Symmetry-protected quantum phase transition in topological insulators

L. Liu (), X. Zhang and S. Kou

The European Physical Journal B: Condensed Matter and Complex Systems, 2012, vol. 85, issue 8, 1-6

Abstract: 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. Copyright EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2012

Keywords: Mesoscopic and Nanoscale Systems (search for similar items in EconPapers)
Date: 2012
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DOI: 10.1140/epjb/e2012-30123-2

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