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Transfer dynamics of spin-polarized excitons into semiconductor quantum dots
Tohoku University.
Tohoku University.
Tohoku University.
Tohoku University.
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2009 (English)In: Journal of Luminescence, ISSN 0022-2313, E-ISSN 1872-7883, Vol. 129, 1927-1930 p.Article in journal (Refereed) Published
Abstract [en]

We study on the transfer dynamics of spin-polarized excitons into self-assembled quantum dots (QDs) of CdSe coupled with a diluted magnetic semiconductor (DMS) layer of ZnMnSe through a ZnSe barrier layer. A variation in the degree of circular polarization P of excitonic photoluminescence in the coupled QDs was observed between samples with different thicknesses (LB) of the non-magnetic barrier. Relatively high values of P (0.3) were obtained in the samples with LB=1 or 2 nm, and the time dependences of the P value indicate the spin-transfer dynamics. From the LB dependence of the spin-transfer time, the spin-transfer mechanism is discussed, namely spin-conserving energy transfer.

Place, publisher, year, edition, pages
2009. Vol. 129, 1927-1930 p.
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:liu:diva-21931DOI: 10.1016/j.jlumin.2009.03.036OAI: oai:DiVA.org:liu-21931DiVA: diva2:242068
Available from: 2009-10-06 Created: 2009-10-06 Last updated: 2017-12-13

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Dagnelund, DanielBuyanova, IrinaChen, Weimin

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