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Spin properties of charged single Mn‐doped quantum dots
Author(s) -
Léger Y.,
Besombes L.,
Maingault L.,
FernándezRossier J.,
Ferrand D.,
Mariette H.
Publication year - 2006
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200671506
Subject(s) - exciton , quantum dot , exchange interaction , spin (aerodynamics) , atom (system on chip) , condensed matter physics , electron , valence (chemistry) , doping , magnetic field , atomic physics , physics , spin states , biexciton , chemistry , ferromagnetism , quantum mechanics , computer science , thermodynamics , embedded system
The optical properties of individual quantum dots doped with a single Mn atom and charged with a single carrier (electron or hole) are analyzed. The emission of the neutral, positively charged and negatively charged excitons coupled with a single magnetic atom are observed in the same quantum dot. The spectrum of the charged excitons in interaction with the Mn atom shows a rich pattern attributed to a strong anisotropy of the hole–Mn exchange interaction slightly perturbed by a small valence band mixing. For the positively charged exciton, the emission pattern shows that the different spin states of the hole–Mn complex remain split in the final state after the exciton recombination. This opens the possibility of storing information on a single carrier spin on a long time scale in the absence of external magnetic field. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)