TITLE

Optical spin control in nanocrystalline magnetic nanoswitches

AUTHOR(S)
Echeverría-Arrondo, C.; Pérez-Conde, J.; Ayuela, A.
PUB. DATE
July 2009
SOURCE
Applied Physics Letters;7/27/2009, Vol. 95 Issue 4, p043111
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We investigate the optical properties of (Cd,Mn)Te quantum dots (QDs) by looking at the excitons as a function of the Mn impurities positions and their magnetic alignments. When doped with two Mn impurities, the Mn spins, aligned initially antiparallel in the ground state, have lower energy in the parallel configuration for the optically active spin-up exciton. Hence, the photoexcitation of the QD ground state with antiparallel Mn spins induces one of them to flip and they align parallel. This suggests that (Cd,Mn)Te QDs are suitable for spin-based operations handled by light.
ACCESSION #
43494185

 

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