Phonon dispersion in graphene
Taking into account the constraints imposed by the lattice symmetry, 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.
Soviet Journal of Experimental and Theoretical Physics
- Pub Date:
- August 2007
- Condensed Matter - Mesoscale and Nanoscale Physics;
- Condensed Matter - Soft Condensed Matter
- 6 pages, 4 figures