Tunable oxygen vacancy configuration by strain engineering in perovskite ferroelectrics from first-principles study

Tunable oxygen vacancy configuration by strain engineering in perovskite ferroelectrics from first-principles study
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第一性原理研究通过应变工程调节钙钛矿铁电体中的氧空位配置

DOI:
10.1063/1.4824215
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发表时间:
2013-10
期刊:
影响因子:
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通讯作者:
X. J. Lou
X. J. Lou
中科院分区:
--
文献类型:
--
作者:
Q. Yang;J. X. Cao;Y. C. Zhou;Y. Zhang;Y. Ma;X. J. Lou

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全面的第一性原理计算表明,原型钙钛矿氧化物PbTiO 3(PTO)的氧空位(VO)的配置可以通过应变工程来调整。值得注意的是,我们发现,VO位于沿着c轴(Vc),通常导致在无应变PTO(Vcud)中的极化损害尾到尾域配置,可以很容易地调整到极化无害的头到尾域配置(Vcsw)通过施加3%的ab-双轴压缩应变。此外,位于ab平面(Vab)中的VO,另一种类型的偏振无害空位,可以通过施加2%的压缩应变来稳定。
Comprehensive first-principle calculations indicate that the oxygen vacancy (VO) configuration of a prototypical perovskite oxide PbTiO3 (PTO) can be tuned by strain engineering. Remarkably, we found that VO located along the c axis (Vc), normally resulting in a polarization-harming tail-to-tail domain configuration in strain-free PTO (Vcud), can be readily tuned to a polarization-harmless head-to-tail domain configuration (Vcsw) by applying an ab-biaxial compressive strain of 3%. Also, VO located in the ab-plane (Vab), another type of polarization-harmless vacancy, can be stabilized by applying a compressive strain of 2%.
DOI: 10.1080/00150199308008705
发表时间: 1993-12
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