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Dynamic scaling in vacancy-mediated disordering

B. Schmittmann·R. K. P. Zia·Wannapong Triampo
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Abstract

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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B. Schmittmann, R. K. P. Zia, Wannapong Triampo. 1999-12-08. Dynamic scaling in vacancy-mediated disordering. https://doi.org/10.1590/s0103-97332000000100014

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