Homogeneous and fractal behavior of superconducting fluctuations in the electrical resistivity of granular ceramic superconductors

Ausloos, Marcel; Clippe, Paulette; Laurent, Christian

doi:10.1103/PhysRevB.41.9506

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Homogeneous and fractal behavior of superconducting fluctuations in the electrical resistivity of granular ceramic superconductors

Ausloos, Marcel; Clippe, Paulette; Laurent, Christian

1990 • In Physical Review. B, Condensed Matter, 41 (13), p. 9506-9509

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https://hdl.handle.net/2268/131158

DOI
10.1103/PhysRevB.41.9506

PubMed
9993299

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Abstract :

[en] Experimental data show that the electrical-resistivity temperature derivative diverges in a different manner in the granular ceramic superconductors YBa2Cu3O7-y and Bi1.75Pb0.25Ca2Sr2Cu3O10-y. Critical exponents are extracted and explained. The dimensionality of anomalous superconductivity fluctuations is deduced. A homogeneous case and a self-similar (fractal) behavior can occur and are found. They correspond to different values of the superconductivity s and some percolation p coherence-length ratio. The results indicate that superconductivity percolation is achieved through surface connection rather than through path connection.

Disciplines :

Physics

Author, co-author :

Ausloos, Marcel ; Université de Liège - ULiège > Département de physique > Département de physique

Clippe, Paulette ; Université de Liège - ULiège > Département de physique > Physique statistique appliquée et des matériaux

Laurent, Christian; Université de Liège - ULiège > Institut Montefiore, B28 > SUPRAS

Language :

English

Title :

Homogeneous and fractal behavior of superconducting fluctuations in the electrical resistivity of granular ceramic superconductors

Publication date :

1990

Journal title :

Physical Review. B, Condensed Matter

ISSN :

0163-1829

eISSN :

1095-3795

Publisher :

American Physical Society, United States - Maryland

Volume :

Issue :

Pages :

9506-9509

Peer reviewed :

Peer Reviewed verified by ORBi

Available on ORBi :

since 25 September 2012

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