Spin excitations in Nd1-xSrxNiO2 and YBa2Cu3O7-delta: the influence of Hubbard U
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arXiv
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| Autores principales: | , , , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866914833719361536 |
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| author | Rosa, Francesco Martinelli, Leonardo Krieger, Guillaume Braicovich, Lucio Brookes, Nicholas B. Merzoni, Giacomo Sala, Marco Moretti Yakhou-Harris, Flora Arpaia, Riccardo Preziosi, Daniele Salluzzo, Marco Fidrysiak, Maciej Ghiringhelli, Giacomo |
| author_facet | Rosa, Francesco Martinelli, Leonardo Krieger, Guillaume Braicovich, Lucio Brookes, Nicholas B. Merzoni, Giacomo Sala, Marco Moretti Yakhou-Harris, Flora Arpaia, Riccardo Preziosi, Daniele Salluzzo, Marco Fidrysiak, Maciej Ghiringhelli, Giacomo |
| contents | We use Resonant Inelastic X-ray Scattering (RIXS) to compare the doping dependence of magnetic excitations of an Infinite-Layer nickelate to those of a prototypical superconducting cuprate. The polarization analysis of RIXS spectra establishes the dominant spin-flip nature of the mid-infrared peak in both cases. Hole doping leads to opposite behavior of the magnetic energy in the two materials. By fitting the data with an original Hubbard-based model for dynamic susceptibility, we find that t is comparable in the two materials while U is about twice larger in the nickelate. This finding accounts for the smaller magnetic bandwidth of nickelates and for its decrease upon doping. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_09271 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Spin excitations in Nd1-xSrxNiO2 and YBa2Cu3O7-delta: the influence of Hubbard U Rosa, Francesco Martinelli, Leonardo Krieger, Guillaume Braicovich, Lucio Brookes, Nicholas B. Merzoni, Giacomo Sala, Marco Moretti Yakhou-Harris, Flora Arpaia, Riccardo Preziosi, Daniele Salluzzo, Marco Fidrysiak, Maciej Ghiringhelli, Giacomo Strongly Correlated Electrons Quantum Physics We use Resonant Inelastic X-ray Scattering (RIXS) to compare the doping dependence of magnetic excitations of an Infinite-Layer nickelate to those of a prototypical superconducting cuprate. The polarization analysis of RIXS spectra establishes the dominant spin-flip nature of the mid-infrared peak in both cases. Hole doping leads to opposite behavior of the magnetic energy in the two materials. By fitting the data with an original Hubbard-based model for dynamic susceptibility, we find that t is comparable in the two materials while U is about twice larger in the nickelate. This finding accounts for the smaller magnetic bandwidth of nickelates and for its decrease upon doping. |
| title | Spin excitations in Nd1-xSrxNiO2 and YBa2Cu3O7-delta: the influence of Hubbard U |
| topic | Strongly Correlated Electrons Quantum Physics |
| url | https://arxiv.org/abs/2406.09271 |