Abstract
The line shape of the photoluminescence spectrum is calculated for a two-dimensional model system of non-interacting particles in the presence of impurities. The photoluminescence cross section is analysed by perturbation theory within the self-consistent born approximation. The effect of a strong magnetic field on the spectrum is also investigated. The line shapes turn out to be sensitive to the nature of the scatterers especially in the high- magnetic-field limit. Experimental photoluminescence spectra thus open the possibility of distinguishing between charged impurities and neutral scatterers like surface roughness or alloy disorder. Numerical results are presented for GaAs-Ga1-xAlxAs modulation-doped quantum wells with short-range scattering potentials fitted to mobility data. The calculated zero-field broadening is consistent with published experimental results if charged impurity scattering is assumed.
Original language | English |
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Pages (from-to) | 1553-1566 |
Number of pages | 14 |
Journal | Journal of Physics C: Solid State Physics |
Volume | 19 |
Issue number | 10 |
DOIs | |
Publication status | Published - 1986 Apr 10 |
Externally published | Yes |
ASJC Scopus subject areas
- Condensed Matter Physics
- Engineering(all)
- Physics and Astronomy(all)