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MA: Fachverband Magnetismus
MA 46: Poster II
MA 46.59: Poster
Thursday, March 21, 2024, 15:00–18:00, Poster C
Theoretical study of optical excitation effects in RuO2 — •Luca Haag1, Marius Weber1, Kai Leckron1, Stephan Wust1, Benjamin Stadtmüller1, Libor Šmejkal2, Jairo Sinova2, and Hans Christian Schneider1 — 1Department of Physics and Research Center OPTIMAS, University of Kaiserslautern-Landau, 67633 Kaiserslautern, Germany — 2Institut für Physik, Johannes Gutenberg University Mainz, 55099 Mainz, Germany
We study theoretically the optical response of the d-wave altermagnet RuO2. As an
altermagnetic material RuO2 shows a momentum-dependent spin polarization in
reciprocal space without net magnetization [1,2]. We investigate in particular how the
underlying symmetries affect its optical characteristics. We employ a hybrid approach
that combines Density Functional Theory (DFT) and optical transition probabilities in
a Fermi’s Golden Rule approach [3] to simulate the excitation with momentum, spin
and band resolution.
[1] L. Šmejkal et al., Phys. Rev. X 12, 040501 (2022)
[2] L. Šmejkal et al., Phys. Rev. X 12, 011028 (2022)
[3] S. Essert and H. C. Schneider, Phys. Rev. B. 84, 224405 (2011)
Keywords: altermagnetism; optics; ultrafast