Non-relativistic torque and Edelstein effect in non-collinear magnets

Rafael González-Hernández (), Philipp Ritzinger, Karel Výborný, Jakub Železný () and Aurélien Manchon ()
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Rafael González-Hernández: Universidad del Norte
Philipp Ritzinger: Czech Academy of Sciences
Karel Výborný: Czech Academy of Sciences
Jakub Železný: Czech Academy of Sciences
Aurélien Manchon: CNRS, CINaM

Nature Communications, 2024, vol. 15, issue 1, 1-10

Abstract: Abstract The Edelstein effect is the origin of the spin-orbit torque: a current-induced torque that is used for the electrical control of ferromagnetic and antiferromagnetic materials. This effect originates from the relativistic spin-orbit coupling, which necessitates utilizing materials with heavy elements. Here, we show that in magnetic materials with non-collinear magnetic order, the Edelstein effect and, consequently, a current-induced torque can exist even in the absence of the spin-orbit coupling. Using group symmetry analysis, model calculations, and realistic simulations on selected compounds, we identify large classes of non-collinear magnet candidates and demonstrate that the current-driven torque is of similar magnitude as the celebrated spin-orbit torque in conventional transition metal structures. We also show that this torque can exist in an insulating material, which could allow for highly efficient electrical control of magnetic order.

Date: 2024
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DOI: 10.1038/s41467-024-51565-6

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