Quantum critical scaling and the origin of non-fermi-liquid behavior in Sc1-xUxPd3 |
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| Authors: | Wilson Stephen D Dai Pengcheng Adroja D T Lee S-H Chung J-H Lynn J W Butch N P Maple M B |
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| Institution: | Department of Physics and Astronomy, The University of Tennessee, Knoxville, Tennessee 37996-1200, USA. |
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| 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. |
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