The Structure and Local Variations of the Graphene Moiré on Ir(111)
arXiv:1310.7772 · doi:10.1103/PhysRevB.88.201406
Abstract
We have studied the incommensurate moiré structure of epitaxial graphene grown on iridium(111) by dynamic low energy electron diffraction [LEED-I(V)] and non-contact atomic force microscopy (AFM) with a CO terminated tip. Our LEED-I(V) results yield the average positions of all the atoms in the surface unit cell and are in qualitative agreement with the structure obtained from density functional theory (DFT). The AFM experiments reveal local variations of the moiré structure: the corrugation varies smoothly over several moiré unit cells between 42 and 56 pm. We attribute these variations to the varying registry between the moiré symmetry sites and the underlying substrate. We also observe isolated outliers, where the moiré top sites can be offset by an additional 10 pm. This study demonstrates that AFM imaging can be used to directly yield the local surface topography with pm accuracy even on incommensurate 2D structures with varying chemical reactivity.
References in corpus (13)
- Hofstadter's butterfly in moire superlattices: A fractal quantum Hall effect
- Cloning of Dirac fermions in graphene superlattices
- STM Spectroscopy of ultra-flat graphene on hexagonal boron nitride
- Emergence of Superlattice Dirac Points in Graphene on Hexagonal Boron Nitride
- Evidence for Dirac Fermions in a honeycomb lattice based on silicon
- 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
- In situ observation of stress relaxation in epitaxial graphene
- Electronic structure, imaging contrast and chemical reactivity of graphene moiré on metals
- Topographic and electronic contrast of the graphene moiré on Ir(111) probed by scanning tunneling microscopy and non-contact atomic force microscopy
- Local deformations and incommensurability of high quality epitaxial graphene on a weakly interacting transition metal
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- Epitaxial hexagonal boron nitride on Ir(111): A work function template
- Graphene growth and properties on metal substrates
- Understanding the origin of band gap formation in graphene on metals: graphene on Cu/Ir(111)
- Universal classification of twisted, strained and sheared graphene moiré superlattices
- Rotation misorientated graphene moire superlattices on Cu(111): classical molecular dynamics simulations and scanning tunneling microscopy studies
- Scanning probe microscopy and spectroscopy of graphene on metals
- Multichannel scanning probe microscopy and spectroscopy of graphene moire structures
- Topography of the graphene/Ir(111) moir{é} studied by surface x-ray diffraction
- Electronic Characterization of a Charge-Transfer Complex Monolayer on Graphene
- Benchmarking van der Waals-treated DFT: The case of hexagonal boron nitride and graphene on Ir(111)
- Playing graphene nanodrums: force spectroscopy of graphene on Ru(0001)
- Time-lapsed graphene moiré superlattice on Cu(111)
- How transparent is graphene? A surface science perspective on remote epitaxy
- Atomic and mesoscopic structure of Dy-based surface alloys on noble metals
- Spin and Charge Control of Topological End States in Chiral Graphene Nanoribbons on a 2D Ferromagnet
- Elastic properties of moiré lattices in epitaxial two-dimensional materials
- Atomic bonding and binding energy of two-dimensional Bi/Li(110) heterojunctions via BOLS and BB model