along c, namely, an up-up-up
structure for the 3/3 phase and an up-up-down configuration
for the 1/3 phase.
Figure 2 (a) shows the diffraction peaks of SrCo6O11 atzero field for various temperatures. Quite surprisingly andvery uncommon for RSXS experiments, a large number ofsuperlattice reflections at L = n/6 with n = 4, 5, 6, 7, 8 and 9
is observed. L = 1 commensurate (CM) peak and two incommensurate (ICM) peaks around L = 0.8, 1.2 appear at 20 K
(Tc1). These ICM peaks move to L = 5/6 and 7/6, respectively, as the temperature is decreased, and finally are locked
at these values at 12 K (Tc2), respectively. At Tc2, there
appear L = 6/5 and 8/7 shoulders of the L = 7/6, and, simultaneously, L = 2/3, 4/3, and 3/2 peaks. These results therefore directly reveal that a large number of magnetic phases
coexist in zero magnetic field.
Figure 2 (b) shows the entire H-T diagram of SrCo6O11
determined by RSXS measurements under magnetic fields.
Here, <n> represents the magnetic periodicities. The phase
diagram demonstrates that various magnetic orderings withdifferent periodicities are formed in the low temperature andlow field region. Obviously, the energies of these magnetic
structures are quite close, and the corresponding energy
differences sensitively depend on temperature and magnetic
fields. This phenomenon is called “the devil’s staircase,”
where, in principle, an infinite number of commensurate
superstructures can be realized by tuning an external parameter. As these corresponding eigenstates (magnetic orderingsin this case) have similar energies, they can be switchedfrom one to another by small perturbation. In this caseof magnetic ordering, the mechanism is described by theaxial next-nearest-neighboring Ising (ANNNI) model. The
ANNNI model describes competing interactions between
nearest (J1) and next-nearest (J2) Ising spins, which yields
various magnetic orderings with close energies in thephase diagram of temperature and J2/J1. However, in order
to explain ordered structures with long periodicities, one
needs magnetic interactions that go well beyond the nearest
neighbors. A plausible explanation can be provided by the
Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction via themetallic planes.
References[1] M. N. Baibich, J. M. Broto, A. Fert, F. Nguyen Van Dau, F. Petroff,
P. Etienne, G. Creuzet, A. Friederich, and J. Chazelas, Phys. Rev. Lett.
61, 2472 (1988).
[2] T. Matsuda, S. Partzsch, T. Tsuyama, E. Schierle, E. Weschke,
J. Geck, T. Saito, S. Ishiwata, Y. Tokura, and H. Wadati, Phys. Rev.
Lett. 114, 236403 (2015).
[3] S. Ishiwata, I. Terasaki, F. Ishii, N. Nagaosa, H. Mukuda,
Y. Kitaoka, T. Saito, and M. Takano, Phys. Rev. Lett. 98, 217201(2007).

Fig. 1. (a) Crystal structure of SrCo6O11. (b) Out-of-plane magnetization of Sr1−xBaxCo6O11 as a function of magnetic field (H // c) at 5 K.

Authors
T. Matsudaa, S. Partzschb, T. Tsuyama, E. Schierlec, E. Weschkec,
J. Geckb, T. Saitod, S. Ishiwataa, Y. Tokuraa,e, and H. Wadati

ISSP Activity Report 201529

aDepartment of Applied Physics and Quantum-Phase Electronics
Center (QPEC), the University of Tokyob
Leibniz Institute for Solid State and Materials Research IFW DresdencHelmholtz-Zentrum Berlin für Materialien und EnergiedInstitute for Chemical Research, Kyoto Universitye
RIKEN Center for Emergent Matter Science (CEMS)

Quadratic Fermi Node in a 3D
Strongly Correlated Semimetal
Kondo, Nakatsuji, and Shin Groups
Strong spin–orbit coupling fosters exotic electronic
states such as topological insulators and superconductors, but the combination of strong spin–orbit and strong
electron–electron interactions is just beginning to be understood. Central to this emerging area are the 5d transition
metal iridium oxides [1-4]. Here, in the pyrochlore iridate
Pr2Ir2O7, we identify a non-trivial state with a single-point
Fermi node protected by cubic and time-reversal symmetries, using a combination of angle-resolved photoemission
spectroscopy and first-principles calculations. Owing to its
quadratic dispersion, the unique coincidence of four degenerate states at the Fermi energy, and strong Coulomb interactions, non-Fermi liquid behavior is predicted, for which weobserve some evidence. Our discovery implies that Pr2Ir2O7
is a parent state that can be manipulated to produce otherstrongly correlated topological phases, such as topologicalMott insulator, Weyl semimetal, and quantum spin andanomalous Hall states.
The experimental evidence for a quadratic Fermi nodestate in Pr2Ir2O7 is demonstrated in Fig. 2. In the panel (d),we observe that a parabolic energy-dispersion approaches EF
with increasing photon energies (or kz values), and finally
touches it at the Γ point (a red curve). We have confirmed
that, with further increase of kz, the dispersion gets awayfrom EF again, which signifies that the 3D band structureof Pr2Ir2O7 has a single Fermi point (Fig. 2(b)). Other scansFig. 2. Fermi node state of Pr 2Ir 2O 7 revealed by ARPES withsynchrotron radiation source. (a) Brillouin zone, showing measured
momentum sheets. (b,c) ARPES intensities at EF in the kx-ky sheet
crossing Γ and L measured at hv=52eV and 39eV, respectively. The
calculated band dispersion in the kx-k(111) sheet. Energy dispersions
determined by ARPES are plotted on it. (e) ARPES dispersion map
crossing Γ, measured at an elevated temperature (T=75K).

of different kz values up to the L point (Fig.(c)) revealed noother states touching or crossing EF. This circumstance satisfies the charge neutrality, and it could be a further evidence
for the realization of nodal state. We also find that the broad
spectral weight emerges beyond EF as seen in the Fermifunction-divided image for the 75K data (arrow in Fig. 2(e)).
This observation is compatible with the predicted existenceof a quadratic band touching on the unoccupied side.
References[1] B. J. Kim et al., Science 323, 1329 (2009).
[2] Y. Machida et al., Nature 463, 210 (2009).
[3] D. Pesin et al., Nature Physics 6, 376 (2010).
[4] X. Wan et al., Phys. Rev. B 83, 205101 (2011).
[5] T. Kondo et al., Nature communications 6, 10042 (2015).
Authors
T. Kondo, M. Nakayama, R. Chena, J. J. Ishikawa, E.-G. Moona,
T. Yamamoto, Y. Ota, W. Malaeb, H. Kanai, Y. Nakashima, Y. Ishida,
R. Yoshida, H. Yamamoto, M. Matsunamib, S. Kimurab, N. Inamic,
K. Onoc, H. Kumigashirac, S. Nakatsuji, L. Balentsa , and S. Shina
University of Californiab
UVSOR Facility, Institute for Molecular SciencecHigh Energy Accelerator Research Organization (KEK)

Fig. 1. Quadratic Fermi node state of Pr2Ir2O7 tunable into interacting
topological phases. In the lower part of the diagram, the bottom halfof the blue circle and its reflection form a caricature of the quadratically dispersion conduction and valence bands touching at the zone
centre, while at the same time the darker-blue upper circle suggests how
Pr2Ir2O7, with non-negligible Coulomb interactions, is a strongly correlated non-Fermi liquid analogue of HgTe, shown as a pale-blue reflection. Arrows indicate the perturbations that convert the nodal non-Fermi
liquid state to diverse topological phases.

30

ISSP Activity Report 2015

ISSP Activity Report 201531

Joint Research Highlights
Observation of the Orbital Quantum
Dynamics in the Spin-1/2 Hexagonal
Antiferromagnet Ba3CuSb2O9
M. Hagiwara and S. Nakatsuji
In condensed matter physics, exploration of a novel
quantum liquid state, such as Bose-Einstein condensationof cold atoms, superconductivity and quantum Hall state ofelectron systems, has been a subject of intense research bothexperimentally and theoretically. While many candidates of“quantum spin liquid” in which spin degrees of freedom does
not freeze even at very low temperatures have been reported,
almost no example has been found for an orbital liquid state,
where the orbital degree of freedom remain fluctuating
without lattice deformation down to a very low temperature.
In our previous studies on the copper oxide 6H- Ba3CuSb2O9
with a perovskite structure, we reported the first observation of striking absence of the static Jahn-Teller distortion
down to the lowest temperature in this oxide based on copper(II), which is known as a strong Jahn-Teller active ion [1,2].
However, to date, the orbital dynamics have never been
investigated.
In the present study, we have determined the frequency ofthe orbital quantum fluctuation in this compound by multifrequency electron spin resonance (ESR) measurements
in high magnetic fields [3]. We report the first determination of the orbital fluctuating frequencies, namely dynamic
Jahn-Teller frequencies, at wide temperature range between
1.5 K and 100 K. The aforementioned results pave the way
to investigate the dynamics of a new quantum liquid statenamed “quantum spin-orbital liquid” by multi-frequency
ESR in high magnetic fields. The results demonstrate howhigh magnetic fields are useful for the studies on a quantum
spin-orbital-liquid state.

Fig. 1. The possible dynamic orbital states in the hexagonal sample,
which form resonating singlet dimers in the honeycomb-based lattice.
The light blue ovals show the temporally averaged special distributionof the copper orbitals.

32

ISSP Activity Report 2015

Fig. 2. Temperature dependence of the dynamic Jahn-Teller fluctuating frequency (νJT) determined from the observed electromagnetic
frequency (νEM) where the ESR signal line shape changes fromsymmetric to asymmetric. The solid circles show the fluctuating
frequencies at measurement temperatures, and the frequencies become
constant (about 10 GHz, 100 picosecond) below 20 K, indicating theformation of the quantum liquid state.
References[1] S. Nakatsuji et al., Science 336, 559 (2012).
[2] N. Katayama et al., Proc. Natl. Acad. Sci. USA, 112, 9305 (2015).
[3] Y. Han et al., Phys. Rev. B 92, 180410R (2015).
Authors
M. Hagiwaraa and S. Nakatsuji
aOsaka University

Copper Oxide with No Static
Jahn-Teller Distortion
N. Katayama, H. Sawa, and S. Nakatsuji
The quantum spin liquid (QSL) state has been intensively
pursued since Anderson proposed the resonating valencebond model. For realizing a novel QSL state, orbital degreeof freedom has been considered as a nuisance because orbital
ordering usually appears at high temperature accompanying
with a cooperative Jahn-Teller (JT) distortion and spinordering. Therefore, the QSL candidates found so far havebeen mostly in spin only systems without orbital degree of
freedom.
Perovskite-type 6H-Ba3CuSb2O9 is a novel candidate
material for the spin-orbital liquid state, which we havereported recently [1]. In the material, spin-orbital shortrange ordering occurs in the short-range honeycomb latticeof Cu2+ with eg orbital degrees of freedom, as shown in
Fig.1(a). Powder x-ray diffraction experiment shows thateven at low temperatures, the hexagonal components remainalong with some orthorhombically distorted components.
In the hexagonal phase, three-fold symmetry exists for the
Cu2+ sites which are surrounded by octahedrally coordinatedoxygen, indicating the absence of a cooperative JT distortion.

Fig. 1. (a) Schematic view of the local structure for hexagonal andorthorhombic samples. (b) Schematic picture of a non-cooperative
static JT distortion. (c) and (d) Schematic pictures of spin-singlet
formation in short-range honeycomb lattices of Cu2+ for (c) hexagonal
and (d) orthorhombic samples.

To explain this unusual feature, we proposed two possible
scenarios. (i) Orbital glass state with a non-cooperative static
JT distortion. In this scenario, the local symmetry is loweredby a static JT distortion, as schematically shown in Fig.1(b),but the overall hexagonal symmetry remains. (ii) Spin-orbital
liquid state. The static JT distortion is absent and instead, adynamic JT distortion appears, leading to a novel spin-orbital
liquid state, as depicted in Fig. 1(c). These two possible
scenarios cannot be distinguished by experimental results
using powder specimens alone. A thorough structural study
using a single crystal without orthorhombic components isrequired.
Our progress in preparing single crystalline samples
enabled us to obtain single crystalline samples without any
orthorhombic components down to the lowest temperature.
Figures 2(a) and 2(b) show single crystal x-ray diffraction

Fig. 2. Single crystal x-ray diffraction proﬁles for (a-b) hexagonal and(c-d) orthorhombic samples. The insets in (a) and (c) are photographsof the transparent brown single crystals for the hexagonal and orthorhombic samples, respectively. The hexagonal samples are darker thanthe orthorhombic samples.

experimental data. The peaks show no signs of splitting or
broadening down to 20 K, the lowest temperature of ourmeasurements (“hexagonal sample”). The hexagonal sample
can be well reﬁned by using the centro-symmetric spacegroup P63/mmc for all temperatures. For P63/mmc, the threefold symmetry is retained for Cu2+ sites, indicating theabsence of the cooperative JT distortion. These observations
are in sharp contrast with our previous single crystal x-ray
diffraction study of 6H-Ba3CuSb2O9. There, we reported thatthe Bragg peak splits into several separate reﬂections upondecreasing temperature, as shown in Figs. 2(c) and 2(d).
This result indicates that the hexagonal P63/mmc symmetryis lowered to the orthorhombic Cmcm symmetry (“orthorhombic sample”). We attribute this effect to a cooperative JT
distortion induced by uniform ferro-orbital ordering of Cu2+ions (Fig.1(d)).
While x-ray diffraction experiment gives us the averaged
structural information, the electron spin resonance (ESR)
enables us to study the local orbital conﬁguration. Using
the single crystals, we confirmed the isotropic g factors
are realized within the in-plane directions in the hexagonal samples down to 3.5 K, clearly indicating that the
non-cooperative JT scenario is not realized and instead, adynamic JT distortion appears [2]. Further studies using
the crystals will address the open questions on the quantum
spin-orbital liquid state, such as the orbital dynamics and themechanism to stabilize such an exotic liquid state.
References[1] S. Nakatsuji et al., Science 336, 559 (2012).
[2] N. Katayama et al., Proc. Natl. Acad. Sci. USA, 112, 9305 (2015).
Authors
N. Katayamaa, H. Sawaa and S. NakatsujiaNagoya University

Shot Noise Measurement of Local
Fermi Liquid Out of Equilibrium
R. Sakano, M. Ferrier, and K. Kobayashi
Nine years after Millikan’s monumental work on firstobservation of the elementary charge of the electron e in the
famous oil drop experiment in 1909, Schottky also proposed
an idea of measuring electric charge from the electron flow
generated between two electrodes in a vacuum tube, by using
statistical properties of electron counting and its fluctuation.
For electric current generated by rare events (Poissonian
process), the average current (I) is proportional to its fluctuations, namely, the shot noise (S), through the relation S =2e*I where e* is the effective charge of the current carrying
state.
Particularly, in condensed matter physics, many-bodyeffect in conductor can generate nontrivial effective chargesof their quasiparticle state, which has been studied in nanosized electronic devices. For instance, fractional charges of
Laughlin’s quasiparticle in fractional quantum Hall systems,
and double charge of cooper-pair in normal metal-superconductor junction were already detected in noise experiments.
By means of ultrasensitive current-noise measurement
techniques, we recently succeeded in observing the shotnoise and formation of effective charge states due to the spin
Kondo effect in a carbon-nanotube quantum-dot, which isanother typical many-body effect [1]. Applying small bias
voltages between two electrodes connected to the quantum

ISSP Activity Report 201533

References[1] M. Ferrier T. Arakawa, T. Hata, R. Fujiwara, R. Delagrange,
R. Weil, R. Deblock, A. Oguri, and K. Kobayashi, Nat. Phys. 12, 230(2016).
[2] E. Sela Y. Oreg, F. von Oppen, and J. Koch, Phys. Rev. Lett. 97,
086601 (2006).
[3] A. O. Gogolin and A. Komnik, Phys. Rev. Lett. 97, 016602 (2006).
[4] R. Sakano, T. Fujii, and A. Oguri, Phys. Rev. B 83, 075440 (2011).
Authors
R. Sakano, M. Ferriera,b, T. Arakawaa, T. Hataa, A. Oguric, andK. Kobayashia
aOsaka university
bUniversity of Paris-Sud
cOsaka city university
Fig. 1. The red solid line is the measured shot noise Sb as a function of
the backscattering current Ib at 16 mK. The black broken line is Sb =2(1.7)eIb .

dot containing a single electron, enhancement of current
noise due to emergence of the Kondo effect in the quantum
dot at low temperatures, is observed.
The averaged current and current noise in the Kondo dot
can be described by the local Fermi liquid which is an extension of the Landau’s Fermi liquid to impurities or quantum
dots and the ground state of the Kondo effect. Tuning the
dot level and the lead-dot mixings to hold the particle-holesymmetry, the bias-voltage linear response current shows
perfect transmitting current due to the formation of quasiparticle’s resonant level at the Fermi level, and this current does
not fluctuate since no scattering occurs. Then, the leading
nonlinear current is third order in bias voltages due to verysmall backscattering current (Ib). Thus, the current fluctuation from this nonlinear current (Sb) is found to follow thestatistics of the Poissonian process. Theoretically, the noise
emerges from three type of scattering processes describedby the local Fermi liquid. First is the free quasiparticle’s
backscattering by the linewidth of the resonant level, witheffective charge e. Second and third are backscattering of
single quasiparticle and quasiparticle’s pair by the residualinteraction with effective charge e and ‘2e,’ respectively.
In particular, the quasiparticle’s pair scattering enhances
the shot noise and effective charge of the non-equilibrium
current through the Kondo quantum dot. The difference fromfractional Hall states or superconducting states is that the
Fermi liquid state has no energy gap at low energies. Thus
mixture of the three scattering states with different effective charges composes the non-equilibrium current throughthe Kondo dot. As a consequence of two different effective
charges in current, it is theoretically predicted that the noiseaverage ratio for the backscattering current takes the value
Sb
5 in the Kondo limit [2-4].
-=
2eIb
3
The figure shows the observed shot noise as a function of
the averaged backscattering current at 16 mK. For small currentsSbnoise-current ratio takes the values of = 1.70 ± 0.1,
2eIb
which is in very good agreement with the theoretical prediction. As mentioned above, this result corresponds to direct
detection of quasiparticle pair creation in excited states of thelocal Fermi liquid. Furthermore, we investigate bias-voltage
linear noises in the dot with particle-hole asymmetry andFermi liquid parameters appearing in the averaged current, toensure the accuracy of our shot noise measurement.
To conclude, our work offers a new approach to analyze
excited states of electron correlated states though shot noise
measurement in out of equilibrium systems.

34

ISSP Activity Report 2015

Electron-Beam-Patterned Lateral
Schottky Gates on Atomically Thin MoS2
Y. Katagiri, T. Nakamura, and J. Haruyama
MoS2 is now attracting researchers’ attention amongso-called “two-dimensional materials” because it has adirect bandgap of 1.5-1.8 eV in the semiconducting phase(2H, trigonal prismatic D3h). In the device application, themetallic phase (1T, octahedral Oh) part is indispensablefor ohmic junctions or capacitor electrodes. The transition
between the two phases does not have very high potential
barrier and comparatively easily driven. Transition from
2H-phase to 1T phase caused by electron-beam (EB) irradiation has been recently observed [1].
For practical device installation, a lateral Schottky barrier(SB) forming at 2H-1T interface is desirable. Hence, the EB
irradiated top-down fabrication of in-plane SB field effecttransistors (SB-FETs) would be promising for MoS2 based
optical-electrical integrated circuits. Here we report forma-

Fig. 1. (a) Optical microscope image of few-layer MoS2, mechanically exfoliated from bulk, with two EB irradiation regions and twoelectrode pairs patterned on individual regions. (b) Schematic view ofan electrode pair on one EB-irradiated region of (a).

Fig. 2. Current-voltage characteristics between electrodes 3 and 4 inFig. 1(b). The EB dose is 100 Me/nm2.

tion of such a lateral SB junction with EB irradiation. Fromthe current-voltage (I-V) characteristics, we believe the SB isformed at the designed position, which opens the way to 2D
material integrated circuits.
Figure 1 (a) shows an optical micrograph of the sample.
The MoS2 layer can be observed as a blue triangular shape.
Yellow lines are Ti/Au electrodes fabricated by EB-lithography. The rectangular regions indicated by the white-brokenlines are for EB irradiation, the doses of which are also
indicated. The detailed electrode configuration is illustrated
in Fig.1 (b). Electrodes 1 and 2 are separated from the regionof irradiation while electrode 3 is attached. Hence the SB
diode characteristics should appear in the transport between
electrodes 3 and 4. Figure 2 shows the I-V characteristics
between electrodes 3-4. Clear single SB diode characteristics appears manifesting that the SB is formed between theirradiated region and electrode 4. Note that the SB between
electrode 4 and MoS2 has comparatively low resistance dueto the large area and the high resistivity for the reverse bias
region comes from the high quality lateral SB between the
EB-irradiated 1T phase and 2H phase. The result indicatesthat we can make wirings and form SB-FETs at desired
positions with this technique.

which is protected by symmetry and the presence of abulk band gap [1]. So far, two types of topological invariants have been found to be useful for finding 3D TIs. One
is called Z2 index and the other is mirror Chern number. A
nontrivial Z2 topology of the bulks state gives rise to spinpolarized metallic surface sates, which are protected bytime-reversal symmetry. A nontrivial mirror Chern number
defines a 3D topological crystalline insulator, which is
associated with metallic surface states protected by mirror
symmetry of the crystal and robust against TRS breaking.
Insulators belonging to both of the topological phases may
be called “dual” TIs. Bulk BiSb alloy is well known as a3D Z2 TI for x ~ 0.1-0.2, and this material has actually been
predicted to be a dual TI. Although the electronic structureof the occupied surface states in BiSb has been well studied
by means of angle-resolved photoemission spectroscopy(ARPES) [2], the structure of the whole surface bands
including the unoccupied states has not been observed inpristine samples.
Measurements of the quasiparticle interference (QPI)
using the Fourier-transform scanning tunneling spectroscopy (FT-STS), as shown in Fig. 1, is useful for elucidating
the mirror Chern number of the BiSb alloy from the wholeband structure [3]. The BiSb alloy would be suitable forthe studies of both the spin texture and the change causedby surface magnetic impurities because the disorder in theelectrostatic potential due to the alloying gives rise to QPIon the pristine surface. We clarified the dispersions of theunoccupied electronic states via the analysis of the QPI on
the clean cleaved surface of BiSb as shown in Fig. 2. The
absence of band crossing between Σ1 and Σ2 was elucidated,
and the mirror Chern number is unambiguously determined
to be -1. Co atoms deposited onto a clean surface lead to theReferences[1] Y. C. Lin et al., Nature Nanotech. 9, 391 (2014).
[2] Y. Katagiri et al., Nano Lett. (2016) (doi: 10.1021/acs
nanolett.6b01186).
Authors
Y. Katagiria, T. Nakamura, A. Ishiia, C. Ohataa, M. Hasegawaa,
S. Katsumoto, and J. Haruyamaaa
Aoyama Gakuin University

Scanning Tunneling Spectroscopy Studyof Quasiparticle Interference on
Dual Topological Insulator Bi1-xSbx
F. Komori, I. Matsuda, and Y. AndoThree-dimensional (3D) topological insulators (TIs)
are characterized by a nontrivial topological invariant,Fig. 1. (a) STM image of a region (93 x 93 nm2) on a clean surface of
Bi1-xSbx obtained at a constant current mode. (Setpoint: It =200 pA at
Vb = 500 mV) The inset shows the close up image of a region (5 x 5nm2) revealing the hexagonal lattice of surface atoms. (Setpoint: 500
pA at 500 mV) (b) Average of 256 x 256 tunneling spectra measured on
the same region. The peaks at E1, E2, and E3 are the van Hove singularities related to the surface bands. (Bias modulation: 7 mVrms at 396
Hz; Setpoint: 500 pA at 500 mV) (c) Spatial mapping of dI/dV at Vb =+80 mV of the same region. (d) FT image calculated from the dI/dV in(c). All the equivalent points are averaged to increase signal-to-noise
ratio. The hexagon represents the size and the orientation of the surface
Brillouin zone. The dashed square represents the area displayed in the
FT images in Fig. 2(a)-(d).

ISSP Activity Report 201535

Y. Kim, Y. Yoshida and, Y. Hasegawa

tion of the observed monolayer O2 islands was conﬁrmedby their thermal stability. We observed a well-ordered O2
structure and found that the lattice was slightly distorted
from an isosceles triangular shape, which can be explainedby the presence of the exchange interactions between the O2
spins. No Kondo resonance was observed in the differential
tunneling conductance (dI/dV) spectra. Based on these observations, we conclude that the system is an S=1 two-dimensional antiferromagnetic quantum spin system
Figure 1 shows an STM image of O2 on Ag(111) taken
at 4.7 K. Because of the reduced local density of statesmonolayer O2 island structures are observed as a depressed
area. After the sample annealing up to 40 K, most of the O2
islands disappeared, indicating physisorbed nature of theadsorbed molecules. The upper right panel of Fig. 1 shows amolecular-resolved image of the O2 layer that exhibit a wellordered lattice structure. One of the peculiar things we foundis that the molecules form a scalene triangular lattice (i.e.,
AB < AC); the dimensions of the O2 unit cell were measured
as AB = 0.421 nm and AC = 0.435 nm based on real-space
STM images taken on three different O2 islands.
Since the O 2 lattice was incommensurate with theAg(111) substrate, the surface corrugation of the substrateaffects the O2 lattice only as random perturbations, and thus
does not seem to affect the shape of the O2 lattice. Actually,an almost identical scalene triangular lattice was reported for
low-coverage phase of O2 physisorbed on HOPG, which isalso incommensurate to the substrate. The similarity of theO2 structures on two different substrates indicates that the
distorted lattice structures are intrinsic to the O2 molecules.
There should be some reason for the lattice distortion
observed in the physisorbed O2 layers. Here we considered exchange interactions between the O2 spins. Theenergy of the exchange interactions between the O2 spins
was estimated as ~6 meV from the magnetization of solid
oxygen. This was less than the van der Waals interactions(~30 meV) but significant enough to contribute to the totalenergy of the system. Indeed, the high-coverage phaseof O2/HOPG and solid oxygen showed lattice distortions
coinciding with antiferromagnetic ordering, which indicatesthat the softness of the O2 lattice allows the magnetic interaction to be involved in the lattice formation. With themagnetic ordering, the system can be stabilized by shortening the sides of the isosceles triangle at which spins are
antiferromagnetically aligned, as schematically shown in
Fig. 2. In order to conﬁrm the scenario, we performed Monte
Carlo simulations for the 2D freestanding O2 lattice. Using

An oxygen molecule (O2) is one of the smallest molecular magnets with an S = 1 quantum spin, and thus anbuilding block for attractive low-dimensional quantum spin
systems, i.e., quantum spin liquid phases and the Haldane
phase. Recent development of scanning tunneling microscopy (STM) and spectroscopy (STS) has enabled directaccess to the properties of single atoms and molecules andeven their manipulation to fabricate artiﬁcial nanostructures,providing an ideal playground for bottom-up fabrication of
the low-dimensional spin systems.
A well-known problem for O2 adsorption on a substrateis that O2 often loses its spin through the strong interactions
with the substrate. However, it has been reported that theinteraction between the physisorbed O2 and Ag(111) surface
is substantially weak and that structures almost identical tosolid oxygen phases can be realized on the surface. Here
we report the direct visualization of O2 physisorbed on
Ag(111) by using low-temperature STM/STS. Physisorp-

Fig. 1. (left) STM image acquired on O2/Ag(111) at 4.7 K. An island
structure is observed as a a depressed area. (upper right) Molecularresolved STM image in an O2 island, (lower right) Schematic of O2
lattice (red ellipsoids) on Ag(111).

Fig. 2. (a)-(d) Fourie-transformation (FT) of dI/dV maps at E = -140(a), -40 (b), +160 (c), and +260(d) meV on a clean surface of Bi1-xSbx.
The scattering vectors corresponding to the observed FT peaks arelabeled by q1-q11. (e) Profiles of the FT images in the Γ-M and the Γ-K
directions plotted in grayscale. The arrow at around -100 meV in the
Γ-M direction indicate an artifact which disappears in the FT of (dI/dV)/(I/V ) maps. (f) Peak positions of the FT profiles. The size (area) ofeach marker is proportional to the peak intensity. Dashed line around70 meV is a possible FT peak corresponding to QPI within the pocket
along Γ-M, but not analyzed in detail. (g) Surface band structure of theclean surface of Bi1-xSbx reconstructed from our QPI data. Previous
ARPES data [3] with an energy resolution of 18 meV are also plotted.

appearance of clover-leaf-like impurity states at around 80
meV above EF. In spite of the deposition of the Co atoms on
the surface, the results of QPI show no significant changes
in the band dispersion from those for the clean surface. An
enhancement of spin-conserving scatterings was detected
through stronger QPI peaks in the FT spectrum.
References[1] for review, Y. Ando, J. Phys. Soc. Jpn. 82, 102001 (2013).
[2] F. Nakamura, et. al. , Phys. Rev. B 84, 235308 (2011).
[3] S. Yoshizawa et. al., Phys. Rev. B 91, 045423 (2015).
Authors
F. Komori, S. Yoshizawa, F. Nakamura, A. A. Taskina, T. Iimori,K. Nakatsuji, I. Matsuda, and Y. AndoaaInstitute of Scientific and Industrial Research, Osaka University

Oxygen Molecules Physisorbed
on Ag(111) Surface:
A two-dimensional Quantum Spin System

36

ISSP Activity Report 2015

Fig. 2. Lattice distortion induced by antiferromagnetic ordering. The
blue and green arrows denote the directions of the O2 spins.

a set of the parameters that were used for the high-coveragephase of the O2/HOPG, we successfully reproduced the
distortion, conﬁrming the validity of the scenario. We thus
concluded that the antiferromagnetic ordering of the O2 spins
played a crucial role in the distortion of the O2 lattice onAg(111).
In order to verify the preservation of the intrinsic S=1
spin of O2 on the Ag(111) surface, we also checked the
dI/dV spectra taken on the O2 island and observed no speciﬁc
evidence of the Kondo resonance around the Fermi level,in stark contrast with the case of O2 molecules on Ag(110),
which exhibits a clear Kondo resonance at 18 K. The O2
spins are thus little inﬂuenced by the itinerant electronsof the substrate, and would be expected to form an S = 1
quantum spin system. These results imply that our system
is an example of a 2D S = 1 antiferromagnetic quantum
spin system and the potential for a brand-new approach of
constructing low-dimensional quantum spin systems in abottom-up fashion.
References[1] S. Yamamoto, Y. Yoshida, H. Imada, Y. Kim, and Y. Hasegawa,Phys. Rev B 93, 081408(R) (2016).
Authors
S. Yamamoto, Y. Yoshida, H. Imadaa, Y. Kima, and Y. Hasegawaa
RIKEN

Novel Pressure Dependenceof the Superconductivity in
Non-Centrosymmetric LaNiC2:
Evidence of Strong Electronic Correlations

Fig. 1. Electrical resistivity under high pressures up to about 3 GPa.
The inset shows that pressure enhances the superconducting transition
temperature Tc substantially.

a conventional BCS-type superconductor [3]. Therefore its
superconducting mechanism is still unclear. Furthermore,this system is not magnetic, and thus it has been consideredthat its electronic correlations would be weak in contrast
with other heavy fermion systems. To get further informationon this superconductivity, pressure effects on the superconducting state of LaNiC2 have been studied.
Figure 1 shows the temperature dependence of theelectrical resistivity of LaNiC2 under high pressures up to
3 GPa. Under these pressures, Tc is enhanced greatly at therate of 0.25 K/GPa. For normal conventional metals pressure
contracts their lattices, and generally the electron density
D(EF) at the Fermi energy EF decreases. In the BCS theory,
therefore, Tc would decrease with increasing pressure. The
results obtained here thus suggest that the superconductivityof this system is possibly changed under high pressure bysome novel mechanism.
Above the pressure of 3 GPa, the superconductivity
enhanced once is heavily suppressed. As shown in Fig. 2,
the pressure of 8 GPa extinguishes its superconductivity
completely. At the higher temperatures, on the other hand,
the resistivities above 5 GPa show clear anomalies over
100 K, as displayed in the inset of Fig. 2. The temperatureobserved as an anomalous hump increases with pressure up
to room temperature at the rate of 51.5 K/GPa. These results
show that a new state (NS) is evidently induced under highS. Katano and Y. Uwatoko
Since the discovery of the heavy-fermion superconductor
CePt 3Si [1], superconductivity of non-centrosymmetricsystems has attracted great interest. The non-centrosymmetrycauses the antisymmetric spin-orbit coupling (ASOC) that
leads to the indistinguishability of spin-singlet and spintriplet electron pairings. LaNiC2 forms a non-centrosymmetric structure (space group: orthorhombic Amm2), andexhibits superconductivity below the transition temperature
Tc of about 3 K. On this superconductivity a recent muon
spin relaxation (μSR) experiment indicated the breaking of
the time-reversal symmetry (TRS) in the superconducting
state, which leads to non-unitary p-wave spin-triplet pairings[2]. However, a NQR study suggested an enhancement of thenuclear spin relaxation rate (1/T1) just below Tc, implying

Fig. 2. Electrical resistivity under high pressures up to 8 GPa. The inset
indicates that the resistivity at high temperatures shows an anomaly
with a clear hump, implying an emergence of a new state.

ISSP Activity Report 201537

Fig. 3. P-T phase diagram of LaNiC2. The mark M and S denote metaland superconductivity, respectively; and NS indicates ‘a new state’
induced under pressure. In the inset, the superconducting transition
temperatures are multiplied by the factor of 10.

pressures. With such an emergence of the NS state, thesuperconductivity is intensely suppressed. Figure 3 shows
the phase diagram obtained. It is noted that this diagramshows a dome for Tc but is mirror symmetric to those ofmany other systems like heavy-fermion and high-Tc superconductors.
For this NS state it remains that some RNiC2 (R = rareearth) systems show charge density wave (CDW) states athigh temperatures. Thus, it might be natural that the anomalous hump observed at the temperatures over 100 K originates from the phase transition to the CDW state. This newly
induced state is enhanced strongly under high pressures;
further, that is quite robust up to the highest pressure of 30
GPa investigated in this work.
With the disappearance of the superconductivity a newstate (NS) with a high energy scale is dramatically emerged.
These results indicate that the system is not a simple normal
metal but is highly correlated with strong electronic interactions such as CDW, which correlations may contribute to thesuperconductivity of this unique system [4].
References[1] E. Bauer et al., Phys. Rev. Lett. 92, 027003 (2004).
[2] A.D. Hillier, J. Quintanilla, and R. Cywinski, Phys. Rev. Lett. 102,
117007 (2009).
[3] Iwamoto et al., Phys. Lett. A 250, 439 (1998).
[4] S.Katano et al., Phys. Rev. B 90, 220508(R) (2014).
Authors
S. Katanoa, H. Nakagawaa, K. Matsubayashi, Y. Uwatoko, H. Soedab,T. Tomitab, and H. Takahashib
aSaitama University
bNihon University

Correlation Effects in Topological Insulators
N. Kawakami
We report our recent studies on correlated topologicalinsulators using ISSP supercomputer. We first investigate
a topological Mott insulator in one dimension (1D) to
discuss how the edge Mott states emerge due to the interplay of topology and correlation [1]. We then address how
the topological state is restored by the temperature in thepresence of strong correlations in two dimensions (2D)38

ISSP Activity Report 2015

Fig. 1. Left panel: winding number N1, Right panel: spectral gaps foredge states:Δc, (Δs) for the one-particle (spin excitation) spectrum[1], as a function of Hubbard interaction U (t denotes nearest neighbor
hopping). It is seen that the topological phase transition occurs, but Δcdoes not vanish in contrast to a noninteracting topological transition.
Instead, we see the gap closing for collective spin excitations Δs.

[2]. We demonstrate that such restoration of topologicalproperties is rather generic, by exploring another correlated
topological insulator [3]. We also mention some issues
related to topological insulators [4-6].
(A) We first summarize the results obtained for a 1D
topological Mott insulator [1]. By examining the bulk
topological invariant and the entanglement spectrum ofa correlated Su-Schrieffer-Heeger model, we clarify how
gapless edge states in a non-interacting topological band
insulator evolve into spinon edge states in a topologicalMott insulator. Furthermore, we propose a new type of
topological Mott transition. In Fig.1, we show a topologicalMott transition driven by the Hubbard interaction U [1]. As
seen from left panel, a transition from a trivial phase (N1=0)
to a nontrivial one (N1=1) occurs, and at this transition a
one-particle gap (Δc) is not closed but only a spin excitationgap (Δs) becomes gapless (right panel). This unconventionaltransition occurs in a spin liquid phase and is accompanied
by zeros of the single-particle Green's function and a gap
closing in the spin excitation spectrum [1].
(B) We elucidate how a topologically nontrivial phaseevolves at finite temperatures [2,3]. Specifically, we study aKane-Mele Kondo lattice model at finite temperatures withdynamical mean field theory. The obtained phase diagramshows three phases at zero temperature [2]: an antiferromagnetic topological insulator, an antiferromagnetic trivial
insulator, and a trivial Kondo insulator. We find a restorationof topological properties at finite temperatures due to theinterplay of a topologically nontrivial structure and electron
correlation. In order to address this phenomenon, we analyze
the bulk and edge properties. In the bulk, the spin-Hall
conductivity which is almost zero around zero temperature increases with increasing temperature. At the edge, thegapless edge modes emerge with increasing temperature.
(C) We finally summarize some issues related totopological phase transitions, which will be realized in new
platforms such as cold atomic systems, photonic systems,
etc. We clarify non-equilibrium topological phase transitions in 2D optical lattices [4]. We unveil hidden topologicalphases in a 1D quantum walk [5]. We clarify topologicalproperties of cold bosons in 1D quasiperiodic optical lattices[6].
References[1] T. Yoshida, R. Peters, S. Fujimoto, and N. Kawakami, Phys. Rev.
Lett. 112, 196404 (2014).
[2] T. Yoshida, R. Peters, and N. Kawakami, Phys. Rev. B 93, 045138(2016) .

[3] T. Yoshida and N. Kawakami, arXiv:1604.00122.
[4] M. Nakagawa and N. Kawakami, Phys. Rev. A 89, 013627 (2014);
Phys. Rev. Lett. 115, 165303 (2015).
[5] H. Obuse, J. K. Asboth, Y. Nishimura, and N. Kawakami, Phys.
Rev. B 92, 045424 (2015).
[6] F. Matsuda, M. Tezuka, and N. Kawakami, J. Phys. Soc. Jpn. 83,
083707 (2014) .
Authors
N. Kawakamia, T. Yoshidaa, R. Petersa, N. Nakagawaa, F. Matsudaa,
M.Tezukaa, Y. Nishimuraa, S. Fujimotob, H.Obusec, and J. K. AsbothdaKyoto University of Tokushimab
Osaka Universityc
Hokkaido UniversitydWigner Research Center, Hungary

Investigation of Average and Local Structures,and Electron-Density Distributionof Lithium Transition-Metal Oxide
Y. Idemoto and N. Kitamura
In recent years, the lithium-ion battery has been expected
to be applied for not only portable electronic devices such asa mobile phone but also a vehicle and a storage device andso on. From such background, many researches have devoted
their efforts to develop new lithium transition-metal oxides
with superior cathode performances. For the development,
crystal and electronic structures of the cathode materials
must be determined precisely since the structures are wellknown to affect the cathode properties. Moreover, it isconsidered recently that local orderings of transition metals
in the crystal play an important role for charge and discharge
processes. Therefore, it is highly expected to discover local
structures hidden in crystal structures. In our recent works,
we paid special attention on LiNi0.8Co0.2O2-based materials[1] and Li(Li1/6Mn1/2Ni1/6Co1/6)O2 [2] with the layered
structure, and investigated the average and local atomistic
structures, and electron-density distribution by using neutronand synchrotron X-ray sources.
As for LiNi0.8Co0.2O2-based materials, we refined theaverage structure by the Rietveld analysis using neutron
diffraction patterns. The data were measured under ambientcondition with HERMES installed at JRR-3. Fig. 1 shows

the Rietveld refinement pattern of LiNi0.79Zn0.01Co0.2O2.
In the analysis, we assumed the space group as R-3m, andoptimized an exchange amount of Li and Ni, which is theso-called “cation mixing”. As a result, the average structure could be successfully refined, and the Ni content at
Li site was estimated as 0.056 (3). We could also refined
average structures of other LiNi0.8Co0.2O2-based materials
with partial Cu substitution and without any substitution(the pristine sample) in the same manner. For the purposeof electronic-structure analysis on the samples, we carriedout the maximum-entropy method (MEM) using synchrotron X-ray diffraction patterns. When X-ray diffraction data
are used, it is quite difficult to obtain accurate information
on light element such as Li and O generally. Therefore, theaverage structures refined with the neutron diffractions were
utilized as the initial structures in the analytical processes.
By this strategy, electron-density distributions could be
estimated successfully, and then it was found that both theZn and Cu substitution for LiNi0.8Co0.2O2 tended to reduce abond strength between the transition-metal and oxygen sites.
In order to investigate the local structure ofLi(Li1/6Mn1/2Ni1/6Co1/6)O2 with the layered structure, wefirstly performed the average structure refinement (S. G.:C2/m) using neutron Bragg profile recorded at HERMES,
and then analyzed the reduced pair distribution function,
G(r), which was derived from neutron total scatterings. Prior
to the PDF fitting, we constructed the some local-structure
models with different metal arrangement which satisfied thesite occupancies refined by the Rietveld method, and thenrelaxed atomic configurations of the models by the density
functional theory (DFT) calculation. On the basis of theresults, we carried out the PDF fitting only for an energetically-stable model. The PDF analysis indicated that a LiMn6ordering was formed within the transition-metal layer in thesame way as Li2MnO3. In addition, the detailed investigationsuggested a local distortion along the c axis which is perpendicular to the layer.
The our works described above demonstrate that thestructure analysis using both the neutron and synchrotron X-ray diffractions gives us fruitful information theelectronic structure as well as the crystal structure of thecathode materials for the lithium-ion battery. Moreover, acombination of the Rietveld and PDF analyses enable us togain deeper understanding the atomic configurations of thefunctional oxides.
References[1] Y. Idemoto, Y. Tsukada, and N. Kitamura, Solid State Ionics, 279, 6(2015).
[2] Y. Idemoto, K. Akatsuka, and N. Kitamura, J. Power Sources, 299,
280 (2015).
Authors
Y. Idemotoa and N. KitamuraaaTokyo University of Science

Extremely Large and Anisotropic Upper
Critical Field inIon-Gated MoS2
Y. Saito, Y. Kohama, and Y. Iwasa
Fig. 1. Rietveld refinement pattern of LiNi0.79Zn0.01Co0.2O2. Red
pluses and a blue solid line represent observed and calculated intensities, respectively. Vertical marks indicate positions of allowed Braggreflections (upper marks for LiNi0.79Zn0.01Co0.2O2, and lower marksfor Li2CO3). A curve at the bottom is a difference between the observedand calculated intensities in the same scale.

Superconductivity is a quantum phenomenon characterized by zero electrical resistance and complete expulsion of
the magnetic flux. The extraordinary properties arise fromthe condensation of the Cooper pair that consists of a pair

ISSP Activity Report 201539

for the in-plane and out-of-plane configurations. On the other
hand, the exceptionally large Hc2 for the in-plane configuration is due to an enhancement of the Pauli limit, caused by
the strong spin-orbit interaction and the non-centrosymmetricnature of MoS2 single layer. Indeed, our numerical calculation based on realistic tight-binding calculations demonstratethat the Cooper pairs are protected by the strong spin-orbit
interaction, and are thereby very robust against external
magnetic fields for the in-plane configuration. The robustness of Hc2 against external magnetic fields might make
MoS2-EDLT an ideal platform for investigating noncentrosymmetric superconductors.

Fig. 1. MoS2 EDLT transistor on the rotator probe.

of free electrons with opposite spins. The application ofstrong magnetic fields tends to arrange spins in one direction,
therefore the ordinal superconductivity cannot be survived
above the certain limit of magnetic fields, called the Paulilimit “HPauli ~ 1.86 Tc”. Nevertheless, our recent collaboration work performed at International MegaGauss Science
Laboratory (IMGSL) has experimentally revealed that an
ion-gated molybdenum disulphide (MoS2) transistor exhibits
an extremely large upper critical field (Hc2) that is 4-5 times
more than the Pauli limit of ~ 12 T [1].
The Hc2 were directly estimated from the magnetoresistance measurement on superconducting MoS2 samples thatwere prepared by using an electric-double-layer transistor(EDLT) configuration [2]. Since the Hc2 is extremely large
and shows a high degree of anisotropy, we developed a
specially designed plastic rotator (see Fig.1) and performed
magnetoresistance measurements in pulsed magnetic fields
up to 55 T. The rotator probe was made of a plastic material,
and thus the eddy current related problems, such as Joule
heating and mechanical vibration, were completely eliminated even in a pulsed field environment.
The obtained Hc2 vs T plot is shown in Fig.2, which
provides the experimental evidence of anisotropic andextremely large upper critical fields on the MoS2-EDLT.
We interpret that the large anisotropy can be understood asa consequence of the two-dimensional electric property of
MoS2-EDLT, namely the completely different orbital motion

Fig. 2. Upper critical fields (Hc2) vs Temperature (T). The orange andgreen dots are the Hc2 when the external magnetic fields are applied toparallel (Hc2||) and perpendicular (Hc2⊥) to the plane, respectively. The
upper critical fields were deduced from the magnetoresistance measurements.

40

ISSP Activity Report 2015

References[1] Y. Saito, Y. Nakamura, M. S. Bahramy, Y. Kohama, J. T. Ye,
Y. Kasahara, Y. Nakagawa, M. Onga, M. Touanga, T. Nojima,
Y. Yanase, and Y. Iwasa, Nature Physics 12, 144 (2016).
[2] J. T. Ye, Y. J. Zhang, R. Akashi, M. S. Bahramy, R. Arita, andY. Iwasa, Science 338, 1193 (2012).
Authors
Y. Kohama, Y. Saito, Y. Iwasa, M. Tokunaga, and K. Kindo

Quantum Transport of Dirac Fermions
Coupled with Magnetic Order in EuMnBi2
H. Sakai, M. Tokunaga, and S. Ishiwata
Dirac materials, characterised by linear energymomentum dispersion near Fermi level, have attracted muchattention for their unique transport properties such as halfinteger quantum Hall effect, observable even at room temperature in graphene. To expand potential application of their
distinct quantum transport, it is highly desirable to control
the conduction of Dirac fermions by magnetic moments
in solids as well as external fields. Despite recent discoveries of a number of new bulk Dirac materials, quantum
transport features have been elucidated mostly in nonmagnetic materials, as exemplified by so-called Dirac/Weylsemimetals, such as Cd3As2, Na3Bi, and TaAs.
We here report novel magneto-transport features for a

Fig. 1. Schematic illustration of the crystal and magnetic structure for
EuMnBi2 at zero field, together with the formal valence of each ion.
The magnetic moments of the Mn sublattice are not shown for brevity.

be as high as µ ~ 14,000 cm2/Vs at 2 K. This indicates thatthe interlayer conduction is suppressed by the staggered Eu
moments along the c axis, whereas the ferromagnetic order
within the plane may promote the in-plane transport. Thus,
the crystal structure of EuMnBi2 can be regarded as a naturalspin-valve structure embedded in a multilayer Dirac fermion
system. Our discovery would open the door for engineering
the Dirac fermion transport in magnetic materials suitable fornovel spintronic devices with an extremely high speed.
References[1] J. Park, G. Lee, F. Wolff-Fabris, Y. Y. Koh, M. J. Eom, Y. K. Kim,
M. A. Farhan, Y. J. Jo, C. Kim, J. H. Shim, and J. S. Kim, Phys. Rev.
Lett. 107, 126402 (2011).
[2] J. K. Wang, L. L. Zhao, Q. Yin, G. Kotliar, M. S. Kim, M. C.
Aronson, and E. Morosan, Phys. Rev. B 84, 064428 (2011).
[3] K. Wang, D. Graf, H. Lei, S. W. Tozer, and C. Petrovic, Phys. Rev.
B 84, 220401(R) (2011).
[4] A. F. May, M. A. McGuire, and B. C. Sales., Phys. Rev. B 90,
075109 (2014).
[5] S. Borisenko, D. Evtushinsky, Q. Gibson, A. Yaresko, T. Kim,
M. N. Ali, B. Buechner, M. Hoesch, and R. J. Cava, arXiv:
15070.04847 (2015).
[6] H. Masuda, H. Sakai, M. Tokunaga, Y. Yamasaki, A. Miyake,
J. Shiogai, S. Nakamura, S. Awaji, A. Tsukazaki, H. Nakao,
Y. Murakami, T.-h. Arima, Y. Tokura, and S. Ishiwata, Sci. Adv. 2,e1501117 (2016).

Fig. 2. Field profile of (A) interlayer resistivity ρzz, (B) in-plane resistivity ρxx, and (C) Hall resistivity ρyx for EuMnBi2 at 1.4 K for the fieldparallel to the c axis. Schematic illustration of variation of the ordered
Eu moments adjacent to the Bi layer is presented above the panels.

new multilayer Dirac fermion system EuMnBi2. Recently,
layered magnets AMnBi2 (A=Sr2+ [1-3] and Eu2+ [4,5]) were
found to host anisotropic 2D Dirac fermion, providing an
ideal arena to reveal the interplay between Dirac fermionsand ordered magnetic moments. The crystal structure
consists of the conducting layers of Bi square net hosting
quasi two-dimensional (2D) Dirac fermions and theinsulating magnetic layers consisting of the Mn-Bi and A
layers (Fig. 1). To explore quantum transport phenomena
associated with magnetically-controllable Dirac fermions,
we have investigated the detailed magnetic and transport
properties by applying field up to 55 T at the International
MegaGauss Science Laboratory at the Institute for Solid
State Physics [6].
The magnetization dominated by the Eu sublattice shows
typical behaviour of uniaxial antiferromagnet. We observeda spin-flop transition for the field of ~ 5.5 T (Hf) along the caxis, followed by saturation at ~ 22 T (Hc) with a saturation
moment of ~ 6.5 μB/f.u (not shown here), which reflects thefull moment of localised Eu 4f electrons. The in-plane resistivity (ρxx) and interlayer resistivity (ρzz) exhibit clear anomalies at the magnetic phase transition of Eu sublattice (Fig.
2). In particular, ρzz exhibits a large jump at Hf, followed by
giant Shubnikov–de Haas (SdH) oscillations that reach ∆ρzz/
ρzz ~ 50% in the spin-flop antiferromagnetic (AFM) phase(Fig. 2A). This high ρzz state is terminated at Hc, above
which the ρzz value is substantially reduced. Interestingly, themagnitude of the SdH oscillations in ρxx and ρyx (Hall resistivity) is also enhanced in the spin-flop AFM phase (Fig. 2B
and 2C), which evolves to plateau-like structures in the ρyx
profile as indicated horizontal thick arrows in Fig. 2C. Thissignifies the first observation of the multilayer quantum Hall
effect of quasi 2D Dirac fermions in a bulk magnet [6].
In spite of the strong coupling between the magnetismand transport properties, the carrier mobility is estimated to

Authors
H. Masudaa, H. Sakaib,a, M. Tokunaga, A. Miyake, and S. Ishiwataa,ca
The University of Tokyob
Osaka UniversitycPrestoA New Numerical Method for
Finite-Temperature Calculations ofStrongly Correlated Electrons Systems
T. Misawa
In strongly correlated electrons systems, many exotic
phenomena such as high-Tc superconductivities have beenfound. To clarify how the strongly electronic correlations
induce such exotic phenomena, highly-accurate numericalmethods for the low-energy effective models of strongly
correlated electron systems such as Hubbard model playessential role. For the ground-state calculations (zerotemperature calculations), powerful numerical algorithms
such as density matrix renormalization group method or
tensor network algorithms already exist and they have been
applied to broad range of the strongly correlated electronssystems. However, for the finite-temperature calculations,the efficient numerical method is absent and developmentof highly-accurate finite-temperature calculations remains achallenging problem.
In the textbook implementation of the finite-temperature
calculation, it is necessary to take ensemble average overthe excited states and it is practically formidable to carryout. Contrary to the standard implementation, recent development of the statistical physics shows that the calculation within small number of pure states instead of the full
ensemble average is sufficient for accurate estimate of finitetemperature properties. Such pure states are called thermal
pure quantum (TPQ) states and they are easily generated
by performing the imaginary-time evolution of the wave
function.
Based on the principle of the TPQ, we develop a new
method to perform the calculations for the larger system

ISSP Activity Report 201541

Fig. 1. (a) Temperature dependence of internal energy per site calculated from FT-VMC for 4×4 half-filled Hubbard model with U/t=4. The
FT-VMC result is shown by red circles in comparison with essentiallyexact results obtained by full-space TPQ (FS-TPQ) method shown by
blue curve. (b) Temperature dependence of nearest neighbor spin correlations calculated by FT-VMC (red circle) and FS-TPQ (blue curve)
method. The shadow region in (a) and (b) represent the error bars in
FS-TPQ method.

size where the exact imaginary-time evolution is impossible.
A key fact is that accurate imaginary-time evolution of the
wave functions is possible by using the stochastic reconfiguration method, which is used as the optimization method in
the variational Monte Carlo (VMC) method. Thus, we callthis numerical method finite-temperature VMC (FT-VMC)
method. By comparing the exact results, as shown in Fig. 1,
we have shown that temperature dependence of the physicalproperties such as internal energy and spin correlations iswell reproduced by using the FT-VMC method. Moreover,
we have shown that our method can be applicable to larger
system size where the exact imaginary-time evolution is
impossible. Our method opens a new way for the accurate
calculations of the strongly correlated electron systems.
Reference[1] K. Takai, K. Ido, T. Misawa, Y. Yamaji, and M. Imada, J. Phys. Soc.
Jpn. 85, 034601 (2016).
Authors
K. Takaia, K. Idoa, T. Misawa, Y. Yamajia, and M. ImadaaaUniversity of Tokyo

photoelectron spectroscopy (TRPES) to the C60/TiO2 (110)heterojunction in order to elucidate how the excited carriers
behave at the junction. An experiment of TRPES utilizing
the pump-probe method has been proven to be a powerfultool to simultaneously determine the electronic structure andthe dynamics of the photoexcited carriers at semiconductor
surfaces.
The TRPES measurements were carried out at SPring-8
BL07LSU [1]. For the pump light, a second harmonic ofan amplified Ti:sapphire laser pulse was used. The pulse
duration and a repetition rate were 35 fs and 1 kHz, respectively. The photon energy was set at 3.06 eV, which exceeds
both the band gap of rutile TiO2 (3.0 eV) and the energy
difference between the highest occupied molecular orbital(HOMO) level and the lowest unoccupied molecular orbital(LUMO) level of C60 (2.3 eV). For the probe light, synchrotron radiation (SR) lights with the energies of 253 eV and
600 eV were used to measure valence-band spectra and Ti 2p
and C 1s core-level spectra, respectively. The SR lights were
provided by a single bunch and a 11/29-filling bunch trainof an H-mode operation. SR pulses from the single bunches
were used for the pump/probe measurements. A width of thepulse was 50 ps and a time interval between the pulses was
4.79μs.
We examined the effect of UV laser irradiation on theelectronic structure of the C60/TiO2(110) heterojunction[2].
An upper panel in Fig. 1 shows a Ti 2p3/2 spectrum measured
without UV irradiation. A background subtracted peak isreproduced by a single Voigt function with a peak maximum
at 458.2 eV. A Ti 2p3/2 spectrum in the lower panel isacquired at 1ns after laser pulse irradiation. The peak is also
fitted by a Voigt function with a peak maximum at 458.3 eV.
Regarding the C 1s core-level peak of C60, a laser induced
shift is 0.25 eV towards the higher binding energy (BE) side.
The C 1s peak in the dark condition (without laser irradiation) is located at 284.4 eV. A small structure at 286.1 eVis due to C–O. The peak moves to 284.65 eV at 1 ns after
irradiation. The BE shifts of both Ti 2p3/2 and C 1s peaks aretransient because the peaks go back to the original positions

Capturing Transiently Charged Statesat the C60/TiO2(110) Interface
by Time-Resolved Soft X-ray
Photoelectron Spectroscopy
K. Ozawa, S. Yamamoto, and I. Matsuda
One of key technologies for realizing sustainable society
is an efficient conversion of the sunlight into chemicaland electrical energies. Titanium dioxide (TiO2) exhibits ahigh photocatalytic activity for water splitting to produce
a zero-emission fuel. TiO2 is also used as a transparent
electrode in photovoltaic cells [2]. One of the extensively
studied TiO2-based photovoltaic cells is a dye-sensitizedorganic cell, in which visible-light sensitive dye molecules
or polymers are loaded onto the TiO2 electrodes. The TiO2electrode collects photoexcited electrons from the lightabsorbing layer to facilitate electron-hole separation. In sucha photovoltaic cell, a charge transfer across the interface isan important elemental step to define the performance ofthe cell. A molecule of C60 is an important component ofdye-sensitized photovoltaic cells, where the C60 layer is used
as an electron acceptor and as an electron transport layer.
C60 also serves to enhance photocatalytic activity of TiO2 bypromoting the separation of the photoexcited electron-holepairs. In the present study, we apply time-resolved soft X-ray

42

ISSP Activity Report 2015

Fig. 1. (a) Ti 2p3/2 and (b) C 1s core-level spectra for C60/TiO2(110)with the C60 thickness of 0.57 nm. Spectra in the upper panels wereacquired without the pump laser, whereas those in the lower panels
were measured at 1 ns after irradiation of the laser pulse. The photon
energy of the pump laser was 3.06 eV, and a power density was 40μJ/
cm2/pulse. The photon energy of the probe SR light was 600 eV, andthe emitted photoelectrons were collected with repetition rates of 208
kHz for the upper spectra and 1 kHz for the lower spectra. In eachpanel, a raw spectrum and a background-subtracted spectrum are drawn
by dots. Background curves, shown by solid lines, were a combinationof a Shirley-type curve and a linear line. Solid lines with shaded areas
are the result of least-square fitting using Voigt functions.

by the time the next probe pulse arrives after 4.79 μs. Theenergy shift does not due to the surface photovoltage (SPV)
effect since direction of the energy shift is opposite to the
expectation. Moreover, the power density of the irradiatedpump laser in the present study was 40μJ/cm2/pulse, which
was insufficient to induce the SPV effect on the TiO2(110)
surface [1].
Figure 1 clearly demonstrates that deposited C60 on
TiO2(110) must be responsible for the UV-induced shift of
the Ti 2p3/2 core level in the weak excitation condition. Asidefrom the TiO2 substrate, the C60 overlayer also absorbs the
3.06-eV pump laser. In the present excitation condition, the
HOMO → LUMO+1 and HOMO-1 → LUMO transitions
are possible so that the valence electrons should promote
to the LUMO and LUMO+1 levels, and the holes are left
in the HOMO and HOMO-1 levels. Since both the LUMO
and LUMO+1 states energetically overlap to the conduction
band of TiO2, a resonant transfer of the excited electrons is
possible from C60 to TiO2. Such an interface charge transfer
competes with the electron-hole recombination process.
It is speculated that a large fraction of the photoexcitedelectrons in the C60 layer is possible to be transferred to
TiO2. The transferred electrons, then, undergo deexcitation
to the bottom of the conduction band of TiO2. As a result,C60 is cationized after laser irradiation. The C 1s peak shift
towards the higher BE side must, therefore, be caused by thischarging effect. Regarding the TiO2 side of the heterojunction, additional electrons are injected from the C60 layer sothat the carrier density is increased at the TiO2 surface. The
BE shift of the Ti 2p3/2 peak should, therefore, reflect theenlarged magnitude of downward band bending.
References[1] M. Ogawa et al., Rev. Sci. Instrum. 83, 023109 (2012).
[2] K. Ozawa et al., Organic Electronics 31, 98 (2016).
Authorsb
K. Ozawaba, S. Yamamoto, R. Yukawa, K. Akikubo, M. Emori ,H. Sakama ,and I. MatsudaaTokyo Institute of TechnologybSophia University

ISSP Activity Report 2015

43

Progress of Facilities
Supercomputer Center
The Supercomputer Center (SCC) is a part of theMaterials Design and Characterization Laboratory (MDCL)of ISSP. Its mission is to serve the whole community ofcomputational condensed-matter physics of Japan providing
it with high performance computing environment. In particular, the SCC selectively promotes and supports large-scalecomputations. For this purpose, the SCC invites proposals forsupercomputer-aided research projects and hosts the Steering
Committee, as mentioned below, that evaluates the proposals.
The ISSP supercomputer system consists of two subsystems: System B, which is intended for more nodes withrelatively loose connections. In July, 2015, the SCC replaced
the two supercomputer subsystems (SGI Altix ICE 8400EX
and NEC SX-9) to one new system (System B, SGI ICE XA/UV hybrid system). The system B consists of 1584 CPU
nodes, 288 ACC nodes, and 19 FAT nodes. The CPU node
has 2CPUs (Intel Xeon). The ACC node has 2CPUs (IntelXeon) and 2GPUs (NVIDIA Tesla K40). The FAT node has
4CPUs (Intel Xeon) and large memory (1TB). The system B
have totally 2.6 PFlops theoretical peak performance.
System C - FUJITSU PRIMEHPC FX10 was installedin April, 2013. It is highly compatible with K computer, thelargest supercomputer in Japan. System C consists of 384
nodes, and each node has 1 SPARC64TM IXfx CPU (16cores) and 32 GB of memory. The system C have totally 90.8
TFlops.
The hardware administration is not the only function of
the SCC. The ISSP started hosting Computational Materials
Science Initiative (CMSI), a new activity of promoting
materials science study with next-generation parallel supercomputing. This activity is financially supported by the
MEXT HPCI strategic program, and in CMSI, a number ofmajor Japanese research institutes in various branches of

Class

A

Max Points

Application

System B

System C

100

100

any timematerials science are involved. The SCC supports the activities of CMSI as its major mission.
All staff members of university faculties or publicresearch institutes in Japan are invited to propose research
projects (called User Program). The proposals are evaluatedby the Steering Committee of SCC. Pre-reviewing is done by
the Supercomputer Project Advisory Committee. In school
year 2015 totally 239 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):
First-Principles Calculation of Materials Properties (123)
Strongly Correlated Quantum Systems (31)
Cooperative Phenomena in Complex, Macroscopic
Systems (85)
All the three involve both methodology of computationand its applications. The results of the projects are reported
in 'Activity Report 2015' 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 2015, thefollowing three invited papers are included:"Correlation Effects in Topological Insulators", Norio
KAWAKAMI"Capacitance of Nanosized Capacitors Investigated Using
the Orbital-Separation Approach–Dead Layer Effectand Negative Capacitance", Shusuke KASAMATSU,
Satoshi WATANABE, Seungwu HAN, and Cheol Seong
HWANG"Multiscale Simulation Performed on ISSP Super
Computer: Analysis of Entangled Polymer Melt Flow”,
Takahiro MURASHIMA

Numberof
Projects
13

Total Points
AppliedApproved

System B

System C

System B

System C

1.3k

1.3k

1.3k

1.3k

B

1k

500

twice a year

57

43.8k

8.6k

26.0k

7.8k

C

10k

2.5k

twice a year

162

1394.8k

181.3k

475.0k147.8k

D

10k

2.5k

any time

2

18.0k

4.0k

14.0k

2.5k

E

30k

2.5k

twice a year5

150.0k

7.5k

79.0k

6.2k

twice a year

0

0

0

0

0

CMSI

33

125.0k

139.0k

125.0k

139.0kTotal

272

1732.9k

341.7k

720.3k

304.6kS

Table 1. Research projects approved in 2015
The maximum points allotted to the project of each class are the sum of the points for the two systems;
Computation of one node for 24 hours corresponds to one points for the CPU nodes of System B and System C.
The FAT and ACC nodes require two points for a 1-node 24-hours use.

44

ISSP Activity Report 2015

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. 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 Programsupported 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.
Scientific outputs from HRC in FY2015 covers wide
range in magnetism and strongly correlated electrons. Oneof the highlights is the identification of magnetic model inmultiferroic NdFe3(BO3)4. Combination of position sensitive detectors in wide scattering angle and the rotation ofsample goniometer in HRC enables the effective measurement of neutron structure factor S(q, ħω) as shown in Fig. 1.
The well-defined excitations in high-energy resolution are
observed. The characteristic features including anti-crossingof modes and anisotropy gap are consistently explained byspin-wave calculation on the basis of coupled Fe-Nd subsystems. Detailed analysis on the spectra revealed that the multiferroic structures in the compound is determined by the local
anisotropy of Nd ion.
Technical progress of HRC spectrometer was the development of the magnetic field environment. We examined aperformance test of a superconducting magnet on the HRC
goniometer. The magnetic field of 10 T was achieved withnormal operation of the related components in the straying
field. The magnitude of the field is the highest record in
J-PARC/MLF at present. By using radial collimator forthe reduction of background scattering from Aluminum
supporting ring in the magnet, high-quality data wascollected.
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.
http://neutrons.ornl.gov/instruments/HFIR/CG4C/
The activity report on Neutron Scattering Research in
JFY2012-2014 is given in NSL-ISSP Activity Report vol. 20(2015).

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

Fig. 1. Neutron structure factor of NdFe3(BO3)4 sliced by the plane ofħω - c* in panel (a) and that of ħω - a* in panel (b). For more details,
see Research Highlights of Masuda group at page 20.

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

ISSP Activity Report 201545

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.

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

Building C
Room
101-113

Building C
Room
114-120

Building C
Room 121

Building K

goals is to provide the scientific users as our joint researchwith magnets capable of a 100 T, milli-second long pulses ina non-destructive mode, and to offer versatile physical precision measurements. The available measuring techniques now
involve magneto-optical measurements, cyclotron resonance,
spin resonance, magnetization, and transport measurements.
Recently, specific heat and calorimetric measurements arealso possible to carry out with sufficiently high accuracy.
Our standard non-destructive-type pulse magnets areenergized by single capacitor bank and can generate fields up
to 75 T for ordinary use. Their simple sinusoidal waveforms
are advantageous for precise and reliable measurements ofvarious physical properties. Several on-demand magnets
having irregular shapes and sizes are developed for someparticular experiments. We open six magnet cells for parallel
experiments and accept more than 50 research projects per
year in 2013.
A 210 MJ flywheel generator (Fig. 2), which is the world
largest DC power supply (recorded in the Guinness Book ofWorld Records) has been installed in the DC flywheel generator station at our laboratory, and used as an energy source oflong pulse magnets. The magnet technologies are intensively
devoted to the quasi-steady long pulse magnet (an order of
1-10 sec) energized by the giant DC power supply. The latest
long-pulse magnet can generate fields up to 36 T with its
pulse half-period of 1 sec.
Our interests cover the study on quantum phase transitions (QPTs) induced by high magnetic fields. Fieldinduced QPTs have been explored in various materials
such as quantum spin systems, strongly correlated electron

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

ISSP Activity Report 2015

Down to 0.3 K

Magnetization
Magneto-Transport

2K –Room temperature

210 MJ, 2.7 kVResistance
Magneto-Calorimetry

2K –Room temperature

Table 1. Available Pulse Magnets, Specifications

46

Lowest temperature
0.1 K

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

Independent
Experiment in 5 site

As an easy access to the megagauss science andtechnology, we have the single-turn coil (STC) systemcapable of generating the fields of up to 300 T by afast-capacitor of 200 kJ. We have two STC systems, one isa horizontal type (H-type) and the other is a vertical type(V-type, Fig. 4). Various kinds of laser spectroscopy experiments such as the cyclotron resonance and the Faraday
rotation using the H-type STC are available. On the other
hand, for very low-temperature experiments, a combinationof the V-type STC with a liquid helium bath cryostat is very
useful and the magnetization measurements at temperature
as low as 2 K can be performed up to 120 T with high precision.

Fig. 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.

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.

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.

Center of Computational
Materials Science
With the advancement of hardware and software
technologies, large-scale numerical calculations have been
making important contributions to materials science andwill have even greater impact on the field in the near future.
Center of Computational Materials Science (CCMS) is a
specialized research center for promoting computer-aided
materials science with massively parallel computers, suchas K-computer. The center has also been functioning as theheadquarters 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, biologicalmaterials, and solid state physics. ISSP made contracts with
9 universities and 2 national institutes for supporting theactivities of CMSI in which nearly 100 research groups are
involved. SY2015 was the final year of SPIRE, the MEXT
project that had been the main financial source of CMSI,
and CCMS has inherited some of the activities of CMSI.
Apart from the SPIRE, CCMS is handling various projects:
Project 7 and 5 of MEXT FLAGSHIP2020 Project (so-called"post-K computer project"), Element Strategy Initiative,
Professional Development Consortium for Computational
Materials Scientists (PCoMS). Through these activities,
CCMS has become the center of the community of computational condensed matter physics, in which researchers fromdifferent backgrounds work together on grand challenge
problems and develop computational infrastructures (newalgorithms, coding styles, standard software packages, etc).
The branch office of CCMS in the RIKEN AICS buildingon the Port Island Kobe was closed on March 2016, after
completing its mission of supporting CMSI researchers

Fig. 1. Members of Kobe branch office on the day of its closing

ISSP Activity Report 201547

getting together at the K-computer site to exchange ideas
of computational science, fine-tune various applications
software for the K-computer, and develop better contact withstaff members of RIKEN.
The following is the selected list of meetings organized
by CCMS in SY2015:• 05/11-13 The 3rd OpenMX/QMAS Workshop 2015,
Hands-on workshop on electronic structure methods“• 05/14 10sor network workshop -- Field 2 x 5 joint
workshop on new algorithms for quantum manybody
problems -• 05/25 “CMSI Hands-On: FMO Tutorial”• 06/01-06/19 New Perspectives in Spintronic andMesoscopic Physics ＜ NPSMP2015 ＞• 06/12 “CMSI Hands-On: ERmod Tutorial”• 07/30 “CMSI Hands-On: Rokko Tutorial”• 08/10-8/12 CMSI camp for application
development“TOKKUN!6”• 9/02 “Symposium on Collaboration between major
experimental facilities and supercomputers”• 9/07 “CMSI Hands-On: Version control system tutorial”• 9/08-10 The 12th CMSI Camp for Programming Skill
Developments• 11/09-11/11 The18th Asian Workshop on FirstPrinciples Electronic Structure Calculations• 12/07-12/08 The 6th CMSI Simposium• 12/09 Post-K Simposium• 01/21 The 12th CMSI Workshop for Industry-Academia
Collaboration “The programming environment
MateriApps LIVE!”• 03/05 The 4th TUT-CMSI Symposium for visualizationof computational materials science• 03/08 Workshop on topological materials

Laser and Synchrotron Research Center(LASOR Center)
Laser and Synchrotron Research (LASOR) Centerstarted from October, 2012. LASOR Center aims to promotematerial sciences using advanced photon technologies at
ISSP by combining the “Synchrotron Radiation Laboratory” and “Advanced Spectroscopy Group”. These twogroups have long histories since 1980’s and have kept strong
leaderships in each photon science fields for a long timein the world. In the past several decades, the synchrotronbased and laser-based photon sciences have made remarkable progresses independently. However, recent progresses

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

48

ISSP Activity Report 2015

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

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
spectroscopy, diffraction, light scattering, imaging, microscopy and fluorescence spectroscopy are in progress byemploying new coherent light sources based on laser andsynchrotron technologies that cover a wide spectral range
from X-ray to terahertz. In LASOR Center, a variety ofmaterials sciences for semiconductors, strongly-correlatedmaterials, molecular materials, surface and interfaces, andbio-materials are studied using advanced light sources andadvanced spectroscopy. Another important aim of LASOR
Center is the synergy of photon and materials sciences.
Most of the research activities on the extreme laser

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

Fig. 4. Newly designed building E was constructed for new extreme
VUV- and SX-lasers and new spectroscopy.

development and their applications to materials science
are performed in the ISSP buildings D and E at Kashiwa
Campus where large clean rooms and the vibration-isolated
floor are installed. On the other hand, the experiments
utilizing the advanced synchrotron source are performed at abeamline BL07LSU in SPring-8 (Hyogo).
• Extreme Laser Science GroupThe advancement of ultrashort-pulse laser technologies
in the past decade has transformed the laser development
at ISSP into three major directions, (i) towards ultrashortin the time domain, (ii) ultra high resolution in the spectral
domain, and (iii) the extension of the spectral range, withextreme controllability of the laser sources. For ultrafast
spectroscopy, we have developed carrier-envelope phasestable intense infrared light source that can produce sub-two
cycle optical pulses for high harmonic and attosecond pulse
generation. So far we observed coherent soft-X-ray radiation extending to a photon energy of ~330 eV. The simulation predicts the soft-X-ray field consists of single isolated
attosecond pulses. For ultra-high resolution spectroscopy,
fiber-laser-based light sources are intensively developed
for producing EUV pulses for high resolution and timeresolved photoemission spectroscopy as well as extending
the frequency comb to ultraviolet or infrared for various
applications. The spectral range of intense optical pulses arebeing extended from visible to IR, MIR and THz ranges.
Various types of high-repetition-rate ultrastable light sources

Fig. 6. 10-MHz high harmonic generation in an enhancement cavity.

