Intraband electron focusing in bilayer graphene

Details Intraband electron focusing in bilayer graphene Intraband electron focusing in bilayer graphene

2012-03-29

arxiv.org/abs/1203.6517v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

14 pages, 8 figures

Scientific paper

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 phenomena 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.

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