Inhomogeneity-induced enhancement of the pairing interaction in cuprates

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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.
4 pages, 5 figures, revtex

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Superconductivity, Strongly Correlated Electrons

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http://salesiana.dossiersoluciones.com/handle/123456789/140230

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0703566
 http://arxiv.org/abs/cond-mat/0703566
 Phys. Rev. Lett. 99, 147006 (2007)
 doi:10.1103/PhysRevLett.99.147006

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arXiv