First- and second-order phase transitions in a driven lattice gas with nearest-neighbor exclusion
Abstract
A lattice gas with infinite repulsion between particles separated by lattice spacing, and nearest-neighbor hopping dynamics, is subject to a drive favoring movement along one axis of the square lattice. The equilibrium (zero drive) transition to a phase with sublattice ordering, known to be continuous, shifts to lower density, and becomes discontinuous for large bias. In the ordered nonequilibrium steady state, both the particle and order-parameter densities are nonuniform, with a large fraction of the particles occupying a jammed strip oriented along the drive. The relaxation exhibits features reminiscent of models of granular and glassy materials.
Keywords
Cite
@article{arxiv.cond-mat/0009339,
title = {First- and second-order phase transitions in a driven lattice gas with nearest-neighbor exclusion},
author = {Ronald Dickman},
journal= {arXiv preprint arXiv:cond-mat/0009339},
year = {2009}
}
Comments
8 pages, 5 figures; results due to bad random number generator corrected; significantly revised conclusions