Influence of Coulomb and exchange interaction on quantum dot magnetoluminescence up to B = 45 T

R. Cingolani, R. Rinaldi, Harri Lipsanen, Markku Sopanen, R. Virkkala, K. Maijala, J. Tulkki, Jouni Ahopelto, K. Uchida, N. Miura, Y. Arakawa

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Abstract

The influence of the direct and exchange Coulomb interaction on Landau level formation in strain induced QD has been studied by high‐field (45 T) magneto‐luminescence measurements and by many‐electron many‐hole Hartree‐Fock calculations. At high magnetic fields the degeneracy of the QD electron and hole ground states is increased as several zero‐field eigenstates merge into the lowest Landau level. This leads to removal of the state filling and accordingly in high magnetic field the QD luminescence is emitted from the lowest Landau level. Using a generalization of Koopmans theorem for electron–hole many particle systems, we have studied the enhancement of the direct and exchange Coulomb interaction in squeezed carrier states. The results show that for 6 to 8 electron–hole pairs the direct and exchange interaction both reduce the diamagnetic shift by 15 to 25%.
Original languageEnglish
Pages (from-to)263 - 268
Number of pages6
JournalPhysica Status Solidi A: Applied Research
Volume178
Issue number1
DOIs
Publication statusPublished - 2000
MoE publication typeA1 Journal article-refereed

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Exchange interactions
Coulomb interactions
Semiconductor quantum dots
quantum dots
Magnetic fields
Ground state
Luminescence
interactions
magnetic fields
Electrons
eigenvectors
theorems
luminescence
ground state
augmentation
shift
electrons

Cite this

Cingolani, R. ; Rinaldi, R. ; Lipsanen, Harri ; Sopanen, Markku ; Virkkala, R. ; Maijala, K. ; Tulkki, J. ; Ahopelto, Jouni ; Uchida, K. ; Miura, N. ; Arakawa, Y. / Influence of Coulomb and exchange interaction on quantum dot magnetoluminescence up to B = 45 T. In: Physica Status Solidi A: Applied Research. 2000 ; Vol. 178, No. 1. pp. 263 - 268.
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title = "Influence of Coulomb and exchange interaction on quantum dot magnetoluminescence up to B = 45 T",
abstract = "The influence of the direct and exchange Coulomb interaction on Landau level formation in strain induced QD has been studied by high‐field (45 T) magneto‐luminescence measurements and by many‐electron many‐hole Hartree‐Fock calculations. At high magnetic fields the degeneracy of the QD electron and hole ground states is increased as several zero‐field eigenstates merge into the lowest Landau level. This leads to removal of the state filling and accordingly in high magnetic field the QD luminescence is emitted from the lowest Landau level. Using a generalization of Koopmans theorem for electron–hole many particle systems, we have studied the enhancement of the direct and exchange Coulomb interaction in squeezed carrier states. The results show that for 6 to 8 electron–hole pairs the direct and exchange interaction both reduce the diamagnetic shift by 15 to 25{\%}.",
author = "R. Cingolani and R. Rinaldi and Harri Lipsanen and Markku Sopanen and R. Virkkala and K. Maijala and J. Tulkki and Jouni Ahopelto and K. Uchida and N. Miura and Y. Arakawa",
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Cingolani, R, Rinaldi, R, Lipsanen, H, Sopanen, M, Virkkala, R, Maijala, K, Tulkki, J, Ahopelto, J, Uchida, K, Miura, N & Arakawa, Y 2000, 'Influence of Coulomb and exchange interaction on quantum dot magnetoluminescence up to B = 45 T', Physica Status Solidi A: Applied Research, vol. 178, no. 1, pp. 263 - 268. https://doi.org/10.1002/1521-396X(200003)178:1<263::AID-PSSA263>3.0.CO;2-U

Influence of Coulomb and exchange interaction on quantum dot magnetoluminescence up to B = 45 T. / Cingolani, R.; Rinaldi, R.; Lipsanen, Harri; Sopanen, Markku; Virkkala, R.; Maijala, K.; Tulkki, J.; Ahopelto, Jouni; Uchida, K.; Miura, N.; Arakawa, Y.

In: Physica Status Solidi A: Applied Research, Vol. 178, No. 1, 2000, p. 263 - 268.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Influence of Coulomb and exchange interaction on quantum dot magnetoluminescence up to B = 45 T

AU - Cingolani, R.

AU - Rinaldi, R.

AU - Lipsanen, Harri

AU - Sopanen, Markku

AU - Virkkala, R.

AU - Maijala, K.

AU - Tulkki, J.

AU - Ahopelto, Jouni

AU - Uchida, K.

AU - Miura, N.

AU - Arakawa, Y.

PY - 2000

Y1 - 2000

N2 - The influence of the direct and exchange Coulomb interaction on Landau level formation in strain induced QD has been studied by high‐field (45 T) magneto‐luminescence measurements and by many‐electron many‐hole Hartree‐Fock calculations. At high magnetic fields the degeneracy of the QD electron and hole ground states is increased as several zero‐field eigenstates merge into the lowest Landau level. This leads to removal of the state filling and accordingly in high magnetic field the QD luminescence is emitted from the lowest Landau level. Using a generalization of Koopmans theorem for electron–hole many particle systems, we have studied the enhancement of the direct and exchange Coulomb interaction in squeezed carrier states. The results show that for 6 to 8 electron–hole pairs the direct and exchange interaction both reduce the diamagnetic shift by 15 to 25%.

AB - The influence of the direct and exchange Coulomb interaction on Landau level formation in strain induced QD has been studied by high‐field (45 T) magneto‐luminescence measurements and by many‐electron many‐hole Hartree‐Fock calculations. At high magnetic fields the degeneracy of the QD electron and hole ground states is increased as several zero‐field eigenstates merge into the lowest Landau level. This leads to removal of the state filling and accordingly in high magnetic field the QD luminescence is emitted from the lowest Landau level. Using a generalization of Koopmans theorem for electron–hole many particle systems, we have studied the enhancement of the direct and exchange Coulomb interaction in squeezed carrier states. The results show that for 6 to 8 electron–hole pairs the direct and exchange interaction both reduce the diamagnetic shift by 15 to 25%.

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JO - Physica Status Solidi A: Applications and Materials Science

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