Crossover from Ising to mean-field critical behavior in a kinetic Ising model with competing flip and exchange dynamics

M. Droz, Z. Rácz and P. Tartaglia

Physica A: Statistical Mechanics and its Applications, 1991, vol. 177, issue 1, 401-406

Abstract: A two-dimensional kinetic Ising model evolving by a combination of spin flips at temperature T and spin exchanges which are random and of arbitrary range is investigated. We present a mean-field theory and compare its predictions with Monte Carlo simulations. The results indicate that the equilibrium Ising transition that is present without the spin exchanges turns into a mean-field transition as soon as the spin-exchange rate is different from zero. The crossover from Ising to mean-field critical behavior is characterized by an exponent, Φ ≈ 2, equal to the analogous crossover exponent in equilibrium systems.

Date: 1991
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:177:y:1991:i:1:p:401-406

DOI: 10.1016/0378-4371(91)90179-G

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