Suppression of p-Wave Altermagnetism by Localized 4f Electrons in CeNiAsO
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arXiv
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| Natura: | Preprint |
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2026
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| _version_ | 1866911741937451008 |
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| author | Zhang, Jiuxiang Sun, Yueyang Zhou, Honglin Shi, Jumin Wu, Di Gu, Hongze Mao, Wenjin Dong, Hengrui Xu, Yu Li, Yinghao Cao, Ziling Miao, Taimin Liang, Bo Cai, Neng Zhu, Wenpei Xu, Mingkai Chen, Jiaqi Deng, Chunhong Liu, Bo Ma, Xun Liu, Zhengtai Ye, Mao Zhang, Shenjin Wang, Zhimin Zhang, Fengfeng Yang, Feng Peng, Qinjun Xu, Zuyan Liu, Guodong Li, Xintong Mao, Hanqing Li, Shiliang Weng, Hongming Zhao, Lin Zhou, X. J. |
| author_facet | Zhang, Jiuxiang Sun, Yueyang Zhou, Honglin Shi, Jumin Wu, Di Gu, Hongze Mao, Wenjin Dong, Hengrui Xu, Yu Li, Yinghao Cao, Ziling Miao, Taimin Liang, Bo Cai, Neng Zhu, Wenpei Xu, Mingkai Chen, Jiaqi Deng, Chunhong Liu, Bo Ma, Xun Liu, Zhengtai Ye, Mao Zhang, Shenjin Wang, Zhimin Zhang, Fengfeng Yang, Feng Peng, Qinjun Xu, Zuyan Liu, Guodong Li, Xintong Mao, Hanqing Li, Shiliang Weng, Hongming Zhao, Lin Zhou, X. J. |
| contents | Altermagnetism, characterized by momentum-dependent spin splitting and zero net magnetization, has so far been explored mainly in weakly or moderately correlated d-electron systems. How such symmetry-allowed band splitting manifests in heavy-fermion materials, where magnetic exchange competes with Kondo correlations, remains unclear. Here we use high-resolution angle-resolved photoemission spectroscopy to investigate CeNiAsO, a heavy-fermion candidate for p-wave altermagnetism. Despite macroscopic signatures consistent with the proposed p-wave magnetic order, we find no resolvable near-Fermi-level p-wave exchange splitting on the Ni 3d-derived conduction bands across the Neel transitions. Fermi-surface mapping, orbital-resolved ARPES identify that the low-energy electronic structure is dominated by Ni 3d bands, while resonant photoemission reveals that the Ce 4f states remain predominantly localized with residual c-f hybridization. First-principles calculations further show that an uncorrected itinerant-4f description produces dispersive Ce 4f bands and additional Fermi-surface pockets that are absent in experiment, thereby overestimating both the low-energy c-f hybridization and the exchange splitting transferred to the Ni 3d bands. When the localized Ce 4f character is incorporated through DFT+U , the experimental Fermi-surface topology is recovered and the residual p-wave splitting on the Ni 3d-derived bands is reduced to only a few meV, below the effective experimental resolution. These results identify CeNiAsO as a strongly correlated f-electron limit of p-wave magnetism, in which localized 4f electrons suppress the observable single-particle band-splitting signature expected from a weak-correlation picture. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2606_02422 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Suppression of p-Wave Altermagnetism by Localized 4f Electrons in CeNiAsO Zhang, Jiuxiang Sun, Yueyang Zhou, Honglin Shi, Jumin Wu, Di Gu, Hongze Mao, Wenjin Dong, Hengrui Xu, Yu Li, Yinghao Cao, Ziling Miao, Taimin Liang, Bo Cai, Neng Zhu, Wenpei Xu, Mingkai Chen, Jiaqi Deng, Chunhong Liu, Bo Ma, Xun Liu, Zhengtai Ye, Mao Zhang, Shenjin Wang, Zhimin Zhang, Fengfeng Yang, Feng Peng, Qinjun Xu, Zuyan Liu, Guodong Li, Xintong Mao, Hanqing Li, Shiliang Weng, Hongming Zhao, Lin Zhou, X. J. Strongly Correlated Electrons Materials Science Altermagnetism, characterized by momentum-dependent spin splitting and zero net magnetization, has so far been explored mainly in weakly or moderately correlated d-electron systems. How such symmetry-allowed band splitting manifests in heavy-fermion materials, where magnetic exchange competes with Kondo correlations, remains unclear. Here we use high-resolution angle-resolved photoemission spectroscopy to investigate CeNiAsO, a heavy-fermion candidate for p-wave altermagnetism. Despite macroscopic signatures consistent with the proposed p-wave magnetic order, we find no resolvable near-Fermi-level p-wave exchange splitting on the Ni 3d-derived conduction bands across the Neel transitions. Fermi-surface mapping, orbital-resolved ARPES identify that the low-energy electronic structure is dominated by Ni 3d bands, while resonant photoemission reveals that the Ce 4f states remain predominantly localized with residual c-f hybridization. First-principles calculations further show that an uncorrected itinerant-4f description produces dispersive Ce 4f bands and additional Fermi-surface pockets that are absent in experiment, thereby overestimating both the low-energy c-f hybridization and the exchange splitting transferred to the Ni 3d bands. When the localized Ce 4f character is incorporated through DFT+U , the experimental Fermi-surface topology is recovered and the residual p-wave splitting on the Ni 3d-derived bands is reduced to only a few meV, below the effective experimental resolution. These results identify CeNiAsO as a strongly correlated f-electron limit of p-wave magnetism, in which localized 4f electrons suppress the observable single-particle band-splitting signature expected from a weak-correlation picture. |
| title | Suppression of p-Wave Altermagnetism by Localized 4f Electrons in CeNiAsO |
| topic | Strongly Correlated Electrons Materials Science |
| url | https://arxiv.org/abs/2606.02422 |