Fluctuation-induced topological quantum phase transitions in quantum spin-Hall and anomalous-Hall insulators

被引：70

作者：

Budich, Jan Carl ^{[1
,2
]}

Thomale, Ronny ^{[1
]}

Li, Gang ^{[2
]}

Laubach, Manuel ^{[2
]}

Zhang, Shou-Cheng ^{[1
]}

机构：

[1] Stanford Univ, Dept Phys, Stanford, CA 94305 USA

[2] Univ Wurzburg, Inst Theoret Phys & Astrophys, D-97074 Wurzburg, Germany

来源：

PHYSICAL REVIEW B | 2012年 / 86卷 / 20期

关键词：

WELLS; MODEL;

D O I：

10.1103/PhysRevB.86.201407

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We investigate the role of quantum fluctuations in topological quantum phase transitions of quantum spin-Hall insulators and quantum anomalous-Hall insulators. Employing the variational cluster approximation to obtain the single-particle Green's function of the interacting many-body system, we characterize different phases by direct calculation of the recently proposed topological order parameter for interacting systems. We pinpoint the influence of quantum fluctuations on the quantum spin Hall to Mott insulator transition in several models. Furthermore, we propose a general mechanism by which a topological quantum phase transition can be driven by the divergence of the self-energy induced by interactions.

引用

页数：4

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