A. Continenza et al., ELECTRONIC-STRUCTURE AND YB-VALENCE IN THE KONDO LATTICES YBCU(4)M (M=AG, AU, PD, IN), Physica scripta. T, T66, 1996, pp. 177-182
Optical reflectivity measurements over a wide spectral range and at di
fferent temperatures together with self consistent electronic FLAPW ca
lculations within LDA have been used to investigate the electronic str
ucture of the compounds. A remarkable agreement between theory and exp
eriment has been found which allows for an interpretation of the origi
n of the different degree of f-d hybridization in these Yb-based mater
ials.