On the local approximation of the electron-photon interaction self-energy

Nicolas Cavassilas (1) , Fabienne Michelini (1) , Marc Bescond (1)

1 IM2NP - Institut des Matériaux, de Microélectronique et des Nanosciences de Provence

We investigate the impact of the so-called local, i.e., diagonal, approximation for the electron-photon scattering self-energy, within the nonequilibrium Green's function formalism. We report on three different systems to show that the local approximation may dramatically degrade expected selection rules, but that this degradation has minor impacts on the physical properties of realistic systems in which other scattering processes are assumed.

Domaines: Micro et nanotechnologies/Microélectronique

Nicolas Cavassilas, Fabienne Michelini, Marc Bescond. On the local approximation of the electron-photon interaction self-energy. Journal of Computational Electronics, 2016, 15 (4, SI), pp.1233-1239. ⟨10.1007/s10825-016-0883-5⟩. ⟨hal-01434948⟩