Energy transfer rate in double-layer graphene systems: Linear regime

We theoretically investigate the energy transfer phenomenon in a double-layer graphene (DLG) system. We use the balance equation approach in linear regime and random phase approximation screening function to obtain energy transfer rates at different electron temperatures, densities and interlayer spacings. We find that the rate of energy transfer in the DLG is qualitatively similar to that obtained in the double-layer two-dimensional electron gas but its values are an order of magnitude greater. Also, at large electron temperature differences between two graphene layers, the electron density dependence of energy transfer is significantly different, particularly in case of unequal electron densities.

► We calculate energy transfer rate in DLG system using balance equation approach. ► The energy transfer rate in DLG has the same behavior as in double-layer 2DEG. ► The calculated values for DLG are an order of magnitude larger. ► In DLG, the energy transfer rate is more sensitive to density imbalance.