Tuning the properties of magnetic CdMnTe quantum dots

S. Mackowski; H. E. Jackson; L. M. Smith; J. Kossut; G. Karczewski; W. Heiss

doi:10.1063/1.1622438

Tuning the properties of magnetic CdMnTe quantum dots

Materials Science 2009-11-10 v1

Authors: S. Mackowski , H. E. Jackson , L. M. Smith , J. Kossut , G. Karczewski , W. Heiss

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Abstract

We show that CdMnTe self-assembled quantum dots can be formed by depositing a submonolayer of Mn ions over a ZnTe surface prior to deposition of the CdTe dot layer. Single dot emission lines and strongly polarized quantum dot photoluminescence in an applied magnetic field confirm the presence of Mn in individual quantum dots. The width of PL lines of the single CdMnTe dots is 3 meV due to magnetic moment fluctuations of the Mn ions. After rapid thermal annealing, the emission lines of individual magnetic quantum dots narrow significantly to 0.25 meV showing that effect of magnetic fluctuations is strongly reduced most probably due to an increase in the average quantum dot size. These results suggest a way to tune the spin properties of magnetic quantum dots.

Keywords

quantum dots CdMnTe magnetic properties photoluminescence spin control

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@article{arxiv.cond-mat/0308112,
  title  = {Tuning the properties of magnetic CdMnTe quantum dots},
  author = {S. Mackowski and H. E. Jackson and L. M. Smith and J. Kossut and G. Karczewski and W. Heiss},
  journal= {arXiv preprint arXiv:cond-mat/0308112},
  year   = {2009}
}

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13 pages, 4 figures

Tuning the properties of magnetic CdMnTe quantum dots

Abstract

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