Magnetic Phase Diagrams and Spin Hamiltonian of Monoclinic $\alpha$-RuCl$_3$ from Angle-Dependent Torque Studies
The layered honeycomb $\alpha$-RuCl$_3$ has been much explored as a candidate to display unconventional cooperative magnetism between spin-orbit entangled $j_{\rm eff}=1/2$ Ru$^{3+}$ magnetic moments stabilized by strongly-frustrated, Kitaev and other bond-dependent anisotropic interactions. Most studies so far have fo...