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表面效应对铁电纳米线性能的影响

Influence of Surface Effect on the Ferroelectric Behavior of Nanowire
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摘要 在Landau-Ginsburg-Devonshire(LGD)理论的基础上,建立了铁电纳米线的理论模型,并通过与第一原理计算结果的对比,建立了一种获取外延长度的新方法.对于Pb(Zr0.5Ti0.5)O3(PZT)纳米线,其外延长度为20 nm.计算结果表明,在PZT纳米线中存在0.8 nm的临界直径,同时揭示了纳米线的表面效应对其铁电性能的抑制作用. A model for ferroelectric nanowire calculation was established based on the Landau - Ginsburg - Devonshire(LGD) theory and a new method to obtain the extrapolation length was developed. It is revealed that the extrapolation length of Pb(Zr0.5Ti0.5 )O3 (PZT) nanowire is 20 nm and its critical diameter is 0.8 nm. Our results further show that the surface effect suppresses the ferroelectricity in the PZT nanowire.
出处 《郑州大学学报(工学版)》 CAS 2008年第4期1-5,共5页 Journal of Zhengzhou University(Engineering Science)
基金 国家自然科学基金资助项目(10572069 10121202)
关键词 LGD理论 外延长度 PZT纳米线 LGD theory extrapolation length PZT nanowire
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参考文献21

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