IntroductionFerroelectric heterostructures or multilayers have attracted enormous interests in recent years for their intriguing physical performance. Experimental results revealed larger polarization, dielectric, tunibility, and antiferroelectriclike hysteresis loop etc. in ferroelectric heterostructures or multibilayers. In view of theoretical analysis, some major factors affecting ferroelectric heterostructures characteristics are regarded as misfit strain, interfacial coupling, inhomogeneous polarization near interface, composition effects, layer thickness, space charge. Thus, lots of researchers established various theoretical models of ferroelectric heterostructures, superlattice structures, or bilayers to investigate the influence of the above factors on the properties of these systems.In the beginning, theorists studied the static properties of these systems using the Landau type theory or transverse Ising model, and obtained some interesting phenomena. In order to approach the realistic applications, some researchers were dedicated to investigating the dynamic characteristics by means of Landau–Devonshire theory combined with Landau–Khalatnikov dynamic equation. Ong et al. have studied the dynamic properties of ferroelectric superlattices using Landau–Khalatnikov equation, and revealed that the characteristics may be affected by layer thickness, interfacial coupling, surface effects etc. However, their model is step‐like structure varying that will lead to the unphysical pictures. Cui et al. have presented a more realistic model to study the dynamic properties
Physica Status Solidi (B) Basic Solid State Physics – Wiley
Published: Jan 1, 2018
Keywords: ; ;
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