Renormalized mean-field theory of neutron scattering in cuprate superconductors
Renormalized mean-field theory of neutron scattering in cuprate superconductors
The magnetic excitation spectrum of the $t\ensuremath{-}{t}^{\ensuremath{'}}\ensuremath{-}J$ model is studied in mean-field theory and compared to inelastic neutron-scattering (INS) experiments on ${\mathrm{YBa}}_{2}{\mathrm{Cu}}_{3}{\mathrm{O}}_{6+y}$ (YBCO) and ${\mathrm{Bi}}_{2}{\mathrm{Sr}}_{2}{\mathrm{CaCu}}_{2}{\mathrm{O}}_{8+\ensuremath{\delta}}$ (BSCCO) superconductors. Within the slave-particle formulation the dynamical spin response is calculated from a renormalized Fermi liquid with an effective interaction $\ensuremath{\sim}J$ in the magnetic …