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| Autores principales: | , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| Materias: | |
| Acceso en línea: | https://arxiv.org/abs/2507.03277 |
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| _version_ | 1866915727459483648 |
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| author | Wang, Han-Yu Tang, Shu-Hong Huang, Xiao-Teng Quan, Ya-Min Wang, XianLong Li, Yan-Ling Liu, Da-Yong Lin, H. -Q. Zeng, Zhi Zou, Liang-Jian |
| author_facet | Wang, Han-Yu Tang, Shu-Hong Huang, Xiao-Teng Quan, Ya-Min Wang, XianLong Li, Yan-Ling Liu, Da-Yong Lin, H. -Q. Zeng, Zhi Zou, Liang-Jian |
| contents | The discovery of superconductivity in multilayer nickelates under pressure has intensified interest in understanding the magnetic and electronic properties of Ruddlesden-Popper nickelates. Using density functional theory with Hubbard corrections, we investigate the magnetic ground state, electronic structure evolution under pressure, and Sr-doping effects in La$_2$NiO$_4$. We find that at ambient pressure, tetragonal La$_2$NiO$_4$ exhibits G-type antiferromagnetic order with negligible interlayer magnetic coupling. Under hydrostatic pressure, the system undergoes a continuous insulator-metal transition at ~50 GPa while maintaining robust magnetic order up to 75 GPa, contrasting sharply with the rapid magnetic suppression in La$_3$Ni$_2$O$_7$. Sr doping induces a systematic evolution from G-type to A-type, to striped antiferromagnetic orders, and eventually to ferromagnetic order, accompanied by metallization. Furthermore, LaSrNiO$_4$ displays weak charge and orbital orders. These results reveal the unique pressure and doping effects of single-layer nickelates and provide insights into the magnetic mechanisms underlying nickelate superconductivity. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_03277 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Pressure and doping control of magnetic order and metallization in Ruddlesden-Popper La2NiO4 Wang, Han-Yu Tang, Shu-Hong Huang, Xiao-Teng Quan, Ya-Min Wang, XianLong Li, Yan-Ling Liu, Da-Yong Lin, H. -Q. Zeng, Zhi Zou, Liang-Jian Superconductivity Strongly Correlated Electrons The discovery of superconductivity in multilayer nickelates under pressure has intensified interest in understanding the magnetic and electronic properties of Ruddlesden-Popper nickelates. Using density functional theory with Hubbard corrections, we investigate the magnetic ground state, electronic structure evolution under pressure, and Sr-doping effects in La$_2$NiO$_4$. We find that at ambient pressure, tetragonal La$_2$NiO$_4$ exhibits G-type antiferromagnetic order with negligible interlayer magnetic coupling. Under hydrostatic pressure, the system undergoes a continuous insulator-metal transition at ~50 GPa while maintaining robust magnetic order up to 75 GPa, contrasting sharply with the rapid magnetic suppression in La$_3$Ni$_2$O$_7$. Sr doping induces a systematic evolution from G-type to A-type, to striped antiferromagnetic orders, and eventually to ferromagnetic order, accompanied by metallization. Furthermore, LaSrNiO$_4$ displays weak charge and orbital orders. These results reveal the unique pressure and doping effects of single-layer nickelates and provide insights into the magnetic mechanisms underlying nickelate superconductivity. |
| title | Pressure and doping control of magnetic order and metallization in Ruddlesden-Popper La2NiO4 |
| topic | Superconductivity Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2507.03277 |