TY - JOUR
T1 - Evolution of surface states in Bi1-xSbx alloys across the topological phase transition
AU - Guo, H.
AU - Sugawara, K.
AU - Takayama, A.
AU - Souma, S.
AU - Sato, T.
AU - Satoh, N.
AU - Ohnishi, A.
AU - Kitaura, M.
AU - Sasaki, M.
AU - Xue, Q. K.
AU - Takahashi, T.
N1 - Copyright:
Copyright 2011 Elsevier B.V., All rights reserved.
PY - 2011/5/31
Y1 - 2011/5/31
N2 - We performed a systematic, high-resolution, angle-resolved photoemission spectroscopy of Bi1-xSbx alloys to study the evolution of electronic states as a function of Sb concentration x. We revealed that the number of Fermi-level crossings is different between the topologically trivial (x= 0.023) and nontrivial (x= 0.17) phases: four and five times for the former and latter cases, respectively. We also found a systematic expansion of the bandwidth of spin-split surface bands at the Γ point upon substituting Bi with Sb, which is indicative of the monotonous reduction of the spin-orbit coupling strength.
AB - We performed a systematic, high-resolution, angle-resolved photoemission spectroscopy of Bi1-xSbx alloys to study the evolution of electronic states as a function of Sb concentration x. We revealed that the number of Fermi-level crossings is different between the topologically trivial (x= 0.023) and nontrivial (x= 0.17) phases: four and five times for the former and latter cases, respectively. We also found a systematic expansion of the bandwidth of spin-split surface bands at the Γ point upon substituting Bi with Sb, which is indicative of the monotonous reduction of the spin-orbit coupling strength.
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U2 - 10.1103/PhysRevB.83.201104
DO - 10.1103/PhysRevB.83.201104
M3 - Article
AN - SCOPUS:79961109266
SN - 0163-1829
VL - 83
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
IS - 20
M1 - 201104
ER -