engleski

Charge fluctuations in the copper-oxide planes and the electron-phonon couplings

Using the slave boson approach to treat the Ud → ∞ limit for the Coulomb repulsion on the copper site in the p-d model we give a short account on various charge fluctuation modes. The effect of the slave boson field adjustment on the strength and the Fermi surface effects for k=0 and k=(Pi, Pi)charge transfer modes is discussed. The implications for the screening of the corresponding electron-phonon couplings is also pointed out.

high Tc Superconductors ; strong correlations ; slave boson

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