Regensburg 2019 – wissenschaftliches Programm
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 Sinova1,2 — 1INSPIRE 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 . 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 . Here, we will catalogue antiferromagnetic systems based on their symmetry and topology . 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 , and topological anomalous Hall effect in complex magnetic systems . Finally, we will identify a broad list of real material candidates by our first-principle calculations and band-structure engineering.
 L. Šmejkal, Y. Mokrousov, B. Yan, and A. H. MacDonald, Nat. Phys. (2018)  S. Yu. Bodnar, L. Šmejkal, et al. Nat. Comm. (2018)  L. Šmejkal, and T. Jungwirth, book chapter in Topology in Magnetism, Springer (2018)  L. Šmejkal, J. Železný, J. Sinova, and T. Jungwirth, Phys. Rev. Lett. (2017)  L. Šmejkal, R. González-Hernandez, T. Jungwirth, and J. Sinova, arXiv (2018)