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Contact mechanics of graphene-covered metal surfaces

: Klemenz, A.; Gola, A.; Moseler, M.; Pastewka L.


Applied Physics Letters 112 (2018), No.6, Art. 061601, 12 pp.
ISSN: 0003-6951 (Print)
ISSN: 1077-3118
ISSN: 1931-9401 (online)
Bundesministerium für Bildung und Forschung BMBF
Deutsche Forschungsgemeinschaft DFG
PA 2023/2
Journal Article
Fraunhofer IWM ()

We carry out molecular statics simulations of the indentation of bare and graphene-covered Pt (111) surfaces with smooth and rough indenters of radius 1.5 to 10 nm. Our simulations show that the plastic yield of bare surfaces strongly depends on atomic-scale indenter roughness such as terraces or amorphous disorder. Covering surfaces with graphene regularizes this response to the results obtained for ideally smooth indenters. Our results suggest that graphene monolayers and other 2D materials mitigate the effect of roughness, which could be exploited to improve the fidelity of experiments that probe the mechanical properties of interfaces.