Anharmonic model for high-Tc superconductors
Abstract
A considerable ehancement of the superconducting transition temperature T(sub C) in perovskite-type oxides is explained in the framework of the anharmonic model for superconductors with structurally unstable lattices. It is shown that interaction of electrons with highly anharmonic oxygen-ion vibrations of a rotational type results in a sufficiently large coupling constant lambda. The obtained estimation for T(sub C) is in agreement with experimental data for La(Y)BaCuO systems.
- Publication:
-
Unknown
- Pub Date:
- 1987
- Bibcode:
- 1987amht.reptQ....P
- Keywords:
-
- Barium Compounds;
- Electron Phonon Interactions;
- High Temperature Superconductors;
- Lanthanum Compounds;
- Superconductivity;
- Yttrium Compounds;
- Fermi Surfaces;
- Green'S Functions;
- Isotope Effect;
- Mathematical Models;
- Perovskites;
- Transition Temperature;
- Solid-State Physics