Evolution of surface states in Bi1-xSbx alloys across the topological phase transition

H. Guo, K. Sugawara, Akari Takayama, S. Souma, T. Sato, N. Satoh, A. Ohnishi, M. Kitaura, M. Sasaki, Q. K. Xue, T. Takahashi

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number201104
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume83
Issue number20
DOIs
Publication statusPublished - 2011 May 31
Externally publishedYes

Fingerprint

Surface states
Electronic states
Photoelectron spectroscopy
Fermi level
Orbits
Phase transitions
Bandwidth
photoelectric emission
bandwidth
orbits
expansion
high resolution
electronics
spectroscopy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Evolution of surface states in Bi1-xSbx alloys across the topological phase transition. / Guo, H.; Sugawara, K.; Takayama, Akari; Souma, S.; Sato, T.; Satoh, N.; Ohnishi, A.; Kitaura, M.; Sasaki, M.; Xue, Q. K.; Takahashi, T.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 83, No. 20, 201104, 31.05.2011.

Research output: Contribution to journalArticle

Guo, H, Sugawara, K, Takayama, A, Souma, S, Sato, T, Satoh, N, Ohnishi, A, Kitaura, M, Sasaki, M, Xue, QK & Takahashi, T 2011, 'Evolution of surface states in Bi1-xSbx alloys across the topological phase transition', Physical Review B - Condensed Matter and Materials Physics, vol. 83, no. 20, 201104. https://doi.org/10.1103/PhysRevB.83.201104
Guo, H. ; Sugawara, K. ; Takayama, Akari ; Souma, S. ; Sato, T. ; Satoh, N. ; Ohnishi, A. ; Kitaura, M. ; Sasaki, M. ; Xue, Q. K. ; Takahashi, T. / Evolution of surface states in Bi1-xSbx alloys across the topological phase transition. In: Physical Review B - Condensed Matter and Materials Physics. 2011 ; Vol. 83, No. 20.
@article{afdfc59bab4543e0a15aa0e6cfcc211c,
title = "Evolution of surface states in Bi1-xSbx alloys across the topological phase transition",
abstract = "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.",
author = "H. Guo and K. Sugawara and Akari Takayama and S. Souma and T. Sato and N. Satoh and A. Ohnishi and M. Kitaura and M. Sasaki and Xue, {Q. K.} and T. Takahashi",
year = "2011",
month = "5",
day = "31",
doi = "10.1103/PhysRevB.83.201104",
language = "English",
volume = "83",
journal = "Physical Review B-Condensed Matter",
issn = "0163-1829",
publisher = "American Institute of Physics Publising LLC",
number = "20",

}

TY - JOUR

T1 - Evolution of surface states in Bi1-xSbx alloys across the topological phase transition

AU - Guo, H.

AU - Sugawara, K.

AU - Takayama, Akari

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.

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.

UR - http://www.scopus.com/inward/record.url?scp=79961109266&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79961109266&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.83.201104

DO - 10.1103/PhysRevB.83.201104

M3 - Article

VL - 83

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 0163-1829

IS - 20

M1 - 201104

ER -