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.
• Soft-X-ray and Materials Science Group
Recently, VUV and SX lasers have progressed very
rapidly. They become very powerful for the materials
science using the cutting-edge VUV and SX spectroscopy.
Especially, angle resolved photoemission spectroscopy(ARPES) is very powerful to know the solid state properties.
Laser has excellent properties, such as coherence, monochromaticity, polarization, ultra-short pulse, high intensity, andso on. By using monochromatic laser light, the resolutionof ARPES becomes about 70-μeV. The materials science
with sub-meV resolution-ARPES is improved drastically byusing high resolution laser. For examples, superconducting
gap anisotropy of the superconductors and Fermiology ofthe strongly correlated materials are studied very well. On
the other hand, using pulsed laser light, the time-resolved
photoemission in fs region becomes powerful to know therelaxation process of photo-excited states of the materials.
Furthermore, by using CW laser with circular polarization
in VUV region, the photoelectron microscopy (PEEM) isdeveloped. The spatial resolution of nm resolution is very
powerful for the study of nanomagnetic materials.

Fig. 7. Pump-probed photoemission system using 60-eV laser
Fig. 5. Phase-dependence of high harmonic spectra in soft X rays.

ISSP Activity Report 201549

Fig. 8. Photonics devices under study: (left panel) semiconductor
quantum wires and (right panel) firefly-bioluminescence system
consisting of light emitter (oxyluciferin) and enzyme (luciferase)• 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.

spectroscopy researches:
five endstations, i.e. timeresolved soft X-ray spectroscopy (TR-SX) equipped witha two-dimensional angleresolved time-of-flight(ARTOF) analyzer (Fig. 1),
three-dimensional (3D) nanoESCA station equipped with
the Scienta R-3000 analyzer(Fig. 2), high resolution soft
X-ray emission spectroscopy(XES) stations (Fig. 3) areregularly maintained by the
SRL staffs and open for publicuse, and at free-port station
many novel spectroscopic
tools have been developed andinstalled such as soft X-ray
resonant magneto-optical Kerr
effect (MOKE) (Fig.4) andsoft X-ray diffraction (Fig.
5), ambient pressure photoemission, two dimensional
Fig. 1. TR-SX station
photoelectron diffraction andso on. The beamline construction was completed in 2009 and SRL established the Harimabranch laboratory in SPring-8. At SPring-8 BL07LSU, each
end-station has achieved high performance: the TR-SX
station have established the laser-pump and SR-probe

Synchrotron Radiation Laboratory
The Synchrotron Radiation Laboratory (SRL) was established in 1975 as a research division dedicated to solid statephysics using synchrotron radiation (SR). Currently, SRL is
composed of two research sites, the Harima branch and theE-building of the Institute for Solid State Physics.
• Brilliant soft X-ray beamline at Harima branch
In 2006, the SRL staffs have joined the Materials
Research Division of the Synchrotron Radiation Research
Organization (SRRO) of the University of Tokyo and they
have played an essential role in constructing a new highbrilliant soft X-ray beamline, BL07LSU, in SPring-8. The
light source is the polarization-controlled 25-m long soft
X-ray undulator with electromagnetic phase shifters thatallow fast switching of the circularly (left, right) and linearly(vertical, horizontal) polarized photons.
The monochromator is equipped with a varied linespacing plain grating, which covers the photon energy range
from 250 eV to 2 keV. At the downstream of the beamline, a
lot of experimental stations have been developed for frontier

50

ISSP Activity Report 2015

Fig. 2. 3D-nano ESCA station

Fig. 3. Soft X-ray emission station

Fig. 4. Soft X-ray MOKE station

Fig. 5. Soft X-ray diffraction
stationchamber, a carousel chamber connected to a load-lockchamber, and a molecular beam epitaxy chamber, which
are kept ultra-high vacuum (UHV) environment and areconnected each other via UHV gate valves. The electrons are
excited with 6.994-eV photons, yielded by 6th harmonic of a
Nd:YVO4 quasi-continuous wave laser with repetition rate of
120 MHz. The hemispherical electron analyzer is a custommade ScientaOmicron DA30-L, modified for installing thespin detectors. The spectrometer is equipped with two highefficient spin detectors associating very low energy electron
diffraction are orthogonally placed each other, which allows
us to analyze the three-dimensional spin polarization ofelectrons. At the exit of the hemispherical analyzer, a multichannel plate and a CCD camera are also installed, whichenables us to perform simultaneously the angle-resolved
photoelectron spectroscopy with two-dimensional (energymomentum) detection. So far, spin-dependent band structuresof more than 10 materials have been studied by 4 outsidegroups.

method with the time-resolution of 50 ps which corresponds
to the SR pulse-width; the 3D nano-ESCA station reaches
the spatial resolution of 70 nm; the XES station provides
spectra with the energy resolution around 70 meV at 400 eV
and will enable real ambient pressure experiments in the near
future. Soft X-ray resonant MOKE station has been developed to make novel magneto-optical experiment using fastswitching of the polarization-controlled 25-m long soft X-ray
undulator. The soft X-ray diffraction station has been fully
constructed and the time-resolved measurement is available by using lasers at the TR-SX station. Each end-station
has now been opened fully to outside users. In 2015, 176
researchers made their experiments during the SPring-8
operation time of 4805 hours.
• High-resolution Laser SARPES at E-building
Spin- and angle-resolved photoelectron spectroscopy(SARPES) is a powerful technique to investigate the spindependent electronic states in solids. In FY 2014, Laser andSynchrotron Research Center (LASOR) SRL constructed
a new SARPES apparatus (Fig. 6), which was designed
to provide high-energy and -angular resolutions and highefficiency of spin detection using a laser light instead of thesynchrotron radiation in Institute for Solid State Physics. The
achieved energy resolution of 1.7 meV in SARPES spectra is
the highest in the world at present. From FY 2015, the new
SARPES system has been opened to outside users.
The Laser-SARPES system consists of an analysis

Fig. 6. Laser-SARPES system at E-building

ISSP Activity Report 201551

Conferences and Workshops
International Conferences and Workshops
New Perspectives in Spintronic and Mesoscopic Physics (NPSMP2015)

June 1 - 19, 2015
T. Kato and Y. Otani

Since 2006, the ISSP has organized an annual series of three-week workshops, with the only exception in 2011 due to theaftermath of the Tohoku earthquake. The last two in the series are “Emergent Quantum Phases in Condensed Matter – fromtopological to first-principles approaches” (EQPCM2013) and “New Horizon of Strongly Correlated Physics” (NHSCP2014).
In 2015, the ISSP organized the ninth workshop, “New Perspectives in Spintronic and Mesoscopic Physics” (NPSMP2015),
held for three weeks starting from the beginning of June.
The targets of this workshop are two important and related research areas, mesoscopic physics and spintronic physics.
Recent theoretical and experimental development deepens physics of mesoscopic systems, strengthening relationship toother research areas such as nonequilibrium statistical mechanics, quantum information, many-body quantum theory, fundamental theory of quantum mechanics, and so on. On the other hand, the spintronic physics covers spin-related phenomena
such as spin-dependent transport, spin injection, spin dynamics and so on. Although activity in spintronic physics is originally oriented to application, it includes important fundamental topics related to mesoscopic physics such as control andmeasurement of spin diffusion and spin current, physics of the Berry phase, and phenomena originated from spin-orbit
interaction. The purpose of this workshop is to share recent developments in these two research fields, to discuss important future issues, and to stimulate participants' motivation toward breakthrough in the interdisciplinary research area
between spintronic and mesoscopic physics. The program and presentation materials are available on the web at the URL
http://www.issp.u-tokyo.ac.jp/public/npsmp2015/index.html.
Following the tradition of the series, the workshop contained the intensive three-day symposium during Jun. 10–12, and
34 oral and 53 poster presentations (the largest number so far) were made there. The remaining part was arranged into a morerelaxing style providing a long discussion time, and 14 one-hour oral presentations and 15 half-a-hour oral presentations were
made. This style of workshop attracted many people; the cumulative number of participants during the three weeks summed up
to 649, and 320 of them attended the symposium part.
The NPSMP2015 workshop was organized by the ISSP and the Grant-in-Aid for Scientific Research on Innovative Areas“Nano Spin Conversion Science”. It was also supported by Computational Materials Science Initiative (CMSI), Elements
Strategy Initiative Center for Magnetic Materials (ESICMM), and Tokodai Institute for Element Strategy (TIES). The workshop
organizers were Takeo Kato (Chair, ISSP), Yoshichika Otani (Chair, ISSP), Sadamichi Maekawa (ASRC, Japan Atomic Energy
Agency), Gerrit E. W. Bauer (IMR, Tohoku University), Shingo Katsumoto (ISSP), Yasuhiro Tokura (University of Tsukuba),
Mikio Eto (Keio University), Gen Tatara (CEMS RIKEN), and Kensuke Kobayashi (Osaka University).

52

ISSP Activity Report 2015

The 18th Asian Workshop on First-Principles Electronic Structure Calculations
November 9 - 11, 2015
T. Ozaki, H. Akai, Y. Tatada, and O. Sugino
First-principles electronic structure calculations have been playing an invaluable role in characterizing and understanding
properties of materials and even in designing novel materials having better performance and/or exotic physical properties.
The Asian workshop is an annual series starting in 1998 to provide a forum for discussing all the important issues in computational condensed matter physics and materials science. The principal purpose of the workshop is to offer an opportunity forexchanging ideas and enjoying in-depth discussion both in the methodology in computational physics and chemistry and its
application to a wide variety of materials having not only fundamental significance and but also industrial importance. In thistime five plenary speakers in European countries and United States of America were invited, and 18 speakers were invitedfrom Asian countries. The discussion was focused on methodological development in first-principles methods, applications of
DFT to electric devices, molecular and spin dynamics, materials informatics, and topological insulators. Prof. Hutter of Zurich
University reported efficient implementations of many-body perturbation theories such as MP2 and RPA, and showed that it
is now possible to accurately perform molecular dynamics simulations even for bulk systems consisting of several hundred
atoms based on such many-body perturbation theories. The direction may lead to a wide variety of applications of MP2 andRPA to hydrogen bonded systems and molecular crystals in near future. Prof. Oganov of Skolkovo Institute of Science andTechnology presented evolutional algorithms to investigate unknown crystal structures and its impressive applications to highpressure phases including the H2S superconductor. Though it was considered even up to recent years that searching new crystal
structures is fundamentally difficult, the series of studies that his group did clearly demonstrates that prediction of crystal
structures is now feasible by combining DFT calculations and the evolutional algorithms. The prediction of crystal structures is a fundamental technology in materials informatics that many computational materials scientists have been recently
involved, and thereby his talk was a good occasion for researchers in Asian area to know the impressive progress. Prof. Wengof Chinese Academy of Sciences discussed materials exploration for topological insulators based on first-principles calculations in a very concise and informative style, which is one of emerging fields. It was quite impressive to hear that a lot of novel
materials proposed by his group have been already confirmed by experiments, which also demonstrates a recent progress offirst-principles calculations. We also had a poster session on the second day where there were more than a hundred presentations on methodological developments and applications. The accumulated number of participants is counted 409, suggesting
the workshop was successful. It was announced by the international committee members that the next workshop in 2016 will beheld in Hsinchu in Taiwan.
This workshop was financially supported by Institute for Solid State Physics (ISSP), the University of Tokyo, Computational Materials Science Initiative, The Asia Pacific Center for Theoretical Physics (APCTP), Elements Strategy Initiative for
Structural Materials, National Institute for Materials Science, SGI Japan, Ltd., Real Computing Inc., and X-Ability Co., Ltd.
The management of the workshop was performed by the research stuffs and secretaries of the related laboratories and CMSI.

ISSP Activity Report 201553

International Workshop: Topological Phenomena in Novel Quantum Matter: Laboratory
Realization of Relativistic Fermions and Spin Liquids

February 29 - March 4, 2016
C. Broholm, M. Oshikawa, and A. Rosch

Topology is a field of mathematics which classifies properties of mathematical structures which are robust under deformations. This field has recently emerged as a powerful paradigm to discover, classify, and investigate quantum properties ofmaterials. The international workshop exploring the forefront of this exciting field was held at and sponsored by Max-Planck
Institute for Physics of Complex Systems in Dresden, Germany, co-sponsored by TOPONET program of ISSP and by the
profile area ”Quantum Matter and Materials“ of the University of Cologne.
The workshop, which was attended by 90 participants, has focused on two classes of such topological quantum materials.
First, in Dirac matter topological properties are often intrinsically linked to the relativistic Dirac equation. Second in spin
systems geometry and spin-orbit coupling can suppress magnetic ordering and give rise to novel topological spin liquid states.
The workshop brought together experimental and theoretical physicists working in the two fields. It gave an overview on thetremendous scientific development especially in the last few years in the two fields.
The experimental and theoretical investigation of new topological quantum materials, such as topological insulators,
topological superconductors, and magnetic materials with strong spin-orbit interactions and frustration, was central to many key
contributions to the workshop. The classification of interacting topological states and routes towards their realization were alsoa major theme. Applications of concepts from solid state physics to quantum optics experiments were also discussed.
The latest development on magnetic skyrmion materials including their controlled creation and destruction by electricfields, the quest for experimental signature of Majorana fermions in spin liquids, the observation of the topologically quantizedelectromagnetic response of topological insulators, magnetic quantum oscillations without Fermi surfaces, and anomalous
magnetotransport were presented in inspiring talks.
Overall, the workshop was characterized by lively and intensive discussions until late in the night. In particular the poster
sessions offered a wealth of fresh experimental results and theoretical insights and highlighted the passion of young scientists
for the field. A brainstorming session on the most important future research directions in topological quantum matter showedthat this field is still at its infancy. Interacting topological states, experiments probing projective symmetries, strange metals andthe experimental realization of emergent gauge fields were only some of the research areas where the participants expect majoradvances in the near future.

54

ISSP Activity Report 2015

ISSP Workshops
ISSP Series Workshop on Synergetic Science for Functional Material Systems:(2) Soft Dynamics

April 2 - 3, 2015
O. Yamamuro, H. Mori, J. Yoshinobu, F. Komori, M. Shibayama, T. Suemoto,
H. Akiyama, O. Sugino, H. Noguchi, Y. Harada, I. Matsuda, and M. Lippmaa

This workshop is the second one among the series workshops on synergetic science for functional material systems, whichwere proposed and organized by the 12 members of ISSP working group for a future plan on a new research group of interdisciplinary area. The workshop was not on usual soft matter science, but focusing on the dynamics and related functionality characteristic of the soft materials listed below. We organized presentations including 18 invited talks and 26 contributed posters.
The topics of this workshop were (1) non-equilibrium dynamics and autonomic motor systems which are recently remarked
in statistical physics, (2) dynamics of proteins and DNA which has been a central research subject in biophysics, (3) dynamics
on surfaces and interfaces, (4) functional solids and polymers, and (5) dynamics of liquids, mesophases and membranes. These
spread across a wide research area.
We had 80 and 74 attendances for the first and second days, respectively, including many young researchers and people
from other universities and institutes. There was very active and fruitful discussion even though the subjects of the workshop
are not common in ISSP. This may show a high demand for a new research area in ISSP.

ISSP Activity Report 201555

International Workshop on Condensed Matter Physics & AdS/CFTMay 25 - 29, 2015
R. Meyer (Kavli IPMU), S.Nakamura, H. Ooguri, M. Oshikawa, M. Yamazaki, and H. Zhang

In 1997, a new duality between quantum field theories and gravity called the “gauge/string duality“ (AdS/CFT correspondence) originated from string theory. Recently, this duality is also applied to strongly correlated states of condensed mattersuch as the electronic states in high-Tc superconductors. This subject attracts the interest of string theorists, condensed matterphysicists and the gravitational community. The goal of this joint workshop with Kavli IPMU was to bring together key
members from these three communities to foster exchange in this direction and ignite further collaboration.
The program of the workshop consisted of 20 hourlong talks by internationally recognized experts, whogave excellent overviews over their respective topics
and at the same time presented cutting-edge research.
In total 122 participants (80 from Japan) attended theworkshop. 33 researchers from Japan and abroad used
the opportunity to present their work in the gong show
and poster presentation. The workshop focused on
three topics: (1) AdS/CFT, non-Fermi liquid phenomenology and high temperature superconductivity,(2) non-equilibrium physics and AdS/CFT, and (3)topological states of matter and entanglement entropy.
This workshop, supported by Kavli IPMU, ISSP,
and EU HoloGrav network, was unique in bringing
together condensed matter physicists and string
theorists nearly in a half-half ratio, which made it very
successful.

New Perspectives in Spintronic and Mesoscopic Physics (NPSMP2015)
June 10 - 12, 2015
T. Kato and Y. Otani
This ISSP workshop was held as the symposium part of the international workshop of the same title. See the section of“International Conferences and Workshops”.

ISSP Workshop: Basic Science for Supporting Materials Developments

June 10, 2015
M. Takigawa, H. Mori, O. Sugino, Y. Harada, and F. Komori

For society, industry, and economy of Japan, it is essential to develop useful and superior materials. Therefore, it is wishedthat the results of basic scientific research are effectively utilized for industrial applications for society and economy. In the
problems that industry really faces, there are a lot of the research subjects that are essential for the development of the basic
science. The workshop was held from viewpoints how the basic science contributes to the solution to industrial problems,and how the material scientists examine the scientific significance in them. Nine lectures on thesesubjects were delivered in the workshop, and there
was fruitful discussion among 98 participants.
The workshop provided an opportunity to reminda sentence in the prospectus of Institute for Solid
State Physics; a general and systematic study ofsolid state physics raises the research standard of
our country and contributes to development of theindustrial engineering. It is not easy to find a conclusive answer to the question how to promote the basic
science to support materials developments under
the present severe financial and economic conditions. Importance of the continuous examinations
and discussion on this subject is recognized again
from the wide viewpoints such as this workshop was
realized.

56

ISSP Activity Report 2015

ISSP Series Workshop on Synergetic Science for Functional Material Systems:(3) Reaction and Transport

June 24 - 26, 2015
J. Yoshinobu, H. Mori, F. Komori, M. Shibayama, T. Suemoto, O. Yamamuro,
H. Akiyama, O. Sugino, H. Noguchi, Y. Harada, I. Matsuda, and M. Lippmaa

This workshop focusing on “Reaction and Transport” in inhomogeneous systems is the third one among the series
workshops on synergetic science for functional material systems, which were proposed and organized by the 12 members of
ISSP working group for a future plan on a new research group of interdisciplinary area. In this workshop, we organized presentations including 29 invited talks and 40 contributed posters.
The topics of this workshop consists of (1) reaction and transport phenomena at surface and interface, such as catalysis,
photocatalysis, thin film growth etc. (2) charge dynamics in bulk and at interface (3) transport of atoms and ions such ashydrogen and proton in various materials and electrochemistry, and (4) reaction and transport in the systems from single
molecule to more complex bio-molecules.
We had 76, 85 and 50 attendances for the first, second and third days, respectively, including young researchers and students
from other universities and institutes. At the last session on 26 June, the present activities and the future plan of ISSP for
functional materials were presented, and we discussed on this issue and exchanged opinions between the organizers and participants very actively.

ISSP Activity Report 201557

ISSP Workshop on Glass Transition and Related Science

July 30 - August 1, 2015
O. Yamamuro, T. Odagaki, H. Tanaka, K. Miyazaki, K. Fukao, R. Nozaki, Y. Saruyama, and N. YamamuroThis is the largest domestic workshop on the glass transition which has been held every 2 – 4 years since 2002. The glasstransition is a mysterious phenomenon that a liquid is solidified without any structural change and its mechanism has not beenclarified yet. In the physical properties of glasses, there are also many unsolved problems (e.g., boson peaks) originating fromits non-periodic and disordered structure. Other than the works on the glass itself, there are many interesting phenomena related
to the glass transition such as spin glass transition, jamming transition of granular materials, dynamical transition in proteins,etc. It is meaningful to assemble both experimental and theoretical researchers of the areas mentioned above to exchange
current information and make discussion for future researches. We organized 32 oral and 41 poster presentations.
The topics of this workshop were (1) structures and entropy of glasses, (2) theories and computer simulations on glasses andsupercooled liquids, (3) glass transitions in polymer systems, (4) polyamorphism and liquid-liquid transitions, (5) dielectric spectroscopy for glasses
and liquids, (6) glass transition and shear thickening, (7) glass transition andjamming transition, (8) glass transition and phase transition in solid statephysics, and (9) glassy dynamics of soft matters and biological systems.
We had 95, 95 and 73 attendances for the first, second and third days,
respectively, including many young researchers and people from outsideof ISSP. There was very active and fruitful discussion throughout theworkshop.

Frontier of Physics on the Spin Systems

November 16 - 18, 2015
M. Oshikawa, N. Kawashima, K. Kindo, M. Takigawa, H. Tsunetsugu, M. Tokunaga, S. Nakatsuji,
Z. Hiro, H. Kawamura, H. Tanaka, H. Nojiri, M. Hagiwara, H. Kaneyasu, and T. Sakai

The physics of spin systems has been investigated very extensively. Even in the 21st century many new phenomena havebeen experimentally discovered, as well as many new theoretical concepts, in this field. At the present workshop we focusedon the following new phenomena; the quantum spin liquid, the quantum spin ice, the Bose-Einstein condensation of magnons,
the spin nematic phase, the chiral order, the Skirmion, the Z2 vortex, etc. More than 100 people attended the workshop and very
fruitful discussions were performed there. Particularly, young scientists’ presentations and comments were encouraged. One ofimportant purposes is to encourage communications between the experimentalists and the theoreticians, as well as between theexpertized and young scientists. We hope that the discussion at this workshop would lead to creations of some new concepts,
trends, or breakthroughs in this field in the near future.

58

ISSP Activity Report 2015

New Aspects of Excitonic Phases in Low-Dimensional Electronic Systems
November 26 - 28, 2015
T. Mizokawa, H. Fukuyama, H. Takagi, Y. Ohta, H. Sawa, Y. Uwatoko, H. Okamura, H. Yaguchi, and M. Tokunaga
Some semimetals or small-gap semiconductors may exhibit a phase transition to excitonic insulator that is characterized bycondensation of electron-hole pairs and can be described in BCS or BEC manners. Although the excitonic phase was theoretically predicted almost half a century ago, solid experimental evidence of the excitonic phase was not established until recently
due to limitation of candidate materials. Very recently, possibility of excitonic phases has been examined in new excitonic
insulator candidates such as TiSe2, Ta2NiSe5, and graphite. In addition, the concept of the excitonic phase would be extended
to describe charge fluctuations in various strongly correlated materials including cuprates, Fe pnictide/chalcogenide, organic
conductors, and heavy Fermion systems. In order to discuss the new aspects of the excitonic phase and its future prospects,
the present workshop was held at ISSP from November 26 to 28, 2015. In addition to the exciting results on the new excitonic
insulator candidates, fundamental relationship between the excitonic phase and the spin/charge/orbital fluctuations in various
strongly correlated systems has been reported and discussed by the speakers and the audiences during the workshop.

Research Frontier of Quantum Matter

December 8 - 9, 2015
T. Arima, K. Ishida, N. Nagaosa, K. Miyake, M. Oshikawa, S. Nakatsuji, and Z. Hiroi

In the past decade, large-scale research facilities have become increasingly important for the Institute’s mission, and thethree centers have been built: the LASOR laboratory houses unique laser and spectroscopy facilities, the IMGSL provides
magnetic fields of record strength, and a supercomputer center (SCC-ISSP) operated by the MDCL provides computational
resources. Each of these facilities provides a platform for in-house research and also serves a sizable outside user community.
In the next step, the ISSP expects an organizational reform of small science groups so as to stimulate interdisciplinary cooperation within ISSP. To accelerate this, the ISSP has a strategic plan that generates two new cross-divisional research groups;"quantum materials" and "functional materials" groups. The former will focus on topological quantum phases in correlatedelectron materials, while the latter aims to conduct fundamental research on materials with significant functional properties inareas of immediate societal needs.
This ISSP workshop was planned to give a chance to discuss on the direction and future prospect of the quantum materials
group both from inside and outside of the ISSP. Four review and fourteen presentations were given both from theory andexperimental sides. 79 (25 from inside) and 86 (38) people attended the workshop in the first and second days, respectively.
In addition, lively discussion was carried out among participants from various communities and from different points of view,which made the workshop very successful.

ISSP Activity Report 201559

Meeting of Quantum Turbulence and Classical Turbulence

January 5 - 7, 2016
M. Tsubota, T. Gotoh, K. A. Takeuchi, Y. Tsuji, Y. Fukumoto, H. Yano, and M. Yamashita

Quantum turbulence (QT) has been studied in the field of low temperature physics. Quantum turbulence refers to turbulence appearing in quantum condensed systems like superfluid helium and atomic Bose-Einstein condensates etc., typicallyconsisting of quantized vortices and giving a prototype of turbulence. On the other hand, classical turbulence (CT) has a long
research history, studied in the field of fluid mechanics. However, there has been little scientific communication between thescientists of quantum turbulence and those of classical turbulence. This workshop organized for the first time the scientificcollaboration between two different communities. There were 135 cumulative participants over three days, attending 28 oral
and 7 poster presentations and lively discussions.
Starting with review talks in both fields, the novel
original works were reported. In the afternoon of thelast day, a free discussion session “What can QT learn
from CT and what can CT learn from QT?” was held.
Very active discussions were performed about the basic
themes such as definition of turbulence.

ISSP Workshop: Status of SPring-8 BL07LSU -Integration of X-Ray Spectroscopy andDiffraction

March 1, 2016
H. Wadati, S. Shin, F. Komori, I. Matsuda, and Y. Harada

Synchrotron radiation laboratory has a Harima branch to maintain and develop a high-brilliance soft X-ray beamline
BL07LSU at SPring-8. There we are performing time-resolved, spatial-resolved and energy-resolved soft X-ray spectroscopy
to study electronic states and their dynamics of new materials. In this workshop, recent research activities at our beamline werereported and we discussed our new experimental techniques which integrate x-ray spectroscopy and diffraction. The speakers
talked about their recent results from each end station (time-resolved spectroscopy, 3D nano-ESCA, emission spectroscopy,
and so on). There were two invited talks; one is about synthesizing novel superconductors and the advantage of using synchrotron x-rays for finding new materials, and the other is about coherent x-ray scattering using synchrotron x-rays and x-ray freeelectron lasers. There were a lot of discussions for each talk, and we successfully
started to obtain a clear vision about our future experimental techniques combining x-ray spectroscopy and diffraction. We
also encouraged the young generation in this research field by awarding the best poster prize to one graduate student.

60

ISSP Activity Report 2015

ISSP Workshop: π-Electron and Hydrogen Coupled Functional Properties in MolecularMaterials

March 29, 2016
H. Mori and M. Yamashita

This workshop was intended to deepen the understanding and to make discussions on “π-electron-hydrogen coupledfunctional properties in molecular materials”. Recently, “π-electronic properties” and “hydrogen-related properties” have been
coupled towards novel “π-electron and hydrogen coupled functional properties” by the development of the coupled system,
a series of catechol-fused tetrathiafulvalene (TTF), in ISSP. In collaboration of chemists and physicists, several coupledfunctional properties have been unveiled: “the metallic state of purely organic single-unit crystal of κ-H3(Cat-EDT-ST)2”,“the quantum spin liquid state of κ-H3(Cat-EDT-TTF)2”, and “electronic switching induced by deuterium and charge transferof κ-D3(Cat-EDT-TTF)2 and κ-D3(Cat-EDT-ST)2”. However, the mechanism of the novel “hydrogen-π-electron coupledfunctional properties” is still non-trivial and the future prospects are open question.
The workshop consisted of two parts, experiment and theory sessions. The 10 experts and a graduate student gave 30 min
talks. The first talk was given by Dr. A. Ueda (ISSP) on the development π-electron-hydrogen coupled organic conductors
based upon Cat-TTFs. This talk was followed by Dr. T. Isono (NIMS) on the quantum spin liquid state observed by torqueand magnetic susceptibility measurements of the π-electron-hydrogen coupled organic magnet. In the afternoon session,
Prof. T. Itoh (Tokyo Science University) gave a talk on the quantum spin liquid and charge-ordered states of Cat-TTF systemobserved by 13C-NMR and 1H-NMR. Continuously, the quantum paraelectric state by dielectric measurement and thermochromism by optical measurement of κ-H3(Cat-EDT-TTF)2 was given a talk by Dr. K. Hashimoto (IMR, Tohoku Univ.). Dr. S.
Yamashita (Osaka Univ.) gave a talk on the ground states for the gapless quantum spin liquid state of κ-H3(Cat-EDT-TTF)2 andnon-magnetic state of κ-D3(Cat-EDT-TTF)2 by heat capacity measurements. The peculiar anisotropic thermal conductivity ofκ-H3(Cat-EDT-TTF)2 was given by Dr. M. Shimozawa (ISSP). Then, Prof. H. Okamoto introduced the responses by Tera-hertz
electric field for molecular conductors.
In the last session, the theoretical aspects of “π-electron-hydrogen coupled functional properties” were introduced anddiscussed. Dr. A. Naka (Tohoku Univ.) gave a talk on charge excitation and optical spectra of π-electron-hydrogen coupledmodel. Then, Mr. R. Yamamoto (Yokohama city Univ.) introduced the theoretical study of large H/D isotope effect by multicomponent DFT method. This talk was followed by Dr. T. Tsumuraya (NIMS) on the first-principal calculation of κ-H3/D3(CatEDT-TTF)2. Finally, Dr. H. Watanabe (Riken) gave a talk on covering weak to strong π-electron-hydrogen coupling region with
Variational Monte Carlo (VMC) method.
Although this workshop was organized in the end of academic year, 32 participants joined and made active discussion
on the current topics and future issues to be address for shedding light on the novel “π-electron-hydrogen coupled functional
properties” in the course of workshop. The program is available on the web at the URL: http://hmori.issp.u-tokyo.ac.jp/pdf/
program_201603_ISSPWS.pdf

ISSP Activity Report 2015

61

62

Subjects of Joint Research

ISSP Activity Report 2015

平成 27 年度 共同利用課題一覧（前期）/ Joint Research List (2015 First Term)
嘱託研究員 / Commission Researcher
No.

課題名

担当所員：森

氏名

所属

Title

Name

Organization

初果

1

プロトンと電子が相関する分子性導体の量子化学
立川
計算

仁典

横浜市立大学

大学院生命ナノ
Quantum chemical calculation of proton-electron correlated
システム科学研
molecular conductors
究科

Masanori Tachikawa

Yokohama City
University2

常圧で金属状態を示す純有機単一成分導体の開発 御崎

洋二

愛媛大学

大学院理工学研 Development of purely organic single-component molecular
metals under ambient pressure
究科Youji Misaki

Ehime University3

純有機単一成分超伝導体の開発

白旗

崇

愛媛大学

大学院理工学研 Development of purely organic single-component molecularsuperconductors
究科

Kenta Kimura

Ehime University

4

機能性生体系物質の開発

東

Masayo Azuma

Nagoya Institute ofTechnology

担当所員：中辻雅代

名古屋工業大学 しくみ領域

博

名古屋大学

Development of functional biomaterials

知5

X 線回析実験による非クラマース状態における幾澤
何学的フラストレーションの研究

大学院工学研究 X-ray diffraction study of geometrical frustration study of nonHiroshi Sawa
Kramers state科

Nagoya University6

価数異常に伴う量子臨界スケーリングの研究

三宅和正

豊田理化学研究
所

Theoretical study on quantum critical scaling associated withvalence instability

Kazumasa Miyake

Toyota Physical andChemical ResearchInstitute7

フラストレート磁性体における量子物性の探究

木村

健太

大阪大学

大学院基礎工学
The search for quantum state in frustrated magnets
研究科

Kenta Kimura

Osaka University8

極低温磁化装置の開発と磁気測定

柄木

良友

琉球大学

教育学部

Yoshitomo Karaki

University of the
Ryukyus9

価数揺動重い電子系イッテルビウム化合物におけ久我る量子臨界現象の解明

健太郎

大阪大学

大学院理学研究 Investigation of quantum critical phenomena in valencefluctuating and heavy fermion Yb-based compound科

Kentarou Kuga

Osaka University

Development of low temperature magnetic measurements

No.

課題名

担当所員：大谷

氏名

所属

Title

Name

Organization

義近
新見

康洋

大阪大学

大学院理学研究 Creation of spin current circuits using two-dimensional atomic
Yasuhiro Niimi
layers科

Osaka University11

合金表面における二酸化炭素の水素化に関する研
森川
究

良忠

大阪大学

大学院工学研究
Study on catalytic hydrogenation of CO2 on alloy surfaces
科

Yoshitada Morikawa

Osaka University

12

金属表面に吸着した生体関連分子の高分解能電子
米田
エネルギー損失分光による研究

忠弘

東北大学

多元物質科学研A HREELS study of biomolecules on metal surfaces
究所

Tadahiro Komeda

Tohoku University13

酸化物半導体光触媒における水分子の吸着と反応
松本
の研究

吉泰

京都大学

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

Yoshiyasu Matsumoto Kyoto University

14

エピタキシャルグラフェンの化学修飾と表面分光 Md. Zakir
による評価
Hossain群馬大学

大学院理工学府

10 2 次元原子層を利用したスピン流回路の創製
担当所員：吉信

担当所員：上床淳

Chemical modification of epitaxial graphene and its
spectroscopic characterization

Md. Zakir Hossain

Gunma University

Osaka University of
Economics and Law

美也

ISSP Activity Report 201563

15 有機伝導体の圧力効果

村田惠三

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

16 多重極限関連圧力装置の調整

高橋

博樹

日本大学

文理学部

Hiroki Takahashi

Nihon University

17 希土類化合物の単結晶試料評価とその圧力効果

藤原

哲也

山口大学

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

Tetsuya Fujiwara

Yamaguchi University

18 希土類 122 化合物における圧力効果

繁岡

透

山口大学

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

Toru Shigeoka

Yamaguchi University

19 磁性体の圧力効果

巨海玄道

久留米工業大学

Gendo Oomi

Kurume Institute ofTechnology

20 圧力下 NMR 測定法に関する開発

藤原

直樹

京都大学

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

Naoki Fujiwara

Kyoto University

21 低温用マルチアンビル装置の開発

辺土

正人

琉球大学

理学部

Masato Hedo

University of the
Ryukyus22 中性子回析に用いる圧力装置の開発

片野

進

埼玉大学

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

Susumu Katano

Saitama University

23 擬一次元有機物質の圧力下物性研究

糸井

充穂

日本大学

医学部

Miho Itoi

Nihon University

Adjustment of cubic anvil apparatus

Effect of pressure on the magnetic materials

Development of multi-anvil apparatus for low temperature

Study on pressure induced superconductivity of quasi organic
conductor

Murata

64

No.

課題名

氏名

所属

ISSP Activity Report 2015

Name

Organization

Development of apparatus for specific heat measurements
under high pressure

Izuru Umehara

Yokohama National
University

Development of the magnetometer

Takashi Naka

NIMS

24 高圧下の比熱測定装置の開発

梅原

出

横浜国立大学25 磁化測定装置の開発

名嘉節

物質・材料研究機構

26 AgPdCu 合金圧力セルを用いた磁場中比熱測定

河江

達也

九州大学

大学院工学府

Development of pressure cell for specific heat measurements
under magnetic fieldTastuya Kawae

Kyushu University

27 3d 遷移金属化合物の圧力下における磁気特性鹿又武

東北学院大学

工学総合研究所

Investigation of magnetic properties for 3d transitionintermetallic compounds under pressure

Takeshi Kanomata

Tohoku Gakuin
University

和幸

電気通信大学

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

KazuyukiMatsubayashi

The University
of ElectroCommunications

洋平

東京大学

大学院工学系研 Development of open source program package of massively
parallel solver for quantum lattice models
究科

Youhei Yamaji

The University of
Tokyo

三澤

貴宏

東京大学

大学院工学系研
究科

Takahiro Msawa

The University of
Tokyo

31

小型集束型小角散乱装置の高性能化及びそれによ
古坂
る応用研究

道弘

北海道大学

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

Michihiro Furusaka

Hokkaido University32

中性子散乱装置の共同利用・開発による強相関電岩佐子系物質の構造物性の研究

和晃

東北大学

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

Kazuaki Iwasa

Tohoku University

33

湾曲大型 2 次元中性子検出器と低温振動写真撮影
木村
装置の開発

宏之

東北大学

多元物質科学研 Development of Large-area curved two dimensional neutron
Hiroyuki Kimura
detector and Low temperature oscillating photographic device
究所

Tohoku University34

中性子散乱装置のアップグレードと共同利用研究
藤田
の推進

全基

東北大学

金属材料研究所

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

Masaki Fujita

Tohoku University35

中性子散乱装置のアップグレード後の研究計画の田畑
実施と共同利用の推進

吉計

京都大学

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

Yoshikazu Tabata

Kyoto University36

中性子散乱装置のアップグレード後の研究計画の松村
実施と共同利用の推進

武

広島大学

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

Takeshi Matsumura

Hiroshima University

37

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

直人

総合科学研究機
構

Masato Matsuura

CROSS

38

中性子分光器を用いた強相関電子系物質の微視的
桑原
研究

慶太郎

茨城大学

28

希釈冷凍機温度で使用可能な 10GPa 級超高圧発
松林生装置の開発担当所員：野口29

博司

高並列汎用量子格子模型ソルバー・パッケージの
山地
整備・公開

30

〃

担当所員：柴山

工学部

Title

〃

充弘

松浦

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

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

Ibaraki University

No.

課題名

氏名

所属

Title

Name

Organization

高度化した３軸分光器を用いた共同利用の推進と横山
物質科学研究の実施

淳

茨城大学

理学部

40 膜貫通ペプチドのフリップフロップ誘起能の評価 中野

実

富山大学

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

41 C1-3

杉山

正明

京都大学

原子炉実験所

Development of micro-focusing small-angle neutron scattering
spectrometer42

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

正裕

京都大学

原子炉実験所

Development of compact focusing SANS instrument andMasahiro Hino
improvement of cold neutron reflectometer and interferometer

43

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

雅暁

名古屋大学

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

Masaaki Kitaguchi

Nagoya University

44 流動場でのソフトマターの構造変化に関する研究 高橋

良彰

九州大学

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

Yoshiaki Takahashi

Kyushu University

45

三軸分光器を用いた極端条件下における物質科学
阿曽
研究の実施

尚文

琉球大学

理学部

Naofumi Aso

University of the
Ryukyus46

非干渉性中間散乱関数測定による非イオン界面活
川端
性剤ベシクルにおける腹面内拡散

庸平

首都大学東京大学院理工学研 Incoherent intermediate correlation function of lateral androtational diffusion in a nonionic vesicle
究科

Youhei Kawabata

Tokyo Metropolitan
University

Shinichi Itoh

KEK

39

ULS 極小角散乱装置 IRT

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

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

Masaaki Sugiyama

Ibaraki University
University of Toyama
Kyoto University
Kyoto University

47 中性子散乱研究計画の実施と共同利用の推進伊藤晋一

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

48 冷中性子干渉イメージング装置開発研究大竹淑恵

理化学研究所

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

Yoshie Otake

RIKEN

ISSP Activity Report 201549

三軸分光器の高度化およびそれを用いたスピンダ
佐藤
イナミクス研究卓

東北大学

多元物質科学研 Improvement of triple-axis spectrometer and its application to
the spin dynamics research
究所

Taku Sato

Tohoku University50

高度化した三軸分光器を用いた強相関電子系物質
南部
の研究

雄亮

東北大学

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

Yusuke Nambu

Tohoku University51

中性子散乱実験を用いたイオン液体系高分子溶液・ゲルの構造研究

藤井

健太

山口大学

大学院理工学研
Structural study of ionic liquid-based polymer system by SANS Kenta Fujii
究科52

ダイヤモンド型量子スピン鎖 K3Cu3AlO2(SO4)4のパルス強磁場中超強磁場磁化測定

満田節生

東京理科大学

理学部

Magnetization study on S=1/2 diamond chain system
K3Cu3AlO2(SO4)4 in pulsed ultra-high magnetic fields

Setsuo Mitsuda

Tokyo University of
Science

強磁場量子ビーム科学のためのパルスマグネット
鳴海
の開発

康雄

東北大学

金属材料研究所

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

Yasuo Narumi

Tohoku University

担当所員：金道
53

Yamaguchi University

浩一

65

66

No.

課題名

担当所員：辛

所属

Title

Name

Organization

埴ISSP Activity Report 2015

54 高温超伝導体の高分解能光電子分光
55

氏名

淳

東京大学

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

Atsushi Fujimori

The University of
Tokyo

香子

東京大学

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

Kyoko Ishizaka

The University of
Tokyo

東京大学

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

Takahiro Shimojima

The University of
Tokyo

Tsunehiro Takeuchi

Toyota Technological
Institute

藤森

60-eV レーザーを用いた時間分解光電子分光の開石坂
発

56 鉄系超伝導体のレーザー光電子分光

下志万

貴博

57 Bi 系超伝導体の角度分解光電子分光竹内恒博

豊田工業大学58 高分解能光電子分光による強相関物質の研究

横谷

尚睦

岡山大学

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

Takayoshi Yokoya

Okayama University

59 酸化バナジウムの高分解能光電子分光

江口

律子

岡山大学

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

Ritsuko Eguchi

Okayama University

60 有機化合物の光電子分光

金井要

東京理科大学

理工学部

Kaname Kanai

Tokyo University of
Science61 重い電子系ウラン化合物の高分解能光電子分光

藤森伸一

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

Shinichi Fujimori

JAEA

62 レーザー光電子分光による酸化物薄膜の研究

津田俊輔

物質・材料研究機構

Shunsuke Tsuda

NIMS

63 4f 電子系物質の高分解能光電子分光

松波雅治

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

Masaharu Matsunami

National Institutes of
Natural Sciences

64 超高空間分解能光電子顕微鏡による磁区構造観察 中川

剛志

九州大学

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

Takeshi Nakagawa

Kyushu University

65 Mn 化合物の時間分解光電子分光

大川

万里生

東京理科大学

理学部

Time resolved photoemission on Mn compounds

Mario Okawa

Tokyo University of
Science

66 収差補正型光電子顕微鏡の建設と利用研究

小嗣真人

東京理科大学

基礎工学部

Construction and utilization research of aberration correction
photoelectron emission microscopy

Masato Kotsugi

Tokyo University of
Science

67 時間分解・マイクロビームラインの開発と研究室隆桂之

高輝度光科学研究センター

Development of micr- and time-resolved beamline

Takayuki Muro

JASRI

Takayuki Kisu

Osaka University

Rikiya Yoshida

Hokkaido University

Angle-resolved photoemission study on high Tc cuprate

Photoemission study on organic compounds

Laser-photoemission study on oxide films

68

光電子分光法を用いた各種分子性結晶の電子状態
木須の研究及び装置の低温化

孝幸

大阪大学

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

69

時間分解光電子分光を用いた VO2 の研究と装置
の高度化

力矢

北海道大学

電子科学研究所

吉田Time-resolved photoemission study of VO2 and upgrade ofexperimental apparatus

No.

課題名

70 トポロジカル絶縁体の電子状態の解明
担当所員：松田

氏名
木村

所属

Title

昭夫

広島大学

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

理工学部

Name
Akio Kimura

Organization
Hiroshima University

巌

71

高輝度放射光軟 X 線を用いた時間分解光電子分光
近藤による表面ダイナミクス研究寛慶應義塾大学72

軟 X 線アンジュレータビームラインの分光光学系
雨宮
の開発研究

健太

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

奥田

太一

広島大学

74 光電子顕微鏡による磁性ナノ構造物質の磁化過程 木下豊彦

高輝度光科学研究センター

75

高輝度軟 X 線を利用した強相関物質の電子状態研
組頭
究

広志

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

76

時間分解光電子分光法による光触媒材料のキャリ
小澤
アダイナミクス研究健一

東京工業大学

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

Kenichi Ozawa

Tokyo Institute ofTechnology

木村

昭夫

広島大学

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

Akio Kimura

Hiroshima University

坂本

一之

千葉大学

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

Kazuyuki Sakamoto

Chiba University

寛

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

Hiroshi Daimon

Nara Instituteof Science andTechnology

Technical development of time-resolved photoelectron
diffraction experiment

Koichi Hayashi

Tohoku University

73 光電子スピン検出器の開発・研究

77 軟 X 線時間分解分光実験による磁性研究

ISSP Activity Report 201578

高輝度軟 X 線を利用する光電子顕微鏡装置の設
計・開発

79

二次元表示型スピン分解光電子エネルギー分析器
大門
の開発

東北大学

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

Kenta Amemiya

KEK

Taichi Okuda

Hiroshima University

Magnetization in process of magnetic nano structure by PEEM Toyohiko Kinoshita

金属材料研究所

Keio Universitt

JASRI

Hiroshi Kumigashira KEK

67

80 時間分解光電子回析実験の要素技術開発

林

81 分子吸着系における時間分解光電子分光の研究

間瀬一彦

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

Kazuhiko Mase

KEK

82 共鳴磁気光学カー効果の散乱理論研究田口宗孝

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

Munetaka Taguchi

Nara Instituteof Science andTechnology

83

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

英司

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

Eiji Hosono

AIST

84

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

大輔

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

Daisuke Asakura

AIST

担当所員：原田好一

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

慈久

68

No.
85

課題名

氏名

ISSP Activity Report 2015

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

86 時間分解光電子分光による重い電子系の研究

関山

87 高分解能光電子分光による酸化バナジウムの研究 藤原

所属

Title

Name

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

Organization

大一郎

筑波大学

数理物質系

明

大阪大学

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

Akira Sekiyama

Osaka University

秀紀

大阪大学

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

Hidenori Fujiwara

Osaka University

大阪大学

産業科学研究所

Suga Shigemasa

Osaka University

University of Tsukuba

88

軟 X 線発光・共鳴非弾性散乱分光の磁気円・線二菅
色性測定システムの構築

89

極小角Ｘ線散乱と軟Ｘ線吸収・発光分光によるソ
雨宮
フトマテリアルの物性研究

慶幸

東京大学

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

The University of
Tokyo

90

二次元原子薄膜トランジスタの電子状態のナノ分
吹留
析(Ⅰ)

博一

東北大学

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

Hirokazu Fukidome

Tohoku University

91 省エネ・創エネ・蓄電デバイスのオペランド分光 尾嶋

正治

東京大学

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

Masaharu Oshima

The University of
Tokyo

村上

洋一

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

Youichi Murakami

KEK

93

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

物質・材料研究機構

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

NIMS

94

共鳴軟Ｘ線散乱を用いた外場下での電子秩序状態
山崎
の解明

裕一

東京大学

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

大樹

92 共鳴硬・軟 X 線散乱による構造物性と磁性研究

大学院工学系研 Observation of electric ordered state under external field byresonant soft x-ray scattering
究科

Yuichi Yamasaki

The University ofTokyo

一般研究員 / General Researcher
No.

課題名

担当所員：榊原
1
2
3

氏名

所属

Title

Name

Organization

俊郎

強相関電子系準結晶の極低温物性の研究
〃

出口

和彦

名古屋大学

大学院理学研究 Low temperature study of strongly correlated electron
quasicrystal
科

Kazuhiko Deguchi

Nagoya University

松川

周矢

名古屋大学

大学院理学研究
科〃

Shuya Matsukawa

Nagoya University

淳

茨城大学

理学部

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

Makoto Yokoyama

Ibaraki University

強相関電子系化合物の秩序相に対する結晶対称性
横山
および軌道縮退の効果

No.

課題名

氏名

所属

4

〃

大高

凌

茨城大学

理学部

5

超伝導対称性決定のための実験的、理論的研究

町田

一成

岡山大学

大学院自然科学 Theoretical and experimental studies on determination of
pairing symmetry in superconductors
研究科

6

量子スピンアイス系 Yb2Ti2O7 の特異な磁気相転
安井
移

幸夫

明治大学

理工学部

7

CuO2 リボン鎖系 (Rb1-xCsx)2Cu2Mo3O12 の磁気
安井
的挙動

幸夫

明治大学

理工学部

8

単結晶 YbNi2Si2 の極低温磁化比熱測定

松本裕司

名古屋工業大学

大学院工学研究 Magnetization and specific heat measurements for single crystal
Yuji Matsumoto
YbNi2Si2 at low temperature
科

Nagoya Institute ofTechnology

9

六方晶 Tm2Pt6Ga15 及び Er2Pt6Ga15 の極低温磁大原化及び比熱測定繁男

名古屋工業大学

大学院工学研究 Magnetization and specific heat measurements for hexagonal
Er2Pt6Ga15 and Tm2Pt6Ga15 at low temperature
科

Shigeo Ohara

Nagoya Institute ofTechnology

Title

〃

Name

Organization

Ryo Otaka

Ibaraki University

Kazunari Machida

Osaka University

Anomalous magnetic transition of quantum spin Ice system
Yb2Ti2O7

Yukio Yasui

Meiji University

Magnetic behavior of CuO2 ribbon chain system(Rb1-xCsx)2Cu2Mo3O12

Yukio Yasui

Meiji University

10

〃

松本

裕司

名古屋工業大学

大学院工学研究
科〃

Yuji Matsumoto

Nagoya Institute ofTechnology

11

〃

植田

拓也

名古屋工業大学

大学院工学研究
科〃

Takuya Ueda

Nagoya Institute ofTechnology

ISSP Activity Report 201512

極低温磁化測定から検証する Tb2-xTi2+xO7 の長高津
距離秩序の起源

浩

首都大学東京大学院理工学研 Investigation of the long-range order of Tb2-xTi2+xO7 by means
Hiroshi Takatsu
of magnetization measurements
究科Tokyo Metropolitan
University

13

異方的超伝導ギャップを有する Y5Tr6Sn18(Tr; 遷
加瀬移金属 ) の超伝導ギャップ構造の研究

直樹

新潟大学

大学院自然科学 Superconducting gap symmetry of anisotropic superconductor
Kase Naoki
Y5Tr6Sn18 (Tr; transition metal)
研究科

Niigata University

照井

祐輔

新潟大学

工学部

Niigata University

極低温磁化測定による SmTr2Zn20 (Tr = Rh, Ir)
加瀬の磁場誘起相転移の検証

直樹

新潟大学

大学院自然科学 Study of field-induced order of SmTr2Zn20 (Tr = Rh, Ir) by lowNaoki Kase
temperature magnetization measurements
研究科

14
15

〃

16

〃

棚橋

正貴

新潟大学

工学部

17

ルテニウム酸化物超伝導体 Sr2RuO4 の一軸性圧力下における比熱測定

矢口宏

東京理科大学

理工学部

18

〃

山崎

照夫

東京理科大学

理工学部

高圧合成法による新規パイロクロア型遷移金属化
有馬
合物の探索

孝尚

東京大学

浩樹

東京大学

19

69

20

〃

鷲見

〃

〃
Specific-heat measurements of the ruthenate superconductor
Sr2RuO4 under uniaxial pressure

Yuusuke Terui

Niigata University

Masataka Tanahashi Niigata University
Hiroshi Yaguchi

Tokyo University of
Science

Teruo Yamazaki

Tokyo University of
Science

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

The University ofTokyo

大学院新領域創成科学研究科

Hiroki Sumi

The University of
Tokyo

〃

〃

70

No.
21

課題名

氏名

ISSP Activity Report 2015

フェルダジルラジカルを用いた新規電荷移動錯体
山口の低温磁気測定

博則

Title

Name

Organization

大阪府立大学

大学院理学系研 Low temperature magnetic properties of verdazyl-based chargeHironori Yamaguchi
transfer complexes
究科

Osaka Prefecture
University

大阪府立大学

理学部〃

Yuta Sasaki

Osaka Prefecture
University〃

Masataka Okada

Osaka Prefecture
University

22

〃

佐々木

23

〃

岡田

将孝

大阪府立大学

理学部

24 強相関伝導系のパルス磁場中の超音波測定

吉澤

正人

岩手大学

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

Masahito Yoshizawa

Iwate University

25

納口

昇也

岩手大学

大学院工学研究科

Syoya Noguchi

Iwate University

高圧合成法による新規パイロクロア型遷移金属化
徳永
合物の探索

祐介

東京大学

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

Yusuke Tokunaga

The University of
Tokyo

康弘

名古屋大学

大学院理学研究 Magnetic field induced transition in an organic Mott insulator
with one-dimensional triangular lattice
科

Yasuhiro Shimizu

Nagoya University

聡大

名古屋大学

理学部

Akihiro Ono

Nagoya University

静岡大学

大学院理学研究 Low temperature physical properties at magnetic fields in Yb
and Ce compounds
科

Takao Ebihara

Shizuoka University

健治

弘前大学

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

Itaka Kenji

Hirosaki University

伸太郎

東京工業大学

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

Shintaro Yasui

Tokyo Institute ofTechnology

Mihee Lee

Nara Instituteof Science andTechnology

Taro Yamada

The University of
Tokyo

26

〃

担当所員：瀧川27

有機一次元三角格子モット絶縁体における磁場誘清水
起相転移の探索〃小野

Ce および Yb 化合物における磁場中ミリケルビ
ン領域での物性測定海老原

担当所員：中辻

太陽電池用シリコン還元プロセスにおけるフラッ伊高
クス効果の評価33

安井

遷移金属酸化物界面ヘテロ界面金属層の起源の解李明

担当所員：吉信孝雄

ミック

31 新規ウルツァイト型四面体強誘電体材料の創成
32

〃

知

担当所員：リップマー
30

〃

仁

28

29

裕太

所属

美希

奈良先端科学技 物質創成科学研 Origin of metallic conductivity at transition metal oxides
interface
術大学院大学究科淳

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

山田

太郎

東京大学

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

No.

課題名

氏名

Title

Name

Organization真也

横浜国立大学

大学院工学研究 FTIR measurements of metastable physisorption processes on
Si(001)
院

Shinya Ohno

Yokohama National
University

正太郎

横浜国立大学

理工学部

Shotaro Shimizu

Yokohama National
University

STM による Ag(110) 上の二次元 TiO2 ナノシート
枝元
の構造解析

一之

立教大学

理学部

STM study of the structure of two-dimensional TiO2 nanosheets
Kazuyuki Edamoto
formed on Ag(110)

Rikkyo University

37 パラジウム表面における水添触媒反応機構の解明 福谷

克之

東京大学

生産技術研究所

Elucidation of the mechanism of hydrogenation reaction on Pd
Katsuyuki Fukutani
surfaces

The University of
Tokyo

東京大学

生産技術研究所〃

Markus Wilde

The University of
Tokyo

34

Si(001) 表面上の準安定物理吸着過程の透過 FTIR
大野
測定

所属

35
36

〃

清水

38

〃

ビルデ
カス

39

〃

小倉

正平

東京大学

生産技術研究所〃

Shohei Ogura

The University of
Tokyo

40

〃

大野

哲

東京大学

生産技術研究所〃

Satoshi Ohno

The University of
Tokyo

彰三

東北大学

大学院理学系研 Initial oxidation process of hydrogen-terminated Si(110)-(1 × 1)
Shozo Suto
surfaces
究科

Tohoku University

絵里奈

東北大学

大学院理学系研
究科

Erina Kawamoto

Tohoku University

昭

兵庫医科大学

Akira Fukuda

Hyogo College ofMedicine

寺澤大樹

兵庫医科大学

Daiju Terasawa

Hyogo College ofMedicine45

再放出低速陽電子による TiO2(110) 表面および表松本
面近傍の欠陥密度の研究

益明

東京学芸大学

教育学部

Study of the surface and subsurface defect densities on
TiO2(110) by re-emitted slow positrons

Masuaki Matsumoto

Tokyo Gakugei
University

46

金属／半導体表面上ナノ構造の形成とナノ構造を河村持つ表面における光学応答の時間分解測定

紀一

日本放送協会

放送技術研究所

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

Norikazu Kawamura Nippon Hoso Kyokai

寛東京工業大学

大学院総合理工 Hydrogen absorption at the interface of Ag thin film andSi(111) substrate
学研究科

育三

東京学芸大学

教育学部

41

水素終端 Si(110)-(1 × 1) 表面の初期酸化過程の研
須藤
究

42

〃

担当所員：勝本

ISSP Activity Report 201543

量子ホール効果測定のための高移動度半導体試料
福田作成〃

担当所員：小森〃信吾

44

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

文夫

47 Ag 超薄膜 /Si(111) 基板界面への水素吸蔵

71

48

川本

マー

〃

中辻

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

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

Kan Nakatsuji

Tokyo Institute ofTechnology

Ikuzo Kanazawa

Tokyo Gakugei
University

72

No.

課題名

49

〃

ISSP Activity Report 201550

氏名
東京学芸大学

大学院教育学研
究科

育三

東京学芸大学

教育学部

東京学芸大学

大学院教育学研
究科

Al-Pd-Mn 準結晶と Al-Pd-Mn-Si 近似結晶におけ金沢る空孔濃度の系統的な研究〃

52

Si(111)-7 × 7 表面における Fe クラスターの形成
楊と磁性に関する研究担当所員：長谷川
53

恵利華

今井

51

佐々木

友彰

昊宇

Title

〃
Positron-annihilation studies of Al-Pd-Mn quasicrystal and AlPd-Mn-Si approximant crystals

Name

Organization

Imai Erika

Tokyo Gakugei
University

Ikuzo

Tokyo Gakugei
University

Kanazawa

Tomoaki Sasaki

Tokyo Gakugei
University

奈良先端科学技 物質創成科学研 A Study on the formation of iron clusters and magnetism on
Si(111)-7 × 7 surfaces
術大学院大学究科

Yang Haoyu

Nara Instituteof Science andTechnology

大学院マテリア
Low temp. STM investigation of epitaxial silicene and北陸先端科学技
ルサイエンス研
germanium on diboride
術大学院大学
究科

Yukiko Takamura

Japan Advanced
Institute of Science andTechnology〃

Antoine Fleurence

Japan Advanced
Institute of Science andTechnology〃

Florian Gimbert

Japan Advanced
Institute of Science andTechnology〃

Tobias Gill

Japan Advanced
Institute of Science andTechnology〃

幸雄

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

由起子

54

〃

アントワーヌ
フロランス

55

〃

フローリアン
ジャンベー
ル

56

〃

トバイアス
ギル

57

所属

重い電子系超伝導の実空間観察のための超低温・河江
強磁場の小型 STM の開発

達也

大学院マテリア
北陸先端科学技
ルサイエンス研
術大学院大学
究科
大学院マテリア
北陸先端科学技
ルサイエンス研
術大学院大学
究科
大学院マテリア
北陸先端科学技
ルサイエンス研
術大学院大学
究科
九州大学

大学院工学研究 Development of a miniature STM for low-temperature andhigh-eld measurements of heavy fermion superconductors
院

Tastuya Kawae

Kyushu University

58〃

イスラム モハメド サイフル

九州大学

大学院工学府〃

Md. Saiful Islam

Kyushu University

59

〃

高田

弘樹

九州大学

大学院工学府〃

Hiroki Takata

Kyushu University60

超流動 He-3,A1 相中のスピン流れと電場の交差
相関の探索

山口

明

兵庫県立大学

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

Akira Yamaguchi

The University of
Hyogo

61

〃

白濱

圭也

慶應義塾大学

理工学部〃

Keiya Shirahama

keio Universitt

62

〃

村川

智

慶應義塾大学

理工学部〃

Satoshi Murakawa

keio Universitt

63

〃

互井

通裕

慶應義塾大学

理工学部〃

Michihiro Tagai

keio Universitt

担当所員：山下

穣

No.

課題名

担当所員：上床

氏名

所属

Title

Name

Organization

美也

64 価数揺動 Yb 系準結晶における高圧下物性研究

出口

和彦

名古屋大学

大学院理学研究
High-pressure study on mixed-valence Yb-quasicrystal
科

Kazuhiko Deguchi

Nagoya University

65

松川

周矢

名古屋大学

大学院理学研究
科

Shuya Matsukawa

Nagoya University

66 価数揺動物質の圧力下電子状態研究

井村

敬一郎

名古屋大学

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

Keiichiro Imura

Nagoya University

67

河出

直哉

名古屋大学

大学院理学研究
科

Naoya Kawade

Nagoya University

和氣

剛

京都大学

大学院工学研究 Resistivity measurement on a cluster compound V4S9Br4 underTakeshi Wakihigh pressure
科

Kyoto University

史憲

東北大学

Effect of pressure on the physical properties of EuTGe3 (T:金属材料研究所 transition metal) without inversion symmetry in the crystal
structure

Fuminori Honda

Tohoku University

惇睦

琉球大学

理学部

Yoshichika Onuki

University of the
Ryukyus出鹿児島大学

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

Kagoshima University

藤本

祐太郎

鹿児島大学

大学院理工学研
究科

Yutaro Fujimoto

Kagoshima University

鳥塚

潔

法政大学

理工学部

Kiyoshi Torizuka

Hosei University

暁弘

九州大学

大学院理学研究 Measurement of electrical resistivity under high pressure of EuAkihiro Mitsuda
based compound with valence ordering phase
院

Kyushu University
Kyushu University〃〃

68 クラスタ化合物 V4S9Br4 の圧力下電気抵抗測定
69
70
71
72

結晶構造に反転対称性のない EuTGe3(T: 遷移金本多属）の高圧下物性研究〃

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

ISSP Activity Report 2015

73 有機分子性導体の高圧物性の研究
74

大貫

価数秩序相を持つ Eu 化合物の圧力下電気抵抗測
光田
定

〃

〃

〃

〃
Studies on high pressure properties of organic molecular
conductors

73

75

〃

甲木

義人

九州大学

大学院理学府〃76

BaTi2(Sb1-xBix)2O における超伝導転移温度の圧
力依存性

山本

隆文

京都大学

大学院工学研究 Pressure dependence of superconducting temperature of
BaTi2(Sb1-xBix)2O科

Takafumi Yamamoto Kyoto University

77

〃

小林

洋治

京都大学

大学院工学研究
科〃

Yoji Kobayashi

Kyoto University

78

〃

竹入

史隆

京都大学

大学院工学研究
科〃

Takeiri Fumitaka

Kyoto University

79

〃

村上

泰斗

京都大学

大学院工学研究
科〃

Taito Murakami

Kyoto University

Yoshito Katsuki

74

No.

ISSP Activity Report 2015

課題名

氏名

80 高圧下における Yb4As3 の電荷秩序−無秩序転移 中村修

岡山理科大学

学外連携推進室 Charge order-disorder transition in Yb4As3 under high pressure Osamu Nakamura

Okayama University of
Science

81 新規三元化合物 EuCuP2 の輸送特性

繁岡

透

山口大学

大学院理工学研Transport property of the novel ternary compound EuCuP2
究科

Toru Shigeoka

Yamaguchi University

82

藤原

哲也

山口大学

大学院理工学研
究科

Tetsuya Fujiwara

Yamaguchi University

透

山口大学

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

Toru Shigeoka

Yamaguchi University

藤原

哲也

山口大学

大学院理工学研
究科

Tetsuya Fujiwara

Yamaguchi University

85 YbMn2Ge2 の高圧力下磁化測定 (2)

繁岡

透

山口大学

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

Toru Shigeoka

Yamaguchi University

86

藤原

哲也

山口大学

大学院理工学研
究科

Tetsuya Fujiwara

Yamaguchi University

87 重い電子系物質 Yb2Pt6Al15 の高圧下電気抵抗

松本裕司

名古屋工業大学

大学院工学研究 Electrical resistivity measurements under high pressure forheavy fermion Yb2Pt6Al15
科Yuji Matsumoto

Nagoya Institute ofTechnology

88

〃

植田

拓也

名古屋工業大学

大学院工学研究
科

Takuya Ueda

Nagoya Institute ofTechnology

89

充填スクッテルダイト EuFe4As12 の圧力下電気
抵抗

川村

幸裕

室蘭工業大学

大学院工学研究 Electrical resistivity study of filled skutterudite EuFe4As12 under
Yukihiro Kawamurapressure科

Muroran Institute ofTechnology

90 YbCo2Zn20 の Co 元素位置の置換効果

阿曽

尚文

琉球大学

理学部

Naofumi Aso

University of the
Ryukyus

91

比嘉

泰之

琉球大学

大学院理工学研
究科

Yasuyuki higa

University of the
Ryukyus

92 YbCo2Zn20 の Zn 元素位置の置換効果

阿曽

尚文

琉球大学

理学部

Naofumi Aso

University of the
Ryukyus

93

高村

治希

琉球大学

理学部

Haruki Takamura

University of the
Ryukyus94

ホイスラー型強磁性形状記憶合金の格子定数の圧
安達
力依存性

義也

山形大学

大学院理工学研 Pressure dependence of the lattice constants for the Heusler
type ferromagnetic shape memory alloys
究科

Yoshiya Adachi

Yamagata University

95

希土類化合物 R2T3Ge5 (R: 希土類元素 ) の高圧下
中島
物性

美帆

信州大学

理学部

大翔

信州大学

理学部

83
84

96

〃

Ce-Zn-Ge 三元系新規化合物の合成および単結晶
繁岡
育成 (2)
〃

〃

〃

〃

〃

竹原

所属

Title

〃

〃

〃

〃

Substitution effect at Co element in YbCo2Zn20〃
Substitution effect at Zn element in YbCo2Zn20〃

Name

Physical Properties of Rare Earth Coumpound R2T3Ge5 (R: Rare
Miho Nakashima
Earth metal) under High Pressure〃

Hiroto Takehara

Organization

Shinshu University
Shinshu University

No.

課題名

氏名

所属

Title

Name

Organization

Naoya Takeda

Niigata University

Sakiko Koda

Niigata University

Keiya Shirahama

keio Universitt

97 新規磁性超伝導体の探索

武田

直也

新潟大学

工学部

98

古田

沙紀子

新潟大学

大学院自然科学研究科

99 回転希釈冷凍機を用いた量子液体・固体研究白濱圭也

慶應義塾大学

理工学部

100

〃

高橋

大輔

足利工業大学

共通課程〃

Daisuke Takahashi

Ashikaga Institute ofTechnology

101

〃

村川

智

慶應義塾大学

理工学部〃

Satoshi Murakawa

keio Universitt

102

〃

立木

智也

慶應義塾大学

大学院理工学研
究科〃

Tomoya Tsuikikeio Universitt

103

導電性ラングミュア・ブロジェット膜の高圧下の三浦
電気的性質に関する研究

康弘

桐蔭横浜大学

大学院工学研究 Studies on electrical properties of conductive langmuir-blodgett
Yasuhiro Miurafilms under high pressure
科

Toin University of
Yokohama

104

ペロブスカイト酸化物 PbVO3 の高圧下電気輸送
岡
特性の測定

中央大学

理工学部

Investigation of the electronic transport of perovskite PbVO3
under high-pressure

Kengo Oka

Chuo University

105

重い電子系物質における 3He 温度領域での磁化
測定

〃

研吾

Exploration of new magnetic superconductor〃
Study of quantum fluids and solids using rotating dilution
refrigerator

ISSP Activity Report 2015

75

河江

達也

九州大学

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

Tastuya Kawae

Kyushu University

106 擬三元系 (Ho,R)Rh2Si2 単結晶の磁気特性

繁岡

透

山口大学

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

Toru Shigeoka

Yamaguchi University

107

藤原

哲也

山口大学

大学院理工学研
究科

Tetsuya Fujiwara

Yamaguchi University

繁岡

透

山口大学

大学院理工学研 Magnetic transition of polymorphic compound RIr2Si2 (R=rera
Toru Shigeoka
earth) 4
究科

Yamaguchi University

藤原

哲也

山口大学

大学院理工学研
究科

Tetsuya Fujiwara

Yamaguchi University

110 梯子型鉄系化合物の圧力効果

大串

研也

東北大学

大学院理学研究
High-pressure effect on Fe-based ladder compounds
科

Kenya Ohgushi

Tohoku University

111 価数揺動物質の高圧力中輸送特性の研究

仲間

隆男

琉球大学

理学部

Takao Nakama

University of the
Ryukyus

112

赤嶺

拡

琉球大学

大学院理工学研
究科

Hiromu Akamine

University of the
Ryukyus

仲間

隆男

琉球大学

理学部

Takao Nakama

University of the
Ryukyus〃108 多形化合物 RIr2Si2(R= 希土類）の磁気転移
109

〃

〃

113 遷移金属化合物の高圧力下の輸送特性

4

〃

〃

Trasport properties of valence fluctuating compounds underpressure〃
Pressure effect on transport properties of transition metalcompounds

76
ISSP Activity Report 2015

No.

課題名

氏名

所属

114

〃

照屋

淳志

琉球大学

115

〃

屋良

朝之

116 層状希土類化合物の単結晶育成と圧力下輸送特性 中野
117

Title

Name

大学院理工学研
究科〃

Atsusi Teruya

University of the
Ryukyus

琉球大学

理学部

〃

Tomoyuki Yara

University of the
Ryukyus智仁

新潟大学

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

Niigata University

高橋

英亮

新潟大学

工学部

Eisuke Takahashi

Niigata University

希土類化合物における量子臨界現象の探索とその
中野
圧力効果

智仁

新潟大学

大学院自然科学 Investigation of quantum critical phenomena in rare earth
compounds and its pressure effect研究科

Nakano Tomohito

Niigata University

上杉

和哉

新潟大学

工学部

〃

Kazuya Uesugi

Niigata University

120 TmB4 の磁気準周期秩序相における圧力効果

伊賀

文俊

茨城大学

理学部

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

Fumitoshi Iga

Ibaraki University

121

〃

道村

真司

埼玉大学

研究機構科学分
析支援センター

Shinji Michimura

Saitama University

122

超流動ヘリウム 3 ー A 相での半整数量子渦の検
出

石川

修六

大阪市立大学

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

Osaka City University123

空間反転対称性を欠いた系 CeNiC2 の圧力下での片野
磁気秩序と超伝導進

埼玉大学

大学院理工学研 Magnetic ordering and superconductivity of the noncentrosymmetric system CeNiC2 under high pressure
究科

Susumu Katano

Saitama University

124 多重極限下のゼーベック係数測定システムの開発 辺土

正人

琉球大学

理学部

Development of new Seebeck coefficient measurement system
under multiple extreme conditions

Masato Hedo

University of the
Ryukyus

125

友利

圭佑

琉球大学

大学院理工学研
究科〃

Tomori Keisuke

University of the
Ryukyus

空間反転対称性のない遷移金属間化合物とその関
辺土
連物質の高圧下輸送特性

正人

琉球大学

理学部

垣花

将司

琉球大学

大学院理工学研
究科

鉄系超伝導体 FeSe の純良単結晶における圧力誘芝内起相転移の研究孝禎

東京大学

大学院新領域創 Studies on the pressure-induced phase transition in clean single
Takasada Shibauchi
crystals of iron-based superconductor FeSe
成科学研究科The University of
Tokyo

118
119

126
127
128

〃

〃

〃

〃

〃

〃

Transport properties of non-centrosymmetric transition metals
Masato Hedo
compounds under high pressure〃

Masashi Kakihana

Organization

University of the
Ryukyus
University of the
Ryukyus

129

〃

水上

雄太

東京大学

大学院新領域創成科学研究科〃Yuta Mizukami

The University of
Tokyo

130

〃

松浦

康平

東京大学

工学部

〃

Kouhei Matsuura

The University of
Tokyo

No.

課題名

氏名

所属

Title

Name

Organization

131 Cr 系遍歴磁性体の圧力効果

三井

好古

鹿児島大学

大学院理工学研
Pressure effect on the Cr-based itinerant magnetic materials
究科

Yoshifuru Mitsui

Kagoshima University

132

吉永

総志

鹿児島大学

理学部

Soushi Yoshinaga

Kagoshima University

133 低次元銅酸化物超伝導体の圧力効果

久田

旭彦

徳島大学

大学院ソシオ・アーツ・アンド・サ Pressure effect on low-dimensional cuprate superconductor
イエンス研究部

Hisada Akihiko

The University ofTokushima

134

藤原

直樹

京都大学

大学院人間・環境学研究科

Naoki Fujiwara

Kyoto University

135 希土類炭化物の高圧下抵抗率の研究

山浦淳一

東京工業大学

元素戦略研究セ
Study of high-pressure resistivity on rare earth carbide
ンター

Junichi Yamaura

Tokyo Institute ofTechnology

136

小林

賢介

高エネルギー加 物質構造科学研
速器研究機構究所

Kensuke Kobayashi

KEK

村田

惠三

大阪市立大学

大学院理学研究 Development of high pressure experimental method applicable
Keizo Murata
to organic conductors
科

Osaka City University

ホイスラー化合物強磁性体 Fe2Mn1-xVxSi の高圧
伊藤
化電気抵抗率測定

昌和

鹿児島大学

大学院理工学研 Electrical resistivity of Heusler compound Fe2Mn1-xVxSi underpressure
究科

Masakazu Ito

Kagoshima University

桑原

脩人

鹿児島大学

大学院理工学研
究科

Syuto Kuwahara

Kagoshima University

カゴ状化合物 CeT9X4(T: 遷移金属 ,X:Ge,Si) の圧
広瀬
力下電気抵抗測定

雄介

新潟大学

理学部

佐藤

翔子

新潟大学

大学院自然科学研究科

142 圧力下磁場中点接合分光実験の試み

本山

岳

島根大学

143

小川

翔平

〃

〃

〃

137 有機伝導体に適した高圧実験の測定法の開発
138
139
140

ISSP Activity Report 2015

141

144

〃

〃

〃

〃

〃

〃

〃

Electrical resistivity measurement of cage structure compounds
YusukeCeT9X4 (T:Transition Metal, X:Si,Ge) under high pressure

Niigata University

Shoko Satoh

Niigata University

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

Gaku Motoyama

Shimane University

島根大学

大学院総合理工学研究科

Shohei Ogawa

Shimane University

大

東北大学

金属材料研究所

Dai Aoki

Tohoku University

UT2X2 (T: 遷移金属 , X: Si, Ge) の反強磁性の圧
青木
力効果

〃

Hirose〃Effect of pressure on the antiferromagnetism of UT2Si2 (T:transition metal, X: Si, Ge)

77

145

〃

本多

史憲

東北大学

金属材料研究所〃

Fuminori Honda

Tohoku University

146

〃

志村

康成

東北大学

大学院工学研究
科〃

Yasunari Shimura

Tohoku University

日本橋学館大学

リベラルアーツ Fundamental study of new types of superfluidity, as seen insolid 4He
学部

Minoru Kubota

Nihonbashi Gakkan
University

147

固体ヘリウムの超流動に見られる様な「新規超流久保田
動現象の基礎研究」

実

78

No.

