Characterization of the hybridized 4f states in YbAl/sub 3/ by high-energy spectroscopies

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

DOI:https://doi.org/10.1103/PhysRevB.36.7697· OSTI ID:5575509

Patthey, F; Imer, J; Schneider, W; Baer, Y; Delley, B; Hulliger, F

The intermetallic compound YbAl/sub 3/ has been studied by bremsstrahlung isochromat spectroscopy, x-ray photoemission, and high-resolution (<20 meV) uv photoemission using He I and He II lines. The spectra analysis with the Anderson single-impurity model for T = 0 reveals a ground state with an important hybridization of f state with band states, corresponding to an f population n/sub f/ = 13.5. In contrast to all investigated metallic Ce systems which are in the Kondo regime, YbAl/sub 3/ is found to be in the mixed-valence regime. A rough calculation provides an explanation for the comparable hybridization strengths observed in Ce and Yb systems.

• Research Organization: Institut de Physique, Universite de Neuchtel, CH-2000 Neuchtel, Switzerland
• OSTI ID: 5575509
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 36:14; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals &amp; Alloys-- Physical Properties
ALLOYS
ALUMINIUM ALLOYS
EMISSION
HYBRIDIZATION
INTERMETALLIC COMPOUNDS
PHOTOEMISSION
RARE EARTH ALLOYS
SECONDARY EMISSION
YTTERBIUM ALLOYS