Journal
JOURNAL OF PHYSICS-CONDENSED MATTER
Volume 26, Issue 39, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0953-8984/26/39/393001
Keywords
work function; graphene; image-potential states
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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.
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