Temperature dependences of the specific resistance of optimally doped CdBa2Cu3O7−δ: (1) first measurement (T min1 = 275 K); (2) a measurement after 72 h (T min2 = 252 K); (3) a curve without minima measured after another 24 h. In all cases Tc = 86.6 K.
(a) Δσ−2 as a function of temperature for the first (▪) and second (●) minima. The smooth lines are extrapolations of the 3D region with the intersection of the temperature axis determining . (b) as a function of for the first (▪) and second (●) minima. The straight lines correspond to the AL theory for 3D (λ = −1/2) and 2D (λ = −1) fluctuations.
The specific resistivity of optimally doped CdBa2Cu3O7−δ as a function of temperature. The smooth line is an extrapolation of the dependence .
The logarithm of the excess conductivity as a function of temperature. The smooth curve is a fit to the experimental data using Eq. (8) .
(a) Temperature dependences of for the main superconducting transition. The smooth line is the extrapolation of the 3D region whose intercept with the temperature axis determines . (b) as a function of . The straight lines are the AL theory for 3D (λ = −1/2) and 2D (λ = −1) fluctuations. The arrow indicates the crossover temperature.
Temperature dependence of the pseudogap Δ* in optimally doped CdBa2Cu3O7−δ.
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