Observation of type-I excitons and related confinement effects in type-II superlattices
- 15 February 1993
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 47 (7), 3806-3810
- https://doi.org/10.1103/physrevb.47.3806
Abstract
CdSe/ Te superlattices are characterized by type-II band alignment. We have used these structures to demonstrate that type-II superlattices can exhibit type-I excitons, i.e., excitons which are confined in the same semiconductor layer (either in CdSe or in Te in the present example). Such spatially direct excitons form in a type-II structure when one of the carriers (electron or hole) originates from a well, while the other (hole or electron) originates from a state localized in the barrier, which is typical for subbands at above-barrier energies.
This publication has 9 references indexed in Scilit:
- Observation of Localized Above-Barrier Excitons in Type-I SuperlatticesPhysical Review Letters, 1992
- Measurement of the CdSe/ZnTe valence band offset by x-ray photoelectron spectroscopyJournal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures, 1991
- Molecular beam epitaxy of a low strain II-VI heterostructure: ZnTe/CdSeApplied Physics Letters, 1991
- Room-temperature exciton absorption in (Zn,Cd)Se/ZnSe quantum wells at blue-green wavelengthsApplied Physics Letters, 1990
- Transfer-matrix algorithm for the calculation of the band structure of semiconductor superlatticesPhysical Review B, 1988
- Diluted magnetic semiconductorsJournal of Applied Physics, 1988
- Optical selection rules in superlattices in the envelope-function approximationPhysical Review B, 1984
- Spatial separation of carriers in InAs–GaSb superlatticesJournal of Vacuum Science and Technology, 1981
- Relation of magneto-optical properties of free excitons to spin alignment of Mn2+ ions in Cd1−xMnxTeSolid State Communications, 1979