Topography of the graphene/Ir(111) moir{é} studied by surface x-ray diffraction

Abstract

The structure of a graphene monolayer on Ir(111) has been investigated {\it in situ} in the growth chamber by surface x-ray diffraction including the specular rod, which allows disentangling the effect of the sample roughness from that of the nanorippling of graphene and iridium along the moir{é}-like pattern between graphene and Ir(111). Accordingly we are able to provide precise estimates of the undulation associated with this nanorippling, which is small in this weakly interacting graphene/metal system and thus proved difficult to assess in the past. The nanoripplings of graphene and iridium are found in phase, i.e. the in-plane position of their height maxima coincide, but the amplitude of the height modulation is much larger for graphene (\(0.379 \pm 0.044\) Å) than, {\it e.g.}, for the topmost Ir layer (\(0.017 \pm 0.002\) Å). The average graphene-Ir distance is found to be \(3.38 \pm 0.04\) Å.

References in corpus (13)

• Periodically rippled graphene: growth and spatially resolved electronic structure
• Two Dimensional Ir-Cluster Lattices on Moiré of Graphene with Ir(111)
• Dirac Cones and Minigaps for Graphene on Ir(111)
• Graphene on Ir(111): Physisorption with chemical modulation
• Unit cell of graphene on Ru(0001): a 25 x 25 supercell with 1250 carbon atoms
• Growth of Epitaxial Graphene: Theory and Experiment
• Selecting a single orientation for millimeter sized graphene sheets
• Induced Superconductivity in Graphene Grown on Rhenium
• Graphene on Ru(0001): A corrugated and chiral structure
• The Structure and Local Variations of the Graphene Moiré on Ir(111)
• Topographic and electronic contrast of the graphene moiré on Ir(111) probed by scanning tunneling microscopy and non-contact atomic force microscopy
• Multichannel scanning probe microscopy and spectroscopy of graphene moire structures
• Local deformations and incommensurability of high quality epitaxial graphene on a weakly interacting transition metal

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• In Situ Characterisation of Graphene Growth on Liquid Copper-Gallium Alloys: Paving the Path for Cost-Effective Synthesis
• The influence of Gaussian strain on sublattice selectivity of impurities in graphene