Effects of Angle and Distance of Graphene Layers on Twistronic

In the context of a moiré platform with strongly interacting topological bands, the ability to manipulate the electronic properties of the materials is of utmost importance. This study specifically focuses on investigating the impact of the angle and distance between graphene layers in the Twistronic topology in cylindrical and cartesian coordinates. Initially, misalignment and offset effects in cloaking scatterers with graphene in cylindrical coordinates with and without cloak effects are investigated. The results present the change of scattering characteristics of bilayer graphene by applying a small angle twist and offset between the layers. Then rotation and gap effects in graphene metamaterial perfect absorber in Cartesian coordinates are investigated, and the calculated conductivity and absorbance of the graphene sheet are analyzed. These results illustrate the real and imaginary components of several Fermi energies. Notably, the intraband transition gives rise to a Drude-like response reminiscent of that observed in typical metals. As demonstrated by the increase of offsets and misalignment, the scattering cross section increased, and the optimal point was moved to lower frequencies. The results present the increase of absorbance characteristics of bilayer graphene by applying a small angle rotation and the gap between layers. The obtained findings can be utilized to determine the most suitable twistronic angle for a bilayer graphene system.