activity
20022023
most citedMaterial design with the van der Waals stacking of bismuth-halide chains realizing a higher-order topological insulator

180 citations · 1.1k across the 27 of their papers we have counts for

collaborators

27 papers

cond-mat.mtrl-sci2023

Photoemission angular distribution beyond the single wavevector description of photoelectron final states

Hiroaki Tanaka, Shota Okazaki, Yuto Fukushima +9

We develop a simulation procedure for angle-resolved photoemission spectroscopy (ARPES), where a photoelectron wave function is set to be an outgoing plane wave in a vacuum associa…

cond-mat.str-el2023★ 10 cited

Anomalously large spin-dependent electron correlation in nearly half-metallic ferromagnet CoS

Hirokazu Fujiwara, Kensei Terashima, Junya Otsuki +19

The spin-dependent band structure of CoS which is a candidate for a half-metallic ferromagnet was investigated by both spin- and angle-resolved photoemission spectroscopy and t…

cond-mat.mtrl-sci2023★ 16 cited

Time-, spin-, and angle-resolved photoemission spectroscopy with a 1-MHz 10.7-eV pulse laser

Kaishu Kawaguchi, Kenta Kuroda, Z. Zhao +12

We describe a setup of time-, spin-, and angle-resolved photoemission spectroscopy (tr-SARPES) employing a 10.7-eV (=115.6 nm) pulse laser at 1-MHz repetition rate as a probe ph…

cond-mat.mtrl-sci2023

Spin-polarized saddle points in the topological surface states of the elemental Bismuth revealed by a pump-probe spin-resolved ARPES

Yuto Fukushima, Kaishu Kawaguchi, Kenta Kuroda +11

We use a pump-probe, spin-, and angle-resolved photoemission spectroscopy (ARPES) with a 10.7 eV laser accessible up to the Brillouin zone edge, and reveal for the first time the e…

cond-mat.mtrl-sci2023★ 11 cited

A robust weak topological insulator in a bismuth halide Bi4Br2I2

Ryo Noguchi, Masaru Kobayashi, Kaishu Kawaguchi +11

We apply a topological material design concept for selecting a bulk topology of 3D crystals by different van-der-Waals stacking of 2D topological insulator layers, and find a bismu…

cond-mat.supr-con2022★ 29 cited

Direct observation of topological surface state in the topological superconductor 2M-WS2

Soohyun Cho, Soonsang Huh, Yuqiang Fang +15

The quantum spin Hall (QSH) effect has attracted extensive research interest because of the potential applications in spintronics and quantum computing, which is attributable to tw…