Energy Landscapes in Random Systems, Driven Interfaces, and Wetting

Phys. Rev. Lett. 84, 3982 – Published 24 April 2000
E. T. Seppälä and M. J. Alava

Abstract

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 hL-5/3 and L-2.2 for (1+1) and (2+1) dimensional manifolds with random bond disorder.

DOI: http://dx.doi.org/10.1103/PhysRevLett.84.3982

  • Received 11 August 1999
  • Published in the issue dated 24 April 2000

© 2000 The American Physical Society

Authors & Affiliations

E. T. Seppälä and M. J. Alava

  • Helsinki University of Technology, Laboratory of Physics, P.O. Box 1100, FIN-02015 HUT, Finland

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