Quantum splitter controlled by Rashba spin-orbit interaction

TL;DR

This paper introduces a mesoscopic device leveraging Rashba spin-orbit interaction to control electron flux and spin polarization, functioning as a quantum splitter and spin filter, with potential applications in spintronics.

Contribution

The paper presents a novel device design that uses gate-controlled Rashba SOI in an Aharonov-Bohm ring to manipulate electron flow and spin states.

Findings

Rashba coupling variations redistribute carrier flux.

Device enables spin filtering.

Controlled spin polarization of outgoing currents.

Abstract

We propose the mesoscopic device based on the Rashba spin orbit interaction (SOI) that contains a gated ballistic Aharonov-Bohm (AB) ring with incoming lead and two asymmetrically situated outgoing leads. The variations of the Rashba coupling parameter induced by the gate voltage applied to the AB ring is shown to cause the redistribution of the carrier flux between the outgoing leads and spin polarization of the outgoing currents, thus allowing the system to manifest the properties of the quantum splitter and spin filter.