425 citations · 1.5k across the 27 of their papers we have counts for
9 papers · 1 filter
Observation of the possible chiral edge mode in Bi1-xSbx
M. Sasaki, A. Ohnishi, Nabyendu Das +2
After the classification of topological states of matter has been clarified for non-interacting electron systems, the theoretical connection between gapless boundary modes and nont…
Interplay between disorder and inversion symmetry: Extreme enhancement of the mobility near the Weyl point in BiTeI
M. Sasaki, Kyoung-Min Kim, A. Ohnishi +5
We show experimental and theoretical evidence that BiTeI hosts a novel disordered metallic state named diffusive helical Fermi liquid (DHFL), characterized by a pair of concentric…
Boltzmann-equation approach to anomalous transport in a Weyl metal
Ki-Seok Kim, Heon-Jung Kim, M. Sasaki
Weyl metal is regarded as a platform toward interacting topological states of matter, where its topological structure gives rise to anomalous transport phenomena, referred to as ch…
Dirac vs. Weyl in topological insulators: Adler-Bell-Jackiw anomaly in transport phenomena
Heon-Jung Kim, Ki-Seok Kim, J. F. Wang +6
Dirac metals (gapless semi-conductors) are believed to turn into Weyl metals when perturbations, which break either time reversal symmetry or inversion symmetry, are employed. Howe…
Topological phase transitions driven by magnetic phase transitions in FexBi2Te3 (0 < x < 0.1) single crystals
Heon-Jung Kim, Ki-Seok Kim, J. -F. Wang +11
We propose a phase diagram for FexBi2Te3 (0 < x < 0.1) single crystals, which belong to a class of magnetically bulk-doped topological insulators. The evolution of magnetic correla…
Interplay between the Kondo effect and randomness: Griffiths phase in MxTiSe2 (M = Co, Ni, and Fe) single crystals
Minoru Sasaki, Akimasa Ohnishi, Takemasa Kikuchi +3
We investigate the interplay between the Kondo effect and randomness in MxTiSe2 (M = Co, Ni, and Fe) single crystals. Although the typical low-T upturn of resistivity implies the K…
Sondheimer Oscillation as a Fingerprint of Surface Dirac Fermions
Heon-Jung Kim, Ki-Seok Kim, Mun Dae Kim +7
Topological states of matter challenge the paradigm of symmetry breaking, characterized by gapless boundary modes and protected by the topological property of the ground state. Rec…
Orbital reflectometry
E. Benckiser, M. W. Haverkort, S. Brueck +13
The occupation of d-orbitals controls the magnitude and anisotropy of the inter-atomic electron transfer in transition metal oxides and hence exerts a key influence on their chemic…
Pressure dependent thermoelectric power of MgB superconductor
E. S. Choi, W. Kang, J. Y. Kim +4
We have measured temperature dependence of thermoelectric power (TEP) on MgB superconductor under hydrostatic pressure. The sign and temperature dependence of TEP shows metalli…