Repulsive Fermi gases in a two-dimensional lattice with non-Abelian gauge fields
Strongly Correlated Electrons
2020-01-22 v1 Quantum Gases
Abstract
Motivated by the recent experiment realizing bidirectional spin-orbit-coupled Bose-Einstein condensates (BEC), we theoretically explore the properties of repulsive fermions in the two-dimensional (2D) optical lattice with such non-Abelian gauge fields. Within the mean-field level, we find a novel phase of topological antiferromagnetic (TAFM) order which incorporates both the non-trivial topology due to spin-flip hopping and spontaneous symmetry breaking (SSB) for the in-plane spin order. We argue that the appearance of such a phase is generic for repulsive fermions in Chern bands achieved through spin-orbit coupling. Our work paves the way for further studies of fermionic generalization of 2D non-Abelian spin-orbit-coupled quantum gases.
Keywords
Cite
@article{arxiv.2001.06757,
title = {Repulsive Fermi gases in a two-dimensional lattice with non-Abelian gauge fields},
author = {Yi-Xiang Wang and Fuxiang Li},
journal= {arXiv preprint arXiv:2001.06757},
year = {2020}
}