Electron-Hole Correlation in Quantum Dots under a High Magnetic Field (up to 45 T)

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© 1999 American Physical Society (APS). http://www.aps.org/

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Journal Title

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Volume Title

School of Electrical Engineering | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

Date

1999

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Mcode

Degree programme

Language

en

Pages

4832-4835

Series

Phys. Rev. Lett., Volume 83, Issue 23

Abstract

The influence of the direct and exchange Coulomb interaction on Landau level formation in strain induced quantum dots has been studied by high-field (45 T) magnetoluminescence and by many-electron many-hole Hartree-Fock calculations. The Darwin Fock states of the dots are found to merge into a unique Landau level at very high fields with a considerable reduction in the total diamagnetic shift due to the enhanced electron-hole correlation caused by the increased degeneracy of the state. We calculate a 50% reduction of the diamagnetic shift as a result of direct and exchange Coulomb interaction in the squeezed carrier states, in excellent agreement with the experimental findings.

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Keywords

quantum dots, Coulomb interaction, Landau level formation, Hartree-Fock calculations

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Citation

Cingolani, R. & Rinaldi, R. & Lipsanen, Harri & Sopanen, M. & Virkkala, R. & Maijala, K. & Tulkki, J. & Ahopelto, J. & Uchida, K. & Miura, N. & Arakawa, Y. 1999. Electron-Hole Correlation in Quantum Dots under a High Magnetic Field (up to 45 T). Phys. Rev. Lett. Volume 83, Issue 23. P. 4832-4835. ISSN 0031-9007 (printed). DOI: 10.1103/physrevlett.83.4832.