Pseudospin exchange interactions in d^7 cobalt compounds: Possible realization of the Kitaev model

Huimei Liu, Giniyat Khaliullin

The current efforts to find the materials hosting Kitaev model physics have been focused on Mott insulators of d^5 pseudospin-1/2 ions Ir^{4+} and Ru^{3+} with t_{2g}^5(S=1/2, L=1)…