Resonance photoemission for f-electron systems

Journal Article · Tue Dec 15 04:00:00 EST 1987 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.36.9488· OSTI ID:5530657

Gunnarsson, O; Li, T C

We develop a theory for resonance photoemission and apply it to Ce compounds and UO/sub 2/ described in a modified Anderson impurity model. For Ce (UO/sub 2/) the model takes into account decay processes involving two 4f (5f) electrons, one 4f (5f) electron, and a core electron. Starting from the quadratic response formalism, we derive general formulas for the photoemission spectrum as a function of photon energy. The 1/N/sub f/ expansion is then used to obtain explicit results for the Anderson model. All terms of order (1/N/sub f/)/sup 0/ and some terms of order (1/N/sub f/)/sup 1/ are included. The theory is used to explain the different photon-energy dependence for the two peaks in the Ce 4f valence and the UO/sub 2/ 4f core spectra. We find that interference between different intermediate configurations plays a crucial role.

• Research Organization: Max-Planck-Institut fuer Festkoerperforschung, D-7000 Stuttgart 80, West Germany
• OSTI ID: 5530657
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Journal Issue: 18 Vol. 36:18; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ACTINIDE COMPOUNDS
CERIUM COMPOUNDS
CHALCOGENIDES
EMISSION
ENERGY DEPENDENCE
ENERGY LEVELS
F STATES
FUNCTIONS
IMPURITIES
INTERFERENCE
OXIDES
OXYGEN COMPOUNDS
PHOTOEMISSION
RARE EARTH COMPOUNDS
RESONANCE
RESPONSE FUNCTIONS
SECONDARY EMISSION
URANIUM COMPOUNDS
URANIUM OXIDES