Abstract
Abstract Ferroelectrics and high-temperature superconductors have a variety of features in common which suggest similar mechanisms to be responsible for their occurrence. Ferroelectricity has been shown to be due to an onsite anharmonic electron-phonon interaction. In conventional superconductors, an attractive electron-phonon interaction compensates the Coulomb repulsion, thus leading to the paired electron state. For high-temperature superconductors it will be shown that again a mechanism based on electron-phonon interactions can lead to strong increases in the superconducting transition temperature Tc, depress the isotope effect and vary the gap to Tc ratio. In spite of the close relationship between ferroelectrics and oxide superconductors, it is concluded that both phenomena are mutually exclusive.
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