Phonon and Magnetic Pairing Mechanisms in High-Temperature Superconductors in the Strong Correlation Mode

E. I. Shneyder; S. G. Ovchinnikov

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arXiv · 0705.1402

Phonon and Magnetic Pairing Mechanisms in High-Temperature Superconductors in the Strong Correlation Mode

E. I. Shneyder·S. G. Ovchinnikov

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Abstract

The t-t'-t''-J model of electrons interacting with three phonon modes (breathing, apical breathing, and buckling) is considered. The wave-vector dependence of the matrix elements of the electron-phonon interaction leads to opposite contributions to the pairing potential with the d-symmetry: the buckling mode facilitates electron pairing, while the breathing mode suppresses it. As a result, the critical temperature of La{2 - x}Sr{x}CuO{4} that is associated with the magnetic mechanism is lowered when phonons are taken into account.

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E. I. Shneyder, S. G. Ovchinnikov. 2007-05-10. Phonon and Magnetic Pairing Mechanisms in High-Temperature Superconductors in the Strong Correlation Mode. https://arxiv.org/abs/0705.1402

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