Europhys. Lett.
Volume 48, Number 1, October 1999
Page(s) 73 - 78
Section Condensed matter: electronic structure, electrical, magnetic and optical properties
Published online 01 September 2002
DOI: 10.1209/epl/i1999-00116-1

Europhys. Lett, 48 (1), pp. 73-78 (1999)

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

A. Pimenov 1, A. Loidl 1, B. Schey 1, B. Stritzker 1, G. Jakob 2, H. Adrian 2
A. V. Pronin 3 and Yu. G. Goncharov 3

1 Institut für Physik, Universität Augsburg - 86135 Augsburg, Germany
2 Institut für Physik, Universität Mainz - 55099 Mainz, Germany
3 Institute of General Physics, Russian Academy of Sciences - 117942 Moscow, Russia

(received 30 April 1999; accepted in final form 26 July 1999)

PACS. 74.25-q - General properties; correlations between physical properties in normal and superconducting states.
PACS. 74.25Fy - Transport properties (electric and thermal conductivity, thermoelectric effects, etc.).
PACS. 74.76Bz - High-$T_{\rm c}$ films.


The absolute values of the conductivity in the normal state $\sigma _{\rm n}$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 $\sigma _{\rm n}$ and $\lambda ^{-2}\,$ 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.


Copyright EDP Sciences