Absence of Bose condensation on lattices with moat bands
Quantum Gases
2014-05-20 v2 Strongly Correlated Electrons
Abstract
We study hard-core bosons on a class of frustrated lattices with the lowest Bloch band having a degenerate minimum along a closed contour, the moat, in the reciprocal space. We show that at small density the ground state of the system is given by a noncondensed state, which may be viewed as a state of fermions subject to Chern-Simons gauge field. At fixed density of bosons, such a state exhibits domains of incompressible liquids. Their fixed densities are given by fractions of the reciprocal-space area enclosed by the moat.
Keywords
Cite
@article{arxiv.1303.7272,
title = {Absence of Bose condensation on lattices with moat bands},
author = {Tigran A. Sedrakyan and Leonid I. Glazman and Alex Kamenev},
journal= {arXiv preprint arXiv:1303.7272},
year = {2014}
}
Comments
5 pages, 5 figures, Revtex, Published in PRB Rapid Commun