Electrons in Graphene can become superballistic
which starts a new wave of physics:
"In some high-quality materials, like graphene, electrons can travel micron distances
without scattering, improving the conductivity by orders of magnitude. This so-called
ballistic regime, imposes the maximum possible conductance for any normal metal,
which is defined by the Landauer-Buttiker formalism. Three different experiments,
including one performed by The University of Manchester, demonstrated that at certain
temperatures, electrons collide with each other so frequently they start to flow
collectively like a viscous fluid. N w research demonstrates that this viscous fluid is even
more conductive than ballistic electrons. The result is rather counter-intuitive, since
typically scattering events act to lower the conductivity of a material, because they
inhibit movement within the crystal. However, when electrons collide with each other,
they start working together and ease current flow."
See:
https://www.nextbigfuture.com/2017/0...f-physics.html