a) Temperature dependence of the static local spin susceptibility of nickel in DFT+DMFT, compared to the ‘bubble’ approximation and to the non-interacting one. To show that the characteristic temperature dependence of the non-interacting susceptibility originates from the t 2g sector and its van Hove singularity, we also plot the intra-orbital contribution to the full (‘full’), considering the cases where either the five orbital-diagonal terms of are summed (‘ ’), or only the two e g terms are retained (‘ e g only’). This shows the more conventional Pauli spin response of the e g part is in agreement with the fact that the e g DOS is much smoother around E F=0. ( b) Inverse susceptibility for the non-interacting and DFT+DMFT case. This illustrates the main peculiarity of nickel, namely that already the non-interacting spin response is characterized by a 1/ T law. As explained in the text, this is due to pre-localized moments arising from the vicinity to the van Hove singularity. ( c) Electronic band dispersion of nickel on the hexagonal face of the Brillouin zone, close to the L point. The colors indicate the energy of the band relative to the Fermi level, which is located at zero energy. The extended flat region around the shallow maximum at L is responsible for the van Hove singularity. ( d) t 2g and e g DOS for energies close to E F=0. In the inset, the electronic state dispersion of nickel, close to the W-L-K region and to the top of the band is shown. The distance of the sharp step in the t 2g orbitals at E=0.17 eV corresponds to the kink of the non-interacting susceptibility in b at T=2,000 K. ( e) for β=4 eV −1 (dashed) and 30 eV −1 (solid). ( f) Instantaneous ( τ=0) and long-time ( ) values of . From the latter one can clearly see that the moment is eventually screened at temperatures much lower than T C. The comparison with the non-interacting and with the ‘bubble’ results shows also that vertex corrections are important and the DFT+DMFT result cannot be obtained by using ‘dressed’ quasiparticle propagators (see also b).