ZhETF, Vol. 132,
No. 2,
p. 446 (August 2007)
(English translation - JETP,
Vol. 105, No. 2,
p. 397,
August 2007
available online at www.springer.com
)
PHONON DISPERSION IN GRAPHENE
Falkovsky L.A.
Received: February 19, 2007
PACS: 63.20.Dj, 81.05.Uw, 71.15.Mb
Taking the constraints imposed by the lattice symmetry into account, we calculate the phonon dispersion for graphene with interactions between the first and second nearest neighbors. We show that only five force constants give a very good fitting to the elastic constants and phonon frequencies observed in graphite.
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