Publication detail

Interplay between multipole expansion of exchange interaction and Coulomb correlation of exciton in colloidal II-VI quantum dots

KLENOVSKÝ, P. VALDHANS, J. KREJČÍ, L. VALTR, M. KLAPETEK, P. FEDOTOVA, O.

Original Title

Interplay between multipole expansion of exchange interaction and Coulomb correlation of exciton in colloidal II-VI quantum dots

Type

journal article in Web of Science

Language

English

Original Abstract

We study the effect of Coulomb correlation on the emission properties of the ground state exciton in zincblende CdSe/ZnS core-shell and in wurtzite ZnO quantum dots (QDs). We validate our theory model by comparing results of computed exciton energies of CdSe/ZnS QDs to photoluminescence and scanning near-field optical microscopy measurements. We use that to estimate the diameter of the QDs using a simple model based on infinitely deep quantum well and compare the results with the statistics of the atomic force microscopy scans of CdSe/ZnS dots, obtaining excellent agreement. Thereafter, we compute the energy fine structure of exciton, finding striking difference between properties of zincblende CdSe/ZnS and wurtzite ZnO dots. While in the former the fine structure is dominated by the dipole terms of the multipole expansion of the exchange interaction, in the latter system that is mostly influenced by Coulomb correlation. Furthermore, the correlation sizeably influences also the exciton binding energy and emission radiative rate in ZnO dots.

Keywords

quantum dot; colloidal; multiparticle states; configuration interaction; correlation; AFM; SNOM

Authors

KLENOVSKÝ, P.; VALDHANS, J.; KREJČÍ, L.; VALTR, M.; KLAPETEK, P.; FEDOTOVA, O.

Released

1. 3. 2022

Publisher

IOP Publishing Ltd

Location

BRISTOL

ISBN

2516-1075

Periodical

Electronic Structure

Year of study

4

Number

1

State

United Kingdom of Great Britain and Northern Ireland

Pages count

12

URL

https://iopscience.iop.org/article/10.1088/2516-1075/ac5b7e

Full text in the Digital Library

http://hdl.handle.net/11012/209171

BibTex

@article{BUT182321,
  author="Petr {Klenovský} and Jakub {Valdhans} and Lucie {Krejčí} and Miroslav {Valtr} and Petr {Klapetek} and Olga {Fedotova}",
  title="Interplay between multipole expansion of exchange interaction and Coulomb correlation of exciton in colloidal II-VI quantum dots",
  journal="Electronic Structure",
  year="2022",
  volume="4",
  number="1",
  pages="12",
  doi="10.1088/2516-1075/ac5b7e",
  issn="2516-1075",
  url="https://iopscience.iop.org/article/10.1088/2516-1075/ac5b7e"
}