FEMTOSECOND SCATTERING DYNAMICS IN MAGNETIC SEMICONDUCTOR SPIN SUPERLATTICES

Citation
Jf. Smyth et al., FEMTOSECOND SCATTERING DYNAMICS IN MAGNETIC SEMICONDUCTOR SPIN SUPERLATTICES, Physical review letters, 71(4), 1993, pp. 601-604
Citations number
18
Categorie Soggetti
Physics
Journal title
ISSN journal
00319007
Volume
71
Issue
4
Year of publication
1993
Pages
601 - 604
Database
ISI
SICI code
0031-9007(1993)71:4<601:FSDIMS>2.0.ZU;2-7
Abstract
Spin-dependent dynamics of polarized carriers in a series of Zn1-xMnxS e/ZnSe superlattice structures are directly observed by time-resolved upconversion photoluminescence spectroscopy at low temperatures. Polar ization measurements in small magnetic fields reveal spin-flip scatter ing of carriers confined within a magnetic quantum well. A marked chan ge in the dynamics is observed with increasing field and subsequent sp in superlattice formation. Exciton lifetimes and spin relaxation are s een to be strongly dependent on both the energy and location of spin s tates in the heterostructure.