The Hall mobility of electrons in has been observed as a function of temperature and of carrier concentration. A lattice mobility of 5000 cm 2 /v‐sec at 290°K is calculated from these results, varying with temperature at least as rapidly as . The observations can be interpreted by assuming a combination of lattice and ionized impurity scattering with an effective mass of the order of 0.05 , or less.
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Glisksman et al. (1958) studied this question.