Effect of Raman scattering by coupled phonon-plasmon modes in magnetic fields

Raman scattering by coupled phonon-plasmon modes in high magnetic fields is considered theoretically. The calculations of the dielectric function were performed in the long-wave approximation for the semiclassical and limiting quantum magnetic fields taking into account the electron damping and intrinsic lifetime of optical phonons. Raman scattering has resonances at the frequencies of coupled modes as well as at multiples of the cyclotron frequency. The dependence of the Raman cross section on the carrier concentration is analyzed.