Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10727982 | Physics Letters A | 2005 | 5 Pages |
Abstract
There are asymmetric and symmetric solutions of the self-consistency equation which takes into account both phonon-mediated and Coulomb pairing interactions. The first of them leads to the order parameter with a nodal line and, in the case of pairing with large momentum, exists at any repulsive and attractive strengths. The second one arises if the attraction exceeds a level depending on the repulsion strength and dominates the pairing in the strong attraction limit. The competition of attraction and repulsion results in unusual isotope-effect exponent observed in the cuprates.
Related Topics
Physical Sciences and Engineering
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Authors
V.I. Belyavsky, Yu.V. Kopaev, N.T. Nguyen, Yu.N. Togushova,