Tunneling Effect in Gapped Phosphorene through Double Barriers

TL;DR

This paper investigates charge transport in gapped phosphorene with double barriers, revealing anisotropic tunneling behavior and oscillatory conductance, contrasting with graphene's Klein tunneling.

Contribution

It provides a detailed numerical analysis of transmission and conductance in phosphorene with double barriers, highlighting anisotropic effects and oscillatory phenomena.

Findings

Phosphorene exhibits highly anisotropic transport properties.

No Klein tunneling signature at normal incidence in phosphorene.

Transmission and conductance oscillate with barrier width under certain conditions.

Abstract

We study the transport properties of charge carriers in phosphorene with a mass term through double barriers. The solutions of the energy spectrum are obtained and the dependence of the eigenvalues on the barrier potentials and wave vectors in the $x$-direction is numerically computed. Using the boundary conditions together with the matrix transfer method, we determine transmission and the conductance of our system. These two quantities are analyzed by studying their main characteristics as a function of the physical parameters along the armchair direction. Our results show the highly anisotropic character of phosphorene and the no signature of Klein tunneling at normal incidence contrary to graphene. Moreover, it is found that the transmission and conductance display oscillatory behaviors in terms of the barrier width under suitable conditions.