Periodic Polarization Waves in a Strained, Highly Polar Ultrathin SrTiO3

doi:10.1021/acs.nanolett.1c02117

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	Periodic Polarization Waves in a Strained, Highly Polar Ultrathin SrTiO3
	Tang, Yunlong 3; Zhu, Yinlian 3,4; Wu, Bo 4; Wang, Yujia 3; Yang, Lixin 3; Feng, Yanpeng 1,4; Zou, Minjie 1,4; Geng, Wanrong 1,4; Ma, Xiuliang 2,3
刊名	NANO LETTERS
	2021-07-28
卷号	21 期号:14 页码:6274-6281
关键词	Polar SrTiO3 large tetragonality periodically strain engineering atomic scale
ISSN号	1530-6984
DOI	10.1021/acs.nanolett.1c02117
英文摘要	SrTiO3 is generally paraelectric with centrosymmetric structure exhibiting unique quantum fluctuation related ferroelectricity. Here we reveal highly polar and periodic polarization waves in SrTiO3 at room temperature, which is stabilized by periodic tensile strains in a sandwiched PbTiO3/SrTiO3/PbTiO3 structure. Scanning transmission electron microscopy reveals that periodic a/c domain structures in PbTiO3 layers exert unique periodic tensile strains in the ultrathin SrTiO3 layer and consequently make the highly polar and periodic states of SrTiO3. The as-received polar SrTiO3 layer features peak polar ion displacement of similar to 0.01 nm and peak tetragonality of similar to 1.07. These peak values are larger than previous results, which are comparable to that of bulk ferroelectric PbTiO3. Our results suggest that it is possible to integrate large and periodic strain state in oxide films with exotic properties, which in turn could be useful in optical applications and information addressing when used as memory unit.
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:000679930400048
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/148519]
专题	材料科学与工程学院_特聘教授组
作者单位	1.Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China; 2.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China; 4.Songshan Lake Mat Lab, Dongguan 523808, Guangdong, Peoples R China;
推荐引用方式 GB/T 7714	Tang, Yunlong,Zhu, Yinlian,Wu, Bo,et al. Periodic Polarization Waves in a Strained, Highly Polar Ultrathin SrTiO3[J]. NANO LETTERS,2021,21(14):6274-6281.
APA	Tang, Yunlong.,Zhu, Yinlian.,Wu, Bo.,Wang, Yujia.,Yang, Lixin.,...&Ma, Xiuliang.(2021).Periodic Polarization Waves in a Strained, Highly Polar Ultrathin SrTiO3.NANO LETTERS,21(14),6274-6281.
MLA	Tang, Yunlong,et al."Periodic Polarization Waves in a Strained, Highly Polar Ultrathin SrTiO3".NANO LETTERS 21.14(2021):6274-6281.