Electron-phonon coupling in 122 Fe pnictides analyzed by femtosecond 
time-resolved photoemission

Rettig, L.; Cortés, Rocia; Jeevan, H. S.; Gegenwart, P.; Wolf, T.; Fink, J.; Bovensiepen, U.

doi:10.1088/1367-2630/15/8/083023

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Electron-phonon coupling in 122 Fe pnictides analyzed by femtosecond time-resolved photoemission

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Cortés, Rocia
Fachbereich Physik, Freie Universität Berlin;
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Citation

Rettig, L., Cortés, R., Jeevan, H. S., Gegenwart, P., Wolf, T., Fink, J., et al. (2013). Electron-phonon coupling in 122 Fe pnictides analyzed by femtosecond time-resolved photoemission. New Journal of Physics, 15(8): 083023. doi:10.1088/1367-2630/15/8/083023.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0014-4EE6-A

Abstract

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 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.