ABSTRACT
Experimental data on the electronic conductivity of solids where the mobility of the electrons is sufficiently high are well described by a theory based on the Boltzmann kinetic equation. The localization of the electron in one of these states may stabilize this distorted configuration of the atoms of the crystal lattice due to the interaction of the atoms with the electric field created by the electron. The inertia-less polarization is the part of the medium polarization screening a high frequency external field applied to the system with a frequency higher than the frequency of the motion of the autolocalized electron. An important difference between the surface polarons and the polarons in the bulk of the crystal is that the interaction of the electron both with bulk and surface optical phonons must be taken into account for the surface polarons. The influence of the crystal surface on the polaron properties is most pronounced in thin dielectric films.
