Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MA: Fachverband Magnetismus
MA 52: Altermagnets
MA 52.14: Vortrag
Freitag, 22. März 2024, 13:00–13:15, EB 202
Altermagnetic signatures in the ultrafast photoconductivity of RuO2 — •Stephan Wust1, Marius Weber1, Akashdeep Akashdeep2, Luca Haag1, Kai Leckron1, Christin Schmitt2, Rafael Ramos3, Takashi Kikkawa4, Eiji Saitoh4, Mathias Kläui2, Libor Šmejkal2, Jairo Sinova2, Martin Aeschlimann1, Gerhard Jakob2, Hans Christian Schneider1, and Benjamin Stadtmüller1 — 1Department of Physics and Research Center OPTIMAS, University of Kaiserslautern-Landau, 67663 Kaiserslautern, Germany — 2Institut für Physik, Johannes Gutenberg University Mainz, 55099 Mainz, Germany — 3CIQUS, Departamento de Química-Física, Universidade de Santiago de Compostela, Santiago de Compostela, Spain — 4Department of Applied Physics, The University of Tokyo, Tokyo 113-8656, Japan
The discovery of altermagnets as a new class of magnets opens new avenues to exploit spin-polarized electron conductivity in materials with compensated spin structures. This is possible due to the spin-split band structure of altermagnets and the corresponding non-relativistic spin polarization, leading to novel effects such as spin-splitter currents. Here, we demonstrate the existence of characteristic altermagnetic signatures in the photoconductivity of the prototypical altermagnet RuO2 after optical excitation using fs light pulses. This is achieved by combining all-optical pump-probe methods with ab-initio calculations, which together provide insight into the spin polarization of the optically excited carriers in RuO2 for different excitation geometries.
Keywords: Altermagnet; Ultrafast; RuO2; spin-polarization; Photoconductivity