Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

PRV: Preisträgervorträge

PRV V

PRV V: Preisträgervortrag

Donnerstag, 20. März 2025, 13:15–13:45, H2

Altermagnetism and spin symmetries — •Libor Šmejkal — Max Planck Institute for the Physics of Complex Systems — Laureate of the Walter-Schottky-Prize 2025

Since the 1930s, magnetism had been divided into two main branches: ferromagnetism and antiferromagnetism. Recently, we have identified a new branch, altermagnetism, characterized by a d-, g-, or i-wave spin order [1]. Our discovery emerged from our systematic spin symmetry classification [1], analogous to the well-established classifications in the fields of superconductors, superfluids, or the Standard Model.

In this talk, we will outline our decade-long journey to uncover altermagnets, including the prediction of the anomalous Hall effect and unconventional electronic structure in compensated collinear magnets [2,3]. We will present our systematic classification that revealed beside the even-partial wave altermagnets also odd-partial wave unconventional magnets [4]. Additionally, we will highlight experimental observation of altermagnetism using photoemission spectroscopy [5] and nanoscale X-ray microscopy [6]. Finally, we will explore emerging research directions [7], more than 300 material candidates, and potential applications of altermagnets across and beyond solid-state physics [8], e.g. in ultrafast and low power nanoelectronics.

[1] PRX 12, 031042 (2022)

[2] Science Adv. 6, 23 (2020)

[3] PNAS 118 42 (2021)

[4] arXiv:2309.01607v3

[5] Nature 626, 517(2024)

[6] Nature 636, 348 (2024)

[7] arXiv:2411.19928

[8] https://www.science.org/content/article/breakthrough-2024,
[8] https://www.economist.com/science-and-technology/2024/01/24/
[8] scientists-have-found-a-new-kind-of-magnetic-material

Keywords: Altermagnetism; Spin symmetry; Anomalous Hall effect; Magnetism; Electronic structure