Spin-dependent quantum transport in periodic magnetic modulations: Aharonov-Bohm ring structure as a spin filter

TL;DR

This paper proposes a scheme for a spin filter using quantum interference in an Aharonov-Bohm ring with magnetic modulation, enabling large spin-polarized currents across multiple energy channels.

Contribution

It introduces a novel method for spin filtering based on magnetic modulation in AB rings, enhancing control over spin transport at the mesoscopic scale.

Findings

Large spin-polarized current achievable

Multiple energy channels utilized

Quantum interference enables spin control

Abstract

Quantum interference in Aharonov-Bohm (AB) ring structure provides additional control of spin at mesoscopic scale. We propose a scheme for spin filter by studying the coherent transport through the AB structure with lateral magnetic modulation on both arms of the ring structure. Large spin polarized current can be obtained with many energy channels.