Effect of the long-range Coulomb interaction on phase diagram of the Kohn-Luttinger superconducting state in idealized graphene
| Autor: | Kagan, M. Yu., Mitskan, V. A., Korovushkin, M. M. |
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| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | J. Low Temp. Phys. (2016) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1007/s10909-015-1427-2 |
| Popis: | The effect of the long-range Coulomb interaction on the realization of the Kohn-Luttinger superconductivity in idealized monolayer doped graphene is studied. It is shown that the allowance for the Kohn-Luttinger renormalizations up to the second order in perturbation theory in the on-site Hubbard interaction inclusively, as well as the intersite Coulomb interaction significantly affects the competition between the superconducting phases with the $f$-wave, $p+ip$-wave and $d + id$-wave symmetries of the order parameter. It is shown that the account for the Coulomb repulsion of electrons located at the next-nearest neighboring atoms in such a system changes qualitatively the phase diagram and enhances the critical superconducting temperature. Comment: 6 pages, 3 figures. Submitted to the Special Issue of "Journal of Low Temperature Physics" "Recent Progress in Low Temperature Physics - NT37" |
| Databáze: | arXiv |
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