Spin-orbit driven superconducting proximity effects in Pt/Nb thin films.

Spin-orbit driven superconducting proximity effects in Pt/Nb thin films.
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DOI:
10.1038/s41467-023-40757-1
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发表时间:
2023-08-21
影响因子:
16.6
通讯作者:
Lee, Stephen
Lee, Stephen
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Flokstra, Machiel;Stewart, Rhea;Yim, Chi-Ming;Trainer, Christopher;Wahl, Peter;Miller, David;Satchell, Nathan;Burnell, Gavin;Luetkens, Hubertus;Prokscha, Thomas;Suter, Andreas;Morenzoni, Elvezio;Bobkova, Irina V.;Bobkov, Alexander M.;Lee, Stephen

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Manipulating the spin state of thin layers of superconducting material is a promising route to generate dissipationless spin currents in spintronic devices. Approaches typically focus on using thin ferromagnetic elements to perturb the spin state of the superconducting condensate to create spin-triplet correlations. We have investigated simple structures that generate spin-triplet correlations without using ferromagnetic elements. Scanning tunneling spectroscopy and muon-spin rotation are used to probe the local electronic and magnetic properties of our hybrid structures, demonstrating a paramagnetic contribution to the magnetization that partially cancels the Meissner screening. This spin-orbit generated magnetization is shown to derive from the spin of the equal-spin pairs rather than from their orbital motion and is an important development in the field of superconducting spintronics. The authors study a Pt/Nb hybrid structure by scanning microscopy and muon spin rotation. They find an anomalous absence of Meissner screening near the Pt/Nb interface due to spin-triplet pair correlations driven by spin-orbit coupling alone with no ferromagnetic layer necessary.
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