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The temperature dependence of lattice-scattering mobility in germanium is determined from conductivity. It is found to be T^-1. 66 for electrons and T^-2. 33 for holes. The result for holes suggests that the valence band is not at the center of the Brillouin zone. The ratio Hall mobility/conductivity mobility is also determined. It is found to be constant with temperature at 1. 05 for electrons. The ratio for holes shows significant temperature dependence. This suggests that the valence band is composed of multiple surfaces of minimum energy.
François Morin (Fri,) studied this question.
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