Edge on-site potential effects in a honeycomb topological magnon insulator

Abstract

The difference between the edge on-site potential and the bulk values in a magnonic topological honeycomb lattice leads to the formation of edge states in a bearded boundary, and the same difference is found to be the responsible for the absence of edge states in a zig-zag termination. In a finite lattice, the intrinsic on-site interactions along the boundary sites generate an effective defect and Tamm-like edge states appear for both zig-zag and bearded terminations. If a non-trivial gap is induced, 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 become tunable.

10 pages, 8 figures

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• Unconventional Thermal Magnon Hall Effect in a Ferromagnetic Topological Insulator
• Insights on magnon topology and valley-polarization in 2D bilayer quantum magnets
• A new class of nonreciprocal spin waves on the edges of 2D antiferromagnetic honeycomb nanoribbons
• Topological Magnon Insulator with a Kekule Bond Modulation
• Magnonic Floquet Hofstadter Butterfly
• Valley-polarized domain wall magnons in 2D ferromagnetic bilayers
• Topological Corner States in Graphene by Bulk and Edge Engineering
• Nonlinear localized excitations in a topological ferromagnetic honeycomb lattice
• Asymmetric dynamics of edge exchange spin waves in honeycomb nanoribbons with zigzag and bearded edges boundaries
• Theoretical realization of rich magnon topology by symmetry-breaking in honeycomb bilayer ferromagnets
• Edge state in AB-stacked bilayer graphene and its correspondence with SSH ladder
• Discretized dynamics of exchange spin wave bulk and edge modes in honeycomb nanoribbons with armchair edge boundaries
• Electronic Manipulation of Magnon Topology by Chirality Injection from Boundaries
• Mirror-induced effects in cavity polaritonics: Influence on edge states
• Long-distance coupling of spin qubits via topological magnons