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The evolution of polarization inside ultrathin PbTiO3 films: a theoretical study
Xue, Y. B.; Chen, D.; Wang, Y. J.; Tang, Y. L.; Zhu, Y. L.; Ma, X. L.
通讯作者Chen, D.(dchen@imr.ac.cn)
2015-07-03
发表期刊PHILOSOPHICAL MAGAZINE
ISSN1478-6435
卷号95期号:19页码:2067-2077
摘要How to control the material properties by manipulating the unitcell thickness is crucial for applications of ferroelectric ultrathin films. To understand the polarization behaviour of ultrathin PbTiO3 (PTO) films grown on SrTiO3 (STO) substrate, we have systematically explored the strength and direction of polarization in each unitcell layer, using density functional theory combined with Born effective charge method. Strikingly, we find that the polar state of ultrathin PTO films is a composite result depending not only on thickness but also on boundary condition, initial polarization direction, etc. Besides, we also studied the surface effect on the polarization in the thicker PTO films for comparison with the ultrathin ones, which suggests that the surface effect is basically confined in a small range (3-5 unitcells thick at surface region) no matter what kinds of surface terminations and polarization directions.
关键词ultrathin films first-principles calculation polarization
资助者National Natural Science Foundation of China ; National Basic Research Program of China
DOI10.1080/14786435.2015.1047810
收录类别SCI
语种英语
资助项目National Natural Science Foundation of China[51231007] ; National Natural Science Foundation of China[51171190] ; National Natural Science Foundation of China[51371176] ; National Natural Science Foundation of China[51401212] ; National Basic Research Program of China[2014CB921002]
WOS研究方向Materials Science ; Mechanics ; Metallurgy & Metallurgical Engineering ; Physics
WOS类目Materials Science, Multidisciplinary ; Mechanics ; Metallurgy & Metallurgical Engineering ; Physics, Applied ; Physics, Condensed Matter
WOS记录号WOS:000356960700004
出版者TAYLOR & FRANCIS LTD
引用统计
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/80979
通讯作者Chen, D.
作者单位Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China
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Xue, Y. B.,Chen, D.,Wang, Y. J.,et al. The evolution of polarization inside ultrathin PbTiO3 films: a theoretical study[J]. PHILOSOPHICAL MAGAZINE,2015,95(19):2067-2077.
APA Xue, Y. B.,Chen, D.,Wang, Y. J.,Tang, Y. L.,Zhu, Y. L.,&Ma, X. L..(2015).The evolution of polarization inside ultrathin PbTiO3 films: a theoretical study.PHILOSOPHICAL MAGAZINE,95(19),2067-2077.
MLA Xue, Y. B.,et al."The evolution of polarization inside ultrathin PbTiO3 films: a theoretical study".PHILOSOPHICAL MAGAZINE 95.19(2015):2067-2077.
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