Abstract
The photoluminescence of a highly homogeneous quasi-two-dimensional electron-hole plasma in undoped lattice-matched As/InP quantum wells has been investigated up to densities of 4× under magnetic fields H≤10 T. The band-gap renormalization due to many-body interactions is found to be significantly larger for the =1 than the =2 subbands. We observe an energy-dependent renormalization of the reduced effective mass for carrier concentrations in the (1–4)× range. The renormalization is ∼10% near the band bottom for a kinetic energy ∼50 meV while it reaches 25% in the intermediate range. This variation is attributed to the influence of the light-hole–heavy-hole subband-splitting renormalization.
- Received 30 May 1991
DOI:https://doi.org/10.1103/PhysRevB.44.10680
©1991 American Physical Society