Direct and exchange Coulomb energies in CdSe/ZnSe quantum dots

T. C M Graham; A. Curran; X. Tang; J. K. Morrod; K. A. Prior; R. J. Warburton

doi:10.1002/pssb.200564654

Direct and exchange Coulomb energies in CdSe/ZnSe quantum dots

T. C M Graham, A. Curran, X. Tang, J. K. Morrod, K. A. Prior, R. J. Warburton

School of Engineering & Physical Sciences

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

We have determined the direct and exchange electron-electron and electron-hole Coulomb energies in CdSe/ZnSe quantum dots. The experiments are based on single dot photoluminescence at low temperature. By controlling the charging with a vertical transistor structure and by applying a symmetry-breaking magnetic field, we show how we can determine all the Coulomb energies. The direct Coulomb energies are responsible for large, ~20 meV, red-shifts of the emission on charging. The exchange Coulomb energies lead to a very pronounced fine structure splitting, up to 2.6 meV, for the neutral exciton. © 2006 WILEY-VCH Verlag GmbH & Co. KGaA.

Original language	English
Pages (from-to)	782-786
Number of pages	5
Journal	Physica Status Solidi B - Basic Research
Volume	243
Issue number	4
DOIs	https://doi.org/10.1002/pssb.200564654
Publication status	Published - Mar 2006

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title = "Direct and exchange Coulomb energies in CdSe/ZnSe quantum dots",

abstract = "We have determined the direct and exchange electron-electron and electron-hole Coulomb energies in CdSe/ZnSe quantum dots. The experiments are based on single dot photoluminescence at low temperature. By controlling the charging with a vertical transistor structure and by applying a symmetry-breaking magnetic field, we show how we can determine all the Coulomb energies. The direct Coulomb energies are responsible for large, ~20 meV, red-shifts of the emission on charging. The exchange Coulomb energies lead to a very pronounced fine structure splitting, up to 2.6 meV, for the neutral exciton. {\textcopyright} 2006 WILEY-VCH Verlag GmbH & Co. KGaA.",

author = "Graham, {T. C M} and A. Curran and X. Tang and Morrod, {J. K.} and Prior, {K. A.} and Warburton, {R. J.}",

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TY - JOUR

T1 - Direct and exchange Coulomb energies in CdSe/ZnSe quantum dots

AU - Graham, T. C M

AU - Curran, A.

AU - Tang, X.

AU - Morrod, J. K.

AU - Prior, K. A.

AU - Warburton, R. J.

PY - 2006/3

Y1 - 2006/3

N2 - We have determined the direct and exchange electron-electron and electron-hole Coulomb energies in CdSe/ZnSe quantum dots. The experiments are based on single dot photoluminescence at low temperature. By controlling the charging with a vertical transistor structure and by applying a symmetry-breaking magnetic field, we show how we can determine all the Coulomb energies. The direct Coulomb energies are responsible for large, ~20 meV, red-shifts of the emission on charging. The exchange Coulomb energies lead to a very pronounced fine structure splitting, up to 2.6 meV, for the neutral exciton. © 2006 WILEY-VCH Verlag GmbH & Co. KGaA.

AB - We have determined the direct and exchange electron-electron and electron-hole Coulomb energies in CdSe/ZnSe quantum dots. The experiments are based on single dot photoluminescence at low temperature. By controlling the charging with a vertical transistor structure and by applying a symmetry-breaking magnetic field, we show how we can determine all the Coulomb energies. The direct Coulomb energies are responsible for large, ~20 meV, red-shifts of the emission on charging. The exchange Coulomb energies lead to a very pronounced fine structure splitting, up to 2.6 meV, for the neutral exciton. © 2006 WILEY-VCH Verlag GmbH & Co. KGaA.

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U2 - 10.1002/pssb.200564654

DO - 10.1002/pssb.200564654

M3 - Article

SN - 0370-1972

VL - 243

SP - 782

EP - 786

JO - Physica Status Solidi B - Basic Research

JF - Physica Status Solidi B - Basic Research

IS - 4

ER -

Direct and exchange Coulomb energies in CdSe/ZnSe quantum dots

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