Abstract
The band-gap renormalization of optically excited semiconductor quantum wells due to exchange-correlation effects in the electron-hole system is studied here. The first-order self-energies for this two-component electron-hole plasma are calculated exactly within the random-phase approximation. All intersubband interactions are included fully, and they are found to make significant contributions to the self-energies and to their subband dependences. Particular attention is paid to the subband dependence of the band-gap renormalization. These calculations are made for realistic systems with finite well widths, finite barrier heights, and finite temperatures. The results are compared with recent experimental data for As/InP and GaAs/As quantum wells.
- Received 22 October 1992
DOI:https://doi.org/10.1103/PhysRevB.47.9615
©1993 American Physical Society