Pyroelectric origin of the carrier density modulation at graphene-ferroelectric interface

Using continuous media theory approach we study the static and high-frequency heat dissipation in multi-layer graphene on a ferroelectric. Performed calculations have proved that the pyroelectric effect can modify essentially the free carrier density at the graphene-ferroelectric interface and consequently the conductivity of multi-layer graphene channel. Pyroelectric mechanism can be critical for understanding of the complex thermal and electrical processes taking place across and along graphene-ferroelectric interfaces at terahertz frequencies.