Abstract
We have studied the electronic structure of the superconducting fullerides and using the local-density approximation in the density functional theory. Their conduction-band profiles are found to be quantitatively very similar to each other although the lattice constant of is definitely smaller than that of The density of states at Fermi level of is slightly larger than that of In addition, states are found to be hybridized not only with Ba states but also with K (Rb) states. These results are in sharp contrast to superconductors and Rb). The hybridization is expected to play an important role in their superconducting properties since carriers are found to be not only on but also around K (Rb) sites as well as Ba sites.
- Received 11 May 1999
DOI:https://doi.org/10.1103/PhysRevB.60.16186
©1999 American Physical Society