IndiumV3, France, Analysis, bibRecord, 000E64

New Spectroscopy Solves an Old Puzzle: The Kondo Scale in Heavy Fermions

Identifieur interne : 000E64 ( France/Analysis ); précédent : 000E63; suivant : 000E65

New Spectroscopy Solves an Old Puzzle: The Kondo Scale in Heavy Fermions

Auteurs : RBID : Pascal:02-0254953

Descripteurs français

Pascal (Inist)
- 7128, 7120E, 7870C, 7870D, Etude expérimentale, Etude théorique, Système fermions lourds, Composé valence mixte, Système électrons fortement corrélés, Effet Kondo, Structure électronique, Diffusion RX, Ytterbium composé, Indium composé, Cuivre composé.

English descriptors

KwdEn :
- Copper compounds, Electronic structure, Experimental study, Heavy fermion systems, Indium compounds, Kondo effect, Mixed-valence compounds, Strongly correlated electron systems, Theoretical study, X-ray scattering, Ytterbium compounds.

Abstract

Resonant inelastic x-ray scattering (RIXS) yields clear evidence of spectroscopic Kondo scales in heavy fermions. In YbInCu₄ and YbAgCu₄ RIXS probes the Yb²⁺ component of the hybrid ground state and the temperature dependence of the Yb 4f occupation. We report a sudden valence change at a phase transition in YbInCu₄ , but a continuous temperature dependence in YbAgCu₄ , consistent with the predictions of the Anderson impurity model, for a Kondo temperature T_K=70 K . These results solve a long-standing controversy and establish RIXS as a quantitative probe of the electronic structure of strongly correlated electron systems.

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Pascal:02-0254953

Le document en format XML

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<author><name sortKey="Dallera, C" uniqKey="Dallera C">C. Dallera</name>
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<author><name sortKey="Grioni, M" uniqKey="Grioni M">M. Grioni</name>
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<author><name sortKey="Shukla, A" uniqKey="Shukla A">A. Shukla</name>
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<author><name sortKey="Rueff, J P" uniqKey="Rueff J">J. P. Rueff</name>
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<author><name sortKey="Cox, D L" uniqKey="Cox D">D. L. Cox</name>
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<wicri:cityArea>Department of Physics, University of California, Davis</wicri:cityArea>
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<front><div type="abstract" xml:lang="en">Resonant inelastic x-ray scattering (RIXS) yields clear evidence of spectroscopic Kondo scales in heavy fermions. In YbInCu<sub>4</sub>
  and YbAgCu<sub>4</sub>
  RIXS probes the Yb<sup>2+</sup>
  component of the hybrid ground state and the temperature dependence of the Yb 4f  occupation. We report a sudden valence change at a phase transition in YbInCu<sub>4</sub>
 , but a continuous temperature dependence in YbAgCu<sub>4</sub>
 , consistent with the predictions of the Anderson impurity model, for a Kondo temperature T<sub>K</sub>
=70 K . These results solve a long-standing controversy and establish RIXS as a quantitative probe of the electronic structure of strongly correlated electron systems.</div>
</front>
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<fA14 i1="06"><s1>Department of Physics, University of California, Davis, California 95616</s1>
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  RIXS probes the Yb<sup>2+</sup>
  component of the hybrid ground state and the temperature dependence of the Yb 4f  occupation. We report a sudden valence change at a phase transition in YbInCu<sub>4</sub>
 , but a continuous temperature dependence in YbAgCu<sub>4</sub>
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New Spectroscopy Solves an Old Puzzle: The Kondo Scale in Heavy Fermions

New Spectroscopy Solves an Old Puzzle: The Kondo Scale in Heavy Fermions

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri