Evolution of Electronic Correlations in the Ruddlesden-Popper Nickelates
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arXiv
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| Main Authors: | , , , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866917835982241792 |
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| author | Liu, Zhe Li, Jie Huo, Mengwu Ji, Bingke Hao, Jiahao Dai, Yaomin Ou, Mengjun Li, Qing Sun, Hualei Xu, Bing Lu, Yi Wang, Meng Wen, Hai-Hu |
| author_facet | Liu, Zhe Li, Jie Huo, Mengwu Ji, Bingke Hao, Jiahao Dai, Yaomin Ou, Mengjun Li, Qing Sun, Hualei Xu, Bing Lu, Yi Wang, Meng Wen, Hai-Hu |
| contents | We report on optical studies of the Ruddlesden-Popper nickelates La$_{n+1}$Ni$_{n}$O$_{3n+1}$ with $n = 2$ (La$_{3}$Ni$_{2}$O$_{7}$), $n = 3$ (La$_{4}$Ni$_{3}$O$_{10}$) and $n = \infty$ (LaNiO$_{3}$). As the number of the NiO$_{6}$ octahedra layers $n$ grows, the ratio of the kinetic energy determined from the experimental optical conductivity and that from band theory $K_{\text{exp}}/K_{\text{band}}$ increases, suggesting a reduction of electronic correlations. While the strong electronic correlations in the bilayer La$_{3}$Ni$_{2}$O$_{7}$ place it on the verge of the Mott insulating phase, the trilayer La$_{4}$Ni$_{3}$O$_{10}$ and infinite-layer LaNiO$_{3}$ exhibit moderate electronic correlations, falling into the regime of correlated metals. The evolution of the electronic correlations in La$_{n+1}$Ni$_{n}$O$_{3n+1}$ is likely to be dominated by the Ni-$d_{z^2}$ orbital. Our results provide important information for understanding the superconductivity in Ruddlesden-Popper nickelates. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2411_08539 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Evolution of Electronic Correlations in the Ruddlesden-Popper Nickelates Liu, Zhe Li, Jie Huo, Mengwu Ji, Bingke Hao, Jiahao Dai, Yaomin Ou, Mengjun Li, Qing Sun, Hualei Xu, Bing Lu, Yi Wang, Meng Wen, Hai-Hu Superconductivity Strongly Correlated Electrons We report on optical studies of the Ruddlesden-Popper nickelates La$_{n+1}$Ni$_{n}$O$_{3n+1}$ with $n = 2$ (La$_{3}$Ni$_{2}$O$_{7}$), $n = 3$ (La$_{4}$Ni$_{3}$O$_{10}$) and $n = \infty$ (LaNiO$_{3}$). As the number of the NiO$_{6}$ octahedra layers $n$ grows, the ratio of the kinetic energy determined from the experimental optical conductivity and that from band theory $K_{\text{exp}}/K_{\text{band}}$ increases, suggesting a reduction of electronic correlations. While the strong electronic correlations in the bilayer La$_{3}$Ni$_{2}$O$_{7}$ place it on the verge of the Mott insulating phase, the trilayer La$_{4}$Ni$_{3}$O$_{10}$ and infinite-layer LaNiO$_{3}$ exhibit moderate electronic correlations, falling into the regime of correlated metals. The evolution of the electronic correlations in La$_{n+1}$Ni$_{n}$O$_{3n+1}$ is likely to be dominated by the Ni-$d_{z^2}$ orbital. Our results provide important information for understanding the superconductivity in Ruddlesden-Popper nickelates. |
| title | Evolution of Electronic Correlations in the Ruddlesden-Popper Nickelates |
| topic | Superconductivity Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2411.08539 |