Abstract
We develop a kinetic theory approach from the semiclassical Boltzmann transport equation for the thermotransport of electrons in degenerate polar semiconductors. The method of moments applied to the Boltzmann equation gives us a set of hydrodynamical equations which are closed up to thirteen relevant variables, including energy density, the stress tensor and the heat flux in the description. The closure of the balance equations is achieved by evaluating the higher order momenta, as well as the production terms, through a non equilibrium distribution function coming from the maximum entropy principle. We assume that electronoptical polar phonon interaction is the leading scattering process in order to obtain analytical expressions for both, the characteristic relaxation times and the usual thermoelectric coefficients. We also show that in this case the Onsager symmetry relationship is not satisfied. (© 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
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