Regensburg 2010 – scientific programme

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DS: Fachverband Dünne Schichten

DS 13: Thermoelectric Thin Films and Nanostructures I

DS 13.8: Talk

Tuesday, March 23, 2010, 12:15–12:30, H8

Calculation of the Seebeck-coefficient using the NEGF formalism in a 1D-model — •Michael Bachmann, Michael Czerner, and Christian Heiliger — I. Physikalisches Institut, Justus Liebig University Giessen, D-35392, Germany

We present a 1D model that can be used to calculate electron transport through interfaces of heterostructures. The model is based on the non-equilibrium Green's function (NEGF) formalism in the single band effective mass approximation. The effect of phonon scattering is taken into account by adding a self energy to the Hamiltonian. We obtain the Seebeck-coefficient within this model by applying a temperature difference and simultaneously adjusting the voltage to prevent a net current flow. The ratio of this voltage and the difference in temperature is the Seebeck-coefficient. We perform all calculations self consistently with respect to the Poisson equation. (SPP 1386)