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Condensed Matter > Superconductivity
Title: Skyrmion Control of Majorana States in Planar Josephson Junctions
(Submitted on 25 Dec 2020 (v1), last revised 15 Jul 2021 (this version, v2))
Abstract: Planar Josephson junctions provide a versatile platform, alternative to the nanowire-based geometry, for the generation of the Majorana bound states, due to the additional phase tunability of the topological superconductivity. The proximity induction of chiral magnetism and superconductivity in a two-dimensional electron gas showed remarkable promises to manipulate topological superconductivity. Here, we consider a Josephson junction involving a skyrmion crystal and show that the chiral magnetism of the skyrmions can create and control the Majorana bound states without the requirement of an intrinsic Rashba spin-orbit coupling. Interestingly, the Majorana bound states in our geometry are realized robustly at zero phase difference at the junction. The skyrmion radius, being externally tunable by a magnetic field or a magnetic anisotropy, brings a unique control feature for the Majorana bound states.
Submission history
From: Narayan Mohanta [view email][v1] Fri, 25 Dec 2020 03:20:42 GMT (8789kb,D)
[v2] Thu, 15 Jul 2021 19:56:51 GMT (23296kb,D)
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