Superconducting gap anisotropy and quasiparticle interactions: A doping dependent photoemission study

J. Mesot, M. R. Norman, H. Ding, M. Randeria, J. C. Campuzano, A. Paramekanti, H. M. Fretwell, A. Kaminski, T. Takeuchi, T. Yokoya, T. Sato, T. Takahashi, T. Mochiku, K. Kadowaki

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266 Citations (Scopus)

Abstract

Comparing photoemission measurements on Bi2212 with penetration depth data, we show that a description of the nodal excitations of the d-wave superconducting state in terms of noninteracting quasiparticles is inadequate, and we estimate the magnitude and doping dependence of the Landau interaction parameter which renormalizes the linear T contribution to the superfluid density. Furthermore, although consistent with d-wave symmetry, the gap with underdoping cannot be fit by the simple coskx−cosky form, which suggests an increasing importance of long range interactions as the insulator is approached.

Original languageEnglish
Pages (from-to)840-843
Number of pages4
JournalPhysical Review Letters
Volume83
Issue number4
DOIs
Publication statusPublished - Jan 1 1999
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Mesot, J., Norman, M. R., Ding, H., Randeria, M., Campuzano, J. C., Paramekanti, A., Fretwell, H. M., Kaminski, A., Takeuchi, T., Yokoya, T., Sato, T., Takahashi, T., Mochiku, T., & Kadowaki, K. (1999). Superconducting gap anisotropy and quasiparticle interactions: A doping dependent photoemission study. Physical Review Letters, 83(4), 840-843. https://doi.org/10.1103/PhysRevLett.83.840