title: Single-Ion Kondo scaling of the coherent Fermi liquid regime in Ce(1-x)La(x)Ni2Ge2.
abstract: Thermodynamic and transport properties of the La-diluted Kondo lattice CeNi(2)Ge(2) were studied in a wide temperature range. The Ce-rich alloys Ce(1-x)La(x)Ni(2)Ge(2) were found to exhibit distinct features of the coherent heavy Fermi liquid. At intermediate compositions (0.7≤x≤0.9), non-Fermi liquid properties have been observed, followed by the local Fermi liquid behavior in the dilute limit. The 4f-electron contribution to the specific heat was found to follow the predictions of the Kondo-impurity model in both the local as well as the coherent regimes, with the characteristic Kondo temperature decreasing rapidly from about 30 K for the parent compound CeNi(2)Ge(2) to about 1 K in the most dilute samples. The specific heat does not show any evidence for the emergence of a new characteristic energy scale related to the formation of the coherent Kondo lattice.
authors.affiliation: Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Wrocław, Poland.
authors.forename: Adam P
authors.initials: AP
authors.lastname: Pikul
authors.forename: Ulrike
authors.initials: U
authors.lastname: Stockert
authors.forename: Alexander
authors.initials: A
authors.lastname: Steppke
authors.forename: Tomasz
authors.initials: T
authors.lastname: Cichorek
authors.forename: Stefanie
authors.initials: S
authors.lastname: Hartmann
authors.forename: Nubia
authors.initials: N
authors.lastname: Caroca-Canales
authors.forename: Niels
authors.initials: N
authors.lastname: Oeschler
authors.forename: Manuel
authors.initials: M
authors.lastname: Brando
authors.forename: Christoph
authors.initials: C
authors.lastname: Geibel
authors.forename: Frank
authors.initials: F
authors.lastname: Steglich