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- W1998884169 abstract "A linear M-O-M (M=metal, O=oxygen) cluster embedded in a Madelung field, and also including the quantum effects of the neighboring ions, is used to represent the alkaline-earth oxides. For this model an ab initio wave function is constructed as a linear combination of Slater determinants written in an atomic orbital basis set, i.e., a valence-bond wave function. Each valence-bond determinant (or group of determinants) corresponds to a resonating valence-bond structure. We have obtained ab initio valence-bond cluster-model wave functions for the electronic ground state and the excited states involved in the optical-gap transitions. Numerical results are reasonably close to the experimental values. Moreover, the model contains the ionic model as a limiting case and can be readily extended and improved." @default.
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- W1998884169 date "1993-03-15" @default.
- W1998884169 modified "2023-09-28" @default.
- W1998884169 title "Ab initiovalence-bond cluster model for ionic solids: Alkaline-earth oxides" @default.
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- W1998884169 doi "https://doi.org/10.1103/physrevb.47.6207" @default.
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