Electronic Correlations in Vanadium Revealed by Electron-Positron   Annihilation Measurements
  The electronic structure of vanadium measured by Angular Correlation of electron-positron Annihilation Radiation (ACAR) is compared with the predictions of the combined Density Functional and Dynamical Mean-Field Theory (DMFT). Reconstructing the momentum density from five 2D projections we were able to determine the full Fermi surface and found excellent agreement with the DMFT calculations. In particular, we show that the local, dynamic self-energy corrections contribute to the anisotropy of the momentum density and need to be included to explain the experimental results. 
Josef Andreas Weber, Diana Benea, Wilhelm H. Appelt, Hubert Ceeh,   Wolfgang Kreuzpaintner, Michael Leitner, Dieter Vollhard...
cond-mat.str-el