Altermagnetism from a strong-coupling perspective

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Recently, a new form of magnetism has been proposed -- so-called altermagnetism. While altermagnetism has mostly been discussed within the itinerant picture, here I would like to provide a brief overview of three important aspects related to altermagnetism in the strong-coupling limit. First, I will discuss how to search for materials that should show altermagnetic properties in the strong coupling limit [1]. Next, I will explore whether there is a way to observe altermagnetism in strongly correlated copper oxides -- i.e. the parent compounds to high-temperature superconductors [2]. Last but not least, I will show that strongly coupled altermagnets should show spin-momentum dependent quasiparticle damping in ARPES [3].

[1] V. Leeb, A. Mook, L. Šmejkal, and J. Knolle, Phys. Rev. Lett. 132, 236701 (2024); K. Wohlfeld, M. Daghofer, A. M. Oles, EPL 96, 27001 (2011).
[2] Y. Li, V. Leeb, K. Wohlfeld, R. Valentí, J. Knolle, arXiv:2412.11922.
[3] M. Daghofer, K. Wohlfeld, J. van den Brink (to be submitted, 2025); K. Wohlfeld, A. M. Oleś, P. Horsch, PRB 79, 224433 (2009).

The lecture will be in Polish on-site in room 203. ZOOM transmission will be available too.

Zoom information.