Volume 112, Number 1, October 2015
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||23 October 2015|
Mesoscopic Josephson junctions with switchable current-phase relation
1 NEST Istituto Nanoscienze-CNR and Scuola Normale Superiore - I-56127 Pisa, Italy
2 Centro de Física de Materiales (CFM-MPC), Centro Mixto CSIC-UPV/EHU - Manuel de Lardizabal 4, E-20018 San Sebastián, Spain
3 Donostia International Physics Center (DIPC) - Manuel de Lardizabal 5, E-20018 San Sebastián, Spain
4 Institut für Physik, Carl von Ossietzky Universität - D-26111 Oldenburg, Germany
Received: 25 August 2015
Accepted: 2 October 2015
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 and displays a switchable current-phase relation which depends on the relative orientation of hex 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.
PACS: 74.78.Na – Mesoscopic and nanoscale systems / 73.23.-b – Electronic transport in mesoscopic systems / 73.63.-b – Electronic transport in nanoscale materials and structures
© EPLA, 2015
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