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journal article·2024-11Open access

Tunable Anomalous Hall Effect in a Kagomé Ferromagnetic Weyl Semimetal

Samuel E. Pate, Bin Wang, Yang Zhang, Bing Shen, Enke Liu, Ivar Martin, J. Samuel Jiang, Xiuquan Zhou, Duck Young Chung, Mercouri G. Kanatzidis, Ulrich Welp, Wai‐Kwong Kwok, Zhi‐Li Xiao

Advanced Science· Volume 11· Issue 43
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Source abstract

Abstract

Abstract 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 kagomé ferromagnetic Weyl semimetal Co3Sn2S2 with the magnetic Co atoms arranged on a kagomé lattice. Here it is reported that the AHE in Co3Sn2S2 can be fine‐tuned by an applied magnetic field orientated within ≈2° of the kagomé plane, while beyond this regime, it stays unchanged. Particularly, it can vanish in magnetic fields parallel to the kagomé 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 kagomé lattice, revealing that spins in a kagomé ferromagnet change their switching behavior as the magnetic field approaches the kagomé plane. These results also suggest a versatile way to tune the properties of a kagomé magnet.
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Research context

OpenAlex topics: Topological Materials and Phenomena · Advanced Condensed Matter Physics · Multiferroics and related materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Materials Science Division Argonne National Laboratory Argonne 60439 USA

Department of Physics Northern Illinois University DeKalb 60115 USA

School of Physics Sun Yat‐sen University Guangzhou 510275 China

Department of Physics University of Tennessee Knoxville 37996 USA

Min H. Kao Department of Electrical Engineering and Computer Science University of Tennessee Knoxville 37996 USA

Institute of Physics Chinese Academy of Sciences Beijing 100190 China

Department of Chemistry Northwestern University Evanston 60208 USA

Funding

U.S. Department of Energy · Office of Science · National Science Foundation · National Key Research and Development Program of China · National Natural Science Foundation of China

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