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- W2569145655 abstract "We report on a detailed study of the photoluminescence (PL) in high quality GaAs/AlGaAs quantum wells containing a two-dimensional electron gas. The 2DEG density was varied by optical depletion (with He–Ne laser illumination) in the range of n2D = (7–3) × 1010 cm−2. The n2D-dependent PL spectra were studied under a perpendicularly applied magnetic field B < 12 T at TL = 0.3 and 1.5 K. The evolution from free hole-2DEG to charged exciton PL with decreasing n2D or with increasing magnetic field is attributed to the appearance of regions containing localized electrons as the filling factor decreases below ν = 0.4–0.3. This results in simultaneous PL of the free hole-2DEG originating from electron puddles and of charged exciton from regions with localized electrons. (© 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)" @default.
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- W2569145655 date "2004-01-01" @default.
- W2569145655 modified "2023-09-24" @default.
- W2569145655 title "Photoluminescence spectral evolution from 2DEG-free hole to charged excitons in modulation-doped GaAs/AlGaAs quantum wells" @default.
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