Abstract
The electronic structure and the phonon modes of the superconducting cluster compounds La and Y are evaluated. They are used to calculate the Eliashberg function of both compounds within the rigid-muffin-tin approximation for electron-phonon coupling. The individual contributions from the different phonon branches are discussed. It turns out that nonlocal corrections to the electron-phonon coupling are essential for those modes where the octahedras move as a whole. Omission of these corrections leads to a large overestimate of and .
- Received 28 July 1981
DOI:https://doi.org/10.1103/PhysRevB.25.1589
©1982 American Physical Society