title: Quantum critical scaling and the origin of non-fermi-liquid behavior in Sc1-xUxPd3.
abstract: We used inelastic neutron scattering to study magnetic excitations of Sc1-xUxPd3 for U concentrations (x=0.25, 0.35) near the spin glass quantum critical point (QCP). The excitations are spatially incoherent, broad in energy (E=variant Planck's over 2piomega), and follow omega/T scaling at all wave vectors investigated. Since similar omega/T scaling has been observed for UCu5-xPdx and CeCu6-xAux near the antiferromagnetic QCP, we argue that the observed non-Fermi-liquid behavior in these f-electron materials arises from the critical phenomena near a T=0 K phase transition, irrespective of the nature of the transition.
authors.affiliation: Department of Physics and Astronomy, The University of Tennessee, Knoxville, Tennessee 37996-1200, USA.
authors.forename: Stephen D
authors.initials: SD
authors.lastname: Wilson
authors.forename: Pengcheng
authors.initials: P
authors.lastname: Dai
authors.forename: D T
authors.initials: DT
authors.lastname: Adroja
authors.forename: S-H
authors.initials: SH
authors.lastname: Lee
authors.forename: J-H
authors.initials: JH
authors.lastname: Chung
authors.forename: J W
authors.initials: JW
authors.lastname: Lynn
authors.forename: N P
authors.initials: NP
authors.lastname: Butch
authors.forename: M B
authors.initials: MB
authors.lastname: Maple