Dynamical Screening of Hot Carriers in Semiconductors from a Coupled Molecular-Dynamics and Ensemble Monte Carlo Simulation

The dynamical screening of hot carriers in semiconductors is studied by inclusion of the electron-electron interaction directly via a molecular-dynamics approach within the more usual ensemble Monte Carlo technique. We find that the intercarrier interaction cannot be treated by a simple screened Coulomb interaction at very high electric fields, but is characterized by a complicated field- and density-dependent screening function. The details of intercarrier forces are illustrated by calculation of the pair correlation function for the nondegenerate carriers.