# Topological phases of higher Chern numbers in Kitaev-Heisenberg ferromagnet with further-neighbor interactions.

08:00 EDT 20th May 2019 | BioPortfolio

### Summary of "Topological phases of higher Chern numbers in Kitaev-Heisenberg ferromagnet with further-neighbor interactions."

Emergence of multiple topological phases with a series of Chern numbers, &#13; $\pm 1$, $\mp 1$, $\pm 2$, $\mp 2$, $\pm 3$ and $\mp 4$, is &#13; found in a ferromagnetic &#13; Kitaev-Heisenberg-spin-anisotropic model on honeycomb lattice with &#13; further neighbor interactions in the presence of an external magnetic field. &#13; Magnon Chern insulating dispersions of this two-band model are studied &#13; by using linear spin-wave theory formulated on the exact &#13; ferromagnetic ground state. &#13; Magnon edge states are obtained for the respective topological phases &#13; along with density of states. A topological phase diagram of this model &#13; is presented. Behavior of thermal Hall conductivity for those phases &#13; is studied. Sharp jumps of thermal hall conductivity is noted near the &#13; vicinity of phase transition points. Topological phases of the Kitaev &#13; spin-liquid compounds, $\alpha$-RuCl$_3$, X$_2$IrO$_3$, X = (Na, Li) &#13; and CrY$_3$, Y = (Cl, Br, I) are characterized based &#13; on this theoretical findings. &#13.

### Journal Details

Name: Journal of physics. Condensed matter : an Institute of Physics journal
ISSN: 1361-648X
Pages:

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