Electronic Origin of Density Wave Orders in a Trilayer Nickelate
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arXiv
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2026
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| author | Yang, Jiangang Zhan, Jun Miao, Taimin Huo, Mengwu Xu, Qichen Li, Yinghao Xie, Yuyang Liang, Bo Cai, Neng Chen, Hao Zhu, Wenpei Xu, Mingkai Zhang, Shenjin Zhang, Fengfeng Yang, Feng Wang, Zhimin Peng, Qinjun Mao, Hanqing Li, Xintong Zhu, Zhihai Liu, Guodong Xu, Zuyan Hu, Jiangping Wu, Xianxin Wang, Meng Zhao, Lin Zhou, X. J. |
| author_facet | Yang, Jiangang Zhan, Jun Miao, Taimin Huo, Mengwu Xu, Qichen Li, Yinghao Xie, Yuyang Liang, Bo Cai, Neng Chen, Hao Zhu, Wenpei Xu, Mingkai Zhang, Shenjin Zhang, Fengfeng Yang, Feng Wang, Zhimin Peng, Qinjun Mao, Hanqing Li, Xintong Zhu, Zhihai Liu, Guodong Xu, Zuyan Hu, Jiangping Wu, Xianxin Wang, Meng Zhao, Lin Zhou, X. J. |
| contents | The discovery of superconductivity in Ruddlesden-Popper nickelates has established a new frontier in the study of high-temperature superconductors. However, the underlying pairing mechanism and its relationship to the material's electronic and magnetic ground states remain elusive. Since unconventional superconductivity often emerges from a complex interplay of magnetic correlations, elucidating the magnetic ground state of the nickelates at ambient pressure is crucial for understanding the emergence of superconductivity under high pressure. Here, we combine high-resolution angle-resolved photoemission spectroscopy with tight-binding model simulation to investigate the electronic structure of the representative trilayer Ruddlesden-Popper nickelate La$_4$Ni$_3$O$_{10}$. We provide the first experimental evidence of band splitting induced by interlayer coupling and further resolve the momentum-dependent density wave gap structures along all the Fermi surfaces. Our findings identify the mirror-selective Fermi surface nesting as the origin of the interlayer antiferromagnetic spin density wave and demonstrate the dominant role of Ni-3d$_{z^2}$ orbitals in the low-energy physics of La$_4$Ni$_3$O$_{10}$. These results provide a fundamental framework for understanding the magnetic interactions and high-temperature superconductivity mechanism in the Ruddlesden-Popper nickelate family. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_22608 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Electronic Origin of Density Wave Orders in a Trilayer Nickelate Yang, Jiangang Zhan, Jun Miao, Taimin Huo, Mengwu Xu, Qichen Li, Yinghao Xie, Yuyang Liang, Bo Cai, Neng Chen, Hao Zhu, Wenpei Xu, Mingkai Zhang, Shenjin Zhang, Fengfeng Yang, Feng Wang, Zhimin Peng, Qinjun Mao, Hanqing Li, Xintong Zhu, Zhihai Liu, Guodong Xu, Zuyan Hu, Jiangping Wu, Xianxin Wang, Meng Zhao, Lin Zhou, X. J. Superconductivity Materials Science Strongly Correlated Electrons The discovery of superconductivity in Ruddlesden-Popper nickelates has established a new frontier in the study of high-temperature superconductors. However, the underlying pairing mechanism and its relationship to the material's electronic and magnetic ground states remain elusive. Since unconventional superconductivity often emerges from a complex interplay of magnetic correlations, elucidating the magnetic ground state of the nickelates at ambient pressure is crucial for understanding the emergence of superconductivity under high pressure. Here, we combine high-resolution angle-resolved photoemission spectroscopy with tight-binding model simulation to investigate the electronic structure of the representative trilayer Ruddlesden-Popper nickelate La$_4$Ni$_3$O$_{10}$. We provide the first experimental evidence of band splitting induced by interlayer coupling and further resolve the momentum-dependent density wave gap structures along all the Fermi surfaces. Our findings identify the mirror-selective Fermi surface nesting as the origin of the interlayer antiferromagnetic spin density wave and demonstrate the dominant role of Ni-3d$_{z^2}$ orbitals in the low-energy physics of La$_4$Ni$_3$O$_{10}$. These results provide a fundamental framework for understanding the magnetic interactions and high-temperature superconductivity mechanism in the Ruddlesden-Popper nickelate family. |
| title | Electronic Origin of Density Wave Orders in a Trilayer Nickelate |
| topic | Superconductivity Materials Science Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2601.22608 |