Josephson current in unconventional superconductors through an Anderson impurity

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Abstract

Josephson current for a system consisting of an Anderson impurity weakly coupled to two unconventional superconductors is studied and shown to be driven by a surface zero energy (midgap) bound state. The repulsive Coulomb interaction in the dot can turn a (Formula presented) junction into a 0 junction. This effect is more pronounced in p-wave superconductors while in high-temperature superconductors with (Formula presented) symmetry it can exist for rather large artificial centers at which tunneling occurs within a finite region.

Original languageEnglish
Pages (from-to)11293-11296
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume61
Issue number17
DOIs
StatePublished - 1 Jan 2000

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