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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arXiv · 1311.7154

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

V. G. Kogan·R. G. Mints

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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, \prl {\bf 104}, 227003 (2010), who showed that the vortex may turn the junction into $\pi$-type. It is shown here that even if the vortex is far away from the junction, it still changes the 0-junction to $\pi$-junction when situated close to the strip edges. Within the approximation used, the latter effect is independent of the vortex-junction separation, a manifestation of topology of the vortex phase which extends to macroscopic distances of superconducting coherence.

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V. G. Kogan, R. G. Mints. 2013-11-27. Interaction of Josephson junction and distant vortex in narrow thin-film superconducting strips. https://doi.org/10.1103/physrevb.89.014516

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