Fermi surface of graphene on Ru(0001)

ORAL

Abstract

The structure of a single layer graphene on Ru(0001) is compared with that of a single layer hexagonal boron nitride nanomesh on Ru(0001). Both are corrugated sp$^2$ hybridized networks and display a $\pi$-band gap at the $\overline{\rm{K}}$ point of their $1\times1$ Brillouin zone. In contrast to $h$-BN/Ru(0001), g/Ru(0001) has a distinct Fermi surface which indicates that 0.1 electrons per $1\times1$ unit cell are transferred from the Ru substrate to the graphene. Photoemission from adsorbed xenon on g/Ru(0001) identifies two distinct Xe 5p$_{1/2}$ lines, separated by 240 meV, which reveals a corrugated electrostatic potential energy surface like on $h$-BN/Rh(111) [1]. These two Xe species are related to the topography of the template and have different desorption energies.\\[4pt] [1] H. Dil, J. Lobo-Checa, R. Laskowski, P. Blaha, S. Berner, J. Osterwalder, and T.Greber, Science \textbf{319}, 1824 (2008).

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Authors

  • Thomas Brugger

  • Hugo Dil

  • J\"{u}rg Osterwalder

  • Thomas Greber

    • Physik-Institut, Universitaet Zuerich, Winterthurerstrasse 190, CH-8057 Zuerich, Switzerland

  • Bin Wang

  • Marie-Laure Bocquet

    • Universite de Lyon, Laboratoire de Chimie, Ecole Normale Superieure de Lyon, CNRS, France

  • Sebastian G\"{u}nther

  • Joost Wintterlin

    • Department Chemie, Ludwig-Maximilian Universitaet, Butenandtstrasse 5-13, D-81377 Muenchen, Germany