Band gap renormalization in photoexcited semiconductor quantum wire structures in the GW approximation

Details Band gap renormalization in photoexcited semiconductor quantum wire structures in the GW approximation Band gap renormalization in photoexcited semiconductor quantum wire structures in the GW approximation

1998-02-09

arxiv.org/abs/cond-mat/9802096v1

Phys. Rev. B 58, R1738 (1998)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

11 pages, 3 figures

Scientific paper

10.1103/PhysRevB.58.R1738

We investigate the dynamical self-energy corrections of the electron-hole plasma due to electron-electron and electron-phonon interactions at the band edges of a quasi-one dimensional (1D) photoexcited electron-hole plasma. The leading-order $GW$ dynamical screening approximation is used in the calculation by treating electron-electron Coulomb interaction and electron-optical phonon Fr\"{o}hlich interaction on an equal footing. We calculate the exchange-correlation induced band gap renormalization (BGR) as a function of the electron-hole plasma density and the quantum wire width. The calculated BGR shows good agreement with existing experimental results, and the BGR normalized by the effective quasi-1D excitonic Rydberg exhibits an approximate one-parameter universality.

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