Curvature autocorrelations in domain growth dynamics

Details Curvature autocorrelations in domain growth dynamics Curvature autocorrelations in domain growth dynamics

1998-04-22

arxiv.org/abs/cond-mat/9804236v2

Physics

Condensed Matter

Statistical Mechanics

A slightly revised version of the original is given here which is now published in Eur. Phys. J. B 9, 719-724 (1999)

Scientific paper

10.1007/s100510050816

We show how the interface curvature autocorrelation function (ICAF) and associated structure factor (ICSF), of relevance in non-equilibrium pattern-formation problems where sharp interfaces are present, provide new and interesting information on domain structure, as yet not visible via the order-parameter structure factor (OPSF). This is done by discussing numerical simulations of model A (non-conserved relaxational phase-ordering kinetics) in two-dimensional systems. The ICAF is Gaussian over short distances and exhibits dynamical scaling and $t^{1/2}$ power-law growth. We use it to show what the typical length-scale in the model A dynamics corresponds to physically and how it can be obtained uniquely, rather than simply within a multiplicative constant. Experimental methods to measure the ICAF and/or ICSF are still needed at this point.

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