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Inverse Spin-Hall Effect and Spin Swapping in Spin-Split Superconductors.

Authors :
Kamra LJ
Linder J
Source :
Physical review letters [Phys Rev Lett] 2024 May 31; Vol. 132 (22), pp. 226002.
Publication Year :
2024

Abstract

When a spin-splitting field is introduced to a thin film superconductor, the spin currents polarized along the field couples to energy currents that can only decay via inelastic scattering. We study spin and energy injection into such a superconductor where spin-orbit impurity scattering yields inverse spin-Hall and spin-swapping currents. We show that the combined presence of a spin-splitting field, superconductivity, and inelastic scattering gives rise to a strong enhancement of the ordinary inverse spin-Hall effect, as well as unique inverse spin-Hall and spin-swapping signals orders of magnitude stronger than the ordinary inverse spin-Hall signal. These can be completely controlled by the orientation of the spin-splitting field, resulting in a long-range charge and spin accumulations detectable much further from the injector than in the normal state. While the enhanced inverse spin-Hall signals offer a major improvement in spin detection sensitivity, the unique spin-swap signals can be utilized for designing devices where both the spin and current directions are controlled and altered throughout the geometry.

Details

Language :
English
ISSN :
1079-7114
Volume :
132
Issue :
22
Database :
MEDLINE
Journal :
Physical review letters
Publication Type :
Academic Journal
Accession number :
38877944
Full Text :
https://doi.org/10.1103/PhysRevLett.132.226002