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- W170209685 abstract "We present a review of our symmetry-based tight-binding (TB) approach for calculating the electronic structure and optical transitions in semiconductor quantum dots (QD's) and quantum dot quantum wells (QDQW's). It is based on the semi-empirical sp 3 s* model, including the spin-orbit interaction, which accounts for the main features of the bulk semiconductor band structure. Exact diagonalization of the one-electron TB Hamiltonian by using group-theoretical methods yields the full single-particle spectrum including the symmetry classification of the eigenstates. We next deduce the low-energy exciton spectrum in the configuration-interaction approach and thus obtain the optical gap and the photoluminescence Stokes shifts. The high-energy absorption spectra are also computed. Our method has so far been applied to CdTe and CdSe QD's and CdS/HgS/CdS QDQW's of overall diameter up to 6 nm. The results show satisfactory agreement with the available experimental data, providing a unified picture of the optical properties." @default.
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- W170209685 date "2003-11-01" @default.
- W170209685 modified "2023-09-27" @default.
- W170209685 title "Optical properties of semiconductor nanocrystals: A symmetry-based tight-binding approach" @default.
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