Regensburg 2022 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MA: Fachverband Magnetismus
MA 21: Terahertz Spintronics
MA 21.11: Vortrag
Mittwoch, 7. September 2022, 12:00–12:15, H43
Ultrafast coherent THz lattice dynamics coupled to spins in a van der Waals antiferromagnetic flake — •Fabian Mertens1, David Mönkebüscher1, Eugenio Coronado2, Samuel Mañas-Valero2, Carla Boix-Constant2, Alberta Bonanni3, Margherita Matzer3, Rajdeep Adhikari3, Alexandra M. Kalashnikova4, Umut Parlak1, Davide Bossini1, 5, and Mirko Cinchetti1 — 1Department of Physics, TU Dortmund University, Otto-Hahn-Straße 4, 44227 Dortmund, Germany — 2Instituto de Ciencia Molecular (ICMol) Universidad de Valencia, Spain — 3Institute of Semiconductor and Solid State Physics, Johannes Kepler University Linz, Austria — 4alexandra.kalashnikova@gmail.com — 5Department of Physics and Center for Applied Photonics, University of Konstanz, Germany
We used the setup described in [1] to study the laser driven lattice and spin dynamics of a 380 nm thick flake of the antiferromagnetic van der Waals semiconductor FePS3 as a function of excitation photon energy and sample temperature.
We found evidence of a coherent optical lattice mode at a frequency of 3.2 THz.
The amplitude of the phononic signal vanishes as the phase transition to the paramagnetic phase occurs, revealing its close connection to the long-range magnetic order.
These findings open a pathway towards the coherent manipulation of the magneto-crystalline anisotropy in a van der Waals antiferromagnet, scalable down to thinner flakes.
[1] F. Mertens et al., Review of Scientific Instruments 91 (2020)