Electron Correlation Induced Spontaneous Symmetry Breaking and Weyl Semimetal Phase in a Strongly Spin-Orbit Coupled System
Strongly Correlated Electrons
2013-02-12 v1 Mesoscale and Nanoscale Physics
Abstract
We study theoretically the electron correlation effect in a three-dimensional 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 an analog of that in the lattice quantum chromodynamics. 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.
Keywords
Cite
@article{arxiv.1212.6218,
title = {Electron Correlation Induced Spontaneous Symmetry Breaking and Weyl Semimetal Phase in a Strongly Spin-Orbit Coupled System},
author = {Akihiko Sekine and Kentaro Nomura},
journal= {arXiv preprint arXiv:1212.6218},
year = {2013}
}
Comments
4 pages, 3 figures