Conservation of dielectric constant upon amorphization in perovskite oxides (Articolo in rivista)

Type
Label
  • Conservation of dielectric constant upon amorphization in perovskite oxides (Articolo in rivista) (literal)
Anno
  • 2007-01-01T00:00:00+01:00 (literal)
Alternative label
  • Delugas, P; Fiorentini, V; Filippetti, A; Pourtois, G (2007)
    Conservation of dielectric constant upon amorphization in perovskite oxides
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Delugas, P; Fiorentini, V; Filippetti, A; Pourtois, G (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 76 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • NXP Semicond, B-3001 Louvain, Belgium; Univ Cagliari, INFM, CNR, SLACS,Dipartimento Fis,Sardinian Lab Computat Mat, I-09042 Monserrato, Italy; IMEC, B-3001 Louvain, Belgium (literal)
Titolo
  • Conservation of dielectric constant upon amorphization in perovskite oxides (literal)
Abstract
  • We report calculations indicating that amorphous RAO(3) oxides, with R and A trivalent cations, have approximately the same static dielectric constant as their perovskite crystal phase. The effect is due to the disorder-activated polar response of nonpolar crystal modes at low frequency, which compensates a moderate but appreciable reduction of the ionic dynamical charges. The dielectric response was studied via density-functional perturbation theory. Amorphous samples were generated by molecular dynamics melt-and-quench simulations. (literal)
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