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

doi:10.1002/advs.202406882

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

Research output: Contribution to journal › Article › peer-review

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.

Original language	English
Article number	2406882
Journal	Advanced Science
Volume	11
Issue number	43
DOIs	https://doi.org/10.1002/advs.202406882
State	Published - Nov 20 2024

Funding

The authors thank Shizeng Lin, Igor V. Solovyev, and Vitalii Vlasko-Vlasov for stimulating discussions. Experimental design, transport, and magnetization measurements were supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering. S.E.P. and Z.L.X. acknowledge support from the National Science Foundation grant# DMR-1901843. Y.Z. was supported by the National Science Foundation Materials Research Science and Engineering Center program through the UT Knoxville Center for Advanced Materials and Manufacturing (DMR-2309083). B.W. and B.S. were supported by the National Key R&D Program of China (Grant No.2023YFF0718400), National Natural Sciences Foundation of China (Grant No.U2130101), and Guangzhou Basic and Applied Basic Research Foundation (Grant Nos. 2023B151520013, 2022A151501003). The authors thank Shizeng Lin, Igor V. Solovyev, and Vitalii Vlasko‐Vlasov for stimulating discussions. Experimental design, transport, and magnetization measurements were supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering. S.E.P. and Z.L.X. acknowledge support from the National Science Foundation grant# DMR‐1901843. Y.Z. was supported by the National Science Foundation Materials Research Science and Engineering Center program through the UT Knoxville Center for Advanced Materials and Manufacturing (DMR‐2309083). B.W. and B.S. were supported by the National Key R&D Program of China (Grant No.2023YFF0718400), National Natural Sciences Foundation of China (Grant No.U2130101), and Guangzhou Basic and Applied Basic Research Foundation (Grant Nos. 2023B151520013, 2022A151501003).

Keywords

anomalous Hall effect
frustration
kagomé ferromagnet
weyl semimetal

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10.1002/advs.202406882

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title = "Tunable Anomalous Hall Effect in a Kagom{\'e} Ferromagnetic Weyl Semimetal",

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

keywords = "anomalous Hall effect, frustration, kagom{\'e} ferromagnet, weyl semimetal",

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

note = "Publisher Copyright: {\textcopyright} 2024 The Author(s). Advanced Science published by Wiley-VCH GmbH.",

year = "2024",

month = nov,

day = "20",

doi = "10.1002/advs.202406882",

language = "English",

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AU - Pate, Samuel E.

AU - Wang, Bin

AU - Zhang, Yang

AU - Shen, Bing

AU - Liu, Enke

AU - Martin, Ivar

AU - Jiang, J. Samuel

AU - Zhou, Xiuquan

AU - Chung, Duck Young

AU - Kanatzidis, Mercouri G.

AU - Welp, Ulrich

AU - Kwok, Wai Kwong

AU - Xiao, Zhi Li

PY - 2024/11/20

Y1 - 2024/11/20

N2 - 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.

AB - 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.

KW - anomalous Hall effect

KW - frustration

KW - kagomé ferromagnet

KW - weyl semimetal

UR - https://www.scopus.com/pages/publications/85204762224

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DO - 10.1002/advs.202406882

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SN - 2198-3844

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JO - Advanced Science

JF - Advanced Science

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M1 - 2406882

ER -

Tunable Anomalous Hall Effect in a Kagomé Ferromagnetic Weyl Semimetal

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