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• W2111748257 abstract "Using a novel slave boson mapping, which was recently proposed by us for two Anderson impurities embedded in a metal, we present here spectral functions for all pseudoparticles involved in the mapping. These were numerically calculated in the framework of the Non-Crossing Approximation for different temperatures and inter-impurity distances, both for the degenerate (Nf = 6) and nondegenerate (Nf = 2) models. For the nondegenerate case, temperature dependencies of the partial occupancies and the spin-spin correlation function suggest that an antiferromagnetic (AFM)-like ground state is formed at suitable inter-impurity separation. By contrast, Kondo quenching of the impurity moments takes place for the isotropic Nf = 6 case even when a direct AFM interaction is introduced in order to amplify the indirect (inherent) one. Numerical calculations are in agreement with our previous prediction [Phys. Rev. B 47, 14,297 (1993)] that no AFM-like ground state can appear for two isotropic degenerate impurities." @default.
• W2111748257 created "2016-06-24" @default.
• W2111748257 creator A5001268465 @default.
• W2111748257 creator A5040418031 @default.
• W2111748257 date "2010-08-31" @default.
• W2111748257 modified "2023-09-26" @default.
• W2111748257 title "Two Anderson impurities in the framework of the non-crossing approximation: Spectral functions and spin correlations" @default.
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• W2111748257 doi "https://doi.org/10.1002/andp.2065080406" @default.
• W2111748257 hasPublicationYear "2010" @default.
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