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


Journal Details

This article was published in the following journal.

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


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