气候变化领域集成服务门户(CCPortal): Engineering of multiferroic BiFeO3 grain boundaries with head-to-head polarization configurations

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DOI	10.1016/j.scib.2020.12.032
	Engineering of multiferroic BiFeO3 grain boundaries with head-to-head polarization configurations
	Li M.; Yang S.; Shi R.; Li L.; Zhu R.; Li X.; Cheng Y.; Ma X.; Zhang J.; Liu K.; Yu P.; Gao P.
发表日期	2021
ISSN	20959273
起始页码	771
结束页码	776
卷号	66 期号:8
英文摘要	Confined low dimensional charges with high density such as two-dimensional electron gas (2DEG) at interfaces and charged domain walls in ferroelectrics show great potential to serve as functional elements in future nanoelectronics. However, stabilization and control of low dimensional charges is challenging, as they are usually subject to enormous depolarization fields. Here, we demonstrate a method to fabricate tunable charged interfaces with ~77°, 86° and 94° head-to-head polarization configurations in multiferroic BiFeO3 thin films by grain boundary engineering. The adjacent grains are cohesively bonded and the boundary is about 1 nm in width and devoid of any amorphous region. Remarkably, the polarization remains almost unchanged near the grain boundaries, indicating the polarization charges are well compensated, i.e., there should be two-dimensional charge gas confined at grain boundaries. Adjusting the tilt angle of the grain boundaries enables tuning the angle of polarization configurations from 71° to 109°, which in turn allows the control of charge density at the grain boundaries. This general and feasible method opens new doors for the application of charged interfaces in next generation nanoelectronics. © 2020 Science China Press
关键词	Atomic structure BiFeO3 Grain boundaries Head-to-head
英文关键词	Bismuth compounds; Charged particles; Domain walls; Grain boundaries; Iron compounds; Multiferroics; Nanoelectronics; Phase interfaces; Polarization; Angle of polarization; Charged domain wall; Charged interfaces; Depolarization fields; Functional elements; Grain boundary engineering; Polarization charges; Two-dimensional electron gas (2DEG); Two dimensional electron gas
语种	英语
来源期刊	Science Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207467
作者单位	Electron Microscopy Laboratory, School of Physics, Peking University, Beijing, 100871, China; International Center for Quantum Materials, School of Physics, Peking University, Beijing, 100871, China; Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, 100871, China; Peking University Shenzhen Graduate School, Peking University, Peking University, Shenzhen, 518055, China; TCL China Star Optoelectronics Technology Co., Ltd., Shenzhen, 518132, China; Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China; State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University, Beijing, 100871, China; Collaborative Innovation Centre of Quantum Matter, Beijing, 100871, China; State Key Laboratory of Low Dimensional Quantum Physics and Department of Physics, Tsinghua University, Beijing, 100084, China
推荐引用方式 GB/T 7714	Li M.,Yang S.,Shi R.,et al. Engineering of multiferroic BiFeO3 grain boundaries with head-to-head polarization configurations[J],2021,66(8).
APA	Li M..,Yang S..,Shi R..,Li L..,Zhu R..,...&Gao P..(2021).Engineering of multiferroic BiFeO3 grain boundaries with head-to-head polarization configurations.Science Bulletin,66(8).
MLA	Li M.,et al."Engineering of multiferroic BiFeO3 grain boundaries with head-to-head polarization configurations".Science Bulletin 66.8(2021).