| Can Competition between the crystal field and the Kondo effect cause non-Fermi-liquid-like behavior? | |
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MedLine Citation:
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PMID: 16606205 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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The recently reported unusual behavior of the static and dynamical magnetic susceptibility as well as the specific heat in Ce(1-x)La(x)Ni9Ge4 has raised the question of a possible non-Fermi-liquid ground state in this material. We argue that for a consistent physical picture the crystal-field splitting of two low-lying magnetic doublets of the Ce 4f-shell must be taken into account. Furthermore, we show that for a splitting of the order of the low temperature scale T* of the system a crossover behavior between an SU(4) and an SU(2) Kondo effect is found. The screening of the two doublets occurs on different temperature scales leading to a different behavior of the magnetic susceptibility and the specific heat at low temperatures. The experimentally accessible temperature regime down to 50 mK still lies in the extended crossover regime into a strong-coupling Fermi-liquid fixed point. |
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Authors:
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Frithjof B Anders; Thomas Pruschke |
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Publication Detail:
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Type: Journal Article Date: 2006-03-01 |
Journal Detail:
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Title: Physical review letters Volume: 96 ISSN: 0031-9007 ISO Abbreviation: Phys. Rev. Lett. Publication Date: 2006 Mar |
Date Detail:
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Created Date: 2006-04-11 Completed Date: 2006-05-31 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0401141 Medline TA: Phys Rev Lett Country: United States |
Other Details:
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Languages: eng Pagination: 086404 Citation Subset: - |
Affiliation:
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Theoretical Physics, University of the Saarland, 66041 Saarbrücken, Germany. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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