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.
|Number of pages||4|
|Journal||Physica E: Low-Dimensional Systems and Nanostructures|
|Publication status||Published - 2000|
|MoE publication type||A1 Journal article-refereed|
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