Unexpected quantum effects in natural double-layer graphene

https://phys.org/news/2022-08-unexpected-quantum-effects-natural-double-layer.html

"naturally occurring double-layer graphene, where no complex fabrication is required. In a first step, the sample is isolated from a piece of graphite in the laboratory using a simple adhesive tape... high electric field perpendicular to the sample: the electronic structure of the system changes and a strong accumulation of charge carriers with similar energy occurs... interactions cause spins of electrons to align... continuously change strength interactions charge carriers... form own electron lattice... electrically insulating"