Abstract
We have examined the deviation from linearity of the temperature dependence of the electrical resistivity of a YBaCuO ceramics. We have observed at high temprature a crossover behavior toward a logarithmic temperature dependence at lower temperature. It seems relevant to attribute the origin of such a term to a pair breaking mechanism contribution, thus to give a lower bound to the existence of superconductivity fluctuations onset temperature. Our findings also implies that carriers are bosons aboveT c .
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Ausloos, M., Gillet, F., Laurent, C. et al. High temperature crossover in paraconductivity of granular Y1Ba2Cu3O7-y . Z. Physik B - Condensed Matter 84, 13–16 (1991). https://doi.org/10.1007/BF01453753
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DOI: https://doi.org/10.1007/BF01453753