Abstract
Analytical expressions of the effective exciton-exciton interaction in quantum wells are derived with a main focus on the dependence of the interactions on the quantum-well width. Any modification in the strength of the exciton-exciton interactions due to confinement is incorporated in α, a measure of dimensionality of the confined excitonic system. The flexibility of the derived expressions is shown in a systematic study of both the direct and exchange terms of the exciton-exciton interaction in and quantum wells. Results show the appreciable sensitivity of interexcitonic interaction to α due to changes in the extension of excitonic radial distribution and strength at which local charges are neutralized, perpendicular to the direction of the growth of well layers.
- Received 19 October 2000
DOI:https://doi.org/10.1103/PhysRevB.63.045321
©2001 American Physical Society