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- W4312224782 abstract "Distinct from the phononic valley pseudospin, the real physical spin of elastic waves adds a novel tool kit capable of envisaging the valley-spin physics of topological valley phononic crystals from a local viewpoint. Here, we report the observation of local elastic valley spin as well as the hidden elastic spin-valley locking mechanism overlooked before. We demonstrate that the selective one-way routing of valley phonon states along the topological interface can be reversed by imposing the elastic spin metasource at different interface locations with opposite valley-spin correspondence. We unveil the physical mechanism of selective directionality as the elastic spin controlled chiral coupling of valley phonon states, through both analytical theory and experimental measurement of the opposite local elastic spin density at different interface locations for different transport directions. The elastic spin of valley topological edge phonons can be extended to other topological states and offers new tool to explore topological metamaterials." @default.
- W4312224782 created "2023-01-04" @default.
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- W4312224782 date "2022-12-28" @default.
- W4312224782 modified "2023-10-17" @default.
- W4312224782 title "Elastic Valley Spin Controlled Chiral Coupling in Topological Valley Phononic Crystals" @default.
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- W4312224782 doi "https://doi.org/10.1103/physrevlett.129.275501" @default.
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