Ultrafast carrier dynamics in graphite

Breusing, M.; Ropers, Claus; Elsaesser, T.

doi:10.1103/PhysRevLett.102.086809

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Ultrafast carrier dynamics in graphite

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Ropers, Claus
Department of Ultrafast Dynamics, MPI for Biophysical Chemistry, Max Planck Society;

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引用

Breusing, M., Ropers, C., & Elsaesser, T. (2009). Ultrafast carrier dynamics in graphite. Physical Review Letters, 102(8):. doi:10.1103/PhysRevLett.102.086809.

引用: https://hdl.handle.net/21.11116/0000-000B-5CEF-2

要旨

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.