The Hopfield factor (electronic part of the electron-phonon coupling constant) is calculated in the Rigid-Muffin-Tin approximation (RMTA) for several perovskite high-Tc superconductors. Calculations were performed in the conventional "spherical" approximation, as well as taking into account proper local symmetry. It is shown that the layered perovskite crystal symmetry generally favors strong electron-phonon interaction on copper site. We also estimate some for non-RMTA effects.
|Number of pages||2|
|Journal||Physica C: Superconductivity and its Applications|
|Issue number||PART 2|
|Publication status||Published - 1 Dec 1989|
ASJC Scopus subject areas
- Condensed Matter Physics