Carrier Dynamics in Graphene: Ultrafast Many-Particle Phenomena
| Autor: | Samuel Brem, Roland Jago, Harald Schneider, Tobias Plötzing, Ermin Malic, Daniel Neumaier, Florian Wendler, Jacob C. König-Otto, Manfred Helm, Torben Winzer, Martin Mittendorff, Andreas Knorr, Stephan Winnerl |
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| Rok vydání: | 2017 |
| Předmět: |
Physics
Condensed matter physics Scattering Graphene Terahertz radiation Carrier scattering Physics::Optics General Physics and Astronomy 02 engineering and technology 021001 nanoscience & nanotechnology Population inversion 01 natural sciences 7. Clean energy law.invention Multiple exciton generation Condensed Matter::Materials Science law 0103 physical sciences Physics::Atomic and Molecular Clusters Density of states Charge carrier Physics::Chemical Physics 010306 general physics 0210 nano-technology |
| Zdroj: | Annalen der Physik. 529:1700038 |
| ISSN: | 0003-3804 |
| DOI: | 10.1002/andp.201700038 |
| Popis: | Graphene is an ideal material to study fundamental Coulomb- and phonon-induced carrier scattering processes. Its remarkable gapless and linear band structure opens up new carrier relaxation channels. In particular, Auger scattering bridging the valence and the conduction band changes the number of charge carriers and gives rise to a significant carrier multiplication - an ultrafast many-particle phenomenon that is promising for the design of highly efficient photodetectors. Furthermore, the vanishing density of states at the Dirac point combined with ultrafast phonon-induced intraband scattering results in an accumulation of carriers and a population inversion suggesting the design of graphene-based terahertz lasers. Here, we review our work on the ultrafast carrier dynamics in graphene and Landau-quantized graphene is presented providing a microscopic view on the appearance of carrier multiplication and population inversion. |
| Databáze: | OpenAIRE |
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