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Spin injection in a coupled system of a diluted magnetic semiconductor Zn0.80Mn0.20Se and self-assembled quantum dots of CdSe
Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Functional Electronic Materials.
Linköping University, Department of Physics, Chemistry and Biology, Functional Electronic Materials. Linköping University, The Institute of Technology.ORCID iD: 0000-0001-7155-7103
Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Functional Electronic Materials.ORCID iD: 0000-0002-6405-9509
Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai, 980-8577, Japan.
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2008 (English)In: Proceedings of the 7th International Conference on Physics of Light-Matter Coupling in Nanostructures, 2008, Vol. 43, no 5-6, 615-619 p.Conference paper, Published paper (Refereed)
Abstract [en]

Spin injection processes from a Zn0.80Mn0.20Se diluted magnetic semiconductor (DMS) to adjacent self-assembled CdSe quantum dots (QDs) were investigated by cw and time-resolved magneto-optical spectroscopy in combination with tunable laser excitation. Direct experimental evidence for the spin injection was provided from the generation of the spin polarization in the QDs, which was opposite to their expected intrinsic polarization, by resonantly generating the spins in the DMS. The observed limited spin polarization generated by the spin injection, together with the sensitivity of the spin injection efficiency on structure design, indicates severe spin loss during the process and calls for further investigations to optimize spin injection efficiency in quantum structures. © 2007 Elsevier Ltd. All rights reserved.

Place, publisher, year, edition, pages
2008. Vol. 43, no 5-6, 615-619 p.
Series
SUPERLATTICES AND MICROSTRUCTURES, ISSN 0749-6036 ; 43
Keyword [en]
CdSe QD, DMS, Spin injection, Spintronics, ZnMnSe
National Category
Engineering and Technology Condensed Matter Physics
Identifiers
URN: urn:nbn:se:liu:diva-46344DOI: 10.1016/j.spmi.2007.07.002OAI: oai:DiVA.org:liu-46344DiVA: diva2:267240
Conference
7th International Conference on Physics of Light-Matter Coupling in Nanostructures
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2017-03-27

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Dagnelund, DanielBuyanova, IrinaChen, Weimin

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