Anomalous Josephson Effect in S-wave Superconductor Junctions

Abstract

[evdate 2012-12-18] IAS Symposium on Frontiers in Condensed Matter Physics. Talk no.8 Title from title slide.

Abstract: In usual Josephson junctions, the supercurrent is zero, when the two superconducting leads have zero phase difference. However, non-zero supercurrent exists in some junctions even when the superconducting leads have zero phase difference, and this effect is referred to as the anomalous Josephson effect. There were three theoretical studies reported in Physical Review Letters on this effect in s-wave Josephson junctions, which do not agree with each other on the necessary conditions for the existence of the anomalous effect. In this talk, the speaker will present him study of the existence conditions from the symmetry point of view. Also present the study of the anomalous supercurrent in a ferromagnetic trilayer Josephson junction, which is found to be the result of the triplet pairing created by spin rotation in the ferromagnetic layers and scattering by the interfaces.

Duration: 29 min.