Abstract
Electric-field-dependent measurements of photocurrent spectra of multiple quantum wells are made for . Strong room-temperature exciton enhancement and quantum-confined Stark effect are observed for as low as 0.0082. Below that value behavior is more bulklike. It is at this value that theory predicts that the holes should become delocalized. This study indicates that a three-dimensional electron and a two-dimensional hole results in a two-dimensional exciton in this system.
- Received 3 December 1991
DOI:https://doi.org/10.1103/PhysRevB.45.13773
©1992 American Physical Society