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 

作者机构：National Laboratory of Solid State Microstructures and Department of PhysicsNanjing University Department of Physics and AstronomyCalifornia State University 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2013年第22卷第6期

页      面：32-48页

核心收录：

学科分类：07[理学] 070201[理学-理论物理] 0702[理学-物理学] 

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) 

主　　题：spin-polarized transport quantum spin Hall effect surface state edge state topological insulator 

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.