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首页> 外文期刊>Physical review >Magnonic quantum spin Hall state in the zigzag and stripe phases of the antiferromagnetic honeycomb lattice
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Magnonic quantum spin Hall state in the zigzag and stripe phases of the antiferromagnetic honeycomb lattice

机译：反铁磁蜂窝晶格的锯齿形和条纹相中的磁量子自旋霍尔态

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摘要

We investigated the topological property of magnon bands in the collinear magnetic orders of zigzag and stripe phases for the antiferromagnetic honeycomb lattice and identified Berry curvature and symmetry constraints on the magnon band structure. Different symmetries of both zigzag and stripe phases lead to different topological properties, in particular, the magnon bands of the stripe phase being disentangled with a finite Dzyaloshinskii-Moriya (DM) term with nonzero spin Chern number. This is corroborated by calculating the spin Nernst effect. Our study establishes the existence of a nontrivial magnon band topology for all observed collinear antiferromagnetic honeycomb lattices in the presence of the DM term.
机译：我们研究了反铁磁蜂窝晶格在之字形和条纹相共线磁阶中的磁振子带的拓扑特性，并确定了在磁振子带结构上的贝里曲率和对称约束。之字形相位和条带相位的不同对称性会导致不同的拓扑特性，特别是，条带相位的磁振子带与具有非零自旋Chern数的有限Dzyaloshinskii-Moriya（DM）项解缠。通过计算自旋能斯特效应可以证实这一点。我们的研究为存在DM项的所有观察到的共线反铁磁性蜂窝状晶格建立了一个非平凡的磁能带拓扑。

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  • 来源
    《Physical review》 |2018年第18期|180401.1-180401.5|共5页
  • 作者

    Ki Hoon Lee; Suk Bum Chung; Kisoo Park; Je-Geun Park;

  • 作者单位

    Center for Correlated Electron Systems, Institute for Basic Science (IBS), Seoul National University, Seoul 08826, Korea,Department of Physics and Astronomy, Seoul National University, Seoul 08826, Korea;

    Center for Correlated Electron Systems, Institute for Basic Science (IBS), Seoul National University, Seoul 08826, Korea,Department of Physics and Astronomy, Seoul National University, Seoul 08826, Korea,Department of Physics, University of Seoul, Seoul 02504, Korea;

    Center for Correlated Electron Systems, Institute for Basic Science (IBS), Seoul National University, Seoul 08826, Korea,Department of Physics and Astronomy, Seoul National University, Seoul 08826, Korea;

    Center for Correlated Electron Systems, Institute for Basic Science (IBS), Seoul National University, Seoul 08826, Korea,Department of Physics and Astronomy, Seoul National University, Seoul 08826, Korea;

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