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arXiv · 2508.06979

Anomalous Hall and Nernst effects in the Two-Dimensional ferromagnetic metal FePd2Te2

Yazhou Li·Jiaxing Liao·Jiajun Ma·Yuwei Zhang·Tao Li·Jialu Wang·Hangdong Wang·Hanjie Guo·Jianhui Dai·Yuke Li
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Abstract

The transverse thermoelectric effect enables simpler, more flexible thermoelectric devices by generating electricity perpendicular to heat flow, offering promising solutions for waste heat recovery and solid-state cooling applications. Here, we report a striking observation of zero-field anomalous Hall effect (AHE) and anomalous Nernst effect (ANE) below TC in the two-dimensional metallic magnet FePd2Te2. The anomalous Nernst signal Syx^A peaks a maximum value of 0.15 {\mu}V/K at 100 K, much larger than that of conventional FM materials. Remarkably, the derived ratio alpha_ij/sigma_ij in FePd2Te2 approaches the fundamental limit of 86 {\mu}V/K. Our findings suggest a dominant Berry curvature contribution to the ANE. The observed giant zero-field anomalous Nernst response in 2D FePd2Te2 not only advances fundamental understanding of transverse thermoelectricity in layered magnets, but also provides this material as a promising candidate for practical thermoelectric spintronic applications.

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Yazhou Li, Jiaxing Liao, Jiajun Ma, Yuwei Zhang, Tao Li, Jialu Wang, Hangdong Wang, Hanjie Guo, Jianhui Dai, Yuke Li. 2025-08-09. Anomalous Hall and Nernst effects in the Two-Dimensional ferromagnetic metal FePd2Te2. https://doi.org/10.1016/j.solidstatesciences.2025.108044

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