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Inhomogeneity-induced enhancement of the pairing interaction in cuprates

Maciej M. Maska·Zaneta Sledz·Katarzyna Czajka·Marcin Mierzejewski
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Abstract

Scanning tunneling spectroscopy has recently discovered a positive correlation between the magnitude of the superconducting gap and positions of dopant oxygen atoms in Bi-based cuprates. We propose a microscopic mechanism that could be responsible for this effect. In particular, we demonstrate that the dopant-induced spatial variation of the atomic levels always enhances the superexchange interaction.

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Maciej M. Maska, Zaneta Sledz, Katarzyna Czajka, Marcin Mierzejewski. 2007-03-22. Inhomogeneity-induced enhancement of the pairing interaction in cuprates. https://doi.org/10.1103/physrevlett.99.147006

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