SNU Transformative ARchitecture Lab

Publication

Journal

Topological transition in spiral elastic valley metamaterials
Authors

S. Li, J. Yang* 

Journal
Physical Review Applied
Vol
15: 014058
Year
2021
Elastic valley metamaterials offer an excellent platform to manipulate elastic waves and have potential applications in energy harvesting and elastography. Here we introduce a series of strategies to realize a topological transition in spiral elastic valley metamaterials by parameter modulations. We show the evolution of the Berry curvature and valley Chern number as a function of inherent parameters of a spiral, which further results in a general scheme to achieve topological valley edge states. Our strategy leverages multiple degrees of freedom in spiral elastic valley metamaterials to provide enhanced opportunities for desired topological states.