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Optimized Fabrication Procedure for High-Quality Graphene-based Moiré Superlattice Devices
Published on: July 11, 2025
Structure determination of the coincidence phase of graphene on Ru(0001)
W Moritz1, B Wang, M-L Bocquet
1Department für Geo- und Umweltwissenschaften, Ludwig-Maximilians-Universität München, Theresienstr. 41, 80333 Munich, Germany. w.Moritz@lrz.uni-muenchen.de
Abstract:
The structure of the commensurate (23x23) phase of graphene on Ru(0001) has been analyzed by quantitative low-energy electron diffraction (LEED)-I(V) analysis and density-functional theory calculations. The I(V) analysis uses Fourier components as fitting parameters to determine the vertical corrugation and the lateral relaxation of graphene and the top Ru layers. Graphene is shown to be strongly corrugated by 1.5 A with a minimum C-Ru distance of 2.1 A. Additionally, lateral displacements of C atoms and a significant buckling in the underlying Ru layers are observed, indicative for strong local C-Ru interactions.
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