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Band gap renormalization in photoexcited semiconductor quantum wire structures in the GW approximation | | E. H. Hwang
; S. Das Sarma
; | | Date: |
9 Feb 1998 | | Journal: | Phys. Rev. B 58, R1738 (1998) | | Subject: | Mesoscopic Systems and Quantum Hall Effect; Strongly Correlated Electrons | cond-mat.mes-hall cond-mat.str-el | | Abstract: | 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 Fröhlich 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. | | Source: | arXiv, cond-mat/9802096 | | Services: | Forum | Review | PDF | Favorites | |
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