課題名

氏名

所属

ISSP Activity Report 2015

148 Mg2Si 熱電半導体の高圧下ホール効果測定

財部健一

岡山理科大学

理学部

149

安井

望

岡山理科大学

大学院理学研究科

三角格子磁性体150 NaM(Acac)3benzen(M=Fe,Ni,Co,Mn) の低温磁 柄木
性

良友

琉球大学

教育学部

151 YbCo2Zn20 の Co 元素の置換効果

小林

理気

琉球大学

原田

健自

153 Fe 系 MAX 相化合物の高圧合成

和氣

154 遍歴電子磁性体の圧力効果

岡本〃

担当所員：川島

155

NameHigh-pressure Hall effect measurement in Mg2Si thermoelectric
Kenichi Takarabe
semiconductor

Organization
Okayama University of
ScienceNozomu Yasui

Okayama University of
Science

Yoshitomo Karaki

University of the
Ryukyus

琉球大学理学部 Substitution effect at Co element in YbCo2Zn20

Riki Kobayashi

University of the
Ryukyus京都大学

大学院情報学研
Parallelization of a tensor network variational method
究科

Kenji Harada

Kyoto University

剛

京都大学

大学院工学研究High pressure synthesis of iron based MAX phase compounds
科

Takeshi Waki

Kyoto University

佳比古

名古屋大学

大学院工学研究High pressure effect on itinerant electron magnets
科

Yoshihiko Okamoto

Nagoya University

洋

京都大学

大学院工学研究
Pressure indured structural transition in BaTi2(Sb1-xBix)2O科

Hiroshi Kageyama

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

直輝

152 テンソルネットワーク変分法の並列化
担当所員：廣井Title

善二

新規超伝導体 BaTi2(Sb1-xBix)2O における圧力誘陰山
起構造相転移

156

〃

山本

隆文

京都大学

大学院工学研究
科〃

Takafumi Yamamoto Kyoto University

157

〃

セドリック
タッセル

京都大学

白眉センター〃Cedric Tassel

Kyoto University

周

東京大学

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

Shu Yamaguchi

The University of
Tokyo

158

超高圧プレスを用いた新規プロトニクス酸化物の山口
ソフト化学的合成法の検討

159

〃

三好

正悟

東京大学

大学院工学系研
究科〃

Shogo Miyoshi

The University of
Tokyo

160

〃

田中

和彦

東京大学

大学院工学系研
究科〃

Kazuhiko Tanaka

The University of
Tokyo

161

〃

本多

慶一郎

東京大学

工学部

〃

Keiichiro Honda

The University of
Tokyo

山口

周

東京大学

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

Shu Yamaguchi

The University ofTokyo

162 溶融亜鉛メッキ合金相の応力誘起変態

No.

課題名

氏名

所属

163

〃

三好

正悟

東京大学

164

〃

田中

和彦

165

窒素を含む芳香族化合物の高圧下における安定性
篠崎
と重合反応

166
167

Title

Name

Organization

大学院工学系研
究科〃

Shogo Miyoshi

The University of
Tokyo

東京大学

大学院工学系研
究科〃

Kazuhiko Tanaka

The University of
Tokyo

彩子

東京大学

大学院理学系研 Influence of nitrogen on the stability of aromatic compounds
under high pressure condition.
究科

Ayako Shiozaki

The University ofTokyo

Fe-MgSiO3-H2 系の高温高圧下におけるふるまい
飯塚
の解明

理子

愛媛大学

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

Riko Iizuka

Ehime University

アルカリ土類金属元素を含む充填スクッテルダイ
関根ト超伝導体の高圧合成

ちひろ

室蘭工業大学

大学院工学研究 High-pressure synthesis of alkaline earth metal based filledskutterudite superconductors
科

Chihiro Sekine

Muroran Institute ofTechnology

勇人

室蘭工業大学

大学院工学研究
科

Hayato Mikage

Muroran Institute ofTechnology

東京大学

大学院理学系研
Reactivity of nitrogen with minerals at lower-mantle conditions Hiroyuki Kagi
究科

The University of
Tokyo

ISSP Activity Report 2015

168

〃

三影

169

下部マントルの高温高圧条件におけるマントル鉱
鍵
物と窒素との反応性の探索

170

〃

篠崎

彩子

東京大学

大学院理学系研
究科〃

Ayako Shiozaki

The University of
Tokyo

171

〃

久保

俊智

東京大学

大学院理学系研
究科〃

Kubo Toshinori

The University of
Tokyo

172

高圧下におけるアミノ酸のラセミ化ならびにペプ
鍵
チド化の観察東京大学

大学院理学系研 Racemization and peptide formation of amino acids under highHiroyuki Kagi
pressure
究科

The University of
Tokyo

173

〃

Chikako Fujimoto

The University ofTokyo

Kenichi Takarabe

Okayama University of
ScienceNozomu Yasui

Okayama University of
Science

裕之

裕之

〃

79

藤本

千賀子

東京大学

大学院理学系研
究科

174 新規な窒化炭素の高圧高温合成

財部健一

岡山理科大学

理学部

175

〃

安井

望

岡山理科大学

大学院理学研究科

176

3d 遷移金属多窒化物の高圧合成とラマン散乱測
定

丹羽

健

名古屋大学

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

Ken Niwa

Nagoya University

177

〃

寺部

俊紀

名古屋大学

大学院工学研究科

Toshiki Terabe

Nagoya University

178 遷移金属二硫化物の高圧合成

丹羽

健

名古屋大学

大学院工学研究High pressure synthesis of transition metal disulfide科

Ken Niwa

Nagoya University

179

秋田

貴弘

名古屋大学

大学院工学研究
科

Takahiro Akita

Nagoya University〃〃
Synthesis of new carbon nitride at high pressure and hightemperature
〃

〃

〃

80

No.
180

課題名

氏名

ISSP Activity Report 2015

新規サイト秩序型ペロブスカイト複酸化物の高圧
志村
高温合成

所属

Title

Name

Organization

元

名古屋大学

大学院工学研究High pressure synthesis of novel site ordered perovskites
科

Gen Shimura

Nagoya University

181 Al 陰イオンを含むメタロイド合金の超高圧合成

白子

雄一

名古屋大学

大学院工学研究
High-pressure synthesis of metaloid alloy with Al anion
科

Yuichi Shirako

Nagoya University

182

齋藤

雄太

名古屋大学

大学院工学研究
科

Yuta Saito

Nagoya University

正

名古屋大学

大学院工学研究 High pressure synthesis of noble gas compounds andcharacterization by Raman scattering measurements
科

Masashi Hasegawa

Nagoya University

郁弥

名古屋大学

大学院工学研究科

Fumiya Matsuzaki

Nagoya University

正

名古屋大学

大学院工学研究 High pressure synthesis of novel open structured transition
metal oxides and fluorides科

Masashi Hasegawa

Nagoya University

廣瀬

瑛一

名古屋大学

大学院工学研究科

Eiichi Hirose

Nagoya University

187

超高圧高温処理による水の光分解触媒物質の高品
山田
位化の研究

太郎

東京大学

大学院工学系研 Improvement of photocatalytic materials for water splitting by
Taro Yamada
means of ultrahigh-pressure and high-temperature treatment
究科

The University of
Tokyo

188

超高圧高温処理による水の光分解触媒物質の高品
守屋
位化の研究

映祐

東京大学

大学院工学系研 Improvement of photocatalytic materials for water splitting by
Yosuke Moriya
means of ultrahigh-pressure and high-temperature treatment
究科

The University of
Tokyo

後藤

陽介

東京大学

大学院工学系研
究科

Yosuke Goto

The University of
Tokyo

190

非磁性不純物による三角スピンチューブのスピン
真中ダイナミクスの変化

浩貴

鹿児島大学

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

Hirotaka Manaka

Kagoshima University

191

高エネルギー X 線ラウエ法によるヘリカル磁性合山崎
金 (Gd-Y,Gd-La, Tb-Y, Dy-Y) の単結晶試料評価

照夫

東京理科大学

理工学部

Evaluation of the single crystals of the helical magnetic alloys(Gd-Y,Gd-La, Tb-Y, Dy-Y) by high-energy X-ray Laue method

Teruo Yamazaki

Tokyo University of
Science舞東京理科大学

大学院理工学研
究科〃

Mai Kurihara

Tokyo University of
Science

伸行

東京大学

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

The University of
Tokyo

慧介

東京大学

大学院新領域創成科学研究科

Keisuke Matsuura

The University of
Tokyo

183

〃

希ガス化合物の高圧合成とラマン散乱測定による
長谷川
評価

184
185

〃

格子内に空隙を持つ遷移金属酸化物およびフッ化
長谷川
物の高圧合成

186

〃

189

〃

担当所員：益田

192
193
194

松崎

〃

〃

〃

〃

隆嗣

〃

栗原

スピネル型バナジウム酸化物における磁気励起の
阿部
観測
〃

松浦

〃

No.

課題名

担当所員：吉澤

氏名

所属

Title

Name

Organization

英樹

195

ルテニウム酸化物における不均一磁性と遍歴 4d
電子の相関

横山

淳

茨城大学

理学部

Interplay between heterogeneous magnetism and itinerant 4delectrons in ruthenium oxides

196

〃

大高

凌

茨城大学

理学部

〃

197 希土類合金 Gd1-xLax の比熱測定

矢口宏

東京理科大学

理工学部

198

〃

山崎

照夫

東京理科大学

199

〃

栗原

舞
照夫

Makoto Yokoyama

Ibaraki University

Ryo Otaka

Ibaraki University

Specific heat measurements for the rare-earth magnetic alloy
Gd1-xLax.

Hiroshi Yaguchi

Tokyo University of
Science

理工学部〃

Teruo Yamazaki

Tokyo University of
Science

東京理科大学

大学院理工学研
究科〃

Mai Kurihara

Tokyo University of
Science

東京理科大学理工学部

聡

東京理科大学

大学院理工学研
究科

単一鎖長ポリオキシエチレン−ポリオキシプロピ
202 レン系非イオン性界面活性剤のレオロジーに関す 吉村
る研究倫一

奈良女子大学

Study on rheology of homogeneous polyoxyethyleneNara Women’ s
研究院自然科学polyoxypropylene-type nonionic surfactants without molecular Tomokazu Yoshimura
University
系
weight distribution

203

詩歩

奈良女子大学

大学院人間文化
研究科

淳

茨城大学

理学部

益子

寛明

茨城大学

理学部

単結晶 La1-xSrxCoO3 と LaCo1-xRhxO3 の強磁場佐藤
誘起スピン転移桂輔

茨城工業高等専
門学校

200

鉄系超伝導体 FeTe1-xSx の純良単結晶における Te
山崎
雰囲気中アニール効果

201〃

担当所員：柴山

ISSP Activity Report 2015

204
205
206

〃

Satoshi Kubota

Tokyo University of
ScienceTokyo University of
Science充弘〃

担当所員：金道久保田

Effect of Te-annealing in the Fe-based superconducter FeTe1-xSx Teruo Yamazaki

矢田〃Shiho Yada

Nara Women’ s
University

Makoto Yokoyama

Ibaraki University

Hiroaki Mashiko

Ibaraki University

Keisuke Sato

Ibaraki University

浩一

重い電子系化合物が示す非従来型超伝導と磁性の横山
相関〃207 希土類金属間化合物の強磁場物性研究

海老原

81

208 幾何学的フラストレート磁性体の強磁場磁化測定 菊池孝雄
彦光Interplay between unconventional superconductivity andmagnetism in heavy-fermion compounds〃
Field induced spin-state transition in La1-xSrxCoO3 andLaCo1-xRhxO3

静岡大学

大学院理学研究 Physical properties in rare earth intermetallic compounds athigh magnetic fields
科

Takao Ebihara

Shizuoka University

福井大学

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

Hikomitsu Kikuchi

University of Fukui

82

No.

課題名

209

〃

ISSP Activity Report 2015

210
211
212

氏名

所属

Title

Name

Organization〃

Kenji Kunieda

University of Fukui

国枝

賢治

福井大学

大学院工学研究科

チタン三角クラスターにおけるフラストレーショ浅野
ンと強磁場物性貴行

福井大学

大学院工学研究 Frustration and magnetic properties under high-magnetic fields
Takayuki Asanoin titanium triangular clusters
科

University of Fukui

福井大学

工学部

Yuta Hifumi

University of Fukui

浩明

京都大学

大学院理学研究 magnetism of single crystals of transition metal fluorides withtriangular lattice or kagome lattice科

Hiroaki Ueda

Kyoto University〃

一二三三角格子またはカゴメ格子をもつ遷移金属フッ化
植田
物単結晶の磁性

優汰

〃

213

〃

後藤

真人

京都大学

大学院理学研究科〃

Masato Goto

Kyoto University

214

〃

篠原

翔

京都大学

理学部

〃

Sho Shinohara

Kyoto University

千城

京都大学

大学院理学研究 High field magnetization of SrCo2P2, its family compounds andChishiro Michioka
other layered itinerant electron magnets
科

Kyoto University

215

SrCo2P2 の周辺物質を中心とした層状遍歴電子磁
道岡性体の強磁場磁化過程

216

〃

今井

正樹

京都大学

大学院理学研究科〃

Masaki Imai

Kyoto University

217

〃

原口

祐哉

京都大学

大学院理学研究
科〃

Yuya Haraguchi

Kyoto University

218

〃

勝間

勇人

京都大学

理学部

〃

Hayato Katsuma

Kyoto University

デラフォサイト型フラストレート磁性体の強磁場
佐藤
磁化

博彦

中央大学

理工学部

池戸

優太

中央大学

大学院理工学研
究科

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

政幸

大阪大学

219
220
221

〃

High-field magnetization of delafossite-type frustrated magnets Hirohiko Sato〃

Chuo University

Yuta Ikedo

Chuo University

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

Masayuki Hagiwara

Osaka University

222

〃

谷口

一也

大阪大学

大学院理学研究科〃

Kazuya Taniguchi

Osaka University

223

〃

佐藤

和樹

大阪大学

理学部

〃

Kazuki Sato

Osaka University

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

文俊

茨城大学

理学部

Fumitoshi Iga

Ibaraki University

徹

茨城大学

大学院理工学研
究科

Toru Wada

Ibaraki University

224
225

〃

和田

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

〃

No.

課題名

氏名

所属

Title

Name

Organization

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

Fumitoshi Iga

Ibaraki University〃

Eiji Kawawa

Ibaraki University

Mitsuru Inada

Kansai University

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

伊賀

文俊

茨城大学

理学部

227

〃

川和

英司

茨城大学

大学院理工学研
究科

228 金属ナノ結晶の磁化特性

稲田

貢

関西大学

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

229 高ドープ Bi-2212 のパルス強磁場下輸送特性

渡辺

孝夫

弘前大学

大学院理工学研 Transport properties in heavily overdoped Bi-2212 under highTakao Watanabe
pulsed magnetic fields
究科

Hirosaki University

230

〃

臼井

友洋

弘前大学

大学院理工学研
究科〃

Tomohiro Usui

Hirosaki University

231

〃

寺本

祐基

弘前大学

大学院理工学研
究科〃

Yuki Teramoto

Hirosaki University

有機／無機スピン源を有する新規量子スピン系の小野
強磁場磁化と磁場中比熱俊雄

大阪府立大学

大学院理学系研 High field magnetization and the heat capacity on the newquantum spin systems with organic/inorganic spin sources
究科

Toshio Ono

Osaka Prefecture
University

232

ISSP Activity Report 2015

233

〃

井川

直哉

大阪府立大学

大学院理学系研
究科〃

Naoya Ikawa

Osaka Prefecture
University

234

〃

笠谷

和宏

大阪府立大学

大学院理学系研
究科〃

Kazuhiro Kasatani

Osaka Prefecture
University

235

〃

遠藤

耀司

大阪府立大学

大学院理学系研
究科〃

Youji Endo

Osaka Prefecture
University

236 Ni2-xMnGa の強磁場下における磁歪測定

伊藤

昌和

鹿児島大学

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

Masakazu Ito

Kagoshima University

237

桑原

脩人

鹿児島大学

大学院理工学研
究科

Syuto Kuwahara

Kagoshima University

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

伊賀

文俊

茨城大学

理学部

239

小山内

茨城大学

大学院理工学研
究科〃担当所員：松田康弘〃

湧人

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

Ibaraki University

Yuto Osanai

Ibaraki University

Tatsuo Kobayashi

Okayama University

小林

達生

岡山大学

大学院自然科学
Field-induced phase transition in O2-N2 mixed solid
研究科

メタホウ酸銅における強磁場下の非相反方向二色
有馬
性

孝尚

東京大学

大学院新領域創 Nonreciprocal directional dichroism in magnetic ferroelectrics
Arima Takahisa
in a high magnetic field
成科学研究科

240 酸素−窒素混合固体における磁場誘起相転移

83

241

〃

The University of
Tokyo

84
ISSP Activity Report 2015

No.

課題名

242

〃

阿部

伸行

東京大学

243

〃

豊田

新悟

244

〃

根津

245 強磁場による強相関電子系準結晶の研究
246

担当所員：徳永

氏名

所属

Title

Name

Organization

大学院新領域創成科学研究科〃Nobuyuki Abe

The University of
Tokyo

東京大学

大学院新領域創成科学研究科〃

Shingo Toyoda

The University of
Tokyo

正謙

東京大学

大学院新領域創成科学研究科〃

Netsu Naoaki

The University of
Tokyo

出口

和彦

名古屋大学

大学院理学研究 Low temperature study of strongly correlated electron
quasicrystal
科

Kazuhiko Deguchi

Nagoya University

松川

周矢

名古屋大学

大学院理学研究科

shuya matsukawa

Nagoya University

将史

〃

〃

247

ブリージングパイロクロア格子反強磁性体の強磁
岡本
場磁化過程

佳比古

名古屋大学

大学院工学研究 High field magnetization measurements of Breathing pyrochlore
Yoshihiko Okamoto
lattice antiferromagnets
科248

遍歴電子強磁性と局在磁気モーメントが共存する
太田
系の磁化過程寛人

東京農工大学

大学院工学府敦

東京農工大学

工学部浩子

東京農工大学

勝哉

249
250
251

〃

鈴木

フラストレーションを有する磁性体の強磁場磁化
香取
過程
〃

磯崎

Nagoya University

Hiroto Ohta

Tokyo Universityof Agriculture andTechnology

Atsushi Suzuki

Tokyo Universityof Agriculture andTechnology

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

Hiroko Katori

Tokyo Universityof Agriculture andTechnology

東京農工大学

工学部〃

Isozaki Katsuya

Tokyo Universityof Agriculture andTechnology

Magnetic behavior of systems with itinerant ferromagnetismand localized magnetic moments〃

252

非破壊パルスマグネットを用いた磁場誘起密度波
矢口
多重相におけるグラファイトの輸送測定

宏

東京理科大学

理工学部

Transport measurements of graphite in the magnetic-field
induced multiple density-wave phase using a non-destructive
pulsed magnet

Hiroshi Yaguchi

Tokyo University of
Science253

U(Rh1-xCox)Ge の強磁場下におけるメタ磁性に関
本多
する研究

史憲

東北大学

金属材料研究所

Study of metamagnetism on U(Rh1-xCox)Ge under highmagnetic field

Fuminori Honda

Tohoku University

254

〃

青木

大

東北大学

金属材料研究所〃

Dai Aoki

Tohoku University

255

〃

志村

康成

東北大学

大学院工学研究
科〃

Yasunari Shimura

Tohoku University

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

東北大学

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

Tohoku University

257 一次元反強磁性体 BaCo2Si2O7 の強磁場磁化過程 赤木

暢

大阪大学

大学院理学研究 High magnetic field magnetization process of 1D
antiferromagnet BaCo2Si2O7
科

Osaka University

Mitsuru Akaki

No.

課題名

258 単体元素半導体 Te の強磁場中の磁気抵抗測定
259

氏名
小林

夏野

Pr1-xSrx(Mn1-yFey)O3 の反強磁性と熱電特性に関
中津川
する研究

260 新規カイラル量子磁性体の強磁場磁化測定
担当所員：嶽山

博

所属

Title

Name

Magnetoresistance in pulsed magnetic field on semiconducting
Kaya Kobayashi
tellurium

Organization

岡山大学

理学部

横浜国立大学

大学院工学研究 Antiferromagnetism and thermoelectric properties inPr1-xSrx(Mn1-yFey)O3
院

Hiroshi Nakatsugawa

Yokohama National
University

Kenta Kimura

Osaka University

Magneto-optical properties of the frustrated magnets containing
Hirohiko Satoa kagome-honeycomb-triangular composite lattice

Chuo University

木村

健太

大阪大学

大学院基礎工学 High-field magnetization measurements of a new chiralquantum magnet
研究科

Okayama University

正二郎

261

カゴメ−ハニカム−三角複合格子を持つフラスト
レート磁性体の磁気光学特性

佐藤

博彦

中央大学

理工学部

262

〃

大塚

大祐

中央大学

大学院理工学研
究科

マルチフェロイック三角格子反強磁性体 AgFeO2
佐藤の強磁場磁気光学特性

博彦

中央大学

理工学部

池戸

優太

中央大学

大学院理工学研究科

微小共振器構造を組み合わせた窒素デルタドープ
矢口GaAs からの発光特性評価

裕之

埼玉大学

大学院理工学研 Characterization of luminescence properties of nitrogen deltaHiroyuki Yaguchi
doped GaAs with a micro-cavity structure
究科

Saitama University

263
264

〃

担当所員：秋山265〃
Magneto-optical properties of multiferroic triangular-lattice
antiferromagnet AgFeO2 under high magnetic fields〃

Daisuke Otsuka

Chuo University

Hirohiko Sato

Chuo University

Yuta Ikedo

Chuo University

英文ISSP Activity Report 2015

266

〃

高宮

健吾

埼玉大学

総合技術支援センター〃

Kengo Takamiya

Saitama University

267

〃

須藤

真樹

埼玉大学

大学院理工学研
究科〃

Masaki Sutou

Saitama University

担当所員：辛埴268

トポロジカル絶縁体 / 磁性絶縁超薄膜体のヘテロ平原
接合の界面原子構造解析

徹

東京工業大学

大学院理工学研 Interface structure analysis of a topological/magnetic insulator
Toru Hirahara
thin film heterostructure
究科Tokyo Institute ofTechnology269

極低温超高分解能レーザー光電子分光装置による鈴木
超伝導ギャップ測定

博人

東京大学

大学院理学系研 Superconducting gap measurement by low-temperature highresolution laser angle-resolved pho-toemision spectroscopy
究科

Hakuto Suzuki

The University of
Tokyo

眞史

東京大学

大学院理学系研
究科

Masafumi Horio

The University of
Tokyo

東京大学

工学部

Takahiro Shimojima

The University of
Tokyo

270

〃

85

271 鉄系超伝導体の時間分解角度分解光電子分光

堀尾
下志万

貴博

〃
Time-resolved and angle-resolved photoemission study on theiron-based superconeductors

86

No.

課題名

272

〃

氏名

所属

ISSP Activity Report 2015

中村

飛鳥

東京大学

大学院工学系研
究科273

角度分解光電子分光による鉄系超伝導体における園部
擬ギャップの研究

竜也

東京大学

274

強いスピン相互作用を有するビスマス化合物にお坂野
ける超伝導状態の直接観測

昌人

275

時間分解光電子分光による新規半導体の励起状態
石坂の観測

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

Tatsuya Sonobe

The University of
Tokyo

東京大学

大学院工学系研 Direct observation of superconducting state in bismuth
compound with strong spin-orbit coupling
究科

Masato Sakano

The University of
Tokyo

香子

東京大学

大学院工学系研 Excited state of semiconductors investigated by time-resolved
photoemission spectroscopy
究科

Kyoko Ishizaka

The University of
Tokyo

鈴木

裕也

東京大学

大学院工学系研
究科

Yuya Suzuki

The University ofTokyo

トポロジカル絶縁体表面ディラック電子のスピン木村
依存緩和ダイナミクス

昭夫

広島大学

大学院理学研究 Spin-dependent nonequilibrium dynamics of surface DiracFermions in topological insulators
科

Akio Kimura

The University of
Tokyo

広島大学

大学院理学研究 Nonequilibrium dynamics in ferromagnetic topologicalinsulators
科

Zhu Siyuan

The University of
Tokyo

香子

東京大学

大学院工学系研 Observation of spin polarization in inversion-symmetry broken
Kyoko Ishizaka
materials
究科

The University of
Tokyo

慎一

東京大学

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

Shinichi Ohkoshi

The University of
Tokyo

〃

思源

空間反転対称性の破れた物質におけるスピン分極
石坂の観測

担当所員：末元280

Organization
The University ofTokyo

278 強磁性トポロジカル絶縁体の非平衡ダイナミクス 朱
279

Name
Asuka Nakamura

276
277

Title

〃

〃

徹

テラヘルツ分光装置を用いた酸化物磁性材料の研
大越
究

281

〃

生井

飛鳥

東京大学

大学院理学系研
究科〃

Namai Asuka

The University of
Tokyo

282

〃

吉清

まりえ

東京大学

大学院理学系研
究科〃

Marie Yoshikiy

The University ofTokyo

283 電波天文観測用超伝導素子のテラヘルツ分光計測 山本

智

東京大学

大学院理学系研 THz spectroscopy of a superconducting detector for radioastronomical observations
究科

Satoshi Yamamoto

The University of
Tokyo

284

〃

浅原

彰文

東京大学

大学院理学系研
究科〃

Akifumi Asahara

The University of
Tokyo

285

〃

西村

優里

東京大学

大学院理学系研
究科〃

Yuri Nishimura

The University of
Tokyo

No.

課題名

氏名

所属

Title

Name

Organization

Title

Name

Organization

物質合成・評価設備 P クラス / Materials Synthesis and Characterization P Class Researcher
No.
1
2
3
4

課題名

氏名

遷移金属酸窒化物、酸水素化物における構造物性
山浦
研究
〃

真木

電子が複合自由度を持つ遷移金属系物質の純良単片山
結晶育成と物性評価
〃

菅原

所属

淳一

東京工業大学

元素戦略研究セ Study of structural physics on transition metal oxynitrides andJunichi Yamaura
oxyhydrides
ンターTokyo Institute ofTechnology

祥千子

東京工業大学

元素戦略研究センター

Sachiko Maki

Tokyo institute oftechnology

尚幸

名古屋大学

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

Naoyuki Katayama

Nagoya University

健人

名古屋大学

大学院工学研究科

Kento Sugawara

Nagoya University〃〃

物質合成・評価設備 G クラス / Materials Synthesis and Characterization G Class Researcher
No.
1
2
3

ISSP Activity Report 2015

4
5
6
7
8
9

87

10

課題名

氏名

超臨界水を利用したドライ画像フィルムの分解と大友
銀化合物のリサイクル〃

升川

固体酸・塩基触媒を利用した高温高圧水を反応場
大友とした多段階有機合成反応
〃

〃

秋月

中温作動燃料電池における電極及び電解質の材料
大友
設計
〃

小城

固体酸化物形燃料電池の電極 / 電解質界面におけ大友るカチオン拡散現象評価
〃

橋北

Title

Name

Organization

順一郎

東京大学

大学院新領域創 Decomposing dry imaging film and recycling silver compounds
Junichiro Otomo
using supercritical water
成科学研究科The University of
Tokyo

駿

東京大学

工学部

Masukawa Shun

The University of
Tokyo

順一郎

東京大学

大学院新領域創 multi-step organic synthesis in sub- and supercritical waterusing solid acid/base catalysts
成科学研究科

Junichiro Otomo

The University of
Tokyo

東京大学

大学院新領域創成科学研究科yusuke nakai

The University of
Tokyo

順一郎

東京大学

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

Junichiro Otomo

The University of
Tokyo

信

東京大学

大学院新領域創成科学研究科

Makoto Akizuki

The University of
Tokyo

順一郎

東京大学

大学院新領域創 Material design of electrode and electrolyte for intermediate
temperature
成科学研究科

Junichiro Otomo

The University of
Tokyo

元

東京大学

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

順一郎

東京大学

大学院新領域創 Evaluation of cation diffusion in the electrode/electrolyte
interface of solid oxide fuel cell
成科学研究科

Junichiro Otomo

The University of
Tokyo

直人

東京大学

大学院新領域創成科学研究科

Naoto Hashikita

The University of
Tokyo

中井 佑輔

高温高圧水中における固体酸・塩基触媒反応の速
大友
度論的解析

所属

〃

〃

〃

〃

〃

88

No.
11

ISSP Activity Report 2015

12
13
14
15
16
17

課題名

氏名

プロトン電導性電解質を用いた再生型燃料電池に
大友
おける電極反応評価〃

Name

Organization

大学院新領域創 Investigation of electrode reaction in reversivle fuel cells with
proton conducting electrolyte
成科学研究科

Junichiro Otomo

The University of
Tokyo

修平

東京大学

工学部

Mastuoka Shuhei

The University of
Tokyo

順一郎

東京大学

大学院新領域創 Study on catalyst synthesis and surface reaction analysis fornovel energy storage systems
成科学研究科

Junichiro Otomo

The University of
Tokyo

文彦

東京大学

大学院新領域創成科学研究科

Fumihiko Kosaka

The University of
Tokyo

順一郎

東京大学

大学院新領域創 Preparation of perovskite oxides as supports for MeO (Me: Cu,
Junichiro OtomoNi) oxygen carrier materials for chemical looping systems
成科学研究科The University of
Tokyo

東京大学

大学院新領域創成科学研究科

Ochieng James
Ochieng

The University of
Tokyo

東京大学

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

Takehiko Sasaki

The University of
Tokyo

松岡

東京大学

高坂

ぺロブスカイト型酸化物を用いたケミカルルーピ
大友
ングシステムの開発
〃

Title

順一郎

新規エネルギー貯蔵システムの触媒開発と表面反
大友
応解析
〃

所属

オーチェン
ジェームズ
オーチェン

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

岳彦

〃

〃

〃

18 高圧合成法による新規 5d 遷移金属化合物の探索 有馬

孝尚

東京大学

大学院新領域創 Exploration of new 5d transition metal compounds by means of
Takahisa Arima
high-pressure synthesis
成科学研究科The University of
Tokyo

19

〃

阿部

伸行

東京大学

大学院新領域創成科学研究科〃Nobuyuki Abe

The University of
Tokyo

20

〃

豊田

新悟

東京大学

大学院新領域創成科学研究科〃

Shingo Toyoda

The University of
Tokyo

21

〃

根津

正謙

東京大学

大学院新領域創成科学研究科〃

Netsu Naoaki

The University of
Tokyo

22

〃

鷲見

浩樹

東京大学

大学院新領域創成科学研究科〃

Hiroki Sumi

The University of
Tokyo

順一郎

東京大学

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

Junichiro Otomo

The University of
Tokyo

東京大学

大学院新領域創成科学研究科

Akira Yoko

The University of
Tokyo

東京大学

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

東京大学

大学院新領域創成科学研究科Lei Yue

The University of
Tokyo

東京大学

大学院新領域創 The preparation of core-shell particles under supercriticalhydrothermal synthesis
成科学研究科

Junichiro Otomo

The University of
Tokyo

23

超臨界水熱合成による酸化物コンポジットナノ粒
大友子の合成手法の開発

24

〃

横

25

高温高圧水を利用した微粒子の in situ 有機修飾
技術の開発

大友

26

〃

岳

27

哲
順一郎

超臨界水熱合成によるコアシェル型微粒子の合成
大友
手法の開発

磊
順一郎

〃

〃

No.

課題名

28

〃

氏名
李

夢婷

所属
東京大学

大学院新領域創成科学研究科

Title

〃

Name

Organization

Li Mengting

The University ofTokyo

29 複合酸化物ナノ粒子の超臨界水熱合成手法の検討 大友

順一郎

東京大学

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

Junichiro Otomo

The University of
Tokyo

30

進介

東京大学

大学院新領域創成科学研究科

Shinsuke KatoThe University of
Tokyo

岳彦

東京大学

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

Takehiko Sasaki

The University of
Tokyo

健太郎

東京大学

大学院新領域創成科学研究科

Itako kentaro

The University ofTokyo

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

Sue Kiwamu

AIST

Eiji Hosono

AIST

Itoi Miho

Nihon University〃

加藤

31 触媒反応の insitu ラマン散乱測定

佐々木

32

〃

板子

33

マイクロミキサを用いた機能性酸化物ナノ粒子の
陶
連続合成

〃

細野

英司

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

透過型電子顕微鏡による機能性金属錯体の歪み測
糸井
定

充穂

日本大学

医学部

Distortion measurement for multi-finctional metal complex bytransmission electron microscope

Microstructural studies of newly developed permanent magnet
Tetsuji Saito
materials

34 ナノ材料を用いた二次電池開発
35

究

〃

Chiba Institute ofTechnology

ISSP Activity Report 201589

36 新規磁石材料の微細構造解析

齋藤哲治

千葉工業大学工学部

37 梯子型鉄系化合物の元素置換効果

大串

研也

東北大学

大学院理学研究
Substitution effect on Fe-based ladder compounds
科

Kenya Ohgushi

Tohoku University

38 スピネル・パイロクロア酸化物の磁気的性質

岡本

佳比古

名古屋大学

大学院工学研究
Magnetic properties of spinel and pyrochlore oxides
科

Yoshihiko Okamoto

Nagoya University

出

鹿児島大学

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

Kagoshima University

重松

理史

鹿児島大学

大学院理工学研
究科

Satoshi Shigematsu

Kagoshima University

41 ホイスラー型化合物の磁性と伝導の研究

廣井

政彦

鹿児島大学

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

Masahiko Hiroi

Kagoshima University

42

〃

田底

知也

鹿児島大学

大学院理工学研
究科

Tomoya Tazoko

Kagoshima University

43

ペロブスカイト酸化物 PbVO3 の高圧下電気輸送
岡
特性の測定

中央大学

理工学部

Kengo Oka

Chuo University

名古屋大学

大学院工学研究
Properties of novel site ordered perovskite oxides
科

Gen Shimura

Nagoya University

39
40

ハーフメタル型ホイスラー合金の磁性と輸送特性
重田に関する研究〃44 新規サイト秩序型ペロブスカイト複酸化物の物性 志村

研吾
元

〃

〃
Investigation of the electronic transport of perovskite PbVO3
under high-pressure

90

No.

課題名

氏名

所属

Title

Name

Organization

ISSP Activity Report 2015

隆一

山口大学

大学院理工学研
Growth of a new ferroelectric phase, K5Nb9O25 single crystal
究科

真帆人

横浜国立大学

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

Yokohama National
University

横浜国立大学

大学院工学府〃Kim Junseop

Yokohama National
University

響

横浜国立大学

大学院工学府〃

Hibiki Sakakura

Yokohama National
University

49 高圧合成法による新規 5d 遷移金属化合物の探索 徳永

祐介

東京大学

大学院新領域創 Exploration of new 5d transition metal compounds by means ofYusuke Tokunaga
high-pressure synthesis
成科学研究科The University of
Tokyo

50

〃

藤間

友理

東京大学

大学院新領域創成科学研究科〃Yuri Fujimiya

The University of
Tokyo

51

〃

前島

夏奈

東京大学

大学院新領域創成科学研究科〃

Kana Maeshima

The University ofTokyo

45 新強誘電体 K5Nb9O25 単結晶の育成
46

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

47

〃

金

48

〃

坂倉

俊燮

Ryuichi Komatsu

Yamaguchi University

物質合成・評価設備 U クラス / Materials Synthesis and Characterization U Class Researcher
No.
1
2
3
4

課題名

氏名

アルミ系近似結晶中の正 20 面体クラスターの金金沢
属結合−共有結合転換〃
正 20 面体クラスター固体の電気伝導と磁性
〃

育三

佐々木

友彰

所属
東京学芸大学

教育学部

東京学芸大学

大学院教育学研
究科

Title

Name

Metallic-covalent bonding conversion of icosahedral cluster in
Ikuzo
Al-based approximant crystals〃

Kanazawa

Organization
Tokyo Gakugei
University

Tomoaki Sasaki

Tokyo Gakugei
University

木村

薫

東京大学

大学院新領域創 Electrical conductivity and magnetic properties of icosahedralcluster solids
成科学研究科

Kaoru Kimura

The University of
Tokyo

廣戸

孝信

東京大学

大学院新領域創成科学研究科〃Takanobu Hiroto

The University ofTokyo

Magnetoresistance on semiconducting Te in low magnetic eld

Kaya Kobayashi

Okayama University

5

単体元素半導体 Te の弱磁場磁気抵抗測定

小林

夏野

岡山大学

理学部

6

グラフェンのテラヘルツ光領域における光吸収ス
松木
ペクトルの制御孝憲

東京大学

大学院新領域創Control of graphene optical spectrum in terahertz region
成科学研究科Takanori Matsuki

The University of
Tokyo

7

ケミカルループ法における酸素キャリア材料の劣大友化挙動の観察順一郎

東京大学

大学院新領域創 Degradation of oxygen carrier materials in chemical loop
systems
成科学研究科

Junichiro Otomo

The University of
Tokyo

佑耶

東京大学

大学院新領域創成科学研究科Yuya Saito

The University of
Tokyo

8

〃

斉藤

〃

No.
9

課題名

氏名

超臨界流体中の表面バリア放電プラズマによるア
シュタウス
モルファスカーボンおよびダイヤモンドライクカ
スヴェン
ーボンのナノコーティング

所属
東京大学

Title

Name

Fabrication of amorphous and diamond-like carbon
大学院新領域創
nanocoatings by surface dielectric barrier discharges generated Sven Stauss
成科学研究科
in supercritical fluids

Organization
The University ofTokyo

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

課題名

氏名

所属

Title

Name

Organization1

超流動ヘリウム 3-A 相の半整数量子渦の研究木村豊

大阪市立大学

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

Kimura Yutaka

Osaka City University2

熱輸送測定によるスピン液体の研究

渡邊

大樹

京都大学

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

Daiki Watanabe

Kyoto university

3

多重極限物性測定装置の開発と量子臨界物性の研
山本
究

貴士

大阪大学

Development of experimental measuring equipments under
大学院理学研究
multiplex extreme conditions and studies on quantum critical科
phenomena

Kazuki Sato

Osaka University

4

窒素ドープ炭素材料の酸素還元反応メカニズムの
木内
解明

久雄

東京大学

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

Kiuchi Hisao

The University of
Tokyo

5

中性子回折実験用高圧セル装置の開発と、水素結飯塚合を持つ化合物の高温高圧下その場観察

理子

愛媛大学

地球深部ダイナ
Development of high-pressure cell for neutron diffractin and inRiko Iizuka
ミクス研究セン
situ observation of hydrogen-bonding materials
ター

Ehime University

ISSP Activity Report 2015

91

92

平成 27 年度

共同利用課題一覧（後期）Joint Research List (2015 Latter Term)

ISSP Activity Report 2015

嘱託研究員 / Commission Researcher）
No.

課題名

担当所員：中辻

氏名

所属

Title

Name

Organization

Hiroshi Sawa

Nagoya University

知1

X 線回析実験による非クラマース系におけるスピ澤
ンと軌道の複合自由度の研究

2

価数異常に伴う量子臨界スケーリングの研究

三宅和正

豊田理化学研究所

3

フラストレート磁性体における量子物性の探究

木村

健太

大阪大学

大学院基礎工学
The search for quantum state in frustrated magnets
研究科

Kenta Kimura

Osaka University4

極低温磁化装置の開発と磁気測定

柄木

良友

琉球大学

教育学部

Yoshitomo Karaki

University of the
Ryukyus5

価数揺動重い電子系イッテルビウム化合物におけ久我る価数クロスオーバーと格子定数変化

健太郎

理化学研究所

放射光科学総合 Investigation of quantum critical phenomena in valencefluctuating and heavy fermion Yb-based compound
研究センター

Kentarou Kuga

RIKEN

担当所員：吉信博

名古屋大学

大学院工学研究 X-ray diffraction study of spin-orbital coupled states of nonKramers systems
科

Theoretical study on charge critical fluctuations associated with
Kazumasa Miyake
valence instability

Development of low temperature magnetic measurements

Toyota Physical andChemical ResearchInstitute淳

6銅合金触媒における二酸化炭素の水素化・メタノ
森川ール合成に関する研究

良忠

大阪大学

大学院工学研究 Study on methanol synthesis by hydrogenation of carbon
dioxide over Cu alloy catalyst
科

Yoshitada Morikawa

Osaka University

7

生体物質のセンサー応用を目指した高分解能電子
米田
エネルギー損失分光を用いた振動分光研究

忠弘

東北大学

多元物質科学研 High resolution vibration spectroscopy of bio-molecules forsensor application
究所

Tadahiro Komeda

Tohoku University8

酸化物半導体光触媒における水分解反応の研究

吉泰

京都大学

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

Yoshiyasu Matsumoto Kyoto University

9

SiC 表面上に成長させたエピタキシャルグラフェ Md. Zakir
ンの化学修飾Hossain群馬大学

大学院理工学府

10

固体表面に吸着した有機分子の光学物性及び振動
桑原
状態の評価

裕司

大阪大学

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

山田

容子

奈良先端科学技 物質創成科学研
Control of mano-structure of organic thin-film solar cell
術大学院大学
究科

新見

康洋

大阪大学

11 有機薄膜太陽電池の薄膜構造制御
担当所員：大谷松本

Chemical modification of epitaxial graphene grown on SIC
substree[and its spectroscopic characterization

Md. Zakir Hossain

Gunma University

Yuji Kuwahara

Osaka University

Hiroko Yamada

Nara Instituteof Science andTechnology

義近

12 2 次元原子層を利用したスピン流回路の創製

大学院理学研究 Creation of spin current circuits using two-dimensional atomic
Yasuhiro Niimi
layers科

Osaka University

No.

課題名

氏名

3He-4He 希釈冷凍機と 14T 超伝導マグネットを
13 組み合わせた複合極限環境下における STM の開 河江
発

達也

九州大学

担当所員：長谷川

担当所員：上床

所属

Title

Name

Organization

Tastuya Kawae

Kyushu University

Osaka University of
Economics and Law

幸雄
大学院工学研究 Development of STM at very low-temperatures and strong
magnetic fields
院

美也

ISSP Activity Report 201593

14 有機伝導体の圧力効果

村田惠三

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

15 多重極限関連圧力装置の調整

高橋

博樹

日本大学

文理学部

Hiroki Takahashi

Nihon University

16 希土類化合物の単結晶試料評価とその圧力効果

藤原

哲也

山口大学

大学院理工学研
Effect of Pressure on the Ce Compounds
究科

Tetsuya Fujiwara

Yamaguchi University

17 希土類 122 化合物における圧力効果

繁岡

透

山口大学

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

Toru Shigeoka

Yamaguchi University

18 磁性体の圧力効果

巨海玄道

久留米工業大学

Gendo Oomi

Kurume Institute ofTechnology

19 圧力下 NMR 測定法に関する開発

藤原

直樹

京都大学

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

Naoki Fujiwara

Kyoto University

20 低温用マルチアンビル装置の開発

辺土

正人

琉球大学

理学部

Masato Hedo

University of the
Ryukyus21 中性子回析に用いる圧力装置の開発

片野

進

埼玉大学

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

Susumu Katano

Saitama University

22 擬一次元有機物質の圧力下物性研究

糸井

充穂

日本大学

医学部

Study on pressure induced superconductivity of quasi organic
conductor

Miho Itoi

Nihon University

23 高圧下の比熱測定装置の開発

梅原

出

横浜国立大学

工学部

Development of apparatus for specific heat measurements
under high pressure

Izuru Umehara

Yokohama National
University

24 磁化測定装置の開発

名嘉節

物質・材料研究機構

Development of the magnetometer

Takashi NakaNIMS

25 AgPdCu 合金圧力セルを用いた磁場中比熱測定

河江

達也

九州大学

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

Tastuya Kawae

Kyushu University

26 3d 遷移金属化合物の圧力下に関する圧力効果

鹿又武

東北学院大学

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

Takeshi Kanomata

Tohoku Gakuin
University

和幸

電気通信大学

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

KazuyukiMatsubayashi

The University
of ElectroCommunications

27

希釈冷凍機温度で使用可能な 10GPa 級超高圧発
松林生装置の開発Adjustment of cubic anvil apparatus

Effect of pressure on the magnetic materials

Development of multi-anvil apparatus for low temperature

Murata

94

No.

課題名

氏名

28 超低温度における重い電子系物質の量子振動測定 宍戸寛明

大阪府立大学

大学院工学研究 Quantum oscillation measurements of heavy-fermion materials
Hiroaki Shishido
at ultra-low temperatures
科

Osaka Prefecture
University

担当所員：山下

ISSP Activity Report 2015

担当所員：柴山

所属

Title

Name

Organization

穣

充弘

29

小型集束型小角散乱装置の高性能化及びそれによ
古坂
る応用研究

道弘

北海道大学

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

Michihiro Furusaka

Hokkaido University30

中性子散乱装置の共同利用・開発による強相関電岩佐子系物質の構造物性の研究

和晃

東北大学

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

Kazuaki Iwasa

Tohoku University

31

湾曲大型 2 次元中性子検出器と低温振動写真撮影
木村
装置の開発

宏之

東北大学

多元物質科学研 Development of Large-area curved two dimensional neutron
detector and low temperature oscillating photographic device
究所

Hiroyuki Kimura

Tohoku University32

中性子散乱装置のアップグレードと共同利用研究
藤田
の推進

全基

東北大学

金属材料研究所

Masaki Fujita

Tohoku University

33

中性子散乱装置のアップグレード後の研究計画の田畑
実施と共同利用の推進

吉計

京都大学

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

Yoshikazu Tabata

Kyoto University

大学院先端物質科学研究科

Takeshi Matsumura

Hiroshima University

Masato Matsuura

CROSS

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

34

〃

松村

武

広島大学

35

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

総合科学研究機 東海事業センタ Upgrade of 3-axis neutron spectrometer for the oncoming
coexistence of J-PARC/MLF and JRR-3
構ー

36

中性子分光器を用いた強相関電子系物質の微視的
桑原
研究

慶太郎

茨城大学

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

Ibaraki University

37

高度化した３軸分光器を用いた共同利用の推進と横山
物質科学研究の実施

淳

茨城大学

理学部

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

Ibaraki University

杉山

正明

京都大学

原子炉実験所

Development of micro-focusing small-angle neutron scattering
spectrometer

Kyoto University

39

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

正裕

京都大学

原子炉実験所

Development of compact focusing SANS instrument andMasahiro Hino
improvement of cold neutron reflectometer and interferometer40

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

雅暁

名古屋大学

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

Masaaki Kitaguchi

Nagoya University

41 流動場でのソフトマターの構造変化に関する研究 高橋

良彰

九州大学

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

Yoshiaki Takahashi

Kyushu University

三軸分光器を用いた極端条件下における物質科学
阿曽
研究の実施

尚文

琉球大学

理学部

Naofumi Aso

University of the
Ryukyus38 C1-3

42

ULS 極小角散乱装置 IRT〃

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

Masaaki Sugiyama

Kyoto University

No.
43

課題名

氏名

非イオン界面活性剤ベシクルにおける高圧下の 2
川端
分子膜の熱揺らぎ所属

庸平

首都大学東京Title

大学院理工学研
Bilayer undulation of a nonionic vesicle under high pressure
究科

Name

Organization

Youhei Kawabata

Tokyo Metropolitan
University

Shinichi Itoh

KEK

44 中性子散乱研究計画の実施と共同利用の推進伊藤晋一

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

45 冷中性子干渉イメージング装置開発研究大竹淑恵

理化学研究所

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

Yoshie Otake

RIKEN

Taku Sato

Tohoku University

Yusuke Nambu

Tohoku University

Kenta Fujii

Yamaguchi University46

三軸分光器の高度化およびそれを用いたスピンダ
佐藤
イナミクス研究卓

東北大学

多元物質科学研 Improvement of triple-axis spectrometer and its application to
the spin dynamics research
究所

47

高度化した三軸分光器を用いた強相関電子系物質
南部
の研究

雄亮

東北大学

金属材料研究所

48

小角中性子散乱による Li イオン電池用ゲル電解質の構造研究

藤井

健太

山口大学

大学院理工学研
SANS study on high-toughness ion gels for Li-ion batteries
究科（工学系）

井上

倫太郎

京都大学

原子炉実験所

Development of small-angl neutron scattering and spin echo
spectorometer

Rintaro Inoue

Kyoto University

康雄

東北大学

金属材料研究所

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

Yasuo Narumi

Tohoku University

49 C1-2

SANS-U 及び C2-3-1

担当所員：金道
50

iNSE 装置 IRT

Study of strongly correlated electron systems using advanced
triple-axis spectrometers浩一

強磁場量子ビーム科学のためのパルスマグネット
鳴海の開発

ISSP Activity Report 201595

51 85 テスラマグネットを用いた超音波測定の開発

吉澤

正人

岩手大学

大学院工学研究 Development for ultrasonic measurements by use of 85
T-magnet科

Masahito Yoshizawa

Iwate University

52

中西

良樹

岩手大学

大学院工学研究科

Yoshiki Nakanishi

Iwate University

藤森

淳

東京大学

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

Atsushi Fujimori

The University of
Tokyo

香子

東京大学

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

Kyoko Ishizaka

The University of
Tokyo

東京大学

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

Takahiro Shimojima

The University of
Tokyo

Tsunehiro Takeuchi

Toyota Technological
Institute

Takayoshi Yokoya

Okayama University〃

担当所員：辛埴

53 高温超伝導体の高分解能光電子分光
54〃60-eV レーザーを用いた時間分解光電子分光の開石坂
発

55 鉄系超伝導体のレーザー光電子分光

下志万

貴博

56 Bi 系超伝導体の角度分解光電子分光竹内恒博

豊田工業大学57 高分解能光電子分光による強相関物質の研究

横谷

尚睦

岡山大学

Angle-resolved photoemission study on high Tc cuprate

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

96

No.

課題名

氏名

所属

Title

Name

Organization

ISSP Activity Report 201558 酸化バナジウムの高分解能光電子分光

江口

律子

岡山大学

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

Ritsuko Eguchi

Okayama University

59 有機化合物の光電子分光

金井要

東京理科大学

理工学部

Kaname Kanai

Tokyo University of
Science60 重い電子系ウラン化合物の高分解能光電子分光

藤森伸一

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

Shinichi Fujimori

JAEA

61 レーザー光電子分光による酸化物薄膜の研究

津田俊輔

物質・材料研究機構

Laser-photoemission study on oxide films

Shunsuke Tsuda

NIMS

62 ４ｆ電子系物質の高分解能光電子分光

松波雅治

豊田工業大学

Photoemission study on 4f materials

Masaharu Matsunami

Toyota Technological
Institute

63 超高空間分解能光電子顕微鏡による磁区構造観察 中川

剛志

九州大学

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

Takeshi Nakagawa

Kyushu University

64 Mn 化合物の時間分解光電子分光

大川

万里生

東京理科大学

理学部

Time resolved photoemission on Mn compounds

Mario Okawa

Tokyo University of
Science

65 収差補正型光電子顕微鏡の建設と利用研究

小嗣真人

東京理科大学

基礎工学部

Construction and utilization research of aberration correction
photoelectron emission microscopy

Masato Kotsugi

Tokyo University of
Science

66 時間分解・マイクロビームラインの開発と研究室隆桂之

高輝度光科学研究センター

Development of micr- and time-resolved beamline

Takayuki Muro

JASRI

67

光電子分光法を用いた各種分子性結晶の電子状態
木須の研究及び装置の低温化

68 トポロジカル絶縁体の電子状態の解明
担当所員：松田木村

Photoemission study on organic compounds

孝幸

大阪大学

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

Takayuki Kisu

Osaka University

昭夫

広島大学

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

Akio Kimura

Hiroshima University

理工学部

巌

69

高輝度放射光軟 X 線を用いた時間分解光電子分光
近藤による表面ダイナミクス研究寛慶應義塾大学70

軟 X 線アンジュレータビームラインの分光光学系
雨宮
の開発研究

健太

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

奥田

太一

広島大学

72 光電子顕微鏡による磁性ナノ構造物質の磁化過程 木下豊彦

高輝度光科学研究センター

高輝度軟 X 線を利用した強相関物質の電子状態研
組頭
究

広志

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

71 光電子スピン検出器の開発・研究

73

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

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

Keio University

Kenta Amemiya

KEK

Taichi Okuda

Hiroshima University

Magnetization in process of magnetic nano structure by PEEM Toyohiko Kinoshita

JASRI

Hiroshi Kumigashira KEK

No.
74

課題名

氏名

二次元表示型スピン分解光電子エネルギー分析器
大門
の開発

所属

Title

Name

Organization

寛

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

Hiroshi Daimon

Nara Instituteof Science andTechnology

75 分子吸着系における時間分解光電子分光の研究

間瀬一彦

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

Kazuhiko Mase

KEK

76 共鳴磁気光学カー効果の散乱理論研究田口宗孝

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

Taguchi Munetaka

Nara Instituteof Science andTechnology

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

英司

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

Eiji Hosono

AIST

朝倉

大輔

産業技術総合研 エネルギー技術
究所
研究部門

Daisuke AsakuraAIST

79 高分解能光電子分光による酸化バナジウムの研究 藤原

秀紀

大阪大学

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

Hidenori Fujiwara

Osaka University

大阪大学

産業科学研究所

Suga Shigemasa

Osaka University

担当所員：原田
77

慈久

78

〃

〃

ISSP Activity Report 201580

軟 X 線発光・共鳴非弾性散乱分光の磁気円・線二菅
色性測定システムの構築

81

極小角Ｘ線散乱と軟Ｘ線吸収・発光分光によるソ
雨宮
フトマテリアルの物性研究

慶幸

東京大学

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

The University of
Tokyo

82

二次元原子薄膜トランジスタの電子状態のナノ分
吹留
析(Ⅰ)

博一

東北大学

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

Hirokazu Fukidome

Tohoku University

83 省エネ・創エネ・蓄電デバイスのオペランド分光 尾嶋

正治

東京大学

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

Masaharu Oshima

The University of
Tokyo

村上

洋一

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

Youichi Murakami

KEK

85

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

物質・材料研究機構

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

NIMS

86

共鳴軟Ｘ線散乱を用いた外場下での電子秩序状態
山崎
の解明

裕一

東京大学

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

大樹

84 共鳴硬・軟 X 線散乱による構造物性と磁性研究

大学院工学系研 Observation of electric ordered state under external field byresonant soft x-ray scattering
究科

Yuichi Yamasaki

The University of
Tokyo

97

No.

課題名

98

氏名

所属

Title

Name

Organization

氏名

所属

Title

Name

Organization

一般研究員 / General Researcher
No.

課題名

ISSP Activity Report 2015

担当所員：榊原1

俊郎

強相関電子系化合物の秩序相に対する結晶対称性
横山
および軌道縮退の効果

淳

茨城大学

理学部

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

Makoto Yokoyama

Ibaraki University

Yumi Sakon

Ibaraki University

Kazunari Machida

Ritsumeikan University

2

〃

佐近

優美

茨城大学

大学院理工学研究科

3

超伝導対称性決定のための実験的、理論的研究

町田

一成

立命館大学

理工学部

4

六方晶 Pr2Pt6Ga15 の極低温磁化・比熱測定

松本裕司

名古屋工業大学

大学院工学研究 Magnetization and specific heat measurements of Pr2Pt6Ga15 at
Yuji Matsumoto
low temperature
科

Nagoya Institute ofTechnology

Takuya Ueda

Nagoya Institute ofTechnology〃
Theoretical and experimental studies of determination ofsuperconducting symmetry

5

〃

植田

拓也

名古屋工業大学

大学院工学研究科6

近藤半導体の秩序状態における極低温磁化測定

田山

孝

富山大学

大学院理工学研 Low-temperature magnetization measurements of orderedstates in Kondo semiconductor
究部（理学）

Takashi Tayama

University of Toyama

7

〃

湯谷

大志郎

富山大学

大学院理工学教育部 ( 理学 )Daishirou Yutani

University of Toyama8

極低温磁化測定による SmTr2Zn20 (Tr = Rh, Ir)の一次転移と磁場誘起相の検証

加瀬

直樹

新潟大学

Magnetization measurements of anti-ferromagnetic compound
大学院自然科学
SmTr2Zn20 (Tr = Rh, Ir) with first-order transition and fieldKase Naoki
研究科
induced phase transition

9

〃

棚橋

正貴

新潟大学

大学院自然科学研究科

層状 BiS2 化合物 LnOBiS2 における異常低エネル
東中
ギー励起の起源解明

隆二

首都大学東京大学院理工学研 Investigation of the origin of the exotic low temperature
excitation in LnOBiS2
究科

Ryuji Higashinaka

Tokyo Metropolitan
University

Takuya Asano

Tokyo Metropolitan
University

Hiroshi Yaguchi

Tokyo University of
Science

Teruo Yamazaki

Tokyo University of
Science

10

〃

〃

〃

Niigata University

Tanahashi Masataka Niigata University

11

〃

浅野

卓也

首都大学東京大学院理工学研
究科

12

ルテニウム酸化物 Sr2RuO4 における一軸性圧力
下比熱測定

矢口

宏

東京理科大学

理工学部

13

〃

山崎

照夫

東京理科大学

理工学部

スピンと軌道の特異な結合を有する物質の高圧合
有馬
成

孝尚

東京大学

大学院新領域創 High-pressure syntheses of materials with unique spin-orbital
coupling
成科学研究科Takahisa Arima

The University of
Tokyo

祐介

東京大学

大学院新領域創成科学研究科

Yusuke Tokunaga

The University of
Tokyo

14
15

〃

徳永

〃
Specific heat measurements of the ruthenate Sr2RuO4 under
uniaxial pressure

〃

〃

No.

課題名

氏名

所属

16

〃

阿部

伸行

東京大学

17

〃

松浦

慧介

18

〃

鷲見

19

〃

Title

Name

Organization

大学院新領域創成科学研究科〃Nobuyuki Abe

The University of
Tokyo

東京大学

大学院新領域創成科学研究科〃

Keisuke Matsuura

The University of
Tokyo

浩樹

東京大学

大学院新領域創成科学研究科〃

Hiroki Sumi

The University of
Tokyo

藤間

友理

東京大学

大学院新領域創成科学研究科〃Yuri Fujima

The University ofTokyo

20 有機無機ハイブリット磁性体の低温物性

山口博則

大阪府立大学

大学院理学系研 Low temperature physical properties of metal-radical complex
Hironori Yamaguchi
matarials
究科

Osaka Prefecture
University

21

〃

佐々木

大阪府立大学

大学院理学系研
究科〃

Yuta Sasaki

Osaka Prefecture
University

22

〃

岡田

将孝

大阪府立大学

大学院理学系研
究科〃

Masataka Okada

Osaka Prefecture
University

Tb2+xTi2-xO7+y における量子スピン液体状態の
門脇
研究

広明

首都大学東京大学院理工学研
Quantum spin liquid in Tb2+xTi2-xO7+y
究科

Hiroaki Kadowaki

Tokyo Metropolitan
University

枝元広紀

首都大学東京大学院理工学研
究科

Hiroki Edamoto

Tokyo Metropolitan
University

有機一次元三角格子モット絶縁体における磁場誘清水
起相転移の探索康弘

名古屋大学

大学院理学研究 Magnetic eld induced transition in an organic Mott insulator
with one-dimensional triangular lattice
科

Yasuhiro Shimizu

Nagoya University

顕一郎

東北大学

Study of the charge-lattice interaction in the charge
金属材料研究所 supercooled liquid and glass states in strongly correlatedorganic compounds

Kenichiro Hashimoto Tohoku University

静岡大学

理学部

23
24

〃

担当所員：瀧川

ISSP Activity Report 201525

初果

強相関有機導体で発現する電荷過冷却液体・電荷
橋本
ガラス状態における電荷 - 格子相互作用の研究

担当所員：中辻27

知

Ce および Yb 系強相関化合物における磁場中ミ
リケルビン領域での物性測定担当所員：リップマー

99

28

〃

仁

担当所員：森
26

裕太

海老原

孝雄

Low temperature physical properties at magnetic fields instrongly correlated electron system

Takao Ebihara

Shizuoka University

ミック

遷移金属酸化物ヘテロ界面金属層における 3d、5d 遷移金属ドープの影響李美希

奈良先端科学技 物質創成科学研 Effects of the 3d,5d transition metal on metallic conductivity at
Mihee Leetransition metal oxides hetero interface
術大学院大学
究科

Nara Instituteof Science andTechnology

100

No.
29

課題名
真空蒸着法で製膜されたペロブスカイト太陽電池
川嶋の構造・機能性の評価

ISSP Activity Report 2015

30 新規ウルツァイト型四面体強誘電体材料の創成
31

氏名

所属

Title

Name

Organization

東京大学

大学院新領域創 A study of structural and functional properties of perovskite
solar cells fabricated by vacuum evapolation method
成科学研究科Kazuhiro Kawashima

The University of
Tokyo

伸太郎

東京工業大学

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

Shintaro Yasui

Tokyo Institute ofTechnology

祐司

東北大学

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

Yuji Matsumoto

Tohoku University

安井一裕

パルスレーザー堆積法による多成分系ナノ相分離
松本
酸化物薄膜の構造と物性

32

〃

丸山

伸伍

東北大学

大学院工学研究科〃

Shingo Maruyama

Tohoku University

33

〃

川平

祐太

東北大学

大学院工学研究
科〃

Yuta Kawahira

Tohoku University

太陽電池用シリコン還元プロセスにおけるニッケ
伊高
ルフラックス効果の解析

健治

弘前大学

北日本新エネル Nickel Flux-effect under the direct reduction process for solar
grade silicon
ギー研究所

Kenji Itaka

Hirosaki University

士郎

山形大学

大学院理工学研 Hall coefficient measurement of Pb-substituted Bi-based
superconductors(3)究科Shiro Kambe

Yamagata University

34

担当所員：家泰弘

35 Pb 置換 Bi 系超伝導体のホール係数測定（３）

神戸

36

〃

魏 毓良

山形大学

工学部

〃

Gi Yokuryou

Yamagata University

37

〃

鈴木

沙耶

山形大学

大学院理工学研
究科〃

Saya Suzuki

Yamagata University

38

〃

鈴木

健弘

山形大学

大学院理工学研
究科〃

Takehiro Suzuki

Yamagata University

39

〃

増川

拓未

山形大学

大学院理工学研
究科〃

Takumi Masukawa

Yamagata University

水の光分解触媒素材用酸窒化物及び酸硫化物の構
山田造と物性の研究太郎

東京大学

大学院工学系研 Structural and physical studies of photoactive oxynitrides andoxysulfides as materials for water splitting catalysts
究科

Taro Yamada

The University of
Tokyo

東京大学

大学院工学系研
究科〃

Zhong Miao

The University ofTokyo

担当所員：吉信
40

淳

41

〃

鐘

苗

42

〃

西山

洋

東京大学

大学院工学系研
究科〃

Hiroshi Nishiyama

The University of
Tokyo

43

〃

後藤

陽介

東京大学

大学院工学系研
究科〃

Yosuke Goto

The University of
Tokyo

No.

課題名

44

〃

坂井

延寿

東京大学

大学院工学系研
究科〃

Enju Sakai

The University of
Tokyo

45

〃

守屋

映祐

東京大学

大学院工学系研
究科〃

Yosuke Moriya

The University of
Tokyo

46

〃

岩瀬

元希

明治大学

研究・知財戦略機構〃

Motoki Iwase

Meiji University47

Ag(110) 上に作成した (1 × 1)TiO2 薄膜の STM に枝元
よる構造解析

一之

立教大学

理学部

STM study on the structure of a (1 × 1) TiO2 film formed on
Ag(110)

Rikio Settai

Rikkyo University

48

HREELS による非占有バンドでの電子格子相互作
田中
用：単結晶グラファイトの研究

慎一郎

大阪大学

産業科学研究所

The electron-phonon coupling in the empty bands investigatedShin-ichiro Tanaka
by the HREELS: A study of single crystalline graphite49

Si(001) 表面上の準安定共吸着過程の透過 FTIR 測
大野
定

真也

横浜国立大学

大学院工学研究 FTIR measurements of metastable physisorption processes on
Si(001)
院

Shinya Ohno

Yokohama National
University

清水

正太郎

横浜国立大学

大学院工学府Shimizu Shotaro

Yokohama National
University

51 水素終端 Si(110)-(1 × 1) 表面のエッチング過程

須藤

彰三

東北大学

大学院理学研究 Wet chemical etching process of the hydrogen terminatedSi(110)-(1 × 1) surfaces
科

Shozo Suto

Tohoku University

52

川本

絵里奈

東北大学

大学院理学研究
科

Erina Kawamoto

Tohoku University

53 脳内物質ドーパミン分子の高分解能振動分光

米田

忠弘

東北大学

多元物質科学研High resolution vibration spectroscopy of dopamine molecules Tadahiro Komeda
究所

Tohoku University

54

〃

高岡

毅

東北大学

多元物質科学研
究所〃

Tsuyoshi Takaoka

Tohoku University

55

〃

朝見

翔

東北大学

多元物質科学研究所〃

Sho Asami

Tohoku University

純志

青山学院大学

大学院理工学研 Study of novel phenomena in graphene, carbon nanotube, andJyunji Haruyama
2D mono-atomic layers
究科

Aoyama Gakuin
University

50

〃

〃

ISSP Activity Report 2015

担当所員：勝本
56

氏名

所属

Title

〃

〃

Name

Organization

Osaka University

信吾

グラフェン、カーボンナノチューブ、及び二次元
春山
単原子層の新奇物性の研究

101

57

〃

大畠

智佳

青山学院大学

大学院理工学研
究科〃

Chika Ohata

Aoyama Gakuin
University

58

〃

野村

くみ子

青山学院大学

大学院理工学研
究科〃

Kumiko Nomura

Aoyama Gakuin
University

59

〃

深井

佳乃

青山学院大学

大学院理工学研
究科〃

Yoshino Fukai

Aoyama Gakuin
University

102

No.

課題名

60

〃

ISSP Activity Report 2015

61 交流熱伝導率測定のための温度計開発
担当所員：小森
62

氏名

所属

Title

Name

〃

Yoto Katagiri

Aoyama Gakuin
University

Koichi Izawa

Tokyo Institute ofTechnology

Masato Kotsugi

Tokyo University of
Science

Kan Nakatsuji

Tokyo Institute ofTechnology

勇人

青山学院大学

大学院理工学研
究科

井澤 公一

東京工業大学

大学院理工学研 Development of thermometry for ac thermal-conductivity
measurements
究科真人

東京理科大学

基礎工学部

寛

東京工業大学

大学院総合理工 Hydrogen absorption at the interface of Ag thin film andSi(111) substrate
学研究科

片桐

Organization

文夫

レアメタルフリー磁性材料の磁気異方性発現メカ
小嗣
ニズムの解析

63 Ag 超薄膜 /Si(111) 基板界面への水素吸蔵

中辻

Analysis of magnetic anisotropy of rare-metal-free magnetic
materials

64

金属／半導体表面上ナノ構造の形成とナノ構造を河村持つ表面における光学応答の時間分解測定

紀一

日本放送協会

放送技術研究所

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

Norikazu Kawamura

NIPPON HOSO
KYOKAI65

Al-Pd-Ru 準結晶・近似結晶における空孔濃度の
金沢
研究

育三

東京学芸大学

教育学部

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

Ikuzo Kanazawa

Tokyo Gakugei
University

東京学芸大学

大学院教育学研
究科〃

Tomoaki Sasaki

Tokyo Gakugei
University

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

Japan Advanced
Institute of Science andTechnology

66〃

担当所員：長谷川
67

佐々木

友彰

幸雄

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

由起子

68

〃

アントワーヌフロランス

北陸先端科学技 マテリアルサイ術大学院大学
エンス研究科〃

Antoine Fleurence

Japan Advanced
Institute of Science andTechnology

69

〃

米澤

隆宏

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〃Takahiro Yonezawa

Japan Advanced
Institute of Science andTechnology

重い電子系超伝導の実空間観察のための超低温・河江
強磁場の小型 STM の開発

達也

九州大学

大学院工学研究 Development of a miniature STM for low-temperature andhigh-eld measurements of heavy fermion superconductors
院

Tastuya Kawae

Kyushu University

70
71

〃

高田

弘樹

九州大学

大学院工学府〃

Hiroki Takata

Kyushu University

72

〃

志賀

雅亘

九州大学

大学院工学府〃

Masanobu Shiga

Kyushu University

顕一郎

東北大学

金属材料研究所

担当所員：山下73

穣

三角格子構造をもつ有機導体の電荷グラス状態に橋本
おける熱伝導率測定

Thermal conducitivity measurements in a charge-glass state of
Kenichiro Hashimoto Tohoku University
an organic compound with a triangular lattice

No.

課題名

氏名

所属

74

超流動 He-3,A1 相中のスピン流れと電場の交差
相関の探索

白濱

圭也

慶應義塾大学

理工学部

75

〃

山口

明

兵庫県立大学

76

〃

村川

智

77

〃

互井

78
79

Title

Name

Organization

Study of cross-correlation between spin flow and electric fieldin superfluid He-3 A1

Keiya Shirahama

Keio University

大学院物質理学研究科〃

Akira Yamaguchi

The University of
Hyogo

東京大学

低温センター〃

Satoshi Murakawa

The University of
Tokyo

通裕

慶應義塾大学

大学院理工学研
究科〃

Michihiro Tagai

Keio University

導電性ラングミュア・ブロジェット膜の高圧下の三浦
電気的性質に関する研究

康弘

桐蔭横浜大学

大学院工学研究 Studies on electrical properties of conductive langmuir-blodgett
Yasuhiro Miurafilms under high pressure
科

平面四配位鉄酸化物における電荷移動転移温度の
山本
圧力依存性

隆文

京都大学

大学院工学研究 Pressure dependence of charge transfer transition temperature
Takafumi Yamamoto Kyoto Universityof square planar iron oxide
科担当所員：上床美也
Toin University of
Yokohama

ISSP Activity Report 2015

103

80

〃

小林

洋治

京都大学

大学院工学研究
科〃

Yoji Kobayashi

Kyoto University

81

〃

竹入

史隆

京都大学

大学院工学研究
科〃

Takeiri Fumitaka

Kyoto University

82

〃

村上

泰斗

京都大学

大学院工学研究
科〃

Taito Murakami

Kyoto University

83 三元系化合物 EuCuP2 の比熱測定

藤原

哲也

山口大学

大学院理工学研
Specific measurement of ternary compound EuCuP2
究科

Tetsuya Fujiwara

Yamaguchi University

84

繁岡

透

山口大学

大学院理工学研
究科

Toru Shigeoka

Yamaguchi University

哲也

山口大学

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

Tetsuya Fujiwara

Yamaguchi University

繁岡

透

山口大学

大学院理工学研
究科

Toru Shigeoka

Yamaguchi University

87 LaFe2P2 の高圧力下電気抵抗測定

藤原

哲也

山口大学

大学院理工学研
Resistivity measurement of LaFe2P2 under high pressure
究科

Tetsuya Fujiwara

Yamaguchi University

88

繁岡

透

山口大学

大学院理工学研
究科

Toru Shigeoka

Yamaguchi University

顕一郎

東北大学

Study of the temperature-pressure phase diagram of the one金属材料研究所 dimensional charge-ordered organic compound δｃ -(BPDTTTF)2ICl2

85
86

89

〃

Pr-Zn-Ge 三元系新規化合物の合成および単結晶
藤原
育成
〃

〃

一次元電荷秩序系有機導体δ c-(BPDT-TTF)2ICl2
橋本の温度圧力相図の研究

〃

〃

〃

Kenichiro Hashimoto Tohoku University

104

No.

課題名

90

〃

氏名

所属

ISSP Activity Report 2015

小林

亮太

東北大学

大学院理学研究
科

繁岡

透

山口大学

藤原

哲也

93 擬三元系 (Ho,R)Rh2Si2 単結晶の磁気特性 2

繁岡

94

Title

〃

Name

Organization

Ryota Kobayashi

Tohoku University

大学院理工学研 Magnetic transition of polymorphic compound RIr2Si2(R=rare
earth) 5
究科

Toru Shigeoka

Yamaguchi University

山口大学

大学院理工学研
究科

Tetsuya Fujiwara

Yamaguchi University

透

山口大学

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

Yamaguchi University

藤原

哲也

山口大学

大学院理工学研
究科

Tetsuya Fujiwara

Yamaguchi University

95 圧力下で価数転移を示す Eu 化合物の探索

本多

史憲

東北大学

金属材料研究所

96

大貫

惇睦

琉球大学

理学部

97 Yb2Pt6X15(X=Al, Ga) の高圧下電気抵抗測定

松本裕司

名古屋工業大学

98

中村

友紀

名古屋工業大学村田惠三

大阪経済法科大 21 世紀社会総合 Development of high pressure technique orienting to theresearch of organic concductors
学
研究センター

ハロゲン架橋金混合原子価錯体 , Cs2Au2X6 (X =100 Cl, Br, I) の特異な原子価状態に由来する高圧下伝 榎本
導挙動の研究真哉

東京理科大学

101

小島

憲道

豊田理化学研究所

充填スクッテルダイト化合物の超伝導転移温度の
川村
圧力変化

幸裕

室蘭工業大学真吾

91 多形化合物 RIr2Si2(R= 希土類）の磁気転移
92

〃

〃

〃

〃

99 有機導体研究に向けた静水圧高圧技術の開発

102

〃

103
104

〃

5

出南

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

105
106 YbH2+x の磁性と伝導

〃

〃

〃

Investigation of valence transition of Eu compounds under highHonda Fuminoripressure

Tohoku University

Yoshichika Onuki

University of the
Ryukyus

大学院工学研究 Electrical resistivity measurements of Yb2Pt6X15(X=Al, Ga)
under high pressure科

Yuji Matsumoto

Nagoya Institute ofTechnology

大学院工学研究科

Yuki Nakamura

Nagoya Institute ofTechnology

Keizo Murata

Osaka University of
Economics and Law

Investigation of the high pressure effect on the conductivityof a series of halogen-bridged gold mixed valence complexes,
Cs2Au2X6 (X = Cl, Br, I).

