SKM 2023 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 41: Focus Session: Altermagnetism: Transport, Optics, Excitations

MA 41.5: Hauptvortrag

Donnerstag, 30. März 2023, 16:30–17:00, HSZ 02

Generation of tilted spin-current by the collinear antiferromagnet RuO2 — •Arnab Bose — Johannes Gutenberg Universität, Mainz, Germany

Recently a new type of magnetic material is theoretically proposed, referred to as *altermagnet* which is a collinear antiferromagnet in real space although hosting the spin-split bands in the momentum space that allows it to exhibit the properties of ferromagnet depending upon the direction of the current flow with respect to the crystal axis [1,2]. We report the first experimental evidence of strongly crystal axis-dependent unconventional transverse spin-current generation by the altermagnet RuO2 [3] arising from the novel spin-split bands as theoretically predicted [1]. This unconventional tilted spin-current is the key to the implementation of high-density nonvolatile magnetic memories.

[1] R. González-Hernández et. al. Phys. Rev. Lett. 126, 127701 (2021) [2] L. Šmejkal et. al. arXiv: 2204.10844 (2022) [3] A. Bose et. al. Nature Electronics 5, 267 (2022).