Spin excitations in Nd1-xSrxNiO2 and YBa2Cu3 O7-δ: The influence of Hubbard U
Artikel i vetenskaplig tidskrift, 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.
Författare
F. Rosa
Politecnico di Milano
L. Martinelli
Politecnico di Milano
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
Politecnico di Milano
Marco Moretti Sala
Politecnico di Milano
F. Yakhou-Harris
European Synchrotron Radiation Facility (ESRF)
Riccardo Arpaia
Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik
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
Uniwersytet Jagiellonski w Krakowie
Giacomo Ghiringhelli
Politecnico di Milano
Physical Review B
2469-9950 (ISSN) 2469-9969 (eISSN)
Vol. 110 22 224431Resonant inelastisk röntgenspridning för att studera förändringar i högtemperatursupraledares fasdiagram orsakade av mekanisk påfrestning och inneslutning
Vetenskapsrådet (VR) (2020-04945), 2021-01-01 -- 2024-12-31.
Ämneskategorier (SSIF 2011)
Den kondenserade materiens fysik
DOI
10.1103/PhysRevB.110.224431