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Monte Carlo study of a kinetic lattice model with random diffusion of disorder

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We report Monte Carlo results for a nonequilibrium Ising-like model in two and three dimensions. Nearest-neighbor interactions J change sign randomly with time due to competing kinetics. There follows a fast and random, i.e., spin-configuration-independent diffusion of Js, of the kind that takes place in dilute metallic alloys when magnetic ions diffuse. The system exhibits steady states of the ferromagnetic (antiferromagnetic) type when the probability p that J>0 is large (small) enough. No counterpart to the freezing phenomena found in quenched spin glasses occurs. We compare our results with existing mean-field and exact ones, and obtain information about critical behavior.

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Articles publicats en revistes (Física de la Matèria Condensada)

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Transformacions de fase (Física estadística)

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Monte Carlo study of a kinetic lattice model with random diffusion of disorder