Real-Space Hybrid Topological Singularities in Structured Elastic Waves.

Authors

Tong Fu, Pengfei Zhao, Liyou Luo, Zhiling Zhou, Dong Liu, Wanyue Xiao, Jensen Li, Shubo Wang

Published in

Physical review letters. Volume 137. Issue 14. Pages 146604. Oct 02, 2026.

Abstract

Real-space singularities govern a broad spectrum of wave phenomena, yet they remain largely unexplored in elastic wave systems. Here, we report hybrid topological singularities that emerge on the surfaces of finite-sized solids due to the full vectorial character of elastic waves. These textures fuse spin-field singularities with displacement-field singularities and exhibit unique nonpairwise topological charge dynamics. Moreover, a subset of these singularities imprint dislocation lines onto the radiated acoustic field, generating robust acoustic vortices in free space from an otherwise achiral source and structure. Our results establish elastic waves as a powerful platform for engineering real-space singularities and open avenues for singular phononics and the exploration of rich topological defects in elastic media.

PMID:
42886936
Bibliographic data and abstract were imported from PubMed on 17 Oct 2026.

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