The thermoelectric effect in a semiconductor superlattice in a non-quantized electric field

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Abstract
The thermoelectric effect in a semiconductor superlattice in a nonquantized electric field is investigated for electrons of the lowest miniband in the linear approximation of Del T. Analytical expressions for the thermopower and the heat conductivity coefficient are obtained as functions of the superlattice parameters Delta and d, temperature, concentration and electric field E. The results confirm the fact that depending on the relation between Delta and other characteristic energies of the carrier charge (kT, xi and h(cross)/ tau ) the carrier charges can behave either as a quasi-two-dimensional or as a three-dimensional electron gas. The prospect of using a superlattice as a good-quality and highly efficient thermoelement is also proposed.