SKM 2023 – scientific programme

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MA: Fachverband Magnetismus

MA 41: Focus Session: Altermagnetism: Transport, Optics, Excitations

Thursday, March 30, 2023, 15:00–18:00, HSZ 02

While antiferromagnetic spintronics is an established research field, key spintronic functionalities such as giant/tunneling magnetoresistance (GMR/TMR), have remained elusive in compensated magnetic systems. This paradigm could change in the light of the recent theoretical discovery of a new class of magnetic materials so called altermagnets which feature alternating spin polarizations in both crystal-structure real space and electronic-structure momentum space. Despite the vanishing net magnetization and antiparallel spin arrangement, altermagnets were predicted to exhibit a robust anomalous Hall effect and GMR and spin transfer torque phenomena. The predictions have been already supported by initial experiments. The goal of this focus session is to introduce the concept of altermagnetism to the broad research community, to present the first experimental works and stimulate future research directions. Here, altermagnets are predicted to have a broad impact beyond spin-electronics in fields ranging from magneto-transport, ultra-fast photo-magnetism to superconductivity and magnetic topological matter. The Focus Session is organized by Dr. Matthias Althammer (Walther-Meißner-Institut, Garching), Prof. Sebastian Goennenwein (Uni Konstanz) and Dr. Andy Thomas (IFW Dresden).

	15:00	MA 41.1	Invited Talk: Altermagnetism and spin symmetries — •Libor Šmejkal
	15:30	MA 41.2	Invited Talk: Spontaneous Hall effect in Mn5Si3 altermagnet — •H. Reichlova, R. Lopes Seeger, R. González-Hernández, I. Kouta, R. Schlitz, D. Kriegner, P. Ritzinger, M. Lammel, M. Leiviska, V. Petricek, E. Schmoranzerova, A. Badura, A. Thomas, V. Baltz, L. Michez, J. Sinova, S.T.B. Goennenwein, T. Jungwirth, and L. Smejkal
	16:00	MA 41.3	Spin-split collinear antiferromagnets: a large-scale ab-initio study — •Yaqian Guo, Hui Liu, Oleg Janson, Ion Cosma Fulga, Jeroen van den Brink, and Jorge I. Facio
	16:15	MA 41.4	Giant magnetoresistance effects in altermagnets — •Anna Birk Hellenes, Rafael González-Hernández, Jairo Sinova, Tomas Jungwirth, and Libor Šmejkal
	16:30	MA 41.5	Invited Talk: Generation of tilted spin-current by the collinear antiferromagnet RuO2 — •Arnab Bose
	17:00	MA 41.6	Invited Talk: First-principles studies on the anomalous transport properties of ferromagnets, antiferromagnets, and altermagnets — •Wanxiang Feng
	17:30	MA 41.7	Invited Talk: Insight into chemical and magnetotransport properties of epitaxial α-Fe2O3/Pt bilayers — •Anna Kozioł-Rachwał, Natalia Kwiatek, Witold Skowroński, Krzysztof Grochot, Jarosław Kanak, Ewa Madej, Kinga Freindl, Józef Korecki, and Nika Spiridis