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VOLUME 29 (1979) | ISSUE 11 | PAGE 661
High-temperature superconducting phase in rare-earth metal compounds
The microscopic mechanism for the occurrence of a high-temperature superconducting phase in rare-earth metal compounds based on the effect of exchange amplification of electron-phonon interaction is considered. A universal symmetry of the magnetic elementary cell—which determines the Fermi surface topology—is found, which provides an effective electron-phonon interaction in the case of the phase transition of the first kind from the paramagnetic phase into the superconducting state. Methods of producing such a symmetry in rare-earth metals and their compounds are proposed.