We present the results of extended theoretical LDA+DMFT calculations for a new iron-pnictide high temperature superconductor NaFeAs compared with the recent high quality angle-resolved photoemission (ARPES) experiments on this system [1]. The universal manifestation of correlation effects in iron-pnictides is narrowing of conducting bands near the Fermi level. Our calculations demonstrate that for NaFeAs the effective mass is renormalized on average by a factor of the order of 3, in good agreement with ARPES data. This is essentially due to correlation effects on Fe-3d orbitals only and no additional interactions with with any kind of Boson modes, as suggested in [1], are necessary to describe the experiment. Also we show that ARPES data taken at about 160 eV beam energy most probably corresponds to kz=π Brillouin zone boundary, while ARPES data measured at about 80 eV beam energy rather represents kz=0. Contributions of different Fe-3d orbitals into spectral function map are also discussed.
@article{arxiv.1505.04963,
title = {Electronic structure of NaFeAs superconductor: LDA+DMFT calculations compared with ARPES experiment},
author = {I. A. Nekrasov and N. S. Pavlov and M. V. Sadovskii},
journal= {arXiv preprint arXiv:1505.04963},
year = {2016}
}