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Self-Assembled LuFeO_3/LuFe_2O_4 Heterostructure with Emergent Ferroic Orderings

机译:Self-Assembled LuFeO_3/LuFe_2O_4 Heterostructure with Emergent Ferroic Orderings

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摘要

Achieving self-assembling structures that exhibit emergent properties and functionalities is one of the holy grails in nanotechnology and holds great promise for a wide range of potential applications. Herein, a self-assembled LuFeO_3-(1/3)LuFe_2O_4-LuFeO_3 heterostructure that consists of two model multiferroics, i.e., hexagonal LuFeO_3 and rhombohedral LuFe_2O_4, is reported in single-layer epitaxial LuFeO_3 thin films. Atomic-scale electron microscopy investigations reveal the spontaneous organization of ferroelectric polarization in each building block, which forms a series of polar configurations. Specifically, the charge and lattice of neighboring LuFeO_3 and LuFe_2O_4 blocks are closely coupled with competing degrees of freedom. A combination of the quantitative analysis of atomically resolved images and spectroscopy with theoretical calculations determines how charge-ordering-induced polarization accommodates charge naturality across the interfaces to reduce the system energy and unravels the formation mechanism of this heterostructure. The results point to the possibilities of generation and control of multiferroic self-assembled systems, which may provide a basis for engineering novel materials with emergent properties.

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  • 来源
    《Advanced functional materials》 |2022年第44期|2206050.1-2206050.8|共8页
  • 作者单位

    Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology Beijing Beijing 100083, P. R. China,State Key Laboratory of New Ceramics and Fine Processing Tsinghua University Beijing 100084, P. R. China,Departmen;

    Key Laboratory of Computational Physical Sciences (Ministry of Education) Institute of Computational Physical Sciences State Key Laboratory of Surface Physics and Department of Physics Fudan University Shanghai 200433, P. R. China,Shanghai Qi Zhi Institut;

    Key Laboratory of Material Physics School of Physics and Microelectronics Zhengzhou University Zhengzhou 450052, P. R. ChinaInstitute for Nanoelectronic Devices and Quantum Computing Fudan University Shanghai 200433, P. R. ChinaState Key Laboratory of New Ceramics and Fine Processing Tsinghua University Beijing 100084, P. R. ChinaDepartment of Condensed Matter Physics and Materials Science Brookhaven National Laboratory Upton, NY 11973, USABeijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology Beijing Beijing 100083, P. R. China;

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  • 正文语种 英语
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  • 关键词

    epitaxial films; heterostructures; lutetium ferrites; polarization; self-assembling;

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