Study of the critical behavior of the driven lattice gas model with limited nonequilibrium dynamics
| Autor: | M. A. Bab, M. Leticia Rubio Puzzo, G. P. Saracco |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Statistics and Probability
Physics DRIVEN DIFFUSIVE SYSTEMS Phase transition Condensed matter physics PHASE TRANSITIONS Ciencias Físicas Monte Carlo method Non-equilibrium thermodynamics Thermodynamics Otras Ciencias Físicas Condensed Matter Physics 01 natural sciences 010305 fluids & plasmas Lattice (order) 0103 physical sciences Exponent Ising model NONEQUILIBRIUM SYSTEMS MONTE CARLO SIMULATIONS 010306 general physics Anisotropy CIENCIAS NATURALES Y EXACTAS Lattice model (physics) |
| Zdroj: | Physica A: Statistical Mechanics and its Applications. 467:307-314 |
| ISSN: | 0378-4371 |
| Popis: | In this paper the nonequilibrium critical behavior is investigated using a variant of the well-known two-dimensional driven lattice gas (DLG) model, called modified driven lattice gas (MDLG). In this model, the application of the external field is regulated by a parameter pϵ[0, 1] in such a way that if p = 0, the field is not applied, and it becomes the Ising model, while if p = 1, the DLG model is recovered. The behavior of the model is investigated for several values of p by studying the dynamic evolution of the system within the short-time regime in the neighborhood of a phase transition. It is found that the system experiences second-order phase transitions in all the interval of p for the density of particles ρ = 0.5. The determined critical temperatures Tc (p) are greater than the critical temperature of the Ising model T I c , and increase with p up to the critical temperature of the DLG model in the limit of infinite driving fields. The dependence of Tc (p) on p is compatible with a power-law behavior whose exponent is ψ = 0.27(3). Furthermore, the complete set of the critical and the anisotropic exponents is estimated. For the smallest value of p, the dynamics and β exponents are close to that calculated for the Ising model, and the anisotropic exponent ∆ is near zero. As p is increased, the exponents and ∆ change, meaning that the anisotropy effects increase. For the largest value investigated, the set of exponents approaches to that reported by the most recent theoretical framework developed for the DLG model. Fil: Saracco, Gustavo Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina Fil: Rubio Puzzo, Maria Leticia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina Fil: Bab, Marisa Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect