254 citations · 3.6k across the 95 of their papers we have counts for
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Linear Magnetoresistance and Type-I Superconductivity in -IrSn
Nazir Ahmad, Shunsuke Shimada, Takumi Hasegawa +6
Layered material -IrSn (, , #142), whose electron bands have symmetry-enforced Dirac points, was investigated using high-quality single crystals. It e…
Superconductivity in In-doped AgSnBiTe3 with possible band inversion
Tsubasa Mitobe, Kazuhisa Hoshi, Md. Riad Kasem +9
We investigated the chemical pressure effects on structural and electronic properties of SnTe-based material using partial substitution of Sn by Ag0.5Bi0.5, which results in lattic…
Synthesis of new high-entropy alloy-type Nb3 (Al, Sn, Ge, Ga, Si) superconductors
Aichi Yamashita, Tatsuma D. Matsuda, Yoshikazu Mizuguchi
Studies on high-entropy alloy (HEA) superconductors have recently been increasing, particularly in the fields of materials science and condensed matter physics. To contribute to re…
Synthesis of high-entropy-alloy-type superconductors (Fe,Co,Ni,Rh,Ir)Zr2 with tunable transition temperature
Md. Riad Kasem, Aichi Yamashita, Yosuke Goto +2
We report on the synthesis and superconductivity of high-entropy-alloy-type (HEA-type) compounds TrZr2 (Tr = Fe, Co, Ni, Rh, Ir), in which the Tr site satisfies the criterion of HE…
Superconductivity enhanced by -band filling in LaAl with = Mo and W
Rumika Miyawaki, Naoki Nakamura, Ryuji Higashinaka +2
Electrical resistivity, magnetic susceptibility, and specific heat measurements on single crystals of LaAl with = Mo and W revealed that these compounds exhibit s…
Superconductivity in CuAl2-type Co0.2Ni0.1Cu0.1Rh0.3Ir0.3Zr2 with a high-entropy-alloy transition metal site
Yoshikazu Mizuguchi, Md. Riad Kasem, Tatsuma D. Matsuda
Research on high-entropy-alloy (HEA) superconductors is a growing field in material science. In this study, we explored new HEA-type superconductors and discovered a CuAl2-type sup…
Bulk superconductivity induced by Se substitution in self-doped BiCh2-based compound CeOBiS2-xSex
Ryosuke Kiyama, Yosuke Goto, Kazuhisa Hoshi +7
We report the Se substitution effects on the crystal structure, superconducting properties, and valence states of self-doped BiCh2-based compound CeOBiS2-xSex. Polycrystalline CeOB…
Superconducting properties of high-entropy-alloy tellurides M-Te (M: Ag, In, Cd, Sn, Sb, Pb, Bi) with a NaCl-type structure
Md. Riad Kasem, Kazuhisa Hoshi, Rajveer Jha +6
High-entropy-alloy-type tellurides M-Te, which contain five different metals of M = Ag, In, Cd, Sn, Sb, Pb, and Bi, were synthesized using high pressure synthesis. Structural chara…
Superconductivity in Se-doped La2O2Bi2Pb2S6-xSex with a Bi2Pb2Ch4-type thick conducting layer
Rajveer Jha, Yosuke Goto, Tatsuma D. Matsuda +2
La2O2Bi2Pb2S6 is a layered Bi-based oxychalcogenide with a thick four-layer-type conducting layer. Although La2O2Bi2Pb2S6 is a structural analogue of La2O2Bi3AgS6, which is a super…
Detection of hole pockets in the candidate type-II Weyl semimetal MoTe from Shubnikov-de Haas quantum oscillations
Y. J. Hu, W. C. Yu, Kwing To Lai +12
The bulk electronic structure of -MoTe features large hole Fermi pockets at the Brillouin zone center () and two electron Fermi surfaces along the direction. Howe…
Enhanced superconductivity by Na doping in SnAs-based layered compound NaSnAs
Hao Yuwen, Yosuke Goto, Rajveer Jha +6
Superconducting transition temperature (Tc) reported in SnAs-based layered compound NaSnAs varies from 1.2 to 1.6 K, implying that its superconductivity is critically sensi…
Effect of Indium doping on the superconductivity of layered oxychalcogenide La2O2Bi3Ag1-xInxS6
Rajveer Jha, Yosuke Goto, Tatsuma D Matsuda +2
We report on the substitution effect of Indium (In) at the Ag site of layered oxychalcogenide La2O2Bi3Ag1-xInxS6. The Tc decreases with increasing In concentration. A hump in the n…
