Anomalous Hall effect from inter-superlattice scattering in a noncollinear antiferromagnet

Lilia S. Xie; Shannon S. Fender; Cameron Mollazadeh; Wuzhang Fang; Matthias D. Frontzek; Samra Husremović; Kejun Li; Isaac M. Craig; Berit H. Goodge; Matthew P. Erodici; Oscar Gonzalez; Jonathan D. Denlinger; Yuan Ping; D. Kwabena Bediako

doi:10.1038/s41467-025-61211-4

Anomalous Hall effect from inter-superlattice scattering in a noncollinear antiferromagnet

Lilia S. Xie
, Shannon S. Fender
, Cameron Mollazadeh
, Wuzhang Fang
, Matthias D. Frontzek
, Samra Husremović
, Kejun Li
, Isaac M. Craig
, Berit H. Goodge
, Matthew P. Erodici
, Oscar Gonzalez
, Jonathan D. Denlinger
, Yuan Ping
, D. Kwabena Bediako

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3 Scopus citations

Abstract

Superlattice formation dictates the physical properties of many materials, including the nature of the ground state in magnetic materials. Chemical composition is commonly considered to be the primary determinant of superlattice identity, especially in intercalation compounds. Nevertheless, in this work, we find that kinetic control of superlattice growth leads to the coexistence of disparate crystallographic domains within a compositionally perfect single crystal. We demonstrate that Cr_1/4TaS₂ is a noncollinear antiferromagnet in which scattering between majority and minority superlattice domains engenders complex magnetotransport below the Néel temperature, including an anomalous Hall effect. We characterize the magnetic phases in different domains, image their nanoscale morphology, and propose a mechanism for nucleation and growth using a suite of experimental probes coupled with first-principles calculations and symmetry analysis. These results provide a blueprint for the deliberate engineering of macroscopic transport responses via microscopic tuning of magnetic exchange interactions in superlattice domains.

Original language	English
Article number	5711
Journal	Nature Communications
Volume	16
Issue number	1
DOIs	https://doi.org/10.1038/s41467-025-61211-4
State	Published - Dec 2025

Funding

We thank Sae Hee Ryu for assistance with ARPES measurements. This material is based upon work supported by the U.S. National Science Foundation, under award no. 2426144 (D.K.B.). A portion of this research used resources at the High Flux Isotope Reactor, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory. The beam time was allocated to WAND on proposal number IPTS-30492.1. This research used resources of the Advanced Light Source, which is a DOE Office of Science User Facility under contract no. DE-AC02-05CH11231. Work at the Molecular Foundry, LBNL, was supported by the Office of Science, Office of Basic Energy Sciences, the U.S. Department of Energy under Contract no. DE-AC02-05CH11231. Computational work in this paper used the Lux Supercomputer at UC Santa Cruz, funded by NSF MRI Grant No. AST 1828315. L.S.X. acknowledges support from the Arnold and Mabel Beckman Foundation through an Arnold O. Beckman Postdoctoral Fellowship (award no. 51532). B.H.G. was supported by the University of California Presidential Postdoctoral Fellowship Program (UC PPFP), Schmidt Science Fellows in partnership with the Rhodes Trust, and the Max Planck Society. O.G. acknowledges support from a NSF Graduate Research Fellowship Grant DGE 1752814. S.H. acknowledges support from the Blavatnik Innovation Fellowship. We thank Sae Hee Ryu for assistance with ARPES measurements. This material is based upon work supported by the U.S. National Science Foundation, under award no. 2426144 (D.K.B.). A portion of this research used resources at the High Flux Isotope Reactor, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory. The beam time was allocated to WAND2 on proposal number IPTS-30492.1. This research used resources of the Advanced Light Source, which is a DOE Office of Science User Facility under contract no. DE-AC02-05CH11231. Work at the Molecular Foundry, LBNL, was supported by the Office of Science, Office of Basic Energy Sciences, the U.S. Department of Energy under Contract no. DE-AC02-05CH11231. Computational work in this paper used the Lux Supercomputer at UC Santa Cruz, funded by NSF MRI Grant No. AST 1828315. L.S.X. acknowledges support from the Arnold and Mabel Beckman Foundation through an Arnold O. Beckman Postdoctoral Fellowship (award no. 51532). B.H.G. was supported by the University of California Presidential Postdoctoral Fellowship Program (UC PPFP), Schmidt Science Fellows in partnership with the Rhodes Trust, and the Max Planck Society. O.G. acknowledges support from a NSF Graduate Research Fellowship Grant DGE 1752814. S.H. acknowledges support from the Blavatnik Innovation Fellowship.

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10.1038/s41467-025-61211-4

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Xie, L. S., Fender, S. S., Mollazadeh, C., Fang, W., Frontzek, M. D., Husremović, S., Li, K., Craig, I. M., Goodge, B. H., Erodici, M. P., Gonzalez, O., Denlinger, J. D., Ping, Y., & Bediako, D. K. (2025). Anomalous Hall effect from inter-superlattice scattering in a noncollinear antiferromagnet. Nature Communications, 16(1), Article 5711. https://doi.org/10.1038/s41467-025-61211-4

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title = "Anomalous Hall effect from inter-superlattice scattering in a noncollinear antiferromagnet",

abstract = "Superlattice formation dictates the physical properties of many materials, including the nature of the ground state in magnetic materials. Chemical composition is commonly considered to be the primary determinant of superlattice identity, especially in intercalation compounds. Nevertheless, in this work, we find that kinetic control of superlattice growth leads to the coexistence of disparate crystallographic domains within a compositionally perfect single crystal. We demonstrate that Cr1/4TaS2 is a noncollinear antiferromagnet in which scattering between majority and minority superlattice domains engenders complex magnetotransport below the N{\'e}el temperature, including an anomalous Hall effect. We characterize the magnetic phases in different domains, image their nanoscale morphology, and propose a mechanism for nucleation and growth using a suite of experimental probes coupled with first-principles calculations and symmetry analysis. These results provide a blueprint for the deliberate engineering of macroscopic transport responses via microscopic tuning of magnetic exchange interactions in superlattice domains.",

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Anomalous Hall effect from inter-superlattice scattering in a noncollinear antiferromagnet

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