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Electron-phonon coupling in 122 Fe pnictides analyzed by femtosecond time-resolved photoemission
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Electron-phonon coupling in 122 Fe pnictides analyzed by femtosecond time-resolved photoemission
classification
cond-mat.supr-con
keywords
electron-phononcompoundscouplingfemtosecondlambdamethodsphotoemissionthree
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Based on results from femtosecond time-resolved photoemission, we compare three different methods for determination of the electron-phonon coupling constant {\lambda} in Eu and Ba-based 122 FeAs compounds. We find good agreement between all three methods, which reveal a small {\lambda} < 0.2. This makes simple electron-phonon mediated superconductivity unlikely in these compounds.
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