Nonlinear topological solitons in mirror-symmetric triangle chains*

Topologically polarized structures support an excess of zero-modes at one boundary, thereby softening the edge where they are localized. This leads to a variety of rich phenomena underpinned by the structure's specific geometry. Here we present the mirror-symmetric triangle chain, analytically characterize its polarization phase space, and manufacture an idealized prototype through FDM to show that it can be actively reconfigured between bistable states via the propagation of a soliton. Through the introduction of additional elastic bonds, we create more realistic physical prototypes that allow for elastic wave propagation and mechano-chemical interactions. Using experiments on these prototypes in addition to molecular dynamic simulations, we explore potential applications in energy release and trapping via the programmed soliton.