Fig. 5: Transport of topological exciton-polarons.
Exciton-polaron and exciton band dispersion, relative to band gap (EGap) for (a) topological and (b) trivial excitons. The lowest (next lowest) polaron energy is shown in blue (orange). A clear polaron shift is observed in both cases. c Schematic of reduced transport of exciton-polarons compared to bare excitons. d Ratio of free exciton to exciton-polaron group velocities in polypentacene at 300K for trivial (Triv.) and topological (Topo.) regimes, shown in green and red, respectively. The blue region indicates mass enhancement and slower exciton-polarons while the pink region indicates mass reduction and faster excitons.
