title: Superaging in two-dimensional random ferromagnets.
abstract: We study the aging properties, in particular the two-time autocorrelations, of the two-dimensional randomly diluted Ising ferromagnet below the critical temperature via Monte Carlo simulations. We find that the autocorrelation function displays additive aging C(t,t{w})=C{st}(t)+C{ag}(t,t{w}), where the stationary part Cst} decays algebraically. The aging part shows anomalous scaling C{ag}(t,t{w})=C[h(t)h(t{w})], where h(u) is a nonhomogeneous function excluding a t/t{w} scaling.
authors.affiliation: BIOMS, IWR, University of Heidelberg, D-69120 Heidelberg, Germany.
authors.forename: Raja
authors.initials: R
authors.lastname: Paul
authors.forename: Grégory
authors.initials: G
authors.lastname: Schehr
authors.forename: Heiko
authors.initials: H
authors.lastname: Rieger