Inhomogeneity-induced enhancement of the pairing interaction in cuprates

Details Inhomogeneity-induced enhancement of the pairing interaction in cuprates Inhomogeneity-induced enhancement of the pairing interaction in cuprates

2007-03-22

arxiv.org/abs/cond-mat/0703566v1

Phys. Rev. Lett. 99, 147006 (2007)

Physics

Condensed Matter

Superconductivity

4 pages, 5 figures, revtex

Scientific paper

10.1103/PhysRevLett.99.147006

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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