We study Klein tunneling across a PN junction in monolayer graphene (MLG) and the AB-bilayer
graphene (BLG) under the effect of a perpendicular magnetic-field (B-field). In the Klein tunneling
process, normally incident electrons in MLG (BLG) are fully transmissive (reflective) upon hitting
the junction barrier. When a finite B-field is applied, transmission of the normally incident
electrons is suppressed in MLG over an energy range around the PN barrier height, effectively
opening an energy gap. This suppression may be attributed to the magnetic deflection arising from
Lorentz force, which shifts the transmission profile of the device in the transverse direction.
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Copyright (2013) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in J. Appl. Phys. 114, 084314 (2013) and may be found at http://dx.doi.org/10.1063/1.4819799.