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Showing 1–9 of 9 results
Advanced filters: Author: Shou-Qi Yuan Clear advanced filters

  • Non-Hermitian skin effect fundamentally challenges the conventional topological description of a system. Here the authors demonstrate a bipolar non-Hermitian skin effect, where bulk eigenstates localize towards two directions, in a one-dimensional non-reciprocal acoustic crystal with twisted topology.

    • Li Zhang
    • Yihao Yang
    • Baile Zhang
    ResearchOpen Access
    Nature Communications
    Volume: 12, P: 1-7

  • The concept of topological corner states in two dimensional topological insulators can be generalised to higher dimensions. Here, authors present a three dimensional acoustic metamaterial that exhibits the full hierarchy of topological multipole states including corner, hinge, surface and bulk states.

    • Haoran Xue
    • Yong Ge
    • Baile Zhang
    ResearchOpen Access
    Nature Communications
    Volume: 11, P: 1-6

  • Here, the authors report on the experimental observation of a twofold symmetry enforced topological nodal surface in a 3D chiral acoustic crystal. The demonstrated nodal surface carries a topological charge of 2, constituting the first realization of higher-dimensional topologically-charged band degeneracy.

    • Yihao Yang
    • Jian-ping Xia
    • Baile Zhang
    ResearchOpen Access
    Nature Communications
    Volume: 10, P: 1-7

  • In acoustic metamaterials, unconventional chiral quasiparticles exhibit multifold band degeneracy points, each carrying non-zero topological charges, giving rise to the topologically protected negative surface refraction.

    • Yihao Yang
    • Hong-xiang Sun
    • Baile Zhang
    Research
    Nature Physics
    Volume: 15, P: 645-649

  • Artificial magnetic fields have been meticulously engineered in a 3D acoustic crystal, facilitating the creation of 3D flat bands through Landau quantization of quasiparticles arising from nodal-ring band degeneracies.

    • Zheyu Cheng
    • Yi-Jun Guan
    • Baile Zhang
    ResearchOpen Access
    Nature Communications
    Volume: 15, P: 1-8

  • Vortex string, hypothetical topological defects in cosmology, are predicted to support massless chiral modes. The authors successfully mimicked vortex-string physics in a metamaterial system and experimentally observed the chiral modes within it.

    • Jingwen Ma
    • Ding Jia
    • Xiang Zhang
    ResearchOpen Access
    Nature Communications
    Volume: 15, P: 1-7

  • Here, the authors introduce a 3D Weyl metamaterial hosting modes bound to a 1D topological lattice defect. The modes carry nonzero orbital angular momentum locked to the direction of propagation, and they experimentally demonstrate the ability to emit acoustic vortices into free space.

    • Qiang Wang
    • Yong Ge
    • Y. D. Chong
    ResearchOpen Access
    Nature Communications
    Volume: 12, P: 1-8