Realization of 0 - $\pi$ states in SFIS Josephson junctions. The role of spin-orbit interaction and lattice impurities

• URL: http://arxiv.org/abs/2108.04292v2
• Date: Thu, 14 Oct 2021 16:12:18 GMT
• Title: Realization of 0 - $\pi$ states in SFIS Josephson junctions. The role of spin-orbit interaction and lattice impurities
• Authors: Martina Minutillo, Roberto Capecelatro, Procolo Lucignano
• Abstract summary: Josephson devices with ferromagnetic barriers have been widely studied. Much less is known when the ferromagnetic layer is insulating. We investigate the transport properties of superconductor-ferromagnetic-superconductor junctions.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Josephson devices with ferromagnetic barriers have been widely studied. Much less is known when the ferromagnetic layer is insulating. In this manuscript we investigate the transport properties of superconductor-ferromagnetic insulator-superconductor (SFIS) junctions with particular attention to the temperature behavior of the critical current, that may be used as a fingerprint of the junction. We investigate the specific role of impurities as well as of possible spin mixing mechanisms, due to the spin orbit coupling. Transition between the 0 and the $\pi$ phases can be properly tuned, thus achieving stable $\pi$ junctions over the whole temperature range, that may be possibly employed in superconducting quantum circuits.

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