  Recently, a method of ultrafast polarization switching in ferroelectrics has
been suggested. The basic idea of the method is to employ the effect of
self-acceleration of polarization dynamics due to a resonator feedback field.
This is the idea of principle whose efficiency is demonstrated by an Ising-type
model in a transverse field. Of course, the practical realization of the method
requires the choice of appropriate materials, which is a separate problem. For
example, the standard order-disorder ferroelectrics with spatially symmetric
double-well potentials cannot be used for this purpose, since, because of the
symmetry, they lack the transverse polarization. However, ferroelectrics with
asymmetric potentials, possessing this polarization, can be used. Moreover, if
the potential asymmetry, hence the transverse polarization, could be regulated,
e.g., by shear stress or shear strain, this could provide a tool for governing
the process of polarization switching.
