Linear-response calculation of the electron-phonon coupling in doped CaCuO2.

Savrasov S.Y., Andersen O.K.

Using density-functional linear-response theory, we calculate the electron-phonon interaction for s- and d-wave pairing in the 0.24 hole doped infinite-layer compound CaCuO2. We find lambda (x2-y2) ~ 0.3 to be positive and only slightly smaller than lambda(s) ~ 0.4. This suggests that the electron-phonon mechanism alone is insufficient to explain the high Tc but could enhance another d-wave pairing mechanism. Results of calculated lattice dynamics and transport properties are also presented and discussed. Out-of-plane distortions are found essential for the stability.

Physical Review Letters, 77 4430-3, 1996.

Max-Planck Institut für Festkörperforschung;

Postfach 80 06 65   D-70506 Stuttgart

      to publication list

     to Activities 1995-2000