2013/03/31 by S. Yiğen, V. Tayari, J. O. Island +2 · 1 citation
Physics and Astronomy · #cond-mat.mes-hall #cond-mat.mtrl-sci
paper · pdf · doi:10.1103/physrevb.87.241411
published as Physical Review B 87, 241411(R) (2013) · Supplemental Online Material available at: http://physics.concordia.ca/faculty/alex/Yigen_Champagne_SM.pdf
arxiv created 2013/06/27 · arxiv updated 2013/07/01
The electronic thermal conductivity of graphene and 2D Dirac materials is of fundamental interest and can play an important role in the performance of nano-scale devices. We report the electronic thermal conductivity, Ke, in suspended graphene in the nearly intrinsic regime over a temperature range of 20 to 300 K. We present a method to extract Ke using two-point DC electron transport at low bias voltages, where the electron and lattice temperatures are decoupled. We find Ke ranging from 0.5 to 11 W/m.K over the studied temperature range. The data are consistent with a model in which heat is carried by quasiparticles with the same mean free-path and velocity as graphene's charge carriers.