Theory of electronic Brillouin scattering in metals
Falkovsky L. A., Mishchenko E. G.
The theory of Brillouin light scattering in metals by conduction electrons which interact with acoustic phonons and impurities is developed. Effects of the surface and the Coulomb interaction of carriers are taken into account. The self-consistent electron-phonon interaction changes the electron-hole contribution—the wide relaxation continuum appears with the temperature-dependent collision frequency. The sharp peaks in the cross section arise due to excitation of the bulk longitudinal phonons, the bulk transverse phonons, and the surface Rayleigh phonons. The contribution of the bulk phonons reflected by the surface has the form of a narrow continuum with a sharp maximum for the slipping phonons.