Magnetic switching of spin-scattering centers in Dresselhaus [110] circuits

TL;DR

This paper demonstrates how in-plane Zeeman fields activate spin phases in Dresselhaus [110] circuits, revealing complex interference patterns and the role of disorder in low-field spin control.

Contribution

It introduces a method to activate Dresselhaus [110] spin phases using in-plane Zeeman fields and analyzes the resulting interference patterns and disorder effects.

Findings

Spin phases can be activated in D110 circuits with in-plane Zeeman fields.

Rich interference patterns map the propagating spin states.

Disorder facilitates low-field spin control.

Abstract

Spin carriers subject to Dresselhaus [110] (D110) spin-orbit coupling (SOC) gather null spin phases in closed circuits, contrary to usual Rashba and Dresselhaus [001] SOC. We show that D110 spin phases can be activated in square circuits by introducing an in-plane Zeeman field, where localized field inhomogeneities act as effective spin-scattering centers. Our simulations show rich interference patterns in the quantum conductance, which work as maps for a geometric classification of the propagating spin states. We also find that disorder facilitates low-field implementations.