High-Mobility Spin-Polarized Two-Dimensional Electron Gases at EuO/KTaO3 Interfaces

doi:10.1103/PhysRevLett.121.116803

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	High-Mobility Spin-Polarized Two-Dimensional Electron Gases at EuO/KTaO3 Interfaces
	Zhang, Hongrui 1,2; Yun, Yu 3,4; Zhang, Xuejing 1,2; Zhang, Hui 1,2; Ma, Yang 3,4; Yan, Xi 1,2; Wang, Fei 2,5; Li, Gang 1,2; Li, Rui 1,2; Khan, Tahira 1,2
刊名	PHYSICAL REVIEW LETTERS
	2018-09-12
卷号	121 期号:11 页码:6
ISSN号	0031-9007
DOI	10.1103/PhysRevLett.121.116803
通讯作者	Han, Wei(weihan@pku.edu.cn) ; Sun, Jirong(jrsun@iphy.ac.cn)
英文摘要	Two-dimensional electron gases (2DEGs) at oxide interfaces, which provide unique playgrounds for emergent phenomena, have attracted increasing attention in recent years. While most of the previous works focused on the 2DEGs at LaAlO3/SrTiO3 interfaces, here we report on a new kind of 2DEGs formed between a magnetic insulator EuO and a high-k perovskite KTaO3. The 2DEGs are not only highly conducting, with a maximal Hall mobility of 111.6 cm(2)/Vs at 2 K, but also well spin polarized, showing strongly hysteretic magnetoresistance up to 25 K and well-defined anomalous Hall effect up to 70 K. Moreover, unambiguous correspondences between the hysteretic behaviors of 2DEGs and the EuO layer are captured, suggesting the proximity effect of the latter on the former. This is confirmed by the results of density-functional theory calculations: Through interlayer exchange, EuO drives the neighboring TaO2 layer into a ferromagnetic state. The present work opens new avenues for the exploration for high performance spin-polarized 2DEGs at oxide interfaces.
资助项目	National Basic Research of China[2016YFA0300701] ; National Basic Research of China[2015CB921104] ; National Basic Research of China[2017YFA0206300] ; National Basic Research of China[2014CB920902] ; National Natural Science Foundation of China[11520101002] ; National Natural Science Foundation of China[11574006] ; National Natural Science Foundation of China[51590880] ; National Natural Science Foundation of China[51531008] ; National Natural Science Foundation of China[11704011] ; Key Program of the Chinese Academy of Sciences
WOS研究方向	Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000444588900012
资助机构	National Basic Research of China ; National Natural Science Foundation of China ; Key Program of the Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/129435]
专题	金属研究所_中国科学院金属研究所
通讯作者	Han, Wei; Sun, Jirong
作者单位	1.Chinese Acad Sci, Beijing Natl Lab Condensed Matter & Inst Phys, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Peking Univ, Sch Phys, Int Ctr Quantum Mat, Beijing 100871, Peoples R China 4.Collaborat Innovat Ctr Quantum Matter, Beijing 100871, Peoples R China 5.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Hongrui,Yun, Yu,Zhang, Xuejing,et al. High-Mobility Spin-Polarized Two-Dimensional Electron Gases at EuO/KTaO3 Interfaces[J]. PHYSICAL REVIEW LETTERS,2018,121(11):6.
APA	Zhang, Hongrui.,Yun, Yu.,Zhang, Xuejing.,Zhang, Hui.,Ma, Yang.,...&Sun, Jirong.(2018).High-Mobility Spin-Polarized Two-Dimensional Electron Gases at EuO/KTaO3 Interfaces.PHYSICAL REVIEW LETTERS,121(11),6.
MLA	Zhang, Hongrui,et al."High-Mobility Spin-Polarized Two-Dimensional Electron Gases at EuO/KTaO3 Interfaces".PHYSICAL REVIEW LETTERS 121.11(2018):6.