  We consider the near-field radiative energy transfer between two separated
parallel plates: graphene supported by a substrate and a magneto-optic medium.
We first study the scenario in which the two plates have the same temperature.
An electric current through the graphene gives rise to nonequilibrium
fluctuations and induces energy transfer. Both the magnitude and direction of
the energy flux can be controlled by the electric current and an in-plane
magnetic field in the magneto-optic medium. This is due to the interplay
between the nonreciprocal photon occupation number in the graphene and
nonreciprocal surface modes in the magneto-optic plate. Furthermore, we report
that a tunable thermoelectric current can be generated in the graphene in the
presence of a temperature difference between the two plates.
