Fig. 1: RuX3 (X = Cl, Br, I) crystal structure, magnetic structure, and resistivity.
From: Electronic and magnetic properties of the RuX3 (X = Cl, Br, I) family: two siblings—and a cousin?

a Honeycomb layer in the RuX3 (X = Cl, Br, I) trihalides with bond definitions, cubic axes (xyz) and crystallographic axes (abc) in the R\(\bar{3}\) structure, b Zigzag magnetic order in a honeycomb layer from two perspectives, with definitions of in-plane-angle ϕ and out-of-plane-angle θ. c Comparison of experimental dc resistivities as a function of temperature. Data was extracted from plots in the following references and labeled by respective first-author names: RuCl310, RuBr325, and RuI326,27. The shaded background depicts a typical range of resistivity for bad metals28.