Graphene is a one-atom-thick layer of carbon atoms that is 200 times stronger than steel, but
It is known as a good conductor of heat andelectric current, but difficult to handle. Now scientists at Harvard are reporting the successful stacking of three sheets of graphene. Then they twisted them to create a three-layer structure that is not only capable of superconductivity, but also has strength, and also works at higher temperatures.
The new and improved system is also sensitive to the external electric field, allowing the level of superconductivity to be tuned by adjusting the strength of that field.
The three-layer system showed that itssuperconductivity is due to strong interactions between electrons, not weak ones. If true, then these data could help pave the way not only to high-temperature superconductivity, but also possible applications in quantum computing.
The researchers plan to continue studying the nature of this unusual superconductivity in further research.
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