Skip to main content
Log in

Critical temperature of two-band superconductors with paramagnetic impurities

  • Published:
Journal of Low Temperature Physics Aims and scope Submit manuscript

The two-band model proposed by Suhl, Matthias, and Walker for pure transition metal superconductors is extended to transition metals with paramagnetic impurities under the assumption that the cutoff parameters Ω ij (i, j = s, d) of the pairing interactions between electrons V ij are different from each other. An equation is derived for the critical temperature T c .In the dilute limit T c (n) can increase with impurity concentration n only for Ω ss ≠ Ω sd , Ω dd ≠ Ω sd . In the one-band limit the results reduce to those of Abrikosov and Gor' kov. The theoretical function T c (n) is used to fit the experimental data for the alloys La 1 − n Ce n and Ce 1 − n Nd n Ru2. The agreement of the theoretical T c (n) curve with the experimental points is good, with the exception of La 1 − n Ce n for values n near the critical concentration n c ,where stronger deviations appear as a consequence of magnetic ordering.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. H. Suhl, B. T. Matthias, and L. R. Walker, Phys. Rev. Lett. 3, 552 (1959).

    Google Scholar 

  2. W. S. Chow, Phys. Rev. 172, 467 (1968).

    Google Scholar 

  3. V. A. Moskalenko and M. E. Palistrant, Zh. Eksp. Teor. Fiz. 49, 770 (1965).

    Google Scholar 

  4. V. A. Moskalenko and L. S. Kon, Zh. Eksp. Teor. Fiz. 50, 724 (1966).

    Google Scholar 

  5. R. H. Burkel and W. S. Chow, Phys. Rev. B 3, 779 (1971).

    Google Scholar 

  6. P. Kumar and S. N. Gupta, Phys. Rev. B 6, 2642 (1972).

  7. T. Kusakabe, Prog. Theor. Phys. 43, 907 (1970).

    Google Scholar 

  8. A. A. Abrikosov and L. P. Gor'kov, Zh. Eksp. Teor. Fiz. 39, 1781 (1960).

    Google Scholar 

  9. E. Müller-Hartmann and J. Zittarz, Phys. Rev. Lett. 26, 428 (1971).

    Google Scholar 

  10. E. Umlauf, J. Schneider, R. Meier, and H. Kreuzer, J. Low Temp. Phys. 5, 191 (1971).

    Google Scholar 

  11. V. Z. Kresin, J. Low Temp. Phys. 5, 565 (1971).

    Google Scholar 

  12. D. A. Kirzhnitz, E. G. Maksimov, and D. I. Khomskii, J. Low Temp. Phys. 10, 79 (1973).

    Google Scholar 

  13. H. W. Myron and S. H. Liu, Phys. Rev. B 1, 2414 (1970).

    Google Scholar 

  14. D. Rainer, Z. Physik 252, 174 (1972).

    Google Scholar 

  15. M. Wilhelm, B. Hillenbrand, Physica 55, 608 (1971).

    Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Rights and permissions

Reprints and permissions

About this article

Cite this article

Will, P., Brusberg, M. Critical temperature of two-band superconductors with paramagnetic impurities. J Low Temp Phys 18, 169–181 (1975). https://doi.org/10.1007/BF00116978

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF00116978

Keywords

Navigation