Persistent spin helix on a wurtzite ZnO(10-10) surface: First-principles density-functional study

TL;DR

This study reveals the first observation of persistent spin helix (PSH) on a wurtzite ZnO surface using first-principles calculations, showing potential for spintronics due to its unique spin textures and shorter wavelength.

Contribution

First-principles density-functional study demonstrating PSH on wurtzite ZnO surface, expanding the understanding beyond zinc-blende structures.

Findings

PSH observed on wurtzite ZnO(10-10) surface

Quasi-one dimensional spin textures identified

Wavelength smaller than zinc-blende quantum wells

Abstract

The persistent spin helix (PSH) that has been widely and exclusively studied in zinc-blende structures is revealed for the first time on the surface of a wurtzite structure. Through first-principles calculations of the ZnO(10-10) surface, a quasi-one dimensional orientation of the spin textures is identified. Further, the wavelength of this particular PSH is smaller than that observed with various zinc-blende quantum well structures, thus indicating that wurtzite-structured surfaces are suitable for spintronics applications.