ZhETF, Vol. 141,
No. 5,
p. 924 (May 2012)
(English translation - JETP,
Vol. 114, No. 5,
p. 805,
May 2012
available online at www.springer.com
)
PHONON DISPERSION OF GRAPHENE REVISITED
Sahoo R., Mishra R.R.
Received: August 16, 2011
The phonon dispersion of graphene is derived by using a simple mass spring model and considering up to the first, second, third, and fourth nearest-neighbor interactions. The results obtained from different nearest-neighbor interactions are compared and it is shown that the k2 dependence for the out-of-plane transverse acoustic mode obtained in other sophisticated methods as well as experiment occurs only after considering the fourth nearest-neighbor interaction.
|
|
Golden Pages
DJVU (109.5K)
PDF (383.7K)