Nonsinusoidal current-phase relation in strongly ferromagnetic and moderately disordered SFS junctions

sin ( 2 φ ) current - phase relation in SFS junctions with deco - herence in the ferromagnet

Josephson junctions with tunable current-phase relation

A. Lipman,1 R. G. Mints,1 R. Kleiner,2 D. Koelle,2 and E. Goldobin2,* 1The Raymond and Beverly Sackler School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel 2Physikalisches Institut and Center for Collective Quantum Phenomena in LISA+, Universität Tübingen, Auf der Morgenstelle 14, D-72076 Tübingen, Germany (Received 29 September 2014; revised manuscript received 22 Octob...

Mesoscopic Josephson junctions with switchable current-phase relation

E. Strambini, a) F. S. Bergeret, 3, 4, b) and F. Giazotto c) NEST Istituto Nanoscienze-CNR and Scuola Normale Superiore, I-56127 Pisa, Italy Centro de F́ısica de Materiales (CFM-MPC), Centro Mixto CSIC-UPV/EHU, Manuel de Lardizabal 4, E-20018 San Sebastián, Spain Donostia International Physics Center (DIPC), Manuel de Lardizabal 5, E-20018 San Sebastián, Spain Institut für Physik, Carl von Ossie...

Current-Phase Relation of Ballistic Graphene Josephson Junctions

The current-phase relation (CPR) of a Josephson junction (JJ) determines how the supercurrent evolves with the superconducting phase difference across the junction. Knowledge of the CPR is essential in order to understand the response of a JJ to various external parameters. Despite the rising interest in ultraclean encapsulated graphene JJs, the CPR of such junctions remains unknown. Here, we u...

Critical current oscillations in strong ferromagnetic pi junctions.

We report magnetic and electrical measurements of Nb Josephson junctions with strongly ferromagnetic barriers of Co, Ni, and Ni80Fe20 (Py). All these materials show multiple oscillations of critical current with a barrier thickness implying repeated 0-pi phase transitions in the superconducting order parameter. We show, in particular, that the Co barrier devices can be accurately modeled using ...