Stationary Josephson effect in a weak-link between nonunitary triplet superconductors

TL;DR

This paper theoretically investigates the stationary Josephson effect in a weak-link between misoriented nonunitary triplet superconductors, revealing spontaneous currents and the influence of misorientation on current-phase relations.

Contribution

It provides an analytical solution to the quasiclassical Eilenberger equations for nonunitary triplet superconductor junctions, highlighting the effects of misorientation on Josephson and spontaneous currents.

Findings

Spontaneous current parallel to the interface was observed.

Current-phase diagrams depend on misorientation angle.

Analytical expressions for the current were derived.

Abstract

A stationary Josephson effect in a weak-link between misorientated nonunitary triplet superconductors is investigated theoretically. The non-self-consistent quasiclassical Eilenberger equation for this system has been solved analytically. As an application of this analytical calculation, the current-phase diagrams are plotted for the junction between two nonunitary bipolar $f-$wave superconducting banks. A spontaneous current parallel to the interface between superconductors has been observed. Also, the effect of misorientation between crystals on the Josephson and spontaneous currents is studied. Such experimental investigations of the current-phase diagrams can be used to test the pairing symmetry in the above-mentioned superconductors.