The interaction of polar-optical phonons with a two-dimensional electron gas

The interaction Hamiltonian for a two-dimensional electron gas with optical phonons was obtained, for an electron gas on the interface of a polar semiconductor in a metal-insulator-semiconductor device. It was found that the electron-phonon interaction is proportional to the inverse square root of the phonon wave number. The dependence of the electron-phonon coupling constant on the dielectric constant of the insulator is determined. (Auth.)