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Reviews of topical problems


Superconducting spintronics: state of the art and prospects

†  a, b,  a, ‡  a, b,  c
a Institute for Physics of Microstructures, Russian Academy of Sciences, ul. Ul'yanova 46, Nizhnii Novgorod, 603950, Russian Federation
b Lobachevsky State University of Nizhny Novgorod (National Research University), prosp. Gagarina 23, Nizhny Novgorod, 603950, Russian Federation
c University of Bordeaux, LOMA UMR-CNRS 5798, Talence Cedex, F-33405, France

Significant progress has been achieved recently in a new field of low-temperature electronics, the physics of superconducting hybrid systems based on superconductors (Ss) and ferromagnets (Fs), which is known as superconducting spintron„ics. We present theoretical and experimental results on studies of the proximity effect with a ferromagnet, which forms an unusual superconducting state in the vicinity of the S/F interface and allows controlling dissipationless charge and spin transport in hybrid structures by changing the texture and properties of the magnetic subsystem. Particular attention is devoted to the properties of the generation of spin-triplet Cooper pairs at the S/F interface that ensure the most efficient interplay between superconductivity and ferromagnetism, including in systems with full spin-polarization of bands (semimetals) and considerable spin—orbit coupling. Problems with the electrodynamics of S/F structures, which have not been covered by previous reviews on superconducting spintronics, are discussed in detail, including the features of the formation of inhomogeneous superconducting and magnetic states due to spin—orbit coupling, long-range triplet correlations in ferromagnets, the electrodynamic proximity effect, and Larkin—Ovchinnikov—Fulde—Ferrell-type instability with a modulation vector in the plane of S/F structure layers. We also discuss the current state of experimental work and promising theoretical concepts and problems relevant to the further development of superconducting spintronics.

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Fulltext is also available at DOI: 10.3367/UFNe.2021.07.039020
Keywords: proximity effect, electromagnetic response, singlet and triplet superconducting correlations, hybrid superconductor—ferromagnet structures, spin-orbit coupling
PACS: 74.20.−z, 74.78.−w, 85.25.−j (all)
DOI: 10.3367/UFNe.2021.07.039020
URL: https://ufn.ru/en/articles/2022/12/f/
001112544300005
2-s2.0-85145804006
2022PhyU...65.1248M
Citation: Mel’nikov A S, Mironov S V, Samokhvalov A V, Buzdin A I "Superconducting spintronics: state of the art and prospects" Phys. Usp. 65 1248–1289 (2022)
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Received: 4th, June 2021, revised: 7th, July 2021, 12th, July 2021

Оригинал: Мельников А С, Миронов С В, Самохвалов А В, Буздин А И «Сверхпроводящая спинтроника: современное состояние и перспективы» УФН 192 1339–1384 (2022); DOI: 10.3367/UFNr.2021.07.039020

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