Josephson coupling between a disk of one superconductor and a surrounding superconducting film of different symmetry

A. J. Millis

doi:10.1103/PhysRevB.49.15408

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Josephson coupling between a disk of one superconductor and a surrounding superconducting film of different symmetry

A. J. Millis

DOI 10.1103/PhysRevB.49.15408 · Physical Review B

T1

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Abstract

A cylindrical Josephson junction with a spatially dependent Josephson coupling averaging to zero over the length of the junction is studied as a model for the physics of a disk of a d-wave superconductor embedded in a superconducting film of a different symmetry. It is found that the system always introduces Josephson vortices in order to gain energy at the junction. The critical current is calculated. It is argued that a recent experiment that was claimed to provide evidence for s-wave superconductivity in YBa2Cu3O7 may also be consistent with d-wave superconductivity.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown