Bandgap formation in graphene on Ir(1 1 1) through oxidation
2013 (English)In: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 267, 74-76 p.Article in journal, Meeting abstract (Refereed) Published
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.
Place, publisher, year, edition, pages
Elsevier, 2013. Vol. 267, 74-76 p.
graphene, oxidation, band gap, adsorbates
Condensed Matter Physics
Research subject Physics with spec. in Atomic, Molecular and Condensed Matter Physics
IdentifiersURN: urn:nbn:se:uu:diva-194077DOI: 10.1016/j.apsusc.2012.07.122ISI: 000314881900018OAI: oai:DiVA.org:uu-194077DiVA: diva2:604181
11th International Conference on Atomically Controlled Surfaces, Interfaces and Nanostructures, October 3-7, 2011 St. Petersburg, Russia