Elastic properties of graphene flakes: Boundary effects and lattice vibrations

URN to cite this document:: urn:nbn:de:bvb:355-epub-461992
DOI to cite this document:: 10.5283/epub.46199

Bera, S. ; Arnold, A. ; Evers, Ferdinand

; Narayanan, R. ; Wölfle, P.

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Date of publication of this fulltext: 02 Jul 2021 11:06

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Abstract

We present a phenomenological theory together with explicit calculations of the electronic ground-state energy, the surface contribution, and the elastic constants (“Lamé parameters,” i.e., Poisson ratio, Young’s modulus) of graphene flakes on the level of the density-functional theory employing different standard functionals. We observe that the Lamé parameters in small flakes can differ from ...