Theoretical characterization of c-axis paraconductivity in short-wavelength fluctuation region

Effects of short-wavelength cutoffs on the c-axis (out-of-plane) fluctuation conductivity σc′ in a layered superconductor are studied for Aslamazov-Larkin (AL), Maki-Thompson (MT) and density of states (DOS) terms. A theoretical equation for σc′ in each term is derived under two types of the cutoff conditions: a momentum cutoff (MC) and a total-energy cutoff (EC) in the fluctuation spectrum. The MC effect provides appreciable contributions to σc′ of the MT and DOS terms as in the case of the AL term. On the other hand, the EC effect plays no explicit role in σc′ as far as anomalous and regular MT terms are concerned. Difference between MC and EC effects is numerically presented and our results are compared to experiments on σc′.