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Disorder Induced Transitions in Layered Coulomb Gases and Superconductors

Baruch Horovitz, Pierre Le Doussal

DOI 10.1103/PhysRevLett.84.5395 · Physical Review Letters

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Abstract

A 3D layered system of charges with logarithmic interaction parallel to the layers and random dipoles is studied via a novel variational method and an energy rationale which reproduces the known phase diagram for a single layer. Increasing interlayer coupling leads to successive transitions in which charge rods correlated in N>1 neighboring layers are nucleated by weaker disorder. For layered superconductors in the limit of only magnetic interlayer coupling, the method predicts and locates a disorder induced defect-unbinding transition in the flux lattice. While N=1 charges dominate there, N>1 disorder induced defect rods are predicted for multilayer superconductors.

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