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- W2112554416 abstract "Crystalline structures, zone-center phonon modes, and the related dielectric response of the three low-pressure phases of HfO2 have been investigated in density-functional theory using ultrasoft pseudopotentials and a plane-wave basis. The structures of low-pressure HfO2 polymorphs are carefully studied with both the local-density approximation (LDA) and the generalized gradient approximation (GGA). The fully relaxed structures obtained with either exchange-correlation scheme agree reasonably well with experiment, although LDA yields better overall agreement. After calculating the Born effective charge tensors and the force-constant matrices by finite-difference methods, the lattice dielectric susceptibility tensors for the three HfO2 phases are computed by decomposing the tensors into the contributions from individual infrared-active phonon modes." @default.
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- W2112554416 date "2002-06-13" @default.
- W2112554416 modified "2023-10-10" @default.
- W2112554416 title "First-principles study of structural, vibrational, and lattice dielectric properties of hafnium oxide" @default.
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- W2112554416 doi "https://doi.org/10.1103/physrevb.65.233106" @default.
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