Universal scaling law for chiral antiferromagnetism

Shijie Xu, Bingqian Dai, Yuhao Jiang, Danrong Xiong, Houyi Cheng, Lixuan Tai, Meng Tang, Yadong Sun, Yu He, Baolin Yang, Yong Peng, Kang L. Wang and Weisheng Zhao ()
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Shijie Xu: Beihang University
Bingqian Dai: University of California
Yuhao Jiang: Beihang University
Danrong Xiong: Beihang University
Houyi Cheng: Beihang University
Lixuan Tai: University of California
Meng Tang: Tongji University
Yadong Sun: Tongji University
Yu He: Beihang University
Baolin Yang: Lanzhou University
Yong Peng: Lanzhou University
Kang L. Wang: University of California
Weisheng Zhao: Beihang University

Nature Communications, 2024, vol. 15, issue 1, 1-7

Abstract: Abstract The chiral antiferromagnetic (AFM) materials, which have been widely investigated due to their rich physics, such as non-zero Berry phase and topology, provide a platform for the development of antiferromagnetic spintronics. Here, we find two distinctive anomalous Hall effect (AHE) contributions in the chiral AFM Mn3Pt, originating from a time-reversal symmetry breaking induced intrinsic mechanism and a skew scattering induced topological AHE due to an out-of-plane spin canting with respect to the Kagome plane. We propose a universal AHE scaling law to explain the AHE resistivity ( $${{\rho }}_{AH}$$ ρ A H ) in this chiral magnet, with both a scalar spin chirality (SSC)-induced skew scattering topological AHE term, $${a}_{sk}$$ a s k and non-collinear spin-texture induced intrinsic anomalous Hall term, $${{b}}_{{in}}$$ b i n . We found that $${{{a}}}_{{{sk}}}$$ a s k and $${{{b}}}_{{{in}}}$$ b i n can be effectively modulated by the interfacial electron scattering, exhibiting a linear relation with the inverse film thickness. Moreover, the scaling law can explain the anomalous Hall effect in various chiral magnets and has far-reaching implications for chiral-based spintronics devices.

Date: 2024
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DOI: 10.1038/s41467-024-46325-5

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