Two-Fold-Symmetric Magnetoresistance in Single Crystals of Tetragonal BiCh2-Based Superconductor LaO0.5F0.5BiSSe
Kazuhisa Hoshi, Motoi Kimata, Yosuke Goto +2
We have investigated the in-plane anisotropy of the c-axis magnetoresistance for single crystals of a BiCh2-based superconductor LaO0.5F0.5BiSSe under in-plane magnetic fields. We…
Bulk superconductivity in La2O2M4S6-type layered oxychalcogenide La2O2Bi3Ag0.6Sn0.4S5.7Se0.3
Rajveer Jha, Yosuke Goto, Tatsuma D. Matsuda +4
Recently, we reported the observation of superconductivity at ~0.5 K in a La2O2M4S6-type (M: metal) layered oxychalcogenide La2O2Bi3AgS6, which is a layered compound related to the…
Superconductivity in layered Oxychalcogenide La2O2Bi3AgS6
Rajveer Jha, Yosuke Goto, Ryuji Higashinaka +3
We report the superconductivity in layered oxychalcogenide La2O2Bi3AgS6 compound. The La2O2Bi3AgS6 compound has been reported recently by our group, which has a tetragonal structur…
Na1-xSn2P2 as a new member of van der Waals-type layered tin pnictide superconductors
Yosuke Goto, Akira Miura, Chikako Moriyoshi +4
Superconductors with a van der Waals (vdW) structure have attracted a considerable interest because of the possibility for truly two-dimensional (2D) superconducting systems. We re…
Superconductivity in Cage Compounds LaAl with = Ti, V, Nb, and Ta
Akira Yamada, Ryuji Higashinaka, Tatsuma D. Matsuda +1
Electrical resistivity, magnetic susceptibility, and specific heat measurements on single crystals of LaAl ( = Ti, V, Nb, and Ta) revealed that these four compou…
SnAs-based layered superconductor NaSn2As2
Yosuke Goto, Akira Yamada, Tatsuma D. Matsuda +2
Superconductivity with exotic properties has often been discovered in materials with a layered (two-dimensional) crystal structure. The low dimensionality affects the electronic st…
Anisotropic two-gap superconductivity and the absence of a Pauli paramagnetic limit in single-crystalline LaOFBiS
Y. C. Chan, K. Y. Yip, Y. W. Cheung +9
Ambient-pressure-grown LaOFBiS with a superconducting transition temperature 3K possesses a highly anisotropic normal state. By a series of electrica…
Intrinsic Phase Diagram of Superconductivity in the BiCh2-based System Without In-plane Disorder
Kouhei Nagasaka, Atsuhiro Nishida, Rajveer Jha +11
We have investigated the crystal structure and physical properties of LaO1-xFxBiSSe to reveal the intrinsic superconductivity phase diagram of the BiCh2-based layered compound fami…
Bulk Superconductivity Induced by In-plane Chemical Pressure Effect in Eu0.5La0.5FBiS2-xSex
Gen Jinno, Rajveer Jha, Akira Yamada +6
We have investigated Se substitution effect to superconductivity of an optimally-doped BiS2-based superconductor Eu0.5La0.5FBiS2. Eu0.5La0.5FBiS2-xSex samples with x = 0-1 were syn…
Specific Heat and Electrical Transport Properties of Sn0.8Ag0.2Te Superconductor
Yoshikazu Mizuguchi, Akira Yamada, Ryuji Higashinaka +4
Sn0.8Ag0.2Te is a new superconductor with Tc ~ 2.4 K. The superconducting properties of Sn0.8Ag0.2Te have been investigated by specific heat measurements under magnetic fields. Bul…
Localized and mixed valence state of Ce in superconducting and ferromagnetic CeOFBiS revealed by x-ray absorption and photoemission spectroscopy
T. Sugimoto, D. Ootsuki, E. Paris +11
We have performed Ce -edge x-ray absorption spectroscopy (XAS) and Ce - resonant photoemission spectroscopy (PES) on single crystals of CeOFBiS for $x=…
Effect of Geomagnetism on 101Ru Nuclear Quadrupole Resonance Measurements of CeRu2
Masahiro Manago, Kenji Ishida, Tatsuma D. Matsuda +1
We performed 101Ru nuclear quadrupole resonance (NQR) measurements on the s-wave superconductor CeRu2 and found oscillatory behavior in the spin-echo amplitude at the +-1/2 <-> +-3…