Josephson Current in S-FIF-S Junctions: Nonmonotonic Dependence on Misorientation Angle

TL;DR

This paper investigates how the Josephson current in S-FIF-S junctions varies with the misorientation angle of ferromagnetic layers, revealing a nonmonotonic relationship influenced by the pi-state configuration.

Contribution

It introduces a detailed analysis of the spectra and spin structures of Andreev states considering finite transparency and misorientation angles in S-FIF-S junctions, highlighting nonmonotonic Josephson current behavior.

Findings

Josephson current shows nonmonotonic dependence on misorientation angle.

Nonmonotonic behavior occurs when the pi-state is the equilibrium state.

The study emphasizes the role of finite transparency and spin structures.

Abstract

Spectra and spin structures of Andreev interface states in S-FIF-S junctions are investigated with emphasis on finite transparency and misorientation angle between in-plane magnetizations of ferromagnetic layers in a three-layer interface. It is demonstrated that the Josephson current in S-FIF-S quantum point contacts can exhibit a nonmonotonic dependence on the misorientation angle. The characteristic behavior takes place, if the pi-state is the equilibrium state of the junction in the particular case of parallel magnetizations.