Excitation of spin waves on a cylindrical semiconductor heterostructure with Rashba spin-orbit interaction

TL;DR

This paper theoretically investigates spin wave excitations in a cylindrical semiconductor heterostructure with Rashba spin-orbit interaction, revealing sharp resonances in current response due to spin remagnetization waves.

Contribution

It introduces a theoretical model for spin wave excitations on a cylindrical surface with Rashba interaction, predicting resonant behavior in current response.

Findings

Sharp resonances predicted in steady-state current response

Resonances caused by weakly damped spin remagnetization waves

Optical excitation of eigenmodes via interference pattern

Abstract

Elementary excitations in a paramagnetic semiconductor quantum well confined to a cylindrical surface are theoretically studied on the basis of coupled spin-charge drift-diffusion equations. The electric-field-mediated eigenmodes are optically excited by an oscillating interference pattern, which induces a current in the outer circuit. For a cylinder with a given radius, sharp resonances are predicted to occur in the steady-state current response, which are due to weakly damped spin remagnetization waves.