Magnetic two-dimensional electron gases with high Curie temperatures at LaAlO3/SrTiO3:Fe interfaces

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	Magnetic two-dimensional electron gases with high Curie temperatures at LaAlO3/SrTiO3:Fe interfaces
	Zhang, HR; Yan, X; Zhang, H; Wang, F; Gu, YD; Ning, XK; Khan, T; Li, R; Chen, YS; Liu, W; Wang, SF; Shen, BG; Sun, JR; Sun, JR (reprint author), Chinese Acad Sci, Beijing Natl Lab Condensed Matter, Beijing 100190, Peoples R China.; Sun, JR (reprint author), Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China.; Sun, JR (reprint author), Univ Chinese Acad Sci, Beijing 100049, Peoples R China.; Wang, SF (reprint author), Hebei Univ, Coll Phys Sci & Technol, Hebei Key Lab Opt Elect Informat & Mat, Baoding 071002, Peoples R China.
	2018-04-23
发表期刊	PHYSICAL REVIEW B
ISSN	2469-9950
卷号	97 期号:15 页码:-
摘要	Spin-polarized two-dimensional electron gas (2DEG) at the interface of two insulating perovskite oxides has been a focus of intensive studies in recent years. So far all attempts to construct magnetic 2DEG are based on the selection of an appropriate buffer layer or cap layer in SrTiO3-based heterostructures, and the magnetic effect thus produced on 2DEG is indirect and weak. Here, we fabricated the 2DEG based on Fe-doped SrTiO3 that is superparamagnetic rather than diamagnetic like SrTiO3. In addition to good metallicity, considerable Kondo effect, and negative magnetoresistance, the most striking observation of the present work is the occurrence of the anomalous Hall effect up to room temperature. This is transport evidence for the existence of spin-polarized 2DEG at high temperatures. As suggested by the monotonic increase of Curie temperature with carrier density, the magnetic exchange between magnetic ions could be mediated by the itinerant electrons of the 2DEG. The present work opens an avenue for the exploration of spin-polarized 2DEG.; Spin-polarized two-dimensional electron gas (2DEG) at the interface of two insulating perovskite oxides has been a focus of intensive studies in recent years. So far all attempts to construct magnetic 2DEG are based on the selection of an appropriate buffer layer or cap layer in SrTiO3-based heterostructures, and the magnetic effect thus produced on 2DEG is indirect and weak. Here, we fabricated the 2DEG based on Fe-doped SrTiO3 that is superparamagnetic rather than diamagnetic like SrTiO3. In addition to good metallicity, considerable Kondo effect, and negative magnetoresistance, the most striking observation of the present work is the occurrence of the anomalous Hall effect up to room temperature. This is transport evidence for the existence of spin-polarized 2DEG at high temperatures. As suggested by the monotonic increase of Curie temperature with carrier density, the magnetic exchange between magnetic ions could be mediated by the itinerant electrons of the 2DEG. The present work opens an avenue for the exploration of spin-polarized 2DEG.
部门归属	[zhang, hongrui ; yan, xi ; zhang, hui ; khan, tahira ; li, rui ; chen, yuansha ; shen, baogen ; sun, jirong] chinese acad sci, beijing natl lab condensed matter, beijing 100190, peoples r china ; [zhang, hongrui ; yan, xi ; zhang, hui ; khan, tahira ; li, rui ; chen, yuansha ; shen, baogen ; sun, jirong] chinese acad sci, inst phys, beijing 100190, peoples r china ; [zhang, hongrui ; yan, xi ; zhang, hui ; wang, fei ; gu, youdi ; khan, tahira ; li, rui ; chen, yuansha ; liu, wei ; shen, baogen ; sun, jirong] univ chinese acad sci, beijing 100049, peoples r china ; [wang, fei ; gu, youdi ; liu, wei] chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, liaoning, peoples r china ; [ning, xingkun ; wang, shufang] hebei univ, coll phys sci & technol, hebei key lab opt elect informat & mat, baoding 071002, peoples r china
关键词	Zno Nanowires Magnetoresistance Ferromagnetism
学科领域	Physics, Condensed Matter
资助者	National Basic Research of China [2016YFA0300701, 2017YFA030360]; National Natural Science Foundation of China [11520101002, 51590880, 11374348, 11674378]; Chinese Academy of Sciences
收录类别	SCI
语种	英语
WOS记录号	WOS:000430545100004
引用统计	被引频次：21[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/321006/79357
专题	中国科学院金属研究所
通讯作者	Sun, JR (reprint author), Chinese Acad Sci, Beijing Natl Lab Condensed Matter, Beijing 100190, Peoples R China.; Sun, JR (reprint author), Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China.; Sun, JR (reprint author), Univ Chinese Acad Sci, Beijing 100049, Peoples R China.; Wang, SF (reprint author), Hebei Univ, Coll Phys Sci & Technol, Hebei Key Lab Opt Elect Informat & Mat, Baoding 071002, Peoples R China.
推荐引用方式 GB/T 7714	Zhang, HR,Yan, X,Zhang, H,et al. Magnetic two-dimensional electron gases with high Curie temperatures at LaAlO3/SrTiO3:Fe interfaces[J]. PHYSICAL REVIEW B,2018,97(15):-.
APA	Zhang, HR.,Yan, X.,Zhang, H.,Wang, F.,Gu, YD.,...&Wang, SF .(2018).Magnetic two-dimensional electron gases with high Curie temperatures at LaAlO3/SrTiO3:Fe interfaces.PHYSICAL REVIEW B,97(15),-.
MLA	Zhang, HR,et al."Magnetic two-dimensional electron gases with high Curie temperatures at LaAlO3/SrTiO3:Fe interfaces".PHYSICAL REVIEW B 97.15(2018):-.