Anisotropic Interface Depinning - Numerical Results

Details Anisotropic Interface Depinning - Numerical Results Anisotropic Interface Depinning - Numerical Results

1996-05-03

arxiv.org/abs/cond-mat/9605018v1

Physics

Condensed Matter

9 pages, 13 figures, REVTeX

Scientific paper

10.1103/PhysRevE.54.1313

We study numerically a stochastic differential equation describing an interface driven along the hard direction of an anisotropic random medium. The interface is subject to a homogeneous driving force, random pinning forces and the surface tension. In addition, a nonlinear term due to the anisotropy of the medium is included. The critical exponents characterizing the depinning transition are determined numerically for a one-dimensional interface. The results are the same, within errors, as those of the ``Directed Percolation Depinning'' (DPD) model. We therefore expect that the critical exponents of the stochastic differential equation are exactly given by the exponents obtained by a mapping of the DPD model to directed percolation. We find that a moving interface near the depinning transition is not self-affine and shows a behavior similar to the DPD model.

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