Fermionic symmetry-protected topological state in strained graphene
Strongly Correlated Electrons
2017-08-29 v1 Mesoscale and Nanoscale Physics
Abstract
The low-energy physics of graphene is described by relativistic Dirac fermions with spin and valley degrees of freedom. Mechanical strain can be used to create a pseudo magnetic field pointing to opposite directions in the two valleys. We study interacting electrons in graphene exposed to both an external real magnetic field and a strain-induced pseudo magnetic field. For a certain ratio between these two fields, it is proposed that a fermionic symmetry-protected topological state can be realized. The state is characterized in detail using model wave functions, Chern-Simons field theory, and numerical calculations. Our paper suggests that graphene with artificial gauge fields may host a rich set of topological states.
Cite
@article{arxiv.1708.08040,
title = {Fermionic symmetry-protected topological state in strained graphene},
author = {Ying-Hai Wu and Tao Shi and G. J. Sreejith and Zheng-Xin Liu},
journal= {arXiv preprint arXiv:1708.08040},
year = {2017}
}
Comments
8 pages, 4 figures