Reconfigurable Floquet elastodynamic topological insulator based on synthetic angular momentum bias.

ABSTRACT: Originating with the discovery of the quantum Hall effect (QHE) in condensed matter physics, topological order has been receiving increased attention also for classical wave phenomena. Topological protection enables efficient and robust signal transport; mechanical topological insulators (TIs), in particular, are easy to fabricate and exhibit interfacial wave transport with minimal dissipation, even in the presence of sharp edges, defects, or disorder. Here, we report the experimental demonstration of a phononic crystal Floquet TI (FTI). Hexagonal arrays of circular piezoelectric disks bonded to a PLA substrate, shunted through negative electrical capacitance, and manipulated by external integrated circuits, provide the required spatiotemporal modulation scheme to break time-reversal symme

SUBMITTER: Darabi A 

PROVIDER: S-EPMC7439512 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature