Spectrum and tunneling in self-assembled quantum dots

被引：4

作者：

Larkin, I ^{[1
]}

Vagov, A ^{[1
]}

机构：

[1] Univ Sheffield, Dept Phys & Astron, Sheffield S10 2TN, S Yorkshire, England

来源：

PHYSICAL REVIEW B | 2003年 / 67卷 / 11期

关键词：

D O I：

10.1103/PhysRevB.67.115318

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present analytical results for the tunneling escape rate for nanoscale quantum dots (QD's). It is shown that tunneling from excited states with nonzero angular momentum is suppressed. The tunneling from the states with zero angular momentum is described by a universal expression where only the preexponential factor is dependent of a particular model for a QD. The result is used to calculate the photocurrent spectrum in QD arrays. The expression for the photocurrent is reduced to a simple formula with few model-dependent parameters. The results are in quantitative agreement with experimental data. Average electron ground-state energy of a QD at the flatband condition is extracted from the best fit.

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页数：8

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