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Comment Details missing (Score 1) 96

This news is quite strange. As far as I know sapphire itself is NEVER a superconductor at any temperature. The superconductivity might just come from the "specialized ceramic coating" that is mentioned, since the LN2 temperature superconductors are usually ceramics, so called "high temperature superconductor". The problem of such material is that it is quite brittle and you can never draw a wire with it. I assume the improvement here is how to fabricate such wire with this material.

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