Plasma waves in two-dimensional conductors with impurity electron states

The dispersion relation and the damping of plasma waves in two-dimensional conductors are calculated under the condition of localization of electrons by impurity atoms. It has been shown that localization of electrons decreases plasma-wave Irequency as well as causing their damping when the frequency exceeds some threshold value. The data obtained resulted in an explanation of experiments on electromagnetic wave absorption in inversion layers of silicon and silicon dioxide interfaces.