Skyrmion Control of Majorana States in Planar Josephson Junctions

Narayan Mohanta; Satoshi Okamoto; Elbio Dagotto

doi:10.1038/s42005-021-00666-5

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arXiv · 2012.13502

Skyrmion Control of Majorana States in Planar Josephson Junctions

Narayan Mohanta·Satoshi Okamoto·Elbio Dagotto

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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.

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Narayan Mohanta, Satoshi Okamoto, Elbio Dagotto. 2020-12-25. Skyrmion Control of Majorana States in Planar Josephson Junctions. https://doi.org/10.1038/s42005-021-00666-5

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