Broadening of the excitonic mobility edge in a macroscopically disordered CdSe/ZnSe short-period superlattice

Authors
Toropov, AA Shubina, TV Sorokin, SV Lebedev, AV Kyutt, RN Ivanov, SV Karlsteen, M Willander, M Pozina, GR Bergman, JP Monemar, B
Citation
Aa. Toropov et al., Broadening of the excitonic mobility edge in a macroscopically disordered CdSe/ZnSe short-period superlattice, PHYS REV B, 59(4), 1999, pp. R2510-R2513
Citations number
25
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B-CONDENSED MATTER
ISSN journal
01631829 → ACNP
Volume
59
Issue
4
Year of publication
1999
Pages
R2510 - R2513
Database
ISI
SICI code
0163-1829(19990115)59:4<R2510:BOTEME>2.0.ZU;2-L
Abstract
Selective excitation photoluminescence measurements performed in CdSe/ZnSe superlattices with an embedded Zn1-xCdxSe quantum well reveal the limitatio n of the mobility edge concept to describe the dynamics of localized excito ns in this system. Both localized and extended excitonic states are found t o coexist in a certain energy range. We suggest that this behavior is gover ned by a macroscopic band-gap modulation imposed on the microscopic random localization potential. [S0163-1829(99)50704-2].