Masaya Enomoto

Tokyo University of
Science〃

Kojima Norimichi

Toyota Physical andChemical ResearchInstitute

大学院工学研究 Pressure effect of superconducting transition temperature on
filled skutterudite compounds
科

Yukihiro Kawamura

Muroran Institute ofTechnology

室蘭工業大学

大学院工学研究科

Shingo Deminami

Muroran Institute ofTechnology

鹿児島大学

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

Kagoshima University

Yutaro Fujimoto

Kagoshima University

Osamu Nakamura

Okayama University of
Science

理学部

〃

〃

〃

藤本

祐太郎

鹿児島大学

大学院理工学研
究科中村修

岡山理科大学

学外連携推進室 Magnetic and transport properties in YbH2+x

〃

No.

課題名

氏名

所属

Title

Name

Organization

ISSP Activity Report 2015

107 Sr2MO4 (M = V, Cr) の高圧下電気抵抗測定

桜井裕也

物質・材料研究機構

Resistivity measurements under pressure for Sr2MO4 (M = V,Cr)

108 強相関型セリウム合金の磁性と超伝導

雨海有佑

室蘭工業大学

大学院工学研究 Magnetism and superconductivity in the strongly correlated Ce
Yusuke Amakai
alloys科

Muroran Institute ofTechnology

109 YbCo2Zn20 の Co 元素位置の置換効果 II

阿曽

尚文

琉球大学

理学部

Naofumi Aso

University of the
Ryukyus

110

〃

小林

理気

琉球大学

理学部

〃

Riki Kobayashi

University of the
Ryukyus

111

〃

比嘉

泰之

琉球大学

大学院理工学研
究科〃

Yasuyuki higa

University of the
Ryukyus

112 回転希釈冷凍機を用いた量子液体・固体研究白濱圭也

慶應義塾大学

理工学部

Keiya Shirahama

Keio University

113

〃

高橋

大輔

足利工業大学

共通課程〃

Daisuke Takahashi

Ashikaga Institute ofTechnology

114

〃

村川

智

東京大学

低温センター〃

Satoshi Murakawa

The University of
Tokyo

115

〃

立木

智也

慶應義塾大学

大学院理工学研
究科〃

Tomoya Tsuiki

Keio University

116 YbCo2Zn20 の Zn 元素位置の置換効果 II

阿曽

尚文

琉球大学

理学部

Naofumi Aso

University of the
Ryukyus

117

〃

小林

理気

琉球大学

理学部

〃

Riki Kobayashi

University of the
Ryukyus

118

〃

高村

治希

琉球大学

大学院理工学研
究科〃

Haruki Takamura

University of the
Ryukyus

強相関型セリウム化合物の量子相転移と磁気的性
村山
質

茂幸

室蘭工業大学

大学院工学研究 Quantum phase transition and magnetic properties in thestrongly correlated Ce compounds
科

Shigeyuki Murayama

Muroran Institute ofTechnology

119

Substitution effect at Co element in YbCo2Zn20 II

Study of quantum fluids and solids using rotating dilution
refrigerator

Substitution effect at Zn element in YbCo2Zn20 II

Hiroya Sakurai

NIMS

105

120 Mn2Sb 基のメタ磁性転移への元素置換効果

三井

好古

鹿児島大学

大学院理工学研 Substitution effect of metamagnetic transition of Mn2Sb-basedmagnetic material
究科

Yoshifuru Mitsui

Kagoshima University

121

若森

太音

鹿児島大学

大学院理工学研
究科

Taoto Wakamori

Kagoshima University

122 Cr 基遍歴電子強磁性体の磁気特性

三井

好古

鹿児島大学

大学院理工学研 Magnetic properties of Cr-based itinerant ferromagnetic
materials
究科

Yoshifuru Mitsui

Kagoshima University

123

吉永

総志

鹿児島大学

大学院理工学研
究科

Soshi Yoshinaga

Kagoshima University

〃

〃

〃

〃

106

No.
124

課題名

氏名

CeTX3(T: 遷移金属 ,X:Ge,Si) の圧力下電気抵抗測
広瀬
定

所属

ISSP Activity Report 2015

雄介

新潟大学

理学部

目黒

凌平

新潟大学

大学院自然科学研究科

ホイスラー化合物強磁性体 Fe2CoGa の高圧化磁
伊藤
化測定

昌和

鹿児島大学

松隈

秀憲

128 Mn2Sb 基メタ磁性体の磁気特性

小山

佳一

129

125

〃

Title

Name

Organization

Electrical resistivity measurement of CeTX3 (T:Transition Metal,
Hirose Yusuke
X:Si,Ge) under high pressure

Niigata University〃

Ryohei Meguro

Niigata University

大学院理工学研
Magnetization of Heusler compoundFe2CoGa under pressure
究科

Masakazu Ito

Kagoshima University

鹿児島大学

大学院理工学研
究科

Hidenori Matsuguma Kagoshima University

鹿児島大学

大学院理工学研
Magnetic properties of Mn2Sb-based metamagnets
究科

Keiichi Koyama

アッドライン
ンゴジ ム
ウッド

鹿児島大学

大学院理工学研
究科

Adline Ngozi Nwodo Kagoshima University

130 有機分子性導体の高圧物性の研究

鳥塚

潔

武蔵野大学

教育学部

Studies on high pressure properties of organic molecular
conductors

131 圧力誘起価数転移の探索と高圧下輸送特性

辺土

正人

琉球大学

理学部

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

132

安次富

琉球大学

大学院理工学研
究科

126
127

〃

〃

〃

洋介

〃

〃

〃
Pressure effect on transport properties of transition metalcompounds

Kiyoshi Torizuka

Kagoshima University

Musashino University
University of the
Ryukyus

Yousuke Ashitomi

University of the
Ryukyus

Takao Nakama

University of the
Ryukyus133 遷移金属化合物の高圧力下の輸送特性

仲間 隆男

琉球大学

理学部

134

〃

照屋

淳志

琉球大学

大学院理工学研
究科〃

Teruya Atsushi

University of the
Ryukyus

135

〃

屋良

朝之

琉球大学

大学院理工学研
究科〃

Tomoyuki Yara

University of the
Ryukyus136 価数揺動物質の高圧力中輸送特性の研究

仲間 隆男

琉球大学

理学部

Takao Nakama

University of the
Ryukyus

137

鈴木

史記

琉球大学

大学院理工学研
究科〃

Fuminori Suzuki

University of the
Ryukyus138 ウルマナイト型化合物の高圧下における物性研究 仲間 隆男

琉球大学

理学部

Physical properties of the Ullmannite-type compounds underhigh pressure

Takao Nakama

University of the
Ryukyus139〃

Kengo Nishimura

University of the
Ryukyus

140

〃

西村

健吾

琉球大学

大学院理工学研究科

空間反転対称性のない遷移金属間化合物とその関
辺土
連物質の高圧下輸送特性

正人

琉球大学

理学部

〃

Trasport properties of valence fluctuating compounds underpressure

Transport properties of non-centrosymmetric transition metals
Masato Hedo
compounds under high pressure

University of the
Ryukyus

No.

課題名

141

〃

氏名

所属

垣花

将司

琉球大学

大学院理工学研
究科

142 TmB4 の磁気準周期秩序相における圧力効果

伊賀

文俊

茨城大学

理学部

143

道村

真司

埼玉大学

研究機構科学分
析支援センター

144 希土類化合物における価数揺らぎの研究

中野

智仁

新潟大学

145

高橋

英亮

層状希土類化合物における新奇量子臨界現象の探中野
索とその圧力効果

146

〃

〃

147

〃

寺島

Title

Name

Organization

Masashi Kakihana

University of the
Ryukyus

Fumitoshi Iga

Ibaraki University

Shinji Michimura

Saitama University

大学院自然科学
Study of the valence fluctuation of rare-earth compounds
研究科

Nakano Tomohito

Niigata University

新潟大学

大学院自然科学研究科

Eisuke Takahashi

Niigata University

智仁

新潟大学

大学院自然科学 Investigation of novel quantum critical phenomena in layerdrare earth compound and its pressure effect研究科

Nakano Tomohito

Niigata University

宗一郎

新潟大学

大学院自然科学研究科

Terashima Soichiro

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

〃

〃

〃

148

平行平板間の超流動ヘリウム 3-A 相での新奇量子
石川
渦の検出

修六

大阪市立大学

理学研究科

149

鉄系超伝導体関連化合物 KxFe2-yS2 の圧力下電気
小林
抵抗測定

寿夫

兵庫県立大学

大学院物質理学 Electrical resistivity measurement under high pressure on
KxFe2-yS2 related with iron based superconductors
研究科

Hisao Kobayashi

The University of
Hyogo

健自

京都大学

大学院情報学研
Parallelization of a tensor network variational method
究科

Kenji Harada

Kyoto University

周

東京大学

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

Shu Yamaguchi

The University ofTokyo

担当所員：川島

ISSP Activity Report 2015

151

Osaka City University

直輝

150 テンソルネットワーク変分法の並列化
担当所員：廣井Investigation of the novel quantized vortices in superfluid 3HeOsamu Ishikawa
A phase between parallel plates

原田善二

超高圧プレスを用いた新規プロトニクス酸化物の山口
ソフト化学的合成法の検討

107

152

〃

三好

正悟

東京大学

大学院工学系研
究科〃

Shogo Miyoshi

The University of
Tokyo

153

〃

田中

和彦

東京大学

大学院工学系研
究科〃

Kazuhiko Tanaka

The University of
Tokyo

154

〃

本多

慶一郎

東京大学

大学院工学系研
究科〃

Keiichiro Honda

The University of
Tokyo

山口

周

東京大学

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

Shu Yamaguchi

The University ofTokyo

155 溶融亜鉛メッキ合金相の応力誘起変態

108
ISSP Activity Report 2015

No.

課題名

156

〃

三好

正悟

東京大学

157

〃

田中

和彦

篠崎

158

対向型ダブルトロイダルアンビルを用いた 20
GPa までの圧力発生

氏名

所属

Name

Organization

大学院工学系研
究科〃

Shogo Miyoshi

The University of
Tokyo

東京大学

大学院工学系研
究科〃

Kazuhiko Tanaka

The University of
Tokyo

彩子

名古屋大学

大学院環境学研 High pressure experiments up to 20 GPa using the opposedanvil type pressure apparatus
究科

Ayako Shiozaki

Nagoya University

洋

京都大学

大学院工学研究 High pressure X-ray diffraction measuremnt for Eu-substituted
square iron oxide
科

Hiroshi Kageyama

Kyoto University
Kyoto University

159 Eu 固溶平面四配位鉄酸化物の高圧 X 線回折測定 陰山

Title

160

〃

セドリック
タッセル

京都大学

大学院工学研究
科〃

Cedric Tassel

161

〃

山本

隆文

京都大学

大学院工学研究
科〃

Takafumi Yamamoto Kyoto University

162

〃

松本

勇輝

京都大学

大学院工学研究科〃

Yuki Matsumoto

Kyoto University

163 分子性希ガス化合物の高圧合成と評価

丹羽

健

名古屋大学

大学院工学研究 High pressure synthesis and characterization of molecular
noble gas compounds
科

Ken NIWA

Nagoya University

164

松崎

郁弥

名古屋大学

大学院工学研究科

Matsuzaki Fumiya

Nagoya University

165 鉄族元素を含むイオン伝導性結晶の高圧合成

丹羽

健

名古屋大学

大学院工学研究 High pressure synthesis of novel ion conductive oxides
containing iron group elements
科

Ken Niwa

Nagoya University

166

廣瀬

瑛一

名古屋大学

大学院工学研究科

Eiichi Hirose

Nagoya University

元

名古屋大学

大学院工学研究High pressure synthesis of novel A-site ordered perovskites
科

Shimura Gen

Nagoya University

167

〃

〃

新規 A サイト秩序型ペロブスカイト複酸化物の高
志村
圧高温合成

〃

〃

168 難窒化性後期遷移金属窒化物の高圧合成

白子

雄一

名古屋大学

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

Yuichi Shirako

Nagoya University

169

寺部

俊紀

名古屋大学

大学院工学研究科

Terabe Toshiki

Nagoya University

新規アンチポストペロブスカイト及びその関連窒
白子化物の高圧合成雄一

名古屋大学

大学院工学研究 High pressure synthesis of new nitrides with anti-postperovskite or the related structure
科

Yuichi Shirako

Nagoya University

祥吾

名古屋大学

大学院工学研究科

Shogo Yamada

Nagoya University

名古屋大学

大学院工学研究 Synthesis of novel phosphor-rich transition-metal phosphides
in ultra-high pressures
科

Masashi Hasegawa

Nagoya University

170
171
172

〃

〃

山田

超高圧合成手法を用いた燐に富む新規遷移金属燐
長谷川
化物の創製

正

〃

〃

No.

課題名

173

〃

174

氏名

175

〃

三影

Title

Name

〃

Keita Nishidouzono

Organization

啓太

名古屋大学

大学院工学研究科

ちひろ

室蘭工業大学

大学院工学研究 High-pressure synthesis of alkaline earth metal based new filled
Chihiro Sekine
skutterudite compounds
科

Muroran Institute ofTechnology

勇人

室蘭工業大学

大学院工学研究
科

Hayato Mikage

Muroran Institute ofTechnology

東京大学

大学院理学系研
Peptide formation of amino acids under high pressure
究科

Hiroyuki Kagi

The University of
Tokyo

東京大学

大学院理学系研
究科

Chikako Fujimoto

The University of
Tokyo

東京大学

大学院理学系研
Reactivity of nitrogen with minerals at mantle conditions
究科

Hiroyuki Kagi

The University of
Tokyo

西堂園

アルカリ土類金属元素を含む新充填スクッテルダ
関根
イト化合物の高圧合成

所属

176 高圧下でのアミノ酸のペプチド化反応の観察

鍵

177

〃

藤本

178

高温高圧条件におけるマントル鉱物と窒素との反
鍵
応性の探索

179

〃

篠崎

彩子

名古屋大学

大学院環境学研
究科〃

Ayako Shiozaki

Nagoya University

180

〃

久保

俊智

東京大学

大学院理学系研
究科〃

Toshinori Kubo

The University of
Tokyo

181

磁性不純物による三角スピンチューブのスピンダ
真中
イナミクスの変化

浩貴

鹿児島大学

大学院理工学研 Magnetic impurity effect on spin dynamics of triangular spin
tubes
究科

Hirotaka Manaka

Kagoshima University

182

Ce(Ru1-xRhx)2Al10 単結晶試料の高エネルギー X
阿曽線ラウエ装置による結晶方位同定

尚文

琉球大学

理学部

Alignment of Ce(Ru1-xRhx)2Al10 single crystals by high-energy
X-ray Laue diffaction

Naofumi Aso

University of the
Ryukyus

担当所員：中辻裕之〃

Nagoya University

千賀子
裕之

〃

知

ISSP Activity Report 2015

183

〃

小林

理気

琉球大学

理学部

〃

Riki Kobayashi

University of the
Ryukyus

184

〃

高村

治希

琉球大学

大学院理工学研
究科〃

Haruki Takamura

University of the
Ryukyus

淳

茨城大学

理学部

Makoto Yokoyama

Ibaraki University

大高

凌

茨城大学

大学院理工学研
究科

Ryo Otaka

Ibaraki University

山崎照夫

東京理科大学

理工学部

Teruo Yamazaki

Tokyo University of
Science

担当所員：吉澤
185
186

英樹

重い電子系化合物が示す非従来型超伝導と磁性の
横山
相関
〃

109

187 希土類合金 Gd1-xLax の磁気秩序

Interplay between unconventional superconductivity andmagnetism in heavy-fermion compounds〃
Magnetic orders of the rare-earth alloy Gd1-xLax

110

No.

課題名

188

〃

ISSP Activity Report 2015

189

氏名

所属

舞

東京理科大学

大学院理工学研
究科照夫

東京理科大学

理工学部

東京理科大学

大学院理工学研
究科

栗原

鉄系超伝導体 FeTe1-xChx (Ch=S, Se) の Te 雰囲
山崎
気中アニール効果

Name

Organization〃

Mai Kurihara

Tokyo University of
Science

Teruo Yamazaki

Tokyo University of
Science

Satoshi Kubota

Tokyo University of
Science

Hiroshi Yaguchi

Tokyo University of
Science

Effect of Te-annealing in the Fe-based superconducters
FeTe1-xChx (Ch=S, Se)

190

〃

久保田

191

鉄系超伝導体 FeTe1-xSx の純良単結晶におけるO2 雰囲気中アニールの効果

矢口宏

東京理科大学

理工学部

192

〃

山崎

照夫

東京理科大学

理工学部〃

Teruo Yamazaki

Tokyo University of
Science

193

〃

飯泉

武顕

東京理科大学

大学院理工学研
究科〃

Takeaki Iizumi

Tokyo University of
Science194 YbCo2Zn20 置換系試料の極低温比熱測定

阿曽

尚文

琉球大学

理学部

Naofumi Aso

University of the
Ryukyus

195

〃

小林

理気

琉球大学

理学部

〃

Riki Kobayashi

University of the
Ryukyus

196

〃

比嘉

泰之

琉球大学

大学院理工学研
究科〃

Yasuyuki higa

University of the
Ryukyus格千葉工業大学

工学部

Dynamic Study of amorphous polystyrene with low molecularweight near the glass transition temperature

Itaru Tsukushi

Chiba Institute ofTechnology

担当所員：山室
197

聡

Title

〃
Effect of O2-annealing in the pure single crystals of the Febased superconducters FeTe1-xSx

Specific heat measurement at very low temperature in
substituted YbCo2Zn20 system

修

低分子量アモルファスポリスチレンのガラス転移筑紫
温度近傍における動的性質

198

〃

西山

枝里

千葉工業大学

大学院工学研究科〃

Eri Nishiyama

Chiba Institute ofTechnology

199

〃

藤村

順

千葉工業大学

大学院工学研究
科〃

Fujimura Jun

Chiba Institute ofTechnology

断熱消磁法を組み合わせた 1K 以下の温度域にお野口けるパルス強磁場システム開発

悟

大阪府立大学21 世紀科学研究 Research and development of pulsed magnets combined withadiabatic refrigerator below 1 K
機構

Satoru Noguchi

Osaka Prefecture
University

賢斗

大阪府立大学

大学院工学研究科

Kento Iida

Osaka Prefecture
University

静岡大学

理学部

Takao Ebihara

Shizuoka University

担当所員：金道
200
201

浩一

〃

202 希土類金属間化合物の強磁場物性研究

飯田
海老原

孝雄

〃
Physical properties in rare earth intermetallic compounds athigh magnetic fields

No.
203
204

課題名

氏名

チタン系化合物における幾何学的競合効果と強磁
浅野
場物性
〃

貴行

一二三

優汰

所属

Title

Name

Organization

福井大学

大学院工学研究 Geometrically frustrated effect and magnetic properties underhigh-magnetic fields on titanium compounds
科

Takayuki Asano

University of Fukui

福井大学

大学院工学研究
科

Yuta Hifumi

University of Fukui〃

205 幾何学的フラストレート磁性体の強磁場磁化測定 菊池

彦光

福井大学

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

Hikomitsu Kikuchi

University of Fukui

206

国枝

賢治

福井大学

大学院工学研究科

Kenji Kunieda

University of Fukui

赤木

暢

大阪大学

大学院理学研究 Specific heat measurements of Ca2CoSi2O7 in high magnetic
fields科ー

Mitsuru Akaki

Osaka University

政幸

大阪大学

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

Masayuki Hagiwara

Osaka University

谷口

一也

大阪大学

大学院理学研究科

Kazuya Taniguchi

Osaka University

重い電子系 CeFe1-xCrxPO の低温比熱測定による
神原
磁気的性質の解明

陽一

慶應義塾大学

理工学部

Yoichi Kamihara

Keio University

井田和則

慶應義塾大学

大学院理工学研
究科

Kazunori Ida

Keio University

212 高温超伝導体のパルス強磁場下輸送現象

掛谷

一弘

京都大学

大学院工学研究 Transport phenomena in high-Tc superconductors under pulsed
Itsuhiro Kakeya
high magnetic fields
科

Kyoto University

213

〃

小森

祥央

京都大学

大学院工学研究科〃

Sachio Komori

Kyoto University

214

〃

野村

義樹

京都大学

大学院工学研究科〃

Yoshiki Nomura

Kyoto University

215 ホイスラー化合物の強磁場磁化

廣井

政彦

鹿児島大学

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

Masahiko Hiroi

Kagoshima University

216

田底

知也

鹿児島大学

大学院理工学研
究科

Tomoya Tazoko

Kagoshima University

フラストレート格子をもつ遷移金属フッ化物単結
植田
晶の強磁場磁性浩明

京都大学

大学院理学研究 magnetism of single crystals of transition metal fluorides withfrustrated lattices under high magnetic field科

Hiroaki Ueda

Kyoto University〃

207 Ca2CoSi2O7 における強磁場下比熱測定
208
209
210
211

ISSP Activity Report 2015

217

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

〃

〃

〃

〃
Specific heat measurements for understanding magnetic
properties of heavy-fermion oxypnictide CeFe1-xCrxPO

〃

〃

111

218

〃

後藤

真人

京都大学

大学院理学研究科〃

Masato Goto

Kyoto University

219

〃

篠原

翔

京都大学

大学院理学研究科〃

Sho Shinohara

Kyoto University

112

No.
220

課題名

氏名

局所的電荷自由度を有するフラストレート系クラ道岡
スター磁性体の強磁場磁化過程

所属

Title

Name

Organization

千城

京都大学

大学院理学研究 High field magnetization of spin frustrating cluster magnets
with local charge fluctuations
科

Chishiro Michioka

Kyoto University

ISSP Activity Report 2015

221

〃

原口

祐哉

京都大学

大学院理学研究
科〃

Yuya Haraguchi

Kyoto University

222

〃

勝間

勇人

京都大学

大学院理学研究
科〃

Hayato Katsuma

Kyoto University

有機／無機スピン系の低温・強磁場中におけるス小野
ピン状態の解明俊雄

大阪府立大学

大学院理学系研 Unraveling the spin states in the low temperature and highmagnetic field region of organic/inorganic spin systems
究科

Toshio Ono

Osaka Prefecture
University

223
224

〃

遠藤

耀司

大阪府立大学

大学院理学系研
究科〃

Youji Endo

Osaka Prefecture
University

225

〃

井川

直哉

大阪府立大学

大学院理学系研
究科〃

Naoya Ikawa

Osaka Prefecture
University

226

〃

笠谷

和宏

大阪府立大学

大学院理学系研
究科〃

Kazuhiro Kasatani

Osaka Prefecture
University

227

〃

奥田

恭平

大阪府立大学

大学院理学系研
究科〃

Kyohei Okuda

Osaka Prefecture
University

228

〃

三宅

陽太

大阪府立大学

大学院理学系研
究科〃

Yota Miyake

Osaka Prefecture
University

229 スピネル FeCr2S1-xSex の高磁場物性

伊藤

昌和

鹿児島大学

大学院理工学研 Magnetic properties of spinel FeCr2S1-xSex in high magnetic
field
究科

Masakazu Ito

Kagoshima University

230

〃

松隈

秀憲

鹿児島大学

大学院理工学研
究科

Hidenori Matsuguma Kagoshima University

231

Valence skipping 超伝導参照物質 (Ca,Sr)FeO3の磁化特性と比熱

伊賀

文俊

茨城大学

理学部

232

〃

菊地

翔弥

茨城大学

大学院理工学研
究科

233

〃

川和

英司

茨城大学

大学院理工学研究科

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

文俊

茨城大学

理学部

和田

徹

茨城大学

大学院理工学研
究科

伊賀

文俊

茨城大学

理学部

234
235

〃

236 高圧合成希土類 12 ホウ化物の磁化特性と比熱〃
Magnetic and thermal properties of valence-skipping
superconductor reference (Ca,Sr)FeO3

Fumitoshi Iga

Ibaraki University〃

Kikuchi Shoya

Ibaraki University〃

Eiji Kawawa

Ibaraki University

Fumitoshi Iga

Ibaraki University〃

Toru Wada

Ibaraki University

Magnetic and thermal properties of rare earth dodeca-borides
produced by high pressure synthesis

Fumitoshi Iga

Ibaraki University

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

No.

課題名

氏名

所属

237

〃

植松

直之

茨城大学

大学院理工学研究科

238 金属ナノ結晶の磁化特性

稲田

貢

関西大学

239

中谷

勇哉

240 金属ナノクラスターネットワークの磁気抵抗測定 稲田
241

Title

〃

Name

Organization

Naoyuki Uematsu

Ibaraki University

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

Mitsuru Inada

Kansai University

関西大学

大学院理工学研
究科

Yuya Nakatani

Kansai University

貢

関西大学

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

Kansai University

三宅

伴季

関西大学

大学院理工学研
究科

Tomoki Miyake

Kansai University242

不純物 Fe 置換 Bi-2212 のパルス強磁場下輸送特
渡辺
性

孝夫

弘前大学

大学院理工学研 Transport properties in Fe doped Bi-2212 under high pulsed
magneticFields
究科

Takao Watanabe

Hirosaki University

243

鉄カルコゲナイド超伝導体薄膜の強磁場下輸送特
前田
性の評価

京剛

東京大学

大学院総合文化 Measurement of transport properties of iron-chalcogenide film
Atutaka Maeda
under ultrahigh magnetic fields
研究科

The University of
Tokyo

〃

〃

〃

〃

244

〃

今井

良宗

東京大学

大学院総合文化研究科〃

Yoshinori Imai

The University of
Tokyo

245

〃

澤田

雄一

東京大学

大学院総合文化研究科〃

Yuichi Sawada

The University ofTokyo

不純物 Fe 置換 Bi-2212 のパルス強磁場下輸送特
臼井
性

友洋

弘前大学

大学院理工学研 Transport properties in Fe doped Bi-2212 under high pulsed
magneticFields
究科

Tomohiro Usui

Hirosaki University

祐基

弘前大学

大学院理工学研
究科〃

Yuki Teramoto

Hirosaki University

静岡大学

理学部

Physical properties at super high magnetic fields in rare earth
intermetallic compounds

Takao Ebihara

Shizuoka University

246

ISSP Activity Report 2015247
担当所員：松田

〃

寺本

康弘

113

248 希土類金属間化合物の超強磁場物性研究

海老原

孝雄

249 キラルフェリ磁性体における磁気キラル二色性

有馬

孝尚

東京大学

大学院新領域創
Magneto-chiral dichroism in a chiral ferrimagnet
成科学研究科Takahisa Arima

The University of
Tokyo

250

〃

阿部

伸行

東京大学

大学院新領域創成科学研究科〃Nobuyuki Abe

The University of
Tokyo

251

〃

豊田

新悟

東京大学

大学院新領域創成科学研究科〃Toyoda Shingo

The University of
Tokyo

252

〃

根津

正謙

東京大学

大学院新領域創成科学研究科〃

Naoaki Netsu

The University of
Tokyo

114

No.

課題名

氏名

所属

Title

Name

ISSP Activity Report 2015

253 CeIr(In1-xCdx)5 の強磁場磁化測定

摂待

力生

新潟大学

理学部

254

〃

角田

竜馬

新潟大学

大学院自然科学研究科

255

横型シングルターンコイルを用いた Cu3Mo2O9の飽和磁場の探索

黒江

晴彦

上智大学

理工学部

Investigation of saturation magnetization in Cu3Mo2O9 using
horizontal single-turn coil system

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

伊賀

文俊

茨城大学

理学部

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

257

小山内

茨城大学

大学院理工学研
究科

岡山大学

〃

湧人

〃

Niigata University

tsunoda ryoma

Niigata University

Haruhiko Kuroe

Sophia University
Ibaraki University
Ibaraki University

大学院自然科学
Field-induced phase transition in O2-N2 mixed solid研究科

Tatsuo Kobayashi

Okayama University

総合科学技術研 Physical properties at super high magnetic fields in rare earth
intermetallic compounds
究科

Jumaeda Jatmika

Shizuoka University

東北大学

大学院工学研究 Investigation on physical properties of FeMn-based shapememory alloys
科

Xiao Xu

Tohoku University

夏野

岡山大学

理学部

小林

259 希土類金属間化合物の超磁場物性研究

ジュマエダ・ジ
静岡大学
ャトミカ

260

〃

Rikio Settai

Yuto Osanai

258 酸素−窒素混合固体における磁場誘起相転移

担当所員：徳永

High-field magnetization of CeIr(In1-xCdx)5Organization

達生

将史

強磁場を利用した FeMn 基形状記憶合金の物性調
キョキョウ
査

261 単体元素半導体 Te の強磁場中の磁気抵抗測定

小林

Magnetoresistance in pulsed magnetic field on semiconducting
Kaya Kobayashi
tellurium

Okayama University

262

ブリージングパイロクロア格子反強磁性体の強磁
岡本
場磁化過程

佳比古

名古屋大学

大学院工学研究 High field magnetization measurements of breathing pyrochlore
Yoshihiko Okamoto
lattice antiferromagnets
科

Nagoya University263

カゴ状物質 SmT2Al20 における磁場に鈍感な強相
東中
関電子物性の起源探索隆二

首都大学東京大学院理工学研 Investigation of field-insensitive nature of heavy-fermion
compounds SmT2Al20
究科

Ryuji Higashinaka

Tokyo Metropolitan
University山田瑛

首都大学東京大学院理工学研
究科〃

Akira Yamada

Tokyo Metropolitan
University

パルス強磁場を用いたグラファイトの磁場誘起秩
矢口
序相の研究

宏

東京理科大学

理工学部

Study of magnetic-field induced phase transitions in graphiteusing pulsed magnetic fields

Hiroshi Yaguchi

Tokyo University of
Science

The high-field magnetization of the heavy fermion compound
YbAgCu4

Hirose Yusuke

Niigata University〃

Tsunoda Ryoma

Niigata University

Magnetostriction in Cu3Mo2O9 under pulsed magnetic field II

Haruhiko Kuroe

Sophia University

264
265

〃

266 重い電子系化合物 YbAgCu4 の強磁場磁化

広瀬

雄介

新潟大学

理学部

267

〃

角田

竜馬

新潟大学

大学院自然科学研究科

268

非破壊パルス・マグネットを用いた Cu3Mo2O9の磁歪測定 II

黒江

晴彦

上智大学

理工学部

No.

課題名

269

Pr1-xSrx(Mn1-yFey)O3 の反強磁性と熱電特性に
関する研究

270

強磁場磁化過程による有機ラジカルー希土類ヘテ
木原 工
ロ錯体の交換相互作用評価

271
272

〃

氏名

ペロブスカイ型酸化物 1-xBiCoO3-xPbTiO3 にお
山本
ける Co3+ 中間スピン状態の確認

Title

Name

Organization

横浜国立大学

大学院工学研究 Antiferromagnetism and thermoelectric properties inPr1-xSrx(Mn1-yFey)O3
院

Hiroshi Nakatsugawa

Yokohama National
University

東北大学

Evaluation of exchange interactions in lanthanoid-radical
金属材料研究所 complexes by magnetization measurements in pulsed highmagnetic fields

Takumi Kihara

Tohoku University

拓哉

電気通信大学

情報理工学研究
科

Takuya Kanetomo

The University
of ElectroCommunications

孟

東京工業大学

応用セラミック Confirmation of intermediate spin state of Co3+ in perovskite
1-xBiCoO3-xPbTiO3.
ス研究所

Hajime Yamamoto

Tokyo Institute ofTechnology

雄介

新潟大学

理学部

High-field magnetization of the new heavy fermion compound
UPd2Cd20

Hirose Yusuke

Niigata University〃

Hiroshi Doto

Niigata University

中津川

金友

所属

博

〃

273 新規重い電子系化合物 UPd2Cd20 の強磁場磁化

廣瀬

274

〃

土塔 寛

新潟大学

大学院自然科学研究科

275

ダイヤモンド型量子スピン鎖 K3Cu3AlO2(SO4)4のパルス強磁場中磁化測定

満田節生

東京理科大学

理学部

Magnetization study on S =1/2 diamond chain system
K3Cu3AlO2(SO4)4 in pulsed high magnetic fields

Setsuo Mitsuda

Tokyo University of
Science276

縦型シングルターンコイルを用いた Cu3Mo2O9の 4 K 以下での磁化測定

黒江

晴彦

上智大学

理工学部

Study of magnetization in Cu3Mo2O9 below 4 K using vertical
single-turn coil system

Haruhiko Kuroe

Sophia University

277

マルチカゴメストリップ（MKS) 格子を持つフラ佐藤ストレート磁性体の強磁場磁化

博彦

中央大学

理工学部

High-field magnetization of the frustrated magnets containing
multi-kagome-strip (MKS) lattice

Hirohiko Sato

Chuo University

大塚

大祐

中央大学

大学院理工学研
究科〃

Daisuke Otsuka

Chuo University

磁気光学測定を用いたハロゲン化金属ペロブスカ
松下
イト型結晶の励起子特性の研究

智紀

東京大学

大学院工学系研 Study on excitonic properties of organometallic lead halide
perovskite using magneto-optical measurement
究科

Tomonori Matsushita

The University of
Tokyo

中村

唯我

東京大学

大学院工学系研
究科

Yuiga Nakamura

The University of
Tokyo

矢口

裕之

埼玉大学

大学院理工学研 Characterization of luminescence properties of atomic layer
doped GaAs with a micro-cavity structure
究科

Hiroyuki Yaguchi

Saitama University

担当所員：嶽山

正二郎

ISSP Activity Report 2015

278
279

〃

280

〃

担当所員：秋山281〃

英文

微小共振器構造を組み合わせた原子層ドープ
GaAs からの発光特性評価

115

282

〃

高宮

健吾

埼玉大学

総合技術支援センター〃

Kengo Takamiya

Saitama University

283

〃

須藤

真樹

埼玉大学

大学院理工学研
究科〃

Masaki Sutou

Saitama University

116

No.

課題名

担当所員：小林

所属

Title

Name

Organization

洋平

ISSP Activity Report 2015284 モードロックレーザー開発
担当所員：辛氏名

東京大学

大学院理学系研
Development of mode-locked lasers
究科

嘉之

大阪大学

大学院生命機能 Electronic structure and its spin polarization of one-dimensional
Yoshiyuki Ohtsubo
bismuth surface layers grown on III-V semiconductor substrates
研究科

Osaka University

潤一郎

大阪大学

大学院理学研究
科

Kishi Junichiro

Osaka University

東京大学

工学部

Takahiro Shimojima

The University of
Tokyo

井手口

拓郎

Takuro Ideguchi

The University of
Tokyo

埴

285

III-V 族半導体基板上に作製したビスマス１次元構造のスピン偏極電子状態

大坪

286

〃

岸

287 鉄系超伝導体の時間分解角度分解光電子分光

下志万

貴博

〃
Time-resolved and angle-resolved photoemission study on theiron-based superconeductors

288

トポロジカル表面バンドを有するビスマス化合物
坂野における超伝導状態の直接観測

昌人

東京大学

大学院工学系研 Direct observation of superconducting state in bismuth
compound with topologically protected surface bands
究科

Masato Sakano

The University of
Tokyo

289

空間反転対称性の破れた物質におけるスピン分極
石坂
の観測

香子

東京大学

大学院工学系研 Observation of spin polarization in inversion-symmetry broken
Kyoko Ishizaka
materials
究科

The University of
Tokyo

290

角度分解光電子分光による鉄系超伝導体における園部
擬ギャップの研究

竜也

東京大学

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

Tatsuya Sonobe

The University of
Tokyo

291

バルク敏感高分解能スピン分解光電子分光を用い横谷
たハーフメタル強磁性体の本質的電子状態の観測

尚睦

岡山大学

Observation of intrinsic electronic states of half-metallic
大学院自然科学ferromagnets studied by bulk-sensitive high-resolution spin研究科
resolved photoemission spectroscopy

Takayoshi Yokoya

Okayama University

藤原

弘和

岡山大学

大学院自然科学研究科

Hirokazu Fujiwara

Okayama University

293 黒リンの非平衡キャリアダイナミクス

木村

昭夫

広島大学

大学院理学研究
Nonequilibrium carrier dynamics in Black Phosphorus
科

Akio Kimura

Hiroshima University

294

〃

頼

燎平

広島大学

大学院理学研究
科

Ryohei Yori

Hiroshima University295

単一 3 次元ディラックコーンを有するディラック陳
半金属の TrARPES

家華

広島大学

大学院理学研究 TrARPES of Dirac semimetals with a single three-dimensional
Dirac cone
科

Chen Jiahua

Hiroshima University296

トポロジカル絶縁体表面の非平衡ダイナミクスの
木村
解明

昭夫

広島大学

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

Akio Kimura

Hiroshima University

Kazuki Sumida

Hiroshima University

292

〃

〃

〃

297

〃

角田

一樹

広島大学

大学院理学研究
科

298

III-V 族半導体基板上に作製したビスマス１次元構造のスピン偏極電子状態２

大坪

嘉之

大阪大学

Electronic structure and its spin polarization of one-dimensional
大学院生命機能
bismuth surface layers grown on III-V semiconductor substrates Yoshiyuki Ohtsubo
研究科
II

〃

Osaka University

No.

課題名

299

〃

担当所員：末元
300

氏名
岸

所属

Title

Name

Organization〃

Kishi Junichiro

Osaka University

Makoto Nakajima

Osaka University〃

Kosaku Kato

Osaka University〃

Shota Kuromiya

Osaka University

大阪大学

大学院生命機能
研究科

誠

大阪大学

レーザーエネル
ギー学研究セン Terahertz spin spectroscopy using metamarials
ター

潤一郎

徹

メタマテリアルを利用したテラヘルツ波スピン分
中嶋
光

レーザーエネル
ギー学研究セン
ター

301

〃

加藤

康作

大阪大学

302

〃

黒宮

章太

大阪大学

レーザーエネル
ギー学研究センター

テラヘルツ分光装置を用いた酸化物磁性材料の研
大越
究

慎一

東京大学

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

Shinichi Ohkoshi

The University of
Tokyo

303

ISSP Activity Report 2015

304

〃

生井

飛鳥

東京大学

大学院理学系研
究科〃

Asuka Namai

The University of
Tokyo

305

〃

吉清

まりえ

東京大学

大学院理学系研
究科〃

Marie Yoshikiyo

The University ofTokyo

306 ペロブスカイト鉛ハライド薄膜の赤外分光

牧野

哲征

福井大学

工学部

Takayuki Makino

University of Fukui

307

山崎

裕斗

福井大学

大学院工学研究
科長

Yuto Yamazaki

University of Fukui

レアメタルフリー磁性材料の磁気異方性発現メカ
小嗣
ニズムの解析

真人

東京理科大学

基礎工学部

Kotsugi Masato

Tokyo University of
Science

Name

Organization〃

担当所員：松田
308

Infrared spectroscopy in perovskite lead halide thin films〃

巌Analysis of magnetic anisotropy of rare-metal-free magnetic
materials

物質合成・評価設備 P クラス / Materials Synthesis and Characterization P Class Researcher
No.
1
2

117

3

課題名

氏名

遷移金属酸窒化物、酸水素化物における構造物性
山浦
研究
〃

真木

所属

Title

淳一

東京工業大学

元素戦略研究セ Study of structural physics on transition metal oxynitrides andJunichi Yamaura
oxyhydrides
ンターTokyo Institute ofTechnology

祥千子

東京工業大学

元素戦略研究センター

Sachiko Maki

Tokyo Institute ofTechnology

名古屋大学

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

Naoyuki Katayama

Nagoya University

電子が複合自由度を持つ遷移金属系物質の純良単片山 尚幸
結晶育成と物性評価

〃

118

No.

課題名

4

〃

氏名
菅原

健人

所属
名古屋大学

大学院工学研究
科

Title

〃

Name
Kento Sugawara

Organization
Nagoya University

ISSP Activity Report 2015

物質合成・評価設備 G クラス / Materials Synthesis and Characterization G Class Researcher
No.
1
2
3

課題名

氏名

高温高圧水中の固体酸・塩基触媒反応の速度論的
大島
解析
〃

秋月

高温高圧水処理における固体触媒反応の速度論的
大島
解析

所属

Title

Name

Organization

義人

東京大学

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

The University of
Tokyo

信

東京大学

大学院新領域創成科学研究科

Makoto Akizuki

The University of
Tokyo

義人

東京大学

大学院新領域創 Kinetic analysis of solid catalyzed reactions in sub- andsupercritical water
成科学研究科Yoshito Oshima

The University ofTokyo

Hiroki Inoue

The University of
Tokyo

〃

4

〃

井上

拓紀

東京大学

大学院新領域創成科学研究科5

高温高圧水を反応場とした多段階有機合成反応

大島

義人

東京大学

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

The University of
Tokyo

6

〃

中井

佑輔

東京大学

大学院新領域創成科学研究科yusuke nakai

The University of
Tokyo

順一郎

東京大学

大学院新領域創 Development of electro-catalysts and kinetics analysis forelectrolysis using proton conducting fuel cells
成科学研究科

Junichiro Otomo

The University of
Tokyo

文彦

東京大学

大学院新領域創成科学研究科

Fumihiko Kosaka

The University of
Tokyo

順一郎

東京大学

Material synthesis of hetero junction layers using mixed ion
大学院新領域創
conductors and analysis of transport phenomenon of its
成科学研究科interface

Junichiro Otomo

The University of
Tokyo

修平

東京大学

大学院新領域創成科学研究科Shuhei Mastuoka

The University of
Tokyo

順一郎

東京大学

大学院新領域創 Electrochemical Synthesis and Kinetic Analysis of Ammonia
using Proton Conducting Solid Electrolyte
成科学研究科

Junichiro Otomo

The University of
Tokyo

中村

剛久

東京大学

大学院新領域創成科学研究科

Takehisa Nakamura

The University ofTokyo

超臨界水を利用した有機無機混合廃棄物の処理と大島
金属化合物のリサイクル

義人

東京大学

大学院新領域創 Decomposing mixtures of organic and inorganic waste andrecycling metal compounds using supercritical water
成科学研究科Yoshito Oshima

The University of
Tokyo

駿

東京大学

大学院新領域創成科学研究科

Masukawa Shun

The University of
Tokyo

7
8
9
10
11
12
13
14

プロトン伝導性電解質を用いた電解合成反応にお大友ける触媒開発と速度論的解析〃

高坂

イオン - 電子混合伝導体を用いた異相界面接合体
大友の作製及び 界面輸送現象の解析〃

松岡

プロトン伝導性固体電解質を用いたアンモニア電大友
解合成と速度論解析
〃

〃

升川

〃

〃

〃

〃

〃

〃

No.

課題名

氏名

所属

Title

Name

Organization

15 固体酸化物型燃料電池のカチオン拡散現象の検討 大友

順一郎

東京大学

大学院新領域創Study of cation diffusion of solid oxide fuel cell
成科学研究科

Junichiro Otomo

The University of
Tokyo

16

岡村

晋太郎

東京大学

大学院新領域創成科学研究科

Shintaro Okamura

The University ofTokyo

固体酸化物形燃料電池の電極 / 電解質界面におけ大友るカチオン拡散現象評価

順一郎

東京大学

大学院新領域創 Evaluation of cation diffusion in the electrode/electrolyte
interface of solid oxide fuel cell
成科学研究科

Junichiro Otomo

The University of
Tokyo

直人

東京大学

大学院新領域創成科学研究科

Naoto Hashikita

The University of
Tokyo

順一郎

東京大学

大学院新領域創 Material design and development of catalyst for ITFC using
proton conductor
成科学研究科

Junichiro Otomo

The University of
Tokyo

元

東京大学

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

順一郎

東京大学

Evaluation of long term stability and reduction kinetics of metal
大学院新領域創
oxides supported on perovskite oxides as oxygen carriers in
Junichiro Otomo
成科学研究科
chemical looping systems

The University of
Tokyo

東京大学

大学院新領域創成科学研究科The University of
Tokyo

順一郎

東京大学

大学院新領域創 Development of air battery with redox reaction of metal oxide
Junichiro Otomo
in molten salt
成科学研究科The University of
Tokyo

月村

玲菜

東京大学

大学院新領域創成科学研究科

Reina Tsukimura

The University ofTokyo

高温高圧水を用いた廃太陽電池からの無機有価物
布浦
の回収

鉄兵

東京大学

環境安全研究セ Hydrothermal treatment of waste solar panels for recovery of
inorganic materials
ンター

Teppei Nunoura

The University ofTokyo

Hiroaki Tsushima

The University of
Tokyo

17
18
19
20
21
22
23
24

ISSP Activity Report 2015

25

〃

〃

橋北

ITFC におけるプロトン伝導体の材料設計および
大友
触媒開発
〃

小城

ぺロブスカイト型酸化物を用いたケミカルルーピ
大友
ングシステムの開発
〃

オーチェン
ジェームズ
オーチェン

溶融塩中金属酸化物還元を利用した空気電池の開
大友
発
〃

〃

〃

〃

〃

〃

Ochieng James
Ochieng

119

26

〃

對馬

宏明

東京大学

大学院新領域創成科学研究科27

高温高圧水を利用した微粒子の in situ 有機修飾
技術の開発

大島

義人

東京大学

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

28

〃

岳

東京大学

大学院新領域創成科学研究科Lei Yue

The University of
Tokyo

東京大学

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

The University of
Tokyo

栞

東京大学

大学院新領域創成科学研究科

Shiori Sasaki

The University of
Tokyo

順一郎

東京大学

大学院新領域創 Development of oxygen carrier composite particles with highactivity in a chemical loop method
成科学研究科

Junichiro Otomo

The University of
Tokyo

磊

29 高温高圧水を反応場とした層状固体触媒反応

大島

30

佐々木

31

〃

ケミカルループ法における高活性酸素キャリア複大友合粒子の開発

義人

〃

〃

〃

120

No.

課題名

32

〃

氏名

所属

Title

Name

Organization〃

Kazuyuki MiyaThe University of
Tokyo

ISSP Activity Report 2015

味谷

和之

東京大学

大学院新領域創成科学研究科

超臨界水熱法による酸化物ナノ粒子の合成と構造
大島
解析

義人

東京大学

大学院新領域創 Structure analysis of metal oxide nanoparticles synthesizedunder supercritical water
成科学研究科Yoshito Oshima

The University of
Tokyo

東京大学

大学院新領域創成科学研究科

Akira Yoko

The University of
Tokyo

順一郎

東京大学

大学院新領域創 Degradation of oxygen carrier materials in chemical loop
systems
成科学研究科

Junichiro Otomo

The University of
Tokyo

斉藤

佑耶

東京大学

大学院新領域創成科学研究科Yuya Saito

The University ofTokyo

37 複合酸化物ナノ粒子の超臨界水熱合成手法の検討 大島

義人

東京大学

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

The University of
Tokyo

38

加藤

進介

東京大学

大学院新領域創成科学研究科

Shinsuke KatoThe University ofTokyo

39 超臨界水による担持金属酸化物微粒子の合成

大島

義人

東京大学

大学院新領域創 Preparation of fine metal oxide particles on the surface of
supports using supercritical water
成科学研究科Yoshito Oshima

The University of
Tokyo

40

李

東京大学

大学院新領域創成科学研究科Li Mengting

The University of
Tokyo

岳彦

東京大学

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

Takehiko Sasaki

The University ofTokyo

Etty Nurlia
Kusumawati

東京大学

大学院理学系研
究科

Etty Nurlia
Kusumawati

The University of
Tokyo

浩明

京都大学

大学院理学研究 characterization of magnetic anisotropy of transition metalcompounds with a triangular lattice科

Hiroaki Ueda

Kyoto University

33
34
35
36

41
42
43

〃

横

哲

ケミカルループ法における酸素キャリア材料の劣大友化挙動の観察〃〃〃夢婷

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

三角格子をもつ遷移金属化合物の磁気異方性の評
植田
価

〃

〃

〃

〃

〃

44

〃

後藤

真人

京都大学

大学院理学研究科〃

Masato Goto

Kyoto University

45

〃

谷奥

泰明

京都大学

大学院理学研究
科〃

Yasuaki Tanioku

Kyoto University

46 正 20 面体クラスター固体の電気伝導と磁性

木村

薫

東京大学

大学院新領域創 Electrical conductivity and magnetic properties of Icosahedral
Kaoru Kimuracluster solids
成科学研究科The University of
Tokyo

47

廣戸

孝信

東京大学

大学院新領域創成科学研究科Takanobu Hiroto

The University of
Tokyo

東北大学

金属材料研究所

UV-visible spectrophotometry of an electron-proton correlated
Tajahiko Sasaki
single-component molecular conductor with ferroelectricity

Tohoku University48〃

強誘電性を示す電子 - プロトン相関系単一分子性
佐々木
導体の顕微紫外可視分光測定

孝彦

〃

No.

課題名

49

〃

氏名
伊藤

桂介

東京大学

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

山口大学

大学院理工学研
Evaluation of micro-texture and crystallinity of natural minerals Mariko Nagashima
究科

永嶌

岳彦

51 天然鉱物の微細組織と結晶性の実態

〃

Name

金属材料研究所佐々木

マイクロミキサを用いた機能性酸化物ナノ粒子の
陶
連続合成

Title

東北大学

50 触媒反応の insitu ラマン散乱測定

52

所属

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

究

Organization

Keisuke Ito

Tohoku University

Takehiko Sasaki

The University ofTokyo

Kiwamu Sue

Yamaguchi University
AIST

齋藤

哲治

千葉工業大学

工学部

Microstructural studies of newly developed permanent magnet
Tetsuji Saito
materials

Chiba Institute ofTechnology

54

透過型電子顕微鏡による機能性金属錯体の歪み測
糸井
定

充穂

日本大学

医学部

Distortion measurement for multifunctional metal complex bytransmission electron microscope

Miho Itoi

Nihon University

55

アーク加熱風洞を用いた宇宙往還機の熱防御シス
桃沢
テム (TPS) の動的酸化に関する研究

愛

東京都市大学

工学部

Dynamic oxidation of thermal protection system using archeater

Ai Momozawa

Tokyo City University

佐野

宗一郎

東京大学

大学院工学系研
究科

Soichiro Sano

The University of
Tokyo

小林

夏野

岡山大学

理学部

ラーベス相化合物 YbM2 (M = 後期遷移金属 ) の白子
電子物性測定雄一

名古屋大学

大学院工学研究 Measurements for electric properties of Laves phasecompounds YbM2 (M = late transition metals)
科

Yuichi Shirako

Nagoya University

雄太

名古屋大学

大学院工学研究
科

Yuta Saito

Nagoya University

正

名古屋大学

大学院工学研究 Electronic and magnetic properties of novel transition metalsulfide solid solutions科

Masashi Hasegawa

Nagoya University

貴弘

名古屋大学

大学院工学研究
科

Takahiro Akita

Nagoya University

出

鹿児島大学

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

Kagoshima University

重松

理史

鹿児島大学

大学院理工学研
究科

Satoshi Shigematsu

Kagoshima University

64 スピネル硫化物の磁気的性質

岡本

佳比古

名古屋大学

大学院工学研究
Magnetic properties of spinel sulfides
科

Yoshihiko Okamoto

Nagoya University

65 ホイスラー型化合物の磁性と伝導の研究

廣井

政彦

鹿児島大学

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

Masahiko Hiroi

Kagoshima University

53 新規磁石材料の微細構造解析

56〃

57 単体元素半導体 Te の弱磁場磁気抵抗測定
58

ISSP Activity Report 2015

59

〃

齋藤

60 新規遷移金属硫化物固溶体の電子・磁気物性

長谷川

61

秋田

62
63

〃

ハーフメタル型ホイスラー合金の磁性と輸送特性
重田に関する研究〃〃Magnetoresistance on semiconducting Te in low magnetic field Kaya Kobayashi

〃

〃

〃

Okayama University

121

122

No.

課題名

66

〃

氏名

所属

ISSP Activity Report 2015

田底

知也

鹿児島大学

大学院理工学研
究科

67 梯子型鉄系化合物の元素置換効果

大串

研也

東北大学

68 新規 5d 遷移金属化合物の探索

有馬

孝尚

69

〃

徳永

70

〃

71

Title

〃

Name

Organization

Tomoya Tazoko

Kagoshima University

大学院理学研究
Substitution effect on Fe-based ladder compounds
科

Kenya Ohgushi

Tohoku University

東京大学

大学院新領域創
Exploration of new 5d transition metal compounds
成科学研究科Takahisa Arima

The University of
Tokyo

祐介

東京大学

大学院新領域創成科学研究科〃

Yusuke Tokunaga

The University of
Tokyo

阿部

伸行

東京大学

大学院新領域創成科学研究科〃

Shingo Toyoda

The University of
Tokyo

〃

豊田

新悟

東京大学

大学院新領域創成科学研究科〃

Shingo Toyoda

The University of
Tokyo

72

〃

松浦

慧介

東京大学

大学院新領域創成科学研究科〃

Keisuke Matsuura

The University of
Tokyo

73

〃

根津

正謙

東京大学

大学院新領域創成科学研究科〃

Netsu Naoaki

The University of
Tokyo

74

〃

鷲見

浩樹

東京大学

大学院新領域創成科学研究科〃

HirokiThe University of
Tokyo

75

〃

前島

夏奈

東京大学

大学院新領域創成科学研究科〃

Kana Maeshima

The University of
Tokyo

76

〃

藤間

友理

東京大学

大学院新領域創成科学研究科〃Yuri Fujimiya

The University of
Tokyo

真帆人

横浜国立大学

大学院工学研究 Precipitation behavior and magnetic properties of fine magnetic
Mahoto Takeda
particles in single crystals of Cu ‐ Ni base alloys
院

Yokohama National
University

横浜国立大学

大学院工学府〃Kim Junseop

Yokohama National
University

横浜国立大学

大学院工学府〃

Hibiki Sakakura

Yokohama National
University

77

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

78

〃

金

79

〃

坂倉

俊燮
響

Sumi

物質合成・評価設備 U クラス / Materials Synthesis and Characterization U Class Researcher
No.
1

課題名

氏名

超臨界流体中の表面バリア放電プラズマによるア
シュタウス
モルファスカーボンおよびダイヤモンドライクカ
スヴェン
ーボンのナノコーティング

所属
東京大学

Title

Name

Fabrication of amorphous and diamond-like carbon
大学院新領域創
nanocoatings by surface dielectric barrier discharges generated Sven Stauss
成科学研究科
in supercritical fluids

Organization
The University of
Tokyo

No.

課題名

氏名

2

SEM による KAGRA 重力波検出器用超低損失ミ
ラーのコンタミネーションスタディー

廣瀬

3

〃

長谷川

榮一

9

核−マントル間の塩素分配に関する実験的研究

The University of
Tokyo

東京大学

大学院新領域創Control of Graphene Optical Spectrum in Terahertz region
成科学研究科

東京学芸大学

自然科学系

東京学芸大学

自然科学系

伸一

東京大学

中村

高道

桑原

秀治

孝憲

佐々木 友彰

自己組織化現象を用いたガスセンシングデバイス
割澤の作成に関する研究（仮）〃A contamination study of ultra-low loss mirrors for the KAGRA
Eiichi Hirose
gravitational wave detector using SEM

宇宙線研究所

アルミ系近似結晶中の正 20 面体クラスターの金
金沢 育三
属結合−共有結合転換

8Organization

東京大学

邦彦

5

7

Name

宇宙線研究所

グラフェンのテラヘルツ光領域における光吸収ス
松木
ペクトルの制御

〃

Title

東京大学

4

6

所属

〃

Kunihiko Hasegawa

The University of
Tokyo

Takanori Matsuki

The University of
Tokyo

Metallic-covalent bonding conversion of icosahedral cluster in
Ikuzo Kanazawa
Al-based approximant crystals

Tokyo Gakugei
University

Tomoaki Sasaki

Tokyo Gakugei
University

大学院新領域創 Study on the creation of the gas sensing device using a selforganizing phenomenon (provisional)
成科学研究科

Shinichi Warisawa

The University of
Tokyo

東京大学

大学院新領域創成科学研究科

Takamichi Nakamura

The University of
Tokyo

東京大学

大学院新領域創
Chlorine partitioning between earth’ s core and mantle
成科学研究科

Hideharu Kuwahara

The University of
Tokyo

〃

〃

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

ISSP Activity Report 2015

1

課題名

氏名

中性子回折実験用高圧セル装置の開発と、水素結飯塚合を持つ化合物の高温高圧下その場観察

理子

所属
愛媛大学

Title

地球深部ダイナ
Development of high-pressure cell for neutron diffraction andミクス研究セン
in-situ observation of hydrogen-bonding materials
ター

Name
Riko Iizuka

Organization
Ehime University

短期留学研究員 / Short term Young Researcher
No.
1

課題名
第一原理におけるゼーベック係数の計算

氏名
高 成柱

所属
大阪大学

Title

基礎工学研究科 Seebeck coefficient calculation from first-principle

Name
Ko Sonjy

Organization
Osaka University

123

124

平成 27 年度 中性子科学研究施設
No.

課題名

共同利用課題一覧 / Joint Research List of Neutron Scattering Researcher 2015

氏名

所属

Title

Name

Organization

ISSP Activity Report 2015

・申請装置 4G: GPTAS
卓

東北大学

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

次世代ナトリウムイオン電池電解質溶液の構造解
亀田
析

恭男

山形大学

理学部

3

Dy3Al5O12 ガーネットにおけるクーロン相の探
索

卓

東北大学

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

4

時間分割中性子散乱測定による磁気構造変化過程
元屋の実時間追跡清一郎

東京理科大学

理工学部

5

中性子回折法による六方晶フェライト
Ba2Zn2Fe12O22 および BaFe12O19 の超交換相互 内海
作用の研究

重宜

諏訪東京理科大
工学部
学

6

パイロクロア磁性体における格子ー軌道ースピン
古川
観測とスピン流、異常 ホール効果への影響

はづき

7

強磁性超伝導体における磁性と超伝導の研究

古川

8

Sr2Ruo4 の非弾性散乱9Fe 系超伝導体の磁性と超伝導の研究

10

CeRhIn5 の圧力下中性子回折実験による磁性と超小林伝導の相関の研究

1

GPTAS（汎用 3 軸中性子分光器）IRT 課題2

11 YbCo2Zn20 における圧力誘起磁気秩序相の研究佐藤佐藤Taku J Sato

Structure of electrolyte solutions for novel sodium ion batteries Yasuo Kameda
Taku J Sato

Tohoku University
Yamagata University
Tohoku University

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

Tokyo University of
Science

Study on superexchange interaction of Ba2Zn2Fe12O22 andBaFe12O19 systems by neutron diffraction

Shigenori Utsumi

Tokyo University of
Science, Suwa

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

Hazuki Furukawa

Ochanomizu University

はづき

お茶の水女子大 大学院人間文化
A study of magnetic state in ferromagnetic superconductors.
学
創成科学研究科

Hazuki Furukawa

Ochanomizu University

古川

はづき

お茶の水女子大 大学院人間文化
Inelastic neutron scattering experiments on Sr2RuO4
学
創成科学研究科

Hazuki Furukawa

Ochanomizu University

古川

はづき

お茶の水女子大 大学院人間文化
A study of magnetic state on Fe-based superconductors
学
創成科学研究科

Hazuki Furukawa

Ochanomizu University

理気

東京大学

物性研究所

Neutron diffraction study on CeRhIn5 under pressure

Riki Kobayashi

The University of
Tokyo

和幸

東京大学

物性研究所

Pressure-induced magnetic phase transition in YbCo2Zn20

KazuyukiMatsubayashi

The University ofTokyo

Effect of uniaxial stress on hidden order state in heavy-fermion
Makoto Yokoyama
compounds

松林

12

重い電子系化合物の隠れた秩序状態に対する一軸
横山
応力効果

淳

茨城大学

理学部理学科13

シャンダイト型遷移金属化合物 Co3Sn2-xInxS2 に田畑
おけるカイラル秩序

吉計

京都大学

大学院工学研究 Chiral order of shandite-type transition-metal compound
Co3Sn2-xInxS2
科

Yoshikazu Tabata

Kyoto University

Ibaraki University

14 EuRu2P2 の磁気構造解析

藤原

哲也

山口大学

大学院理工学研
Magnetic structure analysis of EuRu2P2
究科

Tetsuya Fujiwara

Yamaguchi University

15 EuCo2P2 の磁気構造解析

藤原

哲也

山口大学

大学院理工学研
Magnetic structure analysis of EuCo2P2
究科

Tetsuya Fujiwara

Yamaguchi University

No.
16

課題名

氏名

門脇

18 ホールドープ型鉄系超伝導体のスピン揺動

李

Title

Name

Organization

宏武

山口大学

教育学部

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

Hirotake Shigematsu Yamaguchi University

広明

首都大学東京理工学研究科

Topological phase transition in spin ice

Hiroaki Kadowaki

Tokyo Metoropolitan
University

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

Chul-Ho Lee

AISTTakatsugu Masuda

The University ofTokyo

Takehito Nakano

Osaka University

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

17 スピンアイスにおけるトポロジカル相転移所属

哲虎・申請装置 5G: PONTA

ISSP Activity Report 201519 PONTA（高性能偏極中性子散乱装置）IRT 課題 益田

隆嗣

東京大学

物性研究所

20

中性子回折によるアルカリ金属ナノクラスター強中野
磁性体の研究岳仁

大阪大学

大学院理学研究 Neutron diffraction study on ferromagnetism of alkali-metal
nanoclusters arrayed in zeolite crystal
科物

21

時間分割中性子散乱測定による磁気構造変化過程
元屋の実時間追跡清一郎

東京理科大学

理工学部

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

Tokyo University of
Science22

マルチフェロイックス Ba2CoGe2O7 におけるエレクトロマグノンの偏極解析

左右田

稔

東京大学

物性研究所

Polarization analyses of electromagnon in multiferroics
Ba2CoGe2O7

Minoru Soda

The University of
Tokyo

23

マルチフェロイック Ca2CoSi2O7 の磁場下におけ
左右田
る新規磁気相

稔

東京大学

物性研究所

Non-trivial magnetic phase induced by magnetic field in
Ca2CoSi2O7

Minoru Soda

The University of
Tokyo

24

鉄系超伝導体のネマティック相の起源 - 偏極中性
池内
子散乱 -

和彦

総合科学研究機 東海事業センタ Polarized neutron study of the nematic state in Fe-based
superconductor
構ーKazuhiko Ikeuchi

CROSS

25

偏極中性子散乱による LaCo0.8Rh0.2O3 の新奇な浅井
強磁性磁気秩序の研究

晋一郎

東京大学

物性研究所

Polarized neutron diffraction study on a novel type offerromagnetic order in LaCo0.8Rh0.2O3

Shinichiro Asai

The University of
Tokyo

26

スピン格子結合系における磁気相転移と電気分極
満田の一軸応力制御節生

東京理科大学

理学部

Uniaxial-stress control of magnetic phase transition and electric
Setsuo Mitsuda
polarization in a spin-lattice coupled system

Tokyo University of
Science27

Magnetic structures of 1D frustrated chain
compound NaCuMoO4(OH)

益田

隆嗣

東京大学

物性研究所

Magnetic structures of 1D frustrated chain compound
NaCuMoO4(OH)

Takatsugu Masuda

The University of
Tokyo

28

カイラル磁性体 CsCuCl3 のカイラルらせん磁気
構造の検出

高阪

勇輔

広島大学

大学院理学研究 Chiral helimagnetic structure in chiral inorganic compound
CsCuCl3科

Yusuke Kousaka

Hiroshima University

29

URu2Si2 の隠れた秩序に伴う多重極秩序の直接観
高阪
測

勇輔

広島大学

大学院理学研究 Direct observation of the “Hidden Order” due to multipole
ordering in URu2Si2科

Yusuke Kousaka

Hiroshima University

正司

物質・材料研究 中性子散乱グル
Determination of the magnetic structure of Cu2.85Zn0.15Mo2O9 Masashi Hase
機構
ープ

NIMS

東北大学

The University ofTokyo

30 Cu2.85Zn0.15Mo2O9 の磁気構造の決定

125

31

長谷

PONTA IRT 課題 偏極中性子線を用いた磁気散
林
乱中性子線ホログラフィー

好一

IRT: PONTA (Polarized Neutron Triple Axis Spectrometer)

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

Kouichi Hayashi

126

No.

課題名

氏名

所属

Title

Name

Organization

・申請装置 6G: TOPAN

ISSP Activity Report 2015

32

TOPAN（東北大理：３軸型偏極中性子分光器）
岩佐
IRT 課題和晃

東北大学

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

Tohoku University

33

PrT2Zn20 (T = Ru, Rh, Os, Ir) における２チャン
岩佐
ネル近藤効果和晃

東北大学

大学院理学研究
Two-channel Kondo effect in PrT2Zn20 (T = Ru, Rh, Os, Ir)
科

Kazuaki Iwasa

Tohoku University34

全対称型多極子秩序による金属−非金属転移に対岩佐する磁気不純物効果

和晃

東北大学

大学院理学研究 Magnetic impurity effect on the metal-nonmetal transition
associated with totally-symmetric electron multipole ordering
科

Kazuaki Iwasa

Tohoku University

35

Ce3T4Sn13 (T = Co, Rh) における磁気励起で見出す二重ギャップ電子状態

岩佐

和晃

東北大学

大学院理学研究 Double-gap electronic state evidenced from magnetic excitation
Kazuaki Iwasa
in Ce3T4Sn13 (T = Co, Rh)
科

Tohoku University36

質量勾配をもつ非一様系での偏在的原子振動モー
岩佐ドであるグレードンの検証

和晃

東北大学

大学院理学研究 Gradon as a localized atomic motion in mass-graded
inhomogeneous systems
科

Kazuaki Iwasa

Tohoku University37

遍歴電子反強磁性体 Mn3Si における動的スピン階層構造の研究平賀晴弘

高エネルギー加 物質構造科学研 Study on dynamical spin hierarchy structure in itinerantelectron antiferromagnet Mn3Si
速器研究機構究所

Haruhiro Hiraka

KEK

38

LiFeAs の格子振動にみられる軌道自由度の効果
池内
の観測

和彦

総合科学研究機 東海事業センタ
Orbital effect on lattice vibrations in LiFeAs
構ーKazuhiko Ikeuchi

CROSS

39

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

全基

東北大学

金属材料研究所

Study of spin correlations in novel T’ -structured cuprate oxide
Masaki Fujita
Pr2-xCaxCuO4

Tohoku University

40 新規スピンラダー系 BiCu2PO6 の磁気相関の研究 藤田

全基

東北大学

金属材料研究所

Study of magnetic correlations in novel spin-ladder system
BiCu2PO6

Masaki Fujita

Tohoku University

Al 置換した La214 系銅酸化物高温超伝導体のス
鈴木
トライプ秩序と超伝導の研究

謙介

東北大学

金属材料研究所

Study of Al-induced stripe order and superconductivity in Alsubstituted La-214 cuprate

Kensuke Suzuki

Tohoku University

淳

茨城大学

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

Makoto Yokoyama

Ibaraki University

南部

雄亮

東北大学

多元物質科学研
Spin dynamics of the iron-based ladder compound BaFe2Se3
究所

Yusuke Nambu

Tohoku University

44

PrT2Zn20 (T = Ru, Rh, Os, Ir) における２チャン
岩佐
ネル近藤効果和晃

東北大学

大学院理学研究
Two-channel Kondo effect in PrT2Zn20 (T = Ru, Rh, Os, Ir)
科

Kazuaki Iwasa

Tohoku University45

全対称型多極子秩序による金属−非金属転移に対岩佐する磁気不純物効果

和晃

東北大学

大学院理学研究 Magnetic impurity effect on the metal-nonmetal transition
associated with totally-symmetric electron multipole ordering
科

Kazuaki Iwasa

Tohoku University

46

Ce3T4Sn13 (T = Co, Rh) における磁気励起で見出す二重ギャップ電子状態

和晃

東北大学

大学院理学研究 Double-gap electronic state evidenced from magnetic excitation
Kazuaki Iwasa
in Ce3T4Sn13 (T = Co, Rh)
科

Tohoku University

41

・申請装置 C1-1: HER
42

HER（高エネルギー分解能 3 軸型中性子分光器）
横山
IRT 課題43 鉄系梯子型物質 BaFe2Se3 の磁気陽動

岩佐

No.

課題名

氏名

47

DyFe2Zn20 における磁気異方性増強を伴う逐次
磁気相転移

48

Ca2CoSi2O7 におけるエレクトロマグノンとスピ
左右田
ン・ネマティック相互作用49

マルチフェロイックス Ba2CoGe2O7 における磁気異方性の電場制御

50

スピン格子結合系 CuFeO2 のスピン波分散関係の満田
一軸応力変化

51

擬スピン 1/2 ブリージングパイロクロア磁性体
Ba3Yb2Zn5O11 の非弾性中性子散乱研究

52

所属

Title

Name

Organization

東北大学

大学院理学研究 Successive magnetic phase transition with enhancement inmagnetic anisotropy of DyFe2Zn20
科

Kazuaki Iwasa

Tohoku University

稔

東京大学

物性研究所

Electromagnon and spin-nematic interaction in Ca2CoSi2O7

Minoru Soda

The University of
Tokyo

稔

東京大学

物性研究所

Electric control of magnetic anisotropy in Ba2CoGe2O7

Minoru Soda

The University of
Tokyo

節生

東京理科大学

理学部

Spin wave dispersion relation in a spin-lattice coupled system
CuFeO2 ander uniaxial stressSetsuo Mitsuda

Tokyo University of
Science

益田

隆嗣

東京大学

物性研究所

Magnetic excitation of S = 1/2 breathing pyrochlore compound
Takatsugu Masuda
Ba3Yb2Zn5O11

The University ofTokyo

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

全基

東北大学

金属材料研究所

Study of spin correlations in novel T’ -structured cuprate oxide
Masaki Fujita
Pr2-xCaxCuO4

Tohoku University

岩佐

和晃

左右田

ISSP Activity Report 2015

53 量子スピン液体の研究

門脇広明

首都大学東京理工学研究科

Quantum spin liquid

Hiroaki Kadowaki

Tokyo Metoropolitan
University

54 量子臨界点近傍にある YbCo2Zn20 の磁気励起

阿曽

尚文

琉球大学

理学部

Magnetic excitations in YbCo2Zn20 in vicinity of a quantum
critical point

Naofumi Aso

University of the
Ryukyus55

空間反転対称性をもたない超伝導体 CeRhSi3 の
磁気励起

阿曽

尚文

琉球大学

理学部

Magnetic fluctuations in a non-centrosymmetric superconductor
Naofumi Aso
CeRhSi3

University of the
Ryukyus56

4d 局在電子系 La5Mo4O16 における構造及び磁気飯田
相転移の温度依存性の詳細な測定

一樹

総合科学研究機利用促進部
構

Detailed measurements of temperature dependences ofstructural and magnetic phase transitions in localized 4delectrons system La5Mo4O16

Kazuki Iida

CROSS

Chul-Ho Lee

AIST

57 ホールドープ型鉄系超伝導体のスピン揺動58

李カゴメ三角格子反強磁性体 NaBa2Mn3F11 の磁気
益田
状態

哲虎

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

隆嗣

東京大学

物性研究所

Magnetic state in Kagome-Triangular lattice antiferromagnet
NaBa2Mn3F11

Takatsugu Masuda

The University of
Tokyo

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

Mitsuhiro Shibayama

The University ofTokyo・申請装置 C1-2: SANS-U

127

59

SANS-U（二次元位置測定小角散乱装置）IRT 課
柴山
題

充弘

東京大学

物性研究所

60

プロパノール + イミダゾリウム系イオン液体二成
下村
分溶液の相分離メカニズムの解明

拓也

室蘭工業大学

大学院工学研究 Phase separation of propanol+imidazolium-based ionic liquidbinary solutions
科

Takuya Shimomura

Muroran Institute ofTechnology

61

イミダゾリウム系イオン液体とグライムの混合状
下村
態

拓也

室蘭工業大学

大学院工学研究
Mixing state of imidazolium-based ionic liquid+glyme solutions Takuya Shimomura
科

Muroran Institute ofTechnology

実

富山大学

大学院医学薬学
Structure and stacking behavior of nanodiscs
研究部

University of Toyama

62 ナノディスクの構造と集積化挙動の評価

中野

Minoru Nakano

128

No.

