Giant dynamical Zeeman split in inverse spin valves

TL;DR

This paper proposes an inverse spin valve structure where a ferromagnet is sandwiched between non-magnetic metals, predicting a large dynamical Zeeman splitting of electron chemical potentials under bias, which is experimentally feasible.

Contribution

It introduces the concept of an inverse spin valve and predicts a significant dynamical Zeeman split at metal-ferromagnet interfaces under bias, a novel effect not previously explored.

Findings

Predicted large dynamical Zeeman splitting of electron chemical potentials.

The split is proportional to the applied bias voltage.

Feasibility of generating Zeeman-like splitting on Earth conditions.

Abstract

The inversion of a spin valve device is proposed. Opposite to a conventional spin valve of a non-magnetic spacer sandwiched between two ferromagnetic metals, an inverse spin valve is a ferromagnet sandwiched between two non-magnetic metals. It is predicted that, under a bias, the chemical potentials of spin-up and spin-down electrons in the metals split at metal-ferromagnet interfaces, a dynamical Zeeman effect. This split is of the order of an applied bias. Thus, there should be no problem of generating an $eV$ split that is not possible to be realized on the earth by the usual Zeeman effect.