The tunnelling of electrons through barriers is important in field emission sources and in interconnects within electronic devices. Here we use the analogy between the electromagnetic wave equation ...

We analyse a little known aspect of the Klein paradox. A Klein–Gordon boson appears to be able to cross a supercritical rectangular barrier without being reflected, while spending there a negative ...

Phononic crystal: the barrier was created using two different lattices that comprised acrylic cylinders. (Courtesy: University of Hong Kong) A curious effect called “Klein tunnelling” has been ...