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EPL Association, European Physical Society Letters, 1(48), p. 73-78

DOI: 10.1209/epl/i1999-00116-1

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

Journal article published in 1999 by A. Pimenov, A. Loidl ORCID, B. Schey, B. Stritzker, Gerhard Jakob ORCID, Hermann Adrian, A. V. Pronin, Y.-U. G. Goncharov
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This paper is available in a repository.

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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. Comment: 7 pages, 1 figure, Europhys. Lett., accepted