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a) Room temperature carrier concentration dependent Seebeck coefficient, b) temperature dependent hall mobility, and c) room temperature carrier concentration dependent Hall mobility for (GeTe)1− x(PbSe)x, with a comparison to those of Bi‐doped GeTe.25 A dominant carrier scattering by acoustic phonons is shown by the dashed curve in (b) and the black curve in (a) shows a two‐band model prediction.25
