For the first time ever, researchers have created a material that acts as a superconductor at nearly room temperature. But there's a catch.
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Superconductors are the secret sauce that many designs for quantum computers, particle accelerators, and fusion reactors depend on to function. But most superconductors need to be kept at ultra cold temperatures, a drawback that severely limits their use.

Superconductors are aptly named; they’re materials that conduct electricity with zero resistance, meaning a current can move through the material without losing any energy.

They also expel magnetic fields thanks to a phenomenon called the Meissner effect. If an external magnetic field is weak enough, it cannot penetrate the material, but stronger magnetic fields interact with superconductors in one of two ways, depending on the kind of superconductor.

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Finally, the First Room-Temperature Superconductor
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"For decades, physicists have dreamed of discovering a material that could effortlessly convey electricity at everyday temperatures, a feat that would save gargantuan amounts of energy and revolutionize modern technology."

After decades, room temperature superconductivity achieved
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"Fulfilling a decades-old quest, this week researchers report creating the first superconductor that does not have to be cooled for its electrical resistance to vanish. There’s a catch: The new room temperature superconductor only works at a pressure equivalent to about three-quarters of that at the center of Earth."

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"Since its first observation in 1911, scientists have observed superconductivity only at very low temperatures — temperatures within a few degrees of absolute zero, (minus 273 degrees Celsius), which would make widespread and practical application unattainable. In 1968, however, scientists predicted that metallic hydrogen - accessed at very high pressures - could be the key ingredient to discovering superconductivity at or above room temperature."

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