The Massless Dirac Equation in the Refrigerator

We discuss the physics of graphene, which has recently generated great excitement in both the experimental and the theoretical realms. From the theoretical side, the main novelty is that 2D-graphene obeys massless Dirac instead of massive Schrodinger equations. The Dirac equation has mainly been used for the description of the high-energy relativistic physics of electrons and photons. However, here we shall be dealing with electron transport at much lower energy and hence temperature. We also discuss the so-called Klein paradox that can actually be seen, doing away with its paradoxical status forever. The Quantum Hall Effect in graphene also exhibits surprising features related to the Dirac sea.