Thermoelectric figure of merit of (111) oriented PbTe/Pb 1-xEu xTe double quantum well structure

Abstract

In present report, the thermoelectric opportunities of n - PbTe/Pb1-x Eux Te DQW were estimated theoretically. The model of DQW with rectangular confinement potential oriented parallel to (111) plane, was considered. Dimensional quantization lifts the valley degeneracy and two sets of subbands arising from different valley appear. One set is from longitudinal (l) ellipsoid perpendicular to QW, and second set of three times degenerated subbands arises from oblique (ob) ellipsoids of constant energy.