Volume dependence of Anderson hybridization in cubic CeCd and CeAg

• Published in: Journal of applied physics Vol. 73; no. 10; pp. 6634 - 6636
• Main Authors: MONACHESI, P, ANDREANI, L. C, CONTINENZA, A, MCMAHAN, A. K
• Format: Conference Proceeding Journal Article
• Language: English
• Published: Woodbury, NY American Institute of Physics 15.05.1993
• Subjects: BINARY MIXTURES; CADMIUM COMPOUNDS; CERIUM COMPOUNDS; Condensed matter: electronic structure, electrical, magnetic, and optical properties; CRYSTAL FIELD; DISPERSIONS; Electron density of states and band structure of crystalline solids; Electron states; ELECTRONIC STRUCTURE; Exact sciences and technology; EXCHANGE INTERACTIONS; HYBRIDIZATION; INTERACTIONS; KONDO EFFECT; MATERIALS SCIENCE; MIXTURES; Other metals and alloys; Physics; PRESSURE EFFECTS; RARE EARTH COMPOUNDS; SILVER COMPOUNDS; Theories and models of many electron systems; TRANSITION ELEMENT COMPOUNDS 360104 > Metals & Alloys > Physical Properties; Cerium base alloys; Binary alloys; Cubic lattices; Crystal field splitting; Magnetic-phase transformations; Ab initio method; Theoretical study; Rare earth alloys; Anderson model; Hybridization; Coulomb interaction; Transition element alloys
• ISSN: 0021-8979; 1089-7550
• DOI: 10.1063/1.352537

We have undertaken a first-principles theoretical study of the Anderson hybridization in cubic CeCd and CeAg as a function of volume reduction. We present results for the hybridization width Δ(ε) in both the J=5/2 multiplet and in the Γ8, Γ7 crystal field states of the f1 Ce configuration. We also calculate the hybridization contribution to the magnetic transition temperature. This is found to increase with pressure but is smaller than the experimental values, indicating that the Coulomb exchange contribution to the magnetic coupling is not negligible in these compounds.