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- W2045686945 abstract "We investigate the electronic structure of gap and band tail states in amorphous silicon. Starting with two 216-atom models of amorphous silicon with defect concentration close to the experiments, we systematically study the dependence of electron localization on basis set, density functional and spin polarization using the first principles density functional code Siesta. We briefly compare three different schemes for characterizing localization: information entropy, inverse participation ratio and spatial variance. Our results show that to accurately describe defect structures within self consistent density functional theory, a rich basis set is necessary. Our study revealed that the localization of the wave function associated with the defect states decreases with larger basis sets and there is some enhancement of localization from GGA relative to LDA. Spin localization results obtained via LSDA calculations, are in reasonable agreement with experiment and with previous LSDA calculations on a-Si:H models." @default.
- W2045686945 created "2016-06-24" @default.
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- W2045686945 date "2004-02-26" @default.
- W2045686945 modified "2023-10-17" @default.
- W2045686945 title "Systematic study of electron localization in an amorphous semiconductor" @default.
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- W2045686945 doi "https://doi.org/10.1103/physrevb.69.085207" @default.
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