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High-temperature superconductors, with a twist
Superconductors have long fascinated physicists, but their low-temperature performance has made them impractical. Now, a new strategy for making and manipulating higher-temperature superconductors has been demonstrated by a research team led by Harvard Professor of Physics and Applied Physics Philip Kim.
The team reports in the journal Science a promising candidate for the world’s first high-temperature, superconducting diode. This could open new doors for fledgling industries like quantum computing, which rely on difficult to sustain mechanical phenomena.
“High-temperature superconducting diodes are, in fact, possible, without application of magnetic fields, and open new doors of inquiry toward exotic materials study,” said Kim.
The team’s experiments were led by S. Y. Frank Zhao, a former student at the Griffin Graduate School of Arts and Sciences and now a postdoctoral researcher at MIT. Using an air-free, cryogenic crystal manipulation method in ultrapure argon, Zhao engineered a clean interface between two extremely thin layers of the cuprate bismuth strontium calcium copper oxide, nicknamed BSCCO (“bisco”).