title: Growth from behind: Intercalation-growth of two-dimensional FeO moiré structure underneath of metal-supported graphene.
abstract: Growth of graphene by chemical vapor deposition on metal supports has become a promising approach for the large-scale synthesis of high quality graphene. Decoupling of the graphene from the metal has been achieved by either mechanical transfer or intercalation of elements/molecules in between the metal and graphene. Here we show that metal stabilized two-dimensional (2D)-oxide monolayers can be grown in between graphene and the metal substrate thus forming 2D-heterostructures that enable tuning of the materials properties of graphene. Specifically, we demonstrate the intercalation-growth of a 2D-FeO layer in between graphene and Pt(111), which can decouple the graphene from the metal substrate. It is known that the 2D-FeO/Pt(111) system exhibits a moiré-structure with locally strongly varying surface potential. This variation in the substrate surface potential modifies the interface charge doping to graphene locally, causing nanometer-scale variation in its work function and Fermi-level shifts relative to its Dirac point.
authors.affiliation: Department of Physics, University of South Florida, Tampa, FL 33620, USA.
authors.forename: Arjun
authors.initials: A
authors.lastname: Dahal
authors.affiliation: Department of Physics, University of South Florida, Tampa, FL 33620, USA.
authors.forename: Matthias
authors.initials: M
authors.lastname: Batzill