Electron-phonon interactions in the copper oxides: Implications for the resistivity

The effects of strong Coulomb correlations on the electron-phonon interaction are calculated using a frozen-phonon approach applied to the extended Hubbard, infinite-U Hamiltonian. As the insulator is approached the electron-phonon interaction becomes progressively weakened due to the inability to transfer charge. Both the magnitude and concentration x dependence of m*/n are consistent with experiment. While there are no clear experimental trends for variations of 1/ with x, the magntiude is in agreement with the data. That the calculated electron-phonon contribution to is nearly linear and found to account for most of the observed magnitude must be recognized in estimating the importance of other electronic or magnetic scattering contributions to the linear resistivity.