| DOI | Resolve DOI: https://doi.org/10.1103/PhysRevB.73.140401 |
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| Author | Search for: Montfrooij, W.; Search for: Aronson, M. C.; Search for: Rainford, B. D.; Search for: Mydosh, J. A.; Search for: Hendrikx, R.; Search for: Gortenmulder, T.; Search for: Murani, A. P.; Search for: Haen, P.; Search for: Swainson, I.1; Search for: de Visser, A. |
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| Affiliation | - National Research Council of Canada. NRC Steacie Institute for Molecular Sciences
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| Format | Text, Article |
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| Subject | cerium alloys; critical points; Fermi liquid; germanium alloys; heavy fermion systems; iron alloys; magnetic moments; neutron diffraction; ruthenium alloys; spin fluctuations |
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| Abstract | We present inelastic neutron scattering measurements on the intermetallic compounds Ce(Ru1–xFex)2Ge2 (x=0.65, 0.76, and 0.87). These compounds represent samples in a magnetically ordered phase, at a quantum critical point, and in the heavy-fermion phase, respectively. We show that at high temperatures the three compositions have the identical response of a local moment system. However, at low temperatures the spin fluctuations in the critical composition are given by non-Fermi-liquid dynamics, while the spin fluctuations in the heavy-fermion system show a simple exponential decay in time. In both compositions, the lifetime of the fluctuations is determined solely by the distance to the quantum critical point. We discuss the implications of these observations regarding the possible origins of non-Fermi-liquid behavior in this system. |
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| Publication date | 2006-04-04 |
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| Publisher | American Physical Society |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NPARC number | 12327094 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | ce1df2e1-a00e-464a-b449-d28617c8a05f |
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| Record created | 2009-09-10 |
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| Record modified | 2023-06-23 |
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