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Condensed Matter > Mesoscale and Nanoscale Physics
Title: Chiral spin channels in curved graphene $pn$ junctions
(Submitted on 10 Mar 2023 (v1), last revised 27 Sep 2023 (this version, v2))
Abstract: 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.
Submission history
From: Alessandro De Martino [view email][v1] Fri, 10 Mar 2023 10:19:28 GMT (8590kb,D)
[v2] Wed, 27 Sep 2023 11:21:23 GMT (13553kb,D)
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