https://doi.org/10.1140/epjb/s10051-023-00571-6
Regular Article - Solid State and Materials
Inter-orbital hopping effects on the superconducting state properties of a two-band BCS model
1
Laboratory SUPERCOMP, Physics Department, FACYT-UC, Carabobo, Venezuela
2
Departamento de Matemática, CCNE, UFSM, CEP 97.105-900, Santa Maria, RS, Brazil
3
Department of Physics, California State University, 92831, Fullerton, CA, USA
Received:
29
April
2023
Accepted:
13
July
2023
Published online:
24
July
2023
We analyze the superconducting state properties for the case of a two-band self-consistent BCS model that considers an electron band structure suitable for iron based superconducting materials. The superconducting gap parameters corresponding to each component electron band, 
and 
, are investigated as function of temperature, T, inter-orbital hopping parameter, 
, and electron doping, N. The values of the two ratios 
and 
are not universal, and they are strongly dependent on the value of the hopping parameter, . In the case of 
-wave symmetry, the superconducting state in the system exists only at certain electron doping concentrations, leading to a complex superconducting phase diagram for iron based superconducting materials.
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© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
