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

被引：19
|
作者：
Misirlioglu, I. B. [1 ]
Kesim, M. T. [2 ,3 ]
Alpay, S. P. [2 ,3 ,4 ]
机构：
[1] Sabanci Univ, Fac Engn & Nat Sci, TR-34956 Istanbul, Turkey
[2] Univ Connecticut, Dept Mat Sci & Engn, Storrs, CT 06269 USA
[3] Univ Connecticut, Inst Mat Sci, Storrs, CT 06269 USA
[4] Univ Connecticut, Dept Phys, Storrs, CT 06269 USA
来源：
APPLIED PHYSICS LETTERS | 2014年 / 104卷 / 02期
关键词：
THIN-FILMS; PHASE-TRANSITIONS; BATIO3/SRTIO3; SUPERLATTICES; MULTILAYERS; GROWTH;
D O I：
10.1063/1.4862408
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
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. (C) 2014 AIP Publishing LLC.
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页数：5
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