Light-induced shift current vortex crystals in moire heterobilayers.

ABSTRACT: Transition metal dichalcogenide (TMD) moiré superlattices provide an emerging platform to explore various light-induced phenomena. Recently, the discoveries of novel moiré excitons have attracted great interest. The nonlinear optical responses of these systems are however still underexplored. Here, we report investigation of light-induced shift currents (a second-order response generating DC current from optical illumination) in the WSe₂/WS₂ moiré superlattice. We identify a striking phenomenon of the formation of shift current vortex crystals-i.e., two-dimensional periodic arrays of moiré-scale current vortices and associated magnetic fields with remarkable intensity under laboratory laser setup. Furthermore, we demonstrate high optical tunability of these current vo

SUBMITTER: Hu C 

PROVIDER: S-EPMC10741382 | biostudies-literature | 2023 Dec

REPOSITORIES: biostudies-literature