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

摘要

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