Fluctuations Indicate Strong Interlayer Coupling in Cuprate Superconductors
超导电性
2007-05-23 v1
摘要
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.
引用
@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}
}
备注
6 pages, 2 figures, submitted to Phys. Rev. Lett