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- W2964495544 abstract "Inspired by the quantum valley Hall effect, a mechanical topological insulator (TI) purposely built for reconfigurability is proposed and experimentally demonstrated. An aluminum plate serves as the host medium with periodically arranged voids and fixed inclusions used to break mirror symmetry. Reconfigurability is derived from the ability to easily alter the imperfection type (void or fixed inclusion) in any unit cell. The corresponding band structure of the proposed hexagonal unit cell is obtained using numerical means, which documents double-folded Dirac cones at the K-points. The breaking of mirror symmetry results in a topologically protected bandgap. Furthermore, topologically protected edge states (TPES) at the interface of two structures with opposite Chern numbers have been demonstrated numerically, and verified experimentally, for different desired trajectories. These TPES are robust against backscattering at defect locations and sharp bends. The proposed reconfigurable TI can be a stepping-stone platform toward building mechanical logic and circuits, which have advantages over electronic equivalents in harsh operating conditions, or to replace wireless systems near dead-zones of metallic and carbon fiber structures." @default.
- W2964495544 created "2019-08-13" @default.
- W2964495544 creator A5065456052 @default.
- W2964495544 creator A5070275027 @default.
- W2964495544 date "2019-07-01" @default.
- W2964495544 modified "2023-09-30" @default.
- W2964495544 title "Reconfigurable topological insulator for elastic waves" @default.
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- W2964495544 doi "https://doi.org/10.1121/1.5114920" @default.
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- W2964495544 hasPublicationYear "2019" @default.
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