Topological magnon insulators: Chern numbers and surface magnons
Topological magnon insulators: Chern numbers and surface magnons
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DOI：
10.1117/12.2235847
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发表时间：
2016-09
期刊：
影响因子：
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通讯作者：
A. Mook;J. Henk;I. Mertig
中科院分区：
文献类型：
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作者：
A. Mook;J. Henk;I. Mertig
在量子力学海森堡模型的框架内，我们解决的拓扑结构的磁振子带结构的铁磁pyrophores，特别是Lu 2 V2 O 7。利用体-边界对应，建立了从体磁振子的陈数到拓扑表面磁振子的基本性质的桥梁。该系统的拓扑性质源于Dzyaloshinskiii-Moriya相互作用，并表现为非零的Berry曲率，这提出了一种方法，可以清楚地区分拓扑表面磁振子和其他平凡磁振子。该方法与实验说明。
Within the framework of a quantum-mechanical Heisenberg model, we address the topology of the magnon band structures of ferromagnetic pyrochlores, in particular Lu2V2O7. The bridge from Chern numbers of bulk magnons to essential properties of topological surface magnons is constructed by the bulk-boundary correspondence. The topological properties of the system which originate from the Dzyaloshinskii-Moriya interaction and show up as nonzero Berry curvatures suggest a method to clearly distinguish topological surface magnons from other, trivial magnons. The method is illustrated with regard to experiments.