Observation of Interfacial Antiferromagnetic Coupling between Magnetic Topological Insulator and Antiferromagnetic Insulator

doi:10.1021/acs.nanolett.9b00027

IMR OpenIR

	Observation of Interfacial Antiferromagnetic Coupling between Magnetic Topological Insulator and Antiferromagnetic Insulator
	Wang, Fei 1,2; Xiao, Di 1; Yuan, Wei 3,4; Jiang, Jue 1; Zhao, Yi-Fan 1; Zhang, Ling 1; Yao, Yunyan 3; Liu, Wei 2; Zhang, Zhidong 2; Liu, Chaoxing 1; Shi, Jing 4; Han, Wei 3,5; Chan, Moses H. W.1; Samarth, Nitin 1; Chang, Cui-Zu 1
通讯作者	Chang, Cui-Zu(cxc955@psu.edu)
	2019-05-01
发表期刊	NANO LETTERS
ISSN	1530-6984
卷号	19 期号:5 页码:2945-2952
摘要	Inducing magnetic orders in a topological insulator (TI) to break its time reversal symmetry has been predicted to reveal many exotic topological quantum phenomena. The manipulation of magnetic orders in a TI layer can play a key role in harnessing these quantum phenomena toward technological applications. Here we fabricated a thin magnetic TI film on an antiferromagnetic (AFM) insulator Cr2O3 layer and found that the magnetic moments of the magnetic TI layer and the surface spins of the Cr2O3 layers favor interfacial AFM coupling. Field cooling studies show a crossover from negative to positive exchange bias clarifying the competition between the interfacial AFM coupling energy and the Zeeman energy in the AFM insulator layer. The interfacial exchange coupling also enhances the Curie temperature of the magnetic TI layer. The unique interfacial AFM alignment in magnetic TI on AFM insulator heterostructures opens a new route toward manipulating the interplay between topological states and magnetic orders in spin-engineered heterostructures, facilitating the exploration of proof-of-concept TI-based spintronic and electronic devices with multifunctionality and low power consumption.
关键词	Topological insulators antiferromagnetic insulators exchange coupling effect antiferromagnetic coupling exchange bias effect
资助者	ARO Young Investigator Program Award ; Alfred P. Sloan Research Fellowship ; Penn State Two-Dimensional Crystal Consortium Materials Innovation Platform (2DCC-MIP) under NSF ; Office of Naval Research ; State Key Program of Research and Development of China ; National Natural Science Foundation of China (NSFC) ; Key Research Program of Chinese Academy of Sciences ; National Basic Research Programs of China ; DOE
DOI	10.1021/acs.nanolett.9b00027
收录类别	SCI
语种	英语
资助项目	ARO Young Investigator Program Award[W911NF1810198] ; Alfred P. Sloan Research Fellowship ; Penn State Two-Dimensional Crystal Consortium Materials Innovation Platform (2DCC-MIP) under NSF[DMR-1539916] ; Office of Naval Research[N00014-15-1-2675] ; Office of Naval Research[N00014-15-1-2370] ; State Key Program of Research and Development of China[2017YFA0206302] ; National Natural Science Foundation of China (NSFC)[11574006] ; National Natural Science Foundation of China (NSFC)[51590883] ; National Natural Science Foundation of China (NSFC)[51331006] ; National Natural Science Foundation of China (NSFC)[51771198] ; Key Research Program of Chinese Academy of Sciences[KJZD-EW-M05-3] ; National Basic Research Programs of China[2015CB921104] ; DOE[DE-SC0019064] ; DOE[DE-FG02-07ER46351]
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:000467781900023
出版者	AMER CHEMICAL SOC
引用统计	被引频次：27[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/321006/133551
专题	中国科学院金属研究所
通讯作者	Chang, Cui-Zu
作者单位	1.Penn State Univ, Dept Phys, University Pk, PA 16802 USA 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 3.Peking Univ, Sch Phys, Int Ctr Quantum Mat, Beijing 100871, Peoples R China 4.Univ Calif Riverside, Dept Phys, Riverside, CA 92521 USA 5.Collaborat Innovat Ctr Quantum Matter, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Wang, Fei,Xiao, Di,Yuan, Wei,et al. Observation of Interfacial Antiferromagnetic Coupling between Magnetic Topological Insulator and Antiferromagnetic Insulator[J]. NANO LETTERS,2019,19(5):2945-2952.
APA	Wang, Fei.,Xiao, Di.,Yuan, Wei.,Jiang, Jue.,Zhao, Yi-Fan.,...&Chang, Cui-Zu.(2019).Observation of Interfacial Antiferromagnetic Coupling between Magnetic Topological Insulator and Antiferromagnetic Insulator.NANO LETTERS,19(5),2945-2952.
MLA	Wang, Fei,et al."Observation of Interfacial Antiferromagnetic Coupling between Magnetic Topological Insulator and Antiferromagnetic Insulator".NANO LETTERS 19.5(2019):2945-2952.