caa a22 4500 445381280 CHVBK 20180317143018.0 cr unu---uuuuu 170323e20110101xx s 000 0 eng 10.1007/s10948-010-1006-3 doi (NATIONALLICENCE)springer-10.1007/s10948-010-1006-3 Predictions of Multiband s± Strong-Coupling Eliashberg Theory Compared to Experimental Data in Iron Pnictides [Elektronische Daten] [G. Ummarino, D. Daghero, M. Tortello, R. Gonnelli] The experimental critical temperatures and the gap values of the superconducting materials LaFeAsO1−x Fx, SmFeAsO1−x Fx and Ba1−x KxFe2As2, which are exponent of the most important families (1111 and 122) of iron pnictides, can be reproduced by an effective s-wave three-band Eliashberg model in which the dominant coupling is in the interband channel and the order parameter is nodeless but undergoes a sign reversal between hole and electron bands (s± symmetry). In particular, high values of the electron-boson coupling constants and small typical boson energies (in agreement with neutron diffraction experiments) are necessary to reproduce the exact T c, the experimental gap values and their temperature dependence. The same parameters allow fitting the experimental temperature dependence of the upper critical field and predicting the presence of characteristic structures related to the electron-boson coupling in the Andreev-reflection spectra. Springer Science+Business Media, LLC, 2010 Multiband superconductivity nationallicence Fe-based superconductors nationallicence Eliashberg equations nationallicence Non-phononic mechanism nationallicence Ummarino G. Dipartimento di Fisica, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129, Torino, Italy aut Daghero D. Dipartimento di Fisica, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129, Torino, Italy aut Tortello M. Dipartimento di Fisica, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129, Torino, Italy aut Gonnelli R. Dipartimento di Fisica, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129, Torino, Italy aut Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/1-2(2011-01-01), 247-253 1557-1939 24:1-2<247 2011 24 10948 https://doi.org/10.1007/s10948-010-1006-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10948-010-1006-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ummarino G. Dipartimento di Fisica, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129, Torino, Italy aut NATIONALLICENCE 700 1- Daghero D. Dipartimento di Fisica, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129, Torino, Italy aut NATIONALLICENCE 700 1- Tortello M. Dipartimento di Fisica, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129, Torino, Italy aut NATIONALLICENCE 700 1- Gonnelli R. Dipartimento di Fisica, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129, Torino, Italy aut NATIONALLICENCE 773 0- Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/1-2(2011-01-01), 247-253 1557-1939 24:1-2<247 2011 24 10948 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer