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Quantum Interference Phenomena Between Impurity States in d-wave Superconductors

U. Michelucci, F. Venturini, A. P. Kampf

cond-mat.supr-conarXiv:cond-mat/0107621

Abstract

We investigate the mutual influence of impurities in two-dimensional d-wave superconductors involving self-consistent solutions of the Bogoliubov-de Gennes equations. The local order parameter suppression, the local density of states (LDOS) as well as the interference of impurity-induced structures are analyzed. We employ an impurity position averaging scheme for the DOS that does not neglect these interference effects, as the commonly used T-matrix approaches do.

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