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Intraband electron focusing in bilayer graphene

Research output: Contribution to journalJournal article

Published

Journal publication date21/06/2012
JournalNew Journal of Physics
Volume14
Number of pages13
Pages063028
Original languageEnglish

Abstract

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.