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Antiferromagnetic c...
Antiferromagnetic coupling in CdSe/ZnMnSe quantum dot structures
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- Dagnelund, Daniel (author)
- Linköpings universitet,Funktionella elektroniska material,Tekniska högskolan
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- Ren, Q. J. (author)
- Linköpings universitet,Funktionella elektroniska material,Tekniska högskolan
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- Buyanova, Irina (author)
- Linköpings universitet,Funktionella elektroniska material,Tekniska högskolan
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- Murayama, A. (author)
- Graduate School of Information Science and Technology, Hokkaido University, Japan
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(creator_code:org_t)
- American Institute of Physics (AIP), 2012
- 2012
- English.
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In: Applied Physics Letters. - : American Institute of Physics (AIP). - 0003-6951 .- 1077-3118. ; 101:5, s. 052405-1-052405-
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Abstract
Subject headings
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- Spin polarization of nonmagnetic CdSe quantum dots (QDs) coupled to adjacent ZnMnSe diluted magnetic semiconductor (DMS) is investigated by CW and time-resolved magneto-optical spectroscopy under tunable laser excitation. Efficient enhancement in the degree of σ− circular polarization of photoluminescence from the CdSe QDs is observed under optical excitation at the σ+-active exciton state of the DMS. The fact that the enhancement persists much longer than the exciton lifetime of the DMS rules out a role of the DMS excitons. A possible explanation is discussed in terms of antiferromagnetic coupling between the excitons in QDs and aligned Mn ions in DMS.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Keyword
- antiferromagnetic materials
- cadmium compounds
- excitons
- II-VI semiconductors
- magnetic epitaxial layers
- magnetic multilayers
- magneto-optical effects
- manganese compounds
- photoluminescence
- semiconductor epitaxial layers
- semiconductor quantum dots
- semimagnetic semiconductors
- time resolved spectra
- wide band gap semiconductors
- zinc compounds
Publication and Content Type
- ref (subject category)
- art (subject category)
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