Non-Cuprate-Planar Superconductivity (original) (raw)

2004, Journal of Superconductivity

The ruthenate compounds, Gd 2−z Ce z Sr 2 Cu 2 RuO 10 , GdSr 2 Cu 2 RuO 8 , and doped Sr 2 YRuO 6 , all superconduct in their SrO layers, which is why they have almost the same ∼49 K onset temperatures for superconductivity. The sister compound Ba 2 GdRuO 6 , either doped or not, does not superconduct, because L = 0, J = 0 Gd breaks pairs and destroys superconductivity in the potentially superconducting BaO layers. High-temperature superconductivity resides in the SrO or BaO layers, or in interstitial-oxygen regions of the crystal, not in the cuprate-planes.

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