Driven depinning in anisotropic media

Tang, Lei-Han ; Kardar, Mehran ; Dhar, Deepak (1995) Driven depinning in anisotropic media Physical Review Letters, 74 (6). pp. 920-923. ISSN 0031-9007

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We show that the critical behavior of a driven interface, depinned from quenched random impurities, depends on the isotropy of the medium. In anisotropic media the interface is pinned by a bounding (conducting) surface characteristic of a model of mixed diodes and resistors. Different universality classes describe depinning along a hard and a generic direction. The exponents in the latter (tilted) case are highly anisotropic, and obtained exactly by a mapping to growing surfaces. Various scaling relations are proposed in the former case which explain a number of recent numerical observations.

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Source:Copyright of this article belongs to American Physical Society.
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Deposited On:02 Nov 2010 12:22
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