Incommensurate magnetic order drives singular angular magnetoresistance in a Weyl semimetal
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arXiv
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| Autori principali: | , , , , , , , , , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| author | Yao, X. Chen, P. Verma, R. Zhao, X. Yang, H. -Y. DeBeer-Schmitt, L. Aczel, A. A. Wu, C. -M. Venero, D. Alba Ohhara, T. Munakata, K. Takahashi, M. Noda, Y. Bansil, A. Singh, B. Nikolić, P. Tafti, F. Gaudet, J. |
| author_facet | Yao, X. Chen, P. Verma, R. Zhao, X. Yang, H. -Y. DeBeer-Schmitt, L. Aczel, A. A. Wu, C. -M. Venero, D. Alba Ohhara, T. Munakata, K. Takahashi, M. Noda, Y. Bansil, A. Singh, B. Nikolić, P. Tafti, F. Gaudet, J. |
| contents | We demonstrate that a multi-$\mathbf{k}$ incommensurate magnetic state in the Weyl semimetal CeAlGe gives rise to singular angular magnetoresistance (SAMR), an electrical-transport signature that detects the magnetic-field direction with exceptional precision. In contrast, the sister compound CeAlSi shows neither multi-$\mathbf{k}$ order nor SAMR. Both phenomena emerge upon $\sim57\%$ Ge substitution in CeAlSi$_{1-x}$Ge$_x$ and coincide with electronic-structure changes that soften the single-ion in-plane anisotropy and enhance Weyl-mediated magnetic interactions. These results reveal a direct connection between band topology, electronic transport, and collective magnetism in Weyl semimetals. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_18398 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Incommensurate magnetic order drives singular angular magnetoresistance in a Weyl semimetal Yao, X. Chen, P. Verma, R. Zhao, X. Yang, H. -Y. DeBeer-Schmitt, L. Aczel, A. A. Wu, C. -M. Venero, D. Alba Ohhara, T. Munakata, K. Takahashi, M. Noda, Y. Bansil, A. Singh, B. Nikolić, P. Tafti, F. Gaudet, J. Strongly Correlated Electrons We demonstrate that a multi-$\mathbf{k}$ incommensurate magnetic state in the Weyl semimetal CeAlGe gives rise to singular angular magnetoresistance (SAMR), an electrical-transport signature that detects the magnetic-field direction with exceptional precision. In contrast, the sister compound CeAlSi shows neither multi-$\mathbf{k}$ order nor SAMR. Both phenomena emerge upon $\sim57\%$ Ge substitution in CeAlSi$_{1-x}$Ge$_x$ and coincide with electronic-structure changes that soften the single-ion in-plane anisotropy and enhance Weyl-mediated magnetic interactions. These results reveal a direct connection between band topology, electronic transport, and collective magnetism in Weyl semimetals. |
| title | Incommensurate magnetic order drives singular angular magnetoresistance in a Weyl semimetal |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2509.18398 |