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. 2009 Feb 27;102(8):086809.
doi: 10.1103/PhysRevLett.102.086809. Epub 2009 Feb 27.

Ultrafast carrier dynamics in graphite

Markus Breusing  1 , Claus Ropers, Thomas Elsaesser
Affiliations

Ultrafast carrier dynamics in graphite

Markus Breusing et al. Phys Rev Lett. .

Abstract

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.

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