most citedQualitative breakdown of the non-crossing approximation for the symmetric one-channel Anderson impurity model at all temperatures

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cond-mat.str-el2016★ 14 cited

Qualitative breakdown of the non-crossing approximation for the symmetric one-channel Anderson impurity model at all temperatures

C. N. Sposetti, L. O. Manuel, P. Roura-Bas

The Anderson impurity model is studied by means of the self-consistent hybridization expansions in its non-crossing (NCA) and one-crossing (OCA) approximations. We have found that…