Abstract
An array of Josephson tunnel junctions is studied as a model for granular superconductors. We determine the critical line in the (H, T)-plane, separating the phase-coherent and incoherent region as a function of the magnetic field. Both positional disorder and junction-dilution are treated. Approaching the percolation threshold from above, the critical exponent of the upper critical field is found to be 0.60±0.03.
Similar content being viewed by others
References
Shih, W.Y., Stroud, D.: Phys. Rev. B28, 6575 (1983); Shih, W.Y., Ebner, C., Stroud, D.: Phys. Rev. B30, 134 (1984)
John, S., Lubensky, T.C.: Phys. Rev. B34, 4815 (1986)
Schneider, T., Würtz, D., Hetzel, R.: Z. Physik B-Condensed Matter (to be published)
Vinokur, V.M., Ioffe, L.B., Larkin, A.I., Feigelman, M.V.: Sov. Phys. JETP66, 198 (1987)
Teitel, S., Jayaprakash, C.: Phys. Rev. B27, 598 (1983); Chakrabarti, A., Dasgupta, C.: Phys. Rev. B37, 7557 (1988)
Morgenstern, I., Müller, K.A., Bednorz, J.G.: Z. Phys. B-Condensed Matter69, 33 (1987)
Müller, K.A., Takashige, M., Bednorz, J.G.: Phys. Rev. Lett.58, 1143 (1987)
Deutscher, G., Müller, K.A.: Phys. Rev. Lett.59, 1745 (1987)
Deutscher, G., Grave, I., Alexander, S.: Phys. Rev. Lett.48, 1497 (1982)
Rammal, R., Lubensky, T.C., Toulouse, G.: J. Phys. (Paris) Lett.44, L-65 (1983)
Choi, M., Doniach S.: Phys. Rev. B31, 4516 (1985)
Hofstadter, D.R.: Phys. Rev. B14, 2239 (1976)
Deutscher, G., Rappoport, M., Ovadyahu, Z.: Solid State Commun.28, 593 (1978)
Gennes, P.G. de: C.R. Acad. Sci. B292, 9 (1981); Fink, H.J., Lopez, A., Maynard, R.: Phys. Rev. B26, 5237 (1982); Alexander, S.: Phys. Rev. B27, 1541 (1983)
Simonin, J., Lopez, A.: Phys. Rev. Lett.56, 2649 (1986)
Roux, S., Hansen, A.: Europhys. Lett.5, 473 (1988)
Bowman, D.R., Stroud, D.: Phys. Rev. Lett.52, 299 (1984)
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Hetzel, R., Schneider, T. Percolating granular superconductor in a magnetic field. Z. Physik B - Condensed Matter 73, 303–307 (1988). https://doi.org/10.1007/BF01314267
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF01314267