Spin excitations in Nd1-xSrxNiO2 and YBa2Cu3O7-$delta$: The influence of Hubbard U

@ARTICLE{Rosa2024,
  title={Spin excitations in Nd1-xSrxNiO2 and YBa2Cu3O7-$delta$: The influence of Hubbard U},
  author={Rosa, Francesco and Martinelli, Leonardo and Krieger, Guillaume and Braicovich, Lucio and Brookes, Nicholas B and Merzoni, Giacomo and Moretti Sala, Marco and Yakhou-Harris, Flora and Arpaia, Riccardo and Preziosi, Daniele and others},
  journal={Physical Review B},
  volume={110},
  number={22},
  pages={224431},
  year={2024},
  publisher={APS},
  doi={10.1103/PhysRevB.110.224431},
  url={https://journals.aps.org/prb/abstract/10.1103/PhysRevB.110.224431},
  abstract={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 midinfrared 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.}
  type = {Article},
  publication_stage = {Final}
}