Abstract
We report the results of a pressure study of strained thin single quantum wells (QW’s) grown along [100] and [111] directions. The 〈100〉-grown QW exhibits the expected two-slope behavior with a pressure coefficient of for the direct emission. The observation of a type-II crossover yields a valence-band offset for the [100] of 0.060 eV. In contrast, the 〈111〉-grown quantum well exhibits an unusual three-slope pressure behavior. We find a pressure coefficient of for the direct emission. Excitation intensity studies assist in the identification of above crossover emissions which imply a large valence-band discontinuity for the 〈111〉 QW of
- Received 29 June 1998
DOI:https://doi.org/10.1103/PhysRevB.59.5056
©1999 American Physical Society