2018/01/30 by Pierre A. Pantaleón, Yang Xian, Y. Xian
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Enhanced Data Rates for GSM Evolution #Graphene research and applications #Honeycomb #Insulator (electricity) #Lattice (music) #Magnon #Topological Materials and Phenomena #Topological insulator #cond-mat.mes-hall
paper · pdf · doi:10.7566/jpsj.87.064005
published as J. Phys. Soc. Jpn., Vol.87, No.6 (2018) · 10 pages, 8 figures
arxiv created 2018/01/30 · openalex created_date 2018/02/23 · openalex publication_date 2018/05/18 · arxiv updated 2018/05/22 · openalex updated_date 2026/08/05
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.