Tuning the properties of magnetic CdMnTe quantum dots

被引：33

作者：

Mackowski, S ^{[1
]}

Jackson, HE

Smith, LM

Kossut, J

Karczewski, G

Heiss, W

机构：

[1] Univ Cincinnati, Dept Phys, Cincinnati, OH 45221 USA

[2] Polish Acad Sci, Inst Phys, Warsaw, Poland

[3] Johannes Kepler Univ, Inst Halbleiter & Festkorperphys, Linz, Austria

来源：

APPLIED PHYSICS LETTERS | 2003年 / 83卷 / 17期

关键词：

D O I：

10.1063/1.1622438

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We show that CdMnTe self-assembled quantum dots (QDs) 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 QD photoluminescence (PL) in an applied magnetic field confirm the presence of Mn in individual QDs. The width of PL lines of the single CdMnTe dots is 3 meV due to magnetic moment fluctuations (MMFs) of the Mn ions. After rapid thermal annealing, the emission lines of individual magnetic QDs narrow significantly to 0.25 meV, showing that effect of MMFs is strongly reduced, most probably due to an increase in the average QD size. These results suggest a way to tune the spin properties of magnetic QDs. (C) 2003 American Institute of Physics.

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收藏

页码：3575 / 3577

页数：3

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