Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2009-01-02
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
6 pages, 9 figures
Scientific paper
10.1103/PhysRevB.79.115447
Electron-hole generation and recombination rates for intravalley and intervalley phonon scattering in Graphene are presented. The transverse and the longitudinal optical phonon modes ($E_{2g}$-modes) near the zone center ($\Gamma$-point) contribute to intravalley interband carrier scattering. At the zone edge ($K(K')$-point), only the transverse optical phonon mode ($A'_{1}$-mode) contributes significantly to intervalley interband scattering with recombination rates faster than those due to zone center phonons. The calculated recombination times range from less than a picosecond to more than hundreds of picoseconds and are strong functions of temperature and electron and hole densities. The theoretical calculations agree well with experimental measurements of the recombination rates of photoexcited carriers in graphene.
Chandrashekhar Mvs
Dawlaty Jahan
George Paul A.
Rana Farhan
Shivaraman Shriram
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