Connection topology of step edge state bands at the surface of a three dimensional topological insulator

被引：8

作者：

Xu, Yishuai ^{[1
]}

Jiang, Guodong ^{[2
]}

Chiu, Janet ^{[1
]}

Miao, Lin ^{[1
,3
]}

Kotta, Erica ^{[1
]}

Zhang, Yutan ^{[1
]}

Biswas, Rudro R. ^{[2
]}

Wray, L. Andrew ^{[1
]}

机构：

[1] NYU, Dept Phys, 4 Washington Pl, New York, NY 10003 USA

[2] Purdue Univ, Dept Phys & Astron, W Lafayette, IN 47907 USA

[3] Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA

来源：

NEW JOURNAL OF PHYSICS | 2018年 / 20卷

基金：

美国国家科学基金会;

关键词：

topological insulator; edge state; surface science; numerical simulation; SINGLE DIRAC CONE; BI2SE3; BI2TE3;

D O I：

10.1088/1367-2630/aacef6

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Topological insulators (TIs) in the Bi2Se3 family manifest helical Dirac surface states that span the topologically ordered bulk band gap. Recent scanning tunneling microscopy measurements have discovered additional states in the bulk band gap of Bi2Se3 and Bi2Te3, localized at one-dimensional step edges. Here numerical simulations of a TI surface are used to explore the phenomenology of edge state formation at the single-quintuple layer step defects found ubiquitously on these materials. The modeled one-dimensional edge states are found to exhibit a stable topological connection to the two-dimensional surface state Dirac point.

引用

页数：12

共 42 条

[1] STM Imaging of Impurity Resonances on Bi2Se3 [J].

Alpichshev, Zhanybek ;

Biswas, Rudro R. ;

Balatsky, Alexander V. ;

Analytis, J. G. ;

Chu, J. -H. ;

Fisher, I. R. ;

Kapitulnik, A. .

PHYSICAL REVIEW LETTERS, 2012, 108 (20)

[2] STM imaging of a bound state along a step on the surface of the topological insulator Bi2Te3 [J].

Alpichshev, Zhanybek ;

Analytis, J. G. ;

Chu, J. -H. ;

Fisher, I. R. ;

Kapitulnik, A. .

PHYSICAL REVIEW B, 2011, 84 (04)

[3] STM Imaging of Electronic Waves on the Surface of Bi2Te3: Topologically Protected Surface States and Hexagonal Warping Effects [J].

Alpichshev, Zhanybek ;

Analytis, J. G. ;

Chu, J. -H. ;

Fisher, I. R. ;

Chen, Y. L. ;

Shen, Z. X. ;

Fang, A. ;

Kapitulnik, A. .

PHYSICAL REVIEW LETTERS, 2010, 104 (01)

[4] Electric multipole moments, topological multipole moment pumping, and chiral hinge states in crystalline insulators [J].

Benalcazar, Wladimir A. ;

Bernevig, B. Andrei ;

Hughes, Taylor L. .

PHYSICAL REVIEW B, 2017, 96 (24)

[5] Quantized electric multipole insulators [J].

Benalcazar, Wladimir A. ;

Bernevig, B. Andrei ;

Hughes, Taylor L. .

SCIENCE, 2017, 357 (6346) :61-66

[6] Scattering from surface step edges in strong topological insulators [J].

Biswas, Rudro R. ;

Balatsky, Alexander V. .

PHYSICAL REVIEW B, 2011, 83 (07)

[7] Impurity-induced states on the surface of three-dimensional topological insulators [J].

Biswas, Rudro R. ;

Balatsky, A. V. .

PHYSICAL REVIEW B, 2010, 81 (23)

[8] Spontaneous gap generation on the surface of weakly interacting topological insulators using nonmagnetic impurities [J].

Black-Schaffer, Annica M. ;

Yudin, Dmitry .

PHYSICAL REVIEW B, 2014, 90 (16)

[9] Subsurface impurities and vacancies in a three-dimensional topological insulator [J].

Black-Schaffer, Annica M. ;

Balatsky, Alexander V. .

PHYSICAL REVIEW B, 2012, 86 (11)

[10] Strong potential impurities on the surface of a topological insulator [J].

Black-Schaffer, Annica M. ;

Balatsky, Alexander V. .

PHYSICAL REVIEW B, 2012, 85 (12)

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