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Shubnikov-de Haas and Van der Pauw Hall effect measurements at 1.5 K have been carried out to investigate the existence of a two-dimensional electron gas and to determine subband energies in an Si-delta-doped Al 0.27 Ga 0.73 As/GaAs single quantum well. Capacitance-voltage profiling measurements have been performed to characterize the properties of centre delta-doped Al 0.27 ...
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