Quantitative LEED Studies on Graphene
- Resource Type
- Authors
- Katariina Pussi; Wolfgang Moritz; Sebastian Günther
- Source
- Subject
- Materials science
Condensed matter physics
law
Graphene
Modulation
Density functional theory
Substrate (electronics)
Moiré pattern
Scanning tunneling microscope
Fourier series
Symmetry (physics)
law.invention
- Language
Single well-ordered graphene layers can be prepared on a number of metal surfaces. The structures exhibit in most cases, a Moire pattern in the scanning tunneling microscopy images with large modulation periods. The modulation arises from the lattice mismatch and the interaction with the substrate. A few structures have been analyzed by LEED. The results are reported and compared to the data from X-ray measurements and density functional theory calculations. The description of the 2-D modulation functions by Fourier coefficients and the restrictions due to the p3m1 symmetry of the structure is shortly summarized.