2010/06/07 by Zlatko Koinov, Z. G. Koinov, Koinov, Z. G. +3
Physics and Astronomy · #FOS: Physical sciences #Physics of Superconductivity and Magnetism #Quantum Chromodynamics and Particle Interactions #Quantum, superfluid, helium dynamics #Superconductivity (cond-mat.supr-con) #cond-mat.supr-con
paper · pdf · doi:10.48550/arxiv.1006.1388
arxiv created 2010/06/07 · openalex publication_date 2010/06/07 · arxiv updated 2010/06/09 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
The Bethe-Salpeter equations for the collective modes of a t-U-V-J model are used to analyze the resonance peak observed at \bfQ=(π,π) in neutron scattering experiments on the cuprates. We assume that the resonance emerges due to the mixing between the spin channel and 19 other channels. We have calculated the energy of the lowest mode of the extended Hubbard model (J=0) vs the on-site repulsive interaction U, as well as the UJ lines in the interaction parameter space which are consistent with the ARPES data and reproduces the resonance peak at 40 meV in Bi2212 compound. We find that the resonance is predominantly a spin exciton.