Tuning the magnetic properties of ZnCdSe/ZnSe quantum dots by thermal annealing

Tuning the magnetic properties of ZnCdSe/ZnSe quantum dots by thermal annealing

Photoluminescence of ZnCdSe/ZnSe quantum dots treated by thermal annealing is investigated in magnetic fields up to 6 T. Thermal annealing leads to considerable changes of the circular polarization properties, which we attribute to different spin relaxation times and exciton lifetimes. A negative di...

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Veröffentlicht in:Physica status solidi. C 2006-12, Vol.3 (11), p.3904-3907
Hauptverfasser: Margapoti, E., Worschech, L., Mahapatra, S., Brunner, K., Bougerol, C., Forchel, A.
Format: Artikel
Sprache:eng
Schlagworte:
78.20.Ls
78.55.Et
78.67.Hc
81.40.Ef
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Zusammenfassung:Photoluminescence of ZnCdSe/ZnSe quantum dots treated by thermal annealing is investigated in magnetic fields up to 6 T. Thermal annealing leads to considerable changes of the circular polarization properties, which we attribute to different spin relaxation times and exciton lifetimes. A negative diamagnetic shift is observed for quantum dots showing the largest TA‐induced shift of 80 meV. Possible origins are discussed. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
ISSN:1862-6351
1610-1634
1610-1642
DOI:10.1002/pssc.200671609