Realization of a three-dimensional spin–anisotropic harmonic honeycomb iridate
K.A. Modic, T.E. Smidt, I. Kimchi, N.P. Breznay, A. Biffin, S. Choi, R.D. Johnson, R. Coldea, P. Watkins-Curry, G.T. McCandless, J.Y. Chan, F. Gandara, Z. Islam, A. Vishwanath, A. Shekhter, R.D. McDonald, J.G. Analytis, Nature Communications 5 (2014).