https://doi.org/10.1007/s100510050118
Photoemission study of the epitaxial Ce/Pd(100) interface
1
Laboratoire de Physique des MatériauxUMR CNRS 7556, Université Henri Poincaré, BP 239,
54506 Vandœuvre-lès-Nancy Cedex, France
2
Laboratoire pour l'Utilisation du Rayonnement Electromagnétique, Université Paris-Sud,
BP 34, 91898 Orsay Cedex, France
Received:
9
July
1999
Published online: 15 March 2000
The electronic state of cerium has been investigated by
core-level and valence band photoemission spectroscopy in ultra-thin
films of a Ce-Pd monocrystalline compound obtained by epitaxial
growth. Careful characterization of the surface leads us to the
conclusion that the Ce configuration admixture is strongly reduced in
the surface layer. By evaporating one extra monolayer of Pd, we were
able to obtain core-level photoemission spectra without any surface
contribution and to evidence an exceptional configuration mixing for
the bulk ground state. The 4f spectral function obtained from
photoemission measurements at the 
threshold also exhibits a
very singular behavior and shed some new light on the description of
highly-hybridized 4f states in Ce compounds.
PACS: 71.28.+d – Narrow-band systems; intermediate-valence solids / 79.60.-i – Photoemission and photoelectron spectra
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2000
