Unconventional crystal-field splitting in noncentrosymmetric BaTiO3 thin films
Unconventional crystal-field splitting in noncentrosymmetric BaTiO3 thin films
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DOI：
10.1103/physrevmaterials.4.024413
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发表时间：
2019-08
影响因子：
3.4
通讯作者：
Yang Song;Xiaoran Liu;Fangdi Wen;M. Kareev;Ruyi Zhang;Yujuan Pei;Jiachang Bi;P. Shafer;
中科院分区：
文献类型：
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作者：
Yang Song;Xiaoran Liu;Fangdi Wen;M. Kareev;Ruyi Zhang;Yujuan Pei;Jiachang Bi;P. Shafer;
作者：宋，Y；刘,X;温,F;Kareev, M;张,R;裴,Y;Bi, J;沙佛,P;恩迪亚耶,;Arenholz E;公园,SY;曹,Y;摘要：©2020美国物理学会。了解非中心对称系统如铁电材料中的晶体场分裂和轨道极化是非常重要的。在本研究中，我们以BaTiO3为代表材料，研究了在til2,3边缘具有共振x射线线性二色性的非中心对称TiO6八面体中钛的晶体场分裂和轨道极化。采用脉冲激光沉积法在DyScO3（110）单晶衬底上逐层沉积高质量的BaTiO3薄膜。利用反射高能电子衍射和元素特异性x射线吸收光谱对薄膜的结构和电子性能进行了表征。与传统的晶体场分裂和轨道构型（dxz/dyz）形成鲜明对比
Author(s): Song, Y; Liu, X; Wen, F; Kareev, M; Zhang, R; Pei, Y; Bi, J; Shafer, P; N'Diaye, AT; Arenholz, E; Park, SY; Cao, Y; Chakhalian, J | Abstract: © 2020 American Physical Society. Understanding the crystal-field splitting and orbital polarization in noncentrosymmetric systems such as ferroelectric materials is fundamentally important. In this study, taking BaTiO3 as a representative material, we investigate titanium crystal-field splitting and orbital polarization in noncentrosymmetric TiO6 octahedra with resonant x-ray linear dichroism at the Ti L2,3 edge. The high-quality BaTiO3 thin films were deposited on DyScO3 (110) single crystal substrates in a layer-by-layer way by pulsed laser deposition. The reflection high-energy electron diffraction and element specific x-ray absorption spectroscopy were performed to characterize the structural and electronic properties of the films. In sharp contrast to conventional crystal-field splitting and orbital configuration (dxz/dyz