Hyperbolic phonon polariton emission from graphene on hBN, especially in the Zener tunneling regime, can cool graphene electronics far more efficiently than blackbody radiation.
Since RS bands are narrow ∆ω≪ Ω, the photon population is nearly constant over a RS band and given by the occupancy at mid-band nph(T,ω )≃ nph(T, Ω)
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Hyperbolic Phonon Polariton Electroluminescence as an Electronic Cooling Pathway
Hyperbolic phonon polariton emission from graphene on hBN, especially in the Zener tunneling regime, can cool graphene electronics far more efficiently than blackbody radiation.