1. Topological transition in Bi1-xSbx studied as a function of Sb doping.
- Author
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Nakamura, Fumitaka, Kousa, Yuka, Taskin, Alexey A., Takeichi, Yasuo, Nishide, Akinori, Kakizaki, Akito, D' Angelo, Marie, Lefevre, Patrick, Bertran, Francois, Taleb-Ibrahimi, Amina, Fumio Komori, Shin-ichi Kimura, Hiroshi Kondo, Yoichi Ando, and Iwao Matsuda
- Subjects
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PHOTOEMISSION , *PHOTOELECTRONS , *SPECTRUM analysis , *TOPOLOGY , *CRYSTALS - Abstract
Spin- and angle-resolved photoemission spectroscopy measurements were performed on Bi1-x, Sbx samples at x = 0.04, 0.07, and 0.21 to study the change of the surface band structure from nontopological to topological. Energy shift of the T and Ls bulk bands with Sb concentration is quantitatively evaluated. An edge state becomes topologically nontrivial at x = 0.04. An additional trivial edge state appears at the L band gap that forms at x > 0.04 and apparently hybridize with the nontrivial edge state. A scenario for the topological transition mechanism is presented. Related issues of self-energy and temperature dependence of the surface state are also considered. [ABSTRACT FROM AUTHOR]
- Published
- 2011
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