Phase Diagram of the Lattice Restricted Primitive Model
Abstract
We present a comprehensive study of the lattice restricted primitive model, i.e., a lattice gas consisting of an equal number of positively and negatively charged particles interacting via on-site exclusion and a 1/r potential. On the cubic lattice, Monte Carlo simulations show a line of Neel points separating a disordered, high-temperature phase from a phase with global antiferromagnetic order. At low temperatures the (high-density) ordered phase coexists with the (low-density) disordered phase. The Neel line meets the coexistence curve at a tricritical point, T_t \simeq 0.14, rho_t \simeq 0.4. A simple mean-field analysis is in qualitative agreement with simulations.
Keywords
Cite
@article{arxiv.cond-mat/9906364,
title = {Phase Diagram of the Lattice Restricted Primitive Model},
author = {Ronald Dickman and George Stell},
journal= {arXiv preprint arXiv:cond-mat/9906364},
year = {2009}
}
Comments
Contribution to the AIP Conference on Treatment of Electrostatic Interactions in Computer Simulations of Condensed Media 25 pages, 16 figures