title: Extended versus local fluctuations in quantum critical Ce(Ru1-xFex)2Ge2 (x=xc=0.76).
abstract: We present inelastic neutron scattering experiments, performed near the antiferromagnetic quantum critical point in Ce(Ru0.24Fe0.76)2Ge2. Both local and long-range fluctuations of the local moments are observed, but due to the Kondo effect only the latter are critical. We propose a phenomenological expression which fits the energy E, temperature T, and wave vector q dependences of the dynamic susceptibility, describing the non-Fermi liquid E/T scaling found at every q.
authors.affiliation: University of Michigan, Ann Arbor, MI 48109, USA.
authors.forename: W
authors.initials: W
authors.lastname: Montfrooij
authors.forename: M C
authors.initials: MC
authors.lastname: Aronson
authors.forename: B D
authors.initials: BD
authors.lastname: Rainford
authors.forename: J A
authors.initials: JA
authors.lastname: Mydosh
authors.forename: A P
authors.initials: AP
authors.lastname: Murani
authors.forename: P
authors.initials: P
authors.lastname: Haen
authors.forename: T
authors.initials: T
authors.lastname: Fukuhara