Decoupling transition of flux lattices in pure layered superconductors

Ruth Goldin, Baruch Horovitz

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Abstract

We study the decoupling transition of flux lattices in layered superconductors at which the Josephson coupling J is renormalized to zero. We identify the order parameter and related correlations; the latter are shown to decay as a power law in the decoupled phase. Within the second-order renormalization group we find that the transition is always continuous, in contrast with results of the self-consistent harmonic approximation. The critical temperature for weak J is ∼1/B, where B is the magnetic field, while for strong J it is ∼1/B and is strongly enhanced. We show that renormaliztion group can be used to evaluate the Josephson plasma frequency and find that for weak J it is ∼1/B T2 in the decoupled phase.

Original languageEnglish
Article number024518
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume72
Issue number2
DOIs
StatePublished - 1 Jul 2005

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