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Extended versus local fluctuations in quantum critical Ce(Ru1-xFex)2Ge2 (x = xc = 0.76)

By W. Montfrooij, M.C. Aronson, B.D. Rainford, J.A. Mydosh, A.P. Murani, P. Haen and T. Fukuhara


We present inelastic neutron scattering experiments, performed near the antiferromagnetic quantum critical point in Ce(Ru0.24Fe0.76)2Ge2. 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 dynamic susceptibility, describing the non-Fermi liquid E=T scaling found at every q

Topics: QC
Year: 2003
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Provided by: e-Prints Soton
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