  The correlated electronic structure of iron, cobalt and nickel is
investigated within the dynamical mean-field theory formalism, using the newly
developed full-potential LMTO-based LDA+DMFT code. Detailed analysis of the
calculated electron self-energy, density of states and the spectral density are
presented for these metals. It has been found that all these elements show
strong correlation effects for majority spin electrons, such as strong damping
of quasiparticles and formation of a density of states satellite at about -7 eV
below the Fermi level. The LDA+DMFT data for fcc nickel and cobalt (111)
surfaces and bcc iron (001) surface is also presented. The electron self energy
is found to depend strongly on the number of nearest neighbors, and it
practically reaches the bulk value already in the second layer from the
surface. The dependence of correlation effects on the dimensionality of the
problem is also discussed.
