Topological Insulators on the Ruby Lattice with Rashba Spin-Orbit Coupling  

作　　者：HOU Jing-Min WANG Guo-Xiang 

机构地区：[1]Department of Physics, Southeast University, Nanjing 211189, China

出　　处：《Communications in Theoretical Physics》2013年第7期129-135,共7页理论物理通讯（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos. 11004028 and 11274061

摘　　要：We investigate a tight-binding model of the ruby lattice with Rashba spin-orbit coupling. We calculate the band structure of the lattice and evaluate the Z2 topological indices. According to the Z2 topological indices and the band structure, we present the phase diagrams of the lattice with different filling fractions. We findthat topological insulators occur in some range of parameters at 1/6, 1/3, 1/2, 2/3 and 5/6 filling fractions. We analyze and discuss the characteristics of these topological insulators and their edge states.

关 键 词：topological insulators ruby lattice rashba spin-coupling 

分 类 号：O572[理学—粒子物理与原子核物理] O623.11[理学—物理]