Electrostatic coupling and local structural distortions at interfaces in ferroelectric/paraelectric superlattices.
Nano Lett
; 12(6): 2846-51, 2012 Jun 13.
Article
em En
| MEDLINE
| ID: mdl-22591200
ABSTRACT
The performance of ferroelectric devices is intimately entwined with the structure and dynamics of ferroelectric domains. In ultrathin ferroelectrics, ordered nanodomains arise naturally in response to the presence of a depolarizing field and give rise to highly inhomogeneous polarization and structural profiles. Ferroelectric superlattices offer a unique way of engineering the desired nanodomain structure by modifying the strength of the electrostatic interactions between different ferroelectric layers. Through a combination of X-ray diffraction, transmission electron microscopy, and first-principles calculations, the electrostatic coupling between ferroelectric layers is studied, revealing the existence of interfacial layers of reduced tetragonality attributed to inhomogeneous strain and polarization profiles associated with the domain structure.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Nanoestruturas
/
Eletricidade Estática
/
Campos Magnéticos
/
Modelos Químicos
Idioma:
En
Revista:
Nano Lett
Ano de publicação:
2012
Tipo de documento:
Article
País de afiliação:
Suíça