Is this the superconductor of scientists’ dreams? A new claim faces scrutiny

LAS VEGAS — It’s a bold claim: The quest to create a superconductor that works under practical conditions is finally fulfilled, a team of researchers says. But controversy has dogged the team’s earlier claim of record-breaking superconductivity, and the new result is already facing extreme scrutiny.

The ultimate test will be whether the result can be confirmed by other researchers, says physicist Mikhail Eremets of the Max Planck Institute for Chemistry in Mainz, Germany. “I repeat it like [a] mantra: ‘Reproduce.’”

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Many materials become superconductors,

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