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- W2082228305 abstract "The low-temperature Hall mobility of photoexcited electrons has been measured in Si-doped MBE AlGaAs samples. Different fractions of occupied DX centres were obtained by selecting different free-electron densities: possible systematic errors in Hall measurements due to the method of photoexcitation are demonstrated and critically analysed. Using suitable values for the acceptor density and the alloy scattering potential a fair fitting of the experimental data was achieved within both negative-U and positive-U models for the DX centre. Discrepancies between calculated and experimental mobility versus temperature curves are observed, which are more evident the lower the free-electron densities. They are tentatively explained as being due to electrons in an impurity band originated by the shallow effective-mass state related to the Gamma minimum of the conduction band." @default.
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- W2082228305 date "1991-10-01" @default.
- W2082228305 modified "2023-09-25" @default.
- W2082228305 title "Hall measurements under weak persistent photoexcitation in Si-doped AlxGa1-xAs" @default.
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- W2082228305 doi "https://doi.org/10.1088/0268-1242/6/10b/005" @default.
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