Electron-phonon coupling in 122 Fe pnictides analyzed by femtosecond time-resolved photoemission
arXiv:1304.5355 · doi:10.1088/1367-2630/15/8/083023
Abstract
Based on results from femtosecond time-resolved photoemission, we compare three different methods for determination of the electron-phonon coupling constant λ in Eu and Ba-based 122 FeAs compounds. We find good agreement between all three methods, which reveal a small λ < 0.2. This makes simple electron-phonon mediated superconductivity unlikely in these compounds.
11 pages, 3 figures