Phase separation in supersolids
Superconductivity
2009-10-31 v1
Abstract
We study quantum phase transitions in the ground state of the two dimensional hard-core boson Hubbard Hamiltonian. Recent work on this and related models has suggested ``supersolid'' phases with simultaneous diagonal and off-diagonal long range order. We show numerically that, contrary to the generally held belief, the most commonly discussed ``checkerboard'' supersolid is thermodynamically unstable. Furthermore, this supersolid cannot be stabilized by next near neighbour interaction. We obtain the correct phase diagram using the Maxwell construction. We demonstrate the ``striped'' supersolid is thermodynamically stable and is separated from the superfluid phase by a continuous phase transition.
Cite
@article{arxiv.cond-mat/9909198,
title = {Phase separation in supersolids},
author = {G. G. Batrouni and R. T. Scalettar},
journal= {arXiv preprint arXiv:cond-mat/9909198},
year = {2009}
}
Comments
4 pages, 4 eps figures, included