Quantum critical scaling and the origin of non-fermi-liquid behavior in Sc1-xUxPd3.
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.
Wilson
Stephen D
SD
Department of Physics and Astronomy, The University of Tennessee, Knoxville, Tennessee 37996-1200, USA.
Dai
Pengcheng
P
Adroja
D T
DT
Lee
S-H
SH
Chung
J-H
JH
Lynn
J W
JW
Butch
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NP
Maple
M B
MB