Scientists found a way to let electrons walk right through energy barriers like the walls aren't even there.
March 24, 2026
Original Paper
Super-Klein tunneling in 2D Lorentzian-type barriers in graphene
arXiv · 2603.20950
The Takeaway
In standard physics, hitting a barrier usually means a particle bounces back or struggles to 'tunnel' through. This 'Super-Klein tunneling' in graphene creates a state where the barrier becomes effectively invisible, allowing particles to move through perfectly regardless of how high or thick the wall is.
From the abstract
We introduce a two-dimensional model of spin-1/2 Dirac fermions in graphene subjected to a highly tunable electric field, which exhibits super-Klein tunneling. The electric field can be continuously interpolated between two limiting configurations: a uniform electrostatic Lorentzian barrier with translational invariance and a chain of well-separated electrostatic scatterers. We demonstrate that super-Klein tunneling arises naturally as a direct consequence of the intrinsic connection of the mode