Hello,

There are few standards to calculate permittivity of graphene. Graphene is a 2D material with very particular dielectric properties. For different wave ranges and different doping dielectric permittivity (depends on frequency) can be negative (i.e. graphene behaves itself like a metal) or positive (i.e dielectric) with low damping (2.3%). The dielectric permittivity can be calculated from conductivity through relation ε = 1 +i*σ/(δωε0), where δ is a thickness of the graphene layer. Conductivity σ is calculated using random phase approximation and final formula can be found in a lot of sources. use this method to calculate permittivity or other important parameters.

Thanks,

Thanks you very much for opening the area of discussion.You are requested to provide any article for the same.