The coupled hole-phonon system and minority-electron transport in p-GaAs

Abstract

We present a Monte-Carlo study of minority-electron transport in p-GaAs including dynamic screening and plasmon-phonon couping using a phenomenologically damped quasi-nonequilibrium two-band dielectric function. Calculated mode spectra contain the acoustic and optical plasmons of the two-component hole plasma, and suggest that despite the role of the acoustic plasmon, plasma oscillations do not extend to wave vectors as large as the inverse screening length. Furthermore, we find no evidence of the drag effect. For heavy dopings, calculated high-field minority-electron drift velocities are significantly larger than experimental values, indicating that further work is required to achieve a true understanding of minority-electron transport.