non-Local Quantum Criticality in Ce(Ru1-x Fex)2 Ge2 (x = xc = 0.76)
Abstract
We present the results of inelastic neutron scattering measurements, performed near the antiferromagnetic quantum critical point in Ce(Ru0.24 Fe0.76)2 Ge2. Both local and long range fluctuations of the local moments are observed, but due to the Kondo effect only the latter are critical. We propose a phenomenological expression which fits the energy E, temperature T and wave vector q dependences of the generalized susceptibility chi(q,E,T), describing the non-Fermi liquid E/T scaling found at every wave vector.
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