The Phenomenology of Iron Pnictides Superconductors Explained in the Framework of 𝑠-Wave Three-Band Eliashberg Theory

Table 1

The effect of the intraband terms and Coulomb interaction on the gap values.

Pure interband	𝜆𝑖𝑖=0.	𝜇^∗𝑖𝑗=0	Ω0=10 meV
Free parameters	𝜆31=4.267	𝜆32=1.138	—
Results	Δ1=10.29 meV	Δ2=5.56 meV	|Δ3|=10.22 meV
Intraband	𝜆𝑖𝑖=0.4	𝜇^∗𝑖𝑗=0	Ω0=10 meV
Free parameters	𝜆31=3.866	𝜆32=0.471	—
Results	Δ1=10.30 meV	Δ2=5.62 meV	|Δ3|=10.24 meV
Intraband and Coulomb	𝜆𝑖𝑖=0.4	𝜇^∗𝑖𝑗=0.1	Ω0=10 meV
Free parameters	𝜆31=2.730	𝜆32=0.758	—
Results	Δ1=7.49 meV	Δ2=5.72 meV	|Δ3|=7.98 meV