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Effects of phonons and antiferromagnetic spin fluctuations on the pairing and density of states in high-T c superconductors

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Abstract

We solve the Eliashberg equations for a two-dimensional, tight-binding band and anisotropic interaction due to exchange of phonons and antiferromagnetic spin fluctuations. For small band fillings, a mixture of simple and extendeds-wave pairing is stable, while for band fillings closer to half-filling thed-wave pairing state becomes stable. The density of statesN(ω) becomes highly asymmetric in ω for smaller band fillings, which is an effect of particle-hole asymmetry. For thed-wave stateN(ω) is linear in ω for small ω and exhibits a logarithmic singularity at the gap amplitude. For the mixeds-wave stateN(ω) shows the BCS singularity at the gap edge. Antiferromagnetic spin fluctuations give rise to a pseudogap inN(ω) for the normal state.

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References

  1. J. R. Kirtley,Int. J. Mod. Phys. B 4, 201 (1990).

    Google Scholar 

  2. M. Gurvitch, J. M. Valles, Jr., A. M. Cucolo, R. C. Dynes, J. P. Garno, L. F. Schneemeyer, and J. V. Waszczak,Phys. Rev. Lett. 63, 1008 (1989).

    Google Scholar 

  3. C. T. Rieck, D. Fay, and L. Tewordt,Phys. Rev. B 41, 7289 (1990).

    Google Scholar 

  4. P. C. Hammel, M. Takigawa, R. H. Heffner, Z. Fisk, and K. C. Ott,Phys. Rev. Lett. 63, 1992 (1989).

    Google Scholar 

  5. H. Monien and D. Pines,Phys. Rev. B 41, 6297 (1990).

    Google Scholar 

  6. A. Kampf and J. R. Schrieffer,Phys. Rev. B (to be published).

  7. L. Tewordt and Th. Wölkhausen,Solid State Commun. 70, 839 (1989).

    Google Scholar 

  8. L. Tewordt, S. Wermbter, and Th. Wölkhausen,Phys. Rev. B 40, 6878 (1989).

    Google Scholar 

  9. P. B. Allen and B. Mitrovic inSolid State Physics, Vol. 37, H. Ehrenreich, F. Seitz, and D. Turnbull, eds. (Academic Press, New York, 1982), p. 1.

    Google Scholar 

  10. D. J. Scalapino, E. Loh, and J. E. Hirsch,Phys. Rev. B 34, 8190 (1986).

    Google Scholar 

  11. K. Miyake, S. Schmitt-Rink, and C. M. Varma,Phys. Rev. B 34, 6554 (1986).

    Google Scholar 

  12. L. Tewordt,J. Low Temp. Phys. 15, 349 (1974).

    Google Scholar 

  13. H. J. Vidberg and J. W. Serene,J. Low Temp. Phys. 29, 179 (1977).

    Google Scholar 

  14. A. A. Golubov,Int. J. Mod. Phys. B 1, 837 (1988).

    Google Scholar 

  15. C. T. Rieck, D. Fay, and L. Tewordt, inProceedings of LT19, Brighton, U.K., August, 1990 (to be published).

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Authors and Affiliations

  1. Abteilung für Theoretische Festkörperphysik, Universität Hamburg, Hamburg, Germany

    S. Lenck, S. Wermbter & L. Tewordt

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  1. S. Lenck
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  2. S. Wermbter
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  3. L. Tewordt
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Lenck, S., Wermbter, S. & Tewordt, L. Effects of phonons and antiferromagnetic spin fluctuations on the pairing and density of states in high-T c superconductors. J Low Temp Phys 80, 269–283 (1990). https://doi.org/10.1007/BF00683634

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  • DOI: https://doi.org/10.1007/BF00683634

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