Single-layer T-graphene could be an intrinsic elemental 2D superconductor

A single-layer planar carbon sheet with four- and eight-membered rings, known as T-graphene, could be an intrinsic elemental 2D superconductor with a superconducting transition temperature (T_c) of more than 20 K. This is the new finding from researchers at Nanjing University in China who say that single-layer T-graphene, which could be used to fabricate superconducting nanodevices in the future, might be peeled off from a precursor potassium T-graphene intercalation compound (C₄K) and be synthesized under high pressure in the laboratory. The precursor itself could have record values of T_c for layered carbon-based superconductors.