Half-metallic ferromagnetism induced by dynamic electron correlations in   VAs
  The electronic structure of the VAs compound in the zinc-blende structure is investigated using a combined density-functional and dynamical mean-field theory approach. Contrary to predictions of a ferromagnetic semiconducting ground state obtained by density-functional calculations, dynamical correlations induce a closing of the gap and produce a half-metallic ferromagnetic state. These results emphasize the importance of dynamic correlations in materials suitable for spintronics. 
L. Chioncel, Ph. Mavropoulos, M. Le\v{z}ai\'c, S. Bl\"ugel, E.   Arrigoni, M.I. Katsnelson, A.I. Lichtenstein