Effects of surface modification on the properties of topological surface states in Bi2Se3

被引：7

作者：

Wang, Xiaoxiong ^{[1
]}

Wang, Peng ^{[2
]}

Huang, Decai ^{[1
]}

Tan, Weishi ^{[1
]}

机构：

[1] Nanjing Univ Sci & Technol, Coll Sci, Nanjing 210094, Jiangsu, Peoples R China

[2] Zhejiang Univ, Dept Phys, Hangzhou 310007, Zhejiang, Peoples R China

来源：

PHYSICS LETTERS A | 2012年 / 376卷 / 05期

关键词：

Bi2Se3; Topological surface states; Surface modification; First principles; SINGLE DIRAC CONE; INSULATOR;

D O I：

10.1016/j.physleta.2011.12.022

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The effects of surface modification on the topological surface states in Bi2Se3 have been studied using first-principles calculations. Although surface modification cannot change the topological order, however, the spin polarization, dispersion of topological surface bands and the position of Dirac points are altered. All the studied surface modifications can push Dirac cone upwards effectively. Bi-capped surface can attract the quantum well states into bulk band gap, forming new Dirac cone at (M) over bar point. Both Bi-capped and Se-removed surface can slightly enhance spin polarization of topological surface states, while flatten the energy dispersion of the topological surface bands above Dirac point. (C) 2011 Published by Elsevier B.V.

引用

页码：768 / 772

页数：5

共 32 条

[1] Quantum spin Hall effect and topological phase transition in HgTe quantum wells [J].

Bernevig, B. Andrei ;

Hughes, Taylor L. ;

Zhang, Shou-Cheng .

SCIENCE, 2006, 314 (5806) :1757-1761

[2] Coexistence of the topological state and a two-dimensional electron gas on the surface of Bi2Se3 [J].

Bianchi, Marco ;

Guan, Dandan ;

Bao, Shining ;

Mi, Jianli ;

Iversen, Bo Brummerstedt ;

King, Philip D. C. ;

Hofmann, Philip .

NATURE COMMUNICATIONS, 2010, 1

[3]

Chang J., 2010, ARXIV10122927

[4] CO Oxidation Facilitated by Robust Surface States on Au-Covered Topological Insulators [J].

Chen, Hua ;

Zhu, Wenguang ;

Xiao, Di ;

Zhang, Zhenyu .

PHYSICAL REVIEW LETTERS, 2011, 107 (05)

[5] Topological insulators with inversion symmetry [J].

Fu, Liang ;

Kane, C. L. .

PHYSICAL REVIEW B, 2007, 76 (04)

[6] Superconducting proximity effect and Majorana fermions at the surface of a topological insulator [J].

Fu, Liang ;

Kane, C. L. .

PHYSICAL REVIEW LETTERS, 2008, 100 (09)

[7] Hexagonal Warping Effects in the Surface States of the Topological Insulator Bi2Te3 [J].

Fu, Liang .

PHYSICAL REVIEW LETTERS, 2009, 103 (26)

[8] A brief introduction to the ABINIT software package [J].

Gonze, X ;

Rignanese, GM ;

Verstraete, M ;

Beuken, JM ;

Pouillon, Y ;

Caracas, R ;

Jollet, F ;

Torrent, M ;

Zerah, G ;

Mikami, M ;

Ghosez, P ;

Veithen, M ;

Raty, JY ;

Olevano, V ;

Bruneval, F ;

Reining, L ;

Godby, R ;

Onida, G ;

Hamann, DR ;

Allan, DC .

ZEITSCHRIFT FUR KRISTALLOGRAPHIE, 2005, 220 (5-6) :558-562

[9] ABINIT: First-principles approach to material and nanosystem properties [J].

Gonze, X. ;

Amadon, B. ;

Anglade, P. -M. ;

Beuken, J. -M. ;

Bottin, F. ;

Boulanger, P. ;

Bruneval, F. ;

Caliste, D. ;

Caracas, R. ;

Cote, M. ;

Deutsch, T. ;

Genovese, L. ;

Ghosez, Ph. ;

Giantomassi, M. ;

Goedecker, S. ;

Hamann, D. R. ;

Hermet, P. ;

Jollet, F. ;

Jomard, G. ;

Leroux, S. ;

Mancini, M. ;

Mazevet, S. ;

Oliveira, M. J. T. ;

Onida, G. ;

Pouillon, Y. ;

Rangel, T. ;

Rignanese, G. -M. ;

Sangalli, D. ;

Shaltaf, R. ;

Torrent, M. ;

Verstraete, M. J. ;

Zerah, G. ;

Zwanziger, J. W. .

COMPUTER PHYSICS COMMUNICATIONS, 2009, 180 (12) :2582-2615

[10] Relativistic separable dual-space Gaussian pseudopotentials from H to Rn [J].

Hartwigsen, C ;

Goedecker, S ;

Hutter, J .

PHYSICAL REVIEW B, 1998, 58 (07) :3641-3662

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