Growth Law and Superuniversality in the Coarsening of Disordered Ferromagnets

摘要: We present comprehensive numerical results for domain growth in the two-dimensional {\it Random Bond Ising Model} (RBIM) with nonconserved Glauber kinetics. characterize evolution via law}, and two-time quantities like autocorrelation function} autoresponse function}. Our clearly establish that law shows a crossover from pre-asymptotic regime "power-law disorder-dependent exponent" to an asymptotic "logarithmic growth". compare this behavior previous on one-dimensional disordered systems we propose unifying picture renormalization group framework. also study corresponding scaling functions quantities. Super-universality is found not hold. Clear evidence supporting dimensionality dependence of exponent function obtained.