Short-time dynamics and critical behavior of three-dimensional site-diluted Ising model

Abstract

Monte Carlo simulations of the short-time dynamic behavior are reported for three-dimensional weakly site-diluted Ising model with spin concentrations $p=0.95$ and 0.8 at criticality. In contrast to studies of the critical behavior of the pure systems by the short-time dynamics method, our investigations of site-diluted Ising model have revealed three stages of the dynamic evolution characterizing a crossover phenomenon from the critical behavior typical for the pure systems to behavior determined by the influence of disorder. The static and dynamic critical exponents are determined with the use of the corrections to scaling for systems starting separately from ordered and disordered initial states. The obtained values of the exponents demonstrate a universal behavior of weakly site-diluted Ising model in the critical region. The values of the exponents are compared to results of numerical simulations which have been obtained in various works and, also, with results of the renormalization-group description of this model.

11 RevTeX pages, 7 figures

References in corpus (5)

• Calculations of the dynamical critical exponent using the asymptotic series summation method
• Computer simulation of the critical behavior of 3D disordered Ising model
• Short-time critical dynamics of the three-dimensional systems with long-range correlated disorder
• Relaxational dynamics in 3D randomly diluted Ising models
• Renormalization-group description of nonequilibrium critical short-time relaxation processes: a three-loop approximation

Cited by in corpus (1)

• Short-time dynamics of finite-size mean-field systems