Abstract
In this work, we present a theoretical explanation of the recent high quality angle-resolved photoemission (ARPES) experiments on a new iron-pnictide high temperature superconductor NaFeAs (Evtushinsky arXiv: 1409.1537 ). Well known and rather universal manifestation of correlation effects in iron-pnictides is the renormalization of conducting bands near the Fermi level. Most suitable theoretical technique to describe this effect is LDA + DMFT. Our LDA + DMFT calculations demonstrate that for NaFeAs the mass renormalization by the factor of the order of 3, in good agreement with ARPES experiments, can be achieved, taking into account only correlations on Fe-3d orbitals. No additional interactions with “bosonic” modes, as proposed in Evtushinsky (arXiv: 1409.1537 ), are necessary to describe the experimental data.
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