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
复制标题
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:
--
通讯作者:
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
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%.
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