Significant Chiral Magnetotransport Magnified by Multiple Weyl Nodes
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arXiv
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| Autores principales: | , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866929698836054016 |
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| author | Zhang, Bo Liao, Junbo Huang, Zhentao Shangguan, Yanyan Cheng, Shufan Xu, Hao Song, Zihang Dong, Shuai Bao, Song Wang, Rui Wen, Jinsheng |
| author_facet | Zhang, Bo Liao, Junbo Huang, Zhentao Shangguan, Yanyan Cheng, Shufan Xu, Hao Song, Zihang Dong, Shuai Bao, Song Wang, Rui Wen, Jinsheng |
| contents | The intertwining of magnetism with topology is known to give rise to exotic quantum phenomena. Here, we explore the magnetotransport properties of NdAlSi, a magnetic Weyl semimetal that spontaneously breaks inversion and time-reversal symmetries and hosts a large number of Weyl nodes. We observe a significant negative magnetoresistance, which we attribute to the chiral anomaly associated with multiple Weyl nodes. Remarkably, the extracted chiral coefficient reaches approximately $52~\mathrm{mΩ}^{-1}~\mathrm{m}^{-1}~\mathrm{T}^{-2}$, larger than many other topological materials. Additionally, we observe an exotic anomalous Hall effect with an out-of-sync behavior, where the anomalous Hall resistance does not exactly follow the field dependence of the magnetization, in contrast to that in conventional ferromagnets. These rich quantum transport phenomena, driven by the interplay between magnetism and Weyl nodes, establish NdAlSi as a prime platform for exploring the intricate topological behaviors of magnetic Weyl semimetals. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_03015 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Significant Chiral Magnetotransport Magnified by Multiple Weyl Nodes Zhang, Bo Liao, Junbo Huang, Zhentao Shangguan, Yanyan Cheng, Shufan Xu, Hao Song, Zihang Dong, Shuai Bao, Song Wang, Rui Wen, Jinsheng Mesoscale and Nanoscale Physics Strongly Correlated Electrons The intertwining of magnetism with topology is known to give rise to exotic quantum phenomena. Here, we explore the magnetotransport properties of NdAlSi, a magnetic Weyl semimetal that spontaneously breaks inversion and time-reversal symmetries and hosts a large number of Weyl nodes. We observe a significant negative magnetoresistance, which we attribute to the chiral anomaly associated with multiple Weyl nodes. Remarkably, the extracted chiral coefficient reaches approximately $52~\mathrm{mΩ}^{-1}~\mathrm{m}^{-1}~\mathrm{T}^{-2}$, larger than many other topological materials. Additionally, we observe an exotic anomalous Hall effect with an out-of-sync behavior, where the anomalous Hall resistance does not exactly follow the field dependence of the magnetization, in contrast to that in conventional ferromagnets. These rich quantum transport phenomena, driven by the interplay between magnetism and Weyl nodes, establish NdAlSi as a prime platform for exploring the intricate topological behaviors of magnetic Weyl semimetals. |
| title | Significant Chiral Magnetotransport Magnified by Multiple Weyl Nodes |
| topic | Mesoscale and Nanoscale Physics Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2502.03015 |