Prediction of a magnetic Weyl semimetal without spin-orbit coupling and strong anomalous Hall effect in the Heusler compensated ferrimagnet Ti2MnAl

doi:10.1103/PhysRevB.97.060406

	Prediction of a magnetic Weyl semimetal without spin-orbit coupling and strong anomalous Hall effect in the Heusler compensated ferrimagnet Ti2MnAl
	Shi, Wujun1,2 ; Muechler, Lukas 3; Manna, Kaustuv 1; Zhang, Yang 1,4; Koepernik, Klaus 4,5; Car, Roberto 3; van den Brink, Jeroen 4; Felser, Claudia 1; Sun, Yan 1
	2018-02-21
发表期刊	PHYSICAL REVIEW B
ISSN	2469-9950
卷号	97 期号:6
发表状态	已发表
DOI	10.1103/PhysRevB.97.060406
摘要	We predict a magnetic Weyl semimetal in the inverse Heusler Ti2MnAl, a compensated ferrimagnet with a vanishing net magnetic moment and a Curie temperature of over 650 K. Despite the vanishing net magnetic moment, we calculate a large intrinsic anomalous Hall effect (AHE) of about 300 S/cm. It derives from the Berry curvature distribution of the Weyl points, which are only 14 meV away from the Fermi level and isolated from trivial bands. Different from antiferromagnets Mn3X (X = Ge, Sn, Ga, Ir, Rh, and Pt), where the AHE originates from the noncollinear magnetic structure, the AHE in Ti2MnAl stems directly from the Weyl points and is topologically protected. The large anomalous Hall conductivity (AHC) together with a low charge carrier concentration should give rise to a large anomalous Hall angle. In contrast to the Co-based ferromagnetic Heusler compounds, the Weyl nodes in Ti2MnAl do not derive from nodal lines due to the lack of mirror symmetries in the inverse Heusler structure. Since the magnetic structure breaks spin-rotation symmetry, the Weyl nodes are stable without SOC. Moreover, because of the large separation between Weyl points of opposite topological charge, the Fermi arcs extent up to 75% of the reciprocal lattice vectors in length. This makes Ti2MnAl an excellent candidate for the comprehensive study of magneticWeyl semimetals. It is the first example of a material withWeyl points, large anomalous Hall effect, and angle despite a vanishing net magnetic moment.
收录类别	SCI ; SCIE ; EI
语种	英语
资助项目	DOE[DE-SC0017865]
WOS研究方向	Materials Science ; Physics
WOS类目	Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS记录号	WOS:000425602700001
出版者	AMER PHYSICAL SOC
EI入藏号	20191906874280
EI主题词	Aluminum alloys ; Carrier concentration ; Cobalt compounds ; Electric currents ; Ferrimagnetism ; Magnetic moments ; Magnetic structure ; Manganese alloys ; Ternary alloys ; Titanium alloys ; Topology
EI分类号	Aluminum Alloys:541.2 ; Titanium and Alloys:542.3 ; Manganese and Alloys:543.2 ; Electricity: Basic Concepts and Phenomena:701.1 ; Magnetism: Basic Concepts and Phenomena:701.2 ; Combinatorial Mathematics, Includes Graph Theory, Set Theory:921.4
WOS关键词	FERMI ARCS ; SURFACE ; INTERFERENCE ; SPINTRONICS ; SIGNATURES ; DISCOVERY ; CANDIDATE ; STATE ; PHASE ; BULK
原始文献类型	Article
引用统计
文献类型	期刊论文
条目标识符	https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/18281
专题	物质科学与技术学院_PI研究组_李刚组硬x射线自由电子激光装置项目
通讯作者	Sun, Yan
作者单位	1.Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany 2.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 200031, Peoples R China 3.Princeton Univ, Dept Chem, Princeton, NJ 08544 USA 4.Leibniz Inst Solid State & Mat Res, D-01069 Dresden, Germany 5.IFW Dresden, POB 270116, D-01171 Dresden, Germany
第一作者单位	物质科学与技术学院
推荐引用方式 GB/T 7714	Shi, Wujun,Muechler, Lukas,Manna, Kaustuv,et al. Prediction of a magnetic Weyl semimetal without spin-orbit coupling and strong anomalous Hall effect in the Heusler compensated ferrimagnet Ti2MnAl[J]. PHYSICAL REVIEW B,2018,97(6).
APA	Shi, Wujun.,Muechler, Lukas.,Manna, Kaustuv.,Zhang, Yang.,Koepernik, Klaus.,...&Sun, Yan.(2018).Prediction of a magnetic Weyl semimetal without spin-orbit coupling and strong anomalous Hall effect in the Heusler compensated ferrimagnet Ti2MnAl.PHYSICAL REVIEW B,97(6).
MLA	Shi, Wujun,et al."Prediction of a magnetic Weyl semimetal without spin-orbit coupling and strong anomalous Hall effect in the Heusler compensated ferrimagnet Ti2MnAl".PHYSICAL REVIEW B 97.6(2018).