AWhat changed
Independent teams measured a sizable, hysteretic transverse thermoelectric response in the noncollinear antiferromagnet Mn3Sn near room temperature despite its small net magnetization. Ikhlas and colleagues reported a remanent Nernst signal of about 0.35 microvolt per kelvin at 300 K in one crystal. Li and colleagues additionally measured anomalous thermal Hall transport and found its ratio to electrical Hall transport approximately consistent with the Wiedemann–Franz value over their measured high-temperature magnetic phase. Berry-curvature calculations and transport comparisons supplied an interpretation of the response.
Scientific scope
Independent teams measured a sizable, hysteretic transverse thermoelectric response in the noncollinear antiferromagnet Mn3Sn near room temperature despite its small net magnetization. Ikhlas and colleagues reported a remanent Nernst signal of about 0.35 microvolt per kelvin at 300 K in one crystal. Li and colleagues additionally measured anomalous thermal Hall transport and found its ratio to electrical Hall transport approximately consistent with the Wiedemann–Franz value over their measured high-temperature magnetic phase. Berry-curvature calculations and transport comparisons supplied an interpretation of the response. This family combines two independent experimental originals, with separate bylines, sample compositions, magnetic phases and uncertainties. Zero-field values are remanent signals after magnetic preparation. Full hysteretic jumps differ from a single-branch signal. The thermal Hall comparison has appreciable contact and geometrical uncertainties; it does not uniquely establish a microscopic mechanism. Calculated Weyl-point and Fermi-energy explanations are model interpretations, and useful thermoelectric generators were proposed rather than demonstrated.
Evidence
The linked original works support the scoped statement and contribution attribution. WRS has not independently replayed experiments or reconstructed a full mathematical proof. This family combines two independent experimental originals, with separate bylines, sample compositions, magnetic phases and uncertainties. Zero-field values are remanent signals after magnetic preparation. Full hysteretic jumps differ from a single-branch signal. The thermal Hall comparison has appreciable contact and geometrical uncertainties; it does not uniquely establish a microscopic mechanism. Calculated Weyl-point and Fermi-energy explanations are model interpretations, and useful thermoelectric generators were proposed rather than demonstrated.
Contributors
- The named authors in the research record · SCIENCE: These are the listed authors of the cited contribution sources. Paper authorship does not quantify individual effort. An incomplete list is explicitly marked; same names are not automatically merged.
- Anomalous Nernst and Righi-Leduc Effects in Mn3Sn: Berry curvature and Entropy flow (arXiv1612.06128v4)
- Large anomalous Nernst effect at room temperature in a chiral antiferromagnet (arXiv1710.00062v1)
Provisional WRS assessment, edition 2026-10-28.1. Independent expert calibration is pending. This grade does not certify correctness or assign ownership.
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