Dynamic scaling in vacancy-mediated disordering

Details Dynamic scaling in vacancy-mediated disordering Dynamic scaling in vacancy-mediated disordering

1999-12-08

arxiv.org/abs/cond-mat/9912135v1

Physics

Condensed Matter

Statistical Mechanics

15 pages, 6 figures

Scientific paper

We consider the disordering dynamics of an interacting binary alloy with a small admixture of vacancies which mediate atom-atom exchanges. Starting from a perfectly phase-segregated state, the system is rapidly heated to a temperature in the disordered phase. A suitable disorder parameter, namely, the number of broken bonds, is monitored as a function of time. Using Monte Carlo simulations and a coarse-grained field theory, we show that the late stages of this process exhibit dynamic scaling, characterized by a set of scaling functions and exponents. We discuss the universality of these exponents and comment on some subtleties in the early stages of the disordering process.

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