Novel pi/2-Periodic Planar Hall Effect Due to Orbital Magnetic Moments in MnBi2Te4

doi:10.1021/acs.nanolett.1c03232

	Novel pi/2-Periodic Planar Hall Effect Due to Orbital Magnetic Moments in MnBi2Te4
	Wu, Min 1; Tu, Daifeng 1,2; Nie, Yong 1,2; Miao, Shaopeng 1,2; Gao, Wenshuai 3; Han, Yuyan 1; Zhu, Xiangde 1; Zhou, Jianhui 1; Ning, Wei 1; Tian, Mingliang 1,3
刊名	NANO LETTERS
	2021-12-28
关键词	Antiferromagnetic topological insulator planar Hall effect Berry curvature orbital magnetic moment
ISSN号	1530-6984
DOI	10.1021/acs.nanolett.1c03232
通讯作者	Zhou, Jianhui(jhzhou@hmfl.ac.cn) ; Ning, Wei(ningwei@hmfl.ac.cn)
英文摘要	The Berry curvature and orbital magnetic moment (OMM) come from either inversion symmetry or time-reversal symmetry breaking in quantum materials. Here, we demonstrate the significance of OMMs and Berry curvature in planar Hall effect (PHE) in antiferromagnetic topological insulator MnBi2Te4 flakes. We observe a PHE with period of pi and positive magnitude at low fields, resembling the PHE of the surface states in nonmagnetic topological insulators. Remarkably, a novel predominant PHE with period of pi/2 and negative magnitude emerges below the Neel temperature with B > 10 T. Our theoretical calculations reveal that this unusual pi/2-periodic PHE originates from the topological OMMs of bulk Dirac electrons. Moreover, the competition between the contributions from the bulk and the surface states leads to nontrivial evolutions of PHE and anisotropic magnetoresistance. Our results reveal intriguing electromagnetic response due to the OMMs and also provide insight into the potential applications of magnetic topological insulators in spintronics.
资助项目	National Key Research and Development Program of China[2017YFA0403502] ; Natural Science Foundation of China[U19A2093] ; Natural Science Foundation of China[U2032164] ; Natural Science Foundation of China[11774353] ; Natural Science Foundation of China[U1732274] ; Natural Science Foundation of China[11804340] ; Natural Science Foundation of China[U2032163] ; Natural Science Foundation of China[U2032214] ; Collaborative Innovation Program of Hefei Science Center, CAS[2019HSC-CIP 001] ; Collaborative Innovation Program of Hefei Science Center, CAS[2020HSC-CIP 014] ; Youth Innovation Promotion Association of CAS[2017483] ; Users with Excellence Program of Hefei Center CAS[2020HSC-UE015] ; Users with Excellence Program of Hefei Center CAS[2021HSC-UE008] ; High Magnetic Field Laboratory of Anhui Province
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:000737968900001
资助机构	National Key Research and Development Program of China ; Natural Science Foundation of China ; Collaborative Innovation Program of Hefei Science Center, CAS ; Youth Innovation Promotion Association of CAS ; Users with Excellence Program of Hefei Center CAS ; High Magnetic Field Laboratory of Anhui Province
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/127213]
专题	中国科学院合肥物质科学研究院
通讯作者	Zhou, Jianhui; Ning, Wei
作者单位	1.Chinese Acad Sci, Anhui Key Lab Condensed Matter Phys Extreme Condi, High Magnet Field Lab, HFIPS, Hefei 230031, Anhui, Peoples R China 2.Univ Sci & Technol China, Dept Phys, Hefei 230026, Peoples R China 3.Anhui Univ, Sch Phys & Mat Sci, Dept Phys, Hefei 230601, Peoples R China
推荐引用方式 GB/T 7714	Wu, Min,Tu, Daifeng,Nie, Yong,et al. Novel pi/2-Periodic Planar Hall Effect Due to Orbital Magnetic Moments in MnBi2Te4[J]. NANO LETTERS,2021.
APA	Wu, Min.,Tu, Daifeng.,Nie, Yong.,Miao, Shaopeng.,Gao, Wenshuai.,...&Tian, Mingliang.(2021).Novel pi/2-Periodic Planar Hall Effect Due to Orbital Magnetic Moments in MnBi2Te4.NANO LETTERS.
MLA	Wu, Min,et al."Novel pi/2-Periodic Planar Hall Effect Due to Orbital Magnetic Moments in MnBi2Te4".NANO LETTERS (2021).