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Quantum Critical Scaling and origin of Non-Fermi-Liquid behavior in Sc$_{1-x}$U$_{x}$Pd$_3$

Stephen D. Wilson·Pengcheng Dai·D. T. Adroja·S. -H. Lee·J. -H. Chung·J. W. Lynn·N. P. Butch·M. B. Maple
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Abstract

We use inelastic neutron scattering to study magnetic excitations of Sc$_{1-x}$U$_{x}$Pd$_3$ for U concentrations ($x=0.25$, 0.35) near the spin glass quantum critical point (QCP). The excitations are spatially incoherent, broad in energy ($E=\hbarω$), and follow $ω/T$ scaling at all wave vectors investigated. Since similar $ω/T$ scaling has been observed for UCu$_{5-x}$Pd$_x$ and CeCu$_{6-x}$Au$_{x}$ near the antiferromagnetic (AF) QCP, we argue that the observed non Fermi liquid (NFL) 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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Stephen D. Wilson, Pengcheng Dai, D. T. Adroja, S. -H. Lee, J. -H. Chung, J. W. Lynn, N. P. Butch, M. B. Maple. 2005-01-01. Quantum Critical Scaling and origin of Non-Fermi-Liquid behavior in Sc$_{1-x}$U$_{x}$Pd$_3$. https://doi.org/10.1103/physrevlett.94.056402

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