Theoretical modeling of experimental HREEL spectra for supported graphene
MetadataShow full item record
We present a simple model for the resonant feature designated as the pi plasmon in single-layer graphene supported by a metal substrate, which is excited via high-resolution electron energy loss spectroscopy (HREELS) in the off-specular scattering geometry. Using a two-dimensional, two-fluid hydrodynamic model for interband transitions of graphenes pi and sigma electrons and an empirical Drude-Lorentz model for the metal in the local approximation enables us to reproduce, at the qualitative and semi-quantitative levels, the typical experimental features of the HREEL spectra in the visible to the ultraviolet frequency range. (C) 2014 Elsevier B.V. All rights reserved.
Keywords:Graphene / HREELS / Dielectric function
Source:Physics Letters A, 2014, 378, 30-31, 2206-2210
- Functional, Functionalized and Advanced Nanomaterials (RS-45005)
- Natural Sciences and Engineering Research Council of Canada