Dynamical mean field theory is used to solve the Falicov--Kimball model in the case where the f-ions have an internal structure. The solution provides a qualitative description of the properties of Eu-based intermetallic compounds which show anomalies due to a valence-change transition.
PACS numbers: 71.10.--w, 71.30.+h, 72.10.--d
| Table of Contents | Back to Number 22 contents |