  The Nernst effect is a fundamental thermoelectric conversion phenomenon that
was deemed to be possible only in systems with magnetic field or magnetization.
In this work, we propose a novel dynamical chiral Nernst effect that can appear
in two-dimensional van der Waals materials with chiral structural symmetry in
the absence of any magnetic degree of freedom. This unconventional effect is
triggered by time variation of an out-of-plane electric field, and has an
intrinsic quantum geometric origin linked to not only the intralayer
center-of-mass motion but also the interlayer coherence of electronic states.
We demonstrate the effect in twisted homobilayer and homotrilayer transition
metal dichalcogenides, where the strong twisted interlayer coupling leads to
sizable intrinsic Nernst conductivities well within the experimental capacity.
This work suggests a new route for electric control of thermoelectric
conversion.
