Journal of Superconductivity

, Volume 8, Issue 1, pp 9–10 | Cite as

A possible explanation for the isotope effect in high-T c and Rb3C60 superconductors

  • P. Singh
  • R. Kishore
Article
Received:

Abstract

The role of pair breaking effects on the isotope effect coefficient is investigated using the generalized Abrikosov and Gorkov theory of superconductors. It is found that the pair breaking effects enhance the isotope effect coefficient. This provides a plausible explanation for the enhancement of the isotope effect coefficient as a function of impurity concentration in yttrium-, europium-, and lanthanum-based high-Tc superconductors. It may also explain the very large value of the isotope effect coefficient in Rb3C60 superconductors provided some intrinsic disorder is assumed.

Key words

Isotope effect superconductivity fullerenes oxide superconductors 
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References

  1. 1.
    H. Frohlich,Phys. Rev. 79, 845 (1950).Google Scholar
  2. 2.
    E. Maxvell,Phys. Rev. 78, 477 (1950); C. A. Reynoldset al., Phys. Rev. 78, 487 (1950).Google Scholar
  3. 3.
    J. Bardeen, L. N. Cooper, and J. R. Schrieffer,Phys. Rev. 108, 1175 (1957).Google Scholar
  4. 4.
    P. B. Allen and R. C. Dynes,Phys. Rev. B 12, 905 (1975); P. Singh,Praman J. Phys. 29, L523 (1987).Google Scholar
  5. 5.
    B. Batloget al., Phys. Rev. Lett. 58, 2333 (1987);ibid.,59, 912 (1987); M. Gurvitchet al., Physica C 153–155, 1369 (1988); J. P. Franket al., ibid.,164, 753 (1989);ibid.,185–189, 1379 (1991).Google Scholar
  6. 6.
    J. P. Carbotte,Rev. Mod. Phys. 62, 1127 (1990).Google Scholar
  7. 7.
    T. W. Ebbesenet al., Nature (London) 355, 620 (1992).Google Scholar
  8. 8.
    T. Galbaataret al., Physica C 185-189, 1529 (1991).Google Scholar
  9. 9.
    E. Schachingeret al., Phys. Rev. B 42, 406 (1990).Google Scholar
  10. 10.
    J. P. Carbotte, M. Greenson, and M. Perez-Gonzalez,Phys. Rev. Lett. 66, 1789 (1991).Google Scholar
  11. 11.
    A. A. Abrikosov and L. P. Gorkov,Sov. Phys. JETP 12, 1243 (1961).Google Scholar
  12. 12.
    P. Hohenberg,Sov. Phys. JETP 18, 834 (1964); V. A. Moskalenkoet al., Sov. Phys. Usp. 34, 717 (1991).Google Scholar
  13. 13.
    B. I. Belevtsev,Sov. Phys. Usp. 33, 36 (1991).Google Scholar

Copyright information

© Plenum Publishing Corporation 1995

Authors and Affiliations

  • P. Singh
    • 1
  • R. Kishore
    • 2
  1. 1.Instituto Nacional de Pesquisas Espaciais-INPES. J. Campos, S.P.Brazil
  2. 2.Physics DepartmentG. B. Pant UniversityPantnagarIndia

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