BROWNIAN-VACANCY-MEDIATED DISORDERING DYNAMICS

The disordering of an initially phase-segregated system of finite size , induced by the presence of highly mobile vacancies, is shown to exhi bit dynamic scaling in its late stages. A set of characteristic expone nts is introduced and computed analytically, in excellent agreement wi th Monte Carlo data. In particular, the characteristic time scale, con trolling the crossover between increasing disorder and saturation, is found to depend on the exponent scaling the number of vacancies in the sample.