Experimental and theoretical investigation of correlation effects in aggregates of Ni and Pd as a function of their size
B Bellamy; A Masson; V Degouveia; M C Desjonqueres; D Spanjaard; G Treglia; B Bellamy; Lab. de Physico-Chimie des Surfaces, Ecole Nat. Superieure de Chimie de Paris, France; A Masson; Lab. de Physico-Chimie des Surfaces, Ecole Nat. Superieure de Chimie de Paris, France; V Degouveia; Lab. de Physico-Chimie des Surfaces, Ecole Nat. Superieure de Chimie de Paris, France; M C Desjonqueres; Lab. de Physico-Chimie des Surfaces, Ecole Nat. Superieure de Chimie de Paris, France; D Spanjaard; Lab. de Physico-Chimie des Surfaces, Ecole Nat. Superieure de Chimie de Paris, France; G Treglia; Lab. de Physico-Chimie des Surfaces, Ecole Nat. Superieure de Chimie de Paris, France
Журнал:
Journal of Physics: Condensed Matter
Дата:
1989-08-28
Аннотация:
An experimental investigation of the UPS and Auger spectra of Ni and Pd aggregates on a SiO<sub>2</sub> substrate is presented. It shows that whereas the width of the UPS spectra increases for both metals when the crystallite size increases, the width of their Auger spectra increases for Pd and decreases for Ni. This was unexpected, since both types of spectra should broaden with the cluster size due to an increasing average coordination number. This surprising observation can be interpreted theoretically as being due to a monotonic change in electronic configuration between the atom and the solid modifying their Auger linewidth via electronic correlation effects.
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