Manipulating nonequilibrium magnetism through superconductors

TL;DR

This paper explores how superconductors can be used to control and manipulate nonequilibrium magnetism in hybrid superconductor-normal-superconductor systems, revealing novel spin-dependent effects and their compatibility with real materials.

Contribution

It demonstrates the manipulation of nonequilibrium magnetism via superconductors, highlighting unexpected spin-dependent phenomena and analyzing their feasibility with realistic materials.

Findings

Magnetization suppression in the normal conductor

Diamagnetic-like response of susceptibility

Generation of spin-polarized currents

Abstract

Electrostatic control of the magnetization of a normal mesoscopic conductor is analyzed in a hybrid superconductor-normal-superconductor system. This effect stems from the interplay between the non-equilibrium condition in the normal region and the Zeeman splitting of the quasiparticle density of states of the superconductor subjected to a static in-plane magnetic field. Unexpected spin-dependent effects such as magnetization suppression, diamagnetic-like response of the susceptibility as well as spin-polarized current generation are the most remarkable features presented. The impact of scattering events is evaluated and let us show that this effect is compatible with realistic material properties and fabrication techniques.