Magnetic excitations in Nd$_{n+1}$Ni$_{n}$O$_{3n+1}$ Ruddlesden-Popper nickelates observed via resonant inelastic x-ray scattering
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2025
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| author | TenHuisen, Sophia F. R. Pan, Grace A. Song, Qi Baykusheva, Denitsa R. Segedin, Dan Ferenc Goodge, Berit H. Paik, Hanjong Pelliciari, Jonathan Bisogni, Valentina Gu, Yanhong Agrestini, Stefano Nag, Abhishek García-Fernández, Mirian Zhou, Ke-Jin Kourkoutis, Lena F. Brooks, Charles M. Mundy, Julia A. Dean, Mark P. M. Mitrano, Matteo |
| author_facet | TenHuisen, Sophia F. R. Pan, Grace A. Song, Qi Baykusheva, Denitsa R. Segedin, Dan Ferenc Goodge, Berit H. Paik, Hanjong Pelliciari, Jonathan Bisogni, Valentina Gu, Yanhong Agrestini, Stefano Nag, Abhishek García-Fernández, Mirian Zhou, Ke-Jin Kourkoutis, Lena F. Brooks, Charles M. Mundy, Julia A. Dean, Mark P. M. Mitrano, Matteo |
| contents | Magnetic interactions are thought to play a key role in the properties of many unconventional superconductors, including cuprates, iron pnictides, and square-planar nickelates. Superconductivity was also recently observed in the bilayer and trilayer Ruddlesden-Popper nickelates, whose electronic structure is expected to differ from that of cuprates and square-planar nickelates. Here we study how electronic structure and magnetic interactions evolve with the number of layers, $n$, in thin film Ruddlesden-Popper nickelates Nd$_{n+1}$Ni$_{n}$O$_{3n+1}$ with $n=1,\:3$, and 5 using resonant inelastic x-ray scattering (RIXS). The RIXS spectra are consistent with a high-spin $|3d^8 \underline{L} \rangle$ electronic configuration, resembling that of La$_{2-x}$Sr$_x$NiO$_4$ and the parent perovskite, NdNiO$_3$. The magnetic excitations soften to lower energy in the structurally self-doped, higher-$n$ films. Our observations confirm that structural tuning is an effective route for altering electronic properties, such as magnetic superexchange, in this prominent family of materials. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_07268 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Magnetic excitations in Nd$_{n+1}$Ni$_{n}$O$_{3n+1}$ Ruddlesden-Popper nickelates observed via resonant inelastic x-ray scattering TenHuisen, Sophia F. R. Pan, Grace A. Song, Qi Baykusheva, Denitsa R. Segedin, Dan Ferenc Goodge, Berit H. Paik, Hanjong Pelliciari, Jonathan Bisogni, Valentina Gu, Yanhong Agrestini, Stefano Nag, Abhishek García-Fernández, Mirian Zhou, Ke-Jin Kourkoutis, Lena F. Brooks, Charles M. Mundy, Julia A. Dean, Mark P. M. Mitrano, Matteo Strongly Correlated Electrons Materials Science Superconductivity Magnetic interactions are thought to play a key role in the properties of many unconventional superconductors, including cuprates, iron pnictides, and square-planar nickelates. Superconductivity was also recently observed in the bilayer and trilayer Ruddlesden-Popper nickelates, whose electronic structure is expected to differ from that of cuprates and square-planar nickelates. Here we study how electronic structure and magnetic interactions evolve with the number of layers, $n$, in thin film Ruddlesden-Popper nickelates Nd$_{n+1}$Ni$_{n}$O$_{3n+1}$ with $n=1,\:3$, and 5 using resonant inelastic x-ray scattering (RIXS). The RIXS spectra are consistent with a high-spin $|3d^8 \underline{L} \rangle$ electronic configuration, resembling that of La$_{2-x}$Sr$_x$NiO$_4$ and the parent perovskite, NdNiO$_3$. The magnetic excitations soften to lower energy in the structurally self-doped, higher-$n$ films. Our observations confirm that structural tuning is an effective route for altering electronic properties, such as magnetic superexchange, in this prominent family of materials. |
| title | Magnetic excitations in Nd$_{n+1}$Ni$_{n}$O$_{3n+1}$ Ruddlesden-Popper nickelates observed via resonant inelastic x-ray scattering |
| topic | Strongly Correlated Electrons Materials Science Superconductivity |
| url | https://arxiv.org/abs/2504.07268 |