Abstract
We studied theoretically the phase-sensitive c-axis Bi2Sr2CaCu2O8+δ (BSCCO) bicrystal twist Josephson junction experiments of Li et al. (Phys. Rev. Lett. 83, 4160 (1999)), calculating the critical current as a function of the twist angle in a wide variety of models. The data provide strong evidence that the c-axis tunneling in BSCCO is incoherent, and that the order parameter is s-wave for T ≤ T c.
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Klemm, R.A. Theory of the Phase-Sensitive Bi2Sr2CaCu2O8+δ c-Axis Twist Josephson Junction Experiments. Journal of Superconductivity 16, 529–532 (2003). https://doi.org/10.1023/A:1023825205470
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DOI: https://doi.org/10.1023/A:1023825205470