Insights into electronic and transport properties of phosphorene nanorings in two perpendicular directions: Effects of circular and elliptical external potentials

Abstract

In this work, we study the electronic and transport properties of phosphorene nanorings in two perpendicular directions (zigzag and armchair directions) in the presence of zigzag metallic source and drain leads. Our results are based on the non-equilibrium Green's function (NEGF) method and a five-parameter tight-binding (TB) approach. We investigate how system parameters affect the electronic transport. These parameters include the radius of the rings, the width of the leads and the external potential. Our results show that for all configurations studied, a transport energy gap exists whose width can be tuned by the width of the leads and the radius of the nanoring. The transmission function of wider leads shows more sensitivity to the variation of the inner radius due to higher electronic states that can respond to smaller changes in the scattering region. In addition, the transport along the armchair direction is more susceptible to tuning than the transport along the zigzag direction. The effects of external potentials on the conductance are more pronounced than the geometrical parameters. In particular the circular potential of the amplitude of 0.1 eV can widen the transport gap by about ~0.35 eV.

12 pages, 7 main figures

References in corpus (16)

• Quasiparticle band structure and tight-binding model for single- and bilayer black phosphorus
• Exceptional piezoelectricity, high thermal conductivity and stiffness and promising photocatalysis in two-dimensional MoSi2N4 family confirmed by first-principles
• Phosphorene nanoribbons, nanotubes and van der Waals multilayers
• The Electronic Properties of Phosphorene/Graphene and Phosphorene/Hexagonal Boron Nitride Heterostructures
• Electrically Tunable Quasi-Flat Bands, Conductance and Field Effect Transistor in Phosphorene
• Modulation of electronic and mechanical properties of phosphorene through strain
• Interplay of the Aharonov-Bohm effect and Klein tunneling in graphene
• Electric- and magnetic-field dependence of the electronic and optical properties of phosphorene quantum dots
• Aharonov-Bohm effect in monolayer black phosphorus (phosphorene) nanorings
• Tuning Phononic and Electronic Contributions of Thermoelectric in defected S-Shape Graphene Nanoribbons
• Pseudospin Electronics in Phosphorene Nanoribbons
• Robust procedure for creating and characterizing the atomic structure of scanning tunneling microscope tips
• Electrostatic quantum dot confinement in phosphorene
• Tunable electronic properties and electric-field-induced phase transition in phosphorene/graphene heterostructures
• Electronic transport and thermoelectric properties of phosphorene nanodisk under an electric field
• Aharonov-Bohm oscillations of four-probe resistance in topological quantum rings in silicene and bilayer graphene