Curvature-induced long ranged supercurrents in diffusive SFS Josephson Junctions, with dynamic $0-\pi$ transition

TL;DR

This paper demonstrates that geometric curvature in diffusive SFS Josephson junctions can induce long-range spin supercurrents and enable a tunable $0- ext{pi}$ transition without magnetic misalignment or spin-orbit coupling.

Contribution

It introduces a novel mechanism where curvature alone generates spin triplet supercurrents and dynamic $0- ext{pi}$ transitions in Josephson junctions, expanding understanding of supercurrent control.

Findings

Curvature induces long-range spin supercurrents in SFS junctions.

Curvature enables a dynamically tunable $0- ext{pi}$ transition.

Spin triplet generation occurs without magnetic misalignment or spin-orbit coupling.

Abstract

We report that spin supercurrents can be induced in diffusive SFS Josephson junctions without any magnetic misalignment or intrinsic spin orbit coupling. Instead, the pathway to spin triplet generation is provided via geometric curvature, and results in a long ranged Josephson effect. In addition, the curvature is shown to induce a dynamically tunable $0-\pi$ transition in the junction. We provide the analytic framework and discuss potential experimental and innovation implications.