Dynamical thermal conductivity of AA-stacked biased and doped bilayer graphene: Green’s function approach

International Conference and Exhibition on Mesoscopic & Condensed Matter Physics

June 22-24, 2015 Boston, USA

Rezania, Hamed1 and Yarmohammadi Mohsen2

1University of Razi, Iran 2Institute for Advanced Studies in Basic Sciences (IASBS), Iran

Posters-Accepted Abstracts: J Material Sci Eng

Abstract :

We investigate the dynamical thermal conductivity (�?º) of clean AA-stacked bilayer graphene sheets as a function of frequency for doping due to charging and also the effect of adding a bias across the layers. Recently increasing importance of thermal properties of materials is explained both by practical needs and fundamental science. Heat removal has become a crucial issue for continuing progress in electronic industry owing to increased levels of dissipated power. Thermal properties of materials change when they are structured on a nanometer scale. Graphene transistors and interconnects benefit from the high in-plane thermal conductivity, up to a certain channel length. According to our results, there is a maximum value in the plot of �?º versus bias potential V for various temperatures T and frequencies Ï�? and a slight decreasing for different chemical potential �?¼. Also we have obtained the temperature dependence of �?º for different frequencies, chemical and bias potentials, that we saw a dramatically decrease in all of them. The plot of �?º versus chemical potential leads to a minimum value for �?º at �?¼ > t|| (in-plane hopping) for different T and V.

Biography :

Email: m.yarmohammadi69@gmail.com