globalchange  > 气候变化与战略
DOI: 10.1016/j.scib.2020.12.032
论文题名:
Engineering of multiferroic BiFeO3 grain boundaries with head-to-head polarization configurations
作者: Li M.; Yang S.; Shi R.; Li L.; Zhu R.; Li X.; Cheng Y.; Ma X.; Zhang J.; Liu K.; Yu P.; Gao P.
刊名: Science Bulletin
ISSN: 20959273
出版年: 2021
卷: 66, 期:8
起始页码: 771
结束页码: 776
语种: 英语
中文关键词: 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
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
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170311
Appears in Collections:气候变化与战略

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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

Recommended Citation:
Li M.,Yang S.,Shi R.,et al. Engineering of multiferroic BiFeO3 grain boundaries with head-to-head polarization configurations[J]. Science Bulletin,2021-01-01,66(8)
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