  The nonequilibrium total dielectric function lends itself to a simple and
general method for calculating the inelastic collision term in the electron
Boltzmann equation for scattering from a coupled mode system. Useful
applications include scattering from plasmon-polar phonon hybrid modes in
modulation doped semiconductor structures. This paper presents numerical
methods for including inelastic scattering at momentum-dependent hybrid phonon
frequencies in the low-field Boltzmann equation for two-dimensional electrons
coupled to bulk phonons. Results for mobility in GaAs show that the influence
of mode coupling and dynamical screening on electron scattering from polar
optical phonons is stronger for two-dimensional electrons than was previously
found for the three dimensional case.
