Dielectric anomalies in ferroelectric nanostructures (Articolo in rivista)

Type
Label
  • Dielectric anomalies in ferroelectric nanostructures (Articolo in rivista) (literal)
Anno
  • 2007-01-01T00:00:00+01:00 (literal)
Alternative label
  • Ponomareva, I; Bellaiche, L; Resta, R (2007)
    Dielectric anomalies in ferroelectric nanostructures
    in Physical review letters (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Ponomareva, I; Bellaiche, L; Resta, R (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 99 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Univ Arkansas, Dept Phys, Fayetteville, AR 72701 USA; Univ Trieste, Dipartimento Fis Teor, I-34014 Trieste, Italy; INFM DEMOCRITOS Natl Simulat Ctr, I-34014 Trieste, Italy (literal)
Titolo
  • Dielectric anomalies in ferroelectric nanostructures (literal)
Abstract
  • First-principles-based methods are used to determine the external dielectric susceptibility (i.e., the polarization response to the external electric field) and the internal susceptibility (i.e., the polarization response to the average internal field) in ferroelectric dots, wires, and films, as a function of the electrical boundary conditions. While the external susceptibility is obviously positive, we find that the internal one is negative over a wide range of boundary conditions for all kinds of nanostructures. A Landau-type phenomenological model provides a rationale for all of our findings. (literal)
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