Quantum spin Hall effect on germanene nanoroad embedded in a completely hydrogenated germanene

TL;DR

This paper demonstrates that germanene nanoroads embedded in fully hydrogenated germanene exhibit quantum spin Hall effect with dissipationless channels, predicted through first-principles calculations, highlighting potential for spintronic applications.

Contribution

It introduces a novel method to realize quantum spin Hall effect in germanene nanoroads embedded in germanane, with detailed predictions of spin textures and conducting channels.

Findings

Germanene nanoroads show quantum spin Hall effect

Dissipationless conducting channels with specific spin textures

Potential for spintronic device applications

Abstract

We show that germanene nanoroads embedded in a completely hydrogenated germanene (germanane) exhibits a quantum spin Hall effect (QSHE). These nanoroads can be obtained experimentally by local hydrogen dissociation from germanane. Using first principle calculations we predict that germanene nanoroads with zigzag interfaces show dissipationless conducting channels with in-plane and out-of-plane spin textures.