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T-Matrix Formulation of Impurity Scattering in Correlated Systems | | W. Ziegler
; D. Poilblanc
; R. Preuss
; W. Hanke
; D. J. Scalapino
; | | Date: |
17 Nov 1995 | | Subject: | cond-mat | | Abstract: | Using a generalized T-matrix description which, in principle, exactly includes Coulomb correlations and potential scattering events, resonant and bound impurity states are discussed. Like in the non-interacting case, the effects of the scattering potential can be divided into different partial wave channels, exploiting the symmetry of the underlying lattice. Due to Coulomb correlations bare local (i.e. s-wave) potentials become dynamic and extended, being responsible also for p-, d-wave etc. scattering effects. Numerically exact results for both the two-dimensional t--J and Hubbard models are used to construct a simple (static) approximation to the effective impurity potential which is shown to reproduce the exact resonant scattering and bound states in the relevant symmetry channels. | | Source: | arXiv, cond-mat/9511088 | | Other source: | [GID 938398] pmid9982384 | | Services: | Forum | Review | PDF | Favorites | |
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