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- W2095403971 abstract "We present the structural as well as elastic properties of the alkaline earth oxides and FeO, calculated using hybrid exchange functionals within DFT. We show that by empirically fitting the amount of Fock-exchange in the hybrid functionals, we can accurately reproduce the pressure-induced phase transitions for MgO, CaO, SrO and BaO. For FeO the hybrid functionals predict an insulator↔metal transition at ca. 150 GPa, associated with an i-B8↔B8 structural phase transition. The structural phase transition is accompanied by a spin transition from a high- to low-spin electron configuration on the Fe2+ ions. Hence, FeO undergoes a magnetic phase transition from an anti-ferromagnetic to non-magnetic structure. We also find that as the ionicity of the polymorphs increases a higher fraction of Fock-exchange is required to reproduce the structural volumes reported from experiments." @default.
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- W2095403971 date "2005-04-01" @default.
- W2095403971 modified "2023-09-25" @default.
- W2095403971 title "Structural and magnetic phase transitions in simple oxides using hybrid functionals" @default.
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- W2095403971 doi "https://doi.org/10.1080/08927020500066684" @default.
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