Topological transition in Bi 1-xSb x studied as a function of Sb doping

Fumitaka Nakamura; Yuka Kousa; Alexey A. Taskin; Yasuo Takeichi; Akinori Nishide; Akito Kakizaki; Marie D'Angelo; Patrick Lefevre; Francois Bertran; Amina Taleb-Ibrahimi; Fumio Komori; Shin Ichi Kimura; Hiroshi Kondo; Yoichi Ando; Iwao Matsuda

doi:10.1103/PhysRevB.84.235308

Topological transition in Bi _1-xSb _x studied as a function of Sb doping

Fumitaka Nakamura, Yuka Kousa, Alexey A. Taskin, Yasuo Takeichi, Akinori Nishide, Akito Kakizaki, Marie D'Angelo, Patrick Lefevre, Francois Bertran, Amina Taleb-Ibrahimi, Fumio Komori, Shin Ichi Kimura, Hiroshi Kondo, Yoichi Ando, Iwao Matsuda

Department of Chemistry

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27 Citations (Scopus)

Abstract

Spin- and angle-resolved photoemission spectroscopy measurements were performed on Bi _1-xSb _x 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 L _s 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 x0.04 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.

Original language	English
Article number	235308
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	84
Issue number	23
DOIs	https://doi.org/10.1103/PhysRevB.84.235308
Publication status	Published - 2011 Dec 6

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.84.235308

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Nakamura, F., Kousa, Y., Taskin, A. A., Takeichi, Y., Nishide, A., Kakizaki, A., D'Angelo, M., Lefevre, P., Bertran, F., Taleb-Ibrahimi, A., Komori, F., Kimura, S. I., Kondo, H., Ando, Y., & Matsuda, I. (2011). Topological transition in Bi _1-xSb _x studied as a function of Sb doping. Physical Review B - Condensed Matter and Materials Physics, 84(23), [235308]. https://doi.org/10.1103/PhysRevB.84.235308

Topological transition in Bi _1-xSb _x studied as a function of Sb doping. / Nakamura, Fumitaka; Kousa, Yuka; Taskin, Alexey A.; Takeichi, Yasuo; Nishide, Akinori; Kakizaki, Akito; D'Angelo, Marie; Lefevre, Patrick; Bertran, Francois; Taleb-Ibrahimi, Amina; Komori, Fumio; Kimura, Shin Ichi; Kondo, Hiroshi; Ando, Yoichi; Matsuda, Iwao.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 84, No. 23, 235308, 06.12.2011.

Research output: Contribution to journal › Article › peer-review

Nakamura, F, Kousa, Y, Taskin, AA, Takeichi, Y, Nishide, A, Kakizaki, A, D'Angelo, M, Lefevre, P, Bertran, F, Taleb-Ibrahimi, A, Komori, F, Kimura, SI, Kondo, H, Ando, Y & Matsuda, I 2011, 'Topological transition in Bi _1-xSb _x studied as a function of Sb doping', Physical Review B - Condensed Matter and Materials Physics, vol. 84, no. 23, 235308. https://doi.org/10.1103/PhysRevB.84.235308

Nakamura, Fumitaka ; Kousa, Yuka ; Taskin, Alexey A. ; Takeichi, Yasuo ; Nishide, Akinori ; Kakizaki, Akito ; D'Angelo, Marie ; Lefevre, Patrick ; Bertran, Francois ; Taleb-Ibrahimi, Amina ; Komori, Fumio ; Kimura, Shin Ichi ; Kondo, Hiroshi ; Ando, Yoichi ; Matsuda, Iwao. / Topological transition in Bi _1-xSb _x studied as a function of Sb doping. In: Physical Review B - Condensed Matter and Materials Physics. 2011 ; Vol. 84, No. 23.

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abstract = "Spin- and angle-resolved photoemission spectroscopy measurements were performed on Bi 1-xSb x 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 L s 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 x0.04 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.",

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Topological transition in Bi _1-xSb _x studied as a function of Sb doping

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