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Research Highlight | Materials Science Division

Topological hall effect in a magnetic layered dichalcogenide

In a study published in Nature Communications, researchers attributed the anomalous Hall effect to either formation of a complex magnetic texture or the combined effect of the small intrinsic moment on the electronic band structure.

Scientific Achievement

We report an exceptionally large anomalous Hall effect in an antiferromagnetic, intercalated layered dichal-cogenide, reflecting topological characteristics arising either from Weyl nodes or magnetic textures.

Significance and Impact

Our work reveals a field-induced signature of the topological state—either electronic or magnetic—and offers a new, highly flexible materials platform upon which to build topological electronic states.

Research Details

  • Noncentrosymmetric, antiferromagnetic CoNb3S6 exhibits a large anomalous Hall effect (AHE) in a narrow temperature window below the Néel transition.
  • A Weyl node is found within a few meV of the calculated Fermi level, pointing to a field-driven band structure response as a potential origin of the AHE.

DOI10.1038/s41467-018-05756-7

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