Abstract
Effects of short-wavelength cutoffs on the c-axis (out-of-plane) fluctuation conductivity σ c ′ in a layered superconductor are studied for Aslamazov–Larkin (AL), Maki–Thompson (MT) and density of states (DOS) terms. A theoretical equation for σ c ′ 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 σ c ′ 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 σ c ′ 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 σ c ′ .
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