Vacancy-mediated domain growth in a driven lattice gas

Abstract

Using Monte Carlo simulations and a mean-field theory, we study domain growth in a driven lattice gas. Mediated by a single vacancy, twospecies of particles (“charges”) unmix, so that a disordered initialconfiguration develops charge-segregated domains which grow logarithmicallyslowly. An order parameter is defined and shown to satisfy dynamic scaling.Its scaling form is computed analytically, in excellent agreement withsimulations.