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• W2420222912 abstract "We formulate a theory of spin-transfer torques in textured antiferromagnets, which covers the small to large limits of the exchange coupling energy relative to the kinetic energy of the intersublattice electron dynamics. Our theory suggests a natural definition of the efficiency of spin-transfer torques in antiferromagnets in terms of well-defined material parameters, revealing that the charge current couples predominantly to the antiferromagnetic order parameter and the sublattice-canting moment in, respectively, the limits of large and small exchange coupling. The effects can be quantified by analyzing the antiferromagnetic spin-wave dispersions in the presence of charge current: in the limit of large exchange coupling the spin-wave Doppler shift always occurs, whereas, in the opposite limit, the only spin-wave modes to react to the charge current are ones that carry a pronounced sublattice-canting moment. The findings offer a framework for understanding and designing spin-transfer torques in antiferromagnets belonging to different classes of sublattice structures such as, e.g., bipartite and layered antiferromagnets." @default.
• W2420222912 created "2016-06-24" @default.
• W2420222912 creator A5005676705 @default.
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• W2420222912 date "2016-08-05" @default.
• W2420222912 modified "2023-10-18" @default.
• W2420222912 title "Spin-transfer torques in antiferromagnetic textures: Efficiency and quantification method" @default.
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• W2420222912 doi "https://doi.org/10.1103/physrevb.94.054409" @default.
• W2420222912 hasPublicationYear "2016" @default.
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