Twisted graphene has become the big thing in physics

Also slow to pursue the magic angle was Philip Kim, a physicist at Harvard University and a kind of dean of the experimental twisted bilayer graphene field. In addition, the sudden jumps in twisted bilayer graphene — from conducting to insulating to superconducting — with just a tweak of an external electric field indicate that free electrons are slowing to a virtual halt, notes physicist Dmitri Efetov of the Institute of Photonic Sciences (ICFO) in Barcelona, Spain. Twisted bilayer graphene, on the other hand, is nothing but carbon, and “doping” it with more electrons merely requires applying a readily varied electric field.

Source: www.quantamagazine.org