Spin excitations in Nd1-xSrxNiO2 and YBa2Cu3 O7-δ: The influence of Hubbard U
Journal article, 2024
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.
Author
F. Rosa
Polytechnic University of Milan
L. Martinelli
Polytechnic University of Milan
G. Krieger
IPCMS Institut de Physique et Chimie des Materiaux de Strasbourg
Lucio Braicovich
European Synchrotron Radiation Facility (ESRF)
Nicholas B. Brookes
European Synchrotron Radiation Facility (ESRF)
Giacomo Merzoni
European XFEL
Polytechnic University of Milan
Marco Moretti Sala
Polytechnic University of Milan
F. Yakhou-Harris
European Synchrotron Radiation Facility (ESRF)
Riccardo Arpaia
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
Universita Ca' Foscari Venezia
D. Preziosi
IPCMS Institut de Physique et Chimie des Materiaux de Strasbourg
Marco Salluzzo
CNR - SuPerconducting and other INnovative materials and devices institute, Napoli
M. Fidrysiak
Jagiellonian University in Kraków
Giacomo Ghiringhelli
Polytechnic University of Milan
Physical Review B
2469-9950 (ISSN) 2469-9969 (eISSN)
Vol. 110 22 224431Resonant inelastic x-ray scattering to study changes in the HTS phase diagram induced by strain and confinement
Swedish Research Council (VR) (2020-04945), 2021-01-01 -- 2024-12-31.
Subject Categories (SSIF 2011)
Condensed Matter Physics
DOI
10.1103/PhysRevB.110.224431