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

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 w...

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Bibliographic Details
Published in:Journal of physics. Condensed matter 2024-06, Vol.36 (23), p.235302
Main Authors: Johan Skarpeid, Alv, Hugdal, Henning G, Salamone, Tancredi, Amundsen, Morten, Jacobsen, Sol H
Format: Article
Language:English
Subjects:
chirality
curvilinear magnetism
Josephson junctions
proximity effect
spin-orbit coupling
spintronics
superconductivity
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Summary: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.
ISSN:0953-8984
1361-648X
1361-648X
DOI:10.1088/1361-648X/ad2e23