2013/08/31 by C. J. Jia, Chunjing Jia, Elizabeth Nowadnick +14 · 1 citation
Physics and Astronomy · #Advanced Condensed Matter Physics #Condensed matter physics #Cuprate #Doping #Inelastic neutron scattering #Inelastic scattering #Magnetic properties of thin films #Pairing #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Quasiparticle #Resonant inelastic X-ray scattering #Scattering #Spin (aerodynamics) #Superconductivity #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1038/ncomms4314
published as Nature Communications 5, 3314 (2014) · main text with 4 figures; supplementary material with 7 figures
openalex publication_date 2014/02/28 · arxiv created 2015/02/26 · arxiv updated 2015/02/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
How coherent quasiparticles emerge by doping quantum antiferromagnets is a key question in correlated electron systems, whose resolution is needed to elucidate the phase diagram of copper oxides. Recent resonant inelastic X-ray scattering (RIXS) experiments in hole-doped cuprates have purported to measure high-energy collective spin excitations that persist well into the overdoped regime and bear a striking resemblance to those found in the parent compound, challenging the perception that spin excitations should weaken with doping and have a diminishing effect on superconductivity. Here we show that RIXS at the Cu L3-edge indeed provides access to the spin dynamical structure factor once one considers the full influence of light polarization. Further we demonstrate that high-energy spin excitations do not correlate with the doping dependence of Tc, while low-energy excitations depend sensitively on doping and show ferromagnetic correlations. This suggests that high-energy spin excitations are marginal to pairing in cuprate superconductors.