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Article

The Role of Orbital Nesting in the Superconductivity of Iron-Based Superconductors

1
Instituto de Ciencia de Materiales de Madrid, ICMM-CSIC, Cantoblanco, 28049 Madrid, Spain
2
Department of Physics, University of Florida, Gainesville, FL 32611, USA
3
Scuola Internazionale Superiore di Studi Avanzati (SISSA), Via Bonomea 265, 34136 Trieste, Italy
*
Author to whom correspondence should be addressed.
Academic Editors: Andrea Perali, Luca Dell’Anna and Luca Salasnich
Condens. Matter 2021, 6(3), 34; https://doi.org/10.3390/condmat6030034
Received: 26 July 2021 / Revised: 31 August 2021 / Accepted: 3 September 2021 / Published: 14 September 2021
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. View Full-Text
Keywords: iron-based superconductors; low energy model; magnetism; spin-mediated superconductivity; orbital nesting iron-based superconductors; low energy model; magnetism; spin-mediated superconductivity; orbital nesting
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MDPI and ACS Style

Fernández-Martín, R.; Calderón, M.J.; Fanfarillo, L.; Valenzuela, B. The Role of Orbital Nesting in the Superconductivity of Iron-Based Superconductors. Condens. Matter 2021, 6, 34. https://doi.org/10.3390/condmat6030034

AMA Style

Fernández-Martín R, Calderón MJ, Fanfarillo L, Valenzuela B. The Role of Orbital Nesting in the Superconductivity of Iron-Based Superconductors. Condensed Matter. 2021; 6(3):34. https://doi.org/10.3390/condmat6030034

Chicago/Turabian Style

Fernández-Martín, Raquel, María J. Calderón, Laura Fanfarillo, and Belén Valenzuela. 2021. "The Role of Orbital Nesting in the Superconductivity of Iron-Based Superconductors" Condensed Matter 6, no. 3: 34. https://doi.org/10.3390/condmat6030034

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