230 citations · 1.4k across the 25 of their papers we have counts for
25 papers
Carrier-tunable RKKY magnetism in a crystalline magnet
Xiang S. W. Huang, Bruno K. Saika, Satoshi Hamao +10
In itinerant magnets governed by the Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction, the exchange coupling depends on both the moment-moment distance and the Fermi wavevector…
Emergent Cooperative Superstructures via Order-Disorder Kinetics in Molecule-Intercalated NbSe2
Taiga Ueda, Hideki Matsuoka, Shungo Aoyagi +12
The design of quantum states at heterointerfaces has enabled a variety of emergent phenomena. Among them, molecular intercalation superlattices have attracted attention as tunable…
Direct observation of the surface superconducting gap in the topological superconductor candidate β-PdBi2
Akifumi Mine, Takeshi Suzuki, Yigui Zhong +7
β-PdBi2 is one of the candidates for topological superconductors with a superconducting (SC) transition temperature (Tc) of 5.3 K, in which parity mixing of spin singlet and spin t…
Direct observation of band structure modifications from monolayer WSe2 to Janus WSSe
Masato Sakano, Shunsuke Akatsuka, Takato Yamamoto +19
Janus monolayer transition metal dichalcogenides (TMDs), created by post-growth substitution of the top chalcogen layer, represent a new direction for engineering 2D crystal proper…
Electronic Structure of Kramers Nodal-Line Semimetal YAuGe and Anomalous Hall Effect Induced by Magnetic Rare-Earth Substitution
Takashi Kurumaji, Jorge I. Facio, Natsuki Mitsuishi +11
Nodal-line semimetals are a class of topological materials hosting one dimensional lines of band degeneracy. Kramers nodal-line (KNL) metals/semimetals have recently been theoretic…
Unveiling the orbital-selective electronic band reconstruction through the structural phase transition in TaTe
Natsuki Mitsuishi, Yusuke Sugita, Tomoki Akiba +8
Tantalum ditelluride TaTe belongs to the family of layered transition metal dichalcogenides but exhibits a unique structural phase transition at around 170 K that accompanies t…
Ultrafast Control of Crystal Structure in a Topological Charge-Density-Wave Material
Takeshi Suzuki, Yuya Kubota, Natsuki Mitsuishi +15
Optical control of crystal structures is a promising route to change physical properties including topological nature of a targeting material. Time-resolved X-ray diffraction measu…
Signature of topological band crossing in ferromagnetic Cr1/3NbSe2 epitaxial thin film
Bruno Kenichi Saika, Satoshi Hamao, Yuki Majima +14
In intercalated transition metal dichalcogenides (I-TMDC), transition metal intercalation introduces magnetic phases which in some cases induce topological band crossing. However,…
Direct observation of the layer-number-dependent electronic structure in few-layer WTe2
M. Sakano, Y. Tanaka, S. Masubuchi +9
When a crystal becomes thinner and thinner to the atomic level, peculiar phenomena discretely depending on its layer-numbers (n) start to appear. The symmetry and wave functions st…
Competing spin modulations in a magnetically frustrated semimetal EuCuSb
Hidefumi Takahashi, Kai Aono, Yusuke Nambu +6
The competing magnetic ground states of the itinerant magnet EuCuSb, which has a hexagonal layered structure, were studied via magnetization, resistivity, and neutron diffraction m…
Devil's staircase transition of the electronic structures in CeSb
Kenta Kuroda, Y. Arai, N. Rezaei +21
Solids with competing interactions often undergo complex phase transitions with a variety of long-periodic modulations. Among such transition, devil's staircase is the most complex…
Switching of band inversion and topological surface states by charge density wave
N. Mitsuishi, Y. Sugita, M. S. Bahramy +14
Topologically nontrivial materials host protected edge states associated with the bulk band inversion through the bulk-edge correspondence. Manipulating such edge states is highly…
Hybridization between the ligand band and Fe-3 orbitals in the p-type ferromagnetic semiconductor (Ga,Fe)Sb
Takahito Takeda, Masahiro Suzuki, Le Duc Anh +13
(Ga,Fe)Sb is a promising ferromagnetic semiconductor for practical spintronic device applications because its Curie temperature () is above room temperature. However, th…
Intrinsic 2D Ferromagnetism in V5Se8 Epitaxial Thin Films
Masaki Nakano, Yue Wang, Satoshi Yoshida +11
The discoveries of intrinsic ferromagnetism in atomically-thin van der Waals crystals have opened up a new research field enabling fundamental studies on magnetism at two-dimension…
Radial spin texture in elemental tellurium with chiral crystal structure
M. Sakano, M. Hirayama, T. Takahashi +18
The chiral crystal is characterized by a lack of mirror symmetry and an inversion center, resulting in the inequivalent right- and left-handed structures. In the noncentrosymmetric…
Evolution of electronic states and emergence of superconductivity in the polar semiconductor GeTe by doping valence-skipping In
M. Kriener, M. Sakano, M. Kamitani +7
GeTe is a chemically simple IV-VI semiconductor which bears a rich plethora of different physical properties induced by doping and external stimuli. These include, among others, fe…
Discovery of switchable weak topological insulator state in quasi-one-dimensional bismuth iodide
R. Noguchi, T. Takahashi, K. Kuroda +16
The major breakthroughs in the understanding of topological materials over the past decade were all triggered by the discovery of the Z topological insulator (TI). In three dim…
Direct Mapping of Spin and Orbital Entangled Wavefunction under Interband Spin-Orbit coupling of Rashba Spin-Split Surface States
Ryo Noguchi, Kenta Kuroda, K. Yaji +6
We use spin- and angle-resolved photoemission spectroscopy (SARPES) combined with polarization-variable laser and investigate the spin-orbit coupling effect under interband hybridi…
Observation of spin-polarized bands and domain-dependent Fermi arcs in polar Weyl semimetal MoTe
M. Sakano, M. S. Bahramy, H. Tsuji +9
We investigate the surface electronic structures of polar 1T'-MoTe2, the Weyl semimetal candidate realized through the nonpolar-polar structural phase transition, by utilizing the…
Topologically protected surface states in a centrosymmetric superconductor beta-PdBi2
M. Sakano, K. Okawa, M. Kanou +4
The topological aspects of electrons in solids emerge in realistic matters as represented by topological insulators. They are expected to show a variety of new magneto-electric phe…
Momentum-dependent sign-inversion of orbital polarization in superconducting FeSe
Y. Suzuki, T. Shimojima, T. Sonobe +14
We investigate the electronic reconstruction across the tetragonal-orthorhombic structural transition in FeSe by employing polarization-dependent angle-resolved photoemission spect…
Lifting of xz/yz orbital degeneracy at the structural transition in detwinned FeSe
T. Shimojima, Y. Suzuki, T. Sonobe +14
We study superconducting FeSe (Tc = 9 K) exhibiting the tetragonal-orthorhombic structural transition (Ts = 90 K) without any antiferromagnetic ordering, by utilizing angle-resolve…
Strongly spin-orbit coupled two-dimensional electron gas emerging near the surface of polar semiconductors
M. Sakano, M. S. Bahramy, A. Katayama +12
We investigate the two-dimensional (2D) highly spin-polarized electron accumulation layers commonly appearing near the surface of n-type polar semiconductors BiTeX (X = I, Br, and…
Three-dimensional bulk band dispersion in polar BiTeI with giant Rashba-type spin splitting
M. Sakano, J. Miyawaki, A. Chainani +12
In layered polar semiconductor BiTeI, giant Rashba-type spin-split band dispersions show up due to the crystal structure asymmetry and the strong spin-orbit interaction. Here we in…