Extended versus local fluctuations in quantum critical Ce(Ru1-xFex)2Ge2 (x = xc = 0.76)
Extended versus local fluctuations in quantum critical Ce(Ru1-xFex)2Ge2 (x = xc = 0.76)
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.
087202-[4pp]
Montfrooij, W.
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Aronson, M.C.
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Rainford, B.D.
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Mydosh, J.A.
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Murani, A.P.
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Haen, P.
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Fukuhara, T.
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19 August 2003
Montfrooij, W.
970851f8-7474-456c-a3bf-794da04c3ae2
Aronson, M.C.
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Rainford, B.D.
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Mydosh, J.A.
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Murani, A.P.
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Haen, P.
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Fukuhara, T.
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Montfrooij, W., Aronson, M.C., Rainford, B.D., Mydosh, J.A., Murani, A.P., Haen, P. and Fukuhara, T.
(2003)
Extended versus local fluctuations in quantum critical Ce(Ru1-xFex)2Ge2 (x = xc = 0.76).
Physical Review Letters, 91 (8), .
(doi:10.1103/PhysRevLett.91.087202).
Abstract
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.
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Published date: 19 August 2003
Organisations:
Quantum, Light & Matter Group
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Local EPrints ID: 14678
URI: http://eprints.soton.ac.uk/id/eprint/14678
ISSN: 0031-9007
PURE UUID: 3001dd82-8012-43ed-8328-bb6c227eecdb
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Date deposited: 18 Feb 2005
Last modified: 15 Mar 2024 05:29
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Author:
W. Montfrooij
Author:
M.C. Aronson
Author:
B.D. Rainford
Author:
J.A. Mydosh
Author:
A.P. Murani
Author:
P. Haen
Author:
T. Fukuhara
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