Electron-hole correlation in quantum dots under a high magnetic field (up to 45T)

R. Cingolani, R. Rinaldi, H. Lipsanen, M. Sopanen, R. Virkkala, K. Maijala, Jukka Tulkki, J. 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 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.
Original languageEnglish
Pages (from-to)4832-4835
Number of pages4
JournalPhysical Review Letters
Volume83
Issue number23
DOIs
Publication statusPublished - 6 Dec 1999
MoE publication typeA1 Journal article-refereed

Keywords

  • magnetic field
  • quantum dot

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