Abstract
We present a study of interacting, separately confined electron and hole layers that are photoexcited in undoped GaAs/AlAs mixed types I-II quantum wells. The low-temperature interband photoluminescence spectra and circularly polarized integrated intensity were studied as a function of a perpendicularly applied magnetic field (B≤7 T) and 2DEG density (ne≤8×1011 cm-2). The observed rich structure of the lowest Landau index magnetoexcitons and the strong intensity oscillations at integral filling factors are interpreted as due to cooperative 2DEG-2DHG transitions and, possibly, to the formation of weakly bound inter-layer excitons.
Original language | English (US) |
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Pages (from-to) | 650-654 |
Number of pages | 5 |
Journal | Physica E: Low-Dimensional Systems and Nanostructures |
Volume | 6 |
Issue number | 1 |
DOIs | |
State | Published - Feb 2000 |
Externally published | Yes |
Event | 13th International Conference on the Electronic Properties of Two-Dimensional Systems (EP2DS-13) - Ottawa, Ont, Can Duration: Aug 1 1999 → Aug 6 1999 |
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics