In popularizations, people tunnel through walls or doors. But what can really tunnel through a graphene sheet without tearing it?
According to Wikipedia, a single layer of graphene absorbs 2.3 % of white light, but 97% makes it through. It conducts electrons well enough to make a transistor.
I doubt that a baseball tunnels through a sheet of graphene without harming it.
But what about a Buckyball? or a smaller molecule? A helium atom? A bare proton?
This looks deceptively like the one dimensional finite barrier problem in elementary QM textbooks. Can we calculate the probability of a given projectile at a given velocity tunnelling through the graphene sheet? Is there any experimental data?
