Symmetry-protected quantum phase transition in topological insulators

被引：1
|
作者：
Liu, L. F. [1 ]
Zhang, X. L. [1 ]
Kou, S. P. [2 ]
机构：
[1] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China
[2] Beijing Normal Univ, Dept Phys, Beijing 100875, Peoples R China
来源：
EUROPEAN PHYSICAL JOURNAL B | 2012年 / 85卷 / 08期
关键词：
WELLS; STATE;
D O I：
10.1140/epjb/e2012-30123-2
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
In this paper, based on the lattice model of a topological insulator, we study the quantum phase transitions of topological insulators with different symmetry by calculating their phase diagrams and topological invariants. In particular, we investigate the symmetry-protected nature of the topological quantum phase transitions: topological quantum phase transitions can not be classified by symmetries. However, the symmetry of the system plays an important role: different topological quantum phase transitions are protected by different (global) symmetries and then described by different topological invariants.
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页数：6
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