Transient Spectroscopy of Optical Spin Injection in ZnMnSe/ZnCdSe Quantum Structures
2005 (English)Conference paper (Refereed)
We show, by time-resolved magneto-photoluminescence (PL) spectroscopy in combination with selective laser excitation, that optical polarization of the ZnCdSe spin detector induced by spin injection from the ZnMnSe spin injector persists over a much longer time scale than the lifetime of the ZnMnSe excitons. This finding provides compelling experimental evidence that the dominant mechanism for the observed spin injection in the ZnMnSe/ZnCdSe structures should not be due to injection of the excitonic spins of the diluted magnetic semiconductor (DMS). It is rather due to e.g. a delayed spin injection arising from tunneling of individual carriers or/and trapped spins in ZnMnSe.
Place, publisher, year, edition, pages
Journal of Superconductivity and Novel Magnetism, vol. 18: Springer , 2005. Vol. 18, no 3, 371-373 p.
National CategoryNatural Sciences Condensed Matter Physics
IdentifiersURN: urn:nbn:se:liu:diva-45034DOI: 10.1007/s10948-005-0012-3Local ID: 79461OAI: oai:DiVA.org:liu-45034DiVA: diva2:265896
3rd International Conference on Physics and Applications of Spin-Related Phenomena in Semiconductors (PASPS III)