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- W2091656885 abstract "We present an ab initio plane-wave-pseudopotential investigation of Si- (Ge-)capped Ge (Si) nanocrystallites. The effects of capping Si and Ge nanocrystallites on the electron-hole pair excitation energies, optical absorption spectra, localization of the highest-occupied and lowest-unoccupied molecular orbitals, Stokes shifts, and radiative lifetimes are analyzed. The bond lengths and the localization of electrons and holes in the Si- (Ge-)capped nanocrystallites are similar to those found in the analogous $mathrm{Si}∕mathrm{Ge}$ heterostructures. Due to the changes in the quantum confinement properties caused by the capping, there are significant differences in the electronic and optical properties of Ge-capped Si nanocrystallites and Si-capped Ge nanocrystallites." @default.
- W2091656885 created "2016-06-24" @default.
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- W2091656885 date "2005-07-22" @default.
- W2091656885 modified "2023-09-25" @default.
- W2091656885 title "Quantum confinement in Si- and Ge-capped nanocrystallites" @default.
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- W2091656885 doi "https://doi.org/10.1103/physrevb.72.045351" @default.
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