Multi- k magnetic structure and large anomalous Hall effect in candidate magnetic Weyl semimetal NdAlGe

C. Dhital; R. L. Dally; R. Ruvalcaba; R. Gonzalez-Hernandez; J. Guerrero-Sanchez; H. B. Cao; Q. Zhang; W. Tian; Y. Wu; M. D. Frontzek; S. K. Karna; A. Meads; B. Wilson; R. Chapai; D. Graf; J. Bacsa; R. Jin; J. F. Ditusa

doi:10.1103/PhysRevB.107.224414

Multi- k magnetic structure and large anomalous Hall effect in candidate magnetic Weyl semimetal NdAlGe

C. Dhital, R. L. Dally, R. Ruvalcaba, R. Gonzalez-Hernandez, J. Guerrero-Sanchez, H. B. Cao, Q. Zhang, W. Tian, Y. Wu, M. D. Frontzek, S. K. Karna, A. Meads, B. Wilson, R. Chapai, D. Graf, J. Bacsa, R. Jin, J. F. Ditusa

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Abstract

The magnetic structure, magnetoresistance (MR), and Hall effect of the noncentrosymmetric magnetic semimetal NdAlGe are investigated, revealing an unusual magnetic state and anomalous transport properties that are associated with the electronic structure of this compound. The magnetization and MR measurements are both highly anisotropic and indicate an Ising-like magnetic system. The magnetic structure is complex in that it involves two magnetic ordering vectors, including an incommensurate spin density wave and commensurate ferrimagnetic state in zero field. We have discovered a large anomalous Hall conductivity that reaches ≈430ω-1cm-1, implying that it originates from an intrinsic Berry curvature effect stemming from Weyl nodes found in the electronic structure. These electronic structure calculations indicate the presence of nested Fermi surface pockets with nesting wave vectors like the measured magnetic ordering wave vector and the presence of Weyl nodes in proximity to the Fermi surface. We associate the incommensurate magnetic structure with the large anomalous Hall response to be the result of the combination of Fermi surface nesting and the Berry curvature associated with Weyl nodes.

Original language	English
Article number	224414
Journal	Physical Review B
Volume	107
Issue number	22
DOIs	https://doi.org/10.1103/PhysRevB.107.224414
State	Published - Jun 1 2023

Funding

C.D. acknowledges the helpful discussion with M. Asmar. This paper is based upon the work supported by the National Science Foundation under Grant No. DMR-2213443. The neutron diffraction experiments used resources at the HFIR, a U.S. Department of Energy (DOE) Office of Science User Facility operated by the ORNL. A portion of this work was performed at the NHMFL, which is supported by the National Science Foundation Cooperative Agreement No. DMR-1644779 and the State of Florida. The identification of any commercial product or trade name does not imply endorsement or recommendation by the National Institute of Standards and Technology. R.C. and R.J. are supported by the DOE Grant No. DE-SC0012432. R.R., R.G.-H., and J.G.-S. acknowledge DGAPA-UNAM Project No. IA100822 for partial financial support. Calculations were performed in the DGCTIC-UNAM Supercomputing Center project LANCADUNAM-DGTIC-368. J.G.-S. acknowledges A. Rodriguez-Guerrero for the technical support.

Funders	Funder number
National Science Foundation	DMR-1644779, DMR-2213443
U.S. Department of Energy	DE-SC0012432
State of Florida
Dirección General de Asuntos del Personal Académico, Universidad Nacional Autónoma de México	IA100822

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10.1103/PhysRevB.107.224414

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Dhital, C., Dally, R. L., Ruvalcaba, R., Gonzalez-Hernandez, R., Guerrero-Sanchez, J., Cao, H. B., Zhang, Q., Tian, W., Wu, Y., Frontzek, M. D., Karna, S. K., Meads, A., Wilson, B., Chapai, R., Graf, D., Bacsa, J., Jin, R., & Ditusa, J. F. (2023). Multi- k magnetic structure and large anomalous Hall effect in candidate magnetic Weyl semimetal NdAlGe. Physical Review B, 107(22), Article 224414. https://doi.org/10.1103/PhysRevB.107.224414

