期刊论文详细信息
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS 卷:533
Topological magnons in ferromagnetic Kitaev-Heisenberg model on CaVO lattice
Article
Deb, Moumita1  Ghosh, Asim Kumar1 
[1] Jadavpur Univ, Dept Phys, 188 Raja Subodh Chandra Mallik Rd, Kolkata 700032, India
关键词: Topological phase;    Edge states;    Topological phase transition;    Thermal hall conductance;    Chern numbers;    Kitaev-Heisenberg model;   
DOI  :  10.1016/j.jmmm.2021.167968
来源: Elsevier
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【 摘 要 】

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.

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