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May 23, 2019 03:30 am

New Paper Confirms Near-Room-Temperature Superconductivity In Wild, Hydrogen-Rich Material

An anonymous reader quotes a report from Gizmodo: A team of physicists has published peer-reviewed results documenting near-room-temperature superconductivity in the hydrogen-rich compound lanthanum hydride. The team, led by physicist Mikhail Eremets from the Max Planck Institute for Chemistry, kicked off the most recent race for a high-temperature superconducting hydride in 2015, when they published a paper announcing the discovery of superconductivity at -70 Celsius (-94 Fahrenheit). In this most recent paper, the researchers placed a piece of lanthanum into an insulating ring, then placed it into a box full of pressurized hydrogen gas. They clamped the gasket between a pair of diamonds, and continued squeezing the diamonds until they hit the desired pressures, nearly 2 million times the pressure on the surface of Earth. Then, they hit the sample with a laser to form the lanthanum hydride. Finally, they take measurements to confirm they really created the material and that it's really a superconductor. The researchers detail two measurements in the paper: In one, they measure the resistance drop to zero at the -23 Celsius or -9.67 Fahrenheit temperature. In another, they notice that this temperature decreases in the presence of a magnetic field -- a clue that they were actually measuring the sample rather than something being wrong with their experimental setup.

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