The role of orbital nesting in the superconductivity of Iron-based Superconductors
| Autor: | Fernández-Martin, R., Calderón, M. J., Fanfarillo, L., Valenzuela, B. |
|---|---|
| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Condens. Matter 6(3), 34 (2021) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.3390/condmat6030034 |
| Popis: | We analyze the magnetic excitations and the spin-mediated superconductivity in iron-based superconductors within a low-energy model that operates in the band basis but fully incorporates the orbital character of the spin excitations. We show how the orbital selectivity, encoded in our low-energy description, simplifies substantially the analysis and allows for analytical treatments, while retaining all the main features of both spin-excitations and gap functions computed using multiorbital models. Importantly, our analysis unveils the orbital matching between the hole and electron pockets as the key parameter to determine the momentum-dependence and the hierarchy of the superconducting gaps, instead of the Fermi surface matching as in the common nesting scenario. Comment: 11 pages, 5 figures. Revised version as published. The revised discussion includes the analysis of the nearly degenerate d-wave pairing symmetry solution beside the dominant s$_\pm$ |
| Databáze: | arXiv |
| Externí odkaz: |
|