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

研究成果: Article

22 引用 (Scopus)

抄録

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.

元の言語English
記事番号201104
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
83
発行部数20
DOI
出版物ステータスPublished - 2011 5 31
外部発表Yes

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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

これを引用

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.

:: Physical Review B - Condensed Matter and Materials Physics, 巻 83, 番号 20, 201104, 31.05.2011.

研究成果: Article

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, 巻. 83, 番号 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. :: Physical Review B - Condensed Matter and Materials Physics. 2011 ; 巻 83, 番号 20.
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AU - Sugawara, K.

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AU - Souma, S.

AU - Sato, T.

AU - Satoh, N.

AU - Ohnishi, A.

AU - Kitaura, M.

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AU - Xue, Q. K.

AU - Takahashi, T.

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