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arXiv · 0712.2967

Magnetic interference pattern in planar SNS Josephson junctions

G. Mohammadkhani·M. Zareyan·Ya. M. Blanter
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Abstract

We study the Josephson current through a ballistic normal metal layer of thickness $D$ on which two superconducting electrodes are deposited within a distance $L$ of each other. In the presence of an ({\it in-layer}) magnetic field we find that the oscillations of the critical current $I_c(Φ)$ with the magnetic flux $Φ$ are significantly different from an ordinary magnetic interference pattern. Depending on the ratio $L/D$ and temperature, $I_c(Φ)$-oscillations can have a period smaller than flux quantum $Φ_0$, nonzero minima and damping rate much smaller than $1/Φ$. Similar anomalous magnetic interference pattern was recently observed experimentally.

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G. Mohammadkhani, M. Zareyan, Ya. M. Blanter. 2007-12-18. Magnetic interference pattern in planar SNS Josephson junctions. https://doi.org/10.1103/physrevb.77.014520

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