Colossal Room-Temperature Ferroelectric Polarizations in SrTiO3/SrRuO3 Superlattices Induced by Oxygen Vacancies

doi:10.1021/acs.nanolett.2c02175

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	Colossal Room-Temperature Ferroelectric Polarizations in SrTiO3/SrRuO3 Superlattices Induced by Oxygen Vacancies
	Lin, Jun Liang 8,9; Sun, Yuanwei 6,7; He, Ri 5; Li, Yanxi 4; Zhong, Zhicheng 3,5; Gao, Peng 2,6,7; Zhao, Xiang 9; Zhang, Zhidong 8; Wang, Zhan Jie 1
刊名	NANO LETTERS
	2022-08-19
页码	8
关键词	superlattices SrTiO3/SrRuO3 interface pulsed laser deposition oxygen vacancy ferroelectric polarization
ISSN号	1530-6984
DOI	10.1021/acs.nanolett.2c02175
通讯作者	Zhong, Zhicheng(zhong@nimte.ac.cn) ; Gao, Peng(p-gao@pku.edu.cn) ; Wang, Zhan Jie(wangzj@imr.ac.cn)
英文摘要	Artificial superlattices have demonstrated many unique phenomena not found in bulk materials. For this investigation, SrTiO3/SrRuO3 paraelectric/metallic superlattices with various stacking periods were synthesized via pulsed laser deposition. A robust room-temperature ferroelectric polarization (similar to 46 mu C/cm(2)) was found in the superlattices with 2 unit cell (u.c.) thick SrRuO3 layers, despite the fact that neither SrTiO3 nor SrRuO3 is inherently ferroelectric. Results obtained from atomically resolved elemental mapping and X-ray photoelectron spectroscopy verified that oxygen vacancies accumulated at the SrTiO3/SrRuO3 interfaces, causing lattice distortions and increased tetragonality (c/a). The observed ferroelectric responses can be mainly attributed to the broken spatial inversion symmetry induced by the ordered distribution of oxygen vacancies at the SrTiO3/SrRuO3 interfaces, coupled with the triggering of external electric field. The resulting polarization mechanism induced by oxygen vacancies suggests viable ways for improving the electrical properties of ferroelectric materials, with the goal of expanding the functionality of a range of electronic devices.
资助项目	basic scientific research projects of colleges and universities of Liaoning Province of China[LZGD2017005] ; National Basic Research Program of China[2017YFA0206302] ; National Natural Science Foundation of China[52125307] ; scientific research fund project of the Educational Department of Liaoning Province of China[LJKZ0100]
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000846292900001
资助机构	basic scientific research projects of colleges and universities of Liaoning Province of China ; National Basic Research Program of China ; National Natural Science Foundation of China ; scientific research fund project of the Educational Department of Liaoning Province of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/175055]
专题	金属研究所_中国科学院金属研究所
通讯作者	Zhong, Zhicheng; Gao, Peng; Wang, Zhan Jie
作者单位	1.Shenyang Univ Technol, Sch Mat Sci & Engn, Shenyang 110870, Peoples R China 2.Collaborat Innovat Ctr Quantum Matter, Beijing 100871, Peoples R China 3.Univ Chinese Acad Sci, China Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China 4.Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA 5.Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Key Lab Magnet Mat & Devices, Zhejiang Prov Key Lab Magnet Mat & Applicat Techno, Ningbo 315201, Peoples R China 6.Peking Univ, Sch Phys, Electron Microscopy Lab, Beijing 100871, Peoples R China 7.Peking Univ, Int Ctr Quantum Mat, Sch Phys, Beijing 100871, Peoples R China 8.Chinese Acad Sci, Inst Met Res IMR, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 9.Northeastern Univ, Sch Mat Sci & Engn, Shenyang 110819, Peoples R China
推荐引用方式 GB/T 7714	Lin, Jun Liang,Sun, Yuanwei,He, Ri,et al. Colossal Room-Temperature Ferroelectric Polarizations in SrTiO3/SrRuO3 Superlattices Induced by Oxygen Vacancies[J]. NANO LETTERS,2022:8.
APA	Lin, Jun Liang.,Sun, Yuanwei.,He, Ri.,Li, Yanxi.,Zhong, Zhicheng.,...&Wang, Zhan Jie.(2022).Colossal Room-Temperature Ferroelectric Polarizations in SrTiO3/SrRuO3 Superlattices Induced by Oxygen Vacancies.NANO LETTERS,8.
MLA	Lin, Jun Liang,et al."Colossal Room-Temperature Ferroelectric Polarizations in SrTiO3/SrRuO3 Superlattices Induced by Oxygen Vacancies".NANO LETTERS (2022):8.