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- W1964961570 startingPage "1647" @default.
- W1964961570 abstract "We have observed very sharp lines in magnetoluminescence spectra of a GaAs-${mathrm{Al}}_{mathit{x}}$${mathrm{Ga}}_{1mathrm{ensuremath{-}}mathit{x}}$As single heterostructure under resonant excitation of 10--70 meV above the GaAs direct energy gap. More than 14 lines were observed in both ${mathrm{ensuremath{sigma}}}^{+}$ and ${mathrm{ensuremath{sigma}}}^{mathrm{ensuremath{-}}}$ polarizations, at magnetic fields as low as 0.6 T. The spectral positions of these lines and their dependence on the magnetic field allow us to attribute the strongest lines to optical transitions between electron and light-hole Landau levels with indices from n=2 to 15. The nonparabolicity of the bands and effects of the resonant electron-phonon interaction were directly observed in the luminescence spectra. The energies of optical transitions obtained for large Landau indices at low magnetic fields allow an accurate determination of band parameters in the classical limit. The effective mass and g factors of the light holes are found to be ${mathit{m}}_{mathrm{lh}}^{mathrm{*}}$=(0.078ifmmodepmelsetextpmfi{}0.002)${mathit{m}}_{0}$ and ${mathit{g}}_{mathrm{lh}}^{mathrm{*}}$=30.7ifmmodepmelsetextpmfi{}0.7 for a magnetic field along the [001] direction." @default.
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- W1964961570 date "1993-07-15" @default.
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- W1964961570 title "Magnetoluminescence of GaAs in the quasiclassical limit" @default.
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- W1964961570 doi "https://doi.org/10.1103/physrevb.48.1647" @default.
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