2 00 1 Direct experimental verification of applicability of single - site model for angle integrated photoemission of small T K concentrated Ce compounds
نویسنده
چکیده
Bulk-sensitive high-resolution Ce 4f spectra have been obtained from 3d→4f resonance photoemission measurements on La1−xCexAl2 and La1−xCexRu2 for x = 0.0, 0.04, 1.0. The 4f spectra of low-Kondo-temperature (TK) (La,Ce)Al2 are essentially identical except for a slight increase of the Kondo peak with x, which is consistent with a known increase of TK with x. In contrast, the 4f spectra of highTK (La,Ce)Ru2 show a Kondo-like peak and also a 0.5 eV structure which increases strongly with x. The resonance photon-energy dependences of the two contributions are different and the origin of the 0.5 eV structure is still uncertain.
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