Valley-selective Floquet Chern flat bands in twisted multilayer graphene
Valley-selective Floquet Chern flat bands in twisted multilayer graphene
We show that Floquet engineering with circularly polarized light (CPL) can selectively split the valley degeneracy of a twisted multilayer graphene (TMG), and thus generate a controlled valley-polarized Floquet Chern flat band with tunable large Chern number. It offers a feasible optical way to manipulate the valley degree of freedom …