Superconducting Pairing Amplitude and Local Density of States in Presence of Repulsive Centers

Grzegorz Litak; Mariusz Krawiec

doi:10.1016/j.physb.2006.01.533

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Superconducting Pairing Amplitude and Local Density of States in Presence of Repulsive Centers

Grzegorz Litak·Mariusz Krawiec

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Abstract

We study the properties of superconductor in presence of a finite concentration of repulsive centers. The superconductor is described by the negative $U$ Hubbard model while repulsive centers are treated as randomly distributed impurities with repulsive interaction. Analyzing the paring potential and local density of states at impurity sites we find a wide range of the system parameters where the $π$ - like state could possibly be realized. Comparison of our results to the single repulsive center case is also given.

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Grzegorz Litak, Mariusz Krawiec. 2006-02-06. Superconducting Pairing Amplitude and Local Density of States in Presence of Repulsive Centers. https://doi.org/10.1016/j.physb.2006.01.533

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