ISSP Activity Report 2015

課題名

氏名

63 膜貫通ペプチドのフリップフロップ誘起能の評価 中野

実

富山大学

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

Minoru Nakano

University of Toyama

64 膜脂質のダイナミクスに及ぼす膜の曲率の評価

実

富山大学

大学院医学薬学
Effects of curvature on dynamics of membrane lipids
研究部

Minoru Nakano

University of Toyama

中野

所属

Title

Name

Organization65

小角中性子散乱によるα - クリスタリンのサブユ
井上
ニット交換

倫太郎

京都大学

原子炉実験所Subunit exchange in alpha crystallin as studied by small angle
Rintaro Inoueneutron scattering

Kyoto University66

放射線誘起反応に基づく機能性高分子多孔ゲルの佐藤
合成と中性子小角散乱法による構造解析

信浩

京都大学

原子炉実験所SANS analysis of radiation-fabricated advanced porous polymer
Nobuhiro Satogels

Kyoto University

南部

雄亮

東北大学

多元物質科学研
Current driven motion of skyrmions in MnSi究所

67 MnSi における磁気スキルミオンの電流駆動

Yusuke Nambu

Tohoku University

68

中性子小角散乱実験による Sr2RuO4 の異常金属
状態の研究

古川

はづき

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

Hazuki Furukawa

Ochanomizu University69

空間反転対称性の破れた超伝導体のヘリカル磁束
古川
格子の観測

はづき

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

Ochanomizu University

古川

はづき

お茶の水女子大 大学院人間文化
Vortex study on Fe-based superconductors
学
創成科学研究科

Hazuki Furukawa

Ochanomizu University

70 Fe 系超伝導体の磁束研究
71

希釈冷凍機温度領域における CeCoIn5 の磁束構
造の磁場方向依存性古川

はづき

お茶の水女子大 大学院人間文化 Field direction dependence of vortex lattice structure on
学
創成科学研究科 CeCoIN5 in Dilution temperature

Hazuki Furukawa

Ochanomizu University72

強磁性超伝導体における自発的磁束格子構造の研
古川
究

はづき

お茶の水女子大 大学院人間文化
Spontaneous vortex phase in ferromagnetic superconductors
学
創成科学研究科

Hazuki Furukawa

Ochanomizu University

73

イオン液体中に閉じ込められた水の” 疑似シャペ
吉田ロン” 効果亨次

福岡大学

Koji Yoshida

Fukuoka University

74

HPT 加工により発現する純鉄中の特異な磁気構
造の解明

洋次郎

京都大学

75

金属磁性体 MnP における長周期ドメイン磁気構
山崎
造の観測

照夫

東京理科大学76

GM1 含有 Bicelle に結合したタンパク質の構造変
杉山
化

正明

77 全イオン性高分子ミセルのナノ構造と刺激応答
78

大場

松岡

高分子量成分の制御による高い耐熱性・耐久性を松葉
持つセパレータ開発のための基礎研究

79 電場印加時のゲル内での DNA の構造解析

柴山

理学部

Pseudo-chaperone effect of confined water in ionic liquids

Characterization of unusual magnetic scattering in reproduced
Yojiro Oba
by high-pressure torsion straining

Kyoto University

理工学部

Observation of the long period magnetic domain structure inmetallic helimagnet MnP

Teruo Yamazaki

Tokyo University of
Science

京都大学

原子炉実験所

Structural change of protein connecting to Bicelle with GM1

Masaaki Sugiyama

Kyoto University

秀樹

京都大学

工学研究科

Nanostructure and stimuli-sensitivity of totally ionic block
copolymer micelles.

Hideki Matsuoka

Kyoto University

豪

山形大学

大学院理工学研 Observation of structure of high-molecular weight component
for high-performance separator
究科

Go Matsuba

Yamagata University

充弘

東京大学

物性研究所

Mitsuhiro Shibayama

The University ofTokyo

Investigation of DNA structure in polymer gels under electric
field

No.

課題名

80 毛髪の内部構造解析

氏名

所属

Title

Name

Organization

柴山

充弘

東京大学

物性研究所

Mesoscopic structural analysis of hair

Mitsuhiro Shibayama

The University of
Tokyo

81

オブアルブミンの凝集過程における N 末端の両親媒性部位の効果

柴山

充弘

東京大学

物性研究所

Effect of N-terminal amphiphilic region on aggregation ofovalbumin

Mitsuhiro Shibayama

The University of
Tokyo

82

イオン液体中における刺激応答性高分子の圧力応
柴山
答性相転移

充弘

東京大学

物性研究所

Pressure-responsive phase behavior of polymer in ionic liquid

Mitsuhiro Shibayama

The University of
Tokyo

83

時分割 SANS 測定によるイオン液体中における均
柴山
一高分子網目構造形成過程の解明

充弘

東京大学

物性研究所

Gelation mechanism of Tetra-armed network structure in ionic
The University of
Mitsuhiro Shibayama
liquid studied by time-resolved small angle neutron scattering
Tokyo

84

スピン誘導型強誘電体における誘電 ( 磁気 ) ドメ
満田
イン駆動

節生

東京理科大学

理学部

Ferroelectric domain wall motion in a electromagnetic
multiferroic CuFeO2

Setsuo Mitsuda

Tokyo University of
Science

東京大学

物性研究所

Visualization of cross-link points in polymer network

Kengo Nishi

The University ofTokyo

85 高分子網目内部の架橋点の可視化

西86 界面不活性の働きをする界面活性剤

貞包

浩一朗

立命館大学

理工学部

Surfactant molecules behaving as a surface-inactive agent

Koichiro Sadakane

Ritsumeikan University

87

高圧条件下における２成分混合溶液の新奇な臨界
貞包
挙動

浩一朗

立命館大学

理工学部

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

Koichiro Sadakane

Ritsumeikan University

88

中性子小角散乱によるタンパク質凝縮物の構造解
野島
析

達也

東京工業大学

フロンティア研 Precise structural analyses on protein condensate by small
angle neutron scattering
究機構

Tatsuya Nojima

Tokyo Institute ofTechnology

金谷

利治

京都大学

化学研究所

Toshiji Kanaya

Kyoto University

90

イミダゾリウム系イオン液体とベンゼン誘導体の高椋
混合状態に対する 陽イオン−π相互作用の効果

利幸

佐賀大学

大学院工学系研 Effects of cation- π interaction on mixing state of imidazoliumToshiyuki Takamuku Saga University
based ionic liquid and benzene derivatives
究科91

ポリマーブレンドの相溶性に及ぼす成分ポリマー
高野の一次構造（トポロジー）の影響

敦志

名古屋大学

工学研究科

Influence of topology on the miscibility of a polymer blend

Atsushi Takano

Nagoya University92塑性変形により形成する金属ガラスの不均一構造
足立
解析

望

豊橋技術科学大
機会工学系
学

Deformation induced nanoscale structural inhomogeneity inbulk metallic glass

Nozomu Adachi

Toyohashi Universityof Technology

大竹淑恵

理化学研究所

光量子工学研究
IRT: ULS (Ultra Small Angle Scattering Instrument)
領域

Yoshie Ohtake

RIKEN

結晶内電場を用いた中性子電気双極子能率探索の北口ための結晶評価雅暁

名古屋大学

現象解析研究セ
Study of crystal-diffraction for search of neutron EDM
ンター

Masaaki Kitaguchi

Nagoya University

89 シシケバブ生成における分子量効果

健吾

Effects of molecular weights on shish-kebab formation

ISSP Activity Report 2015

・申請装置 C1-3: ULS
93 ULS（極小角散乱装置）IRT 課題
94

129

・申請装置 C1-3: mf-SANS

130

No.

課題名

氏名

所属

Title

Name

Organization

古坂

道弘

北海道大学

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

Michihiro Furusaka

Hokkaido University

柴山

充弘

東京大学

物性研究所

Mitsuhiro Shibayama

The University ofTokyo

97 鉄系梯子型物質 BaFe2Se3 の中性子スピンエコー 南部

雄亮

東北大学

多元物質科学研 Neutron spin echo measurements on the iron-based laddercompound BaFe2Se3
究所

Yusuke Nambu

Tohoku University

98 高級アルコールの構造緩和とレオロジー

山口

毅

名古屋大学

大学院工学研究
Structural relaxation and rheology of higher alcohols科

Tsuyoshi Yamaguchi Nagoya University

99 界面不活性の働きをする界面活性剤

貞包

浩一朗

立命館大学

理工学部物理科Surfactant molecules behaving as a surface-inactive agent
学科

Koichiro Sadakane

Ritsumeikan University

山室

修

東京大学

物性研究所

IRT: AGNES (Angle Focusing Cold Neutron Spectrometer)

Osamu Yamamuro

The University ofTokyo

101 Zn-Ln-Zn 単分子磁石のスピンダイナミクス

古府

麻衣子

東京大学

物性研究所

Spin dynamics in sigle-molecule magnets Zn-Ln-Zn

Maiko Kofu

The University of
Tokyo

102

Vibrational excitations of H atoms in
nanocrystalline palladium hydride

古府

麻衣子

東京大学

物性研究所

Vibrational excitations of H atoms in nanocrystalline palladium
Maiko Kofu
hydrideThe University of
Tokyo

103

イミダゾリウム系イオン液体およびその液晶相の山室速いダイナミクス

修

東京大学

物性研究所

Fast dynamics of imidaozlium based ionic liquids and theirliquid crystalline phases

Osamu Yamamuro

The University of
Tokyo

104

パラジウムナノ粒子中の水素原子の速いダイナミ
山室
クス

修

東京大学

物性研究所

Fast dynamics of hydrogen atoms in palladium nano-particles

Osamu Yamamuro

The University of
Tokyo

修

東京大学

物性研究所

Dynamics of water on surface of reverse osmotic membranes

Osamu Yamamuro

The University of
Tokyo

東京大学

物性研究所

Interaction between slow dynamics of nuclear and magnetic
domains in relaxor magnet LuFeCoO4

Minoru Soda

The University ofTokyo

95 C1-3（小型集束型小角散乱装置）IRT 課題

ISSP Activity Report 2015

・申請装置 C2-3-1: iNSE
96 iNSE（中性子スピンエコー装置）IRT 課題

IRT: iNSE (New issp Neutron Spin Echo Spectrometer)

・申請装置 C3-1-1: AGNES100

AGNES（高分解能パルス冷中性子分光器）IRT
課題

105 逆浸透膜表面における水のダイナミクス
106

リラクサー磁性体 LuFeCoO4 におけるナノドメ
インのダイナミクス

山室
左右田

稔

107 水／逆浸透膜系の遅いダイナミクス

山室

修

東京大学

物性研究所

Slow dynamics of water/(reverse osmotic membranes) systems Osamu Yamamuro

The University ofTokyo

108 ROM-11.5D2O の遅いダイナミクス

山室

修

東京大学

物性研究所

Slow dynamics of ROM-11.5D2O

The University ofTokyo・申請装置 C3-1-2: MINE1

Osamu Yamamuro

No.
109

課題名

氏名

MINE1（京大炉：多層膜中性子干渉計・反射率計）
日野
IRT 課題

所属

Title

Name

Organization

正裕

京都大学

原子炉実験所

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

Masahiro Hino

Kyoto University

日野

正裕

京都大学

原子炉実験所

Development of 2-dimensional focusing device

Masahiro Hino

Kyoto University

MINE2（京大炉：多層膜中性子干渉計・反射率計）
日野
IRT 課題正裕

京都大学

原子炉実験所

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

Masahiro Hino

Kyoto University

112 2 次元中性子集光デバイスの開発
・申請装置 C3-1-2: MINE2
110

111 超冷中性子光学のためのデバイス開発

北口

雅暁

名古屋大学

現象解析研究セ
Development of optical devices for ultra cold neutrons
ンター

Masaaki Kitaguchi

Nagoya University

113 2 次元中性子集光デバイスの開発

日野

正裕

京都大学

原子炉実験所

Masahiro Hino

Kyoto University

高分子 / 水界面における生体分子の吸着状態の解
松野
析

寿生

九州大学

大学院工学研究 Analyses of adsorbed biomolecules at the polymer/waterinterface
院

Hisao Matsuno

Kyushu University

田中

敬二

九州大学

工学研究院

Swelling behavior of polymer thin films in mixed non-solvents

Keiji Tanaka

Kyushu University

吉沢

英樹

東京大学

物性研究所

IRT: HQR (High Q Resolution Triple Axis Spectrometer)

Hideki Yoshizawa

The University of
Tokyo

114

115 混合液体中における高分子薄膜の膨潤挙動

Development of 2-dimensional focusing device

・申請装置 T1-1: HQR
116 HQR（高分解能中性子散乱装置）IRT 課題

ISSP Activity Report 2015

117

時間分割中性子散乱測定による磁気構造変化過程
元屋の実時間追跡清一郎

東京理科大学

理工学部

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

Tokyo University of
Science

118

PbCuSO4(OH)2 の磁場によって誘起される新奇量
安井
子相

幸夫

明治大学

理工学部

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

Yukio Yasui

Meiji University

119

CeRhIn5 の圧力下中性子回折実験による磁性と超小林伝導の相関の研究

理気

東京大学

物性研究所

Neutron diffraction study on CeRhIn5 under pressure

Riki Kobayashi

The University of
Tokyo

120

スピン格子結合系における磁気相転移と電気分極
満田の一軸応力制御節生

東京理科大学

理学部

Uniaxial-stress control of magnetic phase transition and electric
Setsuo Mitsuda
polarization in a spin-lattice coupled system

Tokyo University of
Science121

空間反転対称性を欠く二次元的系 CeNiC2 の磁気
片野
構造

進

埼玉大学

理工学研究科

Magnetic structures of the non-centrosymmetrical 2D system
CeNiC2

Susumu Katano

Saitama University

131

122 EuRu2P2 の磁気構造解析

藤原

哲也

山口大学

大学院理工学研
Magnetic structure analysis of EuRu2P2
究科

Fujiwara Tetsuya

Yamaguchi University

123 EuCo2P2 の磁気構造解析

藤原

哲也

山口大学

大学院理工学研
Magnetic structure analysis of EuCo2P2
究科

Fujiwara Tetsuya

Yamaguchi University

132

No.

ISSP Activity Report 2015

課題名

氏名

124 新規スピンラダー系 BiCu2PO6 の磁気相関の研究 藤田

全基

東北大学

金属材料研究所

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

宏武

山口大学

重松

宏武

125

126 Rb2MoO4 における多形転移とソフトフォノン

所属

Title

Name

Organization

Study of magnetic correlations in novel spin-ladder system
BiCu2PO6

Masaki Fujita

Tohoku University

教育学部

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

Hirotake Shigematsu Yamaguchi University

山口大学

教育学部

Polymorph transition and soft phonon in Rb2MoO4

Hirotake Shigematsu Yamaguchi University

127

SrFeO3 の multi-q 磁気状態における長時間緩和
現象

中島

多朗

理化学研究所

創発物性科学研
Long-time magnetic relaxation in the multi-q state of SrFeO3究センター

Taro Nakajima

RIKEN

128

2 等辺三角格子反強磁性体 CoNb2O6 における交満田
換相互作用定数の一軸応力による制御

節生

東京理科大学

理学部

Anisotropic control of exchange interactions in a frustrated
isosceles triangular lattice Ising antiferromagnet CoNb2O6

Setsuo Mitsuda

Tokyo University of
Science

原子分子材料科
IRT: AKANE (Advanced Kinken Neutron Spectrometer)
学高等研究機構

Kenji Ohoyama

Tohoku University

Haruhiro Hiraka

KEK・申請装置 T1-2: AKANE
129

AKANE（東北大金研：三軸型中性子分光器 ）IRT 課題

大山

研司

東北大学

130

遍歴電子反強磁性体 Mn3Si における動的スピン階層構造の研究平賀晴弘

高エネルギー加 物質構造科学研 Study on dynamical spin hierarchy structure in itinerantelectron antiferromagnet Mn3Si
速器研究機構究所

131

マルチフェロイック物質 SmMn2O5 の磁気秩序と
木村
強誘電性

宏之

東北大学

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

Hiroyuki Kimura

Tohoku University132

マルチフェロイック物質 YMn2O5 における磁性と強誘電性の磁性イオン置換効果

木村

宏之

東北大学

多元物質科学研 Substitution effect of magnetic ions on magnetism andferroelectricity in multiferroic YMn2O5
究所

Hiroyuki Kimura

Tohoku University

133

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

全基

東北大学

金属材料研究所

Study of spin correlations in novel T’ -structured cuprate oxide
Masaki Fujita
Pr2-xCaxCuO4

Tohoku University

134 新規スピンラダー系 BiCu2PO6 の磁気相関の研究 藤田

全基

東北大学

金属材料研究所

Study of magnetic correlations in novel spin-ladder system
BiCu2PO6

Masaki Fujita

Tohoku University

Al 置換した La214 系銅酸化物高温超伝導体のス
鈴木
トライプ秩序と超伝導の研究

謙介

東北大学

金属材料研究所

Study of Al-induced stripe order and superconductivity in Alsubstituted La-214 cuprate

Kensuke Suzuki

Tohoku University

高阪

勇輔

広島大学

大学院理学研究
Chiral magnetic structure in CrX (X=Si, Ge)科

Yusuke Kousaka

Hiroshima University

137 MPO4 (M: 遷移金属 ) のカイラル磁気構造の検証 高阪

勇輔

広島大学

大学院理学研究
Chiral magnetism in MPO4 (M: Transition Metal)科

Yusuke Kousaka

Hiroshima University

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

勇輔

広島大学

大学院理学研究 Crossover between conical and screw magnetic phase in(Mn,Mg)Cr2O4
科

Yusuke Kousaka

Hiroshima University

Chul-Ho Lee

AIST

135

136 CrX (Cr=Si, Ge) のカイラル磁気構造の検証

138

139 ホールドープ型鉄系超伝導体のスピン揺動李哲虎

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

No.

課題名

氏名

所属

Title

Name

Organization

・申請装置 T1-3: HERMES140

HERMES（東北大金研：中性子粉末回折装置）
IRT 課題141 新酸窒化物の構造の解明
142

大山

東北大学

原子分子材料科 IRT: HERMES(Kinken Powder Diffractometer for High Efficiency
Kenji Ohoyama
学高等研究機構 and High Resolution MEasurementS)

Tohoku University

京都大学

大学院工学研究 Investigation of the structure and magnetism of a new
oxynitride family
科

Cedric Tassel

Kyoto University

正知

東京工業大学

大学院理工学研 Crystal structure and ion-diffusion path of layered perovskitetype oxides
究科

Masatomo Yashima

Tokyo Institute ofTechnology

研司

タッセル
ドリック

層状ペロブスカイト型酸化物の結晶構造とイオン
八島
拡散経路

セ

143 可視光応答型酸窒化物光触媒の構造物性

八島正知

東京工業大学

大学院理工学研 Crystal structure and photocatalytic activity of visible-light
responsive photocatalyts
究科

Masatomo Yashima

Tokyo Institute ofTechnology

144 層状遷移金属オキシカルコゲナイドの磁気構造

分島

亮

北海道大学

大学院理学研究 Magnetic structures of layered transition metal
oxychalcogenides
院

Makoto Wakeshima

Hokkaido University

雄亮

東北大学

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

Yusuke Nambu

Tohoku University

土井

貴弘

北海道大学

大学院理学研究
Magnetic structure of rare earth and transition metal oxides
院

Yoshihiro Doi

Hokkaido University

Daisuke Okuyama

Tohoku University

145

二層三角格子反強磁性体 Fe2Ga2S5 の結晶構造と南部
磁気構造

146 希土類−遷移金属複合酸化物の磁気構造

ISSP Activity Report 2015147

反転対称性の破れた磁性体
Re5Ru3Al2(Re=Ce,Pr,Nd) の磁気秩序構造

奥山

大輔

東北大学

多元物質科学研 Magnetic structure of Re5Ru3Al2(Re=Ce,Pr,Nd) without spatial
inversion symmetry
究所

148

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

隆文

京都大学

工学研究科

149

正方 4 配位 Mn イオンを含む複合ペロブスカイト
山田
酸化物の磁気構造幾也

大阪府立大学21 世紀科学研究
Magnetic structures of square-coordinated Mn complex
機構 ナノ科学・
perovskite oxides
材料研究センター

Ikuya Yamada

Osaka Prefecture
University

150 異常高原子価鉄ペロブスカイト酸化物の磁気構造 山田幾也

大阪府立大学21 世紀科学研究
Magnetic structures of Fe4+-congaining complex perovskite
機構 ナノ科学・
oxides
材料研究センター

Ikuya Yamada

Osaka Prefecture
University

151 クロム複合硫化物の結晶構造と磁気転移

慶太郎

宇都宮大学

工学研究科

Crystal structures and magnetic transitions of chromium
complex sulfides

Keitaro Tezuka

Utsunomiya University

Magnetization reversal and magnetic structure of electron
doped manganites

Michiaki Matsukawa Iwate university

手塚

Investigation for magnetic structure and phase boundary of(Ba,Sr)FeO3 with an unusually high valence strate of iron

Takafumi Yamamoto Kyoto university

152

電子ドープ型マンガン酸化物の磁化の反転と磁気
松川
構造

倫明

岩手大学

工学部

153

シャンダイト型遷移金属化合物 Co3Sn2-xInxS2 の田畑
磁気構造解析

吉計

京都大学

大学院工学研究 Magnetic structure of shandite-type transition-metal compound
Yoshikazu Tabata
Co3Sn2-xInxS2
科

Kyoto University
The University of
Tokyo

133

154 Magnetic structures of frustrated magnets

益田

隆嗣

東京大学

物性研究所

Magnetic structures of frustrated magnets

一次元フラストレート鎖 ANi(VO4)(OD)(A=Ca,Sr) の磁気構造萩原雅人

東京理科大学

理工学部

Magnetic structure of frustrated chain magnetism AM(VO4)(OD)
Masato Hagihara(A=Ca,Sr;M=Co,Ni)

155

Takatsugu Masuda

Tokyo University of
Science

134

No.

課題名

氏名

所属

Title

Name

Organization

ISSP Activity Report 2015

新規ペロブスカイト関連 AA’ BO4 型構造をもつ
156 酸化物イオン伝導体の結晶構造とイオン伝導経路 藤井
の解明

孝太郎

東京工業大学

理工学研究科

Structural investigation of the novel perovskite related AA’
BO4-type materials ? oxide-ionic and electronic conducting
materials?

Kotaro Fuii

Tokyo Institute ofTechnology

157 T’ 構造銅酸化物の超伝導発現と結晶構造の関係

藤田

全基

東北大学

金属材料研究所

Relation between superconducting mechanism and crystal
structure in T’ cuprate oxide

Masaki Fujita

Tohoku University

158 ホイスラー合金 Ru2CrSi の反強磁性状態

重田

出

鹿児島大学

大学院理工学研
Antiferromagnetic state of Heusler alloy Ru2CrSi
究科

Iduru Shigeta

Kagoshima University

159 鉄ヒ素 112 系超伝導体の磁気秩序構造の研究

鈴木

謙介

東北大学

金属材料研究所

Study of magnetic structure of 112-type iron arsenide
superconductor

Kensuke Suzuki

Tohoku University

Hydride Insertion into Perovskite Oxynitrides

Hiroshi Kageyama

Kyoto University

160

ペロブスカイト型酸窒化物に対する水素化物イオ
陰山
ン挿入

洋

京都大学

工学研究科

161

新規カイラル磁性体 CrX (X: Si, Ge) の磁気構造
解析

高阪

勇輔

広島大学

大学院理学研究 Magnetic structure analysis in new chiral magnetic compounds
Yusuke Kousaka
CrX (X: Si, Ge)科

Hiroshima University

162

新規カイラル磁性体 MPO4 (M: 遷移金属 ) の磁気
高阪
構造解析

勇輔

広島大学

大学院理学研究 Magnetic structure analysis in new chiral magnetic compounds
Yusuke Kousaka
MPO4 (M: transition metal)
科

Hiroshima University

163

トポロジカルホール効果を示す金属らせん磁性体
中島
SrFeO3 における Rh 置換効果

多朗

理化学研究所

創発物性科学研
Rh-substitution effect on a metallic helimagnet SrFeO3
究センター

RIKEN

164 鉄系超伝導体の結晶構造と超伝導の相関李哲虎

Taro Nakajima

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

AIST

165

平面４配位構造を有する正方格子磁性体マンガン
辻本
酸塩化物の磁気基 底状態の研究

吉廣

物質材料研究機 先端材料プロセ Neutron diffraction study of new square-lattice magnet
Sr2MnO2Cl2 with square planar coordination
構
スユニット

Yoshihiro Tsujimoto

NIMS

166

平面ピラミッド配位構造を有する正方格子磁性体
辻本
ニッケル酸ハロゲ ン化物の磁気基底状態の研究

吉廣

物質材料研究機 先端材料プロセ Neutron diffraction study of new square-pyramidal coordinatedYoshihiro Tsujimoto
nickel oxyhalides Sr2NiO3X (X = F, Cl)
構
スユニット

NIMS

167

ルテニウム含有ペロブスカイト型酸化物の中性子
野村
回折測定

勝裕

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

Katsuhiro Nomura

AIST

宏之

東北大学

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

Hiroyuki Kimura

Tohoku University

Satoru Kobayashi

Iwate University

・申請装置 T2-2: FONDER
168 FONDER（中性子 4 軸回折装置）IRT 課題

木村

169

塑性歪みを加えた Pt3Fe 反強磁性体における強磁小林性の発現機構

悟

岩手大学

工学部

Mechanism of ferromagnetism in plastically deformed Pt3Fe
antiferromagnet

170

スピン三重項超伝導体 Sr2RuO4 の一軸圧力下中性子散乱実験

山崎照夫

東京理科大学

理工学部

Neutron scattering of the triplet superconductor Sr2RuO4 underTeruo Yamazaki
uniaxial pressures

171

DyFe2Zn20 における磁気異方性増強を伴う逐次
磁気相転移

岩佐

和晃

東北大学

大学院理学研究 Successive magnetic phase transition with enhancement inmagnetic anisotropy of DyFe2Zn20
科

Kazuaki Iwasa

Tokyo University of
ScienceTohoku University

No.

課題名

氏名

所属

Title

Name

Organization

172

マルチフェロイック物質 SmMn2O5 の磁気秩序と
木村
強誘電性

宏之

東北大学

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

Hiroyuki Kimura

Tohoku University

173

マルチフェロイック物質 YMn2O5 における磁性と強誘電性の磁性イオン置換効果

木村

宏之

東北大学

多元物質科学研 Substitution effect of magnetic ions on magnetism andferroelectricity in multiferroic YMn2O5
究所

Hiroyuki Kimura

Tohoku University

174

孤立四面体量子スピン系の新モデル物質
K4Cu4OCl10 の磁気構造藤原理賀

東京理科大学

理学部第一部

Masayoshi Fujihara

Tokyo University of
Science

175

Ca2Fe2-xAlxO5 におけるスピンフロップ転移時の阿部
磁気構造変化の観測

伸行

東京大学

新領域創成科学
Magnetic structure study in magnetoelectric Ca2Fe2-xAlxO5
研究科

Nobuyuki Abe

The University of
Tokyo

176

孤立四面体量子スピン系の新たなモデル物質
K4Cu4OCl10 の磁気構造藤原理賀

東京理科大学

理学部

The magnetic structure of K4Cu4OCl10 as new ideal isotropic
quantum spin tetrahedral system.

Masayoshi Fujihara

Tokyo University of
Science

上床

美也

東京大学

物性研究所

IRT: Accessory

Yoshiya Uwatoko

The University ofTokyo

The magnetic structure of K4Cu4OCl10 as new ideal isotropic
quantum spin tetrahedral system.

・申請装置 Accessory
177 アクセサリー IRT 課題

ISSP Activity Report 2015

135

136

平成 27 年度 軌道放射物性研究施設 共同利用課題一覧 / Joint Research List of Syncrotron Radiation Researcher 2015
No.

課題名

氏名

所属

Title

ISSP Activity Report 2015

Name

Organization

Iwao Matsuda

The University ofTokyo

Masaharu Oshima

The University ofTokyo

Yoshihisa Harada

The University ofTokyo

Hirokazu Fukidome

Tohoku University

播磨分室 / Harima Branch
Promoting development of experimental techniques using
polarized high-brilliant soft X-ray

1

偏光を利用した高輝度軟 X 線実験技術開発の促進 松田

巌

東京大学

物性研究所

2

省エネ・創エネ・蓄電デバイスのオペランドナノ
尾嶋
分光

正治

東京大学

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

3

大気圧下の角度分解型超高分解能軟Ｘ線発光分光
原田
システムの開発

慈久

東京大学

物性研究所

4

オペランド 3D nano-ESCA を用いた二次元原子
薄膜ヘテロ接合系の観察とデバイス応用 (I) 絶縁 吹留
膜との界面相互作用

博一

東北大学

Operando analysis and device applications of hetero電気通信研究所 junctioned 2D atomic layers (I) Establishment of operando
spectromicroscopy using graphene as a model system

Development of angle resolved ultrahigh resolution soft X-ray
emission spectroscopy in atmospheric pressure

5

オペランド軟 X 線吸収 / 発光分光によるリチウムイオン電池用電極材料の電子状態解析、および充 朝倉
放電反応に対する配位子軽元素の寄与の解明

大輔

産業技術総合研 エネルギー技術
electrode materials for Li-ion batteries and investigation of the role Daisuke Asakura
究所
研究部門

AIST

6

酸素 K 吸収端共鳴非弾性Ｘ線散乱によるホールド
石井ープ型銅酸化物高温超伝導体の電荷励起

賢司

日本原子力研究 量子ビーム応用 Charge excitations in high-Tc cuprates studied by resonant
inelastic x-ray scattering at the oxygen K-edge
開発機構
研究センター

Kenji Ishii

JAEA

7

軟 X 線時間分解光電子分光を用いた重い電子系
Yb 化合物の価数揺動状態の研究

大川

万里生

東京理科大学

理学部

Soft x-ray time-resolved photoemission study on the valencefluctuation in heavy-fermion Yb compounds

Mario Okawa

Tokyo University of
Science8

ピコ秒時分割光電子ホログラフィーの開発

林

東北大学

金属材料研究所

Development of picosecond time-resolved photoelectron
holography

Kouichi Hayashi

Tohoku University

9

二酸化チタン表面における酸素欠陥の光励起キャ
小澤
リア寿命への影響

健一

東京工業大学

理工学研究科物 Influence of oxygen defects of titanium dioxide surfaces on the
Kenichi Ozawa
photoexcited carrier lifetime
質科学専攻

Tokyo Institute ofTechnology

10

顕微高分解能二次元光電子分光による機能性物質
大門における「活性サイト」の構造物性解析

寛Analysis of structures and electronic states of [active-site]
奈良先端科学技 大学物質創成科
in functional materials by microscopic high-resolution two術大学院大学学研究科
dimensional photoelectron spectroscopy

Hiroshi Daimon

NAIST

宮脇

淳

東京大学

物性研究所

RIXS of multiferroic materials in magnetic field

Jun Miyawaki

The University of
Tokyo

12

雰囲気Ｘ線光電子分光によるグラフェン表面にお山本
ける CO2 の吸着状態の研究

達

東京大学

物性研究所

Adsorbed states of CO2 on a graphene surface studied byambient-pressure X-ray photoelectron spectroscopy

Susumu Yamamoto

The University of
Tokyo

13

雰囲気光電子分光による化学修飾した銅表面にお吉信
ける CO2 の活性化および水素化反応

淳

東京大学

物性研究所

Activation and hydrogenation of CO2 on chemically-modified
Cu surfaces studied by ambient-pressure XPS

Jun Yoshinobu

The University of
Tokyo

内富

直隆

長岡技術科学大
工学部
学

高分解能 Co 2p 共鳴非弾性 X 線散乱分光法によ田口る LaCoO3 のスピン転移の観測

幸広

大阪府立大学11 マルチフェロイック物質の磁場中 RIXS 測定

光電子ホログラフィー・原子サイト選択的 XPS
14 による ZnSnAs2:Mn 薄膜の室温強磁性発現機構
の解明
15

好一

Operando soft x-ray absorption/emission spectroscopy studies ofof ligand elements against the charge-discharge reaction

Revealing room-temperature ferromagnetism of ZnSnAs2:Mnthin films by atomic and magnetic structure analysis based on Naotaka Uchitomi
photoelectron holography and site-selective XPS measurements

Observation of the spin-state transition of LaCoO3 by using
大学院工学研究high-resolution Co 2p resonant inelastic x-ray scattering科
spectroscopy

Yukihiro Taguchi

Nagaoka University ofTechnology
Osaka Prefecture
University

No.

課題名

氏名

オペランド顕微分光を用いたグリーン次世代通信
16 デバイスの研究開発 (I) GaN-HEMT におけるコ 吹留
ラプス現象の解明

博一

東北大学

オペランド軟 X 線吸収 / 発光分光によるリチウムイ
17 オン電池用電極材料の電子状態解析、および充放電 朝倉反応に対する配位子軽元素の寄与の解明 その 2

大輔

産業技術総合研 省エネルギー研
electrode materials for Li-ion batteries and investigation of the role Daisuke Asakura
究所
究部門

淳

東京大学

物性研究所

Hydrogenation of CO2 and formate on model Cu catalysts
studied by ambient-pressure XPS

Jun Yoshinobu

The University of
Tokyo

淳

東京大学

物性研究所

RIXS of multiferroic materials in magnetic field II

Jun Miyawaki

The University of
Tokyo

有香子

産業技術総合研究所

Analysis of dopant-site in boron doped diamond by using
photoelectron holography

Yukako Kato

AIST

スイス連邦工科ローザンヌ校大学

Monitoring the ferroelectric instability of BaTiO3 by RIXS

Marco Grioni

Ecole Polytechnique
Federale de Lausanne

東京大学

工学系研究科Study on the electronic states of acetonitrile based
superconcentrated electrolyte by soft X-ray absorption/emission Masashi Okubo
spectroscopy

The University of
Tokyo

18

雰囲気光電子分光による銅系モデル触媒における吉信
CO2 およびフォルメートの水素化

19 マルチフェロイック物質の磁場中 RIXS 測定 II20

光電子ホログラフィ法によるボロンドープダイヤ加藤
モンドのドーパントサイト観察

21
22

宮脇

Grioni Marco
軟 X 線発光 / 吸収分光測定によるアセトニトリル
大久保
系高濃度電解液の電子状態分析

將史

所属

Title

Name

Research and development of green next-generation
電気通信研究所 communication devices by using operando spectromicroscopy Hirokazu Fukidome(I) Investigation of collapse phenomena in GaN-HEMT
Operando soft x-ray absorption/emission spectroscopy studies ofof ligand elements against the charge-discharge reaction II

Organization
Tohoku University
AIST

柏キャンパス E 棟 / Laser and Synchrotron Research Laboratory in Kashiwa

ISSP Activity Report 201523

スピン分解・角度分解分光による Pt/Ge(001) 一
矢治
次元原子鎖の電子状態の研究

光一郎

東京大学

物性研究所

One-dimensional surface states of Pt-induced atomic nanowires
on Ge(001) studied by spin- and angle-resolved photoelectron Koichiro Yaji
spectroscopy

The University of
Tokyo

24

スピン・角度分解分光による Cu(111) 表面電子状
矢治
態のスピン構造研究

光一郎

東京大学

物性研究所

Direct observation of the spin-polarized L-gap surface state
on Cu(111) by spin- and angle-resolved photoelectron
spectroscopy

Koichiro Yaji

The University of
Tokyo

25

スピン・角度分解分光による YIG 基板上 Bi2Se3
松田
及び Cr ドープ Bi2Se3 の界面電子状態の研究

巌

東京大学

物性研究所

Interface state measurement of Bi2Se3 or Cr-doped Bi2Se3 on
YIG by spin and angle-resolved photoelectron spectroscopy

Iwao Matsuda

The University of
Tokyo

26

角度分解分光による SrTiO3 の表面電子状態の研
矢治
究

光一郎

東京大学

物性研究所

Electronic structure of SrTiO3 studied by angle-resolved
photoelectron spectroscopy

Koichiro Yaji

The University of
Tokyo

27

ルテニウム酸化物及びイリジウム酸化物の表面電近藤
子スピン偏極

猛

東京大学

物性研究所

Spin-polarized surface electronic state in rutenate and iridate

Takeshi Kondo

The University ofTokyo

プリンストン大
物理学部
学

Spin polarization measurements of the Fermi arc surface states
Suyang Xuof Weyl semimetal TaAs

Princeton University

行章

東京大学

物性研究所

Polarization-dependent ARPES on Bi(111)/Si

Yukiaki Ishida

The University of
Tokyo

28
29 Bi(111)/Si の偏光依存 ARPES

石田

137

30

Bi(111) 表面電子状態のレーザー SARPES による
矢治
スピン偏極度の研究

光一郎

東京大学

物性研究所

Spin polarization of Bi(111) surface studied by laser SARPES

Koichiro Yaji

The University of
Tokyo

31

高分解能スピン分解分光による Cu(111) 表面電子
矢治
状態のスピン構造研究

光一郎

東京大学

物性研究所

Spin-polarized surface state on Cu(111) studied by highresolution SARPES

Koichiro Yaji

The University of
Tokyo

138

No.

課題名

氏名

所属

Title

Name

Organization

ISSP Activity Report 201532

Bi 系トポロジカル絶縁体のレーザー励起スピン分
黒田
解光電子分光

健太

東京大学

物性研究所

SARPES using laser light on Bi-based topological insulators

Kenta Kuroda

The University of
Tokyo

33

Pb/Ge(111) 表面のレーザー励起スピン・角度分
矢治
解光電子分光

光一郎

東京大学

物性研究所

Laser-SARPES measurement of spin-polarized surface states on
Koichiro Yaji
Pb/Ge(111)- β

The University of
Tokyo

Baojie Feng

東京大学

物性研究所

Probing the electronic structure of WTe2 using high resolution
spin-ARPES

Baojie Feng

The University ofTokyo

Laser spin-resolved photoemission study on spin-orbital
entangled materials

34
35

レーザースピン分解光電子分光によるスピン軌道
黒田
エンタングル状態の研究

健太

東京大学

物性研究所

Kenta Kuroda

The University of
Tokyo

36

空間反転対称性の破れた物質におけるスピン分極
石坂
の観測

香子

東京大学

大学院工学系研 Observation of spin polarization in inversion-symmetry broken
Kyoko Ishizaka
materials
究科

The University of
Tokyo

37

III-V 族半導体基板上に作成したビスマス１次元構造のスピン偏極電子状態

嘉之

大阪大学

生命機能研究科Electronic structure and its spin polarization of one-dimensional
Yoshiyuki Ohtsubo
bismuth surface layers grown of III-V semiconductor substrates

Osaka University38

Ag(111) 表面電子状態の高分解能スピン・角度分
原沢
解光電子分光

あゆみ

東京大学

物性研究所

High-resolution spin- and angle-resolved photoemission
spectroscopy of electronic structure on Ag(111) surface

The University of
Tokyo

大坪

Ayumi Harasawa

No.

課題名

氏名

所属

Title

Name

Organization

平成 27 年度 スーパーコンピュータ 共同利用課題一覧 / Joint Research List of Supercomputer system 2015
No.

課題名

氏名

所属

Title

Name

Organization

1. 第一原理計算 / First-Principles Calculation of Materials Properties

ISSP Activity Report 2015

Atsushi Oshiyama

The University ofTokyo

計算科学研究セ First-principles calculation of interactions between extreme
pulse light and matter
ンター

Kazuhiro Yabana

University of Tsukuba

大阪大学

大学院工学研究 First-principles statistical thermodynamics simulations on the
structure and reactivity of heterogeneous catalysts
科

Yoshitada Morikawa

Osaka University

広島大学

大学院先端物質First-principles study of chiral magnet Cr(NbS2)3
科学研究科

Tatsuya Shishidou

Hiroshima University

真司

東京大学

大学院理学系研 Development and application of first-principles simulation ofmaterial structure and Electronic Properties
究科

Shinji Tsuneyuki

The University ofTokyo

実空間差分法に基づく大規模第一原理電子状態・小野
輸送特性計算手法の開発とシミュレーション

倫也

筑波大学

Development of first-principles electronic-structure and
計算科学研究セtransport calculation method based on real-space finiteンター
difference approach

Tomoya Ono

University of Tsukuba

7

第一原理 GW+Bethe-Salpeter 法による内核電子
野口
励起状態計算

良史

東京大学

物性研究所

First-principles GW+Bethe-Salpeter calculations of coreelectron excitations

Yoshifumi Noguchi

The University of
Tokyo

8

ハード及びソフトナノ物質の原子構造と電子物性 押山

淳

東京大学

工学系研究科

Atomic structures and electronic properties of ard- and softnanomaterials

Atsushi Oshiyama

The University of
Tokyo

9

ナノ構造の量子伝導の第一原理計算

小林

伸彦

筑波大学

数理物質系物理
First-principles study of quantum transport in nanostructures
工学域

Nobuhiko Kobayashi University of Tsukuba

10

第一原理統計熱力学シミュレーションによる不均
森川
一触媒の構造と反応性の研究

良忠

大阪大学

大学院工学研究 First-principles statistical thermodynamics simulations on the
structure and reactivity of heterogeneous catalysts
科

Yoshitada Morikawa

Osaka University

11

固液・固固界面の電子移動・イオン輸送に関する
館山
DFT 計算技術の開発と実証

佳尚

Yoshitaka Tateyama

NIMS

第一原理メタダイナミックス計算による CARE 加
12 工プロセスの解明 - 表面からの原子分離過程の解 稲垣析-国際ナノアーキDFT study on electron transfer and ionic transport at solid物質・材料研究
テクトニクス研
liquid and solid-solid interfaces
機構
究拠点

耕司

大阪大学

大学院工学研究 First-principles meta-dynamics analysis of catalytic referredetching method (analysis of atom removal process)科

Kouji Inagaki

Osaka University

Simulation of an operando soft x-ray spectroscopy using the
ESM method

Minoru Otani

AIST

1

ハード及びソフトナノ物質の原子構造と電子物性 押山

淳

東京大学

工学系研究科2

極限的パルス光と物質の相互作用に対する実時間
矢花第一原理計算

一浩

筑波大学

3

第一原理統計熱力学シミュレーションによる不均
森川
一触媒の構造と反応性の研究

良忠

4

キラル磁性体 Cr(NbS2)3 の第一原理計算

5

物質構造と電子状態の第一原理シミュレーション
常行
手法の開発と応用

6

獅子堂

達也

Atomic structures and slectronic properties of hard- and softnanomaterials

139

13

ESM 法による operando 条件下軟 X 線分光法の大谷
シミュレーション

実

産業技術総合研究所

14

酸化物表面・界面における水素および酸素の反応
笠井
解析

秀明

大阪大学

大学院工学研究 Investigations of hydrogen and oxygen reactions on oxidesurfaces and interfaces
科

Hideaki Kasai

Osaka University

15

半導体表面・界面におけるスピン軌道結合係数の石井
第一原理計算史之

金沢大学

理工研究域数物 Spin-orbit coupling parameters at surfaces and interfaces ofsemiconductors: first-principles study
科学系

Fumiyuki Ishii

Kanazawa University

140

No.

課題名

氏名

所属

Title

Name

Organization

聡高輝度光科学研
究センター

賢一

大阪大学

大学院基礎工学 Microscopic investigations of solid / liquid interfaces using firstKen-ichi Fukui
principles and classical molecular dynamics
研究科

Osaka University

合田義弘

東京工業大学

物質理工学院材
Doping effects of heavy elements for multiferroic materials
料系

Yoshihiro Gohda

Tokyo Institute ofTechnology

19

実空間差分法に基づく大規模第一原理電子状態・小野
輸送特性計算手法の開発とシミュレーション

倫也

筑波大学

Development of first-principles electronic-structure and
計算科学研究セtransport calculation method based on real-space finiteンター
difference approach

Tomoya Ono

University of Tsukuba

20

SiC を用いた次世代パワーデバイスの計算科学に
白石
よる設計

賢二

名古屋大学

未来材料・シスComputational design of SiC-based future power devices
テム研究所

Kenji Shiraishi

Nagoya University21

強誘電体を用いたスピンバレートロニクスの材料
山内
開発

邦彦

大阪大学

産業科学研究所

22

スピントロニクス材料および分子性磁性体の原子小田
構造、磁気状態、電子状態の解析

竜樹

金沢大学

理工研究域数物 Analyses on atomic structure, magnetism, and electronic
structure in spintronics materials and molecular magnets
科学系

多美夫

大阪大学

産業科学研究所

スピントロニクス材料および分子性磁性体の原子小田
構造、磁気状態、電子状態の解析

竜樹

金沢大学

理工研究域数物 Analyses on atomic structure, magnetism, and electronic
structure in spintronics materials and molecular magnets
科学系

Tatsuki Oda

Kanazawa University

第一原理メタダイナミックス計算による CARE 加
25 工プロセスの解明 - 表面からの原子分離過程の解 稲垣
析

耕司

大阪大学

大学院工学研究 First-principles meta-dynamics analysis of catalytic referredetching method (analysis of atom removal process)科

Kouji Inagaki

Osaka University

Susumu Yanagisawa

University of the
Ryukyus16 第一原理計算による a-InGaZnO4 の構造解析

ISSP Activity Report 2015

17

第一原理及び古典分子動力学計算を用いた固液界
福井
面の微視的研究18 マルチフェロイクス物質への重元素ドープ効果

23 遷移金属及びその合金や化合物の第一原理計算
24

安野

小口

First-principles study of the structure of a-InGaZnO4

Satoshi Yasuno

Materials design toward spin-valleytronics by using ferroelectricKunihiko Yamauchi
oxides
Tatsuki Oda

First-principles palculations of transition metals and their alloys
Tamio Oguchi
and compounds

JASRI

Osaka University
Kanazawa University
Osaka University26

有機・金属界面で誘起される磁気分極に関する理
柳澤
論的研究

将

琉球大学

理学部

27

第一原理計算による Fe/Cu 超薄膜の構造および
磁気構造解析

慶幸

東京大学

大学院理学研究 Structural and magnetic anisotropy analyses in Fe/Cu ultra-thin
Yasutomi Tatetsu
films by first-principles calculation
科

The University of
Tokyo

28

第一原理計算と革新的数理手法に基づく並列化超星
大規模電子構造理論

鳥取大学

大学院工学研究 Parallelized ultra-large-scale electronic-structure theory basedon first principle calculation and novel numerical method
科

Takeo Hoshi

Tottori University

29

固体表面上での水素及び酸素の反応における量子
笠井
効果の影響

秀明

大阪大学

大学院工学研究 Quantum effects of hydrogen and oxygen reactions on solid
surfaces.
科

Hideaki Kasai

Osaka University30

高圧力下における共有結合性液体の構造と電子状
下條
態の第一原理計算冬樹

熊本大学

大学院自然科学 First-principles molecular-dynamics study of structural andelectronic properties of covalent liquids under pressure
研究科

Fuyuki Shimojo

Kumamoto University

修

東京大学

物性研究所

Constant-potential simulation of electrode interfaces

Osamu Sugino

The University of
Tokyo

顕治

慶應義塾

大学理工学部

The role of the negatively charged oxygen vacancy in thechemisorption process of oxygen molecules on TiO2 (110)

Kenji Yasuoka

Keio University

31 電位規制電極界面シミュレーション
32

立津

杉野

健夫

TiO2(110) での酸素分子の吸着過程における負に泰岡
帯電した酸素欠陥の役割解明

Theoretical investigation of spin polarization induced at theorganic-metal interfaces

No.

課題名

氏名

Title

Name

Organization

央将

東京大学

大学院工学系研 Numerical studies on anharmonic phonon properties based on
Terumasa Tadanodensity functional theory
究科

小林

伸彦

筑波大学

数理物質系物理
First-principles study of quantum transport in nanostructures
工学域

強誘電体を用いたスピンバレートロニクスの材料
山内
開発

邦彦

大阪大学

産業科学研究所

Materials design toward spin-valleytronics by using ferroelectricKunihiko Yamauchi
oxidesOsaka University

西館

数芽

岩手大学

工学部

Theoretical investigation of growing process of organic
semiconductors

Kazume Nishidate

Iwate University

37

極限的パルス光と物質の相互作用に対する実時間
矢花第一原理計算一浩

筑波大学

計算科学研究セ First-principles calculation of interactions between extreme
pulse light and matter
ンター

Kazuhiro Yabana

University of Tsukuba

38

第一原理計算に基づく硬磁性物質の保磁力起源の
平井
解明

大介

東京大学

大学院理学系研First-principles study of coercivity in hard magnetic materials
究科

Daisuke Hirai

The University of
Tokyo

39

電圧印加第一原理計算と統計手法による電気化学
安藤
界面の理論解析康伸

東京大学

工学系研究科Yasunobu Ando

The University of
Tokyo

40

ナイロン分解酵素 NylC の耐熱化制御に関する理
重田
論的研究

育照

筑波大学

大学院数理物質
Theoretical design of heat resistivity of NylC
科学研究科

Yasuteru Shigeta

University of Tsukuba

41

金属／半導体界面における欠陥生成の研究：安定中山
性とイオン化拡散隆史

千葉大学

理学部物理学科

Takashi Nakayama

Chiba University

42

ハイブリッド abinitioQM/MM シミュレーション
舘野による生体高分子の理論解析

賢

兵庫県立大学

大学院生命理学 Hybrid ab initio QM/MM simulations of biologicalmacromolecular systems
研究科

Masaru Tateno

University of Hyogo

重田

育照

筑波大学

大学院数理物質First-principles analyses on protein folding processes
科学研究科

Yasuteru Shigeta

University of Tsukuba

44

金属酸化物の振る舞いを特徴付ける構造単位の探
赤木
索

和人

東北大学

原子分子材料科 Exploration of structure motifs characterizing the behavior of
学高等研究機構 metal oxides

Kazuto Akagi

Tohoku University

45

固液・固固界面の電子移動・イオン輸送に関する
館山
DFT 計算技術の開発と実証

佳尚

国際ナノアーキDFT study on electron transfer and ionic transport at solid物質・材料研究
テクトニクス研
liquid and solid-solid interfaces機構
究拠点

Yoshitaka Tateyama

NIMS

Yuichi Ikuhara

The University of
Tokyo

33

密度汎関数理論に基づく非調和フォノン物性の数
只野
値的研究

所属

34 ナノ構造の量子伝導の第一原理計算
35

36 有機半導体成長過程の理論的研究

ISSP Activity Report 2015

43 タンパク質折りたたみ過程の量子論的解析

Theoretical analysis of electrochemical interfaces by firstprinciples calculation and statistical approach

Defect generation at metal/semiconductor interfaces: stability
and ionization diffusion

大学院工学系研Study of atomic structure and electronic states of interfaces
究科総合研究機and dislocations
構

The University ofTokyo

Nobuhiko Kobayashi University of Tsukuba

141

46 界面と転位の原子構造と電子状態の研究

幾原

雄一

東京大学

47 粒界の構造と電子状態の第一原理計算

幾原

雄一

東京大学

大学院工学系研First-principles study of atomic and electronic structure of grain
Yuichi Ikuhara
究科総合研究機boundaries
構

The University of
Tokyo

48

第一原理及び古典分子動力学計算を用いた電解質
福井
溶液 / 電極界面における電位依存性の評価

賢一

大阪大学

First-principles and classical molecular dynamics investigations
大学院基礎工学
Ken-ichi Fukui
of electrolyte solution / electrode interfaces: potential
研究科
dependence

Osaka University49

時間依存密度汎関数法に基づく第一原理電子輸送
江上シミュレーターの開発と応用

喜幸

北海道大学

Development and application of first-principles electron大学院工学研究transport simulator based on time-dependent density functional Yoshiyuki Egami
院
theoryHokkaido University

142

No.

課題名

氏名

所属

Title

Name

Organization

ISSP Activity Report 201550

ナノ構造のイオン輸送特性、電気特性および界面
渡邉
電子状態の理論解析

聡

東京大学

大学院工学系研 Theoretical analyses on ionic transport properties, electricalproperties and interfacial electronic states of nanostructures
究科

51

外場中ナノ構造の励起電子状態とダイナミクスの渡辺
第一原理計算一之東京理科大学

理学部

52

ワイドギャップ半導体のデバイス応用のための第
斎藤
一原理計算

峯雄

金沢大学

理工研究域数物 First-principles calculation for device application of wide gap
semiconductors
科学系

Mineo Saito

Kanazawa University

53

次世代相変化メモリのデバイス特性に関する第一
洗平
原理計算

昌晃

名古屋大学

未来材料・シス First-principles study on device properties of emerging phasechange memory devices
テム研究所

Masaaki Araidai

Nagoya University

54

第一原理計算によるグラフェン担持 Pt クラスタ
ーの触媒特性の研究

濱本

雄治

大阪大学

大学院工学研究 First principles study of catalytic properties of Pt cluster
supported on graphene
科

Yuji Hamamoto

Osaka University

内田和之

京都産業大学

理学部

First-principles study of moire patterns in atomic layers

Kazuyuki Uchida

Kyoto Sangyo
University

56

第一原理分子動力学法に基づくネットワーク形成
高良
系ガラスの静的構造に関する研究

明英

熊本大学

学生支援部

Ab initio molecular dynamics study for the static structure of
the network forming glass

Akihide Koura

Kumamoto University

57

第一原理計算によるグラフェン担持 Pt クラスタ
ーの触媒特性の研究

濱本

雄治

大阪大学

大学院工学研究 First principles study of catalytic properties of Pt cluster
supported on graphene
科

Yuji Hamamoto

Osaka University

58

ワイドギャップ半導体のデバイス応用のための第
斎藤
一原理計算

峯雄

金沢大学

理工研究域数物 First-principles calculation for device application of wide gap
semiconductors
科学系

Mineo Saito

Kanazawa University

59

電子デバイスのための自己組織化ナノインターフ レービガー
ェイスの理論ハンネス

横浜国立大学

大学院工学研究
Theory of self-organized nano-interfaces for electronic devices Hannes Raebiger
院60

有機・金属界面で誘起される磁気分極に関する理
柳澤
論的研究

将

琉球大学

理学部

61

ハイブリッド abinitioQM/MM シミュレーション
舘野による生体高分子の理論解析

賢

兵庫県立大学

大学院生命理学 Hybrid ab initio QM/MM simulations of biologicalmacromolecular systems
研究科

62

界面の電子状態変調に伴う Pd(100) 超薄膜の磁性
佐藤
変化

徹哉

慶應義塾大学

理工学部

東北大学

原子分子材料科 First-principles investigation of functional interfaces in metallic
Wang Zhongchang
学高等研究機構 oxides

Tohoku University

大学院工学研究 Development of oxygen storage materials and analysis ofhydrogen embrittlement properties of steel
院

Yuji Kunisada

Hokkaido University

Kazuma Nakamura

Kyushu Institute ofTechnology

55 原子膜積層系におけるモアレの第一原理計算

63 酸化物の機能性界面の第一原理計算

王

中長

64

新規酸素吸蔵材料の開発と鉄鋼材料における水素國貞
脆化特性の解明

雄治

北海道大学

65

AbinitioGW+ キュムラント展開法を用いた低次元系のスペクトル関数計算

中村和磨

九州工業大学

石井

史之

金沢大学

66 スピン軌道場と熱電能の第一原理計算

Satoshi WatanabeFirst-principles study of excited electronic states and dynamics
Kazuyuki Watanabeof nanostructures under external fields

Theoretical investigation of spin polarization induced at theorganic-metal interfaces

Change in magnetism of Pd(100) ultrathin films due to themodulation in the interface electric states

Ab initio GW+cumulant study for spectral function of lowdimensional system

The University of
Tokyo
Tokyo University of
Science

Yokohama National
University

Susumu Yanagisawa

University of the
RyukyusMasaru Tateno

University of Hyogo

Tetsuya Sato

Keio University

理工研究域数物First-principles calculation of spin-orbit field and thermopower Fumiyuki Ishii
科学系

Kanazawa University

No.

課題名

氏名

所属

Title

Name

Organization67

新規局所的光学特性測定法の検討と鉄鋼材料にお國貞
ける水素脆化特性の解明

雄治

北海道大学

Development of measurement technique of local optical
大学院工学研究
property and analysis of hydrogen embrittlement properties of Yuji Kunisada
院
steel

68

不純物添加による光捕集性分子の光吸収特性への大村
影響：第一原理分子動力学計算

訓史

広島工業大学

工学部

Doping effects on light absorption of light-harvesting molecules:
Satoshi Ohmura
ab initio molecular-dynamics study

Hiroshima Institute ofTechnology

69 金属／酸化物界面の誘電応答変調の第一原理解析 笠松

秀輔

東京大学

物性研究所

First-principles analysis of the dielectric response at metal/
oxide interfaces

The University of
Tokyo

70

時間依存密度汎関数法に基づく第一原理電子輸送
江上シミュレーターの開発と応用

喜幸

北海道大学

Development and application of first-principles electron大学院工学研究transport simulator based on time-dependent density functional Yoshiyuki Egami
院
theoryHokkaido University

71

下部マントル鉱物の格子熱伝導率に対する鉄固溶
出倉効果の第一原理計算

春彦

愛媛大学

地球深部ダイナFirst-principles calculations of iron solid solution effects on the
Haruhiko Dekura
ミクス研究セン
lattice thermal conductivity of lower mantle minerals
ター

Ehime University

木崎

栄年

大阪大学

大学院工学研究 Pt stepped structure dependence for oxygen reduction reaction
Hidetoshi Kizaki
in fuel cell科

Osaka University

73

エネルギー変換過程における基礎過程の研究と高山下
変換効率化に向けた大規模第一原理計算

晃一

東京大学

Large scale ab initio calculations on the fundamental processes
大学院工学系研of energy convergence devices and on their optimization for
Koichi Yamashita
究科
high conversion efficiency

The University of
Tokyo

74

第一原理 GW 計算による物質のプラズマロン状態
中村の温度依存性解析

和磨

九州工業大学

Temperature dependence of low-energy plasmaron states ofmaterials: Ab initio GW analysis

Kazuma Nakamura

Kyushu Institute ofTechnology

75

固体酸化物燃料電池の電極材料における点欠陥の桑原第一原理計算彰秀

ファインセラミックスセンターFirst principles calculation of point defects in electrodes ofsolid oxide fuel cells

Akihide Kuwabara

Japan Fine Ceramics
Center76

複雑なフェルミ面を持つ物質における超伝導ペア
明石
リング相互作用の第一原理計算

遼介

東京大学

大学院理学系研 Ab initio calculation of superconducting pairing interactions in
Ryosuke Akashi
materials with complex Fermi surface
究科

77

外場中ナノ構造の励起電子状態とダイナミクスの渡辺
第一原理計算一之東京理科大学

理学部

78

ナノ構造のイオン輸送特性、電気特性および界面
渡邉
電子状態の理論解析

聡

東京大学

大学院工学系研 Theoretical analyses on ionic transport properties, electricalproperties and interfacial electronic states of nanostructures
究科

79

遷移金属化合物に対する第一原理バンド計算によ榊原る有効模型導出と多体効果の解析

寛史

鳥取大学

Derivation of effective model in transition metal compounds by
大学院工学研究
first-principles calculation and its analysis from the view point Hirofumi Sakakibara Tottori University
科of many body effect80

ナノ材料熱電特性に及ぼすひずみの影響に関する
塩見
第一原理解析

淳一郎

東京大学

大学院工学系研 First-principles analysis on the strain effect on thethermoelectric properties of nanomaterials
究科
理学部

72 燃料電池酸素還元反応の Pt ステップ構造依存性

ISSP Activity Report 2015

First-principles study of excited electronic states and dynamics
Kazuyuki Watanabeof nanostructures under external fields

Theoretical investigation on electronic properties of organic
solids143

81 有機結晶の電子的性質に関する理論的研究

柳澤

将

琉球大学

82 Si 表面上の原子吸着系のモデル計算

服部賢

奈良先端科学技 物質創成科学研
Model calculations in Si surfaces with adsorbates
術大学院大学
究科

順一郎

東京大学

83

新規エネルギー貯蔵システムの触媒開発と表面反大友
応解析

Shusuke Kasamatsu

大学院新領域創 Study on catalyst synthesis and surface reaction analysis fornovel energy storage systems
成科学研究科Satoshi Watanabe

Hokkaido University

The University of
Tokyo
Tokyo University of
Science
The University ofTokyo

Junichiro Shiomi

The University ofTokyo

Susumu Yanagisawa

University of Ryukyus

Ken Hattori

Nara Instituteof Science andTechnology

Junichiro Otomo

The University of
Tokyo

144

No.

課題名

氏名

ISSP Activity Report 201584

コランダム型 Cr2O3 および Fe2O3 の磁気異方性
小田
エネルギーの解析

85

定電位電極表面における電解質の拡散過程の第一胡原理シミュレーション

86

第一原理電子状態計算プログラム xTAPP の高度
吉本化

87 半導体表面界面欠陥の形成と物性の機構解明
88

洋平

磁石物質とスピン軌道相互作用系の第一原理的研
三宅究

福島工業高等専
門学校

Title
Analysis of magnetic anisotropy energy in corundum-type
Cr2O3 and Fe2O3

Organization

Yohei Kota

Fukushima National
College of Technology

Chunping Hu

Kyoto University

学際融合教育研 First-principles simulation of electrolyte diffusion process on
究推進センター constant-potential electrodes

芳英

東京大学

The University of
情報理工学系研 Development of first-principles electronic structure calculation
Yoshihide Yoshimoto
package xTAPP
Tokyo
究科

博之

島根大学

大学院総合理工 Study on formation and property mechanism of semiconductor
Hiroyuki Kageshima
surfaces/interfaces/defects
学研究科

隆

産業技術総合研 ナノシステム研 First-principles study of magnet materials and spin-orbit
systems
究所
究部門

Takashi Miyake

AIST

Jun Yamauchi

Keio University

Kaoruho Sakata

The University ofTokyo

89 半導体格子欠陥の第一原理計算

山内淳

慶應義塾大学理工学部

90 第一原理計算による水分解用光触媒材料の解析

阪田

薫穂

東京大学

化学システム工 Ab-initio DFT calculations of photocatalyst material for water
splitting学専攻

91 新たなナノスケール界面の電子物性の探索小林功佳

お茶の水女子大
理学部学

金属強磁性体 / スピネルバリア界面の結晶磁気異三浦方性の第一原理計算

良雄

A first-principles study on magneto-crystalline anisotropy of
京都工芸繊維大工芸科学研究科
ferromagnetic metal interfaces with spinel barrier
学

92

Name

京都大学

春平

影島

所属

First-principles study on the defects in semiconductors

Search for electronic properties of new nanoscale interfaces

Shimane University

Katsuyoshi Kobayashi Ochanomizu University
Yoshio Miura

Kyoto Institute ofTechnology

93 金属酸化物中の不純物のまわりの局所構造解析

赤木

和人

東北大学

原子分子材料科
Local structure analysis around impurity atoms in a metal oxide Kazuto Akagi
学高等研究機構

Tohoku University

94 希土類磁石材料の電子状態

赤井

久純

東京大学

物性研究所

Electronic structure of rare earth magnets

Hisazumi Akai

The University ofTokyo

炭化珪素ナノクラスターの高温酸化と水分解反応
鶴田の第一原理計算健二

岡山大学

大学院自然科学 Ab initio simulation of SiC nanocluster for high-temperatureoxidation and water splitting
研究科

Kenji Tsuruta

Okayama University

小畑修二

東京電機大学

理工学部

Shuji Obata

Tokyo Denki University

97 原子膜物質の原子構造・安定性・電子構造の解明 藤本義隆

東京工業大学

大学院理工学研 Stabilities, structures, and electronic properties of atomiclayered materials
究科

Yoshitaka Fujimoto

Tokyo Institute ofTechnology

98 照射損傷と格子間原子との相互作用の研究

一人

九州大学

応用力学研究所

Study of interaction between radiation damage and interstitial
atom

Kazuhito Ohsawa

Kyushu University

望

産業技術総合研究所

Ab initio calculations for the silicon cluster superlattice

Nozomi Orita

AIST

浩次

三重大学

Kohji Nakamura

Mie University

95

96 鉄化合物の磁性計算

大澤

99 シリコンクラスター超格子に対する第一原理計算 織田
100

遷移金属薄膜・有機金属錯体の電子構造と磁性、中村
電界効果に関する第一原理計算

Calculations of Fe compounds magnetism

First principles calculations on electronic structures,
大学院工学研究
magnetism, and electric field effects in transition-metal films
科and organometallic complexes

No.

課題名

氏名

所属

Title

Name

Organization

晋

筑波大学

大学院数理物質Electronic structures of carbon nanomaterials
科学研究科

Susumu Okada

University of Tsukuba

102 原子膜物質の原子構造・安定性・電子構造の解明 藤本義隆

東京工業大学

大学院理工学研 Stabilities, structures, and electronic properties of atomiclayered materials
究科

Yoshitaka Fujimoto

Tokyo Institute ofTechnology

103 有機結晶の電子的性質に関する理論的研究

将

琉球大学

理学部

Theoretical investigation on electronic properties of organic
solidsSusumu Yanagisawa

University of Ryukyus

陽一

慶應義塾大学

理工学部

Theoretical research on dissociation of N2 and H2 for designing
Yoichi Kamihara
new ammonia synthesis catalysts

Keio University

Electronic structure of rare earth magnets

Hisazumi Akai

The University ofTokyo

Yukio Sato

Kyushu University

First-principles momentum dependent local ansatz theory andits application to Fe compounds

Yoshiro Kakehashi

University of Ryukyus

101 ナノスケール炭素物質の物質設計と物性解明

104

岡田

柳澤

アンモニア合成の新触媒設計のための N2 および
神原
H2 の解離現象の理論的評価

105 希土類磁石材料の電子状態

赤井

久純

東京大学

物性研究所

106 熱電材料の電子状態に関する第一原理計算

佐藤

幸生

九州大学

大学院工学研究 First-principles calculation on electronic structure ofthermoelectric material
院

琉球大学

理学部

107

第１原理運動量依存変分理論の構築と鉄化合物へ
梯
の応用

祥郎

平井

國友

奈良県立医科大
医学部
学Electronic state and proximity effects around interface inlayered superlattices

Kunitomo Hirai

Nara Medical
University

正八面体型フラストレーションを持つ磁性合金の
内田
理論

尚志

北海道科学大学

Theory of magnetic alloys with octahedral frustration

Takashi Uchida

Hokkaido University of
Science

豊

大阪電気通信大
工学部学

Wear mechanism of diamond tool

Yutaka Uda

Osaka University

111 重い元素からなる低次元ハニカム格子物質の開拓 高木

紀明

東京大学

大学院新領域創 Exploring of low-dimensional honeycomb materials consistingof heavy elements
成科学研究科

Noriaki Takagi

The University ofTokyo

112 固体表面における磁性分子の構造と電子状態

高木

紀明

東京大学

大学院新領域創 Geometric and electronic structures of magnetic molecules atsolid surfaces
成科学研究科

Noriaki Takagi

The University ofTokyo

113 超精密ダイヤモンド工具の損耗機構

宇田豊

大阪電気通信大
工学部学

Yutaka Uda

Osaka ElectroCommunication
University

114 重い元素からなるハニカム格子の電子状態と構造 高木

紀明

東京大学

大学院新領域創 Geometric and electronic structures of honeycomb materials of
Noriaki Takagi
heavy atoms
成科学研究科The University ofTokyo

115 固体表面の分子磁性に関する研究

高木

紀明

東京大学

大学院新領域創Investigation on molecular magnetism at solid surfaces
成科学研究科

Noriaki Takagi

The University ofTokyo

強相関超伝導体における光誘起相転移ダイナミク
青木
ス

秀夫

東京大学

大学院理学系研 Photoinduced phase transitions in strongly correlated
superconductors
究科

Hideo Aoki

The University ofTokyo

108 層状人工格子界面の電子状態と近接効果
109110 超精密ダイヤモンド工具の損耗機構

宇田

ISSP Activity Report 2015

Wear mechanism of diamond tool

2. 強相関 / Strongly Correlated Quantum Systems

145

116

146

No.

課題名

氏名

所属

Title

Name

Organization

ISSP Activity Report 2015117

高精度変分波動関数を用いた銅酸化物薄膜の第一
今田
原理有効模型の数値的研究

正俊

東京大学

Numerical studies on ab initio low-energy effective models
大学院工学系研for thin films of cuprates by high-precision variational wave
究科
functions

Masatoshi Imada

The University of
Tokyo

118

多変数変分モンテカルロ法の高精度化と鉄系超伝
三澤
導体への応用貴宏

東京大学

大学院工学系研 Improvement of many-variable variational Monte Carlo method
Takahiro Misawa
and its application to iron-based superconductors
究科

The University of
Tokyo

119

電子相関とスピン軌道相互作用の協奏が織りなす
求新物性の解明東京大学

大学院工学系研 Theoretical study of novel physics by synergy between electron
Yukitoshi Motome
correlation and spin-orbit coupling
究科

The University ofTokyo

計算科学研究機 Numerical study of critical phenomena in strongly correlated
dirac electrons
構

RIKEN

幸年

120 強相関デイラック電子系における臨界現象の解明 大塚雄一

理化学研究所

軌道縮退を有する強相関電子系におけるスピン軌
古賀
道相互作用の効果

昌久

東京工業大学

白川知功

理化学研究所

創発物性科学研 Density-matrix renormalization group method for quantum
impurity models
究センター

相関の強い超格子・準周期系で実現されるトポロ
川上ジカル相と非平衡現象

則雄

京都大学

大学院理学研究 Topologically nontrivial phases and nonequilibrium phenomena
Norio Kawakami
in strongly correlated superlattice and quasiperiodic systems
科

Kyoto University

亮太郎

理化学研究所

創発物性科学研First-principles study of multi-orbital correlated materials
究センター

RIKEN

東京大学

大学院工学系研 New physics opened by charge-spin-orbital coupling in strongly
Yukitoshi Motome
correlated electron systems
究科

The University of
Tokyo

121

122 量子不純物模型に対する密度行列繰り込み群法
123

124 多軌道強相関物質の第一原理的研究
125

有田

強相関電子系における電荷・スピン・軌道結合が求もたらす新しい物理

幸年

Yuichi Otsuka

Spin-orbit coupling in strongly correlated electron systems with
Akihisa Koga
orbital degeneracy

Tokyo Institute ofTechnology

Tomonori Shirakawa RIKEN

Ryotaro Arita

吉田

恒也

京都大学

大学院理学研究
Study of correlation effects on topological phases
科

Tsuneya Yoshida

Kyoto University

電子格子相互作用を考慮した鉄系超伝導体の第一
大越
原理有効模型の数値解析

孝洋

東京大学

大学院工学系研 Numerical study of an ab-initio effective model for an ironbased superconductor with electron-phonon interactions
究科

Takahiro Ohgoe

The University of
Tokyo

本山

裕一

東京大学

物性研究所

Numerical simulation of 4He adsorbed on substrates

Yuichi Motoyama

The University ofTokyo

内部自由度を有する相関フェルミ粒子系における
古賀
超伝導と秩序相昌久

東京工業大学Superconductivity and ordered phases in correlated fermion
systems with internal degree of freedom

Akihisa Koga

Tokyo Institute ofTechnology

吉田

恒也

京都大学

大学院理学研究
Study of correlation effects on topological phases
科

Tsuneya Yoshida

Kyoto University131

多変数変分モンテカルロ法を用いた電子格子相互大越作用を含むハバードモデルの研究

孝洋

東京大学

大学院工学系研 Multi-variable variational Monte Carlo study of the Hubbard
model with electron-phonon interactions
究科

Takahiro Ohgoe

The University of
Tokyo

132

並列 MPS 法の開発とフラストレーション系への
五十嵐
応用

亮

東京大学

情報基盤センタ Development of parallelized MPS algorithm and its application
Ryo Igarashi
to various frustrated systemsーThe University of
Tokyo

133

冷却原子系において実現される非平衡系・非一様川上
系における相関効果

則雄

京都大学

大学院理学研究 Correlation effects in nonequilibrium/inhomogeneous cold
atom systems
科

Kyoto University

126 トポロジカル相における強相関効果の解明
127

128 基板吸着 4He の数値解析
129

130 トポロジカル相における強相関効果の解明

Norio Kawakami

No.

課題名

氏名

所属

Title

Name

Organization

134

遍歴・局在カイラルらせん磁性体のモンテカルロ
星野法による研究晋太郎

東京大学

総合文化研究科 Monte carlo study of itinerant and localized chiral helimagnets Shintaro Hoshino

The University of
Tokyo

135

鉄系超伝導体における特異な実空間ホッピングに黒木よる超伝導増強に関する研究

和彦

大阪大学

Study on the enhanced pairing due to peculiar hoppings in the
Kazuhiko Kuroki
iron-based superconductors

Osaka University

136

強相関電子系における磁性状態及びスピン液体相
山田
の研究

篤志

千葉大学

Magnetic properties and spin liquids in the strongly correlated
Atsushi Yamada
electron systems

Chiba University137

正方格子ハバード模型における磁気転移近傍の光
佐藤
学伝導度の解析年裕

理化学研究所

Optical conductivity near the magnetic transition in a squarelattice Hubbard model

Toshihiro Sato

RIKEN

孝

産業技術総合研究所

Quantum Monte Carlo study of strongly correlated electron
systems

Takashi Yanagisawa

AIST

Sumio Ishihara

Tohoku University

Takashi Yanagisawa

AIST

Sumio Ishihara

Tohoku University

Research for multipole ordering and superconductivity inducedby multipole fluctuations in seven-orbital Hubbard model with Takashi Hotta
spin-orbit couplingTokyo Metropolitan
University

138 量子モンテカルロ法による強相関電子系の研究

柳沢

理学研究科

139

相関電子格子系における非平衡ダイナミクスの数
石原
値計算

純夫

東北大学

140

量子モンテカルロ法および第一原理計算による強柳沢
相関電子系の研究

孝

産業技術総合研
究所

石原

純夫

東北大学

大学院理学研究 Novel quantum phase and real time dynamics in correlated
electron systems
科

142

スピン軌道相互作用のある 7 軌道ハバードモデル
堀田に基づく多極子秩序と多極子揺らぎ超伝導の研究

貴嗣

首都大学東京理工学研究科143

多軌道系のスピン輸送における多体効果の理論的
荒川
研究

直也

理化学研究所

創発物性科学研 Theoretical study of many-body effects on spin transports in a
Naoya Arakawa
multiorbital system
究センター

RIKEN

144

クーロン相互作用と電子格子相互作用の協力・競渡部合によるエキシトン凝縮・CDW・超伝導

洋

理化学研究所

Exciton condensation, CDW, and superconductivity induced by
創発物性科学研
cooperation and competition between Coulomb interaction and Hiroshi Watanabe
究センター
electron-lattice interaction

RIKEN

141 相関電子系の新規量子相と実時間ダイナミクス

大学院理学研究 Numerical analyses of nonequilibrium state in electron-latticecorrelated systems
科
Numerical study of correlated electron systems by quantum
Monte Carlo and first-principles calculations

ISSP Activity Report 2015

147

145 基板吸着 4He の数値解析

本山

裕一

東京大学

物性研究所

Numerical simulation of 4He adsorbed on substrates

Yuichi Motoyama

The University ofTokyo

146 物質中のカイラル磁気効果の理論的研究

押川

正毅

東京大学

物性研究所

Theoretical study of chiral magnetic effect in materials

Masaki Oshikawa

The University of
Tokyo

物性研究所

Possibility of supersolid in helium 4 adsorbed on graphite
surface

Naoki Kawashima

The University ofTokyo

Development and application of the quantum Monte Carlo
method for critical phenomena of random bosonic systems

Akiko Masaki-Kato

RIKEN

Structure formation of biomembranes

Hiroshi Noguchi

The University ofTokyo

3. 巨視系の協同現象 / Cooperative Phenomena in Complex, Macroscopic Systems
147

グラファイト上に吸着されたヘリウム４における川島
超固体の可能性

直輝

東京大学

148

量子モンテカルロ法の開発とランダムボーズ原子
正木系の臨界現象晶子

理化学研究所博司

東京大学

149 生体膜の構造形成

野口

物性研究所

148

No.

