Graphene shows signs of superconductivity

With extra ingredients, a flat form of carbon displays evidence of resistance-free current.

GRAPHENE ADDITIVE Pure graphene (a) is a great conductor. But a new study demonstrates that graphene doped with calcium (d) is a superconductor at low temperatures. Trials with potassium (b) and cesium (c) showed no superconductivity.

Chalk up another superpower for the thinnest material on the planet.

When sprinkled with certain atoms, graphene — a flat sheet of honeycombed carbon atoms — conducts electrical current with no resistance at low temperatures, four research teams report. While graphene has awed scientists with its conducting prowess for over a decade, this is the first evidence that the wonder material can be a superconductor.


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