A new fusion of materials, each with special electrical properties, has all the components required for a unique type of superconductivity that could provide the basis for more robust quantum computing.
The new combination of materials, created by a team led by researchers at Penn State, could also provide a platform to explore physical behaviors similar to those of mysterious, theoretical particles known as chiral Majoranas, which could be another promising component for quantum computing..
"Creating chiral topological superconductors is an important step toward topological quantum computation that could be scaled up for broad use," said Cui-Zu Chang, Henry W. Knerr Early Career Professor and associate professor of physics at Penn State and co-corresponding author of the paper."Chiral topological superconductivity requires three ingredients: superconductivity, ferromagnetism and a property called topological order.
"Normally, superconductivity and ferromagnetism compete with each other, so it is rare to find robust superconductivity in a ferromagnetic material system," said Chao-Xing Liu, professor of physics at Penn State and co-corresponding author of the paper."But the superconductivity in this system is actually very robust against the ferromagnetism. You would need a very strong magnetic field to remove the superconductivity.
The researchers said they believe this system will be useful in the search for material systems that exhibit similar behaviors as Majorana particles -- theoretical subatomic particles first hypothesized in 1937. Majorana particles act as their own antiparticle, a unique property that could potentially allow them to be used as quantum bits in quantum computers.
This research is supported by the U.S. Department of Energy. Additional support was provided by the U.S. National Science Foundation , the NSF-funded Materials Research Science and Engineering Center for Nanoscale Science at Penn State, the Army Research Office, the Air Force Office of Scientific Research, the state of Florida and the Gordon and Betty Moore Foundation's EPiQS Initiative.
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