Researchers have not only raised the temperature, but also lowered the pressure required to achieve superconductivity. In a historic achievement, University of Rochester researchers have created a superconducting material at both a temperature and pressure low enough for practical applications.
in front of an audience of scientists who saw the superconducting transition live. A similar approach has been taken with the new paper.
Lutetium looked like “a good candidate to try,” Dias says. It has highly localized fully-filled 14 electrons in its f orbital configuration that suppress the phonon softening and provide enhancement to the electron-phonon coupling needed for superconductivity to take place at ambient temperatures. “The key question was, how are we going to stabilize this to lower the required pressure? And that’s where nitrogen came into the picture.
“The dawn of ambient superconductivity and applied technologies has arrived,” says Ranga Dias, whose lab has created a viable superconducting material they’ve dubbed “reddmatter.” Credit: University of Rochester photo / J. Adam Fenster The 145,000 psi of pressure required to induce superconductivity is nearly two orders of magnitude lower than the previous low pressure created in Dias’s lab.With funding support from Dias’s National Science Foundation CAREER award and a grant from the US Department of Energy, his lab has now answered the question of whether superconducting material can exist at both ambient temperatures and pressures low enough for practical applications.
Particularly exciting, according to Dias, is the possibility of training machine-learning algorithms with the accumulated data from superconducting experimentation in his lab to predict other possible superconducting materials—in effect, mixing and matching from thousands of possible combinations of rare earth metals, nitrogen, hydrogen, and carbon.
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