%0 conference lecture %@ %A Michl, A.,Ferstl, P.,Hammer, L.,Schneider, M.A.,Mueller, S. %D 2014 %J Kondensierte Materie, DPG Fruehjahrstagung 2014 %N %P %T Ground-state structures for oxygen adsorption on Ir(100)-(1x1) investigated via the cluster-expansion method %U %X