Phase diagram of a two-dimensional lattice gas model of a ramp system.
Using Monte Carlo simulation and fundamental measure theory we study the phase diagram of a two-dimensional lattice gas model with a nearest neighbor hard core exclusion and a next-to-nearest neighbor finite repulsive interaction. The model presents two competing ranges of interaction and, in common with many experimental systems, exhibits a low density solid phase, which melts back to the fluid phase upon compression. The theoretical approach is found to provide a qualitatively correct picture of the phase diagram of our model system.
Almarza
Noé G
NG
Instituto de Química-Física Rocasolano, Consejo Superior de Investigaciones Científicas, C/Serrano 119, E-28006 Madrid, Spain. noe@iqfr.csic.es
Capitán
José A
JA
Cuesta
José A
JA
Lomba
Enrique
E