We report on Coulomb correlation effects in the luminescence of strain-induced quantum dots. In single dots, under low power excitation, we observe the rising of sharp lines associated to the formation of excitonic molecules. In the grand-ensemble, in magnetic fields up to 45 T, we observe Darwin-Fock stales of the dots to merge into a unique Landau level, with a considerable reduction in the total diamagnetic shift due to the enhanced electron-hole correlation caused by the increased degeneracy of the slate.
Correlation effects in strain-induced quantum dots / Rinaldi, R; Devittorio, M; Cingolani, R; Hohenester, U; Molinari, Elisa; Lipsanen, H; Tulkki, J; Ahopelto, J; Uchida, K; Miura, N; Arakawa, Y.. - In: PHYSICA STATUS SOLIDI B-BASIC RESEARCH. - ISSN 0370-1972. - STAMPA. - 224:2(2001), pp. 361-366. [10.1002/1521-3951(200103)224:2<361::AID-PSSB361>3.0.CO;2-Z]
Correlation effects in strain-induced quantum dots
MOLINARI, Elisa;
2001
Abstract
We report on Coulomb correlation effects in the luminescence of strain-induced quantum dots. In single dots, under low power excitation, we observe the rising of sharp lines associated to the formation of excitonic molecules. In the grand-ensemble, in magnetic fields up to 45 T, we observe Darwin-Fock stales of the dots to merge into a unique Landau level, with a considerable reduction in the total diamagnetic shift due to the enhanced electron-hole correlation caused by the increased degeneracy of the slate.
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