title: Phase diagram of a square-well model in two dimensions.
abstract: The phase behavior of a two-dimensional square-well model of width 1.5σ, with emphasis on the low-temperature and/or high-density region, is studied using Monte Carlo simulation in the canonical and isothermal-isobaric ensembles, and discontinuous molecular-dynamics simulation in the canonical ensemble. Several properties, such as equations of state, Binder cumulant, order parameters, and correlation functions, were computed. Numerical evidence for vapor, liquid, hexatic, and triangular solid is given, and, in addition, a non-compact solid with square-lattice symmetry is obtained. The global phase diagram is traced out in detail (or sketched approximately whenever only inaccurate information could be obtained). The solid region of the phase diagram is explained using a simple mean-field model.
authors: Instituto de Química, Universidad Nacional Autónoma de México, Apdo. Postal 70213, 04510 Coyoacán, México D.F., Mexico.
authors: Julio C
authors: JC
authors: Armas-Pérez
authors: Instituto de Química, Universidad Nacional Autónoma de México, Apdo. Postal 70213, 04510 Coyoacán, México D.F., Mexico.
authors: Jacqueline
authors: J
authors: Quintana-H
authors: Departamento de Física, Universidad Autónoma Metropolitana-Iztapalapa, Av. San Rafael Atlixco 186, Col. Vicentina, 09340 México D.F., Mexico.
authors: Gustavo A
authors: GA
authors: Chapela
authors: Departmento de Física Teórica de la Materia Condensada and Instituto de Física de la Materia Condensada, Facultad de Ciencias M05-605, Universidad Autónoma de Madrid, 28049 Madrid, Spain.
authors: Enrique
authors: E
authors: Velasco
authors: Departmento de Física Teórica de la Materia Condensada and Instituto de Física de la Materia Condensada, Facultad de Ciencias M05-605, Universidad Autónoma de Madrid, 28049 Madrid, Spain.
authors: Guillermo
authors: G
authors: Navascués