Microscopic model for the semiconductor-to-ferromagnetic-metal transition in FeSi1−xGex Alloys Kai-Yu Yang, Y. Yamashita, A. M. Läuchli, M. Sigrist and T. M. Rice EPL, 95 4 (2011) 47007 Published online: 25 July 2011 DOI: 10.1209/0295-5075/95/47007