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Nature 407, 139-141 (14 September 2000) | doi:10.1038/35025162

Currents without borders

Paul M. Grant

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Following the discovery of superconductivity at liquid-nitrogen temperatures, the idea of making 'superwires' soon ran into problems. Structural impurities remain the main obstacle, but a high dose of calcium may be the answer.

In the 1960s, a solid-state physics researcher who studied a non-cubic compound that was made up of more than two chemical elements would be committing professional hara-kiri. Not even oxides were considered fashionable.