Abstract
It has been shown that the inclusion of an additional short-range potential in the repulsion energy of neighboring atoms allows one to satisfactorily describe the frequency of the phonon doublet at the Γ point for atomic vibrations in the plane of the graphene sheet and to calculate the corresponding Grüneisen coefficient. The results obtained are compared with those derived by other authors.
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Original Russian Text © S.Yu. Davydov, 2010, published in Fizika Tverdogo Tela, 2010, Vol. 52, No. 9, pp. 1815–1818.
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Davydov, S.Y. On the force constants of graphene. Phys. Solid State 52, 1947–1951 (2010). https://doi.org/10.1134/S1063783410090271
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DOI: https://doi.org/10.1134/S1063783410090271