Regensburg 2019 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 36: Spin transport

MA 36.8: Vortrag

Mittwoch, 3. April 2019, 16:45–17:00, H53

Topological magnetotransport in antiferromagnetic spintronics — •Libor Šmejkal1,2, Rafael González-Hernández1, Tomáš Jungwirth2, and Jairo Sinova1,21INSPIRE group, Uni Mainz, Germany — 2Institute of Physics, Czech Academy of Sciences, Prague, Czech Rep.

Merging topological quasiparticles with magnetism became a new direction in the field of topological quantum materials and topological spintronics [1]. Based on ab initio theory, we have predicted a large anisotropic magnetoresistance reaching 6% in Mn2Au antiferromagnet which was recently observed in current-induced torques experiments [2]. Here, we will catalogue antiferromagnetic systems based on their symmetry and topology [3]. We will show how the presence and breaking of time-reversal symmetry in our antiferromagnetic models open the avenues for relativistic metal-insulator transition and giant anisotropic magnetoresistance [4], and topological anomalous Hall effect in complex magnetic systems [5]. Finally, we will identify a broad list of real material candidates by our first-principle calculations and band-structure engineering.

[1] L. Šmejkal, Y. Mokrousov, B. Yan, and A. H. MacDonald, Nat. Phys. (2018) [2] S. Yu. Bodnar, L. Šmejkal, et al. Nat. Comm. (2018) [3] L. Šmejkal, and T. Jungwirth, book chapter in Topology in Magnetism, Springer (2018) [4] L. Šmejkal, J. Železný, J. Sinova, and T. Jungwirth, Phys. Rev. Lett. (2017) [5] L. Šmejkal, R. González-Hernandez, T. Jungwirth, and J. Sinova, arXiv (2018)

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