Topological transition in Bi1-xSbx studied as a function of Sb doping

被引：36

作者：

Nakamura, Fumitaka ^{[1
]}

Kousa, Yuka ^{[2
]}

Taskin, Alexey A. ^{[3
]}

Takeichi, Yasuo ^{[1
]}

Nishide, Akinori ^{[1
]}

Kakizaki, Akito ^{[1
]}

D'Angelo, Marie ^{[4
]}

Lefevre, Patrick ^{[5
]}

Bertran, Francois ^{[5
]}

Taleb-Ibrahimi, Amina ^{[5
]}

Komori, Fumio ^{[1
]}

Kimura, Shin-ichi ^{[6
]}

Kondo, Hiroshi ^{[2
]}

Ando, Yoichi ^{[3
]}

Matsuda, Iwao ^{[1
]}

机构：

[1] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan

[2] Keio Univ, Fac Sci & Technol, Yokohama, Kanagawa 2238522, Japan

[3] Osaka Univ, Inst Sci & Ind Res, Ibaraki, Osaka 5670047, Japan

[4] Univ Paris 06, Inst Nanosci Paris, CNRS UMR 7588, F-75252 Paris, France

[5] Synchrotron SOLEIL CNRS, F-91192 Gif Sur Yvette, France

[6] Natl Inst Nat Sci, Inst Mol Sci, UVSOR Facil, Okazaki, Aichi 4448585, Japan

来源：

PHYSICAL REVIEW B | 2011年 / 84卷 / 23期

关键词：

ANGLE-RESOLVED PHOTOEMISSION; SURFACE-STATE; ENERGY;

D O I：

10.1103/PhysRevB.84.235308

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Spin- and angle-resolved photoemission spectroscopy measurements were performed on Bi1-xSbx 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 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.

引用

页数：8

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