Tunable Anomalous Hall Effect in a Kagomé Ferromagnetic Weyl Semimetal

被引：0

作者：

Pate, Samuel E. ^{[1
,2
]}

Wang, Bin ^{[3
]}

Zhang, Yang ^{[4
,5
]}

Shen, Bing ^{[3
]}

Liu, Enke ^{[6
]}

Martin, Ivar ^{[1
]}

Jiang, J. Samuel ^{[1
]}

Zhou, Xiuquan ^{[1
]}

Chung, Duck Young ^{[1
]}

Kanatzidis, Mercouri G. ^{[1
,7
]}

Welp, Ulrich ^{[1
]}

Kwok, Wai-Kwong ^{[1
]}

Xiao, Zhi-Li ^{[1
,2
]}

机构：

[1] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA

[2] Northern Illinois Univ, Dept Phys, De Kalb, IL 60115 USA

[3] Sun Yat Sen Univ, Sch Phys, Guangzhou 510275, Peoples R China

[4] Univ Tennessee, Dept Phys, Knoxville, TN 37996 USA

[5] Univ Tennessee, Min H Kao Dept Elect Engn & Comp Sci, Knoxville, TN 37996 USA

[6] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

[7] Northwestern Univ, Dept Chem, Evanston, IL 60208 USA

来源：

ADVANCED SCIENCE | 2024年 / 11卷 / 43期

基金：

美国国家科学基金会; 国家重点研发计划;

关键词：

anomalous Hall effect; frustration; kagom & eacute; ferromagnet; weyl semimetal; ANGULAR VARIATION; PHASE;

D O I：

10.1002/advs.202406882

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Emerging from the intricate interplay of topology and magnetism, the giant anomalous Hall effect (AHE) is the most known topological property of the recently discovered kagom & eacute; ferromagnetic Weyl semimetal Co3Sn2S2 with the magnetic Co atoms arranged on a kagom & eacute; lattice. Here it is reported that the AHE in Co3Sn2S2 can be fine-tuned by an applied magnetic field orientated within approximate to 2 degrees of the kagom & eacute; plane, while beyond this regime, it stays unchanged. Particularly, it can vanish in magnetic fields parallel to the kagom & eacute; plane and even decrease in magnetic fields collinear with the spin direction. This tunable AHE can be attributed to local spin switching enabled by the geometrical frustration of the magnetic kagom & eacute; lattice, revealing that spins in a kagom & eacute; ferromagnet change their switching behavior as the magnetic field approaches the kagom & eacute; plane. These results also suggest a versatile way to tune the properties of a kagom & eacute; magnet. Angle-dependent Hall resistance measurements show that spins in kagom & eacute; ferromagnetic Weyl semimetal Co3Sn2S2 change their switching behavior as the external magnetic field approaches the kagom & eacute; plane, enabling the fine tuning of its anomalous Hall effect. These results reveal a remarkable interaction of the external magnetic field and the frustrated magnetic kagom & eacute; lattice. image

引用

页数：7

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