Abstract
Luminescence spectra of highly excited undoped GaAs/GaA1As quantum wells subjected to quantising magnetic field are analysed and compared with conventional photoluminescence excitation (quasi-absorption) measurements. Transitions observed in emission show very little change in the energy position when the excitation intensity, i.e. the quasi-equilibrium population of electron-hole pairs, is varied over a wide range. These transition are, however, very different from magnetoexciton transitions seen in absorption-type spectra. The results are in contradiction with a standard model of two interpenetrating Fermi fluids, usually applied to describe the luminescence spectra of highly excited semiconductors. They indicate the importance of individual electron-hole correlations (excitonic effects) in the case of systems with quasi-discrete one-particle energy levels.
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Schoser, S., Kutter, C., Potemski, M., Etienne, B. (2000). High Density Two-Dimensional Electron-Hole Plasmas in Quantising Magnetic Fields. In: Sadowski, M.L., Potemski, M., Grynberg, M. (eds) Optical Properties of Semiconductor Nanostructures. NATO Science Series, vol 81. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-4158-1_16
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DOI: https://doi.org/10.1007/978-94-011-4158-1_16
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