Effects of electron–hole correlation in quantum dots under high magnetic field (up to 45 T)

R. Cingolani, M. De Giorgi (Corresponding Author), R. Rinaldi, H. Lipsanen, M. 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 quantum dots (QD) has been studied by high-field (45 T) magneto-luminescence and by many-electron–many-hole Hartree–Fock calculations. The Darwin–Fock states of the dots are found to merge into a single 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)346-349
    Number of pages4
    JournalPhysica E: Low-Dimensional Systems and Nanostructures
    Volume7
    Issue number3-4
    DOIs
    Publication statusPublished - 2000
    MoE publication typeA1 Journal article-refereed

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    Cingolani, R., De Giorgi, M., Rinaldi, R., Lipsanen, H., Sopanen, M., Virkkala, R., Maijala, K., Tulkki, J., Ahopelto, J., Uchida, K., Miura, N., & Arakawa, Y. (2000). Effects of electron–hole correlation in quantum dots under high magnetic field (up to 45 T). Physica E: Low-Dimensional Systems and Nanostructures, 7(3-4), 346-349. https://doi.org/10.1016/S1386-9477(99)00338-0