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arXiv · 2312.06774

Non-constant geometric curvature for tailored spin-orbit coupling and chirality in superconductor-magnet heterostructures

Alv Johan Skarpeid·Henning G. Hugdal·Tancredi Salamone·Morten Amundsen·Sol H. Jacobsen
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Abstract

We show that tailoring the geometric curvature profile of magnets can be used for bespoke design of an effective non-relativistic spin-orbit coupling, which may be used to control proximity effects if the magnet is coupled to a superconductor. We consider proximity-coupled one-dimensional magnetic wires with variable curvatures, specifically three distinct shapes classified as J-, C-, and S-type. We demonstrate a chirality-dependent spin polarization of the superconducting correlations, and show the role of curvature in determining the ground state of mixed-chirality junctions. We speculate on how this may be implemented in novel device design, and include analysis of its usage in a spin-triplet SQUID

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Alv Johan Skarpeid, Henning G. Hugdal, Tancredi Salamone, Morten Amundsen, Sol H. Jacobsen. 2023-12-11. Non-constant geometric curvature for tailored spin-orbit coupling and chirality in superconductor-magnet heterostructures. https://doi.org/10.1088/1361-648x%2Fad2e23

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