Abstract
We report the experimental observation of exciton spin relaxation in GaAs quantum wells in moderate magnetic fields. We resolve the electron and hole contributions and discuss the large sensitivity of the spin-relaxation time to exciton localization and quantum well width. We use the long duration of spin orientation to demonstrate deep transient oscillations, resulting from biexcitonic effects.
- Received 12 August 1991
DOI:https://doi.org/10.1103/PhysRevLett.68.349
©1992 American Physical Society