課題名

氏名

Title

Name

Organization

ISSP Activity Report 2015

The University of
Tokyo

隆史

兵庫県立大学

大学院工学研究
Dynamical properties of honeybomb lattice magnets
科

Takafumi Suzuki

University of Hyogo

彰朗

東京大学

分子細胞生物学 Efficient sampling simulation of the soft modes significantly
contribute to protein properties
研究所

Akio Kitao

The University of
Tokyo

東京大学

物性研究所

Novel phases in frustrated magnets

Tsuyoshi Okubo

The University ofTokyo

Study on relation between impurity doping and magnetic
refrigeration efficiency

Ryo Tamura

NIMS

蛋白質物性に強く関与するソフトモードの効率的
北尾
サンプリングシミュレーション

Tsuyoshi Okubo

鈴木Novel phases in frustrated magnets

151 蜂の巣格子磁性体 Na2IrO3 の動的性質

物性研究所

大久保

東京大学

150 フラストレート磁性体における新奇秩序の探索

152

所属

153 フラストレート磁性体における新奇秩序の探索

大久保

154 不純物ドープと磁気冷凍性能の関係の探求

田村

毅

毅
亮

物質・材料研究機構

高精度変分波動関数を用いたドープされた二次元
155 ハバード模型における光誘起超伝導転移の数値的 今田
研究

正俊

東京大学

工学系研究科

Numerical studies on photoinduced superconductivity in
two dimensional doped Hubbard model by high-precisionvariational wave functions

Masatoshi Imada

The University of
Tokyo

156

膜タンパク質の結合、化学反応による脂質膜の形
野口
態変化

博司

東京大学

物性研究所

Shape transformation of lipid membranes induced by protein
adsorption and chemical reaction

Hiroshi Noguchi

The University of
Tokyo

157

グラファイト上に吸着されたヘリウム４における川島
超固体の可能性

直輝

東京大学

物性研究所

Possibility of supersolid in helium 4 adsorbed on graphite
surface

Naoki Kawashima

The University of
Tokyo

158

量子スピン系の低エネルギー状態に関する数値的
中野
研究

博生

兵庫県立

大学大学院物質
Numerical study on low-energy states of quantum spin systems Hiroki Nakano
理学研究科

University of Hyogo

福島

孝治

東京大学

大学院総合文化
Equilibrium and dynamical properties in glassy systems
研究科

The University ofTokyo

160 三角格子 Kitaev-Heisenberg 模型の量子相の研究 遠山貴己

東京理科大学

理学部応用物理
Study of quantum phases in triangular Kitaev-Heisenberg model Takami Tohyama
学科

Tokyo University of
Science161 蜂の巣格子 Heisenberg-Kitaev 模型の磁気励起

鈴木隆史

兵庫県立大学

大学院工学研究 Mangetic excitations of the Heisenberg-Kitaev model on ahoneycomb lattice
科

Takafumi Suzuki

University of Hyogo

162

ソフトマター系（高分子、液晶、ミセル）の粘弾
村島
性解析とマルチスケールシミュレーション

隆浩

東北大学

大学院理学研究 Viscoelastic analysis on soft matter systems (polymer, liquid
crystal, micelle) and multiscale simulation
科

Takahiro Murashima Tohoku University163

量子スピン系におけるエンタングルメントと量子藤堂
相転移の研究眞治

東京大学

大学院理学系研 Entanglement and quantum phase transition in quantum spin
systems
究科

Synge Todo

The University of
Tokyo

宗

早稲田大学

高等研究所

Quantum information processing based on the ising models

Shu Tanaka

Waseda University

Molecular dynamics study on polymer drag reduction effect

Hiroshi Watanabe

The University ofTokyo

Synge Todo

The University ofTokyo

159 ガラス系の平衡統計力学と動的性質

164 イジングモデル型量子情報処理の展開

田中

165

高分子溶液における摩擦抵抗低減効果の分子動力
渡辺
学計算

宙志

東京大学

物性研究所

166

量子スピン系におけるエンタングルメントと量子藤堂
相転移の研究眞治

東京大学

大学院理学系研 Entanglement and quantum phase transition in quantum spin
systems
究科

Koji Hukushima

No.

課題名

氏名

所属

Title

Name

Organization

167

分子動力学シミュレーションによる生体分子の動奥村的秩序の形成久士

分子科学研究所

計算科学研究セ Dynamical ordering of biomolecular systems by molecular
dynamics simulations
ンター

Hisashi Okumura

Institute for Molecular
Science168

低次元フラストレート磁性体における低エネルギ
下川
ー励起状態の数値的研究

統久朗

大阪大学

大学院理学研究 Numerical study of the low-lying excited state in lowdimensional frustrated magnetism
科

Tokuro Shimokawa

Osaka University

ISSP Activity Report 2015149

169 ガラス状物質のレオロジー

古川

亮

東京大学

生産技術研究所 Rheology of glassy materials

Akira Furukawa

The University ofTokyo

170 ガラス系の平衡統計力学と動的性質

福島

孝治

東京大学

大学院総合文化
Equilibrium and dynamical properties in glassy systems
研究科

Koji Hukushima

The University ofTokyo

171 カゴメ格子反強磁性体の磁場誘起量子相転移

坂井徹

兵庫県立大学

大学院物質理学 Field-induced quantum phase transition in the kagome lattice
antiferromagnet
研究科

Toru Sakai

University of Hyogo

172 時間変動する外場のもとでの動的相転移

宮下

精二

東京大学

理学系研究科Dynamical phase transitions under time dependent external
fieldsSeiji Miyashita

The University ofTokyo

173 乱れたトポロジカル絶縁体のスケーリング理論

大槻

東巳

上智大学

理工学部

Scaling theory of disordered topological insulators

Tomi Ohtsuki

Sophia University

174 フラストレート磁性体における新奇秩序

川村

光

大阪大学

大学院理学研究
Novel order in frustrated magnets
科

Hikaru Kawamura

Osaka University

175 可解量子系に潜むエンタングルメント特性の探求 田中

宗

早稲田大学

高等研究所

Shu Tanaka

Waseda University

176 スピンナノチューブの量子相転移

徹

兵庫県立大学

大学院物質理学
Quantum phase transition of the spin nanotubes
研究科

Toru Sakai

University of Hyogo

177 ２次元量子スピン系のテンソルネットワーク計算 原田

健自

京都大学

大学院情報学研 Tensor network calculation on two-dimensional quantum spinmodels究科

Kenji Harada

Kyoto University

O(N) モンテカルロ法によるスピングラス模型の動力学の研究富田裕介

芝浦工業大学

Yusuke Tomita

Shibaura Institute ofTechnology

179 フラストレート磁性体における新奇秩序

川村

光

大阪大学

大学院理学研究
Novel order in frustrated magnets
科

Hikaru Kawamura

Osaka University

180 バルクエッジ対応の多様性の数値的研究

初貝

安弘

筑波大学

大学院数理物質
Variety of bulk-edge correspondence by numerical methods
科学研究科

Yasuhiro Hatsugai

University of Tsukuba

181

並列化マルチワームアルゴリズムを用いたカゴメ
正木
格子上のボーズ原子系の研究

晶子

理化学研究所

Quantum Monte Carlo simulations of interacting bosons on
kagome lattices with the parallelized multi-worm algorithm

Akiko Masaki-Kato

RIKEN

182

電位センサータンパク質群の動作機構の解明に向鷹野
けた計算科学アプローチ優

広島市立大学

大学院情報科学 Computational study of the mechanism of voltage sensing
proteins
研究科

Yu Takano

Hiroshima City
University

183

観測データからモデルハミルトニアンを推定する
田村
手法開発

亮

物質・材料研究機構

Ryo Tamura

NIMS

178

坂井

Study on entanglement properties in exactly solvable models

Numerical study of dynamics in spin glass models with longrange interactions

Development of a method to estimate a model Hamiltonian
from observed data

150

No.

課題名

氏名

184

不凍タンパク質による氷ベーサル面成長促進機構
灘の分子動力学シミュレーション研究浩樹

所属
産業技術総合研
究所

Title
Molecular dynamics simulation study of growth promotion
mechanism of ice basal plane by antifreeze protein

Name

Organization

Hiroki Nada

AIST

ISSP Activity Report 2015

185 ２次元量子スピン系のテンソルネットワーク計算 原田

健自

京都大学

大学院情報学研 Tensor network calculation on two-dimensional quantum spinmodels究科

Kenji Harada

Kyoto University

186

動的スケーリングの改良と非平衡緩和データの高
尾関
精度解析

之康

電気通信大学

情報理工学研究 Improvement of dynamical scaling and accurate analysis of
nonequilibrium relaxation data科

Yukiyasu Ozeki

he University
of ElectroCommunications

187

格子自由度と相互作用する一次元スピン系の量子
諏訪
相転移

秀麿

東京大学

大学院理学系研 Quantum phase transitions of one-dimensional spin systems
coupling with lattice degrees of freedom
究科

Hidemaro Suwa

The University ofTokyo

大学院工学系研
Characterization of thermal transport at nanostructure interface Junichiro Shiomi
究科

The University ofTokyo

188 ナノ構造界面での熱輸送特性の評価

塩見

淳一郎

東京大学

189 摩擦の物理松川宏

青山学院大学理
工学部

Physics of friction

Hiroshi Matsukawa

Aoyama Gakuin
University

190

磁気秩序相と格子秩序相の競合する量子相転移に諏訪対するスペクトル解析

秀麿

東京大学

大学院理学系研 Spectral analysis of quantum phase transition between
competitive magnetic order and lattice order phases
究科

Hidemaro Suwa

The University of
Tokyo

191

微細横溝加工を施した鉛直平板を流れる凝縮液膜
足立
流の熱輸送特性高弘

秋田大学

工学資源学部機 Heat transfer characteristics of condensate film flow along
vertical plates with microscopic grooves
械工学科

Takahiro Adachi

Akita University

192

並列 MPS 法の GPU 高速化とそのフラストレーシ五十嵐
ョン系への応用

東京大学

情報基盤センタ GPU parallelization of MPS algorithm and its application tovarious frustrated systemsー

Ryo Igarashi

The University of
Tokyo

193

シェル・モデルを用いた強誘電体の分子動力学シ
橋本
ミュレーション

保産業技術総合研究所

tamotsu hashimoto

AIST

194

動的スケーリングの改良と非平衡緩和データの高
尾関
精度解析

之康

電気通信大学

情報理工学研究 Improvement of dynamical scaling and accurate analysis of
nonequilibrium relaxation data科

Yukiyasu Ozeki

The University
of ElectroCommunications

195

細胞間接着による細胞集団運動制御のシミュレー
松下
ション

勝義

大阪大学

Katsuyoshi
大学院理学研究
Simulation of cell-cell adhesion control of collective cell motion
Matsushita科

Osaka University

康平

東京大学

大学院工学系研Study on numerical mathod to solve n-beam Takagi equation
究科

The University of
Tokyo

孝

大阪大学

大学院理学研究 Numerical study of the one-dimensional quantum spin systems
Takashi Tonegawa
with spatial structures
科

Kobe University

草部

浩一

大阪大学

大学院基礎工学
Simulation of quantum response of graphene quantum devices Koichi Kusakabe
研究科

Osaka University

フラストレート量子スピン鎖の磁場中スピンダイ
大西
ナミクス

弘明

日本原子力研究 先端基礎研究セ Spin dynamics of frustrated quantum spin chain in magnetic
field
開発機構
ンター

Hiroaki Onishi

JAEA

員弘

愛媛大学

Kazuhiro Fuchizaki

Ehime University

196 N 波高木方程式の数値解法の研究

沖津亮

197 空間構造をもつ一次元量子スピン系の数値的研究 利根川
198 グラフェン量子素子デバイスの応答評価計算
199

200 融解現象とポリアモルフィズム

渕崎Molecular dynamics simulation of ferroelectrics using a shellmodel

理工学研究科

Melting phenomena and polyamorphism

Kouhei Okitsu

No.

課題名

201 相転移における流体力学的効果３

氏名

所属

Title

Name

Organization

Hajime Tanaka

The University ofTokyo

Takeshi Inaoka

University of Ryukyus

田中

肇

東京大学

生産技術研究所 Hydrodynamic effects on phase ordering 3202

固体表面の低次元電子系及びナノ粒子の有限電子
稲岡系の新規物性

毅

琉球大学

理学部

203

ハニカム格子磁性体を用いた非自明な磁気現象に下川関する数値的研究

統久朗

大阪大学

大学院理学研究 Numerical study of the novel magnetic phenomenon on thehoneycomb magnetism
科

Tokuro Shimokawa

Osaka University

寺尾

貴道

岐阜大学

工学部

Takamichi Terao

Gifu University

細胞間接着と細胞極性が生み出す集団運動のシミ
松下ュレーション勝義

大阪大学

大学院理学研究 Simulation of collective migrations induced by the cell-celladhesion and the cell polarity
科

Katsuyoshi
Matsushita

Osaka University

204 半導体ナノ結晶に関する数値的研究
205

Novel properties of low-dimensional electron systems at solid
surfaces and finite electron systems in nanoparticles

Numerical study of semiconductor nanocrystals

206 融解現象とポリアモルフィズム

渕崎

員弘

愛媛大学

理工学研究科

Melting phenomena and polyamorphism

Kazuhiro Fuchizaki

Ehime University

207 半導体ナノ結晶に関する数値的研究

寺尾

貴道

岐阜大学

工学部

Numerical study of semiconductor nanocrystals

Takamichi Terao

Gifu University

208 地震の統計モデルの数値シミュレーション

川村

光

大阪大学

大学院理学研究
Numerical simulations on statistical models of earthquakes
科

Hikaru Kawamura

Osaka University

209 テンソルネットワーク法の並列プログラム開発

森田

悟史

東京大学

物性研究所

Satoshi Morita

The University ofTokyo

210 地震の統計モデルの数値シミュレーション

川村

光

大阪大学

大学院理学研究
Numerical simulations on statistical models of earthquakes
科

Hikaru Kawamura

Osaka University

Parallelization of tensor network method

ISSP Activity Report 2015

151

211

量子モンテカルロ法を用いたフォノン輸送におけ加藤る多体効果の数値研究

岳生

東京大学

物性研究所

212

周期的に相分離する流体混合系中のヤヌス粒子の
荒木
自発的運動

武昭

京都大学

大学院理学研究 Self-propelled motion of a Janus particle in periodically phaseseparating mixtures
科

213

多成分剛体球の稠密充填状態の並列 WangLanadu 法による探索

能川

知昭

東邦大学

医学部

Search of close packing states of multicomponent hard-sphereTomoaki Nogawa
systems by the parallelized Wang-Landau sampling

Toho University

214

ブリージングパイロクロア反強磁性体における格青山
子歪みの効果和司

大阪大学

大学院理学研究 Spin-lattice coupling effects in Heisenberg antiferromagnets on
Kazushi Aoyama
breathing pyrochlore lattices
科

Osaka University

215

厳密対角化パッケージ Rokko による Heisenberg坂下Kitaev 模型の研究

達哉

東京大学

物性研究所

Study of Heisenberg-Kitaev model by exact diagonalization
package Rokko

Tatsuya Sakashita

The University of
Tokyo

216

両親媒性溶液中におけるミセル形状転移の分子シ
藤原
ミュレーション研究進

京都工芸繊維大 大学院工芸科学 Molecular simulation study of micellar shape transition in
amphiphilic solution
学
研究科

Susumu Fujiwara

Kyoto Instituteof
Technology

217

低レイノルズ数非ブラウン粒子懸濁液の吸収状態
佐野
転移と粘弾性の関係

雅己

東京大学

Numerical research of many-body effects on phonon transport
Takeo Kato
by a quantum Monte Carlo method
Takeaki Araki

大学院理学系研 Absorbing phase transition and viscoleasticity of Non-Brownian
Masaki Sanosuspension in low Reynolds number fluid
究科

The University ofTokyo
Kyoto University

The University of
Tokyo

152

No.

課題名

氏名

所属

Title

Name

Organization

孝

神戸大学

大学院理学研究 Numerical study of the one-dimensional quantum spin systems
Takashi Tonegawa
with spatial structures
科

Kobe University

鈴木

秀幸

東京大学

大学院情報理工
Analysis of deterministic Monte Carlo algorithms
学系研究科

Hideyuki Suzuki

The University of
Tokyo

220

微細横溝加工を施した鉛直平板を流れる凝縮液膜
足立
流の熱輸送特性高弘

秋田大学

工学資源学部機 Heat transfer characteristics of condensate film flow along
vertical plates with microscopic grooves
械工学科

Takahiro Adachi

Akita University

221

X 線 n 波動力学理論によるタンパク質結晶構造解
沖津
析法の研究

康平

東京大学

大学院工学系研 Study on protein crystal structure analysis using X-ray n-beam
dynamical diffraction theory
究科

Kouhei Okitsu

The University of
Tokyo

安田

千寿

琉球大学

理学部

Chitoshi Yasuda

University of Ryukyus

223 １次元フラストレート量子スピン系の数値的研究 飛田

和男

埼玉大学

大学院理工学研 Numerical study of one dimensional frustrated quantum spin
systems
究科

Kazuo Hida

Saitama University

高密剛体球系の非平衡相転移と大規模分子動力学
礒部
シミュレーション雅晴

名古屋工業大学

Nonequilibirum phase transition in the large scale dense hard
sphere molecular dynamics simulation

Masaharu Isobe

Nagoya Institute ofTechnology

218 空間構造をもつ一次元量子スピン系の数値的研究 利根川

ISSP Activity Report 2015

219 決定論的モンテカルロ計算アルゴリズムの解析

222 格子の自由度と結合した量子スピン系の相転移

224

Phase transition in quantum spin systems coupled to lattice
degrees of freedom

225 スケールフリーネットワークにおける相転移

城真範

産業技術総合研究所

Phase transition on scale-free networks 2Masanori Shiro

AIST

226 スケールフリーネットワークにおける相転移

城真範

産業技術総合研究所

Phase transition on scale-free networks

Masanori Shiro

AIST

No.

課題名

氏名

所属

Title

Name

Organization

平成 27 年度 スーパーコンピュータ CMSI 戦略課題一覧 / CMSI Project List of Supercomputer system 2015
No.

課題名

氏名

所属

Title

Name

Organization

前期 / First Term

ISSP Activity Report 20151

分子における電子の動的過程と多体量子動力学

高塚

和夫

東京大学

大学院総合文化 Nonadiabatic electron dynamics and many-body nuclear
dynamics in molecules
研究科

Kazuo Takatsuka

The University of
Tokyo

2

電子格子相互作用と電子間相互作用の絡み合いに今田
よって駆動される強相関電子系の超伝導

正俊

東京大学

大学院工学系研 Superconducting mechanism driven by both electron-phononand strong electron correlations
究科

Masatoshi Imada

The University of
Tokyo

3

強相関電子系の励起ダイナミクスの研究遠山貴巳

東京理科大学

理学部

Study of excitation dynamics in strongly correlated electron
systems

Takami Tohyama

Tokyo University of
Science4

量子モンテカルロ法・テンソルネットワーク法に川島よる新しい量子相・量子臨界現象に関する研究

直輝

東京大学

物性研究所

Study of novel quantum phases and critical phenomena bymonte carlo method and tensor network

Naoki Kawashima

The University of
Tokyo

5

ナノ構造の電子状態から機械的性質までのマルチ
尾形
スケールシミュレーション

修司

名古屋工業大学 工学部

Multi-scale simulation of nano-structured materials fromelectronic to mechanical properties

Shuji Ogata

Nagoya Institute ofTechnology6

密度汎関数法によるナノ構造時空場での電子機能
押山
予測とその実現淳

東京大学

大学院工学系研 Density-functional study on prediction of electronic properties
Atsushi Oshiyamaof spatiotemporal fields in nanostructures
究科

The University of
Tokyo

7

新物質探索のための第一原理計算手法開発とその
常行
応用

真司

東京大学

大学院理学系研 Development and application of first-principles simulations for
Shinji Tsuneyuki
new materials exploration
究科

The University of
Tokyo

8

スピントロニクス / マルチフェロイックスの応用斎藤へ指向した材料探索

峯雄

金沢大学

理工研究域

Kanazawa University9

密度汎関数法によるナノ構造時空場での電子機能
信定
予測とその実現克幸

分子科学研究所

Institute for Molecular
理論・計算分子 Prediction of electronic properties in spatiotemporal nano-field
Katsuyuki Nobusada
based on the density functional theory
Science
科学研究領域10

全原子シミュレーションによるウィルスの分子科
岡崎
学の展開

進

名古屋大学

大学院工学研究
Molecular science of virus by all-atom simulation
科

Susumu Okazaki

Nagoya University

11

太陽電池における光電変換の基礎過程の研究と変山下
換効率最適化にむけた大規模数値計算

晃一

東京大学

大学院工学系研 Large scale calculations on the fundamental processes of solar
Koichi Yamashita
cells and their optimization in conversion efficiency
究科

The University ofTokyo

Materials design for spintronics/multiferroics applications

Mineo Saito

12 エネルギー変換の界面科学

杉野

修

東京大学

物性研究所

Interface science on energy conversion

Osamu Sugino

The University ofTokyo

13 バイオマス利用のための酵素反応解析

吉田

紀生

九州大学

大学院理学研究
Analysis of enzymatic reaction for biomass energy creation
科

Norio Yoshida

Kyushu University

153

14

電位制御可能な第一原理分子動力学計算に基づく
大谷
蓄電デバイス系界面のシミュレーション

実

産業技術総合研 ナノシステム研 First-principles simulations of electrode-electrolyte interfaces in
Minoru Otani
secondary batteries with a bias-control technique
究所
究部門

15

ナノクラスターから結晶までの機能性材料の全電
大野子スペクトルとダイナミクス

かおる

横浜国立大学

大学院工学研究 All electron spectra and dynamics of functional materials from
Kaoru Ohno
nanoclusters to crystals
院

AIST
Yokohama National
University

154

No.

課題名

氏名

所属

Title

Name

Organization

兵庫県立大学

大学院物質理学
Computational-science study of frustrated magnets
研究科

Hiroki Nakano

University of Hyogo

毅

東京大学

物性研究所

Tsuyoshi Okubo

The University of
Tokyo

今田

正俊

東京大学

Ab initio calculation of high-temperature superconducting
大学院工学系研mechanism - Comparison of cuprates and iron-based
究科
superconductors

Masatoshi Imada

The University of
Tokyo

遠山

貴巳

東京理科大学

理学部

Study of excitation dynamics in strongly correlated electron
systems

Takami Tohyama

Tokyo University of
Science20

量子モンテカルロ法による新しい量子相・量子臨
川島
界現象に関する研究

直輝

東京大学

物性研究所

Monte carlo study of novel quantum phases and criticalphenomena

Naoki Kawashima

The University of
Tokyo

21

ナノ構造の電子状態から機械的性質までのマルチ
尾形
スケールシミュレーション

修司

名古屋工業大学 工学部

Multi-scale simulation of nano-structured materials fromelectronic to mechanical properties

Shuji Ogata

Nagoya Institute ofTechnology

22

密度汎関数法によるナノ構造時空場での電子機能
押山
予測とその実現淳

東京大学

大学院工学系研 Density-functional study on prediction of electronic properties
Atsushi Oshiyamaof spatiotemporal fields in nanostructures
究科

The University of
Tokyo

常行 真司

東京大学

大学院理学系研
Highly accurate calculation of impurity hydrogen in oxides
究科

Shinji Tsuneyuki

The University ofTokyo

Mineo Saito

Kanazawa University

16 フラストレート磁性体の計算科学的研究

ISSP Activity Report 2015

17

中野

博生

フラストレート磁性体におけるトポロジカル励起
大久保
の秩序化

Ordering of topological excitations of the frustrated magnets

後期 / Latter Term18高温超伝導機構の第一原理計算
系超伝導体の比較—銅酸化物と鉄19 強相関電子系の励起ダイナミクスの研究

23 酸化物中の不純物水素の高精度計算
24

スピントロニクス / マルチフェロイックスの応用斎藤へ指向した材料探索

峯雄

金沢大学

理工研究域

25

密度汎関数法によるナノ構造時空場での電子機能
信定
予測とその実現克幸

分子科学研究所

Institute for Molecular
理論・計算分子Prediction of electronic properties in spatiotemporal nano-field Katsuyuki Nobusada
Science
科学研究領域26

全原子シミュレーションによるウィルスの分子科
岡崎
学の展開

進

名古屋大学

大学院工学研究
based on the density functional theory
科

Susumu Okazaki

Nagoya University

美博

産業技術総合研 ナノ材料研究部 Large scale computational simulations of non-equilibriumtransport phenomena
究所門

Yoshihiro Asai

AIST

修

東京大学

物性研究所

紀生

九州大学

大学院理学研究
Analysis of enzymatic reaction for biomass energy creation
科

27 非平衡輸送現象の大規模計算シミュレーション
28

浅井

蓄電池電極—電解質界面現象の原子スケール描像
杉野の確立

29 バイオマス利用のための酵素反応解析

吉田Materials design for spintronics/multiferroics applications

Structure and functionality of electrode-electrolyte interface inOsamu Sugino
battery30

高性能リチウムイオン電池開発に向けた基礎的研
大谷究実

産業技術総合研 ナノシステム研 First-principlemolecular dynamics study toward a highperformance Li-ion battery
究所
究部門

31

ナノクラスターから結晶までの機能性材料の全電
大野子スペクトルとダイナミクス

かおる

横浜国立大学

The University of
Tokyo

Norio Yoshida

Kyushu University

Minoru Otani

AIST

大学院工学研究 All electron spectra and dynamics of functional materials from
Kaoru Ohno
nanoclusters to crystals
院

Yokohama National
University

No.

課題名

32 フラストレート磁性体の計算科学的研究
33

氏名
中野

フラストレート磁性体におけるトポロジカル励起
大久保
の秩序化

博生
毅

所属

Title

Name

Organization

兵庫県立大学

大学院物質理学
Computational-science study of frustrated magnets
研究科

Hiroki Nakano

University of Hyogo

東京大学

物性研究所

Tsuyoshi Okubo

The University ofTokyo

Ordering of topological excitations of the frustrated magnets

ISSP Activity Report 2015155

Publications
Division of New Materials Science
Takigawa group
We have been performing nuclear magnetic resonance experiments on various quantum spin systems and strongly correlated
electron systems to explore novel quantum phases with exotic ordering and fluctuation phenomena. The major achievementsin the year 2015 include: (1) Investigation by 31P-NMR of the quasi two dimensional antiferromagnet RbMoOPO4Cl with thefrustrating nearest neighbor and the next nearest neighbor interactions that lead to the identification of a stripe type antiferromagnetic order. (2) Combined studies of 7Li-NMR and neutron scattering experiments on the breathing pyrochlore antiferromagnet Li(Ga,In)Cr4O8, in particular the observation of a second order phase transition in the In 5% doped sample. (3) Investigation of spin dynamics in the quantum spin ice compound Pr2Zr2O7 by 91Zr-NQR/NMR that revealed contrasting behavior
when a magnetic field is applied along <001> and <111>.
1.

†

2.

*

3.

†

Real Space Imaging of Spin Polarons in Zn-Doped SrCu2(BO3)2: M. Yoshida, H. Kobayashi, I. Yamauchi, M.
Takigawa, S. Capponi, D. Poilblanc, F. Mila, K. Kudo, Y. Koike and N. Kobayashi, Phys. Rev. Lett. 114 (2015) 056402(1-5).

4.

*

5.

*

Structural anomalies and short-range magnetic correlations in the orbitally degenerate system Sr2VO4: I. Yamauchi, K.
Nawa, M. Hiraishi, M. Miyazaki, A. Koda, K. M. Kojima, R. Kadono, H. Nakao, R. Kumai, Y. Murakami, H. Ueda, K.
Yoshimura and M. Takigawa, Phys. Rev. B 92 (2015) 064408(1-7).
One-Third Magnetization Plateau with a Preceding Novel Phase in Volborthite: H. Ishikawa, M. Yoshida, K. Nawa, M.
Jeong, S. Kramer, M. Horvatic, C. Berthier, M. Takigawa, M. Akaki, A. Miyake, M. Tokunaga, K. Kindo, J. Yamaura, Y.
Okamoto and Z. Hiroi, Phys. Rev. Lett. 114 (2015) 227202(1-5).

Single crystal 27Al-NMR study of the cubic Γ3 ground doublet system PrTi2Al20: T. Taniguchi, M. Yoshida, H. Takeda,
M. Takigawa, M. Tsujimoto, A. Sakai, Y. Matsumoto and S. Nakatsuji, J. Phys.: Conf. Ser. 683 (2016) 012016(1-9).
Site-selective 11B NMR studies on YbAlB4: S. Takano, M. S. Grbic, K. Kimura, M. Yoshida, M. Takigawa, E. C. T. O.
Farrell, K. Kuga, S. Nakatsuji and H. Harima, J. Phys.: Conf. Ser. 683 (2016) 012008(1-6).

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
2015. (1) Field and temperature variations of the specific heat C(H,T) of the heavy fermion superconductor URu2Si2 (Tc=
1.4 K) were examined at temperatures down to 200 mK. The occurrence of quasiparticle excitations due to the Doppler-shifteffect was detected regardless of the field direction in C(H), implying the presence of a line node. Furthermore, the polar-angledependence of the specific heat C(θ) under a rotating magnetic field within the ac plane exhibits a shoulder-like anomaly at θ ∼45° and a sharp dip at θ = 90° (H // a) in the moderate-field region. These features are supported by theoretical analyses basedon microscopic calculations assuming the gap symmetry of kz(kx+iky), whose gap structure is characterized by a combinationof a horizontal line node at the equator and point nodes at the poles. The present results have settled the previous controversy
over the gap structure of URu2Si2 and have authenticated its chiral d-wave superconductivity. (2) We examined low-temperaturemagnetic properties of a new verdazyl radical crystal α-2-Cl-4-F-V. Molecular orbital calculations predict that this material isa spin-1/2 quasi-one-dimensional antiferromagnet. The magnetization curve at 0.1 K shows gapless behavior like conventional
one-dimensional quantum spin systems and saturates at about 5 T. A peak is observed in the temperature dependence of theheat capacity at 0 T, indicating that a three-dimensional ordering occurs at about 0.2 K. On the other hand, the temperaturedependence of the magnetization at various magnetic fields shows an anomaly similar to that observed in many of gapped spin
systems. This behavior is attributed to the highly frustrated nature of the interchain interactions.
1.

*

Field Evolution of Quantum Critical and Heavy Fermi-Liquid Components in the Magnetization of the Mixed Valence
Compound β-YbAlB4: Y. Matsumoto, K. Kuga, Y. Karaki, Y. Shimura, T. Sakakibara, M. Tokunaga, K. Kindo and S.
Nakatsuji, J. Phys. Soc. Jpn. 84 (2015) 024710(1-7).
* Joint research among groups within ISSP.

156

ISSP Activity Report 2015

2.

†

3.

†*

4.

†

5.

†

6.

*

7.

Field-Induced Quantum Criticality and Universal Temperature Dependence of the Magnetization of a Spin-1/2 Heisenberg Chain: Y. Kono, T. Sakakibara, C. P. Aoyama, C. Hotta, M. M. Turnbull, C. P. Landee and Y. Takano, Phys. Rev.
Lett. 114 (2015) 037202(1-5).

8.

Field-Orientation Dependence of Low-Energy Quasiparticle Excitations in the Heavy-Electron Superconductor UBe13:
Y. Shimizu, S. Kittaka, T. Sakakibara, Y. Haga, E. Yamamoto, H. Amitsuka, Y. Tsutsumi and K. Machida, Phys. Rev.
Lett. 114 (2015) 147002(1-5).

9.

†*Observation of a New Ordered Phase in the Kondo Semiconductor CeOs4Sb12: T. Tayama, W. Ohmachi, M. Wansawa,
D. Yutani, T. Sakakibara, H. Sugawara and H. Sato, J. Phys. Soc. Jpn. 84 (2015) 104701(1-6).
Pauli-limited superconductivity and antiferromagnetism in the heavy-fermion compound CeCo(In1−xZnx)5: M.
Yokoyama, H. Mashiko, R. Otaka, Y. Sakon, K. Fujimura, K. Tenya, A. Kondo, K. Kindo, Y. Ikeda, H. Yoshizawa, Y.
Shimizu, Y. Kono and T. Sakakibara, Phys. Rev. B 92 (2015) 184509(9).
Quantum phase near the saturation field in the S = 1/2 frustrated spin ladder: H. Yamaguchi, H. Miyagai, Y. Kono, S.
Kittaka, T. Sakakibara, K. Iwase, T. Ono, T. Shimokawa and Y. Hosokoshi, Phys. Rev. B 91 (2015) 125104(1-5).
S = 1/2 ferromagnetic-antiferromagnetic alternating Heisenberg chain in a zinc-verdazyl complex: H. Yamaguchi,
Y. Shinpuku, T. Shimokawa, K. Iwase, T. Ono, Y. Kono, S. Kittaka, T. Sakakibara and Y. Hosokoshi, Phys. Rev. B 91
(2015) 085117(1-6).
Unstable spin-ice order in the stuffed metallic pyrochlore Pr2+xIr2-xO7−δ: D. E. MacLaughlin, O. O. Bernal, L. Shu, J.
Ishikawa, Y. Matsumoto, J. -J. Wen, M. Mourigal, C. Stock, G. Ehlers, C. L. Broholm, Y. Machida, K. Kimura, S. Nakatsuji, Y. Shimura and T. Sakakibara, Phys. Rev. B 92 (2015) 054432(1-12).

Antiferromagnetic Transition in a Novel Star-Shaped High-Spin Fe(III) Tetranuclear Cluster from a Mononuclear
Coordination Anion Featuring π-Extended Schiff Base Ligands: K. Takahashi, K. Kawamukai, T. Mochida, T. Sakurai,
H. Ohta, T. Yamamoto, Y. Einaga, H. Mori, Y. Shimura, T. Sakakibara, T. Fujisawa, A. Yamaguchi and A. Sumiyama,
Chem. Lett. 44 (2015) 840-842.

10. *Antiferromagnetic transition of the caged compound TmTi2Al20: N. Kase, Y. Shimura, S. Kittaka, T. Sakakibara, S.
Nakatsuji, T. Nakano, N. Takeda and J. Akimitsu, J. Phys.: Conf. Ser. 592 (2015) 012052(1-5).
11. †Experimental Realization of a Quantum Pentagonal Lattice: H. Yamaguchi, T. Okubo, S. Kittaka, T. Sakakibara, K.
Araki, K. Iwase, N. Amaya, T. Ono and Y. Hosokoshi, Sci. Rep. 5 (2015) 15327(1-6).
12. †First-order ferromagnetic transition of quantum spin ice system Yb2Ti2O7: Y. Yasui, N. Hamachi, Y. Kono, S. Kittaka
and T. Sakakibara, SPIN 5 (2015) 154002(1-6).
13. Low temperature magnetic properties of a new quasi-one-dimensional organic magnet α-2-Cl-4-F-V: Y. Kono, S.
Kittaka, T. Sakakibara, H. Yamaguchi and Y. Hosokoshi, Phys. Procedia 75 (2015) 679-686.
14. Evidence for chiral d-wave superconductivity in URu2Si2 from the field-angle variation of its specific heat: S. Kittaka,
Y. Shimizu, T. Sakakibara, Y. Haga, E. Yamamoto, Y. Onuki, Y. Tsutsumi, T. Nomoto, H. Ikeda and K. Machida, J. Phys.
Soc. Jpn. 85 (2016) 033704(1-4).
15. Field-induced phase transitions and magnetoferroelectricity in the perfect triangular lattice antiferromagnet
RbFe(MoO4)2 in a vertical magnetic field: H. Mitamura, R. Watanuki, N. Onozaki, Y. Amou, Y. Kono, S. Kittaka, Y.
Shimura, I. Yamamoto, K. Suzuki and T. Sakakibara, J. Magn. Magn. Mater. 400 (2016) 70-72.
16. First-order superconducting transition of Sr2RuO4 investigated by magnetization and magnetic torque: S. Kittaka, A.
Kasahara, T. Sakakibara, D. Shibata, S. Yonezawa, Y. Maeno, K. Tenya and K. Machida, J. Magn. Magn. Mater. 400(2016) 81-83.
17. Heat capacity measurements on UBe13 in rotated magnetic fields: anisotropic response in the normal state and theabsence of nodal quasiparticles: Y. Shimizu, S. Kittaka, T. Sakakibara, Y. Haga, E. Yamamoto, H. Amitsuka, Y. Tsutsumi
and K. Machida, J. Magn. Magn. Mater. 400 (2016) 52-55.
18. †Unconventional S = 2 alternating chain realized by a metal-radical hybrid-spin approach: H. Yamaguchi, Y. Shinpuku,
Y. Kono, S. Kittaka, T. Sakakibara, M. Hagiwara, T. Kawakami, K. Iwase, T. Ono and Y. Hosokoshi, Phys. Rev. B 93
(2016) 115145(1-7).
19. †Quadrupole Order in the Frustrated Pyrochlore Tb2+xTi2-xO7+y: H. Takatsu, S. Onoda, S. Kittaka, A. Kasahara, Y. Kono,
T. Sakakibara, Y. Kato, B. Fâk, J. Ollivier, J. W. Lynn, T. Taniguchi, M. Wakita and H. Kadowaki, Phys. Rev. Lett. 116(2016) 217201(1-6).

† Joint research with outside partners.

ISSP Activity Report 2015157

20. †Possible observation of highly itinerant quantum magnetic monopoles in the frustrated pyrochlore Yb2Ti2O7: Y.
Tokiwa, T. Yamashita, M. Udagawa, S. Kittaka, T. Sakakibara, D. Terazawa, Y. Shimoyama, T. Terashima, Y. Yasui, T.
Shibauchi and Y. Matsuda, Nat. Commun. 7 (2016) 10807(1-6).
21. †Quadrupole order in the frustrated pyrochlore magnet Tb2Ti2O7: H. Takatsu, T. Taniguchi, S. Kittaka, T. Sakakibara
and H. Kadowaki, J. Phys.: Conf. Series 683 (2016) 012022(1-6).
22. *Low-Energy Excitations and Ground State Selection in Quantum Breathing Pyrochlore Antiferromagnet
Ba3Yb2Zn5O11: T. Haku, K. Kimura, Y. Matsumoto, M. Soda, M. Sera, D. Yu, R. A. Mole, T. Takeuchi, S. Nakatsuji, Y.
Kono, T. Sakakibara, L. -J. Chang and T. Masuda, Phys. Rev. B (2016), in print.

Mori group
We have successfully developed and unvailed unprecedented functional properties for the molecular materials. The
major achievements in 2015 are (1) to discover the peculiar hydrogen-bond-dynamics-based switching of conductivity
and magnetism triggered by deuterium and charge transfers in the hydrogen-bond-unit for the purely organic conductor
κ-D3(Cat-EDT-ST)2 , (2) to develop the novel donor-acceptor-type molecular dyad with small HOMO-LUMO gap, and (3)to develop the chiral molecular conductors composed of chiral BEDT-TTF derivatives with hydrogen bonds, α'-[(R,R)-BEDTTTF(CH2OH)2]2ClO4(H2O). The introduction of a large variety of molecule degree of freedom to solid promises the development of new trends in functional molecular materials.
1.

Dynamics of Charge Ordering in the Nonlinear Regime of θ-(BEDT-TTF)2CsZn(SCN)4: M. Abdel-Jawad, I. Terasaki, T.
Mori and H. Mori, J. Phys. Soc. Jpn. 84 (2015) 033707(1-4).

2.

†

3.

†*

4.

Unexpected Formation of ortho-Benzoquinone-fused Tetraselenafulvalene (TSF): Synthesis, Structures, and Propertiesof a Novel TSF-based Donor–Acceptor Dyad: A. Ueda, H. Kamo and H. Mori, Chem. Lett. 44 (2015) 1538-1540.

5.

Modulation of a Molecular π-Electron System in a Purely Organic Conductor that Shows Hydrogen-Bond-DynamicsBased Switching of Conductivity and Magnetism: A. Ueda, A. Hatakeyama, M. Enomoto, R. Kumai, Y. Murakami and
H. Mori, Chem. - Eur. J. 21 (2015) 15020-15028.

6.

Synthesis of racemic and chiral BEDT-TTF derivatives possessing hydroxy groups and their achiral and chiral chargetransfer complexes: S. J. Krivickas, C. Hashimoto, J. Yoshida, A. Ueda, K. Takahashi, J. D. Wallis and H. Mori,
Beilstein J. Org. Chem. 11 (2015) 1561-1569.

7.

Novel electronic ferroelectricity in an organic charge-order insulator investigated with terahertz-pump optical-probe
spectroscopy: H. Yamakawa, T. Miyamoto, T. Morimoto, H. Yada, Y. Kinoshita, M. Sotome, N. Kida, K. Yamamoto, K.
Iwano, Y. Matsumoto, S. Watanabe, Y. Shimoi, M. Suda, H. M. Yamamoto, H. Mori and H. Okamoto, Sci. Rep. 6 (2016)
20571(1-10).

8.

有機結晶における新機能物性開拓 ―π 電子と水素の協奏―: 森 初果 , Mol. Sci. 9 (2015) A0081.

Phase-change memory function of correlated electrons in organic conductors: H. Oike, F. Kagawa, N. Ogawa, A. Ueda,
H. Mori, M. Kawasaki and Y. Tokura, Phys. Rev. B 91 (2015) 041101(R)(1-4).
Antiferromagnetic Transition in a Novel Star-Shaped High-Spin Fe(III) Tetranuclear Cluster from a Mononuclear
Coordination Anion Featuring π-Extended Schiff Base Ligands: K. Takahashi, K. Kawamukai, T. Mochida, T. Sakurai,
H. Ohta, T. Yamamoto, Y. Einaga, H. Mori, Y. Shimura, T. Sakakibara, T. Fujisawa, A. Yamaguchi and A. Sumiyama,
Chem. Lett. 44 (2015) 840-842.

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 2015. (1) We discovered the first example of an antiferromagnet that exhibits
the anomalous Hall effect at room temperature, the chiral antiferromagnet Mn3Sn (2) The quantum criticality at ambientpressure in β-YbAlB4 is found robust against pressure, and possibly forms a strange metal phase. In addition, this phase is
separated from a magnetic criticality by a Fermi liquid phase stabilized under pressure (3) A field induced quantum metalinsulator transition was found in the pyrochlore iridate Nd2Ir2O7, when the field is applied only along the narrow angle range
close to [100]. (4) A Fermi node at the quadratic band touching in Pr2Ir2O7 was found and indicates that Pr2Ir2O7 should beviewed as a mother compound for various topological phases in the correlated electron system, such as Weyl semimetals, andtopological insulators.

* Joint research among groups within ISSP.

158

ISSP Activity Report 2015

1.

Conduction electron spin resonance in the α-Yb1-xFexAlB4 (0 ≤ x ≤ 0.50) and α-LuAlB4 compounds: L. Holanda, G.
Lesseux, E. Magnavita, R. Ribeiro, S. Nakatsuji, K. Kuga, Z. Fisk, S. Oseroff, R. Urbano, C. Rettori and P. Pagliuso, J.
Phys.: Condens. Matter 27 (2015) 255601(1-5).

2.

*

3.

†*

4.

Magnetization Anomaly due to the Non-Coplanar Spin Structure in NiS2: T. Higo and S. Nakatsuji, J. Phys. Soc. Jpn. 84(2015) 053702(1-5).

5.

*

6.

Field-induced quadrupolar quantum criticality in PrV2Al20: Y. Shimura, M. Tsujimoto, B. Zeng, L. Balicas, A. Sakai and
S. Nakatsuji, Phys. Rev. B 91 (2015) 241102(1-5).

7.

Large trigonal-field effect on spin-orbit coupled states in a pyrochlore iridate: D. Uematsu, H. Sagayama, T. Arima, J. J.
Ishikawa, S. Nakatsuji, H. Takagi, M. Yoshida, J. Mizuki and K. Ishii, Phys. Rev. B 92 (2015) 094405.

8.

Optical evidence for a Weyl semimetal state in pyrochlore Eu2Ir2O7: A. B. Sushkov, J. B. Hofmann, G. S. Jenkins, J.
Ishikawa, S. Nakatsuji, S. Das Sarma and H. D. Drew, Phys. Rev. B 92 (2015) 241108(1-4).

9.

*

Field Evolution of Quantum Critical and Heavy Fermi-Liquid Components in the Magnetization of the Mixed Valence
Compound β-YbAlB4: Y. Matsumoto, K. Kuga, Y. Karaki, Y. Shimura, T. Sakakibara, M. Tokunaga, K. Kindo and S.
Nakatsuji, J. Phys. Soc. Jpn. 84 (2015) 024710(1-7).
Magnetic Order in the Frustrated Ising Quasi-One Dimensional Compound NaCo(acac)3 · Benzene: Y. Karaki, K.
Kuga, K. Kimura, S. Nakatsuji, K. Matsubayashi and Y. Uwatoko, J. Phys. Soc. Jpn. 84 (2015) 084708(1-5).

X-ray Absorption Spectroscopy in the Heavy Fermion Compound α-YbAlB4 at High Magnetic Fields: T. T. Terashima,
Y. H. Matsuda, K. Kuga, S. Suzuki, Y. Matsumoto, S. Nakatsuji, A. Kondo, K. Kindo, N. Kawamura, M. Mizumaki and
T. Inami, J. Phys. Soc. Jpn. 84 (2015) 114715(1-4).

Unstable spin-ice order in the stuffed metallic pyrochlore Pr2+xIr2-xO7−δ: D. E. MacLaughlin, O. O. Bernal, L. Shu, J.
Ishikawa, Y. Matsumoto, J. -J. Wen, M. Mourigal, C. Stock, G. Ehlers, C. L. Broholm, Y. Machida, K. Kimura, S. Nakatsuji, Y. Shimura and T. Sakakibara, Phys. Rev. B 92 (2015) 054432(1-12).

10. Spin Fluctuations from Hertz to Terahertz on a Triangular Lattice: Y. Nambu, J. S. Gardner, D. E. MacLaughlin, C.
Stock, H. Endo, S. Jonas, T. J. Sato, S. Nakatsuji and C. Broholm, Phys. Rev. Lett. 115 (2015) 127202(1-5).
11. High-Field Multi-Frequency ESR in the Rare-Earth Spinel Compound CdYb2S4: D. Yoshizawa, T. Kida, S. Nakatsuji,
K. Iritani, M. Halim, T. Takeuchi and M. Hagiwara, Appl. Magn. Reson. 46 (2015) 0937-9347.
12. Large anomalous Hall effect in a non-collinear antiferromagnet at room temperature: S. Nakatsuji, N. Kiyohara and T.
Higo, Nature 527 (2015) 212-215.
13. 電子軌道の量子ゆらぎによる新しい超伝導 : 松本 洋介 , パリティ 30-7 (2015) 2-6.
14. Anisotropic transverse magnetoresistivity in α-YbAlB4: Y. Matsumoto, J. Hong, K. Kuga and S. Nakatsuji, J. Phys.:Conf. Ser. 592 (2015) 012086(1-6).
15. Anomalous Enhancement of Seebeck Coefficient in Pr-Based 1-2-20 System with Non-Kramers Doublet Ground States:
Y. Machida, T. Yoshida, T. Ikeura, K. Izawa, A. Nakama, R. Higashinaka, Y. Aoki, H. Sato, A. Sakai, S. Nakatsuji, N.
Nagasawa, K. Matsumoto, T. Onimaru and T. Takabatake, J. Phys.: Conf. Ser. 592 (2015) 012025(1-9).
16. Anomalous specific heat behaviour in the quadrupolar Kondo system PrV2Al20: M. Tsujimoto, Y. Matsumoto and S.
Nakatsuji, J. Phys.: Conf. Ser. 592 (2015) 012023.
17. *Antiferromagnetic transition of the caged compound TmTi2Al20: N. Kase, Y. Shimura, S. Kittaka, T. Sakakibara, S.
Nakatsuji, T. Nakano, N. Takeda and J. Akimitsu, J. Phys.: Conf. Ser. 592 (2015) 012052(1-5).
18. *High Pressure Measurements of the Resistivity of β-YbAlB4: T. Tomita, K. Kuga, Y. Uwatoko and S. Nakatsuji, J.
Phys.: Conf. Ser. 592 (2015) 012019(1-5).
19. Shubnikov-de Haas Oscillation in the cubic Γ3-based heavy fermion superconductor PrV2Al20: Y. Shimura, M. Tsujimoto, A. Sakai, B. Zeng, L. Balicas and S. Nakatsuji, J. Phys.: Conf. Ser. 592 (2015) 012026(1-4).
20. *Synchrotron X-ray spectroscopy study on the valence state and magnetization in α-YbAl1-xFexB4 (x = 0.115) at low
temperatures and high magnetic fields: T. Terashima, Y. H. Matsuda, K. Kuga, S. Suzuki, Y. Matsumoto, S. Nakatsuji, A.
Kondo, K. Kindo, N. Kawamura, M. Mizumaki and T. Inami, J. Phys.: Conf. Ser. 592 (2015) 012020 (6 pages).

† Joint research with outside partners.

ISSP Activity Report 2015159

21. †*Quadratic Fermi Node in a 3D Strongly Correlated Semimetal: T. Kondo, M. Nakayama, R. Chen, J. J. Ishikawa, E.
-G. Moon, T. Yamamoto, Y. Ota, W. Malaeb, H. Kanai, Y. Nakashima, Y. Ishida, R. Yoshida, H. Yamamoto, M. Matsunami, S. Kimura, N. Inami, K. Ono, H. Kumigashira, S. Nakatsuji, L. Balents and S. Shin, Nat. Commun. 6 (2015)
10042 (1-8).
22. Foreword: Y. j. Kao, S. Onoda and S. Nakatsuji, SPIN 5 (2015) 1502001 (2 pages).
23. Special Issue on Quantum Spin Ice and Liquid in Geometrically Frustrated Magnets: Y. Kao, S. Onoda and S. Nakatsuji,
SPIN 5 (2015) 1540001-1540006.
24. Unconventional Quantum Criticality in β-YbAlB4 Detached from Its Magnetically Ordered Phase: T. Tomita, K. Kuga,
Y. Uwatoko, P. Coleman and S. Nakatsuji, Phys. Procedia 75 (2015) 482-487.
25. *Field-induced quantum metal–insulator transition in the pyrochlore iridate Nd2Ir2O7: Z. Tian, Y. Kohama, T. Tomita, H.
Ishizuka, T. H. Hsieh, J. J. Ishikawa, K. Kindo, L. Balents and S. Nakatsuji, Nature Phys. 12 (2015) 134-139.
26. Pressure-Induced Local Structural Changes in Heavy Fermion β-YbAlB 4: Y. Sakaguchi, S. Ikeda, K. Kuga, S. Suzuki,
S. Nakatsuji, N. Hirao, Y. Ohishi and H. Kobayashi, J. Phys. Soc. Jpn. 85 (2016) 023602(1-4).
27. Chemical and orbital fluctuations in Ba3CuSb2O9: Y. Wakabayashi, D. Nakajima, Y. Ishiguro, K. Kimura, T. Kimura,
S. Tsutsui, A. Q. R. Baron, K. Hayashi, N. Happo, S. Hosokawa, K. Ohwada and S. Nakatsuji, Phys. Rev. B 93 (2016)
245117(1-13).
28. Dimensional Reduction in Quantum Dipolar Antiferromagnets: P. Babkevich, M. Jeong, Y. Matsumoto, I. Kovacevic,
A. Finco, R. Toft-Petersen, C. Ritter, M. Månsson, S. Nakatsuji and H. M. Rønnow, Phys. Rev. Lett. 116 (2016) 197202(1-5).
29. *Experimental exploration of novel semimetal state in strong anisotropic Pyrochlore iridate Nd2lr2O7 under highmagnetic field: Z. M. Tian, Y. Kohama, T. Tomita, J. Ishikawa, H. Mairo, K. Kindo and S. Nakatsuji, J. Phys.: Conf. Ser.
683 (2016) 012024(1-6).
30. *Frustrated magnetism in a Mott insulator based on a transition metal chalcogenide: S. Kawamoto, T. Higo, T. Tomita,
S. Suzuki, Z. M. Tian, K. Mochitzuki, A. Matsuo, K. Kindo and S. Nakatsuji, J. Phys.: Conf. Ser. 683 (2016) 012025(1-4).
31. *Single crystal 27Al-NMR study of the cubic Γ3 ground doublet system PrTi2Al20: T. Taniguchi, M. Yoshida, H. Takeda,
M. Takigawa, M. Tsujimoto, A. Sakai, Y. Matsumoto and S. Nakatsuji, J. Phys.: Conf. Ser. 683 (2016) 012016(1-9).
32. *Site-selective 11B NMR studies on YbAlB4: S. Takano, M. S. Grbic, K. Kimura, M. Yoshida, M. Takigawa, E. C. T. O.
Farrell, K. Kuga, S. Nakatsuji and H. Harima, J. Phys.: Conf. Ser. 683 (2016) 012008(1-6).
33. Absence of Jahn-Teller transition in the hexagonal Ba3CuSb2O9 single crystal: N. Katayama, K. Kimura, Y. Han, J.
Nasu, N. Drichko, Y. Nakanishi, M. Halim, Y. Ishiguro, R. Satake, E. Nishibori, M. Yoshizawa, T. Nakano, Y. Nozue, Y.
Wakabayashi, S. Ishihara, M. Hagiwara, H. Sawa and S. Nakatsuji, Proc. Natl. Acad. Sci. U.S.A. 112 (2015) 9305-9309.
34. Spin dynamics of the triangular-lattice antiferromagnet NiGa2S4 over an extended timescale: Y. Nambu, J. S. Gardner,
D. E. MacLaughlin, C. Stock, H. Endo, S. Jonas, T. J. Sato, S. Nakatsuji and C. Broholm, Phys. Rev. Lett. 115 (2015)
127202(1-5).
35. *Low-Energy Excitations and Ground State Selection in Quantum Breathing Pyrochlore Antiferromagnet
Ba3Yb2Zn5O11: T. Haku, K. Kimura, Y. Matsumoto, M. Soda, M. Sera, D. Yu, R. A. Mole, T. Takeuchi, S. Nakatsuji, Y.
Kono, T. Sakakibara, L. -J. Chang and T. Masuda1, Phys. Rev. B (2016), in print.

Division of Condensed Matter Theory
Takada group
Employing several standard techniques including the Green's-function method, quantum Monte Carlo simulations, band-structure calculations, and various types of variational approaches, we are studying several aspects of quantum many-body problems
in condensed matter physics, based primarily on the first-principles Hamiltonian. This year we have studied the following
issues: (1) The failure of the conventional self-consistent GW approximation in the calculation of both normal and superconducting properties is made clear by comparing the results among the G0W0 (one-shot GW), GW, and GWΓ approximations. (2)Diffusion Monte Carlo (DMC) simulations are performed on the system of an atom embedded in an electron gas with a viewof investigating Kondo physics from first principles. A detailed analysis of the Friedel oscillations around the impurity atom
* Joint research among groups within ISSP.

160

ISSP Activity Report 2015

reveals that a proton-embedded electron gas can exhibit the Kondo temperature well beyond 1000 K. The obtained accurate
electron-density profile is used to improve on the GGA-PBE version of the exchange-correlation energy functional in thedensity functional theory. In making this improvement, we have paid special attention to fulfilling the cusp theorem at the atomsite. The improved functional will be applied to a wide range of topics in the future, including the phase diagram of the solidhydrogen under high pressures. (3) With proposing a better functional form for the vertex function Γ, always satisfying boththe Ward identity and the momentum conservation law, we study the low-density electron gas in the GWΓ scheme to find ananomalous mass reduction as a result of avoiding the collapse of the normal state into a spontaneously excited electron-hole
pair condensed state. Concomitantly with this mass reduction, an anomalous behavior of the momentum distribution function isfound for the density parameter rs around 20.
1.

Emergence of a Kondo singlet state with Kondo temperature well beyond 1000 K in a proton-embedded electron gas: Y.
Takada, R. Maezono and K. Yoshizawa, Phys. Rev. B 92 (2015) 155140(1-11).

2.

Generic Features of an Electron Injected into the Luttinger Liquid: H. Maebashi and Y. Takada, J. Supercond. Nov.
Magn. 28 (2015) 1331-1335.

3.

Role of the ward identity and relevance of the G0W0 approximation in normal and superconducting states: Y. Takada,Mol. Phys. 114 (2016) 1.

4.

Theory for Reliable First-Principles Prediction of the Superconducting Transition Temperature: Y. Takada, in: Carbonbased New Superconductors: Toward high-Tc superconductivity (ISBN 978-981-4303-30-9 (Hardcover), 978-981-430331-6 (eBook)), Ch 8, edited by J. Haruyama, (Pan Stanford Publishing Pte. Ltd., 2015), pp. 193-230.

5.

Reference Module in Materials Science and Materials Engineering: Y. Takada, in: Materials Science and Materials
Engineering, edited by S. Mahfoudh and M. Nicholls, (Elsevier, 2016), B9780128035818007748.

Oshikawa group
We studied a wide range of fundamental problems in condensed matter theory and statistical mechanics. In particular, we
discovered that even trivial phases, which are adiabatically connected to a product state without any entanglement, are notunique in the presence of an appropriate symmetry. We discussed a simple example of S = 1 quantum spin chain with asymmetry under a combined operation of the site-centered lattice inversion and the global π-rotation about z axis. In this model,
there are two trivial phases, adiabatically connected to the Néel state and the large-D state (product of Sz=0 states), which arealways separated by a quantum phase transition in the presence of the above symmetry. We demonstrated this using field theory,
numerical calculation, and a general proof based on Matrix Product State representation. The present result brings about a newperspective in classification of quantum phases, a central issue in current condensed matter physics.
1.

Equilibrium surface current and role of U(1) symmetry: Sum rule and surface perturbations: Y. Tada, Phys. Rev. B 92
(2015) 104502(1-15).

2.

†

3.

†

4.

†

5.

†

6.

Gravitational Casimir Effect: J. Q. Quach, Phys. Rev. Lett. 114 (2015) 081104(1-5).

7.

†

Selection of factorizable ground state in a frustrated spin tube: Order by disorder and hidden ferromagnetism: X. Plat,
Y. Fuji, S. Capponi and P. Pujol, Phys. Rev. B 91 (2015) 064411 (1-21).
Spin fluctuations and superconductivity in layered f-electron superlattices: Y. Tada and R. Peters, Phys. Rev. B 92
(2015) 035129(1-8).
Absence of Quantum Time Crystals: H. Watanabe and M. Oshikawa, Phys. Rev. Lett. 114 (2015) 251603(1-5).

Distinct Trivial Phases Protected by a Point-Group Symmetry in Quantum Spin Chains: Y. Fuji, F. Pollmann and M.
Oshikawa, Phys. Rev. Lett. 114 (2015) 177204.

Orbital Angular Momentum and Spectral Flow in Two-Dimensional Chiral Superfluids: Y. Tada, W. Nie and M.
Oshikawa, Phys. Rev. Lett. 114 (2015) 195301.

8. 「物性物理学」～物質に潜む普遍的概念～ : 押川 正毅 , 数理科学 620 (2015) 40-45.
9.

Foldy-Wouthuysen transformation of the generalised Dirac Hamiltonian in a gravitational-wave background: J. Q.
Quach, Physical Review D 92 (2015) 084047.

10. †Flux quench in a system of interacting spinless fermions in one dimension: Y. O. Nakagawa, G. Misguich and M.
Oshikawa, Phys. Rev. B 93 (2016) 174310.
11. †Magnetism and superconductivity in ferromagnetic heavy-fermion system UCoGe under in-plane magnetic fields: Y.
Tada, S. Takayoshi and S. Fujimoto, Phys. Rev. B 93 (2016) 174512(1-7).
† Joint research with outside partners.

ISSP Activity Report 2015161

12. †Plaquette order in the SU(6) Heisenberg model on the honeycomb lattice: P. Nataf, M. Lajkó, P. Corboz, A. M. Läuchli,
K. Penc and F. Mila, Phys. Rev. B 93 (2016) 201113(R)(1-6).
13. Spin gravitational resonance and graviton detection: J. Q. Quach, Physical Review D 93 (2016) 104048(1-6).
14. † ウラン系強磁性超伝導における強磁性ゆらぎが誘起するスピン三重項超伝導 : 石田 憲二 , 服部 泰佑 , 佐藤 憲昭 , 出口
和彦 , 多田 靖啓 , 藤本 聡 , 固体物理 50 (2015) 123-132.
15. 量子異常と物性物理 ( 特集 物理科学 , この 1 年 ) - ( 素粒子物理 ): 押川 正毅 , パリティ 31 (2016) 43-45.
16. 物性物理と場の量子論 ～場の量子論が明かす双対性～ : 押川 正毅 , 数理科学 633 (2016) 41-46.

Tsunetsugu group
We have studied optical conductivity near an antiferromagnetic phase transition in the square-lattice Hubbard model at halffilling using the cluster dynamical-mean field approach. We investigated the effects of vertex corrections on optical conductivity and found that they have large contributions and change some important features of optical conductivity. The vertex
corrections enhance frequency dependence of conductivity in both metallic and insulating phaes. Another important discovery
is the presence of a temperature region above the transition temperature where dc conductivity shows non-increasing behavior
with lowering temperature. This is not due to a pseudogap behavior, but the electron spectral function does not show a dip
at Fermi energy. (Reference: arXiv:1605.00387) We have continued the study of quadrupole order in Pr 1-2-20 system. We
used a classical Monte Carlo calculation to investigate the effects of thermal fluctuations in temperature-magnetic field phase
diagram. We found that the same number of ordered phases appear as predicted by our previous mean-field analysis, but thephase boundaries are strongly modified by thermal fluctuations and have a different topology. A new tetracritical point appears
when magnetic field is applied along (001) direction. Criticality of parasitic ferro quadrupole order is also investigated, and wehave found an unusual critical behavior in their temperature dependence. (Reference arXiv:1605.05175) We have also studied an
antiferromagnetic Heisenberg model on breathing pyrochlore lattice, and found that the ground state in the S = 3/2 case has aninteresting "dimerized" pattern that differs from the previously studied S = 1/2 case.
1.

Fano resonance through Higgs bound states in tunneling of Nambu-Goldstone modes: T. Nakayama, I. Danshita, T.
Nikuni and S. Tsuchiya, Phys. Rev. A 92 (2015) 043610(1-19).

2.

Dynamical Characteristics of the Mott Transition: Examination of Doublon Dynamics in a Triangular-lattice Hubbard
Model: T. Sato and H. Tsunetsugu, Physics Procedia 75 (2015) 376-382.

Sugino group
We have done first-principles study of the excited-states, ferroelectric interfaces, electrochemical interfaces, and the groundstate wavefunctions. We have improved our GW+ BSE program of excited-state calculation so as to manipulate large numberof atoms (∼200 atoms), which has significantly activated collaboration with experiments. We also advanced density functional
methods to compute the electrically biased interface, which are used to investigate the system of negative capacitance as well as
the electrochemical reactions. We further developed a variational approach to strongly correlated electron systems to investigate
the structure of the many-body wavefunction.
1.

All-electron GW+Bethe-Salpeter calculations on small molecules: D. Hirose, Y. Noguchi and O. Sugino, Phys. Rev. B
91 (2015) 205111.

2.

†

3.

Symmetry breaking and excitonic effects on optical properties of defective nanographenes: Y. Noguchi and O. Sugino, J.
Chem. Phys. 142 (2015) 064313.

4.

Configuration interaction with antisymmetrized geminal powers: W. Uemura, S. Kasamatsu and O. Sugino, Phys. Rev.
A 91 (2015) 062504.

5.

*

6.

*

7.

†

First-principles calculation of charged capacitors under open-circuit conditions using the orbital-separation approach:
S. Kasamatsu, S. Watanabe and S. Han, Phys. Rev. B 92 (2015) 115124.

Vibronic Structures in Absorption and Fluorescence Spectra of Firefly Oxyluciferin in Aqueous Solutions: M. Hiyama,
Y. Noguchi, H. Akiyama, K. Yamada and N. Koga, Photochem. Photobiol. 91 (2015) 819.
First-Principles Investigation of Strong Excitonic Effects in Oxygen 1s X-ray Absorption Spectra: Y. Noguchi, M.
Hiyama, H. Akiyama, Y. Harada and N. Koga, J. Chem. Theory Comput. 11 (2015) 1668-1673.
TOMBO: All-electron mixed-basis approach to condensed matter physics: S. Ono, Y. Noguchi, R. Sahara, Y. Kawazoe
and K. Ohno, Comput. Phys. Commun. 189 (2015) 20.

* Joint research among groups within ISSP.

162

ISSP Activity Report 2015

8.

*

9.

†

Pressure dependence of the magnetic ground states in MnP: M. Matsuda, F. Ye, S. E. Dissanayake, J. -G. Cheng, S.
Chi, J. Ma, H. D. Zhou, J. -Q. Yan, S. Kasamatsu, O. Sugino, T. Kato, K. Matsubayashi, T. Okada and Y. Uwatoko,
Phys. Rev. B 93 (2016) 100405(1-5).
Emergence of Negative Capacitance in Multidomain Ferroelectric-Paraelectric Nanocapacitors at Finite Bias: S.
Kasamatsu, S. Watanabe, C. S. Hwang and S. Han, Adv. Mater. 28 (2016) 335.

Kato group
The main research subject of our laboratory is theory of non-equilibrium properties in nanoscale devices. We have studied (1)photon-assisted current noises under strong AC fields in quantum dot systems, (2) a multi-orbital Anderson impurity at high bias
voltages, and (3) non-equilibrium current noises of quantum dots in the Kondo regime. We have also studied form factors of the
Kondo model by the Bethe ansatz method.
1.

Effects of Coulomb interaction on photon-assisted current noise through a quantum dot: T. J. Suzuki and T. Kato, Phys.
Rev. B 91 (2015) 165302(1-12).

2.

Exact Green’s function for a multiorbital Anderson impurity at high bias voltages: A. Oguri and R. Sakano, Phys. Rev. B
91 (2015) 115429(1-14).

3.

Universality of non-equilibrium fluctuations in strongly correlated quantum liquids: M. Ferrier, T. Arakawa, T. Hata, R.
Fujiwara, R. Delagrange, R. Weil, R. Deblock, R. Sakano, A. Oguri and K. Kobayashi, Nature Phys. 12 (2015) 230-235.

Division of Nanoscale ScienceIye group
Electronic transport in monolayer graphene grown on vicinal surface of 6H-SiC(0001) with a quasi-regular step-and-terrace
structure is studied. Conductivity under a magnetic field normal to the plane showed a high degree of anisotropy. The quantum
Hall effect (QHE) with zero resistance manifests itself for the current along the steps, whereas the QHE is obscured bypronounced positive magnetoresistance with quadratic magnetic-field dependence for the current across the steps.
1.

†

2.

†*

Ballistic transport in graphene antidot lattices: R. Yagi, R. Sakakibara, R. Ebisuoka, J. Onishi, K. Watanabe, T.
Taniguchi and Y. Iye, Phys. Rev. B 92 (2015) 195406(1-6).
Highly Anisotropic Parallel Conduction in the Stepped Substrate of Epitaxial Graphene Grown on Vicinal SiC: A.
Endo, F. Komori, K. Morita, T. Kajiwara and S. Tanaka, J. Low Temp. Phys. 179 (2015) 237-250.

Katsumoto group
Conductance fluctuation in InAs two-dimensional electrons versus in-plane magnetic field was found and attributed to the signof so called "Zitterbewegung" (trembling motion) due to spin-orbit coupling. We have succeeded in making low resistancesemiconductor-superconductor junctions not only for InAs two-dimensional electrons but also for a diluted magnetic semiconductor (In,Fe)As. Anomalous response in the latter will be our next subject.
1.

†

Gate-Tunable Atomically Thin Lateral MoS2 Schottky Junction Patterned by Electron Beam: Y. Katagiri, T. Nakamura,
A. Ishii, C. Ohata, M. Hasegawa, S. Katsumoto, T. Cusati, A. Fortunelli, G. Iannaccone, G. Fiori, S. Roche and J.
Haruyama, Nano Lett. 16 (2016) 3788-3794.

Otani group
We have studied on three topics including spin Hall effect, spin diffusion length, and magnonic crystals.
1.

Tunable configurational anisotropy in collective magnetization dynamics of Ni80Fe20 nanodot arrays with varying dot
shapes: B. K. Mahato, S. Choudhury, R. Mandal, S. Barman, Y. Otani and A. Barman, J. Appl. Phys. 117 (2015) 213909.

2.

Tunable spin wave spectra in two-dimensional Ni80Fe20 antidot lattices with varying lattice symmetry: R. Mandal, S.
Barman, S. Saha, Y. Otani and A. Barman, J. Appl. Phys. 118 (2015) 053910.

3.

Crossover between spin swapping and Hall effect in disordered systems: H. B. M. Saidaoui, Y. Otani and A. Manchon,
Phys. Rev. B 92 (2015) 024417.
† Joint research with outside partners.

ISSP Activity Report 2015

163

4.

Revisiting the measurement of the spin relaxation time in graphene-based devices: H. Idzuchi, A. Fert and Y. Otani,
Phys. Rev. B 91 (2015) 241407.

5.

Spin relaxation mechanism in a highly doped organic polymer film: M. Kimata, D. Nozaki, Y. Niimi, H. Tajima and Y.
Otani, Phys. Rev. B 91 (2015) 224422.

6.

Strong Suppression of the Spin Hall Effect in the Spin Glass State: Y. Niimi, M. Kimata, Y. Omori, B. Gu, T. Ziman, S.
Maekawa, A. Fert and Y. Otani, Phys. Rev. Lett. 115 (2015) 196602.

7.

スピン軌道相互作用の強い導体中のスピンホール効果 : 大谷 義近 , 新見 康洋 , 固体物理 50 (2015) 575-590.

8.

Spin relaxation characteristics in Ag nanowire covered with various oxides: S. Karube, H. Idzuchi, K. Kondou, Y.
Fukuma and Y. Otani, Appl. Phys. Lett. 107 (2015) 122406.

9.

Selective mode excitation in three-chained magnetic vortices: N. Hasegawa, S. Sugimoto, H. Fujimori, K. Kondou, Y.
Niimi and Y. Otani, Appl. Phys. Express 8 (2015) 063005-1.

10. Reciprocal spin Hall effects in conductors with strong spin–orbit coupling: a review: Y. Niimi and Y. Otani, Rep. Prog.
Phys. 78 (2015) 124501.
11. Spin transport in non-magnetic nano-structures induced by non-local spin injection: H. Idzuchi, Y. Fukuma and Y. Otani,
Physica E: Low-dimensional Systems and Nanostructures 68 (2015) 239.
12. Realization of a micrometre-scale spin-wave interferometer: O. Rousseau, B. Rana, R. Anami, M. Yamada, K. Miura, S.
Ogawa and Y. Otani, Sci. Rep. 5 (2015) 9873.
13. Quasiparticle-mediated spin Hall effect in a superconductor: T. Wakamura, H. Akaike, Y. Omori, Y. Niimi, S. Takahashi,
A. Fujimaki, S. Maekawa and Y. Otani, Nature Mater. 14 (2015) 675.
14. Tunable picosecond spin dynamics in two dimensional ferromagnetic nanodot arrays with varying lattice symmetry: S.
Saha, S. Barman, S. Sugimoto, Y. Otani and A. Barman, RSC Adv. 5 (2015) 34027.
15. All-optical investigation of tunable picosecond magnetization dynamics in ferromagnetic nanostripes with a width down
to 50 nm: S. Saha, S. Barman, Y. Otani and A. Barman, Nanoscale 7 (2015) 18312.

Komori group
Reproducible dependence of the STM images on the distance between the surface and the STM tip apex for a monatomic layerof iron nitride (Fe2N) formed on a Cu(001) surface was found in the bias-voltage range corresponding to the Fe 3d states. The
results are attributed to a shift in surface orbitals detected by the tip from the d states to the sp states. Electronic structures of the
Pt-adsorbed Ge(001) surface with a one-dimensional atomic structure were studied by high-resolution ARPES and SARPES.
One-dimensional Fermi surfaces of four surface states were confirmed by ARPES. One of them is spin-split due to the Rashba
effect.
1.

†

2.

*

Scanning tunneling spectroscopy study of quasiparticle interference on dual topological insulator Bi 1-xSbx: S.
Yoshizawa, F. Nakamura, A. A. Taskin, T. Iimori, K. Nakatsuji, I. Matsuda, Y. Ando and F. Komori, Phys. Rev. B 91
(2015) 045423(1-6).

