2020/08/31 by Ting-Wei Liu, Ting‐Wei Liu, Fabio Semperlotti
Engineering · Materials Science · Mathematics · Physics and Astronomy · #Acoustic Wave Phenomena Research #Computer science #Condensed matter physics #Dislocation #Enhanced Data Rates for GSM Evolution #Invariant (physics) #Materials science #Mathematics #Metamaterials and Metasurfaces Applications #Optics #Physics #Quantum mechanics #State (computer science) #Topological Materials and Phenomena #Translation (biology) #cond-mat.mes-hall
paper · pdf · doi:10.1002/adma.202005160
Revision and adding Acknowledgements and Supporting Information
arxiv created 2020/11/30 · openalex publication_date 2021/01/20 · arxiv updated 2021/01/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Abstract 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 pattern engraved on it. It is found that the pseudospin and the pseudospin‐dependent Chern numbers are not invariant properties, and the number is no longer a sufficient indicator to examine the existence of the edge state. The distinctive pseudospin texture and the pseudomagnetic field are also revealed. Finally, the synthetic helical edge states are successfully devised and experimentally implemented on a dislocation interface connecting two subdomains with bulk pattern identical up to a relative translation. The edge state is also imaged via laser vibrometry.