Aging and Domain Growth in the Two-Dimensional Ising Spin Glass Model

Interrupted aging in the two-dimensional Ising spin glass model with Gaussian couplings is established and investigated via extensive Monte Carlo simulations. The spin autocorrelation function scales with t /τ( t w ), where t w is the waiting time and τ is equal to t w for waiting times smaller than the equilibration time τ eq . The spatial correlations scale with r /ξ( t w ), where the correlation length ξ gives information about the averaged domain size in the system. Our results are better compatible with an algebraic growth law for ξ( t w ), although it can also nicely be fitted to (log t w ) 1/ψ with ψ ≈ 0.63.