The effect of magnetic field on chiral transmission in p-n-p graphene junctions.

ABSTRACT: We investigate Klein tunneling in graphene heterojunctions under the influence of a perpendicular magnetic field via the non-equilibrium Green's function method. We find that the angular dependence of electron transmission is deflected sideways, resulting in the suppression of normally incident electrons and overall decrease in conductance. The off-normal symmetry axis of the transmission profile was analytically derived. Overall tunneling conductance decreases to almost zero regardless of the potential barrier height V0 when the magnetic field (B-field) exceeds a critical value, thus achieving effective confinement of Dirac fermions. The critical field occurs when the width of the magnetic field region matches the diameter of the cyclotron orbit. The potential barrier also induces distinc

SUBMITTER: Li Y 

PROVIDER: S-EPMC4683455 | biostudies-literature | 2015 Dec

REPOSITORIES: biostudies-literature