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Disorder Induced Transitions in Layered Coulomb Gases and Superconductors

Baruch Horovitz·Pierre Le Doussal
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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 reproduce 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 multi-layer superconductors.

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Baruch Horovitz, Pierre Le Doussal. 2000-02-02. Disorder Induced Transitions in Layered Coulomb Gases and Superconductors. https://doi.org/10.1103/physrevlett.84.5395

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