Electronic structures of graphene layers on a metal foil: The effect of atomic-scale defects

Here, we report a facile method to generate a high density of atomic-scale defects in graphene on metal foil and show how these defects affect the electronic structures of graphene layers. Our scanning tunneling microscope measurements, complemented by first-principles calculations, reveal that the atomic-scale defects result in both the intervalley and intravalley scattering of graphene. The Fermi velocity is reduced in the vicinity area of the defect due to the enhanced scattering. (C) 2013 AIP Publishing LLC.Physics, AppliedSCI(E)EI7ARTICLE14null10