Calculation of electron-exciton scattering cross sections in semiconducting quantum wells

摘要

Abstract: We have theoretically investigated the scattering of excitons by free electrons in a semiconducting quantum well of finite width. The elastic and ionization scattering cross sections have been calculated as a function of the well width using the Born approximation for scattering of excitons by electrons. The behavior of the scattering cross section as a function of energy of relative motion of the electron and the exciton is similar to that previously obtained from 2D calculations for narrow wells. The cross section increases as the well width increases and the relative wave vector of the electron at which the total cross section is a maximum shift to lower values as the well width increases.!10