The material used in this first-of-a-kind superconductor could make data servers more energy-efficient.
Bullet trains were probably not on the minds of Ali and his colleagues when they set about their work. “My group was not approaching this research with the goal of realizing one-way superconductivity actually,” says Ali.
As the study team made thinner and thinner sheets of Nb3Br8, they found that it actually became more and more conductive. That’s unusual. To further investigate, they turned to a tried technique: making a sandwich. Two pieces of a known superconductor were the bread, and Nb3Br8 was the filling. The researchers could learn more about Nb3Br8 from how it affected the sandwich. And when they looked, they found that they’d made a one-way superconductor.
Yet Ali and his colleagues don’t fully know how this effect works in the object they created. It also, as it turns out, “violates our current understanding of how one-way superconductivity can occur,” says Ali. “There is a lot of fundamental research as well that needs to be done” to uncover the hidden new physics.
For people who dream of constructing electronics with superconductors, the ability to send electricity in one direction is a powerful inspiration. “You could imagine very cool device applications at low temperatures,” says Bhattacharya., which harness particles like atoms to make devices that do things conventional computers can’t.
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