A mechanism for the non-Fermi-liquid behavior in CeCu6-xAux
A. Rosch, A. Schröder, O. Stockert, H. v. Löhneysen
Abstract
We propose an explanation for the recently observed non-Fermi-liquid behavior of metallic alloys CeCu6-xAux: near x=0.1, the specific heat c is proportional to T (T0/T) and the resistivity increases linearly with temperature T over a wide range of T. These features follow from a model in which three-dimensional conduction electrons are coupled to two-dimensional critical ferromagnetic fluctuations near the quantum critical point, xc=0.1. This picture is motivated by the neutron scattering data in the ordered phase (x=0.2) and is consistent with the observed phase diagram.
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