174 citations · 759 across the 20 of their papers we have counts for
20 papers
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…
Unveiling van Hove singularity modulation and fluctuated charge order in kagome superconductor via time-resolved ARPES
Yigui Zhong, Takeshi Suzuki, Hongxiong Liu +10
Kagome superconductor CsV3Sb5, which exhibits intertwined unconventional charge density wave (CDW) and superconductivity, has garnered significant attention recently. Despite exten…
Unveiling phase diagram of the lightly doped high-Tc cuprate superconductors with disorder removed
Kifu Kurokawa, Shunsuke Isono, Yoshimitsu Kohama +11
The currently established electronic phase diagram of cuprates is based on a study of single- and double-layered compounds. These CuO planes, however, are directly contacted wi…
Nodeless electron pairing in CsVSb-derived kagome superconductors
Yigui Zhong, Jinjin Liu, Xianxin Wu +19
The newly discovered kagome superconductors represent a promising platform for investigating the interplay between band topology, electronic order, and lattice geometry. Despite ex…
Photo-induced nonlinear band shift and valence transition in SmS
Yitong Chen, Takuto Nakamura, Hiroshi Watanabe +12
The photo-induced band structure variation of a rare-earth-based semiconductor, samarium monosulfide (SmS), was investigated using high-harmonic-generation laser-based time-resolve…
Phase-resolved frequency-domain analysis of the photoemission spectra for photoexcited 1T-TaS2 in the Mott insulating charge density wave state
Q. -H. Ren, T. Suzuki, T. Kanai +3
We investigate the nonequilibrium electronic structure of 1T-TaS2 by time- and angle-resolved photoemission spectroscopy. We observe that strong photoexcitation induces the collaps…
Band-dependent superconducting gap in SrFe(AsP) studied by angle-resolved photoemission spectroscopy
H. Suzuki, T. Kobayashi, S. Miyasaka +12
The isovalent-substituted iron pnictide compound SrFe(AsP) exhibits multiple evidence for nodal superconductivity via various experimental probes, such as…
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…
Kondo hybridization and quantum criticality in -YbAlB by laser-ARPES
C. Bareille, S. Suzuki, M. Nakayama +6
We report an angle-resolved photoemission (ARPES) study of -YbAlB, which is known to harbor unconventional quantum criticality (QC) without any tuning. We directly observe a…
Unusual nodal behaviors of the superconducting gap in the iron-based superconductor Ba(FeRu)As: Effects of spin-orbit coupling
L. Liu, K. Okazaki, T. Yoshida +22
We have investigated the superconducting gap of optimally doped Ba(FeRu)As by angle-resolved photoemission spectroscopy (APRES) using bulk-sensitive 7 eV…
Quasi-particles ultrafastly releasing kink bosons to form Fermi arcs in a cuprate superconductor
Y. Ishida, T. Saitoh, T. Mochiku +3
In a conventional framework, superconductivity is lost at a critical temperature (T_c) because, at higher temperatures, gluing bosons can no longer bind two electrons into a Cooper…
Point nodes persisting far beyond Tc in Bi2212
Takeshi Kondo, W. Malaeb, Y. Ishida +5
In contrast to a complex feature of antinodal state, suffering from competing order(s), the "pure" pairing gap of cuprates is obtained in the nodal region, which therefore holds th…
Observation of quasiparticles for phase incoherent d-wave pairing in Bi2212
Takeshi Kondo, W. Malaeb, Y. Ishida +3
In contrast to a complex feature of antinodal state, suffering from competing order(s), the "pure" pairing gap of cuprates is detected in the nodal region, which therefore holds th…
Evidence of a universal relation between electron-mode coupling and Tc in Ba1-xKxFe2As2 superconductor from Laser ARPES
W. Malaeb, T. Shimojima, Y. Ishida +15
We performed a Laser angle-resolved photoemission spectroscopy (ARPES) study on a wide doping range of Ba1-xKxFe2As2 (BaK) iron-based superconductor. We observed a robust low-bindi…
Evidence for exclusion of the possibility of -wave superconducting-gap symmetry in Ba-doped KFeAs
Y. Ota, K. Okazaki, Y. Kotani +12
We have investigated the superconducting(SC)-gap anisotropy for several Ba-doped KFeAs samples using laser-based angle-resolved photoemission spectroscopy. We show that the…
Superconductivity in an electron band just above the Fermi level: possible route to BCS-BEC superconductivity
Kozo Okazaki, Yoshiaki Ito, Yuichi Ota +10
Conventional superconductivity follows Bardeen-Cooper-Schrieffer(BCS) theory of electrons-pairing in momentum-space, while superfluidity is the Bose-Einstein condensation(BEC) of a…
Importance of both spin and orbital fluctuations in BaFe2(As1-xPx)2 : Evidence from superconducting gap anisotropy
T. Yoshida, S. Ideta, T. Shimojima +32
In the iron pnictide superconductors, two distinct unconventional mechanisms of superconductivity have been put forth: One is mediated by spin fluctuations leading to the s+- state…
Anomalous dressing of Dirac fermions in the topological surface state of Bi2Se3, Bi2Te3, and CuxBi2Se3
Takeshi Kondo, Y. Nakashima, Y. Ota +8
Quasiparticle dynamics on the topological surface state of Bi2Se3, Bi2Te3, and superconducting CuxBi2Se3 are studied by 7 eV laser-based angle resolved photoemission spectroscopy.…
Anomalous two peak structure in the Angle-resolved Photoemission Spectra of Ba1-xKxFe2As2
T. Shimojima, W. Malaeb, K. Ohgushi +13
The electronic structure near the Fermi level (EF) of Ba1-xKxFe2As2 (BaK122 ; x = 0.2 - 0.7) is studied using laser ultrahigh-resolution angle-resolved photoemission spectroscopy(A…
Electron-phonon coupling induced pseudogap and the superconducting transition in Ba0.67K0.33BiO3
A. Chainani, T. Yokoya, T. Kiss +3
We study the single particle density of states (DOS) across the superconducting transition (Tc = 31 K) in single-crystal Ba0.67K0.33BiO3 using ultrahigh resolution angle-integrated…