Moir{\'e} patterns as a probe of interplanar interactions: graphene on h-BN
| Autor: | van Wijk, M. M., Schuring, A., Katsnelson, M. I., Fasolino, A. |
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| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | Phys. Rev. Lett. 113, 135504 (2014) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevLett.113.135504 |
| Popis: | By atomistic modeling of moir{\'e} patterns of graphene on a substrate with a small lattice mismatch, we find qualitatively different strain distributions for small and large misorientation angles, corresponding to the commensurate-incommensurate transition recently observed in graphene on hexagonal BN. We find that the ratio of C-N and C-B interactions is the main parameter determining the different bond lengths in the center and edges of the moir{\'e} pattern. Agreement with experimental data is obtained only by assuming that the C-B interactions are at least twice weaker than the C-N interactions. The correspondence between the strain distribution in the nanoscale moir{\'e} pattern and the potential energy surface at the atomic scale found in our calculations, makes the moir{\'e} pattern a tool to study details of dispersive forces in van der Waals heterostructures. Comment: 5 pages, 3 figures |
| Databáze: | arXiv |
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