Josephson current in unconventional superconductors through an Anderson impurity

Y. Avishai; A. Golub

doi:10.1103/PhysRevB.61.11293

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Josephson current in unconventional superconductors through an Anderson impurity

Y. Avishai, A. Golub

DOI 10.1103/PhysRevB.61.11293 · Physical Review B

T1

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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 π junction into a 0 junction. This effect is more pronounced in p-wave superconductors while in high-temperature superconductors with dx2−y2 symmetry it can exist for rather large artificial centers at which tunneling occurs within a finite region.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Sr2RuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown