Dresden 2026 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MA: Fachverband Magnetismus
MA 47: Altermagnets V
MA 47.3: Vortrag
Donnerstag, 12. März 2026, 15:30–15:45, HSZ/0002
Spin polarized optical excitation in altermagnetic RuO2 — •Paul Herrgen1, Luca Haag1, Stephan Wust1, Marius Weber1, Akashdeep Akashdeep2, Mathias Kläui2, Gerhard Jakob2, Hans Christian Schneider1, Benjamin Stadtmüller3, and Martin Aeschlimann1 — 1Department of Physics and Research Center OPTIMAS, RPTU University Kaiserslautern-Landau, 67663 Kaiserslautern, Germany — 2Institute of Physics, Johannes Gutenberg University Mainz, 55099 Mainz, Germany — 3Institute of Physics, University of Augsburg, 86159 Augsburg, Germany
Altermagnetic materials open new avenues for spintronic applications in compensated magnets due to the spin-split band structure. This unconventional electronic configuration enables access to spin-polarized, all-optical excitation despite the absence of a net magnetization.
In this work, we experimentally probe optically induced spin polarization in the altermagnetic material candidate RuO2 [1]. The out-of-plane Néel vector of the system allows for the detection of the induced spin polarization via polar magneto-optical Kerr effect (MOKE) measurements. In light of the ongoing debate surrounding the altermagnetic nature of RuO2, we conducted a systematic study across a range of film thicknesses. Our results show that altermagnetic behavior is observable only in the thinnest films, while increasing thickness leads to a progressive suppression of the characteristic altermagnetic response.
[1]: Weber et al., arXiv:2408.05187 (2024)
Keywords: Altermagnet; Ultrafast; MOKE