Three-dimensional topological insulators in the octahedron-decorated cubic lattice

Three-dimensional topological insulators in the octahedron-decorated cubic lattice
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八面体装饰立方晶格中的三维拓扑绝缘体

DOI:
10.1103/physrevb.84.075105
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发表时间:
2011-01
期刊:
影响因子:
3.7
通讯作者:
Guo-Xiang Wang
Guo-Xiang Wang
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Jing-Min Hou;Wen-Xin Zhang;Guo-Xiang Wang

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研究了八面体缀饰立方晶格中自旋轨道耦合的紧束缚模型。我们计算了晶格的能带结构并计算了Z_2拓扑指数。根据Z_2拓扑指数和能带结构,给出了不同填充率的相图。我们发现在一定的参数范围内,当填充分数为1/6,1/2和2/3时,强拓扑绝缘体(1;111)和强拓扑绝缘体(1;000)出现.此外,$(0;111)$弱拓扑绝缘体被发现在1/6和2/3填充分数。我们分析和讨论了这些拓扑绝缘体的特性及其表面态。
We investigate a tight-binding model of the octahedron-decorated cubic lattice with 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 the $(1;111)$ and $(1;000)$ strong topological insulators occur in some range of parameters at 1/6, 1/2 and 2/3 filling fractions. Additionally, the $(0;111)$ weak topological insulator is found at 1/6 and 2/3 filing fractions. We analyze and discuss the characteristics of these topological insulators and their surfaces states.
DOI: 10.1136/ebmh.11.4.102
发表时间: 2008-10
期刊: Evidence Based Mental Health
影响因子: --
作者:
P. Cochat;L. Vaucoret;J. Sarles
通讯作者: P. Cochat;L. Vaucoret;J. Sarles