Abstract
We study quenching of neutral excitonic optical transitions in GaAs quantum wells with increasing excess electron density. This occurs abruptly at ∼ with the emergence of the negatively charged exciton at lower transition energy. With further increasing density evolves smoothly into the Fermi-edge singularity. Polarized magneto-optical spectra confirm our assignment.
- Received 14 April 1995
DOI:https://doi.org/10.1103/PhysRevB.51.18049
©1995 American Physical Society