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

Machiel Flokstra, Rhea Stewart, Chi-Ming Yim, Christopher Trainer, Peter Wahl, David Miller, Nathan Satchell, Gavin Burnell, Hubertus Luetkens, Thomas Prokscha, Andreas Suter, Elvezio Morenzoni, Irina V. Bobkova, Alexander M. Bobkov and Stephen Lee ()
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Machiel Flokstra: University of St. Andrews
Rhea Stewart: University of St. Andrews
Chi-Ming Yim: University of St. Andrews
Christopher Trainer: University of St. Andrews
Peter Wahl: University of St. Andrews
David Miller: University of St. Andrews
Nathan Satchell: University of Leeds
Gavin Burnell: University of Leeds
Hubertus Luetkens: Paul Scherrer Institut
Thomas Prokscha: Paul Scherrer Institut
Andreas Suter: Paul Scherrer Institut
Elvezio Morenzoni: Paul Scherrer Institut
Irina V. Bobkova: Institute of Solid State Physics
Alexander M. Bobkov: Institute of Solid State Physics
Stephen Lee: University of St. Andrews

Nature Communications, 2023, vol. 14, issue 1, 1-5

Abstract: Abstract 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.

Date: 2023
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DOI: 10.1038/s41467-023-40757-1

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