Disorder in two-dimensional Josephson junctions

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Abstract

An effective free energy of a two-dimensional (i.e., large area) Josephson junction is derived, allowing for thermal fluctuations, random magnetic fields, and external currents. We show by using replica-symmetry-breaking methods that the junction has four distinct phases: disordered, Josephson ordered, a glass phase, and a coexisting Josephson order with the glass phase. Near the coexistence to glass transition at s= the critical current is ∼(area(Formula presented) where s is a measure of disorder. Our results may account for junction ordering at temperatures well below the critical temperature of the bulk in high-(Formula presented) trilayer junctions.

Original languageEnglish
Pages (from-to)14499-14512
Number of pages14
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume55
Issue number21
DOIs
StatePublished - 1 Jan 1997

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