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[17] Coherent Ladder Approximation for the Random Hubbard Model


Dynamical effects of the electron–electron interaction in binary alloys with off-diagonal disorder are described in a self-consistent theory obtained by unifying a local ladder approximation for the random Hubbard model and a modified CPA. Numerical results are presented for partially averaged densities of states, self-energies which fulfil the Luttinger theorem, and effective two-particle vertices. The totally averaged density of states exhibits tails with strongly damped correlation humps.

physica status solidi (b)/ Volume 81, Issue 2 / p.735-745
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Edeltraud Kolley
Prof. Dr. rer. nat. habil. Edeltraud Kolley