suspended CVD graphene
Graphene, the first truly two-dimensional material isolated, is never perfectly flat. Even when it is sandwiched between other atomically flat crystals, it still slightly ripples. These out-of-plane corrugations, the deformation of the graphene layer into the third dimension, have profound implications on graphene’s properties. They reduce the mobility of electrons moving within graphene, just as bumps on a road slow down a car. Here, we demonstrate the presence of such corrugations by studying the quantum mechanical phase electrons acquire in the presence of a magnetic field.