An investigation on the plasmonic behavior of Coulomb coupled heterostructure of silicene and graphene.*

Extensive research on the study of plasmonic behavior of a combination of graphene and silicene layers is done. The analytical formulation for the surface response function is first carried out for a general structure which then is numerically evaluated for several combinations of two-dimensional layers and substrates. This laid the foundation for the calculation of the plasmonic mode of the given heterostructure. The obtained expression is used for numerical computation of plasmonic nature for various combinations. The results are presented numerically and interpreted physically. In addition, the rate of decay of the plasmon for different structures is calculated and interpreted physically. Overall the effect of adding the substrate and the role of a variety of 2D layers heterostructure are analyzed.