• Rapid Communication

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

Jan Carl Budich, Ronny Thomale, Gang Li, Manuel Laubach, and Shou-Cheng Zhang
Phys. Rev. B 86, 201407(R) – Published 16 November 2012

Abstract

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.

  • Figure
  • Figure
  • Received 13 March 2012

DOI:https://doi.org/10.1103/PhysRevB.86.201407

©2012 American Physical Society

Authors & Affiliations

Jan Carl Budich1,2, Ronny Thomale1, Gang Li2, Manuel Laubach2, and Shou-Cheng Zhang1

  • 1Department of Physics, Stanford University, Stanford, California 94305, USA
  • 2Institute for Theoretical Physics and Astrophysics, University of Würzburg, 97074 Würzburg, Germany

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 86, Iss. 20 — 15 November 2012

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×