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Photoreflectance and surface photovoltage spectroscopy of beryllium-doped GaAs/AlAs multiple quantum wells

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Figure

FIG. 1. Band diagram of �conduction- and valence-band edges.-doped MQW structure. Ec and E� are the �z is the width of the Be-doped layer.
FIG. 2. Room-temperature PR spectra of GaAs epilayer 1796 and �GaAs/AlAs MQW samples with different well widths obtained with pump-ing He–Ne laser with a wavelength of 632.8 nm
FIG. 3. Fourier transforms of the FKOs in the PR spectra �Fig. 2� forsamples 1794, 1795, and 1796.
Fig. 5, the experimental DSPV data �open circles� are rea-
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