Kondo lattice and the formation of a heavy-fermion state

Journal Article · Fri Aug 01 04:00:00 EDT 1986 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.34.1918· OSTI ID:5644282

Tesanovic, Z; Valls, O T

We develop a new theoretical model for the Kondo lattice. We find that the Kondo lattice is qualitatively different from a collection of independent impurities: The ground state is characterized by coherence in the effective hybridization matrix. The low-temperature excitations are heavy fermions. The interactions between heavy fermions mediated by fluctuations around the mean-field solution are weak but can be long ranged in the Kondo regime. As a result, the Kondo lattice is prone to instabilities which we discuss in the context of recent experiments.

• Research Organization: School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455
• OSTI ID: 5644282
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 34:3; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

656000* -- Condensed Matter Physics
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COLLECTIVE EXCITATIONS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITATION
FLUCTUATIONS
GROUND STATES
HYBRIDIZATION
INSTABILITY
KONDO EFFECT
MATHEMATICAL MODELS
VARIATIONS