Electron–phonon coupling in 122 Fe pnictides analyzed by femtosecond time-resolved photoemission
نویسندگان
چکیده
Based on the results from femtosecond time-resolved photoemission, we compare three different methods for the determination of the electron–phonon coupling constant λ in Euand 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. 7 Author to whom any correspondence should be addressed. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. New Journal of Physics 15 (2013) 083023 1367-2630/13/083023+11$33.00 © IOP Publishing Ltd and Deutsche Physikalische Gesellschaft
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