The underestimated thermal conductivity of graphene in thermal-bridge measurement: A computational study
CX Yu and G Zhang, JOURNAL OF APPLIED PHYSICS, 113, 214304 (2013).
The effect of substrate coupling on thermal conductivity of graphene is studied by using molecular dynamic simulations. It was found that heat flux along real suspended single-layer graphene is only 40% with respect to that in the ideal suspended single-layer graphene, due to remarkable temperature jump and thermal contact resistance at the contact region. With the strength of inter-layer (or graphene-substrate) interaction increases, the temperature jump increases and leads to further reduction in heat flux and the estimated thermal conductivity. Our results give a reasonable explanation to the underestimated thermal conductivity of graphene in thermal-bridge measurement. (C) 2013 AIP Publishing LLC.
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