Topological magnons in ferromagnetic Kitaev-Heisenberg model on CaVO lattice

A number of topological phases are found to emerge in the ferromagnetic Kitaev-Heisenberg model on CaVO lattice in the presence of Dzyaloshinskii-Moriya interaction. Heisenberg and Kitaev terms have been considered on nearest and next-nearest neighbor bonds in a variety of ways. Both isotropic and anisotropic couplings are taken into account. Topological phases are characterized by Chern numbers for the distinct magnon bands as well as the number of modes for topologically protected gapless magnon edge states. Band structure, dispersion relation along the high-symmetric points of first Brillouin zone, density of states and thermal Hall conductance have been evaluated for every phase. An extensive Phase diagram has been constructed. Topological phase transition in the parameter space is also studied.

Automated summary

Various topological phases have been observed in the ferromagnetic Kitaev-Heisenberg model on the CaVO lattice in the presence of the Dzyaloshinskii-Moriya interaction. The study includes evaluation of band structures, dispersion relations, density of states, and thermal Hall conductance for each phase, as well as the construction of an extensive phase diagram and investigation of topological phase transitions in parameter space.