Many-body effects on the subband structure of n- type surface space-charge layers in InP

The effects of both the direct and the polar LO-phonon mediated electron-electron interactions are included in a calculation of the many-body effects on the subband structure of InP. The results show that the effects of exchange and correlation among surface electrons are not negligible. The dominant contribution to electronic self-energy correction comes from the direct electron-electron interaction. The threshold densities of higher-subband occupancy are determined and compared with existing models and experiments.