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Structural determination of bilayer graphene on SiC(0001) using synchrotron radiation photoelectron diffraction
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Razado-Colambo, I., Avila, J., Vignaud, D., Godey, S., Wallart, X., Woodruff, D. P. and Asensio, M. C. (2018) Structural determination of bilayer graphene on SiC(0001) using synchrotron radiation photoelectron diffraction. Scientific Reports, 8 (1). 10190. doi:10.1038/s41598-018-28402-0 ISSN 2045-2322.
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Official URL: http://dx.doi.org/10.1038/s41598-018-28402-0
Abstract
In recent years there has been growing interest in the electronic properties of 'few layer' graphene films. Twisted layers, different stacking and register with the substrate result in remarkable unconventional couplings. These distinctive electronic behaviours have been attributed to structural differences, even if only a few structural determinations are available. Here we report the results of a structural study of bilayer graphene on the Si-terminated SiC(0001) surface, investigated using synchrotron radiation-based photoelectron diffraction and complemented by angle-resolved photoemission mapping of the electronic valence bands. Photoelectron diffraction angular distributions of the graphene C 1s component have been measured at different kinetic energies and compared with the results of multiple scattering simulations for model structures. The results confirm that bilayer graphene on SiC(0001) has a layer spacing of 3.48 Å and an AB (Bernal) stacking, with a distance between the C buffer layer and the first graphene layer of 3.24 Å. Our work generalises the use of a versatile and precise diffraction method capable to shed light on the structure of low-dimensional materials.
Item Type: | Journal Article | |||||||||||||||
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Subjects: | Q Science > QC Physics T Technology > TP Chemical technology |
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | |||||||||||||||
SWORD Depositor: | Library Publications Router | |||||||||||||||
Library of Congress Subject Headings (LCSH): | Graphene, Silicon carbide, Thin films, Synchrotron radiation | |||||||||||||||
Journal or Publication Title: | Scientific Reports | |||||||||||||||
Publisher: | Nature Publishing Group | |||||||||||||||
ISSN: | 2045-2322 | |||||||||||||||
Official Date: | 5 July 2018 | |||||||||||||||
Dates: |
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Volume: | 8 | |||||||||||||||
Number: | 1 | |||||||||||||||
Article Number: | 10190 | |||||||||||||||
DOI: | 10.1038/s41598-018-28402-0 | |||||||||||||||
Status: | Peer Reviewed | |||||||||||||||
Publication Status: | Published | |||||||||||||||
Access rights to Published version: | Open Access (Creative Commons) | |||||||||||||||
Date of first compliant deposit: | 15 October 2018 | |||||||||||||||
Date of first compliant Open Access: | 15 October 2018 | |||||||||||||||
RIOXX Funder/Project Grant: |
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