SKM 2023 – scientific programme

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MA: Fachverband Magnetismus

MA 40: Poster Magnetism II

MA 40.64: Poster

Thursday, March 30, 2023, 14:00–16:00, P2/EG

Magneto-transport measurements in altermagnetic RuO₂ and MnTe — •Ruben Dario Gonzalez Betancourt^1,2,3,4, Jan Zubáč^3,4, Rafael Julian Gonzalez Hernandez⁵, Kevin Geishendorf³, Zbynek Šobáň³, Gunther Springholz⁶, Kamil Olejník³, Jakub Železný³, Philipp Ritzinger³, Joseph Dufouleur², Louis Veyrat², Teresa Tschirner², Simon Moser⁷, Libor Šmejkal⁸, Tomas Jungwirth^3,9, Sebastian Tobias Benedikt Goennenwein^1,10, Andy Thomas^1,2, Dominik Kriegner³, and Helena Reichlová^1,3 — ¹IFMP, TU Dresden — ²IFW Dresden — ³Institute of Physics, AV ČR, Prague — ⁴Charles University, Prague — ⁵Universidad del Norte, Barranquilla — ⁶JKU Linz — ⁷University of Wuerzbug — ⁸JGU, Mainz — ⁹University of Nottingham — ¹⁰University of Konstanz

In altermagnets [1], spin polarization in both crystal-structure real space and electronic-structure momentum space alternates and, consequently, it enables effects that were believed to be exclusive to ferromagnets. Many of the predicted altermagnetic phenomena [2] await their experimental confirmation. Here, we present a magneto-transport characterization of two altermagnetic materials - semiconducting MnTe [3] and metallic RuO₂. We discuss which contributions to the measured transversal and longitudinal signals can be signatures of the unconventional altermagnetic phase.

[1] L. Šmejkal et al., Phys. Rev. X. 12.031042 (2022) [2] L. Šmejkal et al., Phys. Rev. X. 12.011028 (2022) [3] R. D. Gonzalez Betancourt et al., (2021) arXiv:2112.06805