J. Phys. IV France 04 (1994) C9-127-C9-130
Core-level XPS spectra of supported 3d-metal ultrathin layers : experimental and theoretical studiesG. Garreau1, V. Schorsch1, E. Beaurepaire1, J.C. Parlebas1, O. Speder2 and P. Rennert2
1 IPCMS-GEMME, UM 46 du CNRS, 23 rue du Loess, BP. 20 CR, 67037 Strasbourg, France
2 Dept. of Physics, Martin Luther Univ., Friedeman Bach Pl. 6, 06099 Halle, Germany
In order to discuss the relation between the core level c-XPS spectra and the local electronic and magnetic properties of supported 3d transition metal atoms, we incorporate the various Coulomb and exchange interactions into a generalized impurity Anderson Hamiltonian, both in the initial state (Udd, Jdd) and final state (Udc, Jdc) of the c-XPS process. Then we discuss recent experimental 3s-XPS spectra of Fe and Co ultrathin-layers upon Cr(100) as well as V clusters upon graphite in terms of the two limits of the preceding Hamiltonian : (1) the exchange splitting limit (Jdc) and (2) the dielectric relaxation limit (Udc).
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