Effects of Edge on-Site Potential in a Honeycomb Topological Magnon Insulator

Yang Xian, Pierre Anthony Pantaleon Peralta

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    While the deviation of the edge on-site potential from the bulk values in a magnonic topological honeycomb lattice leads to the formation of edge states in a bearded boundary, this is not the case for a zigzag termination, where no edge state is found. In a semi-infinite lattice, the intrinsic on-site interactions along the boundary sites generate an effective defect and this gives rise to Tamm-like edge states. If a nontrivial gap is induced, both Tamm-like and topologically protected edge states appear in the band structure. The effective defect can be strengthened by an external on-site potential, and the dispersion relation, velocity and magnon density of the edge states all become tunable.
    Original languageEnglish
    Article number064005
    Number of pages9
    JournalPhysical Society of Japan. Journal
    Issue number6
    Early online date18 May 2018
    Publication statusPublished - 15 Jun 2018


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