Quantum critical point of Dirac fermion mass generation without spontaneous symmetry breaking
Strongly Correlated Electrons
2016-12-28 v2
Abstract
We study a lattice model of interacting Dirac fermions in dimension space-time with an SU(4) symmetry. While increasing interaction strength, this model undergoes a {\it continuous} quantum phase transition from the weakly interacting Dirac semimetal to a fully gapped and nondegenerate phase without condensing any Dirac fermion bilinear mass operator. This unusual mechanism for mass generation is consistent with recent studies of interacting topological insulators/superconductors, and also consistent with recent progresses in lattice QCD community.
Keywords
Cite
@article{arxiv.1603.08376,
title = {Quantum critical point of Dirac fermion mass generation without spontaneous symmetry breaking},
author = {Yuan-Yao He and Han-Qing Wu and Yi-Zhuang You and Cenke Xu and Zi Yang Meng and Zhong-Yi Lu},
journal= {arXiv preprint arXiv:1603.08376},
year = {2016}
}
Comments
5 pages, 5 figures in main text; 10 pages, 6 figures in supplemental material