title: Intersite coupling effects in a kondo lattice.
abstract: The La dilution of the Kondo lattice CeCoIn5 is studied. The scaling laws found for the magnetic susceptibility and the specific heat reveal two well-separated energy scales, corresponding to the single-impurity Kondo temperature T(K) and an intersite spin-liquid temperature T(*). The Ce-dilute alloy has the expected Fermi liquid ground state, while the specific heat and resistivity in the dense Kondo regime exhibit non-Fermi-liquid behavior, which scales with T(*). These observations indicate that the screening of the magnetic moments in the lattice involves antiferromagnetic intersite correlations with a larger energy scale in comparison with the Kondo impurity case.
authors.affiliation: National High Magnetic Field Laboratory (NHMFL), Florida State University, Tallahassee 32310, USA.
authors.forename: S
authors.initials: S
authors.lastname: Nakatsuji
authors.forename: S
authors.initials: S
authors.lastname: Yeo
authors.forename: L
authors.initials: L
authors.lastname: Balicas
authors.forename: Z
authors.initials: Z
authors.lastname: Fisk
authors.forename: P
authors.initials: P
authors.lastname: Schlottmann
authors.forename: P G
authors.initials: PG
authors.lastname: Pagliuso
authors.forename: N O
authors.initials: NO
authors.lastname: Moreno
authors.forename: J L
authors.initials: JL
authors.lastname: Sarrao
authors.forename: J D
authors.initials: JD
authors.lastname: Thompson