Interaction of Josephson junction and distant vortex in narrow thin-film superconducting strips

V. G. Kogan; R. G. Mints

doi:10.1103/PhysRevB.89.014516

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Interaction of Josephson junction and distant vortex in narrow thin-film superconducting strips

V. G. Kogan, R. G. Mints

DOI 10.1103/PhysRevB.89.014516 · Physical Review B

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Abstract

The phase difference between the banks of an edge-type planar Josephson junction crossing the narrow thin-film strip depends on wether or not vortices are present in the junction banks. For a vortex close to the junction this effect has been seen by Golod, Rydh, and Krasnov [Phys. Rev. Lett. 104, 227003 (2010)], who showed that the vortex may turn the junction into π type. It is shown here that even if the vortex is far away from the junction, it still changes the 0 junction to a π junction when situated close to the strip edges. Within the approximation used, the effect is independent of the vortex-junction separation, a manifestation of the topology of the vortex phase which extends to macroscopic distances of superconducting coherence.