SKM 2023 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 41: Focus Session: Altermagnetism: Transport, Optics, Excitations
MA 41.2: Hauptvortrag
Donnerstag, 30. März 2023, 15:30–16:00, HSZ 02
Spontaneous Hall effect in Mn5Si3 altermagnet — •H. Reichlova1,2, R. Lopes Seeger3, R. González-Hernández4, I. Kouta6, R. Schlitz1, D. Kriegner2, P. Ritzinger2, M. Lammel9, M. Leiviska3, V. Petricek2, E. Schmoranzerova7, A. Badura2, A. Thomas1,8, V. Baltz3, L. Michez6, J. Sinova5,2, S.T.B. Goennenwein9, T. Jungwirth2,10, and L. Smejkal5,2 — 1IFMP, Technische Universität Dresden — 2Institute of Physics CAS, Czech Republic — 3CNRS, CEA, Grenoble, France — 4Universidad del Norte, Barranquilla, Colombia — 5Johannes Gutenberg Universität Mainz — 6CINaM, Marseille, France — 7MFF Charles University, Praha, Czech Republic — 8IFW Dresden — 9Universität Konstanz — 10University of Nottingham, United Kingdom
The family of materials that can exhibit spontaneous Hall effect has been significantly expanded by discovery of altermagnets with opposite spin sublattices coupled by crystallographic rotations [1]
I present our observations of the spontaneous Hall effect in an altermagnetic candidate - Mn5Si3 epilayers [2]. Epitaxial constraints stabilize a hexagonal unit cell in the magnetic state distinct from previously described phases in bulk crystals and we observe a sizable spontaneous Hall conductivity. The signal can be explained by an unprecedented altermagnetic band structure with time-reversal symmetry breaking spin-polarized valleys.
[1] Smejkal et al. Science Advances 6, 23 (2020) [2] Reichlova H. et al., arXiv:2012.15651