The Non-Equilibrium Electron Gas as a Ferroelectric

The results of calculation of current in a lateral superlattice by electron scattering on the optical phonons are presented. It is shown that under the action of a high applied electric field (E_x) directed along one of the crystal symmetry axes the spontaneous appearance of a transverse electric field (E_y) is possible. The field E_y as a function of temperature proves to show the features of spontaneous polarization in ferroelectrics. The Curie temperature is defined by the value of E_x.