3.

†*

4.

†*

5.

†*

6.

†*

Nonlinear terahertz field-induced carrier dynamics in photoexcited epitaxial monolayer graphene: H. A. Hafez, I.
Al-Naib, M. M. Dignam, Y. Sekine, K. Oguri, F. Blanchard, D. G. Cooke, S. Tanaka, F. Komori, H. Hibino and T. Ozaki,
Phys. Rev. B 91 (2015) 035422 (1-9).

Highly Anisotropic Parallel Conduction in the Stepped Substrate of Epitaxial Graphene Grown on Vicinal SiC: A.
Endo, F. Komori, K. Morita, T. Kajiwara and S. Tanaka, J. Low Temp. Phys. 179 (2015) 237-250.
フェムト秒域時間分解光電子分光法によるグラフェンの超高速キャリアダイナミクスの追跡 Tracing Ultrafast Carrier
Dynamics in Graphene with Femtosecond Time-resolved Photoemission Spectroscopy: 染谷 隆史 , 吹留 博一 , 石田 行
章 , 吉田 力矢 , 山本 達 , 板谷 治郎 , 小森 文夫 , 辛 埴 , 松田 巌 , 表面科学 36(8) (2015) 418-423.

Layer number dependence of carrier lifetime in graphenes observed using time-resolved mid-infrared luminescence:
H. Watanabe, T. Kawasaki, T. Iimori, F. Komori and T. Suemoto, Chem. Phys. Lett. 637 (2015) 58-62.
Selective Formation of Zigzag Edges in Graphene Cracks: M. Fujihara, R. Inoue, R. Kurita, T. Taniuchi, Y. Motoyui,
S. Shin, F. Komori, Y. Maniwa, H. Shinohara and Y. Miyata, ACS Nano 9 (2015) 9027-9033.

* Joint research among groups within ISSP.

164

ISSP Activity Report 2015

7.

†*

8.

*

9.

Orbital Selectivity in Scanning Tunneling Microscopy: Distance-Dependent Tunneling Process Observed in Iron
Nitride: Y. Takahashi, T. Miyamachi, K. Ienaga, N. Kawamura, A. Ernst and F. Komori, Phys. Rev. Lett. 116 (2016)056802(1-5).

One-dimensional metallic surface states of Pt-induced atomic nanowires on Ge(001): K. Yaji, S. Kim, I. Mochizuki,
Y. Takeichi, Y. Ohtsubo, P. L. Fèvre, F. Bertran, A. Taleb-Ibrahimi, S. Shin and F. Komori, J. Phys.: Condens. Matter 28(2016) 284001(1-9).
High-resolution three-dimensional spin- and angle-resolved photoelectron spectrometer using vacuum ultraviolet laser
light: K. Yaji, A. Harasawa, K. Kuroda, S. Toyohisa, M. Nakayama, Y. Ishida, A. Fukushima, S. Watanabe, C. Chen, F.
Komori and S. Shin, Rev. Sci. Instrum. 87 (2016) 053111(1-6).

10. †*Spin Polarization and Texture of the Fermi Arcs in the Weyl Fermion Semimetal TaAs: S.-Y. Xu, I. Belopolski, D.
S. Sanchez, M. Neupane, G. Chang, K. Yaji, Z. Yuan, C. Zhang, K. Kuroda, G. Bian, C. Guo, H. Lu, T.-R. Chang, N.
Alidoust, H. Zheng, C.-C. Lee, S.-M. Huang, C.-H. Hsu, H.-T. Jeng, A. Bansil, T. Neupert, F. Komori, T. Kondo, S.
Shin, H. Lin, S. Jia and M. Zahid Hasan, Phys. Rev. Lett. 116 (2016) 096801(1-7).
11. Ribbon-Like Nanopattern Formed on Nitrogen-Adsorbed Vicinal Cu(001): M. Yamada, N. Kawamura, K. Nakatsuji and
F. Komori, e-J. Surf. Sci. Nanotech. 14 (2016) 43-46.
12. *Photoelectrochemical water splitting enhanced by self-assembled metal nanopillars embedded in an oxide semiconductor photoelectrode: S. Kawasaki, R. Takahashi, T. Yamamoto, M. Kobayashi, H. Kumigashira, J. Yoshinobu, F.
Komori, A. Kudo and M. Lippmaa, Nat. Commun. 7 (2016) 11818(1-6).

Yoshinobu group
We conducted several research projects in the fiscal year 2015. (1) The activation and hydrogenation of CO2 on clean and
Zn-deposited Cu(111) and Cu(997) surfaces studied by AP-XPS. (2) The surface chemistry of formic acid on Zn-Cu(111)
studied by SR-PES. (3) Spectroscopic characterization of H-Cu(111), Zn-Cu(111) and Pd-Cu surfaces by XPS. (4) Spectroscopic characterization of Au on SrTiO3 under O2 exposure using SR-XPS (5) LT-STM study of CO2 on Cu(997) (6) Independently driven four-probe conductivity measurement of organic thin films.
1.

Quantitative analysis of desorption and decomposition kinetics of formic acid on Cu(111): the importance of hydrogenbonding between adsorbed species: Y. Shiozawa, T. Koitaya, K. Mukai, S. Yoshimoto and J. Yoshinobu, J. Chem. Phys.
143 (2015) 234707.

2.

Observation of Fano line shapes in infrared vibrational spectra of CO2 adsorbed on Cu(997): T. Koitaya, Y. Shiozawa, K.
Mukai, S. Yoshimoto and J. Yoshinobu, J. Chem. Phys. 144 (2016) 054703.

3.

*

4.

*

5.

The chemistry of simple alkene molecules on Si(100)c(4x2): the mechanism of cycloaddition and their selectivities: K.
Akagi and J. Yoshinobu, Surface Science (2016), accepted for publication.

Photoelectrochemical water splitting enhanced by self-assembled metal nanopillars embedded in an oxide semiconductor photoelectrode: S. Kawasaki, R. Takahashi, T. Yamamoto, M. Kobayashi, H. Kumigashira, J. Yoshinobu, F.
Komori, A. Kudo and M. Lippmaa, Nat. Commun. 7 (2016) 11818(1-6).
Real-time observation of reaction processes of CO2 on Cu(997) by ambient-pressure X-ray photoelectron spectroscopy:
T. Koitaya, S. Yamamoto, Y. Shiozawa, K. Takeuchi, R.-Y. Liu, K. Mukai, S. Yoshimoto, K. Akikubo, I. Matsuda and J.
Yoshinobu, Topic in Catalysis 59 (2016) 526-531.

Hasegawa group
We have developed spin-polarized scanning tunneling microscopy (SP-STM), which enables us to detect the orientation of
spins / magnetic moments on surfaces in atomic-scale spatial resolutions. Using the method, we investigated the formation
mechanism of spin spiral structures of Mn ultrathin films formed on a W(110) substrate. Because of the absence of inversion
symmetry due to the thin film structure and the spin-orbit interaction in the heavy-elemental substrate, the DzyaloshinskiiMoriya interaction (DMI) is exerted among the spins in the thin films, which induces chirality in the spin structures. In order toinvestigate the details of DMI, we directly measured the rotational sense of the spin spiral structures by SP-STM, and revealed
that both 1st and 2nd Mn layers exhibit chirality and the same polarization of DMI despite their different types of spin structuresand propagation directions. These results, combined with previous reports on the chirality of domain walls observed in magnetic
thin films on the same substrate, lead us to conclude that the DMI polarization is dominantly determined by the substrate.
Aiming for a bottom-up approach of fabricating quantum spin systems and their microscopic investigations, we studied theadsorption of oxygen molecules, which have a spin triplet state (S = 1) as a ground state, on a Ag(111) substrate. It was foundthat by low temperature exposure the molecules adsorb on the substrate in a physisorbed manner lying down to form a triangular† Joint research with outside partners.

ISSP Activity Report 2015165

lattice. Different from an isosceles triangular lattice expected from the ellipsoidal shape of the molecule, the lattice is deformed
to scalene. Based on a Monte Carlo calculation using parameters that account for the solid oxygen phases, we found that the
introduction of antiferromagnetic interaction among the adsorbed molecules explain the deformation quantitatively. The antiferromagnetic order indicates the preservation of the spin of the adsorbed molecules, opening up the possibility that the system
can be utilized for fabrication / construction of one- or two- dimensional spin structures using an atom / molecular manipulation
method of STM.
——
1. Disorder-induced suppression of superconductivity in the Si(111)-(√ 7 × √ 3 )-In surface: Scanning tunneling microscopy study: S. Yoshizawa, H. Kim, Y. Hasegawa and T. Uchihashi, Phys. Rev. B 92 (2015) 041410(R)(1-5).
2.

Electronic and magnetic effects of a stacking fault in cobalt nanoscale islands on the Ag(111) surface: K. Doi, E.
Minamitani, S. Yamamoto, R. Arafune, Y. Yoshida, S. Watanabe and Y. Hasegawa, Phys. Rev. B 92 (2015) 064421(1-8).

3.

Site-Dependent Evolution of Electrical Conductance from Tunneling to Atomic Point Contact: H. Kim and Y. Hasegawa,Phys. Rev. Lett. 114 (2015) 206801(1-5).

4.

バルク Cr 探針を用いた W(110) 上の Mn 薄膜のスピン偏極 STM/STS 観察 : 土師 将裕 , 吉田 靖雄 , 長谷川 幸雄 , 表面
科学 36 (2015) 403-407.

5.

†

6.

Direct visualization of surface phase of oxygen molecules physisorbed on Ag(111) surface: A two-dimensional quantum
spin system: S. Yamamoto, Y. Yoshida, H. Imada, Y. Kim and Y. Hasegawa, Phys. Rev. B 93 (2016) 081408(R)(1-5).

7.

Insensitivity of atomic point contact conductance to a moiré structure: H. Kim and Y. Hasegawa, Phys. Rev. B 93 (2016)
075409(1-6).

8.

Spatial variation in local work function as an origin of moiré contrast in scanning tunneling microscopy images of Pb
thin films / Si(111): H. Kim and Y. Hasegawa, Jpn. J. Appl. Phys. (2016), accepted for publication.
——
Superconducting proximity effect on Rashba-split Pb/Ge(111)-β√ 3 × √ 3 surface: H. Kim, Y. Miyata and Y. Hasegawa,Supercond. Sci. Technol. (2016), accepted for publication.

9.

——
Impact of Surface Conditions on the Superconductivity of Si(111)-(√ 7 × √ 3 )-In: S. Yoshizawa, H. Kim, T. Kawakami,
Y. Nagai, T. Nakayama, X. Hu, Y. Hasegawa and T. Uchihashi, e-J. Surf. Sci. Nanotech. 13 (2015) 151-154.

Lippmaa group
We work on various aspects of oxide thin films and interfaces. One of our aims is to explore novels polar oxide phases that
may exhibit new type of magnetoelectric coupling. In particular, we have looked at double perovskites that can sustain both
ferromagnetism and ferroelectricity in a strained lattice. We have continued working on magnetic interfaces, mostly looking atband alignment and magnetic coupling in manganite-titanate heterostructures. The third topic is the development of photocatalytic materials. Our recent work has involved the analysis of carrier dynamics in optically excited crystals, surface chemical
reactions, and the development of nanoscale composite materials for efficient collection of photogenerated charge in a photocatalyst.
1.

Interfacial capacitance between a ferroelectric Fe3O4 thin film and a semiconducting Nb:SrTiO3 substrate: R. Takahashi,
Y. Cho and M. Lippmaa, J. Appl. Phys. 117 (2015) 014104(1-10).

2.

A-site-driven ferroelectricity in strained ferromagnetic La2NiMnO6 thin films: R. Takahashi, I. Ohkubo, K. Yamauchi,
M. Kitamura, Y. Sakurai, M. Oshima, T. Oguchi, Y. Cho and M. Lippmaa, Phys. Rev. B 91 (2015) 134107(1-9).

3.

†

4.

Magnetic coupling at perovskite and rock-salt structured interfaces: M. Matvejeff, E. Ahvenniemi, R. Takahashi and M.
Lippmaa, Appl. Phys. Lett. 107 (2015) 141604(1-5).

5.

†

6.

*

7.

*

Determination of band diagram for a p-n junction between Mott insulator LaMnO3 and band insulator Nb:SrTiO3: M.
Kitamura, M. Kobayashi, E. Sakai, R. Takahashi, M. Lippmaa, K. Horiba, H. Fujioka and H. Kumigashira, Appl. Phys.
Lett. 106 (2015) 061605(1-5).

Photo-electrochemical epitaxy of silver-oxide clathrate Ag7O8M (M=NO3, HSO4) on rutile-type Nb-doped TiO2 single
crystals: R. Tanaka, R. Takahashi, S. Takata, M. Lippmaa and Y. Matsumoto, CrystEngComm 17 (2015) 3701-3707.
Optical pump-THz probe analysis of long-lived d-electrons and relaxation to self-trapped exciton states in MnO: J.
Nishitani, T. Nagashima, M. Lippmaa and T. Suemoto, Appl. Phys. Lett. 108 (2016) 162101(1-5).
Photoexcited d-electron dynamics in transition metal oxide MnO studied by optical pump-THz probe measurements:
J. Nishitani, T. Kurihara, A. Asahara, T. Nagashima, M. Lippmaa and T. Suemoto, Phys. Status Solidi C 13 (2016)
113-116.
* Joint research among groups within ISSP.

166

ISSP Activity Report 2015

8.

The effect of polar (111)-oriented SrTiO3 on initial perovskite growth: I. Hallsteinsen, M. Nord, T. Bolstad, P. -E.
Vullum, J. E. Boschker, P. Longo, R. Takahashi, R. Holmestad, M. Lippmaa and T. Tybell, Cryst. Growth Des. 16(2016) 2357-2362.

9.

*Photoelectrochemical water splitting enhanced by self-assembled metal nanopillars embedded in an oxide semiconductor photoelectrode: S. Kawasaki, R. Takahashi, T. Yamamoto, M. Kobayashi, H. Kumigashira, J. Yoshinobu, F.
Komori, A. Kudo and M. Lippmaa, Nat. Commun. 7 (2016) 11818(1-6).

Division of Physics in Extreme Conditions
Uwatoko groupWe report electrical resistivity, ac magnetic susceptibility and X-ray absorption spectroscopy measurements of intermediate
valence YbNi3Ga9 under pressure and magnetic field. We have revealed a characteristic pressure-induced Yb valence crossoverwithin the temperature-pressure phase diagram, and a first-order metamagnetic transition is found below Pc ∼9 GPa where thesystem undergoes a pressure-induced antiferromagnetic transition. Zirconium-based bulk metallic glass (Zr-based BMG) has
outstanding properties as a cylinder material for piston-cylinder high pressure apparatuses and is especially useful for neutron
scattering. The piston cylinder consisting of a Zr-based BMG cylinder with outer/inner diameters of 8.8/2.5 mm sustains
pressures up to 1.81 GPa and ruptured at 2.0 GPa, with pressure values determined by the superconducting temperature of lead.
We report the discovery of pressure-induced superconductivity below Tc = 14 K in the iron-based spin-ladder material BaFe2S3,
a Mott insulator with striped-type magnetic ordering below ∼120 K. Our findings indicate that iron-based ladder compounds
represent promising material platforms, in particular for studying the fundamentals of iron-based superconductivity. The
perovskite PbCrO3 is an antiferromagnetic insulator. However, the fundamental interactions leading to the insulating state in thissingle valent perovskite are unclear. We report a variety of insitu pressure measurements including electron transport properties,
X-ray absorption spectrum, and crystal structure study by X-ray and neutron diffraction. These studies reveal key information
leading to the elucidation of the physics behind the insulating state and the pressure-induced transition.
1.

†

2.

†*

3.

†

4.

†

Electrical Transport in the Quasi-Two-Dimensional Ionic Mott Insulator M2P-TCNQF4 under High Pressures: R.
Takehara, K. Miyagawa, T. Miyamoto, H. Okamoto, H. Taniguchi, K. Matsubayashi, Y. Uwatoko and K. Kanoda, J.
Phys. Soc. Jpn. 84 (2015) 104702(1-5).

5.

†

6.

†*

7.

†

8.

†

Transport and Magnetic Properties of EuAl4 and EuGa4: A. Nakamura, T. Uejo, F. Honda, T. Takeuchi, H. Harima, E.
Yamamoto, Y. Haga, K. Matsubayashi, Y. Uwatoko, M. Hedo, T. Nakama and Y. Onuki, J. Phys. Soc. Jpn. 84 (2015)
124711(1-9).

9.

Upper Critical Field, Critical Current Density and Activation Energy of the New La1−xSmxO0.5F 0.5BiS2(x= 0.2, 0.8)
Superconductors: G. K. Selvan, G. S. Thakur, K. Manikandan, Y. Uwatoko, Z. Haque, L. C. Gupta, A. K. Ganguli and S.
Arumugam, J. Phys. Soc. Jpn. 84 (2015) 124701(1-5).

Electron transport in TTF-CA under High pressures: R. Takehara, K. Miyagawa, K. Kanoda, T. Miyamoto, H. Matsuzaki, H. Okamoto, H. Taniguchi, K. Matsubayashi and Y. Uwatoko, Physica B 460 (2015) 83-87.
Anomalous Quantum Transport Properties in Semimetallic Black Phosphorus: K. Akiba, A. Miyake, Y. Akahama, K.
Matsubayashi, Y. Uwatoko, H. Arai, Y. Fuseya and M. Tokunaga, J. Phys. Soc. Jpn. 84 (2015) 073708(1-4).
Correlation between Tc and Crystal Structure in S-Doped FeSe Superconductors under Pressure: Studied by X-ray
Diffraction of FeSe0.8S0.2 at Low Temperatures: T. Tomita, H. Takahashi, H. Takahashi, H. Okada, Y. Mizuguchi, Y.
Takano, S. Nakano, K. Matsubayashi and Y. Uwatoko, J. Phys. Soc. Jpn. 84 (2015) 024713(1-8).

High Pressure Effect on the Superconductivity in VN: B. Wang, K. Matsubayashi, Y. Uwatoko and K. Ohgushi, J. Phys.
Soc. Jpn. 84 (2015) 104706(1-4).
Magnetic Order in the Frustrated Ising Quasi-One Dimensional Compound NaCo(acac)3 · Benzene: Y. Karaki, K.
Kuga, K. Kimura, S. Nakatsuji, K. Matsubayashi and Y. Uwatoko, J. Phys. Soc. Jpn. 84 (2015) 084708.
Pressure-Induced Valence Transition and Heavy Fermion State in Eu2Ni3Ge5 and EuRhSi3: A. Nakamura, T. Okazaki,
M. Nakashima, Y. Amako, K. Matsubayashi, Y. Uwatoko, S. Kayama, T. Kagayama, K. Shimizu, T. Uejo, H. Akamine,
M. Hedo, T. Nakama, Y. Onuki and H. Shiba, J. Phys. Soc. Jpn. 84 (2015) 053701(1-4).

10. Ferromagnetic superexchange in insulating Cr2MoO6 by controlling orbital hybridization: M. Zhu, D. Do, C. R. Dela
Cruz, Z. Dun, J. -G. Cheng, H. Goto, Y. Uwatoko, T. Zou, H. D. Zhou, S. D. Mahanti and X. Ke, Phys. Rev. B 92 (2015)
094419(1-6).

† Joint research with outside partners.

ISSP Activity Report 2015167

11. *Temperature and composition phase diagram in the iron-based ladder compounds Ba1−xCsxFe2Se3: T. Hawai, Y.
Nambu, K. Ohgushi, F. Du, Y. Hirata, M. Avdeev, Y. Uwatoko, Y. Sekine, H. Fukazawa, J. Ma, S. Chi, Y. Ueda, H.
Yoshizawa and T. J. Sato, Phys. Rev. B 91 (2015) 184416.
12. Pressure Induced Superconductivity on the border of Magnetic Order in MnP: J. -G. Cheng, K. Matsubayashi, W. Wu, J.
P. Sun, F. K. Lin, J. L. Luo and Y. Uwatoko, Phys. Rev. Lett. 114 (2015) 117001(1-18).
13. Pressure-Induced Valence Crossover and Novel Metamagnetic Behavior near the Antiferromagnetic Quantum Phase
Transition of YbNi3Ga9: K. Matsubayashi, T. Hirayama, T. Yamashita, S. Ohara, N. Kawamura, M. Mizumaki, N.
Ishimatsu, S. Watanabe, K. Kitagawa and Y. Uwatoko, Phys. Rev. Lett. 114 (2015) 086401(1-5).
14. Development of High-Pressure and Multi-Frequency ESR System and Its Application to Quantum Spin System: T.
Sakurai, R. Matsui, K. Kawasaki, S. Okubo, H. Ohta, K. Matsubayashi, Y. Uwatoko, K. Kudo and Y. Koike, Appl.
Magn. Reson. 46 (2015) 1007-1012.
15. †Development of High-Pressure ESR System Using Micro-coil: K. Kawasaki, T. Sakurai, E. Ohmichi, S. Okubo, H.
Ohta, K. Matsubayashi and Y. Uwatoko, Appl. Magn. Reson. 46 (2015) 987-992.
16. Zr-based bulk metallic glass as a cylinder material for high pressure apparatuses: K. Komatsu, K. Munakata, K. Matsubayashi, Y. Uwatoko, Y. Yokoyama, K. Sugiyama and M. Matsuda, High Pressure Res. 35 (2015) 254-262.
17. †Strange metal without magnetic criticality: T. Tomita, K. Kuga, Y. Uwatoko, P. Coleman and S. Nakatsuji, Science 349(2015) 506-509.
18. Charge Transfer Induced Multifunctional Transitions with Sensitive Pressure Manipulation in a Metal–Organic Framework: J. Yang, L. Zhou, J. Cheng, Z. Hu, C. Kuo, C.-W. Pao, L. Jang, J.-F. Lee, J. Dai, S. Zhang, S. Feng, P. Kong, Z.
Yuan, J. Yuan, Y. Uwatoko, T. Liu, C. Jin and Y. Long, Inorg. Chem. 54 (2015) 6433-6438.
19. †*Development of non-metallic diamond anvil cell and quantum oscillation measurement of CePt2ln7 in a pulsedmagnet: A. Miyake, Y. Kohama, S. Ohta, Y. Hirose, R. Settai, K. Matsubayashi, Y. Uwatoko, A. Matsuo, K. Kindo and
M. Tokunaga, J. Phys.: Conf. Ser. 592 (2015) 012149(1-6).
20. *High Pressure Measurements of the Resistivity of β-YbAlB4: T. Tomita, K. Kuga, Y. Uwatoko and S. Nakatsuji, J.
Phys.: Conf. Ser. 592 (2015) 012019.
21. †Development of multi-frequency ESR system for high-pressure measurements up to 2.5 GPa: T. Sakurai, K. Fujimoto,
R. Matsui, K. Kawasaki, S. Okubo, H. Ohta, K. Matsubayashi, Y. Uwatoko and H. Tanaka, J. Magn. Reson. 259 (2015)
108-113.
22. †*Pressure-induced superconductivity in the iron-based ladder material BaFe2S3: H. Takahashi, A. Sugimoto, Y. Nambu,
T. Yamauchi, Y. Hirata, T. Kawakami, M. Avdeev, K. Matsubayashi, F. Du, C. Kawashima, H. Soeda, S. Nakano, Y.
Uwatoko, Y. Ueda, T. J. Sato and K. Ohgushi, Nature Mater. 14 (2015) 1008-1012.
23. Charge disproportionation and the pressure-induced insulator–metal transition in cubic perovskite PbCrO3: J. Cheng, K.
E. Kweon, S. A. Larregola, Y. Ding, Y. Shirako, L. G. Marshall, Z. -Y. Li, X. Li, A. M. D. Santos, M. R. Suchomel, K.
Matsubayashi, Y. Uwatoko, G. S. Hwang, J. B. Goodenough and J. -S. Zhou, Proc. Natl. Acad. Sci. U.S.A. 112 (2015)
1670-1674.
24. Kondo Effect in CeXc (Xc = S, Se, Te) Studied by Electrical Resistivity Measurements under High Pressure: Y. Hayashi,
S. Takai, T. Matsumura, H. Tanida, M. Sera, K. Matsubayashi, Y. Uwatoko and A. Ochiai, J. Phys. Soc. Jpn. 85 (2016)
034704(1-7).
25. Superconducting and Fermi Surface Properties of Single Crystal Zr2Co: A. Teruya, M. Kakihana, T. Takeuchi, D. Aoki,
F. Honda, A. Nakamura, Y. Haga, K. Matsubayashi, Y. Uwatoko, H. Harima, M. Hedo, T. Nakama and Y. Onuki, J. Phys.
Soc. Jpn. 85 (2016) 034706(1-10).
26. *Pressure dependence of the magnetic ground states in MnP: M. Matsuda, F. Ye, S. E. Dissanayake, J. -G. Cheng, S.
Chi, J. Ma, H. D. Zhou, J. -Q. Yan, S. Kasamatsu, O. Sugino, T. Kato, K. Matsubayashi, T. Okada and Y. Uwatoko,
Phys. Rev. B 93 (2016) 100405(1-5).
27. Quantum Criticality Beneath the Superconducting Dome in β-YbAlB 4: T. Tomita, K. Kuga, Y. Uwatoko and S. Nakatsuji, J. Phys.: Conf. Ser. 683 (2016) 012007(1-5).
28. Magnetic and Structural Properties of Metamagnetic MnCo0.92Fe0.08Ge Compound: K. Ozono, Y. Mitsui, M. Hiroi, R. Y.
Umetsu, K. Takahashi, K. Matsubayashi, Y. Uwatoko and K. Koyama, Mater. Trans. 57 (2016) 316-320.

* Joint research among groups within ISSP.

168

ISSP Activity Report 2015

Osada group
We have systematically studied quantum Hall transport in monolayer-bilayer graphene heterojunctions on hexagonal boron
nitride substrate. It has been found that the observed asymmetric transverse and Hall resistances across the junction are wellunderstood by the Landauer-Büttiker edge transport picture assuming the pair annihilation of edge channels with opposite
chirality at the junction. We show that the above picture works well even in the system where the monolayer and bilayer regions
have different carrier density, which corresponds to the preceding work. This result demonstrates the bulk-edge correspondence
at the boundary of two quantum Hall states on different crystal and band structures. In addition, we found that fine structures
around charge neutrality points, which are considered to originate from the degeneracy breaking of zero-energy Landau levelsof monolayer and bilayer graphene.
1.

Edge State and Intrinsic Hole Doping in Bilayer Phosphorene: T. Osada, J. Phys. Soc. Jpn. 84 (2015) 013703(1-4).

2.

Electronic Structure and the Properties of Phosphorene and Few-layer Black Phosphorus: S. Fukuoka, T. Taen and T.
Osada, J. Phys. Soc. Jpn. 84 (2015) 121004(1-12).

3.

Surface Transport in the ν = 0 Quantum Hall Ferromagnetic State in the Organic Dirac Fermion System: T. Osada, J.
Phys. Soc. Jpn. 84 (2015) 053704(1-4).

Yamashita group
As a joint project with Dr. Shishido at Osaka Prefecture University, we’ve performed dHvA measurements of the heavy-fermion
superconductor CeCoIn5. We succeeded to measure clear quantum oscillation measurements of the alpha bands of CeCoIn5
down to 5 mK and up to 10 T. Unexpectedly, we found that the amplitude of the quantum oscillation is suppressed below 20
mK at 8 T (above Hc2 of CeCoIn5). At the same time, the frequency of the quantum oscillation shows a drop. These changes
can be attributed to an emergence of a new ordered phase neighboring the superconducting phase. To clarify the property of the
new phase, we started NMR measurements of CeCoIn5 at ultra-low temperatures with Takigawa group, which is still a project
under way in 2016. We’ve also measured longitudinal and transverse thermal transport measurements of a candidate material ofquantum spin liquid, Ba3CuSb2O9. We found that the longitudinal thermal conductivity is strongly suppressed in wide temperature range, showing that there are strong scatters of phonons. Further, a clear thermal Hall effect has been observed. Given that
there are no mobile spin excitations in Ba3CuSb2O9 from our measurements and NMR measurements, this thermal Hall effectis a phonon Hall effect. We believe that this work is the first systematic study of a thermal Hall effect of phonons including thetemperature dependence of the thermal Hall conductivity. We’ve performed thermal Hall measurements of Mn3Sn where thefirst observation of the anomalous Hall effect in antiferromagnetic system has been reported. A clear anomalous thermal Hall
effect has been observed. We found that the temperature dependence of the Lorentz number implies that intrinsic scatterings
play an important role for the anomalous Hall effect.

Materials Design and Characterization Laboratory
Hiroi group
One-Third Magnetization Plateau with a Preceding Novel Phase is discovered in Volborthite. We have synthesized high-quality
single crystals of volborthite, and carried out high-field magnetization measurements up to 74 T and 51V NMR measurements
up to 30 T. An extremely wide 1/3 magnetization plateau appears above 28 T and continues over 74 T at 1.4 K, which has notbeen observed in previous studies using polycrystalline samples. NMR spectra reveal an incommensurate order (most likely
a spin-density wave order) below 22 T and a simple spin structure in the plateau phase. Moreover, a novel intermediate phase
is found between 23 and 26 T, where the magnetization varies linearly with magnetic field and the NMR spectra indicate an
inhomogeneous distribution of the internal magnetic field. This sequence of phases in volborthite bears a striking similarity
to those of frustrated spin chains with a ferromagnetic nearest-neighbor coupling J1 competing with an antiferromagnetic
next-nearest-neighbor coupling J2. In addition, the metal-insulator transition (MIT) of VO2 is discussed with particular emphasison the structural instability of the rutile compounds toward dimerization. Ti substitution experiments reveal that the MIT isrobust up to 20% Ti substitutions and occurs even in extremely thin V-rich lamellas in spinodally decomposed TiO2-VO2
composites, indicating that the MIT is insensitive to hole doping and essentially takes on a local character. These observations
suggest that either electron correlation in the Mott-Hubbard sense or Peierls (Fermi-surface) instability plays a minor role on theMIT. Through a broad perspective of crystal chemistry on the rutile-related compounds, it is noted that VO2 and another MIT
compound NbO2 in the family eventually lie just near the borderline between the two structural groups with the regular rutile
structure and the distorted structures characterized by the formation of dimers with direct metal-metal bonding. It is also shownthat the two compounds of the rutile form do not follow the general trends in structure observed for the other rutile compounds,
giving clear evidence of an inherent structural instability present in the two compounds. The MITs of VO2 and NbO2 are naturalconsequences of structural transitions between the two groups, as all the d electrons are trapped in the bonding molecular† Joint research with outside partners.

ISSP Activity Report 2015

169

orbitals of dimers at low temperatures. Such dimer crystals are ubiquitously found in early transition metal compounds having
chain-like structures, such as MoBr3, NbCl4, Ti4O7, and V4O7, the latter two of which also exhibit MITs probably of the same
origin. In a broader sense, the dimer crystal is a kind of “molecular orbital crystals” in which virtual molecules made of transition metal atoms with partially-filled t2g shells, such as dimers, trimers or larger ones, are generated by metal-metal bonding andare embedded into edge- or face-sharing octahedron networks of various kinds. The molecular orbital crystallization opens anatural route to stabilization of unpaired t2g electrons in crystals.
1.

†*

2.

Large Diamagnetic Susceptibility from Petit Fermi Surfaces in LaV2Al20: T. Hirose, Y. Okamoto, J.-I. Yamaura and Z.
Hiroi, J. Phys. Soc. Jpn. 84 (2015) 113701(1-5).

3.

Magnetic Phase Diagram of the Breathing Pyrochlore Antiferromagnet LiGa1−xInxCr4O8: Y. Okamoto, G. J. Nilsen, T.
Nakazono and Z. Hiroi, J. Phys. Soc. Jpn. 84 (2015) 043707(1-5).

4.

*Competing electronic states under pressure in the double-exchange ferromagnetic Peierls system K2Cr8O16: T.
Yamauchi, K. Hasegawa, H. Ueda, M. Isobe and Y. Ueda, Phys. Rev. B 92 (2015) 165115(1-7).

5.

*

6.

†*

7.

†*

Structural stability of the Wadsley-type bronzes β-Ag0.33V2O5 and β-Li0.33V2O5 on compression: A breakdown of
the two-leg ladder system in the nonsuperconducting high-pressure phase of β-Li0.33V2O5: A. Grzechnik, Y. Ueda, T.
Yamauchi, M. Hanfland, P. Hering, V. Potapkin and K. Friese, Phys. Rev. B 91 (2015) 174113(1-8).

8.

*

9.

All-In–All-Out Magnetic Domains: X-Ray Diffraction Imaging and Magnetic Field Control: S. Tardif, S. Takeshita, H.
Ohsumi, J.-I. Yamaura, D. Okuyama, Z. Hiroi, M. Takata and T.-H. Arima, Phys. Rev. Lett. 114 (2015) 147205.

Charge Order Induced by Cation Order in δ-Ag2/3V2O5: T. Baba, T. Yamauchi, S. Yamazaki, H. Ueda, M. Isobe, Y.
Matsushita and Y. Ueda, J. Phys. Soc. Jpn. 84 (2015) 024718(1-7).

Complex magnetostructural order in the frustrated spinel LiInCr4O8: G. J. Nilsen, Y. Okamoto, T. Masuda, J. Rodriguez-Carvajal, H. Mutka, T. Hansen and Z. Hiroi, Phys. Rev. B 91 (2015) 174435(1-8).
Effects of stoichiometry and substitution in quasi-one-dimensional iron chalcogenide BaFe2S3: Y. Hirata, S. Maki, J.-I.
Yamaura, T. Yamauchi and K. Ohgushi, Phys. Rev. B 92 (2015) 205109(1-7).

Superconductivity in 122-type antimonide BaPt2Sb2: M. Imai, S. Ibuka, N. Kikugawa, T. Terashima, S. Uji, T. Yajima,
H. Kageyama and I. Hase, Phys. Rev. B 91 (2015) 014513(1-8).

10. *One-Third Magnetization Plateau with a Preceding Novel Phase in Volborthite: H. Ishikawa, M. Yoshida, K. Nawa, M.
Jeong, S. Kramer, M. Horvatic, C. Berthier, M. Takigawa, M. Akaki, A. Miyake, M. Tokunaga, K. Kindo, J. Yamaura, Y.
Okamoto and Z. Hiroi, Phys. Rev. Lett. 114 (2015) 227202(1-5).
11. *Pressure-induced Mott transition followed by a 24-K superconducting phase in BaFe2S3: T. Yamauchi, Y. Hirata, Y.
Ueda and K. Ohgushi, Phys. Rev. Lett. 115 (2015) 246402(1-5).
12. †*Semimetallic transport properties of epitaxially stabilized perovskite CaIrO3 films: D. Hirai, J. Matsuno, D. NishioHamane and H. Takagi, Appl. Phys. Lett. 107 (2015) 012104(1-4).
13. *Superconducting properties of BaTi2Pn2O (Pn = Sb, Bi): T. Yajima, K. Nakano, Y. Nozaki and H. Kageyama, Physica C
504 (2015) 36-38.
14. Na2MoO2-δF4+δ - a perovskite with a unique combination of atomic orderings and octahedral tilts: H. Ishikawa, I.
Munaò, B. E. Bode, Z. Hiroi and P. Lightfoot, Chem. Commun. 51 (2015) 15469-15471.
15. †*Theoretical and experimental evidence for the post-cotunnite phase transition in zirconia at high pressure: D. NishioHamane, H. Dekura, Y. Seto and T. Yagi, Phys. Chem. Miner. 42 (2015) 385-392.
16. †*Direct Observation of Short-Range Structural Coherence During a Charge Transfer Induced Spin Transition in a CoFe
Prussian Blue Analogue by Transmission Electron Microscopy: M. Itoi, T. Jike, D. Nishio-Hamane, S. Udagawa, T.
Tsuda, S. Kuwabata, K. Boukheddaden, M. J. Andrus and D. R. Talham, J. Am. Chem. Soc. 137 (2015) 14686-14693.
17. †*Effect of surfactant/water ratio and reagents’ concentration on size distribution of manganese carbonate nanoparticles
synthesized by microemulsion mediated route: G. Granata, F. Pagnanelli, D. Nishio-Hamane and T. Sasaki, Appl. Surf.
Sci. 331 (2015) 463-471.
18. Superconductivity in LaPd2As2 with a collapsed 122 structure: S. Ganesanpotti, T. Yajima, K. Nakano, Y. Nozaki, T.
Yamamoto, C. Tassel, Y. Kobayashi and H. Kageyama, J. Alloys Compd. 613 (2015) 370-374.
19. On the microscopic dynamics of the 'Einstein solids' AlV2Al20 and GaV2Al20, and of YV2Al20: a benchmark systemfor 'rattling' excitations: M. M. Koza, H. Mutka, Y. Okamoto, J.-I. Yamaura and Z. Hiroi, Phys. Chem. Chem. Phys. 17(2015) 24837-24850.
* Joint research among groups within ISSP.

170

ISSP Activity Report 2015

20. *Substrate-induced anion rearrangement in epitaxial thin films of LaSrCoO4−xHx: G. Bouilly, T. Yajima, T. Terashima,
Y. Kususe, K. Fujita, C. Tassel, T. Yamamoto, K. Tanaka, Y. Kobayashi and H. Kageyama, CrystEngComm 16 (2015)
9669-9674.
21. †*Ferriakasakaite-(La) and ferriandrosite-(La): new epidote-supergroup minerals from Ise, Mie Prefecture, Japan: M.
Nagashima, D. Nishio-Hamane, N. Tomita, T. Minakawa and S. Inaba, Mineral. Mag. 79 (2015) 735.
22. *Imayoshiite, Ca3Al(CO3)[B(OH)4](OH)6•12H2O, a new mineral of ettringite group from Ise City, Mie Prefecture,
Japan: D. Nishio-Hamane, M. Ohnishi, K. Momma, N. Shimobayashi, R. Miyawaki, T. Minakawa and S. Inaba,
Mineral. Mag. 79 (2015) 413-423.
23. †*Pressure-induced superconductivity in the iron-based ladder material BaFe2S3: H. Takahashi, A. Sugimoto, Y. Nambu,
T. Yamauchi, Y. Hirata, T. Kawakami, M. Avdeev, K. Matsubayashi, F. Du, C. Kawashima, H. Soeda, S. Nakano, Y.
Uwatoko, Y. Ueda, T. J. Sato and K. Ohgushi, Nature Mater. 14 (2015) 1008-1012.
24. Lifshitz metal–insulator transition induced by the all-in/all-out magnetic order in the pyrochlore oxide Cd2Os2O7: Z.
Hiroi, J. Yamaura, T. Hirose, I. Nagashima and Y. Okamoto, APL Mater. 3 (2015) 041501(1-11).
25. Spinodally decomposed nanostructures in a TiO2–VO2 crystal: Z. Hiroi, T. Yoshida, J. Yamaura and Y. Okamoto, APL
Mater. 3 (2015) 062508 (1-8).
26. * チタン酸塩化合物の高圧高温相転移 : 浜根 大輔 , SPring-8 利用研究成果集 3 (2015) 6-9.
27. †*Impurity-Induced First-Order Phase Transitions in Highly Crystalline V2O3 Nanocrystals: Y. Ishiwata, E. Takahashi,
K. Akashi, M. Imamura, J. Azuma, K. Takahashi, M. Kamada, H. Ishii, Y.-F. Liao, Y. Tezuka, Y. Inagaki, T. Kawae, D.
Nishio-Hamane, M. Nantoh, K. Ishibashi and T. Kida, Adv. Mater. Interfaces 2 (2015) 1500132(1-6).
28. Structural instability of the rutile compounds and its relevance to the metal–insulator transition of VO2: Z. Hiroi, Prog.
Solid State Chem. 43 (2015) 47-69.
29. †*Magnetic properties of Sm5Fe17 melt-spun ribbons and their borides: T. Saito and D. Nishio-Hamane, AIMS Mat. Sci.
2 (2015) 392-400.
30. †*Pressure-induced non-superconducting phase of β-Na0.33V2O5 and the mechanism of high-pressure phase transitionsin β-Na0.33V2O5 and β-Li0.33V2O5 at room temperature: A. Grzechnik, Y. Ueda, T. Yamauchi, M. Hanfland, P. Hering, V.
Potapkin and K. Friese, J. Phys.: Condens. Matter 28 (2016) 035401(1-9).
31. †*Hybrid Amine-Functionalized Graphene Oxide as a Robust Bifunctional Catalyst for Atmospheric Pressure Fixationof Carbon Dioxide using Cyclic Carbonates: V. B. Saptal, T. Sasaki, K. Harada, D. Nishio-Hamane and B. M. Bhanage,
ChemSusChem 9 (2016) 644.
32. †*Light and SEM observation of opal phytoliths in the mulberry leaf: O. Tsutsui, R. Sakamoto, M. Obayashi, S.
Yamakawa, T. Handa, D. Nishio-Hamane and I. Matsuda, Flora 218 (2016) 44-50.
33. 鉱物といふもの : 浜根 大輔 , 物理学会誌 70 (2015) 446-449.
34. * 新鉱物・宮久石の誕生について : 浜根 大輔 , 岩石鉱物科学 44 (2015) 57-59.

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 activities of 2015 include: (1) new interpretations and findingsof computational results for the SU(N) Heisenberg models with and without higher order interactions, (2) development of
quantum Monte Carlo code for Bose systems in continuous media, (3) correlation between computational hardness of the spinglass instances and the thermodynamic properties and (3) large-scale non-equilibrium molecular dynamics simulation of bubble
growth in under-pressured near-transition liquid.
1.

Quantum Spin Liquid in Spin 1/2 J1–J2 Heisenberg Model on Square Lattice: Many-Variable Variational Monte Carlo
Study Combined with Quantum-Number Projections: S. Morita, R. Kaneko and M. Imada, J. Phys. Soc. Jpn. 84 (2015)
024720(1-11).

2.

Scaling relation for dangerously irrelevant symmetry-breaking fields: T. Okubo, K. Oshikawa, H. Watanabe and N.
Kawashima, Phys. Rev. B 91 (2015) 174417(1-4).

3.

SU(N) Heisenberg model with multicolumn representations: T. Okubo, K. Harada, J. Lou and N. Kawashima, Phys.
Rev. B 92 (2015) 1344048(1-5).

† Joint research with outside partners.

ISSP Activity Report 2015

171

4.

Thermal phase transition of generalized Heisenberg models for SU(N) spins on square and honeycomb lattices: T.
Suzuki, K. Harada, H. Matsuo, S. Todo and N. Kawashima, Phys. Rev. B 91 (2015) 094414.

5.

Variational Monte Carlo method in the presence of spin-orbit interaction and its application to Kitaev and KitaevHeisenberg models: M. Kurita, Y. Yamaji, S. Morita and M. Imada, Phys. Rev. B 92 (2015) 035122(1-11).

6.

Thermal phase transitions to valence-bond-solid phase in the two dimensional; generalized SU(N) Heisenberg models:T. Suzuki, K. Harada, H. Matsuo, S. Todo and N. Kawashima, J. Phys.: Conf. Ser. 592 (2015) 012114.

7.

Tensor network algorithm by coarse-graining tensor renormalization on finite periodic lattices: H.-H. Zhao, Z.-Y. Xie, T.
Xiang and M. Imada, Phys. Rev. B 93 (2016) 125115(1-14).

Noguchi group
We have studied the membrane shape transformation in various conditions. We clarifed the following behavior: (i) The absorption of banana-shaped proteins can induce polygonal membrane tubes and polyhedral vesicles. (2) Under chemical reaction an
oil droplet can transform into vesicles via closing of a disk-like micelle. (3) At genus g >2, the vesicle shape transformationfrom stomatocyte to discocyte is a discrete transition for low reduced volume.
1.

†

2.

Shape transitions of high-genus fluid vesicles: H. Noguchi, Europhys. Lett. 112 (2015) 58004.

3.

Morphological changes of amphiphilic molecular assemblies induced by chemical reactions: K. M. Nakagawa and H.
Noguchi, Soft Matter 11 (2015) 1403-1411.

4.

Shape transformations of toroidal vesicles: H. Noguchi, A. Sakashita and M. Imai, Soft Matter 11 (2015) 193.

5.

Shape deformation of lipid membranes by banana-shaped protein rods: Comparison with isotropic inclusions andmembrane rupture: H. Noguchi, Phys. Rev. E 93 (2016) 052404(1-10).

6.

†

7.

Membrane tubule formation by banana-shaped proteins with or without transient network structure: H. Noguchi, Sci.
Rep. 6 (2016) 20935.

8.

Rheological evaluation of colloidal dispersions using the smoothed profile method: formulation and applications: J. J.
Molina, K. Otomura, H. Shiba, H. Kobayashi, M. Sano and R. Yamamoto, J. Fluid Mech. 792 (2016) 590-619.

Formation of polyhedral vesicles and polygonal membrane tubes induced by banana-shaped proteins: H. Noguchi, J.
Chem. Phys. 143 (2015) 243109.

Monte Carlo study of the frame, fluctuation and internal tensions of fluctuating membranes with fixed area: H. Shiba,
H. Noguchi and J.-B. Fournier, Soft Matter 12 (2016) 2373-2380.

Materials Synthesis and Characterization group
1.

†*

2.

Magnetic properties of Sm-Fe-N bulk magnets prepared from Sm2Fe17N3 melt-spun ribbons: T. Saito and D. NishioHamane, J. Appl. Phys. 117 (2015) 17D130.

3.

†*

4.

†*

5.

*

6.

†*

7.

*

Charge Order Induced by Cation Order in δ-Ag2/3V2O5: T. Baba, T. Yamauchi, S. Yamazaki, H. Ueda, M. Isobe, Y.
Matsushita and Y. Ueda, J. Phys. Soc. Jpn. 84 (2015) 024718(1-7).

Effects of stoichiometry and substitution in quasi-one-dimensional iron chalcogenide BaFe2S3: Y. Hirata, S. Maki, J.-I.
Yamaura, T. Yamauchi and K. Ohgushi, Phys. Rev. B 92 (2015) 205109(1-7).
Structural stability of the Wadsley-type bronzes β-Ag0.33V2O5 and β-Li0.33V2O5 on compression: A breakdown of
the two-leg ladder system in the nonsuperconducting high-pressure phase of β-Li0.33V2O5: A. Grzechnik, Y. Ueda, T.
Yamauchi, M. Hanfland, P. Hering, V. Potapkin and K. Friese, Phys. Rev. B 91 (2015) 174113(1-8).
Superconductivity in 122-type antimonide BaPt2Sb2: M. Imai, S. Ibuka, N. Kikugawa, T. Terashima, S. Uji, T. Yajima,
H. Kageyama and I. Hase, Phys. Rev. B 91 (2015) 014513(1-8).
Semimetallic transport properties of epitaxially stabilized perovskite CaIrO3 films: D. Hirai, J. Matsuno, D. NishioHamane and H. Takagi, Appl. Phys. Lett. 107 (2015) 012104(1-4).
Superconducting properties of BaTi2Pn2O (Pn = Sb, Bi): T. Yajima, K. Nakano, Y. Nozaki and H. Kageyama, Physica C
504 (2015) 36-38.

* Joint research among groups within ISSP.

172

ISSP Activity Report 2015

8.

†*

9.

†*

Theoretical and experimental evidence for the post-cotunnite phase transition in zirconia at high pressure: D. NishioHamane, H. Dekura, Y. Seto and T. Yagi, Phys. Chem. Miner. 42 (2015) 385-392.
Direct Observation of Short-Range Structural Coherence During a Charge Transfer Induced Spin Transition in a CoFe
Prussian Blue Analogue by Transmission Electron Microscopy: M. Itoi, T. Jike, D. Nishio-Hamane, S. Udagawa, T.
Tsuda, S. Kuwabata, K. Boukheddaden, M. J. Andrus and D. R. Talham, J. Am. Chem. Soc. 137 (2015) 14686-14693.

10. †*Effect of surfactant/water ratio and reagents’ concentration on size distribution of manganese carbonate nanoparticles
synthesized by microemulsion mediated route: G. Granata, F. Pagnanelli, D. Nishio-Hamane and T. Sasaki, Appl. Surf.
Sci. 331 (2015) 463-471.
11. New hard magnetic phase in Mn–Ga–Al system alloys: T. Saito and D. Nishio-Hamane, J. Alloys Compd. 632 (2015)486.
12. *Substrate-induced anion rearrangement in epitaxial thin films of LaSrCoO4−xHx: G. Bouilly, T. Yajima, T. Terashima,
Y. Kususe, K. Fujita, C. Tassel, T. Yamamoto, K. Tanaka, Y. Kobayashi and H. Kageyama, CrystEngComm 16 (2015)
9669-9674.
13. †*Ferriakasakaite-(La) and ferriandrosite-(La): new epidote-supergroup minerals from Ise, Mie Prefecture, Japan: M.
Nagashima, D. Nishio-Hamane, N. Tomita, T. Minakawa and S. Inaba, Mineral. Mag. 79 (2015) 735.
14. *Imayoshiite, Ca3Al(CO3)[B(OH)4](OH)6•12H2O, a new mineral of ettringite group from Ise City, Mie Prefecture,
Japan: D. Nishio-Hamane, M. Ohnishi, K. Momma, N. Shimobayashi, R. Miyawaki, T. Minakawa and S. Inaba,
Mineral. Mag. 79 (2015) 413-423.
15. †*Pressure-induced superconductivity in the iron-based ladder material BaFe2S3: H. Takahashi, A. Sugimoto, Y. Nambu,
T. Yamauchi, Y. Hirata, T. Kawakami, M. Avdeev, K. Matsubayashi, F. Du, C. Kawashima, H. Soeda, S. Nakano, Y.
Uwatoko, Y. Ueda, T. J. Sato and K. Ohgushi, Nature Mater. 14 (2015) 1008-1012.
16. Synthesis of oxamate and urea by oxidative single and double carbonylation of amines using immobilized palladium
metal-containing ionic liquid@SBA-15: S. T. Gadge, E. N. Kusumawati, K. Harada, T. Sasaki, D. Nishio-Hamane andB. M. Bhanage, J. Mol. Catal. A: Chem. 400 (2015) 170.
17. Synthesis of Polyester Amide by Carbonylation–Polycondensation Reaction Using Immobilized Palladium Metal
Containing Ionic Liquid on SBA-15 as a Phosphine-Free Catalytic System: A. Satapathy, S. T. Gadge, E. N.
Kusumawati, K. Harada, T. Sasaki, D. Nishio-Hamane and B. M. Bhanage, Catal. Lett. 145 (2015) 824.
18. * チタン酸塩化合物の高圧高温相転移 : 浜根 大輔 , SPring-8 利用研究成果集 3 (2015) 6-9.
19. †*Impurity-Induced First-Order Phase Transitions in Highly Crystalline V2O3 Nanocrystals: Y. Ishiwata, E. Takahashi,
K. Akashi, M. Imamura, J. Azuma, K. Takahashi, M. Kamada, H. Ishii, Y.-F. Liao, Y. Tezuka, Y. Inagaki, T. Kawae, D.
Nishio-Hamane, M. Nantoh, K. Ishibashi and T. Kida, Adv. Mater. Interfaces 2 (2015) 1500132(1-6).
20. †*Magnetic properties of Sm5Fe17 melt-spun ribbons and their borides: T. Saito and D. Nishio-Hamane, AIMS Mat. Sci.
2 (2015) 392-400.
21. †*Pressure-induced non-superconducting phase of β-Na0.33V2O5 and the mechanism of high-pressure phase transitionsin β-Na0.33V2O5 and β-Li0.33V2O5 at room temperature: A. Grzechnik, Y. Ueda, T. Yamauchi, M. Hanfland, P. Hering, V.
Potapkin and K. Friese, J. Phys.: Condens. Matter 28 (2016) 035401(1-9).
22. †*Hybrid Amine-Functionalized Graphene Oxide as a Robust Bifunctional Catalyst for Atmospheric Pressure Fixationof Carbon Dioxide using Cyclic Carbonates: V. B. Saptal, T. Sasaki, K. Harada, D. Nishio-Hamane and B. M. Bhanage,
ChemSusChem 9 (2016) 644.
23. †*Light and SEM observation of opal phytoliths in the mulberry leaf: O. Tsutsui, R. Sakamoto, M. Obayashi, S.
Yamakawa, T. Handa, D. Nishio-Hamane and I. Matsuda, Flora 218 (2016) 44-50.
24. * 新鉱物・宮久石の誕生について : 浜根 大輔 , 岩石鉱物科学 44 (2015) 57-59.

† Joint research with outside partners.

ISSP Activity Report 2015173

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), small-angle X-ray scattering (SAXS), and dynamic
light scattering (DLS). The objectives are to elucidate the relationship between the structure and variety of novel properties/functions of polymer gels/resins. The highlights of 2015 include (1) development of high-toughness Ion gel for CO2 separation, (2) gelation and cross-link inhomogeneity of phenolic resins, (3) structure evolution of catalyst ink for fuel cell in drying
process, (4) rubber elasticity for percolation network consisting of Gaussian chains, (5) gelation mechanism of Tetra-Armed
Poly(ethylene glycol) in aprotic ionic liquid, (6) structural analysis of lipophilic polyelectrolyte solutions and gels in low-polar
solvents and so on.
1.

Gelation Mechanism of Tetra-Armed Poly(ethylene glycol) in Aprotic Ionic Liquid Containing Non-volatile Proton
Source, Protic Ionic Liquid: K. Hashimoto, K. Fujii, K. Nishi, T. Sakai, N. Yoshimoto, M. Morita and M. Shibayama, J.
Phys. Chem. B 119 (2015) 4795-4801.

2.

Microscopic Solvation Structure of Glucose in 1-Ethyl-3-methylimidazolium Methylphosphonate Ionic Liquid: K.
Hirosawa, K. Fujii, K. Hashimoto, Y. Umebayashi and M. Shibayama, J. Phys. Chem. B 119 (2015) 6262.

3.

Electrophoretic mobility of semi-flexible double-stranded DNA in defect-controlled polymer networks: Mechanism
investigation and role of structural parameters: K. Khairulina, X. Li, K. Nishi, M. Shibayama, U.-I. Chung and T. Sakai,
J. Chem. Phys. 142 (2015) 234904.

4.

Rubber elasticity for percolation network consisting of Gaussian chains: K. Nishi, H. Noguchi, T. Sakai and M.
Shibayama, J. Chem. Phys. 143 (2015) 184905.

5.

Phase Behavior of Block Copolymers in Selective Supercritical Solvent: M. M. M. Ito, K. Ito, M. Shibayama, K.
Sugiyama and H. Yokoyama, Macromolecules 48 (2015) 3590.

6.

Structural Analysis of Lipophilic Polyelectrolyte Solutions and Gels in Low-Polar Solvents: K. Nishi, S. Tochioka, T.
Hiroi, T. Yamada, K. Kokado, T.-H. Kim, E. P. Gilbert, K. Sada and M. Shibayama, Macromolecules 48 (2015) 3613.

7.

高分子ゲルおよびミセルの中性子散乱に魅せられて : 柴山 充弘 , 波紋 25 (2015) 120-125.

8.

Carbon Dioxide Separation Using a High-toughness Ion Gel with a Tetra-armed Polymer Network: K. Fujii, T. Makino,
K. Hashimoto, T. Sakai, M. Kanakubo and M. Shibayama, Chem. Lett. 44 (2015) 17.

9.

Reliable Hydrogel with Mechanical “Fuse Link” in an Aqueous Environment: S. Kondo, T. Hiroi, Y.-S. Han, T.-H. Kim,
M. Shibayama, U.-I. Chung and T. Sakai, Adv. Mater. 27 (2015) 7407.

10. Dynamic light scattering study on curing mechanisms of novolac-type phenolic resins: Y. Shudo, A. Izumi, T. Takeuchi,
T. Nakao and M. Shibayama, Polym. J. 47 (2015) 79-81.
11. Gelation Kinetics and Polymer Network Dynamics of Homogeneous Tetra-PEG Gels: T. Birshtein, Macromol. Symp.
348 (2015) 9.
12. Supercoiling transformation of chemical gels: M. Asai, T. Katashima, T. Sakai and M. Shibayama, Soft Matter 11(2015) 7101.
13. Multiblock copolymers exhibiting spatio-temporal structure with autonomous viscosity oscillation: M. Onoda, T. Ueki,
M. Shibayama and R. Yoshida, Sci. Rep. 5 (2015) 15792.
14. Structural evolution of a catalyst ink for fuel cells during the drying process investigated by CV-SANS: T. Kusano, T.
Hiroi, K. Amemiya, M. Ando, T. Takahashi and M. Shibayama, Polym J 47 (2015) 546.
15. Self-oscillating AB diblock copolymer developed by post modification strategy: T. Ueki, M. Onoda, R. Tamate, M.
Shibayama and R. Yoshida, Chaos 25 (2015) 064605.
16. Nearly Ideal Polymer Network Ion Gel Prepared in pH-Buffering Ionic Liquid: K. Hashimoto, K. Fujii, K. Nishi, T.
Sakai and M. Shibayama, Macromolecules 49 (2016) 344.
17. Transitions of Aggregation States for Concentrated Carbon Nanotube Dispersion: T. Hiroi, S. Ata and M. Shibayama, J.
Phys. Chem. C 120 (2016) 5776.
18. 小角 X 線散乱法によるフェノール樹脂ベーキング過程のその場解析 : 和泉 篤士 , 若林み どり , 首藤 靖幸 , 中尾 俊夫 , 柴
山 充弘 , ネットワークポリマー 2015 (2015) 83-88.
* Joint research among groups within ISSP.

174

ISSP Activity Report 201519. Small-angle Neutron Scattering of Polysaccharide Hydrogels: M. Shibayama, in: Polysaccharide hydrogels: Characterization and Biomedical Applications, Ch 7, edited by P. Matricardi, F. Alhaique and T. Coviello, (Pan Stanford
Publishing Pte. Ltd., Singapore, 2016), 245-264.

Yoshizawa groupA systematic study on spin dynamics in a two-dimensional transition-metal Ni oxide has been carried out with use of the highresolution chopper spectrometer installed at BL12 in the Material and Life Science Facility, J-PARC. The checkerboard-typespin-charge ordering in the highly hole-doped region of the layered nickelate was studied in detail. The nature of the excitation
spectra and the thermodynamic properties in the checkerboard phase was found to show qualitative differences from those in the
stripe phase. Magnetic properties of a family of Ce-based non-centrosymmetric heavy fermion compounds CeTSi3 (T=transition
metal ions) were also studied.
1.

Neutron Diffraction Study of Parasitic Nd-Moment Order in the Checkerboard-Type Phase Nd1.3Sr0.7NiO4: R.
Kobayashi, H. Yoshizawa, M. Matsuda, R. Kajimoto, K. Ishizaka and Y. Tokura, J. Phys. Soc. Jpn. 84 (2015) 064711.

2.

Resistance Anomalies Accompanying Crossover from Heavy-Fermion Regime to Intermediate-Valence Regime: A
Study of Cu–Ni Substitution and Pressure Effects on CeCu2Si2: Y. Ikeda, Y. Ito, S. Araki, T. C. Kobayashi and H.
Yoshizawa, J. Phys. Soc. Jpn. 84 (2015) 024702.

3.

Single-Crystal Neutron Diffraction Study of the Heavy-Electron Superconductor CeNiGe 3: Y. Ikeda, D. Ueta, H.
Yoshizawa, A. Nakao, K. Munakata and T. Ohhara, J. Phys. Soc. Jpn. 84 (2015) 123701.

4.

Transport and Thermodynamic Studies of Stripe and Checkerboard Ordering in Layered Nickel Oxides R2−xSrxNiO4(R = La and Nd): Y. Ikeda, S. Suzuki, T. Nakabayashi, H. Yoshizawa, T. Yokoo and S. Itoh, J. Phys. Soc. Jpn. 84 (2015)
023706.

5.

†*

6.

*

7.

Characterization of Ferromagnetic Order in CePd2P2: Y. Ikeda, H. Yoshizawa, S. Konishi, S. Araki, T. C. Kobayashi, T.
Yokoo and S. Itoh, J. Phys.: Conf. Ser. 592 (2015) 012013.

8.

*

9.

Inelastic Neutron Scattering Study of Stripe and Overdoped Checkerboard Ordering in Layered Nickel Oxide
Nd2−xSrxNiO4: Y. Ikeda, S. Suzuki, T. Nakabayashi, H. Yoshizawa, T. Yokoo and S. Itoh, J. Phys. Soc. Jpn. 85 (2016)
023701.

Pauli-limited superconductivity and antiferromagnetism in the heavy-fermion compound CeCo(In1−xZnx)5: M.
Yokoyama, H. Mashiko, R. Otaka, Y. Sakon, K. Fujimura, K. Tenya, A. Kondo, K. Kindo, Y. Ikeda, H. Yoshizawa, Y.
Shimizu, Y. Kono and T. Sakakibara, Phys. Rev. B 92 (2015) 184509(9).
Temperature and composition phase diagram in the iron-based ladder compounds Ba1−xCsxFe2Se3: T. Hawai, Y.
Nambu, K. Ohgushi, F. Du, Y. Hirata, M. Avdeev, Y. Uwatoko, Y. Sekine, H. Fukazawa, J. Ma, S. Chi, Y. Ueda, H.
Yoshizawa and T. J. Sato, Phys. Rev. B 91 (2015) 184416.

Science from the Initial Operation of HRC: S. Itoh, T. Yokoo, T. Masuda, H. Yoshizawa, M. Soda, Y. Ikeda, S. Ibuka,
D. Kawana, T. J. Sato, Y. Nambu, K. Kuwahara, S.-I. Yano, J. Akimitsu, Y. Kaneko, Y. Tokura, M. Fujita, M. Hase, K.
Iwasa, H. Hiraka, T. Fukuda, K. Ikeuchi, K. Yoshida, T. Yamaguchi, K. Ono and Y. Endoh, JPS Conf. Proc. 8 (2015)
034001.

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, we have succeeded to observe the inelastic neutron scattering spectra of palladium hydride nanoparticles. The peaks
characteristic to the nanoparticles are attributed to the vibration of the H atoms located at the tetrahedral sites of the Pd lattice,which were predicted by our neutron powder diffraction work. Another topic is on the dynamics of a reverse osmotic membraneconsisting of aromatic polyamide and water. This system is remarked for seawater desalination and waste-water reclamation.
Several quasielastic neutron scattering experiments in a wide time range (0.5 ps to 5 ns) revealed that the polyamide network is
drastically plasticized by water and moving with water even at 240 K. This information will give a new insight into the mechanism of water purification. Other than above topics, we have made some progresses in the studies on vapor-deposited molecularglasses and ionic liquids with plastically crystalline phases.
1.

Glass transition and positional ordering of hydrogen in bulk and nanocrystalline palladium: H. Akiba, H. Kobayashi, H.
Kitagawa, M. Kofu and O. Yamamuro, Phys. Rev. B 92 (2015) 064202.

† Joint research with outside partners.

ISSP Activity Report 2015

175

2.

Thermal and Structural Studies of Imidazolium-Based Ionic Liquids with and without Liquid-Crystalline Phases: The
Origin of Nanostructure: F. Nemoto, M. Kofu and O. Yamamuro, J. Phys. Chem. B 119 (2015) 5028-5034.

3.

Quasielastic neutron scattering studies on glass-forming ionic liquids with imidazolium cations: M. Kofu, M. Tyagi, Y.
Inamura, K. Miyazaki and O. Yamamuro, J. Chem. Phys. 143 (2015) 234502.

4.

Inelastic neutron scattering study on boson peaks of imidazolium-based ionic liquids: M. Kofu, Y. Inamura, Y. Moriya,
A. Podlesnyak, G. Ehlers and O. Yamamuro, Journal of Molecular Liquids 210B (2015) 164-168.

5.

Connecting thermodynamics and dynamics in a supercooled liquid: Cresolphthalein-dimethylether: S. Samanta, O.
Yamamuro and R. Richert, Thermochimica Acta 636 (2016) 57-62.

6.

Effect of water on the structure of a prototype ionic liquid: O. Borodin, D. L. Price, B. Aoun, M. A. González, J.
B. Hooper, M. Kofu, S. Kohara, O. Yamamuro and M.-L. Saboungi, Phys. Chem. Chem. Phys. (2016) 10.1039.
C6CP02191C, in print.

7.

中性子散乱で観たイオン液体の階層的構造とダイナミクス : 山室 修 , 根本 文也 , 古府 麻衣子 , 高圧力の科学と技術 25(2015) 200-207.

8.

低温蒸着法で作製した単純分子ガラスの構造 : 山室 修 , 水野 勇希 , 古府 麻衣子 , 日本結晶学会誌 58 (2016) 13-17.

9.

イミダゾリウム系イオン液体の階層的・ガラスダイナミクス : 古府 麻衣子 , 山室 修 , 日本結晶学会誌 58 (2016) 18-23.

Masuda group
The goal of our research is to discover a new quantum phenomenon and to reveal the mechanism of it. In this fiscal year westudied the following topics; complex magnetostructural order in the frustrated spinel LiInCr4O8, magnetic model in multiferroic NdFe3(BO3)4, specific heats of triangular spin tube in magnetic fields, and magnetic anti-cancer compound for magnetguided delivery and magnetic resonance imaging.
1.

*

2.

Magnetic model in multiferroic NdFe3(BO3)4 investigated by inelastic neutron scattering: S. Hayashida, M. Soda, S.
Itoh, T. Yokoo, K. Ohgushi, D. Kawana, H. M. Rønnow and T. Masuda, Phys. Rev. B 92 (2015) 054402.

3.

マルチフェロイック物質 Ba2CoGe2O7 におけるスピン・ネマティック相互作用の観測 : 益田 隆嗣 , 左右田 稔 , 固体物理 50

Complex magnetostructural order in the frustrated spinel LiInCr4O8: G. J. Nilsen, Y. Okamoto, T. Masuda, J. Rodriguez-Carvajal, H. Mutka, T. Hansen and Z. Hiroi, Phys. Rev. B 91 (2015) 174435(1-8).

(2015) 111.

4.

Inelastic Neutron Scattering on Multiferroics NdFe3(BO3)4: S. Hayashida, M. Soda, S. Itoh, T. Yokoo, K. Ohgushi, D.
Kawana and T. Masuda, Physics Procedia 75 (2015) 127.

5.

Specific Heats of Triangular Spin Tube in Magnetic Fields: H. Manaka, M. Hagihala, S. Hayashida, M. Soda, T. Masuda
and Y. Miura, Physics Procedia 75 (2015) 718.

6.

A magnetic anti-cancer compound for magnet-guided delivery and magnetic resonance imaging: H. Eguchi, M.
Umemura, R. Kurotani, H. Fukumura, I. Sato, J.-H. Kim, Y. Hoshino, J. Lee, N. Amemiya, M. Sato, K. Hirata, D. J.
Singh, T. Masuda, M. Yamamoto, T. Urano, K. Yoshida, K. Tanigaki, M. Yamamoto, M. Sato, S. Inoue, I. Aoki and Y.
Ishikawa, Sci. Rep. 5 (2015) 9194.

7.

*

8.

Crystal Field Excitations in the Breathing Pyrochlore Antiferromagnet Ba3Yb2Zn5O11: T. Haku, M. Soda, M. Sera, K.
Kimura, S. Itoh, T. Yokoo and T. Masuda, J. Phys. Soc. Jpn. 85 (2016) 034721.

9.

Dielectric and Magnetic Properties in Relaxor Magnet LuFeCoO4: M. Soda and T. Masuda, J. Phys. Soc. Jpn. 85 (2016)
034713.

Science from the Initial Operation of HRC: S. Itoh, T. Yokoo, T. Masuda, H. Yoshizawa, M. Soda, Y. Ikeda, S. Ibuka,
D. Kawana, T. J. Sato, Y. Nambu, K. Kuwahara, S.-I. Yano, J. Akimitsu, Y. Kaneko, Y. Tokura, M. Fujita, M. Hase, K.
Iwasa, H. Hiraka, T. Fukuda, K. Ikeuchi, K. Yoshida, T. Yamaguchi, K. Ono and Y. Endoh, JPS Conf. Proc. 8 (2015)
034001.

10. Spin Model of O2-Based Magnet in a Nanoporous Metal Complex: M. Soda, Y. Honma, S. Takamizawa, S. OhiraKawamura, K. Nakajima and T. Masuda, J. Phys. Soc. Jpn. 85 (2016) 034717.
11. Magnetic ordering of the buckled honeycomb lattice antiferromagnet Ba2NiTeO6: S. Asai, M. Soda, K. Kasatani, T.
Ono, M. Avdeev and T. Masuda, Phys. Rev. B 93 (2016) 024412.

* Joint research among groups within ISSP.

176

ISSP Activity Report 2015

International MegaGauss Science Laboratory
Takeyama group
Single-walled carbon nanotubes (SWNT) with a typical tube diameter an order of 1 nm are characterized by the quasi-one
dimensional system. Optical properties are enriched by the enhancement of the excitonic band-edge structure. When a magnetic
flux penetrates through the tube, the electronic band structure is subjected to substantial modulation via the mechanism of
Aharonov-Bohm (A-B) effect. This effect lifts the quantum degeneracy of the band-edge states, induces splittings of the exciton
optical absorption peak in megagauss magnetic field. The magneto-optical A-B splitting was investigated in magnetic fields of
up to 300 – 400 T by observing band-edge exciton absorption spectra. The spectra evolved as a simple bright and dark exciton
splitting with a linear magnetic field dependence as has been predicted by T. Ando. The ratio of the splitting is governed by amicroscopic information of the environment dielectric substances surrounding the SWNTs.
1.

*

2.

Exciton splitting in semiconducting carbon nanotubes in ultrahigh magnetic fields above 300 T: D. Nakamura, T. Sasaki,
W. Zhou, H. Liu, H. Kataura and S. Takeyama, Phys. Rev. B 91 (2015) 235427.

3.

†*

4.

†*

5.

*

6.

†*

Magnetic-Field-Induced Insulator–Metal Transition in (Pr1−yYy)0.7Ca0.3CoO3 at Ultrahigh Magnetic Fields: S. Lee, Y.
H. Matsuda, T. Naito, D. Nakamura and S. Takeyama, J. Phys. Soc. Jpn. 84 (2015) 044703-7.

Phase boundary of θ phase of solid oxygen in ultrahigh magnetic fields: T. Nomura, Y. H. Matsuda, S. Takeyama, A.
Matsuo, K. Kindo and T. C. Kobayashi, Phys. Rev. B 92 (2015) 064109 (4 pages).
One-Way Transparency of Light in Multiferroic CuB2O4: S. Toyoda, N. Abe, S. Kimura, Y. H. Matsuda, T. Nomura, A.
Ikeda, S. Takeyama and T. Arima, Phys. Rev. Lett. 115 (2015) 267207 (5 pages).
Effect of very high magnetic field on the optical properties of firefly light emitter oxyluciferin: W. Zhou, D. Nakamura,
Y. Wang, T. Mochizuki, H. Akiyama and S. Takeyama, J. Lumin. 165 (2015) 15.
Anomalous diamagnetic shifts in InP-GaP lateral quantum-wires: Y. H. Shin, B. K. Choi, Y. Kim, J. D. Song, D.
Nakamura, Y. H. Matsuda and S. Takeyama, Opt. Express 23 (2015) 28349-28357.

Kindo groupLong pulsed magnetic field has been improved. The maximum field of long pulse magnet was limited to 36 T due to the control
system. We have improved the control system and succeeded in generating 42.5 T. The other improvement is development ofalmost perfect flat-top field. We have added a small coil into the bore of the large long pulse magnet and controlled the small
coil to obtain the flat-top magnetic field. We have succeeded in generating 40 ± 0.005 T for 0.2 sec. These improvements will
expand the possibility of the high field study on the condensed matter physics.
1.

*

2.

*

3.

†

4.

*

5.

†

High-magnetic-field phase transitions and H–T phase diagram of the Kagome-staircase compound Ni3V2O8: Z. Q.
Lin, M. Yang, H. W. Wang, Q. Guo, Y. J. Liu, X. T. Han, Y. B. Han, J. F. Wang, Z. Z. He and K. Kindo, J. Magn. Magn.
Mater. 382 (2015) 7.

6.

†
Evolution of exchange interaction constants across magnetic phase transitions in the chromium spinel oxide CdCr2O4:
S. Kimura, Y. Sawada, Y. Narumi, K. Watanabe, M. Hagiwara, K. Kindo and H. Ueda, Phys. Rev. B 92 (2015)
144410(1-9).

7.

†*

Field Evolution of Quantum Critical and Heavy Fermi-Liquid Components in the Magnetization of the Mixed Valence
Compound β -YbAlB4: Y. Matsumoto, K. Kuga, Y. Karaki, Y. Shimura, T. Sakakibara, M. Tokunaga, K. Kindo and S.
Nakatsuji, J. Phys. Soc. Jpn. 84 (2015) 024710(1-7).
Possible Excitonic Phase of Graphite in the Quantum Limit State: K. Akiba, A. Miyake, H. Yaguchi, A. Matsuo, K.
Kindo and M. Tokunaga, J. Phys. Soc. Jpn. 84 (2015) 054709(1-6).
Spin-Liquid Ground State in the Spin 1/2 Distorted Diamond Chain Compound K3Cu3AlO2(SO4)4: M. Fujihala, H.
Koorikawa, S. Mitsuda, M. Hagihala, H. Morodomi, T. Kawae, A. Matsuo and K. Kindo, J. Phys. Soc. Jpn. 84 (2015)
073702(1-4).
X-ray Absorption Spectroscopy in the Heavy Fermion Compound α-YbAlB4 at High Magnetic Fields: T. T. Terashima,
Y. H. Matsuda, K. Kuga, S. Suzuki, Y. Matsumoto, S. Nakatsuji, A. Kondo, K. Kindo, N. Kawamura, M. Mizumaki and
T. Inami, J. Phys. Soc. Jpn. 84 (2015) 114715(1-4).

