Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/154618
Title: Vortex states in an acoustic Weyl crystal with a topological lattice defect
Authors: Wang, Qiang
Ge, Yong
Sun, Hong-Xiang
Xue, Haoran
Jia, Ding
Guan, Yi-Jun
Yuan, Shou-Qi
Zhang, Baile
Chong, Yidong
Keywords: Science::Physics::Acoustics
Issue Date: 2021
Source: Wang, Q., Ge, Y., Sun, H., Xue, H., Jia, D., Guan, Y., Yuan, S., Zhang, B. & Chong, Y. (2021). Vortex states in an acoustic Weyl crystal with a topological lattice defect. Nature Communications, 12(1), 3654-. https://dx.doi.org/10.1038/s41467-021-23963-7
Project: MOE2016-T3-1-006 
RG187/18 
MOE2019-T2-2-085 
Journal: Nature Communications 
Abstract: Crystalline materials can host topological lattice defects that are robust against local deformations, and such defects can interact in interesting ways with the topological features of the underlying band structure. We design and implement a three dimensional acoustic Weyl metamaterial hosting robust modes bound to a one-dimensional topological lattice defect. The modes are related to topological features of the bulk bands, and carry nonzero orbital angular momentum locked to the direction of propagation. They span a range of axial wavenumbers defined by the projections of two bulk Weyl points to a one-dimensional subspace, in a manner analogous to the formation of Fermi arc surface states. We use acoustic experiments to probe their dispersion relation, orbital angular momentum locked waveguiding, and ability to emit acoustic vortices into free space. These results point to new possibilities for creating and exploiting topological modes in three-dimensional structures through the interplay between band topology in momentum space and topological lattice defects in real space.
URI: https://hdl.handle.net/10356/154618
ISSN: 2041-1723
DOI: 10.1038/s41467-021-23963-7
DOI (Related Dataset): 10.21979/N9/THY532
Rights: © 2021 The Author(s). This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/ licenses/by/4.0/.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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