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Anomalous transverse response in nodal line semimetal ${Mn}_{3} SnC$

¹School of Physical Sciences, Indian Institute of Technology Mandi, Kamand, Mandi, Himachal Pradesh 175075, India
²Center for Quantum Science and Technologies, Indian Institute of Technology Mandi, Kamand, Mandi, Himachal Pradesh 175075, India

^*Contact author: shekhar@iitmandi.ac.in

Phys. Rev. Materials 10, 074201 – Published 10 July, 2026

DOI: https://doi.org/10.1103/9q2x-t2s7

Abstract

The interplay of topological surface states and magnetism gives rise to the unconventional transport behaviors such as anomalous Hall effect (AHE) and anomalous Nernst effect (ANE). The antiperovskites like ${Mn}_{3} SnC$ , which are nodal-line semimetal and exhibits concurrent antiferromagnetic (AFM)-ferromagnetic (FM) ordering offer a fertile ground for anomalous transport. Here we report that the anomalous transport (AHE and ANE) in the compound is mainly dominated by the intrinsic Berry curvature effect. We establish a unified relationship between the AHE and ANE using Mott's relation. The scattering of electrons with both antiferromagnetic and ferromagnetic magnons is manifested in the anomalous Nernst signal. The ratio of anomalous Nernst conductivity to anomalous Hall conductivity $(| α_{x y}^{A} / σ_{x y}^{A} |)$ is a sizable fraction of $k_{B} / e$ , which points toward the stronger contribution of the Berry curvature to the ANE.

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Anomalous transverse response in nodal line semimetal ${Mn}_{3} SnC$

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Anomalous transverse response in nodal line semimetal Mn3SnC

Abstract

Physics Subject Headings (PhySH)

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Anomalous transverse response in nodal line semimetal ${Mn}_{3} SnC$