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)
This is the latest version of this item.
Official URL: http://dx.doi.org/10.1063/1.4862408
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.
Available Versions of this Item
Repository Staff Only: item control page