Unit cell of graphene on Ru(0001): a 25 x 25 supercell with 1250 carbon atoms

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dc.creatorMartoccia, D.
dc.creatorWillmott, P. R.
dc.creatorBrugger, T.
dc.creatorBjörck, M.
dc.creatorGünther, S.
dc.creatorSchlepütz, C. M.
dc.creatorCervellino, A.
dc.creatorPauli, S. A.
dc.creatorPatterson, B. D.
dc.creatorMarchini, S.
dc.creatorWintterlin, J.
dc.creatorMoritz, W.
dc.creatorGreber, T.
dc.date2008-08-13
dc.date.accessioned2026-07-07T10:07:38Z
dc.date.available2026-07-07T10:07:38Z
dc.descriptionThe structure of a single layer of graphene on Ru(0001) has been studied using surface x-ray diffraction. A surprising superstructure has been determined, whereby 25 x 25 graphene unit cells lie on 23 x 23 unit cells of Ru. Each supercell contains 2 x 2 crystallographically inequivalent subcells caused by corrugation. Strong intensity oscillations in the superstructure rods demonstrate that the Ru substrate is also significantly corrugated down to several monolayers, and that the bonding between graphene and Ru is strong and cannot be caused by van der Waals bonds. Charge transfer from the Ru substrate to the graphene expands and weakens the C-C bonds, which helps accommodate the in-plane tensile stress. The elucidation of this superstructure provides important information in the potential application of graphene as a template for nanocluster arrays.
dc.description9 pages, 3 figures, paper submitted to peer reviewed journal
dc.identifierhttps://arxiv.org/abs/0808.1853
dc.identifierhttp://arxiv.org/abs/0808.1853
dc.identifierPhys. Rev. Lett. 101, 126102 (2008)
dc.identifierdoi:10.1103/PhysRevLett.101.126102
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/170708
dc.subjectMaterials Science
dc.titleUnit cell of graphene on Ru(0001): a 25 x 25 supercell with 1250 carbon atoms
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