Nanoscale design of polarization in ultrathin ferroelectric heterostructures.
Nanoscale design of polarization in ultrathin ferroelectric heterostructures.
复制标题
DOI：
10.1038/s41467-017-01620-2
复制
发表时间：
2017-11-10
影响因子：
16.6
通讯作者：
Trassin M
中科院分区：
文献类型：
--
作者：
De Luca G;Strkalj N;Manz S;Bouillet C;Fiebig M;Trassin M
氧化物电子学的成功取决于设计功能特性的能力，如原子精度的铁电性。然而，尽管在铁电异质结构的巨大进步，发展到多级架构与精确的逐层命令的极化是由缺乏连续控制的静电，应变，化学和膜厚度的平衡在生长过程中受到阻碍。此外，当这些层被正在进行的沉积掩埋时，更深层中的极化变得不可接近。以铁电BaTiO_3和多铁BiFeO_3为模型体系，对异质结中铁电极化的产生、取向和相互作用进行了单层精度的观测和工程设计。我们通过光学二次谐波产生来实现这一点，该光学二次谐波产生在整个沉积过程中以真实的时间跟踪自发极化的演变。这种直接和原位访问的极化过程中的增长，使我们的异质结构与用户定义的极化序列，对一类新的功能铁电材料。铁电异质结构具有一系列的功能特性，但控制它们的生长仍然是一个挑战。De Luca等人，展示了原位光学二次谐波产生，以监测和定制多层钛酸钡和铁酸铋薄膜的偏振和生长。
The success of oxide electronics depends on the ability to design functional properties such as ferroelectricity with atomic accuracy. However, despite tremendous advances in ferroelectric heterostructures, the development towards multilevel architectures with precise layer-by-layer command over the polarization is impeded by the lack of continuous control over the balance of electrostatics, strain, chemistry and film thickness during growth. Moreover, the polarization in the deeper layers becomes inaccessible when these are buried by the ongoing deposition. Taking ferroelectric BaTiO3 and multiferroic BiFeO3 as model systems, we observe and engineer the emergence, orientation and interaction of ferroelectric polarization in ultrathin heterostructures with monolayer accuracy. We achieve this by optical second harmonic generation which tracks the evolution of spontaneous polarization in real time throughout the deposition process. Such direct and in situ access to the polarization during growth leads us to heterostructures with user-defined polarization sequences—towards a new class of functional ferroic materials. Ferroelectric heterostructures exhibit a range of functional properties; however control of their growth remains a challenge. De Luca et al., demonstrate in-situ optical second harmonic generation to monitor and tailor the polarisation and growth of multilayer barium titanate and bismuth ferrite films.
登录
查看更多内容
影响因子：
64.8
作者：
Lee, HN;Christen, HM;Lowndes, DH
通讯作者：
Lowndes, DH
影响因子：
56.9
作者：
Fong, DD;Stephenson, GB;Thompson, C
通讯作者：
Thompson, C
影响因子：
8.6
作者：
Highland, M. J.;Fister, T. T.;Stephenson, G. B.
通讯作者：
Stephenson, G. B.
DOI：
10.1364/josab.27.000888
发表时间：
2010-05-01
影响因子：
1.9
作者：
Kaneshiro, Junichi;Uesu, Yoshiaki;Fukui, Tatsuo
通讯作者：
Fukui, Tatsuo
影响因子：
3.7
作者：
Rubano, A.;Fiebig, M.;Mannhart, J.
通讯作者：
Mannhart, J.