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In conventional theories, topological band properties are intrinsic characteristics of the bulk material and do not depend on the choice of the reference frame. In this scenario, the principle of bulk‐edge correspondence can be used to predict the existence of edge states between topologically distinct materials. In this study, a 2D elastic phononic plate is proposed with a Kekulé‐distorted honeycomb...
In article number 2005160, Fabio Semperlotti and Ting‐Wei Liu present a structural phononic waveguide engraved with a Kekule pattern, which enables performance analogous to a topological insulator. The elastic modes present a unique pseudospin texture distinct from its electronic counterpart. Backscattering‐immune gapless edge states on a dislocation interface are realized and imaged via laser vibrometry...
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