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c-axis transport and phenomenology of the pseudo-gap state in $Bi_2Sr_2CaCu_2O_{8+δ}$

M. Giura·R. Fastampa·S. Sarti·E. Silva
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Abstract

We measure and analyze the resistivity of $Bi_2Sr_2CaCu_2O_{8+δ}$ crystals for different doping $δ$. We obtain the fraction of carrier $η(T,δ) = n_g/n_{TOT}$ that do not participate to the c-axis conductivity. All the curves $η(T,δ)$ collapse onto a universal curve when plotted against a reduced temperature $x=[T-Θ(δ)]/Δ^{*}(δ)$. We find that at the superconducting transition $n_g$ is doping independent. We also show that a magnetic field up to 14 T does not affect the degree of localization in the (a,b) planes but widens the temperature range of the x-scaling by suppressing the superconducting phase coherence.

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M. Giura, R. Fastampa, S. Sarti, E. Silva. 2004-07-15. c-axis transport and phenomenology of the pseudo-gap state in $Bi_2Sr_2CaCu_2O_{8+δ}$. https://doi.org/10.1103/physrevb.70.214530

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