Simple electron-electron scattering in non-equilibrium Green's function simulations. (March 2016)

• Record Type: Journal Article
• Authors: Winge, David O.; Franckié, Martin; Verdozzi, Claudio; Wacker, Andreas; Pereira, Mauro F.
• Is Part Of: Journal of physics. Volume 696(2016)
• Publication Date: 2016-03
• Subjects: Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/696/1/012013
• Languages: English
• ISSNs: 1742-6588

Abstract

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.