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arXiv · 1602.03997

Simple electron-electron scattering in non-equilibrium Green's function simulations

David O. Winge·Martin Franckié·Claudio Verdozzi·Andreas Wacker·Mauro F. Pereira
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Abstract

In this work we include electron-electron interaction beyond Hartree-Fock level in our non-equilibrium Green's function approach by a crude form of GW through the Single Plasmon Pole Approximation. This is achieved by treating all conduction band electrons as a single effective band screening the Coulomb potential. We describe the corresponding self-energies in this scheme for a multi-subband system. In order to apply the formalism to heterostructures we discuss the screening and plasmon dispersion in both 2D and 3D systems. Results are shown for a four well quantum cascade laser with different doping concentration where comparisons to experimental findings can be made.

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David O. Winge, Martin Franckié, Claudio Verdozzi, Andreas Wacker, Mauro F. Pereira. 2016-02-12. Simple electron-electron scattering in non-equilibrium Green's function simulations. https://doi.org/10.1088/1742-6596/696/1/012013

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