Physics – Condensed Matter – Superconductivity
Scientific paper
2010-02-16
Phys. Rev. B 83, 134513 (2011)
Physics
Condensed Matter
Superconductivity
reevaluated electron-phonon coupling strength, added references
Scientific paper
10.1103/PhysRevB.83.134513
The time of life of fermionic quasiparticles, the distribution of which in the momentum-energy space can be measured by angle resolved photoemission (ARPES), is the first quantity to look for fingerprints of interaction responsible for the superconducting pairing. Such an approach has been recently used for superconducting cuprates, but its direct application to pnictides was not possible due to essential three-dimensionality of the electronic band structure and magnetic ordering. Here, we report the investigation of the quasiparticle lifetime in LiFeAs, a non-magnetic stoichiometric superconductor with a well separated two-dimensional band. We have found two energy scales: the lower one contains clear fingerprints of optical phonon modes while the higher scale indicates a presence of strong electron-electron interaction. The result suggests that LiFeAs is a phonon mediated superconductor with strongly enhanced electronic density of states at the Fermi level.
Behr Günter
Borisenko S. V.
Buechner Bernd
Evtushinsky D. V.
Follath R.
No associations
LandOfFree
Time of life as it is in LiFeAs does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Time of life as it is in LiFeAs, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Time of life as it is in LiFeAs will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-51132