Abstract
We investigate the phonon thermal conductance of graphene regarding the graphene sheet as the large-width limit of graphene strips in the ballistic limit. We find that the thermal conductance depends weakly on the direction angle of the thermal flux periodically with period . It is further shown that the nature of this directional dependence is the directional dependence of group velocities of the phonon modes in the graphene, originating from the symmetry in the honeycomb structure. By breaking the symmetry in graphene, we see more obvious anisotropic effect in the thermal conductance as demonstrated by dimerite.
4 More- Received 2 February 2009
DOI:https://doi.org/10.1103/PhysRevB.79.205418
©2009 American Physical Society