Theory of One-Channel versus Multichannel Kondo Effects for Ce{sup 3+} Impurities

Journal Article · Mon Aug 21 00:00:00 EDT 1995 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.75.1622· OSTI ID:116012

Kim, T; Cox, D L ^[1]

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1. Department of Physics, Ohio State University, Columbus, Ohio 43210 (United States)

We introduce a model for Ce{sup 3+} impurities in cubic metals which exhibits competition between the Fermi-liquid fixed point of the single-channel Kondo model and the non-Fermi-liquid fixed point of the two- and three-channel Kondo models. Using the noncrossing approximation and scaling theory, we find the following: (i) A possible three-channel Kondo effect between the one- and two-channel regimes in parameter space. (ii) The sign of the thermopower is a fixed point diagnostic. (iii) Our results will likely survive the introduction of additional {ital f}{sup 2} and conduction states. We apply this model to interpret the non-Fermi-liquid alloy La{sub 1{minus}{ital x}}Ce{sub {ital x}}Cu{sub 2.2}Si{sub 2}.

• OSTI ID: 116012
• Journal Information: Physical Review Letters, Vol. 75, Issue 8; Other Information: PBD: 21 Aug 1995
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COPPER ALLOYS
KONDO EFFECT
LANTHANUM ALLOYS
SILICON ALLOYS
CERIUM ADDITIONS
ELECTRONIC STRUCTURE
IMPURITIES
QUATERNARY ALLOY SYSTEMS
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES