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S. I. Pokutnyi
«Spatially Indirect Excitons’ Spectroscopy in Germanium Quantum Dots»
PACS numbers: 71.35.Ee, 73.20.Mf, 73.21.La
As shown, taking into account the centrifugal energy in the Hamiltonian of an exciton with spatially separated electron and hole (the hole moves in the germanium quantum dot, and the electron is localized over the spherical interface of the silicon matrix–quantum dot) leads to the appearance of quasi-stationary states in the zone of surface exciton states, which transform into stationary states with increasing quantum dot radius. As determined, the absorption spectra of the nanosystem interband consist of energy bands, which are formed by electron transitions between quasi-stationary and stationary states, and the intraband absorption spectra consist of zones formed by electron transitions between stationary states.
Keywords: indirect excitons, quasi-stationary states, quantum dots
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