Dependence of the tunneling properties on an anisotropic factor in a graphene-like system

Abstract

In analogy with the Klein tunneling in an isotropic linear energy graphene system, we reveal an anisotropic Klein tunneling in an anisotropic two dimensional (2D) linear energy system. The chirality and the absence of the back scattering leads to the Klein tunneling. The tunneling characteristics can be tuned by the barrier structure, the incident energy and angle, and more importantly the anisotropic parameter and different potential direction. The controllable Klein and side tunneling peaks can be understood by the carrier states and the phases in barrier/well regions. This interesting tunneling behaviors enrich the 2D tunneling properties and broaden the studies on the three-dimension tunneling features which will enlarge its electronic applications.