Surface and bulk electronic structure of metallic cerium systems

✍ Scribed by G. Kaindl; E. Weschke; C. Laubschat; R. Ecker; A. Höhr

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 465 KB
• Volume: 186-188
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/0921-4526(93)90490-w

✦ Synopsis

High-resolution resonant photoemission (PE) studies of a-like metallic Ce systems reveal much less a-like character at the surface than in the bulk. For strongly hybridized Ce compounds like CeRh> the bulk 4f-PE spectra and, in particular, the Bremsstrahlung isochromate spectroscopy (BIS) spectra are found to be better described on the basis of 4f-and 5d-density of states from LDA band structure calculations than by a single impurity (SI) Anderson model. These results demonstrate a band-like character of the highly correlated 4f states in strongly a-like Ce systems and mark the limits of applicability of the SI model.