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arXiv · 0707.2460

Magnetic Interference Patterns and Vortices in Diffusive SNS junctions

J. C. Cuevas·F. S. Bergeret
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Abstract

We study theoretically the electronic and transport properties of a diffusive superconductor-normal metal-superconductor (SNS) junction in the presence of a perpendicular magnetic field. We show that the field dependence of the critical current crosses over from the well-known Fraunhofer pattern in wide junctions to a monotonous decay when the width of the normal wire is smaller than the magnetic length ξ_H = \sqrt{Φ_0/H}, where H is the magnetic field and Φ_0 the flux quantum. We demonstrate that this behavior is a direct consequence of the magnetic vortex structure appearing in the normal region and predict how such structure is manifested in the local density of states.

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J. C. Cuevas, F. S. Bergeret. 2007-07-17. Magnetic Interference Patterns and Vortices in Diffusive SNS junctions. https://doi.org/10.1103/physrevlett.99.217002

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