Tuning thermometric transport in Floquet Topological insulator

We study thermoelectric transport in Floquet topological insulators under the application of circularly polarized off-resonant light. We derive analytical expressions for the band structure, orbital magnetization, and the thermal and Nernst conductivities. Reversing the light polarization from right to left leads to an exchange of the conduction and valence bands of the symmetric and antisymmetric surface states and to a sign change in magnetization, Nernst and thermal conductivities. Varying the sample thickness or amplitude of light leads to a strong enhancement of magnetization and Nernst conductivity. These effects are accessible to experiments, open the possibility for selective, state-exchanged excitations under light and the conversion of heat to electric energy.