Abstract
Abstract After solving the single Anderson impurity model (SIAM) within the non-crossing approximation with a finite Coulomb repulsion, U , and vertex corrections ( NCA f 2 v ), we focus on the magnetic susceptibility. Using the same diagrammatic expansion the susceptibility can be dressed with two factors, namely, the double state occupancy and the vertex corrections. In this work we analyse the effect of double occupancy on the dynamic and static susceptibility as a function of U and on the degeneracy of the total impurity angular moment, S .
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