Dimensional crossovers in the Gaussian critical fluctuations above T c of two-layer and three-layer superconductors

Article Highlights We study superconductors composed of a few parallel layers, in the Gaussian-Ginzburg-Landau approach above their critical temperature. We calculate the heat capacity, susceptibility and conductivity induced by critical thermal fluctuations, mainly for bi- and tri-layers. We obtain dimensional crossovers in the critical behaviors and compare them with the ones in infinite-layers superconductors.