k- and spin-dependent hybridization effects in Ce monolayer

Here we present applications of the periodic Anderson model (PAM) to consideration of wave vector (k)- and spin-dependent hybridization effects in Ce metal. It was shown that k-dependent splitting of the 4f ionization peak of Ce/W(1 10) are correctly described in the framework of the PAM (Coulomb re...

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Bibliographic Details
Published in:Journal of physics. Conference series 2008-03, Vol.100 (7), p.072022
Main Authors: Dedkov, Y S, Vyalikh, D V, Fonin, M, Kucherenko, Y, Molodtsov, S L, Laubschat, C
Format: Article
Language:English
Subjects:
Brillouin zones
Hybridization
Monolayers
Occupancy
Photoelectric emission
Physics
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Summary:Here we present applications of the periodic Anderson model (PAM) to consideration of wave vector (k)- and spin-dependent hybridization effects in Ce metal. It was shown that k-dependent splitting of the 4f ionization peak of Ce/W(1 10) are correctly described in the framework of the PAM (Coulomb repulsion between two f electrons localized on the same lattice site Uff→ ). Our results show that the wave vector is conserved upon hybridization. In case of the magnetically ordered Ce monolayer, spin- and angle-resolved resonant photoemission spectra reveal spin-dependent changes of the Fermi-level peak intensities (which reflect the hybridization strength). That indicate a spin-dependence of 4f hybridization and, thus, of 4f occupancy and local moment. The phenomenon was also described in the framework of PAM by 4f electron hopping into the exchange split Fe 3d derived bands that form a spin-gap at the Fermi energy around the T point of the surface Brillouin zone.
ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/100/7/072022