1999/02/19 by R. A. Klemm, Klemm, R. A., C. T. Rieck +3
Physics and Astronomy · #FOS: Physical sciences #Superconductivity (cond-mat.supr-con) #cond-mat.supr-con
paper · pdf · doi:10.48550/arxiv.cond-mat/9902271
3 pages, 4 figures, Invited talk to be published in AIP Proceedings of the University of Miami Conference on High Temperature Superconductivity (HTS99), Jan. 7-13, 1999, edited by S. E. Barnes
arxiv created 1999/02/19 · arxiv updated 2009/11/30
Li et al. found that the critical current density JcJ across atomically clean c-axis twist junctions of Bi2Sr2CaCu2O(8+x) is the same as that of the constituent single crystal, JcS, independent of the twist angle phi0, even at Tc. We investigated theoretically if a dx2-y2-wave order parameter might twist by mixing in dxy components, but find that such twisting cannot possibly explain the data near to Tc. Hence, the order parameter contains an s-wave component, but not any dx2-y2-wave component. In addition, the c-axis Josephson tunneling is completely incoherent. We also propose a c-axis junction tricrystal experiment which does not rely upon expensive substrates.