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

被引：3
作者：
Hou Jing-Min [1 ]
Wang Guo-Xiang [1 ]
机构：
[1] Southeast Univ, Dept Phys, Nanjing 211189, Jiangsu, Peoples R China
来源：
COMMUNICATIONS IN THEORETICAL PHYSICS | 2013年 / 60卷 / 01期
基金：
中国国家自然科学基金;
关键词：
topological insulators; ruby lattice; rashba spin-coupling; HGTE QUANTUM-WELLS; SINGLE DIRAC CONE; SURFACE; BI2TE3; PHASE;
D O I：
10.1088/0253-6102/60/1/19
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
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 Z(2) topological indices. According to the Z(2) topological indices and the band structure, we present the phase diagrams of the lattice with different filling fractions. We find that 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.
引用
收藏
页码：129 / 135
页数：7
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