Theory of Light Scattering from Magnetoacoustic Waves in Solid-State Plasmas

Recently, it has been pointed out that a single-component degenerate plasma can support acoustic plasma waves when it is placed in a magnetic field. This paper considers the possibility of observing such waves via light scattering. The light-scattering cross section for the simplest of these waves is calculated. Such waves are essentially spin-density oscillations; light couples to them via the spin-orbit interaction. $n$-type InSb is a particularly promising material for such experiments.