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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)
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.
0031-9007
087202-[4pp]
Montfrooij, W.
970851f8-7474-456c-a3bf-794da04c3ae2
Aronson, M.C.
5aa3c95b-2a54-46fb-a423-6a2f15c62ef0
Rainford, B.D.
a57f1153-bbba-49a3-bffc-0d96087156a0
Mydosh, J.A.
bb2fec63-5365-42f3-9a75-4487f02299d0
Murani, A.P.
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Haen, P.
8d5eeda2-ca63-4cbc-8bf0-221f80bb6f55
Fukuhara, T.
f40bee78-2af5-4eec-b28c-98949c699cdf
Montfrooij, W.
970851f8-7474-456c-a3bf-794da04c3ae2
Aronson, M.C.
5aa3c95b-2a54-46fb-a423-6a2f15c62ef0
Rainford, B.D.
a57f1153-bbba-49a3-bffc-0d96087156a0
Mydosh, J.A.
bb2fec63-5365-42f3-9a75-4487f02299d0
Murani, A.P.
1ecc684b-8aec-4c36-93cf-7a584ede1c0a
Haen, P.
8d5eeda2-ca63-4cbc-8bf0-221f80bb6f55
Fukuhara, T.
f40bee78-2af5-4eec-b28c-98949c699cdf

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), 087202-[4pp]. (doi:10.1103/PhysRevLett.91.087202).

Record type: Article

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

Identifiers

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: 19 Jul 2019 19:19

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