SKM 2023 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 7: Spin Transport and Orbitronics, Spin-Hall Effects (joint session MA/TT)
TT 7.12: Vortrag
Montag, 27. März 2023, 12:15–12:30, HSZ 403
Anisotropic anomalous Hall effect in altermagnetic Mn5Si3 — •Miina Leiviskä1, Rafael Lopes Seeger1, Helena Reichlová2,3, Ismaïla Kounta4, Libor Šmejkal5,3, Javier Rial1, Sebastian Beckert2, Antonín Badura6,7, Isabelle Joumard1, Dominik Kriegner2,3, Eva Schmoranzerová6, Jairo Sinova5, Tomáš Jungwirth3, Sebastian Goennenwein7, Lisa Michez4, and Vincent Baltz1 — 1Univ. Grenoble Alpes, CNRS, CEA, Grenoble INP, IRIG-SPINTEC, F-38000 Grenoble — 2Institute of Solid State and Materials Physics, TU Dresden, Dresden, Germany — 3Institute of Physics, Czech Academy of Sciences, Prague, Czechia — 4Aix-Marseille University, CNRS, CINaM, Marseille, France — 5Institute for Physics, Johannes Gutenberg University Mainz, Mainz, Germany — 6Department of Chemical Physics and Optics, Faculty of Mathematics and Physics, Charles University, Prague, Czechia — 7Department of Physics, University of Konstanz, Konstanz, Germany
The altermagnetic epitaxial films of Mn5Si3 exhibit anomalous Hall effect (AHE) despite the vanishing net magnetization [1]. This can be explained by non-relativistic time-reversal symmetry breaking, which allows for momentum-locked alternating spin-splitting of the bands [2]. Here, we investigate the anisotropy of the AHE by varying both the external field and the current channel orientations. In both cases, we observe unconventional, anisotropic behaviour that deviates from the typical behaviour of ferromagnets.
[1] H. Reichlova et al. arXiv:2012.15651, (2020)
[2] L. Šmejkal et al. Phys Rev X 12, 031042 (2022)