Charged excitons trapped on monomolecular CdTe islands in wide ZnTe-(Zn,Mg)Te quantum wells

Authors
Taliercio, T Lefebvre, P Calvo, V Scalbert, D Magnea, N Mathieu, H Allegre, J
Citation
T. Taliercio et al., Charged excitons trapped on monomolecular CdTe islands in wide ZnTe-(Zn,Mg)Te quantum wells, PHYS REV B, 58(23), 1998, pp. 15408-15411
Citations number
14
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B-CONDENSED MATTER
ISSN journal
01631829 → ACNP
Volume
58
Issue
23
Year of publication
1998
Pages
15408 - 15411
Database
ISI
SICI code
0163-1829(199812)58:23<15408:CETOMC>2.0.ZU;2-S
Abstract
Optical spectroscopy at T = 2 K reveals systematically a low-energy compani on to the features of heavy- and light-hole excitons localized on CdTe l-ML -high islands, buried in wide ZnTe/(Zn,Mg) Te quantum wells. These transiti ons are assigned to a negatively charged excitonic complex (trion) from mag netoreflectance and photoluminescence results. A mechanism of formation of the trion is proposed. A clear correlation is found between the exciton ene rgies, which depend on the size and strain of the islands, and the trion bi nding energy, which varies between 1 and 3 meV. [S0163-1829(98)02248-6].