Energy landscapes in random systems, driven interfaces, and wetting

We discuss the zero-temperature susceptibility of elastic manifolds with quenched randomness. It diverges with system size due to low-lying local minima. The distribution of energy gaps is deduced to be constant in the limit of vanishing gaps by comparing numerics with a probabilistic argument. The...

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Bibliographic Details
Published in:Physical review letters 2000-04, Vol.84 (17), p.3982-3985
Main Authors: Seppala, ET, Alava, MJ
Format: Article
Language:English
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Summary:We discuss the zero-temperature susceptibility of elastic manifolds with quenched randomness. It diverges with system size due to low-lying local minima. The distribution of energy gaps is deduced to be constant in the limit of vanishing gaps by comparing numerics with a probabilistic argument. The typical manifold response arises from a level-crossing phenomenon and implies that wetting in random systems begins with a discrete transition. The associated "jump field" scales as approximately L-5/3 and L-2.2 for (1+1) and (2+1) dimensional manifolds with random bond disorder.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.84.3982