Electronic and transport properties of zigzag phosphorene nanoribbons doped with ordered Si atoms

Publication date: Available online 11 November 2019Source: Physics Letters AAuthor(s): N. Liu, J.B. Liu, S.L. Wang, K.L. YaoAbstractUsing density functional theory (DFT) and the nonequilibrium Green's function method, we explored the electronic structures and transport properties of zigzag phosphorene nanoribbons (ZPNRs) with ordered doping of Si atoms. Our results show that both pristine and Si-doped ZPNRs exhibit metallic properties and the conductance of the doped ZPNRs nanoribbons can be modulated effectively by changing doping positions and concentrations. As different doping positions, different transmission currents can be obtained even with the same doping concentration. Moreover, current amplification factors vary with the doping concentrations. In addition, compared with the pristine system, negative differential resistance effect can also be observed in doped system (Si3), which occurs in lower bias range.

Source: Physics Letters A - November 12, 2019 Category: Physics Source Type: research