5 March 2018 Coherent phonon dynamics in misfit-layered chalcogenide LaVS3 crystal
Author Affiliations +
Abstract
We show time resolved spectroscopy measurements with femtosecond time resolution in LaVS3 crystal. Transient reflectivity reveals the existence of a preferential coupling between the photexcited electrons and the coherently excited A1g phonon mode. The time scale of this coupling is around 140 fs, whereas the time-scale of the interaction between the A1g phonon mode and the other phonons is around 400 fs. This phonon mode is damped in less then 2 ps. On longer time scale, the transient dynamics is characterized by a long-standing plateau of reflectivity, which can be due to either low inter-plane thermal conductivity or to a metastable state caused by carrier trapping in vanadium cluster.
Conference Presentation
© (2018) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
M. Lejman, M. Lejman, G. Galle, G. Galle, J. Faure, J. Faure, L. Cario, L. Cario, D. Boschetto, D. Boschetto, } "Coherent phonon dynamics in misfit-layered chalcogenide LaVS3 crystal", Proc. SPIE 10530, Ultrafast Phenomena and Nanophotonics XXII, 105300N (5 March 2018); doi: 10.1117/12.2287357; https://doi.org/10.1117/12.2287357
PROCEEDINGS
6 PAGES + PRESENTATION

SHARE
Back to Top