We calculate Ic(T) and Rn for both coherent and incoherent electron tunneling across a c-axis break junction between nu=s,d_x^2-y^2-wave superconducting half spaces, each with c-axis bandwidth 2J. Coherent quasiparticle tunneling only occurs for voltages V<2J/e, leading to difficulties in measuring Rn for underdoped samples. The coherent part of Ic(0) is independent of Delta_nu(0) for J/Delta_nu(0)<<1, and can be large. Our results are discussed with regard to recent experiments.
@article{arxiv.cond-mat/9805290,
title = {Coherent versus Incoherent c-Axis Josephson Tunneling Between Layered Superconductors},
author = {R. A. Klemm and G. Arnold and C. T. Rieck and K. Scharnberg},
journal= {arXiv preprint arXiv:cond-mat/9805290},
year = {2009}
}