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- W2025052510 abstract "We report first-principle total-energy calculations that provide stable and metastable geometries and diffusion mechanisms of boron in ${mathrm{SiO}}_{2}$ with point defects which contain O vacancies and O interstitials. We find that a B atom forms various stable and metastable geometries in ${mathrm{SiO}}_{2}$ with point defects, depending on its charge state and surrounding environments. We also perform calculations that clarify the chemical feasibility of bonding configurations between a B atom and constituent atoms in ${mathrm{SiO}}_{2}.$ It is found that wave function distribution around the impurity and its occupation are essential to determine the geometry for each charge state. Binding energies of a B atom with constituent atoms in ${mathrm{SiO}}_{2}$ are decisive factors to the bond configuration around the B atom. In the case of B in ${mathrm{SiO}}_{2}$ with an O interstitial, a B atom forms a very stable B-O complex in which the B atom is bound to the O interstitial. Once the B-O complex is formed, the B atom diffuses via the ${mathrm{SiO}}_{2}$ network keeping this B-O unit with unexpectedly small activation energies of 2.1--2.3 eV. The calculated activation energies agree well with the data experimentally available." @default.
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- W2025052510 date "2003-11-21" @default.
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- W2025052510 title "First-principles calculations of boron-related defects in<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>SiO</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>" @default.
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- W2025052510 doi "https://doi.org/10.1103/physrevb.68.184112" @default.
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