Wave-vector dependent intensity variations of the Kondo peak in photoemission from CePd3 -: art. no. 033104

Strong angle-dependent intensity variations of the Fermi-level feature are observed in the 4d -> 4f resonant photoemission spectra of CePd3(111), that reveal the periodicity of the lattice and largest intensity close to the Gamma points of the surface Brillouin zone. In the framework of a simplified periodic Anderson model the phenomena may quantitatively be described by a wave-vector dependence of the electron hopping matrix elements caused by Fermi-level crossings of non-4f-derived energy bands.