Directional photoelectric current across the bilayer graphene junction

Details Directional photoelectric current across the bilayer graphene junction Directional photoelectric current across the bilayer graphene junction

2008-09-25

arxiv.org/abs/0809.4476v2

Physics

Condensed Matter

Other Condensed Matter

7 pages 5 figures

Scientific paper

10.1088/0953-8984/21/1/015301

A directional photon-assisted resonant chiral tunneling through a bilayer graphene barrier is considered. An external electromagnetic field applied to the barrier switches the transparency $T$ in the longitudinal direction from its steady state value T=0 to the ideal T=1 at no energy costs. The switch happens because the a.c. field affects the phase correlation between the electrons and holes inside the graphene barrier changing the whole angular dependence of the chiral tunneling (directional photoelectric effect). The suggested phenomena can be implemented in relevant experiments and in various sub-millimeter and far-infrared optical electronic devices.

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