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Joined 2026-09-21 Message
Incoming links: High-temperature superconductivity
High-temperature superconductivity 2026-10-18
High-temperature superconductivity is a historical name for superconductivity above earlier metallic benchmarks. The original Bednorz-Müller experiment operated at tens of kelvins, requiring deep cooling; cuprate superconductors opened a new materials family.[ref]
Perovskite-type oxides: The new approach to high-Tc superconductivity by Johannes Georg Bednorz and Karl Alexander Müller. Part 1, p.426, historical comparison
A higher superconducting transition temperature enlarges the available operating range, but useful transport also needs a sufficient superconducting critical current at the operating temperature and magnetic field. In a ceramic, connections between grains can limit the whole specimen even when individual grains support superconductivity. This connects the materials problem to superconducting weak links and the Josephson effect. The parallel-path model of a superconducting ceramic below isolates why connectivity matters.