Berlin 2005 – wissenschaftliches Programm
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O: Oberflächenphysik
O 36: Postersitzung (Elektronische Struktur, Grenzfl
äche fest-flüssig, Halbleiteroberfl
ächen und -grenzfl
ächen, Nanostrukturen, Oberfl
ächenreaktionen, Teilchen und Cluster, Struktur und Dynamik reiner Oberfl
ächen)
O 36.12: Poster
Montag, 7. März 2005, 15:00–18:00, Poster TU F
Wave-vector dependent intensity variations of the Kondo peak in 4d → 4f resonant photoemission from CePd3 — •S. Danzenbächer1, Yu. Kucherenko2, M. Heber1, D.V. Vyalikh1, S.L. Molodtsov1, V.D.P. Servedio3, and C. Laubschat1 — 1Institut für Festkörperphysik, TU Dresden, D-01062 Dresden, Germany — 2Institute of Metal Physics, National Academy of Sciences of Ukraine, UA-03142 Kiev, Ukraine — 3Sezione INFM and Dip. di Fisica, Università “La Sapienza”, P.le A. Moro 2, 00185 Roma and Centro Studi e Ricerche e Museo della Fisica E. Fermi, Compendio Viminale, Roma, Italy
CePd3(111) films were prepared in UHV by co-adsorption of Pd and Ce on a W(110) surface. The films were characterized by means of LEED, angle-resolved photoemission (ARPES) and resonant ARPES. Strong angle-dependent intensity variations of the Fermi-level Ce-4f feature are observed in 4d → 4f resonant photoemission spectra of CePd3(111) that reveal the periodicity of the lattice and largest intensity close to the Γ points of the surface Brillouin zone. In the framework of a simplified periodic Anderson model the phenomena can 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.