%0 Journal Article
%T Local Gating of an Ir(111) Surface Resonance by Graphene Islands
%A S. J. Altenburg
%A J. Kr£żger
%A T. O. Wehling
%A B. Sachs
%A A. I. Lichtenstein
%A R. Berndt
%J Physics
%D 2012
%I arXiv
%X The influence of graphene islands on the electronic structure of the Ir(111) surface is investigated. Scanning tunneling spectroscopy (STS) indicates the presence of a two-dimensional electron gas with a binding energy of -160meV and an effective mass of -0.18m_e underneath single-layer graphene on the Ir(111) surface. Density functional calculations reveal that the STS features are predominantly due to a holelike surface resonance of the Ir(111) substrate. Nanometer-sized graphene islands act as local gates, which shift and confine the surface resonance.
%U http://arxiv.org/abs/1205.1999v1