Local Enhancement of Polarization at PbTiO3/BiFeO3 Interfaces Mediated by Charge Transfer

doi:10.1021/acs.nanolett.7b00788

	Local Enhancement of Polarization at PbTiO3/BiFeO3 Interfaces Mediated by Charge Transfer
	Liu, Ying 1; Zhu, Yin-Lian 1; Tang, Yun-Long 1; Wang, Yu-Jia 1; Jiang, Yi-Xiao 1; Xu, Yao-Bin 1; Zhang, Bin 2; Ma, Xiu-Liang1,3
	2017-06
发表期刊	NANO LETTERS
ISSN	1530-6984
卷号	17 期号:6 页码:3619-3628
摘要	Ferroelectrics hold promise for sensors, transducers, and telecommunications. With the demand of electronic devices scaling down, they take the form of nanoscale films. However, the polarizations in ultrathin ferroelectric films are usually reduced dramatically due to the depolarization field caused by incomplete charge screening at interfaces, hampering the integrations of ferroelectrics into electric devices. Here, we design and fabricate a ferroelectric/multiferroic PbTiO3/BiFeO3 system, which exhibits discontinuities in both chemical valence and ferroelectric polarization across the interface. Aberration-corrected scanning transmission electron microscopic study reveals an 8% elongation of out-of-plane lattice spacing associated with 104%, 107%, and 39% increments of delta(Ti), delta(O1), and delta(O2) in the PbTiO3 layer near the head-to-tail polarized interface, suggesting an over similar to 70% enhancement of polarization compared with that of bulk PbTiO3. Besides that in PbTiO3, polarization in the BiFeO3 is also remarkably enhanced. Electron energy loss spectrum and X-ray photoelectron spectroscopy investigations demonstrate the oxygen vacancy accumulation as well as the transfer of Fe3+ to Fe2+ at the interface. On the basis of the polar catastrophe model, FeO2/PbO interface is determined. First-principles calculation manifests that the oxygen vacancy at the interface plays a predominate role in inducing the local polarization enhancement. We propose a charge transfer mechanism that leads to the remarkable polarization increment at the PbTiO3/BiFeO3 interface. This study may facilitate the development of nanoscale ferroelectric devices by tailing the coupling of charge and lattice in oxide heteroepitaxy.
关键词	Perovskite oxide ferroelectric interface polarization enhancement aberration corrected scanning transmission electron microscope
DOI	10.1021/acs.nanolett.7b00788
收录类别	SCI ; SCIE
语种	英语
资助项目	Key Research Program of Frontier Sciences CAS[QYZDJ-SSW-JSC010]
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS类目	Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS记录号	WOS:000403631600044
出版者	AMER CHEMICAL SOC
EI入藏号	20172503793097
EI主题词	Polarization
EI分类号	482.2 Minerals - 525.4 Energy Losses (industrial and residential) - 531.2 Metallography - 602.2 Mechanical Transmissions - 701.1 Electricity: Basic Concepts and Phenomena - 708.1 Dielectric Materials - 761 Nanotechnology - 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 921 Mathematics - 933.1 Crystalline Solids - 951 Materials Science
引用统计	被引频次：50[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/33256
专题	材料科学与工程学院材料科学与工程学院_特聘教授组
通讯作者	Zhu, Yin-Lian; Ma, Xiu-Liang
作者单位	1.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Wenhua Rd 72, Shenyang 110016, Peoples R China; 2.Chinese Acad Sci, Inst Met Res, Anal & Testing Dept, Wenhua Rd 72, Shenyang 110016, Peoples R China; 3.Lanzhou Univ Technol, Sch Mat Sci & Engn, Langongping Rd 287, Lanzhou 730050, Peoples R China
通讯作者单位	材料科学与工程学院
推荐引用方式 GB/T 7714	Liu, Ying,Zhu, Yin-Lian,Tang, Yun-Long,et al. Local Enhancement of Polarization at PbTiO3/BiFeO3 Interfaces Mediated by Charge Transfer[J]. NANO LETTERS,2017,17(6):3619-3628.
APA	Liu, Ying.,Zhu, Yin-Lian.,Tang, Yun-Long.,Wang, Yu-Jia.,Jiang, Yi-Xiao.,...&Ma, Xiu-Liang.(2017).Local Enhancement of Polarization at PbTiO3/BiFeO3 Interfaces Mediated by Charge Transfer.NANO LETTERS,17(6),3619-3628.
MLA	Liu, Ying,et al."Local Enhancement of Polarization at PbTiO3/BiFeO3 Interfaces Mediated by Charge Transfer".NANO LETTERS 17.6(2017):3619-3628.

条目包含的文件		下载所有文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
Liu-2017-Local Enhan（6510KB）	期刊论文	出版稿	开放获取	CC BY-NC-SA	浏览下载