Mirror Nesting of the Fermi Contour and Superconducting Pairing from the Repulsive Interaction

Details Mirror Nesting of the Fermi Contour and Superconducting Pairing from the Repulsive Interaction Mirror Nesting of the Fermi Contour and Superconducting Pairing from the Repulsive Interaction

2003-10-06

arxiv.org/abs/cond-mat/0310096v1

Physics

Condensed Matter

Superconductivity

11 pages, 3 figures

Scientific paper

10.1023/B:JOSC.0000021230.42743.

We consider the necessary conditions of superconducting pairing at repulsive interaction between particles composing a pair with large total momentum: (1) the existence of, at least, one negative eigenvalue of the repulsion potential and (2) mirror nesting of the Fermi contour. Under these conditions, we represent the solution of the self-consistency equation continuously depending on the momentum of the relative motion of the pair. The corresponding superconducting order parameter changes its sign on a line crossing the Fermi contour inside the domain of definition of the relative motion pair momentum. We argue that repulsive-induced superconducting pairing with large total pair momentum may be just the case relating to high-temperature superconducting cuprates.

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