Aufgrund von Vorbereitungen auf eine neue Version von KOPS, können kommenden Montag und Dienstag keine Publikationen eingereicht werden. (Due to preparations for a new version of KOPS, no publications can be submitted next Monday and Tuesday.)
Type of Publication: | Journal article |
URI (citable link): | http://nbn-resolving.de/urn:nbn:de:bsz:352-0-254009 |
Author: | Brida, Daniele; Tomadin, Andrea; Manzoni, Cristian; Kim, Yong Jin; Lombardo, Antonio; Milana, Silvia; Nair, Rahul Raveendran; Novoselov, Kostya; Ferrari, Andrea C.; Cerullo, Giulio; Polini, Marco |
Year of publication: | 2013 |
Published in: | Nature communications ; 4 (2013). - 1987. - eISSN 2041-1723 |
DOI (citable link): | https://dx.doi.org/10.1038/ncomms2987 |
Summary: |
Graphene is emerging as a viable alternative to conventional optoelectronic, plasmonic and nanophotonic materials. The interaction of light with charge carriers creates an out-of-equilibrium distribution, which relaxes on an ultrafast timescale to a hot Fermi-Dirac distribution, that subsequently cools emitting phonons. Although the slower relaxation mechanisms have been extensively investigated, the initial stages still pose a challenge. Experimentally, they defy the resolution of most pump-probe setups, due to the extremely fast sub-100 fs carrier dynamics. Theoretically, massless Dirac fermions represent a novel many-body problem, fundamentally different from Schrödinger fermions. Here we combine pump-probe spectroscopy with a microscopic theory to investigate electron–electron interactions during the early stages of relaxation. We identify the mechanisms controlling the ultrafast dynamics, in particular the role of collinear scattering. This gives rise to Auger processes, including charge multiplication, which is key in photovoltage generation and photodetectors.
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Subject (DDC): | 530 Physics |
Keywords: | Physical sciences, Condensed matter, Materials science, Optical physics |
Link to License: | In Copyright |
Bibliography of Konstanz: | Yes |
BRIDA, Daniele, Andrea TOMADIN, Cristian MANZONI, Yong Jin KIM, Antonio LOMBARDO, Silvia MILANA, Rahul Raveendran NAIR, Kostya NOVOSELOV, Andrea C. FERRARI, Giulio CERULLO, Marco POLINI, 2013. Ultrafast collinear scattering and carrier multiplication in graphene. In: Nature communications. 4, 1987. eISSN 2041-1723. Available under: doi: 10.1038/ncomms2987
@article{Brida2013Ultra-29079, title={Ultrafast collinear scattering and carrier multiplication in graphene}, year={2013}, doi={10.1038/ncomms2987}, volume={4}, journal={Nature communications}, author={Brida, Daniele and Tomadin, Andrea and Manzoni, Cristian and Kim, Yong Jin and Lombardo, Antonio and Milana, Silvia and Nair, Rahul Raveendran and Novoselov, Kostya and Ferrari, Andrea C. and Cerullo, Giulio and Polini, Marco}, note={Article Number: 1987} }
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