Solution of the Two-Channel Anderson Impurity Model - Implications for the Heavy Fermion UBe$_{13}$ -

Details Solution of the Two-Channel Anderson Impurity Model - Implications for the Heavy Fermion UBe$_{13}$ - Solution of the Two-Channel Anderson Impurity Model - Implications for the Heavy Fermion UBe$_{13}$ -

2002-04-18

arxiv.org/abs/cond-mat/0204392v1

Phys. Rev. Lett. 88, 237206 (2002)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 2 figures, (to be published in PRL)

Scientific paper

10.1103/PhysRevLett.88.237206

We solve the two-channel Anderson impurity model using the Bethe-Ansatz. We determine the ground state and derive the thermodynamics, obtaining the impurity entropy and specific heat over the full range of temperature. We show that the low temperature physics is given by a line of fixed points decribing a two-channel non Fermi liquid behavior in the integral valence regime associated with moment formation as well as in the mixed valence regime where no moment forms. We discuss relevance for the theory of UBe$_{13}$.

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