Large Polarization Near 50 μC/cm<SUP>2</SUP> in a Single Unit Cell Layer SrTiO<sub>3</sub>

doi:10.1021/acs.nanolett.3c04695

IMR OpenIR

	Large Polarization Near 50 μC/cm² in a Single Unit Cell Layer SrTiO₃
	Wang, Jing-Hui 1,2; Zhu, Mei-Xiong 1,2; Li, Yu-Shu 1,2; Chen, Shuang-Jie 1,2; Gong, Feng-Hui 3; Lv, Xiao-Dong 1,2; Jiang, Ru-Jian 1,2; Liu, Su-Zhen 1,2; Li, Changji 1; Wang, Yu-Jia 1; Tang, Yun-Long 1,2; Zhu, Yin-Lian 3,5; Ma, Xiu-Liang 3,4
通讯作者	Tang, Yun-Long(yltang@imr.ac.cn) ; Zhu, Yin-Lian(zhuyinlian@sslab.org.cn)
	2024-03-25
发表期刊	NANO LETTERS
ISSN	1530-6984
卷号	24 期号:14 页码:4082-4090
摘要	The generally nonpolar SrTiO3 has attracted more attention recently because of its possibly induced novel polar states and related paraelectric-ferroelectric phase transitions. By using controlled pulsed laser deposition, high-quality, ultrathin, and strained SrTiO3 layers were obtained. Here, transmission electron microscopy and theoretical simulations have unveiled highly polar states in SrTiO3 films even down to one unit cell at room temperature, which were stabilized in the PbTiO3/SrTiO3/PbTiO3 sandwich structures by in-plane tensile strain and interfacial coupling, as evidenced by large tetragonality (similar to 1.05), notable polar ion displacement (0.019 nm), and thus ultrahigh spontaneous polarization (up to similar to 50 mu C/cm(2)). These values are nearly comparable to those of the strong ferroelectrics as the PbZrxTi1-xO3 family. Our findings provide an effective and practical approach for integrating large strain states into oxide films and inducing polarization in nonpolar materials, which may broaden the functionality of nonpolar oxides and pave the way for the discovery of new electronic materials.
关键词	polar SrTiO3 room-temperature polarization strain engineering interfacial coupling atomicscale
资助者	National Natural Science Foundation of China ; Shenyang National Laboratory for Materials Science ; Youth Innovation Promotion Association, CAS ; Scientific Instrument Developing Project of CAS ; National Natural Science Foundation of China
DOI	10.1021/acs.nanolett.3c04695
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[L2022R04] ; National Natural Science Foundation of China[L2021F06] ; Shenyang National Laboratory for Materials Science[2021187] ; Youth Innovation Promotion Association, CAS[YJKYYQ20200066] ; Scientific Instrument Developing Project of CAS[52122101] ; Scientific Instrument Developing Project of CAS[51971223] ; National Natural Science Foundation of China
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:001190694800001
出版者	AMER CHEMICAL SOC
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/185278
专题	中国科学院金属研究所
通讯作者	Tang, Yun-Long; Zhu, Yin-Lian
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Bay Area Ctr Elect Microscopy, Songshan Lake Mat Lab, Dongguan 523808, Peoples R China 4.Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China 5.Hunan Univ Sci & Technol, Sch Mat Sci & Engn, Xiangtan 411201, Peoples R China
推荐引用方式 GB/T 7714	Wang, Jing-Hui,Zhu, Mei-Xiong,Li, Yu-Shu,et al. Large Polarization Near 50 μC/cm² in a Single Unit Cell Layer SrTiO₃[J]. NANO LETTERS,2024,24(14):4082-4090.
APA	Wang, Jing-Hui.,Zhu, Mei-Xiong.,Li, Yu-Shu.,Chen, Shuang-Jie.,Gong, Feng-Hui.,...&Ma, Xiu-Liang.(2024).Large Polarization Near 50 μC/cm² in a Single Unit Cell Layer SrTiO₃.NANO LETTERS,24(14),4082-4090.
MLA	Wang, Jing-Hui,et al."Large Polarization Near 50 μC/cm² in a Single Unit Cell Layer SrTiO₃".NANO LETTERS 24.14(2024):4082-4090.