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Abstract The resonant level model equivalent to the Kondo problem is shown to be completely integrable, through the use of the Bethe hypothesis.
Abstract The equilibrium thermodynamics of the s-d exchange model has been investigated on the basis of the exact solution.
Abstract The tricritical behaviour of the isotropic-nematic phase transition is studied. The presence of two independent sixth-order terms in the free energy expansion breaks the conventional… (More)
Abstract The thermodynamics of the Anderson model describing the formation of localized magnetic moments in a metal is presented on the basis of the exact solution. In the symmetric case a… (More)