Thermoelectric effect in superlattices; applicability of coherent and incoherent transport models
Journal article, Peer reviewed
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Original versionMusland, L., Flage-Larsen, E. (2018) Thermoelectric effect in superlattices; applicability of coherent and incoherent transport models. Computational materials science. 153, pp. 88-96. 10.1016/j.commatsci.2018.05.044
Calculations of thermoelectric transport coeﬃcients including quantum eﬀects are performed on superlattices using the Buttiker approximation. The results arecomparedto the Boltzmann transport equation withminibands present, and to an incoherent transport model. Comparisons are performed in the linear regime for the electrical conductivity, Seebeck and Lorenz coeﬃcients. We show that at superlattice periods smaller than the typical electron mean free path, the former model and the calculations including quantum eﬀects are in agreement. However, for longer superlattices the incoherent model is shown to be more correct.