Kitaev interactions in the Co honeycomb antiferromagnets Na${}_3$Co${}_2$SbO${}_6$ and Na${}_2$Co${}_2$TeO${}_6$

M. Songvilay, J. Robert, S. Petit +10

Co${}^{2+}$ ions in an octahedral crystal field, stabilise a j${}_{eff}$ = 1/2 ground state with an orbital degree of freedom and have been recently put forward for realising Kitaev in…