Intraband electron focusing in bilayer graphene
WoS ID: 000306946300003
Scopus ID: 84863661836
We propose an implementation of a valley selective electronic Veselago lens in bilayer graphene. We demonstrate that in the presence of an appropriately oriented potential step, low-energy electrons radiating from a point source can be re-focused coherently within the same band. The phenomenon is due to the trigonal warping of the band structure that leads to a negative refraction index. We show that the interference pattern can be controlled by an external mechanical strain. © IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.