The Chiral Spin-Orbitronics of a Helimagnet–Normal Metal Heterojunction

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Abstract

A theory of spin and charge transport in bounded metallic magnets has been constructed, which takes into account the effects of spin-orbit scattering of conduction electrons by crystal lattice defects. The theory can be used to describe the spin Hall effect and the anomalous Hall effect and can serve as a basis for describing the phenomena of spin-orbitronics. Phenomenological boundary conditions for the charge and spin fluxes at the interface between two different metals have been formulated, on the basis of which the injec-tion of a pure spin current into a helimagnet, which arises in a normal metal as a manifestation of the spin Hall effect, is described. The existence of an “effect of chiral polarization of a pure spin current” is predicted, which consists in the appearance in a helimagnet of a longitudinally polarized pure spin current and a longi-tudinal component of the nonequilibrium electron magnetization, depending on the chirality of the helimag-net helix, upon injection of a transversely polarized spin current from a normal metal.

About the authors

V. V. Ustinov

Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences; Institute of Natural Sciences and Mathematics, Ural Federal University

Email: ustinov@imp.uran.ru
Ekaterinburg, 620108 Russia; Ekaterinburg, 620002 Russia

I. A. Yasyulevich

Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences

Email: ustinov@imp.uran.ru
Ekaterinburg, 620108 Russia

N. G. Bebenin

Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences

Author for correspondence.
Email: ustinov@imp.uran.ru
Ekaterinburg, 620108 Russia

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Copyright (c) 2023 В.В. Устинов, И.А. Ясюлевич, Н.Г. Бебенин

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