Effect of long-range interactions on the Kohn-Luttinger mechanism of the cooper instability in the Shubin-Vonsowsky model
| Autor: | V. A. Mitskan, V. V. Val’kov, M. M. Korovushkin, M. Yu. Kagan |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Condensed Matter::Quantum Gases
Physics Superconductivity Physics and Astronomy (miscellaneous) Solid-state physics Condensed Matter - Superconductivity FOS: Physical sciences Order (ring theory) Instability Superconductivity (cond-mat.supr-con) Renormalization Quantum mechanics Coulomb Condensed Matter::Strongly Correlated Electrons SPHERES Perturbation theory |
| Zdroj: | JETP Letters. 97:226-232 |
| ISSN: | 1090-6487 0021-3640 |
| Popis: | The problem of Cooper instability is studied by implementing the Kohn-Luttinger mechanism in the framework of the Shubin-Vonsowsky model taking into account the intersite Coulomb interactions within the first and second coordination spheres. It is shown that the Kohn-Luttinger renormalization for the effective interaction in the second-order terms of perturbation theory, as well as the inclusion of intersite hoppings in the second and third coordination spheres, significantly affects the interplay between the superconducting phases with $d_{xy}$-, $p$-, $s$-, and $d_{x^2-y^2}$-wave symmetries of the order parameter. 7 pages, 6 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|