Reorientable dipolar Cu-Ca antisite and anomalous screening in CaCu3Ti4O12 (Articolo in rivista)

Type
Label
  • Reorientable dipolar Cu-Ca antisite and anomalous screening in CaCu3Ti4O12 (Articolo in rivista) (literal)
Anno
  • 2010-01-01T00:00:00+01:00 (literal)
Alternative label
  • Delugas, Pietro; Alippi, Paola; Fiorentini, Vincenzo; Raineri, Vito (2010)
    Reorientable dipolar Cu-Ca antisite and anomalous screening in CaCu3Ti4O12
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Delugas, Pietro; Alippi, Paola; Fiorentini, Vincenzo; Raineri, Vito (literal)
Pagina inizio
  • 081104 (literal)
Pagina fine
  • 081104 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 81 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1. CNR, IMM, I-95121 Catania, Italy 2. Univ Cagliari, IOM, SLACS, CNR, I-09042 Cagliari, Italy 3. Univ Cagliari, Dipartimento Fis, I-09042 Cagliari, Italy 4. CNR, ISM, I-00016 Monterotondo, Italy (literal)
Titolo
  • Reorientable dipolar Cu-Ca antisite and anomalous screening in CaCu3Ti4O12 (literal)
Abstract
  • Based on first-principles calculations, we show that the abundant Cu-Ca antisite defect contributes sizably to dielectric screening in single-crystal CaCu3Ti4O12. Cu-Ca has a multi-minimum off-center equilibrium configuration, whereby it possesses a large and easily reorientable dipole moment. The low-temperature and frequency cut-off behavior of Cu-Ca-induced response is consistent with experiment. (literal)
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