Abstract
n type lead telluride mobility is calculated at low temperatures, taking into account phonon dispersion. Ionized impurity dispersion is calculated with a screened Coulomb potential plus a short range one. The results of an iterative calculation of the mobility show that is not possible to rule out acoustical dispersion, whose importance is comparable with that on ionized impurities. Comparison with experimental results in cases where compensation is negligible indicates that the short range part of the potential in ionized impurity scattering must not be taken into account. In other situations, experimental results are described fairly well by a realistic compensation Evaluation theorique en incluant la dispersion sur les phonons, la dispersion sur les impuretes etant traitee a l'aide d'un potentiel coulombien avec ecran et d'un potentiel a courte distance: l'importance de la dispersion sur les phonons acoustiques est comparable a celle sur les impuretes ionisees
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