Quantum spin Hall effect in inverted InAs/GaSb quantum wells

被引：35
作者：
Knez, Ivan [1 ]
Du, Rui-Rui [1 ]
机构：
[1] Rice Univ, Dept Phys & Astron, Houston, TX 77251 USA
来源：
FRONTIERS OF PHYSICS | 2012年 / 7卷 / 02期
关键词：
quantum spin Hall effect; InAs/GaSb quantum wells; topological insulators; INSULATOR; HYBRIDIZATION;
D O I：
10.1007/s11467-011-0204-1
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We review the recent experimental progress towards observing quantum spin Hall effect in inverted InAs/GaSb quantum wells (QWs). Low temperature transport measurements in the hybridization gap show bulk conductivity of a non-trivial origin, while the length and width dependence of conductance in this regime show strong evidence for the existence of helical edge modes proposed by Liu et al. [Phys. Rev. Lett., 2008, 100: 236601]. Surprisingly, edge modes persist in spite of comparable bulk conduction and show only weak dependence on magnetic field. We elucidate that seeming independence of edge on bulk transport comes due to the disparity in Fermi-wave vectors between the bulk and the edge, leading to a total internal reflection of the edge modes.
引用
收藏
页码：200 / 207
页数：8
相关论文
共 28 条
[1]   SCALING THEORY OF LOCALIZATION - ABSENCE OF QUANTUM DIFFUSION IN 2 DIMENSIONS [J].
ABRAHAMS, E ;
ANDERSON, PW ;
LICCIARDELLO, DC ;
RAMAKRISHNAN, TV .
PHYSICAL REVIEW LETTERS, 1979, 42 (10) :673-676
[2]   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
[3]   Landau Quantization of Topological Surface States in Bi2Se3 [J].
Cheng, Peng ;
Song, Canli ;
Zhang, Tong ;
Zhang, Yanyi ;
Wang, Yilin ;
Jia, Jin-Feng ;
Wang, Jing ;
Wang, Yayu ;
Zhu, Bang-Fen ;
Chen, Xi ;
Ma, Xucun ;
He, Ke ;
Wang, Lili ;
Dai, Xi ;
Fang, Zhong ;
Xie, Xincheng ;
Qi, Xiao-Liang ;
Liu, Chao-Xing ;
Zhang, Shou-Cheng ;
Xue, Qi-Kun .
PHYSICAL REVIEW LETTERS, 2010, 105 (07)
[4]   Resistance resonance induced by electron-hole hybridization in a strongly coupled InAs/GaSb/AlSb heterostructure [J].
Cooper, LJ ;
Patel, NK ;
Drouot, V ;
Linfield, EH ;
Ritchie, DA ;
Pepper, M .
PHYSICAL REVIEW B, 1998, 57 (19) :11915-11918
[5]  
Datta S., 1997, Electronic transport in mesoscopic systems, DOI DOI 10.1063/1.2807624
[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]   Colloquium: Topological insulators [J].
Hasan, M. Z. ;
Kane, C. L. .
REVIEWS OF MODERN PHYSICS, 2010, 82 (04) :3045-3067
[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]   Quantum spin Hall effect in graphene [J].
Kane, CL ;
Mele, EJ .
PHYSICAL REVIEW LETTERS, 2005, 95 (22)
[10]  
Knez I., IN PRESS
123