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title = "Multi- k magnetic structure and large anomalous Hall effect in candidate magnetic Weyl semimetal NdAlGe",

abstract = "The magnetic structure, magnetoresistance (MR), and Hall effect of the noncentrosymmetric magnetic semimetal NdAlGe are investigated, revealing an unusual magnetic state and anomalous transport properties that are associated with the electronic structure of this compound. The magnetization and MR measurements are both highly anisotropic and indicate an Ising-like magnetic system. The magnetic structure is complex in that it involves two magnetic ordering vectors, including an incommensurate spin density wave and commensurate ferrimagnetic state in zero field. We have discovered a large anomalous Hall conductivity that reaches ≈430ω-1cm-1, implying that it originates from an intrinsic Berry curvature effect stemming from Weyl nodes found in the electronic structure. These electronic structure calculations indicate the presence of nested Fermi surface pockets with nesting wave vectors like the measured magnetic ordering wave vector and the presence of Weyl nodes in proximity to the Fermi surface. We associate the incommensurate magnetic structure with the large anomalous Hall response to be the result of the combination of Fermi surface nesting and the Berry curvature associated with Weyl nodes.",

author = "C. Dhital and Dally, {R. L.} and R. Ruvalcaba and R. Gonzalez-Hernandez and J. Guerrero-Sanchez and Cao, {H. B.} and Q. Zhang and W. Tian and Y. Wu and Frontzek, {M. D.} and Karna, {S. K.} and A. Meads and B. Wilson and R. Chapai and D. Graf and J. Bacsa and R. Jin and Ditusa, {J. F.}",

note = "Publisher Copyright: {\textcopyright} 2023 American Physical Society. US.",

year = "2023",

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doi = "10.1103/PhysRevB.107.224414",

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Dhital, C, Dally, RL, Ruvalcaba, R, Gonzalez-Hernandez, R, Guerrero-Sanchez, J, Cao, HB , Zhang, Q , Tian, W , Wu, Y , Frontzek, MD, Karna, SK, Meads, A, Wilson, B, Chapai, R, Graf, D, Bacsa, J, Jin, R & Ditusa, JF 2023, 'Multi- k magnetic structure and large anomalous Hall effect in candidate magnetic Weyl semimetal NdAlGe', Physical Review B, vol. 107, no. 22, 224414. https://doi.org/10.1103/PhysRevB.107.224414

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T1 - Multi- k magnetic structure and large anomalous Hall effect in candidate magnetic Weyl semimetal NdAlGe

AU - Dhital, C.

AU - Dally, R. L.

AU - Ruvalcaba, R.

AU - Gonzalez-Hernandez, R.

AU - Guerrero-Sanchez, J.

AU - Cao, H. B.

AU - Zhang, Q.

AU - Tian, W.

AU - Wu, Y.

AU - Frontzek, M. D.

AU - Karna, S. K.

AU - Meads, A.

AU - Wilson, B.

AU - Chapai, R.

AU - Graf, D.

AU - Bacsa, J.

AU - Jin, R.

AU - Ditusa, J. F.

PY - 2023/6/1

Y1 - 2023/6/1

N2 - The magnetic structure, magnetoresistance (MR), and Hall effect of the noncentrosymmetric magnetic semimetal NdAlGe are investigated, revealing an unusual magnetic state and anomalous transport properties that are associated with the electronic structure of this compound. The magnetization and MR measurements are both highly anisotropic and indicate an Ising-like magnetic system. The magnetic structure is complex in that it involves two magnetic ordering vectors, including an incommensurate spin density wave and commensurate ferrimagnetic state in zero field. We have discovered a large anomalous Hall conductivity that reaches ≈430ω-1cm-1, implying that it originates from an intrinsic Berry curvature effect stemming from Weyl nodes found in the electronic structure. These electronic structure calculations indicate the presence of nested Fermi surface pockets with nesting wave vectors like the measured magnetic ordering wave vector and the presence of Weyl nodes in proximity to the Fermi surface. We associate the incommensurate magnetic structure with the large anomalous Hall response to be the result of the combination of Fermi surface nesting and the Berry curvature associated with Weyl nodes.

AB - The magnetic structure, magnetoresistance (MR), and Hall effect of the noncentrosymmetric magnetic semimetal NdAlGe are investigated, revealing an unusual magnetic state and anomalous transport properties that are associated with the electronic structure of this compound. The magnetization and MR measurements are both highly anisotropic and indicate an Ising-like magnetic system. The magnetic structure is complex in that it involves two magnetic ordering vectors, including an incommensurate spin density wave and commensurate ferrimagnetic state in zero field. We have discovered a large anomalous Hall conductivity that reaches ≈430ω-1cm-1, implying that it originates from an intrinsic Berry curvature effect stemming from Weyl nodes found in the electronic structure. These electronic structure calculations indicate the presence of nested Fermi surface pockets with nesting wave vectors like the measured magnetic ordering wave vector and the presence of Weyl nodes in proximity to the Fermi surface. We associate the incommensurate magnetic structure with the large anomalous Hall response to be the result of the combination of Fermi surface nesting and the Berry curvature associated with Weyl nodes.

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JO - Physical Review B

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Multi- k magnetic structure and large anomalous Hall effect in candidate magnetic Weyl semimetal NdAlGe

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