Fig. 2
From: Percolative nature of the direct-current paraconductivity in cuprate superconductors
DC paraconductivity for underdoped Hg1201 (Tc ≈ 80 K; circles), obtained by subtracting Fermi-liquid normal-state behavior from the measured resistivity, compared to the paraconductivity of underdoped YBCO (Tc = 47 K; squares) and LSCO (Tc = 28 K, Sr doping level x = 0.1; diamonds) obtained by analyzing the data from ref. 52 following the same procedure as for Hg1201 (see text, Supplementary Information, and Fig. S2). The paraconductivity exhibits strong exponential-like temperature dependence with a universal slope. The full line is the prediction of the superconducting percolation model obtained with effective-medium theory from a direct comparison with the Hg1201 data. The dot dashed line indicates quasi-two-dimensional Gaussian Aslamazov–Larkin (AL) fluctuation paraconductivity (see text)
