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Elastic properties of graphene flakes: Boundary effects and lattice vibrations

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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


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 ...


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