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Coherent antiferromagnetic spintronics

Abstract

Antiferromagnets have attracted extensive interest as a material platform in spintronics. So far, antiferromagnet-enabled spin–orbitronics, spin-transfer electronics and spin caloritronics have formed the bases of antiferromagnetic spintronics. Spin transport and manipulation based on coherent antiferromagnetic dynamics have recently emerged, pushing the developing field of antiferromagnetic spintronics towards a new stage distinguished by the features of spin coherence. In this Review, we categorize and analyse the critical effects that harness the coherence of antiferromagnets for spintronic applications, including spin pumping from monochromatic antiferromagnetic magnons, spin transmission via phase-correlated antiferromagnetic magnons, electrically induced spin rotation and ultrafast spin–orbit effects in antiferromagnets. We also discuss future opportunities in research and applications stimulated by the principles, materials and phenomena of coherent antiferromagnetic spintronics.

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Fig. 1: Illustration of magnon eigenmodes (uniform modes with zero wavenumber) in collinear antiferromagnets.
Fig. 2: Spin pumping from sub-terahertz AFM magnons.
Fig. 3: Spin transmission via phase-correlated AFM magnons and magnon pseudospin dynamics in easy-plane α-Fe2O3.
Fig. 4: SOT-driven coherent chiral-spin rotation in non-collinear antiferromagnet Mn3Sn.
Fig. 5: Ultrafast SOT switching and spin current generation in antiferromagnets.

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Acknowledgements

S.F. acknowledges funding from JSPS Kakenhi grant numbers 19H05622 and 22F32037, MEXT Initiative to Establish Next-generation Novel Integrated Circuits Centers (X-NICS) grant number JPJ011438 and the Cooperative Research Projects of the RIEC. R.C. is supported by the US Air Force Office of Scientific Research grant number FA9550-19-1-0307. L.L. acknowledges support from the US National Science Foundation grant number DMR-2104912. J.H. acknowledges support from the JSPS Postdoctoral Fellowship for Research in Japan.

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Han, J., Cheng, R., Liu, L. et al. Coherent antiferromagnetic spintronics. Nat. Mater. 22, 684–695 (2023). https://doi.org/10.1038/s41563-023-01492-6

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