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Chiral spin channels in curved graphene pn junctions

Bercioux, D., Frustaglia, D. & De Martino, A. ORCID: 0000-0002-3656-0419 (2023). Chiral spin channels in curved graphene pn junctions. Physical Review B, 108(11), article number 115140. doi: 10.1103/physrevb.108.115140


We show that the chiral modes in circular graphene pn junctions provide an advantage for spin manipulation via spin-orbit coupling compared to semiconductor platforms. We derive the effective Hamiltonian for the spin dynamics of the junction's zero modes and calculate their quantum phases. We find a sweet spot in parameter space where the spin is fully in-plane and radially polarized for a given junction polarity. This represents a shortcut to singular spin configurations that would otherwise require spin-orbit coupling strengths beyond experimental reach.

Publication Type: Article
Subjects: Q Science > QA Mathematics
Q Science > QC Physics
Departments: School of Science & Technology > Mathematics
SWORD Depositor:
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