Electron correlation induced spontaneous symmetry breaking and weyl semimetal phase in a strongly spin-orbit coupled system

Akihiko Sekine, Kentaro Nomura

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

We study theoretically the electron correlation effect in a three-dimensional (3D) Dirac fermion system which describes a topologically nontrivial state. It is shown within the mean-field approximation that time-reversal and inversion symmetries of the system are spontaneously broken in the region where both spin-orbit coupling and electron correlation are strong. This phase is considered as a condensed-matter analog of the corresponding phase in the lattice quantum chromodynamics (QCD). It is also shown that in the presence of magnetic impurities, electron correlation enhances the appearance of the Weyl semimetal phase between the topological insulator phase and the normal insulator phase.

Original languageEnglish
Article number033702
Journaljournal of the physical society of japan
Volume82
Issue number3
DOIs
Publication statusPublished - 2013 Mar 1

Keywords

  • Electron correlation
  • Spontaneous symmetry breaking
  • Topological insulator
  • Weyl semimetal
  • Wilson fermion

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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