Theory of neutron scattering, thermal conductivity, and photoemission for Cu-O plane superconductors

We calculate self-consistently the quasiparticle energy together with the RPA spin and charge susceptibilities for the 2D Hubbard model with additional electron-phonon interaction. In the normal state the spectral densities of the spin and charge susceptibilities scale with ω/T for small ω and saturate for ω > or approx. 4T. In the superconducting state these spectra acquire a gap. These results are in fair agreement with neutron scattering and thermal conductivity measurements on YBa2Cu3O7-δ. The calculated photoemission spectrum of the superconducting state exhibits a narrow quasiparticle peak and a pronounced minimum between this peak and the broad band at lower energies. This minimum decreases as the temperature is decreased with measurements on Bi2Sr2CaCu2O8. (orig.)