Spin-orbit effects in Na${}_4$Ir${}_3$O${}_8$, a hyper-kagomé lattice antiferromagnet

Gang Chen, Leon Balents

We consider spin-orbit coupling effects in Na${}_4$Ir${}_3$O${}_8$, a material in which Ir${}^{4+}$ spins form an hyper-kagomé lattice, a three-dimensional network of corner-sharing triang…