Graphene, the one-atom-thick sheet of carbon atoms, continues to provide surprises with possibly enormous implications. Yuan Cao from MIT and colleagues show that a stack of two graphene layers can conduct electrons with zero resistance if the layers are twisted at a “magic angle” of 1.1° — a discovery that could be a step towards room-temperature superconductors. The material still needs to be cooled to 1.7 K, but the results indicate that it may superconduct in a way similar to high-temperature cuprates and point the way towards higher superconducting temperatures. Details of exactly what is taking place are being worked out.

Further reading

Y Cao et al. 2018 Nature 556 43.