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Orbital topological edge states and phase transitions in one-dimensional acoustic resonator chains

Author

Listed:
  • Feng Gao

    (Huazhong University of Science and Technology)

  • Xiao Xiang

    (Huazhong University of Science and Technology)

  • Yu-Gui Peng

    (Huazhong University of Science and Technology)

  • Xiang Ni

    (Central South University
    City University of New York)

  • Qi-Li Sun

    (Huazhong University of Science and Technology)

  • Simon Yves

    (City University of New York)

  • Xue-Feng Zhu

    (Huazhong University of Science and Technology)

  • Andrea Alù

    (City University of New York
    City University of New York)

Abstract

Topological phases of matter have attracted significant attention in recent years, due to the unusual robustness of their response to defects and disorder. Various research efforts have been exploring classical and quantum topological wave phenomena in engineered materials, in which different degrees of freedom (DoFs) – for the most part based on broken crystal symmetries associated with pseudo-spins – induce synthetic gauge fields that support topological phases and unveil distinct forms of wave propagation. However, spin is not the only viable option to induce topological effects. Intrinsic orbital DoFs in spinless systems may offer a powerful alternative platform, mostly unexplored to date. Here we reveal orbital-selective wave-matter interactions in acoustic systems supporting multiple orbital DoFs, and report the experimental demonstration of disorder-immune orbital-induced topological edge states in a zigzag acoustic 1D spinless lattice. This work expands the study of topological phases based on orbitals, paving the way to explore other orbital-dependent phenomena in spinless systems.

Suggested Citation

  • Feng Gao & Xiao Xiang & Yu-Gui Peng & Xiang Ni & Qi-Li Sun & Simon Yves & Xue-Feng Zhu & Andrea Alù, 2023. "Orbital topological edge states and phase transitions in one-dimensional acoustic resonator chains," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-44042-z
    DOI: 10.1038/s41467-023-44042-z
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    References listed on IDEAS

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    1. Yu-Gui Peng & Cheng-Zhi Qin & De-Gang Zhao & Ya-Xi Shen & Xiang-Yuan Xu & Ming Bao & Han Jia & Xue-Feng Zhu, 2016. "Experimental demonstration of anomalous Floquet topological insulator for sound," Nature Communications, Nature, vol. 7(1), pages 1-8, December.
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