Superconductivity from repulsion: Ginzburg-Landau phenomenology of cuprates

V. I. Belyavsky; Yu. V. Kopaev

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arXiv · cond-mat/0603099

Superconductivity from repulsion: Ginzburg-Landau phenomenology of cuprates

V. I. Belyavsky·Yu. V. Kopaev

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Abstract

We develop Ginzburg-Landau approach to the problem of superconducting pairing with large momentum under screened Coulomb repulsion (eta_K-pairing). Two-component order parameter arising in this scheme can be associated with charge and orbital current degrees of freedom of the relative motion of eta_K-pair corresponding to superconducting and orbital antiferromagnetic ordered states, respectively. All basic features of the phase diagram of cuprate superconductors result directly from the eta_K-pairing concept.

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V. I. Belyavsky, Yu. V. Kopaev. 2006-03-05. Superconductivity from repulsion: Ginzburg-Landau phenomenology of cuprates. https://arxiv.org/abs/cond-mat/0603099

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