Ab initioband-structure calculations for alkaline-earth oxides and sulfides

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Abstract
The electronic structure of the oxides and sulfides of Mg, Ca, and Sr is computed with use of the self-consistent Hartree-Fock method including correlation. Energy-band structure and density of states are presented and discussed in context with the available experimental and theoretical studies. Our results predict that these materials (except MgS) are direct-band-gap materials.