Electron-phonon interaction in the new superconductors La2-x(Ba,Sr)xCuO4
Abstract
A realistic tight-binding theory, based on the first-principles energy-band results of Mattheiss, is used to study the electron-phonon interaction in the new high-Tc superconductors La2-x(Ba,Sr)xCuO4. The calculated results include the phonon dispersion curves, phonon linewidths, the Eliashberg function α2(ω)F(ω), and the interaction constant λ. A very strong couplin of specific O phonons to the conduction electrons is found (λ>=2), leading-because of the light oxygen mass-to Tc values of ~30-40 K.
- Publication:
-
Physical Review Letters
- Pub Date:
- March 1987
- DOI:
- 10.1103/PhysRevLett.58.1371
- Bibcode:
- 1987PhRvL..58.1371W
- Keywords:
-
- Copper Oxides;
- Electron Phonon Interactions;
- Lanthanum Compounds;
- Transition Temperature;
- Conduction Electrons;
- High Temperature Superconductors;
- Magnetic Permeability;
- Oxygen Atoms;
- Solid-State Physics;
- 74.70.Ya;
- 63.20.Kr;
- 71.25.Pi;
- 71.38.+i;
- Phonon-electron and phonon-phonon interactions