Many-body pseudopotential theory of excitons in InP and CdSe quantum dots

被引：340

作者：

Franceschetti, A ^{[1
]}

Fu, H ^{[1
]}

Wang, LW ^{[1
]}

Zunger, A ^{[1
]}

机构：

[1] Natl Renewable Energy Lab, Golden, CO 80401 USA

来源：

PHYSICAL REVIEW B | 1999年 / 60卷 / 03期

关键词：

D O I：

10.1103/PhysRevB.60.1819

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present a pseudopotential approach to the calculation of the excitonic spectrum of semiconductor quantum dots. Starting from a many-body expansion of the exciton wave functions in terms of single-substitution Slater determinants constructed from pseudopotential single-particle wave functions, our method permits an accurate and detailed treatment of the intraconfiguration electron-hole Coulomb and exchange interactions, while correlation effects can be included in a controlled fashion by allowing interconfiguration coupling. We calculate the exciton fine structure of InP and CdSe nanocrystals in the strong-confinement regime. We find a different size dependence for the electron-hole exchange interaction than previously assumed (i.e., R-2 instead of R-3). Our calculated exciton fine structure is compared with recent experimental results obtained by size-selective optical spectroscopies. [S0163-1829(99)00227-1].

引用

页码：1819 / 1829

页数：11

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