Topology of the polarization field in ferroelectric nanowires from first principles
Topology of the polarization field in ferroelectric nanowires from first principles
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DOI：
10.1103/physrevb.81.172101
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发表时间：
2010-05-01
影响因子：
3.7
通讯作者：
Scott, J. F.
中科院分区：
文献类型：
--
作者：
Hong, Jiawang;Catalan, G.;Scott, J. F.
从第一性原理出发，研究了钛酸钡纳米线阵列截面极化场的行为。除了铁电纳米结构中已知的织构外，还得到了不同缠绕数的拓扑缺陷。它们是由表面效应和边缘效应施加在金属丝表面的图案向内调节而产生的。接近拓扑缺陷，在某些情况下，偏振场取向出基面，保持接近恒定的幅度，而在其他情况下，它几乎消失。
The behavior of the cross-sectional polarization field is explored for arrays of thin nanowires of barium titanate from first principles. Topological defects of different winding numbers have been obtained, beyond the known textures in ferroelectric nanostructures. They result from the inward accommodation of patterns imposed at the surface of the wire by surface and edge effects. Close to a topological defect, the polarization field orients out of the basal plane in some cases, maintaining a close to constant magnitude, whereas it virtually vanishes in other cases.