Giant room temperature anomalous Hall effect and tunable topology in a ferromagnetic topological semimetal Co2MnAl

doi:10.1038/s41467-020-17174-9

IMR OpenIR

	Giant room temperature anomalous Hall effect and tunable topology in a ferromagnetic topological semimetal Co2MnAl
	Li, Peigang 1; Koo, Jahyun 2; Ning, Wei 3; Li, Jinguo 4; Miao, Leixin 5; Min, Lujin 3,5; Zhu, Yanglin 1,3; Wang, Yu 1,3; Alem, Nasim 5; Liu, Chao-Xing 3; Mao, Zhiqiang 1,3; Yan, Binghai 2
通讯作者	Ning, Wei(wvn5038@psu.edu) ; Mao, Zhiqiang(zim1@psu.edu) ; Yan, Binghai(binghai.yan@weizmann.ac.il)
	2020-07-10
发表期刊	NATURE COMMUNICATIONS
ISSN	2041-1723
卷号	11 期号:1 页码:8
摘要	Weyl semimetals exhibit unusual surface states and anomalous transport phenomena. It is hard to manipulate the band structure topology of specific Weyl materials. Topological transport phenomena usually appear at very low temperatures, which sets challenges for applications. In this work, we demonstrate the band topology modification via a weak magnetic field in a ferromagnetic Weyl semimetal candidate, Co2MnAl, at room temperature. We observe a tunable, giant anomalous Hall effect (AHE) induced by the transition involving Weyl points and nodal rings. The AHE conductivity is as large as that of a 3D quantum AHE, with the Hall angle (Theta (H)) reaching a record value (tan Theta H=0.21) at the room temperature among magnetic conductors. Furthermore, we propose a material recipe to generate large AHE by gaping nodal rings without requiring Weyl points. Our work reveals an intrinsically magnetic platform to explore the interplay between magnetic dynamics and topological physics for developing spintronic devices. Band topology of Weyl semimetals is usually predetermined by material parameters and can hardly be manipulated, and their transport properties appear at low temperature. Here, the authors modify the topology via a weak magnetic field and observe a giant anomalous Hall effect at room temperature.
资助者	US National Science Foundation ; Penn State Center for Nanoscale Science, an NSF MRSEC ; Willner Family Leadership Institute for the Weizmann Institute of Science ; Benoziyo Endowment Fund for the Advancement of Science ; Ruth and Herman Albert Scholars Program for New Scientists ; European Research Council (ERC) ; Office of Naval Research ; US Department of Energy ; Kaufman New Initiative research grant of the Pittsburgh Foundation ; National Science Foundation through the Penn State 2D Crystal Consortium-Materials Innovation Platform (2DCC-MIP) under NSF
DOI	10.1038/s41467-020-17174-9
收录类别	SCI
语种	英语
资助项目	US National Science Foundation[DMR1917579] ; Penn State Center for Nanoscale Science, an NSF MRSEC[DMR-1420620] ; Willner Family Leadership Institute for the Weizmann Institute of Science ; Benoziyo Endowment Fund for the Advancement of Science ; Ruth and Herman Albert Scholars Program for New Scientists ; European Research Council (ERC)[815869] ; Office of Naval Research[N00014-18-1-2793] ; US Department of Energy[DESC0019064] ; Kaufman New Initiative research grant of the Pittsburgh Foundation[KA2018-98553] ; National Science Foundation through the Penn State 2D Crystal Consortium-Materials Innovation Platform (2DCC-MIP) under NSF[DMR-1539916]
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000548310100001
出版者	NATURE PUBLISHING GROUP
引用统计	被引频次：109[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/321006/139831
专题	中国科学院金属研究所
通讯作者	Ning, Wei; Mao, Zhiqiang; Yan, Binghai
作者单位	1.Tulane Univ, Dept Phys & Engn Phys, New Orleans, LA 70118 USA 2.Weizmann Inst Sci, Dept Condensed Matter Phys, IL-7610001 Rehovot, Israel 3.Penn State Univ, Dept Phys, State Coll, PA 16802 USA 4.Chinese Acad Sci, Inst Met Reseach, Superalloys Div, Shenyang 110016, Peoples R China 5.Penn State Univ, Dept Mat Sci & Engn, State Coll, PA 16802 USA
推荐引用方式 GB/T 7714	Li, Peigang,Koo, Jahyun,Ning, Wei,et al. Giant room temperature anomalous Hall effect and tunable topology in a ferromagnetic topological semimetal Co2MnAl[J]. NATURE COMMUNICATIONS,2020,11(1):8.
APA	Li, Peigang.,Koo, Jahyun.,Ning, Wei.,Li, Jinguo.,Miao, Leixin.,...&Yan, Binghai.(2020).Giant room temperature anomalous Hall effect and tunable topology in a ferromagnetic topological semimetal Co2MnAl.NATURE COMMUNICATIONS,11(1),8.
MLA	Li, Peigang,et al."Giant room temperature anomalous Hall effect and tunable topology in a ferromagnetic topological semimetal Co2MnAl".NATURE COMMUNICATIONS 11.1(2020):8.