NEGATIVELY AND POSITIVELY CHARGED EXCITONS IN GAAS ALXGA1-XAS QUANTUM-WELLS/

Authors
FINKELSTEIN G SHTRIKMAN H BARJOSEPH I
Citation
G. Finkelstein et al., NEGATIVELY AND POSITIVELY CHARGED EXCITONS IN GAAS ALXGA1-XAS QUANTUM-WELLS/, Physical review. B, Condensed matter, 53(4), 1996, pp. 1709-1712
Citations number
16
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physical review. B, Condensed matter → ACNP
ISSN journal
01631829
Volume
53
Issue
4
Year of publication
1996
Pages
1709 - 1712
Database
ISI
SICI code
0163-1829(1996)53:4<1709:NAPCEI>2.0.ZU;2-B
Abstract
We report the observation of the positively charged exciton and of the triplet state of the negatively charged exciton in modulation doped G aAs quantum wells. Applying a gate voltage at high magnetic fields we find that the photoluminescence line of the two-dimensional electron g as smoothly transforms into a negatively charged exciton and not into a neutral exciton. The Zeeman splitting of this line exhibits an abrup t change at the metal-insulator transition.