title: Image-potential states and work function of graphene.
abstract: Image-potential states of graphene on various substrates have been investigated by two-photon photoemission and scanning tunneling spectroscopy. They are used as a probe for the graphene-substrate interaction and resulting changes in the (local) work function. The latter is driven by the work function difference between graphene and the substrate. This results in a charge transfer which also contributes to core-level shifts in x-ray photoemission. In this review article, we give an overview over the theoretical models and the experimental data for image-potential states and work function of graphene on various substrates.
authors.forename: Daniel
authors.initials: D
authors.lastname: Niesner
authors.forename: Thomas
authors.initials: T
authors.lastname: Fauster