Abstract
The experimental data available to date in the literature corresponding to the paramagnetic-spin density wave transition in nonsuperconducting LaOFeAs are discussed. In particular, we note that a relative decrease in the density of states on the Fermi level and formation of a pseudogap occur upon a spin density wave transition. The values of these quantities are not properly described in density functional theory. The agreement with experimental estimations becomes more accurate with the use of a fixed spin moment procedure when the iron spin moment is set to m experimental value. Strong electron correlations that are not included m the present calculation scheme may lead both to a decrease in the spin moment and to a renormalization of the energy spectrum in the vicinity of the Fermi level for correct description of the discussed characteristics.
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Korotin, M.A., Streltsov, S.V., Shorikov, A.O. et al. Pseudogap value in the energy spectrum of LaOFeAs: a fixed spin moment treatment. J. Exp. Theor. Phys. 107, 649–652 (2008). https://doi.org/10.1134/S1063776108100129
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DOI: https://doi.org/10.1134/S1063776108100129