Towards Phonon Spectrum of Graphene

Details Towards Phonon Spectrum of Graphene Towards Phonon Spectrum of Graphene

2007-10-10

arxiv.org/abs/0710.2077v2

Physics

Condensed Matter

Materials Science

14 pages, 18 figures

Scientific paper

It is shown that the nearest neighbor coupling between the carbon atoms is not enough to reproduce the phonon spectrum as observed in graphene, the second neighbor force constant is essential. For completeness we have rederived the phonon spectrum of one dimensional chains and two dimensional lattices like square lattice and triangular lattice with nearest and next nearest neighbor coupling among the atoms. This article is essentially an account of the technical details of a review talk on phonon spectrum of graphene presented at Institute of Physics.

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