Influence of external electric field on the band-gap renormalization and excitonic absorption spectra of highly excited quantum-well wires

Authors
Duc, HT Thoai, DBT
Citation
Ht. Duc et Dbt. Thoai, Influence of external electric field on the band-gap renormalization and excitonic absorption spectra of highly excited quantum-well wires, PHYSICA B, 293(1-2), 2000, pp. 1-5
Citations number
13
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA B
ISSN journal
09214526 → ACNP
Volume
293
Issue
1-2
Year of publication
2000
Pages
1 - 5
Database
ISI
SICI code
0921-4526(200012)293:1-2<1:IOEEFO>2.0.ZU;2-V
Abstract
The band-gap renormalization (BGR) of a photo-excited quantum-well wire (QW W) in the presence of an external electric field was studied within the lea ding-order screening approximation. We have included the following contribu tions to the BGR: quantum-confined Stark-, Hartree-, exchange- and correlat ion contributions. Our numerical results for GaAs QWW showed besides a larg e difference between the BGR also interesting discrepancy between excitonic absorption spectra in the screening approximation and in the Hartree-Fock approximation. (C) 2000 Elsevier Science B.V. All rights reserved.