Carbon-nanotube based highly flexible superconducting wire*

In this work, we explored the feasibility of new fabrication of superconducting wire by using carbon nanotube (CNT) based yarn combined with superconducting materials. CNT yarn has been extensively studied due to its various outstanding mechanical properties. And it also could show multifunctional characteristics by combining with various guest materials.
Here, we used a sputter-deposition process for niobium nitride (NbN) to make superconducting yarn. It shows superconducting property that is not much different from NbN film. And also we showed the superior mechanical flexibility of the sample by performing as knot tying and bending. In addition, we tested to reduce the resistance in the normal state for the practical necessity such as superconducting cable application.