19 September 2011 Phonon dispersion relation and phonon thermal conductivity in trilayer graphene at low temperatures
Author Affiliations +
Abstract
In this work, phonon dispersion relation of trilayer graphene with ABA stacking has been calculated by using forceconstant model. In our calculation we have considered fifth nearest neighbors in plane of graphene and the interaction between the nearest layers. By using the calculated phonon dispersion relation, phonon thermal conductivity of trilayer graphene is investigated by Landaur theory at low temperatures. In force constant model, atoms are considered as a point masses that move according to the classical mechanics laws. By formation of dynamical matrix and solving the secular equation detD(k)=0 the eigen frequencies can be achieved. It can be seen that the degeneracy of the lowest acoustic branch is splited into the three branches near the Briloan zone for trilayer graphene, which is due to weak van der waals interaction between two layers. In addition, the phonon thermal conductivity increases by raising the number of layers.
© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Edris Faizabadi, Fateme Karbalaii, "Phonon dispersion relation and phonon thermal conductivity in trilayer graphene at low temperatures", Proc. SPIE 8101, Carbon Nanotubes, Graphene, and Associated Devices IV, 81010S (19 September 2011); doi: 10.1117/12.893068; https://doi.org/10.1117/12.893068
PROCEEDINGS
7 PAGES


SHARE
Back to Top