Journal
PHYSICAL REVIEW B
Volume 83, Issue 13, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.83.134513
Keywords
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Funding
- DFG [KN393/4, BO 1912/2-1, BE1749/13, 486RUS 113/982/0-1, SPP 1458]
- Ministry of Science and Education of the Russian Federation [P-279]
- RFBR-DFG [10-03-91334]
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By applying a state-of-the-art angle-resolved photoemission to LiFeAs, the only stoichiometric pnictide superconductor without magnetic ordering, we identify a clear fingerprint of the phonon spectrum in the fermionic self-energy and estimate the electron-phonon coupling strength, which appears to be sufficient to mediate the superconductivity. This result suggests that the superconductivity in pnictides could be based on the conventional phonon pairing enhanced by the van Hove singularity in the electronic density of states and by the strong electron-electron interaction.
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