We show, using first-principles spin-polarized total-energy calculations, that depending on the spin configuration of the system, the reaction of an [Formula presented] molecule with a Si-Si bond in a suboxidized region might result either in a peroxy linkage defect (for a singlet spin state) or in a perfect Si-O-Si bond plus an interstitial O atom (for a triplet spin state). Even though the singlet has a lower energy than the triplet configuration, we find a rather small probability for triplet to singlet conversion. Therefore, as the [Formula presented] in an [Formula presented] interstitial site has a triplet configuration, this reaction spin dependence may have a strong influence on the high quality of the [Formula presented] interface.
ASJC Scopus subject areas
- Physics and Astronomy(all)