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Normalized absorption spectra of and samples on V -edge. The spectra of and standards are provided for reference. The inset shows the XRD results of the and samples.
(a) The zero-field-cooling (ZFC) and field-cooling (FC) curves for sample, (b) the ZFC-FC curves for sample, (c) the loop at 300 K for sample, and (d) the loops at 20 K and 300 K for sample.
The plots for sample at 20, 270, and 300 K. The inset shows the plot for sample at 300 K.
The schematic diagram of the charges transfer between two BMPs with exaggerated defect density. is the localization length of a single polaron. is the effective localization length of the overlapping polarons. and are the effective polaron as a large ion with charge and , respectively. is the numbers of electrons.
The bulk electrical resistivity , the free-carrier concentration , and the conductivity mobility of the and samples at different measured temperatures.
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