The Pinning Paths of an Elastic Interface

Details The Pinning Paths of an Elastic Interface The Pinning Paths of an Elastic Interface

1996-08-07

arxiv.org/abs/cond-mat/9608033v1

Physics

Condensed Matter

Revtex, 4 pages, 3 figures

Scientific paper

We introduce a model describing the paths that pin an elastic interface moving in a disordered medium. We find that the scaling properties of these ``elastic pinning paths'' (EPP) are different from paths embedded on a directed percolation cluster, which are known to pin the interface of the ``directed percolation depinning'' class of surface growth models. The EPP are characterized by a roughness exponent $\alpha=1.25$, intermediate between that of the free inertial process ($\alpha=3/2$) and the diode-resistor problem on a Cayley tree ($\alpha=1$). We also calculate numerically the mean cluster size and the cluster size distribution for the EPP.

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