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Bandgap formation in graphene on Ir(111) through oxidation

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Author

Summary, in English

A graphene monolayer on single crystal Ir(111) has been studied using angle-resolved photoemission spectroscopy (ARPES) before and after exposure to atomic oxygen. With increasing oxygen coverage the Dirac cone, centered on the K-point of the Brillouin zone, broadens and finally transforms to a parabolic rather than linear feature, introducing a pronounced energy bandgap at the Fermi level. The opening of a bandgap of at least 0.35 eV was observed at the oxygen exposure close to the saturation coverage. (C) 2012 Elsevier B. V. All rights reserved.

Department/s

Publishing year

2013

Language

English

Pages

74-76

Publication/Series

Applied Surface Science

Volume

267

Document type

Journal article

Publisher

Elsevier

Topic

  • Natural Sciences
  • Physical Sciences

Keywords

  • Graphene
  • Oxidation
  • Electronic structure: photoelectron spectroscopy
  • Adsorbates: binding site geometry
  • Electronic structure

Status

Published

ISBN/ISSN/Other

  • ISSN: 1873-5584