Anisotropic profiles in the spin polarization of multichannel semiconductor rings with Rashba spin orbit coupling

TL;DR

This paper studies how eccentricity in semiconductor rings with Rashba spin-orbit coupling causes anisotropic spin polarization patterns, which could be used for spin manipulation in nanodevices.

Contribution

It introduces the effect of eccentricity on spin polarization in multichannel rings with Rashba coupling, revealing anisotropic patterns and potential for spin control.

Findings

Eccentricity induces anisotropic spin polarization patterns.

Spin polarization varies with angular direction due to eccentricity.

Potential application in manipulating spin in nanorings.

Abstract

We investigate the spin accumulation effect in eccentric semiconductor multichannel rings with Rashba spin-orbit interaction and threaded by a magnetic flux. Due to the finite eccentricity, the spin polarization induced at the borders of the sample is anisotropic and exhibits different patterns and intensities at specific angular directions. This effect, reminiscent of the spin polarization drift induced by the application of an in plane electric field, could be used to manipulate and functionalize the spin polarization in electronic nanorings.