Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2009-05-30
Int.J.Geom.Meth.Mod.Phys.7:909-931,2010
Physics
High Energy Physics
High Energy Physics - Theory
21 pages, 6 figures, misprints corrected
Scientific paper
10.1142/S0219887810004622
The tunneling effect of two-dimensional Dirac fermions in a constant magnetic field is studied. This can be done by using the continuity equation at some points to determine the corresponding reflexion and transmission coefficients. For this, we consider a system made of graphene as superposition of two different regions where the second is characterized by an energy gap t'. In fact, we treat concrete systems to practically give two illustrations: barrier and diode. For each case, we discuss the transmission in terms of the ratio of the energy conservation and t'. Moreover, we analyze the resonant tunneling by introducing a scalar Lorentz potential where it is shown that a total transmission is possible.
Bouziani Mohamed El
Choubabi El Bouazzaoui
Jellal Ahmed
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