Self-assembled semiconductor quantum dots with nearly uniform sizes

被引：34

作者：

Alchalabi, K

Zimin, D

Kostorz, G

Zogg, H ^{[1
]}

机构：

[1] Swiss Fed Inst Technol, Thin Film Phys Grp, Solid State Phys Lab, Zurich, Switzerland

[2] Swiss Fed Inst Technol, Inst Appl Phys, Zurich, Switzerland

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 90卷 / 02期

关键词：

D O I：

10.1103/PhysRevLett.90.026104

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Self-assembled PbSe quantum dots on PbTe quasisubstrates, where the quasisubstrate layer is grown on Si(111), show a size distribution as low as 2%, below any other reported size distribution. The result is explained by nonoverlapping diffusion radii for most of the dots and their nucleation occurring mainly at defects (glide steps of the quasisubstrate), conditions which are not met by self-assembled quantum-dot structures in other material systems.

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