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arXiv · 1412.0998

Mesoscopic Josephson junctions with switchable current-phase relation

E. Strambini·F. S. Bergeret·F. Giazotto
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Abstract

We propose and analyze a mesoscopic Josephson junction consisting of two ferromagnetic insulator-superconductors (FI-Ss) coupled through a normal metal (N) layer. The Josephson current of the junction is non-trivially affected by the spin-splitting field induced by the FIs in the two superconductors. In particular, it shows sizeable enhancement by increasing the amplitude of the exchange field ($h_{ex}$) and displays a switchable current-phase relation which depends on the relative orientation of $h_{ex}$ in the FIs. In a realistic EuS/Al-based setup this junction can be exploited as a high-resolution threshold sensor for the magnetic field as well as an on-demand tunable kinetic inductor.

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E. Strambini, F. S. Bergeret, F. Giazotto. 2014-12-02. Mesoscopic Josephson junctions with switchable current-phase relation. https://doi.org/10.1209/0295-5075%2F112%2F17013

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