Abstract
In this paper, we present a straightforward model calculation, based on a heuristic approach, which gives a satisfactory description of excitons in quantum-confined heterostructures, varying continuously from isolated quantum wells to superlattices. In particular, we show how it is possible to account for the progressive crossing from a Wannier-like regime, for short periods, to a Frenkel-like behavior, when the quantum wells become decoupled. We propose a comparison with previous variational approaches.
- Received 30 June 1992
DOI:https://doi.org/10.1103/PhysRevB.46.13603
©1992 American Physical Society