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

M. Droz, Z. Rácz, P. Tartaglia

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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.

Original languageEnglish
Pages (from-to)401-406
Number of pages6
JournalPhysica A: Statistical Mechanics and its Applications
Issue number1-3
Publication statusPublished - Sep 15 1991


ASJC Scopus subject areas

  • Statistics and Probability
  • Condensed Matter Physics

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