Hexagonal Warping Effects in the Surface States of the Topological Insulator Bi2Te3

被引：670

作者：

Fu, Liang ^{[1
]}

机构：

[1] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 103卷 / 26期

关键词：

SINGLE DIRAC CONE; REALIZATION;

D O I：

10.1103/PhysRevLett.103.266801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A single two-dimensinoal Dirac fermion state has been recently observed on the surface of the topological insulator Bi2Te3 by angle-resolved photoemission spectroscopy. We study the surface band structure using k center dot p theory and find an unconventional hexagonal warping term, which is the counterpart of cubic Dresselhaus spin-orbit coupling in rhombohedral structures. We show that this hexagonal warping term naturally explains the observed hexagonal snowflake Fermi surface. The strength of hexagonal warping is characterized by a single parameter, which is extracted from the size of the Fermi surface. We predict a number of testable signatures of hexagonal warping in spectroscopy experiments on Bi2Te3. We also explore the possibility of a spin-density wave due to strong nesting of the Fermi surface.

引用

收藏

页数：4

相关论文

共 20 条

[1]

ALPICHSHEV Z, ARXIV09080371

[2] Experimental Realization of a Three-Dimensional Topological Insulator, Bi2Te3 [J].

Chen, Y. L. ;

Analytis, J. G. ;

Chu, J. -H. ;

Liu, Z. K. ;

Mo, S. -K. ;

Qi, X. L. ;

Zhang, H. J. ;

Lu, D. H. ;

Dai, X. ;

Fang, Z. ;

Zhang, S. C. ;

Fisher, I. R. ;

Hussain, Z. ;

Shen, Z. -X. .

SCIENCE, 2009, 325 (5937) :178-181

[3] Topological insulators in three dimensions [J].

Fu, Liang ;

Kane, C. L. ;

Mele, E. J. .

PHYSICAL REVIEW LETTERS, 2007, 98 (10)

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

Fu, Liang ;

Kane, C. L. .

PHYSICAL REVIEW B, 2007, 76 (04)

[5] 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)

[6] MODEL FOR A QUANTUM HALL-EFFECT WITHOUT LANDAU-LEVELS - CONDENSED-MATTER REALIZATION OF THE PARITY ANOMALY [J].

HALDANE, FDM .

PHYSICAL REVIEW LETTERS, 1988, 61 (18) :2015-2018

[7] p-type Bi2Se3 for topological insulator and low-temperature thermoelectric applications [J].

Hor, Y. S. ;

Richardella, A. ;

Roushan, P. ;

Xia, Y. ;

Checkelsky, J. G. ;

Yazdani, A. ;

Hasan, M. Z. ;

Ong, N. P. ;

Cava, R. J. .

PHYSICAL REVIEW B, 2009, 79 (19)

[8] A topological Dirac insulator in a quantum spin Hall phase [J].

Hsieh, D. ;

Qian, D. ;

Wray, L. ;

Xia, Y. ;

Hor, Y. S. ;

Cava, R. J. ;

Hasan, M. Z. .

NATURE, 2008, 452 (7190) :970-U5

[9] A tunable topological insulator in the spin helical Dirac transport regime [J].

Hsieh, D. ;

Xia, Y. ;

Qian, D. ;

Wray, L. ;

Dil, J. H. ;

Meier, F. ;

Osterwalder, J. ;

Patthey, L. ;

Checkelsky, J. G. ;

Ong, N. P. ;

Fedorov, A. V. ;

Lin, H. ;

Bansil, A. ;

Grauer, D. ;

Hor, Y. S. ;

Cava, R. J. ;

Hasan, M. Z. .

NATURE, 2009, 460 (7259) :1101-1105

[10] Observation of Unconventional Quantum Spin Textures in Topological Insulators [J].

Hsieh, D. ;

Xia, Y. ;

Wray, L. ;

Qian, D. ;

Pal, A. ;

Dil, J. H. ;

Osterwalder, J. ;

Meier, F. ;

Bihlmayer, G. ;

Kane, C. L. ;

Hor, Y. S. ;

Cava, R. J. ;

Hasan, M. Z. .

SCIENCE, 2009, 323 (5916) :919-922