Comparison of electronic structure and template function of single-layer graphene and a hexagonal boron nitride nanomesh on Ru(0001)

Thomas Brugger, Sebastian Günther, Bin Wang, J. Hugo Dil, Marie Laure Bocquet, Jürg Osterwalder, Joost Wintterlin, Thomas Greber

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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 s p2 hybridized networks and display a π band gap at the K̄ point of their 1×1 Brillouin zone. In contrast to h-BN/Ru (0001), g/Ru (0001) has a distinct Fermi surface. Together with the band structure measurements this indicates that 0.1e per 1×1 unit cell are transferred from the Ru substrate to the graphene. Photoemission from adsorbed xenon on g/Ru (0001) identifies two Xe5 p1/2 lines, separated by 240 meV, which reveals a corrugated electrostatic potential energy surface like on h-BN/Rh (111). These two Xe species are related to the topography of the template and have different desorption energies.

Original languageEnglish
Article number045407
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume79
Issue number4
DOIs
StatePublished - 5 Jan 2009
Externally publishedYes

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