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Evidence for a common physical description of non-Fermi-liquid behavior in f-electron systems

M. C. de Andrade·R. Chau·R. P. Dickey·N. R. Dilley·E. J. Freeman·D. A. Gajewski·M. B. Maple·R. Movshovich·A. H. Castro Neto·G. E. Castilla·B. A. Jones
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Abstract

The non-Fermi-liquid (NFL) behavior observed in the low temperature specific heat $C(T)$ and magnetic susceptibility $χ(T)$ of f-electron systems is analyzed within the context of a recently developed theory based on Griffiths singularities. Measurements of $C(T)$ and $χ(T)$ in the systems $Th_{1-x}U_{x}Pd_{2}Al_{3}$, $Y_{1-x}U_{x}Pd_3$, and $UCu_{5-x}M_{x}$ (M = Pd, Pt) are found to be consistent with $C(T)/T \propto χ(T) \propto T^{-1+λ}$ predicted by this model with $λ<1$ in the NFL regime. These results suggest that the NFL properties observed in a wide variety of f-electron systems can be described within the context of a common physical picture.

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M. C. de Andrade, R. Chau, R. P. Dickey, N. R. Dilley, E. J. Freeman, D. A. Gajewski, M. B. Maple, R. Movshovich, A. H. Castro Neto, G. E. Castilla, B. A. Jones. 1998-02-08. Evidence for a common physical description of non-Fermi-liquid behavior in f-electron systems. https://doi.org/10.1103/physrevlett.81.5620

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