Altermagnetism from a strong-coupling perspective

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 why one of the most prominent examples of strong-coupling altermagnetism is difficult to observe in real materials [1]. Next, I will explore whether there is a way to observe altermagnetism in strongly correlated copper oxides [2]. Last but not least, I will examine an interesting scenario for detecting altermagnetism in the strongly correlated limit using ARPES [3].

[1] V. Leeb, A. Mook, L. Šmejkal, and J. Knolle; Phys. Rev. Lett. 132, 236701

[2] Y. Li, V. Leeb, K. Wohlfeld, R. Valentí, J. Knolle; arXiv:2412.11922

[3] M. Daghofer, K. Wohlfeld, J. van den Brink (in preparation, 2025).

The talk will be given in English