Magnetic interference pattern in planar SNS Josephson junctions

Details Magnetic interference pattern in planar SNS Josephson junctions Magnetic interference pattern in planar SNS Josephson junctions

2007-12-18

arxiv.org/abs/0712.2967v1

Phys. Rev. B 77, 014520 (2008)

Physics

Condensed Matter

Superconductivity

6 pages, 4 figures, Accepted by Phys. Rev. B

Scientific paper

10.1103/PhysRevB.77.014520

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 $I_c(\Phi)$ with the magnetic flux $\Phi$ are significantly different from an ordinary magnetic interference pattern. Depending on the ratio $L/D$ and temperature, $I_c(\Phi)$-oscillations can have a period smaller than flux quantum $\Phi_0$, nonzero minima and damping rate much smaller than $1/\Phi$. Similar anomalous magnetic interference pattern was recently observed experimentally.

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