Extended paraconductivity regime in underdoped cuprates

Abstract

We reconsider transport experiments in strongly anisotropic superconducting cuprates and we find that universal Aslamazov-Larkin (AL) paraconductivity in two dimensions is surprisingly robust even in the underdoped regime below the pseudogap crossover temperature T^*. We also establish that the underlying normal state resistivity in the pseudogap phase is (almost) linear in temperature, with all the deviations being quantitatively accounted by AL paraconductivity. The disappearence of paraconductivity is governed by the disappearence of gaussian pair fluctuations at an energy scale related to T^*.

arXiv comment5 pages and 2 figures

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• Confinement of superconducting fluctuations due to emergent electronic inhomogeneities
• Percolative nature of the dc paraconductivity in the cuprate superconductors
• Theory of fluctuation conductivity from interband pairing in pnictide superconductors
• Protected superconductivity at the boundaries of charge-density-wave domains
• Doping-dependent competition between superconductivity and polycrystalline charge density waves
• The conductivity and the magnetization around Tc in optimally-doped YBa${}_2$Cu${}_3$O${}_{7-\delta }$ revisited: quantitative analysis in terms of fluctuating superconducting pairs
• Comment on "High Field Studies of Superconducting Fluctuations in High-Tc Cuprates. Evidence for a Small Gap distinct from the Large Pseudogap"
• Effect of the Anomalous Diffusion of Fluctuating Cooper Pairs in the Density of States of Superconducting NbN Thin Films
• On the dilemma between percolation processes and fluctuating pairs as the origin of the enhanced conductivity above the superconducting transition in cuprates
• Boltzmann equation for fluctuation Cooper pairs in Lawrence-Doniach model. Possible out-of-plane negative differential conductivity