Magnetic-non-magnetic superlattice chain with external electric field: Spin transport and the selective switching effect

TL;DR

This paper predicts multiple mobility edges and potential metal-insulator transitions in a one-dimensional magnetic-non-magnetic superlattice under an external electric field, highlighting its use as a spin filter.

Contribution

It introduces a novel model predicting multiple mobility edges and electric field effects in magnetic superlattices, with implications for spin filtering applications.

Findings

Multiple mobility edges exist in the superlattice.

Electric field induces metal-insulator transitions at various energies.

The system can function as an effective spin filter.

Abstract

Based on Green's function formalism, the existence of multiple mobility edges in a one-dimensional magnetic-non-magnetic superlattice geometry in presence of external electric field is predicted, and, it leads to the possibility of getting a metal-insulator transition at multiple values of Fermi energy. The role of electric field on electron localization is discussed for different arrangements of magnetic and non-magnetic atomic sites in the chain. We also analyze that the model quantum system can be used as a perfect spin filter for a wide range of energy.