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Nano Lett ; 12(6): 2846-51, 2012 Jun 13.
Article in English | 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.


Subject(s)
Magnetic Fields , Models, Chemical , Nanostructures/chemistry , Nanostructures/ultrastructure , Static Electricity , Computer Simulation , Electric Conductivity , Particle Size , Surface Properties
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