Regensburg 2022 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 29: Transport: Poster Session
TT 29.5: Poster
Thursday, September 8, 2022, 15:00–18:00, P1
Curvature control of the superconducting proximity effect in diffusive ferromagnetic nanowires — •Tancredi Salamone1, Henning Hugdal1, Morten Amundsen2, and Sol Jacobsen1 — 1QuSpin Center for Quantum Spintronics, NTNU, Trondheim, Norway — 2Nordita, KTH Royal Institute of Technology, Stockholm, Sweden
There is currently great interest in the inclusion of superconducting components in spintronic devices, because they can provide dissipationless currents, greatly enhancing device performances for spin-based data processing. Coupling a conventional s-wave superconductor to a ferromagnet allows, via the proximity effect, to generate superconducting triplet correlations. The generation of triplet correlations can be employed to achieve a superconducting triplet spin-valve effect in superconductor-ferromagnet (SF) hybrid structures, for example by switching the magnetizations of the ferromagnets between parallel and antiparallel configurations in F1SF2 and SF1F2 trilayers, or in SF bilayers with both Rashba and Dresselhaus spin-orbit coupling. It was recently reported that geometric curvature can control the generation of long ranged triplets [1]. In our most recent work [2], we use this feature to show that the superconducting critical temperature of the hybrid structure can be tuned by varying the curvature of the ferromagnetic wire alone, with no need of another ferromagnet or SOC. Furthermore, we show that the variation of the critical temperature as a function of the curvature can be exploited to obtain a robust, curvature-controlled, superconducting triplet spin-valve effect.
[1] Phys. Rev. B 104, L060505
[2] Phys. Rev. B 105, 134511