Ultrafast carrier dynamics in graphite
| Autor: | Thomas Elsaesser, Markus Breusing, Claus Ropers |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Materials science
Kinetics General Physics and Astronomy 02 engineering and technology Electron 021001 nanoscience & nanotechnology 01 natural sciences Molecular physics Condensed Matter::Materials Science symbols.namesake Condensed Matter::Superconductivity Quantum mechanics 0103 physical sciences Boltzmann constant symbols Graphite 010306 general physics 0210 nano-technology Spectroscopy Carrier dynamics Ultrashort pulse |
| Zdroj: | Physical review letters. 102(8) |
| ISSN: | 0031-9007 |
| Popis: | Optical pump-probe spectroscopy with 7-fs pump pulses and a probe spectrum wider than 0.7 eV reveals the ultrafast carrier dynamics in freestanding thin graphite films. We discern for the first time a rapid intraband carrier equilibration within 30 fs, leaving the system with separated electron and hole chemical potentials. Phonon-mediated intraband cooling of electrons and holes occurs on a 100 fs time scale. The kinetics are in agreement with simulations based on Boltzmann equations. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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