Abstract
Evidence is presented that high-temperature superconductivity does not necessarily originate in the cuprate-planes. In the cuprates such as YBa2Cu3O7, i is argued that the superconductivity resides in the BaO layers. This superconductivity is s-wave, not d-wave, in the bulk. The trio of ruthenate compounds, Cu-doped Sr2YRuO6, GdSr2Cu2RuO8, and Gd2−zCezSr2Cu2RuO10 all super conduct in their SrO layers, which is why they have almost the same ∼45 K onset temperatures for superconductivity. Ba2GdRuO6, whether doped or not, does not superconduct, because the Gd breaks Cooper-like pairs. Bi2Sr2CaCu2O8 YBa2Cu3O7, Nd2−zCezCuO4 homologues, and the Pb2Sr2(RE)1−xCaxCu3O8 compounds that superconduct (where RE is a rare-earth) are all s-wave, p-type superconductors.
Keywords
- Theories and models of the superconducting state
- Type II superconductivity
- High-Tc compounds
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Dow, J.D., Harshman, D.R. (2005). High-Temperature Superconductivity of Oxides. In: Ashkenazi, J., et al. New Challenges in Superconductivity: Experimental Advances and Emerging Theories. NATO Science Series II: Mathematics, Physics and Chemistry, vol 183. Springer, Dordrecht. https://doi.org/10.1007/1-4020-3085-1_21
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DOI: https://doi.org/10.1007/1-4020-3085-1_21
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