Intrinsic c-axis tunnelling in the superconducting state has been measured in zero and finite fields in small mesa structures fabricated on the surface of 2212-BSCCO single crystals. The temperature dependence of the zero-field critical current and quasi-particle conductance is related to microscopic d-wave models in the presence of impurity scattering. The strong field dependence of the c-axis critical current provides information on the correlation of flux pancakes across adjacent superconducting bi-layers. An instability in the IV characteristics is observed below 20K, which accounts for the apparent drop in critical current at low temperatures previously reported.
@article{arxiv.cond-mat/0002246,
title = {Quasiparticle Tunnelling and Field-Dependent Critical Current in 2212-BSCCO},
author = {C. E. Gough and P. J. Thomas and J. C. Fenton and G. Yang},
journal= {arXiv preprint arXiv:cond-mat/0002246},
year = {2009}
}
Comments
4 pages, 6 figures. submitted to Proceedings of M2S-HTSC-VI