Spin Chern numbers and time-reversal-symmetry-broken quantum spin Hall effect  

作　　者：盛利 李会超 杨运友 盛冬宁 邢定钰 

机构地区：[1]National Laboratory of Solid State Microstructures and Department of Physics,Nanjing University [2]Department of Physics and Astronomy,California State University

出　　处：《Chinese Physics B》2013年第6期32-48,共17页中国物理B（英文版）

基　　金：supported by the National Basic Research Program of China (Grant Nos. 2009CB929504,2011CB922103,and 2010CB923400);the National Natural Science Foundation of China (Grant Nos. 11225420,11074110,11174125,11074109,and 91021003);the Priority Academic Program Development of Jiangsu Higher Education Institutions,China,the US NSF (Grant Nos. DMR-0906816 and DMR-1205734);Princeton MRSEC (Grant No. DMR-0819860)

摘　　要：The quantum spin Hall （QSH） effect is considered to be unstable to perturbations violating the time-reversal （TR） symmetry. We review some recent developments in the search of the QSH effect in the absence of the TR symmetry. The possibility to realize a robust QSH effect by artificial removal of the TR symmetry of the edge states is explored. As a useful tool to characterize topological phases without the TR symmetry, the spin-Chern number theory is introduced.The quantum spin Hall （QSH） effect is considered to be unstable to perturbations violating the time-reversal （TR） symmetry. We review some recent developments in the search of the QSH effect in the absence of the TR symmetry. The possibility to realize a robust QSH effect by artificial removal of the TR symmetry of the edge states is explored. As a useful tool to characterize topological phases without the TR symmetry, the spin-Chern number theory is introduced.

关 键 词：spin-polarized transport quantum spin Hall effect surface state edge state topological insulator 

分 类 号：O413[理学—理论物理]