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- W2022503863 abstract "Abstract The competition between confinement potential fluctuations and band-gap renormalization (BGR) in GaAs / Al x Ga 1 − x As quantum wells grown on [1 0 0] and [3 1 1]A GaAs substrates is evaluated. The results clearly demonstrate the coexistence of the band-tail states filling related to potential fluctuations and the band-gap renormalization caused by an increase in the density of photogenerated carriers during the photoluminescence (PL) experiments. Both phenomena have strong influence on temperature dependence of the PL-peak energy ( E PL ( T ) ) . As the photon density increases, the EPL can shift to either higher or lower energies, depending on the sample temperature. The temperature at which the displacement changes from a blueshift to a redshift is governed by the magnitude of the potential fluctuations and by the variation of BGR with excitation density. A simple band-tail model with a Gaussian-like distribution of the density of state was used to describe the competition between the band-tail filling and the BGR effects on EPL(T)." @default.
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- W2022503863 date "2012-06-01" @default.
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- W2022503863 title "Analysis of confinement potential fluctuation and band-gap renormalization effects on excitonic transition in GaAs/AlGaAs multiquantum wells grown on (100) and (311)A GaAs surfaces" @default.
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- W2022503863 doi "https://doi.org/10.1016/j.physb.2012.02.020" @default.
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