Earlier this month, Mikhail Eremets and colleagues at the Max Planck Institute of Chemistry in Germany discovered that the superconductivity of lanthanum hydride (LaH10) appears at a temperature of 250K or -23 ° C, but requires a high-pressure condition of 170 GPa, which is equivalent to 1.7 million Double the standard atmospheric pressure or half the pressure at the center of the earth.
At the same time, researchers at George Washington University in the United States have found that the same material can exhibit superconductivity at 280K (7 ° C), but the required pressure is 202 Gigapascals, or 2.02 million times the standard atmospheric pressure. Today's best superconductors need to be cooled to the temperature of liquid helium or liquid nitrogen, and room temperature superconductivity is a long-term goal for scientists.
The high-pressure room temperature superconductivity of lanthanum hydride was discovered in 2014. The samples of materials used by German researchers are very small and have not yet been able to measure the Meissner effect, another key indicator of superconductivity, while American researchers claim that they observed the Meissner effect.
Other scientists have expressed caution about this result. The papers of Eremets and others are published in arXiv, and the papers of American researchers will be published in the journal Physical Review Letters.
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