Phases of attractive spin-imbalanced fermions in square lattices
Quantum Gases
2013-10-21 v2 Strongly Correlated Electrons
Abstract
We determine the relative stability of different ground-state phases of spin-imbalanced popula- tions of attractive fermions in square lattices. The phases are systematically characterized by the symmetry of the order parameter and the real- and momentum-space structures using Hartree- Fock-Bogoliubov theory. We find several type of unidirectional Larkin-Ovchinikov-type phases. We discuss the effect of commensuration between the ordering wave vector and the density imbalance, and describe the mechanism of Fermi surface reconstruction and pairing for various orders. A robust supersolid phase is shown to exist when the ordering wave vector is diagonally directed.
Keywords
Cite
@article{arxiv.1303.3812,
title = {Phases of attractive spin-imbalanced fermions in square lattices},
author = {Simone Chiesa and Shiwei Zhang},
journal= {arXiv preprint arXiv:1303.3812},
year = {2013}
}
Comments
6.5 pages, 5 figures