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We discuss the non-radiative heat transfer in non-equilibrium double layergraphene system. We show that at the neutrality point the heat exchange isdominated by the inter-layer plasmon modes and derive analytic expressions forthe heat current as a function of temperature and the interlayer separation.These results show that for a range of low temperatures the two graphene layersare much more efficient heat exchanger than conventional metals. The physicalreason behind this phenomenon is the presence of inter-band excitations with alarge energy, and a small momentum in graphene spectrum. Plasmonic mechanism ofthe heat transfer is sharply suppressed by electrostatic doping. This allowsfor tuning of the heat exchange by a small applied voltage between the twolayers.

Plasmonic Tuning of the Near Field Heat Transfer in Double Layer Graphene