Observing Hot Carrier Distribution In An N-Type Epitaxial Graphene On A Sic Substrate
APPLIED PHYSICS LETTERS(2014)
Abstract
Hot carrier dynamics in the Dirac band of n-type epitaxial graphene on a SiC substrate were traced in real time using femtosecond-time-resolved photoemission spectroscopy. The spectral evolution directly reflects the energetically linear density of states superimposed with a Fermi-Dirac distribution. The relaxation time is governed by the internal energy dissipation of electron-electron scattering, and the observed electronic temperature indicates cascade carrier multiplication. (C) 2014 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.
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Key words
epitaxial graphene,hot carrier distribution
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