Interlayer correlation of embedded quantum-dot arrays through their surface strain energy distributions

Ernie Pan*, Yu Zou, Peter W. Chung, Yan Zhang

*此作品的通信作者

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5 引文 斯高帕斯(Scopus)

摘要

We propose an interlayer correlation of multilayer quantum-dot (QD) distributions from a rigorous strain energy calculation. This leads to a map of correlations, or interlayer alignment, based solely on lateral and vertical spacing (xdist/b versus hdist/h). We identify four distinct correlation regimes-aligned correlation, antialigned correlation, noncorrelation, and the transition zone between the aligned and antialigned correlation. Our prediction matches well with available experimental data for a broad range of semiconductors with low elastic anisotropy [A=2 C44 / (C11 - C12) <2] and can further predict the QD array distribution for those with high elastic anisotropy (A 2) by a simple shift in hdist/h. The agreement spans both IV-VI and III-V systems. Moreover, the aligned correlation regime produces a large decay in strain energy magnitudes in subsequently grown layers, which may contribute to their observed larger nucleation domains.

原文English
文章編號073302
期刊Physical Review B - Condensed Matter and Materials Physics
80
發行號7
DOIs
出版狀態Published - 17 8月 2009

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