Direct pseudopotential calculation of exciton Coulomb and exchange energies in semiconductor quantum dots

被引：230

作者：

Franceschetti, A

Zunger, A

机构：

[1] National Renewable Energy Laboratory, Golden, CO

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 78卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.78.915

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The effects of electron-hole interaction on the exciton energy of semiconductor quantum dots are calculated using pseudopotential wave functions. A comparison with the widely used, but never tested, effective-mass approximation (EMA) shows that the electron-hole Coulomb energy is significantly (similar to 40%) overestimated by the EMA, and that the scaling with the dot size R is sublinear in 1/R. The exchange splitting is much smaller than the Coulomb energy, and in the case of CdSe quantum dots shows significant deviations from the 1/R(3) scaling predicted by the EMA.

引用

页码：915 / 918

页数：4

共 26 条

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