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2008 | 114 | 1 | 143-148
Article title

Conductivity and Superconductivity in Granular Materials

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EN
Abstracts
EN
Granular metals and superconductors are very interesting materials thanks to their untypical electrical properties caused by the presence of the Coulomb effects, electron and Cooper pair tunnelling and various aspects of disorder. Most typical and widely studied representatives of this group consist of low T_c superconductor granules distributed in insulating matrix (e.g. lead in germanium matrix). In comparison with them a system of granules of high-T_c superconductors embedded in an insulating matrix is more difficult to be experimentally realised. (Bi, Pb)-Sr-Ca-Cu-O materials obtained with solid state crystallisation method may be considered as an example of granular and disordered metals and superconductors. Solid state crystallisation of initially amorphous material leads to formation of 2201 and 2212 granules embedded in the insulating or semiconducting matrix. Further annealing causes increase in size and/or the number of conducting grains and decrease in the width of the insulating barriers between them. In both cases of low- and high-T_c granular materials the main parameters, which determine their properties, are the amount of metallic phases and the tunnelling conductivity between the neighbouring grains. In this work some properties of low- and high-T_c granular materials are discussed and compared.
Keywords
EN
Publisher

Year
Volume
114
Issue
1
Pages
143-148
Physical description
Dates
published
2008-07
received
2007-11-06
Contributors
author
  • Gdańsk University of Technology, Faculty of Applied Physics and Mathematics, Narutowicza 11/12, 80-952 Gdańsk, Poland
author
  • Gdańsk University of Technology, Faculty of Applied Physics and Mathematics, Narutowicza 11/12, 80-952 Gdańsk, Poland
author
  • Gdańsk University of Technology, Faculty of Applied Physics and Mathematics, Narutowicza 11/12, 80-952 Gdańsk, Poland
author
  • Gdańsk University of Technology, Faculty of Applied Physics and Mathematics, Narutowicza 11/12, 80-952 Gdańsk, Poland
References
  • 1. B. Abeles, P. Sheng, M.D. Coutts, Y. Arie, Adv. Phys. 24, 407 (1975)
  • 2. P. Sheng, B. Abeles, Y. Arie, Phys. Rev. Lett. 31, 44 (1973)
  • 3. C.J. Adkins, J. Phys. C 1, 1253 (1989)
  • 4. I.P. Zvyagin, R. Keiper, Phys. Status Solidi B 230, 151 (2002)
  • 5. A. Gerber, A. Milner, G. Deutscher, M. Karpovsky, A. Gladkikh, Phys. Rev. Lett. 78, 4277 (1997)
  • 6. T. Chui, G. Deutscher, P. Lindenfeld, W.L. McLean, Phys. Rev. B 23, 6172 (1981)
  • 7. I.S. Belobrodov, A.V. Lopatin, V.M. Vinokur, K.B. Efetov, Rev. Mod. Phys. 79, 469 (2007)
  • 8. J. Gackowska, M. Gazda, K. Trzebiatowski, B. Kusz, J. Non-Cryst. Solids 352, 4242 (2006)
  • 9. P.A. Lee, T.V. Ramakrishnan, Rev. Mod. Phys. 57, 287 (1985)
  • 10. G. Deutscher, in: Connectivity and Superconductivity in Inhomogeneous Structures, Eds. J. Berger, J. Rubinstein, LNP m62, p. 248, Springer-Verlag, 2000
  • 11. B. Abeles, Phys. Rev. B 15, 2828 (1977)
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv114n119kz
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