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Research Highlight | Materials Science Division

Nematic spin chirality in YMn6Sn6

In a study published in Science Advances, researchers report pivotal insights into the properties of a Kagone-net metal, YMn6Sn6.

Scientific Achievement

We mapped the temperature and field locus of the topological Hall effect in centro-symmetric YMn6S6 and explained its origin through population of chiral magnons.

Significance and Impact

Fluctuation-driven chiral nematicity represents a completely new approach for generating a topological Hall current, distinct from skyrmionic or non-coplanar mechanisms because it emerges from a nonchiral static spin configuration.

Research Details

  • Single crystal neutron diffraction in field reveals cascading set of magnetic phase transitions.
  • DFT calculations explain the progression of observed magnetic phases.
  • Phenomenological theory explains topological Hall signal as arising from strong nematic chiral fluctuations.
     

DOI10.1126/sciadv.abe2680

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