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

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

    Research output: Contribution to journalArticleScientificpeer-review

    20 Citations (Scopus)


    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
    Issue number23
    Publication statusPublished - 1999
    MoE publication typeA1 Journal article-refereed


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