超晶格
铁电性
凝聚态物理
金茨堡-兰道理论
极化(电化学)
材料科学
朗道理论
电介质
相变
间断(语言学)
物理
光电子学
超导电性
化学
数学
物理化学
数学分析
出处
期刊:Solid State Phenomena
日期:2012-06-01
卷期号:189: 145-167
被引量:12
标识
DOI:10.4028/www.scientific.net/ssp.189.145
摘要
This article briefly reviews recent developments of Landau-Ginzburg theory to ferroelectric phase transitions in superlattices. An overview of the contributions of Landau-type theory to study ferroelectric superlattices is given. Recent findings from first-principles calculations and experiments on intermixing, local polarization coupling and polar discontinuity at interfaces that are not address in these contributions are highlighted. This is followed by a review of recent developments of Landau-Ginzburg theory that addresses these emergent phenomena at interfaces, which is the focus of this review article. The Landau-Ginzburg approach to ferroelectric superlattices with spatial distribution of polarization is outlined. It describes the formation of intermixed layer with properties different from those of both layers. These intermixed layers are mutually coupled through the local polarization at interfaces. Polarization continuity or continuity at interfaces is determined by the nature of the intermixed layer formed at the interface region. Recent results obtained in investigating superlattices comprised primarily of ferroelectric and paraelectric materials are discussed. The results include modulated polarizations, phase transitions, dielectric susceptibilities and switching behaviors.
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