• Chinese Physics B
  • Vol. 29, Issue 10, (2020)
Zhang-Zhao Yang1, Jin-Heng Chen1, Yao-Yin Peng1, and Xin-Ye Zou1、2、†
Author Affiliations
  • 1Key Laboratory of Modern Acoustics (MOE), Institute of Acoustics, Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 20093, China
  • 2State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China
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    DOI: 10.1088/1674-1056/ab9c0e Cite this Article
    Zhang-Zhao Yang, Jin-Heng Chen, Yao-Yin Peng, Xin-Ye Zou. Symmetry-controlled edge states in graphene-like topological sonic crystal[J]. Chinese Physics B, 2020, 29(10): Copy Citation Text show less

    Abstract

    Unique topological states emerged in various topological insulators (TI) have been proved with great application value for robust wave regulation. In this work, we demonstrate the parity inversion related to the definition of the primitive cell in one common lattice, and realize a type of symmetry-controlled edge states confined on the zigzag interfaces of the graphene-like sonic topological crystal. By simply sliding the selected ‘layer’ near the interface, the coupling of the pseudospin states induced by the multiple scattering for the C6v lattice results in the adjustment of the edge states. Based on the physics of the states, we experimentally propose a prototype of acoustic topological filter hosting multiple channels with independent adjustable edge states and realize the selective high transmission. Our work diversifies the prospects for the applications of the gapped edge states in the robust wave regulation, and proposes a frame to design new topological devices.
    Zhang-Zhao Yang, Jin-Heng Chen, Yao-Yin Peng, Xin-Ye Zou. Symmetry-controlled edge states in graphene-like topological sonic crystal[J]. Chinese Physics B, 2020, 29(10):
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