| Issue |
EPJ Web Conf.
Volume 205, 2019
XXI International Conference on Ultrafast Phenomena 2018 (UP 2018)
|
|
|---|---|---|
| Article Number | 05006 | |
| Number of page(s) | 3 | |
| Section | Semiconductors, Transition-Metals and Nanocrystals | |
| DOI | https://doi.org/10.1051/epjconf/201920505006 | |
| Published online | 16 April 2019 | |
https://doi.org/10.1051/epjconf/201920505006
Theoretical study of the ultrashort dynamics in graphene after fs-laser excitation
Theoretical Physics II, University of Kassel, 34132 Kassel, Germany
* Corresponding author: krylow@physik.uni-kassel.de
Published online: 16 April 2019
We report on the calculation of the full dynamics of graphene after ultrafast laser excitation using ab-initio molecular dynamics simulations. Our calculations show a biexponential decay of the (100) and (110) Bragg peaks in time, similar to experimental results. Furthermore, we calculate the time-evolution of the phonon energies averaged over sets of phonons, chosen by their phonon frequencies. Our results suggest that the fast decay time can be accounted by phonon-phonon interactions rather than the generation of SCOPs. The slower decay time is governed by the equilibration of the system with low frequency phonon modes.
© The Authors, published by EDP Sciences, 2019
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