Metal-ferroelectric supercrystals with periodically curved metallic layers
Metal-ferroelectric supercrystals with periodically curved metallic layers
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DOI：
10.1038/s41563-020-00864-6
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发表时间：
2021-01-04
期刊：
影响因子：
41.2
通讯作者：
Zubko, Pavlo
中科院分区：
文献类型：
--
作者：
Hadjimichael, Marios;Li, Yaqi;Zubko, Pavlo
同时操纵纳米异质结构中的多个边界条件提供了一个通用的路线，以稳定不寻常的结构和紧急阶段。在这里，我们表明，一个稳定的超晶相，包括一个三维有序的纳米级域定制的周期性可以在PbTiO 3-SrRuO 3铁电金属超晶格工程。实验室和同步辐射X射线衍射，piezoresponse力显微镜，扫描透射电子显微镜和相场模拟的组合揭示了一个复杂的分层域结构，形成最小化的弹性和静电能量。大的局部变形的铁电晶格容纳的周期性晶格调制的金属SrRuO 3层的曲率高达10（7）m（-1）。我们的研究结果表明，多畴铁电系统可以被利用作为通用模板，以诱导相关材料的大曲率，并提出了一种途径，工程相关材料与调制的结构和电子性能，可以使用电场控制。
Simultaneous manipulation of multiple boundary conditions in nanoscale heterostructures offers a versatile route to stabilizing unusual structures and emergent phases. Here, we show that a stable supercrystal phase comprising a three-dimensional ordering of nanoscale domains with tailored periodicities can be engineered in PbTiO3-SrRuO3 ferroelectric-metal superlattices. A combination of laboratory and synchrotron X-ray diffraction, piezoresponse force microscopy, scanning transmission electron microscopy and phase-field simulations reveals a complex hierarchical domain structure that forms to minimize the elastic and electrostatic energy. Large local deformations of the ferroelectric lattice are accommodated by periodic lattice modulations of the metallic SrRuO3 layers with curvatures up to 10(7) m(-1). Our results show that multidomain ferroelectric systems can be exploited as versatile templates to induce large curvatures in correlated materials, and present a route for engineering correlated materials with modulated structural and electronic properties that can be controlled using electric fields.