title   
  

Strong dependence of dielectric properties on electrical boundary conditions and interfaces in ferroelectric superlattices

Mısırlıoğlu, Burç and Kesim, M. T. and Alpay, S. P. (2014) Strong dependence of dielectric properties on electrical boundary conditions and interfaces in ferroelectric superlattices. Applied Physics Letters, 104 (2). ISSN 0003-6951 (Print) 1077-3118 (Online)

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Official URL: http://dx.doi.org/10.1063/1.4862408

Abstract

A computational study based on Landau-Ginzburg-Devonshire theory is carried out to understand the role of interfaces on the dielectric response of ferroelectric superlattices. Using heteroepitaxial (001) PbZr0.3Ti0.7O3/(001)SrTiO3 heterostructures on (001)SrTiO3 as an example, we show that electrostatic boundary conditions have a pronounced effect on the dielectric response far below the ferroelectric phase transition temperature. For a fixed total multilayer thickness, the average dielectric response can be improved significantly for superlattices with a small layer periodicity. This is due to the large total internal electric fields at the interlayer interfaces which originate from the polarization mismatch between layers.

Item Type:Article
Additional Information:Article Number: 022906
Subjects:Q Science > QC Physics > QC501-766 Electricity and magnetism
Q Science > QC Physics > QC176-176.9 Solids. Solid state physics
ID Code:25704
Deposited By:Burç Mısırlıoğlu
Deposited On:15 Dec 2014 12:15
Last Modified:15 Dec 2014 12:15

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