Spin-dependent transport in lateral periodic magnetic modulations: a novel scheme for spin filters

TL;DR

This paper proposes a new spin filter scheme using weak lateral magnetic modulations in quantum wires, predicting large spin polarization and robustness, offering a potentially practical approach for spintronic devices.

Contribution

It introduces a novel spin filter design with weak magnetic modulations, differing from existing methods, and demonstrates its effectiveness and robustness.

Findings

Large spin polarization predicted

Robustness of the spin filter confirmed

Potential for practical spintronic applications

Abstract

A novel scheme for spin filters is proposed by studying the coherent transport of electrons through the quantum wires with lateral magnetic modulations. Unlike other schemes in the literature, the modulation in our scheme is much weaker than the Fermi level. Large spin polarization through the filter is predicted. Further study suggests the robustness of this new spin filter.