Abstract
It is pointed out that Kondo-effect rare-earth compounds with insulating ground states must, except for a small probability, be mixed valent. The lack of low-energy magnetic correlations and the optical properties are discussed in a mixed-valent model. The curious properties of FeSi are also discussed.
- Received 11 August 1993
DOI:https://doi.org/10.1103/PhysRevB.50.9952
©1994 American Physical Society
