  Coherent charge and heat transport through periodically driven nanodevices
provide a platform for studying thermoelectric effects on the nanoscale. Here
we study a junction comprising a quantum dot connected to two fermionic
terminals by two weak links. An AC electric field induces time-dependent
spin-orbit interaction in the weak links. We show that this setup supports DC
charge and heat currents and that thermoelectric performance can be improved,
as reflected by the effect of the spin-orbit coupling on the Seebeck
coefficient and the electronic thermal conductance. Our analysis is based on
the nonequilibrium Keldysh Green's function formalism in the time domain and
reveals an interesting distribution of the power supply from the AC source
among the various components of the device, apparently not realized before.
