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Brazilian Journal of Physics

Print version ISSN 0103-9733On-line version ISSN 1678-4448

Abstract

SCHMITTMANN, B.; ZIA, R.K.P.  and  TRIAMPO, Wannapong. Dynamic scaling in vacancy-mediated disordering. Braz. J. Phys. [online]. 2000, vol.30, n.1, pp.139-151. ISSN 0103-9733.  http://dx.doi.org/10.1590/S0103-97332000000100014.

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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