Abstract
The energy-dependence of the electronic scattering time is probed by Landau level spectroscopy in quasi neutral multilayer epitaxial graphene. From the Landau levels broadening we find that the scattering rate increases linearly with energy. This implies a surprising property of the Landau level spectrum in graphene - the number of the resolved Landau levels remains constant with the applied magnetic field. Insights are given about possible scattering mechanism and carrier mobilities in the graphene system investigated.
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