Numerical Renormalization Group Study of the O(3)-symmetric Anderson Model

Details Numerical Renormalization Group Study of the O(3)-symmetric Anderson Model Numerical Renormalization Group Study of the O(3)-symmetric Anderson Model

1997-01-21

arxiv.org/abs/cond-mat/9701152v1

Z. Phys.B 104 (1997) 333

Physics

Condensed Matter

Strongly Correlated Electrons

10 pages, LaTeX, 8 figures includes as eps-files

Scientific paper

10.1016/S0921-4526(96)00766-1

We use the numerical renormalization group method to study the O(3)-symmetric version of the impurity Anderson model of Coleman and Schofield. This model is of general interest because it displays both Fermi liquid and non-Fermi liquid behaviour, and in the large $U$ limit can be related to the compactified two channel Kondo model of Coleman, Ioffe and Tsvelik. We calculate the thermodynamics for a parameter range which covers the full range of behaviour of the model. We find a non-Fermi liquid fixed point in the isotropic case which is unstable with respect to channel anisotropy.

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