title: Restoring a nearly free-standing character of graphene on Ru(0001) by oxygen intercalation.
abstract: Realization of a free-standing graphene is always a demanding task. Here we use scanning probe microscopy and spectroscopy to study the crystallographic structure and electronic properties of the uniform nearly free-standing graphene layers obtained by intercalation of oxygen monolayer in the "strongly" bonded graphene/Ru(0001) interface. Spectroscopic data show that such graphene layer is heavily p-doped with the Dirac point located at 552 meV above the Fermi level. Experimental data are understood within density-functional theory approach and the observed effects are in good agreement with the theoretical data.
authors: Humboldt-Universität zu Berlin, Institut für Chemie, 10099 Berlin, Germany.
authors: Elena
authors: E
authors: Voloshina
authors: SPECS Surface Nano Analysis GmbH, Voltastraße 5, 13355 Berlin, Germany.
authors: Nikolai
authors: N
authors: Berdunov
authors: SPECS Surface Nano Analysis GmbH, Voltastraße 5, 13355 Berlin, Germany.
authors: Yuriy
authors: Y
authors: Dedkov