Ferromagnetic planar Josephson junction with transparent interfaces: a {\phi} junction proposal

TL;DR

This paper proposes a new design for a ferromagnetic planar Josephson junction with transparent interfaces, demonstrating its potential as an experimental {} junction with favorable current-phase relations.

Contribution

It introduces a theoretical model for a ferromagnetic Josephson junction with transparent interfaces, highlighting its suitability for realizing {} junctions experimentally.

Findings

The junction exhibits a unique current-phase relation.

Transparent interfaces enhance superconducting correlations.

The design is promising for experimental {} junctions.

Abstract

We calculate the current phase relation of a planar Josephson junction with a ferromagnetic weak link located on top of a thin normal metal film. Following experimental observations we assume transparent superconductor-ferromagnet interfaces. This provides the best interlayer coupling and a low suppression of the superconducting correlations penetrating from the superconducting electrodes into the ferromagnetic layer. We show that this Josephson junction is a promising candidate for an experimental {\phi} junction realization.