Superconducting carrier concentration dependence

Not only may all of these be wrong in our picture of Ca-123. The assumption of linear dependence of O content on Ca% is also wrong (sect. 8.1). Up to 17% Ca very little oxygen is lost, not supporting the classical picture of substitution, except if the Ca holes are not available to the lattice. And last but not least, Ca-12306 which has been used to support the adoption of the parabolic dependence of Tc on the carrier concentration for 123 (Tallon et al. 1995) is not superconducting 1230e doped with 5 different Ca compositions (0-22%) was found not to be superconducting (fig. 51) as discussed in sect. 8.4 (Merz et al. 1998). 

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