Fermi Arcs and Pseudogap in Cuprate Superconductors

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Abstract

Earlier, we have proposed [arXiv:1110.0227] the model of HTSC electronic structure modification under doping. In this model, doping by localized charges plays the key role, being responsible for local closing of the gap Δct between excitonic-like 3d10L− state of cation and electronic 3d9L state of anion and formation (at a certain dopant concentration) of the percolation cluster with the Fermi surface located in the cation-anion band of peculiar nature. This electronic structure is favorable for the formation of diatomic negative-U centers (NUCs) and realization of an unusual mechanism of electron–electron interaction. Here, the nature of normal state of cuprates as well as the mechanism of pseudogap and Fermi arcs formation are considered in the framework of this model by example YBCO.

Keywords

Percolation cluster Negative–U center Pseudogap Fermi arcs 
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Notes

Acknowledgements

The work was financed by the Ministry of Education and Science of the Russian Federation.

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Copyright information

© Springer Science+Business Media, LLC 2012

Authors and Affiliations

  1. 1.Lebedev Physical InstituteMoscowRussia

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