Electrical conductivity of bilayer-graphene double layers at finite temperature

We calculate the dielectric function of a system composed of a pair of electrically isolated Bernal graphene bilayers separated by a spacer as a function of temperature T, interlayer distance d and spacer dielectric constant ε2. Using the obtained results for dielectric function we calculate finite-temperature electrical conductivity of the first layer in presence of the second one due to the screened Coulomb scattering for different values of temperature, interlayer distance and dielectric constants ε2,ε3.