Transition from heavy-fermion to mixed-valence behavior in ce1-xYxAl3: A quantitative comparison with the anderson impurity model

E. A. Goremychkin; R. Osborn; I. L. Sashin; P. Riseborough; B. D. Rainford; D. T. Adroja; J. M. Lawrence

doi:10.1103/PhysRevLett.104.176402

Transition from heavy-fermion to mixed-valence behavior in ce1-xYxAl3: A quantitative comparison with the anderson impurity model

E. A. Goremychkin, R. Osborn, I. L. Sashin, P. Riseborough, B. D. Rainford, D. T. Adroja, J. M. Lawrence

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

We present a neutron scattering investigation of Ce1-xYxAl3 as a function of chemical pressure, which induces a transition from heavy-fermion behavior in CeAl3 (TK=5K) to a mixed-valence state at x=0.5 (TK=150K). The crossover can be modeled accurately on an absolute intensity scale by an increase in the k-f hybridization, Vkf, within the Anderson impurity model. Surprisingly, the principal effect of the increasing Vkf is not to broaden the low-energy components of the dynamic magnetic susceptibility but to transfer spectral weight to high energy.

Original language	English
Article number	176402
Journal	Physical Review Letters
Volume	104
Issue number	17
DOIs	https://doi.org/10.1103/PhysRevLett.104.176402
Publication status	Published - 27 Apr 2010
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy

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10.1103/PhysRevLett.104.176402

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title = "Transition from heavy-fermion to mixed-valence behavior in ce1-xYxAl3: A quantitative comparison with the anderson impurity model",

abstract = "We present a neutron scattering investigation of Ce1-xYxAl3 as a function of chemical pressure, which induces a transition from heavy-fermion behavior in CeAl3 (TK=5K) to a mixed-valence state at x=0.5 (TK=150K). The crossover can be modeled accurately on an absolute intensity scale by an increase in the k-f hybridization, Vkf, within the Anderson impurity model. Surprisingly, the principal effect of the increasing Vkf is not to broaden the low-energy components of the dynamic magnetic susceptibility but to transfer spectral weight to high energy.",

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AU - Goremychkin, E. A.

AU - Osborn, R.

AU - Sashin, I. L.

AU - Riseborough, P.

AU - Rainford, B. D.

AU - Adroja, D. T.

AU - Lawrence, J. M.

PY - 2010/4/27

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AB - We present a neutron scattering investigation of Ce1-xYxAl3 as a function of chemical pressure, which induces a transition from heavy-fermion behavior in CeAl3 (TK=5K) to a mixed-valence state at x=0.5 (TK=150K). The crossover can be modeled accurately on an absolute intensity scale by an increase in the k-f hybridization, Vkf, within the Anderson impurity model. Surprisingly, the principal effect of the increasing Vkf is not to broaden the low-energy components of the dynamic magnetic susceptibility but to transfer spectral weight to high energy.

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Transition from heavy-fermion to mixed-valence behavior in ce1-xYxAl3: A quantitative comparison with the anderson impurity model

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