Bercioux, DarioFrustaglia, Diego CésarDe Martino, Alessandro2023-10-172023-10-172023-09-20Bercioux, D., Frustaglia, D.C. y De Martino, A. (2023). Chiral spin channels in curved graphene pn junctions. Physical Review B, 108 (115140). https://doi.org/10.1103/PhysRevB.108.115140.2469-99502469-9969https://hdl.handle.net/11441/149708We 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.application/pdf7 p.engAttribution-NonCommercial-NoDerivatives 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc-nd/4.0/Chiral modesCircular graphene pn junctionsSemiconductor platformsinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/openAccesshttps://doi.org/10.1103/PhysRevB.108.115140