A simple theory of the Kondo hole

Journal Article · Mon Apr 15 04:00:00 EDT 1991 · Journal of Applied Physics; (USA)

DOI:https://doi.org/10.1063/1.347971· OSTI ID:5794443

Sollie, R; Schlottmann, P ^[1]

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1. Department of Physics, Temple University, Philadelphia, Pennsylvania 19122 (US) Department of Physics, Florida State University, Tallahassee, Florida 32306

The Kondo hole is an isolated nonmagnetic impurity in a heavy-fermion lattice. Experimentally, the Kondo hole can be realized by La or Th atoms replacing a Ce ion in a stoichiometric Ce compound or by Th impurities in a U--heavy-fermion system. Adding impurities to a Kondo lattice gradually destroys the coherence of the heavy-fermion ground state. Perturbations of the coherent state are conveniently studied in the {ital f}-electron density of states. We consider a dispersionless orbitally nondegenerate {ital f} band locally hybridized with one nearest-neighbor hopping tight-binding conduction band on a simple cubic lattice. A hybridization gap opens in the symmetric case, and the Kondo hole introduces a bound state in the gap. We study the effects of the scattering on the local density of {ital f} states in the neighborhood of the nonmagnetic impurity. The effects of the correlations within the {ital f} band are introduced via a self-energy, evaluated to second-order perturbation in U, using the {ital d}={infinity} treatment of Schweitzer and Czycholl (Solid State Commun. {bold 74}, 735 (1990)).

• DOE Contract Number: FG02-87ER45333
• OSTI ID: 5794443
• Journal Information: Journal of Applied Physics; (USA), Journal Name: Journal of Applied Physics; (USA) Vol. 69:8; ISSN 0021-8979; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

657002* -- Theoretical & Mathematical Physics-- Classical & Quantum Mechanics
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANTIFERROMAGNETIC MATERIALS
COULOMB FIELD
ELECTRIC FIELDS
HOLES
KONDO EFFECT
MAGNETIC MATERIALS
MATERIALS
STOICHIOMETRY