Pauli-limited superconductivity and antiferromagnetism in the heavy-fermion compound CeCo(In1−xZnx)5: M.
Yokoyama, H. Mashiko, R. Otaka, Y. Sakon, K. Fujimura, K. Tenya, A. Kondo, K. Kindo, Y. Ikeda, H. Yoshizawa, Y.
Shimizu, Y. Kono and T. Sakakibara, Phys. Rev. B 92 (2015) 184509(1-9).

† Joint research with outside partners.

ISSP Activity Report 2015

177

8.

†*

9.

†

Phase boundary of θ phase of solid oxygen in ultrahigh magnetic fields: T. Nomura, Y. H. Matsuda, S. Takeyama, A.
Matsuo, K. Kindo and T. C. Kobayashi, Phys. Rev. B 92 (2015) 064109 (4 pages).
Successive magnetic phase transitions in α-RuCl3: XY-like frustrated magnet on the honeycomb lattice: Y. Kubota, H.
Tanaka, T. Ono, Y. Narumi and K. Kindo, Phys. Rev. B 91 (2015) 094422.

10. †Valence-specific magnetization of the charge-ordered multiferroelectric LuFe2O4 using soft x-ray magnetic circulardichroism under 30 T pulsed high magnetic fields: Y. Narumi, T. Nakamura, K. Saito, T. Morioka, Y. Fukada, T. Kambe,
N. Ikeda, Y. Kotani, T. Kinoshita, K. Kindo and H. Nojiri, Phys. Rev. B 91 (2015) 014410.
11. Generation of flat-top pulsed magnetic fields with feedback control approach: Y. Kohama and K. Kindo, Rev. Sci.
Instrum. 86 (2015) 104701(5).
12. *One-Third Magnetization Plateau with a Preceding Novel Phase in Volborthite: H. Ishikawa, M. Yoshida, K. Nawa, M.
Jeong, S. Kramer, M. Horvatic, C. Berthier, M. Takigawa, M. Akaki, A. Miyake, M. Tokunaga, K. Kindo, J. Yamaura, Y.
Okamoto and Z. Hiroi, Phys. Rev. Lett. 114 (2015) 227202(1-5).
13. * パルス強磁場下における磁気熱量効果／比熱測定手法の開発 : 木原 工 , 小濱 芳允 , 徳永 将史 , 金道 浩一 , 固体物理
50 (2015) 371.
14. †*Anisotropy in the upper critical field of FeSe and FeSe0.33Te0.67 single crystals: J. L. Her, Y. Kohama, Y. H. Matsuda,
K. Kindo, W.-H. Yang, D. A. Chareev, E. S. Mitrofanova, O. S. Volkova, A. N. Vasiliev and J.-Y. Lin, Supercond. Sci.
Technol. 28 (2015) 045013 (6 pages).
15. †Large magnetoresistance of EuPtP1−xAsx: M. Sugishima, H. Wada, A. Mitsuda, A. Kondo and K. Kindo, Phys. Status
Solidi B 252 (2015) 2784-2788.
16. †*Superconductivity protected by spin–valley locking in ion-gated MoS2: Y. Saito, Y. Nakamura, M. S. Bahramy, Y.
Kohama, J. Ye, Y. Kasahara, Y. Nakagawa, M. Onga, M. Tokunaga, T. Nojima, Y. Yanase and Y. Iwasa, Nature Phys. 12(2015) 144-150.
17. †*Development of non-metallic diamond anvil cell and quantum oscillation measurement of CePt2ln7 in a pulsedmagnet: A. Miyake, Y. Kohama, S. Ohta, Y. Hirose, R. Settai, K. Matsubayashi, Y. Uwatoko, A. Matsuo, K. Kindo and
M. Tokunaga, J. Phys.: Conf. Ser. 592 (2015) 012149(1-6).
18. *Synchrotron X-ray spectroscopy study on the valence state and magnetization in α-YbAl1-xFexB4 (x = 0.115) at low
temperatures and high magnetic fields: T. Terashima, Y. H. Matsuda, K. Kuga, S. Suzuki, Y. Matsumoto, S. Nakatsuji, A.
Kondo, K. Kindo, N. Kawamura, M. Mizumaki and T. Inami, J. Phys.: Conf. Ser. 592 (2015) 012020 (6 pages).
19. *Field-induced quantum metal–insulator transition in the pyrochlore iridate Nd2Ir2O7: Z. Tian, Y. Kohama, T. Tomita, H.
Ishizuka, T. H. Hsieh, J. J. Ishikawa, K. Kindo, L. Balents and S. Nakatsuji, Nature Phys. 12 (2015) 134-139.
20. †*Magnetic and Structural Studies on Two-Dimensional Antiferromagnets (MCl)LaNb2O7 (M = Mn, Co, Cr): A.
Kitada, Y. Tsujimoto, M. Nishi, A. Matsuo, K. Kindo, Y. Ueda, Y. Ajiro and H. Kageyama, J. Phys. Soc. Jpn. 85 (2016)
034005(6).
21. †Field-driven successive phase transitions in the quasi-two-dimensional frustrated antiferromagnet Ba2CoTeO6 andhighly degenerate classical ground states: P. Chanlert, N. Kurita, H. Tanaka, D. Goto, A. Matsuo and K. Kindo, Phys.
Rev. B 93 (2016) 094420(7).
22. *Experimental exploration of novel semimetal state in strong anisotropic Pyrochlore iridate Nd2lr2O7 under highmagnetic field: Z. M. Tian, Y. Kohama, T. Tomita, J. Ishikawa, H. Mairo, K. Kindo and S. Nakatsuji, J. Phys.: Conf. Ser.
683 (2016) 012024(6).
23. *Frustrated magnetism in a Mott insulator based on a transition metal chalcogenide: S. Kawamoto, T. Higo, T. Tomita,
S. Suzuki, Z. M. Tian, K. Mochitzuki, A. Matsuo, K. Kindo and S. Nakatsuji, J. Phys.: Conf. Ser. 683 (2016) 012025(4).

Tokunaga group
We are focusing on physics in the quantum limit state, in which all the carriers are accommodated in the lowest Landau level.
Since the carriers are confined in the smallest cyclotron orbit, kinetic degree of freedom normal to the field is suppressed.
Thereby, the ratio between Coulomb interaction and bandwidth becomes large. Such strong correlation in the quantum limit
state can realize anomalous quantum state. We can realize the quantum limit state in some kinds of semimetals with using
non-destructive pulse magnets installed at ISSP. We studied magnetization and transport properties on various types of graphite
in pulsed magnetic fields up to 74 T. The results suggest that the quantum limit state is realized in magnetic fields greater than
53 T applied along the c-axis. From systematic experimental studies, we proposed emergence of excitonic BCS-like state in* Joint research among groups within ISSP.

178

ISSP Activity Report 2015

the quantum limit state of graphite. We also studied transport properties of the semimetallic black phosphorus under pressure.
We found anomalously large positive magnetoresistance and quantum oscillations in this material. The observed small Fermi
surfaces, high mobilities, and light effective masses of carriers in semimetallic black phosphorus are comparable to those in the
representative elemental semimetals of bismuth and graphite.
1.

†*

2.

*

3.

*

4.

High field studies on BiFeO3 single crystals grown by the laser-diode heating floating zone method: M. Tokunaga, M.
Akaki, A. Miyake, T. Ito and H. Kuwahara, J. Magn. Magn. Mater. 383 (2015) 259-261.

5.

Magnetic field induced polar phase in the chiral magnet CsCuCl3: A. Miyake, J. Shibuya, M. Akaki, H. Tanaka and M.
Tokunaga, Phys. Rev. B 92 (2015) 100406(1-5).

6.

*

7.

*

8.

ハイスピードカメラで調べる強磁場物性 : 徳永 将史 , 固体物理 50 (2015) 163.

9.

†*

Anomalous Quantum Transport Properties in Semimetallic Black Phosphorus: K. Akiba, A. Miyake, Y. Akahama, K.
Matsubayashi, Y. Uwatoko, H. Arai, Y. Fuseya and M. Tokunaga, J. Phys. Soc. Jpn. 84 (2015) 073708(1-4).
Field Evolution of Quantum Critical and Heavy Fermi-Liquid Components in the Magnetization of the Mixed Valence
Compound β-YbAlB4: Y. Matsumoto, K. Kuga, Y. Karaki, Y. Shimura, T. Sakakibara, M. Tokunaga, K. Kindo and S.
Nakatsuji, J. Phys. Soc. Jpn. 84 (2015) 024710(1-7).
Possible Excitonic Phase of Graphite in the Quantum Limit State: K. Akiba, A. Miyake, H. Yaguchi, A. Matsuo, K.
Kindo and M. Tokunaga, J. Phys. Soc. Jpn. 84 (2015) 054709(1-6).

One-Third Magnetization Plateau with a Preceding Novel Phase in Volborthite: H. Ishikawa, M. Yoshida, K. Nawa, M.
Jeong, S. Kramer, M. Horvatic, C. Berthier, M. Takigawa, M. Akaki, A. Miyake, M. Tokunaga, K. Kindo, J. Yamaura, Y.
Okamoto and Z. Hiroi, Phys. Rev. Lett. 114 (2015) 227202(1-5).
パルス強磁場下における磁気熱量効果／比熱測定手法の開発 : 木原 工 , 小濱 芳允 , 徳永 将史 , 金道 浩一 , 固体物理

50 (2015) 371.

Superconductivity protected by spin–valley locking in ion-gated MoS2: Y. Saito, Y. Nakamura, M. S. Bahramy, Y.
Kohama, J. Ye, Y. Kasahara, Y. Nakagawa, M. Onga, M. Tokunaga, T. Nojima, Y. Yanase and Y. Iwasa, Nature Phys. 12(2015) 144-150.

10. †*Development of non-metallic diamond anvil cell and quantum oscillation measurement of CePt2ln7 in a pulsedmagnet: A. Miyake, Y. Kohama, S. Ohta, Y. Hirose, R. Settai, K. Matsubayashi, Y. Uwatoko, A. Matsuo, K. Kindo and
M. Tokunaga, J. Phys.: Conf. Ser. 592 (2015) 012149(1-6).
11. Magnetic control of transverse electric polarization in BiFeO3: M. Tokunaga, M. Akaki, T. Ito, S. Miyahara, A. Miyake,
H. Kuwahara and N. Furukawa, Nat. Commun. 6 (2015) 5878(1-5).
12. †Thermodynamics and Kinetics of Martensitic Transformation in Ni-Mn-based Magnetic Shape Memory Alloys: X.
Xu, R. Kainuma, T. Kihara, W. Ito, M. Tokunaga, T. Kanomata, N. Schryvers and J. Van Humbeeck, MATEC Web ofConferences 33 (2015) 01004(1-9).
13. †Spin Structure Change in Co-Substituted BiFeO3: H. Yamamoto, T. Kihara, K. Oka, M. Tokunaga, K. Mibu and M.
Azuma, J. Phys. Soc. Jpn. 85 (2016) 064704(1-4).
14. 圧力下の半金属黒燐における異常量子輸送現象 : 秋葉 和人 , 三宅 厚志 , 徳永 将史 , 赤浜 裕一 , 固体物理 51 (2016)
249.
15. Resistive memory effects in BiFeO3 single crystals controlled by transverse electric fields: S. Kawachi, H. Kuroe, T. Ito,
A. Miyake and M. Tokunaga, Appl. Phys. Lett. 108 (2016) 162903(1-4).
16. †Quantum Hall effect in a bulk antiferromagnet EuMnBi2 with magnetically confined two-dimensional Dirac fermions:
H. Masuda, H. Sakai, M. Tokunaga, Y. Yamasaki, A. Miyake, J. Shiogai, S. Nakamura, S. Awaji, A. Tsukazaki, H.
Nakao, Y. Murakami, T. -h. Arima, Y. Tokura and S. Ishiwata, Science Advances 2 (2016) e1501117(1-6).

Y. Matsuda group
The valence state and magnetization of the heavy fermion compound α-YbAlB4 have been investigated. This compound shows
the strong valence fluctuation and its Yb valence is around 2.8 which is distinctly smaller than the expected valence state 3.0 for
local magnetic Yb ions. Although the fluctuated valence is expected to be influenced by magnetic field due to the suppressionof the Kondo effect, the valence state has been found to be almost independent of magnetic field even at rather high magnetic
field of up to 40 T. This experimental fact contrasts to that obtained in a related antiferomagnetic compound α-YbAl1-xFexB4(x = 0.115); the small valence increase is observed when magnetic field exceeds 20 T. The quantum criticality might be† Joint research with outside partners.

ISSP Activity Report 2015179

enhanced in YbAlB4 at low temperatures and the criticality is not significant in Fe-doped substance, which may explain the
different magnetic field dependence of the Yb valence. In addition to the study of YbAlB4, the B-T phase diagram of solid
oxygen has been clarified and the high-field θ-phase has found to have low entropy and be clearly different from the hightempereture γ-phase. We also studied issulator-metal transtion of Co-oxides, Fe-based superconductors and magneto-optics ofthe multiferroic CuB2O4.
1.

*

2.

*

3.

†*

4.

†*

5.

†*

6.

放射光 X 線実験で磁場を使う : 松田 康弘 , 放射光 28 (2015) 221-228.

7.

†

8.

†*

9.

*

Magnetic-Field-Induced Insulator–Metal Transition in (Pr1−yYy)0.7Ca0.3CoO3 at Ultrahigh Magnetic Fields: S. Lee, Y.
H. Matsuda, T. Naito, D. Nakamura and S. Takeyama, J. Phys. Soc. Jpn. 84 (2015) 044703-7.
X-ray Absorption Spectroscopy in the Heavy Fermion Compound α-YbAlB4 at High Magnetic Fields: T. T. Terashima,
Y. H. Matsuda, K. Kuga, S. Suzuki, Y. Matsumoto, S. Nakatsuji, A. Kondo, K. Kindo, N. Kawamura, M. Mizumaki and
T. Inami, J. Phys. Soc. Jpn. 84 (2015) 114715(1-4).
Phase boundary of θ phase of solid oxygen in ultrahigh magnetic fields: T. Nomura, Y. H. Matsuda, S. Takeyama, A.
Matsuo, K. Kindo and T. C. Kobayashi, Phys. Rev. B 92 (2015) 064109 (4 pages).
One-Way Transparency of Light in Multiferroic CuB2O4: S. Toyoda, N. Abe, S. Kimura, Y. H. Matsuda, T. Nomura,A. Ikeda, S. Takeyama and T. Arima, Phys. Rev. Lett. 115 (2015) 267207 (5 pages).
Anisotropy in the upper critical field of FeSe and FeSe0.33Te0.67 single crystals: J. L. Her, Y. Kohama, Y. H. Matsuda,
K. Kindo, W.-H. Yang, D. A. Chareev, E. S. Mitrofanova, O. S. Volkova, A. N. Vasiliev and J.-Y. Lin, Supercond. Sci.
Technol. 28 (2015) 045013 (6 pages).

超強磁場で誘起される固体酸素の新しい相 : 松田 康弘 , パリティ 30 (2015) 48-51.

Anomalous diamagnetic shifts in InP-GaP lateral quantum-wires: Y. H. Shin, B. K. Choi, Y. Kim, J. D. Song, D.
Nakamura, Y. H. Matsuda and S. Takeyama, Opt. Express 23 (2015) 28349-28357.
Synchrotron X-ray spectroscopy study on the valence state and magnetization in α-YbAl1-xFexB4 (x = 0.115) at low
temperatures and high magnetic fields: T. Terashima, Y. H. Matsuda, K. Kuga, S. Suzuki, Y. Matsumoto, S. Nakatsuji, A.
Kondo, K. Kindo, N. Kawamura, M. Mizumaki and T. Inami, J. Phys.: Conf. Ser. 592 (2015) 012020 (6 pages).

10. †Probe of the Band Structure of MBE Grown p-Type InMnAs at Ultrahigh Magnetic Fields: Y. Sun, F. V. Kyrychenko,
G. D. Sanders, C. J. Stanton, G. A. Khodaparast, J. Kono, Y. H. Matsuda and H. Munekata, SPIN 05 (2015) 1550002 (16pages).

Center of Computational Materials Science
Akai group(1) It is crucial to treat f-states properly to describe the magnetic properties of rear-earth permanent magnet materials. However,the local or semi-local approximations to the density functional method, which is the common basis of first-principles electronic
structure calculations, are unable to treat the f-states in a reasonable way. To overcome this situation we have developed several
methods that go beyond the local density approximation. One of them are the optimized effective potential method combinedwith the exact-excahnge and random-phaseapproximation. Another is the self-interaction corrected LDA/GGA applied to
f-states. Using these methods, the magnetic crystalline anisotropy of Sm2Fe17Nx (0<x<3) is calculated. The results obtainedby two different methods show considerable differences and the origin of these discrepancies are discussed. (2) A scheme thatcombines the non-equilibrium Green's function method with the Korringa-Kohn-Rostoker (KKR) Green's function method is
proposed. The scheme applied to Schottky contact composed of Al/GaN/Al trilayer. The transport property of this system undervarious finite bias voltages is calculated. It is shown that the asymmetric behavior of electron transport against the direction ofbias voltage occurs in this system, confirming the feature of rectification.
1.

Ab initio study of 59Co NMR spectra in Co2FeAl1−xSix Heusler alloys: H. Nishihara, K. Sato, H. Akai, C. Takiguchi, M.
Geshi, T. Kanomata, T. Sakon and T. Wada, Physica B 485 (2015) 66-70.

2.

Near-field correction in the first-principles calculations by the exact two-center expansion for the inverse of the distance:
M. Ogura, C. Zecha, M. Offenberger, H. Ebert and H. Akai, J. Phys.: Condens. Matter 27 (2015) 485201(1-8).

3.

Optimized effective potential method and application to a static RPA correlation: T. Fukazawa and H. Akai, J. Phys.:
Condens. Matter 27 (2015) 115502(1-10).

* Joint research among groups within ISSP.

180

ISSP Activity Report 2015

4.

Formulation of the augmented plane-wave and muffin-tin orbital method: T. Kotani, H. Kino and H. Akai, J. Phys. Soc.
Jpn. 84 (2015) 034701(1-9).

5.

Role of N in the Permanent Magnet Material Sm2Fe17Nx: M. Ogura, A. Mashiyama and H. Akai, J. Phys. Soc. Jpn. 84(2015) 084702(1-6).

6.

The metamagnetic behavior and giant inverse magnetocaloric effect in Ni–Co–Mn– (Ga, In, Sn) Heusler alloys: P. Entel,
V. V. Sokolovskiy, V. D. Buchelnikov, M. Ogura, M. E. Gruner, A. Gruenebohm, D. Comtesse and H. Akai, J. Magn.
Magn. Mater. 385 (2015) 193-197.

7.

Relevance of 4f-3d exchange to finite-temperature magnetism of rare-earth permanent magnets: An ab-initio-based spinmodel approach for NdFe12N: M. Matsumoto, H. Akai, Y. Harashima, S. Doi and T. Miyake, J. Appl. Phys. 119 (2016)
213901(1-7).

Ozaki Taisuke groupFirst-principles calculations based on density functional theories (DFT) have been playing an invaluable role as a cornerstone incomputational materials science. For a wide variety of materials ranging from metals, insulators, semiconductors, and molecules
the DFT calculations enable us to quantitatively predict the chemical and physical properties within a reasonable computational cost. With a recent advance of massively parallel computers, even realistic materials discussed in industrial fields havebeen becoming the potential targets. However, it is a challenging problem to develop algorithms and software being suitable
for massively parallel computers typified by the K-computer, which results in a fact that users and developers are distinguishedfrom each other in recent years, and that most of users use specific software. We have been developing OpenMX (Open source
package for Material eXplore) towards a de fact standard DFT code, and in 2015 released the Ver. 3.8 to the public under
GNU-GPL. To improve numerical accuracy, optimized pseudopotentials and pseudo-atomic basis functions have been developed based on a norm-conserving pseudopotential method with multiple reference energies and a variational optimization
method for radial basis functions. The optimization over 80 elements in the periodic table results in the reliable database storing
optimized pseudopotentials and pseudo-atomic basis functions, where the accuracy of the database was validated by the deltagauge method. In addition, new functionalities including stress tensor calculation, band unfolding method, and eigenchannel/
real space current analysis have been developed, which makes OpenMX a versatile tool for many applications.
1.

First-Principles Study on Cubic Pyrochlore Iridates Y2Ir2O7 and Pr2Ir2O7: F. Ishii, Y. P. Mizuta, T. Kato, T. Ozaki, H.
Weng and S. Onoda, J. Phys. Soc. Jpn. 84 (2015) 073703(5 pages).

2.

Reproducibility in density functional theory calculations of solids: K. Lejaeghere, G. Bihlmayer, T. Bjorkman, P. Blaha,
S. Blugel, V. Blum, D. Caliste, I. E. Castelli, S. J. Clark, A. Dal Corso, S. de Gironcoli, T. Deutsch, J. K. Dewhurst, I.
Di Marco, C. Draxl, M. Du ak, O. Eriksson, J. A. Flores-Livas, K. F. Garrity, L. Genovese, P. Giannozzi, M. Giantomassi, S. Goedecker, X. Gonze, O. Granas, E. K. U. Gross, A. Gulans, F. Gygi, D. R. Hamann, P. J. Hasnip, N. A. W.
Holzwarth, D. Iu an, D. B. Jochym, F. Jollet, D. Jones, G. Kresse, K. Koepernik, E. Kucukbenli, Y. O. Kvashnin, I. L.
M. Locht, S. Lubeck, M. Marsman, N. Marzari, U. Nitzsche, L. Nordstrom, T. Ozaki, L. Paulatto, C. J. Pickard, W.
Poelmans, M. I. J. Probert, K. Refson, M. Richter, G. -M. Rignanese, S. Saha, M. Scheffler, M. Schlipf, K. Schwarz, S.
Sharma, F. Tavazza, P. Thunstrom, A. Tkatchenko, M. Torrent, D. Vanderbilt, M. J. van Setten, V. Van Speybroeck, J. M.
Wills, J. R. Yates, G. -X. Zhang and S. Cottenier, Science 351 (2016) aad3000(1-7).

3.

Hybrid and 4-D FFT implementations of an open-source parallel FFT package OpenFFT: T. V. T. Duy and T. Ozaki, J
Supercomput 72 (2016) 391-416.

Laser and Synchrotron Research Center
Suemoto group(1) We tried to control the orientation of macroscopic magnetization in an orthoferrite ErFeO3 by using terahertz magnetic
field enhanced by a split ring resonator. The magnetization orientation was successfully controlled by changing the time delay
between the terahertz pulse and the heating pulse. In addition, it was found that two kinds of mechanisms, i.e., spin precession
motion and oscillating external magnetic field, are relevant on the symmetry breaking at the beginning of spin reorientation
phase transition induced by the heating pulse. This is probably the first demonstration of coherent control of the macroscopic
magnetization using direct magnetic dipole interaction with radiation. (2) Femtosecond infrared luminescence was observed ina topological insulator (TlBiSe2) and the luminescence component below the band gap energy (0.35 eV) was ascribed to thecarrier recombination in the metal-like two-dimensional Dirac bands at the surface, while that above 0.35eV was assigned tothe transitions in the semiconductor-like bulk bands. These results show that the luminescence method is usable under ambientcondition for investigation of carrier dynamics, while photoemission method requires ultrahigh vacuum, which is different from
† Joint research with outside partners.

ISSP Activity Report 2015181

the operand condition of realistic devices.
1.

Dynamics of photoinduced change of magneto-anisotropy parameter in orthoferrites probed with terahertz excitedcoherent spin precession: K. Yamaguchi, T. Kurihara, H. Watanabe, M. Nakajima and T. Suemoto, Phys. Rev. B 92
(2015) 064404.

2.

Magnetization-free measurements of spin orientations in orthoferrites using terahertz time domain spectroscopy: T.
Suemoto, K. Nakamura, T. Kurihara and H. Watanabe, Appl. Phys. Lett. 107 (2015) 042404.

3.

†

4.

*

5.

†*

6.

*

7.

†

8.

*

9.

*

Ultraviolet stimulated emission from high-temperature-annealed MgO microcrystals at room temperature: H. Soma, Y.
Uenaka, A. Asahara, T. Suemoto and T. Uchino, Appl. Phys. Lett. 106 (2015) 041116(1-5).
Transient gain analysis of gain-switched semiconductor lasers during pulse lasing: S. Chen, T. Ito, A. Asahara, H.
Nakamae, T. Nakamura, M. Yoshita, C. Kim, B. Zhang, H. Yokoyama, T. Suemoto and H. Akiyama, Appl. Opt. 54(2015) 10438.
Layer number dependence of carrier lifetime in graphenes observed using time-resolved mid-infrared luminescence:
H. Watanabe, T. Kawasaki, T. Iimori, F. Komori and T. Suemoto, Chem. Phys. Lett. 637 (2015) 58-62.
Optically detecting the edge-state of a three-dimensional topological insulator under ambient conditions by ultrafast
infrared photoluminescence spectroscopy: S.-Y. Maezawa, H. Watanabe, M. Takeda, K. Kuroda, T. Someya, I. Matsuda
and T. Suemoto, Sci. Rep. 5 (2015) 16443(1-8).
Investigation of insulator-metal transition in Ti4O7 using terahertz probe pulse: H. Kamioka, J. Nishitani, H. Tsukada,
R. Yamaguchi and T. Suemoto, Appl. Phys. Lett. 108 (2016) 071908.
Optical pump-THz probe analysis of long-lived d-electrons and relaxation to self-trapped exciton states in MnO: J.
Nishitani, T. Nagashima, M. Lippmaa and T. Suemoto, Appl. Phys. Lett. 108 (2016) 162101(1-5).

Photoexcited d-electron dynamics in transition metal oxide MnO studied by optical pump-THz probe measurements:
J. Nishitani, T. Kurihara, A. Asahara, T. Nagashima, M. Lippmaa and T. Suemoto, Phys. Status Solidi C 13 (2016)
113-116.

10. †Magnetic-excitation-assisted photoluminescence from self-trapped exciton states in MnO: J. Nishitani, T. Nagashima
and T. Suemoto, J. Phys. Condens. Matter 28 (2016) 016004.
11. †Dynamics of photoinduced phase transitions in a Prussian blue analog studied by CN vibrational spectroscopy (Review
paper): T. Suemoto, R. Fukaya, A. Asahara, H. Watanabe, H. Tokoro and S.-I. Ohkoshi, Current Inorganic Chemistry 6(2016) 10-25.

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.

†*

2.

†

Hybridization gap formation in the Kondo insulator YbB12 observed using time-resolved photoemission spectroscopy:
M. Okawa, Y. Ishida, M. Takahashi, T. Shimada, F. Iga, T. Takabatake, T. Saitoh and S. Shin, Phys. Rev. B 92 (2015)
161108(1-5).

3.

†*

4.

*

5.

†

Low-Temperature and High-Energy-Resolution Laser Photoemission Spectroscopy: T. Shimojima, K. Okazaki and S.
Shin, J. Phys. Soc. Jpn. 84 (2015) 072001(1-26).

Nonequilibrium electronic and phonon dynamics of Cu0.17Bi2Se3 investigated by core-level and valence-bandtime-resolved photoemission spectroscopy: T. Yamamoto, Y. Ishida, R. Yoshida, M. Okawa, K. Okazaki, T. Kanai, A.
Kikkawa, Y. Taguchi, T. Kiss, K. Ishizaka, N. Ishii, J. Itatani, S. Watanabe, Y. Tokura, T. Saitoh and S. Shin, Phys. Rev.
B 92 (2015) 121106(1-6).
Ultrafast spin-switching of a ferrimagnetic alloy at room temperature traced by resonant magneto-optical Kerr effectusing a seeded free electron laser: Sh. Yamamoto, M. Taguchi, T. Someya, Y. Kubota, S. Ito, H. Wadati, M. Fujisawa,
F. Capotondi, E. Pedersoli, M. Manfredda, L. Raimondi, M. Kiskinova, J. Fujii, P. Moras, T. Tsuyama, T. Nakamura, T.
Kato, T. Higashide, S. Iwata, S. Yamamoto, S. Shin and I. Matsuda, Rev. Sci. Instrum. 86 (2015) 083901(1-5).
Ultrahigh-spatial-resolution chemical and magnetic imaging by laser-based photoemission electron microscopy: T.
taniuchi, Y. Kotani and S. Shin, Rev. Sci. Instrum. 86 (2015) 023701(5 pages).

* Joint research among groups within ISSP.

182

ISSP Activity Report 2015

6.

†

7.

†

8.

†*

9.

†

Gigantic Surface Lifetime of an Intrinsic Topological Insulator: M. Neupane, S.-Y. Xu, Y. Ishida, S. Jia, B. M. Fregoso,
C. Liu, I. Belopolski, G. Bian, N. Alidoust, T. Durakiewicz, V. Galitski, S. Shin, R. J. Cava and M. Zahid Hasan, Phys.
Rev. Lett. 115 (2015) 116801(1-5).
Temperature Dependence of Magnetically Active Charge Excitations in Magnetite across the Verwey Transition: M.
Taguchi, A. Chainani, S. Ueda, M. Matsunami, Y. Ishida, R. Eguchi, S. Tsuda, Y. Takata, M. Yabashi, K. Tamasaku, Y.
Nishino, T. Ishikawa, H. Daimon, S. Todo, H. Tanaka, M. Oura, Y. Senba, H. Ohashi and S. Shin, Phys. Rev. Lett. 115(2015) 256405(1-5).
フェムト秒域時間分解光電子分光法によるグラフェンの超高速キャリアダイナミクスの追跡 Tracing Ultrafast Carrier
Dynamics in Graphene with Femtosecond Time-resolved Photoemission Spectroscopy: 染谷 隆史 , 吹留 博一 , 石田 行
章 , 吉田 力矢 , 山本 達 , 板谷 治郎 , 小森 文夫 , 辛 埴 , 松田 巌 , 表面科学 36(8) (2015) 418-423.

Reaction of Sb on In/Si(111) surfaces: Heteroepitaxial InSb(111) formation: M. Hashimoto, A. Nakaguchi, F. -Z. Guo,
M. Ueda, T. Yasue, T. Matsushita, T. Kinoshita, K. Kobayashi, M. Oura, T. Takeuchi, Y. Saito, S. Shin and T. Koshikawa,
Surf. Sci. 641 (2015) 121-127.

10. †* 高次高調波の固体時間分解光電子分光への応用 Application of High Harmonic Generation to Time-Resolved Photoemission Spectroscopy of Solids: 岡崎 浩三 , 辛 埴 , レーザー研究 43 (12) (2015) 838-843.
11. †*Selective Formation of Zigzag Edges in Graphene Cracks: M. Fujihara, R. Inoue, R. Kurita, T. Taniuchi, Y. Motoyui,
S. Shin, F. Komori, Y. Maniwa, H. Shinohara and Y. Miyata, ACS Nano 9 (2015) 9027-9033.
12. †*Point nodes persisting far beyond Tc in Bi2212: T. Kondo, W. Malaeb, Y. Ishida, T. Sasagawa, H. Sakamoto, T.
Takeuchi, T. Tohyama and S. Shin, Nat. Commun. 6 (2015) 7699(8 pages).
13. †*Quadratic Fermi Node in a 3D Strongly Correlated Semimetal: T. Kondo, M. Nakayama, R. Chen, J. J. Ishikawa, E.
-G. Moon, T. Yamamoto, Y. Ota, W. Malaeb, H. Kanai, Y. Nakashima, Y. Ishida, R. Yoshida, H. Yamamoto, M. Matsunami, S. Kimura, N. Inami, K. Ono, H. Kumigashira, S. Nakatsuji, L. Balents and S. Shin, Nat. Commun. 6 (2015)
10042(1-8).
14. †*Emergent photovoltage on SmB6 surface upon bulk-gap evolution revealed by pump-and-probe photoemission
spectroscopy: Y. Ishida, T. Otsu, T. Shimada, M. Okawa, Y. Kobayashi, F. Iga, Y. Takabatake and S. Shin, Sci. Rep. 5(2015) 8160(1-6).
15. †*Ultrafast electron dynamics at the Dirac node of the topological insulator Sb2Te3: S. Zhu, Y. Ishida, K. Kuroda, K.
Sumida, M. Ye, J. Wang, H. Pan, M. Taniguchi, S. Qiao, S. Shin and A. Kimura, Sci. Rep. 5 (2015) 13213(1-6).
16. †Electronic Structure Evolution across the Peierls Metal-Insulator Transition in a Correlated Ferromagnet: P. A. Bhobe,
A. Kumar, M. Taguchi, R. Eguchi, M. Matsunami, Y. Takata, A. K. Nandy, P. Mahadevan, D. D. Sarma, A. Neroni, E.
Sasioglu, M. Lezaic, M. Oura, Y. Senba, H. Ohashi, K. Ishizaka, M. Okawa, S. Shin, K. Tamasaku, Y. Kohmura, M.
Yabashi, T. Ishikawa, K. Hasegawa, M. Isobe, Y. Ueda and A. Chainani, Phys. Rev. X 5 (2015) 041004(1-9).
17. †*One-dimensional metallic surface states of Pt-induced atomic nanowires on Ge(001): K. Yaji, S. Kim, I. Mochizuki,
Y. Takeichi, Y. Ohtsubo, P. L. Fèvre, F. Bertran, A. Taleb-Ibrahimi, S. Shin and F. Komori, J. Phys.: Condens. Matter 28(2016) 284001(1-9).
18. †Coexistence of a pseudo-gap and a superconducting gap for the high-Tc superconductor LSCO using photoemission
spectroscopy: T. Yoshida, W. Malaeb, S. Ideta, D. H. Lu, R. G. Moor, Z. -X. Shen, M. Okawa, T. Kiss, K. Ishizaka, S.
Shin, S. Komiya, Y. Ando, H. Eisaki, S. Uchida and A. Fujimori, Phys. Rev. B 93 (2016) 014513(5 pages).
19. †Revealing the ultrafast light-to-matter energy conversion before heat diffusion in a layered Dirac semimetal: Y. Ishida,
H. Masuda, H. Sakai, S. Ishiwata and S. Shin, Phys. Rev. B 93 (2016) 100302(6 pages).
20. *High-resolution three-dimensional spin- and angle-resolved photoelectron spectrometer using vacuum ultraviolet laser
light: K. Yaji, A. Harasawa, K. Kuroda, S. Toyohisa, M. Nakayama, Y. Ishida, A. Fukushima, S. Watanabe, C. Chen, F.
Komori and S. Shin, Rev. Sci. Instrum. 87 (2016) 053111(1-6).
21. †*Spin Polarization and Texture of the Fermi Arcs in the Weyl Fermion Semimetal TaAs: S.-Y. Xu, I. Belopolski, D.
S. Sanchez, M. Neupane, G. Chang, K. Yaji, Z. Yuan, C. Zhang, K. Kuroda, G. Bian, C. Guo, H. Lu, T.-R. Chang, N.
Alidoust, H. Zheng, C.-C. Lee, S.-M. Huang, C.-H. Hsu, H.-T. Jeng, A. Bansil, T. Neupert, F. Komori, T. Kondo, S.
Shin, H. Lin, S. Jia and M. Zahid Hasan, Phys. Rev. Lett. 116 (2016) 096801(1-7).
22. †* 角度分解光電子分光による精密測定で解き明かす銅酸化物高温超伝導体の擬ギャップと超伝導ギャップの競合関係 : 近
藤 猛 , 竹内 恒博 , 辛 埴 , 固体物理 51 (2016) 203-221.
23. 超高速時間分解光電子分光 : 石田 行章 , 表面科学 37 (2016) 31-36.
† Joint research with outside partners.

ISSP Activity Report 2015183

24. †Electronic structure and relaxation dynamics in a superconducting topological material: M. Neupane, Y. Ishida, R.
Sankar, J.-X. Zhu, D. S. Sanchez, I. Belopolski, S.-Y. Xu, N. Alidoust, M. Mofazzel Hosen, S. Shin, F. Chou, M. Zahid
Hasan and T. Durakiewicz, Sci. Rep. 6 (2016) 22557(7 pages).
25. †Quasi-particles ultrafastly releasing kink bosons to form Fermi arcs in a cuprate superconductor: Y. Ishida, T. Saitoh, T.
Mochiku, T. Nakane, K. Hirata and S. Shin, Sci. Rep. 6 (2016) 18747(8 pages).

Akiyama group
In 2015, we studied radiation damage effects of in multi-junction solar cells via absolute electroluminescence-efficiency
measurements, by developing LED radiance secondary standards. We studied pico- and femto-second short-pulse generation
via gain switching in GaAs double-hetero semiconductor lasers. We studied quantum yields of equarin in jelly-fish bioluminescence. We also made intensive studies on theoretical quantum-chemistry and molecular-dynamics calculations on oxyluciferins.
1.

Time-resolved observation of coherent excitonic nonlinear response with a table-top narrowband THz pulse wave: K.
Uchida, H. Hirori, T. Aoki, C. Wolpert, T. Tamaya, K. Tanaka, T. Mochizuki, C. Kim, M. Yoshita, H. Akiyama, L. N.
Pfeiffer and K. W. West, Appl. Phys. Lett. 107 (2015) 221106.

2.

Time-resolved photoluminescence measurements for determining voltage-dependent charge-separation efficiencies ofsubcells in triple-junction solar cells: D. M. Tex, T. Ihara, H. Akiyama, M. Imaizumi and Y. Kanemitsu, Appl. Phys. Lett.
106 (2015) 013905.

3.

多接合太陽電池の診断・設計と発光絶対値・発光量子効率の評価 : 秋山 英文 , 応用物理 84 (2015) 319-325.

4.

*

5.

*

6.

Multi-junction-solar-cell designs and characterizations based on detailed-balance principle and luminescence yields: H.
Akiyama, L. Zhu, M. Yoshita, C. Kim, S. Chen, T. Mochizuki and Y. Kanemitsu, Proc. SPIE 9358 (2015) 93580B1-8.

7.

Time-resolved observation of excitonic dynamics under coherent terahertz excitation in GaAs quantum wells: K.
Uchida, H. Hirori, T. Aoki, C. Wolpert, K. Tanaka, T. Mochizuki, C. Kim, M. Yoshita, H. Akiyama, L. N. Pfeiffer and K.
W. West, Proc. SPIE 9361 (2015) 93611L1-6.

8.

Analysis of Oxyluciferin Photoluminescence Pathways in Aqueous Solutions: M. Hiyama, T. Mochizuki, H. Akiyama
and N. Koga, Photochem. Photobiol. 91 (2015) 74.

9.

*Transient gain analysis of gain-switched semiconductor lasers during pulse lasing: S. Chen, T. Ito, A. Asahara, H.
Nakamae, T. Nakamura, M. Yoshita, C. Kim, B. Zhang, H. Yokoyama, T. Suemoto and H. Akiyama, Appl. Opt. 54(2015) 10438.
Effect of very high magnetic field on the optical properties of firefly light emitter oxyluciferin: W. Zhou, D. Nakamura,
Y. Wang, T. Mochizuki, H. Akiyama and S. Takeyama, J. Lumin. 165 (2015) 15.

Vibronic Structures in Absorption and Fluorescence Spectra of Firefly Oxyluciferin in Aqueous Solutions: M. Hiyama,
Y. Noguchi, H. Akiyama, K. Yamada and N. Koga, Photochem. Photobiol. 91 (2015) 819.

10. Degradation mechanism of perovskite CH3NH3PbI3 diode devices studied by electroluminescence and photoluminescence imaging spectroscopy: M. Okano, M. Endo, A. Wakamiya, M. Yoshita, H. Akiyama and Y. Kanemitsu, Appl.
Phys. Express 8 (2015) 102302.
11. On the importance of cavity-length and heat dissipation in GaN-based vertical-cavity surface-emitting lasers: W. J. Liu,
X. L. Hu, L. Y. Ying, S. Q. Chen, J. Y. Zhang, H. Akiyama, Z. P. Cai and B. P. Zhang, Sci. Rep. 5 (2015) 9600.
12. Thorough subcells diagnosis in a multi-junction solar cell via absolute electroluminescence-efficiency measurements: S.
Chen, L. Zhu, M. Yoshita, T. Mochizuki, C. Kim, H. Akiyama, M. Imaizumi and Y. Kanemitsu, Sci. Rep. 5 (2015) 7836.
13. *First-Principles Investigation of Strong Excitonic Effects in Oxygen 1s X-ray Absorption Spectra: Y. Noguchi, M.
Hiyama, H. Akiyama, Y. Harada and N. Koga, J. Chem. Theory Comput. 11 (2015) 1668-1673.
14. Strong localization effect and carrier relaxation dynamics in self-assembled InGaN quantum dots emitting in the green:
G.-E. Weng, W.-R. Zhao, S.-Q. Chen, H. Akiyama, Z.-C. Li, J.-P. Liu and B.-P. Zhang, Nanoscale Res. Lett. 10 (2015)31.
15. Absolute Electroluminescence Imaging of Multi-Junction Solar Cells and Calibration Standards: M. Yoshita, L. Zhu, C.
Kim, H. Akiyama, S. Chen, T. Mochizuki, H. Kubota, T. Nakamura, M. Imaizumi and Y. Kanemitsu, The 42nd IEEE
Photovoltaic Specialists Conference Proceedings 7356199 (2015) 1-4.

* Joint research among groups within ISSP.

184

ISSP Activity Report 2015

16. Characterizations of radiation damages in multi-junction solar cells focused on subcell internal luminescence quantum
yields via absolute electroluminescence measurements: L. Zhu, M. Yoshita, S. Chen, T. Nakamura, T. Mochizuki, C.
Kim, M. Imaizumi, Y. Kanemitsu and H. Akiyama, The 42nd IEEE Photovoltaic Specialists Conference Proceedings
7355671 (2015) 1-4.
17. Determining Subcell Carrier-Collection Efficiencies of Triple-Junction Solar Cells Using Time-Resolved Photoluminescence: D. M. Tex, T. Ihara, H. Akiyama, M. Imaizumi and Y. Kanemitsu, The 42nd IEEE Photovoltaic Specialists
Conference Proceedings 7356197 (2015) 1-4.
18. Solar-cell radiance standard for absolute electroluminescence measurements and open-circuit voltage mapping ofsilicon solar modules: T. Mochizuki, C. Kim, M. Yoshita, J. Mitchell, Z. Lin, S. Chen, H. Takato, Y. Kanemitsu and H.
Akiyama, J. Appl. Phys. 119 (2016) 034501.
19. Conversion efficiency limits and bandgap designs for multi-junction solar cells with internal radiative efficiencies below
unity: L. Zhu, T. Mochizuki, M. Yoshita, S. Chen, C. Kim, H. Akiyama and Y. Kanemitsu, Opt. Express 24 (2016)
A740-A751.
20. *High-precision group-delay dispersion measurements of optical fibers via fingerprint-spectral wavelength-to-time
mapping: T. Ito, O. Slezak, M. Yoshita, H. Akiyama and Y. Kobayashi, Photon. Res. 4 (2016) 13-16.
21. Calibration standards and measurement accuracy of absolute electroluminescence and internal properties in multijunction and arrayed solar cells: M. Yoshita, L. Zhu, C. Kim, T. Mochizuki, T. Nakamura, M. Imaizumi, S. Chen, H.
Kubota, Y. Kanemitsu and H. Akiyama, in Proc. of SPIE Photonics West 9743 (2016) 97430D1-6.
22. Characterization and modeling of radiation damages via internal radiative efficiency in multi-junction solar cells: L.
Zhu, M. Yoshita, T. Nakamura, M. Imaizumi, C. Kim, T. Mochizuki, S. Chen, Y. Kanemitsu and H. Akiyama, in Proc. of
SPIE Photonics West 9743 (2016) 97430U1-7.
23. Characterizations of Radiation Damage in Multijunction Solar Cells Focused on Subcell Internal Luminescence
Quantum Yields via Absolute Electroluminescence Measurements: L. Zhu, M. Yoshita, S. Chen, T. Nakamura, T.
Mochizuki, C. Kim, M. Imaizumi, Y. Kanemitsu and H. Akiyama, IEEE J. Photovoltaics 6 (2016) 777-782.

I. Matsuda group
Developments and experiments of the advanced spectroscopies have been carried out by using vacuum ultraviolet (VUV) andsoft X-rays (SX). At SPring-8 BL07LSU, we have succeeded in realizing fast-switching (10 Hz) of the light polarizations for thesegmented cross-type undulator. Moreover, we could measure a spectrum of X-ray magnetic circular dichroism for a magnetic
sample using the fast-switching of left and right circular polarized light. At the end-station, we routinely supported picosecondtime-resolved SX photoemission spectroscopy experiments of joint-researches. Studies of photovoltaics and photocatalysis havebeen carried out mainly. In the laboratory, we studied electronic structure of novel two-dimensional materials that could show
intriguing dynamical properties.
1.

Deeper insight into phase relations in ultrathin Pb films: R.-Y. Liu, A. Huang, C.-C. Huang, C.-Y. Lee, C.-H. Lin, C.-M.
Cheng, K.-D. Tsuei, H.-T. Jeng, I. Matsuda and S. -J. Tang, Phys. Rev. B 92 (2015) 115415(1-8).

2.

*

Scanning tunneling spectroscopy study of quasiparticle interference on dual topological insulator Bi 1-xSbx: S.
Yoshizawa, F. Nakamura, A. A. Taskin, T. Iimori, K. Nakatsuji, I. Matsuda, Y. Ando and F. Komori, Phys. Rev. B 91
(2015) 045423(1-6).

3.

*

4.

Photoemission Circular Dichroism and Spin Polarization of the Topological Surface States in Ultrathin Bi2Te3 Films: C.
-Z. Xu, Y. Liu, R. Yukawa, L. -X. Zhang, I. Matsuda, T. Miller and T. -C. Chiang, Phys. Rev. Lett. 115 (2015) 016801(1-5).

5.

†*

6.

Significantly enhanced giant Rashba splitting in a thin film of binary alloy: W.-C. Chen, T.-R. Chang, S.-T. Tai, S.
Yamamoto, J.-M. Kuo, C.-M. Cheng, K.-D. Tsuei, K. Yaji, H. Lin, H.-T. Jeng, C.-Y. Mou, I. Matsuda and S.-J. Tang,
New J. Phys. 17 (2015) 083015(1-12).

Ultrafast spin-switching of a ferrimagnetic alloy at room temperature traced by resonant magneto-optical Kerr effectusing a seeded free electron laser: Sh. Yamamoto, M. Taguchi, T. Someya, Y. Kubota, S. Ito, H. Wadati, M. Fujisawa,
F. Capotondi, E. Pedersoli, M. Manfredda, L. Raimondi, M. Kiskinova, J. Fujii, P. Moras, T. Tsuyama, T. Nakamura, T.
Kato, T. Higashide, S. Iwata, S. Yamamoto, S. Shin and I. Matsuda, Rev. Sci. Instrum. 86 (2015) 083901(1-5).

フェムト秒域時間分解光電子分光法によるグラフェンの超高速キャリアダイナミクスの追跡 Tracing Ultrafast Carrier
Dynamics in Graphene with Femtosecond Time-resolved Photoemission Spectroscopy: 染谷 隆史 , 吹留 博一 , 石田 行
章 , 吉田 力矢 , 山本 達 , 板谷 治郎 , 小森 文夫 , 辛 埴 , 松田 巌 , 表面科学 36(8) (2015) 418-423.

† Joint research with outside partners.

ISSP Activity Report 2015

185

7.

†

8.

*

9.

Microscopic observation and chemical mapping of opal phytoliths in a mulberry leaf: O. Tsutsui, R. Sakamoto, M.
Hattori, K. Hasegawa, T. Handa, D. Nishio-Hamane and I. Matsuda, Flora 218 (2015) 44-50.

グラフェンの超高速状態を直接観測 : 染谷 隆史 , 吹留 博一 , 松田 巌 , 光アライアンス 26 (2015) 31.

Optically detecting the edge-state of a three-dimensional topological insulator under ambient conditions by ultrafast
infrared photoluminescence spectroscopy: S.-Y. Maezawa, H. Watanabe, M. Takeda, K. Kuroda, T. Someya, I. Matsuda
and T. Suemoto, Sci. Rep. 5 (2015) 16443 (1-8).

10. Anisotropic effective mass approach for multiple subband structures at wide-gap semiconductor surfaces: Applicationto accumulation layers of SrTiO3 and ZnO: R. Yukawa, K. Ozawa, S. Yamamoto, R. -Y. Liu and I. Matsuda, Surface
Science 641 (2015) 224-230.
11. Generation of metallic eg-derived band at Cs/SrTiO3 interface observed by polarization-dependent photoemission
spectroscopy: K. Akikubo, I. Matsuda, D. Schmaus, G. Marcaud, S. Yamamoto, R.-Y. Liu, R. Yukawa, M. G. Silly, F.
Sirotti and M. D’Angelo, Thin Solid Films 603 (2016) 149-153.
12. 時間分解軟 X 線光電子分光法：半導体表面における光励起キャリアの実時間観測 : 山本 達 , 松田 巌 , 表面科学 37 (2016)
9-13.
13. Capturing transient charged states at the C60/TiO2(110) interface by time-resolved soft X-ray photoelectron spectroscopy: K. Ozawa, S. Yamamoto, R. Yukawa, K. Akikubo, M. Emori, H. Sakama and I. Matsuda, Organic Electronics 31(2016) 98-103.
14. *Real-time observation of reaction processes of CO2 on Cu(997) by ambient-pressure X-ray photoelectron spectroscopy:
T. Koitaya, S. Yamamoto, Y. Shiozawa, K. Takeuchi, R.-Y. Liu, K. Mukai, S. Yoshimoto, K. Akikubo, I. Matsuda and J.
Yoshinobu, Topic in Catalysis 59 (2016) 526-531.

Kobayashi group
We have demonstrated the highest repetition rate in a Kerr-lens mode-locked oscillator in the world. 15-GHz mode space of the
optical frequency comb can be resolved by using commercially available spectrum analyzer. We started to develop a new HHG
beam line for industrial applications. We have demonstrated 300-mW, 193-nm light source with single longitudinal mode at 6
kHz repetition rate for next generation lithography technology.
1.

†

2.

Direct 15-GHz mode-spacing optical frequency comb with a Kerr-lens mode-locked Yb:Y2O3 ceramic laser: M. Endo, I.
Ito and Y. Kobayashi, Opt. Express 23 (2015) 1276-1282.

3.

†

4.

Offset-free broadband Yb:fiber optical frequency comb for optical clocks: T. Nakamura, I. Ito and Y. Kobayashi, Opt.
Express 23 (2015) 19376-19381.

5.

†Single frequency, 5 ns, 200 μJ, 1553 nm fiber laser using silica based Er-doped fiber: Z. Zhao, H. Xuan, H. Igarashi, S.
Ito, K. Kakizaki and Y. Kobayashi, Opt. Express 23 (2015) 29764-29771.

6.

†*

7.

†

8.

Ytterbium fiber-based, 270 fs, 100 W chirped pulse amplification laser system with 1 MHz repetition rate: Z. Zhao and
Y. Kobayashi, Appl. Phys. Express 9 (2016) 012701(1-4).

9.

*300-mW narrow-linewidth deep-ultraviolet light generation at 193 nm by frequency mixing between Yb-hybrid and
Er-fiber lasers: H. Xuan, Z. Zhao, H. Igarashi, S. Ito, K. Kakizaki and Y. Kobayashi, Opt. Express 23 (2015) 1056410572.

High average power coherent vuv generation at 10 MHz repetition frequency by intracavity high harmonic generation:
A. Ozawa, Z. Zhao, M. Kuwata-Gonokami and Y. Kobayashi, Opt. Express 23 (2015) 15107-15118.

Emergent photovoltage on SmB6 surface upon bulk-gap evolution revealed by pump-and-probe photoemission
spectroscopy: Y. Ishida, T. Otsu, T. Shimada, M. Okawa, Y. Kobayashi, F. Iga, Y. Takabatake and S. Shin, Sci. Rep. 5(2015) 8160(1-6).
Femtosecond optical parametric oscillator frequency combs: Y. Kobayashi, K. Torizuka, A. Marandi, R. L. Byer, R. A.
McCracken, Z. Zhang and D. T. Reid, J. Opt. 17 (2015) 094010(1-14).

High-precision group-delay dispersion measurements of optical fibers via fingerprint-spectral wavelength-to-time
mapping: T. Ito, O. Slezak, M. Yoshita, H. Akiyama and Y. Kobayashi, Photon. Res. 4 (2016) 13-16.

10. ５．レーザー（2014 年日本光学会の研究動向）: 赤羽 浩一 , 小林 洋平 , 光学 44 (2015) 141-144.
11. ファイバレーザー光周波数コム技術と光科学への展開 : 小林 洋平 , 月刊オプトロニクス 34 (2015) 144-147.
* Joint research among groups within ISSP.

186

ISSP Activity Report 2015

Itatani group
We carried out several application experiments using the optical parametric chirped pulse amplification (OPCPA) system thatcan produce carrier-envelope phase (CEP)-stable, 1.5-mJ, 10-fs infrared pulses at a repetition rate of 1 kHz. First, we produced
soft-X-ray continuum extending to the photon energy of 320 eV, and measured the static absorption spectrum of a thin film
containing carbon atoms. We successfully resolved the peaks arising from the C=C and C-C bonding with an accumulation time of approximately 100 seconds. This result shows the capability of laser-based time-resolved soft-X-ray absorption
spectroscopy. Second, we measured the photoelectron spectra of ionizing atoms, and observed the CEP-dependent high-energy
structures. By mapping the CEP-dependent cutoffs of photoelectron spectra, we successfully reproduced the differential crosssections of rare gas atoms with a high degree of agreement with the most advanced scattering theory. Third, under the collaboration with Prof. Tanaka at Kyoto University, we produced broadband THz pulses using organic crystals. New directions of the
BIBO-based ultrabroadband optical parametric amplifiers are pursuit as well. First, we developed a high-repetition-rate opticalparametric amplifier using newly developed dispersion compensation mirrors. We have successfully produced CEP-stable 10
uJ, 9-fs infrared pulses at 20 kHz, which were applied to high-throughput electron scattering experiments. Second, we modified
a high-energy OPCPA system to amplify two spectral components in infrared followed by differential frequency generation, resulting in the generation of intense mid-infrared pulses. A strong optical field up to 50 MV/cm was achieved with acapability of sub-cycle EO sampling using 6.5-fs visible pulses. We also kept collaboration with Shin, Komori, and Matsuda
groups at LASOR-ISSP on time-resolved ARPES using a femtosecond EUV source. Photo-induced electronic dynamics of
CuM0.17Bi2Se3 and graphene are successfully measured.
1.

†*

2.

Ultrabroadband infrared chirped mirrors characterized by a white-light Michelson interferometer: K. Kaneshima, M.
Sugiura, K. Tamura, N. Ishii and J. Itatani, Appl. Phys. B 119 (2015) 347-353.

3.

†*

4.

†

5.

Generation of carrier-envelope phase-stable mid-infrared pulses via dual-wavelength optical parametric amplification:
K. Kaneshima, N. Ishii, K. Takeuchi and J. Itatani, Opt. Express 24 (2016) 8660(1-6).

Nonequilibrium electronic and phonon dynamics of Cu0.17Bi2Se3 investigated by core-level and valence-bandtime-resolved photoemission spectroscopy: T. Yamamoto, Y. Ishida, R. Yoshida, M. Okawa, K. Okazaki, T. Kanai, A.
Kikkawa, Y. Taguchi, T. Kiss, K. Ishizaka, N. Ishii, J. Itatani, S. Watanabe, Y. Tokura, T. Saitoh and S. Shin, Phys. Rev.
B 92 (2015) 121106(1-6).

フェムト秒域時間分解光電子分光法によるグラフェンの超高速キャリアダイナミクスの追跡 Tracing Ultrafast Carrier
Dynamics in Graphene with Femtosecond Time-resolved Photoemission Spectroscopy: 染谷 隆史 , 吹留 博一 , 石田 行
章 , 吉田 力矢 , 山本 達 , 板谷 治郎 , 小森 文夫 , 辛 埴 , 松田 巌 , 表面科学 36(8) (2015) 418-423.

Generation of ultrashort intense optical pulses at 1.6 μm from a bismuth triborate-based optical parametric chirped
pulse amplifier with carrier-envelope phase stabilization: N. Ishii, K. Kaneshima, T. Kanai, S. Watanabe and J. Itatani, J.
Optics 17 (2015) 094001(1-8).

Harada group
After three years development of differential pumping system we have for the first time succeeded in the near ambient pressure
soft X-ray RIXS experiments at SPring-8 BL07LSU. The best demonstration was done for O 1s RIXS of SiO2 under around
360 Torr (0.5 bar) air pressure. We also have implemented rotation of the RIXS spectrometer to enable momentum dependent
RIXS experiments urgently requested for the study of strongly correlated systems. This year we have accepted 8 collaborative
works at BL07LSU HORNET endstation, which include oxygen site analysis of high Tc cuprates, operando analysis of Li ion
battery electrodes, RIXS study of multiferroic materials applying magnetic field, spin transition of LaCoO3, monitoring vibrational excitations at Ti site in ferroelectric BaTiO3, and electronic structure analysis of high concentration electrolyte for Li ion
batteries.
1.

†

2.

†

Electron-Phonon Coupling in the Bulk of Anatase TiO2 Measured by Resonant Inelastic X-Ray Spectroscopy: S.
Moser, S. Fatale, P. Krüger, H. Berger, P. Bugnon, A. Magrez, H. Niwa, J. Miyawaki, Y. Harada and M. Grioni, Phys.
Rev. Lett. 115 (2015) 096404 (1-5).

3.

X-ray Emission Spectroscopy of Bulk Liquid Water in "No-man's Land": J. Sellberg, T. McQueen, H. Laksmono, S.
Schreck, M. Beye, D. DePonte, B. O'Kennedy, D. Nordlund, R. Sierra, D. Schlesinger, T. Tokushima, S. Eckert, V.
Segtnan, H. Ogasawara, K. Kubicek, S. Techert, U. Bergmann, G. Dakovski, W. Schlotter, Y. Harada, I. Zhovtobriukh,
M. Bogan, P. Wernet, A. Föhlisch, L. Pettersson and A. Nilsson, J. Chem. Phys. 142 (2015) 044505(1-9).

4.

†Multi-Phonon Excitations in Fe 2p RIXS on Mg2FeH6: K. Kurita, D. Sekiba, I. Harayama, K. Chito, Y. Harada, H.
Kiuchi, M. Oshima, S. Takagi, M. Matsuo, R. Sato, K. Aoki and S.-I. Orimo, J. Phys. Soc. Jpn. 84 (2015) 043201(1-3).

Enhancement in Kinetics of the Oxygen Reduction Reaction on a Nitrogen-Doped Carbon Catalyst by Introduction ofIron via Electrochemical Methods: J. Wu, D. Zhang, H. Niwa, Y. Harada, M. Oshima, H. Ofuchi, Y. Nabae, T. Okajima
and T. Ohsaka, Langmuir 31 (2015) 5529-5536.
† Joint research with outside partners.

ISSP Activity Report 2015

187

5.

Active site formation mechanism of carbon-based oxygen reduction catalysts derived from a hyperbranched iron phthalocyanine polymer: Y. Hiraike, M. Saito, H. Niwa, M. Kobayashi, Y. Harada, M. Oshima, J. Kim, Y. Nabae and M.-A.
Kakimoto, Nanoscale Res Lett 10 (2015) 179(1-11).

6.

†

Operando soft x-ray emission spectroscopy of LiMn2O4 thin film involving Li-ion extraction/insertion reaction: D.
Asakura, E. Hosono, H. Niwa, H. Kiuchi, J. Miyawaki, Y. Nanba, M. Okubo, H. Matsuda, H. S. Zhou, M. Oshima and Y.
Harada, Electrochem. Commun. 50 (2015) 93-96.

7.

*

8.

†

9.

In Situ Hard X-ray Photoelectron Study of O2 and H2O Adsorption on Pt Nanoparticles: Y. Cui, Y. Harada, E. Ikenaga,
R. Li, N. Nakamura, T. Hatanaka, M. Ando, T. Yoshida, G.-L. Li and M. Oshima, J. Phys. Chem. C 120 (2016) 1093610940.

First-Principles Investigation of Strong Excitonic Effects in Oxygen 1s X-ray Absorption Spectra: Y. Noguchi, M.
Hiyama, H. Akiyama, Y. Harada and N. Koga, J. Chem. Theory Comput. 11 (2015) 1668-1673.
Redox Potential Paradox in NaxMO2 for Sodium-Ion Battery Cathodes: Y. Nanba, T. Iwao, B. M. D. Boisse, W. Zhao,
E. Hosono, D. Asakura, H. Niwa, H. Kiuchi, J. Miyawaki, Y. Harada, M. Okubo and A. Yamada, Chem. Mater. 28(2016) 1058-1065.

10. †Characterization of nitrogen species incorporated into graphite using low energy nitrogen ion sputtering: H. Kiuchi, T.
Kondo, M. Sakurai, D. Guo, J. Nakamura, H. Niwa, J. Miyawaki, M. Kawai, M. Oshima and Y. Harada, Phys. Chem.
Chem. Phys. 18 (2016) 458-465.
11. Pt-free carbon-based fuel cell catalyst prepared from spherical polyimide for enhanced oxygen diffusion: Y. Nabae, S.
Nagata, T. Hayakawa, H. Niwa, Y. Harada, M. Oshima, A. Isoda, A. Matsunaga, K. Tanaka and T. Aoki, Sci. Rep. 6(2016) 23276(1-7).
12. †Lewis Basicity of Nitrogen-Doped Graphite Observed by CO2 Chemisorption: H. Kiuchi, R. Shibuya, T. Kondo, J.
Nakamura, H. Niwa, J. Miyawaki, M. Kawai, M. Oshima and Y. Harada, Nanoscale Res Lett 11 (2016) 127(1-7).
13. †Intermediate honeycomb ordering to trigger oxygen redox chemistry in layered battery electrode: B. M. D. Boisse, G.
Liu, J. Ma, S.-I. Nishimura, S.-C. Chung, H. Kiuchi, Y. Harada, J. Kikkawa, Y. Kobayashi, M. Okubo and A. Yamada,Nat. Commun. 7 (2016) 11397(1-9).

Wadati group
We succeeded in the observation of a devil’s staircase in the novel spin-valve system SrCo6O11 by resonant soft x-ray scattering.
We also performed time-resolved reflectivity study of ferrimagnetic alloy GdFeCo thin films by using seeded free electron laser
in FERMI (Italy), and observed ultrafast spin-switching of Fe spins by resonant magneto-optical Kerr effect.
1.

Investigating Orbital Magnetic Moments in Spinel-Type MnV2O4 Using X-ray Magnetic Circular Dichroism: J.
Okabayashi, S. Miyasaka, K. Hemmi, K. Tanaka, S. Tajima, H. Wadati, A. Tanaka, Y. Takagi and T. Yokoyama, J. Phys.
Soc. Jpn. 84 (2015) 104703(1-5).

2.

X-ray spectroscopic study of BaFeO3 thin films; an Fe4+ ferromagnetic insulator: T. Tsuyama, T. Matsuda, S. Chakraverty, J. Okamoto, E. Ikenaga, A. Tanaka, T. Mizokawa, H. Y. Hwang, Y. Tokura and H. Wadati, Phys. Rev. B 91 (2015)
115101(1-7).

3.

*

4.

Engineering a spin-orbital magnetic insulator by tailoring superlattices: J. Matsuno, K. Ihara, S. Yamamura, H. Wadati,
K. Ishii, V. V. Shankar, H.-Y. Kee and H. Takagi, Phys. Rev. Lett. 114 (2015) 247209(1-5).

5.

Observation of a Devil’s Staircase in the Novel Spin-Valve System SrCo6O11: T. Matsuda, S. Partzsch, T. Tsuyama, E.
Schierle, E. Weschke, J. Geck, T. Saito, S. Ishiwata, Y. Tokura and H. Wadati, Phys. Rev. Lett. 114 (2015) 236403(1-5).

6.

Electronic structure of Li1+x[Mn0.5Ni0.5]1-xO2 studied by photoemission and x-ray absorption spectroscopy: Y.
Yokoyama, D. Ootsuki, T. Sugimoto, H. Wadati, J. Okabayashi, X. Yang, F. Du, G. Chen and T. Mizokawa, Appl. Phys.
Lett. 107 (2015) 033903(1-4).

7.

Topotactic synthesis of strontium cobalt oxyhydride thin film with perovskite structure: T. Katayama, A. Chikamatsu, H.
Kamisaka, Y. Yokoyama, Y. Hirata, H. Wadati, T. Fukumura and T. Hasegawa, AIP Advances 5 (2015) 107147(1-7).

Ultrafast spin-switching of a ferrimagnetic alloy at room temperature traced by resonant magneto-optical Kerr effectusing a seeded free electron laser: Sh. Yamamoto, M. Taguchi, T. Someya, Y. Kubota, S. Ito, H. Wadati, M. Fujisawa,
F. Capotondi, E. Pedersoli, M. Manfredda, L. Raimondi, M. Kiskinova, J. Fujii, P. Moras, T. Tsuyama, T. Nakamura, T.
Kato, T. Higashide, S. Iwata, S. Yamamoto, S. Shin and I. Matsuda, Rev. Sci. Instrum. 86 (2015) 083901(1-5).

* Joint research among groups within ISSP.

188

ISSP Activity Report 2015

8.

新型スピントロニクスと悪魔の階段 : 和達 大樹 , パリティ 31 (2016) 48-51.

9.

Material/element-dependent fluorescence-yield modes on soft X-ray absorption spectroscopy of cathode materials for
Li-ion batteries: D. Asakura, E. Hosono, Y. Nanba, H. Zhou, J. Okabayashi, C. Ban, P. -A. Glans, J. Guo, T. Mizokawa,
G. Chen, A. J. Achkar, D. G. Hawthron, T. Z. Regier and H. Wadati, AIP Advances 6 (2016) 035105(1-8).

Kondo group
We use angle-resolved photoemission spectroscopy (ARPES) with ultrahigh energy resolution. The main findings in 2015 are as
follows: (1) Quadratic Fermi Node in a 3D Strongly Correlated Semimetal. (2) Point nodes persisting far beyond Tc in Bi2212.
1.

Tunable spin current due to bulk insulating property in the topological insulator Tl1−xBi1+xSe2−δ: K. Kuroda, G. Eguchi,
K. Shirai, M. Shiraishi, M. Ye, K. Miyamoto, T. Okuda, S. Ueda, M. Arita, H. Namatame, M. Taniguchi, Y. Ueda and A.
Kimura, Phys. Rev. B 91 (2015) 205306.

2.

†*

3.

†*

4.

*

5.

†*

6.

Pairing, pseudogap and Fermi arcs in cuprates.: A. Kaminski, T. Kondo, T. Takeuchi and G. Gu, Philosophical Magazine
95 (2015) 453-466.

7.

*

8.

Generation of Transient Photocurrents in the Topological Surface State of Sb2Te3 by Direct Optical Excitation with
Midinfrared Pulses: K. Kuroda, J. Reimann, J. Güdde and U. Höfer, Phys. Rev. Lett. 116 (2016) 076801.

9.

†*

Point nodes persisting far beyond Tc in Bi2212: T. Kondo, W. Malaeb, Y. Ishida, T. Sasagawa, H. Sakamoto, T.
Takeuchi, T. Tohyama and S. Shin, Nat. Commun. 6 (2015) 7699(8 pages).
Quadratic Fermi Node in a 3D Strongly Correlated Semimetal: T. Kondo, M. Nakayama, R. Chen, J. J. Ishikawa, E.
-G. Moon, T. Yamamoto, Y. Ota, W. Malaeb, H. Kanai, Y. Nakashima, Y. Ishida, R. Yoshida, H. Yamamoto, M. Matsunami, S. Kimura, N. Inami, K. Ono, H. Kumigashira, S. Nakatsuji, L. Balents and S. Shin, Nat. Commun. 6 (2015)
10042(1-8).
Optically detecting the edge-state of a three-dimensional topological insulator under ambient conditions by ultrafast
infrared photoluminescence spectroscopy: S.-Y. Maezawa, H. Watanabe, M. Takeda, K. Kuroda, T. Someya, I. Matsuda
and T. Suemoto, Sci. Rep. 5 (2015) 16443(1-8).
Ultrafast electron dynamics at the Dirac node of the topological insulator Sb2Te3: S. Zhu, Y. Ishida, K. Kuroda, K.
Sumida, M. Ye, J. Wang, H. Pan, M. Taniguchi, S. Qiao, S. Shin and A. Kimura, Sci. Rep. 5 (2015) 13213(1-6).

High-resolution three-dimensional spin- and angle-resolved photoelectron spectrometer using vacuum ultraviolet laser
light: K. Yaji, A. Harasawa, K. Kuroda, S. Toyohisa, M. Nakayama, Y. Ishida, A. Fukushima, S. Watanabe, C. Chen, F.
Komori and S. Shin, Rev. Sci. Instrum. 87 (2016) 053111(1-6).

Spin Polarization and Texture of the Fermi Arcs in the Weyl Fermion Semimetal TaAs: S.-Y. Xu, I. Belopolski, D.
S. Sanchez, M. Neupane, G. Chang, K. Yaji, Z. Yuan, C. Zhang, K. Kuroda, G. Bian, C. Guo, H. Lu, T.-R. Chang, N.
Alidoust, H. Zheng, C.-C. Lee, S.-M. Huang, C.-H. Hsu, H.-T. Jeng, A. Bansil, T. Neupert, F. Komori, T. Kondo, S.
Shin, H. Lin, S. Jia and M. Zahid Hasan, Phys. Rev. Lett. 116 (2016) 096801(1-7).

10. †* 角度分解光電子分光による精密測定で解き明かす銅酸化物高温超伝導体の擬ギャップと超伝導ギャップの競合関係 : 近
藤 猛 , 竹内 恒博 , 辛 埴 , 固体物理 51 (2016) 203-221.

Okazaki group
We have developed and improved a time- and angle-resolved photoemission (TrARPES) apparatus using EUV and SX lasers byhigh harmonics generation (HHG). In the fiscal year 2015, we have installed a new Ti:Sapphire regenerative amplifier systemand fairly improved a performance and stability of this apparatus. We have studied nonequilibrium electronic states of semiconductor surfaces, graphene, high-Tc cuprates, iron-based superconductors, and strongly correlated electron systems. Particularly,
we have observed coherent phonon excitations both in the hole and electron Fermi surfaces of a parent compound of iron-based
superconductors BaFe2As2. In addition, we have also investigated superconducting-gap structures of iron-based superconductors
and BiS2-based superconductors by a low-temperature and high-resolution laser ARPES apparatus.
1.

†*

2.

Dependence of electron correlation strength in Fe1+yTe1−xSex on Se content: L. C. C. Ambolode, K. Okazaki, M. Horio,
H. Suzuki, L. Liu, S. Ideta, T. Yoshida, T. Mikami, T. Kakeshita, S. Uchida, K. Ono, H. Kumigashira, M. Hashimoto, D.
-H. Lu, Z. -X. Shen and A. Fujimori, Phys. Rev. B 92 (2015) 035104.

Low-Temperature and High-Energy-Resolution Laser Photoemission Spectroscopy: T. Shimojima, K. Okazaki and S.
Shin, J. Phys. Soc. Jpn. 84 (2015) 072001(1-26).

† Joint research with outside partners.

ISSP Activity Report 2015

189

3.

In-plane electronic anisotropy in the antiferromagnetic orthorhombic phase of isovalent-substituted Ba(Fe1−xRux)2As2:
L. Liu, T. Mikami, S. Ishida, K. Koshiishi, K. Okazaki, T. Yoshida, H. Suzuki, M. Horio, L. C. C. Ambolode, J. Xu, H.
Kumigashira, K. Ono, M. Nakajima, K. Kihou, C. H. Lee, A. Iyo, H. Eisaki, T. Kakeshita, S. Uchida and A. Fujimori,Phys. Rev. B 92 (2015) 094503(1-5).

4.

†*

5.

Reversed anisotropy of the in-plane resistivity in the antiferromagnetic phase of iron tellurides: L. Liu, T. Mikami, M.
Takahashi, S. Ishida, T. Kakeshita, K. Okazaki, A. Fujimori and S. Uchida, Phys. Rev. B 91 (2015) 134502.

6.

†*

7.

Suppression of the antiferromagnetic pseudogap in the electron-doped high-temperature superconductor by protect
annealing: M. Horio, T. Adachi, Y. Mori, A. Takahashi, T. Yoshida, H. Suzuki, L. C. C. Ambolode, K. Okazaki, K. Ono,
H. Kumigashira, H. Anzai, M. Arita, H. Namatame, M. Taniguchi, D. Ootsuki, K. Sawada, M. Takahashi, T. Mizokawa,
Y. Koike and A. Fujimori, Nat. Commun. 7 (2016) 10567(1-8).

Nonequilibrium electronic and phonon dynamics of Cu0.17Bi2Se3 investigated by core-level and valence-bandtime-resolved photoemission spectroscopy: T. Yamamoto, Y. Ishida, R. Yoshida, M. Okawa, K. Okazaki, T. Kanai, A.
Kikkawa, Y. Taguchi, T. Kiss, K. Ishizaka, N. Ishii, J. Itatani, S. Watanabe, Y. Tokura, T. Saitoh and S. Shin, Phys. Rev.
B 92 (2015) 121106(1-6).

高次高調波の固体時間分解光電子分光への応用 Application of High Harmonic Generation to Time-Resolved Photoemission Spectroscopy of Solids: 岡崎 浩三 , 辛 埴 , レーザー研究 43 (12) (2015) 838-843.

* Joint research among groups within ISSP.

190

ISSP Activity Report 2015