Abstract
A theory of phonon-drag thermopower (PDTP) of a quasi-two-dimensional electron gas in quantum well semiconductor heterostructures in the presence of a quantizing magnetic field is presented. At liquid-helium temperatures PDTP is found to be of the order of a few mV/K which is two to three orders of magnitude larger than diffusion thermopower. The effect of screening is to suppress PDTP and to modify its variation with temperature.
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