Kitaev interactions between j = 1/2 moments in honeycomb Na2IrO3 are large and ferromagnetic: insights from ab initio quantum chemistry calculations. - Katukuri, Vamshi M; Nishimoto, S; Yushankhai, V; Stoyanova, A; Kandpal, H; Choi, Sungkyun; Coldea, R; Rousochatzakis, I; Hozoi, L; Brink, Jeroen van den (New Journal of Physics, 2014)