Polarization enhancement in short period superlattices via interfacial intermixing

被引：42

作者：

Cooper, Valentino R.

Johnston, Karen

Rabe, Karin M.

机构：

[1] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA

[2] Helsinki Univ Technol, Phys Lab, Espoo 02015, Finland

来源：

PHYSICAL REVIEW B | 2007年 / 76卷 / 02期

关键词：

D O I：

10.1103/PhysRevB.76.020103

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of intermixing at the interface of short period PbTiO(3)/SrTiO(3) superlattices is studied using first-principles density functional theory. The results indicate that interfacial intermixing significantly enhances the polarization within the superlattice. This enhancement is directly related to the off-centering of Pb and Sr cations and can be explained through a discussion of interacting dipoles. This picture should be general for a wide range of multicomponent superlattices and may have important consequences for the design of ferroelectric devices.

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页数：4

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