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Unusual surface states associated with the PT-symmetry breaking and antiferromagnetic band folding in NdSb
Asuka Honma, Daichi Takane, Seigo Souma +8
We have performed micro-focused angle-resolved photoemission spectroscopy on NdSb which exhibits the type-I antiferromagnetism below TN = 16 K. We succeeded in selectively observin…
Unveiling quasiparticle dynamics of topological insulators through Bayesian modelling
Satoru Tokuda, Seigo Souma, Kouji Segawa +4
Quasiparticle - a key concept to describe interacting particles - characterizes electron-electron interaction in metals (Fermi liquid) and electron pairing in superconductors. Whil…
Dirac Fermion kinetics in three-dimensionally curved graphene
Yoichi Tanabe, Yoshikazu Ito, Katsuaki Sugawara +6
Three dimensionally curved graphene with a wide range of curvature radii from 25 nm to 1000 nm demonstrates that nano-scale curvature is a new degree of freedom to tune the transpo…
Signature of band inversion in the antiferromagnetic phase of axion insulator candidate EuIn2As2
Takafumi Sato, Zhiwei Wang, Daichi Takane +12
We have performed angle-resolved photoemission spectroscopy on EuIn2As2 which is predicted to be an axion insulator in the antiferromagnetic state. By utilizing soft-x-ray and vacu…
Unusual temperature evolution of band structure of Bi(111) studied by angle-resolved photoemission spectroscopy and density functional theory
Takafumi Sato, Keiko Yamada, Takao Kosaka +5
We have performed angle-resolved photoemission spectroscopy of Bi(111) thin films grown on Si(111), and investigated the evolution of band structure with temperature. We revealed a…
Observation of inverted band structure in topological Dirac-semimetal candidate CaAuAs
Kosuke Nakayama, Zhiwei Wang, Daichi Takane +13
We have performed high-resolution angle-resolved photoemission spectroscopy of ternary pnictide CaAuAs which is predicted to be a three-dimensional topological Dirac semimetal (TDS…