Stability of the superconducting $${d_{{x^2} - {y^2}}}$$ phase in high-T c superconductors with respect to the intersite coulomb repulsion of holes at oxygen
| Autor: | A. F. Barabanov, M. M. Korovushkin, D. M. Dzebisashvili, V. V. Val’kov |
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| Rok vydání: | 2016 |
| Předmět: | |
| Zdroj: | JETP Letters. 103:385-389 |
| ISSN: | 1090-6487 0021-3640 |
| Popis: | It has been shown that, because of the two-orbital character of the subsystem of holes located at oxygen sites and the spatial separation of this subsystem from that of spins at copper ions, the superconducting phase in high-T c superconductors is stable with respect to the strong Coulomb repulsion of holes located at nearestneighbor oxygen sites if the order parameter has the $${d_{{x^2} - {y^2}}}$$ symmetry. This effect is due to the symmetry characteristics of the Coulomb potential, owing to which the equation determining the Cooper pairing in the $${d_{{x^2} - {y^2}}}$$ channel does not include this potential. |
| Databáze: | OpenAIRE |
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