Abstract
There are two categories of problems relating to the study of hot and warm carriers ; i.e., the situation in which the mean carrier kinetic energy deviates measurably from its equilibrium thermal value. The first of these relates to the manner in which a steady state distribution is maintained. The pertinent work to date, both experimental and theoretical, is reviewed. The second set of problems involves the phenomena which result from a non-equilibrium distribution, but that do not play a significant role in determining it. The velocity dependence of recombination cross sections, impact ionization of neutral impurities and enhanced thermionic emission are among these. The present experimental situation is discussed and related to what relevant theory exists for the various cases.
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