Quenching of Nonrelativistic p-Wave Spin Splitting by c-f Decoupling in CeNiAsO
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arXiv
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| Main Authors: | , , , , , , , , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866914623452610560 |
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| author | Zhang, Xinnuo Jiang, Zhicheng Shen, Shibo Yuan, Jian Yoo, Junseo Kim, Changyoung Ye, Mao Liu, Jishan Liu, Zhengtai Guo, Yanfeng Wang, Yilin Shen, Dawei |
| author_facet | Zhang, Xinnuo Jiang, Zhicheng Shen, Shibo Yuan, Jian Yoo, Junseo Kim, Changyoung Ye, Mao Liu, Jishan Liu, Zhengtai Guo, Yanfeng Wang, Yilin Shen, Dawei |
| contents | The extending of spin-space group symmetries to coplanar antiferromagnets has predicted the emergence of odd-parity nonrelativistic spin splittings, making the identification of a practical $p$-wave magnet a central pursuit in spintronics. The layered heavy-fermion oxypnictide CeNiAsO has been widely regarded as the prototypical platform to verify this paradigm, as its commensurate coplanar magnetic configuration is theoretically expected to induce a robust $p$-wave band splitting. Here, we investigate the electronic structure of single-crystal CeNiAsO using ultra-low-temperature, high-resolution, and resonant angle-resolved photoemission spectroscopy (ARPES). Across the consecutive magnetic transitions into the ordered phases, our spectroscopic data reveal neither the expected band folding associated with a spin density wave nor any observable $p$-wave band splitting, demonstrating that the conduction bands retain full Kramers degeneracy. By tracking the temperature dependence of the Ce 4$f$ spectral weight via resonant ARPES, we find no evidence of coherent $c-f$ hybridization near the Fermi level within the magnetically ordered states, confirming that the Ce 4$f$ electrons operate in the localized limit. Our findings establish a clear many-body constraint on projecting real-space magnetic symmetries onto momentum-space electronic bands, demonstrating that geometric symmetry classifications constitute a necessary framework but are not a sufficient condition for nonrelativistic spin splittings in the presence of strong electronic correlations. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2606_02420 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Quenching of Nonrelativistic p-Wave Spin Splitting by c-f Decoupling in CeNiAsO Zhang, Xinnuo Jiang, Zhicheng Shen, Shibo Yuan, Jian Yoo, Junseo Kim, Changyoung Ye, Mao Liu, Jishan Liu, Zhengtai Guo, Yanfeng Wang, Yilin Shen, Dawei Strongly Correlated Electrons Materials Science The extending of spin-space group symmetries to coplanar antiferromagnets has predicted the emergence of odd-parity nonrelativistic spin splittings, making the identification of a practical $p$-wave magnet a central pursuit in spintronics. The layered heavy-fermion oxypnictide CeNiAsO has been widely regarded as the prototypical platform to verify this paradigm, as its commensurate coplanar magnetic configuration is theoretically expected to induce a robust $p$-wave band splitting. Here, we investigate the electronic structure of single-crystal CeNiAsO using ultra-low-temperature, high-resolution, and resonant angle-resolved photoemission spectroscopy (ARPES). Across the consecutive magnetic transitions into the ordered phases, our spectroscopic data reveal neither the expected band folding associated with a spin density wave nor any observable $p$-wave band splitting, demonstrating that the conduction bands retain full Kramers degeneracy. By tracking the temperature dependence of the Ce 4$f$ spectral weight via resonant ARPES, we find no evidence of coherent $c-f$ hybridization near the Fermi level within the magnetically ordered states, confirming that the Ce 4$f$ electrons operate in the localized limit. Our findings establish a clear many-body constraint on projecting real-space magnetic symmetries onto momentum-space electronic bands, demonstrating that geometric symmetry classifications constitute a necessary framework but are not a sufficient condition for nonrelativistic spin splittings in the presence of strong electronic correlations. |
| title | Quenching of Nonrelativistic p-Wave Spin Splitting by c-f Decoupling in CeNiAsO |
| topic | Strongly Correlated Electrons Materials Science |
| url | https://arxiv.org/abs/2606.02420 |