Archivio Istituzionale della RicercaThe phenomenology of iron pnictide superconductors can be explained in the framework of a three-band s± wave Eliashberg theory with only two free parameters plus a feedback effect, i.e., the effect of the condensate on the antiferromagnetic spin fluctuations responsible for the superconductivity in these compounds. I have examined the experimental data of four materials, LaFeAsO1−xFx , SmFeAsO1−xFx, Ba1−xKxFe2As2, and Ba(FexCo1−x )2As2, and I have found that it is possible to reproduce the experimental critical temperature and gap values in a moderate strong-coupling regime, λtot ≈ 1.7 − 2.0.
Multiband s± Eliashberg theory and temperature-dependent spin-resonance energy in iron pnictide superconductors / Ummarino, Giovanni. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - STAMPA. - 83:(2011), pp. 092508-1-092508-4. [10.1103/PhysRevB.83.092508]
Multiband s± Eliashberg theory and temperature-dependent spin-resonance energy in iron pnictide superconductors
UMMARINO, Giovanni
2011
Abstract
The phenomenology of iron pnictide superconductors can be explained in the framework of a three-band s± wave Eliashberg theory with only two free parameters plus a feedback effect, i.e., the effect of the condensate on the antiferromagnetic spin fluctuations responsible for the superconductivity in these compounds. I have examined the experimental data of four materials, LaFeAsO1−xFx , SmFeAsO1−xFx, Ba1−xKxFe2As2, and Ba(FexCo1−x )2As2, and I have found that it is possible to reproduce the experimental critical temperature and gap values in a moderate strong-coupling regime, λtot ≈ 1.7 − 2.0.
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https://hdl.handle.net/11583/2397654
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