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Universal relationship between the penetration depth and the normal-state conductivity in YBaCuO

A. Pimenov·A. Loidl·B. Schey·B. Stritzker·G. Jakob·H. Adrian·A. V. Pronin·Yu. G. Goncharov
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Abstract

The absolute values of the conductivity in the normal state sigma_n and of the low temperature penetration depths lambda(0) were measured for a number of different samples of the YBaCuO family. We found a striking correlation between sigma_n and 1/lambda^2, regardless of doping, oxygen reduction or defects, thus providing a simple method to predict the superconducting penetration depth and to have an estimate of the sample quality by measuring the normal-state conductivity.

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A. Pimenov, A. Loidl, B. Schey, B. Stritzker, G. Jakob, H. Adrian, A. V. Pronin, Yu. G. Goncharov. 1999-08-26. Universal relationship between the penetration depth and the normal-state conductivity in YBaCuO. https://doi.org/10.1209/epl%2Fi1999-00116-1

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