Ultrafast nonequilibrium carrier dynamics in a single graphene layer
| Autor: | Markus Breusing, Ermin Malic, Andreas Knorr, Claus Ropers, Thomas Elsaesser, Frank Milde, Sergei Kuehn, Jürgen P. Rabe, Nikolai Severin, Torben Winzer |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Materials science
Condensed matter physics Phonon scattering Phonon Graphene Relaxation (NMR) Physics::Optics 02 engineering and technology Electron 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 7. Clean energy Electronic Optical and Magnetic Materials law.invention Condensed Matter::Materials Science law 0103 physical sciences Condensed Matter::Strongly Correlated Electrons Microscopic theory 010306 general physics 0210 nano-technology Spectroscopy Ultrashort pulse |
| Zdroj: | Physical Review B. 83 |
| ISSN: | 1550-235X 1098-0121 |
| DOI: | 10.1103/physrevb.83.153410 |
| Popis: | Nonequilibrium carrier dynamics in single exfoliated graphene layers on muscovite substrates are studied by ultrafast optical pump-probe spectroscopy and compared with microscopic theory. The very high 10-fs-time resolution allows for mapping the ultrafast carrier equilibration into a quasi-Fermi distribution and the subsequent slower relaxation stages. Coulomb-mediated carrier-carrier and carrier-optical phonon scattering are essential for forming hot separate Fermi distributions of electrons and holes which cool by intraband optical phonon emission. Carrier cooling and recombination are influenced by hot phonon effects. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|