Symmetry and Spin of the Decavacancy in Crystalline Si
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概要
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We report total-energy electronic-structure calculations based on the density-functional theory which clarify atomic structure, spin configuration and charge of the decavacancy V10 in crystalline Si. We have found that V10 is a negative-$U$ system due to substantial breathing relaxation of the surrounding atoms, which makes charge states ranging from +4 to $-4$ possible. We have also found that V10 exhibits various types of Jahn–Teller symmetry lowering in the atomic structure depending on the charge. Highly spin-polarized states are obtained in several charge states.
- 2010-09-15
著者
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Oshiyama Atsushi
CREST, Japan Science and Technology Agency, Chiyoda, Tokyo 102-0075, Japan
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Uchida Kazuyuki
CREST, Japan Science and Technology Agency, Chiyoda, Tokyo 102-0075, Japan