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

Journal Article · Thu Jul 01 04:00:00 EDT 1999 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.60.1819· OSTI ID:351903

Franceschetti, A; Fu, H; Wang, L W; Zunger, A ^[1]

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1. National Renewable Energy Laboratory, Golden, Colorado 80401 (United States)

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{sup {minus}2} instead of R{sup {minus}3}). Our calculated exciton fine structure is compared with recent experimental results obtained by size-selective optical spectroscopies. {copyright} {ital 1999} {ital The American Physical Society}

• OSTI ID: 351903
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 3 Vol. 60; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CADMIUM COMPOUNDS
CADMIUM SELENIDES
ELECTRON CORRELATION
EXCHANGE INTERACTIONS
EXCITONS
FINE STRUCTURE
INDIUM COMPOUNDS
INDIUM PHOSPHIDES
MANY-BODY PROBLEM
SLATER METHOD
WAVE FUNCTIONS