The quadrupolar kondo effect: Lattice instability and large γ-values

The thermodynamic Bethe-ansatz equations of the two-channel spin- 1 2 Kondo problem (quadrupolar Kondo effect) are solved numerically and the entropy, specific heat, quadrupolar moment and the susceptibility are obtained as a function of the (quadrupolar) field and temperature. The impurity has a fi...

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Bibliographic Details
Published in:Physics letters. A 1989-12, Vol.142 (4), p.245-250
Main Authors: Sacramento, P.D., Schlottmann, P.
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Magnetic properties and materials
Magnetically ordered materials: other intrinsic properties
Physics
Valence fluctuation, kondo lattice, and heavy-fermion phenomena
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Summary:The thermodynamic Bethe-ansatz equations of the two-channel spin- 1 2 Kondo problem (quadrupolar Kondo effect) are solved numerically and the entropy, specific heat, quadrupolar moment and the susceptibility are obtained as a function of the (quadrupolar) field and temperature. The impurity has a finite entropy at T = 0 and for small fields the specific heat shows two peaks as a function of temperature.
ISSN:0375-9601
1873-2429
DOI:10.1016/0375-9601(89)90323-X