Graphene on Ru(0001): Evidence for two graphene band structures

High-resolution photoemission illustrates that the band structure of graphene on Ru(0001) exhibits a well-defined splitting. This splitting is largest with the graphene directly on the Ru(0001) substrate, whereas with a chemisorbed oxygen spacer layer between the graphene and the metal substrate, th...

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Bibliographic Details
Published in:Physical review. B, Condensed matter and materials physics Condensed matter and materials physics, 2012-05, Vol.85 (19), Article 195405
Main Authors: Katsiev, Khabibulakh, Losovyj, Yaroslav, Zhou, Zihao, Vescovo, Elio, Liu, Li, Dowben, Peter A., Goodman, D. Wayne
Format: Article
Language:English
Subjects:
Band structure of solids
Condensed matter
Graphene
MATERIALS SCIENCE
national synchrotron light source
OXYGEN
PHOTOEMISSION
Screening
SPACERS
Spin-orbit interactions
Splitting
substrate
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Summary:High-resolution photoemission illustrates that the band structure of graphene on Ru(0001) exhibits a well-defined splitting. This splitting is largest with the graphene directly on the Ru(0001) substrate, whereas with a chemisorbed oxygen spacer layer between the graphene and the metal substrate, this splitting is considerably reduced. This splitting is attributed to a combination of chemical interactions between graphene and Ru(0001) and to screening of the former by the latter, not spin-orbit coupling.
ISSN:1098-0121
1550-235X
DOI:10.1103/PhysRevB.85.195405