TRION-ELECTRON SCATTERING IN GAAS ALAS QUANTUM-WELLS/

Authors
MANASSEN A HAREL R COHEN E RON A LINDER E PFEIFFER LN
Citation
A. Manassen et al., TRION-ELECTRON SCATTERING IN GAAS ALAS QUANTUM-WELLS/, Surface science, 362(1-3), 1996, pp. 443-446
Citations number
10
Categorie Soggetti
Chemistry Physical
Journal title
Surface science → ACNP
ISSN journal
00396028
Volume
362
Issue
1-3
Year of publication
1996
Pages
443 - 446
Database
ISI
SICI code
0039-6028(1996)362:1-3<443:TSIGAQ>2.0.ZU;2-W
Abstract
We report on the photoluminescence (PL) lineshape of negatively charge d excitons (trions) in mixed type I-type II GaAs/AlAs quantum wells. A two-dimensional electron gas (2DEG) is photoexcited in the wide wells of this structure and for a low density (n(e) < 10(10) cm(-2)) the sp ectrum is dominated by a free trion band whose broadening depends on n (e). We calculated the elastic and inelastic trion-electron scattering rate for various 2DEG densities and show that this mechanism explains well the observed PL lineshape.