1303.2390 (S. Yiğen et al.)

Electronic Thermal Conductivity Measurements in Intrinsic Graphene    [PDF]

S. Yiğen, V. Tayari, J. O. Island, J. M. Porter, A. R. Champagne

The electronic thermal conductivity of graphene is of fundamental interest and can play an important role in the performance of graphene nano-scale devices. We measure the electronic thermal conductivity, $K_{e}$, in suspended graphene in the nearly intrinsic regime over a temperature range of 20 to 300 K. We present a method to measure $K_{e}$ using two-point DC electron transport at low bias voltages, where the electron and lattice temperatures are decoupled. We find $K_e$ ranging from 0.5 to 11 W/m.K over the studied temperature range. The data is consistent with a simple model in which heat is carried by quasiparticles with the same mean free-path and velocity as graphene's charge carriers.

View original: http://arxiv.org/abs/1303.2390