Session A25: Focus Session: Graphene I: Electronic Properties

8:00 AM–11:00 AM, Monday, March 16, 2009
Room: 327

Sponsoring Unit: DMP
Chair: Jules Carbotte, McMaster University

Abstract ID: BAPS.2009.MAR.A25.11

Abstract: A25.00011 : Fermi surface of graphene on Ru(0001)

10:24 AM–10:36 AM

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  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)

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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