Fluctuations Indicate Strong Interlayer Coupling in Cuprate Superconductors

J. A. Skinta; T. R. Lemberger; E. Wertz; K. Wu; Q. Li

Fluctuations Indicate Strong Interlayer Coupling in Cuprate Superconductors

Superconductivity 2007-05-23 v1

Authors: J. A. Skinta , T. R. Lemberger , E. Wertz , K. Wu , Q. Li

Abstract

From study of the Kosterlitz-Thouless-Berezinskii (KTB) transition in the superfluid density, n_s(T), of ultrathin c-axis oriented YBa_{2}Cu_{3}O_{7-\delta} (YBCO) films, we find that interlayer coupling is unexpectedly strong. The KTB transition occurs at a high temperature, as if the films were isotropic rather than quasi-two-dimensional. This result agrees with a comparison of the superfluid density of YBCO with Bi_{2}Sr_{2}CaCu_{2}O_{8} and with numerical simulations of Josephson junction arrays, and challenges the thermal phase fluctuation interpretation of critical behavior near T_c in YBCO.

Keywords

high-temperature superconductivity superconductivity thin films

Cite

@article{arxiv.cond-mat/0107406,
  title  = {Fluctuations Indicate Strong Interlayer Coupling in Cuprate Superconductors},
  author = {J. A. Skinta and T. R. Lemberger and E. Wertz and K. Wu and Q. Li},
  journal= {arXiv preprint arXiv:cond-mat/0107406},
  year   = {2007}
}

Comments

6 pages, 2 figures, submitted to Phys. Rev. Lett

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