paper

Off-Equilibrium Dynamics in Finite-Dimensional Spin Glass Models

arXiv:cond-mat/9507046 · doi:10.1103/PhysRevB.53.6418

Abstract

The low temperature dynamics of the two- and three-dimensional Ising spin glass model with Gaussian couplings is investigated via extensive Monte Carlo simulations. We find an algebraic decay of the remanent magnetization. For the autocorrelation function a typical aging scenario with a scaling is established. Investigating spatial correlations we find an algebraic growth law of the average domain size. The spatial correlation function scales with . The sensitivity of the correlations in the spin glass phase with respect to temperature changes is examined by calculating a time dependent overlap length. In the two dimensional model we examine domain growth with a new method: First we determine the exact ground states of the various samples (of system sizes up to ) and then we calculate the correlations between this state and the states generated during a Monte Carlo simulation.

38 pages, RevTeX, 14 postscript figures

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