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On the Josephson Coupling between a disk of one superconductor and a surrounding superconducting film of a different symmetry

A. J. Millis
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Abstract

A cylindrical Josephson junction with a spatially dependent Josephson coupling which averages to zero is studied in order to model the physics of a disk of d-wave superconductor embedded in a superconducting film of a different symmetry. It is found that the system always introduces Josepshon vortices in order to gain energy at the junction. The critical current is calculated. It is argued that a recent experiment claimed to provide evidence for s-wave superconductivity in $YBa_2Cu_3O_7$ may also be consistent with d-wave superconductivity. Figures available from the author on request.

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A. J. Millis. 1994-03-29. On the Josephson Coupling between a disk of one superconductor and a surrounding superconducting film of a different symmetry. https://doi.org/10.1103/physrevb.49.15408

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